CN218628760U - Piezoelectric pressure sensor structure for measuring pressure load on surface of target - Google Patents
Piezoelectric pressure sensor structure for measuring pressure load on surface of target Download PDFInfo
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- CN218628760U CN218628760U CN202223171052.4U CN202223171052U CN218628760U CN 218628760 U CN218628760 U CN 218628760U CN 202223171052 U CN202223171052 U CN 202223171052U CN 218628760 U CN218628760 U CN 218628760U
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Abstract
A piezoelectric pressure sensor structure for measuring pressure load on the surface of a target comprises a base body, a first piezoelectric crystal, a second piezoelectric crystal, a copper electrode, a polytetrafluoroethylene insulating sleeve, a cover plate, a screw, a bolt and a signal wire. The base body is provided with a circular groove for accommodating a polytetrafluoroethylene insulating sleeve, a first piezoelectric crystal, a second piezoelectric crystal and a copper electrode, wherein the copper electrode is positioned between the two piezoelectric crystals, and a copper electrode signal leading-out end is welded with a signal wire anode together and wrapped by an insulating sleeve. The patent of the utility model provides a piezoelectric type pressure sensor structure is used in measurement of target surface pressure load, this sensor structure have the ability of accurate measurement explosion shock wave pressure wave form curve (for short p-t curve), shock wave ratio impulse and pressure duration to have the advantage that natural frequency is high and the uniformity is good.
Description
Technical Field
The utility model belongs to the technical field of the sensor, concretely relates to piezoelectric type pressure sensor structure for measuring target surface pressure load.
Background
The blast of a warhead or explosive can create a strong shock wave. The shock wave can form two areas similar to a double-layer sphere in the process of being transmitted in air or a closed space, wherein the outer layer is a compression area, and the inner layer is a sparse area. The compressed air is compressed in the compression area, and the pressure of the compressed air is greatly over the normal atmospheric pressure, namely overpressure. The pressure in the sparse zone is lower than normal atmospheric pressure due to the pulsation of the explosive product following the shock wave, i.e. a negative pressure occurs. Since the air is compressed to move outward, the shock wave pressure generated by the air moving outward is called dynamic pressure. Therefore, in order to reliably assess the destructive power of a warhead explosion on a target, accurate measurements of the pressure load acting on the surface of the target are required.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a piezoelectric pressure sensor structure for target surface pressure load measurement, this sensor structure have the ability of accurate measurement explosion shock wave pressure wave form curve (for short p-t curve), shock wave ratio impulse and pressure duration to have the advantage that natural frequency is high and the uniformity is good.
In order to realize the purpose, the utility model adopts the technical proposal that:
a piezoelectric pressure sensor structure for measuring pressure load on the surface of a target comprises a base body, a first piezoelectric crystal, a second piezoelectric crystal, a copper electrode, a polytetrafluoroethylene insulating sleeve, a cover plate, a screw, a bolt and a signal wire, wherein the cover plate is fixed on the base body through the screw;
the polytetrafluoroethylene insulating sleeve is a circular ring with a notch, the notch is used for clamping and positioning a signal line anode, the middle area of the circular ring is used for placing a first piezoelectric crystal, a second piezoelectric crystal and a copper electrode, the outer wall of the base body is provided with a circular threaded hole, a circular through hole is formed in the middle of a bolt and used for leading out the signal line, and the bolt is screwed in from the threaded hole of the base body and compresses a cathode of the signal line.
As the utility model discloses further improve, insulating cover of polytetrafluoroethylene and base body between utilize thermal-insulated insulating cement to bond together, the breach is just realizing the location to the screw hole of base body.
As the utility model discloses further improve, the base body on have 6 screw holes, the apron on have 6 round holes, the screw through 6 screw holes of 6 round hole screw in base bodies on the apron, will lap and base body and go up fixed together to push down first slice piezoelectric crystal by the apron, and then exert certain pretightning force for first slice piezoelectric crystal, copper electrode and second slice piezoelectric crystal.
As the utility model discloses further improve, the base body on still open 3 step round holes, accessible bolt or fix with screw are on the target.
As the utility model discloses further improve, apron thickness direction and base body complex position, scribble the thermal-insulated insulating glue of one deck for isolated explosion shock wave thermal current is to sensor structure output response's influence.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The cover plate is pre-tightened by adopting the screws, and the piezoelectric pressure sensor structure integrally shows high natural frequency.
(2) The two piezoelectric crystals, the copper electrode and the positive electrode of the signal wire are restrained and positioned by the polytetrafluoroethylene insulating sleeve, so that the piezoelectric pressure sensor has good consistency.
Drawings
Fig. 1 is a schematic structural section view of a piezoelectric pressure sensor for measuring a pressure load on a target surface according to the present invention.
FIG. 2 isbase:Sub>A sectional view of the utility model taken along the line A-A;
FIG. 3 is a cross-sectional view of the present invention taken along line B-B;
reference numerals are as follows: 1. the piezoelectric ceramic base comprises a base body, 2, a first piece of piezoelectric crystal, 3, a second piece of piezoelectric crystal, 4, a copper electrode, 5, a polytetrafluoroethylene insulating sleeve, 6, a cover plate, 7, a screw, 8, a bolt, 9 and a signal wire.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
as shown in fig. 1-3, according to the technical solution of the present invention, this embodiment provides a piezoelectric pressure sensor structure for measuring target surface pressure load, including base body 1, first piece of piezoelectric crystal 2, second piece of piezoelectric crystal 3, copper electrode 4, polytetrafluoroethylene insulating sleeve 5, cover plate 6, screw 7, bolt 8, signal line 9. The base body 1 is provided with a circular groove for placing a polytetrafluoroethylene insulating sleeve 5, a first piezoelectric crystal 2, a second piezoelectric crystal 3 and a copper electrode 4, wherein the copper electrode 4 is positioned between the two piezoelectric crystals, and a signal leading-out end of the copper electrode 4 is welded with the positive electrode of a signal wire 9 and wrapped by a thermoplastic pipe.
The polytetrafluoroethylene insulating sleeve 5 is a circular ring with a notch, the notch is used for clamping and positioning the positive electrode of the signal wire 9, the middle area of the circular ring is used for placing the first piezoelectric crystal 2, the second piezoelectric crystal 3 and the copper electrode 4, the outer wall of the base body 1 is provided with a circular threaded hole, the middle of the bolt 8 is provided with a circular through hole used for leading out the signal wire 9, and the bolt 8 is screwed in from the threaded hole of the base body 1 and tightly presses the negative electrode of the signal wire 9.
The polytetrafluoroethylene insulation sleeve 5 and the base body 1 are bonded together by heat insulation and insulation glue, and the notch is just opposite to the threaded hole of the base body 1 to realize positioning.
The base body 1 is provided with 6 threaded holes, the cover plate 6 is provided with 6 round holes, the screws 7 are screwed into the 6 threaded holes of the base body through the 6 round holes in the cover plate, the cover plate 6 and the base body 1 are fixed together, the cover plate 6 presses the first piezoelectric crystal 2, and then certain pre-tightening force is applied to the first piezoelectric crystal 2, the copper electrode 4 and the second piezoelectric crystal 3.
The base body 1 is also provided with 3 step round holes, and the round holes can be fixed on a target through bolts or screws.
The cover plate 6 is coated with a thin layer of heat insulation glue at the position where the thickness direction of the cover plate is matched with the base body 1, and the heat insulation glue is used for isolating the influence of the heat flow of the explosion shock wave on the output response of the sensor structure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but also to cover any modifications or equivalent changes made in the technical spirit of the present invention, which fall within the scope of the present invention.
Claims (5)
1. The utility model provides a target surface pressure load is piezoelectric pressure sensor structure for measurement, includes base body (1), first piece piezocrystal (2), second piece piezocrystal (3), copper electrode (4), insulating cover of polytetrafluoroethylene (5), apron (6), screw (7), bolt (8) and signal line (9), its characterized in that: the cover plate (6) is fixed on the base body (1) through a screw (7), the base body (1) is provided with a circular groove for placing a polytetrafluoroethylene insulating sleeve (5), a first piezoelectric crystal (2), a second piezoelectric crystal (3) and a copper electrode (4), the copper electrode (4) is positioned between the first piezoelectric crystal (2) and the second piezoelectric crystal (3), and a signal leading-out end of the copper electrode (4) is welded with the anode of a signal wire (9) and wrapped by a thermoplastic pipe;
the polytetrafluoroethylene insulation sleeve (5) is a ring with a notch, the notch is used for clamping and positioning a signal line (9) anode, the middle area of the ring is used for placing a first piezoelectric crystal (2), a second piezoelectric crystal (3) and a copper electrode (4), the outer wall of the base body (1) is provided with a circular threaded hole, a circular through hole is formed in the middle of the bolt (8) and used for leading out the signal line (9), and the bolt (8) is screwed in from the threaded hole of the base body (1) and compresses the cathode of the signal line (9).
2. The piezoelectric pressure sensor structure for measuring pressure load on a target surface according to claim 1, wherein: the polytetrafluoroethylene insulation sleeve (5) and the base body (1) are bonded together by heat insulation insulating glue, and the notch is opposite to the threaded hole of the base body (1) to realize positioning.
3. The piezoelectric pressure sensor structure for measuring pressure load on a target surface according to claim 1, wherein: the piezoelectric crystal pressing base is characterized in that 6 threaded holes are formed in the base body (1), 6 round holes are formed in the cover plate (6), the screws (7) are screwed into the 6 threaded holes of the base body (1) through the 6 round holes in the cover plate (6), the cover plate (6) and the base body (1) are fixed together, and the cover plate (6) presses the first piezoelectric crystal (2).
4. The piezoelectric pressure sensor structure for measuring pressure load on a target surface according to claim 1, wherein: the base body (1) is also provided with 3 step round holes.
5. The piezoelectric pressure sensor structure for measuring pressure load on a target surface according to claim 1, wherein: and a layer of heat-insulating glue is coated on the position where the cover plate (6) is matched with the base body (1) in the thickness direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171052.4U CN218628760U (en) | 2022-11-29 | 2022-11-29 | Piezoelectric pressure sensor structure for measuring pressure load on surface of target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171052.4U CN218628760U (en) | 2022-11-29 | 2022-11-29 | Piezoelectric pressure sensor structure for measuring pressure load on surface of target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218628760U true CN218628760U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223171052.4U Active CN218628760U (en) | 2022-11-29 | 2022-11-29 | Piezoelectric pressure sensor structure for measuring pressure load on surface of target |
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| Country | Link |
|---|---|
| CN (1) | CN218628760U (en) |
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- 2022-11-29 CN CN202223171052.4U patent/CN218628760U/en active Active
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