Stress sensor for high-strength anchor cable

Abstract

The utility model discloses a stress sensor for a high-strength anchor cable, and belongs to the technical field of anchor cable sensors. A stress sensor for a high-strength anchor cable comprises a sensor shell, a data interface is arranged on the outer surface of the sensor shell, variable sleeves are arranged at the two ends of the sensor shell, sealing lock blocks are arranged on the inner sides of the variable sleeves, the sealing lock blocks are distributed in an annular mode, and the data interface is arranged on the outer surface of the sensor shell. And a power supply assembly is arranged in the sensor shell and is electrically connected with the data interface. In order to solve the problems that an existing vibrating wire type sensor structure detects an anchor cable through the deformation quantity of a string needle, but the vibrating wire type sensor cannot accurately measure the stress of the anchor cable when the stress of the anchor cable occurs in an individual area, the sensor structure can comprehensively cover the anchor cable through three groups of different detection modes. And the three groups of detection data are mutually proved, so that the measurement precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of anchor cable sensor technology, specifically a stress sensor for high-strength anchor cables. Background Technology

[0002] Anchor cable force gauges are vibrating wire sensors used for long-term monitoring of the anchorage status of prestressed hydraulic structures, other concrete structures, rock slopes, bridges, etc., and can simultaneously measure the temperature at the embedment point. The real-time measured values ​​of each strain sensor of the force gauge are read by the vibrating wire frequency reader, and the pressure applied by the anchor cable can be calculated using the instrument's characteristic parameters.

[0003] Existing vibrating wire sensor structures detect anchor cables by measuring the deformation of the string needle, but vibrating wire sensors cannot accurately measure anchor cable stress when it occurs in specific areas. Utility Model Content

[0004] The purpose of this invention is to provide a stress sensor for high-strength anchor cables. The sensor structure can provide comprehensive coverage of the anchor cable through three different detection methods, and the three sets of detection data corroborate each other, thereby ensuring measurement accuracy and solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stress sensor for high-strength anchor cables, comprising a sensor housing, a data interface provided on the outer surface of the sensor housing, and variable sleeves provided at both ends of the sensor housing, wherein sealing blocks are provided on the inner side of the variable sleeves in a ring-shaped distribution, and a power supply assembly is provided inside the sensor housing, which is electrically connected to the data interface.

[0006] Preferably, the inner side of the power supply assembly is provided with a detection ring groove, and the outer surface of the detection ring groove is provided with an infrared sensing module. Anchor cable through grooves are provided on both sides of the detection ring groove.

[0007] The above technical solution uses an inwardly narrowing design for the detection groove, which reduces the distance between the infrared sensing module and the anchor cable surface. The infrared sensing module can then detect the anchor cable displacement data to determine the surface tension distribution of the anchor cable.

[0008] Preferably, both ends of the power supply assembly are provided with resistance measuring slots, and the variable sleeve is telescopically connected to the sensor housing through the resistance measuring slots.

[0009] Preferably, the variable sleeve is provided with four vibrating wire probes arranged in a ring, wherein a resistor block is provided at one end of each vibrating wire probe.

[0010] With the above technical solution, the variable sleeves at both ends of the sensor are telescopic structures with the housing. The variable sleeves are fixed to the anchor cable through a sealing locking block structure. When the load causes the steel cylinder to deform axially, the strain gauge and the steel cylinder deform synchronously. The deformation causes the strain gauge's vibrating wire to change stress, thereby changing the vibration frequency of the vibrating wire.

[0011] Preferably, the sealing lock block is fitted and connected to the variable sleeve through a limiting groove.

[0012] The above technical solution tightens the anchor cable by shortening the distance between the sealing blocks.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. With this utility model, the sensor structure can provide comprehensive coverage of the anchor cable through three different detection methods, and the three sets of detection data corroborate each other, thereby ensuring measurement accuracy;

[0015] 2. In this utility model, the variable sleeves at both ends of the sensor are telescopically connected to the housing. The variable sleeves are fixed to the anchor cable through a sealing locking block structure. When the load causes the steel cylinder to deform axially, the strain gauge and the steel cylinder deform synchronously. The deformation causes stress changes in the vibrating wire of the strain gauge, thereby changing the vibration frequency of the vibrating wire. Even if the deformation area is far from the sensor, the tensile force generated by the deformation will act on the variable sleeve, thereby driving the variable sleeve to move. The stress change of the anchor cable can be judged by the movement distance of the variable sleeve. Attached Figure Description

[0016] Figure 1 This is the overall front view of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0018] In the figure: 1. Sensor housing; 2. Data interface; 3. Variable sleeve; 101. Resistance measurement groove; 102. Power supply assembly; 103. Anchor cable through groove; 1021. Infrared sensing module; 1031. Detection ring groove; 301. Vibrating wire probe; 302. Limiting groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To address the issue that existing vibrating wire sensor structures detect anchor cable deformation through the deformation of the wire needle, but cannot accurately measure anchor cable stress in specific areas; please refer to... Figure 1-2 The present invention provides the following solution:

[0021] Reference Figure 1-2 A stress sensor for high-strength anchor cables includes a sensor housing 1, a data interface 2 on the outer surface of the sensor housing 1, and variable sleeves 3 at both ends of the sensor housing 1. The variable sleeves 3 are provided with sealing blocks 4 on their inner sides, which are arranged in a ring. A power supply assembly 102 is provided inside the sensor housing 1 and is electrically connected to the data interface 2.

[0022] In this embodiment, the anchor cable is inserted into the inside of one end of the sealing block 4 and then out through the inside of the other end of the sealing block 4. The anchor cable is locked by shortening the distance between the sealing blocks 4. This sensor structure can provide full coverage of the anchor cable through three different detection methods. The three sets of detection data corroborate each other, thereby ensuring measurement accuracy.

[0023] Reference Figure 2 The inner side of the power supply assembly 102 is provided with a detection ring groove 1031, and the outer surface of the detection ring groove 1031 is provided with an infrared sensing module 1021. An anchor cable through groove 103 is provided on both sides of the detection ring groove 1031.

[0024] In this embodiment, the detection annular groove 1031 adopts an inwardly narrowing design structure, which can reduce the distance between the infrared sensing module 1021 and the anchor cable surface. The infrared sensing module 1021 can sense the anchor cable displacement data, thereby determining the tension distribution on the anchor cable surface.

[0025] Reference Figure 2 The power supply assembly 102 has resistance measurement slots 101 at both ends. The variable sleeve 3 is telescopically connected to the sensor housing 1 through the resistance measurement slots 101. The variable sleeve 3 has four vibrating wire probes 301 inside. The vibrating wire probes 301 are arranged in a ring. One end of the vibrating wire probe 301 is provided with a resistance block. The sealing lock block 4 is connected to the variable sleeve 3 through the limiting slot 302.

[0026] In this embodiment, the variable sleeves 3 at both ends of the sensor are telescopically connected to the housing. The variable sleeves 3 are fixed to the anchor cable by the sealing locking block 4. When the load causes the steel cylinder to deform axially, the strain gauge and the steel cylinder deform synchronously. The deformation causes stress changes in the vibrating string of the strain gauge, thereby changing the vibration frequency of the vibrating string. The electromagnetic coil excites the vibrating string and measures its vibration frequency. The frequency signal is transmitted to the reading device via a cable, which can measure the strain that causes the deformation of the stressed steel cylinder. Substituting the calibration coefficient, the load value sensed by the anchor cable force gauge can be calculated. Even if the deformation area is far from the sensor, the tensile force generated by the deformation will act on the variable sleeves 3, thereby driving the variable sleeves 3 to move. The stress change of the anchor cable can be judged by the moving distance of the variable sleeves 3.

[0027] Working principle: During use, the anchor cable is inserted into the inside of one end of the sealing locking block 4 and then exits from the inside of the other end of the sealing locking block 4. The anchor cable is locked by shortening the distance between the sealing locking blocks 4. A detection ring groove 1031 is provided on the inner side of the power supply assembly 102, and an infrared sensing module 1021 is provided on the outer surface of the detection ring groove 1031. The detection ring groove 1031 adopts an inward narrowing design structure, which can reduce the distance between the infrared sensing module 1021 and the surface of the anchor cable. The infrared sensing module 1021 can sense the displacement data of the anchor cable. At the same time, the variable sleeves 3 at both ends of the sensor and the housing have a telescopic structure. The variable sleeves 3 are sealed. The locking block 4 structure is fixed to the anchor cable. When the load causes the steel cylinder to deform axially, the strain gauge and the steel cylinder deform synchronously. The deformation causes stress changes in the vibrating wire of the strain gauge, which can measure the strain that causes the deformation of the stressed steel cylinder. Even if the deformation area is far from the sensor, the tensile force generated by the deformation will act on the variable sleeve 3, thereby driving the variable sleeve 3 to move. The stress change of the anchor cable can be judged by the movement distance of the variable sleeve 3, thereby judging the surface tension distribution of the anchor cable. This sensor structure can provide comprehensive coverage of the anchor cable through three different detection methods. The three sets of detection data corroborate each other, thereby ensuring measurement accuracy.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stress sensor for high strength mooring lines, characterized by, The sensor housing (1) includes a data interface (2) on its outer surface and variable sleeves (3) on both ends of the sensor housing (1). The variable sleeves (3) are provided with sealing blocks (4) on their inner sides, and the sealing blocks (4) are arranged in a ring. The sensor housing (1) is provided with a power supply assembly (102) inside, and the power supply assembly (102) is electrically connected to the data interface (2).

2. A stress sensor for high strength mooring lines according to claim 1, characterised in that: The power supply assembly (102) has a detection ring groove (1031) on its inner side, and an infrared sensing module (1021) is provided on the outer surface of the detection ring groove (1031). Anchor cable through grooves (103) are provided on both sides of the detection ring groove (1031).

3. A stress sensor for high strength mooring lines according to claim 1, characterized in that: The power supply assembly (102) is provided with resistance measurement slots (101) at both ends, and the variable sleeve (3) is telescopically connected to the sensor housing (1) through the resistance measurement slots (101).

4. A stress sensor for high strength mooring lines according to claim 3, characterised in that: The variable sleeve (3) is provided with four vibrating wire probes (301) inside. The vibrating wire probes (301) are arranged in a ring. A resistor block is provided at one end of each vibrating wire probe (301).

5. A stress sensor for high strength mooring lines according to claim 4, characterised in that: The sealing lock block (4) is connected to the variable sleeve (3) through the limiting groove (302).

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