A method and device for monitoring the whole process of turnout movement based on magnetic grid measurement

Abstract

The invention discloses a method and device for monitoring the whole process of turnout action based on magnetic grid measurement. The related method includes: installing double magnetic grid scales on the main and auxiliary display rods and friction couplings respectively, and setting the distance between each double magnetic scale scale A magnetic sensor group is installed inside; the double magnetic scale includes two magnetic scales with different numbers of magnetic poles, and each magnetic scale is equipped with a plurality of N magnetic poles and S magnetic poles alternately; when the switch moves, through the corresponding magnetic poles The sensor groups respectively read the number of two magnetic poles corresponding to the double magnetic scale on the main and auxiliary indicating rods, and determine the respective absolute positions of the main and auxiliary indicating rods through the difference in the number of the two magnetic poles, and then obtain the relative positions of the main and auxiliary indicating rods ; The magnetic sensor group and the double magnetic scale on the same friction coupling measure the absolute position before and after the rotation, and obtain the relative distance after the rotation, and then determine the friction resistance. The above scheme can accurately grasp the switch gap and frictional resistance, realize predictive maintenance, and prolong the service life of the switch machine.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and device for monitoring the whole process of a turnout movement based on magnetic grid measurement. Background technique [0002] With the continuous expansion of the scale of my country's road network, while bringing convenience to people's travel, it also brings greater pressure to the safety of railway transportation. The switch machine is an important signal infrastructure equipment that changes the opening direction of the turnout, and then changes the driving route. Because of its frequent switching, it is also a high-failure equipment, and it is a key maintenance object of the railway. At present, switch gap monitoring equipment and signal centralized monitoring equipment are generally used to monitor the working process of the switch machine in real time. The friction current of the switch machine is measured by adding resistance blocks during the skylight...

AI Technical Summary

Problems solved by technology

[0010] (4) Maintenance of the lens: Since there are both dust and oil gas inside the switch machine, it is inevitable that there will be dirt after a long time, and it is difficult to maintain in a narrow space, which affects the measurement accuracy

[0011] (5) The relative displacement of the main and auxiliary indicating rods: the two notches on the indicating rods are respectively on different indicating rods, and the relative movement between them indicates that the turnout stroke changes, or the positioning or reversed turnout cannot be closely attached, and the turnout The gap monitoring equipment cannot monitor this kind of relative displacement, and there is a problem of insufficient local monitoring

[0012] (6) Data volume: The higher the accuracy of monitoring and measurement, the stronger and more complex the data processing capability of the CPU is required, the greater the amount of data generated, the higher the cost of software and hardware overhead, and the heavier the burden of communication. Using video, The large amount of data affects the stable work of the switch gap monitoring equipment

Regularity adjustment is human-controllable, but during the actual operation of the electric switch machine, due to the change of external temperature difference, the dynamic friction coefficient generated by the mechanical operation of the internal friction belt, the useful power conversion of the motor, and whether its surface is clean, etc., will change the friction. Force current, this method produces failure hazards and hazards that are uncontrollable

In addition, the measurement of frictional resistance can only be measured once at a long time interval, which cannot truly reflect the situation of frictional resistance.

[0015] In addition, the existing switch gap and frictional resistance measurements only reflect the measured parameters through other parameters, which can only reflect the trend or local characteristics of the measured parameters, and cannot reflect the entire process of the measured parameters (such as: the gap measurement range is not greater than 20mm, the accuracy is ±0.1mm, and the switch action range is 160mm to 190mm), which cannot solve the relative movement between the main and auxiliary indicating rods

Moreover, there is no linkage between the switch gap, the switch operating current and the friction force, and the switch machine cannot be effectively monitored.

Images