Intelligent perception device and method for bearing capacity of plate rubber bearing

Abstract

The present invention discloses an intelligent bearing capacity sensing device and method for a plate rubber bearing, which includes a rubber plate, an inner cavity of the rubber plate, a metal plate, a force measuring sensor, a cable groove, a cable of the force measuring sensor, and an intelligent processing module; the inner cavity of the rubber plate is located inside the rubber plate, the metal plate is arranged inside the inner cavity of the rubber plate and is pasted on the upper surface of the inner cavity of the rubber plate, the force measuring sensor is located inside the inner cavity of the rubber plate and is in contact with the lower surface of the metal plate, the cable groove is communicated with the inner cavity of the rubber plate, one end of the cable of the force measuring sensor enters the inner cavity of the rubber plate through the cable groove and is connected to the force measuring sensor, and the other end of the cable of the force measuring sensor is correspondingly connected to the intelligent processing module arranged outside the rubber plate. In the technical solution of the present invention, the force measuring sensor located in the rubber of the plate bearing shares the total force borne by the bearing according to the ratio of their areas, and the measuring force of the force measuring sensor is within its measuring range, and high-precision force measuring data can be provided.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge traffic facilities and measurement, and particularly relates to an intelligent perception device and method for the bearing capacity of a plate rubber bearing. Background Art

[0002] At present, the bridge construction in China has developed rapidly. Bridges play a crucial role in alleviating the highway traffic load and ensuring the smooth development of transportation operations. A bridge generally consists of a bridge span structure, also known as the superstructure, piers and abutments, also known as the substructure, pier and abutment foundations, and bearings, etc. Among them, the bearing is an important force-transferring structural component of the bridge that connects the superstructure and the substructure. The bearing is located between the bridge and the cushion stone. It can reliably transfer the load and deformation borne by the bridge superstructure to the bridge substructure, and at the same time ensure the free deformation of the bridge superstructure under the action of factors such as load, temperature change, and concrete shrinkage, so that the actual stress situation of the structure conforms to the calculation diagram, playing a buffering role and protecting the beam end and pier cap from damage.

[0003] However, in recent years, bridge collapse accidents have occurred frequently. It is difficult to monitor the actual situation of bridges, and it is impossible to take timely measures to prevent bridge collapses. Therefore, the resulting loss of life and property is immeasurable. Bridge accidents are directly related to the bearings. By monitoring the stress data of the bearings, the health status of the bridges can be evaluated to avoid bridge accidents.

[0004] At present, bearings with force-measuring functions mainly use strain sensors pasted on the steel structure of the bearings, and use the strain generated by compressive deformation and the Young's modulus of the material to inversely calculate the bearing force. However, since the deformation of the steel structure is extremely small, the maximum strain measurement value of the strain sensor is usually at the 100 μe level, and the accuracy of the strain sensor is usually set at the 1 μe - 10 μe level. Therefore, it cannot accurately reflect the bearing force of the bearing. At the same time, temperature will also cause deformation of the steel structure of the bearing. In this method, the strain gauges cannot form a symmetrical bridge circuit and are greatly affected by temperature. There is still a large room for improvement in the performance of force-measuring bearings. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent perception device and method for the bearing capacity of a plate rubber bearing in view of the deficiencies of the prior art.

[0006] Technical solution: The technical solution adopted by the present invention to solve the problem is as follows: An intelligent perception device for the bearing capacity of a plate rubber bearing, comprising a rubber plate, an inner cavity of the rubber plate, a metal plate, a force sensor, a cable groove, a force sensor cable, and an intelligent processing module; the inner cavity of the rubber plate is located inside the rubber plate, the metal plate is arranged inside the inner cavity of the rubber plate and adhered to the upper surface of the inner cavity of the rubber plate, the force sensor is located inside the inner cavity of the rubber plate and contacts the lower surface of the metal plate, the cable groove communicates with the inner cavity of the rubber plate, one end of the force sensor cable enters the inner cavity of the rubber plate through the cable groove and is connected to the force sensor, and the other end of the force sensor cable is correspondingly connected to the intelligent processing module arranged outside the rubber plate.

[0007] [[ID=e3]]Further, the gap size between both ends of the metal plate and the two side walls of the inner cavity of the rubber plate is set to be 0.001 mm to 10 mm.

[0008] Further, the gap size between both ends of the force sensor and the two side walls of the inner cavity of the rubber plate is set to be 0.1 mm to 10 mm.

[0009] Further, there is a pre-tightening force or no pre-tightening force on the upper and lower surfaces of the metal plate, the force sensor, and the inner cavity of the rubber plate.

[0010] Further, the force sensor is set as an elastic body that generates deformation when stressed, and is converted into an electrical signal or an optical signal through a strain gauge sensor or a fiber Bragg grating sensor pasted at the deformed position of the elastic body, and the signal is transmitted to the intelligent processing module through the force sensor cable.

[0011] Further, the force sensor can be set as a piezoresistor or a piezoelectric sensor, and the resistance or the output charge changes when stressed, and the signal is transmitted to the intelligent processing module through the force sensor cable.

[0012] The present invention also provides an intelligent perception method for the bearing capacity of a plate rubber bearing. The intelligent processing module demodulates the electrical signal or optical signal of the force sensor and converts it into the force F1 received by the force sensor. According to F1, the force F2 of the intelligent force-measuring plate rubber bearing is calculated, and the formula is as follows: Wherein, S1 is the cross-sectional area of the inner cavity of the rubber plate, and S2 is the cross-sectional area of the rubber plate.

[0013] Further, the intelligent processing module demodulates the electrical signal or optical signal of the force sensor and converts it into the force F1 received by the force sensor. The calibration formula can also be obtained by calibrating the plate rubber bearing, and the force F2 of the intelligent force-measuring plate rubber bearing is calculated according to the calibration formula based on F1.

[0014] Further, the intelligent processing module can store the data of the force F2 of the intelligent force-measuring plate rubber bearing.

[0015] Furthermore, the intelligent processing module can send the force F2 data of the plate rubber intelligent force measuring bearing to a remote server for storage and display through 2G, 3G, 4G, 5G communication networks or a wired broadband network.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0017] (1) In the technical solution of the bearing rubber integrated force sensor of the present invention, the force sensor located in the plate bearing rubber shares the total force borne by the bearing according to the ratio of their areas, and the measured force of the force sensor is within its range, which can provide high-precision force measurement data;

[0018] (2) In the present invention, the area ratio of the bearing rubber to the force sensor is large, and the installation height of the force sensor is small, which has little impact on the overall structure of the bearing rubber and does not affect the normal use and service life of the bearing rubber and the bearing;

[0019] (3) The present invention also has data communication and data storage functions, and can record the force change of the bearing. Description of the drawings

[0020] Figure 1 It is a schematic structural diagram of the present invention. Detailed implementation manners

[0021] The present invention will be further illustrated below with reference to the drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0022] As Figure 1 shown, an intelligent perception device for the bearing capacity of a plate rubber bearing includes a rubber plate 21, an inner cavity 22 of the rubber plate, a metal plate 23, a force sensor 24, a cable groove 25, a force sensor cable 26, and an intelligent processing module 27; the inner cavity 22 of the rubber plate is located inside the rubber plate 21, the metal plate 23 is arranged inside the inner cavity 22 of the rubber plate and is adhered to the upper surface of the inner cavity 22 of the rubber plate, the force sensor 24 is located inside the inner cavity 22 of the rubber plate and is in contact with the lower surface of the metal plate 23, the cable groove 25 is communicated with the inner cavity 22 of the rubber plate, one end of the force sensor cable 26 enters the inner cavity 22 of the rubber plate through the cable groove 25 and is connected to the force sensor 24, and the other end of the force sensor cable 26 is correspondingly connected to the intelligent processing module 27 arranged outside the rubber plate 21.

[0023] The gap size between both ends of the metal plate 23 and the two side walls of the inner cavity 22 of the rubber plate is set to be 0.001 mm to 10 mm; the gap size between both ends of the force sensor 24 and the two side walls of the inner cavity 22 of the rubber plate is set to be 0.1 mm to 10 mm.

[0024] There is a pre-tightening force or no pre-tightening force on the upper and lower surfaces of the metal plate 23, the force sensor 24, and the inner cavity 22 of the rubber plate; the force sensor 24 is set as an elastic body that deforms when stressed, and is converted into an electrical signal or an optical signal through a strain gauge sensor or a fiber Bragg grating sensor pasted at the deformed position of the elastic body, and the signal is transmitted to the intelligent processing module 27 through the force sensor cable 26.

[0025] The force sensor 24 can be set as a piezoresistor or a piezoelectric sensor. When pressed, the resistance or the output charge changes, and the signal is transmitted to the intelligent processing module 27 through the force sensor cable 26.

[0026] The present invention also provides a method for intelligently sensing the bearing capacity of a plate-type rubber bearing. The intelligent processing module 27 demodulates the electrical signal or optical signal of the force sensor 24 and converts it into the force F1 received by the force sensor 24. According to F\\(_1\\), the force F2 of the plate-type rubber intelligent force-measuring bearing is calculated. The formula is as follows: Wherein, S1 is the cross-sectional area of the inner cavity 22 of the rubber plate, and S2 is the cross-sectional area of the rubber plate 21.

[0027] The intelligent processing module 27 demodulates the electrical signal or optical signal of the force sensor 24 and converts it into the force F1 received by the force sensor 24. It can also obtain a calibration formula by calibrating the plate-type rubber bearing, and calculate the force F2 of the plate-type rubber intelligent force-measuring bearing according to F1 using the calibration formula.

[0028] The intelligent processing module 27 can store the data of the force F2 of the plate-type rubber intelligent force-measuring bearing; the intelligent processing module 27 can send the data of the force F2 of the plate-type rubber intelligent force-measuring bearing to a remote server for storage and display through a 2G, 3G, 4G, 5G communication network or a limited broadband network.

[0029] The working principle of the present invention is as follows: After the plate rubber bearing is stressed, the rubber plate inside the bearing is subjected to the same magnitude of force, and the internal stress uniformity is relatively high. A cavity is provided inside the rubber plate, and there is a metal plate on the upper surface of the cavity in the rubber plate. The metal plate is in contact with the force measuring sensor below, and the force measuring sensor is in contact with the lower surface of the cavity. According to the relationship between force, strain, and acting area, the ratio of the force measured by the force measuring sensor to the force on the bearing is the ratio of the cross-sectional areas of the metal plate and the bearing rubber. At the same time, the calibration formula for the force measuring sensor and the force on the bearing can also be obtained through calibration, and the force on the bearing can be calculated using this calibration formula. The force measuring sensor is an elastic body that deforms when stressed. The strain gauge sensor or fiber Bragg grating sensor pasted at the position where the elastic body deforms converts the amount of deformation into an electrical signal or an optical signal. The force measuring sensor can also be a piezoresistor or a piezoelectric sensor, and the resistance or output charge changes after being pressed. The intelligent processing module converts the electrical signal or optical signal into the force measurement data of the force measuring sensor. The intelligent processing module can send the force data of the intelligent force measuring plate rubber bearing to the remote server for storage and display through 2G, 3G, 4G, 5G communication networks or a wired broadband network.

[0030] The present invention adopts the technical solution of integrating a force measuring sensor into the bearing rubber. The force measuring sensor located inside the rubber plate shares the total force borne by the bearing according to the ratio of their areas. The measured force of the force measuring sensor is within its measurement range, and high-precision force measurement data can be provided. The area ratio of the rubber plate to the force measuring sensor is relatively large, and the height of the force measuring sensor is also relatively small, which has little impact on the overall structure of the bearing rubber and does not affect the service life of the bearing rubber plate and the overall bearing. It has data communication and data storage functions and can record the force change situation of the bearing.

[0031] The above specific implementation manner is only a preferred embodiment of the present invention and is not used to limit the implementation and the scope of the claims of the present invention. All equivalent changes and modifications made based on the content of the patent protection scope of the present invention application should be included within the scope of the present invention patent application.

Claims

1. Intelligent perception device for bearing capacity of plate rubber bearing, characterized in that The invention comprises a rubber plate (21), a cavity (22) in the rubber plate, a metal plate (23), a force sensor (24), a cable groove (25), a force sensor cable (26) and an intelligent processing module (27); the cavity (22) in the rubber plate is located inside the rubber plate (21); the metal plate (23) is arranged inside the cavity (22) in the rubber plate and is adhered to the upper surface of the cavity (22) in the rubber plate; the force sensor (24) is located inside the cavity (22) in the rubber plate and is in contact with the lower surface of the metal plate (23); the cable groove (25) is connected to the cavity (22) in the rubber plate; one end of the force sensor cable (26) enters the cavity (22) in the rubber plate through the cable groove (25) and is connected to the force sensor (24); and the other end of the force sensor cable (26) is correspondingly connected to the intelligent processing module (27) arranged outside the rubber plate (21); The gap size between the two ends of the metal plate (23) and the two side walls of the cavity (22) in the rubber plate is set to 0.001mm to 10mm; The gap size between the two ends of the force sensor (24) and the two side walls of the cavity (22) in the rubber plate is set to 0.1 mm to 10 mm; The upper and lower surfaces of the metal plate (23), the force sensor (24) and the cavity (22) in the rubber plate have pre-tightening force or no pre-tightening force; The force sensor (24) is configured as an elastic body that deforms when subjected to force, and converts the force into an electrical signal or an optical signal through a strain gauge sensor or a fiber grating sensor attached to the deformed position of the elastic body, and transmits the signal to the intelligent processing module (27) through a force sensor cable (26); The force sensor (24) can be configured as a piezoresistor or a piezoelectric sensor, and when subjected to pressure, the resistance or output charge changes, and the signal is transmitted to the intelligent processing module (27) via the force sensor cable (26); The intelligent processing module (27) demodulates the electrical or optical signal of the force sensor (24) and converts it into the force F1 on the force sensor (24), and calculates the force F2 on the intelligent rubber bearing with plate type according to F1. The formula is as follows: Wherein, S1 is the cross-sectional area of the inner cavity (22) of the rubber plate, and S2 is the cross-sectional area of the rubber plate (21); the intelligent processing module (27) demodulates the electrical or optical signal of the force sensor (24) and converts it into the force F1 on the force sensor (24). The calibration formula can also be obtained by calibrating the intelligent rubber bearing with plate type, and the force F2 on the intelligent rubber bearing with plate type is calculated according to F1 by using the calibration formula; The intelligent processing module (27) can store the force F2 data of the plate-type rubber intelligent force-measuring support.

2. The intelligent perception method for the bearing capacity of the plate rubber bearing according to claim 1, characterized in that The intelligent processing module (27) can send the force F2 data of the plate-type rubber intelligent force measuring support to a remote server for storage and display via a 2G, 3G, 4G, 5G communication network or a limited broadband network.

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