Real-time testing device for damping force of viscous damper and testing method thereof

Abstract

The present application belongs to the technical field of shock absorption, and particularly relates to a real-time testing device for damping force of a viscous damper and a testing method thereof; a sensor mounting hole is formed at each end cover of the viscous damper body, a through hole is formed at the cylinder end of the viscous damper body, a pressure sensor is embedded in the sensor mounting hole, a signal transmission line of the pressure sensor passes through the through hole and is connected to a data acquisition circuit, and the data acquisition circuit is connected to a computer terminal through the cloud; a calibration relationship equation is constructed by the pressure difference measured by the pressure sensors installed at both ends of the viscous damper and the damping force of the viscous damper, and the damping force of the viscous damper is calculated, which has a good linear relationship and can realize stable and accurate measurement. The pressure sensor implanted at the end cover of the viscous damper eliminates the influence of bad weather and unexpected conditions on the testing device, and realizes real-time monitoring of the damping force of the viscous damper.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shock absorption, and particularly relates to a real-time testing device for damping force of a viscous damper and a testing method thereof. BACKGROUND

[0002] The viscous damper generates damping force through interaction of viscous medium and damper structural components, provides additional damping for a structural system, and achieves the purpose of dissipating seismic input energy to ensure safety of structural components.

[0003] When an over-protection earthquake or extreme weather occurs, the damper piston rod moves at a high speed, the internal oil pressure rapidly increases, the damper medium may be abnormally leaked, or a large restoring force exceeding the bearing capacity of a certain connecting component of the damper may be generated, resulting in damage to the damper or structural failure; however, it is difficult to determine the state of the damper by visual observation, and maintenance measures cannot be provided in time.

[0004] Therefore, it is necessary to provide a real-time testing device for damping force of a viscous damper and a testing method thereof. SUMMARY

[0005] The present application aims to provide a real-time testing device for damping force of a viscous damper and a testing method thereof, which adopts a pressure sensor implanted at an end cover of the viscous damper, eliminates the influence of adverse weather and sudden conditions on the testing device, realizes real-time monitoring of the damping force of the viscous damper, monitors the damping force of the viscous damper, determines whether the damping force exceeds the design value, and provides scientific and reasonable maintenance to ensure safety of the shock absorption device and the building structure.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] A real-time testing device for damping force of a viscous damper, comprising a viscous damper body, a pressure sensor, a data acquisition circuit and a computer terminal, the viscous damper body comprising a cylinder body, a piston rod, an end cover and a damping medium, the cylinder body being provided with the damping medium, the end cover being arranged in the cylinder body, the piston rod extending into the cylinder body, a sensor mounting hole being formed at each of the end covers at both ends of the viscous damper body, a through hole being formed at an end portion of the cylinder body of the viscous damper body, and the pressure sensor being embedded in the sensor mounting hole, a signal transmission line of the pressure sensor being led out through the through hole and connected to the data acquisition circuit, and the data acquisition circuit being connected to the computer terminal through the cloud.

[0008] Further, the position of the through hole is consistent with the position of the sensor mounting hole.

[0009] Further, the force receiving surface of the pressure sensor is in contact with the damping medium.

[0010] Further, the cylinder body and the piston rod are both provided with a connecting hole.

[0011] Further, a real-time testing method of damping force of a viscous damper includes the following steps:

[0012] 1) A sensor mounting hole is formed at each end cover of the viscous damper body;

[0013] 2) A through hole is formed at the cylinder end of the viscous damper body, and the position of the through hole is consistent with the position of the sensor mounting hole;

[0014] 3) Two pressure sensors are embedded into the corresponding mounting holes;

[0015] 4) The end cover with the sensors is installed into the cylinder of the viscous damper body, the piston rod is installed, the damping medium is filled, and the viscous damper body with force sensors is formed;

[0016] 5) The signal transmission line of the sensor is passed out through the cylinder through hole and connected to the data acquisition circuit;

[0017] 6) The data acquisition circuit is connected to the computer terminal through the cloud;

[0018] 7) The damping force of the viscous damper body and the pressure difference of the two end pressure sensors are calibrated, and a set of calibration relationship equations are obtained;

[0019] 8) The pressure signals collected by the two end pressure sensors are transmitted to the computer terminal through the data acquisition circuit, and the pressure difference is solved;

[0020] 9) According to the calibration relationship equation, the damping force of the viscous damper can be solved.

[0021] Further, the damping force of the viscous damper body and the pressure difference of the two end pressure sensors are calibrated, including the following steps:

[0022] 1) A certain tensile and compressive load and loading frequency are applied to the viscous damper, that is, the size of the damping force is known;

[0023] 2) The pressure signals collected by the two end pressure sensors are transmitted to the computer terminal through the data acquisition circuit;

[0024] 3) The computer calculates the pressure difference;

[0025] 4) The applied tensile and compressive load and loading frequency are changed, and steps 1) to 3) are repeated to obtain multiple sets of damping force and pressure difference data;

[0026] 5) According to the multiple sets of data, a set of calibration relationship equations is fitted, and the solving equation of the damping force is F=f(P1, P2).

[0027] Further, in step 5), f(P1, P2) = k(P1-P2) + b, wherein P1, P2 are the measured values of the pressure sensors at both ends; k, b are calibration coefficients.

[0028] Further, the pressure sensor, the data acquisition circuit, the cloud and the computer terminal are all existing structures, and the control circuit can be realized through simple programming of those skilled in the art, which belongs to the common knowledge in the art, and only the use is described, without modification, so the control mode and the circuit connection are not described in detail.

[0029] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0030] The pressure sensor at the end cover of the implantable viscous damper is adopted to eliminate the influence of bad weather and sudden conditions on the test device, and to realize real-time monitoring of the damping force of the viscous damper.

[0031] The pressure difference measured by the pressure sensors installed at both ends of the viscous damper and the damping force of the viscous damper are used to construct a calibration relationship equation, and the damping force of the viscous damper is calculated, which has a good linear relationship and can realize stable and accurate measurement. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The present application is a structural schematic diagram.

[0033] In the figure, 1 is an end cover, 2 is a damping medium, 3 is a piston rod, 4 is a cylinder body, 5 is a signal transmission line, 6 is a pressure sensor, 7 is a data acquisition circuit, 8 is a cloud, and 9 is a computer terminal. DETAILED DESCRIPTION

[0034] As Figure 1 shown, in order to make the purpose, technical scheme and advantages of the present application clearer and more apparent, the present application will be further described in detail below in combination with the drawings and examples.

[0035] EXAMPLE

[0036] The utility model provides a kind of real-time testing device of viscous damper damping force, including viscous damper body, pressure sensor 6, data acquisition circuit 7 and computer terminal 9, viscous damper body includes cylinder body 4, piston rod 3, end cap 1 and damping medium 2, damping medium 2 is arranged in cylinder body 4, end cap 1 is arranged in cylinder body 4, piston rod 3 extends into cylinder body 4, sensor mounting hole is set in each at end cap 1 of both ends of viscous damper body, and through hole is set in the end of cylinder 1 of viscous damper body, and pressure sensor 6 is embedded in sensor mounting hole, the signal transmission line 5 of pressure sensor 6 is connected with data acquisition circuit 7 by through hole, data acquisition circuit 7 is connected with computer terminal 9 by cloud 8;The position of through hole is consistent with the position of sensor mounting hole;The force surface of pressure sensor 6 is in contact with damping medium 2;Both cylinder body 4 and piston rod 3 are provided with connecting hole;

[0037] Adopt the pressure sensor at the end cap of implantable viscous damper, eliminate the influence of bad weather and emergent condition to testing device, realize real-time monitoring to viscous damper damping force.

[0038] A kind of real-time testing method of viscous damper damping force includes the following steps:

[0039] 1) sensor mounting hole is set in each at end cap of both ends of viscous damper body;

[0040] 2) through hole is set in the end of cylinder of viscous damper body, and the position of through hole is consistent with the position of sensor mounting hole;

[0041] 3) two pressure sensors are embedded into corresponding mounting hole;

[0042] 4) the end cap with sensor is installed into the cylinder of viscous damper body, installs piston rod, fills damping medium, constitutes viscous damper body with force sensor;

[0043] 5) the signal transmission line of sensor is connected with data acquisition circuit by cylinder through hole;

[0044] 6) data acquisition circuit is connected with computer terminal by cloud;

[0045] 7) the pressure difference of the damping force of viscous damper body and two end pressure sensors is carried out data calibration, obtains a group of calibration relation equation;

[0046] 8) the pressure signal collected by two end pressure sensors is transmitted to computer terminal by data acquisition circuit, and pressure difference is solved;

[0047] 9) according to calibration relation equation, the damping force of viscous damper can be solved.

[0048] As preferred, the data of the damping force of the viscous damper body and the pressure difference of the pressure sensors at both ends are calibrated, including the following steps:

[0049] 1) a certain tension and compression load and loading frequency are applied to the viscous damper, that is, the size of the damping force is known;

[0050] 2) the pressure signals collected by the pressure sensors at both ends are transmitted to the computer terminal through the data acquisition circuit;

[0051] 3) the computer calculates the pressure difference;

[0052] 4) the applied tension and compression load and loading frequency are changed, and steps 1) to 3) are repeated to obtain a plurality of sets of damping force and pressure difference data;

[0053] 6) a set of calibration relationship equations is fitted according to the plurality of sets of data, and the damping force calculation equation is F=f(P1,P2).

[0054] As preferred, in step 5), f(P1,P2)=k(P1-P2)+b, wherein P1 and P2 are the measured values of the pressure sensors at both ends; k and b are calibration coefficients.

[0055] The pressure difference measured by the pressure sensors installed at both ends of the viscous damper and the damping force of the viscous damper are used to construct a calibration relationship equation to calculate the damping force of the viscous damper, which has a good linear relationship and can realize stable and accurate measurement; in addition, by recording the size of the damping force and comparing it with the design value, the working state of the viscous damper can be evaluated, and whether the damper is invalid can be judged; combined with the change trend of the damping force, the safety of the viscous damper is comprehensively evaluated, and a scientific and reasonable maintenance plan is made.

[0056] Working principle:

[0057] The pressure sensor 6 is installed on the two end covers 1, the signal of the pressure sensor 6 is output through the signal transmission line 5, the other end of the signal transmission line 5 is connected with the data acquisition circuit 7, the data acquisition circuit 7 transmits the collected data to the computer terminal 9 through the cloud transmission 8, the computer terminal 9 calculates the pressure difference of the data, and then calculates the damping force of the viscous damper according to the calibration relationship equation F=f(P1,P2).

[0058] While the application has been described with reference to numerous exemplary embodiments, it will be understood that various other modifications can be made within the scope of the application as disclosed herein. More particularly, many modifications can be made to the components and / or arrangements of the subject combinations within the scope and spirit of the disclosure, and applicants will not be limited to the specific recitations of the figures and the claims. Other aspects, features and advantages of the application will become apparent to those skilled in the art from the following description.

Claims

1. A device for real-time testing of the damping force of a viscous damper, comprising a viscous damper body, a pressure sensor (6), a data acquisition circuit (7) and a computer terminal (9), the viscous damper body comprising a cylinder (4), a piston rod (3), an end cap (1) and a damping medium (2), the cylinder (4) being provided with the damping medium (2) therein, the end cap (1) being arranged in the cylinder (4), and the piston rod (3) extending into the cylinder (4), characterized in that: A sensor mounting hole is formed at each end cover (1) of the viscous damper body, a through hole is formed at the end of the viscous damper body cylinder (1), a pressure sensor (6) is embedded in the sensor mounting hole, the signal transmission line (5) of the pressure sensor (6) is led out through the through hole and connected with the data acquisition circuit (7), the data acquisition circuit (7) is connected with the computer terminal (9) through the cloud (8); the position of the through hole is consistent with that of the sensor mounting hole; the force bearing surface of the pressure sensor (6) is in contact with the damping medium (2). ​ 2. The real-time testing device for the damping force of a viscous damper according to claim 1, characterized in that: The cylinder (4) and the piston rod (3) are provided with connecting holes.

3. A method for real-time testing of the damping force of a viscous damper, characterized in that: The method comprises the following steps: 1) A sensor mounting hole is formed at each end cover (1) of the viscous damper body; 2) A through hole is formed at the end of the viscous damper body cylinder (4), and the position of the through hole is consistent with that of the sensor mounting hole; 3) Two pressure sensors (6) are embedded in the corresponding mounting holes; 4) The end cover (1) with the sensor is installed into the viscous damper body cylinder (4), the piston rod (3) is installed, the damping medium (2) is filled, and the viscous damper body with the force sensor is formed; 5) The signal transmission line (5) of the sensor is led out through the through hole of the cylinder (4) and connected with the data acquisition circuit (7); 6) The data acquisition circuit (7) is connected with the computer terminal (9) through the cloud (8); 7) The damping force of the viscous damper body and the pressure difference of the two end pressure sensors (6) are calibrated, and a set of calibration relationship equations are obtained; The damping force of the viscous damper body and the pressure difference of the two end pressure sensors are calibrated, which comprises the following steps: 7.1) A certain tensile and compressive load and loading frequency are applied to the viscous damper, that is, the size of the damping force is known; 7.2) The pressure signals collected by the two end pressure sensors (6) are transmitted to the computer terminal (9) through the data acquisition circuit (7); 7.3) The computer calculates the pressure difference; 7.4) The tensile and compressive load and loading frequency are changed, and steps 1) to 3) are repeated to obtain multiple sets of damping force and pressure difference data; 7.5) According to the multiple sets of data, a set of calibration relationship equations are fitted, the damping force solving equation is F=f(P1, P2), f(P1, P2)=k(P1-P2)+b, wherein P1 and P2 are the measured values of the two end pressure sensors; k and b are calibration coefficients; 8) The pressure signals collected by the two end pressure sensors (6) are transmitted to the computer terminal (9) through the data acquisition circuit, and the pressure difference is solved; 9) According to the calibration relationship equation, the damping force of the viscous damper can be solved.

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