A performance calibration device for a strain-acceleration composite sensor and its usage method

Abstract

This invention relates to a performance calibration device for a strain-accelerometer composite sensor. The device includes a calibration support plate, a strain calibration device, and an acceleration calibration device. The calibration support plate is parallel to a horizontal surface. The strain calibration device is located on the calibration support plate, and the acceleration calibration device is also located on the calibration support plate. This invention also provides a method for using the strain-accelerometer composite sensor performance calibration device. Compared with the prior art, the strain-accelerometer composite sensor performance calibration device of this invention has the advantage of achieving dynamic performance calibration of the composite sensor's strain and acceleration measurements.

Description

Technical Field

[0001] This invention relates to the field of sensor calibration technology, and in particular to a performance calibration device for a strain-acceleration composite sensor and its usage method. Background Technology

[0002] Strain sensors are crucial for monitoring the strain of soil and rock materials in civil engineering indoor model tests, construction site tests, and shaking table model tests. The accuracy and reliability of strain sensor measurements under dynamic loads such as seismic and traffic loads are important mechanical parameters characterizing the deformation and failure of soil and rock structures. Accelerometers are critical for monitoring the magnitude of acceleration during vibration in soil and rock masses during physical model tests such as dynamic centrifuge model tests and shaking table model tests. The dynamic performance of strain and accelerometers significantly impacts the accuracy and reliability of measuring parameters such as strain and acceleration in soil and rock test models under seismic loading, particularly in shaking table model tests and other geotechnical physical model tests.

[0003] While current technology has developed calibration devices for strain sensors and accelerometers, there is a lack of calibration devices that combine the two. Furthermore, existing strain sensor calibration devices only meet the requirements for accuracy and stability calibration in static testing, but lack the requirements for accuracy and stability calibration in dynamic testing. At the same time, the bandwidth of accelerometer calibration devices is very limited, making it difficult to meet the simultaneous requirements for high-frequency and low-frequency acceleration calibration.

[0004] Therefore, how to provide a performance calibration device for a strain-acceleration composite sensor that can achieve the technical effect of dynamic performance calibration of the strain and acceleration of the composite sensor is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the problems existing in the prior art, the technical problem to be solved by the present invention is to provide a performance calibration device for a strain-acceleration composite sensor, so as to achieve the technical effect of dynamic performance calibration of strain and acceleration of the composite sensor.

[0006] To achieve the above objectives, the present invention provides a performance calibration device for a strain-acceleration composite sensor. The device includes: a calibration support base plate, parallel to a horizontal surface; a strain calibration device located on the calibration support base plate, comprising a strain fixing component and a strain moving component, the strain fixing component being fixedly connected to the calibration support base plate, and the strain moving component being slidably connected to the calibration support base plate; a composite sensor fixed between the strain fixing component and the strain moving component; and an acceleration calibration device located on the calibration support base plate, comprising a vibration component and an acceleration fixing component, the acceleration fixing component being located on one side of the composite sensor, one end of the vibration component being fixedly connected to the acceleration fixing component, and the other end of the vibration component being disposed opposite to the composite sensor.

[0007] In the first aspect, the performance calibration device for the strain-acceleration composite sensor further includes a data acquisition and analysis device, which includes a strain acquisition instrument and an acceleration acquisition instrument; one output terminal of the composite sensor is electrically connected to the strain acquisition instrument through the strain movement component; the other output terminal of the composite sensor is electrically connected to the acceleration acquisition instrument through the acceleration fixing component.

[0008] In the first aspect, the strain fixing assembly includes: a strain fixing platform fixedly connected to the calibration support base plate; two first servo motors, the fixed ends of which are respectively fixedly connected to the strain fixing platform; a first first servo motor located below the second first servo motor; a strain parameter control system located on the strain fixing platform; the strain parameter control system being electrically connected to the two first servo motors respectively; two moving screws, each corresponding to one of the two first servo motors, the fixed end of each moving screw being fixedly connected to the working end of a corresponding first servo motor; and four rapid traversing guide rails, which are respectively arranged around the two moving screws and parallel to each other, one end of each rapid traversing guide rail being fixedly connected to the strain fixing platform.

[0009] In the first aspect, the strain-moving assembly includes: a moving test module, which has four sliding holes, each corresponding to one of the four rapid-moving guide rails; the moving test module also has two connecting holes, each corresponding to one of the two moving screws, each moving screw being adapted to a corresponding connecting hole, and the moving end of each moving screw passing through a corresponding connecting hole and movably connected to the moving test module; and four limiters, each limiter corresponding to one of the four rapid-moving guide rails, with the other end of each rapid-moving guide rail passing through a corresponding sliding hole and fixed to a corresponding limiter. The system includes: a connection where each of the rapid-moving guide rails is slidably connected to the mobile test module; two sets of sliding components, each set of which is located at the bottom of the mobile test module, each set including two sliding wheels, each sliding wheel being slidably connected to the mobile test module; a strain signal acquisition device located within the mobile test module, the input end of which is electrically connected to an output end of the composite sensor; and a strain data acquisition connector located on the mobile test module, the input end of which is electrically connected to the output end of the strain signal acquisition device, and the output end of which is electrically connected to the strain acquisition instrument.

[0010] In the first aspect, the strain-acceleration composite sensor performance calibration device further includes: two clamping connecting plates, one end of which is located between the two first servo motors and fixedly connected to the strain fixing platform, and one end of which is fixedly connected to the moving test module; two sensor positioning clamps, with the composite sensor arranged between the two sensor positioning clamps; the two sensor positioning clamps are arranged one-to-one with the two clamping connecting plates, one end of each sensor positioning clamp is detachably and fixedly connected to the other end of the corresponding clamping connecting plate, and the other end of each sensor positioning clamp is detachably and fixedly connected to the composite sensor.

[0011] In the first aspect, each of the sensor positioning fixtures includes: two fixture bodies, each fixture body having a semi-circular structure, each fixture body having two fixing holes at one end, and an adjustment hole in the middle of each fixture body; two fixing screws, the two fixing screws being arranged one-to-one with the two fixing holes; and an adjustment screw, one end of which passes sequentially through the adjustment hole on the two fixture bodies and is detachably fixedly connected to the two fixture bodies, so that the composite sensor is detachably fixed between the other ends of the two fixture bodies; wherein, the other end of each fixture connecting plate is located between the two fixture bodies of a corresponding sensor positioning fixture, and the other end of each fixture connecting plate has two threaded holes, the two threaded holes being arranged one-to-one with the two fixing holes, and each fixing screw sequentially passing through a corresponding fixing hole, two threaded holes, and a corresponding fixing hole on one fixture body and is detachably fixedly connected to the fixture connecting plate.

[0012] In the first aspect, the vibration assembly includes: a second servo motor; a wideband vibration screw, wherein the fixed end of the wideband vibration screw is fixedly connected to the working end of the second servo motor, and the movable end of the wideband vibration screw is disposed opposite to the composite sensor.

[0013] In a first aspect, the acceleration fixing assembly includes: an acceleration fixing platform located on one side of the composite sensor; a fixed end of the second servo motor fixedly connected to the acceleration fixing platform; an acceleration parameter control system located on the acceleration fixing platform and electrically connected to the second servo motor; a vibration signal acquisition device located within the strain fixing platform, with its input end electrically connected to the other output end of the composite sensor; an acceleration signal transmission tube, one end of which is connected to the output end of the vibration signal acquisition device; and an acceleration data acquisition connector, the input end of which is connected to the acceleration signal transmission tube, and its output end electrically connected to the acceleration acquisition device.

[0014] In the first aspect, the data acquisition and analysis device further includes: a strain analysis system electrically connected to the strain acquisition instrument; and an acceleration analysis system electrically connected to the acceleration acquisition instrument.

[0015] This invention also provides a method for using a performance calibration device for a strain-acceleration composite sensor, for use with the aforementioned performance calibration device. The method includes: installing the performance calibration device; fixing the composite sensor to two sensor positioning fixtures; calibrating the initial parameters of the strain parameter control system and the acceleration parameter control system; inputting strain calibration parameters into the strain parameter control system to control the rotation of two first servo motors, causing the moving screw to rotate and drive the moving test module to move away from the strain fixing platform; simultaneously collecting the strain electrical signal from the composite sensor through a strain signal acquisition device; transmitting the strain electrical signal to a strain acquisition instrument through a strain data acquisition connector; the strain acquisition instrument converting the strain electrical signal into a strain signal and transmitting it to a strain analysis system to obtain the actual performance of the composite sensor. Strain curve; In the acceleration parameter control system, acceleration calibration parameters are input to control the second servo motor. The second servo motor controls a wide-frequency vibration screw to perform a pre-set regular reciprocating extension and retraction motion, causing the composite sensor to vibrate. Simultaneously, a vibration signal acquisition device collects the vibration electrical signal from the composite sensor, and transmits the vibration electrical signal to the acceleration data acquisition connector through an acceleration data transmission tube, thereby transmitting it to an acceleration acquisition instrument. The acceleration acquisition instrument converts the vibration electrical signal into an acceleration signal and transmits it to the acceleration analysis system to obtain the actual acceleration curve of the composite sensor. Theoretical strain curves and theoretical acceleration curves of the composite sensor are obtained through theoretical analysis of the strain parameter control system and the acceleration parameter control system, respectively. By comparing the theoretical and actual strain and acceleration curves of the composite sensor, the strain and acceleration test performance of the composite sensor is calibrated.

[0016] Beneficial effects The strain-acceleration composite sensor performance calibration device of the present invention includes a calibration support base plate, a strain calibration device, an acceleration calibration device, and a data acquisition and analysis device. The calibration support base plate provides a test platform for the strain calibration device and the acceleration calibration device. The strain calibration device includes a strain moving component and a strain fixing component. The strain fixing component is fixed on the calibration support base plate, and the strain moving component can slide on the calibration support base plate. The composite sensor is a strain-acceleration miniature composite sensor. The composite sensor is fixed between the strain moving component and the strain fixing component. When the strain moving component slides away from the strain fixing component, the composite sensor is stretched. The strain electrical signal of the composite sensor is collected by the strain moving component and transmitted to the strain acquisition instrument to be converted into a strain signal. Then, it is transmitted to the strain analysis system to form an actual strain curve, thereby obtaining the dynamic strain curve of the composite sensor to achieve dynamic performance calibration of the composite sensor. The acceleration calibration device includes a vibration component and an acceleration fixing component. During the tensile process of the composite sensor, the vibration component acts on the composite sensor to cause it to vibrate. The acceleration fixing component collects the vibration electrical signal of the composite sensor and transmits it to an acceleration acquisition instrument, which converts it into an acceleration signal. This signal is then transmitted to an acceleration analysis system to form an actual acceleration curve, thus obtaining the dynamic acceleration curve of the composite sensor and achieving dynamic performance calibration of the composite sensor's acceleration. In summary, the strain-acceleration composite sensor performance calibration device of this invention monitors the dynamic change of the composite sensor's strain under tensile action using a strain calibration device and monitors the dynamic change of the composite sensor's acceleration value under tensile action during vibration using an acceleration calibration device. This achieves dynamic performance calibration of the composite sensor's strain and acceleration tests. Furthermore, this strain-acceleration composite sensor performance calibration device of this invention implements a fully automatic control mode, shortening the calibration time, improving the calibration efficiency and speed of the composite sensor, and also improving the calibration accuracy and precision of the composite sensor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the performance calibration device for a strain-acceleration composite sensor according to the present invention.

[0019] Figure 2 This is the invention Figure 1 The front view.

[0020] Figure 3 This is the invention Figure 1 Top view.

[0021] Figure 4 This is the invention Figure 1 The left view.

[0022] Figure 5 This is the invention Figure 1 The right view.

[0023] Figure 6 This is the invention Figure 1 Rear view.

[0024] Figure 7 This is a schematic diagram of the connection structure of the mobile testing module, strain data acquisition connector, and fixture connection plate of the present invention.

[0025] Figure 8 This is a schematic diagram of the connection structure of the strain fixing component, limiter, and clamp connecting plate of the present invention.

[0026] Figure 9 This is a schematic diagram of the acceleration calibration device of the present invention.

[0027] Figure 10 This is a schematic diagram of the sensor positioning fixture of the present invention.

[0028] Figure label: 1. Calibrate the support base plate; 2. Strain calibration device; 21. Strain fixing assembly; 211. Strain fixing platform; 212. First servo motor; 213. Strain parameter control system; 214. Moving screw; 215. Rapid traverse guide rail; 22. Strain moving assembly; 221. Moving test module; 222. Limiter; 223. Sliding assembly; 224. Strain data acquisition connector; 3. Composite sensor; 4. Acceleration calibration device; 41. Vibration assembly; 411. Second servo motor; 412. Wideband vibration screw; 42. Acceleration fixing assembly; 421. Acceleration fixing platform; 422. Acceleration parameter control system; 423. Acceleration signal transmission tube; 424. Acceleration data acquisition connector; 5. Strain gauge; 6. Accelerometer; 7. Fixture connecting plate; 8. Sensor positioning fixture; 81. Fixture body; 82. Fixing screw; 83. Adjusting screw; 9. Strain analysis system; 10. Acceleration analysis system; 2201. Sliding hole; 2202. Connecting hole; 701. Threaded hole. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0030] Example 1 like Figures 1-10 As shown, the present invention provides a performance calibration device for a strain-acceleration composite sensor. The performance calibration device includes: a calibration support base plate 1, which is parallel to a horizontal ground; a strain calibration device 2, which is located on the calibration support base plate 1 and includes a strain fixing component 21 and a strain moving component 22. The strain fixing component 21 is fixedly connected to the calibration support base plate 1, and the strain moving component 22 is slidably connected to the calibration support base plate 1; a composite sensor 3 is fixed between the strain fixing component 21 and the strain moving component 22; and an acceleration calibration device 4, which is located on the calibration support base plate 1 and includes a vibration component 41 and an acceleration fixing component 42. The acceleration fixing component 42 is located on one side of the composite sensor 3, one end of the vibration component 41 is fixedly connected to the acceleration fixing component 42, and the other end of the vibration component 41 is disposed opposite to the composite sensor 3.

[0031] The strain-acceleration composite sensor performance calibration device of the present invention includes a calibration support base plate, a strain calibration device, an acceleration calibration device, and a data acquisition and analysis device. The calibration support base plate provides a test platform for the strain calibration device and the acceleration calibration device. The strain calibration device includes a strain moving component and a strain fixing component. The strain fixing component is fixed on the calibration support base plate, and the strain moving component can slide on the calibration support base plate. The composite sensor is a strain-acceleration miniature composite sensor. The composite sensor is fixed between the strain moving component and the strain fixing component. When the strain moving component slides away from the strain fixing component, the composite sensor is stretched. The strain electrical signal of the composite sensor is collected by the strain moving component and transmitted to the strain acquisition instrument to be converted into a strain signal. Then, it is transmitted to the strain analysis system to form an actual strain curve, thereby obtaining the dynamic strain curve of the composite sensor to achieve dynamic performance calibration of the composite sensor. The acceleration calibration device includes a vibration component and an acceleration fixing component. During the tensile process of the composite sensor, the vibration component acts on the composite sensor to cause it to vibrate. The acceleration fixing component collects the vibration electrical signal of the composite sensor and transmits it to an acceleration acquisition instrument, which converts it into an acceleration signal. This signal is then transmitted to an acceleration analysis system to form an actual acceleration curve, thus obtaining the dynamic acceleration curve of the composite sensor and achieving dynamic performance calibration of the composite sensor's acceleration. In summary, the strain-acceleration composite sensor performance calibration device of this invention monitors the dynamic change of the composite sensor's strain under tensile action using a strain calibration device and monitors the dynamic change of the composite sensor's acceleration value under tensile action during vibration using an acceleration calibration device. This achieves dynamic performance calibration of the composite sensor's strain and acceleration tests. Furthermore, this strain-acceleration composite sensor performance calibration device of this invention implements a fully automatic control mode, shortening the calibration time, improving the calibration efficiency and speed of the composite sensor, and also improving the calibration accuracy and precision of the composite sensor.

[0032] In some possible implementations, the performance calibration device for the strain-acceleration composite sensor further includes a data acquisition and analysis device, which includes a strain acquisition instrument and an accelerometer 6; one output terminal of the composite sensor 3 is electrically connected to the strain acquisition instrument 5 through the strain moving component 22; the other output terminal of the composite sensor 3 is electrically connected to the accelerometer 6 through the acceleration fixing component 42.

[0033] Specifically, the strain acquisition instrument is used to convert strain electrical signals into strain signals; the acceleration acquisition instrument is used to convert vibration electrical signals into acceleration signals.

[0034] In some possible implementations, the strain fixing assembly 21 includes: a strain fixing platform 211, which is fixedly connected to the calibration support base plate 1; two first servo motors 212, the fixed ends of which are respectively fixedly connected to the strain fixing platform 211; the first first servo motor 212 is located below the second first servo motor 212; a strain parameter control system 213, which is located on the strain fixing platform 211; the strain parameter control system 213 is electrically connected to the two first servo motors 212; two moving screws 214, which are arranged one-to-one with the two first servo motors 212, the fixed end of each moving screw 214 being fixedly connected to the working end of a corresponding first servo motor 212; and four rapid moving guide rails 215, which are arranged around the two moving screws 214 and parallel to each other, one end of each rapid moving guide rail 215 being fixedly connected to the strain fixing platform 211.

[0035] Specifically, by inputting strain calibration parameters into the strain parameter control system, the first servo motor is controlled to rotate, causing the moving screw to rotate, thus moving the moving test module away from the strain fixed platform on the calibration support base plate. The strain parameter control system includes a button section and a digital display module. The button section can input strain calibration parameters, and the digital display module can display the tensile values. The rapid traverse guide rail is used to ensure that the moving test module does not deviate from its trajectory during the movement.

[0036] In some possible implementations, the strain-moving component 22 includes: a moving test module 221, which has four sliding holes 2201, each corresponding to one of the four rapid moving guide rails 215; the moving test module 221 also has two connecting holes 2202, each corresponding to one of the two moving screws 214, each moving screw 214 being adapted to a corresponding connecting hole 2202, and the moving end of each moving screw 214 passing through a corresponding connecting hole 2202 and being movably connected to the moving test module 221; and four limiters 222, each corresponding to one of the four rapid moving guide rails 215, with the other end of each rapid moving guide rail 215 passing through a corresponding sliding hole 2201. Each of the following components is fixedly connected to a corresponding limiter 222, and each of the rapid movement guide rails 215 is slidably connected to the mobile test module 221; two sets of sliding components 223 are respectively arranged at the lower part of the mobile test module 221, each set of sliding components 223 includes two sliding wheels, and each sliding wheel is slidably connected to the mobile test module 221; a strain signal acquisition device is located inside the mobile test module 221, and the input end of the strain signal acquisition device is electrically connected to an output end of the composite sensor 3; a strain data acquisition connector 224 is located on the mobile test module 221, and the input end of the strain data acquisition connector 224 is electrically connected to the output end of the strain signal acquisition device, and the output end of the strain data acquisition connector 224 is electrically connected to the strain acquisition instrument 5.

[0037] Specifically, the sliding hole is used for the rapid traversing guide rail to slide on; the connecting hole is threaded and matches the moving screw, allowing the moving screw to drive the moving test module away from the strain fixing platform during rotation; the limiter is used to prevent the moving test module from slipping off the rapid traversing guide rail; the pulleys in the sliding assembly are used to allow the moving test module to slide on the calibration support base plate, and each set of sliding assemblies includes two pulleys to reduce the friction between the moving test module and the calibration support base plate when the moving test module moves; the strain signal acquisition device is used to acquire the strain electrical signal of the composite sensor during the tensile process; the strain data acquisition connector is used to transmit the strain electrical signal acquired by the strain signal acquisition device to the strain acquisition instrument.

[0038] In some possible implementations, the strain-acceleration composite sensor performance calibration device further includes: two clamping connecting plates 7, one end of which is located between the two first servo motors 212 and fixedly connected to the strain fixing platform 211, and the other end of which is fixedly connected to the moving test module 221; two sensor positioning clamps 8, with the composite sensor 3 arranged between the two sensor positioning clamps 8; the two sensor positioning clamps 8 are arranged one-to-one with the two clamping connecting plates 7, one end of each sensor positioning clamp 8 is detachably and fixedly connected to the other end of the corresponding clamping connecting plate 7, and the other end of each sensor positioning clamp 8 is detachably and fixedly connected to the composite sensor 3.

[0039] Specifically, the fixture connecting plate connects the sensor positioning fixture to the strain fixing platform and the sensor positioning fixture to the mobile testing module; the sensor positioning fixture is used to fix the composite sensor.

[0040] In some possible implementations, each of the sensor positioning fixtures 8 includes: two fixture bodies 81, each fixture body 81 having a semi-circular structure, each fixture body 81 having two fixing holes at one end, and each fixture body 81 having an adjustment hole in the middle; two fixing screws 82, the two fixing screws 82 being arranged one-to-one with the two fixing holes; and an adjustment screw 83, one end of the adjustment screw 83 passing through the adjustment holes on the two fixture bodies 81 and being detachably and fixedly connected to the two fixture bodies 81, so that the composite sensor 3 can be detachably fixed. Between the other ends of the two clamp bodies 81; wherein, the other end of each clamp connecting plate 7 is located between the two clamp bodies 81 of a corresponding sensor positioning clamp 8, and the other end of each clamp connecting plate 7 has two threaded holes 701, the two threaded holes 701 are arranged one-to-one with the two fixing holes, and each fixing screw 82 passes through the corresponding fixing hole, the two threaded holes 701 on one clamp body 81 and the corresponding fixing hole on the other clamp body 81 in sequence and is detachably fixedly connected to the clamp connecting plate 7.

[0041] Specifically, the fixing screw, combined with the fixing hole and the threaded hole, is used to fix the fixture body to the fixture connecting plate; the adjusting screw, combined with the adjusting hole, is used to adjust the tightness of the two fixture bodies clamping the composite sensor.

[0042] In some possible implementations, the vibration assembly 41 includes: a second servo motor 41; a wideband vibration screw 412, the fixed end of which is fixedly connected to the working end of the second servo motor 411, and the moving end of which is disposed opposite to the composite sensor 3; the acceleration fixing assembly 42 includes: an acceleration fixing platform 421, the acceleration fixing platform 421 being located on one side of the composite sensor 3; the fixed end of the second servo motor 411 being fixedly connected to the acceleration fixing platform 421; and an acceleration parameter control system 422, the acceleration parameter control system 422 being located on the acceleration fixing platform 3. On platform 421, the acceleration parameter control system 422 is electrically connected to the second servo motor 411; a vibration signal acquisition device is located inside the acceleration fixed platform 421, and the input end of the vibration signal acquisition device is electrically connected to the other output end of the composite sensor 3; an acceleration signal transmission tube 423 is connected at one end to the output end of the vibration signal acquisition device; an acceleration data acquisition connector 424 is connected at the input end of the acceleration signal transmission tube 423 and at the output end of the acceleration data acquisition connector 424 is electrically connected to the acceleration acquisition instrument 6.

[0043] Specifically, the acceleration parameter control system is used to perform digital-to-analog conversion on the acceleration calibration parameters to obtain control signals, and output the control signals to the second servo motor; by inputting the acceleration calibration parameters into the acceleration parameter control system, the second servo motor is controlled to extend and shorten, causing the broadband vibration screw to perform a pre-set regular extension and retraction action, causing the composite sensor to vibrate; the vibration signal acquisition device is used to acquire the vibration signal of the composite sensor; the acceleration transmission tube is used to transmit the vibration signal to the acceleration data acquisition connector.

[0044] In some possible implementations, the data acquisition and analysis device further includes: a strain analysis system 9, which is electrically connected to the strain acquisition instrument 5; and an acceleration analysis system 10, which is electrically connected to the acceleration acquisition instrument 6.

[0045] Specifically, the strain analysis system is used to generate actual strain curves from the received strain signals; the acceleration analysis system is used to generate actual acceleration curves from the received acceleration signals.

[0046] Example 2 like Figures 1-10As shown, Embodiment 2 of the present invention provides a method for using a strain-acceleration composite sensor performance calibration device, which is used in the application of the strain-acceleration composite sensor performance calibration device of Embodiment 1. The method includes: installing the strain-acceleration composite sensor performance calibration device; fixing the composite sensor on two sensor positioning fixtures; calibrating the initial parameters of the strain parameter control system and the acceleration parameter control system; inputting strain calibration parameters into the strain parameter control system to control the rotation of two first servo motors, causing the moving screw to rotate and drive the moving test module to move away from the strain fixing platform; simultaneously collecting the strain electrical signal in the composite sensor through a strain signal acquisition device; transmitting the strain electrical signal to a strain acquisition instrument through a strain data acquisition connector; the strain acquisition instrument converting the strain electrical signal into a strain signal and transmitting it to a strain analysis system to obtain the composite sensor. The actual strain curve of the device is obtained; in the acceleration parameter control system, the acceleration calibration parameters are input to control the second servo motor to work. The second servo motor controls the broadband vibration screw to perform a pre-set regular reciprocating extension and retraction action to make the composite sensor vibrate. At the same time, the vibration signal in the composite sensor is collected by the vibration signal acquisition device and transmitted to the acceleration data acquisition connector through the acceleration data transmission tube, and then transmitted to the acceleration acquisition instrument. The acceleration acquisition instrument converts the vibration signal into an acceleration signal and transmits it to the acceleration analysis system to obtain the actual acceleration curve of the composite sensor; through theoretical analysis of the strain parameter control system and the acceleration parameter control system, the theoretical strain curve and theoretical acceleration curve of the composite sensor are obtained respectively; by comparing the theoretical and actual strain curves and acceleration curves of the composite sensor, the strain and acceleration test performance of the composite sensor is calibrated.

[0047] Specifically, when the strain calibration device and acceleration calibration device are in operation, the strain signal acquisition device acquires strain electrical signals and transmits them to the strain acquisition instrument. The strain acquisition instrument converts the strain electrical signals into strain signals and transmits them to the strain analysis system, thereby plotting the actual strain curve. Similarly, the acceleration signal acquisition device acquires acceleration electrical signals and transmits them to the acceleration acquisition instrument. The acceleration acquisition instrument converts the acceleration electrical signals into acceleration signals and transmits them to the acceleration analysis system, thereby plotting the actual acceleration curve. The strain calibration parameters are set through the strain parameter control system. These strain calibration parameters include the first servo... The rotational speed and duration parameters of the first servo motor are controlled to rotate the moving screw, thereby driving the moving test module away from the strain-fixed platform. This causes the composite sensor to be stretched. The strain signal of the composite sensor during the stretching process is then collected by the strain signal acquisition device to generate the actual strain curve. Simultaneously, during the stretching process of the composite sensor, acceleration calibration parameters are set by the acceleration parameter control system. These acceleration calibration parameters include the vibration frequency, amplitude, and duration parameters of the second servo motor. The system then controls the... The second servo motor performs elongation and shortening movements, controlling the broadband vibration screw to perform regular extension and retraction actions, causing the composite sensor to vibrate. An acceleration signal acquisition device then collects the acceleration electrical signal of the composite sensor during the stretching process, finally generating the actual acceleration curve. The strain calibration parameters are set through the strain parameter control system, including the rotational speed and duration of the first servo motor. Using the rotational speed and duration parameters of the first servo motor, the theoretical strain curve of the composite sensor is obtained. The acceleration calibration parameters are set through the acceleration parameter control system, including the vibration of the second servo motor... The vibration frequency, amplitude, and duration parameters are used to obtain the theoretical acceleration curve of the composite sensor through the calibration parameters of the second servo motor. Acceleration calibration parameters are set through the acceleration parameter control system, including the vibration frequency, amplitude, and duration parameters of the acceleration servo motor. The theoretical acceleration curve of the composite sensor can then be obtained through these calibration parameters. Strain calibration is performed by comparing the measured strain curve of the composite sensor with the theoretical strain curve, and acceleration calibration is performed by comparing the measured acceleration curve of the composite sensor with the theoretical acceleration curve, thereby completing the calibration of the composite sensor's performance.

[0048] It should be noted that the method of using the strain-acceleration composite sensor performance calibration device in this embodiment two is used for the use of the strain-acceleration composite sensor performance calibration device described in embodiment one. Therefore, the performance principle of the strain-acceleration composite sensor performance calibration device will not be described in detail here, and the undescribed parts can be referred to embodiment one.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A strain-acceleration composite sensor performance calibration device, characterized by, The strain-acceleration composite sensor performance calibration device comprises: a calibration support bottom plate parallel to the horizontal ground; a strain calibration device on the calibration support bottom plate, the strain calibration device comprising a strain fixed component and a strain movable component, the strain fixed component being fixedly connected with the calibration support bottom plate, and the strain movable component being slidably connected with the calibration support bottom plate; a composite sensor being fixed between the strain fixed component and the strain movable component; an acceleration calibration device on the calibration support bottom plate, the acceleration calibration device comprising a vibration component and an acceleration fixed component, the acceleration fixed component being located on one side of the composite sensor, one end of the vibration component being fixedly connected with the acceleration fixed component, and the other end of the vibration component being oppositely arranged with the composite sensor.

2. The strain-acceleration compound sensor performance calibration device according to claim 1, characterized in that: The strain-acceleration composite sensor performance calibration device further comprises a data acquisition and analysis device, the data acquisition and analysis device comprising a strain acquisition instrument and an acceleration acquisition instrument; one output end of the composite sensor being electrically connected with the strain acquisition instrument through the strain movable component; the other output end of the composite sensor being electrically connected with the acceleration acquisition instrument through the acceleration fixed component.

3. The strain-acceleration composite sensor performance calibration device of claim 2, wherein, The strain fixed component comprises: a strain fixed platform fixedly connected with the calibration support bottom plate; two first servo motors, the fixed ends of the two first servo motors being respectively fixedly connected with the strain fixed platform; the first first servo motor being located below the second first servo motor; a strain parameter control system on the strain fixed platform; the strain parameter control system being electrically connected with the two first servo motors respectively; two moving screws, the two moving screws being correspondingly arranged with the two first servo motors, the fixed end of each moving screw being fixedly connected with the working end of the corresponding first servo motor; four fast moving guide rails, the four fast moving guide rails being respectively arranged on the periphery of the two moving screws and being parallel to each other, one end of each fast moving guide rail being fixedly connected with the strain fixed platform.

4. The strain-acceleration composite sensor performance calibration device of claim 3, wherein, The strain movable component comprises: a moving test module, four slide holes being formed in the moving test module, the four slide holes being correspondingly arranged with the four fast moving guide rails; two connecting holes being further formed in the moving test module, the two connecting holes being correspondingly arranged with the two moving screws, each moving screw being adapted to the corresponding connecting hole, and the moving end of each moving screw being movably connected with the moving test module through the corresponding connecting hole; four limiters, the four limiters being correspondingly arranged with the four fast moving guide rails, the other end of each fast moving guide rail being fixedly connected with the corresponding limiter through the corresponding slide hole, and each fast moving guide rail being slidably connected with the moving test module; Two groups of sliding assemblies are arranged at the lower part of the mobile test module, and each group of the sliding assemblies comprises two sliding wheels, each of which is slidably connected with the mobile test module; A strain signal collector is arranged in the mobile test module, and an input end of the strain signal collector is electrically connected with an output end of the composite sensor; A strain data collection connector is arranged on the mobile test module, an input end of the strain data collection connector is electrically connected with an output end of the strain signal collector, and an output end of the strain data collection connector is electrically connected with the strain data collector.

5. The strain-acceleration compound sensor performance calibration device of claim 4, wherein, The strain-acceleration composite sensor performance calibration device further comprises: Two clamp connecting plates, one end of one of the clamp connecting plates is fixedly connected with the strain fixing platform between the two first servo motors, and one end of the other clamp connecting plate is fixedly connected with the mobile test module; Two sensor positioning clamps are arranged between the two clamp connecting plates, and the composite sensor is arranged between the two sensor positioning clamps.

6. The strain-acceleration composite sensor performance calibration device of claim 5, wherein, Each of the sensor positioning clamps comprises: Two clamp bodies, each of which is in a semicircular structure, two fixing holes are formed at one end of each of the clamp bodies, and an adjusting hole is formed in the middle of each of the clamp bodies; Two fixed screws are arranged in the two fixing holes one by one; An adjusting screw is arranged, one end of the adjusting screw is sequentially arranged through the adjusting holes of the two clamp bodies and is detachably fixed with the two clamp bodies, so that the composite sensor can be detachably fixed between the other ends of the two clamp bodies. Each of the other ends of the clamp connecting plates is located between the two clamp bodies of the corresponding sensor positioning clamp, two threaded holes are formed at the other end of each of the clamp connecting plates, the two threaded holes are arranged in the two fixing holes one by one, and each of the fixed screws is sequentially arranged through the corresponding fixing hole of one of the clamp bodies, the two threaded holes and the corresponding fixing hole of the other clamp body and is detachably fixed with the clamp connecting plate.

7. The strain-acceleration compound sensor performance calibration device of claim 6, wherein, The vibration assembly comprises: A second servo motor; A wide-frequency vibration screw, a fixed end of the wide-frequency vibration screw is fixedly connected with an operating end of the second servo motor, and a moving end of the wide-frequency vibration screw is arranged opposite to the composite sensor.

8. The strain-acceleration compound sensor performance calibration device of claim 7, wherein, The acceleration fixing assembly comprises: An acceleration fixing platform is arranged on one side of the composite sensor; and a fixed end of the second servo motor is fixedly connected with the acceleration fixing platform. An acceleration parameter control system is located on the acceleration fixed platform and electrically connected with the second servo motor; A vibration signal collector is located in the strain fixed platform and has an input end electrically connected with another output end of the composite sensor; An acceleration signal transmission pipe has one end connected with an output end of the vibration signal collector; An acceleration data acquisition connector has an input end connected with the acceleration signal transmission pipe and an output end electrically connected with the acceleration acquisition instrument.

9. The strain-acceleration compound sensor performance calibration device of claim 8, wherein, The data acquisition and analysis device further comprises: A strain analysis system electrically connected with the strain acquisition instrument; An acceleration analysis system electrically connected with the acceleration acquisition instrument.

10. A method of using a strain-acceleration composite sensor performance calibration device for a strain-acceleration composite sensor performance calibration device as claimed in claim 9, characterized in that, The use method comprises: installing the strain-acceleration composite sensor performance calibration device; fixing the composite sensor on the two sensor positioning clamps, calibrating the initial parameters of the strain parameter control system and the acceleration parameter control system; inputting strain calibration parameters in the strain parameter control system to control the rotation of the two first servo motors, so that the moving screw rotates and drives the moving test module to move away from the strain fixed platform, at the same time, the strain electric signal in the composite sensor is collected through the strain signal collector, the strain electric signal is transmitted to the strain acquisition instrument through the strain data acquisition connector, the strain acquisition instrument converts the strain electric signal into a strain signal and transmits it to the strain analysis system to obtain the actual strain curve of the composite sensor; inputting acceleration calibration parameters in the acceleration parameter control system to control the operation of the second servo motor, the second servo motor controls the wide-frequency vibration screw to perform the pre-set regular reciprocating action to make the composite sensor vibrate, at the same time, the vibration electric signal in the composite sensor is collected through the vibration signal collector, the vibration electric signal is transmitted to the acceleration data acquisition connector through the acceleration data transmission pipe, and then to the acceleration acquisition instrument, the acceleration acquisition instrument converts the vibration electric signal into an acceleration signal and transmits it to the acceleration analysis system to obtain the actual acceleration curve of the composite sensor; the theoretical strain curve and the theoretical acceleration curve of the composite sensor are obtained through the theoretical analysis of the strain parameter control system and the acceleration parameter control system, respectively; the theoretical and actual strain curves and acceleration curves of the composite sensor are compared to calibrate the strain and acceleration test performance of the composite sensor.

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