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Embedded stress strain sensor

A stress-strain, embedded technology, used in fluid pressure measurement, instruments, scientific instruments, etc. using acoustic methods, can solve the problems of troublesome operation, troublesome sensor arrangement, large number of sensors, etc., to achieve convenient stress detection, reduce Quantity and effect of labor installation cost

Inactive Publication Date: 2021-10-19
CHINA COAL TECH ENG GRP CHONGQING RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing stress-strain sensors are ordinary sensors. Generally, the sensors are installed at specific positions when stress detection is required. Such sensors can only be installed one by one artificially. For some special building structures, One is that it is difficult to arrange the sensor at the corresponding position, and the other is that because of the precise detection of stress, there will be multiple detection positions on only one detection object. Position detection (for example, for stress detection in an area where the top surface is a horizontal plane, even if it is the same detection point, it is usually necessary to install sensors at different depths, and the operation is very troublesome)
This kind of setting not only consumes a large number of sensors and high cost, but also it is very troublesome to arrange the operation of sensors.

Method used

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Experimental program
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Embodiment 1

[0032] It should be noted that, for ease of understanding, the usage scenario of this embodiment is a usage scenario that requires long-term high-frequency stress and strain detection, that is, a sensor needs to be installed in the detection area for long-term continuous detection.

[0033] Such as figure 1 , figure 2 As shown, the embedded stress and strain sensor includes a power module, a casing 1 and a detection part arranged in the casing 1 .

[0034] The detection part is used for stress detection; specifically, the detection part includes an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter is used for emitting ultrasonic waves, and the ultrasonic receiver is used for receiving reflected ultrasonic signals.

[0035] The front end of the casing 1 is fixed with an excavation part 2 . The excavating part 2 can select a screw excavator of a corresponding size according to the size of the casing 1 .

[0036] The end of the shell 1 is fixed wit...

Embodiment 2

[0047] The difference from the first embodiment is that this embodiment also includes a processing unit, and the processing unit is integrated in the host computer. The upper computer communicates with the lower computer, and the lower computer is electrically connected with the embedded stress sensor. The management personnel can preset the detection program in the upper computer, and the upper computer can automatically control the work of each mechanism in this application through the lower computer. At the same time, the lower computer can send the detection data of the detection part to the upper computer.

[0048] The processing unit is used for receiving detection data and performing stress and strain analysis. When the thermoelectric power generation mechanism is working normally, the processing unit performs temperature compensation processing on the received detection data based on the previous time and the preset algorithm, and then performs stress analysis.

[00...

Embodiment 3

[0051] In those areas where the detection position is relatively shallow, the slag generated during the excavation process will fly out of the hole by itself, and even if some slag remains, it will not affect the subsequent excavation. However, in some areas where the detection position is relatively deep, there may be a lot of soil residue accumulation. At this time, if the soil residue cannot be discharged in time, the follow-up excavation work of the excavation unit 2 will be affected.

[0052] Therefore, different from Embodiment 1, the present embodiment also includes a microcontroller and a soil suction device. The soil suction device includes a soil suction pipeline, a negative pressure device and a soil loading box, and the negative pressure device and the soil suction pipe are connected with the soil loading box respectively. Connected, the soil-filling box is fixed on the fixed frame 4; the soil-absorbing pipeline is an elastic telescopic tube, and the free end of the...

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Abstract

The invention belongs to the technical field of stress detection, and particularly relates to an embedded stress strain sensor which comprises a power supply module, a shell and a detection part arranged in the shell. The detection part is used for stress detection; a digging part is fixedly arranged at the front end of the shell; an electric telescopic rod is fixedly arranged at the tail end of the shell, the top end of the electric telescopic rod is fixed to the shell, and a fixing frame is fixedly arranged at the bottom end of the electric telescopic rod; the digging part, an ultrasonic transmitter, an ultrasonic motor and the electric telescopic rod are electrically connected with the power supply module. According to the invention, stress detection can be carried out conveniently.

Description

technical field [0001] The invention belongs to the technical field of stress detection, in particular to an embedded stress and strain sensor. Background technique [0002] In order to ensure the safety of the tunnel, it is necessary to conduct stress-strain analysis on the soil on the tunnel, and the stress-strain analysis is a more complicated problem. To conduct an accurate analysis of the stress, the stress-strain sensor is first required to be able to return accurate detection data. [0003] Existing stress-strain sensors are ordinary sensors. Generally, the sensors are installed at specific positions when stress detection is required. Such sensors can only be installed one by one artificially. For some special building structures, One is that it is difficult to arrange the sensor at the corresponding position, and the other is that because of the precise detection of stress, there will be multiple detection positions on only one detection object. Detection at the pos...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01L11/06G01B17/04G01R31/387
CPCG01N3/08G01L11/06G01B17/04G01R31/387G01N2203/0075G01N2203/0658
Inventor 覃海明胡运兵康厚清肖勇张磊
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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