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Expert system based numerically-controlled machine tool fault diagnosis system

A fault diagnosis system, a technology of CNC machine tools, applied in general control systems, control/regulation systems, program control, etc., can solve the problem of lack of remote data communication function, lack of equipment operating status monitoring, and the inability of traditional controllers to keep up with fault diagnosis technology and other problems to achieve the effect of improving reliability

Inactive Publication Date: 2015-03-04
葛伟迪
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Problems solved by technology

[0004] The existing CNC machine tool control system cannot meet the increasing needs of online diagnosis and remote maintenance of equipment. The traditional controller cannot keep up with the development of advanced fault diagnosis technology, lacks equipment operation status monitoring, and the fault diagnosis function cannot be realized online. Acquisition, processing, analysis and diagnosis of a large amount of monitoring data, without remote data communication function

Method used

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  • Expert system based numerically-controlled machine tool fault diagnosis system
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  • Expert system based numerically-controlled machine tool fault diagnosis system

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Embodiment 1

[0023] The present invention mainly studies bus-based data acquisition and processing technology and fault intelligent diagnosis technology, and obtains a set of numerical control system intelligent diagnosis module with remote fault diagnosis function, which can be used in conjunction with numerical control system, thereby improving the reliability of numerical control system operation . to combine figure 1 , figure 2 and image 3 As shown, a fault diagnosis system for CNC machine tools based on an expert system in this embodiment includes a fault detection system for multi-sensor real-time data collection and a fault diagnosis system based on an expert system is developed on the basis of processing and intelligent analysis of collected data. diagnostic system. figure 1 The sensors in the system include temperature sensors, vibration sensors and noise sensors; signal acquisition includes the acquisition of temperature signals, vibration signals, and noise signals, among w...

Embodiment 2

[0032] An expert system-based fault diagnosis system for CNC machine tools in this embodiment is basically the same as that in Embodiment 1, except that the temperature sensor and the temperature measuring unit are different. The temperature signal acquisition method in this embodiment is adopted to improve the accuracy of temperature acquisition, so as to provide reliability and stability of the entire diagnostic system.

[0033] Regarding temperature signal acquisition, the traditional Pt1000 temperature signal processing circuit adopts ordinary bridge circuit or four-wire constant current source drive circuit. Among them, the main defects of the ordinary bridge circuit are: ① Since the reference voltage of the AD converter in the ordinary bridge circuit is an independent high-precision reference voltage source, the digital output of the AD converter has a nonlinear relationship with the Pt1000 resistance ;② Ordinary bridge circuits must use high-precision reference voltage ...

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Abstract

The invention discloses an expert system based numerically-controlled machine tool fault diagnosis system and belongs to the technical field of fault diagnosis. Temperature sensors are connected with a temperature measuring unit which sends multi-channel temperature signals acquired by the multi-channel temperature sensors to a 32-bit processor main control panel; multi-channel vibrating sensors and multi-channel noise sensors are all connected with a data acquisition card which sends multi-channel vibration signals and multi-channel noise signals which are acquired through a bus interface technology to the 32-bit processor main control panel. The fault diagnosis system comprises a human-computer interaction interface and monitoring main program modules. A fault detection system is connected with the human-computer interaction interface, and fault maintenance personnel and technicians perform human-computer interaction through the human-computer interaction interface. By means of the system, acquired data are analyzed and processed to be sent to the fault diagnosis system, diagnosis results are analyzed, human-computer interaction is performed, and accordingly, the numerically-controlled system operation reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tool fault diagnosis, and more specifically relates to a numerical control machine tool fault diagnosis system based on an expert system. Background technique [0002] CNC machine tools are developing rapidly in China. It has high precision and good economic performance, and has been more and more widely used in the production field. The CNC machine tool is mainly composed of two parts: the machine tool body and the CNC system. It is a very complex system, involving multiple application fields, and has the characteristics of technology-intensive and knowledge-intensive. In precision CNC machine tools, high-performance specialized CNC machine tools, There is a large gap between our country and foreign countries in terms of reliability and accuracy retention of high-end CNC machine tools such as compound function CNC machine tools, and the application of fault warning and diagnosis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/406
CPCG05B19/406
Inventor 葛伟迪韩家明方挺谷文平
Owner 葛伟迪
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