A method for obtaining fatigue damage spectrum by simulating road transportation of smart meters

Abstract

The invention relates to the field of testing, and specifically discloses a method for obtaining a fatigue damage spectrum through simulation of road transportation of a smart meter. The method includes steps: conducting a stable-state sinusoidal test on the smart meter on a plurality of single-degree-of-freedom linear systems; when the stable state is reached that the vibration acceleration valueof each single-degree-of-freedom linear system is a constant value, respectively obtaining a first vibration fatigue damage spectrum through scanning; when the stable state is reached that a vibration displacement value of each single-degree-of-freedom linear system is a constant value, respectively obtaining a second vibration fatigue damage spectrum through scanning; obtaining an acceleration power spectrum density of a certain frequency through random vibration of the plurality of single-degree-of-freedom linear systems, and obtaining a third vibration fatigue damage spectrum according tothe acceleration power spectrum density; and selecting the maximum vibration fatigue damage spectrum from the first, second and third vibration fatigue damage spectrums. According to the method, the fatigue damage spectrum with the severest test condition is obtained, the severest vibration test can be conducted based on the fatigue damage spectrum, a test result is more accurate, and the time consumed by the test is shorter.

Description

technical field [0001] The invention belongs to the field of test and test, in particular to a method for simulating road transportation of smart meters to obtain fatigue damage spectrum. Background technique [0002] Smart energy meters have many internal components and fine structures, including a large number of chips, crystal oscillators, batteries, inductance and resistance devices, and are very sensitive to vibration. When transported on the road surface, the random vibration due to the unevenness of the road surface will cause the performance parameters of the electronic device to change, thereby moving the working point or causing a decrease in measurement accuracy, affecting the performance of the meter, and even leading to failure. Therefore, for smart meters Road transport test is very necessary. [0003] Road transportation vibration is a kind of broadband, low-frequency random vibration with low amplitude and long duration. The traditional vibration test is to ...

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Problems solved by technology

Although the sports car test of the product can reflect the vibration environment it experienced more realistically and has high accuracy, but it consumes too much time, manpower and material resources

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