Limit trigger type platinum resistance temperature sensor

Abstract

The invention provides a limit trigger type platinum resistance temperature sensor. The limit trigger type platinum resistance temperature sensor is characterized in that a temperature measuring portion and a fusing portion are arranged in a metal protective tube of a temperature measuring probe of the limit trigger type platinum resistance temperature sensor side by side, are filled with heat-conducting temperature-resistant insulating filling materials and are fixed by the aid of the heat-conducting temperature-resistant insulating filling materials, and setting spaces of the temperature measuring portion and spaces of the fusing portion are isolated from one another in an insulated manner by an insulating isolation component. According to the technical scheme, the limit trigger type platinum resistance temperature sensor has the advantages that motor cars or high-speed rail trains still can be subjected to reliable and accurate temperature monitoring and protecting by the aid of the limit trigger type platinum resistance temperature sensor even if a platinum resistance temperature sensing core is in abnormal states such as open circuit, short circuit, flash alarm and false alarm states and the like under the conditions of vibration, impact, rain and disturbance of complicated and versatile electromagnetic fields and even when the platinum resistance temperature measuring core fails.

Description

technical field [0001] The patent of the present invention relates to a platinum resistance temperature sensor for monitoring the temperature state of each key part in the high-speed traction motor drive system of a motor vehicle and a high-speed rail train. Background technique [0002] According to the technical specifications for the operation of bullet trains and high-speed rail trains, it is necessary to strictly monitor the working temperature of each part of the high-speed traction motor iron core, axle box and gearbox in real time. When the temperature exceeds the specified temperature limit, an alarm will be issued, and even an order to stop will be executed to ensure the safety of the bullet train or high-speed rail train. . The platinum resistance temperature sensor has technical advantages such as high precision, stability, and reliability, making it the first choice for temperature detection of bullet trains and high-speed trains. The resistance temperature sen...

AI Technical Summary

Problems solved by technology

[0003] The platinum resistance temperature sensor is installed on the bogie of the train, and it is subjected to wind, rain, flying rocks, and is in a harsh working environment such as shock, vibration, and sudden temperature change. The structure and quality of the platinum resistance temperature sensor are facing the above conditions. Yan Jun’s challenge is very likely to cause occasional open or broken circuits, resulting in failure of temperature monitoring, which is a major hidden danger of train operation accidents

[0004] The platinum resistance temperature sensor is also in a harsh working environment with variable and complex electromagnetic interference, surrounded by electrical components such as frequency conversion controllers, thyristors, relays, contactors, or operating in thunderstorm weather, suffering from lightning strikes Such as sudden electromagnetic interference, prone to flash or false alarms, it is difficult to distinguish the authenticity of abnormal signals, which will seriously interfere with the safe and stable operation of bullet trains or high-speed trains

The current technical means to solve this technical problem is to implement electronic filtering or program filtering of interference signals in the signal processor or central processing unit, but the accuracy and reliability of filtering interference are limited by the technical level, and it is difficult to obtain intelligent filtering effect , reliability and stability are difficult to ideally last and maintain, and the design and implementation costs are too high

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