On-line fault diagnosis system for central air conditioner water system temp and flow sensor

A fault diagnosis system and flow sensor technology, applied in heating and ventilation control systems, heating and ventilation safety systems, space heating and ventilation, etc., can solve the problems of difficult detection of multiple sensor faults, difficult online diagnosis, difficult fault quantification, etc. problems, to achieve the effect of saving diagnosis costs, recovering economic losses, and shortening the diagnosis cycle

Inactive Publication Date: 2006-05-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

These current diagnostic methods have the following disadvantages: 1). It is difficult to detect multiple sensor faults; 2). There are certain difficulties in the quantification of faults; 3). It is difficult to perform online diagnosis

Method used

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  • On-line fault diagnosis system for central air conditioner water system temp and flow sensor

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Embodiment Construction

[0016] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the present invention mainly includes a data acquisition module 1, a noise filtering module 2, a steady-state data judgment module 3, a fault detection module 4, a storage module 5, a fault diagnosis module 6, a confidence judgment module 7 of a diagnosis result, and a data recovery Module 8 and Output Module 9.

[0018] The output end of the data acquisition module 1 is electrically connected to the input end of the filter noise module 2, the output end of the filter noise module 2 is electrically connected to the input end of the steady-state data judgment module 3, and the output end of the steady-state data judgment module 3 is connected to the input end of the steady-state data judgment module 3. The input end of the fault detection module 4 is electrically connected, the output end of the fault det...

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Abstract

The online fault diagnosis system for temperature and flow sensors of the central air-conditioning water system mainly includes data acquisition, noise filtering, steady-state data judgment, fault detection, storage, fault diagnosis, confidence judgment of diagnosis results, data recovery and output modules. Using the method of statistical mathematics, according to the energy conservation and mass conservation of the system, the online fault diagnosis is carried out for the drift fault of the temperature and flow sensor of the air-conditioning water system. Not only is it effective for the diagnosis of multiple sensor faults, but it can also accurately diagnose the location and size of the fault.

Description

Technical field: [0001] The invention relates to a fault diagnosis system for temperature and flow sensors of a central air-conditioning water system, in particular to an online fault diagnosis system for temperature and flow sensors of a central air-conditioning water system that uses statistical mathematics methods to detect and diagnose sensors online The invention belongs to the technical field of building environment equipment and control. Background technique: [0002] The emergence of building intelligent control system puts forward higher requirements for the sensors in the central air conditioner. To make the central air-conditioning system operate normally, there must be a good control and monitoring system, and the measurement signal of the sensor is the basis and basis of the control and monitoring system. In order for the control system to function effectively, the measurement of the sensor must be reliable. Otherwise, it will lead to unstable operation of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/02
Inventor 晋欣桥杜志敏
Owner SHANGHAI JIAO TONG UNIV
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