CN102323004A - A kind of switching value differential pressure pick-up - Google Patents
A kind of switching value differential pressure pick-up Download PDFInfo
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- CN102323004A CN102323004A CN201110144849A CN201110144849A CN102323004A CN 102323004 A CN102323004 A CN 102323004A CN 201110144849 A CN201110144849 A CN 201110144849A CN 201110144849 A CN201110144849 A CN 201110144849A CN 102323004 A CN102323004 A CN 102323004A
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- pressure
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- connecting rod
- pressure sensitive
- diaphragm
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- 230000011664 signaling Effects 0.000 claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 10
- 206010008469 Chest discomfort Diseases 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VZOPRCCTKLAGPN-ZFJVMAEJSA-L potassium;sodium;(2r,3r)-2,3-dihydroxybutanedioate;tetrahydrate Chemical compound O.O.O.O.[Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O VZOPRCCTKLAGPN-ZFJVMAEJSA-L 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 229940074446 sodium potassium tartrate tetrahydrate Drugs 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to a kind of switching value differential pressure pick-up; Comprise housing and signaling control unit, said housing inner chamber is established high pressure chest and low-pressure cavity, establishes the first pressure sensitive diaphragm in the high pressure chest; Establish the second pressure sensitive diaphragm in the low-pressure cavity; Establish connecting rod between the said first pressure sensitive diaphragm and the second pressure sensitive diaphragm, the connecting rod two ends are attached to respectively on two diaphragms, and a wherein end of said connecting rod is established pressure value adjusting knob; Said signaling control unit is located in the automatically controlled chamber of housing, and signaling control unit comprises the induction microswitch that links to each other with the circuit function module, and the circuit function module is connected with central processing unit ECU through trigger circuit.The present invention can accurately gather the pressure drop of fluid passage components, exports reliable, simple tractable signal, only need drive pilot lamp, or pass to central processing unit ECU in certain some output indicator signal, and signal stabilization, simple, and not influenced by rugged surroundings.
Description
Technical field
The invention belongs to and be used for the precaution device that each parts pressure reduction of early warning fluid passage surpasses threshold value, especially a kind of design of each parts pressure reduction early warning sensor of low pressure oil circuit or gas circuit.But parts in the early warning fluid passage because of impurity accumulation or obstruction, cause the parts pressure drop to surpass threshold value, especially are fit to the early warning of automobile industry oil circuit component life.The output signal adopts make-and-break signal and the level signal that makes things convenient for host computer or ECU to detect.
Background technology
Normally used differential pressure pick-up is differential pressure transmitter again, mainly contains capacitance differential pressure cell, ceramic differential pressure pick-up, diffuse si differential pressure pick-up
Capacitance transducer has the sensory package of a variable capacitance. and this sensor is the assembly of a complete closed, and differential pressure passes to pressure-sensitive diaphragm through isolation diaphragm and filling liquid silicone oil and causes displacement. the milliampere level electric signal that the two-wire system that the capacitance difference between pressure-sensitive diaphragm and two capacitor plates is converted to by electronic unit is exported.
Erosion-resisting ceramic pressure sensor does not have the transmission of liquid; Pressure acts directly on the front surface of ceramic diaphragm; Make diaphragm produce small deformation, thick-film resistor is printed on the back side of ceramic diaphragm, connects into a Wheatstone bridge (closing bridge); Because the piezoresistive effect of voltage dependent resistor (VDR), the voltage signal that makes electric bridge produce a highly linear that is directly proportional with pressure, also be directly proportional with driving voltage.
Diffusion silicon pressure sensor; The pressure of measured medium directly acts on the diaphragm of sensor (stainless steel or pottery); Make diaphragm produce the micrometric displacement that is directly proportional with pressure medium; The resistance value of sensor is changed, detect this variation through electronic circuit, and canonical measure signal corresponding to this pressure of conversion output.
The piezoelectric that piezo-electric pressure sensor mainly uses includes quartz, sodium potassium tartrate tetrahydrate and phosphoric acid dihydro amine; Wherein quartzy (silicon dioxide) is a kind of mineral crystal; Piezoelectric effect finds that in this crystal within certain temperature range, piezoelectric properties exist always; But temperature surpasses after this scope, piezoelectric properties complete obiteration (this high temperature is exactly so-called " Curie point ").Because along with the changing electric field of stress changes small (just saying that also piezoelectric modulus is lower), so quartz is substituted by other piezoelectric crystal gradually.And sodium potassium tartrate tetrahydrate has very big piezoelectric susceptibility and piezoelectric modulus, but it can only can be used under the lower environment of room temperature and humidity ratio.
More than be many differential pressure pick-ups of knowing in the prior art, this type of sensor is analog quantity output, generally will gather and secondary development through AD, just can indicate differential pressure value, and because its manufacture craft has determined it to hold at high price; Simultaneously, the easy temperature influence of this type of sensor, and can not satisfy the requirement of some industries.
Summary of the invention
To the problem that exists in the above-mentioned prior art, the object of the present invention is to provide a kind of switching value differential pressure pick-up, it can accurately gather the pressure drop of fluid passage components, exports reliable, simple tractable signal.
The technical scheme that the present invention is taked for its purpose of realization: a kind of switching value differential pressure pick-up; Comprise housing and signaling control unit, it is characterized in that: said housing inner chamber is established high pressure chest and low-pressure cavity, establishes the first pressure sensitive diaphragm in the high pressure chest; Establish the second pressure sensitive diaphragm in the low-pressure cavity; Establish connecting rod between the said first pressure sensitive diaphragm and the second pressure sensitive diaphragm, the connecting rod two ends are attached to respectively on two diaphragms, and a wherein end of said connecting rod is established pressure value adjusting knob; Said signaling control unit is located in the automatically controlled chamber of housing, and signaling control unit comprises the induction microswitch that links to each other with the circuit function module, and the circuit function module is connected with central processing unit ECU through trigger circuit.
The present invention gathers the high and low pressure end pressure respectively by first and second pressure sensitive diaphragm, and logical overpressure value adjusting knob correction is regulated and set and trigger force value, when pressure reduction reaches setting value; By connecting rod conducting pressure vector, trigger the induction microswitch and calculate pressure reduction, when vector value surpasses threshold value by the circuit function module; Activate trigger circuit; Export tractable high and low level or make-and-break signal, drive peripheral circuit (like pilot lamp, central processing unit ECU).
Beneficial effect of the present invention: can accurately gather the pressure drop of fluid passage components, export reliable, simple tractable signal, only need drive pilot lamp, or pass to central processing unit ECU in certain some output indicator signal, signal stabilization, simple, and not influenced by rugged surroundings.
Description of drawings
Making the enforcement mode below in conjunction with accompanying drawing and tool is described further the present invention.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a circuit function module fundamental diagram.
1, the first pressure sensitive diaphragm among the figure, 2, the first pressure sensitive diaphragm, 3, the induction microswitch, 4, trigger circuit, 5, the circuit function module, 6, pressure value adjusting knob, 7, connecting rod.
Embodiment
As shown in Figure 1, the present invention includes housing and signaling control unit, housing adopts light materials such as plastics, alloy.Establish high pressure chest and low-pressure cavity in the housing, establish the first pressure sensitive diaphragm 1 in the high pressure chest, establish in the low-pressure cavity between the second pressure sensitive diaphragm, 2, the first pressure sensitive diaphragms 1 and the second pressure sensitive diaphragm 2 and establish connecting rod 7.Owing to have diaphragm and connecting rod to intercept, high pressure chest and low-pressure cavity isolated each other.Connecting rod 7 is the barbell shape, and connecting rod is the boundary with the central point, is divided into symmetrical two-section and combines (also can be divided into two sections by other unsymmetric forms, main consideration will be convenient to install).The disk end at connecting rod two ends is attached to respectively on two diaphragms.A wherein end of connecting rod 7 (end that promptly contacts with the second pressure sensitive diaphragm 2) is established pressure value adjusting knob 6.The first pressure sensitive diaphragm and the second pressure sensitive diaphragm can adopt ceramic diaphragm, silica gel diaphragm or nitrile rubber to add the cloth diaphragm.A kind of scalable switch that pressure value adjusting knob adopts Japanese Omron Corp to produce.
Signaling control unit is arranged in the automatically controlled chamber of housing, and signaling control unit comprises induction microswitch 3, and the induction microswitch is connected with circuit function module 5, and circuit function module 5 is connected through peripheral circuits such as trigger circuit 4 and central processing unit ECU.The induction microswitch is located at the inboard near the connecting rod other end.Trigger circuit 4 adopt and trigger the part structure.Circuit function module principle of work is as shown in Figure 2: after the pressure acquisition signal triggering is collected; Through the predetermined alarming value of master chip analyses and comparison; Whether or being defeated by its signal of interference analysis module analysis then is the wrong signal that causes owing to reasons such as other static of vibration; Through connector formal signal is exported to center ECU outward after analyzing, be shown to the operator by ECU again.
The present invention adopts general pipe adapter and engage thread to connect with pipeline, and the high and low pressure end is isolated mutually, only the conducting pressure vector; Fluid does not pass through from joint and cavity, and logical overpressure value adjusting knob is regulated and revised, and sets and triggers force value; When pressure reduction reaches setting value, trigger the induction microswitch and calculate pressure reduction, when vector value surpasses threshold value by the circuit function module; Activate trigger circuit, and then trigger electronic circuit, export tractable high and low level or make-and-break signal; Drive peripheral circuit, like pilot lamp, ECU.
For strengthening anti-interference and permanance, output short circuit protection circuit and anti-surge circuit design have been adopted in output to circuit.Principle of work of the present invention: fluid (water, oil or gas) is given the first pressure sensitive diaphragm and the first pressure sensitive diaphragm through high-low pressure end transmission pressure; And pressure collected pass to connecting rod; Will trigger the induction microswitch through connecting rod (adjusting of its predetermined value is regulated by pressure value adjusting knob); It is connected the back and sends trigger pip to the circuit function module; Through circuit analysis comparison predetermined value, exceeding predetermined value will give the automobile central disposal system through electric signal of trigger circuit output, and it is unusual to inform that the operator position occurs.
Claims (4)
1. switching value differential pressure pick-up; Comprise housing and signaling control unit, it is characterized in that: said housing inner chamber is established high pressure chest and low-pressure cavity, establishes the first pressure sensitive diaphragm in the high pressure chest; Establish the second pressure sensitive diaphragm in the low-pressure cavity; Establish connecting rod between the said first pressure sensitive diaphragm and the second pressure sensitive diaphragm, the connecting rod two ends are attached to respectively on two diaphragms, and a wherein end of said connecting rod is established pressure value adjusting knob; Said signaling control unit is located in the automatically controlled chamber of housing, and signaling control unit comprises the induction microswitch that links to each other with the circuit function module, and the circuit function module is connected with central processing unit ECU through trigger circuit.
2. switching value differential pressure pick-up according to claim 1 is characterized in that: said connecting rod is the barbell shape, is the two-section combined type.
3. switching value differential pressure pick-up according to claim 1 is characterized in that: the said first pressure sensitive diaphragm and the second pressure sensitive diaphragm adopt ceramic diaphragm, silica gel diaphragm or nitrile rubber to add the cloth diaphragm.
4. switching value differential pressure pick-up according to claim 1 is characterized in that: said trigger circuit adopt and trigger the part structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110144849A CN102323004A (en) | 2011-06-01 | 2011-06-01 | A kind of switching value differential pressure pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110144849A CN102323004A (en) | 2011-06-01 | 2011-06-01 | A kind of switching value differential pressure pick-up |
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| Publication Number | Publication Date |
|---|---|
| CN102323004A true CN102323004A (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110144849A Pending CN102323004A (en) | 2011-06-01 | 2011-06-01 | A kind of switching value differential pressure pick-up |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278285A (en) * | 2013-06-08 | 2013-09-04 | 无锡隆盛科技股份有限公司 | 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 |
| CN105628291A (en) * | 2016-03-10 | 2016-06-01 | 威卡自动化仪表（苏州）有限公司 | Double-diaphragm differential pressure measurement device |
| CN107068485A (en) * | 2017-06-08 | 2017-08-18 | 新界泵业集团股份有限公司 | A kind of pressure switch |
| CN107290083A (en) * | 2017-07-28 | 2017-10-24 | 佛山市川东磁电股份有限公司 | It is a kind of can one side encapsulation double membrane capacitance formula pressure sensors and preparation method |
| CN109974926A (en) * | 2019-05-06 | 2019-07-05 | 深圳市湃科集成技术有限公司 | Multi gear position exports differential pressure pickup |
| CN114856760A (en) * | 2022-05-12 | 2022-08-05 | 安庆中船柴油机有限公司 | Catalysis type particulate matter trap for purifying NOX and PM in coordination |
| CN115824317A (en) * | 2023-02-16 | 2023-03-21 | 四川新川航空仪器有限责任公司 | Multifunctional sensor |
| CN116164878A (en) * | 2023-02-01 | 2023-05-26 | 上海恒脉陶瓷技术有限公司 | Ceramic single-cavity capacitive differential pressure sensor and preparation method thereof |
| CN118294065A (en) * | 2024-06-06 | 2024-07-05 | 江天精密制造科技（苏州）有限公司 | A test device for measuring a sensor |
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| US3729997A (en) * | 1971-12-27 | 1973-05-01 | O Luke | Liquid level sensor |
| JPS5129674A (en) * | 1974-07-03 | 1976-03-13 | Girling Ltd | Saatsukeihoakuchueeta |
| US4081636A (en) * | 1976-03-03 | 1978-03-28 | Johnson Controls, Inc. | Differential pressure cutout switch |
| JPS61256234A (en) * | 1985-05-10 | 1986-11-13 | Yamatake Honeywell Co Ltd | Minute differential pressure detector |
| JPH04335124A (en) * | 1991-05-10 | 1992-11-24 | Asahi Enterp:Kk | Differential-pressure detector |
| DE4231374A1 (en) * | 1992-09-21 | 1994-03-24 | Gastechnic Prod Vertriebges | Method and device for controlling a gas flow |
| CN2872335Y (en) * | 2005-12-29 | 2007-02-21 | 宁波暐立精密机械有限公司 | Pressure-differential sensor |
| CN202126325U (en) * | 2011-06-01 | 2012-01-25 | 合肥望远电子科技有限公司 | Switching value differential pressure sensor |
-
2011
- 2011-06-01 CN CN201110144849A patent/CN102323004A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3729997A (en) * | 1971-12-27 | 1973-05-01 | O Luke | Liquid level sensor |
| JPS5129674A (en) * | 1974-07-03 | 1976-03-13 | Girling Ltd | Saatsukeihoakuchueeta |
| US4081636A (en) * | 1976-03-03 | 1978-03-28 | Johnson Controls, Inc. | Differential pressure cutout switch |
| JPS61256234A (en) * | 1985-05-10 | 1986-11-13 | Yamatake Honeywell Co Ltd | Minute differential pressure detector |
| JPH04335124A (en) * | 1991-05-10 | 1992-11-24 | Asahi Enterp:Kk | Differential-pressure detector |
| DE4231374A1 (en) * | 1992-09-21 | 1994-03-24 | Gastechnic Prod Vertriebges | Method and device for controlling a gas flow |
| CN2872335Y (en) * | 2005-12-29 | 2007-02-21 | 宁波暐立精密机械有限公司 | Pressure-differential sensor |
| CN202126325U (en) * | 2011-06-01 | 2012-01-25 | 合肥望远电子科技有限公司 | Switching value differential pressure sensor |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278285A (en) * | 2013-06-08 | 2013-09-04 | 无锡隆盛科技股份有限公司 | 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 |
| CN105628291A (en) * | 2016-03-10 | 2016-06-01 | 威卡自动化仪表（苏州）有限公司 | Double-diaphragm differential pressure measurement device |
| CN107068485A (en) * | 2017-06-08 | 2017-08-18 | 新界泵业集团股份有限公司 | A kind of pressure switch |
| CN107290083A (en) * | 2017-07-28 | 2017-10-24 | 佛山市川东磁电股份有限公司 | It is a kind of can one side encapsulation double membrane capacitance formula pressure sensors and preparation method |
| CN109974926B (en) * | 2019-05-06 | 2024-03-01 | 深圳市湃科集成技术有限公司 | Multi-gear output differential pressure sensor |
| CN109974926A (en) * | 2019-05-06 | 2019-07-05 | 深圳市湃科集成技术有限公司 | Multi gear position exports differential pressure pickup |
| CN114856760A (en) * | 2022-05-12 | 2022-08-05 | 安庆中船柴油机有限公司 | Catalysis type particulate matter trap for purifying NOX and PM in coordination |
| CN116164878A (en) * | 2023-02-01 | 2023-05-26 | 上海恒脉陶瓷技术有限公司 | Ceramic single-cavity capacitive differential pressure sensor and preparation method thereof |
| CN115824317B (en) * | 2023-02-16 | 2023-05-09 | 四川新川航空仪器有限责任公司 | Multifunctional sensor |
| CN115824317A (en) * | 2023-02-16 | 2023-03-21 | 四川新川航空仪器有限责任公司 | Multifunctional sensor |
| CN118294065A (en) * | 2024-06-06 | 2024-07-05 | 江天精密制造科技（苏州）有限公司 | A test device for measuring a sensor |
| CN118294065B (en) * | 2024-06-06 | 2024-11-08 | 江天精密制造科技（苏州）有限公司 | A test device for measuring a sensor |
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Application publication date: 20120118 |