CN219178803U - Portable multidimensional force calibration device for laboratory and field - Google Patents

Portable multidimensional force calibration device for laboratory and field Download PDF

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Publication number
CN219178803U
CN219178803U CN202223179035.5U CN202223179035U CN219178803U CN 219178803 U CN219178803 U CN 219178803U CN 202223179035 U CN202223179035 U CN 202223179035U CN 219178803 U CN219178803 U CN 219178803U
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force
calibration
loading
standard
laboratory
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倪博
翁俊
任黎丽
黄淑毅
毛志勇
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SHANGHAI PRECISION METROLOGY AND TEST RESEARCH INSTITUTE
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SHANGHAI PRECISION METROLOGY AND TEST RESEARCH INSTITUTE
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    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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Abstract

The utility model discloses a portable multi-dimensional force calibration device for both laboratory and field use, which comprises: the device comprises a calibration tool, a loading mechanism and a standard force measuring unit; the calibration tool can be used for installing, fixing and supporting the whole loading mechanism, is structurally connected with the test bed supporting platform, and ensures that the loading mechanism can correctly apply standard force values and standard moment along the loading axis of the calibrated multidimensional force sensor; the loading mechanism comprises: a transmission mechanism and an integrated servo motor control system; the transmission mechanism adopts a worm gear screw lifter with a large transmission ratio to transmit loading force and moment; the integrated servo motor control system integrates a servo motor, an encoder and a controller, has small overall volume and light weight, and is suitable for on-site calibration; the standard force measuring unit obtains real-time data of the loading force through calibration software, the real-time data are fed back to the controller, and the controller controls the current of the servo motor to accurately control the loading force.

Description

Portable multidimensional force calibration device for laboratory and field
Technical Field
The utility model relates to the technical field of multi-component force sensor calibration, in particular to a portable multi-dimensional force calibration device for both a laboratory and a field.
Background
For experiments such as docking collision force, satellite disturbance force, orbital transfer engine thrust, solid engine vector thrust and the like of a docking mechanism in the aerospace field, accurate measurement is required for the magnitude, direction and action point of force, and as a conventional unidirectional force sensor can only measure the magnitude of force in a determined direction, the requirement of measuring multidimensional force cannot be met, and therefore the multidimensional force sensor is required to be used for measuring multidimensional force information. The measurement data of the multidimensional force sensor plays an important role on test results, so that parameter correction before the sensor is used and periodic calibration in use are required to be carried out in situ so as to ensure that the technical performance of the multidimensional force sensor meets the requirements of model tests.
The sensor is applied to a comprehensive test system of a docking mechanism for measuring docking collision force, a special multi-dimensional force sensor suitable for the structural size and the measurement range of the test system is adopted, and a special field calibration device is required to be customized for field in-situ calibration of the multi-dimensional force sensor and is used for loading standard force/moment to the multi-dimensional force sensor. Because the model tasks of the integrated test system of the docking mechanism are frequent, the reserved calibration time window is shorter, the independent parameter calibration of the sensor is required in a laboratory according to the calibration requirement, and then the parameter correction of the in-situ operation is required once, the multi-dimensional force sensor is required to be calibrated quickly in a short time, and therefore, the universal portable multi-dimensional force calibration device which has wide measuring range, high loading control precision, high loading efficiency, strong applicability and convenient quick assembly and disassembly and is suitable for the laboratory and the in-situ calibration is required to be developed.
Disclosure of Invention
The utility model aims to provide a portable multi-dimensional force calibration device for laboratory and field use, which has the advantages of wider measurement range, higher force loading accuracy, smaller volume and convenient installation and disassembly, and can calibrate independent parameters and coupling error parameters in the laboratory after a multi-dimensional force sensor is disassembled from an application scene and can calibrate in-situ in the field environment (namely, the multi-dimensional force sensor is installed on a test system). In addition, the device has popularization, and the corresponding structural framework can be designed to be applied to field calibration of different six-component force sensors.
In order to achieve the above object, the present utility model provides a portable multi-dimensional force calibration device for both laboratory and field use, comprising: the device comprises a calibration tool, a loading mechanism and a standard force measuring unit;
the calibration tool can be used for installing, fixing and supporting the whole loading mechanism, is structurally connected with the test bed supporting platform, and ensures that the loading mechanism can correctly apply standard force values and standard moment along the loading axis of the calibrated multidimensional force sensor, thereby realizing the on-site calibration of the multidimensional force sensor;
the loading mechanism includes: a transmission mechanism and an integrated servo motor control system; the transmission mechanism adopts a worm and gear spiral lifter with a large transmission ratio to carry out the transmission of loading force and moment; the integrated servo motor control system integrates a servo motor, an encoder and a controller, has small overall volume and light weight, and is suitable for on-site calibration; the integrated servo motor control system is connected with the upper computer through a bus, and the motor is controlled to drive the worm to rotate through the calibration software, so that the worm wheel is driven to enable the spiral lifter to translate, and the force/moment load is stably applied to the multidimensional force sensor;
the standard force measuring unit obtains real-time data of the loading force through the calibration software and feeds the real-time data back to the controller, and the controller controls the current of the servo motor to realize accurate control of the loading force, so that the on-site in-situ calibration of the sensor is realized.
According to the portable multi-dimensional force calibration device for both the laboratory and the field, the calibration tool realizes accurate loading of moments around three axes by designing the loading stations parallel to the coordinate axes.
Above-mentioned dual-purpose portable multidimensional force calibrating device in laboratory and scene, wherein, the loading frock of every direction all can be independently installed and dismantled, and on-the-spot installation or when dismantling need not to accomplish fast with the help of hoisting mechanism, can reduce the required time of calibration in a large number.
Above-mentioned dual-purpose portable multidimensional force calibrating device in laboratory and scene, wherein, calibration frock includes: the device comprises a supporting rod, a loading plate, a stress tool and an adapter plate; and the positioning tool of the calibration tool is arranged on the adapter plate.
Above-mentioned dual-purpose portable multidimensional force calibrating device in laboratory and scene, wherein, atress frock includes: the ball seat and the positioning plate ensure that the force is transmitted as point stress transmission in a ball seat form of ball point contact; the positioning plate can realize accurate positioning of a force bearing position in moment on-site calibration, and the force bearing ball seat is arranged on the positioning plate to form a force bearing tool for moment calibration, so that standard force parallel to a mechanical coordinate axis of the sensor for a specific distance can be applied to the multidimensional force sensor, and on-site calibration of moment parameters of the multidimensional force sensor around a designated axis is realized.
Above-mentioned portable multidimensional force calibrating device of laboratory and on-the-spot dual-purpose, wherein, the bracing piece that adopts four foot structures is installed respectively to being proofreaded on multidimensional force sensor's the installation base for fixed calibration frock's loading board, then install four bracing pieces with the loading board on, after preliminary determining the mounting panel position, use the fixed loading board of double nut, finally install loading mechanism on the loading board.
According to the portable multi-dimensional force calibration device for both the laboratory and the field, the loading mechanism adopts a mechanical structure to realize safe and stable force application to the multi-dimensional force sensor, the worm gear screw lifter is used as a transmission mechanism, the integrated servo motor control system is used as a driving mechanism to realize loading driving and control of loading force, and finally standard force/moment is applied to the calibrated sensor.
According to the portable multi-dimensional force calibration device for both a laboratory and a field, the integrated servo motor control system is provided with the high-resolution analog signal data acquisition channel and the photoelectric encoder digital signal measurement channel, and the motor rotating speed is subjected to feedback control to realize accurate control on the loading speed, so that the standard force is stably applied to the multi-dimensional force sensor.
The portable multi-dimensional force calibration device for both laboratory and field use, wherein the standard force measurement unit comprises: standard force transducer, signal conditioning unit, data acquisition unit, host computer.
According to the portable multi-dimensional force calibration device for both the laboratory and the field, the standard force sensor is connected with the loading mechanism through the sensor connecting sleeve, the standard force value is received during loading in real time, the signal conditioning unit converts the strain signal of the standard force sensor into the standard voltage signal, the data acquisition unit acquires the voltage signal, and the voltage signal is analyzed and processed through the upper computer and the calibration software to obtain the corresponding calibration value.
The portable multidimensional force calibration device has the technical scheme that:
(1) The calibration device consists of a calibration tool, a loading mechanism and a standard force measuring unit.
(2) Through developing the calibration frock that suits with the multidimensional force sensor, ensure that loading mechanism can be along the correct standard force of exerting of each coordinate axis of multidimensional force sensor of being proofread and correct to realize on-the-spot calibration. Accurate loading of moments about three axes is achieved by designing the loading station parallel to the coordinate axes.
(3) The calibration tool consists of a supporting rod, a loading plate, a stress tool and the like, the loading tool in each direction can be independently installed and detached, and the on-site installation or the on-site detachment can be completed quickly without a lifting mechanism, so that the time required for calibration is greatly shortened.
(4) The loading mechanism consists of a transmission mechanism and an integrated servo motor control system. The transmission mechanism adopts a worm gear screw lifter with a large transmission ratio to transmit loading force and moment, and the integrated servo motor control system integrates a servo motor, an encoder and a controller, so that the whole size is small, the weight is light, and the device is suitable for on-site calibration. The control system is connected with the upper computer through a bus, and the motor is controlled to drive the worm to rotate through the calibration software, so that the worm wheel is driven to translate the spiral lifter, and the force/moment load is stably applied to the multidimensional force sensor.
(5) The standard force measuring unit comprises a standard force sensor, a signal conditioning unit, a data acquisition unit and an upper computer, real-time data of loading force is obtained through calibration software and fed back to the controller, and the controller controls current of the servo motor to accurately control the loading force, so that on-site in-situ calibration of the sensor is realized.
Compared with the prior art, the utility model has the technical advantages that:
the portable multidimensional force calibration device adopts a scheme based on a worm gear screw elevator and an integrated servo motor control system to form a loading mechanism, so that the standard force of the multidimensional force sensor is accurately and stably loaded. The worm gear screw elevator has the advantages of large transmission ratio, stable loading, self-locking of back stroke and the like, and the integrated servo motor control system has the advantages of small volume, light weight, portability, convenient control and the like.
The portable multidimensional force calibration device has the characteristics of dual purposes of a laboratory and a field, and can change the structure of a calibration tool according to the actual field requirement so as to adapt to the calibration of multidimensional force sensors of different application scenes.
Drawings
The utility model relates to a portable multi-dimensional force calibration device for both laboratory and field use, which is provided by the following examples and attached drawings.
FIG. 1 is a block diagram of a portable multidimensional force calibration apparatus;
FIG. 2 is a block diagram of a loading mechanism;
FIG. 3 is a block diagram of a standard force measurement unit;
FIG. 4 is a design of a force tee;
FIG. 5 is a layout of a locating plate seat;
FIG. 6 is a main direction load plate design and load mechanism mounting interface schematic;
FIG. 7 is a schematic side load plate view;
FIG. 8 is a side load plate design and load mechanism mounting interface schematic;
FIG. 9 is a block diagram of a multi-dimensional force sensor;
FIG. 10 is a schematic diagram of an interposer design;
FIG. 11 is an overall schematic cross-sectional view of a portable multi-dimensional calibration apparatus (for field calibration);
FIG. 12 is an overall schematic of a portable multi-dimensional calibration device (for field calibration);
fig. 13 is a schematic diagram of a portable multidimensional calibration apparatus laboratory calibration overall.
In FIGS. 11 and 12, 1-main direction loading plate, 2-positioning plate seat, 3-supporting rod, 4-force ball seat, 5-main direction cushion block, 6-force ball seat cover, 7-sensor connecting sleeve (main direction), 8-adapter plate, 9-lateral supporting plate, 10-lateral supporting rod, 11-lateral supporting rod, 12-lateral loading plate, 13-sensor connecting sleeve (lateral direction), 14-sensor pressure head, 15-standard force sensor (main direction), 16-worm screw lifter, 17-lateral standard force sensor (lateral direction), 18-force ball seat steel ball, 19-24-screw, 25-test system flange plate, 26-multidimensional force sensor
In FIG. 13, the a-X/Y direction loading mechanism, the b-X/Y direction standard force sensor, the c-Z direction loading mechanism, the d-Z direction standard force sensor, the e-Z direction loading plate, the f-main direction loading plate, the g-main direction supporting rod, the h-side loading plate, the i-side supporting rod, the j-stress tool and the k-adapter plate.
Detailed Description
A portable multi-dimensional force calibration device for both laboratory and field use in accordance with the present utility model is described in further detail below.
Because the integrated test system of the docking mechanism has a complex structure, the requirement on the installation and positioning precision of the high-precision multidimensional force sensor of key equipment for measuring multidimensional force is very high, and the complete and reliable in-situ calibration on site is difficult to realize by adopting a traditional measuring method.
The utility model adopts a comparison method calibration principle, and uses a specially developed loading mechanism to apply linear independent standard force/moment on the standard force sensor and the calibrated multidimensional force sensor in a certain loading mode, and calculates the indication error of the multidimensional force sensor according to the functional relation between the output magnitude value of each channel of the multidimensional force sensor and the standard force/moment, thereby completing the on-site in-situ calibration. Meanwhile, the calibration device can form a multi-dimensional force calibration device for a laboratory in the laboratory after being reassembled, so that independent calibration of the multi-dimensional force sensor laboratory is realized.
The loading mechanism consists of a transmission mechanism and a driving mechanism. FIG. 2 is a block diagram of a loading mechanism. The loading mechanism adopts a mechanical structure to realize safe and stable stress application to the multidimensional force sensor. The worm gear spiral lifter is used as a transmission mechanism, the integrated servo motor control system is used as a driving mechanism to realize control of loading driving and loading force, and finally standard force/moment is applied to the calibrated sensor.
The worm gear transmission has the advantages of compact structure, good rigidity, small deformation, stable transmission, large transmission ratio and capability of easily loading force; the most important point is that self-locking can be carried out, namely, any force value point in the measuring range can be remained. The defects of complex hydraulic servo structure, high energy consumption and high maintenance cost and the defect of poor positioning accuracy of the air cylinder are avoided.
The driving mechanism adopts an integrated servo motor control system based on DSP (digital Signal processor) full-digital closed-loop control to realize loading and accurate control of standard force. The integrated servo motor control system is provided with a high-resolution analog signal data acquisition channel and a photoelectric encoder digital signal measurement channel, and the motor rotating speed is subjected to feedback control to realize accurate control on the loading speed, so that the standard force is stably applied to the multidimensional force sensor.
The standard force measuring unit is composed of a standard force sensor, a signal conditioning unit and a data acquisition unit, wherein the upper computer is connected with the loading mechanism through a sensor connecting sleeve, the standard force sensor receives a standard force value when being loaded in real time, the signal conditioning unit converts a strain signal of the standard force sensor into a standard voltage signal, the data acquisition unit acquires the voltage signal, and the voltage signal is analyzed and processed through the upper computer and calibration software according to a corresponding formula algorithm to obtain a corresponding calibration value.
Aiming at the actual installation state and structural characteristics of the multidimensional force sensor for the test system, a matched calibration tool is developed as a device according to the characteristics of the sensor and the on-site calibration operation space. The calibration tool has the main effects of installing, fixing and supporting the whole loading mechanism, and being structurally connected with a supporting platform of a test bed, and ensuring that the loading mechanism can correctly apply standard force values and standard moment along a loading axis of the calibrated multidimensional force sensor, thereby realizing the on-site calibration of the multidimensional force sensor.
The calibration tool consists of a supporting rod, a loading plate, a stress tool, an adapter plate and the like.
The stress tool consists of a ball seat and a positioning plate. The ball seat form of ball point contact is designed to ensure that force is transmitted as point stress, and the measuring precision is greatly improved compared with the surface stress. The design of the forced ball seat is shown in figure 4.
The positioning plate has the function of realizing accurate positioning of a force bearing position in the moment on-site calibration, and the force bearing ball seat is arranged on the positioning plate to form a force bearing tool for moment calibration, so that standard force parallel to a specific distance (namely a fixed force arm of moment) of a mechanical coordinate axis of the sensor can be applied to the multi-dimensional force sensor, and the on-site calibration of moment parameters of the multi-dimensional force sensor around a designated axis is realized. The design of the locating plate is shown in figure 5.
Because of the limitation of the site space position, the support rods with a four-leg structure are respectively arranged on the installation base of the calibrated multidimensional force sensor and used for fixing the loading plate of the calibration tool, then the loading plate is arranged on the four support rods, and after the position of the installation plate is preliminarily determined, the loading plate is fixed by using double nuts. And finally, installing a loading mechanism on the loading plate. The whole process is simple and convenient, and quick installation and disassembly can be realized.
Fig. 6 shows a main direction loading plate of the calibration device, which is made of stainless steel plates with the thickness of 20mm, and shows the installation positions of the loading mechanism for calibrating the Z-direction force, the installation positions of the loading mechanism for calibrating the X-direction moment (150 mm away from the center position of the mechanical coordinate axis) and the installation positions of the loading mechanism for calibrating the Y-direction moment (150 mm away from the center position of the mechanical coordinate axis), and the fixture and the loading mechanism are respectively in cantilever installation modes in the actual installation process.
FIG. 7 shows a side loading plate of a calibration device, in which the multidimensional force sensor can be directly loaded during the calibration process, lateral support rods are mounted on a mounting base of the multidimensional force sensor, through holes on the loading plate are used for positioning, the loading plate is mounted on the support rods, double nuts are used for fixing the loading plate, and then a loading mechanism is mounted on two positions on the loading plate in sequence, wherein the two positions correspond to the calibration mounting positions of X-direction force and Z-direction moment respectively; and the Y-direction tool is installed in the same way, so that the calibration installation positions of Y-direction force and Z-direction moment can be realized. The whole process is simple and convenient, and quick installation and disassembly can be realized.
FIG. 8 is a schematic diagram of a side loading plate interface, wherein the side loading plate is attached to two sides of a multidimensional force sensor to be calibrated, so that the side loading plate has two mounting positions, namely, the mounting position of a loading device during X/Y force calibration (X, Y force calibration can be realized by 90-degree mounting), and the mounting position of a loading mechanism during Z-direction moment calibration (100 mm away from the center position of a mechanical coordinate axis).
Because the Z-direction (main direction) stressed mounting surface of the calibrated multidimensional force sensor is of a hollow open-pore structure (shown in fig. 9), Z-direction force and X/Y-direction moment loading cannot be directly carried out along the mechanical coordinate axis of the sensor, and therefore, a matched adapter plate is required to be designed.
The inner side surface of the adapter plate is attached to a Z-direction stressed mounting surface of the calibrated multidimensional force sensor, the outer side surface of the adapter plate is attached to a flange plate (also a central hollowed-out open pore structure) of the test bed, and then the adapter plate is fixed with the sensor and the flange plate through eight bolts.
The positioning tool of the calibration tool is arranged on the adapter plate, and the precision retest is carried out on the ball seat through the laser tracking measurement system, so that the actual accurate position of the deviation is determined. And the loading mechanism for performing on-site calibration of Z-direction force and X/Y-direction moment is directly loaded on the ball seat of the positioning tool, so that the main direction parameter calibration of the multi-dimensional force sensor is completed.
Fig. 11 and 12 are overall schematic views for in-situ calibration of a portable multidimensional force calibration apparatus for a docking mechanism integrated test system. The multi-dimensional force sensor can be suitable for on-site calibration of the multi-dimensional force sensor for the test bed in different occasions by changing structural design changes such as the installation structure position of the loading mechanism in the loading plate.
Fig. 13 is a schematic diagram showing the whole laboratory calibration of the portable multidimensional calibration apparatus. The portable multidimensional calibration device can form the laboratory calibration device shown in fig. 13 through component assembly, can calibrate force/moment parameters of the multidimensional force sensor in two orthogonal directions simultaneously, and can calibrate coupling errors of the two direction parameters of the multidimensional force sensor. By rotating the lateral support bar and the lateral loading plate by 90 degrees, the force/moment calibration in the X direction and the Y direction can be respectively carried out. The mounting interface positions of the loading mechanisms in all directions are respectively changed, and force value calibration or moment calibration in all directions can be selectively carried out.
The on-site calibration device designed and developed by the utility model can realize small volume, light weight, compact structure, good rigidity of the calibration tool, small deformation, stable transmission of the loading mechanism, accurate control of the loading speed, no overshoot, no back stroke in the loading process, and high-precision calibration of the multidimensional force sensor in a laboratory when the worm gear screw lifter and the integrated servo control system are selected.

Claims (10)

1. A laboratory and field portable multi-dimensional force calibration device, comprising: the device comprises a calibration tool, a loading mechanism and a standard force measuring unit;
the calibration tool can be used for installing, fixing and supporting the whole loading mechanism, is structurally connected with the test bed supporting platform, and ensures that the loading mechanism can correctly apply standard force values and standard moment along the loading axis of the calibrated multidimensional force sensor, thereby realizing the on-site calibration of the multidimensional force sensor;
the loading mechanism includes: a transmission mechanism and an integrated servo motor control system; the transmission mechanism adopts a worm and gear spiral lifter with a large transmission ratio to carry out the transmission of loading force and moment; the integrated servo motor control system integrates a servo motor, an encoder and a controller, has small overall volume and light weight, and is suitable for on-site calibration; the integrated servo motor control system is connected with the upper computer through a bus, and the motor is controlled to drive the worm to rotate through the calibration software, so that the worm wheel is driven to enable the spiral lifter to translate, and the force/moment load is stably applied to the multidimensional force sensor;
the standard force measuring unit obtains real-time data of the loading force through the calibration software and feeds the real-time data back to the controller, and the controller controls the current of the servo motor to realize accurate control of the loading force, so that the on-site in-situ calibration of the sensor is realized.
2. A laboratory and field portable multidimensional force calibration apparatus as claimed in claim 1, wherein the calibration fixture is adapted to accurately load moments about three axes by designing a loading station parallel to the coordinate axes.
3. The portable multi-dimensional force calibration device for both laboratory and field use according to claim 2, wherein the loading tools in each direction can be independently assembled and disassembled, and the assembly and disassembly in the field can be completed quickly without a lifting mechanism, thereby greatly reducing the time required for calibration.
4. A laboratory and field portable multidimensional force calibration apparatus as recited in claim 3, wherein said calibration fixture comprises: the device comprises a supporting rod, a loading plate, a stress tool and an adapter plate; and the positioning tool of the calibration tool is arranged on the adapter plate.
5. The portable multi-dimensional force calibration apparatus of claim 4, wherein the force tool comprises: the ball seat and the positioning plate ensure that the force is transmitted as point stress transmission in a ball seat form of ball point contact; the positioning plate can realize accurate positioning of a force bearing position in moment on-site calibration, and the force bearing ball seat is arranged on the positioning plate to form a force bearing tool for moment calibration, so that standard force parallel to a mechanical coordinate axis of the sensor for a set distance can be applied to the multidimensional force sensor, and on-site calibration of moment parameters of the multidimensional force sensor around a designated shaft is realized.
6. The portable multi-dimensional force calibration device for both laboratory and field use according to claim 5, wherein the support rods with four-leg structure are respectively mounted on the mounting bases of the calibrated multi-dimensional force sensor for fixing the loading plate of the calibration fixture, then the loading plate is mounted on the four support rods, after the position of the mounting plate is preliminarily determined, the loading plate is fixed by using double nuts, and finally the loading mechanism is mounted on the loading plate.
7. The portable multi-dimensional force calibration device for both laboratory and field use according to claim 1, wherein the loading mechanism adopts a mechanical structure to realize safe and stable force application to the multi-dimensional force sensor, and the integrated servo motor control system is used as a driving mechanism to realize control of loading driving and loading force by using a worm gear screw lifter as a transmission mechanism, so that standard force/moment is finally applied to the calibrated sensor.
8. The portable multi-dimensional force calibration device for both laboratory and field use according to claim 7, wherein the integrated servo motor control system comprises a high-resolution analog signal data acquisition channel and a photoelectric encoder digital signal measurement channel, and the motor rotation speed is feedback controlled to realize accurate control of the loading speed, so that the standard force is stably applied to the multi-dimensional force sensor.
9. A portable multi-dimensional force calibration apparatus for both laboratory and field use as defined in claim 1, wherein said standard force measurement unit comprises: standard force transducer, signal conditioning unit, data acquisition unit, host computer.
10. The portable multi-dimensional force calibration device for both laboratory and field use according to claim 9, wherein the standard force sensor is connected with the loading mechanism through a sensor connecting sleeve, the standard force value is received during loading in real time, the signal conditioning unit converts the strain signal of the standard force sensor into a standard voltage signal, the data acquisition unit acquires the obtained voltage signal, and the corresponding calibration value is obtained through analysis and processing of an upper computer and calibration software.
CN202223179035.5U 2022-11-29 2022-11-29 Portable multidimensional force calibration device for laboratory and field Active CN219178803U (en)

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CN202223179035.5U CN219178803U (en) 2022-11-29 2022-11-29 Portable multidimensional force calibration device for laboratory and field

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Application Number Priority Date Filing Date Title
CN202223179035.5U CN219178803U (en) 2022-11-29 2022-11-29 Portable multidimensional force calibration device for laboratory and field

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CN219178803U true CN219178803U (en) 2023-06-13

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