Current type multi-parameter sensor for monitoring state of train running gear

Abstract

The invention discloses a current type multi-parameter sensor for monitoring the state of a train running gear. The current type multi-parameter sensor is composed of a vibration sensing and detectingcircuit assembly, a temperature sensing assembly, an outer packaging assembly, a signal connecting assembly, a monitoring circuit and the like. The beneficial effects of the sensor are that the vibration sensitive and detection circuit assembly forms a shielding layer, and the outer packaging assembly forms a shielding layer, thereby effectively inhibiting the radiation electromagnetic interference under the operation condition of a train; the sensitive element adopts an annular shearing piezoelectric ceramic crystal and is fixed by a thermal shrinkage ring, so that the problems of temperature drift and working temperature limitation of an existing train running state monitoring sensor are solved; the sensor can extract three state parameters of vibration, impact and temperature of a monitored object at the same time, and the problem that the installation space of a train running gear is limited is solved. A sensor detection circuit adopts a double-charge amplification and twisted pair current output mode, and conduction interference in the signal transmission process and common-mode interference on a signal line are effectively suppressed.

Description

technical field [0001] The invention relates to a special sensor for train running state monitoring and fault diagnosis, in particular to a current type multi-parameter sensor for the state monitoring of a running part of a train. Background technique [0002] Train operation safety status monitoring is an important part of the railway traffic safety guarantee information system. It realizes real-time monitoring of the running status of trains in operation through on-board sensors and monitoring devices, and can detect vehicles or parts in poor operating status in time. Vehicle maintenance provides first-hand data, which is of great significance to ensure the safety of railway traffic and improve the maintenance level of rolling stock. As one of the three foundations of information technology, sensor technology is a high-tech that is being developed by developed countries. The sensor is similar to the sensory organs that human beings must rely on in order to obtain external...

AI Technical Summary

Problems solved by technology

Practice has shown that the separate shaft temperature monitoring and alarm is not comprehensive and incomplete. Although the monitoring effect has been improved to a certain extent through the method of comprehensive monitoring of temperature and vibration, there are still some problems: the vibration shock monitoring sensor will be damaged due to strong electromagnetic Interference effects lead to misdiagnosis and misjudgment, and at the same time, misdiagnosis or missed diagnosis caused by the failure of sensitive components cannot be avoided

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