Video surveillance system equipment includes: cameras (capture images), digital hard disk recorders (storage, display images), matrix (image switching and image control), TV wall (image display);
Intrusion alarm system equipment includes: alarm detectors (detecting intruders information), alarm host (receiving alarm signals), alarm (in response to alarm signals);
I. What are the categories of surveillance camera series?
1, economic road surveillance cameras: ES500-7683C
2, electronic police cameras: ES500-7783C, ES500-7783E
3, the third generation of ultra-wide dynamic cameras: ES500-7643C
4, intelligent road surveillance cameras: ES500-78583C
4, smart road surveillance cameras: ES500- 78583C
5, infrared night vision gun camera 6, infrared zoom integrated camera 7, infrared external focus camera
8, infrared conch camera 9, infrared vandalism conch camera 10, color vandalism hemisphere camera
11, color low-light large dome camera 12, color large hemisphere camera 13, color hemisphere camera
14, high-definition zoom three-axis hemisphere 15, mini vandalism high-speed ball 16, integrated camera
17, intelligent high-speed ball 18, intelligent constant-speed ball 19, intelligent medium-speed ball
20, network cameras 21, special cameras 22, vehicle-mounted hard disk recorders
23, PC-based hard disk recorders 24, network video servers 25, Embedded hard disk recorder
26, small and medium-sized matrix controller 27, large matrix controller
Two, the basic knowledge
1, CCD is what?
It is the image sensor (image sensor), is a high sensitivity semiconductor made. Can be converted into light charge, and then through the analog/digital converter chip will convert the electronic signal into a digital signal, after compression and processing transmission to the computer to display the captured image. Most 1/3 and 1/4 sizes on the market today.
2. What does the horizontal resolution of 420TVL mean?
It is in the horizontal direction there are 420 lines vertically distributed, TVL means TV line, TVL to line imaging. Is the clarity of the numerical value, the higher that the clearer, 500 lines is already very high definition, general 420-480 can be. Unless it is a special area, the need for clarity is very high.
3, high-speed ball, medium-speed ball, constant-speed ball turn a circle about how much time constant-speed ball turn a circle about how much time?
High-speed ball-30 seconds or so, medium-speed ball-30-50 seconds or so, constant-speed ball-40-60 seconds or so
High-speed ball and medium-speed ball are the same, can be controlled by variable speed. Medium speed ball is 60°~120°/s, high speed ball is more than 120°/s. Uniform speed ball can be understood as constant speed ball or speed ball, which can't be controlled by variable speed and can only be controlled by constant speed, which is below 15°/s.
4, the larger the focal length - the smaller the field of view angle - the clearer the image - small range
The smaller the focal length - the larger the field of view angle - the less clear the image - large range < /p>
5. What is the difference between optical zoom and electronic magnification?
Optical zoom: is usually said to adjust the focal length, refers to the lens and the CCD (image sensor) distance adjustment
Electronic magnification: refers to the existing picture, image through the computer or other equipment will be enlarged, but the focal length remains unchanged
6, the CCD currently have what brand?
SONY-Sony, HITAACHI-Hitachi, LG, CNB
7, DC, AC means what?
DC-Direct Current AC-Alternating Current
8, what is the signal-to-noise ratio?
It is the ratio of signal to noise of the camera output image signal. The larger the ratio, the less noise interference presented on the image, the higher the image quality. It should generally be greater than 45db or more.
9, dvr/hvr/nvr/ipcam
Embedded high-definition hybrid DVR HVR, embedded network DVR NVR, embedded digital hard disk recorder DVR, network camera ipcam
10, color-to-black camera
Also known as the day-night conversion camera, it is the camera in the daytime and at night are able to The use of the camera. As in engineering applications, we often find that black and white cameras have a higher sensitivity than color cameras, you can get a good image in darker environments, especially in the use of infrared light source with the use of more can be done 0LUX, so that the color to black camera for day and night cameras.
In sales often encountered customer problems
1, first ask the customer's project, according to the project to give him a reasonable choice of high-speed ball: ask the project to use the occasion, the general large-scale projects, airports, customs, traffic police, museums, etc. are used in high-grade high-speed ball, built-in all-in-one machine at the same time are used in the best all-in-one machine. Then the general factories, schools, hospitals, buildings, etc. are used in the mid-range or mid-range below the high-speed ball, and supermarkets or neighborhoods are used in the cheaper high-speed ball or low-speed ball.
2, ask the installation location of the monitoring range, different installation locations to choose the built-in camera center is not the same, the installation is not the same. General indoor high-speed ball using pure color all-in-one, zoom range is smaller, the starting focal length is smaller, especially with a wide-angle lens of the all-in-one, such as the use of 16 times LG, 18 times sony's, 22 times Hitachi's, 22 times the Shihlin's and so on. Indoor ball is generally according to the customer site, using indoor wall hanging, boom hanging, indoor surface ceiling, embedded ceiling and so on. Outdoor high-speed ball is generally used in color low-light or color-to-black all-in-one, and generally better quality all-in-one, such as the use of LG22 times, 27 times, Shihlin 22 times, sony 18 times, sony 26 times, Hitachi 23 times, such as color-to-black all-in-one movement. According to the customer's situation, choose the all-in-one machine movement with different price point.
3, the customer to buy, pay attention to consider the host of matching problems, ask the host of the control protocol, if not match to prepare the protocol converter.
4, high-speed ball is most likely to damage the problem: the customer's wiring is not good, waterproof did not deal with water, lightning burned, the ball machine itself.
5, the use of high-speed ball occasions: intersections where traffic is more concentrated, tracking the activities of the target place, the target area needs to zoom zoom places, the need to link the alarm video places.
6, high-speed ball installation environment, whether there is light, whether 24-hour continuous monitoring, whether the light is strong, the surrounding temperature is also an important factor in some areas of the north, due to the temperature difference between day and night is too large, it is easy to form a water droplet condensation inside the dome!
Typical applications of high-speed ball
An important application of high-speed ball is the highway, urban intersection monitoring, mainly on the road and the intersection of pedestrians and vehicles to monitor and record the situation of the occurrence of public security cases and other accidents quickly reflect, but also for special pedestrians and vehicles tracking and positioning, as well as after the incident investigation and evidence collection.
Another application of the high-speed ball camera is in the highway toll plaza, mainly on the entire toll plaza comprehensive scene monitoring and recording, you can keep abreast of the whole toll station events, to facilitate the management of the rapid response, and important people and objects tracking and positioning.
Generally the high-speed ball operation and control through the control keyboard, hard disk recorders (DVR), network video servers and matrix and some computer software to achieve.
High-speed ball advantages:
1. Because the high-speed ball can realize 360 continuous monitoring
So at an intersection with a high-speed ball can achieve a full range of monitoring, high-speed ball high-speed rotation function makes the monitoring staff can be very good to capture the required video. It is worth mentioning that the mainstream high-speed ball manufacturers provide high-speed ball focal length and rotation speed automatic matching technology, so that the ball machine whether in the case of large zoom or small zoom rotation can provide stable video effect, this point in the close-up close-up monitoring of the situation the advantage is very obvious.
2. High-speed ball can be realized between the two points of the scanning monitoring
Used to monitor a fixed area, but also in a few intersections between the point to do switching monitoring, or the user to set up their own monitoring routes and speed, so that the cycle of monitoring. For Jiuding high-speed dome with watchdog function, when no one is in control, the watchdog function can be enabled automatically to monitor and cruise according to the set way.
3.Combining with the alarm equipment at the intersection
When encountering an alarm, the alarm function of the JD High Speed Dome realizes video linkage and output linkage, realizing a quick response to the alarm.
4. 24-hour all-weather monitoring
The use of high-speed dome with built-in color-to-black low-light function camera enables better monitoring effect even at night.
5. Traffic monitoring and diversion
Through the system will monitor the area of the scene image transmitted back to the command center, so that managers can directly grasp the vehicle queues, blockages, signals, and other traffic conditions, and timely adjustment of the signal timing or through other means to divert traffic, change the distribution of the traffic flow, in order to alleviate the purpose of the traffic congestion, the violation of the vehicle tracking
Color to black camera is also known as the daytime black camera, which is also called a low-light function camera, can also achieve a better monitoring effect at night. >Color to black camera is also called day and night conversion camera, is in the day and night can be used in the camera. As in engineering applications, we often find that black and white cameras have a higher sensitivity than color cameras, you can get a good image in darker environments, especially in the use of infrared light source with the use of more can be done 0LUX, so the color to black camera for day and night cameras.
Security products are divided into ten categories
1. Intrusion detectors: active infrared intrusion detector, passive infrared intrusion detector, microwave intrusion detector, microwave and passive infrared intrusion detector, ultrasonic intrusion detector, vibration intrusion detector, magnetic switch intrusion detector, ultrasonic and passive infrared intrusion detector.
2. Burglar alarm controllers: containing wire, wireless burglar alarm control, transmission, display, storage and other equipment.
3. Vehicle anti-theft alarm system: contains vehicle anti-theft alarm equipment and vehicle anti-robbery anti-theft alarm networking system.
4. Alarm system access control equipment: including target identification, information processing, control, implementation of equipment and systems. This category of products mainly refers to system products, in addition to electronic locks other single product such as IC cards, fingerprint locks are not included.
5. Anti-theft safes: including anti-theft safes, anti-theft safes, portable anti-theft safes.
6. Mechanical anti-theft locks: including special locks for anti-theft security doors, vault doors, anti-theft safes (cabinets), motor vehicle anti-theft.
7. Building and apartment intercom system: including all kinds of visual and non-visual building and apartment intercom equipment and systems.
8. anti-theft security doors: including anti-theft security doors, building apartment electronically controlled security doors, vault doors.
9. Bulletproof composite glass: including bulletproof, anti-vandalism glass.
10. Alarm system video monitoring equipment: including hard disk recording and transmission equipment.
Surveillance Equipment Basics and Installation
Surveillance system installation first decide whether the existing computer with a surveillance card, or embedded hard disk recorders do your monitoring host. Using a computer to install the monitoring card, the overall investment is relatively low, suitable for familiar with the computer installation, have a professional staff on duty, the functional requirements of more places. The computer needs to be turned on 24 hours a day; the use of embedded DVR does not require specialized knowledge, does not need to be guarded, the operation is very simple, as convenient as the use of VCDs; Secondly, the installation of surveillance equipment needs to determine how many cameras to be installed, and to determine the scope of each camera's surveillance and image quality. First decide to monitor the number of cameras, and then according to the specific situation to determine the camera's lens monitoring range: it must be clear that the camera to the monitoring point of the distance and the need to monitor the area, as for the clarity, we believe that: 480 TV lines of the camera has been sufficient. Third: whether to have night vision. If your monitoring equipment is installed in corridors, foyers, aisles, warehouses and other dark places, you can consider infrared night vision function of the camera, it should be noted that the infrared camera in addition to professional night vision or special order, infrared cameras also need to be on-site with lighting to assist the five fingers of the conditions of the infrared distance will be exponentially shortened. Site if the garden lawn, infrared effect is worse. Fourth: is the direct wiring or wireless transmission to install. In addition to the expensive price, the wireless network does save the camera installation trouble and unattractive, but need to pay attention to the distance and obstacles. In principle, cement building materials will shorten the transmission distance of wireless, metal materials will completely block the wireless signal, transmitter (at the camera end) and receiver (at the host end) to be far away from other electrical appliances in order to avoid interference, such as the use of wireless networks, we must have a burden of more than twice the price of the monitoring equipment. We recommend that unless necessary, try to use wired transmission to install. Fifth: site monitoring and network monitoring you to determine the monitoring system installation, to consider whether the need for network functionality, that is, if you need to monitor the site at any time in the Internet monitoring and control, you need to choose a network function of the monitoring host. Avoid the installation but no network transmission function.Analog cameras:
The entire video surveillance system is divided into front-end video capture equipment, mid-range transmission processing equipment and back-end display and viewing equipment. We said that the analog camera belongs to the front-end video capture device, analog camera output is an analog video signal, through the encoder can be generated by the video capture device analog video signal into a digital signal, and then stored in the computer. The video signal captured by the analog camera must be converted to digital mode by a specific video capture card, and compressed before it can be converted to a computer.
Features:
1, ease of use
Analog cameras: closed-circuit, can only be monitored internally, not remotely.
2, practicality
Analog cameras: video data can only be stored locally, and can not be viewed remotely, not easy to be destroyed by lawbreakers.
3, integration
Analog cameras: analog cameras to be with the DVR (Digital Video Recorder means Digital Video Recorder, if only literally to understand, it does not specify the recording media is a tape or hard disk.) Connected to the DVR, DVR has a certain limit on the number of roads, DVR connected to the full, and then increase the camera to increase the cost of hardware.
4, installation
Analog cameras: the coaxial cable to each camera, and connected to the control platform, recording equipment, display equipment. Each additional way has to be rewired, and there is no existing network to utilize.
5, remote
analog cameras: only local viewing images for management.
6, scalability
Analog cameras: expansion is very difficult, each analog camera needs to have a special cable, when the use of long cables will affect the image quality.
7, the cost
analog cameras: coaxial cable is very expensive, commonly used RG59 750hms standard coaxial cable than high-quality network cable is 30% to 40% more expensive. Each analog camera requires a heel of cable, and if there are many cameras, you must buy many cables and spend money specifically for the installation and deployment of these cables. Labor and maintenance costs are higher, and in addition the cost of building the system will include the cost of analog cameras, video recorders and tapes.
Network high-speed ball and analog high-speed ball: 1, network high-speed ball: the output when the network digital signal, through the network cable and computer connected to the IP address of the network ball, you can open the monitoring interface to control.
2, analog high-speed ball: need a video capture card (software supporting), and a RS232 to RS485 module. Capture card is mainly responsible for the acquisition of video signals, software to complete the image processing and ball control, 232/485 code transfer module is responsible for the computer through the 232 interface output control signals converted to 485 control signals, to control the ball!