Eddy-signal-recognition-technology-based full-automatic data acquisition method

A technology of data acquisition and signal recognition, applied in the direction of material magnetic variables, etc., can solve the problems of reducing system applicability, increasing system components, expanding system volume, etc., and achieves the effects of strong real-time performance, cost saving and high reliability
CN104749243AInactive Publication Date: 2015-07-01CHINA NUCLEAR POWER OPERATION TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NUCLEAR POWER OPERATION TECH
Publication Date
2015-07-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of the non-destructive testing technology for a nuclear power station and in particular relates to an eddy-signal-recognition-technology-based full-automatic data acquisition method. The eddy-signal-recognition-technology-based full-automatic data acquisition method comprises the following steps: 1. setting the detection boundary and the data recording boundary and building characteristic signal models of eddy digital signals at the boundary positions; 2. controlling a probe to enter a to-be-detected pipeline through a pipe opening and move inwards at designated speed; 3. acquiring an eddy digital signal in real time by an eddy current instrument, and when the acquired signal is matched with the characteristic signal for detecting the boundary, stopping advancing; 4. starting to acquire data automatically, enabling the probe to move back from the to-be-detected pipeline outwards after the probe reaches the detection boundary, simultaneously, starting to acquire the signal automatically until the probe reaches the recording boundary; and 5. stopping automatic data acquisition, after the probe reaches the recording boundary, stopping data acquisition, and enabling the probe to move back out of the to-be-detected pipeline. Compared with the method that a sensor is additionally arranged at the pipe end of a push-pull device, the signal-recognition-based positioning method can save the cost and has high reliability.
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Description

Technical field

[0001] The invention belongs to the technical field of non-destructive testing of nuclear power plants. Background technique

[0002] The heat transfer tube of the steam generator is a key component of the integrity of the pressure boundary of the primary circuit of a nuclear power plant. At the same time, it is the weakest link in the entire loop. At present, the most effective way to detect the heat transfer tube is eddy current nondestructive testing.

[0003] The entire eddy current detection system is usually composed of multiple subsystems, which can be divided into three parts: signal system, positioning scanning system and auxiliary system. The signal system mainly includes eddy current signal acquisition system, eddy current signal analysis software, eddy current instrument, probe and other related components. In the eddy current testing process, signal acquisition is a prerequisite for the whole process. The signal acquisition software integrates software...

Claims

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