What are the sales knowledge and skills of security monitoring?

Security mainly includes six subsystems: video monitoring system, intrusion alarm system, access control system, electronic patrol system, explosion-proof system and visual intercom system.

The equipment of video monitoring system includes: video camera (image acquisition), digital hard disk video recorder (image storage and display), matrix (image switching and image control) and TV wall (image display);

Intrusion alarm system equipment includes: alarm detector (detecting intruder information), alarm host (receiving alarm signal) and alarm signal (responding to alarm signal);

1. What are the categories of surveillance camera series?

1. economical road monitoring camera: ES500-7683C.

2. Electronic police cameras: ES500-7783C, ES500-7783E.

3. The third generation ultra-wide dynamic camera: ES500-7643C.

4. Intelligent road monitoring camera: ES500-78583C

5. Infrared night vision gun camera 6, infrared zoom integrated camera 7, infrared external focusing camera

8, infrared conch camera 9, infrared riot conch camera 10, color riot hemisphere camera

1 1, color low-light hemisphere camera 12, color hemisphere camera 13, color hemisphere camera.

14, high-definition zoom triaxial hemisphere 15, mini riot ball 16, integrated camera.

17, intelligent high-speed ball 18, intelligent constant-speed ball 19, intelligent medium-speed ball.

20. Webcam 2 1, dedicated camera 22, car hard disk video recorder.

23.PC-type hard disk video recorder 24, network video server 25 and embedded hard disk video recorder.

26, small and medium-sized matrix controller 27, large matrix controller

Second, the basic common sense

1, what is CCD?

Is an image sensor, made of high-sensitivity semiconductor. Light can be converted into electric charge, and then the electric signal is converted into digital signal through the analog-to-digital conversion chip, which is compressed and transmitted to the computer to display the collected image. At present, most specifications of 1/3 and 1/4 on the market.

What does the horizontal resolution of 2.420TVL mean?

That is to say, there are 420 vertically distributed lines in the horizontal direction, TVL stands for TV line, and TVL images are represented by lines. It is the value of clarity. The higher it is, the clearer it is. The 500-line is already high definition, and generally 420-480 is enough. Unless it is a special area, there is a high definition.

3. How long does it take for a high speed ball, a medium speed ball and a constant speed ball to make one turn?

High speed ball -30 seconds, medium speed ball -30-50 seconds, constant speed ball -40-60 seconds.

The high-speed ball, like the medium-speed ball, can be controlled at variable speed. The rotation speed of the medium-speed ball is 60 ~ 120/s, and the rotation speed of the high-speed ball is above 120/s. A uniform ball can be understood as a constant-speed ball or a speed ball. It can only be controlled at a constant speed, and the rotation speed is below15/s.

4. The greater the focal length-the smaller the viewing angle-the clearer the image-the smaller the range.

The smaller the focal length-the larger the viewing angle-the less clear the image-the larger the range.

5. What's the difference between optical zoom and electronic amplification?

Optical zoom: commonly known as focal length adjustment, refers to the adjustment of the distance between the lens and CCD (image sensor)

Electronic amplification: refers to the use of computers or other equipment to enlarge existing pictures and images, but the focal length remains the same.

6. What brand does 6.CCD have at present?

Sony Sony, Hitachi Hitachi, LG, CNB

7. What do 7.DC and AC stand for?

DC-DC-AC

8. What is the signal-to-noise ratio?

Refers to the signal-to-noise ratio of the image signal output by the camera. The larger the ratio, the smaller the noise interference to the image and the higher the image quality. Generally, it should be above 45db.

9、dvr/hvr/nvr/ipcam

Embedded high-definition hybrid hard disk video recorder HVR, embedded network hard disk video recorder NVR, embedded digital hard disk video recorder DVR, network camera ipcam.

10, color to black camera

Also known as the day-night switching camera, it is a camera that can be used both during the day and at night. In engineering applications, we often find that black-and-white cameras have higher sensitivity than color cameras, and can get good images in dark environment, especially when infrared light sources are used together, which can reach 0LUX. Therefore, color-to-black cameras are called day and night cameras.

Customer problems often encountered in sales.

1. Ask the customer about the project first, and choose a reasonable high-speed ball for him according to the project situation: ask about the application occasions of the project, usually large-scale projects, airports, customs, traffic police, museums, etc. All use advanced high-speed balls, and the built-in all-in-one machines use the best. Then, factories, schools, hospitals, buildings, etc. Generally, high-speed balls in the middle and low range are used, and relatively cheap high-speed balls or low-speed balls are used in supermarkets or communities.

2. Ask about the monitoring range of the installation location. Different installation locations choose different built-in camera cores and different installation methods. Indoor high-speed balls generally use solid color all-in-one machines, which have smaller zoom range and smaller initial focal length, especially all-in-one machines with wide-angle lenses, such as 16 times LG, 18 times Sony, 22 times Hitachi and 22 times Shilin. Generally, according to the customer's site conditions, indoor balls include wall hanging, suspender hanging, indoor ceiling and embedded ceiling. Outdoor high-speed balls generally use all-in-one machines with low illumination or black color, and generally use all-in-one machines with good quality, such as LG22 times, 27 times, Shilin 22 times, sony 18 times, sony26 times and Hitachi 23 times. According to the customer's situation, choose all-in-one movements with different prices.

3. Customers should pay attention to the matching of the host when purchasing, ask about the control protocol of the host, and prepare a protocol converter if it doesn't match.

4. The most common damage problems of high-speed balls: improper wiring by customers, improper waterproof treatment leading to water ingress, lightning damage, and problems of the ball machine itself.

5. Use occasions of the high-speed ball: places where people at intersections are relatively concentrated, places where moving targets are tracked, places where the target area needs to be enlarged and reduced, and places where alarm videos need to be linked.

6. The installation environment of the high-speed ball, whether there is light, whether it is continuously monitored for 24 hours, whether there is strong light, and the ambient temperature are also important factors. In some areas in the north, due to the large temperature difference between day and night, water droplets are easily condensed inside the ball cover!

Typical application of high-speed ball

At present, an important application of high-speed ball is highway and urban intersection monitoring, which mainly monitors and records pedestrians and vehicles on roads and intersections, quickly reflects accidents such as public security cases, and can also track and locate special pedestrians and vehicles for investigation and evidence collection afterwards.

Another application of high-speed ball camera is in the toll station square of expressway, which mainly monitors and records the whole scene of the whole toll station square, so as to know the events of the whole toll station in time, which is convenient for managers to reflect quickly and track and locate important people and things.

Generally speaking, the operation and control of high-speed ball should be realized by controlling keyboard, DVR, network video server, matrix and some computer software.

Advantages of high-speed ball:

1. Because the high-speed ball can realize 360 continuous monitoring.

Therefore, the high-speed ball can be used to realize all-round monitoring of intersections, and the high-speed rotation function of the high-speed ball enables the monitoring personnel to capture the required video well. It is worth mentioning that at present, the mainstream high-speed ball manufacturers have provided the technology of automatically matching the focal length and rotational speed of high-speed balls, which makes the ball machine provide stable video effects regardless of whether it rotates under large zoom or small zoom, and has obvious advantages in the case of close monitoring.

2. The high-speed ball can realize scanning monitoring between two points.

It can be used to monitor a fixed area and switch between several intersections, or users can set their own monitoring route and speed to make it monitor circularly. For Jiuding high-speed ball with satellite position function, when no one controls it, it can automatically turn on the satellite position function, and monitor and cruise in a set way.

3. Combined with the alarm equipment at the intersection

When an alarm occurs, video linkage and output linkage are realized through the alarm function of Jiuding high-speed ball to realize rapid alarm response.

24-hour all-weather monitoring

The high-speed ball with built-in camera has the function of low illumination from color to black, which can achieve better monitoring effect at night.

5. Traffic monitoring and guidance

Through this system, the scene image of the monitoring area is transmitted back to the command center, so that managers can directly grasp the traffic conditions such as vehicle queuing, congestion, signal lights and so on. Adjust signal timing in time or divert traffic by other means to change the distribution of traffic flow, so as to alleviate traffic congestion and automatically track illegal vehicles.

Color-to-black camera, also known as day-to-night conversion camera, is a kind of camera that can be used both during the day and at night. In engineering applications, we often find that black-and-white cameras have higher sensitivity than color cameras, and can get good images in dark environment, especially when infrared light sources are used together, which can reach 0LUX. Therefore, color-to-black cameras are called day and night cameras.

Security products are divided into ten categories.

1. Intrusion detectors: including active infrared intrusion detectors, passive infrared intrusion detectors, microwave intrusion detectors, microwave and passive infrared intrusion detectors, ultrasonic intrusion detectors, vibration intrusion detectors, magnetic switch intrusion detectors, ultrasonic and passive infrared intrusion detectors.

2. Anti-theft alarm controller: including wired and wireless anti-theft alarm control, transmission, display, storage and other equipment.

3. Vehicle anti-theft alarm system: including vehicle anti-theft alarm equipment and vehicle anti-robbery anti-theft alarm networking system.

4. Entrance and exit control equipment of alarm system: including equipment and systems for target identification, information processing, control and execution. This kind of products mainly refers to system products, and other items, such as IC cards and fingerprint locks, are not included for the time being.

5. Anti-theft safes: including anti-theft safes, anti-theft safes and portable anti-theft safes.

6. Mechanical anti-theft locks: including anti-theft safety doors, vaults, anti-theft safes (cabinets) and special locks for motor vehicles.

7. Building intercom system: including all kinds of visual and non-visual building intercom equipment and systems.

8. Anti-theft and anti-theft door: including anti-theft and anti-theft door, building electric anti-theft door and vault door.

9. Bulletproof composite glass: It contains bullet-proof and damage-proof glass.

10. Alarm system video monitoring equipment: including hard disk video recording and transmission equipment.

Basic knowledge and installation of monitoring equipment

The installation of the monitoring system first determines whether the existing computer is equipped with a monitoring card or an embedded hard disk video recorder is your monitoring host. The overall investment of installing the monitoring card by computer is low, which is suitable for places familiar with computer installation, with professionals on duty and more functional requirements. The computer needs to be turned on 24 hours; Using embedded hard disk video recorder does not need professional knowledge and duty, and the operation is very simple, just like using VCD.

Secondly, the installation of monitoring equipment needs to determine how many cameras to install, and determine the monitoring range and image quality of each camera. First, determine the number of cameras to be monitored, and then determine the scope of camera lens monitoring according to the specific situation: the distance from the camera to the monitoring point and the area to be monitored must be clear. As for clarity, we think the camera of 480 TV line is enough.

Third: Do you want night vision? If your monitoring equipment is installed in corridors, hallways, aisles, warehouses and other dark places, you can consider a camera with infrared night vision function. It should be noted that the infrared distance will be doubled, except for professional night vision or special customization. If the scene is a garden lawn, the infrared effect is even worse.

Fourth: whether it is direct wiring installation or wireless transmission installation. In addition to the high price, wireless network does save the trouble and ugliness of camera installation, but we need to pay attention to the problems of distance and obstacles. In principle, cement building materials will shorten the wireless transmission distance, and metal materials will completely shield wireless signals. The transmitter (on the camera side) and receiver (on the host side) should be far away from other electrical appliances to avoid interference. If you want to use a wireless network, you must have monitoring equipment that costs more than twice as much. Unless necessary, we recommend using wired transmission for installation as much as possible.

Fifth: Site monitoring and network monitoring When determining the installation of monitoring system, we should consider whether network function is needed. That is to say, if we need to monitor and control the monitoring site on the Internet at any time, we need to choose a monitoring host with network function. Avoid installing the function of no network transmission.

Analog camera:

The whole video monitoring system is divided into front-end video acquisition equipment, middle-end transmission and processing equipment and back-end display and viewing equipment. The analog camera we are talking about belongs to the front-end video acquisition equipment. The analog video signal output by an analog camera can be converted into a digital signal by an encoder and then stored in a computer. The video signal captured by analog camera must be converted into digital mode by special video acquisition card and compressed before it can be converted into computer.

Features:

1, easy to use

Analog camera: closed circuit, only internal monitoring, not remote monitoring.

Step 2 be practical

Analog camera: video data can only be stored locally, not viewed remotely, and it is not easy to be destroyed by criminals.

Step 3 synthesize

Analog camera: An analog camera should be the same as a DVR. Literally, it does not mean that the recording medium is a tape or a hard disk. ), the number of DVR channels is limited. After the DVR is full, adding another camera will increase the cost of hardware.

4. Device

Analog camera: Connect the coaxial cable to each camera and connect it to the control platform, video recording equipment and display equipment. Every time a route is added, it needs to be rerouted, and there is no ready-made network available.

5. Distant

Analog camera: you can only watch images locally for management.

6. Expansibility

Analog camera: It is very difficult to expand the work. Each analog camera needs a dedicated cable. Using a long cable will affect the image quality.

7. expenses

Analog camera: Coaxial cable is very expensive. The commonly used RG59 750hms standard coaxial cable is 30% to 40% more expensive than the high-quality network cable. Each analog camera needs a cable. If there are many cameras, you must buy many cables and spend money to install and deploy them. Manpower and maintenance costs are high, and the system construction costs will also include the costs of analog cameras, video recorders and videotapes.

Network high-speed ball and simulated high-speed ball: 1. Network high-speed ball: when outputting, the network digital signal is connected to the computer through the network cable, and the IP address of the network ball machine is logged in, and the monitoring interface is opened for control.

2. Simulation of high-speed ball: You need a video capture card (equipped with software) and a module from RS232 to RS485. The acquisition card is mainly responsible for collecting video signals, the software completes image processing and ball machine control, and the 232/485 code conversion module is responsible for converting the control signals output through the computer 232 interface into 485 control signals to control the ball machine!