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

A multi-dimensional force sensor and fault diagnosis system technology, applied in the direction of measuring electrical variables, electronic circuit testing, instruments, etc., to achieve the effect of low power consumption and portability

Active Publication Date: 2018-01-26
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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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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  • A battery-powered strain multi-dimensional force sensor fault diagnosis system
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  • A battery-powered strain multi-dimensional force sensor fault diagnosis system

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing and accompanying table.

[0019]The design idea of ​​the present invention is: the short circuit of each bridge arm of strain gauge multi-dimensional force sensor measuring circuit, lead wire, open circuit fault all can cause the variation of resistance value between its output lead wire or between output lead wire and sensor substrate (structural steel body), therefore, Constant current can be directly fed into the output leads of the sensor measurement circuit, and the load resistance value can be calculated by detecting the voltage signal output by the constant current to diagnose short circuit and open circuit faults. For sensors with different resistance values ​​of strain gauges, the present invention uses a digital-to-analog converter (DAC) combined with a voltage-current conversion (V / I) circuit to build a constant current excitation circuit, and the control core contro...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L25/00G01R31/28
CPCG01L25/00G01R31/2829
Inventor 杨双龙徐科军邵春莉舒张平许伟
Owner HEFEI UNIV OF TECH
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