CN204269262U - Multidirectional concrete dynamic stress monitoring sensor - Google Patents

Abstract

A multidirectional concrete dynamic stress monitoring sensor is composed of a support body, a sensor sheet and a cover body; the support body is a solid spherical structure made of concrete; the cover body is a hollow spherical structure made of concrete, and its inner cavity is spherical; The sensing sheet is a hemispherical sheet-like structure, two sensing sheets are spliced to form a hollow spherical structure, and its cavity forms a filling cavity; the hollow spherical structure is set in the covering body, and the support body is set in the filling cavity; the sensing There is a gap on the edge of the sensor chip. When the two sensor chips are spliced together, the gap forms a through hole, and the covering body is provided with a wire hole; the inner and outer walls of the sensor chip are respectively connected with an output wire; the output wire passes through the through hole. And lead through the hole; the sensing piece is made of piezoelectric ceramic material. The beneficial technical effect of the utility model is: omnidirectional sensing of the stress situation in the monitoring area can be carried out, so that more stress data can be obtained with a smaller number of sensors, and the comprehensiveness and accuracy of stress monitoring can be improved.

Description

Multidirectional Concrete Dynamic Stress Monitoring Sensor

technical field

The utility model relates to a stress detection technology in a concrete structure, in particular to a multi-directional concrete dynamic stress monitoring sensor.

Background technique

The internal stress state of the concrete structure under external load is closely related to the stability of the structure, so the acquisition of the internal stress of the concrete structure is of great significance for the analysis of the structural stability; in the prior art, when performing stress tests on concrete components, generally The internal stress of the component is obtained by embedding a piezoelectric ceramic sensor; the existing problem is that the sensing part of the existing piezoelectric ceramic sensor is generally a flat sheet structure, which can only sense the stress state in a single direction, but , under the action of external load, the internal stress of concrete members has the characteristics of multi-directionality, and the stress data obtained by the existing piezoelectric ceramic sensor is obviously difficult to accurately reflect the actual stress inside the member, and if the concrete member If a large number of piezoelectric ceramic sensors are installed inside, the integrity of the concrete components will be destroyed to a large extent, and the real force of the concrete components cannot be accurately reflected.

Utility model content

Aiming at the problems in the background technology, the utility model proposes a multi-directional concrete dynamic stress monitoring sensor, the structure of which is: the multi-directional concrete dynamic stress monitoring sensor is composed of a support body, two sensing sheets and a covering body; The support body is a solid spherical structure made of concrete; the covering body is a hollow spherical structure made of concrete, and the inner cavity of the covering body is also spherical; the sensing piece is a hemispherical sheet structure, and two sensing pieces The sheets are spliced together to form a hollow spherical structure, and the inner cavity of the hollow spherical structure forms a filling cavity; the hollow spherical structure is arranged in the inner cavity of the covering body, and the support is arranged in the filling cavity to support Body, sensing sheet and covering body are in close contact; there is a gap at the edge of the sensing sheet, when two sensing sheets are spliced together, the two gaps form a through hole, and the covering body is provided with A wire hole corresponding to the through hole; an output wire is connected to the inner wall and the outer wall of the sensor piece; the output wire is drawn out through the through hole and the wire hole; the sensor piece is made of piezoelectric ceramic material.

The principle of the utility model is: the structure spliced by two sensing sheets, because of its spherical shape, can sense the stress in all directions in the monitoring area in all directions, so that each monitoring area can obtain More stress data can be obtained to improve the comprehensiveness and accuracy of stress monitoring; among them, the support body has two functions. On the other side, a corresponding structure needs to be set to squeeze the sensor sheet together with the external stress to form a piezoelectric output. Second, the support body is in full contact with the inner wall of the sensor sheet, which can avoid the sensor sheet Breakage and damage due to excessive local stress; in addition, the covering body is mainly used to protect the sensor: similar to the support body, the inner wall of the covering body is also in close contact with the outer surface of the sensor sheet in a full contact manner, and the external stress needs to pass through the covering body In the transfer process, the covering body has a certain reduction effect on the external stress, so as to avoid large stress directly acting on the sensor sheet.

Based on conventional electrical common sense, in order to ensure good electrical output of the sensor, the utility model also proposes the following improvement scheme on the basis of the foregoing scheme: the surface of the sensor sheet is covered with an insulating adhesive layer.

Preferably, the insulating adhesive layer covers the output wires inside.

In order to improve the stability of the sensor, the utility model also proposes the following preferred solution: the connection between the output wire and the sensing sheet is set adjacent to the notch on the sensing sheet. After the connection is arranged adjacent to the notch, the length of the output wire can be effectively shortened, and the stability of the sensor can be improved.

The beneficial technical effect of the utility model is: omnidirectional sensing of the stress situation in the monitoring area can be carried out, so that more stress data can be obtained with a smaller number of sensors, and the comprehensiveness and accuracy of stress monitoring can be improved.

Description of drawings

Fig. 1, the structural section schematic diagram of the utility model;

The names corresponding to each mark in the figure are: support body 1, output wire 1-1, sensor sheet 2, insulating adhesive layer 2-1, covering body 3, and through hole 4.

Detailed ways

A multi-directional concrete dynamic stress monitoring sensor, its structure is: the multi-directional concrete dynamic stress monitoring sensor is composed of a support body 1, two sensing sheets 2 and a covering body 3; the support body 1 is a solid concrete material Spherical structure; the covering body 3 is a hollow spherical structure made of concrete, and the inner cavity of the covering body 3 is also spherical; the sensing sheet 1 is a hemispherical sheet-like structure, and two sensing sheets 1 are spliced together form a hollow spherical structure together, and the inner cavity of the hollow spherical structure forms a filling cavity; the hollow spherical structure is arranged in the inner cavity of the covering body 3, the support body 1 is arranged in the filling cavity, and the support body 1. The sensing sheet 2 and the covering body 3 are in close contact; the edge of the sensing sheet 1 is provided with a gap, and when the two sensing sheets 1 are spliced together, the two gaps form a through hole 4, the said The covering body 3 is provided with a wire hole corresponding to the through hole 4; the inner wall and the outer wall of the sensor sheet 1 are respectively connected with an output wire 1-1; the output wire 1-1 is drawn out through the through hole 4 and the wire hole ; The sensing sheet 2 is made of piezoelectric ceramic material.

Further, the surface of the sensing sheet 2 is covered with an insulating glue layer 2-1.

Further, the insulating glue layer 2-1 covers the output wire 1-1 inside.

Further, the connection between the output wire 1 - 1 and the sensing sheet 1 is set adjacent to the notch on the sensing sheet 1 .

In order to facilitate the implementation of those skilled in the art, the utility model also discloses the specific manufacturing method of the aforementioned sensor:

1) Weld and fix the output wire 1-1 and the sensor piece 2;

2) Apply an insulating adhesive layer 2-1 on the surface of the sensing piece 2;

3) Install the sensor sheet 2 on the surface of the support body 1;

4) Coat concrete on the surface of the sensing piece 2, then scrape the concrete surface into a spherical shape, and form the covering body 3 after the concrete is dry.

In specific use, the multi-directional concrete dynamic stress monitoring sensor is directly poured inside the concrete member.

Claims (4)

1. A multi-directional concrete dynamic stress monitoring sensor, characterized in that: the multi-directional concrete dynamic stress monitoring sensor is composed of a support body (1), two sensing sheets (2) and a covering body (3); The support body (1) is a solid spherical structure made of concrete; the covering body (3) is a hollow spherical structure made of concrete, and the inner cavity of the covering body (3) is also spherical; the sensing piece (1) is Hemispherical sheet-like structure, two sensing pieces (1) are spliced together to form a hollow spherical structure, and the inner cavity of the hollow spherical structure forms a filling cavity; the hollow spherical structure is arranged on the covering body ( 3), the support body (1) is arranged in the filling cavity, and the support body (1), the sensor sheet (2) and the covering body (3) are in close contact; the sensor sheet (1) ) is provided with a gap at the edge, when the two sensing pieces (1) are spliced together, the two gaps form a through hole (4), and the cover (3) is provided with a corresponding hole (4) The wire hole; the inner wall and the outer wall of the sensor sheet (1) are respectively connected with an output wire (1-1); the output wire (1-1) is drawn out through the through hole (4) and the wire hole; The sensing sheet (2) is made of piezoelectric ceramic material. 2. The multi-directional concrete dynamic stress monitoring sensor according to claim 1, characterized in that: the surface of the sensor sheet (2) is covered with an insulating adhesive layer (2-1). 3. The multi-directional concrete dynamic stress monitoring sensor according to claim 2, characterized in that: the insulating adhesive layer (2-1) covers the output wire (1-1). 4. The multi-directional concrete dynamic stress monitoring sensor according to claim 1, characterized in that: the connection between the output wire (1-1) and the sensing sheet (1) and the gap on the sensing sheet (1) Location proximity settings.