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A comprehensive test method for force and acceleration

A technology of comprehensive testing and testing methods, which is applied in the field of force and acceleration comprehensive testing and force testing, which can solve problems such as rigidity and singleness, and achieve the effects of fast response, strong environmental adaptability, and convenient testing

Inactive Publication Date: 2017-04-05
NANJING CHANGYUAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to propose a comprehensive test method for force and acceleration in order to overcome the relatively inflexible and single defects of existing test methods

Method used

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  • A comprehensive test method for force and acceleration
  • A comprehensive test method for force and acceleration
  • A comprehensive test method for force and acceleration

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0056] Embodiment 1: Test the force of an object. After removing the detachable mass block 1, after applying any horizontal force on the upper end of the light elastic rod 2 by hand, the size and direction of the arbitrary horizontal force can be detected.

[0057] The voltage signals collected by the first, second and third groups of resistance strain gauges at a certain moment during the test are V1=31mv, V2=7.3mv and V3=-29.5mv respectively. The dynamic data acquisition and analysis system eliminates the smallest second group of resistance and strain signals by comparison, takes the first and third groups for analysis, and obtains by calculation

[0058]

[0059]

[0060] When the signals of the first group of resistance strain gauges and the third group of resistance strain gauges are relatively large, the equation (1) and equation (3) are used to calculate

[0061]

[0062]

[0063]

[0064] To sum up, the magnitude of any horizontal force exerted on the l...

specific Embodiment approach 2

[0065] Specific implementation mode two: testing of vehicle braking performance and safety performance. Arrange the test device at the occupant's position to monitor the vehicle acceleration during emergency braking and the changes in the inertia force experienced by the occupant over time;

[0066] During the test, the y-axis of the test device is parallel to the longitudinal axis of the vehicle, the input voltage IV=2000mv, the strain gauge gain SS=1000, the strain gauge sensitivity coefficient SC=2.09, and the strain correction coefficient CC=1.0151.

[0067] The voltage signals collected by the first, second and third groups of resistance strain gauges at a certain moment during the test are V1=21.5mv, V2=46mv and V3=19mv respectively. The dynamic data acquisition and analysis system eliminates the smallest third group of resistance and strain signals by comparison, and takes the first and second groups for analysis. Through calculation, it can be obtained

[0068]

[...

specific Embodiment approach 3

[0076] Specific implementation mode three: real-time monitoring of the vehicle's own inertial force. The test device is arranged in the vehicle to monitor the inertial force of the vehicle when the vehicle is turning, and give an alarm when the vehicle speed exceeds the limit;

[0077] The vehicle passes the ramp. During the test, the input voltage of the test device IV=2000mv, the strain gauge gain SS=1000, the strain gauge sensitivity coefficient SC=2.09, and the strain correction coefficient CC=1.0151.

[0078] The voltage signals collected by the first, second and third groups of resistance strain gauges at a certain moment during the test are V1=31mv, V2=7.3mv and V3=-29.5mv respectively. The dynamic data acquisition and analysis system eliminates the smallest second group of resistance and strain signals through comparison, and takes the first and third groups for analysis. Through calculation, it can be obtained

[0079]

[0080]

[0081] When the signals of the ...

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Abstract

The invention discloses a comprehensive test method for acting force and acceleration; a test device for implementing the method is composed of a detachable mass block, a soft elastic rod, three sets of resistance strain gauges, a cable, a dynamic data collection and analysis system and a fixed pedestal; the test method includes the steps that: the three sets of resistance strain gauges are adopted for test, and during a test process, the dynamic data collection and analysis system compares three sets of strain data collected at each time, and takes two pieces of data which are relatively large for analyzing, thus achieving the real-time and accurate monitoring of the acting force, inertia force and acceleration, and test of three-dimensional inertia force and acceleration of a moving object can be achieved by a method of distributing two devices in a vertically staggered manner. The test method provided by the invention reduces influence of signal interference on test precision, thus being high in test precision.

Description

technical field [0001] The invention belongs to the field of engineering testing, and relates to a force testing method, more specifically, to a force and acceleration comprehensive testing method. Background technique [0002] At present, there are many force testing methods and devices based on strain technology, whether they are two-dimensional or three-dimensional, most of them are combined orthogonally by multiple unidirectional acceleration sensors, that is to say, all directions measured are A quality block needs to be arranged, and the structure is relatively complicated. In addition, there is also an integrated acceleration sensor that only uses one mass block. The method is to test the acceleration in three orthogonal directions through one mass block, but its one-plane acceleration test member will produce acceleration in the orthogonal direction. greater disturbance. Existing acceleration sensors based on strain technology either arrange special mass blocks in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
Inventor 沈超明徐斌刘建华王志东
Owner NANJING CHANGYUAN INFORMATION TECH CO LTD