CN216746570U - Micro-force sensor calibration device - Google Patents
Micro-force sensor calibration device Download PDFInfo
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- CN216746570U CN216746570U CN202123117879.2U CN202123117879U CN216746570U CN 216746570 U CN216746570 U CN 216746570U CN 202123117879 U CN202123117879 U CN 202123117879U CN 216746570 U CN216746570 U CN 216746570U
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Abstract
The invention relates to a micro-force sensor calibration device, which comprises an upper shell, a lower shell, a pressure plate and a force application piece, wherein the force application piece is used for applying pressure to the pressure plate; a placing groove is formed in the middle of the upper side face of the lower shell, a replaceable module for mounting a pressure sensor is inserted into the placing groove, and the pressure sensor outputs a generated signal to an acquisition card through a wire for data acquisition; the device has the advantages of simple structure, small volume, light weight, environment-friendly material and easy maintenance, can replace the contact and the replaceable module according to different shapes and different working states of the sensor, and can be widely applied to the calibration of different pressure sensors.
Description
Technical Field
The utility model relates to a little force transducer calibration device.
Background
The micro-force sensor is a device or a device which can sense a micro-pressure signal and convert the pressure signal into a usable output electric signal according to a certain rule, and is widely applied to various industries such as intelligent medical treatment, water conservancy and hydropower, aerospace and the like.
And (3) calibrating the micro-force sensor, namely establishing a relation between the force with the standard size input into the sensor and the output electric signal through a calibration experiment, and obtaining a certain regular characteristic of the force sensor by processing acquired data such as error elimination, fitting and the like. The static characteristic of the pressure sensor refers to the correlation between the output quantity and the input quantity generated by the sensor when the sensor is subjected to a static input pressure signal, wherein the input quantity and the output quantity of the pressure sensor are independent of time. And the dynamic characteristic of the sensor refers to the output characteristic of the pressure sensor when the input pressure signal varies. The static behavior of the pressure sensor can be equated with the dynamic behavior, assuming the sensor natural frequency is extremely large and is not damped by itself. However, as the measured pressure varies over time, the response signals of the various sensors to changes in input pressure may be significantly different from those of the static calibration. Therefore, when a manufacturer only provides a static calibration result of the sensor, the requirement of dynamic measurement of the sensor can not be met obviously, and therefore, the dynamic calibration of the micro-force sensor is very important.
In addition, when the micro-force sensor is calibrated (namely the measurement accuracy of the sensor is determined), the accuracy requirement of the calibration device is higher than the accuracy of the measured micro-force sensor by one order of magnitude, so that an ideal and reliable calibration result can be obtained. Therefore, for the pressure applied by the micro-force sensor calibration device to the sensor, the error between the pressure applied by the micro-force sensor calibration device and the actual pressure applied by the sensor needs to be reduced as much as possible through a mechanical structure or error compensation.
Currently, the calibration of the pressure sensor mainly adopts a piston type pressure gauge to calibrate the pressure sensor. But the piston type pressure gauge has the defects of low rotating speed, large and heavy machine and difficult operation; the exhaust is discontinuous, and airflow pulsation is easy to cause; the operation has larger vibration, which is easy to generate interference to the calibration sensor of the sensor.
Disclosure of Invention
The utility model aims at above weak point, provide a little force transducer calibration device.
The utility model provides a scheme that technical problem was adopted is, a little force transducer calibration device, including upper housing, lower casing, clamp plate, be used for exerting the application of force spare of pressure to the clamp plate, the clamp plate suit is in upper end of upper housing and rather than the sliding fit in the vertical, and clamp plate downside middle part is provided with the depression bar, is provided with the guiding hole that supplies the depression bar to run through on the lower casing, the contact head is installed to the depression bar lower extreme, and the contact head is detachable with the depression bar;
the middle part of the upper side surface of the lower shell is provided with a placing groove, the placing groove is inserted with a replaceable module, the middle part of the upper side surface of the replaceable module is provided with a groove or a bulge for mounting a pressure sensor, and the pressure sensor outputs a generated signal to an acquisition card through a wire for data acquisition;
the force application piece applies pressure to the pressure plate so that the pressure rod applies pressure to the pressure sensor through the contact head.
Further, the contact head includes point contact head, line contact head, face contact head, and the point contact head is the back taper, and the lower extreme is provided with the point and touches the face, and the line contact head is the triangle post type, and line contact head side forms the line and touches the face, and the face contact head is the semicircle post type, and the circular arc face of semicircle post type is down, forms and touches the face.
Further, the upper shell and the lower shell are connected through bolts.
Furthermore, a retainer is vertically arranged at the upper end of the upper shell, the pressing plate is a rectangular plate, and the retainer is provided with four corners which are respectively positioned on the pressing plate to limit and guide the pressing plate.
Further, the force application part is a servo motor and a lead screw, the servo motor is installed in an inner cavity of the bottom of the lower shell, the servo motors are vertically arranged in four directions and are respectively located under four corners of the pressing plate, threaded holes are vertically formed in the four corners of the pressing plate, the lead screw matched with the lead screw is installed in each threaded hole, the lower end of the lead screw penetrates through the upper shell and the lower shell and then is connected with an output shaft of the corresponding servo motor through a coupling, and the upper end of the lead screw is installed on the upper shell through a bearing seat.
Further, inferior valve one side install with display screen, control panel is last to be provided with reset button, pressurization button, decompression button, pressure sensor, display screen, servo motor all with control panel electric connection, the display screen is used for showing real-time pressure size of exerting, the pressurization button makes the clamp plate decline increase through servo motor and exerts pressure, decompression button makes the clamp plate rise through servo motor and reduces and exert pressure.
Compared with the prior art, the utility model discloses following beneficial effect has: the pressure sensor has the advantages of simple structure, small volume, light weight, environment-friendly materials and easy maintenance, can replace the contact and the replaceable module according to different shapes and different working states of the sensor, and can be widely applied to calibration of different pressure sensors.
Drawings
The following describes the present invention with reference to the accompanying drawings.
Fig. 1 is a first schematic structural diagram of the present apparatus.
Fig. 2 is a schematic diagram of a second embodiment of the apparatus.
In the figure: 1-a lower shell; 2-an upper shell; 3-counter sink; 4-a cage; 5, pressing a plate; 6-a pressure lever; 7-contact head; 8-a replaceable module; 9-a servo motor; 10-a coupler; 11-a screw rod; 12-a bearing seat; 13-a groove; 14-a display screen; 15-control panel; 16-a reset button; 17-a pressure button; 18-decompression button.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-2, a micro-force sensor calibration device comprises an upper shell 2, a lower shell 1, a pressure plate and a force application member for applying pressure to the pressure plate 5, wherein the pressure plate is sleeved at the upper end of the upper shell and is in sliding fit with the upper end in the vertical direction, a pressure rod 6 is arranged in the middle of the lower side surface of the pressure plate, a guide hole for the pressure rod to penetrate through is arranged on the lower shell, a contact head 7 is arranged at the lower end of the pressure rod, and the contact head is detachably connected with the pressure rod;
a placing groove is formed in the middle of the upper side face of the lower shell, a replaceable module 8 is inserted into the placing groove, a groove 13 or a bulge for mounting a pressure sensor is formed in the middle of the upper side face of the replaceable module, and the pressure sensor outputs a generated signal to a collecting card through a lead for data collection; the grooves or the bulges on the replaceable modules are different to deal with different working conditions, and the shapes of the grooves and the bulges can be replaced as required in order to ensure that the sensor can be tightly attached to the bottom of the groove or the bulge structure, and the shapes include but are not limited to a semi-cylinder and a cuboid;
the force application part applies pressure to the pressure plate so that the pressure rod applies pressure to the pressure sensor through the contact head;
when the piezoelectric film sensor is subjected to pressure applied by the contact head, the pressure sensor outputs corresponding electric charge outwards, and a generated voltage signal is output to the acquisition card through the wiring harness for data acquisition; the output quantity of the piezoelectric sensor corresponding to the pressure applied by the weight at that time can be obtained by fitting the data with a plurality of measurements.
In this embodiment, the contact includes point contact, line contact, face contact, and the point contact is the back taper, and the lower extreme is provided with the point and touches the face, and the line contact is the triangular prism type, and line contact one side forms the line and touches the face towards, and the face contact is the semi-cylinder type, and the circular arc face of semi-cylinder type is down, forms and touches the face. The contact head can be replaced according to different working states, so that the effects of point contact, line contact and surface contact are achieved, and the sensor calibration device can be suitable for sensor calibration under different working states in response to different working conditions.
In this embodiment, go up casing, lower casing through bolted connection, easy dismounting, go up the casing and all arranged counter sink 3 with lower casing inside for imbed the bolt in order to connect upper and lower casing, in order to prevent to produce the interference to sensor calibration result because of the mutual slip of upper and lower casing.
In this embodiment, the holder 4 is vertically installed at the upper end of the upper shell, the pressing plate is a rectangular plate, and the holder is provided with four corners which are respectively located on the pressing plate to limit and guide the pressing plate, so that the calibration platform is prevented from interfering with the calibration result of the sensor due to instability.
The force application part comprises a servo motor 9 and a screw rod 11. The servo motors are arranged on a bottom plate at the bottom of an inner cavity at the bottom of the lower shell, so that the stability of two ends of the screw rod is ensured, four servo motors are vertically arranged without offsetting in the rotating process and are respectively positioned under four corners of the pressing plate, threaded holes are vertically formed in the four corners of the pressing plate, a screw rod in threaded fit with each threaded hole is arranged in each threaded hole 513, the lower end of each screw rod penetrates through the upper shell and the lower shell and is connected with an output shaft of the corresponding servo motor through a coupler 10, and the upper end of each screw rod is arranged on the upper shell through a bearing seat 12; adopt four ball screw structures to exert pressure to the sensor, keep the effort vertical downwards when making its clamp plate exert pressure, also can prevent simultaneously that the depression bar from taking place the slope when receiving great pressure and leading to the actual pressure exerted and the inconsistent condition of pressure that the sensor receives to appear, have accurate, easily controlled advantage.
Force application part is servo motor, during the lead screw, inferior valve one side install with display screen 14, control panel 15, control panel is last to be provided with reset button 16, pressurization button 17, decompression button 18, a pressure sensor, a display screen, servo motor all with control panel electric connection, the display screen is used for showing real-time pressure magnitude of exerting, pressurization button makes the clamp plate descend through servo motor and increases the application pressure, decompression button makes the clamp plate rise through servo motor and reduces the application pressure, can set up the initial position of clamp plate wantonly and make the clamp plate restore the position through reset button driving motor.
If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A micro-force sensor calibration device is characterized in that: the pressing plate is sleeved at the upper end of the upper shell and is in vertical sliding fit with the upper shell, a pressing rod is arranged in the middle of the lower side surface of the pressing plate, a guide hole for the pressing rod to penetrate through is formed in the lower shell, a contact head is mounted at the lower end of the pressing rod, and the contact head is detachably connected with the pressing rod;
the middle part of the upper side surface of the lower shell is provided with a placing groove, the placing groove is inserted with a replaceable module, the middle part of the upper side surface of the replaceable module is provided with a groove or a bulge for mounting a pressure sensor, and the pressure sensor outputs a generated signal to an acquisition card through a wire for data acquisition;
the force application piece applies pressure to the pressure plate so that the pressure rod applies pressure to the pressure sensor through the contact head.
2. The micro-force sensor calibration device according to claim 1, wherein: the contact head includes point contact head, line contact head, face contact head, and the point contact head is the back taper, and the lower extreme is provided with the point face of touching, and the line contact head is the triangle post type, and line contact head side orientation forms the line face of touching, and the face contact head is the semicircle post type, and the circular arc face of semicircle post type is downward, forms the face of touching.
3. The micro-force sensor calibration device according to claim 1, wherein: the upper shell and the lower shell are connected through bolts.
4. The micro-force sensor calibration device according to claim 1, wherein: the upper end of the upper shell is vertically provided with a retainer, the pressing plate is a rectangular plate, and the retainer is provided with four corners which are respectively positioned on the pressing plate to limit and guide the pressing plate.
5. The micro-force sensor calibration device according to any of the claim 1, characterized in that: the force application part is a servo motor and a screw rod, the servo motor is installed in an inner cavity at the bottom of the lower shell, the pressing plate is in threaded fit with the screw rod, the lower end of the screw rod penetrates through the upper shell and the lower shell and then is connected with an output shaft of the servo motor through a coupler, and the upper end of the screw rod is installed on the upper shell through a bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117879.2U CN216746570U (en) | 2021-12-13 | 2021-12-13 | Micro-force sensor calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117879.2U CN216746570U (en) | 2021-12-13 | 2021-12-13 | Micro-force sensor calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216746570U true CN216746570U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123117879.2U Active CN216746570U (en) | 2021-12-13 | 2021-12-13 | Micro-force sensor calibration device |
Country Status (1)
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|---|---|
| CN (1) | CN216746570U (en) |
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2021
- 2021-12-13 CN CN202123117879.2U patent/CN216746570U/en active Active
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Effective date of registration: 20230228 Address after: Room 501-5, Floor 5, Building 14, Phase I, Innovation Park, No. 3, Keji East Road, High-tech Zone, Fuzhou, Fujian 350100 Patentee after: Fujian Luochuang Medical Technology Co.,Ltd. Address before: 350100 Room 501, Floor 5, Building 14, Phase I, "Haixi High-tech Industrial Park", High-tech Zone, Fuzhou City, Fujian Province (located at No. 3, Keji East Road, Shangjie Town, Minhou County) Patentee before: Unnamed (Fujian) Investment Group Co.,Ltd. Effective date of registration: 20230228 Address after: 350100 Room 501, Floor 5, Building 14, Phase I, "Haixi High-tech Industrial Park", High-tech Zone, Fuzhou City, Fujian Province (located at No. 3, Keji East Road, Shangjie Town, Minhou County) Patentee after: Unnamed (Fujian) Investment Group Co.,Ltd. Address before: Fuzhou University, No.2, wulongjiang North Avenue, Fuzhou University Town, Minhou County, Fuzhou City, Fujian Province Patentee before: FUZHOU University |