The invention belongs to the technical field of rail transit, and relates to a high-reliability axle counting wheel sensor which comprises an LC oscillation circuit, a triode and a PWM controller. The LC oscillation circuit is connected with the collector electrode of the triode; the PWM controller is connected with the emitting electrode of the triode; the LC oscillation circuit is the change frequency of the collector current, and the PWM controller outputs and controls the emitter current of the triode; the PWM controller controls the LC oscillation circuit to be in a self-oscillation state all the time and controls the amplitude of the LC oscillation circuit to be a fixed value. The induction sensitivity of the wheel sensor is controlled not to be influenced by external factors all the time. The oscillation frequency of the coil can be adjusted within a certain range, the induction capacity of the coil can be increased or decreased, and the closer the PWM control frequency is to the oscillation frequency, the stronger the induction capacity is.
本发明属于轨道交通技术领域,涉及一种可靠性高的计轴车轮传感器,包括:LC震荡电路、三极管和PWM控制器;LC震荡电路与三极管的集电极连接;PWM控制器与三极管的发射极连接;LC震荡电路是集电极电流的变化频率,PWM控制器输出控制三极管发射极电流;PWM控制器控制LC震荡电路始终为自激振荡状态,且控制LC震荡电路的振幅为定值。其控制车轮传感器感应灵敏度始终不受外界因素的影响。线圈振荡频率在一定范围内可调节,可以增大或减小线圈的感应能力,PWM控制频率越靠近振荡频率,感应能力越强。
Axle counting wheel sensor with high reliability
一种可靠性高的计轴车轮传感器
2024-01-16
Patent
Electronic Resource
Chinese
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC |
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