CN204177522U - A kind of pressure transducer - Google Patents
A kind of pressure transducer Download PDFInfo
- Publication number
- CN204177522U CN204177522U CN201420605340.2U CN201420605340U CN204177522U CN 204177522 U CN204177522 U CN 204177522U CN 201420605340 U CN201420605340 U CN 201420605340U CN 204177522 U CN204177522 U CN 204177522U
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- metallic cylinder
- pressure
- lead bracket
- periphery
- elastic strain
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Abstract
The utility model discloses a kind of pressure transducer, comprise pressure chip and down-lead bracket, described pressure chip comprises elastic strain diaphragm, for supporting the periphery fixed of described elastic strain diaphragm, described periphery fixed comprises the metallic cylinder that top inwall contacts with described elastic strain diaphragm periphery, described down-lead bracket is fixed on described metallic cylinder top, and described down-lead bracket external diameter is equal with described metallic cylinder external diameter; Described metal cylinder drum outer wall offers annular groove, is provided with O-ring seal in described annular groove.The utility model adopts O-ring seal to carry out isolating seal to measured medium, the unreliable problem of weld seam existed when solving material of the same race and heterogeneous material welding, and sensor outside dimension is consistent with pressure chip external diameter, volume and the quality of sensor greatly can be reduced.
Description
Technical field
The utility model relates to a kind of pressure transducer.
Background technology
Existing periphery fixed pressure transducer, all adopt welding manner by the periphery fixed of pressure chip and pedestal integrally welded, down-lead bracket (for cylindrical structure) is also welded on pedestal 14, reach the sealing effectiveness of measured medium in elastomeric chamber, realize pressure test, as shown in Figure 1, this mounting structure volume, quality are larger.The pressure measurement scope of general stainless steel elastic body pressure transducer is all at more than MPa, and pressure medium is larger.And the pressure transducer adopting welded seal to manufacture, weld seam exist slag inclusion, cavity, fusion penetration not, the problem such as welding seam bias, weld seam can be caused cracking to occur under the effect of measured medium pressure and reveals, and when the material of weldment is inconsistent, welding quality more cannot ensure, affects the safety and reliability of sensor when practical application.
Summary of the invention
Technical problem to be solved in the utility model is, not enough for prior art, provides a kind of pressure transducer, and the unreliable problem of weld seam existed when solving material of the same race and heterogeneous material welding, reduces volume and the quality of sensor.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of pressure transducer, comprise pressure chip, down-lead bracket and pedestal, described pressure chip comprises elastic strain diaphragm, for supporting the periphery fixed of described elastic strain diaphragm, described periphery fixed comprises the metallic cylinder that top inwall contacts with described elastic strain diaphragm periphery, described down-lead bracket is fixed on described metallic cylinder top, and described down-lead bracket external diameter is equal with described metallic cylinder external diameter; Described metal cylinder drum outer wall offers annular groove, is provided with O-ring seal in described annular groove; The coated described metallic cylinder of pedestal and described down-lead bracket, and described pedestal side inner walls contacts with described O-ring seal; Described down-lead bracket top is fixed with pressure ring; Described pressure ring periphery contacts with described base internal wall.
Described down-lead bracket is welded on described metallic cylinder top, due to not by the effect of measured medium pressure, there is not the problem that measured medium leaks.
Compared with prior art, the beneficial effect that the utility model has is: the utility model adopts O-ring seal to carry out isolating seal to measured medium, the unreliable problem of weld seam existed when solving material of the same race and heterogeneous material welding, and sensor outside dimension is consistent with pressure chip external diameter, volume and the quality of sensor greatly can be reduced.
Accompanying drawing explanation
Fig. 1 is existing pressure transducer seal welding schematic diagram;
Fig. 2 is the utility model pressure sensor package design drawing;
Fig. 3 is the utility model pressure chip design structure diagram;
Fig. 4 is the utility model pressure transducer down-lead bracket design drawing;
Fig. 5 is the utility model pressure transducer and pedestal connection diagram;
Fig. 6 is Wheatstone bridge.
Embodiment
As shown in Figure 2, the utility model one embodiment comprises pressure chip, down-lead bracket 2 and pedestal 14, described pressure chip comprises elastic strain diaphragm 15, for supporting the periphery fixed of described elastic strain diaphragm, described periphery fixed comprises the metallic cylinder 1 that top inwall contacts with described elastic strain diaphragm periphery, described down-lead bracket 2 is fixed on described metallic cylinder 1 top, and described down-lead bracket 2 external diameter is equal with described metallic cylinder 1 external diameter; Described metallic cylinder 1 outer wall offers annular groove 13, is provided with O-ring seal 3 in described annular groove 13.
Described down-lead bracket 2 is welded on described metallic cylinder 1 top.
The coated described metallic cylinder 1 of the utility model sensor base 14 and described down-lead bracket 2, and described pedestal 14 side inner walls contacts with described O-ring seal 3; Described down-lead bracket 2 top is fixed with pressure ring 16; Described pressure ring 16 periphery and described pedestal 14 contact internal walls.
As shown in Figure 3 and Figure 4, O-ring seal 3 realizes isolation and the sealing of measured medium, and the size of annular groove 13 is determined according to the geomery of O-ring seal 3.Adopt film deposition techniques; at the chip surface of elastomer through polishing successively depositing insulating films 5, strain resistor 4, lead pad 7 and diaphragm 6; and it is shaping to utilize photoetching technique to carry out making to the figure of strain resistor 4, lead pad 7 and diaphragm 6 respectively, final acquisition has the pressure chip 1 of pressure-electric signal translation function.Described down-lead bracket 2, the pressure signal for pressure chip is drawn and transmission, as shown in Figure 4.A kind of described pressure sensor package method is as follows.Internal lead plate 9 is arranged on the stem 12 of down-lead bracket 2 lower end, then down-lead bracket 2 and pressure chip are welded together, with internal lead 8, lead pad 7 is connected conducting with internal lead plate 9, finally outer lead plate 10 is installed to the upper end stem 12 of down-lead bracket 2, so far the encapsulation of pressure transducer is completed, after O-ring seal 3 is inserted in annular groove 13, can measure the pressure of measured medium.Down-lead bracket 2 welds the weld seam produced with pressure chip, due to not by the effect of measured medium pressure, there is not measured medium leakage problem.
Pressure transducer principle of work is as follows.4 strain resistors 4 of pressure chip form a Wheatstone bridge, and as shown in Figure 6, under the effect of measured medium pressure, pressure chip diaphragm deforms, causes the change in resistance of 4 strain resistors 4, make Wheatstone bridge export a difference signal.Difference signal is sent to stem 12 via lead pad 7, internal lead 8 and internal lead plate 9, then accesses treatment circuit or Displaying Meter at stem 12, can learn the size of measured medium pressure.
Claims (2)
1. a pressure transducer, comprise pressure chip, down-lead bracket (2) and pedestal (14), described pressure chip comprises elastic strain diaphragm (15), for supporting the periphery fixed of described elastic strain diaphragm, described periphery fixed comprises the metallic cylinder (1) that top inwall contacts with described elastic strain diaphragm periphery, it is characterized in that, described down-lead bracket (2) is fixed on described metallic cylinder (1) top, and described down-lead bracket (2) external diameter is equal with described metallic cylinder (1) external diameter; Described metallic cylinder (1) outer wall offers annular groove (13), is provided with O-ring seal (3) in described annular groove (13); Described down-lead bracket (2) and described metallic cylinder (1) are all arranged in described pedestal (14), and described pedestal (14) side inner walls contacts with described O-ring seal (3); Described down-lead bracket (2) top is fixed with pressure ring (16); Described pressure ring (16) periphery contacts with described pedestal (14) top inner wall.
2. pressure transducer according to claim 1, is characterized in that, described down-lead bracket (2) is welded on described metallic cylinder (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420605340.2U CN204177522U (en) | 2014-10-20 | 2014-10-20 | A kind of pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420605340.2U CN204177522U (en) | 2014-10-20 | 2014-10-20 | A kind of pressure transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177522U true CN204177522U (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420605340.2U Active CN204177522U (en) | 2014-10-20 | 2014-10-20 | A kind of pressure transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204177522U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748894A (en) * | 2015-04-17 | 2015-07-01 | 中国工程物理研究院总体工程研究所 | Sputter film type soil pressure sensor |
| CN106546363A (en) * | 2016-09-29 | 2017-03-29 | 中国电子科技集团公司第四十八研究所 | A kind of diaphragm pressure sensor and its method for packing |
| CN106679854A (en) * | 2016-11-29 | 2017-05-17 | 中国电子科技集团公司第四十八研究所 | Absolute-pressure pressure sensor and preparation method thereof |
| CN110514330A (en) * | 2019-08-08 | 2019-11-29 | 西安中星测控有限公司 | A kind of passive two-dimensional code pressure sensor and preparation method thereof |
-
2014
- 2014-10-20 CN CN201420605340.2U patent/CN204177522U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748894A (en) * | 2015-04-17 | 2015-07-01 | 中国工程物理研究院总体工程研究所 | Sputter film type soil pressure sensor |
| CN106546363A (en) * | 2016-09-29 | 2017-03-29 | 中国电子科技集团公司第四十八研究所 | A kind of diaphragm pressure sensor and its method for packing |
| CN106546363B (en) * | 2016-09-29 | 2019-09-20 | 中国电子科技集团公司第四十八研究所 | A kind of diaphragm pressure sensor and its packaging method |
| CN106679854A (en) * | 2016-11-29 | 2017-05-17 | 中国电子科技集团公司第四十八研究所 | Absolute-pressure pressure sensor and preparation method thereof |
| CN106679854B (en) * | 2016-11-29 | 2020-02-07 | 中国电子科技集团公司第四十八研究所 | Absolute pressure sensor and preparation method thereof |
| CN110514330A (en) * | 2019-08-08 | 2019-11-29 | 西安中星测控有限公司 | A kind of passive two-dimensional code pressure sensor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |