This paper presents a method based on strain theory to test temperature stress of seamless rail. An easy-to-design interface circuit can measure very small-percentage capacitance variations of the differential capacitive sensor, which measure the strain of rail. The output voltage of the interface circuit is a linear function of capacitance change. The simulation results using SPICE show a good correspondence with the theoretical analysis. A sensitivity of 1.34x1012 V/F was given according to the simulation results.
Application of capacitive displacement sensor to testing temperature stress of seamless rail
2004
5 Seiten, 10 Quellen
Conference paper
English
Ultra-High-Frequency Capacitive Displacement Sensor
Online Contents | 1994
Ultra-High-Frequency Capacitive Displacement Sensor
NTRS | 1994
|Capacitive Displacement Sensor With Frequency Readout
NTRS | 1989
|Method for testing actual locking rail temperature of seamless track on large-span bridge
European Patent Office | 2023
|