Multi- sensor system fault self-diagnosis method

A multi-sensor, system failure technology, applied in the direction of instruments, measuring devices, measuring electricity, etc., can solve problems such as unreliability, increase system complexity and system construction cost, and achieve the effect of increasing reliability and simplifying system structure.

CN101266273AInactive Publication Date: 2008-09-17徐立军
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-09-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a fault self-diagnostics method for multi-sensor system, which includes the following steps: firstly, carrying out linear analysis to the information obtained from each sensor of the multi-sensor system having relativity output, and then comparing corresponding relativity and setting threshold value to realize sensor array fault self-diagnostics of the multi-sensor, wherein, as the number of the sensor having relativity output is two, fault-diagnostics of the sensor system can be realized thereby providing alarm information; as the number of the sensor having relativity output is three, fault-diagnostics of the sensor system can be realized thereby providing alarm information and isolating the fault to guarantee normal operation of the system. The effects of the invention are that self-diagnostics, alarm and fault-isolation for the sensor are realized and single system for monitoring sensor operation status is saved thereby simplifying the system configuration and increasing stability of the self-diagnostics system through using the relativity between the information measured by each sensor in the multi-sensor system and using multi-channel measuring signal.
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Description

technical field

[0001] The invention relates to a multi-sensor system fault self-diagnosis method, which can be used for fault diagnosis, alarm and fault isolation of the multi-sensor system. Background technique

[0002] In the field of industrial monitoring, it is usually necessary to use a multi-sensor system to monitor the same measurement object or different measurement objects with correlations synchronously to achieve information complementation and fusion, to expand the application field of sensors, to broaden the measurement range, and to improve measurement accuracy. and robustness. However, the increase in the number of sensors not only increases the complexity of the measurement system, but also increases the failure probability of the system. Therefore, the above factors put forward higher requirements for the fault diagnosis capability of the multi-sensor system itself, so as to ensure the reliability of process monitoring and parameter measurement, and ensure...

Examples

Embodiment Construction

[0023] Such as figure 1 Shown, a kind of multi-sensor system fault self-diagnosis method of the present invention comprises the following steps:

[0024] Step 1, initialization, to determine the self-test status and number of sensors whose output signals are correlated in the known multi-sensor system, for a multi-sensor system including t sensors with correlated outputs, that is, the output signals are correlated The number of sensors is t. When t is greater than 3, go to step two; when t=3, go to step three; if t=2, go to step four.

[0025] Step 2, when the number of sensors used in the sensor system is t and t>3, first judge whether m sensors have undergone self-inspection, and 0

[0026] If there i...