The anti-interference ability of headphone socket and the requirement and situation of its use are introduced to you. Because there are many applications of headphone socket, there are many things to pay attention to. Please understand these contents and methods in detail.
Novel photoelectric switches of headphone socket series usually have the function of automatically preventing mutual interference, so there is no need to worry about mutual interference. However, when the series of counter-fired infrared photoelectric switches are installed side by side, the adjacent groups and mutual interference should be prevented. The most effective way to prevent this kind of interference is to set the projector and receiver crosswise, and to open the group spacing when exceeding the group. Of course, using different frequencies of the machine is also a good way. The effective way to prevent mutual interference of series reflective photoelectric switches is to open the interval. Headphone socket and the farther the detection distance is, the greater the interval should be. The specific interval should be determined according to the debugging situation. Of course, different types of machines with different working frequencies can also be used.
Mirror angle effect: When the measured object is glossy or encounters a smooth metal surface, its reflectivity is generally very high, and it has the function of approximating the mirror surface. At this time, the angle between the projector and the detected object should be installed so that its optical axis is not perpendicular to the detected object, so as to prevent misoperation. Exclude the influence of background: When using reflective diffuse projector and receiver, sometimes the photoelectric switch may not be able to detect stably because the detected object is close to the background, the photoelectric switch or the background is smooth and other objects with high reflectivity. DC power socket has a large demand for electricity in winter. Some users like to plug computers and heating into the same multi-purpose socket. Although it is very convenient to use, it has a great potential safety hazard. In the case of electric heating, its starting current is very large. If it starts at the same time with other high-power electrical appliances, the contacts and leads of sockets will be difficult to withstand the sudden excessive electric load, which will affect each other, even destroy the electrical appliances themselves, and even cause accidents.
When sockets are installed, open sockets should be no less than 1.8 meters from the ground; concealed sockets should be no less than 0.3 meters from the ground. In order to prevent children from electric shock, finger touch or metal plugging into the hole of power supply, safe sockets with safety shield must be selected; the construction wiring requirements of single-phase two-eye sockets are: when the hole is arranged horizontally, it should be "left zero fire" and "up fire down zero" when it is arranged vertically. The wiring requirement of single-phase three-eye socket is that the top grounding hole must be firmly connected with the grounding wire, solidly connected, and must not be disconnected. The remaining two holes of DC power outlet are connected according to the rule of "left zero right fire". It is noteworthy that the zero line and the protective grounding line should not be staggered or connected as one. Refrigerators should use independent three-eye sockets with protective grounding. Earphone socket manufacturers are well known that the socket can only withstand 2500W power, but the frequent or simultaneous use of high-power electrical appliances such as home computers and electric heating will exceed the safe carrying range of the current of ordinary sockets, which can easily lead to power failure or even fire accidents. Therefore, high-power appliances must be equipped with 4000W high-power sockets. The socket is too low. When installing sockets, many families feel that it is too high to be beautiful and will be installed in a lower hidden location. It is easy to splash water into the socket when mopping the ground, which leads to leakage accident.
Industry regulations, open socket from the ground is best not less than 1.8 meters; earphone socket manufacturers concealed socket from the ground is not less than 0.3 meters. The socket of kitchen and toilet should be 1.5 meters above the ground, and the socket of air conditioning should be at least 2 meters above. Mistake 2: Wire of socket is installed at will. Xia Dong told reporters that the power supply wire must use the cross section of copper wire. If you live in an old house, you must replace the original aluminum wire with copper wire. Because the aluminium wire is very easy to oxidize, the joint is easy to ignite. Investigations have shown that the incidence of electrical fires in residential buildings using aluminium wires is dozens of times higher than that of copper wires. In addition, many families in order to be beautiful, will use grooved buried wire, dark pipe laying, Xia Dong reminded that wiring must follow the principle of "fire line into the switch, zero line into the lamp head", but also in the socket leakage protection device. Measuring circuit of transformer and silicon rectifier. At the same time, the voltage drop method is recommended to measure the main circuit resistance of switching socket because the current passing through the test is large enough to destroy the metal oxide film on the contact surface, reduce the measurement error, and the measured value is more accurate. Therefore, the voltage drop method is recommended to measure the main circuit of switching socket. The cumbersome calculation of micro-switch shows that if the attenuation time constant on the circuit of switch socket is set at 45 ms, the circuit of phase A and phase B is connected at the same time, and when the DC component in phase A and phase B reaches o.866, the maximum DC component in phase B (assuming that it happens to be a side phase) can reach 112%. If the decay time constant in the switching socket system is increased to 60 ms, the maximum DC component in the six-phase (three-phase) system will reach l15%. In the "split" test, the DC component at the instant of contact separation is related to the duration of short circuit, that is, the opening time of circuit breaker and the action time of relay protection.
DC power socket is connected by two parts. One part of the headphone socket manufacturer tightens the wire and then inserts it into the other part, which is welded to the PCB board. This connection is based on the mechanical principle of the bottom. The anti-vibration design ensures the long-term airtight connection of the product and the reliability of the product. The two ends of the socket can be fitted with assembling ears. The assembling ears can protect the patches to a great extent and prevent the bad arrangement of the patches.
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