Mechanical part vibration fatigue load real-time monitoring sensor under impact load and design method

Abstract

The invention discloses a mechanical part vibration fatigue load real-time monitoring sensor under impact load and a design method, and belongs to the technical field of mechanical part vibration fatigue life monitoring. A circular ring mounting base of the vibration fatigue load monitoring sensor is used for bearing stress on the surface of the mechanical structure and monitoring in real time, wherein the vibration swing rod swings along with the vibration of mechanical parts during working; the elastic rod between the central connecting block and the circular ring mounting seat is deformed;therefore, the vibration characteristics of the measured position of the mechanical part during working are converted into the strain characteristics of the elastic rod. Real-time monitoring of the vibration characteristics of the surface of the mechanical part is realized through a strain measurement circuit mounted on the elastic rod; the structure vibration fatigue load information is transmitted to a computer monitoring platform through wireless transmission and is fed back to an operator in time, the vibration fatigue life of mechanical parts is analyzed, sudden accidents are prevented, and safe and reliable operation of mechanical equipment is ensured.

Description

technical field [0001] The invention relates to a strain-type mechanical component surface vibration fatigue load real-time monitoring sensor and a design method, in particular to a mechanical structure surface acceleration strain synchronous real-time monitoring sensor under impact load, which belongs to the technical field of mechanical component vibration fatigue life monitoring. Background technique [0002] Structural fatigue refers to the phenomenon that under the action of cyclic loading, some points or some points of the structure produce local permanent damage, and form cracks or even completely break after a certain number of cycles. The problem of structural fatigue life prediction has always been an important topic in the field of machinery. . The failure of complex mechanical systems, such as accidents of aircraft engines, automobiles, nuclear power plants, and large tunnel boring machines, will cause heavy casualties, huge economic losses, and environmental dam...

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Problems solved by technology

The failure of complex mechanical systems, such as accidents of aircraft engines, automobiles, nuclear power plants, and large tunnel boring machines, will cause heavy casualties, huge economic losses, and environmental damage. Therefore, the fatigue monitoring of engineering structures needs to be solved urgently; at present, For fatigue monitoring, most rely on traditional strain sensors to monitor the surface strain of the structure in real time, and regularly analyze and calculate the monitoring data to obtain the fatigue life of the structure; when mechanical equipment is subjected to impact loads, the surface of the structure is accompanied by high frequency in addition to cyclic stress. The existence of these shock vibrations will lead to rapid degradation of the performance of mechanical parts, and the fatigue life limit will be reached in advance, which will seriously reduce the service life of mechanical equipment and easily cause accidents; in structural fatigue monitoring, if traditional strain sensors are used The method used simultaneously with the acceleration sensor will make the monitoring system bulky, and it is impossible to realize the mapping between the cyclic stress and vibration characteristics of a single point on the surface of the structure when the part is subjected to high-frequency loads. And vibration characteristics of mechanical structure vibration fatigue load monitoring sensor system is of great significance

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