Novel high-speed rail shaft monitoring system

Abstract

The invention relates to a novel high-speed rail shaft monitoring system, and belongs to the field of rail vehicle monitoring and piezoelectric power generation. A wheel shaft is arranged on a frame via a bearing, an end cover is arranged at an end part of a shell of the frame, a cylindrical cam with a cam groove is arranged at an end part of the wheel shaft, one end of the cylindrical cam sleevesthe wheel shaft and props against to an inner ring of the bearing, piezoelectric vibrators and a spring sheet are arranged on a boss of the shell of the frame, a free end of the spring sheet is embedded into a groove of an exciter, a guide post is arranged on the exciter, a rolling body sleeves the guide post and is in a cylindrical or spherical shape, the rolling body is arranged in the cam groove, each piezoelectric vibrator is formed by splicing a substrate and a piezoelectric sheet, the piezoelectric vibrators are symmetrically arranged at two sides of the spring sheet, the substrate is arranged near to the spring sheet, a gasket is crimped between the substrate and the spring sheet, suspended magnets are arranged at free ends of the piezoelectric vibrators, a circuit board and a sensor are arranged on the frame, the piezoelectric vibrators are connected with the circuit board via wires, and the circuit board is connected with the sensor via a wire.

Description

technical field [0001] The invention belongs to the technical field of rail transit monitoring and piezoelectric power generation, and in particular relates to a novel high-speed rail shaft system monitoring device. Background technique [0002] The normal operation of rail train wheels is the key to ensure the safe operation of rail vehicles. In the past, the health status of the key components of rail vehicle wheel trains was guaranteed by regular maintenance and overhaul; with the continuous improvement of vehicle operating speed and the improvement of people's safety awareness, the research on real-time online monitoring technology of wheel sets during vehicle operation has been favored by domestic and foreign countries. Widely concerned by foreign scholars, the required monitoring elements include shaft and bearing temperature, rotational speed, dynamic stiffness, wear and vibration, and many other aspects. For the wheel set monitoring system, the ideal method is to in...

AI Technical Summary

Problems solved by technology

In order to solve the power supply problem of the train shafting real-time monitoring system, scholars at home and abroad have proposed a micro-sized piezoelectric generator that can be integrated with the monitoring system, but the existing piezoelectric generator is periodically excited and the piezoelectric sheet is subjected to alternating tension. Compressive stress, so the reliability is low and the effective bandwidth is narrow

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