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A Miniature Probe with Temperature Compensation Function

A technology of temperature compensation and temperature compensation sheet, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems of measurement error and inability to reflect the real changes of components, etc., and achieve convenient use, simple structure, and elimination of resistance value effect of change

Active Publication Date: 2019-12-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the measurement process, when the working environment temperature changes, the measured strain cannot reflect the real change of the component
Temperature-induced resistance changes co-exist with strain-induced resistance changes, leading to measurement errors

Method used

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  • A Miniature Probe with Temperature Compensation Function
  • A Miniature Probe with Temperature Compensation Function
  • A Miniature Probe with Temperature Compensation Function

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] A miniature probe with temperature compensation, see figure 1 , including: extension part 1, first compensation block 2.1, second compensation block 2.2, first temperature compensation sheet 3.1, second temperature compensation sheet 3.2, extension inner cylinder 4, connection part 5, pressure bar connector 6, circuit board 7. Signal transmission cable 8, side wall friction sensor 9, side wall friction sleeve 10, inclinometer 11, first strain gauge 12.1, second strain gauge 12.2, third compensation block 12.3, fourth compensation block 12.4, Cone point resistance sensor 13, socket inner cylinder 14, connecting inner cylinder 14.1, pressure sensor 15, pore pressure filter ring 16, conical head 17.

[0024] A full-bridge temperature compensation circuit added to a miniature probe with temperature compensation function, see fig...

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Abstract

The invention relates to a miniature probe with a temperature compensation function, and belongs to a testing tool for geotechnical engineering underground site prospecting of the field of civil engineering. The probe comprises an extension part, a connecting part, a side wall friction sleeve, a pore pressure filter ring and a full-bridge temperature compensation circuit; and the full-bridge temperature compensation circuit comprises four strain gauges, wherein the two strain gauges are arranged on an extending inner cylinder in the extension part and are correspondingly a first temperature compensation sheet and a second temperature compensation sheet, and the other two strain gauges are arranged in a measuring area, that is a sleeving connection inner cylinder in the side wall friction sleeve, of the probe and are correspondingly a first strain gauge and a second strain gage. According to the miniature probe with the temperature compensation function, the structure is simple, the full-bridge temperature compensation circuit is configured, resolution and accuracy are high, resistance change caused by temperature change can be eliminated, more credible and reasonable testing results are obtained, and the miniature probe with the temperature compensation function provides the powerful testing tool for geotechnical engineering prospecting of the civil engineering field.

Description

technical field [0001] The invention relates to a micro-probe with temperature compensation function, which belongs to a test tool for geotechnical engineering underground site investigation in the field of civil engineering. Background technique [0002] With the rapid development of my country's economic construction, large-scale infrastructure construction projects such as urbanization construction, highways, bridges and tunnels, and underground space development continue to develop, and the scale of the project continues to expand. However, unreliable or unsafe design parameters, structural cracks during construction, excessive settlement and deformation of buildings, and even instability and damage often occur in engineering construction, which brings great difficulties to engineering design and safety control. Due to the complex and changeable natural conditions, rock and soil have very complex engineering mechanical properties, determining the parameters of geotechnic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/00
CPCE02D1/00
Inventor 蔡国军刘晓燕
Owner SOUTHEAST UNIV