Relay control method and device and relay driving system
A relay control and relay technology, applied in relays, circuits, electrical components, etc., can solve problems that threaten people's life safety, car crashes, etc., and achieve the effect of ensuring safety and stability and improving accuracy
Pending Publication Date: 2020-12-04
BEIJING RAILWAY SIGNAL
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Problems solved by technology
The core of the safety issue of axle counting products lies in the output of the relay. When the relay is picked up, it means that the section is free, and when the relay is down, it means that there is a car passing by the section. Therefore, in railway products, the accuracy of the relay output must be ensured, otherwise, it will be very difficult Crash accidents are prone to occur, seriously threatening the lives of the people, and the consequences are disastrous
Method used
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[0049] In related technologies, there are many driving modes for relays, among which transistor (including NPN type and PNP type) drive, ULN2003 drive, optocoupler + transistor drive and optocoupler + UNL2003 drive are commonly used. Optocoupler is the abbreviation of optocoupler or optoisolator. It is a device that uses light as a medium to transmit electrical signals. The output terminal flows out, thereby realizing the conversion of "electricity-optical-electricity", and using the optocoupler to realize safe electrical isolation between the output terminal and the input terminal, so as to avoid mutual interference between the input signal and the output signal. The common idea of these driving methods is: use a switch control signal to directly control the relay, such as: the most common is optocoupler + transistor drive, the control principle is as follows: the optocoupler is controlled by a single external signal to turn on and off, Due to the large internal resistance ...
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The invention provides a relay control method and device and a relay driving system. A first driving signal and a second driving signal are acquired, and the frequency of the first driving signal is twice that of the second driving signal; the frequency of the second driving signal is increased to obtain a frequency-increased second driving signal, so that the frequency of the frequency-increasedsecond driving signal is twice that of the second driving signal; the first driving signal is compared with the frequency-increased second driving signal; and if the first driving signal is consistentwith the frequency-increased second driving signal, a relay is jointly driven by the first driving signal and the second driving signal, and the relay is controlled to act. Two controllers are used for driving the relay, and two driving signals are compared, so that the accuracy of the relay driving signals can be greatly improved, and the safety and stability of a relay driving system are ensured.
Description
technical field [0001] The present application belongs to the technical field of relay control, and in particular relates to a relay control method, device and relay drive system. Background technique [0002] At present, my country's rail transit industry is developing rapidly. In today's social life, high-speed rail has become the preferred means of transportation for people to travel. It has the advantages of fast transportation speed, good safety performance, high comfort, low energy consumption, and convenience. Therefore, it is very important to ensure the efficiency and safety of high-speed rail operations. [0003] Axle counting equipment is a kind of railway signal equipment that can detect passing wheels. It uses track sensors and counters to record and compare the number of axles entering and leaving the track section to determine the occupancy and idleness of the track section. It is a technical equipment railway product used to calculate the number of axles of ...
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Login to View More IPC IPC(8): H01H47/00H01H47/22
CPCH01H47/00H01H47/001H01H47/22
Inventor 范思阳张军于树永陈强李鹏斐
Owner BEIJING RAILWAY SIGNAL