Portable ultrasonic detector for railway power supply net touching pin

Abstract

The invention discloses a portable ultrasonic detector for a railway power supply net touching pin. The detector is composed of a main controller, an ultrasonic signal stimulation receiving module, an input / output device and a power module. The main controller is composed of a single-chip field programmable gate array (FPGA). An ultrasonic stimulation receiving circuit of the ultrasonic signal stimulation receiving module emits a high-voltage pulse under the control of the FPGA to stimulate an ultrasonic transducer. The power module produces high-voltage direct current through a battery in a direct-current boosting mode. The ultrasonic transducer is connected with the pin and produces ultrasonic waves transmitted to the pin through a coupling agent. The ultrasonic waves are reflected by the end face or cracks of the pin and are received by the same transducer again. After operation is conducted on echo signals, echo waveforms are displayed on a screen, whether defects exist or not is automatically recognized, and the defects are used for further analysis. The portable ultrasonic detector has the advantages that operation is easy, and the detection efficiency is high; based on the single-chip FPGA, the structure is compact, power consumption is low, the weight is low, and requirements of detection on site are met due to battery power supply.

Description

Technical field [0001] The invention is a portable ultrasonic detector used for on-line non-destructive testing of stressed pins of railway power supply lines, and belongs to the field of instrumentation and non-destructive testing. Background technique [0002] In recent years, there have been too many accidents in the railway system caused by the quality defects of the power supply catenary components, which seriously affected the safety of power supply. At present, there are blind spots in the non-destructive flaw detection technology of bolts, nuts, pins and other parts in the daily inspection and maintenance of the power supply catenary equipment of electrified railways. There are no special tools and instruments to detect the important stressed parts of the catenary. Daily inspection of catenary components is limited to visual inspection, and only defects with obvious cracks can be found. Moreover, the skylight of the high-speed rail passenger line is at night. It is more d...

AI Technical Summary

Problems solved by technology

The daily inspection of catenary components is limited to visual inspection, and only defects with obvious cracks can be found, and the skylight of the high-speed railway passenger line is at night, so it is more difficult to find defects due to the influence of sight, especially for parts with inconspicuous cracks or internal defects Difficult to find, often only found when accidents seriously affect the safety of power supply driving

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