Method, device and system for detecting vibration of arm frame of engineering machine, and engineering machine

Abstract

Disclosed is a method for detecting the vibration of an arm rest of engineering machinery. The method comprises: reading a rotation angle of an arm rest in a horizontal plane and a rotation angle of the arm rest in a vertical plane at multiple points of time (S102); calculating three-dimensional coordinates of an end portion of the arm rest at each point of time according to the length of the arm rest and the rotation angle in the horizontal plane and the rotation angle in the vertical plane read at each point of time (S104); obtaining, according to the three-dimensional coordinates at each point of time obtained through calculation, a condition of the three-dimensional coordinates changing with time (S106). The method conveniently detects the vibration of an arm rest in different gestures in three-dimensional directions, is more intelligent and automatic, avoids the work of manually recording the coordinates of the end portion of the arm rest, and obtains a more accurate detection result. Also disclosed are a device and a system for detecting the vibration of an arm rest of engineering machinery by using the foregoing method and engineering machinery comprising the system.

Description

technical field [0001] The invention relates to the technical field of vibration parameter measurement, in particular to a method, device, system and construction machinery for detecting vibration of a boom of construction machinery. Background technique [0002] In the research work related to construction machinery with a jib, it is often necessary to study the vibration of the jib, that is, the stability of the jib. Taking the vibration of the boom of a concrete pump truck as an example, for the detection of the vibration parameters (mainly including vibration displacement and vibration frequency) of the boom, the detection methods in the prior art mainly include manual measurement, the use of cable sensors or acceleration sensors or infrared sensors. distance sensor etc. Among them, the method of manual measurement is generally to hang a rope as a sign at the end of the measured jib, record the change of the distance between the rope and the ground through manual measur...

AI Technical Summary

Problems solved by technology

[0003] The manual measurement method in the above-mentioned detection method is time-consuming, labor-intensive, heavy workload, difficult to collect data, and low in accuracy, unable to achieve real-time monitoring of boom vibration parameters, which is not conducive to analysis

However, other methods using cable sensors, infrared sensors, and acceleration sensors can only detect the vibration displacement of the end of the boom, and cannot record and analyze the influence of the boom attitude on the vibration of the boom

Specifically, for example, when using an acceleration sensor, such as a single-axis acceleration sensor, the vibration in one direction can only be detected, and it is not easy to determine the position of the measured point, which is not conducive to recording and analyzing the impact of the boom attitude on the boom vibration. Impact

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