CN201289420Y - Non-water-cooling superhigh temperature piezoelectric pressure sensor - Google Patents
Non-water-cooling superhigh temperature piezoelectric pressure sensor Download PDFInfo
- Publication number
- CN201289420Y CN201289420Y CNU2008201921403U CN200820192140U CN201289420Y CN 201289420 Y CN201289420 Y CN 201289420Y CN U2008201921403 U CNU2008201921403 U CN U2008201921403U CN 200820192140 U CN200820192140 U CN 200820192140U CN 201289420 Y CN201289420 Y CN 201289420Y
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- Prior art keywords
- core electrode
- sensitive element
- water
- superhigh temperature
- piezoelectric pressure
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- 238000001816 cooling Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 239000010445 mica Substances 0.000 claims abstract description 5
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 5
- 229910000154 gallium phosphate Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910001235 nimonic Inorganic materials 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 23
- 238000010586 diagram Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- LWFNJDOYCSNXDO-UHFFFAOYSA-K gallium;phosphate Chemical compound [Ga+3].[O-]P([O-])([O-])=O LWFNJDOYCSNXDO-UHFFFAOYSA-K 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a non-water cooling and ultra-high temperature piezoelectric type pressure sensor which comprises a main body at the front end, a connecting sleeve at the middle part and a TNC connector at the tail end. The pressure sensor is characterized in that a gallium phosphate single crystal is adopted as a sensitive element (6) of the pressure sensor; a hole is formed in the center of a core electrode (9); a core electrode wire (13) penetrates through the small hole and is welded with the core electrode (9); and the periphery of the sensitive element (6) is insulated by ceramic or mica. A diaphragm (7), the main body (5) and the core electrode (9) are made of heat-resistant steel; and the model number of the heat-resistant steel is NI-PH 1801, NI-P96HT or Nimonic90. The pressure sensor has wide frequency response range and long service life and can resist high temperature, so as to ensure that the nonlinearity of the sensor is less than 1 percent and the change of the sensibility is less than plus or minus 3 percent when the temperature is below 600 DEG C. The utility model satisfies the measuring requirements of indicator diagrams in the online type cylinders of large-scale internal-combustion engines, improves the management level of the large-scale internal-combustion engines, reduces the energy consumption and discharge and protects the environment.
Description
Technical field
The utility model relates to sensor, is a kind of non-water-cooled superhigh temperature piezoelectric pressure indicator specifically.
Background technology
Whether the research of large combustion machine, design, exploitation, management, maintenance need be measured the indoor gas pressure change process of combustion in IC engine, normal to judge internal combustion engine, prevent the energy consumption that abnormal course of work causes and the increase of pollution.
The indoor gas pressure measurement of combustion in IC engine mainly concentrates on following three aspects to the requirement of pressure transducer:
It at first is the working temperature of sensor.The maximum combustion temperature of combustion gas can be up to 1800 ℃ in the combustion chambers of internal combustion engines, gas maximum temperature at the pressure transducer diaphragm place also can reach 1000 ℃ (during detonation pressure 15Mpa), under non-water-cooled condition, after treating that the pressure transducer working temperature is stable, the working temperature of sensitive element is generally between 250 ℃ to 350 ℃, so the nominal operation temperature that is used to measure the sensor of combustion in IC engine chamber pressure must be higher than 350 ℃.
Next is the pressure transducer frequency response range.The fundamental frequency of the variation of combustion in IC engine chamber pressure is minimum to be 1Hz, in the combustion process high fdrequency component (as: pinking) can reach more than the 30kHz, so the Hz-KHz that is used to measure the pressure transducer of diesel indicating diagram must be greater than 30kHz.
Be that pressure transducer must have the sufficiently long life-span at last.According to usual pressure sensor 1 * 10
6Inferior round-robin designed life is on 500 rev/mins the four-stroke-cycle middling speed marine diesel at rotating speed, can only continuous working less than three days; So being used for the tonometric pressure transducer of combustion chambers of internal combustion engines (especially for the pressure transducer of online internal combustion engine load-position diagram monitoring system) must have the sufficiently long life-span.
The main product of pressure transducer is diffuse si (or sputtered silicon) piezoresistive pressure sensor at present, such pressure transducer sensitive element maximum operating temperature is not higher than 125 ℃, the highest frequency response generally is not higher than 3kHz, can not satisfy the test request of combustion in IC engine pressure fully.
Another kind of pressure sensing is a piezoelectric pressure indicator.Such pressure transducer frequency response can be up to hundreds of kHz, and according to different materials, the maximum operating temperature difference, the highest can continuous working in up to 600 ℃ environment.
Domestic piezoelectric pressure indicator is started in the seventies in last century, adopt the quartzy sensitive element, teflon done to do the pressure transducer maximum operating temperature that insulation material, ordinary elasticity material make as sensor outer housing and be not higher than 200 ℃, in order to satisfy the test request of internal combustion engine, in sensor, establish cooling water cavity, with recirculated water sensitive element is cooled off, the temperature maintenance that makes sensitive element is below 200 ℃.Such technology and product continue into the present always, do not break through.
GaPO has been succeeded in developing in last century end in Europe
4Monocrystalline is with GaPO
4Monocrystalline is a core, by a series of technical progress, at present senior engineer's temperature of piezoelectric pressure indicator can reach 600 ℃, sensitivity coefficient changes less than ± 2% in-50 ℃ to 550 ℃ scopes, frequency response is up to 130kHz, and reliability can satisfy the requirement of large ship internal combustion engine load-position diagram on-line continuous monitoring.
Summary of the invention
The purpose of this utility model provides a kind of non-water-cooled superhigh temperature piezoelectric pressure indicator that can satisfy the internal combustion engine environment.
Described non-water-cooled superhigh temperature piezoelectric pressure indicator, comprise the body of front end, the adapter sleeve at middle part and the TNC joint of tail end, the front end of body has diaphragm that sensitive element is encapsulated in the body, sensitive element is by the core electrode of fitting with it and be welded on core electrode line on the core electrode and pass adapter sleeve and connect the TNC joint signal wire is drawn, and it is characterized in that: adopt gallium orthophosphate as its sensitive element.
Described core electrode center is porose, and the core electrode line passes aperture and and core electrode welding.
Use pottery or mica insulation around the described sensitive element.
Described diaphragm, body and core electrode manufacturing materials adopt heat-resisting steel.
Described heat-resisting steel is NI-PH1801 or NI-P96HT or Nimonic90.
The minimum thickness of described diaphragm is greater than 0.5mm.
When described sensitive element was a slice sensitive element, core electrode adopted potsherd, had gold-platedly in the one side of this ceramic core electrode, and there is an aperture at its center, and the core electrode line passes aperture and has gold paste to be sintered to one with it.
The utility model pressure transducer frequency response range is wide.And can be high temperature resistant, the nonlinearity that guarantees sensor below 600 ℃ less than 1%, change of sensitivity is less than ± 3%.Satisfy load-position diagram Testing requirement in the online cylinder of large combustion machine, improve the management level of large combustion machine, cut down the consumption of energy and discharge, protected environment.
Description of drawings
Fig. 1 is the structural representation that the utility model adopts the sensing unit embodiment of Lazer,
Fig. 2 is the structural representation of heart yearn,
Fig. 3 is the structural representation that the utility model adopts single sensitive element embodiment.
Among the figure: 1-contact pin, 2-adapter sleeve, 3-splice insulation body, 4-adapter sleeve porcelain tube, 5-body, 6-sensitive element, 7-diaphragm, 8-ceramic insulation, 9-core electrode, 10-crystal pad, 11-front end porcelain tube, 12-body porcelain tube, 13-core electrode line, 14-TNC joint.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified: non-as shown in fig. 1 water-cooled superhigh temperature piezoelectric pressure indicator, comprise the body 5 of front end, the adapter sleeve 2 at middle part and the TNC joint 14 of tail end, the front end of body 5 has diaphragm 7 that sensitive element is encapsulated in the body 5, sensitive element 6 is by the core electrode 9 of fitting with it and be welded on core electrode line on the core electrode and pass adapter sleeve 2 and connect TNC joint 14 signal wire is drawn, and it is characterized in that: adopt gallium orthophosphate GaPO
4As its sensitive element 6.
As can be seen, core electrode 9 adopts in core electrode 9 central punch with core electrode line 13 in Fig. 2, and core electrode line 13 passes behind the aperture and core electrode 9 welded structure technologies again.
Use pottery or mica insulation around the described sensitive element 6.
Described diaphragm 7, body 5 and core electrode 9 manufacturing materials adopt heat-resisting steel, and described heat-resisting steel is NI-PH1801 or NI-P96HT or Nimonic 90.
The minimum thickness of described diaphragm 7 is greater than 0.5mm.
In Fig. 1,2 embodiment, adopt two sensitive elements 6, in Fig. 3, this sensor also can adopt a slice sensitive element 6, and at this moment, core electrode 9 adopts potsherds, and is gold-plated in the one side of ceramic core electrode 9, forms conductive layer; An aperture is made a call at ceramic core electrode 9 centers, and core electrode line 13 passes aperture, uses the gold paste sintering.
The utility model is used for and internal combustion (IC) engine cylinder internal procedure measurement mechanism, as: HCR2A electronic indicators etc. are supporting, and the cylinder internal procedure of large combustion machine is monitored.Adopt GaPO
4Monocrystalline does that materials such as sensitive material, high-purity pottery or mica are made insulating material, heat-resisting steel is made case material, adopt bulk structure to make non-water-cooled superhigh temperature piezoelectric pressure indicator, this sensor can the nonlinearity that guarantees sensor below 600 ℃ less than 1%, change of sensitivity is less than ± 3%, can satisfy its normal working temperature scope simultaneously, and frequency response range, and have sufficiently long serviceable life.
Claims (7)
1. non-water-cooled superhigh temperature piezoelectric pressure indicator, comprise the body of front end, the adapter sleeve at middle part and the TNC joint of tail end, the front end of body has diaphragm that sensitive element is encapsulated in the body, sensitive element is by the core electrode of fitting with it and be welded on core electrode line on the core electrode and pass adapter sleeve and connect the TNC joint signal wire is drawn, and it is characterized in that: adopt gallium orthophosphate as its sensitive element (6).
2. non-water-cooled superhigh temperature piezoelectric pressure indicator according to claim 1, it is characterized in that: described core electrode (9) center is porose, and core electrode line (13) passes aperture and and core electrode (9) welding.
3. non-water-cooled superhigh temperature piezoelectric pressure indicator according to claim 1, it is characterized in that: described sensitive element (6) is used pottery or mica insulation all around.
4. non-water-cooled superhigh temperature piezoelectric pressure indicator according to claim 1 is characterized in that: described diaphragm (7), body (5) and core electrode (9) manufacturing materials adopt heat-resisting steel.
5. non-water-cooled superhigh temperature piezoelectric pressure indicator according to claim 4 is characterized in that: described heat-resisting steel is NI-PH1801 or NI-P96HT or Nimonic 90.
6. according to claim 1 or 4 described non-water-cooled superhigh temperature piezoelectric pressure indicators, it is characterized in that: the minimum thickness of described diaphragm (7) is greater than 0.5mm.
7. non-water-cooled superhigh temperature piezoelectric pressure indicator according to claim 1, it is characterized in that: when described sensitive element is a slice sensitive element, core electrode (9) adopts potsherd, one side at this ceramic core electrode (9) has gold-plated, there is an aperture at its center, and core electrode line (13) passes aperture and has gold paste to be sintered to one with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201921403U CN201289420Y (en) | 2008-11-05 | 2008-11-05 | Non-water-cooling superhigh temperature piezoelectric pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201921403U CN201289420Y (en) | 2008-11-05 | 2008-11-05 | Non-water-cooling superhigh temperature piezoelectric pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201289420Y true CN201289420Y (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201921403U Expired - Lifetime CN201289420Y (en) | 2008-11-05 | 2008-11-05 | Non-water-cooling superhigh temperature piezoelectric pressure sensor |
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| CN (1) | CN201289420Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384715A (en) * | 2011-02-15 | 2012-03-21 | 谭成忠 | Piezoelectric current sensor |
| CN102778309A (en) * | 2012-08-09 | 2012-11-14 | 绵阳铭宇科技有限公司 | Piezoelectric pressure sensor with spherical induction head |
-
2008
- 2008-11-05 CN CNU2008201921403U patent/CN201289420Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384715A (en) * | 2011-02-15 | 2012-03-21 | 谭成忠 | Piezoelectric current sensor |
| CN102384715B (en) * | 2011-02-15 | 2015-12-30 | 谭成忠 | A kind of piezoelectric current sensor |
| CN102778309A (en) * | 2012-08-09 | 2012-11-14 | 绵阳铭宇科技有限公司 | Piezoelectric pressure sensor with spherical induction head |
| CN102778309B (en) * | 2012-08-09 | 2016-04-06 | 绵阳铭宇科技有限公司 | Spherical inductive head piezoelectric pressure indicator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090812 |