Railcar Bogie Temperature Sensor with Tangential Wireless Board
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Solution Overview
Problem
In railcar bogies, reducing the projection of sensor units to prevent damage from flying stones compromises the installation area and degree of freedom of attachment, necessitating a solution that minimizes both projection and installation area while maintaining effective attachment and temperature detection.
Innovation Solution
A wireless communication function-equipped temperature sensor unit is designed with a temperature sensor, a wireless communication board, and a battery arranged to overlap each other when viewed from the normal direction, with the wireless communication board positioned along the tangential direction of the rotating body, reducing projection and installation area, and a housing that includes a thermal conduction sheet and heat insulating member for stable heat transfer and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of projection of the sensor unit from the axle box is reduced to prevent damage from flying stones, then the reliability of the sensor unit is improved, but the installation area increases and the degree of freedom of attachment deteriorates
Solution Approach 1:
The wireless communication board is arranged along the tangential direction of the rotating body, changing the spatial orientation from radial to tangential. This dimensional repositioning allows the board to be located away from the temperature sensor while maintaining a compact projection, thus protecting the sensor unit from flying stones while preserving attachment flexibility through proper spatial arrangement of components
2Reliability
If the sensor unit is arranged compactly to reduce projection, then the reliability is improved, but the internal arrangement complexity increases
Solution Approach 1:
The temperature sensor, battery, and wireless communication board are arranged so as to overlap one another when viewed from the normal direction of the wireless communication board. This nested arrangement allows multiple components to occupy overlapping spatial projections, reducing the overall footprint and protecting the sensor unit from flying stones while maintaining organized internal structure through hierarchical component placement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the projection and installation area of the sensor unit, maintaining the degree of freedom of attachment and preventing damage from flying stones while ensuring accurate temperature detection and secure attachment to the railcar bogie.
Implementation Method 1
a temperature sensor configured to detect a temperature of the outer ring
Implementation Method 2
a conversion circuit configured to convert an analog temperature signal into a digital temperature signal
Implementation Method 3
a wireless communication module configured to transmit the digital temperature signal as a wireless signal
Implementation Method 4
a thermal conduction sheet provided between the contact member and the temperature sensor
Implementation Method 5
a heat insulating member surrounding the battery
Data Source
AI summary
A wireless communication function-equipped temperature sensor unit includes: a temperature sensor; a wireless communication board including a conversion substrate including a conversion circuit configured to convert an analog temperature signal into a digital temperature signal, the analog temperature signal being output from the temperature sensor, and a wireless communication module mounted on the conversion substrate and configured to transmit the digital temperature signal as a wireless signal.