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Door-opening/closing vibration detection method

A technology for vibration detection and door opening and closing. It is used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc. It can solve problems such as false detections or increased missed detections, and achieve improved accuracy, good versatility, and reduced power consumption. Effect

Active Publication Date: 2017-03-15
GUANGZHOU JIESHENG INFORMATION TECH
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AI Technical Summary

Problems solved by technology

The traditional method based on threshold vibration is difficult to be universal. Different thresholds need to be adjusted for different devices, and the detection threshold cannot be adaptively adjusted during operation. When the status of the device changes, the probability of false detection or missed detection will decrease greatly increased

Method used

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  • Door-opening/closing vibration detection method

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0034] For any object, its instantaneous acceleration value a(t) can be decomposed into the x, y, z3 axis acceleration values ​​of a in the Cartesian coordinate system with the center of gravity of the object as the origin x [t],a y [t],a z [t] where t is an instant time point. The 3D acceleration sensor continuously collects and captures the acceleration value of the device. When the data acquisition work is carried out at M Hz, the 3-axis acceleration values ​​of the collected discrete sequences are respectively a x [n],a y [n],a z [n], where n is the discrete time point of data collection. Under normal conditions, the equipment works at the inherent vibration frequency; when the door o...

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Abstract

The invention discloses a door-opening / closing vibration detection method. The door-opening / closing vibration detection method includes the steps: the step A10 according to the discrete time point, acquiring the triaxial accelerated speed of a Cartesian coordinate system for target equipment successively, and obtaining the accelerated speed data; the step A20 applying an adaptive vibration threshold adjusting method to the accelerated speed data, and detecting the additional vibration generated from door opening / closing of equipment, and then entering the step A30, or finishing the detection; and the step A30, performing analysis of the natural vibration frequency of the target equipment and the vibration frequency of the additional vibration on the accelerated speed data, using an adaptive sampling frequency tracking method to determine the sampling frequency being adapted to the parameters of the target equipment, and applying the sampling frequency to accelerated speed sampling in the step A10. By means of adaptive threshold detection, the door-opening / closing vibration detection method can effectively improve the universality of the system and can change the threshold to adapt to the equipment in real time during the operating process.

Description

technical field [0001] The invention relates to the field of vibration detection, in particular to a vibration detection method for opening and closing doors. Background technique [0002] In the existing technology of detection switch, the traditional way of opening and closing the door using magnetic or photoelectric sensors needs to be installed or even modified on the door, which will inevitably cause the equipment to be unsightly. While the general threshold vibration based on the acceleration sensor can avoid being installed on the door (installed inside the box). The traditional method based on threshold vibration is difficult to be universal. Different thresholds need to be adjusted for different devices, and the detection threshold cannot be adaptively adjusted during operation. When the status of the device changes, the probability of false detection or missed detection will decrease greatly increased. Contents of the invention [0003] The purpose of the prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 刘琰黄灼黄锡雄黄明
Owner GUANGZHOU JIESHENG INFORMATION TECH
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