CN104697710A - Pressure sensor calibrating device using granular solid as medium - Google Patents
Pressure sensor calibrating device using granular solid as medium Download PDFInfo
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- CN104697710A CN104697710A CN201510075131.0A CN201510075131A CN104697710A CN 104697710 A CN104697710 A CN 104697710A CN 201510075131 A CN201510075131 A CN 201510075131A CN 104697710 A CN104697710 A CN 104697710A
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Abstract
The invention discloses a pressure sensor calibrating device using granular solid as a medium. The device comprises a transformer barrel of a cylindrical structure, a U-shaped cover which sleeves the top part of the transformer barrel, and a bottom cover arranged at the bottom part of the transformer barrel; a piston is arranged in the transformer barrel; a pressure cavity is formed through a cavity between the piston and the U-shaped cover; the cavity between the piston and the bottom cover forms a calibration cavity; the piston, the transformer barrel and the U-shaped cover are sealed through sealing rings; a pressurizing hole and a detecting hole are formed in the center of the U-shaped cover, wherein a standard pressure gauge or a pressure sensor can be mounted through the detecting hole; the pressurizing hole is connected with a hydraulic source through a pipeline; the bottom cover is fixedly connected with the wall of the transformer barrel; a calibrating hole for mounting the pressure sensor to be mounted is formed in the center of the bottom cover. The device has the advantages of being simple to operate, high in testing precision, and high in generality.
Description
Technical field
The present invention relates to a kind of sensor calibration apparatus, be specifically related to a kind of pressure sensor calibrating device being medium with graininess solid.
Background technology
At present in the pressure measurement of engineering practice and scientific research, the application of pressure transducer is very extensive.Pressure transducer not only for the measurement of hydrodynamic pressure, simultaneously also for the measurement of solids pressure, as in building and building trade to the pressure survey to agricultural product such as cereal in the measurement of soil pressure, agricultural.The mentality of designing of conventional pressure sensor is consistent with the measurement of principle of work and hydrodynamic pressure, and the measurement for the well-distributed pressure of fluid generation is accurate.And solid dielectric has graininess on thin sight, belong to discrete media, thus adopt pressure transducer to there is certain error to solids pressure measurement.For this reason, before the use except carrying out except hydraulic calibration to pressure transducer, the medium identical with tested solid dielectric also should be adopted to demarcate pressure transducer.At present conventional mainly strain-type and vibrating wire pressure sensor, the hydraulic calibration ratio of sensors with auxiliary electrode is easier to realize, and have relevant country and industry standard or standard, manufacturer also all can carry out hydraulic calibration according to specification or standard before product export.And proper device is not also had for the demarcation of solid dielectric, existing this type of caliberating device design is comparatively coarse, and just for some concrete test, versatility is not strong.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of pressure sensor calibrating device being medium with graininess solid, this device is simple to operate, measuring accuracy is high, versatility is better.
The technical solution adopted in the present invention is: a kind of pressure sensor calibrating device that is medium with graininess solid, the U-shaped lid comprise the transformation cylinder of tubular structure, being set in transformation cylinder top and the bottom be arranged on bottom transformation cylinder, also piston is provided with in described transformation cylinder, cavity between piston and U-shaped lid forms pressure chamber, cavity between piston and bottom is formed demarcates chamber, and all seals by arranging O-ring seal between piston and transformation cylinder and between U-shaped lid and transformation cylinder; The center of described U-shaped lid is provided with pressurization hole and can the detect aperture of installation code tensimeter or pressure transducer, pressurization hole is connected with hydraulic power source by pipeline, described bottom is fixedly connected with the barrel of transformation cylinder, and the center of bottom is provided with the demarcation hole can installing pressure transducer to be calibrated, demarcate hole for the female cylindrical hole of band.
Further optimization, the internal diameter of described transformation cylinder is at least the 2-3 of pressure transducer diameter to be calibrated doubly.
Further optimization, the height of described piston is not less than 0.5 times of its diameter.
Further optimization, described O-ring seal is embedded in the seal groove that arranges on piston side and transformation cylinder top.
Compared with prior art, the present invention at least has following advantage and beneficial effect:
Pressure sensor calibrating device provided by the invention for medium, requires low to surrounding environment with graininess solid, and versatility is better, and simple to operate, measuring accuracy is high; And structure of the present invention is simple, manufacture easily, with low cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
[main element symbol description]
1: transformation cylinder 2:U type lid
3: bottom 4: piston
5: pressure chamber 6: demarcate chamber
7: demarcate hole 8: pressurization hole
9: detect aperture.
Embodiment
For making content of the present invention become apparent, below in conjunction with specific embodiment, describe the present invention.
As shown in the figure, a kind of pressure sensor calibrating device that is medium with graininess solid, the bottom 3 comprising the transformation cylinder 1 of tubular structure, be set in the U-shaped lid 2 at transformation cylinder 1 top and be arranged on bottom transformation cylinder 1, piston 4 is also provided with in described transformation cylinder 1, cavity between piston 4 and U-shaped lid 2 forms pressure chamber 5, cavity between piston 4 and bottom 3 is formed demarcates chamber 6, and all seals by arranging O-ring seal between piston 4 and transformation cylinder 1 and between U-shaped lid 2 and transformation cylinder 1; The center of described U-shaped lid 2 is provided with pressurization hole 8 and can the detect aperture 9 of installation code tensimeter or pressure transducer, pressurization hole 8 is connected with hydraulic power source by pipeline, described bottom 3 is fixedly connected with the barrel of transformation cylinder 1, and the center of bottom 3 is provided with the demarcation hole 7 can installing pressure transducer to be calibrated, demarcate hole 7 for the female cylindrical hole of band.
In order to make the present invention have better result of use, the internal diameter of described transformation cylinder 1 is at least the 2-3 of pressure transducer diameter to be calibrated doubly.The height of described piston 4 is not less than 0.5 times of its diameter.Described O-ring seal is embedded in the seal groove that arranges on piston 4 side and transformation cylinder 1 top.
In the technical program, the O-ring seal of piston 4 side can be set to one, also can be two or more.Be provided with the screw consistent with transformation cylinder 1 length direction bottom the barrel of transformation cylinder 1, position corresponding with screw on bottom 3 is provided with through hole, is bolted to connection between transformation cylinder 1 and bottom 3, is threaded between transformation cylinder 1 with U-shaped lid 2.
The present embodiment is the demarcation carried out the miniature pressure cell of diameter 20mm, wherein transformation cylinder 1 internal diameter be 60mm, external diameter be 100mm, high be 80mm; Piston 4 is the solid cylinder of diameter 60mm, high 30mm, and outside is provided with seal groove.U-shaped lid 2 thickness is 15mm, and overall height is 60mm, and internal diameter is 100mm, and external diameter is 130mm, and bottom 3 is the plectane of diameter 100mm, thickness 20mm.
Using method of the present invention: first connected by pipeline and hydraulic power source in the pressurization hole 8 on U-shaped lid 2, then hydraulic power source adds water in pressure chamber 5, after having water to overflow in gaging hole 9 to be checked, at detect aperture 9 place sealing installation code tensimeter or pressure transducer.After installation, caliberating device is inverted, fills solid particle, as coal dust, sandy soil etc., till filling up to demarcation chamber 6.After filling up, demarcating the pressure transducer that in hole 7, installation is to be calibrated, again bottom 3 is bolted to connection afterwards.After installation, first pressurizeed to pressure chamber 5 by hydraulic power source, promote piston 4 and compress solid dielectric, when pressure transducer to be calibrated starts to stop pressurizeing and shedding pressure when producing reading change, leave standstill 5 minutes, complete the pretensioning operation of solid dielectric.And then pressurize step by step to pressure chamber 5, to complete the demarcation of pressure transducer to be calibrated.
Technical scheme cited by the present invention and embodiment be not restriction, be equal to the technical scheme cited by the present invention and embodiment or effect same approach all in the scope that the present invention protects.
Claims (4)
1. the pressure sensor calibrating device that is medium with graininess solid, it is characterized in that: the transformation cylinder (1) comprising tubular structure, be set in the U-shaped lid (2) at transformation cylinder (1) top and be arranged on the bottom (3) of transformation cylinder (1) bottom, piston (4) is also provided with in described transformation cylinder (1), cavity between piston (4) and U-shaped lid (2) forms pressure chamber (5), cavity between piston (4) and bottom (3) is formed demarcates chamber (6), and between piston (4) and transformation cylinder (1), and all seal by arranging O-ring seal between U-shaped lid (2) and transformation cylinder (1), the center of described U-shaped lid (2) is provided with pressurization hole (8) and can the detect aperture (9) of installation code tensimeter or pressure transducer, pressurization hole (8) is connected with hydraulic power source by pipeline, described bottom (3) is fixedly connected with the barrel of transformation cylinder (1), and the center of bottom (3) is provided with the demarcation hole (7) can installing pressure transducer to be calibrated, demarcate hole (7) for the female cylindrical hole of band.
2. a kind of pressure sensor calibrating device that is medium with graininess solid as claimed in claim 1, is characterized in that: the internal diameter of described transformation cylinder (1) is at least the 2-3 of pressure transducer diameter to be calibrated doubly.
3. a kind of pressure sensor calibrating device that is medium with graininess solid as claimed in claim 1, is characterized in that: the height of described piston (4) is not less than 0.5 times of its diameter.
4. a kind of pressure sensor calibrating device that is medium with graininess solid as claimed in claim 1, is characterized in that: described O-ring seal is embedded in the seal groove that arranges in piston (4) side and transformation cylinder (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510075131.0A CN104697710B (en) | 2015-02-12 | 2015-02-12 | A kind of pressure sensor calibrating device with graininess solid as medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510075131.0A CN104697710B (en) | 2015-02-12 | 2015-02-12 | A kind of pressure sensor calibrating device with graininess solid as medium |
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| Publication Number | Publication Date |
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| CN104697710A true CN104697710A (en) | 2015-06-10 |
| CN104697710B CN104697710B (en) | 2017-03-08 |
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| CN201510075131.0A Expired - Fee Related CN104697710B (en) | 2015-02-12 | 2015-02-12 | A kind of pressure sensor calibrating device with graininess solid as medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270994A (en) * | 2017-06-28 | 2017-10-20 | 防城港市长歧水利管理所 | A kind of water source supervising device |
| CN109029802A (en) * | 2018-09-29 | 2018-12-18 | 河北航科工程检测设备技术有限公司 | sensor and support |
| CN110017943A (en) * | 2019-05-05 | 2019-07-16 | 洛阳理工学院 | A kind of error correcting method of discrete media pressure measurement |
| CN114518194A (en) * | 2022-02-21 | 2022-05-20 | 中国第一汽车股份有限公司 | Pressure sensor detection equipment and detection method |
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| DE10018493C1 (en) * | 2000-04-14 | 2001-10-31 | Axel Poehls | Dynamic calibration device for piezoelectric pressure sensor uses signal from reference pressure sensor for regulating pressure in fluid-filled pressure chamber used for calibration |
| CN102494841A (en) * | 2011-12-26 | 2012-06-13 | 潍柴动力股份有限公司 | Pressure sensor calibration system |
| CN202453145U (en) * | 2011-12-23 | 2012-09-26 | 合肥工业大学 | Pressure oscillation demarcating device of pressure or differential pressure sensor |
| CN203534767U (en) * | 2013-11-06 | 2014-04-09 | 天津埃柯特测控技术有限公司 | Pressure sensor calibration device |
| CN204439277U (en) * | 2015-02-12 | 2015-07-01 | 洛阳理工学院 | A kind of pressure sensor calibrating device that is medium with graininess solid |
-
2015
- 2015-02-12 CN CN201510075131.0A patent/CN104697710B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10018493C1 (en) * | 2000-04-14 | 2001-10-31 | Axel Poehls | Dynamic calibration device for piezoelectric pressure sensor uses signal from reference pressure sensor for regulating pressure in fluid-filled pressure chamber used for calibration |
| CN202453145U (en) * | 2011-12-23 | 2012-09-26 | 合肥工业大学 | Pressure oscillation demarcating device of pressure or differential pressure sensor |
| CN102494841A (en) * | 2011-12-26 | 2012-06-13 | 潍柴动力股份有限公司 | Pressure sensor calibration system |
| CN203534767U (en) * | 2013-11-06 | 2014-04-09 | 天津埃柯特测控技术有限公司 | Pressure sensor calibration device |
| CN204439277U (en) * | 2015-02-12 | 2015-07-01 | 洛阳理工学院 | A kind of pressure sensor calibrating device that is medium with graininess solid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270994A (en) * | 2017-06-28 | 2017-10-20 | 防城港市长歧水利管理所 | A kind of water source supervising device |
| CN109029802A (en) * | 2018-09-29 | 2018-12-18 | 河北航科工程检测设备技术有限公司 | sensor and support |
| CN110017943A (en) * | 2019-05-05 | 2019-07-16 | 洛阳理工学院 | A kind of error correcting method of discrete media pressure measurement |
| CN110017943B (en) * | 2019-05-05 | 2021-02-26 | 洛阳理工学院 | Error correction method for discrete medium pressure measurement |
| CN114518194A (en) * | 2022-02-21 | 2022-05-20 | 中国第一汽车股份有限公司 | Pressure sensor detection equipment and detection method |
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| Publication number | Publication date |
|---|---|
| CN104697710B (en) | 2017-03-08 |
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