About security surveillance cameras

As we all know, solar monitoring uses solar energy to convert into electrical energy, which solves the monitoring problem that the environment cannot be powered by electricity. If the sun is in normal weather, there is no problem with solar power supply. But the actual situation is that there are always cloudy or rainy days in a month, especially in the northern winter, which has been rainy for several months. In this kind of bad weather, can solar energy still power the monitoring normally?Will this weather stop working? The answer is: the same can be done! The principle is: on cloudy or rainy days, the sun is only obscured by clouds. The solar class A monocrystalline silicon panels used by our company can still receive solar energy in such bad weather, and the conversion rate is only less than 50% lower than normal solar weather.On cloudy or rainy days, lithium batteries will still be charged. Taking into account this factor, if on a sunny day, a 100W solar panel can be charged for seven hours a day to fully charge a 40ah battery, then we should consider increasing the power of the solar panel on rainy days instead of increasing the power of the battery.

The cause and solution of the failure of surveillance camera equipment 1. Equipment failure caused by power supply error.There are several possibilities for power supply errors: wrong power supply line or power supply voltage, insufficient power (or insufficient wire diameter of a power supply line, excessive step-down, etc.), short circuit, circuit breaker, instantaneous overvoltage, etc. of the power supply system transmission line.In particular, equipment damage caused by power supply errors or instantaneous overvoltage is not uncommon.Therefore, in the commissioning of the system, before the power supply is supplied, it must be carefully and strictly checked and checked, and it must not be taken lightly. 2. Due to the large number of connection points of some equipment (such as cameras with three-lens and PTZ), if it is not handled well, especially the lines connected to the equipment, there will be circuit breaks, short circuits, poor insulation between the lines, and wrong connections, resulting in equipment damage and performance degradation.In this case, it is necessary to calmly analyze the fault phenomenon and determine which of the several lines has a problem with the connection, so that the scope of the problem will be narrowed.It is particularly worth pointing out that cameras with PTZ are common to fall off and disconnect due to long-term all-round movement. Therefore, special attention should be paid to the connection between the equipment in this situation and the various lines to meet the requirements of long-term operation. 3. Quality problems of equipment or components.In theory, quality problems may occur with various equipment and components.However, from experience, it is purely a quality problem of the product itself, which mostly occurs in decoders, electric gimbals, transmission components and other equipment.It is worth pointing out that some equipment may not be unusable from the overall quality point of view, but some technical indicators do not meet the indicators given in the product manual.Therefore, the necessary sampling inspections must be carried out for the selected products.When it is really a product quality problem, the best way is to replace the product instead of disassembling and repairing it by yourself.In addition, the most common problems are caused by improper equipment adjustment. For example, the adjustment of the rear intercept of the camera is a very detailed and precise work. If you do not adjust carefully, the three-variable lens will have problems such as inaccurate focus and out of focus during various operations.In addition, whether the positions of some switches and adjustment knobs on the camera are correct, whether they meet the technical requirements of the system, whether the encoding switch of the decoder or other adjustable parts are set correctly, will directly affect the normal use of the equipment itself or the normal performance of the entire system. 4. Problems caused by incorrect connection between equipment (or components) and equipment (or components) generally occur in the following aspects： (1) Impedance mismatch. (2) The communication interface or communication method does not correspond.This situation mostly occurs between the control host and the decoder or control keyboard and other devices that have a communication control relationship, that is, the selected control host and the decoder or control keyboard are not caused by the same manufacturer's products.Therefore, the host, decoder, control keyboard, etc. should choose products from the same manufacturer. (3) The driving capacity is insufficient or exceeds the specified number of equipment connections.For example, some screen dividers have an alarm input interface, and the product manual shows that the system host is connected to an alarm probe, a long-delay video recorder, etc. to form a system.If the alarm probe is connected to the alarm input terminal of the screen splitter, the alarm signal of the probe will drive the alarm host and the screen splitter at the same time.In this case, the problem of insufficient driving ability often occurs.The phenomenon manifested is that although the screen splitter can alarm, the input alarm signal is weak and the work is unstable, resulting in the image screen of the camera corresponding to the alarm signal is instantly converted into a full-screen screen on the monitor but lost (cannot be maintained), so that the image on the monitor is still multi-screen before the alarm. Solutions to the above problems： One is to connect the signal of the alarm probe to the screen splitter or video switching host through a dedicated alarm interface box. 2. When there is no alarm interface box, you can design your own processing signal expansion equipment or drive equipment. The above problems will also occur in the output and distribution of video signals. Frequently Asked Questions about Public Broadcasting system： 1.Power amplifier output overload A.Check whether the circuit is shorted. B. Check whether the impedance of the speaker is consistent and whether there is a short circuit. C.Check whether the input voltage is normal. Frequently asked questions about alarm system： 1.The alarm signal cannot be disarmed. A.The resistance at the end of the line is not connected well or the connection is wrong. B. Whether the input line is in a short-circuited (disconnected) state. C. Whether the probe is working normally. 2. No alarm A. Whether defenses are deployed. B.Is the deployment programming correct? C. Can you hear the action sound of the probe or the detector in the alarm host?