CN104655343B - High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device - Google Patents
High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device Download PDFInfo
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- CN104655343B CN104655343B CN201510067138.8A CN201510067138A CN104655343B CN 104655343 B CN104655343 B CN 104655343B CN 201510067138 A CN201510067138 A CN 201510067138A CN 104655343 B CN104655343 B CN 104655343B
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- strain
- firer
- acting device
- cantilever beam
- pushing force
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Abstract
The invention discloses a high-precision measuring method for the dynamic pushing force of a micro initiating explosive actuated device. The high-precision measuring method is based on the strain measuring principle of a strain transducer of a cantilever beam type; through static calibration of the stress-strain curve of a cantilever beam on an elastic deformation stage, the corresponding relation between the stress of the cantilever beam and the strain capacity of the strain transducer can be obtained, a cantilever beam is designed for mounting and fixing of the strain transducer, and a proper data acquisition system is adopted, so that the strain transducer can precisely measure the dynamic pushing force-stroke relation of the micro initiating explosive actuated device; compared with the conventional pushing force measuring methods, such as a method for upwards pushing a weight or a method utilizing a pressure sensor, the high-precision measuring method provided by the invention has the advantages that the full-stroke pushing force-time variation relation can be obtained through one-time measuring of the pushing force, the interference effect on the pushing force of a sample to be measured is weak, and the measuring precision is high. According to the measuring principle, the high-precision measuring method can also be utilized for measuring the pushing force of each moving part of initiating explosive actuated devices which have various sizes and various degrees of the pushing force.
Description
Art
The present invention relates to a kind of method of testing of firer's acting device thrust output, particularly miniature firer's acting device height
Precision dynamic pushes away the method for testing of force-time relationship, belongs to fire-working article test technical field.
Background technology
The arming process in fuzes mechanism of miniature firer's acting device and cantilever beam composition is widely used in micro-electro-mechanical systems
In system (MEMS), the relation of its method for designing is the cantilever beam of the certain bending strength-travel relationships of correspondence selecting firer's start
The parameter such as device thrust, stroke and cantilever material, size, displacement.Wherein the thrust of firer's actuator-time parameter is designed is
Key technology.The method of traditional measurement firer's acting device thrust performance has two kinds：Promote weight method and pressure transducer method.
Promote weight method that the load such as counterweight of constant weight is loaded above the piston of firer's acting device, test piston will be much heavy
The load of amount boosts how high, the continuous weight for changing counterweight in test, to determine the acting limit of power of firer's acting device.Should
Method test error is big, is affected greatly by counterweight weight size, and the piston in firer's acting device is in a flash promoting load
Can be separated from each other, it is impossible to measure dynamic thrust-travel relationships, firer's acting device explosive load design and Izod strength are designed
Directiveness is poor.And pressure transducer method is one pressure transducer of placement at a certain distance from apart from piston end, when piston is transported
When moving herein, thrust size can be struck on pressure transducer and be recorded, the thrust of firer's acting device is determined with this.
Sensor in the method is fixed, without moving with the motion of piston, can only obtain firer's acting device and exists
Push away force-time relationship at fixed journey system position, and because the athletic meeting of piston produces certain impact shock, to test result
Have a certain impact.Obviously these conventional test methodologies can not all meet and miniature firer's acting device thrust output-time is closed
The test request of system.And the country still lacks the standards and norms of the thrust method of testing of firer's acting device at present, is also badly in need of
Formulate a technical specification that can realize standardization measurement.
Shandong in 1996 is built and is deposited et al.《The calculating of piston actuator output parameter and test》In once adopt pressure transducer
Thrust output-the time graph of piston actuator is tested.Find out from the test result of 9 tests, the piston start
The thrust output peak value of device is between 598～755N, but the method is also based on traditional pressure transducer method to test, real
Need to fix in testing that sensor is motionless, and the piston of firer's acting device is accelerated by the promotion of powder gases and strikes biography
On sensor, the drawbacks of this method has obvious, when sensor is when being acted on by piston impact load, produce very big dynamic
Stress and dynamic deformation, within the extremely short time, the speed of piston can also occur greatly change, and the thrust for measuring not is true
Gunpowder effect under piston thrust.National University of Defense technology Wu Wen outstanding persons exist within 2003《The priming system dynamic test system that is used as power sets
Meter and realization》Middle employing piezoelectric force transducer and acceleration transducer, produce to piston actuator on special counterweight car
Thrust carried out direct test, its test system mainly includes thrust pickup, testboard bay, data collecting system etc..But
It is that counterweight load in the system can't represent practical situations, counterweight is different, and the thrust for measuring is also different, and counterweight
The size and thrust magnitude of car are not suitable for the measurement for pushing away force-time relationship of miniature firer's acting device.
It can be said that for existing thrust method of testing be only from qualitative or semiquantitative angle come judge firer's start fill
The acting performance put, total travel still can not be carried out to firer's acting device push away force-time relationship Performance Evaluation.Want to reach now
For the technical requirements of MEMS, it is difficult to realize to continue the simple prior art using in document or combination, in addition it is also necessary to
Explore new test philosophy and could solve above-mentioned technical barrier.
The content of the invention
It is not enough present in above-mentioned method of testing in order to overcome, improve the measurement essence of miniature firer's acting device output power
Degree, the present invention propose the method for testing based on beam type strain transducer, by static demarcating cantilever beam in elastic deformation rank
The load-deformation curve of section, obtains the corresponding relation of cantilever beam stress and strain transducer strain amount, then will post strain sensing
Known to device and strain-stress relation, cantilever beam is used as thrust dynamic measurement sensor, you can the miniature firer's start of accurate measurement
Device dynamically pushes away force-time relationship.
The technical solution adopted for the present invention to solve the technical problems is：
Based on the strain testing principle of beam type strain transducer, by static demarcating cantilever beam in elastic deformation stage
Load-deformation curve, obtain the corresponding relation of cantilever beam stress and strain transducer strain amount, in firer's acting device
During piston setting in motion, promote cantilever beam bend, strain transducer sensing the cantilever beam amount of bending strain-when anaplasia
Change signal and changed by signal conditioner and data collecting system is transferred to after amplifying signal, then by the stress-strain for obtaining
Curve calculates the miniature firer's acting device of acquisition and dynamically pushes away force-time relationship.
According to the measuring principle of the present invention, a thrust performance based on firer's acting device of cantilever beam sensor is designed
Test system, its composition mainly include tested firer's acting device, firer's acting device stationary fixture, cantilever beam, strain sensing
Device, cantilever beam stationary fixture, signal conditioner, data collecting system, ignition control chamber and power supply, wherein strain transducer pass through
Binding agent is pasted onto at a certain distance from cantilever beam top, firer's acting device, firer's acting device fixing device, cantilever
Beam, cantilever beam stationary fixture are bolted together, and cantilever beam is close on the top of piston in firer's acting device
And it is concordant with the top of cantilever beam.When the piston setting in motion of firer's acting device, cantilever beam is promoted to occur bending and deformation, cantilever
The strain transducer on beam surface starts to gather strain signal and send data collecting system to.
Selected is that cantilever beam size, material and the cantilever beam in actual fuse arming process in fuzes mechanism keep one
Cause, the thrust output-time relationship of measured miniature firer's acting device corresponds to the thrust-time during practical function
Relation, measurement result can be directly used for miniature firer's acting device thrust evaluation.
In one mark line in the lower section of foil gauge and side Uniting, when sensor is pasted, it is ensured that foil gauge with it is outstanding
Arm Liangping is neat.This installation method of foil gauge does not interfere with the original structure of firer's acting device, size and makees dynamic characteristic.
After extraneous given low baking temperature work acting device predetermined excitation energy, the igniting of ignition part, the work done medicament that ignites release
High temperature and high pressure gas promote piston axially-movable, while cantilever beam occurs bending and deformation under the thrust of piston, foil gauge
The strain variation signal that bends of sensing cantilever beam is changed by signal conditioner and is transferred to dynamic analysis after amplifying signal
Instrument is stored in real time, then show that the dynamic thrust of miniature firer's acting device-time closes by stress-strain demarcation relation conversion
System.
The invention has the beneficial effects as follows：The method for pushing away force-time relationship of the miniature firer's acting device of this kind of kinetic measurement
The original kinetic characteristic of firer's acting device is not changed, what a thrust measurement can obtain total travel pushes away force-time relationship, to quilt
The promotion interference effect of test sample product is little, the features such as certainty of measurement is high.According to the present invention principle apply also for various sizes and
The thrust measurement of firer's acting device moving component of thrust.Thrust, displacement in accurate measurement firer's acting device etc. are moved
There is in terms of characteristic test method good popularizing application prospect.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the operation principle schematic diagram of beam type strain transducer.In figure, strain transducer is installed in apart from cantilever
At beam fixing end i, cantilever beam length is l, and F is the thrust applied at terminal B to cantilever beam, and ω is work of the cantilever beam in power F
With the displacement of lower generation, the i.e. stroke of firer's acting device, θ is that cantilever beam deforms the angle of bend for producing.
Fig. 2 be miniature firer's acting device to the view before and after cantilever beam effect, in figure, a is original state, and b is
Post exercise state.
Fig. 3 is the start characteristic measuring system structural representation of the miniature firer's acting device based on present invention design.
Fig. 4 is the exemplary push-time graph of miniature firer's acting device piston.
Specific embodiment
In FIG, strain transducer is installed at cantilever beam fixing end i, what the piston of firer's acting device was produced
Thrust F is acted at the B of cantilever beam, so as to cause cantilever beam to bend, foil gauge inducedstress variable signal εi, Jing signals
Processor is processed and is recorded.Obtaining strain signal εiAfterwards, thrust F is calculated by equation below.
In formula：εiFor the strain value at i；W be bending resistant section coefficient, W=bh2The height of/6, h for cantilever beam square-section, b
For the width of square cantilever beam square-section；Elastic modelling quantity of the E for cantilever material.ε is obtained by strain transduceriWith the change of time
Change curve, it is possible to the thrust-time graph of accurate measurement firer's acting device piston element.
Fig. 2 is the state before and after the effect of firer's acting device, and in figure, a is original state, and b transported completely for firer's acting device
The dynamic state for realizing actuator function in place.
In Fig. 3, measurement firer's acting device make dynamic characteristic before, first by strain transducer paste on a cantilever beam, so
Connect measuring system circuit according to Fig. 3 afterwards.According to the resistance of the nominal ignition condition and measuring system circuit of initiator (1),
Adjust the voltage swing of ignition control chamber (7)；When the switch of ignition control chamber (7) is opened, initiator (1) starts to be under fire, together
Fused signal trigger data acquisition system (9) of Shi Fahuo control chambers (7) simultaneously makes its service aisle start to gather each road signal, rises
Quick-fried device (1) is ignited to do work medicament (2) and produce raw high temperature and high pressure gas after being under fire and promotes piston (3) along housing (4) inwall structure
Into plunger shaft initially axially move rapidly, the cantilever beam (5) contacted with piston (3) also begins to occur bending and deformation, strain pass
Sensor (6) starts to gather strain signal and send signal conditioner (10) to, sends data collecting system to after amplified conversion
(9)；When piston (3) is when the motion of predetermined distance is completed, strain transducer (6) has gathered cantilever beam (5) in this start process
In strain information, and strain-time graph is produced in data collecting system (9), then by the load-deformation curve for obtaining
Calculate acquisition firer's acting device and dynamically push away force-time relationship.In whole activity acting device motor process, power supply (8) is given
Ignition control chamber (7), data collecting system (9) and signal conditioner (10) provide each required electric current.
Fig. 4 is the exemplary push-time graph measured using strain transducer, and the fused signal of ignition control chamber (7) is touched
The moment for sending out data collecting system (9) is time of ignition, and piston promotes the moment that cantilever beam bends to be thrust starting
Point, starts to thrust starting point to be duration of ignition t from ignitingf, with the accelerated motion of piston, thrust is started from scratch change,
And the thrust peak value for reaching that maximum is firer's acting device that accelerated within the regular hour always, corresponding abscissa
Value is t action time of firer's acting devicee。
Claims (3)
1. a kind of Dynamic High-accuracy thrust method of testing of miniature firer's acting device, is characterized in that：Strained based on beam type
The strain testing principle of sensor, by static demarcating cantilever beam in the load-deformation curve of elastic deformation stage, obtains cantilever
When the corresponding relation of stress beam and strain transducer strain amount, piston setting in motion in firer's acting device, cantilever is promoted
Beam bends, and the strain-time-varying signal of the strain transducer sensing cantilever beam amount of bending simultaneously passes through signal conditioner
Conversion is transferred to data collecting system after amplifying, then can obtain miniature by the stress-strain calibration curve conversion for obtaining in advance
Firer's acting device dynamically pushes away force-time relationship.
2. the Dynamic High-accuracy thrust method of testing of miniature firer's acting device according to claim 1, is characterized in that：Institute
Selected cantilever beam size, material are consistent with the cantilever beam in actual fuse arming process in fuzes mechanism, measured
Miniature firer's acting device pushes away force-time relationship corresponding to force-time relationship is pushed away during practical function, and measurement result can
It is directly used in miniature firer's acting device thrust evaluation.
3. the Dynamic High-accuracy thrust method of testing of miniature firer's acting device according to claim 1, is characterized in that：It is logical
The external force static demarcating beam type strain transducer strain-stress relation of accurate loading is crossed, and cantilever beam stress is obtained with strain
The corresponding relation of strain transducer amount, the miniature firer's acting device of accurate measurement dynamically push away force-time relationship.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510067138.8A CN104655343B (en) | 2015-02-09 | 2015-02-09 | High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device |
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| CN201510067138.8A CN104655343B (en) | 2015-02-09 | 2015-02-09 | High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device |
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| CN104655343A CN104655343A (en) | 2015-05-27 |
| CN104655343B true CN104655343B (en) | 2017-04-26 |
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| CN113609579B (en) * | 2021-07-21 | 2024-05-10 | 上海机电工程研究所 | Method and system for identifying explosive load of initiating explosive device |
Citations (5)
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|---|---|---|---|---|
| US4630472A (en) * | 1985-09-03 | 1986-12-23 | Chrysler Motors Corporation | Seat belt testing device |
| CN1290856A (en) * | 2000-11-09 | 2001-04-11 | 常柴股份有限公司 | Measurement of engine mechanical efficiency and back drawing test system |
| CN101539465A (en) * | 2009-04-24 | 2009-09-23 | 北京航空航天大学 | Propellant pipeline connecting device based on elastic axis |
| CN103674524A (en) * | 2013-11-29 | 2014-03-26 | 北京宇航系统工程研究所 | Testing device connected with push-punching type initiating explosive device |
| CN103837280A (en) * | 2014-03-31 | 2014-06-04 | 常州工学院 | Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory |
-
2015
- 2015-02-09 CN CN201510067138.8A patent/CN104655343B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630472A (en) * | 1985-09-03 | 1986-12-23 | Chrysler Motors Corporation | Seat belt testing device |
| CN1290856A (en) * | 2000-11-09 | 2001-04-11 | 常柴股份有限公司 | Measurement of engine mechanical efficiency and back drawing test system |
| CN101539465A (en) * | 2009-04-24 | 2009-09-23 | 北京航空航天大学 | Propellant pipeline connecting device based on elastic axis |
| CN103674524A (en) * | 2013-11-29 | 2014-03-26 | 北京宇航系统工程研究所 | Testing device connected with push-punching type initiating explosive device |
| CN103837280A (en) * | 2014-03-31 | 2014-06-04 | 常州工学院 | Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory |
Non-Patent Citations (1)
| Title |
|---|
| 同时测试火工品输出多参量的爆发器研究;毕文辉等;《仪器仪表用户》;20090608(第03期);9-10 * |
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