A space strain measurement device and method based on three-axis inclination positioning

A three-axis inclination and strain measurement technology, applied in the measurement device, electromagnetic measurement device, electric/magnetic solid deformation measurement and other directions, can solve the problem that the strain gauge is difficult to accurately measure the size and direction of the concrete main strain, and simplify the installation steps. , Simple steps, high precision effect

Active Publication Date: 2018-02-27
ZHEJIANG SCI-TECH UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention mainly solves the problem that the strain gauge is difficult to accurately measure the magnitude and direction of the principal strain in bulk materials such as concrete and foundation soil under field conditions where the principal strain direction is unknown or the strain sensor is difficult to be accurately fixed in the prior art. Spatial strain measurement device and method based on three-axis inclination positioning to achieve high-precision measurement even when the principal strain direction is unknown or the axis of the strain measurement device cannot be positioned accurately

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  • A space strain measurement device and method based on three-axis inclination positioning
  • A space strain measurement device and method based on three-axis inclination positioning

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Embodiment 1

[0033] Embodiment 1: as figure 1 A space strain measuring device based on three-axis inclination positioning shown includes a base, a space strain sensor group and a three-axis inclination sensor 11, and the space strain sensor group and the three-axis inclination sensor 11 are fixedly installed on the base, and the space The strain sensor group includes six strain sensors, the central axis of the first strain sensor 1, the central axis of the second strain sensor 2 and the central axis of the third strain sensor 3 intersect at one point in a non-coplanar manner; the fourth strain sensor 4 The central axis of the first strain sensor 1 is on the plane formed by the central axis of the second strain sensor 2, and the central axis of the first strain sensor 1 and the central axis of the second strain sensor 2 are respectively connected with the fourth strain sensor The central axis of 4 intersects at two different points; the central axis of the fifth strain sensor 5 is on the pl...

Embodiment 2

[0054] Example 2: figure 2 The idea of ​​using embedded vibrating wire strain gauges to make a space strain measurement device with three-axis inclination positioning function is demonstrated. In order to meet the fixing requirements of the strain gauge and the three-axis inclination sensor, a figure 2 The metal base 27 is formed by drilling and cutting a cylinder with a diameter of 5 cm to 8 cm and a thickness of about 4 cm. In this project, six BGK4210 embedded vibrating wire strain gauges from BGEOKON Company are selected. Since this type of strain gauge has its own end fixing holes, it can be easily fixed on the metal base 27 through the support rod 28. The first The strain gauge 21, the second strain gauge 22 and the third strain gauge 23 are respectively installed on the rectangular coordinate axes x'y'z' corresponding to the local coordinate system, while the fourth strain gauge 24, the fifth strain gauge 25 and the sixth strain gauge Three gauges 26 are installed o...

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Abstract

The invention discloses a space strain measurement device and method based on three-axis inclination positioning, the device includes a base, a space strain sensor group and a three-axis inclination sensor, and the space strain sensor group and the three-axis inclination sensor are fixedly installed on On the base, the spatial strain sensor group includes six strain sensors, and the strain sensors are arranged in a local coordinate system to form a spatial strain sensor group that can measure positive strain in three directions and shear strain in three directions, and the three-axis inclination sensor is fixed on The spatial strain sensor group constitutes a whole that rotates and deforms together. During measurement, the rotation matrix from the local coordinate system to the global coordinate system is calculated first, and then the strain components in the local coordinate system are converted to the global coordinate system. This scheme is suitable for strain measurement in construction and other aspects.

Description

technical field [0001] The invention relates to three-dimensional space strain measurement of solid materials, in particular to a space strain measurement device and method based on three-axis inclination angle positioning. Background technique [0002] Many projects need to measure the principal strain when the direction of the principal strain is unknown. In laboratory measurement, this purpose can generally be achieved by accurately arranging multiple strain sensors on the same measuring point. However, in the field measurement, the installation of the strain sensor is often subject to the inconvenience of the installation position (such as overhead welding, upward sticking), construction load disturbance (such as the position of the strain gauge welded on the steel bar is easy to deflect with the direction of the steel bar), external force impact (such as Concrete soil vibration) and other unfavorable factors make it difficult to accurately locate the installation axis o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16G01B11/16G01B17/04
Inventor 杨予俞峰
Owner ZHEJIANG SCI-TECH UNIV
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