CN114323419A - Take redundant pressure core of double chip - Google Patents
Take redundant pressure core of double chip Download PDFInfo
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- CN114323419A CN114323419A CN202111642171.0A CN202111642171A CN114323419A CN 114323419 A CN114323419 A CN 114323419A CN 202111642171 A CN202111642171 A CN 202111642171A CN 114323419 A CN114323419 A CN 114323419A
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- base
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- pressure core
- redundant pressure
- dual
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- 238000009434 installation Methods 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 229920002545 silicone oil Polymers 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 14
- 230000009977 dual effect Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 238000010894 electron beam technology Methods 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a redundant pressure core body with double chips, which comprises a base, a ceramic pad, a corrugated diaphragm, a guide pin and two chips, wherein the bottom of the base is provided with an installation cavity; the corrugated diaphragm is arranged at the opening part of the installation cavity, and silicone oil is filled in the sealed installation cavity packaged by the corrugated diaphragm. The invention has the advantages of simple structure, small volume, light weight, high yield and the like.
Description
Technical Field
The invention mainly relates to the technical field of pressure detection, in particular to a redundant pressure core body with double chips.
Background
With the vigorous development of aerospace and aviation in China, more advanced new technologies and new processes are rapidly developed, popularized and applied. However, in the aspect of high-performance components, compared with the national developed technology, China has a larger gap, for example, a 1.5MPa measuring range dual-redundancy pressure sensor for detecting the lubricating oil pressure of a certain type of aircraft engine has no existing mature product and technology in China, and only two sensors can be used for replacing the pressure sensor, so that the cost, the volume and the weight are increased, and the resource carrying capacity of an aircraft is reduced.
Specifically, the disadvantages of the existing dual redundant sensors are as follows:
1) two independent cores are adopted for measurement, and compared with a single core, the volume is large;
2) two cores are welded, and two welding seams have mutual heat influence, so that the previously welded core is subjected to secondary heating, the output change of the core is large, and the welding quality is not high finally; like two independent cores and sensor base sealing connection, generally adopt electron beam welding, the heat gauge height that produces during the welding makes core offset at zero point more easily, increases the degree of difficulty for the rear end compensation, leads to the core to damage when serious, and two independent cores need electron beam welding twice, and first welded core can receive the secondary heat influence, more probably damages the core.
3) The finished product rate is not high, the sensors of the two independent cores belong to a series mode, and the finished product rate is quadratic to the finished product rate of a single core; one core is not welded well, resulting in the rejection of the entire sensor. For example, a single core sensor is found to be 70% and a dual core yield is only 49%.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, the invention provides the redundant pressure core body with the double chips, which has the advantages of simple structure, small volume, light weight and high yield.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a redundant pressure core body with double chips comprises a base, a ceramic pad, a corrugated diaphragm, a guide pin and two chips, wherein the bottom of the base is provided with an installation cavity, the base is provided with a plurality of installation holes communicated with the installation cavity, the chips are adhered in the installation cavity and fixed in the installation cavity through the ceramic pad connected with the base, and the guide pin penetrates through the installation holes and is electrically communicated with the chips; the corrugated diaphragm is arranged at the opening part of the installation cavity, and silicone oil is filled in the sealed installation cavity packaged by the corrugated diaphragm.
As a further improvement of the above technical solution:
the periphery of the corrugated diaphragm is provided with a pressing ring, and the corrugated diaphragm is welded between the pressing ring and the base in an electron beam welding mode.
The guide pin and the mounting hole are sealed through sealing glaze.
The chip is connected with the guide pin through a gold wire, and the gold wire is positioned in the hole of the ceramic pad.
The base is made of 316L stainless steel material.
The guide needle is made of 4J50 expansion alloy.
The number of the mounting holes is 8-12, and the mounting holes are uniformly distributed on the base in an annular shape.
The quantity of mounting hole is 10, and corresponding guide pin quantity is 10, the guide pin wear to locate in the mounting hole.
The base is connected with the ceramic pad through a pin.
The chip is bonded inside the base by glue.
Compared with the prior art, the invention has the advantages that:
according to the redundant pressure core body with the double chips, the single core body is adopted to package the double chips, the purpose of pressure double-path independent measurement is finally achieved, and double redundant design is realized; the double-redundancy pressure measurement is realized by packaging two chips in one core body, and compared with a sensor for single-core body measurement, the occupied space is not enlarged, and the size and the weight of the pressure sensor are reduced; the double chips are packaged in the core body, and sealing connection can be realized only by one welding, so that the welding heat influence is reduced, and the yield of products is improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a core body of the present invention in an embodiment.
Fig. 2 is a schematic top view of the core of the present invention.
Fig. 3 is a schematic structural view of a base and a needle according to an embodiment of the present invention.
Illustration of the drawings: 1. leading a needle; 2. sealing the glaze; 3. a base; 4. a ceramic pad; 5. a chip; 6. pressing a ring; 7. a corrugated diaphragm; 8. a pin.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1, the redundant pressure core with dual chips of the embodiment of the present invention includes a base 3, a ceramic pad 4, a corrugated diaphragm 7, a lead pin 1 and two chips 5, wherein the bottom of the base 3 is provided with a mounting cavity, the base 3 is provided with a plurality of mounting holes communicated with the mounting cavity, the chips 5 are adhered to the surface of the base 3 in the mounting cavity and fixed in the mounting cavity through the ceramic pad 4 connected with the base 3, and the lead pin 1 passes through the mounting holes and is electrically communicated with the chips 5; the corrugated diaphragm 7 is installed at the opening part of the installation cavity, and silicone oil is filled in the sealed installation cavity packaged by the corrugated diaphragm 7.
According to the redundant pressure core body with the double chips, the single core body is adopted to package the double chips 5, the purpose of pressure double-path independent measurement is finally achieved, and double redundancy design is realized; the double-redundancy pressure measurement is realized by encapsulating two chips 5 in one core body, and compared with a sensor for single-core body measurement, the occupied space is not enlarged, and the size and the weight of the pressure sensor are reduced; the double chips are packaged in the core body, and sealing connection can be realized only by one welding (peripheral welding of the corrugated diaphragm 7), so that the welding heat influence is reduced, and the yield of products is improved.
In a specific embodiment, two chips 5 are adhered to the base 3 through glue, a ceramic pad 4 is adopted to fix the position, a gold wire is led from the chip 5 to the lead pin 1, and the lead pin 1 and an external circuit board form electrical connection; wherein the guide pin 1 and the mounting hole are sealed by sealing glaze 2; wherein, the corrugated diaphragm 7, the pressure ring 6 and the base 3 are welded together through an electron beam, silicon oil is filled into the core body subsequently, and the ceramic pad 4 and the base 3 are pressed and sealed through the pin 8 to form a complete core body.
In a specific embodiment, the base 3 of the present invention is increased from 6 pins 1 of a conventional core to 10 pins, and the positions of the pins are determined by a simulation design, so that the pins and the pressure packaging are convenient. The main material of the base 3 is 316L stainless steel, through tests, the highest pressure resistance reaches 100MPa, the process is mature, the sintering quality is controllable, and the method is the current mainstream technology. The lead needle 1 is designed by adopting a new material 4J50 expansion alloy, the 4J50 expansion alloy has a large thermal expansion coefficient and comprises three states (an annealing state, a soft state and a hard state), the product needs to be subjected to heat treatment before sintering, the product can be obviously softened after the heat treatment and is not easy to break, the annealing state has low hardness and the elongation is high, so that the product is not easy to break in the bending process, and the capability of resisting a vibration environment is improved.
In a specific embodiment, the ceramic pad 4 is designed by matching with the base 3, the positions and the sizes of the corresponding holes of the guide pin 1 and the pin 8 are designed, the strength of the ceramic pad is calculated by simulation, and the reliability of the ceramic pad applied in a strong vibration environment is verified; the two square holes are fixing areas for fixing the double chips 5, and play an insulating role; wherein, the gold wire led out from the chip 5 is arranged inside the hole of the ceramic pad 4 to ensure the insulation among all the pins. The above-mentioned ceramic pad 4 may be designed to have two chips 5 inside the core of Φ 19.
The dual-redundancy core body has a compact structure, two chips 5 are accommodated in a narrow internal space, the dual-redundancy core body is suitable for a dual-redundancy pressure measurement application environment, and the overall dimension of the dual-redundancy pressure sensor is not increased; compared with the conventional two cores which are independently applied, the double-chip 5 packaging mode reduces welding, reduces the heat influence of welding on the cores and improves the yield of the cores.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (10)
1. The redundant pressure core body with the double chips is characterized by comprising a base (3), a ceramic pad (4), a corrugated diaphragm (7), a guide pin (1) and two chips (5), wherein the bottom of the base (3) is provided with an installation cavity, the base (3) is provided with a plurality of installation holes communicated with the installation cavity, the chips (5) are adhered in the installation cavity and are fixed in the installation cavity through the ceramic pad (4) connected with the base (3), and the guide pin (1) penetrates through the installation holes and is electrically communicated with the chips (5); the corrugated diaphragm (7) is arranged at the opening part of the installation cavity, and silicone oil is filled in the sealed installation cavity packaged by the corrugated diaphragm (7).
2. The redundant pressure core with dual chips according to claim 1, characterized in that the corrugated diaphragm (7) is provided with a press ring (6) at its periphery, and the corrugated diaphragm (7) is welded between the press ring (6) and the base (3) by means of electron beam welding.
3. Redundant pressure core with dual chip according to claim 1 or 2, characterized in that the sealing between the needle (1) and the mounting hole is performed by means of a sealing frit (2).
4. Redundant pressure core with dual chip according to claim 1 or 2, characterized in that the chip (5) is connected to the lead pin (1) by a gold wire, which is located in the hole of the ceramic pad (4).
5. Redundant pressure core with dual chips according to claim 1 or 2, characterized in that the base (3) is made of 316L stainless steel material.
6. The redundant pressure core with dual core plates according to claim 1 or 2, characterized in that the needle (1) is made of 4J50 expanded alloy.
7. Redundant pressure core with dual chips according to claim 1 or 2, characterized in that the number of mounting holes is 8-12, evenly distributed in a ring shape on the base (3).
8. The redundant pressure core with dual chips according to claim 7, characterized in that the number of the mounting holes is 10, the number of the corresponding guide pins (1) is 10, and the guide pins (1) are inserted into the mounting holes.
9. Redundant pressure core with dual chips according to claim 1 or 2, characterized in that the connection between the base (3) and the ceramic mat (4) is by means of pins (8).
10. Redundant pressure core with dual chips according to claim 1 or 2, characterized in that the chip (5) is glued inside the base (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111642171.0A CN114323419A (en) | 2021-12-29 | 2021-12-29 | Take redundant pressure core of double chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111642171.0A CN114323419A (en) | 2021-12-29 | 2021-12-29 | Take redundant pressure core of double chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114323419A true CN114323419A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111642171.0A Pending CN114323419A (en) | 2021-12-29 | 2021-12-29 | Take redundant pressure core of double chip |
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| CN (1) | CN114323419A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203365047U (en) * | 2013-08-16 | 2013-12-25 | 中国电子科技集团公司第四十八研究所 | Dual-path pressure sensitive core |
| CN105115659A (en) * | 2015-08-31 | 2015-12-02 | 中国电子科技集团公司第四十八研究所 | Multi-redundancy pressure-sensitive core body |
| CN109870266A (en) * | 2017-12-04 | 2019-06-11 | 南京沃天科技有限公司 | A kind of dual chip differential pressure core |
| CN213148194U (en) * | 2020-09-07 | 2021-05-07 | 中国航发控制系统研究所 | Multi-chip pressure sensor |
-
2021
- 2021-12-29 CN CN202111642171.0A patent/CN114323419A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203365047U (en) * | 2013-08-16 | 2013-12-25 | 中国电子科技集团公司第四十八研究所 | Dual-path pressure sensitive core |
| CN105115659A (en) * | 2015-08-31 | 2015-12-02 | 中国电子科技集团公司第四十八研究所 | Multi-redundancy pressure-sensitive core body |
| CN109870266A (en) * | 2017-12-04 | 2019-06-11 | 南京沃天科技有限公司 | A kind of dual chip differential pressure core |
| CN213148194U (en) * | 2020-09-07 | 2021-05-07 | 中国航发控制系统研究所 | Multi-chip pressure sensor |
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