Steel rail fracture vehicle-carrying non-contact fast monitoring technique

Abstract

The invention relates to a steel rails fracture vehicle-mounted non-contact fast detection technique, comprising n wheel pairs, 2n sensors and 2n resonance demodulation convertors, wherein n wheel pairs are arranged in locomotive and vehicle; the 2n sensors are positioned on 2n axle boxes of the wheel pairs, which are used for detecting the wheel impact situation caused by fractured rails; 2n sensor signals are transported in parallel and synchronously to 2n corresponding matching resonance demodulation convertors; 2n resonance demodulation signals are transported in parallel to 2n corresponding AD channel of computer, which are output by 2n resonance demodulation convertors; the resonance demodulation signals are controlled by a plurality of rotational speed control signals output by a plurality of rotational speed interfaces; the speed automatic tracking and uninterrupted continuous sampling is processed to obtain 2n continuous samples which is obtained from the monitoring of each sensor to each trail and divided into two groups; the samples are sent to a computer fractured rail diagnosis expert system, which are real-time analyzed, diagnosed and detached out of the steel rails fracture information by the computer fractured rail diagnosis expert system; the real-time mileage coordinates are obtained from locomotive monitor system; the steel rails fracture information sends out the alarm through the 485 interface together with the real-time mileage coordinates.

Description

technical field [0001] The invention relates to a vehicle-mounted non-contact rapid monitoring technology for rail fracture, which belongs to the category of mechanical fault detection and diagnosis technology, and is mainly used for non-contact rapid monitoring and diagnosis of fracture faults of special heavy-duty freight railway rails. Background technique [0002] Existing railway rail fracture monitoring devices are divided into two types: static monitoring and dynamic monitoring. Static monitoring technology is achieved by manually operating a certain detection device for continuous monitoring along the surface of the rail; dynamic monitoring is to install the monitoring device on a special monitoring vehicle, and let the monitoring vehicle drive slowly at a speed of about 30km / h. Realized by continuous monitoring of the rail surface. The technologies used for the above two types of detection include magnetic flaw detection technology and eddy current technology. Its...

AI Technical Summary

Problems solved by technology

The disadvantage is that the monitoring speed is slow and cannot match the normal operating speed of the line. Either a special inspection vehicle or inspection time must be arranged, and normal operation must be stopped, which will affect production and cause economic losses; Manual detection is carried out at intervals, but because of the long train (for example, several kilometers) and high density (for example, one train passes every t=15 minutes) of the freight line, it is calculated at a speed of 80 km / h and a train length of 3 km. time reaches t 1 =3 / 80*60=2.25 minutes, then the monitoring time is only dt=t-t 1 = 12.5 minutes, the time to move the monitoring equipment up and down the track, plus the avoidance time to ensure personal safety, the remaining monitoring time is only a few minutes, and major accidents to equipment and people will inevitably occur

The key factor causing this situation is the slow monitoring speed of monitoring technology

In addition, due to the slow speed of the existing above-mentioned monitoring technology, it is impossible to monitor frequently, and the rail fracture of the heavy-duty railway may occur in the time interval between two detections and develop into an accident state, so high-speed, capable of operating trains is required New technologies installed on locomotives or carriages that can monitor frequently in real time

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