A battery-powered strain multi-dimensional force sensor fault diagnosis system

Abstract

The invention relates to a battery-powered multi-dimensional force strain sensor fault diagnosis system, an MSP430 single-chip microcomputer is used as a core, a constant current excitation and matrix scanning survey method is adopted for realizing the fault diagnosis for all channels measuring circuits of the multi-dimensional force strain sensor, and the system comprises a hardware system and a software system. The hardware system is formed by a power supply management module, a constant current excitation module, a matrix switch scanning module, a signal conditioning module, a signal processing and controlling module, a logic control module and a man-machine interface module. The software system separately adopts a threshold value comparison method and a look-up table method in a fault scanning process to diagnose the short-circuit fault and open-circuit fault of the sensor, and a multiple circulation scanning method is adopted to distinguish the short circuit / virtual short circuit and open circuit / virtual open circuit fault condition according to the times of fault occurring. According to the invention the system can realize the online automatic detection for short circuit, virtual short circuit, open circuit, virtual open circuit fault of at most 8 channels of all channels measuring circuits of the multi-dimensional force strain sensor, and the system is battery powered and portable.

Description

technical field [0001] The invention relates to the field of sensor fault detection, and is a fault diagnosis system for a battery-powered strain multi-dimensional force sensor, in particular, a system with an MSP430 single-chip microcomputer as the core, which uses constant current excitation and matrix scanning methods to realize the corresponding strain-type multi-dimensional force sensor. A battery-powered fault diagnosis system for on-line automatic detection of short circuit, open circuit, virtual short, and virtual break faults in the channel measurement circuit. Background technique [0002] The strain type multi-dimensional force sensor can decompose and output the space vector force / torque along the Cartesian coordinate system, and is widely used in scientific experiments and industrial automation, such as the wind tunnel strain balance for measuring the force / torque of the aircraft model in each direction in the wind tunnel test , the wheel force sensor in the com...

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Problems solved by technology

The existing literature "Design and Implementation of a Self-Validating Pressure Sensor" (Zhigang Feng, Qi Wang, and Katsunori Shida, IEEE Sensors Journal, 2009, Vol. 9, No. 3) uses the wavelet packet decomposition method and supports The vector machine multi-level classification method performs consistency check on its measurement data to diagnose sensor faults, but the proposed method is mainly used to identify fault phenomena such as bias, drift, spikes, oscillations, and blocking of sensor data, rather than diagnosing specific faults. The type and location of the measurement circuit fault

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