A self-powered axle detection device

Abstract

The invention relates to a self-power wheel shaft detection apparatus, and belongs to the technical field of detection. The self-power wheel shaft detection apparatus is characterized in that a wheel shaft is arranged on a vehicle frame, and an end cap is arranged on the housing of the vehicle frame; a shaft sleeve with a ring slot is arranged at the end portion of the wheel shaft, and one end of the shaft sleeve sleeves the wheel shaft and is abutted against an inner ring of a bearing; the same number of excitation magnets are uniformly distributed on two side walls of the ring slot of the shaft sleeve; a group of piezoelectric oscillators and a reed are arranged on a boss of the housing of the vehicle frame; two sides of the free end of the reed are each provided with a pressure plate, a group of suspension magnets and an excited magnet which is arranged at the end portion of the pressure plate; attractive force is formed between the excited magnet and the excitation magnets; each piezoelectric oscillator is formed through bonding of a substrate and a piezoelectric patch, and then forms an arc cantilever beam; the piezoelectric oscillators are symmetrically arranged at two sides of the reed; a pad is connected between the substrate of the piezoelectric oscillator adjacent to the reed and the reed in a pressed manner, and a separation pad is connected between the fixed ends of the adjacent piezoelectric oscillators in a pressed manner; suspended magnets are arranged at the end portions of the piezoelectric oscillators; and the like poles of the suspended magnets and the suspension magnets are arranged in an opposite manner.

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 self-powered wheel shaft detection device. Background technique [0002] Rail train wheelset is the key to ensure the safe operation of rail vehicles. In the past, the health status of key components such as 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 received a lot of attention. Widely concerned by domestic and 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 install various sensor monitoring system...

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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