Non-contact synchronous measuring instrument for subgrade and rail vibration
A synchronous measurement, non-contact technology, used in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of large error, low precision, and cumbersome testing methods, achieve intelligentization, avoid precision reduction, and eliminate The effect of human factors
Inactive Publication Date: 2010-12-15
TIANJIN UNIV
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The invention relates to a non-contact synchronous measuring instrument for subgrade and rail vibration. A CCD (Charge Coupled Device) drive circuit is respectively connected with a CCD video signal binaryzation processing unit, an A/D and SRAM (Static Random Access Memory) working time sequence controller and an address counter time sequence generator and used for providing a necessary working pulse for a CCD and generating an interface signal between the CCD drive circuit and a data acquisition card; and the output of the CCD video signal binaryzation processing unit and the outputs of the A/D and SRAM working time sequence controller and the address counter time sequence generator are connected with a data acquisition interface circuit based on a parallel interface. By computer control automatic measurement, the invention greatly prevents the influence of human factors, realizes the intellectualization of detection, solves the synchronous problem of two different vibration frequencies and vibration amplitudes by non-contact synchronous measurement and can carry out software calibration at random, thereby preventing precision reduction caused by long-term use. A photoelectric probe is just dedusted regularly without replacing a detecting probe regularly.
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