After a network camera monitoring system enters the commissioning phase, commissioning phase, and after delivery, there may be such failure phenomena as, for example, technical indicators that do not function properly, systems that do not meet design requirements, and overall performance and quality are not satisfactory. That is some "soft problems." These problems are inevitable for a network camera surveillance project, especially for a complex, large-scale monitoring project.
1. Device failure caused by improper power supply to the network camera. Incorrect power supply may be as follows: The power supply line or power supply voltage is incorrect, the power is not enough (or the line diameter of a certain power supply line is not enough, the voltage drop is too large, etc.), the transmission line of the power supply system has a short circuit, open circuit, and instantaneous Pressure and so on. In particular, the device may be damaged due to power supply errors or instantaneous overvoltage. Therefore, in the commissioning of the system, before the power supply, it must be carefully checked and checked carefully and must not be taken lightly.
2. Since there are many links between certain devices (such as a network camera with three variable lenses and a PTZ), if the handling is not good, especially if the line connected to the device is not handled well, there will be a disconnection, a short circuit, Poor insulation between wires and miswiring lead to equipment damage and performance degradation. In this case, the analysis should be made calmly based on the phenomenon of failure, and it should be determined on which of the lines that the connection is faulty. This will reduce the scope of the problem. It is particularly worth pointing out that cameras with pan-tilt heads have a long time due to all-round movements, resulting in disconnection and breakage of connections that are common. Therefore, special attention should be paid to the connection of equipment and various lines in this case to meet the requirements of long-term operation.
3. The quality of the network camera equipment or components itself. In theory, quality problems may occur on various devices and components of network cameras. However, from an experience point of view, the pure quality of the product itself occurs in decoders, electric gimbals, and transmission components. It is worth pointing out that the quality of some devices may not appear to be unusable due to their overall quality. However, some technical indicators do not meet the specifications given in the product specifications. Therefore, the necessary sample testing must be performed on the selected product. If it is indeed a product quality problem, the best way is to replace the product and not to dismantle and repair it.
In addition, the most common problems are due to improper adjustment of equipment. For example, the adjustment of the intercept of the network camera is very meticulous and accurate. If the adjustment is not carefully performed, there will be problems such as poor focus or defocusing during the operation of the three variable lenses. In addition, whether the positions of some switches and adjustment knobs on the network camera are correct, whether they meet the technical requirements of the system, the correctness of the encoder code switch or other adjustable position settings directly affect the normal use of the device itself or affect the normality of the entire system. performance.
4. Problems arising from incorrect connection between equipment (or components) and equipment (or components) will generally occur in the following areas:
(1) Impedance mismatch.
(2) Communication interface or communication method does not correspond. This situation mostly occurs between the control host and a device such as a decoder or a control keyboard that has a communication control relationship. That is, the selected control host and decoder or the control keyboard are not caused by a manufacturer's product. Therefore, the same manufacturer's products should be used for the host, the decoder, and the control keyboard.
(3) The drive capacity is insufficient or exceeds the specified number of device connections. For example, some picture splitters have an alarm input interface and a system host connected to alarm probes, long time delay recorders, etc. is provided in its product specification. If an alarm probe is connected to the screen splitter At the input, the probe's alarm signal will drive both the control panel and the screen divider. In this case, the problem of insufficient driving capacity often arises. The phenomenon is that although the screen divider can alarm, but the input alarm signal is weak and the work is not stable, resulting in the network camera corresponding to the occurrence of the alarm signal image is instantly converted to a full screen on the monitor The picture is lost (cannot hold), and the image on the webcam monitor is still the multi-picture before the alarm.
One of the solutions to the above problem is that the network camera uses the dedicated alarm interface box to connect the alarm probe signal with the screen splitter or the video switching host. The second method is to design the processing signal by itself when there is no alarm interface box. Expand device or drive device.
1. Device failure caused by improper power supply to the network camera. Incorrect power supply may be as follows: The power supply line or power supply voltage is incorrect, the power is not enough (or the line diameter of a certain power supply line is not enough, the voltage drop is too large, etc.), the transmission line of the power supply system has a short circuit, open circuit, and instantaneous Pressure and so on. In particular, the device may be damaged due to power supply errors or instantaneous overvoltage. Therefore, in the commissioning of the system, before the power supply, it must be carefully checked and checked carefully and must not be taken lightly.
2. Since there are many links between certain devices (such as a network camera with three variable lenses and a PTZ), if the handling is not good, especially if the line connected to the device is not handled well, there will be a disconnection, a short circuit, Poor insulation between wires and miswiring lead to equipment damage and performance degradation. In this case, the analysis should be made calmly based on the phenomenon of failure, and it should be determined on which of the lines that the connection is faulty. This will reduce the scope of the problem. It is particularly worth pointing out that cameras with pan-tilt heads have a long time due to all-round movements, resulting in disconnection and breakage of connections that are common. Therefore, special attention should be paid to the connection of equipment and various lines in this case to meet the requirements of long-term operation.
3. The quality of the network camera equipment or components itself. In theory, quality problems may occur on various devices and components of network cameras. However, from an experience point of view, the pure quality of the product itself occurs in decoders, electric gimbals, and transmission components. It is worth pointing out that the quality of some devices may not appear to be unusable due to their overall quality. However, some technical indicators do not meet the specifications given in the product specifications. Therefore, the necessary sample testing must be performed on the selected product. If it is indeed a product quality problem, the best way is to replace the product and not to dismantle and repair it.
In addition, the most common problems are due to improper adjustment of equipment. For example, the adjustment of the intercept of the network camera is very meticulous and accurate. If the adjustment is not carefully performed, there will be problems such as poor focus or defocusing during the operation of the three variable lenses. In addition, whether the positions of some switches and adjustment knobs on the network camera are correct, whether they meet the technical requirements of the system, the correctness of the encoder code switch or other adjustable position settings directly affect the normal use of the device itself or affect the normality of the entire system. performance.
4. Problems arising from incorrect connection between equipment (or components) and equipment (or components) will generally occur in the following areas:
(1) Impedance mismatch.
(2) Communication interface or communication method does not correspond. This situation mostly occurs between the control host and a device such as a decoder or a control keyboard that has a communication control relationship. That is, the selected control host and decoder or the control keyboard are not caused by a manufacturer's product. Therefore, the same manufacturer's products should be used for the host, the decoder, and the control keyboard.
(3) The drive capacity is insufficient or exceeds the specified number of device connections. For example, some picture splitters have an alarm input interface and a system host connected to alarm probes, long time delay recorders, etc. is provided in its product specification. If an alarm probe is connected to the screen splitter At the input, the probe's alarm signal will drive both the control panel and the screen divider. In this case, the problem of insufficient driving capacity often arises. The phenomenon is that although the screen divider can alarm, but the input alarm signal is weak and the work is not stable, resulting in the network camera corresponding to the occurrence of the alarm signal image is instantly converted to a full screen on the monitor The picture is lost (cannot hold), and the image on the webcam monitor is still the multi-picture before the alarm.
One of the solutions to the above problem is that the network camera uses the dedicated alarm interface box to connect the alarm probe signal with the screen splitter or the video switching host. The second method is to design the processing signal by itself when there is no alarm interface box. Expand device or drive device.
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