CN100408992C - Experimental pressure measuring device in adverse environment - Google Patents
Experimental pressure measuring device in adverse environment Download PDFInfo
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- CN100408992C CN100408992C CNB2006100097958A CN200610009795A CN100408992C CN 100408992 C CN100408992 C CN 100408992C CN B2006100097958 A CNB2006100097958 A CN B2006100097958A CN 200610009795 A CN200610009795 A CN 200610009795A CN 100408992 C CN100408992 C CN 100408992C
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Abstract
The present invention provides an experimental pressure measuring device in an adverse environment. The present invention comprises a heated body, wherein an air inlet is arranged on the heated body, an air duct is connected with the upper part of the air inlet, the air duct is positioned in a water-in component and a water-out component, the water-in component is provided with a water inlet hole and a water channel, and the water-out component is provided with a water outlet hole and a water channel. The water-in component, the water-out component and the heated body are connected with one another; a dash board is arranged in each water channel which is divided into an internal channel and an external channel by the dash board; the back part of the air duct is connected with an air pressure sensor which can convert air pressure signals to analog voltage signals, the analog voltage signals are converted to digital signals by an analog electric quantity collecting device, and the digital signals are uploaded to a computer through a photoelectric isolation device according to the RS-485 asynchronous serial communication rule through a signal line. The present invention can normally work under the environment of superhigh temperature, strong electricity and large disturbance. The experiment shows that the present invention can take real-time measurements of flow field pressure under 4MPa at the fastest speed of ten times per second, and the system error is about two grades under the adverse environment of 10000VAC, 2500DEG C. to 3000DEG C., strong electromagnetic interference and existing in more than one time of sound velocity air flow.
Description
(1) technical field
What the present invention relates to is a kind of device for pressure measurement, specifically a kind of can be in high temperature, forceful electric power and strongly disturbing environment, the device that the superhigh temperature arc pressure is measured.
(2) background technology
With the plasma arc well heater is in the heat resistant material ground experimental system for simulating of core, and the pressure of experiment electric arc is very significant for the influence of experimental result.Analyze the ablation property of the ablative mechanism and the examination test specimen of test specimen, crucial during to the measurement of arc pressure in the experimentation.But; experimentation ionic medium body arc temperature is up to 2500-3000 ℃; the well heater operating voltage is in the 3000-10000VAC scope; because its three-phase neutral point of well heater oneself requirement can not ground protection; and because the voltage of physical condition restriction (well heater imbalance of three-phase voltage) its theoretical neutral point is non-vanishing; well heater causes the fluid field pressure measurement mechanism to be in a superhigh temperature, forceful electric power and the big environment that disturbs starting and stop the time space electromagnetic field formation electromagnetic interference (EMI) that can have greatly changed.To in abominable like this flow field environment, realize the measurement of electric arc fluid field pressure, now the means that generally the adopt mechanical parameter that is aided with the well heater gas circuit for the HEATER FOR MEASURING bleed pressure calculates and tentatively obtains the electric arc fluid field pressure, but this method be a large amount of extraneous factors to influence precision quite low.
(3) summary of the invention
Goal of the invention of the present invention be to provide a kind of can be in superhigh temperature, forceful electric power, the big flow field environment that disturbs, stream field pressure carries out experimental pressure measuring device in the rugged surroundings of high-acruracy survey.
The object of the present invention is achieved like this: it comprises heated body, have air admission hole on the heated body, be connected with wireway on the air admission hole, described heated body is a circular copper member that has interlayer, the member center has described air admission hole, the corresponding position of member afterbody and air admission hole is with screw thread and is used for fixing and is similarly wireway made of copper, wireway is arranged in by water inlet part that has inlet opening and water stream channel and the water outlet part that has apopore and water stream channel, the water inlet part, water outlet part and heated body interconnect, be provided with in the water stream channel water stream channel is separated in, the manger board of outer tunnel, connect the gas pressure sensor that air pressure signal can be converted to analog voltage signal behind the wireway, analog voltage signal converts digital signal to by the simulation electric quantity collector, and digital signal is through being uploaded to computing machine by RS-485 asynchronous serial communication criterion through signal wire behind the optical isolation.Be connected with polyethylene pipe between wireway and the gas pressure sensor.
High temperature and high pressure gas in the flow field enters wireway by the cooling of heated body, further cooled gas by wireway enters the polyethylene pipe of wireway end and finally enters gas pressure sensor, gas pressure sensor converts air pressure signal to analog voltage signal, analog voltage signal converts thereof into digital signal by the simulation electric quantity collector, and digital signal is through being uploaded to the unified processing of computing machine for operating personnel's reference by RS-485 asynchronous serial communication criterion through signal wire behind the optical isolation.Entire measuring device adopts the water-cooling pattern cooling, and chilled water to entering after gas cools off in the wireway in the heated body interlayer, passes through the water deflector outside by water outlet part separating device through the water deflector inboard by water inlet part access to plant again.
The present invention has following major technique feature:
1, described heated body is a circular copper member that has interlayer, and change at the member center has aperture, member afterbody and the corresponding position of front end aperture to be with screw thread to be used for fixing and to be similarly wireway made of copper.The interlayer of heated body is a hollow, and cavity accounts for its integrally-built overwhelming majority, makes things convenient for flow of cooling water and to the cooling of heated body front end face, make whole device can be in hyperthermal environments operate as normal.
2, the present invention will install inner chamber by water deflector and be divided into two, make the chilled water of access to plant further to cool off the gas through the preliminary cooling of heated body in the wireway earlier, and then enter the heated body interlayer it cooled off, at last through a large amount of heat exchange cause chilled water that temperature raises via the water deflector outside by water outlet part separating device.Such design makes chilled water be fully utilized, and whole device can be issued to the abundant cooling of self and its internal gas in the prerequisite that does not need very big cooling water flow, has improved the practicality of device greatly and has reduced experimental cost.
3, the present invention has realized that by optical isolation the physics between computing machine and the signals collecting loop cuts off; not only eliminated the noise voltage interference effectively; and solved problems such as long line driving and impedance matching effectively, can when the equipment under test short circuit, protection system not be damaged simultaneously yet.
The present invention is by water inlet part, water outlet part, water deflector and heated body constituent apparatus chilled(cooling) water return (CWR).Chilled water under the room temperature state is through water inlet part access to plant inside, at first to cooling off through the relatively low gas of heated part initial coolant temperature in the wireway, temperature rises to some extent behind the wireway the chilled water of flowing through enters the heated body internal cavities the higher relatively heated body of temperature is cooled off, chilled water rises sharply through temperature after carrying out sufficient heat interchange with it in the heated body cavity, flows through the water deflector outside by water outlet part discharger after the high-temperature cooling water of finishing the cooling task leaves heated body.Chilled water can be up to 40-60C through leaving water temperature after the inner sufficient heat exchange of device.2500-3000 ℃ the gas temperature of superhigh temperature gas stream through entering gas pressure sensor behind this device is between 20-30 ℃ in the flow field.
Gas passage of the present invention is by wireway, and polyethylene pipe and gas pressure sensor constitute jointly.Air communication in the flow field enters wireway after crossing heated body, and gas enters gas pressure sensor through polyethylene pipe after fully cooling off in wireway.Between wireway and gas pressure sensor, add insulativity and the toughness that polyethylene pipe can make full use of polyethylene pipe; make on the one hand gaseous tension acquisition circuit and device be exposed between the part in the forceful electric power flow field to link to each other and protected harvester that the toughness of polyethylene pipe is that the integral installation and the maintenance of device brought convenience on the other hand by the superior isolation body.
Connect up to the optical isolation that insulate more than the 10000VAC on the communication line between signal pickup assembly and the computing machine; in system's thermometric process; if thermocouple measurement end protective seam lost efficacy, spacer assembly can effectively protect central computer and operating personnel to be unlikely to touch 10000V high-tension electricity in the test environment.
The present invention can be in superhigh temperature, operate as normal in forceful electric power and the big interference environment.Our experiments show that the present invention is at 10000VAC, 2500-3000 ℃, strong electromagnetic exists in the rugged surroundings of velocity of sound air-flow more than a times, with the speed of the fastest 10 times/S the fluid field pressure below the 4MPa is measured in real time, and systematic error is at 2 grades of left stones.
(4) description of drawings
Accompanying drawing is a structural representation of the present invention.
(5) embodiment
For a more detailed description to the present invention for example below in conjunction with accompanying drawing:
The composition of experimental pressure measuring device comprises heated body 1 in the rugged surroundings, have air admission hole on the heated body, be connected with wireway 5 on the air admission hole, wireway is arranged in by water inlet part 4 that has inlet opening and water stream channel and the water outlet part 3 that has apopore and water stream channel, the water inlet part, water outlet part and heated body interconnect, be provided with in the water stream channel water stream channel is separated in, the manger board 2 of outer tunnel, connect the gas pressure sensor 7 that air pressure signal can be converted to analog voltage signal behind the wireway, analog voltage signal converts digital signal to by the simulation electric quantity collector, and digital signal is uploaded to computing machine by RS-485 asynchronous serial communication criterion through signal wire through optical isolation 8 backs.Be connected with polyethylene pipe 6 between wireway and the gas pressure sensor.
Chilled water under the room temperature state is through water inlet part 4 access to plant inside; Chilled water is at first to cooling off through the relatively low gas of heated part 1 initial coolant temperature in the wireway 5; The chilled water that the wireway 5 back temperature of flowing through rise to some extent enters heated body 1 internal cavities the higher relatively heated body of temperature is cooled off; The cooling water flow of finishing the cooling task through water deflector 2 outsides by water outlet part 3 dischargers; Air communication in the flow field enters wireway 5 after crossing heated body 1; Gas enters gas pressure sensor 7 through polyethylene pipe 6 after fully cooling off in wireway 5; Gas pressure sensor 7 transforms into digital voltage signal with air pressure signal and passes to the unified processing of host computer through optical isolation 8.
Claims (2)
1. experimental pressure measuring device in the rugged surroundings, it comprises heated body, it is characterized in that: have air admission hole on the heated body, be connected with wireway on the air admission hole, described heated body is a circular copper member that has interlayer, the member center has described air admission hole, the corresponding position of member afterbody and air admission hole is with screw thread and is used for fixing and is similarly wireway made of copper, wireway is arranged in by water inlet part that has inlet opening and water stream channel and the water outlet part that has apopore and water stream channel, the water inlet part, water outlet part and heated body interconnect, be provided with in the water stream channel water stream channel is separated in, the manger board of outer tunnel, connect the gas pressure sensor that air pressure signal can be converted to analog voltage signal behind the wireway, analog voltage signal converts digital signal to by the simulation electric quantity collector, and digital signal is through being uploaded to computing machine by RS-485 asynchronous serial communication criterion through signal wire behind the optical isolation.
2. experimental pressure measuring device in the rugged surroundings according to claim 1 is characterized in that: be connected with polyethylene pipe between wireway and the gas pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100097958A CN100408992C (en) | 2006-03-10 | 2006-03-10 | Experimental pressure measuring device in adverse environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100097958A CN100408992C (en) | 2006-03-10 | 2006-03-10 | Experimental pressure measuring device in adverse environment |
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| Publication Number | Publication Date |
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| CN1818591A CN1818591A (en) | 2006-08-16 |
| CN100408992C true CN100408992C (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100097958A Expired - Fee Related CN100408992C (en) | 2006-03-10 | 2006-03-10 | Experimental pressure measuring device in adverse environment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441114B (en) * | 2008-04-11 | 2010-07-14 | 哈尔滨工业大学 | Heat flow and kinetic pressure composite test device of plasma jet flow field |
| CN102012297A (en) * | 2010-11-23 | 2011-04-13 | 上海工程技术大学 | Pressure measuring device and method for high temperature medium |
| CN114264493A (en) * | 2021-12-09 | 2022-04-01 | 中国航天空气动力技术研究院 | Multipurpose water-cooling stagnation point measuring probe for pneumatic heat ground simulation test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1317050A (en) * | 1970-10-23 | 1973-05-16 | Mansfeld Kombinat W Pieck Veb | Electrical discharge system for use with oxidising gases |
| CN2108293U (en) * | 1991-11-30 | 1992-06-24 | 王兴雅 | Capacitance-resistance pressure gauge saver |
| CN2159561Y (en) * | 1993-05-07 | 1994-03-23 | 孙伯光 | High temp. pressure sensor |
| CN1461406A (en) * | 2001-02-20 | 2003-12-10 | 罗伯特-博希股份公司 | Pressure sensor module |
| CN2757107Y (en) * | 2004-12-03 | 2006-02-08 | 浙江天信仪表有限公司 | High temperature gas pressure taking device |
-
2006
- 2006-03-10 CN CNB2006100097958A patent/CN100408992C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1317050A (en) * | 1970-10-23 | 1973-05-16 | Mansfeld Kombinat W Pieck Veb | Electrical discharge system for use with oxidising gases |
| CN2108293U (en) * | 1991-11-30 | 1992-06-24 | 王兴雅 | Capacitance-resistance pressure gauge saver |
| CN2159561Y (en) * | 1993-05-07 | 1994-03-23 | 孙伯光 | High temp. pressure sensor |
| CN1461406A (en) * | 2001-02-20 | 2003-12-10 | 罗伯特-博希股份公司 | Pressure sensor module |
| CN2757107Y (en) * | 2004-12-03 | 2006-02-08 | 浙江天信仪表有限公司 | High temperature gas pressure taking device |
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| Publication number | Publication date |
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| CN1818591A (en) | 2006-08-16 |
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