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Soil pressure measuring box based on positive flexoelectric effect

A flexoelectric effect and earth pressure technology, applied in the field of geotechnical engineering, can solve the problems of low measurement accuracy of micro pressure, complex structure design, change of vibrating wire, etc., to broaden the scope of use, improve sensitivity, and improve accuracy Effect

Active Publication Date: 2020-12-15
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the use of this earth pressure measurement box: (1) the structural design is complex, requiring components such as electromagnetic coils; (2) the frequency of the vibrating wire will change over time; (3) due to the strain based on the induction plate Principle, the accuracy of micro pressure measurement is low

Method used

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  • Soil pressure measuring box based on positive flexoelectric effect
  • Soil pressure measuring box based on positive flexoelectric effect
  • Soil pressure measuring box based on positive flexoelectric effect

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Embodiment Construction

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like figure 1 and figure 2 As shown, an earth pressure measuring box based on the positive flexoelectric effect includes a box body 1, a sealing ring 2, a box cover 4, a circular sensitive unit 6, an upper surface electrode 5, a lower surface electrode 7, a support rod 8 and Lead 9; the circular sensitive unit 6 is fixed on the upper edge of the box body 1, one end of the support rod 8 is glued and fixed at the center of the box cover 4, and the other end is glued to the center of the circular sensitive unit 6, and the lead 9 is connected to the circular The upper surface electrode 5 and the lower surface electrode 7 of the sensitive unit 6 are led out of the casing 1 from the catheter 10 .

[0030] There is a sealing ring 2 between the box cover 4 and the box body 1, and the sealing ring 2 is bonded to the inner edge of the l...

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Abstract

The invention discloses a soil pressure measuring box based on a positive flexoelectric effect. The soil pressure measuring box comprises a box cover, a supporting rod, a circular sensitive unit and abox body which are arranged from top to bottom, wherein the outer ring of the circular sensitive unit is fixed to the upper edge of the box body, one end of the supporting rod is fixed to the box cover, and the other end of the supporting rod is fixed to the center of the circular sensitive unit; and the circular sensitive unit is made of a flexoelectric material, the upper surface and the lowersurface of the circular sensitive unit are plated with an upper surface electrode and a lower surface electrode respectively, and the upper surface electrode and the lower surface electrode are connected to an external signal processing unit through leads respectively. According to the soil pressure measuring box, the influence of environmental interference factors can be eliminated, the micro pressure measuring accuracy is improved, and the application range of the soil pressure measuring box is widened.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an earth pressure measuring box based on positive flexoelectric effect. Background technique [0002] The stress test in rock and soil mass is one of the important test items in geotechnical engineering, and it is the premise of quantitative mechanical analysis and engineering safety evaluation. field of civil engineering. At present, a sinusoidal earth pressure measuring box is commonly used. The principle is that when the soil stress in the measured structure changes, the earth pressure gauge induction plate senses the change of stress synchronously, and the induction plate will be deformed, and the deformation will be transmitted to the vibrating wire and transformed into Changes in the stress of the vibrating wire, thereby changing the vibration frequency of the vibrating wire. The electromagnetic coil excites the vibrating wire and measures its vibration f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/04G01L5/00
CPCG01L1/04G01L5/00
Inventor 胡涛涛康志斌陈建勋陈利俊罗彦斌赵鹏宇王传武王栋胡雄
Owner CHANGAN UNIV
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