CN103278285A - Differential pressure sensor - Google Patents
Differential pressure sensor Download PDFInfo
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- CN103278285A CN103278285A CN2013102296227A CN201310229622A CN103278285A CN 103278285 A CN103278285 A CN 103278285A CN 2013102296227 A CN2013102296227 A CN 2013102296227A CN 201310229622 A CN201310229622 A CN 201310229622A CN 103278285 A CN103278285 A CN 103278285A
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- shell
- differential pressure
- draft tube
- frame groove
- pressure sensor
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Abstract
The invention discloses a differential pressure sensor. The differential pressure sensor comprises a shell and an upper cover, wherein the shell is provided with an installing hole and the upper cover is provided with reinforcement ribs, and the shell and the upper cover are assembled in a matched mode. An air cavity is formed between the shell and the upper cover, and the air cavity is divided into pressure cavities which are communicated with two air inlet pipes respectively through a PCB. A frame groove where the PCB is installed is formed in the middle of the shell, and annular grooves which enable the reinforcement ribs to be placed and are filled with epoxy resin are formed in the frame groove; one of the two air inlet pipes is a coarse air inlet pipe, and the other one of the two air inlet pipes is a thin air inlet pipe. According to the differential pressure sensor, due to the arrangement of the frame groove where the PCB is installed and the grooves formed in the frame groove, the fact that the two pressure cavities are completely isolated is ensured, and therefore measuring accuracy of the differential pressure sensor is effectively ensured.
Description
Technical field
The present invention relates to sensor technical field, particularly a kind of sensor for measurement gas pressure.
Background technology
Differential pressure pickup is a kind of sensor that is used for measuring difference between two pressure, is generally used for measuring the pressure reduction of a certain equipment or parts rear and front end.Differential pressure pickup comprises shell, is provided with the cavity that is communicated with two draft tube respectively in the shell, and by the PCB circuit boards, the PCB circuit board is provided with position-sensing unit between two cavitys, is used for the draught head between induction two cavitys.When differential pressure pickup uses, install by the mounting hole matching fastener that is arranged on the shell.Its principle of work is that gas forms pressure differential in the cavity of two relative sealings, this pressure differential directly acts on the position-sensing unit of sensor, make position-sensing unit produce the micro-displacement that is directly proportional with air pressure, thereby the resistance value in the sensor circuit is changed, electronic circuit detects this change in voltage, and the canonical measure signal of a corresponding pressure of conversion output is transferred in the ECU, and ECU is to this analysis, processing and output.Yet existing differential pressure pickup is owing to the sealing effectiveness between two cavitys is relatively poor, and the accuracy that causes differential pressure pickup to measure can't ensure.
Summary of the invention
The technical matters that the present invention solves provide between a kind of two cavitys can relative closure differential pressure pickup, to improve the measuring accuracy of differential pressure pickup.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
A kind of differential pressure pickup comprises the shell of equipped mutually band mounting hole and the loam cake of band reinforcement, forms gas cavity between shell and the loam cake, and gas cavity is divided into the pressure chamber that is connected with two draft tube respectively by the PCB circuit board; The middle part of described shell is provided with the frame groove that the PCB circuit board is installed, and is provided with the annular groove of placing the loam cake reinforcement and being full of epoxy resin in the frame groove; One is thick draft tube in described two draft tube, and another root is thin draft tube.
Improvement of the present invention is: be embedded with copper insert in the mounting hole of described shell.
Further improvement of the present invention is: all adopt the arc transition syndeton between described thick draft tube and the shell and between thin draft tube and the shell.
Owing to adopted above technical scheme, the invention technological progress is as follows.
The present invention is by arranging the frame groove that the PCB circuit board is installed and the groove that arranges at the frame groove, so that the reinforcement in the placement loam cake, be filled with epoxy resin in the groove, reaching fully the state of isolating between two pressure chambers of further assurance, thereby effectively guaranteed the measuring accuracy of differential pressure pickup.
Draft tube is set to the draft tube of two different tube diameters, is used for increasing and limiting the flow of gas, adopts the arc transition syndeton between draft tube and the shell, ruptures under the effect of external force to place draft tube; The copper insert of setting-in in the shell mounting hole is used for the process at the assembling shell, avoids shell to be subjected to external impacts and causes the generation of the damaged and phenomenon of rupture of mounting hole; Above-mentioned two improvement all can effectively improve serviceable life of the present invention.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is cut-open view of the present invention.
Wherein: 1, shell, 2, the PCB circuit board, 3, position-sensing unit, 4, loam cake, 5, inserts, 6, contact pin, 7, thick draft tube, 8, thin draft tube, 9, groove, 10, the frame groove, 11, breach.
Embodiment
Below in conjunction with specific embodiments and the drawings, the present invention is further elaborated.
A kind of differential pressure pickup, its structure comprise the loam cake 4 of equipped mutually shell 1 and band reinforcement as depicted in figs. 1 and 2, and shell 1 is provided with mounting hole, is embedded with copper insert 5 in the mounting hole, and the inwall of loam cake 4 is provided with reinforcement; Form gas cavity between shell 1 and the loam cake 4, gas cavity is divided into two pressure chambers by PCB circuit board 2, two pressure chambers are connected with two draft tube respectively, one is thick draft tube 7 in two draft tube, another root is thin draft tube 8, all adopts the arc transition syndeton between thick draft tube and the shell and between thin draft tube and the shell.
The middle part of shell is provided with the frame groove 10 that the PCB circuit board is installed, and is provided with annular groove 9 in the frame groove, and annular groove 9 is used for placing the loam cake reinforcement.Annular groove 9 is provided with breach 11 so that in the groove encapsulating.
Assembling process of the present invention is as described below.
The first step pours into epoxy resin by breach in groove 9, then pcb board 2 is put into the frame groove of sensor outer housing 1, and three apertures of pcb board are aimed at three contact pins, with three contact pins of flatiron welding, puts into baking oven 30 minutes, and temperature is set at 100 ℃.
Second step, finish above step after, connect thin draft tube and source of the gas, whether leak gas around checking pcb board.
The 3rd step, in shell frame groove, smear one deck epoxy resin, loam cake 4 is placed in the frame groove, the reinforcement of loam cake is put into groove, puts into baking oven 30 minutes, and temperature is set at 100 ℃.
The 4th step, finish above step after, connect thick draft tube and source of the gas, whether leak gas around checking loam cake.
At last, take out the subassembly that assembling is finished, two draft tube of subassembly are connected with two blow vents on the shell respectively, connector and plug are to slotting, and start-up routine is imported chip with data and got final product.
Claims (3)
1. differential pressure pickup, comprise the shell (1) of equipped mutually band mounting hole and the loam cake (4) of band reinforcement, form gas cavity between shell (1) and the loam cake (4), gas cavity is divided into the pressure chamber that is connected with two draft tube respectively by PCB circuit board (2); It is characterized in that: the middle part of described shell is provided with the frame groove (10) that the PCB circuit board is installed, and is provided with the annular groove (9) of placing the loam cake reinforcement and being full of epoxy resin in the frame groove; One is thick draft tube (7) in described two draft tube, and another root is thin draft tube (8).
2. a kind of differential pressure pickup according to claim 1 is characterized in that: be embedded with copper insert (5) in the mounting hole of described shell.
3. a kind of differential pressure pickup according to claim 1 is characterized in that: all adopt the arc transition syndeton between described thick draft tube and the shell and between thin draft tube and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102296227A CN103278285A (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102296227A CN103278285A (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103278285A true CN103278285A (en) | 2013-09-04 |
Family
ID=49060870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102296227A Pending CN103278285A (en) | 2013-06-08 | 2013-06-08 | Differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103278285A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101460A (en) * | 2014-07-21 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Housing of pressure difference sensor |
| CN104122029A (en) * | 2014-07-29 | 2014-10-29 | 广东科艺普实验室设备研制有限公司 | New-structured air pressure differential sensor assembly |
| CN104764560A (en) * | 2015-03-23 | 2015-07-08 | 凯龙高科技股份有限公司 | Differential pressure sensor |
| CN104775873A (en) * | 2015-03-20 | 2015-07-15 | 凯龙高科技股份有限公司 | Encapsulation protection structure of pressure difference sensor chip |
| CN105067181A (en) * | 2015-08-12 | 2015-11-18 | 凯龙高科技股份有限公司 | Gas differential pressure sensor |
| CN105509958A (en) * | 2014-10-20 | 2016-04-20 | 华记科技有限公司 | Ultra micro differential pressure gauge structure |
| CN107076630A (en) * | 2014-09-03 | 2017-08-18 | 韩国株式会社科迈特 | Differential pressure pick-up |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174158A (en) * | 1991-06-07 | 1992-12-29 | Maclean-Fogg Company | Resistive strain gauge pressure sensor |
| US20050103115A1 (en) * | 2002-05-25 | 2005-05-19 | Thomas Fessele | Pressure measuring device |
| CN101509817A (en) * | 2008-02-11 | 2009-08-19 | 森萨塔科技公司 | Differential fluid pressure measurement apparatus |
| CN201397208Y (en) * | 2009-05-08 | 2010-02-03 | 重庆市伟岸测器制造有限公司 | Pressure transmitter host |
| CN201600218U (en) * | 2009-12-18 | 2010-10-06 | 安徽科达自动化集团股份有限公司 | Post-type pressure difference transmitter |
| CN102323004A (en) * | 2011-06-01 | 2012-01-18 | 合肥望远电子科技有限公司 | A kind of switching value differential pressure pick-up |
| DE102011077686A1 (en) * | 2011-06-17 | 2012-12-20 | Robert Bosch Gmbh | Pressure measuring device |
| CN203310564U (en) * | 2013-06-08 | 2013-11-27 | 无锡隆盛科技股份有限公司 | Differential pressure sensor |
-
2013
- 2013-06-08 CN CN2013102296227A patent/CN103278285A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174158A (en) * | 1991-06-07 | 1992-12-29 | Maclean-Fogg Company | Resistive strain gauge pressure sensor |
| US20050103115A1 (en) * | 2002-05-25 | 2005-05-19 | Thomas Fessele | Pressure measuring device |
| CN101509817A (en) * | 2008-02-11 | 2009-08-19 | 森萨塔科技公司 | Differential fluid pressure measurement apparatus |
| CN201397208Y (en) * | 2009-05-08 | 2010-02-03 | 重庆市伟岸测器制造有限公司 | Pressure transmitter host |
| CN201600218U (en) * | 2009-12-18 | 2010-10-06 | 安徽科达自动化集团股份有限公司 | Post-type pressure difference transmitter |
| CN102323004A (en) * | 2011-06-01 | 2012-01-18 | 合肥望远电子科技有限公司 | A kind of switching value differential pressure pick-up |
| DE102011077686A1 (en) * | 2011-06-17 | 2012-12-20 | Robert Bosch Gmbh | Pressure measuring device |
| CN203310564U (en) * | 2013-06-08 | 2013-11-27 | 无锡隆盛科技股份有限公司 | Differential pressure sensor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101460A (en) * | 2014-07-21 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Housing of pressure difference sensor |
| CN104122029A (en) * | 2014-07-29 | 2014-10-29 | 广东科艺普实验室设备研制有限公司 | New-structured air pressure differential sensor assembly |
| CN104122029B (en) * | 2014-07-29 | 2016-09-28 | 广东科艺普实验室设备研制有限公司 | The differential pressure of atmospheric pressure sensor unit of new construction |
| CN107076630A (en) * | 2014-09-03 | 2017-08-18 | 韩国株式会社科迈特 | Differential pressure pick-up |
| CN105509958A (en) * | 2014-10-20 | 2016-04-20 | 华记科技有限公司 | Ultra micro differential pressure gauge structure |
| CN104775873A (en) * | 2015-03-20 | 2015-07-15 | 凯龙高科技股份有限公司 | Encapsulation protection structure of pressure difference sensor chip |
| CN104764560A (en) * | 2015-03-23 | 2015-07-08 | 凯龙高科技股份有限公司 | Differential pressure sensor |
| CN105067181A (en) * | 2015-08-12 | 2015-11-18 | 凯龙高科技股份有限公司 | Gas differential pressure sensor |
| CN105067181B (en) * | 2015-08-12 | 2017-11-28 | 凯龙高科技股份有限公司 | A kind of gas differential pressure sensor |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130904 |