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Point-contact pin-type force sensor

A load cell and point contact technology, applied in the direction of measuring force, instruments, measuring devices, etc., can solve the problems of weak carrying capacity of hollow structures, unstable measurement results, uneven load distribution, etc., and achieve strong carrying capacity and product reliability High and repeatable effect

Inactive Publication Date: 2013-10-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

The hollow structure has a weak bearing capacity and is not suitable for the measurement of large engineering structures subject to large loads; and the line / surface contact form can easily lead to uneven load distribution on the sensor during measurement, and changes in the load transfer form, especially for large loads and statically indeterminate structures , which will have adverse effects of unstable measurement results and large measurement errors

Method used

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Embodiment Construction

[0014] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0015] like figure 1 As shown, a point contact pin type force sensor includes a pin body 1 and a pin seat 6 located at one end of the pin body 1. Three drum-shaped bosses 2 are arranged in sequence on the axial direction of the pin body 1, and two adjacent The pin body between the drum-shaped bosses 2 is a sensing section 4, and a wire arrangement groove 3 is arranged on the outer peripheral surface of each drum-shaped boss, and a total of three wire arrangement grooves on each drum-shaped boss are arranged along the axis of the pin body. To be collinear, four resistance strain gauges 7 are evenly arranged on the outer peripheral surface of each sensing section 4, and each resistance strain gauge 7 is connected with a wire 8, and the wire 8 passes through the wire arrangement groove 3 and then passes through the pin seat 6. The lead hole 9 is connected...

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Abstract

A point-contact pin-type force sensor relates to the technology field of sensors of measuring mechanical-structure joint loads. Three drum type bosses are successively arranged on a pin body in an axial direction, the pin body between two adjacent drum type bosses is a sensing part, a lead laying groove is mounted on a peripheral surface of every drum type boss and the whole three lead laying grooves are collinear along the pin-body axial direction. Four resistance strain gages are uniformly disposed on a peripheral surface of every sensing part, every resistance strain gage is connected with a lead; the lead passes by the lead laying groove, penetrates a lead wire hole arranged in a pin base, and is connected with a lead fixed terminal; and the lead fixed terminal is mounted on a peripheral surface of the pin base. The force sensor provided by the invention achieves purposes of good reproducibility of measuring results, high precision, large-load measuring applicability and high reliability.

Description

technical field [0001] The invention relates to the technical field of sensors for measuring loads on joints of mechanical structures. Background technique [0002] Connecting joints are the key parts of engineering structure connection and load transmission. Accurately measuring the bearing size and load direction of joints is of great significance to structural safety check and reliability analysis. Among the existing load cells, the hollow, line / surface contact design is generally adopted. The hollow structure has a weak bearing capacity and is not suitable for the measurement of large engineering structures subject to large loads; and the line / surface contact form can easily lead to uneven load distribution on the sensor during measurement, and changes in the load transfer form, especially for large loads and statically indeterminate structures , which will have adverse effects of unstable measurement results and large measurement errors. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G01L1/22
Inventor 许江波王月韩钰薛彩军蔡辰宁
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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