The importance and problems of video surveillance systems?

December 28, 2019

The video surveillance system assumes the function of monitoring and recording in the technical defense system. Through real-time picture transmission of multiple cameras, the situation on the spot can be effectively monitored. The recording function helps to restore things, investigate and collect evidence.
1. The monitor screen is not clear
The banking system is a high-risk area. It requires entrances and exits to clearly show the facial features, physical features, etc. of entering and exiting personnel. The cash business area can clearly show the entire operation process of the staff and the facial features of the customer. The inventory room can clearly show complex points and play. The process of binding and other operations.
There are two reasons why the monitoring screen is not clear:
(1) The equipment is old or faulty
At present, the platform integrates monitoring screens of multiple bank branches and self-service banks, and their construction time varies from time to time. Most of the older spots have more serious mosaics, sawtooth, color distortion, stuck, frame skipping, and black screens. Therefore, in order to monitor the effective operation of the system, equipment should be regularly maintained to check and replace old and damaged equipment.
(2) Influence of ambient light conditions
On the one hand, some banks use non-infrared cameras due to certain areas, such as waiting rooms for customers, which are closed at night. When an incident such as an intrusion alarm occurs at night, linked video screens do not associate with the lighting system and the screen cannot be identified. Therefore, infrared cameras or linked lighting systems are recommended; on the other hand, some cameras in the hall entrances, counters, or self-service equipment are more serious. The phenomenon of backlighting. Due to strong outside light, the screen cannot recognize the person's facial or physical features. Therefore, when installing the camera, you should pay attention to the angle, avoid the backlight, and enhance the indoor illumination. Use cameras with backlight compensation or wide dynamic technology as much as possible.
2. The screen time is not synchronized
By using time as a leader, the process of an event and the condition of the scene can be completely reproduced through a plurality of recording frames. However, in actual projects, most of the picture time is not uniform and there are large differences. At present, most systems use time synchronization with local computers or manual manual timekeeping, and there are no periodical hours. When the event is detected by looking up the monitoring record, it takes a lot of time and effort to find the time difference between the pictures, which seriously reduces the efficiency of forensics. Therefore, it is recommended to configure the school server. All subsystems are unified with the school server. The time error between devices in the system should be less than 10s, the error between the system and Beijing standard time should be less than 30s, and the time period of the school should not exceed 24 hours.
3 operation password area without shielding
Cameras on some self-service devices can see the user's password input operation or even the password keyboard at close range due to factors such as installation position and angle. In order to prevent the leakage of personal privacy, the password operation area should be shielded. It is recommended to use the video area occlusion function to completely block password operations.
4. Loss of video signal and no alarm function
When there are many monitoring screens, video surveillance is generally used for monitoring. When an incident occurs, if criminals intentionally damage the camera or block the screen, and no video alarm function is found in time, it will be difficult to gather evidence afterwards. At present, there have been many cases in which such situations occur. After the case is collected, the on-site camera screen is lost or the device fails. When the same phenomenon occurs multiple times, it is no longer a matter of chance. Obviously, criminals are targeted. Therefore, this function should be configured. When the video signal is lost or the screen is blocked, an alert is issued. The personnel are promptly arranged to conduct maintenance inspections. At the same time, other monitoring screens are retrieved to confirm the site conditions.
5. No alarm pre-record function
The monitoring system uses 24 hours of uninterrupted recording, and automatically generates multiple video files based on the size of the file or the time period. When forensics, it is necessary to determine the time when the event occurred. Use the playback function search time to find the corresponding video file, and then play the corresponding video file to find the record when the event occurs by means of fast forward or dragging. If the alarm system time and the monitoring system are sometimes poor, it will take more time and effort to search through the above methods. Therefore, it is recommended to set the alarm pre-recording function. You can quickly retrieve the pre-recorded screen to determine the time and process of the event through the alarm information query function. At the same time to record as much as possible the occurrence of an alarm event, the pre-recorded time should be greater than 10s.
6. Playback search conditions no alarm information
The playback function mostly retrieves video and audio data through the conditions of date, time, and channel address, but ignores the alarm information retrieval function. In addition to quick access to on-site video records through alarm events, statistical analysis can be performed on alarm-prone or prone areas to allow for more security arrangements later.
7. Incomplete video recording of armored parking area and money transfer handover
Most monitoring systems have a complete monitoring and recording of the process of entering into the building after the cassette, but neglect the monitoring of the parking of the armored car and the loading and unloading of the cassette. The environmental monitoring cameras should be supplemented to monitor and record the process of docking the armored car and the loading and unloading of the money box and the non-blind area of ​​the surrounding environment.
When the self-service equipment and self-service bank operate in the plus-cash box and the cash loading area, it is recommended that the alarm be triggered and the animation be uploaded to the monitoring center at the same time. The on-duty personnel confirms the operator and observes whether there is any hidden danger in the surrounding situation. If there are special circumstances, the operator is notified in time.

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Technical Data:

Model No. TTAC-07HCWa TTAC-07HCWa TTAC-12HCWaS TTAC-12HCWaS TTAC-18HCWaS TTAC-18HCWaS TTAC-40HCWaS TTAC-70HCWaS
Type Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Horizontal
Cooling capacity kW 7.00 7.00 12.00 12.00 18.00 18.00 40.00 70.00
Heating capacity  kW 7.70 7.70 13.50 13.50 19.50 19.50 45.00 77.00
Electric Heating kW 3.00 3.00 4.00 4.00 6.00 6.00 8.00 15.00
Rated cooling power input W 2550 2550 4150 4150 7000 7000 17500 30200
Rated heating power input W 2650 2650 4450 4450 8500 8500 18500 31400
Rated cooling current input A 12.2A 12.2A 7A 7A 11.7A 11.7A 29.5A 51.1A
Rated heating current input A 12.7A 12.7A 7.5A 7.5A 13.2A 13.2A 31.2A 53.0A
Evaporating side airflow m3h 1000 1000 2000 2000 3000 3000 5500 5500
Condensing side airflow m3h 3500 3500 5000 5000 10000 10000 22000 22000
Air pressure Pa 200 200 200 200 200 200 200 200
Compressor MFG GMCC GMCC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC
Evaporating side Noise dB(A) ≤40   ≤40   ≤45   ≤45   ≤48   ≤48   ≤52   ≤52  
Condensing side Noise dB(A) ≤55   ≤55   ≤60   ≤60   ≤65   ≤65   ≤70   ≤72
Net Weight kg 110 125 180 200 250 260 380 780
Dimension  (L x W x H))  mm 1150×710×820 740*620*1120  1280×930×1000 835*735*1275 1400×1080×980 930*850*1380 2100*1100*1210 2800*2100*1210



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