CN105333993A - Micro-force sensor dynamic calibration system and method based on micro negative step force - Google Patents
Micro-force sensor dynamic calibration system and method based on micro negative step force Download PDFInfo
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- CN105333993A CN105333993A CN201510794365.0A CN201510794365A CN105333993A CN 105333993 A CN105333993 A CN 105333993A CN 201510794365 A CN201510794365 A CN 201510794365A CN 105333993 A CN105333993 A CN 105333993A
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- G—PHYSICS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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Abstract
The invention discloses a micro-force sensor dynamic calibration system based on micro negative step force. The system comprises a micro negative step force signal generation and regulation device, a sensor fixation and regulation device and a signal amplification and acquisition device, wherein the micro negative step force signal generation and regulation device comprises an electromagnetic emission device, a static load device and a stop device; the micro negative step force signal generation and regulation device is connected with the sensor fixation and regulation device by virtue of the static load device; the sensor fixation and regulation device is connected with the signal amplification and acquisition device by virtue of a coaxial cable; the electromagnetic emission device comprises a charging/discharging loop and an emission track; the charging/discharging loop comprises a charging voltage adjustable capacitor bank, a rectifier bridge circuit, a contact switch, a charging switch and a solenoid coil; and the solenoid coil is embedded in the emission track or is tightly wound outside the emission track. The invention also discloses a micro-force sensor dynamic calibration method based on micro negative step force.
Description
Technical field
The application relates to dynamic impulse Experimental Mechanics technical field, specifically, relates to a kind of Micro-force sensor dynamic calibration system based on small negative step force and method.
Background technology
Along with the low-dimensional materials such as fiber, film application is more and more wider, more and more urgent to the sign of its dynamic mechanical, wherein in dynamic mechanical characterizes, the dynamic calibration technology of widely used piezoelectric type Micro-force sensor is just receiving increasing concern.At present positive step force signal scaling mainly adopted to piezoelectric force transducer dynamic calibration and utilize the large class of negative step force signal scaling two.Wherein drop hammer calibration system (as: CN102401707A) using drop hammer tester as sensor excitation device, produces positive step force signal by drop hammer tester and sensor is demarcated." Air-Uplift " striking dynamic calibration system (as: Beijing Institute of Technology, Zhang Xunwen etc., " Air-Uplift " striking dynamic calibration system), based on Pneumatic immpacting principle, in conjunction with variable cross section amplification principle and MATERIALS ' DYNAMIC fracture, realize the generation of positive step force signal, realize transducer calibration as excitation.Based on the calibration system of the negative step force signal of MATERIALS ' DYNAMIC fracture, comprise as broken (as: Zhejiang University, Wei Yan is fixed, the realization of standard negative step force and measuring study thereof) and precompressed-thrust (as: Zhejiang University, Chen Hui etc., a kind of novel great force value, wide band negative step force production method) scheme, and based on wire rope quick cutting device (as: China University Of Petroleum Beijing, Liu Guangfu etc., the side force dynamic calibration of wheel force) negative step dynamic calibration system.These class methods apply static load in advance, realized the generation of negative step force signal, realize by the design of brittle failure material different size the adjustment that different size bears step force signal by material brittle failure or clipping apparatus.In above-mentioned scaling method, the system and device that drops hammer is bulky; Pneumatic immpacting subtraction unit is complicated, and noise is large; In material brittle failure method, brittle failure material is disposable design, and design is complicated, and calibration experiment cannot repeat; Wire rope fast shut-off method poor stability, repeatability are poor.In addition, above scaling method is comparatively large due to the load provided, and is difficult to the dynamic calibration realizing Micro-force sensor.
In sum, how to develop and to develop one and can accurately provide small dynamic load, simultaneously reproducible, stability is high, noise is little, high-precision piezoelectric type Micro-force sensor dynamic calibration system and technology become technical matters urgently to be resolved hurrily.
Summary of the invention
In view of this, technical problems to be solved in this application there is provided a kind of Micro-force sensor dynamic calibration system based on small negative step force and method, accurately can produce small negative step force, and reproducible, stability is high, noise is little, compact conformation, simple and practical, precision is high, can solve in MATERIALS ' DYNAMIC stretching experiment, the Micro-force sensor dynamic calibration problem especially in film or fibrous material dynamic tensile experiment.
In order to solve the problems of the technologies described above, the application has following technical scheme:
Based on a Micro-force sensor dynamic calibration system for small negative step force, it is characterized in that, comprising: small negative step force signal occurs to fix with regulating device, sensor to amplify and harvester with regulating device, signal,
Described small negative step force signal occurs comprise electromagnetic launch system, static load device with regulating device and play locking apparatus;
Described small negative step force signal occurs to be connected with regulating device by described static load device and described sensor are fixing with regulating device; Fixing amplification by concentric cable and described signal with regulating device is connected with harvester described sensor;
Described electromagnetic launch system comprises charging and discharging circuit and launching trajectory, and described charging and discharging circuit comprises charging voltage tunable capacitor group, rectifier bridge, contact switch, charge switch and solenoid; Described solenoid is embedded in described launching trajectory or is closely wrapped in outside described launching trajectory.
Preferably, wherein, described launching trajectory is the cylindrical, hollow pipeline be made up of low-friction coefficient, non-magnetic, non-conducting material, and described launching trajectory upper end outside surface makes screw thread, and lower end has the symmetrical openings for loading and unloading electromagnetism counterweight.
Preferably, wherein, described bullet locking apparatus comprises bullet and stops track, setting nut, spring, buckle, central through hole and radial direction through hole;
Described bullet stops the central through hole that orbit centre comprises the variable cross section of inner band center screw thread in the axial direction, and described launching trajectory and described bullet are stopped track and docked by the center screw thread on described central through hole; Described bullet stops track circumference symmetric design two uniform cross section through holes being with length-specific internal thread, described spring and described buckle are placed in this circumferential uniform cross section through hole, and described setting nut stops track by the internal thread of this circumferential uniform cross section through hole with described bullet and described spring is connected; Described spring and described setting nut are hinged and just connect with planar end surface one end of described buckle by spherical hinge, and the described buckle other end is the oblique section towards having a down dip.
Preferably, wherein, described bullet stops the central through hole of track is variable cross section through hole.
Preferably, wherein, described static load device comprises electromagnetism counterweight and static load fine rule, and described electromagnetism counterweight is the counterweight of the different quality same shape be made up of high-permeability material, the head design taper counterweight cap in echelon of described electromagnetism counterweight, described static load fine rule connects counterweight by counterweight cap; Described static load fine rule one end is connected to described sensor and fixes with on the installation of regulating device and setting nut, and the other end runs through bullet and stops track and described Electromagnetic Launching track, and connects described electromagnetism counterweight;
Described static load fine rule is the filament be made up of the flexible material that density is less; Before calibration experiment, described electromagnetism counterweight is connected by described static load fine rule and is suspended in described launching trajectory, and coaxial with described launching trajectory.
Preferably, wherein, during calibration experiment, the electromagnetism counterweight of described suspension is launched in described bullet locking apparatus, stuck fixing by buckle.
Preferably, wherein, described sensor is fixed to comprise with regulating device and is installed and setting nut and piezoelectric type Micro-force sensor to be calibrated, and one end of described installation and setting nut is threaded, and other end center is with wiring hole; Described installation and setting nut and described piezoelectric type Micro-force sensor to be calibrated are connected in series by screw thread; Described static load fine rule is fixedly connected on described installation and setting nut by described wiring hole.
The present invention also provides a kind of scaling method carried out based on the Micro-force sensor dynamic calibration system of small negative step force, it is characterized in that, comprising:
Before a calibration experiment: the preferably electromagnetism counterweight of appropriate mass, connects with static load fine rule and be suspended in launching trajectory, coaxial with launching trajectory; Described electromagnetism counterweight produces a downward acting force to piezoelectric type Micro-force sensor to be calibrated under gravity, and now, piezoelectric type Micro-force sensor to be calibrated produces a small and erratic positive step force signal, and this signal will decay to zero rapidly;
During a calibration experiment: preferably suitable voltage charges to charging voltage tunable capacitor group, after charging complete, contact switch is opened, and goes out under the pulse magnetic effect that electromagnetism counterweight produces at solenoid along electromagnetic rail launching, enter rapidly bullet and stop track, and stuck by buckle; Now, the gravity of the electromagnetism counterweight that piezoelectric type Micro-force sensor to be calibrated originally bore rapidly disappears, produce a small and accurate negative step force signal instantaneously, this negative step force size equals the gravity of electromagnetism counterweight, and this negative step force is on a timeline by permanent stable existence;
After a calibration experiment: bullet of outwarding winding stops the buckle that in track, setting nut connects, and electromagnetism counterweight is released;
Opening part in launching trajectory lower end changes the electromagnetism counterweight of different quality, repeats above three step calibration experiments, performs the demarcation that different size bears step force signal.
Compared with prior art, the system and method described in the application, reaches following effect:
First, because one of major defect (or feature) being applied to the piezoelectric type Micro-force sensor of kinetic measurement inevitably the static force signal be applied to it is rapidly decayed to zero, and dynamic force signal changes in time and can record for a long time.The present invention will make full use of this shortcoming (or feature), shortcoming is converted into advantage, piezoelectric type Micro-force sensor is utilized to hang an electromagnetism counterweight, the positive step force that this static force signal of the gravity of electromagnetism counterweight produces rapidly decays to zero, when the electromagnetism counterweight adopting ELECTROMAGNETIC LAUNCH TECHNOLOGY to launch this suspension straight up, what the piezoelectric type Micro-force sensor be attached thereto while electromagnetism counterweight is launched originally was subject to decay to zero positive step force signal will change rapidly accurate small negative step force signal into, and this negative step force size equals the gravity of electromagnetism counterweight, direction is contrary.Because electromagnetism counterweight is launched away bullet stop in track be stuck fixing, thus the existence that this negative step force can be stable for a long time on a timeline.Visible, the system that the present invention proposes and technology have the function accurately producing small negative step force cleverly, and simple and compact for structure, economical and practical, simple operation.
The second, due to used electromagnetism counterweight can be repeatedly stable repeatedly transmitting use, thus this Micro-force sensor dynamic calibration system based on small negative step force of the present invention and technology have the outstanding advantages that can repeat and accurately produce identical small negative step force when doing calibration experiment, thus, there is the stability of well repeatability and height, and noise is little waits outstanding advantages.
Although three, the present invention is for piezoelectric type Micro-force sensor, the dynamic calibration problem for the dynamic Micro-force sensor of other non-depressed electric-type is applicable equally.Therefore, applied widely is another advantage of this invention.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the formation schematic diagram based on the Micro-force sensor dynamic calibration system of small negative step force in the present invention;
Fig. 2 is piezoelectric type Micro-force sensor dynamic calibration experiment electrical signal data (0.9V) in the embodiment of the present invention;
Fig. 3 is voltage and dynamic load graph of relation in piezoelectric type Micro-force sensor dynamic calibration experiment in the embodiment of the present invention 2.
Embodiment
As employed some vocabulary to censure specific components in the middle of instructions and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of instructions and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and indirectly electric property coupling means at this.Therefore, if describe a first device in literary composition to be coupled to one second device, then represent described first device and directly can be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple.Instructions subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection domain of the application is when being as the criterion depending on the claims person of defining.
Embodiment 1
The composition schematic diagram of the specific embodiment for the Micro-force sensor dynamic calibration system based on small negative step force a kind of described in the application shown in Figure 1.This system comprises: small negative step force signal occurs with regulating device 30, sensor is fixing and regulating device 40, signal amplify and harvester 50 three parts, wherein, described small negative step force signal occurs to comprise electromagnetic launch system with regulating device, static load device and bullet locking apparatus three part:
Electromagnetic launch system: be made up of charging and discharging circuit, launching trajectory 4, wherein charging and discharging circuit is made up of charging voltage tunable capacitor group 1, rectifier bridge 21, contact switch 2, charge switch 22, solenoid 3; Solenoid 3 is embedded in launching trajectory or is closely wrapped in outside launching trajectory 4.Launching trajectory 4 is the cylindrical, hollow pipelines be made up of low-friction coefficient, non-magnetic, non-conducting material, and launching trajectory 4 upper end outside surface makes screw thread, and lower end has the symmetrical openings of being convenient to load and unload electromagnetism counterweight.
Static load device: be made up of electromagnetism counterweight 5 and static load fine rule 6; Electromagnetism counterweight 5 is the counterweights of the different quality same shape be made up of high-permeability material, the head design taper counterweight cap in echelon of electromagnetism counterweight 5, and static load fine rule 6 connects electromagnetism counterweight 5 by counterweight cap; Static load fine rule 6 is the filaments be made up of the flexible material that density is less; Static load fine rule 6 one end connects electromagnetism counterweight, and the other end is connected to described sensor and fixes with in the installation of regulating device and setting nut 16, and through playing central through hole 13 and launching trajectory 4 center of locking apparatus.Before calibration experiment, electromagnetism counterweight 5 is connected by static load fine rule 6 and is suspended in launching trajectory 4, and coaxial with launching trajectory 4.
Play locking apparatus: stop track 7 by bullet, setting nut 8, spring 10, buckle 11, central through hole 13, radial direction through hole 12 form.Bullet stops the central through hole 13 that track 7 center comprises the variable cross section of inner band center screw thread 14 in the axial direction, and launching trajectory 4 and bullet are stopped track 7 and docked by the center screw thread 14 on this central through hole 13.Bullet stops the uniform cross section through hole of the circumferential symmetric design of track 7 two band length-specific internal thread, spring 10 and buckle 11 are placed in this circumferential uniform cross section through hole, setting nut 8 stops track 7 by the internal thread of this circumferential uniform cross section through hole with bullet and spring 10 is connected, spring 10 and setting nut 8 are hinged and just connect with planar end surface one end of buckle 11 by spherical hinge, and buckle 11 other end is the oblique section towards having a down dip.
Sensor in the present invention is fixed to comprise further with regulating device and is installed and setting nut 16 and piezoelectric type Micro-force sensor 15 two parts to be calibrated.Wherein, install and be threaded with setting nut 16 one end, center, one end is with wiring hole; Install and be connected in series by screw thread with setting nut 16 and piezoelectric type Micro-force sensor 15 to be calibrated; Static load fine rule 6 is fixedly connected on by wiring hole and installs with on setting nut 16.The sensor is fixed to amplify with regulating device and signal and is connected by concentric cable 17 with between harvester.
During calibration experiment, electromagnetism counterweight 5 is launched into and plays in locking apparatus, stuck fixing by buckle 11.
Embodiment 2
The present invention also provides a kind of and utilizes the above-mentioned scaling method carried out based on the Micro-force sensor dynamic calibration system of small negative step force, comprising:
Step one: before a calibration experiment: as shown in Figure 1, the electromagnetism counterweight 5 of preferred appropriate mass, the present embodiment first selects quality to be 5g electromagnetism counterweight, connects electromagnetism counterweight 5 and be suspended in launching trajectory 4 with static load fine rule 6, with launching trajectory 4 coaxially and do not contact with launching trajectory; This electromagnetism counterweight 5 produces a downward acting force to piezoelectric type Micro-force sensor to be calibrated under gravity;
Step 2: use concentric cable connection Micro-force sensor and electric signal to amplify and harvester.After treating electromagnetism counterweight 5 attitude stabilization, the piezoelectric type Micro-force sensor voltage signal bringing into use oscillograph recording to be calibrated, now, piezoelectric type Micro-force sensor 15 to be calibrated produces a small and erratic positive step force signal, and this signal will decay to zero rapidly;
Step 3: preferably suitable voltage is for charge to charging voltage tunable capacitor group 1;
Step 4: after treating that oscilloscope signal is stable, namely signal is after zero, and contact switch 2 is opened, and launches, enter rapidly bullet and stop in track 7 under the pulse magnetic effect that electromagnetism counterweight 5 produces at solenoid 3 along electromagnetic path 4, and stuck by buckle 11; Now, the gravity of the electromagnetism counterweight that piezoelectric type Micro-force sensor to be calibrated originally bore rapidly disappears, produce a small and accurate negative step force signal instantaneously, this negative step force size equals the gravity of electromagnetism counterweight, and this negative step force is on a timeline by permanent stable existence; Preservation voltage signal changes, and has demarcated for first group.
Step 5: after a calibration experiment: at launching trajectory 4 interior lower end pad rubber blanket, bullet of outwarding winding stops the buckle 11 that the setting nut 8 in track 7 connects, electromagnetism counterweight 5 is released, rubber blanket plays a buffer protection to the electromagnetism counterweight released and utilizes, opening part in launching trajectory 4 lower end changes the electromagnetism counterweight of different quality, the present embodiment respectively service property (quality) is 10g, 20g, 50g, 100g, 200g, 400g, 500g electromagnetism counterweight repeats above-mentioned steps one, two, three, four, can perform the demarcation that different size bears step force signal; Preserve relevant voltage signal intensity.Fig. 2 is a piezoelectric type Micro-force sensor dynamic calibration experiment electrical signal data.
Step 6: to demarcating the voltage signal obtained and the gravitational cue i.e. negative step force signal fitting obtained that converted by corresponding electromagnetism counterbalance mass at every turn, conveniently can obtain the accurate dynamic calibration result of piezoelectric type Micro-force sensor to be calibrated, i.e. voltage and dynamic load relation curve, as shown in Figure 3.
Embodiments of the invention 2 pairs of piezoelectric type Micro-force sensors have carried out dynamic calibration, and the dynamic calibration problem for the dynamic Micro-force sensor of other non-depressed electric-type is applicable equally.
Known by above each embodiment, the beneficial effect that the application exists is:
First, because one of major defect (or feature) being applied to the piezoelectric type Micro-force sensor of kinetic measurement inevitably the static force signal be applied to it is rapidly decayed to zero, and dynamic force signal changes in time and can record for a long time.The present invention will make full use of this shortcoming (or feature), shortcoming is converted into advantage, piezoelectric type Micro-force sensor is utilized to hang an electromagnetism counterweight, the positive step force that this static force signal of the gravity of electromagnetism counterweight produces rapidly decays to zero, when the electromagnetism counterweight adopting ELECTROMAGNETIC LAUNCH TECHNOLOGY to launch this suspension straight up, what the piezoelectric type Micro-force sensor be attached thereto while electromagnetism counterweight is launched originally was subject to decay to zero positive step force signal will change rapidly accurate small negative step force signal into, and this negative step force size equals the gravity of electromagnetism counterweight, direction is contrary.Because electromagnetism counterweight is launched away bullet stop in track be stuck fixing, thus the existence that this negative step force can be stable for a long time on a timeline.Visible, the system that the present invention proposes and technology have the function accurately producing small negative step force cleverly, and simple and compact for structure, economical and practical, simple operation.
The second, due to used electromagnetism counterweight can be repeatedly stable repeatedly transmitting use, thus this Micro-force sensor dynamic calibration system based on small negative step force of the present invention and technology have the outstanding advantages that can repeat and accurately produce identical small negative step force when doing calibration experiment, thus, there is the stability of well repeatability and height, and noise is little waits outstanding advantages.
Although three, the present invention is for piezoelectric type Micro-force sensor, the dynamic calibration problem for the dynamic Micro-force sensor of other non-depressed electric-type is applicable equally.Therefore, applied widely is another advantage of this invention.
Those skilled in the art should understand, the embodiment of the application can be provided as method, device or computer program.Therefore, the application can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the application can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
Above-mentioned explanation illustrate and describes some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the application, then all should in the protection domain of the application's claims.
Claims (8)
1. based on a Micro-force sensor dynamic calibration system for small negative step force, it is characterized in that, comprising: small negative step force signal occurs to fix with regulating device, sensor to amplify and harvester with regulating device, signal,
Described small negative step force signal occurs comprise electromagnetic launch system, static load device with regulating device and play locking apparatus;
Described small negative step force signal occurs to be connected with regulating device by described static load device and described sensor are fixing with regulating device; Fixing amplification by concentric cable and described signal with regulating device is connected with harvester described sensor;
Described electromagnetic launch system comprises charging and discharging circuit and launching trajectory, and described charging and discharging circuit comprises charging voltage tunable capacitor group, rectifier bridge, contact switch, charge switch and solenoid; Described solenoid is embedded in described launching trajectory or is closely wrapped in outside described launching trajectory.
2., according to claim 1 based on the Micro-force sensor dynamic calibration system of small negative step force, it is characterized in that,
Described launching trajectory is the cylindrical, hollow pipeline be made up of low-friction coefficient, non-magnetic, non-conducting material, and described launching trajectory upper end outside surface makes screw thread, and lower end has the symmetrical openings for loading and unloading electromagnetism counterweight.
3., according to claim 1 based on the Micro-force sensor dynamic calibration system of small negative step force, it is characterized in that,
Described bullet locking apparatus comprises bullet and stops track, setting nut, spring, buckle, central through hole and radial direction through hole;
Described bullet stops the central through hole that orbit centre comprises the variable cross section of inner band center screw thread in the axial direction, and described launching trajectory and described bullet are stopped track and docked by the center screw thread on described central through hole; Described bullet stops track circumference symmetric design two uniform cross section through holes being with length-specific internal thread, described spring and described buckle are placed in this circumferential uniform cross section through hole, and described setting nut stops track by the internal thread of this circumferential uniform cross section through hole with described bullet and described spring is connected; Described spring and described setting nut are hinged and just connect with planar end surface one end of described buckle by spherical hinge, and the described buckle other end is the oblique section towards having a down dip.
4., according to claim 3 based on the Micro-force sensor dynamic calibration system of small negative step force, it is characterized in that,
The central through hole that described bullet stops track is variable cross section through hole.
5., according to claim 1 based on the Micro-force sensor dynamic calibration system of small negative step force, it is characterized in that,
Described static load device comprises electromagnetism counterweight and static load fine rule, described electromagnetism counterweight is the counterweight of the different quality same shape be made up of high-permeability material, the head design taper counterweight cap in echelon of described electromagnetism counterweight, described static load fine rule connects counterweight by counterweight cap; Described static load fine rule one end is connected to described sensor and fixes with on the installation of regulating device and setting nut, and the other end runs through bullet and stops track and described Electromagnetic Launching track, and connects described electromagnetism counterweight;
Described static load fine rule is the filament be made up of the flexible material that density is less; Before calibration experiment, described electromagnetism counterweight is connected by described static load fine rule and is suspended in described launching trajectory, and coaxial with described launching trajectory.
6., according to the arbitrary described Micro-force sensor dynamic calibration system based on small negative step force of Claims 1 to 5, it is characterized in that,
During calibration experiment, the electromagnetism counterweight of described suspension is launched in described bullet locking apparatus, stuck fixing by buckle.
7., according to the arbitrary described Micro-force sensor dynamic calibration system based on small negative step force of Claims 1 to 5, it is characterized in that,
Described sensor is fixed to comprise with regulating device and is installed and setting nut and piezoelectric type Micro-force sensor to be calibrated, and one end of described installation and setting nut is threaded, and other end center is with wiring hole; Described installation and setting nut and described piezoelectric type Micro-force sensor to be calibrated are connected in series by screw thread; Described static load fine rule is fixedly connected on described installation and setting nut by described wiring hole.
8. utilize the arbitrary described scaling method carried out based on the Micro-force sensor dynamic calibration system of small negative step force of claim 1 ~ 7, it is characterized in that, comprising:
Before a calibration experiment: the preferably electromagnetism counterweight of appropriate mass, connects with static load fine rule and be suspended in launching trajectory, coaxial with launching trajectory; Described electromagnetism counterweight produces a downward acting force to piezoelectric type Micro-force sensor to be calibrated under gravity, and now, piezoelectric type Micro-force sensor to be calibrated produces a small and erratic positive step force signal, and this signal will decay to zero rapidly;
During a calibration experiment: preferably suitable voltage charges to charging voltage tunable capacitor group, after charging complete, contact switch is opened, and goes out under the pulse magnetic effect that electromagnetism counterweight produces at solenoid along electromagnetic rail launching, enter rapidly bullet and stop track, and stuck by buckle; Now, the gravity of the electromagnetism counterweight that piezoelectric type Micro-force sensor to be calibrated originally bore rapidly disappears, produce a small and accurate negative step force signal instantaneously, this negative step force size equals the gravity of electromagnetism counterweight, and this negative step force is on a timeline by permanent stable existence;
After a calibration experiment: bullet of outwarding winding stops the buckle that in track, setting nut connects, and electromagnetism counterweight is released;
Opening part in launching trajectory lower end changes the electromagnetism counterweight of different quality, repeats above three step calibration experiments, performs the demarcation that different size bears step force signal.
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| CN105910755A (en) * | 2016-05-23 | 2016-08-31 | 中国人民解放军装备学院 | Calibration device applicable to micro thrust measurement system electromagnetic force application device |
| CN106802213A (en) * | 2017-01-10 | 2017-06-06 | 大连理工大学 | A kind of micro-electromagnetic force detection means |
| CN108414127A (en) * | 2018-02-01 | 2018-08-17 | 南京航空航天大学 | Compensation Micromass cell culture torsion balance |
| CN108896398A (en) * | 2018-08-31 | 2018-11-27 | 中国航天空气动力技术研究院 | A kind of dynamic calibration equipment generating negative step load |
| CN111174969A (en) * | 2020-03-06 | 2020-05-19 | 合肥工业大学 | Dynamic calibration equipment for multi-dimensional force sensor generating negative step |
| CN111220322A (en) * | 2019-11-08 | 2020-06-02 | 中北大学 | Negative step calibrating device |
| CN113970403A (en) * | 2021-10-12 | 2022-01-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Negative step force generation device and method |
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