CN104155045B - Built-in pressure tester - Google Patents
Built-in pressure tester Download PDFInfo
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- CN104155045B CN104155045B CN201410372684.8A CN201410372684A CN104155045B CN 104155045 B CN104155045 B CN 104155045B CN 201410372684 A CN201410372684 A CN 201410372684A CN 104155045 B CN104155045 B CN 104155045B
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- urceolus
- protecting cover
- cover
- inner core
- pressure tester
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Abstract
nullThe built-in pressure tester of the present invention belongs to technical field of pressure detection，This tester has housing and test circuit,The coil of urceolus and inwall constitutes four bridge-type capacitance signal inputs with the coil of inner core and outer wall，Its test circuit couples inner/outer tube respectively and is placed in inner core，Upper end cover is used to make inner/outer tube be integrally togather up and down with upper protecting cover and bottom end cover with lower protecting cover，Form that instrument is built-in is hedged off from the outer world、Exempt extraneous harmful interference、The instrument keeping test high end performance seals structure，Advantage has: its urceolus itself makees capacitance electrode ground connection，Can protection circuit，Use screwless to contact end face between urceolus with end cap up and down and filling gel seals，Avoid discontinuity，Improve the precision of tester，The test circuit of four bridge legs is formed by being wrapped in the coil of inner/outer tube，It is effectively improved and exempts interference in the presence of a harsh environment，Keep the ability of test high end performance，This built-in pressure tester is worth using and promoting.
Description
Technical field
Built-in pressure tester disclosed by the invention belongs to technical field of pressure detection, is specifically related to a kind of closed protective
Jamproof built-in pressure tester.
Background technology
Built-in pressure tester is to be suitable in explosive field pressure (such as electrothermal chemical gun breech pressure, bullet bottom pressure, cannon
Pneumatics power etc. penetrated by breech pressure, oil well) instrument tested, it is adaptable to there is in powder burning region the Special Ring of high temperature, high pressure
Transient pressure test environment is carried out under border.As cannon breech pressure test environment has following characteristics, pressure, temperature and the fire in thorax
The granule that explosive fires all acts directly on the outer surface of test system, and the instantaneous pressure of test environment can reach GPa level, temperature
Degree reaches 3000 DEG C.This environment is higher to the requirement of test system, owing to test system needs to put in test environment, so surveying
Test system strictly to control on system power dissipation and overall structure.In a word, the test environment in explosive field is exceedingly the most odious, not only
Require built-in pressure tester HI high impact high temperature resistant, anti-vibration, adapt to high and low temperature environment, require built-in stress test simultaneously
Instrument has the features such as micro volume, low-power consumption, high reliability, high accuracy.Therefore, the specification for built-in pressure tester is wanted
Summation overall structure is desirable that strictly, and particularly the closed protective Anti-Jamming Technique of pressure tester, more requires harshness.Airtight want
Ask the isolation completely between pressure measurement instrument outside and inside, it is impossible to allow the test environment in the external world that internals to be interfered, anti-
Protecting, require that pressure measurement instrument entirety can adapt to the adverse circumstances of test, the performance keeping high-end is not affected.
Summary of the invention
It is an object of the invention to: provide the jamproof built-in pressure tester of this closed protective to society.
The technical scheme is that such: this built-in pressure tester, include housing and interior test thereof
Circuit, specifically has: urceolus, inner core, upper end cover, bottom end cover, upper protecting cover, lower protecting cover, tests circuit, be wrapped in outer tube inner wall top
Coil, be wrapped in the coil of inner tank theca bottom, technical characterstic is: the urceolus of described built-in pressure tester and
The coil of upper inside wall constitutes bridge-type capacitance signal input with the coil of inner core and outer wall bottom, and its test circuit joins respectively
Connect inner/outer tube to be placed in inner core, use upper end cover to make inner/outer tube couple one up and down with upper protecting cover and bottom end cover with lower protecting cover
Body, forms the instrument sealing structure of instrument built-in be hedged off from the outer world, exempt extraneous harmful interference, holding test high end performance.Institute
The pressure tester stated formed instrument built-in be hedged off from the outer world be because the housing (urceolus) of pressure tester be one four careful
The conductor closed, enclosure interior is a hollow thin cylinder (inner core).In radial directions, at inner/outer tube two ends, by up and down
Tight connecting device inside end cap lid and between inner/outer tube, closely cooperates between making inside inner core, urceolus and upper and lower end cap lid,
And serve the effect of shielding and insulation.In the axial direction, compress with upper and lower end cap respectively with upper and lower protecting cover, reach and inner core
Insulation is tightly fastened the effect being connected with urceolus.Test circuit, battery etc. are all put in cylindrical inner core.Urceolus is owing to being subject to
Pressure deforms upon, and inner core will not deform upon.Described release external world harmful interference, keeps the instrument of test high end performance
Seal structure and be because that the urceolus of this structure can bear instantaneous superhigh-temperature and-pressure, anti-HI high impact vibration, shielding electromagnetism are done
Disturbing, inner core and internal composition thereof also will not be affected, i.e. this pressure tester can be at intense radiation, high-intensity magnetic field, high pressure
Working in the rugged environment such as power and high/low temperature, can bear the biggest variations in temperature, anti-electromagnetic interference capability is strong, can be to band
Magnetic workpiece measures.
Built-in pressure tester in accordance with the above, technical characterstic also has: the inner core described in a. is coaxially set with
In urceolus, the upper end anchor ring upper and lower end anchor ring of urceolus is respectively arranged with spill annular groove, at the lid of upper end cover
It is provided with respectively on inside the lid of the upper and lower end cap in the inside and setting on the upper end anchor ring upper and lower end anchor ring of urceolus
The circular fin of coaxial line that the mutual size of spill annular groove is the most supporting, inside the lid of upper end cover in the lid of upper and lower end cap
The upper end anchor ring end face with inner core and the most supporting coaxial of the lower end mutual size of anchor ring end face it is provided with respectively on face
The lid of line spill annular groove, the spill annular groove that the upper end anchor ring upper and lower end anchor ring of urceolus is respectively provided with and upper end cover
Between the circular fin being respectively provided with on inside the lid of the upper and lower end cap in the inside, the mutually tight supporting mutual embedding of size is installed even
Connect integrally, inside the lid of the upper end anchor ring end face of inner core and lower end anchor ring end face and upper end cover inside the lid of upper and lower end cap
On between the spill annular groove that is respectively provided with the mutually tight supporting mutual embedding installation of size be integrally connected, form pressure tester
Inside and outside that completely cut off, release interference, the instrument sealing structure of holding test high end performance of first.Inside and outside this described first
Isolation, exempt interference, keep the instrument of test high end performance to seal inside and outside structure having completely cut off instantaneous superhigh-temperature and-pressure, height
Impact shock, eliminates electromagnetic interference.B. described upper protecting cover and the centre of lower protecting cover are all provided with being set to round mouth shape, described
The centre of upper end cover and bottom end cover is outwards all provided with being set to evagination circle platform, on outer dome platform on upper end cover and upper protecting cover
The round mouth coaxially mutually tight supporting mutual embedding installation of size be integrally connected, the outer dome platform on same bottom end cover and
The coaxially mutually tight supporting mutual embedding installation of size of round mouth on lower protecting cover is integrally connected, at upper protecting cover bottom inwall
Being provided with helicitic texture with lower protecting cover upper end inwall, the outer wall upper and lower end parts at urceolus is provided with helicitic texture, urceolus
Outer wall upper and lower end parts helicitic texture respectively with the helicitic texture of upper protecting cover bottom inwall and lower protecting cover upper end inwall with
Axis ground forms tight thread attachment structure, when under the helicitic texture compact siro spinning technology one, urceolus of urceolus upper end and upper protecting cover
During the helicitic texture compact siro spinning technology one of end and lower protecting cover, between inner/outer tube upper end and upper end cover and upper protecting cover, inner/outer tube
More tight seal, the inside and outside isolation of second of formation pressure tester, release between bottom and bottom end cover and lower protecting cover
Interference, holding test high end performance instrument sealing structure.Inside and outside that completely cut off, release interference, the holding of described second
The instrument of test high end performance seals the instantaneous superhigh-temperature and-pressure of the inside and outside isolation of structure, HI high impact vibration, eliminates electromagnetic interference.
Built-in pressure tester in accordance with the above, technical characterstic also has: the inner core described in a. is a thin cylinder,
Selecting material is No. 45 steel, and inner core couples the anode of the test circuit being placed in inner core as electric capacity anelectrode.Described this 45
Number steel is high-quality carbon element structural steel, has higher intensity and preferable machinability.Described urceolus is high intensity circle
Cylinder shell, selecting material is 18Ni Maraging steel, and urceolus is placed in the test circuit of inner core as the connection of electric capacity negative electrode
Negative terminal i.e. end, and as the electromagnetic shielding shell of pressure tester, be also the inside and outside isolation of this pressure tester, exempt interference
, keep test high end performance instrument seal structure a part.Described this 18Ni Maraging steel is with carbon-free
(or micro-carbon) martensite is matrix, the one formed by electro ultrafiltration strengthening between the metal ion of some alloying element ageing generation
High strength steel, its yield limit, up to 2000MPa, has higher intensity and excellent toughness.B. the upper end cover described in, lower end
Lid, upper protecting cover, lower protecting cover all select material to be 18Ni Maraging steel.Described upper end cover, bottom end cover, upper protecting cover, under protect
Lid all forms tight seal with urceolus and electrically connects structure.Described upper end cover, bottom end cover, upper protecting cover, lower protecting cover are all and outer cylindrical
Becoming tight seal electrically connect structure and collectively form the electromagnetic shielding shell that this instrument is tight, this structure can make effectively
Tester bears instantaneous superhigh-temperature and-pressure, anti-HI high impact vibration, shielding electromagnetic interference.Described inner core upper and lower annulus end face divides
Coaxial line spill annular groove on not inside end cap lid upper and lower with inside upper end cover lid forms electric insulation tight seal and couples knot
Structure.The concrete structure that described this electric insulation tight seal couples is: on inside the lid of the upper end cover of tester and lower end
Spill annular groove on inside the lid of lid all scribbles insullac, these spill annular groove insullac and inner core upper and lower side annulus end face
Form the tight leakproof fit electric insulation tight seal of mutual size to couple.This also inside and outside completely cut off, release of pressure tester
A part for interference, holding test high end performance instrument sealing structure.
Built-in pressure tester in accordance with the above, technical characterstic also has: described inner core bottom outer wall and urceolus
The coil that upper inside wall is wound around selects to use Rogowski flexible coil；The described flexible wires being wrapped in outer tube inner wall upper end
Circle forms fixed capacity with urceolus respectively and inner core forms variable capacitance, the described flexible wires being wrapped in inner tank theca lower end
Circle forms variable capacitance respectively with urceolus and inner core forms fixed capacity, and four described electric capacity form the electric bridge of four brachium pontis
Circuit, this bridge circuit is as the bridge-type capacitance signal input of pressure tester.The bridge circuit configuration of these four brachium pontis please
See the Figure of description 2 of the present invention.
Built-in pressure tester in accordance with the above, detailed technology feature also has: the electric bridge of four described brachium pontis
Circuit is transient state single charge-discharge test circuit, and this test circuit produces electricity by four capacitance voltage changes are the most equal in circuit
Pressure difference signal couples amplifying circuit as the bridge-type capacitance signal input of pressure tester, this input, and amplifying circuit couples
A/D change-over circuit, A/D change-over circuit couples storage circuit.The bridge circuit of four brachium pontis of the present invention only needs transient state once to fill
Discharge process can complete sampling and test process.
Built-in method for testing pressure in accordance with the above, detailed technology feature also has: the pressure tester described in a.
Power circuit is constant pressure source power circuit, and it is main composition that this constant pressure source power circuit selects to use operation amplifier chip OPA340,
Meet design requirement based on low-power consumption.The amplifying circuit of b. described pressure tester selects the instrument using energy dormancy energy-conservation
Amplification chip INA331 is main composition, meets the low-power consumption requirement of described built-in pressure tester.
The built-in pressure tester advantage of the present invention has: 1. the urceolus of this built-in pressure tester inherently pressure
Sensing element, for protection circuit and as the sensitive electrode of capacitor；2. use between this tester housing and upper and lower end cap
Screwless end face seal, it is to avoid the instrument caused because of screw thread is by discontinuity problem during gun pressure, thus carries
The precision of this tester high, and save the space taken because of screw thread, thus reduce the volume of instrument；3. this tester shell
The outer ring surface filling gel of the contact ring between body and up and down end cap, the connection between rugged housing and up and down end cap, reach more
Good obturation effect；4. four electric capacity formed by the inner/outer tube of tester and the flexible coil being wound around in the above constitute four
The bridge circuit of individual brachium pontis, is effectively increased tester as test circuit and exempts interference in the presence of a harsh environment, keep test height
The ability of end performance.This built-in pressure tester is worth using and promoting.
Accompanying drawing explanation
The Figure of description of the present invention has 4 width:
Fig. 1 is built-in pressure tester entity structure schematic diagram；
Fig. 2 is bridge-type tiny capacitance circuit theory diagrams；
Fig. 3 is constant voltage power supply circuit figure；
Fig. 4 is amplification circuit diagram.
Have employed generic reference numeral in the various figures, the most same object uses same label in the various figures.In the various figures: 1. protect on
Lid；2. upper end cover；3. urceolus；4. inner core；5. bottom end cover；6. descend protecting cover；7. it is wrapped in the flexible coil of outer tube inner wall upper end；8.
It is wrapped in the flexible coil of inner tank theca lower end；9. test circuit；10. constant pressure source；11. input voltages；12. output voltage letters
Number；13. instrument amplification chips；OPA340 is operation amplifier chip；INA331 is instrument amplification chip；R1～R6It is all resistance；C1
～C6It is all electric capacity；S1～S2It it is all switch；Ui is input voltage；Uo is output voltage.
Detailed description of the invention
The built-in pressure tester non-limiting examples of the present invention is as follows:
Embodiment one. built-in pressure tester
This built-in pressure tester of this example includes housing and interior test circuit thereof, concrete structure by Fig. 1～
Fig. 4 combines and illustrates, Fig. 1 is built-in pressure tester entity structure schematic diagram, in FIG: 1 is upper protecting cover, and 2 is upper end cover, and 3
Being urceolus, 4 is inner core, and 5 is bottom end cover, and 6 is lower protecting cover, and 7 are wound around the flexible coil of outer tube inner wall upper end, and 8 are wound around
The flexible coil of inner tank theca lower end, 9 is test circuit.The urceolus 3 of the built-in pressure tester of this example and upper inside wall
The coil 8 of coil 7 and inner core 4 and outer wall bottom constitute condenser type signal input part, inside and outside its test circuit 9 couples respectively
Cylinder is placed in inner core 4, uses upper end cover 2 to make inner/outer tube be integrally togather up and down with upper protecting cover 1 and bottom end cover 5 with lower protecting cover 6,
Form the instrument sealing structure of instrument built-in be hedged off from the outer world, exempt extraneous harmful interference, holding test high end performance.This example
Pressure tester forms that instrument is built-in is hedged off from the outer world that to be because the housing (urceolus 3) of pressure tester be that a surrounding is airtight
Conductor, enclosure interior is a hollow thin cylinder (inner core 4).In radial directions, at inner/outer tube two ends, by upper and lower end cap
Tight connecting device inside lid and between inner/outer tube, closely cooperates between making inside inner core 4, urceolus 3 and upper and lower end cap lid, and
Serve the effect of shielding and insulation.In the axial direction, compress with upper and lower end cap respectively with upper and lower protecting cover, reach and inner core 4
Insulation is tightly fastened, with urceolus 3, the effect being connected.Test circuit 9, battery etc. are all put in cylindrical inner core 4.Urceolus 3 due to
It is under pressure and deforms upon, and inner core 4 will not deform upon.Described release external world harmful interference, keeps test high end performance
Instrument seal structure and be because the urceolus 3 of this structure and can bear instantaneous superhigh-temperature and-pressure, anti-HI high impact vibration, shielding
Electromagnetic interference, inner core 4 and internal composition thereof also will not be affected, i.e. this pressure tester can be at intense radiation, Qiang Ci
Working in the rugged environments such as field, high pressure and high/low temperature, can bear the biggest variations in temperature, anti-electromagnetic interference capability is strong,
Band magnetic workpiece can be measured.Inner core 4 and the urceolus 3 of this example are coaxially sleeved in urceolus 3, in the upper end of urceolus 3
It is respectively arranged with spill annular groove, inside the lid of upper end cover 2 in the lid of upper and lower end cap 5 on anchor ring upper and lower end anchor ring
It is provided with tight with the mutual size of spill annular groove of setting on the upper end anchor ring upper and lower end anchor ring of urceolus 3 on face respectively
The close circular fin of supporting coaxial line, inside the lid of upper end cover 2 inside the lid of upper and lower end cap 5 on be provided with respectively with
The upper end anchor ring end face of inner core 4 and the most supporting coaxial line spill annular groove of the lower end mutual size of anchor ring end face, urceolus 3
Upper end anchor ring upper and lower end anchor ring on upper and lower end cap 5 inside the spill annular groove that is respectively provided with and the lid of upper end cover 2
Lid inside between the circular fin that is respectively provided with the mutually tight supporting mutual embedding installation of size be integrally connected, inner core 4
Inside upper end anchor ring end face and lower end anchor ring end face and the lid of upper end cover 2 inside the lid of upper and lower end cap 5 on be respectively provided with
Spill annular groove between the mutually tight supporting mutual embedding installation of size be integrally connected, formed in the first of this pressure tester
Outer isolation, release interference, holding test high end performance instrument sealing structure.The inside and outside isolation of this first of this example,
Exempt interference, keep the instrument of test high end performance to seal inside and outside structure having completely cut off instantaneous superhigh-temperature and-pressure, HI high impact to shake
Dynamic, eliminate electromagnetic interference.The upper protecting cover 1 of this example and the centre of lower protecting cover 6 are all provided with being set to round mouth shape, the upper end cover of this example
2 and the centre of bottom end cover 5 be outwards all provided with being set to evagination circle platform, on outer dome platform on upper end cover 2 and upper protecting cover 1
The round mouth coaxially mutually tight supporting mutual embedding installation of size is integrally connected, the outer dome platform on same bottom end cover 5 and
The coaxially mutually tight supporting mutual embedding installation of size of round mouth on lower protecting cover 6 is integrally connected, in upper protecting cover 1 bottom
Wall and lower protecting cover 6 upper end inwall are provided with helicitic texture, and the outer wall upper and lower end parts at urceolus 3 is provided with helicitic texture,
The helicitic texture of the outer wall upper and lower end parts of urceolus 3 respectively with upper protecting cover 1 bottom inwall and the screw thread of lower protecting cover 6 upper end inwall
Structure coaxially forms tight thread attachment structure, when the helicitic texture compact siro spinning technology one of urceolus 3 upper end and upper protecting cover 1
During the helicitic texture compact siro spinning technology one of body, urceolus 3 bottom and lower protecting cover 6, inner/outer tube upper end and upper end cover 2 and upper protecting cover
More tight seal between 1, between inner/outer tube bottom and bottom end cover 5 and lower protecting cover 6, forms the second of this pressure tester
Inside and outside that completely cut off, release interference, the instrument sealing structure of holding test high end performance.The inside and outside isolation of the second of this example,
Exempt the instantaneous superhigh-temperature and-pressure of interference, the holding test high end performance instrument inside and outside isolation of sealing structure, HI high impact is vibrated,
Eliminate electromagnetic interference.The inner core 4 of this example is a thin cylinder, and selecting material is No. 45 steel, and inner core 4 joins as electric capacity anelectrode
Connect and be placed in the anode testing circuit in inner core 4.This No. 45 steel of this example are high-quality carbon element structural steel, have higher intensity
With preferable machinability.The urceolus 3 of this example is high intensity circular cylindrical shell, and selecting material is 18Ni Maraging steel, outward
Cylinder 3 couples the negative terminal of the test circuit being placed in inner core 3 and i.e. holds as electric capacity negative electrode, and as the electromagnetism of this pressure tester
Shield shell is also the inside and outside isolation of this pressure tester, it is that disturb to exempt, keep the instrument of test high end performance to seal structure
A part.Described this 18Ni Maraging steel is as matrix with carbon-free (or micro-carbon) martensite, by some alloy unit
A kind of high strength steel that between the metal ion of element ageing generation, electro ultrafiltration strengthening is formed, its yield limit is up to 2000MPa, tool
There are higher intensity and excellent toughness.The upper end cover 2 of this example, bottom end cover 5, upper protecting cover 1, lower protecting cover 6 all select the material to be
18Ni Maraging steel.The upper end cover 2 of this example, bottom end cover 5, upper protecting cover 1, lower protecting cover 6 all form tight seal electricity with urceolus 3
Draw bail.The upper end cover 2 of this example, bottom end cover 5, upper protecting cover 1, lower protecting cover 6 all form tight seal with urceolus 3 and electrically connect structure
And being collectively forming the electromagnetic shielding shell that this instrument is tight, this structure can make tester bear instantaneous superelevation effectively
Temperature high pressure, anti-HI high impact vibration, shielding electromagnetic interference.Inner core about the 4 annulus end face of this example respectively with upper end cover 2 lid inside on
Electric insulation tight seal draw bail is formed with the coaxial line spill annular groove on inside bottom end cover 5 lid.This electricity of this example is exhausted
The concrete structure that edge tight seal couples is: recessed on inside the lid of the upper end cover 2 of tester and inside the lid of bottom end cover 5
Shape annular groove all scribbles insullac, and it is tight that these spill annular groove insullac and inner core 4 upper and lower side annulus end face form mutual size
Leakproof fit electric insulation tight seal couples.This also the inside and outside isolation of this pressure tester, exempt interference, keep surveying
The instrument of examination high end performance seals a part for structure.The coil that the inner core 4 bottom outer wall of this example and urceolus 3 upper inside wall are wound around
Select to use Rogowski flexible coil.The flexible coil being wrapped in urceolus 3 inwall upper end of this example is formed with urceolus 3 respectively
Fixed capacity and inner core 4 form variable capacitance, the flexible coil being wrapped in inner core 4 outer wall lower end of this example respectively with urceolus 3 shape
Becoming variable capacitance and inner core 4 to form fixed capacity, these described four electric capacity form the bridge circuit of four brachium pontis, this electric bridge
Circuit is as the bridge-type capacitance signal input of this pressure tester.The bridge circuit of four brachium pontis of this example is that transient state single fills
Discharge test circuit, this test circuit changes the most equal generation voltage differential signal as this pressure by four capacitance voltages in circuit
The bridge-type capacitance signal input of force tester, this input couples amplifying circuit, and amplifying circuit couples A/D change-over circuit, A/D
Change-over circuit couples storage circuit.The bridge circuit of four brachium pontis of the present invention only needs charge and discharge process of transient state to complete
Sampling and test process.The bridge circuit configuration of four brachium pontis of this example refers to the Figure of description 2 of the present invention.Fig. 2 illustrates
Bridge-type tiny capacitance circuit theory diagrams, in fig. 2: 10 is constant pressure source, 11 is input voltage, and 12 is output voltage signal,
13 is amplifying circuit.The pressure tester power circuit of this example is constant pressure source power circuit, and this constant pressure source power circuit selects to adopt
Being main composition with operation amplifier chip OPA340, meet design requirement based on low-power consumption, wherein 10 in Fig. 2 are i.e. that Fig. 3 shows
The constant voltage power supply circuit gone out.The amplifying circuit of the pressure tester of this example selects the instrument amplification chip using energy dormancy energy-conservation
INA331 is main composition, meets the low-power consumption requirement of described built-in pressure tester.In Fig. 2 13 are i.e. shown in Fig. 4
Amplifying circuit.This example use urceolus, inner core, upper end cover, bottom end cover, upper protecting cover, the physical dimension of lower protecting cover, test circuit and
Depending on the selection of its material such as coil turn, circuit chip all should be designed calculating according to test purpose, needs, it is also may pass through
Verification experimental verification is perfect.
Embodiment two. built-in pressure tester
The built-in pressure tester concrete structure of this example can be combined with Fig. 1～Fig. 4 etc. and illustrated, the built-in pressure of this example
Tester has with the built-in pressure tester difference of embodiment one: the measuring circuit of the built-in pressure tester of this example
Use known and commercially electronic devices and components to assemble to make, as long as all can using of the function of measuring circuit can be realized.This example
Remaining is not described for built-in pressure tester, is congruent with, described in embodiment one, no longer repeating.
Claims (6)
1. a built-in pressure tester, includes housing and interior test circuit thereof, specifically has: urceolus, inner core, upper end
Lid, bottom end cover, upper protecting cover, lower protecting cover, test circuit, be wrapped in the coil on outer tube inner wall top, be wrapped in inner tank theca bottom
Coil, be characterised by: the urceolus of described built-in pressure tester and the coil of upper inside wall and inner core and outer wall
The coil of bottom constitutes bridge-type capacitance signal input, and its test circuit couples inner/outer tube respectively and is placed in inner core, in employing
End cap makes inner/outer tube be integrally togather up and down with upper protecting cover and bottom end cover with lower protecting cover, forms instrument and built-in is hedged off from the outer world, exempts from
Except boundary's harmful interference, keep test high end performance instrument seal structure.
Built-in pressure tester the most according to claim 1, is characterised by:
A. described inner core is coaxially sleeved in urceolus, sets respectively on the upper end anchor ring upper and lower end anchor ring of urceolus
Be equipped with spill annular groove, inside the lid of upper end cover inside the lid of upper and lower end cap on be provided with the upper end with urceolus respectively
The circular fin of coaxial line that on anchor ring upper and lower end anchor ring, the mutual size of spill annular groove of setting is the most supporting,
Inside the lid of upper end cover inside the lid of upper and lower end cap on be provided with respectively the upper end anchor ring end face with inner core and lower end circle
The coaxial line spill annular groove that the mutual size of anchor ring end face is the most supporting, the upper end anchor ring upper and lower end anchor ring of urceolus divides
Inside the spill annular groove not arranged and the lid of upper end cover inside the lid of upper and lower end cap between the circular fin that is respectively provided with
The mutually tight supporting mutual embedding installation of size is integrally connected, and the upper end anchor ring end face of inner core and lower end anchor ring end face are with upper
Inside the lid of end cap inside the lid of upper and lower end cap between the spill annular groove that is respectively provided with mutually size tight supporting the most embedding
Enter installation to be integrally connected, the inside and outside isolation of first of formation pressure tester, release interference, holding test high end performance
Instrument seals structure；
B. described upper protecting cover and the centre of lower protecting cover are all provided with being set to round mouth shape, described upper end cover and the center of bottom end cover
Position is outwards all provided with being set to evagination circle platform, the outer dome platform on upper end cover and the round mouth on upper protecting cover coaxially mutual chi
Very little tight supporting mutual embedding installation is integrally connected, the outer dome platform on same bottom end cover and the round mouth coaxial line on lower protecting cover
The ground mutually tight supporting mutual embedding installation of size is integrally connected, equal at upper protecting cover bottom inwall and lower protecting cover upper end inwall
Being provided with helicitic texture, the outer wall upper and lower end parts at urceolus is provided with helicitic texture, the screw thread of the outer wall upper and lower end parts of urceolus
Structure helicitic texture with upper protecting cover bottom inwall and lower protecting cover upper end inwall respectively coaxially forms tight thread even
Access node structure, when the screw thread knot of helicitic texture compact siro spinning technology one, urceolus bottom and the lower protecting cover of urceolus upper end and upper protecting cover
During structure compact siro spinning technology one, between inner/outer tube upper end and upper end cover and upper protecting cover, inner/outer tube bottom and bottom end cover with under protect
More tight seal between lid, formed pressure tester the inside and outside isolation of second, exempt interference, keep testing high-end property
The instrument of energy seals structure.
Built-in pressure tester the most according to claim 2, is characterised by:
A. described inner core is a thin cylinder, and selecting material is No. 45 steel, and inner core is placed in inner core as the connection of electric capacity anelectrode
Test circuit anode；Described urceolus is high intensity circular cylindrical shell, and selecting material is 18Ni Maraging steel, and urceolus is made
The negative terminal coupling the test circuit being placed in inner core for electric capacity negative electrode i.e. is held, and as the electromagnetic shielding shell of this pressure tester
Body is also the inside and outside isolation of pressure tester, exempt instrument that disturb, holding test high end performance seals one of structure
Point；
B. the upper end cover described in, bottom end cover, upper protecting cover, lower protecting cover all select material to be 18Ni Maraging steel；Described is upper
End cap, bottom end cover, upper protecting cover, lower protecting cover all form tight seal with urceolus and electrically connect structure；Described inner core upper and lower annulus end
Face respectively with upper end cover lid inside inside upper and lower end cap lid on coaxial line spill annular groove form electric insulation tight seal connection
Access node structure.
Built-in pressure tester the most according to claim 3, is characterised by: on described inner core bottom outer wall and urceolus
The coil that portion's inwall is wound around selects to use Rogowski flexible coil；The described flexible coil being wrapped in outer tube inner wall upper end
Form fixed capacity with urceolus respectively and inner core forms variable capacitance, the described flexible coil being wrapped in inner tank theca lower end
Forming variable capacitance respectively with urceolus and inner core forms fixed capacity, four described electric capacity form the electric bridge electricity of four brachium pontis
Road, this bridge circuit is as the bridge-type capacitance signal input of pressure tester.
Built-in pressure tester the most according to claim 4, is characterised by: the bridge circuit of four described brachium pontis is
Transient state single charge-discharge test circuit, this test circuit changes the most equal generation voltage difference by four capacitance voltages in circuit to be believed
Number as the bridge-type capacitance signal input of pressure tester, this input couples amplifying circuit, and amplifying circuit couples A/D conversion
Circuit, A/D change-over circuit couples storage circuit.
Built-in pressure tester the most according to claim 5, is characterised by:
A. described this pressure tester power circuit is constant pressure source power circuit, and this constant pressure source power circuit selects to use computing
Amplification chip OPA340 is main composition；
The amplifying circuit of this b. described pressure tester selects the instrument amplification chip INA331 using energy dormancy energy-conservation to be main
Constitute.
Priority Applications (1)
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| CN106813690A (en) * | 2015-11-27 | 2017-06-09 | 江南石墨烯研究院 | A kind of ultra large deformation cylindrical condenser sensor and preparation method thereof |
| CN107640736B (en) * | 2017-08-10 | 2019-06-04 | 天津大学 | A kind of generating device of electromagnetic type high-precision ultra micro power |
| CN111397775B (en) * | 2020-04-21 | 2021-11-19 | 重庆交通大学 | Prestress monitoring device |
| CN114777983B (en) * | 2022-04-21 | 2022-11-18 | 中国人民解放军国防科技大学 | Array type explosive shock wave work capacity measuring device and method |
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| CN2735470Y (en) * | 2004-10-12 | 2005-10-19 | 华北工学院 | Isolated gun bore pressure tester |
| CN1693863A (en) * | 2005-06-09 | 2005-11-09 | 西安交通大学 | Superhigh pressure dynamic pressure sensor |
| CN101201229A (en) * | 2007-11-26 | 2008-06-18 | 中北大学 | Minisize condenser type sensing, bearing structure integrated electric voltage detector |
| CN101762357A (en) * | 2009-12-29 | 2010-06-30 | 西安交通大学 | Strain supervoltage pressure transformer |
| CN102539049A (en) * | 2012-01-16 | 2012-07-04 | 中北大学 | Capacitance pressure tester |
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Patent Citations (5)
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|---|---|---|---|---|
| CN2735470Y (en) * | 2004-10-12 | 2005-10-19 | 华北工学院 | Isolated gun bore pressure tester |
| CN1693863A (en) * | 2005-06-09 | 2005-11-09 | 西安交通大学 | Superhigh pressure dynamic pressure sensor |
| CN101201229A (en) * | 2007-11-26 | 2008-06-18 | 中北大学 | Minisize condenser type sensing, bearing structure integrated electric voltage detector |
| CN101762357A (en) * | 2009-12-29 | 2010-06-30 | 西安交通大学 | Strain supervoltage pressure transformer |
| CN102539049A (en) * | 2012-01-16 | 2012-07-04 | 中北大学 | Capacitance pressure tester |
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