Snap ring-type force sensor
A force sensor and sensor technology, applied in the field of sensors, to achieve the effect of easy installation and elimination of bending stress
Inactive Publication Date: 2012-05-09
SHANGHAI INST OF TECH
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- Description
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- Application Information
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Problems solved by technology
[0002]Existing stress testing of circular shaft members is a relatively complicated task, which must be done on the working shaft such as grinding, cleaning, attaching strain gauges and building bridges. Since it is an on-site operation, it is difficult to guarantee the test accuracy
However, due to structural reasons, the existing force sensor can only be connected to the shaft end, and cannot be connected to other parts of the shaft, and the shaft end is often unable to install the sensor.
Some attached sensors fail to solve the problem of relative displacement (sliding) between the sensor and the working shaft under load and have a single function, so some compound loads cannot be tested
Method used
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Embodiment Construction
[0038] like Figure 1 to Figure 3 As shown, the snap ring force sensor includes a semicircular ring, a sensor elastic body, and a strain gauge. The two semicircular rings are connected by bolts to form a snap ring. The two snap rings are connected by the sensor elastic body, and the sensor elastic body is pasted There are resistance strain gauges.
[0039] When measuring tension and pressure, one end of the elastic body is T-shaped ( Figure 12 , 13), it is longitudinally connected with the T-shaped groove in one semi-circular ring, and the other end is longitudinally elliptical and longitudinally matched with the circular groove in the other semi-circular ring, and the resistance strain gauge is parallel to the axis on the sensor elastic body Stick one piece on each of the four sides, two pieces vertically and two pieces horizontally, and the corresponding surfaces have the same direction ( Figure 18 ).
[0040] When measuring torque, one end of the elastic body is T-shap...
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The invention relates to a snap ring-type force sensor. When pulling force or pressure force is detected, a T-shaped head of one end of an elastic body is connected with a T-shaped groove of a half ring in longitudinally-matched manner, and the other longitudinal elliptic end of the elastic body is connected with a round groove of the other half ring in a matched manner; and four resistance foil gauges are stuck on four sides of the elastic body of the sensor respectively, wherein four sides are parallel with an axes, two resistance foil gauges are stuck longitudinally while another two resistance foil gauges are stuck horizontally, directions of corresponding faces are the same and are on the same transversal surface, and the longitudinal position is h2+H2+(3-4)mm away from the top end of a rectangular head. When torque force is detected, one end of the elastic body is T-shaped and the other end of the elastic body is latitudinal elliptic; and two resistance foil gauges are stuck on two corresponding sides of the elastic body of the sensor respectively, wherein the two corresponding sides are at the depth of section, directions of the corresponding sides are the same and are on the same transversal surface, and the longitudinal position is h2+H2+(3-4)mm away from the top end of a rectangular head. The sensor can well transmit bending force generated by pulling force, pressingand torque, and is not affected by other deformation. Various functions of the sensor can be realized by using different elastic body combination.
Description
technical field [0001] The invention relates to a sensor, in particular to a strain type force sensor. Background technique [0002] Existing stress testing of circular shaft members is a relatively complicated task. Works such as grinding, cleaning, attaching strain gauges, and bridge assembly must be performed on the working shaft. Since it is an on-site operation, it is difficult to guarantee the test accuracy. However, due to structural reasons, the existing force sensor can only be connected to the shaft end, and cannot be connected to other parts of the shaft, and the shaft end is often unable to install a sensor. Some attached sensors fail to solve the problem of relative displacement (sliding) between the sensor and the working shaft under load and have a single function, so some composite loads cannot be tested. . It is also affected by other deformations under load. Contents of the invention [0003] The present invention is to provide a clasp-type force se...
Claims
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IPC IPC(8): G01L1/22
Inventor 夏荫培石钢杨斐瞿薇
Owner SHANGHAI INST OF TECH