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An Earth Pressure Measuring Box Based on Positive Flexoelectric Effect

A flexoelectric effect and earth pressure technology, applied in the field of geotechnical engineering, can solve problems such as low measurement accuracy of micro pressure, complex structure design, and changes in vibrating wires, so as to broaden the scope of use, improve sensitivity, and improve accuracy Effect

Active Publication Date: 2022-03-25
CHANGAN UNIV
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  • Summary
  • 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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  • An Earth Pressure Measuring Box Based on Positive Flexoelectric Effect
  • An Earth Pressure Measuring Box Based on Positive Flexoelectric Effect
  • An Earth Pressure Measuring Box Based on Positive Flexoelectric Effect

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Embodiment Construction

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

[0029] Such as figure 1 and figure 2 As shown, an earth pressure measurement 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 pole 8 and Lead wire 9; the circular sensitive unit 6 is fixed on the upper edge of the box body 1, one end of the pole 8 is bonded and fixed at the center of the box cover 4, and the other end is bonded at the center of the circular sensitive unit 6, and the lead wires 9 are respectively connected to the circular The upper surface electrode 5 and the lower surface electrode 7 of the sensitive unit 6 are drawn out of the box body 1 from the conduit 10 .

[0030] A sealing ring 2 is provided between the lid 4 and the box body 1, and the sealing ring 2 is bonded on the...

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Abstract

The invention discloses an earth pressure measurement box based on the positive flexoelectric effect, which comprises a box cover, a support rod, a circular sensitive unit and a box body arranged from top to bottom, and the outer ring of the circular sensitive unit is fixed on the box body One end of the pole is fixed on the box cover, and the other end is fixed at the center of the circular sensitive unit; the circular sensitive unit is made of flexoelectric material, and its upper and lower surfaces are plated with upper surface electrodes and lower surface electrodes respectively. , the upper surface electrode and the lower surface electrode are respectively connected to an external signal processing unit through lead wires; the earth pressure measurement box of the present invention can eliminate the influence of environmental interference factors, improve the accuracy of micro pressure measurement, and broaden the scope of the earth pressure measurement box range of use.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an earth pressure measurement box based on the positive flexoelectric effect. Background technique [0002] The stress test in rock and soil is one of the important test items in geotechnical engineering. It is the premise of quantitative mechanical analysis and engineering safety evaluation. field of soil engineering. At present, the sinusoidal earth pressure measurement box is commonly used. The principle is that when the soil stress in the measured structure changes, the sensing plate of the earth pressure gauge will feel the change of stress synchronously, and the sensing plate will be deformed, and the deformation will be transferred 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 vibra...

Claims

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Application Information

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Patent Type & Authority Patents(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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