Video surveillance cameras are widely used in OHWOAI and are accompanied by various failure problems. Solving these failures is very important to improve the quality of the surveillance camera system and ensure the stable operation of the system. Below are 10 common failure points of video surveillance camera systems and our experience in dealing with them, based on personal engineering experience.
1. Short circuit problem:
In a video surveillance camera system, there are many connection cables between devices, and if the connection cables of major devices are inappropriate and have connection errors, problems such as disconnection, short circuit, poor insulation, and misconnection may occur, which may cause the performance degradation or damage of the device. To solve this problem, it is very important to calmly analyze and clarify the faulty line and the possible fault phenomenon, and further ensure the connection of various cables so that each system device is suitable for long-term operation. OHWOAI's wireless solar panel type and POE power supply security camera can be monitored remotely with multiple devices. After connecting the recorder and router with an LAN cable and installing the app, you can monitor, watch, and talk with your family on various devices such as tablets, smartphones, and computers outside.
2. Interference issues:
Impedance mismatch will cause the monitor screen to show evenly spaced vertical stripe interference, and the frequency of the interference signal is usually an integer multiple of the line frequency. This kind of interference is usually caused by the impedance and distribution parameters of the video cable not meeting the requirements. To solve this problem, ensure that the impedance of each device in the system is consistent as much as possible, pay special attention to the cable quality when selecting video cables, and carry out sample testing of the cable if necessary. OHWOAI's wireless solar panel and POE powered security camera is equipped with a unique double WIFI antenna to improve the WIFI signal reception function. After connecting with WIFI, the image is stable and the call can be heard clearly.
3. Interface or communication protocol issues:
This problem frequently occurs between devices that have a communication control relationship, such as a control host and a decoder or a control keyboard. It usually occurs because parameters such as the communication protocol are not set correctly during the engineering installation process. To solve this problem, you need to make sure that you set the communication protocol parameters of devices such as the control host, decoder, and control keyboard correctly during installation.
4. Common problems with video interfaces:
1) 50Hz net frequency interference: black or white stripes appear on the monitor screen, scrolling up and down. This is usually caused by improper grounding of the front-end device and the control center device, which causes a potential difference loop to enter the system. It may also be caused by poor power performance of the device itself.
2) Noise white snow: Snow-like noise appears in the image, which is usually caused by signal attenuation and high-frequency noise in the signal transmission line.
3) Image overlap, whiteness, character vibration, stripe interference: These problems usually occur because the characteristic impedance of the video transmission line or between devices is not 75Ω, which is caused by impedance mismatch. To solve these problems, you need to ensure the quality of the line and impedance match.
5.Failure of devices related to the power supplied:
1) The power supply or voltage is incorrect.
2) Insufficient power or wire diameter of a particular power line causing large voltage drop.
3) There are problems with the power supply system's transmission lines, such as short circuits, disconnections, and momentary overvoltages.
Any power error or momentary overvoltage can cause damage to the device, so careful checking and inspection before applying power is necessary and should not be taken lightly.
6. Spatial radiation noise disturbances introduced by transmission lines:
This kind of interference is usually caused by the presence of a strong and high-frequency spatial radiation source near the transmission system, front-end, or control center room. To solve this problem, you must first fully understand the surrounding environment during system design and make an effort to avoid or move away from the radiation source. If it cannot be avoided, it is important to adopt shielding measures to strengthen the protection of the front-end and center devices, and also isolate the lines via pipes and ensure good grounding.
7. Pan-tilt Disorders:
It is a common issue for pan tilts to lose their ability to drive or not rotate at all after some time of use. In addition to product quality factors, common causes include:
1) When installing pan/tilt, only the camera is allowed to face in the correct direction, which increases the load on the pan/tilt and may lead to damage to the transmission mechanism or overheating of the motor.
2) When the total weight of the camera and its protective cover exceeds the allowable weight of the pan/tilt. Especially when used outdoors, the weight of the protective cover may be too heavy and the pan/tilt may not be able to rotate (especially vertically).
3) Outdoor pan/tilts operate in extreme temperature conditions or are not sufficiently waterproof or freeze-resistant.
4) If the distance from the keyboard to the pan/tilt is too far, the decoder will not be able to remotely control the camera (including the lens) and pan/tilt. This is usually because the control signal experiences significant attenuation during transmission, and the signal received by the decoder is too weak. Ways to solve this problem include using a repeater device to amplify the control signal.
Matrix host switching issues:
The problem of inaccuracy of image switching by the matrix host will appear in the image after selection, which may cause interference with other images and interference with row synchronization signals. This may be caused by the poor quality of the matrix switch, which cannot meet the isolation requirements between images. If you are using an RF transmission system, it may be because the crosstalk modulation and mutual modulation are too large.
8. If the monitor image contrast is too low or pale:
If the image on the monitor has too little contrast or appears faded, unless the problem is with the control host or the monitor itself, it is usually because the video transmission line is too long and the signal is attenuated too much. In this case, you need to add a line amplifier and compensation device.
9. If the image lacks clarity and details are lost:
This situation may cause problems such as loss of color signal and reduction in saturation, and is usually due to the large loss of the high frequency band of the image signal, especially the signal frequency above 3MHz. This may be because the signal transmission distance is too far and there is no intermediate amplification and compensation device, or the distribution capacity of the video transmission cable is large, or there is a large equivalent capacity between the core wire and the shield wire of the transmission line. OHWOAI's wireless solar panel type and POE power supply security camera has IP67 waterproof and dustproof specifications, which has a strong waterproof level and has no harmful effects even in bad weather such as rain and wind. It can also be installed outdoors. OHWOAI's wireless solar panel type and POE power supply security camera has 5 million high image quality, improved heat dissipation and durability, and a service life that is 4 times longer. OHWOAI's wireless solar panel type and POE power supply security camera has a high-quality 1TB built-in HDD and recording compression technology H265+, and can record for more than one month in the case of continuous recording of two 3 million pixel security cameras. It is possible to add 8 cameras.
10. Dropped frames issue:
Dropped frames usually occur in video baseband transmission for remote surveillance. This issue is mainly caused by high attenuation in the high frequency band of the signal, and can be solved by adding a compensation device.
OHWOAI provides high-quality video surveillance camera solutions and ensures the stable operation of customers' surveillance camera systems through professional fault troubleshooting and resolution. We believe that careful analysis and maintenance can quickly resolve any issues that arise and ensure the reliability and sustainability of the system.
1. Short circuit problem:
In a video surveillance camera system, there are many connection cables between devices, and if the connection cables of major devices are inappropriate and have connection errors, problems such as disconnection, short circuit, poor insulation, and misconnection may occur, which may cause the performance degradation or damage of the device. To solve this problem, it is very important to calmly analyze and clarify the faulty line and the possible fault phenomenon, and further ensure the connection of various cables so that each system device is suitable for long-term operation. OHWOAI's wireless solar panel type and POE power supply security camera can be monitored remotely with multiple devices. After connecting the recorder and router with an LAN cable and installing the app, you can monitor, watch, and talk with your family on various devices such as tablets, smartphones, and computers outside.
2. Interference issues:
Impedance mismatch will cause the monitor screen to show evenly spaced vertical stripe interference, and the frequency of the interference signal is usually an integer multiple of the line frequency. This kind of interference is usually caused by the impedance and distribution parameters of the video cable not meeting the requirements. To solve this problem, ensure that the impedance of each device in the system is consistent as much as possible, pay special attention to the cable quality when selecting video cables, and carry out sample testing of the cable if necessary. OHWOAI's wireless solar panel and POE powered security camera is equipped with a unique double WIFI antenna to improve the WIFI signal reception function. After connecting with WIFI, the image is stable and the call can be heard clearly.
3. Interface or communication protocol issues:
This problem frequently occurs between devices that have a communication control relationship, such as a control host and a decoder or a control keyboard. It usually occurs because parameters such as the communication protocol are not set correctly during the engineering installation process. To solve this problem, you need to make sure that you set the communication protocol parameters of devices such as the control host, decoder, and control keyboard correctly during installation.
4. Common problems with video interfaces:
1) 50Hz net frequency interference: black or white stripes appear on the monitor screen, scrolling up and down. This is usually caused by improper grounding of the front-end device and the control center device, which causes a potential difference loop to enter the system. It may also be caused by poor power performance of the device itself.
2) Noise white snow: Snow-like noise appears in the image, which is usually caused by signal attenuation and high-frequency noise in the signal transmission line.
3) Image overlap, whiteness, character vibration, stripe interference: These problems usually occur because the characteristic impedance of the video transmission line or between devices is not 75Ω, which is caused by impedance mismatch. To solve these problems, you need to ensure the quality of the line and impedance match.
5.Failure of devices related to the power supplied:
1) The power supply or voltage is incorrect.
2) Insufficient power or wire diameter of a particular power line causing large voltage drop.
3) There are problems with the power supply system's transmission lines, such as short circuits, disconnections, and momentary overvoltages.
Any power error or momentary overvoltage can cause damage to the device, so careful checking and inspection before applying power is necessary and should not be taken lightly.
6. Spatial radiation noise disturbances introduced by transmission lines:
This kind of interference is usually caused by the presence of a strong and high-frequency spatial radiation source near the transmission system, front-end, or control center room. To solve this problem, you must first fully understand the surrounding environment during system design and make an effort to avoid or move away from the radiation source. If it cannot be avoided, it is important to adopt shielding measures to strengthen the protection of the front-end and center devices, and also isolate the lines via pipes and ensure good grounding.
7. Pan-tilt Disorders:
It is a common issue for pan tilts to lose their ability to drive or not rotate at all after some time of use. In addition to product quality factors, common causes include:
1) When installing pan/tilt, only the camera is allowed to face in the correct direction, which increases the load on the pan/tilt and may lead to damage to the transmission mechanism or overheating of the motor.
2) When the total weight of the camera and its protective cover exceeds the allowable weight of the pan/tilt. Especially when used outdoors, the weight of the protective cover may be too heavy and the pan/tilt may not be able to rotate (especially vertically).
3) Outdoor pan/tilts operate in extreme temperature conditions or are not sufficiently waterproof or freeze-resistant.
4) If the distance from the keyboard to the pan/tilt is too far, the decoder will not be able to remotely control the camera (including the lens) and pan/tilt. This is usually because the control signal experiences significant attenuation during transmission, and the signal received by the decoder is too weak. Ways to solve this problem include using a repeater device to amplify the control signal.
Matrix host switching issues:
The problem of inaccuracy of image switching by the matrix host will appear in the image after selection, which may cause interference with other images and interference with row synchronization signals. This may be caused by the poor quality of the matrix switch, which cannot meet the isolation requirements between images. If you are using an RF transmission system, it may be because the crosstalk modulation and mutual modulation are too large.
8. If the monitor image contrast is too low or pale:
If the image on the monitor has too little contrast or appears faded, unless the problem is with the control host or the monitor itself, it is usually because the video transmission line is too long and the signal is attenuated too much. In this case, you need to add a line amplifier and compensation device.
9. If the image lacks clarity and details are lost:
This situation may cause problems such as loss of color signal and reduction in saturation, and is usually due to the large loss of the high frequency band of the image signal, especially the signal frequency above 3MHz. This may be because the signal transmission distance is too far and there is no intermediate amplification and compensation device, or the distribution capacity of the video transmission cable is large, or there is a large equivalent capacity between the core wire and the shield wire of the transmission line. OHWOAI's wireless solar panel type and POE power supply security camera has IP67 waterproof and dustproof specifications, which has a strong waterproof level and has no harmful effects even in bad weather such as rain and wind. It can also be installed outdoors. OHWOAI's wireless solar panel type and POE power supply security camera has 5 million high image quality, improved heat dissipation and durability, and a service life that is 4 times longer. OHWOAI's wireless solar panel type and POE power supply security camera has a high-quality 1TB built-in HDD and recording compression technology H265+, and can record for more than one month in the case of continuous recording of two 3 million pixel security cameras. It is possible to add 8 cameras.
10. Dropped frames issue:
Dropped frames usually occur in video baseband transmission for remote surveillance. This issue is mainly caused by high attenuation in the high frequency band of the signal, and can be solved by adding a compensation device.
OHWOAI provides high-quality video surveillance camera solutions and ensures the stable operation of customers' surveillance camera systems through professional fault troubleshooting and resolution. We believe that careful analysis and maintenance can quickly resolve any issues that arise and ensure the reliability and sustainability of the system.
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