CN102539049A - Capacitance pressure tester - Google Patents
Capacitance pressure tester Download PDFInfo
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- CN102539049A CN102539049A CN2012100162967A CN201210016296A CN102539049A CN 102539049 A CN102539049 A CN 102539049A CN 2012100162967 A CN2012100162967 A CN 2012100162967A CN 201210016296 A CN201210016296 A CN 201210016296A CN 102539049 A CN102539049 A CN 102539049A
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Abstract
The invention discloses a capacitance pressure tester, and belongs to the technical field of electronic testing instruments. The tester adopts a metal casing outer barrel as a movable polar plate of a capacitor; a three-segment type inner barrel and the outer barrel of the movable polar plate are coaxially arranged in the outer barrel in a matched manner; the middle segment of the inner barrel is selected as a fixed polar plate of the capacitor; a measuring circuit of the capacitor is arranged in the fixed polar plate; a light charge power supply is arranged at the front segment of the inner barrel; an optical fiber conducting wire in synchronous triggering is arranged at the rear segment of the inner barrel; one end of the optical fiber conducting wire is connected with a light-operated switch of the measuring circuit of the capacitor for control; and the other end of the optical fiber conducting wire is arranged outside the casing of the capacitor. The tester is mainly formed by one testing capacitor, has the technical characteristics of electromagnetic shielding by the metal shell, antijamming, charging by light, light triggering measurement, optical fiber data communication, circuit encapsulation and solidification, and the like, is an intrinsically safe, explosion-proof, tiny, disassembly-free and assembly-free pressure tester with low power consumption and capacitance, has the advantages of reasonable structure, fast synchronous response, convenience for use, low manufacturing cost and wide application range, and deserves application and popularization.
Description
One. technical field
Capacitive pressure tester disclosed by the invention belongs to the electronic instrument technical field, and what be specifically related to is that the explosion-proof essential safe type of a kind of full light charging with characteristics such as small volume, high reliability, high measurement accuracies, photocontrol, optical fiber communication is exempted from the capacity-type electronic pressure tester that loan at call is gone into.
Two. background technology
The capacity-type electronic pressure tester is to be suitable for the testing tool that fires an internal pressure (penetrating pneumatics power etc. like electrothermal chemical gun breech pressure, bullet bottom pressure using, cannon breech pressure, oil well) test, is applicable to and carries out the transient pressure test environment under the particular surroundings that has high temperature, high pressure in the powder burning zone.Singularity to its environment for use; Require this capacity-type electronic pressure tester must possess following performance and function: 1. fire in the district that fiery explosive fires particle and high temperature can directly act on tester; This just requires tester to bear to fire an inner high voltage and follows the effect of the TRANSIENT HIGH TEMPERATURE that high pressure occurs, and therefore the environmental suitability to the capacity-type electronic pressure tester requires very high.2. tester needs and ammunition are protected high and low temperature together, directly put into bore shooting test gun pressure after the insulation, and be therefore, very high to the high temperature performance requirement of capacity-type electronic pressure tester.3. because tester often need be built in the fiery explosive in advance; This volume to the capacity-type electronic pressure tester has strict restriction; With regard to cannon chamber pressuring test, according to " gun interior ballistics method of testing " GJB, the electric voltage detector volume must be less than 2.0% of chambervolume; For medium gun, this requirement is very harsh.4. the impact that is caused when the capacity-type electronic pressure tester is wanted to bear the powder gases disturbance when the checkout area internal pressure.5. when testing when many capacitive pressures are tester simultaneous, the markers of test or the time base to unify.In a word; It is all exceedingly odious to fire an interior test environment; Not only require high temperature resistant, the anti-HI high impact vibration of capacity-type electronic pressure tester, adapt to high and low temperature environment, require the capacity-type electronic pressure tester to have small volume, low-power consumption, high reliability, high-precision characteristics simultaneously.
At present; With regard to domestic built-in electron pressure tester with abroad comparatively speaking with kind pressure tester device; Gaging pressure reaches the volume of 800MPa mostly all at more than 20 cubic centimetres, for example: the built-in electron pressure tester of the 600MPa of HPI company, this tester volume is 22cm
3, and the home products volume also reaches 22cm
3About, last year, HPI company released 9cm
3Built-in electron pressure tester, but its measurement range is 0～150MPa, is only applicable to the pressure survey of mortar.This far can not satisfy the requirement of the microminiaturized big pressure of built-in electron pressure tester.In addition, at present because the employed pressure transducer price of electron pressure tester is very expensive, caused the cost of electron pressure tester to be difficult to reduce.Used century-old copper post (copper ball) electron pressure tester for replacing, this is the main bottleneck that current restriction electron capacitance formula pressure tester is applied.China is that first has begun to promote the use of the country of electron pressure tester in the world, and the price that reduces the electron pressure tester will make the electron pressure tester can popularize use in an all-round way, this for the national defense construction of China with significant.
Three. summary of the invention
The objective of the invention is: this capacitive pressure measuring instrument is provided to society; Time base reunification when this measuring instrument has solved and fired a volume of internal pressure tester and measure difference pressure greatly, simultaneously; Can the gaging pressure scope at 800MPa with an interior various internal pressure that fire, for example oil downhole perforation pressure, cannon gun pressure, bullet bottom pressure using, electrothermal chemical gun gun pressure etc.
Technical scheme of the present invention is such: this capacitive pressure tester; Be that the microminiature of exempting to tear open is put into formula capacitance method electron pressure tester; Technical characterstic is: the movable plate electrode, syllogic inner core and the movable plate electrode urceolus coaxial cable that adopt the tubular metal shell urceolus of being with fillet to make capacitor are equipped with in urceolus; Select the stage casing of inner core to make the fixed plate of capacitor; The metering circuit of this capacitor is set in the fixed plate; Be provided with the light charge power supply in the leading portion of syllogic inner core, be provided with the optic fibre wire of synchronous triggering in the back segment of syllogic inner core, an end of optic fibre wire connect and control the light-operated switch of this capacitor measurement circuit, the other end of optic fibre wire is arranged on outside this capacitor casing.Described capacitive pressure tester serves as main formation with a testing capacitor, and project organization is unique, has many advantages.
According to above-described capacitive pressure tester, technical characterstic also has: the tubular metal shell of said band fillet selects for use the martensite actual effect steel metal material with high strength favorable elasticity to manufacture, and the metal material that described inner core is selected for use is a red copper.The betal can urceolus that adopts can effectively shield external electromagnetic waves.
According to above-described capacitive pressure tester; Technical characterstic also has: the light charge power supply that is provided with in the leading portion of described inner core is laser charge power supply a--silicon photocell; The front end face of inner core leading portion is offered the charging light window, between light window and silicon photocell, is provided with the fixing scattering of optical cement and moulds sheet, and the atresia screw plug of protection optical window is set outside light window; These are provided with, and photoelectric cell is burnt in the time of preventing to charge, and has guaranteed photronic safe, effectively power supply reliably like this.
According to above-described capacitive pressure tester; Technical characterstic also has: the optic fibre wire of described synchronous triggering is many capacitive pressure testers unified optic fibre wires that adopted of base when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, and the screw plug with holes that this optic fibre wire passes on the inner core back segment terminal surface is arranged on outside this capacitor casing.The optic fibre wire signal passing time of said employing is pressed passing time much smaller than combustion, and base is unified when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, makes many capacitive pressure tester synchronism detection precision high.
According to above-described capacitive pressure tester; Technical characterstic also has: the described syllogic inner core of a. is divided into three sections by the size positions that designs; Two sections outer end becomes interference fit with the step place at urceolus both ends respectively before and after it, and forms commonly with urceolus and to hold.Two sections of described inner core two ends respectively with the step place interference fit of urceolus, both solved the Insulation Problems of inner/outer tube, solved the Welding Problems of ground wire again, also guaranteed the right alignment of inner/outer tube simultaneously better.B. the stage casing of described inner core is as the fixed pole of capacitor, and two sections conducts weaken the protection ring that edge effect influences before and after it.Thereby such structure weakens even has eliminated all factors that disturbance inner core in the various practical operations influences capacitance variation.C. the described urceolus of selecting for use martensite actual effect steel to be processed into full-closed structure, urceolus ground connection becomes the shielding case that effective shielding external electromagnetic waves causes interference during use.
According to above-described capacitive pressure tester; Technical characterstic also has: the metering circuit that this capacitor is set in the described fixed plate adopts the casting glue embedding of low-k to be solidified into circuit body earlier under releasing process, after putting into the inner core interlude, uses the embedding of wax secondary again.The result of operation will be fixed in the inner core metering circuit that is assembled in the inner core stage casing better like this, receive the situation such as instability that HI high impact, strong motion cause circuit when avoiding testing.
According to above-described capacitive pressure tester; Technical characterstic also has: the metering circuit of described this capacitive pressure tester includes: transition micro capacitance circuit, signal conditioning circuit and memory circuit, wherein the capacitor of urceolus, inner core stage casing formation is metering circuit information acquisition of transition differential capacitance or measured sensor.Described transition differential capacitance metering circuit output connects the input of signal conditioning circuit, and signal conditioning circuit connects with memory circuit.
According to above-described capacitive pressure tester; Technical characterstic also has: an end of the described optic fibre wire of a. connects and controls the light-operated switch of the power management module of this capacitor measurement circuit, the conversion of this light-operated switch control capacitance formula pressure tester between from the dormant state to the duty.Design makes the capacitive pressure tester become the testing tool of low-power consumption like this.The data of b. gathering are through the infrared data transmission of carrying out, and this transport sector is by memory circuit, coding circuit, the infrared transceiver of this tester, and the infrared transceiver of receiving end, demoder, interface circuit, computing machine are formed.During the transmission data; Tester makes zero the binary data of storing and is sent out by infrared transceiver through in-line coding; The transceiver of receiving end sends to the HSDL-7001 codec with the NRZ data that receive, and decoded data are sent to computing machine through the USB2.0 interface with data.Adopt high-speed, low-power consumption, anti-interference optical fiber synchronous triggering transmission technology; Guarantee the real-time Transmission of detecting information; Being implemented in the real-time testing of electromagnetic screen downforce information, processing in real time and storage, real-time Transmission and reception in real time etc., is the new ideas method of testing of integrated, the dynamic test that combines of multiple hi-tech.
According to above-described capacitive pressure tester, technical characterstic also has: the microminiature capacity-type electronic pressure tester that the explosion-proof essential safe type that described this capacitive pressure tester is that the betal can electromagnetic screen is anti-interference, light charging, light trigger measurement, fiber optic data communication, circuit embedding solidify exempts to tear open.This capacitive pressure tester measurement range can reach 0～800MPa, and the measurement range of its electric capacity is 0～5pF, and its volume is not more than 12cm
3Can know that according to above-mentioned a series of technical indicators described this capacitive pressure tester is essential safe type, explosion-proof type, microminiature, low-power consumption, exempt from the electron pressure tester of the small capacitance of dismounting.
Capacitive pressure tester advantage of the present invention has: 1. capacitor urceolus of the present invention adopts the betal can full-closed structure to manufacture, and urceolus ground connection becomes the shielding case that effective shielding external electromagnetic waves causes interference during use.2. capacitor inner core of the present invention adopts the metal red copper; And two sections outer end is formed into interference fit with step place, urceolus both ends respectively before and after the inner core, also forms commonly with urceolus and holds, and has both solved the Insulation Problems of inner/outer tube; Solve the Welding Problems of ground wire again, also guaranteed the right alignment of inner/outer tube simultaneously better.3. the present invention adopts the inner core stage casing to make the fixed pole of capacitor, and two sections conducts weaken the protection ring of edge effect influence before and after it, thereby such structure weakens even eliminated all factors that disturbance inner core in the various practical operations influences capacitance variation.4. the metering circuit of this capacitor is set in the fixed plate of the present invention; Adopt the casting glue embedding to be solidified into circuit body earlier; After putting into inner core, use the embedding of wax secondary again; Such operating result will be fixed in the inner core metering circuit that is assembled in the inner core stage casing better, receive the situation such as instability that HI high impact, strong motion cause circuit when avoiding testing.5. to adopt the optic fibre wire of synchronous triggering be many capacitive pressure testers co-operation together in the present invention; Unified essential condition and the means of base when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, many capacitive pressure tester synchronism detection precision are high like this.The present invention adopt at a high speed, low-power consumption, anti-interference optical fiber synchronous triggering transmission technology, guarantee the real-time Transmission of detecting information to be implemented in real-time testing, the processing in real time and storage, real-time Transmission and reception in real time etc. of electromagnetic screen downforce information.This is the new ideas method of testing of integrated, the dynamic test that combines of multiple hi-tech.7. the present invention adopts laser charge power supply--silicon photocell; The front end face of inner core leading portion is offered the charging light window; Between light window and silicon photocell, scattering is set and moulds sheet, the screw plug of protection optical window etc. also is set, these are provided with, and photoelectric cell is burnt in the time of preventing to charge; Guaranteed photronic safe, effectively power supply reliably like this, the capacitive pressure tester that this tester is become exempt from dismounting.8. capacitive pressure tester of the present invention be have that the betal can electromagnetic screen is anti-interference, microminiature capacity-type electronic pressure tester that light charging, light trigger measurement, fiber optic data communication, circuit embedding solidify explosion-proof essential safe type exempts to tear open.This capacitive pressure tester measurement range can reach 0～800MPa, and the measurement range of its electric capacity is 0～5pF, and its volume is not more than 12cm
3Can know that according to above-mentioned a series of technical indicators described this capacitive pressure tester is essential safe type, explosion-proof type, microminiature, low-power consumption, exempt from the electron pressure tester of the small capacitance of dismounting.Advantages such as this capacitive pressure tester has rational in infrastructure, and volume is littler, and response is fast, easy to use, applied widely synchronously, and cost of manufacture is low are worth adopting and promoting.
Figure of description of the present invention has 5 width of cloth:
Fig. 1 is a capacitive pressure tester structural representation;
Fig. 2 is photoelectric cell charging synoptic diagram;
Fig. 3 is the metering circuit block diagram;
Fig. 4 is the metering circuit synoptic diagram based on the capacitor of charge-discharge principle;
Fig. 5 is that synoptic diagram is used in the pressure test of capacitive pressure tester.
In each figure, adopted unified label, promptly same object is used same label in each figure.In each figure: 1. inner core back segment; 2. metering circuit ground wire; 3. urceolus; 4. inner core stage casing; 5. casting glue; 6. lead; 7. battery ground wire; 8. inner core leading portion; 9. atresia screw plug; 10. outer cylinder front end optical window; 11. sheet is moulded in scattering; 12. photoelectric cell; 13. metering circuit; 14. sensor and circuit connection lines; 15. outer tube rear end optical window; 16. porose screw plug; 17. optic fibre wire; 18. cradle; 19. cradle laser hole; 20. cradle power lead; 21. sensor; 22. signal conditioning circuit; 23 gun pressure signals; 24. power management module; 25. single-chip data acquisition memory circuit; 26. host computer; 27.8M crystal oscillator; 28.USB translation interface; 29. constant current source; 30. instrument amplifier; 31. analog switch; 32. the control signal of discharging and recharging; 33. measured capacitance; 34. standard capacitance; 35. breech block; 36. propellant powder; 37. cartridge case; 38. bullet; 39 gun tubes; 40. capacitive pressure tester.
Four. description of drawings
Five. embodiment
Capacitive pressure tester non-limiting examples of the present invention is following:
Embodiment one. the capacitive pressure tester
The capacitive pressure tester that this is routine is that the microminiature of exempting to tear open is put into formula capacitance method electron pressure tester, and its concrete structure is united by Fig. 1～Fig. 5 and illustrated.Fig. 1 illustrates capacitive pressure tester structural representation; The movable plate electrode, syllogic inner core and movable plate electrode urceolus 3 coaxial cables that adopt the tubular metal shell urceolus 3 of being with fillet to make capacitor are equipped with in urceolus 3; Select the stage casing 4 of inner core to make the fixed plate of capacitor; The metering circuit 13 of this capacitor is set in the fixed plate; Be provided with light charge power supply-photoelectric cell 12 in the leading portion 8 of syllogic inner core, be provided with the optic fibre wire 17 of synchronous triggering in the back segment 1 of syllogic inner core, an end of optic fibre wire 17 connect and control the light-operated switch of this capacitor measurement circuit 13, the other end of optic fibre wire 17 is arranged on outside this capacitor casing 3.The tubular metal shell 3 of this example band fillet selects for use the martensite actual effect steel metal material with high strength favorable elasticity to manufacture; Its metal material yield limit stress is 2000Mpa; Can satisfy the needs of pressure test; The betal can urceolus 3 that adopts can effectively shield external electromagnetic waves, and this routine inner core 1,4,8 is selected the red copper metal material for use.The light charge power supply 12 that is provided with in the leading portion 8 of the inner core that this is routine is laser charge power supply a--silicon photocell; The front end face of inner core leading portion 8 is offered charging light window 10; Between light window 10 and silicon photocell 12, be provided with the fixing scattering of optical cement and mould sheet 11; The atresia screw plug 9 of protection optical window is set outside light window 10, and these are provided with, and photoelectric cell is burnt in the time of preventing to charge, and has guaranteed photronic safe, effectively power supply reliably like this.Provide inner/outer tube project organization size one example of the present invention: wherein urceolus 3 highly is 42.5mm, and external diameter is 18mm, and internal diameter is 12.2mm; The urceolus front/rear end is thick to be 3mm; Inner core 1,4,8 highly is 36.5mm, and external diameter is 11.5mm, and internal diameter is 10.5mm.Can know that through calculating capacitive pressure tester volume provided by the invention is 10.815cm
3, little more a lot of than current similar instrument volume.This routine syllogic inner core 1,4,8 is divided into three sections by the size positions that designs, and two section 1,8 outer end become interference fit with the step place at urceolus 3 both ends respectively, and hold altogether with urceolus 3 formation before and after it.Two section 1 of the inner core two ends, 8 and the step place interference fit of urceolus 3, both solved the Insulation Problems of inner/outer tube, solved the Welding Problems of ground wire again, also guaranteed the right alignment of inner/outer tube simultaneously better.The stage casing 4 of inner core is as the fixed pole of capacitor, and two section 1 of its front and back, 8 conducts weaken the protection ring of edge effect influence.Thereby such structure weakens even has eliminated all factors that disturbance inner core stage casing 4 in the various practical operations influences capacitance variation.Select for use martensite actual effect steel to be processed into the urceolus 3 of full-closed structure, urceolus 3 ground connection become the shielding case that effective shielding external electromagnetic waves causes interference during use.Guarantee inner core 1,8 two ends respectively with urceolus 3 when step place interference fit and ground wire welding and inner core leading portion 8 are placed photronic space; Make inner core stage casing 4 maximums as far as possible; Thereby make the sensor 21 pole plate useful area that constituted maximum, increase capacitance.The metering circuit 13 of the capacitive pressure tester that this is routine includes: transition micro capacitance circuit, signal conditioning circuit and memory circuit, wherein the capacitor of urceolus 3, inner core stage casing 4 formations is metering circuit information acquisition of transition differential capacitance or measured sensor 21.Described transition differential capacitance metering circuit output connects the input of signal conditioning circuit, and signal conditioning circuit connects with memory circuit.Fig. 3 provides the block diagram of metering circuit 13 of the present invention, and the metering circuit that is adopted is a transition small capacitance high speed metering circuit, comprising: signal conditioning circuit 22, power management module 24, single-chip data acquisition memory circuit 25,8M crystal oscillating circuit 27.Metering circuit 13 work clocks are provided by 8MHz crystal oscillating circuit 27, have selected the chip SG-310-SCF8M crystal oscillator of Epson for use.This clock chip stable performance, service area is 2.7V～3.6V, and current drain is little; The 3.3V of power management module 24 outputs of selecting above going for; And temperature range is wide, equal ability operate as normal between-40 ℃-85 ℃, the test that can resist high and low temperature environment.And this crystal oscillator also has an Enable Pin, and when having only this Enable Pin effective, crystal oscillator will be exported the clock of 8M.Fig. 4 is based on the metering circuit synoptic diagram of the capacitor of charge-discharge principle, and the schematic diagram of signal conditioning circuit 22 is shown.Signal conditioning circuit 22 adopts based on differential type DC charging method principle, and this circuit is respectively measured capacitance 33 altogether to be charged with standard capacitance 34 by two identical constant current sources.Discharge and recharge signal 32 and produce, be used for controlling the shutoff of analog switch by single-chip data acquisition memory circuit 25.When capacitive pressure tester urceolus 3 is under pressure; The capacitance of measured capacitance 33 changes; In the identical time, electric capacity two ends charging voltage is relevant with capacitance, so measured capacitance 33 and standard capacitance 34 is because electric capacity different; Can produce different voltages with different, according to formula (1): Δ U=It/C
1-It/C
2(1).Voltage difference changes between standard capacitance 34 and the measured capacitance 33; Voltage difference is exported to single-chip data acquisition memory circuit 25 after amplifying through the instrument amplifier in the signal conditioning circuit 22 30, and single-chip data acquisition memory circuit 25 can obtain the gun pressure curve after it is amplified, relatively waits processing.(1) in the formula, Δ U is the voltage difference between standard capacitance and the measured capacitance; C
1, C
2Be respectively the capacitance of measured capacitance 33 and standard capacitance 34; I is the charging current that constant current source produces, because two constant current sources are identical, therefore, constant current source is that standard capacitance equates that with the size of current of measured capacitance charging represent with I, t depends on the time length that discharges and recharges signal 32 that single-chip microcomputer produces.The power supply control technology of power management module 24 is gordian techniquies of this built-in electronic pressare-measuring instrument low-power consumption, and promptly circuit is supplied power to it when needs work, when not needing work, cuts off the power supply the ratio of power consumption when reducing the circuit invalid operation.In this example capacitive pressure tester, power management module 24 is selected the LP5996-3333 chip of little encapsulation for use, and this chip is fixing 3.3V voltage with the voltage transitions of photoelectric cell 12.Single-chip microcomputer enables to control the output terminal of power management module chip, and single-chip data acquisition memory circuit 25, signal conditioning circuit 22 and 8M crystal oscillator 27 circuit are supplied power respectively, has realized the purpose of its low power consumption and small volume.Single-chip data acquisition memory circuit 25 is made up of master and slave two MSP430FG4618.Single-chip microcomputer through the programming Control constant current source to the acquisition process of the discharging and recharging of electric capacity, gun pressure signal and metering circuit through functions such as communicating by letter between USB translation interface 28 and the host computer 26.The MSP430 single-chip microcomputer is the mixed-signal processor of a kind of 16 super low-power consumptions of TI company production, and its biggest characteristic is low-power consumption, is fit to be applied to adopt the battery powered occasion that works long hours.The characteristic of its low-power consumption can prolong battery service time on the one hand, reduces the battery volume, on the other hand, can reduce EMI (electromagnetic interference (EMI)), simplifies the PCB design.Simultaneously, single-chip microcomputer adopts the BGA encapsulation, can reduce the circuit module volume greatly.The metering circuit 13 of the capacitor 21 that is provided with in this routine fixed plate adopts the casting glue embedding of low-k to be solidified into circuit body earlier under releasing process, after putting into inner core stage casing 4, uses the embedding of wax secondary again.The result of operation will be fixed in the inner core metering circuit 13 that is assembled in inner core stage casing 4 better like this, receive the situation such as instability that HI high impact, strong motion cause circuit when avoiding testing.Fig. 2 illustrates the charging synoptic diagram of photoelectric cell 12 of the present invention, and wherein 18 is cradle, and 19 is the cradle laser hole, and 20 is the cradle lead.Before giving photoelectric cell 12 chargings; Back out the atresia screw plug 9 on urceolus 3 front ends earlier; The capacitive pressure tester is placed in the cradle 18, and outer cylinder front end optical window 10 is aimed at cradle laser hole 19, cradle power lead 20 joins with power supply then; Realize photoelectric cell 12 chargings, carry out the work of laser charging for the capacitive pressure tester thereby accomplished.The optic fibre wire 17 of the synchronous triggering that this is routine is many capacitive pressure testers unified optic fibre wires that adopted of base when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, and the urceolus 3 rear end optical windows 15 that this optic fibre wire 17 passes on inner core back segment 1 terminal surface are arranged on outside this capacitor casing 3 with screw plug 16 with holes.One end of this routine optic fibre wire 17 connects and the light-operated switch of the power module 24 of the metering circuit 13 of control capacitance device 21, the conversion of this light-operated switch control capacitance formula pressure tester between from the dormant state to the duty.Design makes the capacitive pressure tester become the testing tool of low-power consumption like this.The optic fibre wire signal passing time that is adopted is pressed passing time much smaller than combustion, and base is unified when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, makes many capacitive pressure tester synchronism detection precision high.The data of gathering are through the infrared data transmission of carrying out, and this transport sector is by memory circuit 25, coding circuit, the infrared transceiver of this tester, and the infrared transceiver of receiving end, demoder, interface circuit 28, computing machine 26 are formed.During the transmission data; The capacitive pressure tester makes zero the binary data of storing and is sent out by infrared transceiver through in-line coding; The transceiver of receiving end sends to the HSDL-7001 codec with the NRZ data that receive, and decoded data are sent to data on the computing machine 26 through USB2.0 interface 28.Adopt high-speed, low-power consumption, anti-interference optical fiber synchronous triggering transmission technology; Guarantee the real-time Transmission of detecting information; Being implemented in the real-time testing of electromagnetic screen downforce information, processing in real time and storage, real-time Transmission and reception in real time etc., is the new ideas method of testing of integrated, the dynamic test that combines of multiple hi-tech.Fig. 5 illustrates the pressure test of capacitive pressure tester and uses synoptic diagram, and wherein: the cannon inner structure mainly contains: breech block 35, propellant 36, cartridge case 37, bullet 38, gun tube 39.A plurality of capacitive pressure tester 40 built-in being distributed in the propellant 36, what connect them is the multifiber lead 17 of control synchronous triggering.During test cannon gun pressure; Capacitive pressure tester provided by the invention is placed in the cartridge case 37; The triggering optical fiber 17 of these tester urceolus 3 rear ends is guided to lighting-up tuyere, and when firing shells igniting, the light trigger pip that optical fiber 17 will be received passes to metering circuit 13; After metering circuit 13 was received the light pulse trigger pip, metering circuit 13 started the back and gets into collection and processing and the storage that duty is waited for the arrival of pressure signal (this signal is the induced signal that sensor 21 produces) and accomplished signal.In with a plurality of tester simultaneous time test explosive fields provided by the invention during the pressure of difference; Earlier a plurality of capacitive pressure testers are placed on the diverse location in the cartridge case 37; The triggering optical fiber 17 of each capacitive pressure tester urceolus 3 rear end is all guided near the lighting-up tuyere; When the cannon igniting fires shells, after the triggering optical fiber 17 of urceolus 3 rear ends of all manographs is received the light trigger pip, be transferred to metering circuit 13; After metering circuit 13 receives the light pulse trigger pip, will start the entering duty.Because transmitting the time ratio combustion of signal, optical fiber press passing time to be much smaller; So the tester of diverse location all can receive trigger pip in the explosive field before combustion is pressed onto; Realize the synchronous startup of a plurality of testers, guaranteed the unification of base when a plurality of testers are tested and the collection and the storage of data.Because test explosive field internal pressure belongs to the test of single press process; So the sensor of being made up of as presser sensor face and the syllogic inner core in it sealing tubular metal outer cylinder 3 21 receives the variation of gun pressure; Cause the variation of urceolus 3 stress; Thereby cause that deformation takes place urceolus 3; Distance between urceolus 3 and the inner core 4 changes, and respective change just takes place the sensor values that both constituted, and the signal that changes through 13 pairs of signs of the metering circuit gun pressure that is connected in sensor 21 is then changed, handles, stored.The pressure signal curve negotiating USB translation interface 28 that collects is transferred to host computer 26 and on host computer 26, shows.This routine capacitive pressure tester serves as main formation with a testing capacitor; This capacitive pressure tester has anti-interference, the technical characterstics such as light charges, light triggering measurement, fiber optic data communication, circuit embedding curing of betal can electromagnetic screen of testing capacitor, is the microminiature capacity-type electronic pressure tester that explosion-proof essential safe type exempts to tear open.This capacitive pressure tester measurement range can reach 0～800MPa, and the measurement range of its electric capacity is 0～5pF, and its volume is not more than 12cm
3Can know that according to above-mentioned a series of technical indicators this routine capacitive pressure tester is essential safe type, explosion-proof type, microminiature, low-power consumption, exempt from the electron pressure tester of the small capacitance of dismounting.
Claims (9)
1. capacitive pressure tester; Be characterised in that: the movable plate electrode, syllogic inner core and the movable plate electrode urceolus coaxial cable that adopt the tubular metal shell urceolus of being with fillet to make capacitor are equipped with in urceolus; Select the stage casing of inner core to make the fixed plate of capacitor; The metering circuit of this capacitor is set in the fixed plate; Be provided with the light charge power supply in the leading portion of syllogic inner core, be provided with the optic fibre wire of synchronous triggering in the back segment of syllogic inner core, an end of optic fibre wire connect and control the light-operated switch of this capacitor measurement circuit, the other end of optic fibre wire is arranged on outside this capacitor casing.
2. capacitive pressure tester according to claim 1 is characterised in that: the tubular metal shell of said band fillet selects for use martensite actual effect steel bomb property metal material to manufacture, and the metal material that described inner core is selected for use is a red copper.
3. capacitive pressure tester according to claim 1; Be characterised in that: the light charge power supply that is provided with in the leading portion of described inner core is laser charge power supply a--silicon photocell; The front end face of inner core leading portion is offered the charging light window; Between light window and silicon photocell, be provided with the fixing scattering of optical cement and mould sheet, the atresia screw plug of protection optical window is set outside light window.
4. capacitive pressure tester according to claim 1; Be characterised in that: the optic fibre wire of described synchronous triggering is many capacitive pressure testers unified optic fibre wires that adopted of base when realizing light-operated synchronous startup, optical fiber synchronous triggering, optical fiber high-speed transfer, test, and the screw plug with holes that this optic fibre wire passes on the inner core back segment terminal surface is arranged on outside this capacitor casing.
5. capacitive pressure tester according to claim 1 and 2 is characterised in that:
A. described syllogic inner core is divided into three sections by the size positions that designs, and two sections outer end becomes interference fit with the step place at urceolus both ends respectively before and after it, and forms commonly with urceolus and to hold;
B. the stage casing of described inner core is as the fixed pole of capacitor, and two sections conducts weaken the protection ring that edge effect influences before and after it;
C. described martensite actual effect steel is processed into the urceolus of full-closed structure, and urceolus ground connection becomes the shielding case that effective shielding external electromagnetic waves causes interference during use.
6. capacitive pressure tester according to claim 1 is characterised in that: the metering circuit that this capacitor is set in the described fixed plate adopts the casting glue embedding to be solidified into circuit body earlier, after putting into the inner core stage casing, uses the embedding of wax secondary again.
7. capacitive pressure tester according to claim 1; Be characterised in that: the metering circuit of described this capacitive pressure tester includes: transition low capacitance measurement circuit, signal conditioning circuit and memory circuit, wherein the capacitor of urceolus, inner core stage casing formation is the capacitance pressure transducer, that transition low capacitance measurement circuit information is gathered or measured.
8. capacitive pressure tester according to claim 1 is characterised in that:
A. an end of described optic fibre wire connects and controls the light-operated switch of the power management module of this capacitor measurement circuit, the conversion of this light-operated switch control capacitance formula pressure tester between from the dormant state to the duty;
The data of b. gathering are through infrared transmission, and this transport sector is by memory circuit, coding circuit, the infrared transceiver of this tester, and the infrared transceiver of receiving end, demoder, interface circuit, computing machine are formed.
9. capacitive pressure tester according to claim 1; It is characterized in that: described this capacitive pressure tester is the microminiature capacity-type electronic pressure tester that light charging, light trigger and measures, the explosion-proof essential safe type of fiber optic data communication exempts to tear open; This capacitive pressure tester measurement range can reach 0～800MPa; The measurement range of its electric capacity is 0～5pF, and its volume is not more than 12cm
3
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| CN201210016296.7A CN102539049B (en) | 2012-01-16 | 2012-01-16 | Capacitance pressure tester |
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| CN201210016296.7A CN102539049B (en) | 2012-01-16 | 2012-01-16 | Capacitance pressure tester |
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| CN109490674A (en) * | 2018-12-27 | 2019-03-19 | 艾威姆（天津）电气有限公司 | A kind of electric system compensation capacitor integrated test system |
| WO2021017003A1 (en) * | 2019-08-01 | 2021-02-04 | 深圳市汇顶科技股份有限公司 | Capacitance measurement circuit, touch detection apparatus, and electronic device |
| CN112601966A (en) * | 2019-08-01 | 2021-04-02 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit, touch detection device, and electronic apparatus |
| EP3798645A4 (en) * | 2019-08-01 | 2021-04-28 | Shenzhen Goodix Technology Co., Ltd. | Capacitance measurement circuit, touch detection apparatus, and electronic device |
| CN112601966B (en) * | 2019-08-01 | 2022-09-13 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit, touch detection device, and electronic apparatus |
| US11481072B2 (en) | 2019-08-01 | 2022-10-25 | Shenzhen GOODIX Technology Co., Ltd. | Capacitance detection circuit, touch detection apparatus and electronic device |
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