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Axle counting system and axle signal processing and axle counting method used for same

A signal processing and axle counting technology, applied in railway signaling, railway signaling and safety, vehicle route interaction equipment, etc., can solve problems such as signal weakening and axle loss, and achieve the effect of improving reliability.

Active Publication Date: 2014-03-19
SHENZHEN KEANDA ELECTRONICS TECH
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Problems solved by technology

[0006] Aiming at the above-mentioned shortcomings of the wheel sensor in the prior art that the signal is weakened when the wheel jumps off the axle or the wheel swing is too large, it is easy to cause the phenomenon of axle loss, the present invention provides a new

Method used

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  • Axle counting system and axle signal processing and axle counting method used for same
  • Axle counting system and axle signal processing and axle counting method used for same
  • Axle counting system and axle signal processing and axle counting method used for same

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Embodiment Construction

[0028] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.

[0029] In the present invention, an axle counting system is protected, which mainly includes a wheel sensor (or called an axle counting sensor), an A / D converter and a DSP, and the wheel sensor outputs an axle counting signal to the A / D converter, and through the A / D conversion After analog-to-digital conversion, the device is output to the DSP. In this embodiment, a linear optocoupler isolation module is connected between the wheel sensor and the A / D converter, which can isolate high and low voltage signals.

[0030] The above-mentioned embodiment is the simplest implementation mode of the present invention. During specific implementation, one pulse shaping module can also be connected in parallel. After the isolation module, output to the count...

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Abstract

Provided are an axle counting system and an axle signal processing and axle counting method used for the same. The system comprises a wheel sensor, an analog / digital (A / D) converter and a digital signal processor (DSP). The wheel sensor outputs an axle counting signal to the A / D converter, and the axle counting signal is subjected to analog / digital conversion through the A / D converter and then output to the DSP. The method includes that analog axle counting signals output by the axle counting sensor are subjected to digital quantization through the A / D converter and output to the DSP, and the DSP conducts identity recognition on two signals. Conditions for judging waveform similarity of the two signals include that (1) the deviation of time width of two pulses is at most 20%; (2) the two signals must have an overlapped portion which exceeds 1 / 3 of the whole pulse; (3) the front end and the rear end occupy over 1 / 6 of the whole pulse besides the overlapped portion. Under the normal condition, axle counting is conducted the same as an original system, axle loss cannot happen even signals are weakened to a certain degree, but the original system loses axles when the signals are weakened to the certain degree.

Description

technical field [0001] The invention discloses an axle counting system and an axle signal processing and axle counting method used in the axle counting system, so that the axle counting equipment can count axles more accurately when facing complex field conditions, and improve the reliability and reliability of the axle counting equipment. safety. Background technique [0002] Rail transport occupies a pivotal position in people's daily life, and occupies a large proportion in land transport. Since rail transportation belongs to rail transportation, due to its special operation mode, the requirements for its operating environment are also very high. What is especially important is that at the same time, only one train can exist on the same section of the rail route. At present, the widely used means for detecting the presence of trains on the rails is the track circuit. The track circuit is a circuit composed of a rail of a rail line as a conductor. It is used to au...

Claims

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Application Information

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IPC IPC(8): B61L1/16
Inventor 张帆郭丰明
Owner SHENZHEN KEANDA ELECTRONICS TECH
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