Air coupling ultrasound-based ballastless track plate detection device

Abstract

The invention relates to an air coupling ultrasound-based ballastless track plate detection device. The output end of a signal transmitting and receiving element is connected with the input end of a data processing unit through an A / D conversion circuit and a built-in amplifier; the data processing unit is connected with a storage unit; the signal transmitting and receiving element emits transmitting signal to a signal transmitting probe group; the signal transmitting and receiving element receives the echo signals of a signal receiving probe group through an external amplifier; and the signal transmitting probe group and the signal receiving probe group are horizontally arranged above a steel track. With the method disclosed by the invention adopted, the comprehensive scanning of the interlayer delamination and water seepage of a track plate and a mortar layer, the block missing of the track plate, and the internal deep crack of the track plate can be performed. The air coupling ultrasound-based ballastless track plate detection device has the advantages of many defect scanning types, wide detection linear range and high detection efficiency. With the air coupling ultrasound-based ballastless track plate detection device adopted, the visual display of a detection result is realized; and a bonding condition between the track plate and the mortar layer is judged according to the phase change condition of echo signals.

Description

technical field [0001] The invention relates to the technical field of ultrasonic nondestructive testing, in particular to an air-coupled ultrasonic-based ballastless track slab testing device. Background technique [0002] With the planning of my country's high-speed rail construction, the high-speed rail network will be built more intensively, and the track will inevitably be aging and damaged under the influence of long-term operation and complex external environment. Under the high-speed and high-density operation of the train, the damage to the ballastless track is more serious. The track slab is an important part of the modern ballastless track railway. The damage of the mortar layer of the ballastless track slab will cause voids and gaps between the track slab and the mortar layer under the action of traffic load and temperature stress. The damage of the mortar layer will affect the running of the train and cause harm to the safety of the train. Studies have shown t...

AI Technical Summary

Problems solved by technology

The impact echo method is very effective in detecting and locating cracks, delaminations and voids in concrete, but the detection resolution and sensitivity are low. At the same time, the excitation source of the impact echo method is generated by manual knocking, and the detection speed is slow. Contradictory demands for high-speed railway inspection speed

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