A system and method for double wireless redundant signal transmission for platform door

Abstract

The invention discloses a dual wireless redundant signal transmission system for a platform door, which comprises two wireless transmitting devices, two wireless receiving devices and a CAN bus. The two wireless transmitting devices and the two wireless receiving devices perform dual wireless networking. The transmitting device executes the corresponding wireless signal transmission process according to the vehicle instrument signal and the feedback signal of the wireless receiving module. The wireless receiving device and the CAN communicate in real time and send heartbeats to each other to detect the connection status between itself and the CAN bus, thereby judging whether the other party CAN The signal transceiver takes over; the present invention discloses a method for transmitting dual wireless redundant signals of a platform door, which uses the above-mentioned system to transmit the dual wireless redundant signals of a platform door. The invention adopts two sets of wireless transmitting devices and two sets of wireless receiving devices, uses short-distance wireless modulation technology to convert signals, completes the redundant transmission of switch door signals, realizes dual real-time wireless communication, the signals are mutually backed up, and has good anti-interference and reliability. Sex is high.

Description

technical field [0001] The invention relates to urban trams, in particular to a system and method for double wireless redundant signal transmission for platform doors. Background technique [0002] The open and close signal of the platform door of the urban tram is sent by the vehicle, and the signal transmission is generally realized by means of short-distance wireless. The commonly used super-heterodyne wireless transceiver modules such as the frequency band 315MHz and 433MHz, the existing wireless control method cannot realize two-way communication. And it has the shortcomings of simple signal, easy to crack, poor anti-interference, and short transmission distance. During the operation process, the platform door cannot be opened and closed and the accidental door opening failure occurs frequently, which seriously affects the normal operation of the vehicle. [0003] In the prior art, a pair of transceivers are used to complete the door-opening signal transmission between ...

AI Technical Summary

Problems solved by technology

[0002] The door switch signal of the urban tram station platform is sent by the vehicle, and the signal transmission is generally realized by short-distance wireless, etc., and superheterodyne wireless transceiver modules such as frequency bands 315MHz and 433MHz are commonly used. The existing wireless control methods cannot realize two-way communication. And it has the disadvantages of simple signal, easy to crack, poor anti-interference, and short transmission distance. During the operation, the platform door cannot be opened and closed, and accidental door opening failures occur frequently, seriously affecting the normal operation of the vehicle.

[0003] In the existing technology, a pair of transceivers is used to complete the signal transmission between the vehicle and the platform door. The transceiver usually adopts civil superheterodyne wireless transceiver technology, which has the advantages of simple signal, easy cracking, poor anti-interference, and short transmission distance. Disadvantages, and real-time two-way communication cannot be realized. After the transmitter sends a wireless signal, it cannot be determined whether the receiver has successfully received it. In addition, vehicles and platforms have metal shields, which have high requirements for the diffraction of wireless transmission.

The disadvantages of the existing technology are poor signal security, poor anti-interference, short transmission distance, no two-way intercommunication, poor diffraction, etc.

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