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Piezoelectric type six-dimensional force sensor with adjustable load sharing ratio and test method thereof

A six-dimensional force sensor, electric technology, applied in the measurement of fluid pressure, measuring fluid pressure through electromagnetic components, instruments, etc., can solve the problem that the six-dimensional force sensor cannot adapt to variable-range six-dimensional force measurement, etc., to achieve simple structure and manufacturability Good, good stability

Active Publication Date: 2011-09-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned traditional six-dimensional force sensor that cannot adapt to variable range six-dimensional force measurement, and design a six-dimensional sensor with good technical performance, reliable operation, easy manufacture, installation and maintenance, and convenient productization that can adapt to variable range six-dimensional force measurement. Force-adjustable load-sharing ratio piezoelectric six-dimensional force sensor, and introduce its test method

Method used

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  • Piezoelectric type six-dimensional force sensor with adjustable load sharing ratio and test method thereof
  • Piezoelectric type six-dimensional force sensor with adjustable load sharing ratio and test method thereof
  • Piezoelectric type six-dimensional force sensor with adjustable load sharing ratio and test method thereof

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Effect test

Embodiment 1

[0020]Example 1: The diameter of the measured shaft is 1000mm, the axial force is 1000000N, and the lateral force is 100000N. According to the force range allowed by the force sensor and considering the safety factor, the appropriate load sharing ratio is determined to be 0.5%, and a series of modularization is selected. The load sharing ring 4 and the positioning ring 5 are the largest set of load sharing, and the force sensitive element 2 is installed in the first through hole c of the lower body 1 , select a set of fixtures with an inner diameter of 1000mm and sufficient clamping force, and then install the positioning ring 5, the load sharing ring 4, and the force sensor 2 in sequence, and ensure that the upper surface e of the force sensor is on the surface of the load sharing ring by grinding. The surface k is at the same height, and the upper cover 3, the force sensitive element 2, and the lower body 1 are passed through the first through hole c of the lower body with th...

Embodiment 2

[0021] Example 2: When the measured shaft diameter is 100mm, the axial force is 100N, and the lateral force is 100N, the appropriate load sharing ratio is calculated to be 50%. Because the shaft is under less force, no load sharing ring is needed. 4 load sharing, and in order to improve the sensitivity of the sensor, the installation position of the force sensor 2 is selected as the third through hole c of the lower body 3 , that is, the position closest to the measured shaft 11, and a set of fixtures with an inner diameter of 100 mm are used, and then four force-sensitive elements 2 are installed in the third through hole c of the lower body 3 place, and use the pre-tightening screw 6 to pass the upper cover 3, the force sensitive element 2, and the lower body 1 through the third through hole c of the lower body 3 , the third threaded hole c on the upper cover 3 connection, wherein the pre-tightening force of the pre-tightening screw is 12000N, then the upper cover 3 is rigi...

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Abstract

The invention discloses a piezoelectric type six-dimensional force sensor with an adjustable load sharing ratio and a test method thereof, which belongs to the field of sensors and measurement and control thereof. The invention particularly relates to the measurement of six-dimensional force on a shaft in different measuring ranges. The six-dimensional force sensor comprises an upper cover, four force sensing elements for sealing and leading out conducting wires, a lower body, load sharing rings, positioning rings and four pre-tightening screws. The adopted test method adjusts the ratio of the summation of stresses on the four force sensing elements to the stress on a tested shaft by adjusting the mounting positions of the four force sensing elements and selecting a series of modularized load sharing rings and positioning rings. The piezoelectric type six-dimensional force sensor adjusts the load sharing ratio to achieve the aim that the same sensor measures the six-dimensional force with different measuring ranges on the shaft in a certain shaft diameter range; and the piezoelectric type six-dimensional force sensor has good rigidity, high sensibility, a low cost and easy commercialization, and the test method is simple to operate, is convenient to use and is safe and reliable.

Description

technical field [0001] The invention belongs to the field of sensors and their measurement and control, and in particular relates to the measurement of six-dimensional force on an axis within different measuring ranges. Background technique [0002] Six-dimensional force measurement is a key technology in the field of sensor measurement and control. In engineering, due to the different ranges of force measurement, the selected six-dimensional force sensors are also different. There are many kinds of traditional six-dimensional force sensors, such as four vertical rib structure six-dimensional force sensors, cross structure six-dimensional force sensors, Stewart structure six-dimensional force sensors, cylindrical six-dimensional force sensors, etc. The six-dimensional force on the surface of the measured object has complex structure, large size, low rigidity, and difficult decoupling. After the design is completed, it can only measure the force within a certain range, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L3/00G01L9/00
Inventor 张军房庆华李映君贾振元钱敏
Owner DALIAN UNIV OF TECH
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