Aid device for setting inspection standard

Abstract

The invention provides an aid device for setting inspection standard, including: a frame profile operation means for performing frame division of waveform data, calculating a frame profile with matrix-form data structure of characteristic quantity recorded by characteristic quantity axis and frequency axis for each frame; a profile operation means for acquiring a plurality of frame profiles on the same waveform data determined by the frame profile operation means, and determining a profile on the waveform data with matrix-form data structure of characteristic quantity recorded by characteristic quantity axis and frequency axis from the plurality of frame profiles; a storage means for storing the profile determined by the profile operation means; and a simultaneous operation means for processing value of characteristic quantity at a designated position of the profiles on a plurality of wave-form data stored in the storage means.

Description

technical field [0001] The present invention relates to an inspection standard determination support device. Background technique [0002] Rotary equipment incorporating motors is widely used in automobiles, home appliances, and the like. For example, in the case of a car, rotating equipment is installed everywhere in the engine, power steering, self-adjusting seats, and transmission. In addition, home appliances include refrigerators, air conditioners, washing machines, and other various products. When these rotary devices are actually operated, sounds are generated with the rotation of motors and the like. [0003] Such sounds include those that inevitably occur with normal actions and those that occur with abnormalities. The causes of the abnormal sound accompanying the defect include abnormality of the bearing, abnormal internal contact, imbalance, foreign matter, etc. For example, abnormal noises that occur once a gear rotates once are caused by missing teeth, forei...

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Problems solved by technology

[0014] In addition, since there are many setting modes for only one parameter, it is difficult to compare the calculation results of feature quantities while changing the settings one by one, and it is also difficult to determine an appropriate parameter.

In addition, it is difficult to confirm which of the plurality of feature quantities expresses the most characteristic, and there are many combinations of parameters, and therefore a lot of time and manpower are required.

[0015] In this way, the number of feature quantities and parameters used in the abnormal sound inspection system is large, feature quantity search and parameter adjustment are complicated, and even if this feature quantity search is performed, it may not be possible to separate normal (defective products) and abnormalities with high accuracy. (Defective product) characteristic quantity, etc.

In this case, since the types of feature quantities to be selected and the parameter space are infinite, the reason why the two groups cannot be separated is that it is difficult to judge whether (1) the information for data separation is not available at all, or (2) in the infinite parameter space not enough search

[0016] Therefore, even if it is the case of (1) in essence, if it cannot be explained with scientific convincing force, sometimes the search of infinite space is carried out, and the manpower is wasted in vain

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