Method for detecting vertical force of linear motor based on vertical strain of bolts

Abstract

The invention provides a method for detecting vertical force of a linear motor based on vertical strain of bolts. The method includes the following steps: manufacturing force measuring bolts, and calibrating the force measuring bolts through a mechanical testing machine; on a sensing steel plate, fixing the force measuring bolts on steel plate on a concrete substrate through a pinch plate, and respectively arranging measuring points on each bolt; grinding each measuring point and the corresponding position, and wiping up by using alcohol; setting four strain gauges symmetrically on the same circumferential side surface of each bolt, wherein the adjacent two strain gauges are perpendicular to each other, and the strain gauges are tightly closed by silica gel; performing assembling of a testbridge circuit on the attached strain gauges; accessing the bridge circuit assembled at each measuring point to a strain collector system, and collecting the strain of the bolts when a train passes through the area; and inverting the vertical force of the linear motor by using the relationship between the force and the strain obtained through calibration by a laboratory. The method for detectingvertical force of a linear motor based on vertical strain of bolts is a non-destructive testing method, and the detecting process does not affect the stability of the track structure, and more accurate vertical force of the linear motor can be obtained through the field test.

Description

technical field [0001] The invention relates to a method for detecting the vertical force of a linear motor based on the vertical strain of a bolt. Background technique [0002] Urban rail transit has become an indispensable means of transportation for human beings, and the development of rail transit is a fundamental measure to solve the traffic problems in big cities. With the increase of urban rail transit traffic, the increase of travel speed, the deterioration of the complexity of the operating environment and the increase of service time, the fatigue damage of vehicles and track structural components has intensified, which seriously threatens the service life of subway vehicles and lines. It also poses serious challenges to the safety, stability, comfort and noise control of urban rail transit. [0003] In the traditional wheel-rail contact railway, the traction (or driving force), guiding force and supporting force obtained by the vehicle are all obtained by the inte...

AI Technical Summary

Problems solved by technology

With the increase of urban rail transit traffic, the increase of travel speed, the deterioration of the complexity of the operating environment and the increase of service time, the fatigue damage of vehicles and track structural components has intensified, which seriously threatens the service life of subway vehicles and lines. The maintenance work and a large amount of manpower and material resources have been invested, which have also caused serious challenges to the safety, stability, comfort and noise control of urban rail transit.

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