Reinforcing steel bar stress-strain gauge
A technology of rebar stress and strain gauge, which is applied in the measurement of force by measuring the change of optical properties of the material when it is stressed, by the measurement of force by measuring the change of magnetic properties of the material caused by the applied stress, and the measurement of force, etc., which can solve the problem of stability. It has problems such as poor performance and susceptibility to environmental interference, and achieves the effect of high sensitivity and accurate measurement results.
Active Publication Date: 2020-04-14
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology
These instruments have disadvantages such as poor stability and susceptibility to environmental interference, so they cannot meet the needs of long-term steel bar monitoring.
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[0013] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0014] The steel bar stress strain gauge according to the present application includes a steel bar connecting rod 4 and an induction sleeve 10, the steel bar connecting rod 4 is coaxially connected with the steel bar 5 through a connecting ring 7, and the steel bar connecting rod 4 is set through the induction sleeve 10 and attached to the induction sleeve 10. The inner surface of the sleeve 10. The connecting ring 7 plays the role of connecting the reinforcing bar connecting rod 4 and the reinforcing bar, and both ends are internally provided with threads, and the connection mode is a deta...
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The application relates to a reinforcing steel bar stress-strain gauge comprising a reinforcing steel bar connecting rod and an induction sleeve. The reinforcing steel bar connecting rod is coaxiallyconnected with a reinforcing steel bar through a connecting ring; the reinforcing steel bar connecting rod penetrates the induction sleeve and is attached to the inner surface of the induction sleeve.An upper fiber bragg grating and a lower fiber bragg grating are symmetrically arranged on the inner wall of the induction sleeve in an up and down manner; a a sensitive string fixedly connected withthe induction sleeve is arranged in the induction sleeve outside of the upper fiber bragg grating and the lower fiber bragg grating; the, the sensitive string is in a tensioned state; an induction coil for sensing the vibration frequency of the sensitive string is further arranged on the outer side of the sensitive string; and the upper fiber bragg grating and the lower fiber bragg grating are both connected with temperature compensation fiber bragg gratings in series so as to counteract the influence of temperature. The reinforcing steel bar stress-strain gauge capable of realizing real-timemonitoring and determination has advantages of high measurement precision, high sensitivity, self-checking performance, simple structure, low cost and strong anti-interference capability and can be widely applied to various complex environments.
Description
technical field [0001] The application relates to a steel bar stress strain gauge, which is suitable for the technical field of engineering measurement. Background technique [0002] At present, steel bars in engineering are affected by factors such as material mechanical properties and external environment changes, making it very difficult to monitor changes in stress and strain of steel bars. The common reinforcement meter is a measuring instrument used to measure the stress of the concrete reinforcement of the engineering building, or as an anchor rod stress meter buried in the borehole of the bedrock, slope and underground structure wall that needs to be reinforced. Reinforcement gauges mainly include resistance strain gauge type, differential resistance type, vibrating wire type and other types. The resistance strain gauge type has poor durability and is easy to creep. The sensitivity of the differential resistance type steel bar meter is low. At the same time, the dif...
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Login to View More IPC IPC(8): G01B11/16G01B7/24G01L1/24G01L1/12
CPCG01B7/24G01B11/18G01L1/127G01L1/242
Inventor 段君淼张浩钟志鑫翟步升张雷郭志利周彦旭刘颖郑志超刘广逊李晓瑾王麒麟
Owner SHIJIAZHUANG TIEDAO UNIV