Fault detection instrument of rotary equipment based on acoustic emission technique

Abstract

The invention is a rotating equipment fault detector based on acoustic emission technology, which belongs to a rotating equipment fault detector. It consists of three parts: acoustic emission sensor, signal conditioning and automatic gain amplification module, and digital signal processing module. The signal conditioning and automatic gain amplification module includes a preamplifier (1), a digital potentiometer (2), an adder (3), a single-chip microcomputer (5) and a dual comparator (6) to form a closed control loop for automatic gain adjustment and a trap. Several parts such as filter (7), low-pass filter (8). The digital signal processing module includes DSP digital signal processor (11), Flash data memory (12), RAM data memory (13), RS232 serial port chip (14), programmable logic controller (15), keyboard (16), LCD Various parts such as display (17) form. This instrument has strong anti-environmental noise interference ability, good real-time instrument detection, rich information on equipment operation status, and is easy to realize miniaturization.

Description

technical field [0001] The invention relates to a rotating equipment fault detector, in particular to a device fault detector based on acoustic emission technology. Background technique [0002] The rotating equipment fault detector can be used to detect the running state of the rotating equipment, which has obvious economic and social benefits for ensuring the safe operation of the rotating equipment and avoiding major equipment accidents and process accidents. Existing fault detectors for rotating equipment use vibration sensors (acceleration, speed or displacement sensors) to pick up equipment vibration signals and use single-chip microcomputer technology for signal processing. The low-frequency disturbance signal will be picked up by the acceleration sensor, which will affect the test results and lead to misjudgment. Moreover, the vibration analysis method judges the fault through the analysis and processing of acceleration, displacement and other signals, which is equiv...

AI Technical Summary

Problems solved by technology

Existing fault detectors for rotating equipment use vibration sensors (acceleration, speed or displacement sensors) to pick up equipment vibration signals and use single-chip microcomputer technology for signal processing. The low-frequency disturbance signal will be picked up by the acceleration sensor, which will affect the test results and lead to misjudgment. Moreover, the vibration analysis method judges the fault through the analysis and processing of acceleration, displacement and other signals, which is equivalent to secondary signal processing. real-time detection; single-chip microcomputer-based data analysis and processing system has slow operation speed, low precision, relatively simple functions, and does not meet the requirements for real-time detection and analysis of collected signals

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