METHOD acoustic emission monitoring of quality of welded rail joints AND DEVICE FOR ITS IMPLEMENTATION

摘要

1. A method for acoustic emission monitoring the quality of welded joints of the rails, comprising the steps that produce the joint welding, burr stump, acoustic emission signals were recorded during the cooling of the weld is measured counting rate of acoustic emission signals to divide time monitoring intervals for the counting rate exceeding acoustic emission signal threshold in at least one of the intervals, judging the quality of the weld, characterized in that the median power is additionally determined acoustic emission signals for provide thresholds for count rate average values ​​and median energy localized acoustic emission signals into two equal time intervals during the cooling of the weld and when exceeding the counting rate and the energy of their median threshold signal on any of the slots brakuyut.2 welded joint. A multichannel acoustic emission device for controlling the quality of welded joints of the rails consisting of two channels, each of which consists of series-connected acoustic transducer, a preamplifier, a bandpass filter, the main control amplifier and an analog-digital converter, oscillator calibration pulses to analog converter , the comparator, the central processor of the computer, the two keys, the first key and the first input coupled to an output acoustic etc. the forming, and the second input of the first switch is connected to the second input of the second switch and the input of a two-position key, the first input of the second switch is connected to a preamplifier output, wherein the first on-off outlet