Photoelectric speed monitoring method and device for train with magnetic transmission

Abstract

A method for monitoring train speed by utilizing photoelectric speed transducer with magnetic driving sets a magnetic force driving mechanism between generating unit of train monitoring data and collecting unit of transducer data to let train monitoring data be transmitted to transducer data collecting unit through said mechanism .The said transducer is prepared as applying two LED light sources, making a grating disc change to be intermittent light by utilizing said mechanism between train axle and axle box to let photosensitive diode of light interrupter be operated on and off ,converting two paths of pulse to be four paths of pulse by IC then outputting then by CAN bus .

Description

technical field [0001] The invention belongs to a method for collecting train operation monitoring data, in particular to a method for collecting train speed monitoring data; the invention also relates to a device for the method. It is mainly used to provide accurate signals directly to the train operation monitoring device. It can be used to collect various train speed, positioning and other signals from the shaft. Background technique [0002] The train speed sensor is an important part of the train safety operation control device. It is mainly used to directly provide accurate speed signals to the train operation monitoring device to prevent the train from passing through the turnout area at a speed higher than the maximum speed allowed by the turnout; to prevent the train from running at a speed higher than the maximum speed allowed by the line in the operating section; The maximum speed allowed by the structure of locomotives and vehicles; to prevent it from running a...

AI Technical Summary

Problems solved by technology

In short, the use of this universal joint transmission mechanism will inevitably lead to mechanical failure or even damage to the sensor (the sensor cannot bear the impact inertia of the wheel set)

[0007] 2. The light source is seriously polluted

[0008] This type of photoelectric sensor uses a light source to turn intermittent light through a grating disc that rotates with the wheel shaft. Because it is a universal joint, this transmission mechanism directly communicates with the inner cavity of the wheel axle box, and cannot achieve a fully sealed state structurally. , the pollution of the grating disk will distort the optical signal and cause mutual pollution

First of all, the 0.2mm optical groove is very easy to be polluted, and secondly, the grating disc is also easily polluted

[0009] 3. The output waveform is highly distorted

Due to the processing accuracy of the grating disk and the rotating shaft, the square wave pulse is distorted, so the potentiometer or variable resistor is used for adjustment in the amplification and shaping circuit, and its accuracy is difficult to guarantee.

[0011] 4. Poor function scalability

[0012] One is that it is difficult to meet the requirements of train speed increase by using universal linkage mechanism. This structure itself is easy to cause mechanical failure. When the maximum speed is 1000r / min, the train speed is 198-235km / h. When the train speed reaches about 300km / h, The speed of the sensor is 1300~1500r / min. At this time, the requirements for the transmission mechanism are higher, and this kind of sensor is difficult to meet the requirements.

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