An online intelligent detection method for foundation braking

Abstract

The invention discloses a foundation brake online detector and an intelligent detection method. The foundation brake online detector comprises a brake unit, a connecting rod composition, and a magnetostrictive displacement sensor. The connecting rod composition moves horizontally as a tread or a clamp of the brake unit moves. The magnetostrictive displacement sensor records the displacement of theconnecting rod composition, and calculates the speed and the acceleration which are compared with the initial displacement to obtain the real-time wear condition of the brake pad when the locomotiveis stopped or running, and to realize an online detection of the brake shoe wear and the braking action stroke. According to the foundation brake online detector and the intelligent detection method,the requirements of trains operating under severe working conditions can be met, and the online detection of train brake pad wear and action stroke can be achieved.

Description

technical field [0001] The invention relates to the technical field of railway locomotive foundation braking, in particular to an on-line detector for brake shoe (brake pad) wear and braking of a foundation brake unit of a railway vehicle and an online intelligent detection method under action stroke. Background technique [0002] With the continuous speed increase of railway locomotives in our country, the requirements of rolling stock for vehicle safety are also getting higher and higher. The basic braking unit of the railway locomotive is an important part to ensure the safety of the vehicle. When the locomotive brakes, the mechanical friction between the basic braking unit brake shoe (brake) and the wheel pair generates a braking force, which is used to ensure the emergency braking of the train. It can stop within the specified braking distance. [0003] At present, there are mainly two types of basic braking devices: brake caliper unit and tread brake unit; the brake c...

AI Technical Summary

Problems solved by technology

This invention has the following problems: 1. In this invention, the moving end of the displacement sensor is fixed on the connecting shaft between the brake shoe support rod and the brake shoe support. Since the output shaft of the tread brake unit does not move linearly along the horizontal axis when it is stretched out, Actually, it is a deflection movement, so there is a large error in the comparison between the above patent measurement and the actual wear value of the brake pad; 2. According to the basic braking principle, the above invention only needs one sensor to realize its function (see the function realization part for details); 3. .Because the sensor is installed outside the brake unit without protection, and the operating condition of the bogie is relatively harsh during the actual train operation, there are multi-dimensional vibrations and shocks

Atmospheric dust, powder produced by brake shoe wear, rain and snow, etc. will affect the life and accuracy of the sensor, and ultimately affect the wear detection of the brake shoe

4. The above-mentioned invention is externally installed with a displacement sensor, and the tread brake unit needs to be processed; 4. The above-mentioned patent is only applicable to the tread brake unit, and the structure of the brake caliper unit is not applicable

[0005] To sum up, the patent published in the patent document CN103171588B does not have the conditions for real vehicle operation monitoring, and it is still necessary to design and invent a new type of basic braking intelligent detection device and method, which has high detection accuracy and is compatible with the tread braking unit and the braking system. Clamp unit, and suitable for real vehicle running conditions

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