|Posted on 9 November, 2017 at 2:35||comments (0)|
Home security Systems Introduction
This is a digital home security system with voice feature which can monitor room temperature, smoke, motion, and
windows & doors.
The goal of this project is to utilize the after-market parts and build an integrated home security system. Besides
traditional magnetic switch equipped on doors and windows, we have also incorporated temperature sensor, smoke
detectors, and motion sensor. Hence the security system will sound an alert when there is an attempt of break-in
or if there is possible smoke or fire.
The system is fully digital and also be fully customized. It incorporated a 16x2 LCD display with a 4x4 keypad. Each
sensor can be enabled or disabled, and alarm frequency and skim can also be chosen by users. We have also
equipped a voice playback chip, and it will speak which sensor has gone wrong.
Page 1 of 12
High Level Design
The idea of our project comes from lab 3 when we did a simple security system. However, that security
system is quite basic and only offers simple password lock. Hence we would like to enhance our
security system with different kinds of sensors. We have also browse some of the old final project and
found the "Phone Dialer" project from spring 2002. Originally, we were going to put Zarlink MT8880C
DTMF transceiver chip, so it will dial a desire number that user specify. When the phone connected, we
will use Winbond ISD1420 voice record and playback chip to play pre-recorded voice signal. However,
due to the lack of the phone jack in the lab, plus the majority of the Cornell campus has digital phone
line instead of analog phone line, we decided to put away this idea. Since ISD1420 chip has address bit
feature, we decided to make our system playback certain pattern of voice when the system goes into
Hardware & Software Tradeoffs
The IR motion sensor is quite inexpensive ($5.99 dollars for the one we got), so we also decided to buy
it instead of building one on our own. We also acquire one of the smoke detector from home. This is
the very basic version and will sound the alarm when the smoke is detected.
The logical structure of our
design is shown in the block
diagram on the right. The
central system will handle
all the sensors and keypad
input, output information to
LCD screen, indicate system
status on LED, and make
buzz or voice alarm.
Page 2 of 12
Besides some necessary capacitor and resistor connections to the ISD1420 chip, the majority of our
project is based on our software. This is mainly because our system if fully customizable and has quite
a lot of features. It need to monitors all the sensor, and time the appropriate seconds in order to play
certain voice pattern (ex. "Temperature, smoke error, please…" "Door or window error, please…")
depending on which sensor goes wrong. It also need to handle the user interface via keypad and LCD
screen. All of these are programmed in our software.
The 16x2 LCD we use has standard 16 pin connection (pin 15 and 16 for LED backlit power). The
keypad is also standard 4x4 which has 8 pin connector. The smoke detector is powered by standard Eblock
9V battery. The motion sensor is powered by 2 AAA 1.5V battery in serial.
Existing Patents, Copyrights and Trademarks
The magnetic contact switch is manufactured by SECO-LARM? The motion detector is manufactured by
SPY GEAR. The smoke sensor is a little bit hard to identify because we do not have the original box, but
we believe it manufactured by FAMILY GARD?
Program & Hardware Design
The hardest part of the program is timing. When any sensor goes wrong, the program will wait for
certain seconds (set by user), and then make ISD1420 chip play back the desired voice pattern we
want. Originally, we though we can just output the appropriate address bit and then make the chip
play, however, later on we discovered there is a THOLD in the ISD1420 chip that we need to take care
of, otherwise it will reference to the previous address bits. The voice playback chip does not have a
very fast internal clock, so we have to manually use the delay function in our program after we set the
address bits, and then make the chip play. Although using the delay function is somehow undesirable,
however, we have implemented our program such that this delay will not cause any error in our
Besides, we also need to implement the keypad function so it acts accordingly when the LCD is
displaying certain menu. This is not very difficult but we have to take care of all the possible
circumstances. We have 12 submenus in our system. Set temp define the lowest temperature allowed
before sounding the alarm (70~120F, with step size of 1F). The Sec. Allow is the time in second before
the voice alarm goes off (0~30sec, with step size of 2 seconds).
We also have simple de-bounce feature for our keypad, and it will sound a buzz when you press any
key (if you HOLD a key but buzz will only sound once). Although the de-bounce function is as easy as
6.Set Temp: 100F
A.Buzz Freq: 7
B.Buzz Skim: 3
C.Sec. Allow: 10
Page 3 of 12
few lines, it takes a while to think about the logic and how to actually implement it. Also we implement
the backspace feature so that when use enter a wrong password, this key can be used to delete the
previous entered number. Also just a quick note, our password is masked on LCD for a safer purpose.
The first sensor we have is the temperature sensor. Since we implemented a digital thermometer in lab
5, we decided to use the same circuit. So we incorporated National Semiconductor LM34 temperature
sensor, with National Semiconductor LMC7111 OpAmp chip to amplifier our output voltage going into
ADC. The final connection of our circuit look like the following.
The second sensor we have is the motion sensor. Although we do not have the diagram of the circuit (it
has some IC components), we discovered there are few NPN transistors in the circuit. NPN transistors
are like switches, so it is obvious these are used enable the original buzzer on the circuit. Hence we
took the base pin together with ground to connect to our ADC pin input. If the voltage exceed VTH
(threshold voltage), we know the alarm goes off.
The third sensor we have is the smoke detector. The smoke detectors mostly equipped with
piezoelectric buzzer, which has F (feed back), C (main electrode), M (metal plate) three pins.
Piezoelectric buzzer has an internal crystal and will sound if small current is applied (voltage drop).
Hence we took out the piezoelectric buzzer and connect the F pin into our ADC input. When the sensor
goes off, the voltage will go high.
The final sensor we have is the magnetic switches. It is normally closed. So when the switch is right
next to each other, the resistance is zero. When the switch is separated, the resistance will become
infinity as if it’s disconnected. So we drive the switch with an 10K pull-up resistor, and connect the
output to the ADC. Since we have two magnetic switches, we decided to build a simple AND/OR gate
by using 1 74LS00 chip. There are four NAND gates in 74LS00, and if we connect two of NAND gate in
parallel with their input signal to another NAND gate, we will get as if there are 2 AND gate in parallel
with their signals to an OR gate. The diagram can be found in our appendix.
The Winbond ISD1420 voice record and playback chip also requires external resistors and capacitors.
We build the circuit from the reference circuit on ISD1420 specification sheet. The modification we have
is to connect the address bit to our PORTB on our MCP, and PLAYL to our pin 6 in PORTA of our MCP.
The specification of this chip can be downloaded from the appendix. In addition, we also learn some
information about piezoelectric buzzer from this websitehttp://www.securitycctvmelbourne.com.au/home-security-systems http://www.securitycctvmelbourne.com.au/home-security-systems
The 4x4 keypad has the layout like the table on the right. The - and +
buttons next to 0 can increase numbers in the submenu, such as time or
frequency. the UP and DOWN button next to 3 and 6 will navigate the
menu. BK is backspace while entering the password. EN is enter and is
used do enable/disable menu item or enable the system.
1 2 3 ˆ
4 5 6 ˇ
7 8 9 BK
- 0 + EN
Page 4 of 12
Result of the Design
Speed of Execution
The speed of the execution is work very well. In the beginning the system will boot up with default
password 1234. The user can now navigate through our menu, and enable or disable each type of
sensor. If a particular sensor is enabled, the LCD screen will output a * symbol before the sensor
name. User can also set the alert temperature, enable/disable voice or buzzer alarm, and even specify
the ring tone and frequency of the buzzer alarm and the time before voice alarm goes off. The button
de-bounce scheme also works fine so users can navigate through the menu and use the keypad
After the user enables the security system, the green status LED will lid to indicate the system status.
User can now enter proper password to unlock the system. If any sensor goes wrong, the LCD will
output ERROR and with proper initial for the sensor (T for temperature, M for motion, S for smoke, D
for door or window magnetic switch). The red led light be will flashing at 4Hz to indicate such event. If
the buzz alarm is enable, it will sound the tone that user choose. If the voice alarm is enabled, it will
wait for few seconds (user specified), if the system is still not locked, then it will start playing voice to
indicate which sensor goes wrong. (For example, "Temperature Error, please check and unlock the
security system.") If another sensor goes wrong after that, the system will also act accordingly and
indicate that in the voice alert in addition to the LCD screen. ("Temperature Motion Error, please check
and unlock the security system.")
As soon as user enters the correct password, the system will be unlocked and the buzzer and voice
playback will stop. The user can now navigate through our menu and make any changes in the
There are two kinds of smoke detectors, ionization chamber and photoelectric smoke detectors.
Ionization chamber one is more popular due to its low cost. Our smoke detector from home also has an
ionization chamber. However, this kind of smoke detector has a small amount of radioactive material
(americium-241), which has a half-life of 432 years (alpha decay). We have checked the specification
of such radioactive element and government web pages regarding to such kind of material. We have
found such radiation is relatively small as long as we do not inhale or swallow it. The exposures is
relatively weak so as long as we are not in touch of it all the time, it is relatively safe to operate the
smoke detector on the Home security Systems
Our home security system is very practical. It can be used not only in the home environment but also
in a business environment too. It can monitor the surrounds to not only protect our properties but also
our lives. Besides, it can be highly customized to suit each one's need and preference. So our security
system is very useful for us as well as other people. We believe every house in the world should equipt
Page 5 of 12
a security system like the one we design.
Expectation and Improvement
The result of our design has met our expectation, in which every sensor is working and will sound
specific alarm when the system goes into alert status. The keypad and LCD also offer great interface
and users can be familiar with our system in less than few seconds.
If we have chance to design this project again, we will add a phone dialer chip like the Zarlink MT8880C
we mentioned before. By doing so, we can make sure if no one is at home or if no one is around the
area, someone else can be notified to take immediate action. In addition, we feel like our PORTB is a
little bit wasted. We only have 4 output patterns but we are using all 8 pins. Next time we will use 74LS
series chip together with only 2 output pins from MCP, so together we can save 6 I/O pins. Besides, we
will like to have another small microcontroller at a higher frequency, so we can output our buzz alarm
at a higher frequency tone.
Besides the reference circuit from ISD1420 chip specification, reference keypad decode scheme from
lab 3, and temperature sensor circuit from lab 5, we have designed and coded everything on our own.
There is no code from public domain, and we did not reuse any code from the previous lab (we do
reference, but not copy). Because we are using two pre-built sensor circuits (motion and smoke
sensor), we feel like we should not pattern our whole design. However, if we take out these two parts
and only have these “inputs,” we definitely have opportunity to pattern our design.
Reference to IEEE Code of Ethics, we have try our best effort to meet all requirements. Here are the
1. To accept responsibility in making engineering decisions consistent with the safety, health and
welfare of the public, and to disclose promptly factors that might endanger the public or the
Our design kept safety as one of the top priorities. For example, we could have built the smoke
detector circuit on our own. However after we found out that it’s radioactive and it would be dangerous
to expose the radioactive material; we decided to keep the smoking detector intact. We do not want to
injury anyone working around us or spread radioactive material in the air.
2. To be honest and realistic in stating claims or estimates based on available data.
From the beginning we were realistic about the specifications of our projects given time, knowledge,
and economic constrains. Our final project closely follows our claims except we give up on the phone
dialer part because there is no active phone jack in the lab.
4. To reject bribery in all its forms.
Page 6 of 12
We were not bribed in anyway and we will not accept any bribery in the future.
7. To seek, accept, and offer honest criticism of technical work, to acknowledge and correct errors, and
to credit properly the contributions of others
We asked TA’s and Prof. Land when we encountered any difficulties. We are grateful for any insights
they shed on our project.
8. To assist colleagues and co-workers in their professional development and to support them in
following this code of ethics.
The lab was a cooperative work environment. When we encountered problems we always welcomed
inputs and feedbacks from our fellow classmates and many time they can help us pinpoint the problem.
We also did the same thing to them while working on this project.
|Posted on 31 October, 2017 at 7:35|
CCTV installation Melbourne
reducing the amount of data transferred and stored in a network video system. There are advantages and disadvantages to each, so it is best to consider the goals of the overall surveillance system when deciding which of the two standards is most appropriate. Due to its simplicity, Motion JPEG is often a good choice. There is limited delay between image capturing, encoding, transfer, decoding, and finally display. In other words, Motion JPEG has very little latency, making it most suitable for real-time viewing, image processing, motion detection or object tracking. Motion JPEG also guarantees image quality regardless of movement or image complexity. It offers the flexibility to select either high image quality (low compression) or lower image quality (high compression), with the benefit of smaller file sizes and decreased bandwidth usage. The frame rate can easily be adjusted to limit bandwidth usage, without loss of image quality. However, Motion JPEG files are still typically larger than those compressed with the MPEG-4 standard. MPEG-4 requires less bandwidth and storage to transfer data resulting in cost savings. At lower frame rates (below 5 fps) the bandwidth savings created by using MPEG-4 are limited. Employing Motion JPEG network cameras with video motion detection built in, is an interesting alternative, if a higher frame rate is only required a portion of the time when motion is in the image. If the bandwidth is limited, or if video is to be recorded continuously at a high frame rate, MPEG-4 may be the preferred option. Because of the more complex compression
in a MPEG-4 system, there is more latency before video is available at the viewing station. The viewing station needs to be more powerful (and hence expensive) to decode MPEG4, as opposed to the decoding of Motion JPEG streams. One of the best ways to maximize the benefits of both standards is to look for network video products that can deliver simultaneous MPEG-4 and Motion JPEG streams. This gives users the flexibility to both maximize image quality for recording and reduce bandwidth needs for live viewing. One other item to keep in mind is that both MPEG-2 and MPEG-4 are subject to licensing fees, which can add additional costs to the maintenance of a network video system. It is important to ask your vendor if the license fees are paid. If not, you will incur additional costs later on.
Other Considerations Another important consideration is the use of proprietary compression. Some vendors don’t adhere to a standard 100 percent or use their own techniques. If proprietary compression is used, users will no longer be able to access or view their files should that particular vendor stop supporting that technology. Proprietary compression also comes into consideration if the surveillance video will potentially be used in court. If so, using industry standard compression ensures that video evidence will be admissible. Some courts believe that evidentiary video should be based on individual frames, not related to each other or manipulated. This would eliminate MPEG because of the way the information is processed. The British
court system, which has been leading digital video admissibility, requires an audit trail that describes how the images were obtained, where they were stored, etc., to make sure the information is not tampered with in any way. As digital video becomes more widely adopted, the issue of admissibility in court will be one to watch. Compression is one of the most important factors to building a successful network video system. It influences image and video quality, latency, cost of the network, storage, and can even determine whether video is court admissible. Because of these considerations, it is important to choose your compression standard carefully ... otherwise, the video may be rendered obsolete for your purposes.
Does one compression standard fit all? When considering this question and when designing a network video application, the following issues should be addressed: • What frame rate is required? • Is the same frame rate needed at
all times? • Is recording/monitoring needed at
all times, or only upon motion/event? • For how long must the video
be stored? • What resolution is required? • What image quality is required? • What level of latency (total time for
encoding and decoding) is acceptable? • How robus/secure must the system be? • What is the available network
bandwidth? • What is the budget for the system?
Corner Thin/Wide Box Mounting The corner thin/wide box is designed to be installed with a gooseneck tube.
Items Needed: • Dome Camera • Gooseneck Tube and other equipped items (optional accessory) • Corner Thin/Wide Box (optional accessory) • Waterproof Rubber (standard accessory for the outdoor dome) • Screws and Screw Anchors for fixing the Corner Thin/Wide Box (not supplied)
Tools Needed: • Tool for drilling
• Tool for screwing
Follow the steps to mount the dome with the corner box and gooseneck tube. 1) Make a cable entry hole on the wall to recess the cables. Otherwise, cables can be threaded through the cable entry hole on the tube. 2) Fix the Corner Thin/Wide Box on corner wall with proper screws and screw anchors (not supplied). 3) Attach the gooseneck tube to the fixed corner box with the supplied screws and washers. 4) Attach the waterproof rubber to the gooseneck tube. 5) Thread the cables through the gooseneck tube and the top holder. 6) Fix the top holder to the gooseneck tube with the supplied screws and washers. Then adjust the waterproof rubber to the junction of straight tube and top holder. 7) Connect the cables to the dome camera. Then attach the dome to the top holder and fix them with the supplied screw
|Posted on 11 October, 2017 at 8:10||comments (0)|
CCTV cameras Melbourne
It’s fair to say that in recent times, there’s been an explosion of increasingly sophisticated IP (internet protocol) cameras – and in this guide to the best of Security camera systems, we’ve covered the smartest smart cameras on the market. You won’t find any analogue closed-circuit TV systems here, and instead of complex centralised IP systems, we have chosen decentralised devices that are equally effective on their own as they are in a pack.
These smart cameras can simply join Wireless cameras in your building in order to relay footage directly to your phone, wherever you are in the world, with no need for a networked video recorder, while any motion-triggered recordings can be saved in the cloud, or locally on a microSD card.
By using a smartphone as your interface, many new features are made possible. For instance, you can draw areas of active motion sensitivity within the camera’s field of view to limit the number of alerts that arrive on your phone, and some of these cameras have object recognition and can tell the difference between a person and an animal, or a car.
The most significant thing that these new IP cameras have in common is their accessibility. None of our top 10 selection require a professional installation and they all come with slick companion apps that make protecting your property easy and, if we’re honest, kind of fun. Let’s get things underway then, with our number one security camera of the moment
As enthralled as we are with the individual capabilities of IoT devices, in the security world the more important aspect of this trend is how all the components work together to solve a tangible challenge. First, IoT-based systems must be easy to design, install, maintain and use. And one size does not fit all.
To maximise the potential of IoT, it requires an in-depth knowledge by suppliers who 1) understand how each feature or component works together, 2) can design a solution that can be used to solve specific challenges, and 3) are able deliver it as an integrated offering whose long-term value has more value than just the sum of its parts.
CCTV cameras Melbourne especially true as security solutions move well beyond their roots in cameras. Indeed, largely because of IoT, the security sector’s traditional boundaries continue to blur. For example, network cameras can be used for Building Information Management (BIM), Business Intelligence (BI) in retail and even leaping into scientific research with real-time analysis of traffic patterns and crowd movements. IoT will allow for combined systems integrating previously disparate devices such as video surveillance cameras, smoke detectors, access control panels and loudspeakers into a common management console providing a ‘single pane of glass’ overview across entire buildings and sites.
The result is a huge opportunity for security solutions that are purpose-built to share useful data with other connected devices, all of which can be monitored remotely. This connectivity between devices will provide end users with more complete situational awareness across multiple locations.
Axis Communications itself is branching out and has introduced IP-based loudspeakers and door controllers, for example, enabling not just an Internet of Things, but a step towards truly smart buildings.
With the increasing amount of data being generated, shared over the network, and, in many cases, stored and accessed through cloud computing models (see below), there is a growing need to focus on the protection of all this data and assets that exist ‘virtually.’
New technologies and methods for enhancing cyber security specifically for networked and cloud-based security systems are emerging. This is critical to protect against vulnerabilities, such as hacking, and will be an important aspect of how physical security and surveillance solutions are designed and implemented.
|Posted on 24 September, 2017 at 7:05||comments (0)|
Security in your home or at your workplace is a necessity especially when valuables are involved. Security can be branded under many names such as BOSCH or DAHUA and many different types such as dome cameras or alarms this effects the type of security you have. Security at home has many needs and at work it also depends on what they have.
The type of security used is important because you don’t want an employee accidentally triggering the alarm or you don’t want to leave burglars get away with anything, it all depends on what you are doing and where it is. The location is the most important thing because you don’t want a camera or motion detector facing the wall and where it is in general. if the security is used personally or in a house hold motion detectors are the best for when you’re out and about and no one will be home, however in a work place cameras are the best for busy environment’s. security needs to be in the right place for them to work properly.
Security comes in many different forms such us cameras, MDs or dome cameras. Dome Security Cameras are named for their dome like shape. Dome cameras are commonly used in surveillance systems inside of homes. This is because dome cameras are more fashionable and blend in very well to their surroundings. A bullet camera often used in surveillance systems, named because of its shape and size. Bullet cameras are small and are limited to a fixed focal length lens.
All of the information above is useless if you aren’t going to buy it but the protection of your belongings is extremely important especially to those who own quite an expensive product such as a ring or jewellery but this is only part of the many reasons why security should be installed in your house.
Dahua Technology, a leading solution provider in the global video surveillance industry, announces the adoption of Theia’s 4K lens family on its IPC-HF81230E Ultra HD Box Camera. Theia Technologies, LLC. is an IP video surveillance lens specialist.
4K CCTV Cameras resolution is a revolutionary breakthrough in image processing technology. Dahua IPC-HF81230E Ultra HD Box Camera delivers four times the resolution of standard HDTV 1080p cameras and offers superior picture quality and image details. 4K resolution considerably improves the clarity of magnified scenes, enabling the Dahua IPC-HF81230E Ultra HD Box Camera to view or record crisp-clear forensic video from large areas. With SONY advanced STARVIS image sensor which increases the pixel size to 1.85 µm, Dahua IPC-HF81230E Ultra HD Box Camera is capable of delivering 4K resolution video under lowlight environment. This makes the camera ideal for video surveillance applications that require low-illumination performance together with high definition.
Theia’s 4K lenses offer resolution performance matching the image quality promised by 4K sensor and provide good coverage of the larger 1/1.7”4K imagers.
The varifocal lens family covers a horizontal field of view from 112 to 9 degrees, with the SL410 4-10mm lens and SL1250 12-50mm lens. The lenses maintain 4K resolution in Day and Night with less than 5 microns focus shift in near IR light. The lenses are extremely compact given their large format, at only 52mm long. Compared to other commonly found 1/1.7” format 4K lenses with similar features, they are much smaller, allowing them to fit into smaller enclosures.
At F/1.4 the SL410 boasts the fastest F number and likely the best light gathering ability of any 4k 1/1.7” format varifocal lens in the surveillance market today.
The CS mount lenses are available in manual, DC-auto versions; fully motorized, board and C mount versions are also available.
|Posted on 1 August, 2017 at 6:25||comments (1)|
CCTV security systems HD-CVI stands for High Definition Composite Video Interface. This is a brand new technology in the security camera industry that provides a different method of transmitting video signals over coaxial cables. Until this new technology surfaced, analog CCTV video was limited to 960h video resolution. 960h resolution refers to the 30% increase in horizontal resolution, so the maximum analog resolution up to this point was 960 x 480 pixels. This has been the accepted limit to analog video transmission for many years. In order to achieve greater transmission would mean switching to digital video using either HD-SDI (High Definition Serial Digital Interface) or Network IP video formats.
Enter HD-CVI, a true alternative to Network IP solutions. HD-CVI uses a licensed video transmitter and receiver that is able to transmit up to 1080p video resolution (1920 x 1080) in an uncompressed format over the same standard coaxial cable that is used for standard CCTV cameras. This uncompressed video format is able to transmit over longer distances than either HD-SDI or Network IP cameras and without the latency and bandwidth issues that are so common. Additionally, HD-CVI is able to transmit video, audio and control (OSD or PTZ) over a single coaxial cable instead of requiring separate cables for each transmission.
What is really separating this technology from the rest of the options for video transmission is the cost effectiveness of HD-CVI. In most cases HD-CVI is around the same price as the older analog CCTV technology and is far less expensive than HD-SDI or IP Network transmission.
CCTV cameras are limited to 960h resolution which is 960 x 480 pixels. HD-CVI cameras can transmit up to 1080p resolution (2 Megapixel) which is 1920 x 1080 pixels. HD-CVI is capable of up to 450% great resolution and detail than standard CCTV cameras and DVRs.
CCTV can only transmit video over the single coaxial cable. Audio and control must be run over separate cables. HD-CVI can transmit video, audio and control over a single cable saving money and time.
The price point of analog CCTV and HD-CVI is about the same. You get more resolution for the money with HD-CVI.
There are some benefits to IP cameras over HD-CVI cameras that should be considered as well:
CCTV security systems cameras are capable of higher resolution than 1080p and the available resolutions will continue to grow in the future.
IP cameras are capable of POE power so you can transmit both power and video on a single ethernet cable if using a POE camera and a POE switch.
An IP camera is a network device itself so it can function without the need for a network video recorder.
If there is an existing network infrastructure and available network bandwidth is not an issue, it can be easier to add additional IP cameras to an existing network.
Rhodium security camera systems is one of the pioneers of HD-CVI technology so if you are considering this technology we are the experts in the industry. This technology should be considered if you wish to upgrade an existing CCTV camera system to megapixel quality video. By simply replacing the existing analog cameras and the DVR with our cost effective HD-CVI cameras and DVR you will instantly upgrade your system to megapixel quality video producing an increase of up to 450% in resolution! There should be no need to replace the existing cable infrastructure which is usually the most expensive portion of the installation.
If you are considering a new security camera system, we highly recommend our HD-CVI systems since it will cost around the same as the analog CCTV security systems installed today. It can provide you with the same resolution as most IP Network camera systems for a fraction of the cost and without the bandwidth and latency issues experienced with network cameras.
If cost is not a factor at all, then we recommend you seriously consider an all IP network camera system since the ethernet cable infrastructure can be used over again in the future to upgrade your cameras as higher resolution cameras become more available. Keep in mind that IP camera systems usually require network expertise to ensure that you have adequate bandwidth available inside the network and to ensure that the network camera system does not negatively impact your existing network infrastructure.
Requirements for an HD CVI security camera system:
When planning the installation of a HD CVI surveillance system, make sure to consider all the parts that will be needed.
You will need to select your cable infrastructure:
The best choice for HD CVI video transmission is high quality RG6 or RG59. Most professional security system installers will chose Siamese cable since that will include both RG59 for video, audio and control transmission and 18 gauge power wire for power transmission in a single run. We have tested both copper core coax cable and CCA (Copper Clad Aluminum) Coax cable and both have performed well.
You can use CAT5 or CAT6 cable with the same video baluns you use for analog CCTV cameras. This infrastructure does perform well, but the quality of the video is slightly degraded. It is still a dramatic increase in resolution over the analog CCTV camera resolution. Most people will never notice the difference in video quality. We estimate the degradation in quality to be around 5-10%.
We have tested prefabricate plug and play cables. Again, the resolution is excellent, but the video quality is also slightly degraded. There is around the same 5-10% degradation, again barely noticeable to most people.
You will need to select your connectors:
The most popular connectors are BNC Twist on connectors because no tools are necessary. These will work fine.
BNC compression connectors is what most professional CCTV installers will use for the cable connection. This is also what we recommend.
BNC Crimp Ons are also popular and will perform very well.
Select your power source:
HD CVI can be powered the same way as analog CCTV cameras. Most HD CVI cameras will require either 12V DC or 24V AC power. You can choose from various power distribution boxes or easy plug in power transformers.
Select your recording DVR (Digital Video Recorder)
You will not be able to use your existing DVR (Digital Video Recorder) with the HD CVI cameras. Like HD-SDI and Network IP camera systems you will need to select an HD CVI DVR in order to be able to record your HD CVI cameras. We offer a wide range of HD-CVI DVRs and in most cases, the HD CVI DVRs are the same price of even less expensive than their equal standard CCTV DVR or NVR and they are less expensive than most HD SDI DVRs.
|Posted on 14 July, 2017 at 5:40||comments (1)|
Accoding to the statistics Victoria has become the nation's murder capital after a crime surge that saw the number of murders increase by nearly a third in the past year, the first large jump in five years.
The state has recorded more murders than NSW and Queensland in the past 12 months.
There were 66 murders in Victoria last year, according to the latest crime statistics, while NSW recorded 57 in the same period and Queensland had 51.
The murder rate had remained relatively stable in Victoria since 2011/12, with the number of killings hovering between 49 and 54 until the spike in 2015/16.
Victoria has been struggling with an escalation in gun violence in the past year but Police Minister Lisa Neville said deaths from firearms had decreased in the most recent figures.
Premier Daniel Andrews told reporters the increased crime rate was a trend that began six years ago. He described the latest figures as a "challenging set of crime statistics".
Mr Ashton said the homicide rate fluctuated over time but over the long-term tended to be stable. However, he said the homicide squad had experienced a very busy year.
Earlier this week, a man was charged with murder over a fatal daylight shooting at a busy shopping centre car park in Melbourne's north.
While the raw murder rate has not been adjusted for population growth, the "homicide and related offences" rate per 100,000 people was also up 17.3 per cent in Victoria last year.
Offences related to homicide include driving causing death, which climbed 26.2 per cent in the past year. It was also the first significant spike in that category in five years. Victoria's road toll has risen 16 per cent from last year.
The latest release from the Crime Statistics Agency shows Victoria's overall crime rate was up 13.4 per cent last year, with 535,826 offences committed in the 12 months to June.
Crime Statistics Agency Chief Statistician Fiona Dowsley said that while the total number of unique offenders had increased, there was a drop in the number of recorded offenders under the age of 25.
"Over the last year we have seen a four per cent drop in the number of offenders under 25, with the greatest change seen amongst 15 to 19-year-old offenders which dropped by 5 per cent," she said.
Police Association Assistant Secretary Bruce McKenzie said Victoria need a boost in police numbers to ensure it kept pace with population growth.
"On Grand Final week, we ought to be reflecting with pride on Victoria being the nation's sporting capital and not with shame as its undisputed crime capital," he said.
Opposition leader Matthew Guy said the latest statistics showed Victoria was being hit by a "crime tsunami".
"Make no mistake, these crime statistics are the result of Daniel Andrews' cuts to police, closing of police stations, and weakening of bail laws," he said.
In the past year there were 20 murders in South Australia, five in the Northern Territory and two in Tasmania. Western Australian and the ACT didn't state how many homicides were classified as murder.
Security cctv cameras and security footage will help to uncover these crimes Rhodium Security cameras will work together with Victorian police and Crime stoppers to make Melbourne Victoria a Best and safest place to live.
|Posted on 5 March, 2017 at 22:20||comments (0)|
wireless security cameras Internet Protocol (IP) addressing for Communicating with Computers, Switches, Bi-directional
Receivers, Encoders, Axis Video Servers, etc.
An IP Address is a Numerical I.D. for a computer or a device that communicates via a network. A Sub-net
Mask tells your computer or device which I.P. addresses are local to your network and where to send
information. Changing the IP address and sub-net mask of your computer allows you to communicate with the
device that you want to configure; like a switch. When a switch is new, it comes with the factory settings. In
order for it to communicate on our network, we have to re-configure its IP address and Sub-Net Mask to ones
that are suitable to our network. In order to do this, we must first (temporarily) modify our computer’s network
settings. Once we have changed our computer’s network settings, we can change the IP values of the switch.
To change the IP settings of the Switch, you must open the internet browser at the top of the computer screen
and enter the factory default IP address of the switch -Click ok. The switch will have a “home page” that will
allow you to navigate through its settings. At this time you can enter the switch’s name, location, IP address,
Subnet mask and the Ethernet Interface. Ethernet Interface refers to the switches ability to send and receive data
in either half duplex or full duplex. For example, in Half Duplex information can move in only one direction at
a time. In Full Duplex, information can be sent and received at the same time in both directions between
The Point of Security Cameras
If you already have a security system, it may seem redundant to also have security cameras.
After all, if a security system is supposed to keep out intruders in the first place, ideally, you
wouldn’t have to use cameras to catch any burglars. Unfortunately, intruders can still break
into your home, even when you have a security system. Beyond security surveillance, there are
many other uses for security cameras, such as seeing who’s at your door or checking up on kids
or pets. Let’s take a closer look at some of the instances in which security cameras have been
useful in theft cases.
Security Cameras at Work
In some cases, security cameras catch intruders right away, and in other cases it takes more
time and police investigation to catch an intruder. Here are a few examples in which home security
cameras have proven useful in catching and preventing burglary:
Catch doorstep thieves
In December, a UPS worker in Texas was
caught on a security camera stealing an iPad,
which was a father’s Christmas gift for his
daughter. This savvy dad, had installed a camera
to monitor his front door, and when he
later reviewed the footage, it was clear what
had happened. When UPS didn’t respond to
customer service calls, he posted the video on
YouTube, which got their attention, and ultimately,
the iPad was returned.1
Nab burglars almost
When you have a live camera feed that alerts
you when it senses motion, you may catch
burglars in the act. One day, New York City
resident Levent Centiner was sitting at his office
desk when he started receiving emails
with live images from his motion-activated
camera. Upon receiving the images, Centiner
called 911 and the burglar was caught then
and there. Centiner is now an open advocate
for everyone setting up security cameras in
|Posted on 15 February, 2017 at 20:35||comments (0)|
Crime statistics in Melbourne
Alleged offender incidents rhodium Security cameras
An alleged offender incident is an incident involving one or more offences to which an individual, business or organisation has been linked as an alleged offender. An alleged offender incident represents one alleged offender but may involve multiple victims and offences. One incident may involve offences that occur over a period of time but if processed by Victoria Police as one incident, it will have a count of one in the data presented in this section.http://www.securitycctvmelbourne.com.au/security-cameras
There may be multiple incidents within the reference period that involve the same individual, business or organisation. If there are multiple alleged offenders related to a criminal event, each will have their alleged offender incident counted once in the figures.
Where there were multiple offences recorded within the one incident, the incident is assigned an offence category of the most serious offence in the incident, known as the principal offence.
Security cameras in these sort of incidents help enormously to identify the offenders and these images from security cameras are evidence when stand traile.
|Posted on 7 February, 2017 at 20:05||comments (2)|
Casey council is recommending town control over programming at crowded public CCTV installation.
most effective way to fight growing number of crime in the casey council area including Cranbourne, Cranbourne east cctv cameras are nesses asset in terror and criminal activity tracking.
most trusted security company in casey council is Rhodium security cameras.
located in 28 banjo circuit lynbrook specialized in Security cameras security alarms and intercom systems furthermore for commercial asset shrinkage protection we have access control systems security tags and entering systems.
Comcast provides the studio at Concord-Carlisle High School and a staff of five full-time employees, and Whelan said the entire staff would become town employees under his recommendation
|Posted on 21 December, 2016 at 5:10||comments (2)|
The Importance of Home Security System
Why do we need a home security system?
Melbourne When you look at your family is number one, and your home, you know you want them to be safe and sound, always out of harms way. When you leave for work, or out you expect to come back to a smiling family, and to a home that is secure. But as they say, hope is not a strategy. The growing crime rates Melbourne infant in the world,across cities reflect the bitter reality. Many people overlook, ignore, and underestimate the need of taking appropriate home security measures.Rhodium security is the number one supplier of security solutions to Melbourne. A burglary or theft can lead to devastating consequences, both emotionally and financially. While the financial loss may be recoverable, the trauma inflicted on your family and yourself may last forever. So take a minute and think about this; is this loss worth.
It is proven that alarm systems help deter burglars. Another research conducted by the University of Melbourne proved that burglars would be hesitant to enter a home fitted with an alarm system. In fact, 31% burglars are likely to retreat from a home if they come across a security system. These figures reflect the effectiveness of home security systems and security camera systems.
Types of home security systems
There are many, many types of security systems for households and businesses. Typically, you will find major components such as a control panel, alarm, sensors, and detectors in a security system. Each component is integral to the system. You can opt for a wired security system or a wireless one, depending on your preference and budget. Some are Bosch, Hills, Honeywell, Tesla, paradox and more Rhodium security camera systems deal with most prestigious brads in the market.
DIY home security systems
In case of DIY security systems, all you have to do is follow the instructions that come with the kit. Most DIY security systems are wireless and easy to install. You can place sensors and detectors at main entry points such as doors, and windows.
How to choose
Choosing a security system for your home is probably the trickiest part of the whole process. Since there are so many companies out there, selecting the best one can be difficult. It is always recommended that you go for a firm that is well-recognized and ranked among the best Rhodium security has the experience and the knowledge to tackle the most copulated job.
When choosing a company, it is better that you first research a little, ask friends and family, and then make a well-informed decision.