A solid-liquid mixing unidirectional force monitoring device and monitoring method

Abstract

The invention discloses a solid-liquid mixing one-way force monitoring device and method. The solid-liquid mixing one-way force monitoring device comprises an upper shell, a lower shell, a bearing body, light reflecting layers, color changing rings, polarizing films and guided cylinders; the upper shell and the lower shell have a same structure and are of a pie circular ring structure, layers of annular grooves which are inward are formed in the side walls of the shells, elastic pads are arranged in the grooves, the upper shell and the lower shell separately mount one sides where the elastic pads are arranged to the upper surface and the lower surface of the bearing body, so that the elastic pads are sealed in a sealed cavity formed by the shells, the bearing body and the sealed ring; thebearing body is of a cylinder structure with the hollow interior, the guided cylinders are arranged outside the bearing body, the upper shell and the lower shell, and holes are formed in the cylinderwalls of the guided cylinders and used for communicating the inside and outside of the guided cylinders; the exteriors of the guided cylinders are the annular color changing rings, an airtight accommodating cavity is formed by the upper shell, the lower shell, the bearing body, the guided cylinders and the color changing rings, and the airtight accommodating cavity is filled with silicone oil or ethyl alcohol; and the rings of light reflecting layers are arranged on the inner sides of the color changing rings, and the polarizing films are pasted on the outer sides of the color changing rings.The solid-liquid mixing one-way force monitoring device greatly improves the safety performance of engineering facilities.

Description

technical field [0001] The invention relates to a solid-liquid mixing unidirectional force monitoring device and a monitoring method, which belong to the field of sensing technology. Background technique [0002] There are many occasions in engineering that need to monitor or display unidirectional force, such as bolt tightening force in important occasions, axial force of anchor rod or anchor cable in rock engineering. Taking the bolt support in geotechnical engineering as an example, the axial force of the bolt is a one-way force, but due to the harsh construction conditions and the complex working state of the bolt, the monitoring of the axial force of the bolt is limited, which leads to roof fall And other safety accidents, which will cause huge economic losses and casualties. Therefore, it is of great significance to detect the quality of bolt support in time and test these forces for the normal maintenance of bolt support engineering and mine safety production. [00...

AI Technical Summary

Problems solved by technology

One uses a power source, such as a strain gauge, to monitor the stress of the anchor rod by using the strain of the anchor rod, but due to the need for a power source, the safety management is complicated, which brings great safety hazards to the management of the roadway

The other type does not need power supply, there are hydraulic type and pressure-sensitive paper type. The hydraulic type is composed of a hydraulic pressure box and a pressure gauge. The load is displayed by observing the value of the pressure gauge, but it cannot meet the long-distance observation required by the project; pressure-sensitive The paper type judges the axial force by the length of the indentation, but the color and length of the pressure-sensitive paper distributed in the circumferential direction are different, which is difficult to distinguish; there is also a Chinese invention patent CN105067169A which discloses a method for listening to the size and frequency of sound through a resonance plate. To distinguish the size of the axial force, Chinese invention patent

[0004] CN105067170A discloses a method of judging the magnitude of the axial force according to the sound of different frequencies through the hammering method, but this method requires relatively high personnel; The displacement of the spring is used to judge the axial force, but because the displacement is too small, it is very difficult to judge the axial force of the bolt directly by visually observing the degree of deformation

[0006] Chinese invention patent CN105675201A discloses a device consisting of a display mechanism and a load equalizing device. By applying the uniform pressure generated by the equalizing device to the color developing device, different colors are displayed to indicate the unidirectional force; the device uses a thin liquid pad To achieve equal loading, so as to achieve the identity of the displayed color, but this device has the following disadvantages, which makes it difficult to popularize after implementation: (1) The load is transmitted in two parts in parallel, one path of liquid 9 and color changing ring 8, and one path of carrier 10. The thermal expansion coefficients of the liquid 9 and the color-changing ring 8 are greater than the thermal expansion coefficient of the carrier 10, so when the ambient temperature changes, the device has the problem of color change caused by temperature changes, which cannot meet the engineering needs; (2) In order to solve the temperature change caused by the above-mentioned thermal expansion, Liquid 9 uses a small amount of liquid to control its expansion. However, when an eccentric load occurs, the shell 1 is likely to come into contact with the color-changing ring 8, resulting in the failure of the load equalization effect. Theory and experiments have proved that using a small amount of liquid cannot control thermal expansion at the same time Two problems caused by wrong color indication and contact between the housing 1 and the color changing ring 8

[0007] Chinese invention patent CN105547541A discloses a device consisting of an upper and lower housing, a carrier, and a color-developing mechanism. The pressure generated by the carrier is converted into different colors by the color-developing device to judge the unidirectional force; the device has the following disadvantages: (1) When eccentric loading occurs, the color uniformity is poor. Although an elastic pad is used, due to its internal friction, it cannot achieve a good load-sharing effect, resulting in uneven deformation of the carrier, resulting in uneven force on the color-changing ring. The results show that the color is uneven; (2) During the assembly process of the color-changing ring and the carrier, the assembly gap seriously affects the relationship between the display color and the load, thus putting forward high requirements for the processing accuracy of the color-changing ring and the carrier. Roughness also affects the uniformity of color. If the method of improving the processing accuracy is used to solve the problem, the conventional processing method cannot meet the requirements.

However, to apply this idea to unidirectional force detection, the following problems need to be solved: (1) how to convert force change into liquid pressure change; (2) pressure change caused by liquid thermal expansion; (3) when eccentric load, need Mechanism protection device, because the liquid cannot provide guiding function, that is, the patent only monitors the pressure of the liquid, and there is no problem of partial load, so it cannot be used for reference

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