CN105865708B - A kind of shock wave pressure test structure near field of exploding - Google Patents
A kind of shock wave pressure test structure near field of exploding Download PDFInfo
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- CN105865708B CN105865708B CN201610334137.XA CN201610334137A CN105865708B CN 105865708 B CN105865708 B CN 105865708B CN 201610334137 A CN201610334137 A CN 201610334137A CN 105865708 B CN105865708 B CN 105865708B
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- upper cover
- pressure sensor
- pedestal
- end cap
- shock wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/26—Details or accessories
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A kind of shock wave pressure test structure near field of exploding of the invention, belongs to Exploding test field.This is a kind of pressure sensor mounting structure, which can be placed in explosion near field, carry out the pressure test of shock wave ground return.This structure includes end cap, upper cover, pressure sensor, pedestal, laminating layer and heat-insulated grease.Pressure sensor is installed on lid, after pedestal upper surface smears laminating layer, upper cover is anchored on pedestal by soket head cap screw, then end cap is tightened on upper lid, total is buried in the earth again, heat-insulated grease finally is smeared in pressure sensor and upper cover end face, after being installed, ground, end cap, upper cover are concordant with pressure sensor end face.The present invention is near field shock wave ground return pressure test of exploding, the control of the ratio between shock wave spur performance and impact crest value is within 6% caused by capable of vibrating, and the abnormal signal situation that vibration causes is solved, the influence of seismic wave and seat vibration to test result is effectively reduced.
Description
Technical field
The invention belongs to Exploding test technical fields, and in particular to a kind of shock wave pressure test structure puts the structure
It is placed in explosion near field, obtains shock wave pressure curve.
Background technique
In explosive field power assessment, shock wave pressure is important consideration foundation.In measurement, pressure sensor is experienced
The influence of seismic wave and installation pedestal vibration, is often superimposed with vibration signal in the shockwave signal of output, and especially explosion is close
, vibration spur performance is very big, seriously affects the calculating of airblast impulse value.
In past research work, to be easily installed operation, the installation pedestal of pressure sensor is typically designed in inside
Empty shape, causes installation pedestal to be easy the influence by seismic wave, and the shockwave signal of output is severely deformed.Later by pressure
Sensor is first installed on component, is then attached components in installation pedestal by buffering spacer, can reduce partial vibration
It influences, but still has biggish vibration spur performance when near field of exploding carries out shock wave pressure test.
Summary of the invention
The application is based on a kind of explosion near field shock wave pressure test structure used in explosive test, and earthquake is effectively reduced
The influence of wave and seat vibration to test, the control of the ratio between shock wave spur performance caused by vibrating and impact crest value is 6%
Within, solve the vibrated unexpected disconnection of pressure sensor back-end circuit or the vibrated signal curve for loosening initiation of signal wire joint
The case where becoming larger suddenly to full scale value realizes that explosion near field shock wave ground return pressure is accurately tested.
The purpose of the application is, provides a kind of shock wave pressure test structure, and for exploding, near field shock wave ground is anti-
Injection pressure test.
In order to realize that above-mentioned task, the present invention take following technical solution:
A kind of shock wave pressure test structure near field of exploding, including,
End cap is able to bear instantaneous high-temperature using polytetrafluoroethylene material, is hollow cylinder, and hollow, upper is hole, under
Portion is that internal screw thread is connect with upper cover, and lower diameter is greater than upper diameter；
Upper cover is irregular cylinder, is gap-matched between top and end cap hollow, upper using Steel material；Under
Portion's diameter is greater than upper diameter, is also gap-matched between external screw thread and the hollow lower internal screw thread of end cap；Upper cover center
There are the mounting holes of pressure sensor, around stay and are symmetrically installed hole there are four soket head cap screw；
Pedestal, using Steel material, top is cylindrical body, and lower shape is similar to circular cone, but its cone angle is multiple from upper end warp
Variation is become larger by 0 °；Base central is from top digging, and there are pressure sensor distal tip signal line capacity, hole lower part is to pedestal
Side digging, is used for signal wire outlet, and signal wire outlet hole and soket head cap screw hole distance are greater than 1cm；
Further, fillet is used at the variation of pedestal cone angle, so that transitions smooth, is easily installed into ground, also can guarantee
Safety；
Laminating layer is applied to pedestal upper surface using silicon grease material, for fitting closely for upper cover and pedestal；
Heat-insulated grease is applied to pressure sensor and upper cover end face using silicon grease material, and thickness is not less than 0.5mm, is used for
It is heat-insulated；
Further, heat-insulated grease and end cap play heat-insulated high temperature action simultaneously, so that within blast fireball action time,
Explosion fuel factor not only can not be passed to pressure sensor from end face, but also can not also be passed to pressure sensor from side；
Further, pressure sensor is installed on upper lid, after pedestal upper surface smears laminating layer, upper cover is passed through interior
Hex screw is anchored on pedestal, then end cap is tightened on upper lid, then total is buried in the earth, and is finally passed in pressure
Heat-insulated grease is smeared in sensor and upper cover end face.After being installed, ground, end cap, upper cover are concordant with pressure sensor end face.
The beneficial effects of the present invention are embodied in following aspect:
(1) structure of the present invention, can be used for exploding near field shock wave ground return pressure test, and seismic wave is effectively reduced
Influence with seat vibration to test result, the control of the ratio between shock wave spur performance caused by vibrating and impact crest value exist
Within 6%, the vibrated unexpected disconnection of pressure sensor back-end circuit or the vibrated signature tune for loosening initiation of signal wire joint are solved
The case where line becomes larger suddenly to full scale value realizes the accurate measurement of explosion near field shock wave pressure.
Detailed description of the invention
Fig. 1 is general structure schematic diagram of the invention；Figure label respectively represents: 1-end cap, 2-upper covers, 3-pressure
Sensor, 4-pedestals, 5-laminating layers, 6-heat-insulated greases.
Fig. 2 is the output signal curve of Central Plains of embodiment of the present invention test structure and present invention test structure；
Fig. 3 is the output signal of former test structure and present invention test structure after different ammunition explosions in the embodiment of the present invention
Curve；
Specific embodiment
In compliance with the above technical solution, as shown in Figure 1, the first preferred embodiment of the invention are as follows:
End cap diameter is 100mm, and with a thickness of 25mm, hollow, upper is the hole of diameter 29mm, with a thickness of 5mm, lower part M88
× 2 internal thread hole, with a thickness of 20mm.
Upper cover upper diameter is 29mm, is gap-matched with a thickness of between 4.7mm, with the hollow upper hole of end cap；Lower part is
The external screw thread of M88 × 2 is gap-matched with a thickness of between 20mm, with the hollow lower opening of end cap；Center is the peace of pressure sensor
Fill hole；It is 26mm that four soket head cap screws, which are symmetrically installed centerline hole and upper cover center line distance, and mounting hole is upper wider, directly
Diameter is 17mm, and with a thickness of 13mm, lower part is relatively narrow, diameter 11mm, with a thickness of 7mm.
Pedestal overall length 275mm, top are diameter 74mm, the cylinder of thickness 5mm；Lower part initial diameter is 100mm, after 60mm
Become the circular conical surface that cone angle is 10 °, become the circular conical surface that cone angle is 42 ° after 110mm, until arriving the vertex of a cone；It is used at cone angle variation
R60 rounding；Base central is the hole of diameter 26mm, and depth 57mm, exterior surface is dug out directly at the position that depth is 20mm
Diameter is the hole of 8mm；The symmetrical internal thread hole of 4 M10 × 1.5 is dug out at the position of 26mm with base central, depth is
15mm。
In use, first pressure sensor is installed on upper lid, it, will after pedestal upper surface smears the laminating layer of 0.5mm thickness
Upper cover is anchored on pedestal by soket head cap screw, and then end cap is tightened on upper lid.
Entire pressure test structure is buried in the earth, upper cover end face and pressure sensor end face smear 0.5mm it is thick every
Hot grease, it is ensured that ground, end cap, upper cover are concordant with pressure sensor end face.Connect can be carried out after signal wire sum number is adopted it is quick-fried
Fried near field shock wave pressure test.
Embodiment 1
Use 113 type pressure sensor of PCB as test sensor, is installed in test structure, is placed in away from quick-fried
At the position that heart comparison distance is 1, the shock wave pressure signal got is as shown in solid black lines in Fig. 2.It is different bullets in Fig. 3
The shock wave pressure signal that medicine explosion obtains.Grey filled lines are the pressure signals got with former test structure in Fig. 2 and Fig. 3.
As can be seen that former test structure has been superimposed vibration due to being influenced by judder, in shockwave signal and has caused
Pressure sensor spur performance, impact wave measurement deviation caused by vibrating and impact the ratio between crest value up to 30%.Very
It is disconnected suddenly or the signal of the vibrated loosening of signal wire joint to pressure sensor back-end circuit is also superimposed with, it is accurate to lead to not
Measuring shock waves signal can not also obtain accurate airblast impulse value.
This phenomenon is then not present in the pressure test structure of design, pressure sensor spur performance deviation caused by vibrating and punching
The ratio between crest value highest only 6% is hit, it is almost negligible to disregard, also disconnects or believe suddenly there is no pressure sensor back-end circuit
The case where number wire terminal vibrated loosening, curve entirety smoother, airblast impulse value is easy interpretation.
Claims (1)
1. a kind of shock wave pressure test structure near field of exploding, including end cap (1), upper cover (2), pressure sensor (3),
Pedestal (4), laminating layer (5), heat-insulated grease (6), it is characterised in that:
End cap (1) is hollow cylinder using polytetrafluoroethylene material, and hollow, upper is hole, and lower part is internal screw thread and upper cover
(2) it connects, lower diameter is greater than upper diameter；
Upper cover (2) is irregular cylinder, is matched between upper cover (2) top and end cap hollow, upper using gap using Steel material
It closes；Lower diameter is greater than upper diameter, is also gap-matched between external screw thread and the hollow lower internal screw thread of end cap (1)；
There are the mounting holes of pressure sensor (3) at upper cover (2) center, around stay and are symmetrically installed hole there are four soket head cap screw；
Pedestal (4), using Steel material, top is cylindrical body, and lower shape is similar to circular cone, but its cone angle is repeatedly become from upper end
Change is become larger by 0 °；Pedestal (4) center is from top digging, there are pressure sensor (3) distal tip signal line capacity, hole lower part to
Side of base digging, is used for signal wire outlet, and signal wire outlet hole and soket head cap screw hole distance are greater than 1cm；
Laminating layer (5) is applied to pedestal (4) upper surface using silicon grease material, is used for the close patch of upper cover (2) and pedestal (4)
It closes；
Heat-insulated grease (6) is applied to pressure sensor (3) and upper cover (2) end face using silicon grease material, for heat-insulated；
Pressure sensor (3) is installed on upper cover (2), after laminating layer (5) are smeared in pedestal (4) upper surface, upper cover (2) is passed through interior
Hex screw is anchored on pedestal (4), and then end cap (1) is tightened on upper cover (2), finally in pressure sensor (3) and upper
It covers (2) end face and smears heat-insulated grease (6)；After being installed, end cap (1), upper cover (2) are concordant with pressure sensor (3) end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334137.XA CN105865708B (en) | 2016-05-19 | 2016-05-19 | A kind of shock wave pressure test structure near field of exploding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334137.XA CN105865708B (en) | 2016-05-19 | 2016-05-19 | A kind of shock wave pressure test structure near field of exploding |
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| Publication Number | Publication Date |
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| CN105865708A CN105865708A (en) | 2016-08-17 |
| CN105865708B true CN105865708B (en) | 2018-12-11 |
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| CN201610334137.XA Expired - Fee Related CN105865708B (en) | 2016-05-19 | 2016-05-19 | A kind of shock wave pressure test structure near field of exploding |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248282A (en) * | 2016-09-23 | 2016-12-21 | 西安近代化学研究所 | A kind of wall pressure measurement apparatus of resistance to HI high impact |
| CN106248283A (en) * | 2016-09-23 | 2016-12-21 | 西安近代化学研究所 | A kind of high-temperature-resistance pressure sensor being applicable to temperature and pressure explosive field |
| CN106768628A (en) * | 2016-12-07 | 2017-05-31 | 西安近代化学研究所 | A kind of shock wave pipe mounting structure and method for base measuring pressure response diaphragm |
| CN106644231B (en) * | 2016-12-08 | 2019-03-08 | 西安近代化学研究所 | Measure the effect target structure and test method of removable target shock wave pressure peak value |
| 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 |
| CN107014533B (en) * | 2017-04-18 | 2019-04-19 | 西安近代化学研究所 | A kind of quick response impact wave filter suitable for quasi-static pressure measurement |
| CN110031141A (en) * | 2019-05-23 | 2019-07-19 | 中煤科工集团重庆研究院有限公司 | Explosion shock wave detector |
| CN111562044B (en) * | 2020-06-05 | 2021-10-08 | 中国船舶科学研究中心 | Underwater explosion water jet flow load measurement sensor protection device and manufacturing process thereof |
| CN113933186A (en) * | 2021-09-25 | 2022-01-14 | 中国人民解放军火箭军工程大学 | Device and method for measuring shock wave load borne by inner wall of closed explosion container |
| CN114812902B (en) * | 2022-04-27 | 2023-02-21 | 北京理工大学 | Punching type explosion shock wave impulse tester and layout method thereof |
| CN116183083B (en) * | 2023-03-03 | 2024-06-21 | 西北核技术研究所 | Near-ground omni-directional pressure sensor and shock wave measurement system |
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| CN105865708A (en) | 2016-08-17 |
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Granted publication date: 20181211 |