A bolt sensor
A sensor and bolt technology, used in the installation of bolts, instruments, measuring devices, etc., can solve the problems of poor anti-interference ability, poor stability, poor precision, etc., to improve accuracy and precision, and reduce safety accidents. The probability of occurrence and the effect of ensuring construction safety
Active Publication Date: 2018-01-30
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology
[0004] Bolts work in the harsh environment of humidity and acid-base salt corrosion, which requires relatively high moisture-proof, corrosion-proof, and waterproof performance of the sensor, while the electrical sensor has poor anti-interference ability and poor stability in the long-term monitoring process , poor precision, short life and other defects
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[0044] In order to enable the sensor to work normally in the harsh environment in the roadway, and to make the measured data more accurate, it is convenient for the test system to analyze the data, so as to ensure the construction safety in the roadway.
[0045] see figure 1 , the embodiment of the present invention provides a bolt sensor, the bolt sensor includes: a fiber grating 1, an intermediate layer 2 and a bolt 3;
[0046] The fiber grating 1 includes an optical fiber and a grating, and the grating is etched on the optical fiber;
[0047] The fiber grating 1 is arranged inside the middle layer 2, and the anchor rod 3 is arranged outside the middle layer 2;
[0048] The fiber grating 1 is bonded inside the anchor rod 3 through the intermediate layer 2;
[0049] The fiber grating 1 is arranged at the center of the anchor rod 3 .
[0050]It can be seen from the above examples that through the arrangement of the fiber grating 1, the intermediate layer 2 and the anchor ro...
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Abstract
The invention discloses an anchor rod sensor, comprising a fiber grating, an intermediate layer and an anchor rod, wherein the fiber grating is arranged inside the intermediate layer, the anchor rod is arranged at an external part of the intermediate layer, and the fiber grating is adhered to the inner part of the anchor rod by means of the intermediate layer, and is arranged at a central position of the anchor rod. As the fiber grating, the intermediate layer and the anchor rod are arranged, the fiber grating and the anchor rod are effectively combined as a whole, so that the fiber grating can better sense stress and strain data of the anchor rod, accuracy and precision of measured data are increased, safety of people in a laneway is ensured, a safety accident probability is decreased, construction safety is better ensured, and the anchor rod sensor is convenient for a system to perform overall analysis.
Description
technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a bolt sensor. Background technique [0002] At present, bolts have been widely used in traditional geotechnical protection engineering, and are used to reinforce the surrounding rock of the roadway so that the surrounding rock can support itself. As an important means of guaranteeing safe production in roadways, the stress and strain detection of bolts has received more and more attention. The combination of bolts and stress-strain sensors can not only play a role in reinforcement, but also realize the detection of stress and strain in roadways. Ensure the safety of construction. [0003] In related technologies, electrical sensors are often used for force monitoring of anchor bolts, and resistance strain sensors are more commonly used. Resistance strain sensors use resistance strain gauges as conversion elements. The resistance strain sensor is composed of an el...
Claims
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IPC IPC(8): E21D21/02G01L1/24
CPCE21D21/02G01L1/242
Inventor 董建军彭泓杨荣明
Owner LIAONING TECHNICAL UNIVERSITY