CN105784252B - A kind of overall structure cake type free-field blast pressure "pencil" sensor - Google Patents
A kind of overall structure cake type free-field blast pressure "pencil" sensor Download PDFInfo
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- CN105784252B CN105784252B CN201610115119.2A CN201610115119A CN105784252B CN 105784252 B CN105784252 B CN 105784252B CN 201610115119 A CN201610115119 A CN 201610115119A CN 105784252 B CN105784252 B CN 105784252B
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- cake
- axially extending
- pressure
- extending bore
- flow
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000002360 explosive Substances 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000035939 shock Effects 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000035945 sensitivity Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000009021 linear effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011032 tourmaline Substances 0.000 description 2
- 229940070527 tourmaline Drugs 0.000 description 2
- 229910052613 tourmaline Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of overall structure cake type free-field blast pressure "pencil" sensors, belong to explosion wave Overpressure Field field of measuring technique；It includes: flow-guiding structure, positioning tube, elastic element, core electrode, piezoelectric element, pressure-bearing copper electrode, insulating positioning sleeve, signal wire, connector and cable connecting seat；Core electrode is sleeved in the axially extending bore of flow-guiding structure cake, and two piezoelectric elements and two pressure-bearing copper electrodes are located at the both ends of core electrode；Insulating positioning sleeve is sleeved on the outer circumference surface of core electrode, piezoelectric element and pressure-bearing copper electrode；In the gap for the cake axially extending bore that positioning tube and two elastic elements are sleeved on insulating positioning sleeve and flow-guiding structure；One end of connector is fixed in the axially extending bore of flow-guiding structure support rod, is equipped with cable connecting seat in the axially extending bore of the other end；The both ends of signal wire are separately fixed in the through-hole of core electrode and on cable connecting seat；The present invention has preferable watertightness and impact resistance, can satisfy field explosive test requirement.
Description
Technical field
The invention belongs to explosion wave Overpressure Field field of measuring technique, and in particular to a kind of overall structure cake type is free
Field pressure sensor.
Background technique
The peak overpressure of the explosive air-shock wave that explosion time generates in the sky and momentum are one of explosive energy characteristic
Important parameter, and measure ammunition especially explosion and killing a --- important indicator of blast warhead damage effect.?
The positive pressure of shock wave for vertically skimming over component sensitive component surfaces is directly measured in mid-air explosion or water shooting positive pressure of shock wave field
When, it is necessary to use free-field blast pressure "pencil" sensor；When this sensor is installed this sensor support bar must be directed toward in explosion
The heart.In the explosive test of field, this free-field blast pressure "pencil" sensor be suitable in, it is remote on away from ground certain altitude shock wave
The direct measurement of superpressure.
The pressure sensor of measurement free field positive pressure of shock wave is generally penholder type and two kinds of cake type at present, and cake type passes
Sensor carries out water conservancy diversion by front end cake shape, does not influence shock wave incoming flow conditions as far as possible.Pen tip when relative to the test of penholder shape
It must be directed at the rigors of the quick-fried heart, requirement of the cake formula sensor for incoming flow orientation wants wide in range more, as long as incoming flow is in cake
Validity test can be achieved within the scope of the 180 degree of front side, the adaptability of sensor installation environment is remarkably reinforced.
Existing cake type sensor is divided into two classes: one kind is the approximate patty that head directly applies tourmaline crystal to be made into
Structure will have a direct impact on sensitivity and service performance after edge is broken since tourmaline material is frangible；Another kind of is head and branch
Strut is welded, because the thermal stress of welding makes sensing element peripheral parts overall structure be difficult to reach design machining accuracy
It is required that causing the deformation of sensor after assembling, transducer sensitivity linear rule is produced bigger effect.
In the explosive test of field, it is desirable that pressure sensor must have following some performances:
(1) sufficiently wide range, if upper limit amount journey is 200MPa, lower limit amount 0.5MPa；
(2) sufficiently high sensitivity, such as 40pc/MPa~200pc/MPa；
(3) sensitivity is non-linear, and such as≤1%；
(4) rise time, such as≤2 μ of μ s~10 s；
(5) operating temperature, such as -20 DEG C~60 DEG C；
(6) there is the performance to water-stop.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of overall structure cake type free-field blast pressure "pencil" sensor, the sensing
It is symmetrical arranged two piezoelectric elements in device, effectively enhances pressure experience sensibility；And the sensor has preferable watertightness
And impact resistance, it can satisfy field explosive test requirement.
The present invention is achieved through the following technical solutions:
A kind of overall structure cake type free-field blast pressure "pencil" sensor, comprising: flow-guiding structure, positioning tube, elastic element, core electricity
Pole, piezoelectric element, pressure-bearing copper electrode, insulating positioning sleeve, signal wire, connector and cable connecting seat；
The flow-guiding structure forms overall structure by support rod and cake, and cake axis intersects vertically with bearing rod axis,
Cake end face and support rod side seamlessly transit；Two end faces of cake are to the inclined inclined-plane of its axis；Cake and support rod
Center at be machined with axially extending bore, two axially extending bores perforations；
The core electrode is cylindrical structure, is machined with the through-hole along core electrode radial direction in cylindrical structure；
The piezoelectric element and pressure-bearing copper electrode are disk-shaped structure；
The elastic element is one end open cylinder closed at one end；
The insulating positioning sleeve is the cylinder for being machined with axially extending bore, is machined on cylinder for arranging the recessed of signal wire
Slot；
The connector is the stepped cylinder shape structure with axially extending bore；
Its connection relationship is as follows: core electrode coaxial package is in the axially extending bore of flow-guiding structure cake, two piezoelectric elements
It is coaxially located at the both ends of core electrode respectively with two pressure-bearing copper electrodes, wherein two piezoelectric elements are fitted in core electrode respectively
On two end faces；Insulating positioning sleeve is sleeved on the outer circumference surface of core electrode, piezoelectric element and pressure-bearing copper electrode；Positioning tube and two
A elastic element is sleeved in the gap of the cake axially extending bore of insulating positioning sleeve and flow-guiding structure, wherein two elasticity members
The open end of part is inconsistent with the both ends of positioning tube respectively, and the inner face of two elastic element closed ends contradicts respectively to be held at two
It presses on copper electrode, outer end face is concordant with the end face of flow-guiding structure cake respectively；One end of connector is fixed on flow-guiding structure bearing
In the axially extending bore of bar, cable connecting seat is installed in the axially extending bore of the other end；The both ends of signal wire are separately fixed at core electricity
In the through-hole of pole and on cable connecting seat.
It further, further include O shape cushion rubber, the O shape cushion rubber is mounted on the contact surface of connector and flow-guiding structure.
Further, the positioning tube is the not closed cylinder in side.
Further, the core electrode uses phosphor bronze.
Further, the piezoelectric element is using quartz.
Further, the elastic element, positioning tube and connector are all made of stainless steel.
The utility model has the advantages that the piezoelectric element in (1) present invention uses two panels quartz crystal as sensing element, pass through piezoelectricity member
The low linear expansion coefficient performance of part, makes sensor of the invention that there is low temperature to float performance, and two piezoelectric elements are distributed in water conservancy diversion knot
The both ends of the axially extending bore of the cake of structure enhance pressure experience sensibility；Elastic element in the present invention has preferable knot
Structure shock resistance；And on two end faces of elastic element and the piezoelectric element cake that is installed in flow-guiding structure, there are two tools
The symmetrical pressure-bearing surface of plane improves sensor piezoelectric property reliability.
(2) flow-guiding structure in the present invention is processed as overall structure using cake and support rod, strong with fabulous structure
Degree and mounting process stability；Water conservancy diversion is carried out using the cake tip shock wave of flow-guiding structure, reduces shock wave flow field
Interference.
(3) the O shape cushion rubber in the present invention realizes the function of water-stop and acoustic insulation.
(4) sensor of the invention has sufficiently wide range, sufficiently high sensitivity, the linear property of sensitivity good enough
Can, sufficiently wide operating temperature range and to water sealing property；It can satisfy the requirement of field explosive test.
Detailed description of the invention
Fig. 1 is structure composition figure of the invention.
Fig. 2 is the partial enlarged view in Fig. 1 at A.
Fig. 3 is the main view sectional view of flow-guiding structure of the invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the structure chart of core electrode of the invention.
Fig. 6 is the structure chart of elastic element of the invention.
Fig. 7 is the structure chart of positioning tube of the invention.
Fig. 8 is the structure chart of insulating positioning sleeve of the invention.
Fig. 9 is the structure chart of connector of the invention.
Wherein, 1- flow-guiding structure, 2- positioning tube, 3- elastic element, 4- core electrode, 5- piezoelectric element, 6- pressure-bearing copper electrode,
7- insulating positioning sleeve, 8- signal wire, 9-O shape cushion rubber, 10- connector, 11- cable connecting seat.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of overall structure cake type free-field blast pressure "pencil" sensors, referring to attached drawing 1,2, comprising: water conservancy diversion
Structure 1, positioning tube 2, elastic element 3, core electrode 4, piezoelectric element 5, pressure-bearing copper electrode 6, insulating positioning sleeve 7, signal wire 8, O shape
Cushion rubber 9, connector 10 and cable connecting seat 11；
Referring to attached drawing 3,4, the flow-guiding structure 1 forms overall structure, cake axis and support rod by support rod and cake
Axis intersects vertically, and cake end face and support rod side are processed as the plane seamlessly transitted；Two end faces of cake are to its axis
Realize the water conservancy diversion of shock wave in the tip on the inclined inclined-plane of line, two annular chamfer compositions；It is equal at the center of cake and support rod
It is machined with axially extending bore, two axially extending bore perforations；The axially extending bore of support rod is machined with internal screw thread far from one end of cake；
Referring to attached drawing 5, the core electrode 4 is cylindrical structure, is machined in cylindrical structure along the logical of 4 radial direction of core electrode
Hole；
The piezoelectric element 5 and pressure-bearing copper electrode 6 are disk-shaped structure；
Referring to attached drawing 6, the elastic element 3 is one end open cylinder closed at one end；
Referring to attached drawing 7, the positioning tube 2 is the not closed cylinder in side；
Referring to attached drawing 8, the insulating positioning sleeve 7 is the cylinder for being machined with axially extending bore, is machined on cylinder for arranging
The groove of signal wire 8；
Referring to attached drawing 9, the connector 10 is the stepped cylinder shape structure with axially extending bore, and both ends are machined with respectively
Internal and external screw thread；
The core electrode 4 uses phosphor bronze；Piezoelectric element 5 is sensing element, using quartz；Elastic element 3, positioning tube 2
And connector 10 is all made of stainless steel；
Its connection relationship is as follows: 4 coaxial package of core electrode is in the axially extending bore of 1 cake of flow-guiding structure, two piezoelectricity members
Part 5 and two pressure-bearing copper electrodes 6 are coaxially located at the both ends of core electrode 4 respectively, wherein paste respectively the end face of two piezoelectric elements 5
It closes on two end faces of core electrode 4；Insulating positioning sleeve 7 is sleeved on the outer circle of core electrode 4, piezoelectric element 5 and pressure-bearing copper electrode 6
Circumferential surface；Positioning tube 2 and two elastic elements 3 are sleeved on the gap of the cake axially extending bore of insulating positioning sleeve 7 and flow-guiding structure 1
In, wherein the open end of two elastic elements 3 is inconsistent with the both ends of positioning tube 2 respectively, two 3 closed ends of elastic element
Inner face is contradicted respectively on two pressure-bearing copper electrodes 6, and outer end face is concordant with the end face of 1 cake of flow-guiding structure respectively；Connector
10 one end is threadedly coupled with the axially extending bore of 1 support rod of flow-guiding structure, is equipped with cable connection in the axially extending bore of the other end
Seat 11；And the contact surface of connector 10 and flow-guiding structure 1 is equipped with O shape cushion rubber 9；It is solid that the both ends of signal wire 8 pass through welding respectively
It is scheduled in the through-hole of core electrode 4 and on cable connecting seat 11.
Working principle: when carrying out field explosive test, the sensor measurement is exploded in the sky or water shooting generates
Shock wave whether superpressure when, the tip shock wave of the cake of flow-guiding structure 1 carries out water conservancy diversion；Shock wave vertically skims over and water conservancy diversion
The end face of two elastic elements 3 of 1 flush of structure；The shock wave pressure being subject to is passed through pressure-bearing copper electrode 6 by elastic element 3
Two piezoelectric elements 5 are passed to, one end of two piezoelectric elements 5 is by the active force close to core electrode 4, and the other end is by core
The support force of electrode 5, it is electric signal that two piezoelectric elements 5, which are squeezed pressure conversion, passes through core electrode 4, signal wire 8 and cable
Attachment base 11 transfers out；Wherein, there are two effects, one to transmit electricity for the satisfactory electrical conductivity of applied metal copper for pressure-bearing copper electrode 6
Signal, another satisfactory texture intensity for applied metal copper carry dynamic pressure, prevent brittle piezoelectric element 5 from producing under dynamic pressure effect
Raw mechanical failure.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of overall structure cake type free-field blast pressure "pencil" sensor characterized by comprising flow-guiding structure (1), positioning tube
(2), elastic element (3), core electrode (4), piezoelectric element (5), pressure-bearing copper electrode (6), insulating positioning sleeve (7), signal wire (8), O
Shape cushion rubber (9), connector (10) and cable connecting seat (11)；
The flow-guiding structure (1) forms overall structure by support rod and cake, and cake axis intersects vertically with bearing rod axis, circle
Cake end face and support rod side seamlessly transit；Two end faces of cake are to the inclined inclined-plane of its axis；Cake and support rod
Axially extending bore, two axially extending bore perforations are machined at center；
The core electrode (4) is cylindrical structure, is machined with the through-hole along core electrode (4) radial direction in cylindrical structure；
The piezoelectric element (5) and pressure-bearing copper electrode (6) are disk-shaped structure；
The elastic element (3) is one end open cylinder closed at one end；
The insulating positioning sleeve (7) is the cylinder for being machined with axially extending bore, is machined on cylinder for arranging the recessed of signal wire (8)
Slot；
The positioning tube (2) is the not closed cylinder in side；
The connector (10) is the stepped cylinder shape structure with axially extending bore；
The O shape cushion rubber (9) is mounted on the contact surface of connector (10) and flow-guiding structure (1)；
Its connection relationship is as follows: core electrode (4) coaxial package is in the axially extending bore of flow-guiding structure (1) cake, two piezoelectricity members
Part (5) and two pressure-bearing copper electrodes (6) are coaxially located at the both ends of core electrode (4) respectively, wherein two piezoelectric elements (5) are respectively
It is fitted on two end faces of core electrode (4)；Insulating positioning sleeve (7) is sleeved on core electrode (4), piezoelectric element (5) and pressure-bearing copper
On the outer circumference surface of electrode (6)；Positioning tube (2) and two elastic elements (3) are sleeved on insulating positioning sleeve (7) and flow-guiding structure
(1) in the gap of cake axially extending bore, wherein the both ends phase with positioning tube (2) respectively of the open end of two elastic elements (3)
Contradict, the inner face of two elastic element (3) closed ends contradicts respectively on two pressure-bearing copper electrodes (6), outer end face respectively with
The end face of flow-guiding structure (1) cake is concordant；One end of connector (10) is fixed on the axially extending bore of flow-guiding structure (1) support rod
It is interior, cable connecting seat (11) are installed in the axially extending bore of the other end；The both ends of signal wire (8) are separately fixed at core electrode (4)
Through-hole in and cable connecting seat (11) on.
2. a kind of overall structure cake type free-field blast pressure "pencil" sensor as described in claim 1, which is characterized in that the core electricity
Pole (4) uses phosphor bronze.
3. a kind of overall structure cake type free-field blast pressure "pencil" sensor as described in claim 1, which is characterized in that the piezoelectricity
Element (5) is using quartz.
4. a kind of overall structure cake type free-field blast pressure "pencil" sensor as described in claim 1, which is characterized in that the elasticity
Element (3), positioning tube (2) and connector (10) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115119.2A CN105784252B (en) | 2016-03-01 | 2016-03-01 | A kind of overall structure cake type free-field blast pressure "pencil" sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115119.2A CN105784252B (en) | 2016-03-01 | 2016-03-01 | A kind of overall structure cake type free-field blast pressure "pencil" sensor |
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| Publication Number | Publication Date |
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| CN105784252A CN105784252A (en) | 2016-07-20 |
| CN105784252B true CN105784252B (en) | 2019-04-09 |
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| CN201610115119.2A Active CN105784252B (en) | 2016-03-01 | 2016-03-01 | A kind of overall structure cake type free-field blast pressure "pencil" sensor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644258B (en) * | 2016-12-19 | 2019-03-08 | 西安近代化学研究所 | A kind of shock wave free field survey laminated structure for shock tube calibration |
| CN110032823B (en) * | 2019-04-22 | 2021-02-09 | 北京理工大学 | Method for evaluating explosive damage area of explosive-invading warhead |
| CN112880914B (en) * | 2021-02-05 | 2022-08-26 | 中国船舶科学研究中心 | Pressure sensor used under deepwater explosion condition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239619Y (en) * | 1995-12-28 | 1996-11-06 | 北京理工大学 | HZP free field voltage electrical pressure sensor |
| DE102007018007A1 (en) * | 2007-04-17 | 2008-10-23 | Robert Bosch Gmbh | Piezoelectric pressure sensor for use in drive unit of vehicle, has boundary surface formed between transducer element and electrodes so that transmission of transverse forces between element and electrodes is minimized in space direction |
| CN202339240U (en) * | 2011-10-26 | 2012-07-18 | 北京理工北阳***工程技术有限责任公司 | Multipoint type piezoelectric pressure sensor |
| CN103674383A (en) * | 2013-12-05 | 2014-03-26 | 中国科学技术大学 | Piezoelectric film type underwater explosion pressure sensor and measuring method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7525238B2 (en) * | 2005-01-26 | 2009-04-28 | Kistler Holding Ag | Ground insulated piezoelectric sensor for the measurement of acceleration or pressure |
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2016
- 2016-03-01 CN CN201610115119.2A patent/CN105784252B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239619Y (en) * | 1995-12-28 | 1996-11-06 | 北京理工大学 | HZP free field voltage electrical pressure sensor |
| DE102007018007A1 (en) * | 2007-04-17 | 2008-10-23 | Robert Bosch Gmbh | Piezoelectric pressure sensor for use in drive unit of vehicle, has boundary surface formed between transducer element and electrodes so that transmission of transverse forces between element and electrodes is minimized in space direction |
| CN202339240U (en) * | 2011-10-26 | 2012-07-18 | 北京理工北阳***工程技术有限责任公司 | Multipoint type piezoelectric pressure sensor |
| CN103674383A (en) * | 2013-12-05 | 2014-03-26 | 中国科学技术大学 | Piezoelectric film type underwater explosion pressure sensor and measuring method thereof |
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