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Vibration table negative feedback failure detection system for device redundancy particle collision detecting device and detection method thereof

A technology of collision detection and detection system, which is applied in the direction of measuring device, vibration test, machine/structural component test, etc. It can solve the problems of equipment or staff damage, vibration falling, vibration flying, etc., and achieve the elimination of vibration table table bottom collision Effect

Active Publication Date: 2019-07-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that excessive vibration acceleration will be generated when the negative feedback of the vibrating table fails in the existing particle collision detection device for redundant objects, which may shake off or fly the tested part on the vibrating table, causing the surrounding equipment or work to be damaged. damage to personnel

Method used

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  • Vibration table negative feedback failure detection system for device redundancy particle collision detecting device and detection method thereof
  • Vibration table negative feedback failure detection system for device redundancy particle collision detecting device and detection method thereof
  • Vibration table negative feedback failure detection system for device redundancy particle collision detecting device and detection method thereof

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specific Embodiment approach 1

[0022] Specific implementation mode one: refer to figure 1 , figure 2 Specifically explain this embodiment, the vibrating table negative feedback failure detection system of the component excess particle collision detection device described in this embodiment, the system includes a main controller 2 and a drive signal detection comparison circuit 1,

[0023] The main controller 2 includes a load estimation module 2-2, an acceleration signal comparison module 2-1, a protection module 2-3 and a threshold calculation module 2-4,

[0024] The threshold calculation module 2-4 is used to obtain the full-load drive signal threshold according to the vibration frequency set by the vibration table at low frequencies,

[0025] At high frequency, the acceleration signal threshold is obtained according to the vibration acceleration set by the vibration table,

[0026] At intermediate frequency, according to the vibration frequency and vibration acceleration set by the vibration table, t...

specific Embodiment approach 2

[0043] Specific embodiment 2: This embodiment is to further explain the vibration table negative feedback failure detection system of the component excess particle collision detection device described in the specific embodiment 1. In this embodiment, it is also used to preset the failure threshold of the acceleration signal , according to the preset acceleration signal failure threshold, the half-load acceleration accumulation sum threshold and the accumulated value of the acceleration signal collected after the shaking table vibrates, the specific process of judging whether the shaking table is in a full-load state or a half-load state at an intermediate frequency is as follows:

[0044] If the accumulated value of the acceleration signal collected after vibration is higher than the cumulative sum threshold of the half-load acceleration signal or lower than the low threshold of the acceleration signal, it means that the vibration table is currently in a half-load state. If the ...

specific Embodiment approach 3

[0045] Specific embodiment three: this embodiment is to further explain the vibrating table negative feedback failure detection system of the device excess particle collision detection device described in the second specific embodiment. In this embodiment, according to any of the three driving thresholds A driving signal threshold and the driving signal of the driver detected by the peak hold circuit, and the specific process of controlling the level signal output is as follows:

[0046] Compare any of the driving signal thresholds among the three driving thresholds with the driving signal detected by the peak hold circuit. If the driving signal is higher than any of the three frequency thresholds, it means that the negative feedback of the vibrating table is invalid, and a high voltage is output. Level, if the driving signal is lower than any of the three frequency thresholds, it means that the negative feedback of the vibrating table is valid, and the output is low.

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Abstract

The invention provides a vibration table negative feedback failure detection system of a device redundancy particle collision detecting device and a detection method thereof, which relate to the technical field of device redundancy detection. The problem that the existing device redundancy particle collision detecting device generates excessive vibration acceleration when the negative feedback ofa vibration table fails, which may vibrate a test piece on the vibration table to enable the test piece to fall down or fly away and causes surrounding equipment or work personnel to be damaged. First, a threshold required for failure detection is selected according to different vibration frequencies of the vibration table. Then when the vibration table is running, whether the negative feedback ofthe vibration table of the device fails is determined according to the threshold. If the negative feedback fails, the driving signal of a driving device is pulled down to enable the vibration table to stop vibrating. The system is used to eliminate the phenomenon that the vibrating table hits the bottom after the negative feedback of the vibration table fails.

Description

technical field [0001] The invention relates to a collision detection device for component redundant particles. The invention belongs to the technical field of device redundant object detection. Background technique [0002] Aerospace relays are widely used in launch vehicles, artificial satellites, missiles, space shuttles, spacecraft and their supporting ground measurement and control equipment, etc. The working environment is harsh, and its reliability directly affects the reliability of these equipment. In the production process of aerospace relays, some material debris may be sealed inside the relay, and these excess materials may randomly swim in the sealed relay, which may cause the relay to fail or malfunction, causing various accidents. Therefore, the aerospace relay redundant detection Technology has important practical value. At present, Particle Impact Noise Detection (PIND) technology is commonly used to detect the excess of aerospace relays. According to the ...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 翟国富王国涛燕会臻郜雷震
Owner HARBIN INST OF TECH