JPH10132676A - Dynamic pressure measuring apparatus in piping - Google Patents
Dynamic pressure measuring apparatus in pipingInfo
- Publication number
- JPH10132676A JPH10132676A JP29164796A JP29164796A JPH10132676A JP H10132676 A JPH10132676 A JP H10132676A JP 29164796 A JP29164796 A JP 29164796A JP 29164796 A JP29164796 A JP 29164796A JP H10132676 A JPH10132676 A JP H10132676A
- Authority
- JP
- Japan
- Prior art keywords
- piping
- strain
- dynamic pressure
- measured
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ロケット推進薬供
給配管内流体の動的圧力計測等に用いられる配管内の動
的圧力計測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic pressure measuring device in a pipe used for measuring dynamic pressure of a fluid in a rocket propellant supply pipe.
【０００２】[0002]
【従来の技術，発明が解決しようとする課題】従来，ロ
ケット推進薬供給配管内の動的圧力計測には、配管に圧
力センサが装着される専用のポートを設け、また圧力セ
ンサが装着された際に圧力センサのセンシング面が配管
内径と接している位置にする必要があった。2. Description of the Related Art Conventionally, for dynamic pressure measurement in a rocket propellant supply pipe, a dedicated port for mounting a pressure sensor is provided on the pipe and a pressure sensor is mounted. At this time, it was necessary to set the sensing surface of the pressure sensor at a position in contact with the inner diameter of the pipe.
【０００３】この従来の配管内の動的圧力計測装置で
は、計測対象が極低温流体の場合には圧力センサに対し
制約があり、圧電型センサを使用する必要が生じてい
る。In the conventional dynamic pressure measuring device in a pipe, when a measurement target is a cryogenic fluid, there is a restriction on a pressure sensor, and it is necessary to use a piezoelectric sensor.
【０００４】圧電型センサの場合、センサ素子の原理
上、静的圧力を計測するのは不可能であり、また、特に
校正をする際に特殊な器材を必要とし、校正値はメーカ
に頼るしかない。In the case of a piezoelectric sensor, it is impossible to measure a static pressure due to the principle of the sensor element. In addition, special equipment is required especially for calibration, and the calibration value depends on the manufacturer. Absent.
【０００５】本発明は、以上の問題点を解決することが
できる配管内の動的圧力計測装置を提供しようとするも
のである。An object of the present invention is to provide a dynamic pressure measuring device in a pipe capable of solving the above problems.
【０００６】[0006]
【課題を解決するための手段】本発明の配管内の動的圧
力計測装置は、配管外表面に歪ゲージを取付けたことを
特徴とする。According to the present invention, there is provided an apparatus for measuring dynamic pressure in a pipe, wherein a strain gauge is attached to an outer surface of the pipe.
【０００７】本発明では、配管外表面に歪ゲージを取付
けているので、動的圧力を計測するために配管にそれ専
用のポートを用ける必要がない。また、歪ゲージにより
配管外表面の歪の計測を行なっているので、静的圧力も
計測可能であり、かつ、この際に動的圧力の計測を行な
うと、同位置で静的圧力が計測されるので、配管に実負
荷圧力を与え、歪量との関係データを取得しそれを校正
値として扱うことができる。In the present invention, since the strain gauge is attached to the outer surface of the pipe, it is not necessary to use a dedicated port for the pipe in order to measure the dynamic pressure. In addition, since the strain on the outer surface of the pipe is measured by a strain gauge, static pressure can be measured, and when dynamic pressure is measured at this time, static pressure is measured at the same position. Therefore, it is possible to apply the actual load pressure to the pipe, obtain data relating to the amount of strain, and treat the data as a calibration value.
【０００８】極低温下での歪計測に関しては、強度試験
で実績のある歪ゲージを採用することにより問題はな
い。[0008] Regarding strain measurement at extremely low temperatures, there is no problem by employing a strain gauge that has been used in strength tests.
【０００９】更に、圧力と歪の関係は直線性を持たない
と予想されるが、これは多項式近似で補正可能であり、
かつ、データをＰＣ（パソコン）に取込み、その中で物
理量の変換処理することが可能である。Further, the relationship between pressure and strain is not expected to have linearity, but this can be corrected by polynomial approximation.
In addition, it is possible to take data into a PC (personal computer) and convert the physical quantity therein.
【００１０】本発明では、配管の外表面の歪ゲージによ
って計測して配管の外表面を圧力ゲージのダイヤフラム
として使うということになるが、薄肉である宇宙機器等
の配管では、圧力変動に応じて歪量を十分に計測するこ
とができる。In the present invention, the outer surface of the pipe is measured by a strain gauge on the outer surface of the pipe, and the outer surface of the pipe is used as a diaphragm of the pressure gauge. The distortion amount can be sufficiently measured.
【００１１】[0011]
【発明の実施の形態】本発明の実施の一形態を、図１に
よって説明する。３は宇宙機器用等の薄肉の配管であ
り、その外表面には歪ゲージ１が取付けられており、同
歪ゲージ１は歪用アンプ２に接続され、歪用アンプ２は
データ処理用ＰＣ（パソコン）８に接続されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. Reference numeral 3 denotes a thin-walled pipe for space equipment or the like, and a strain gauge 1 is attached to an outer surface thereof. The strain gauge 1 is connected to a strain amplifier 2, and the strain amplifier 2 is connected to a data processing PC ( PC 8).
【００１２】また、歪ゲージ１に近接して配管３の外表
面には温度センサ６が取付けられ、同温度センサ６は温
度センサ用アンプ７に接続され、温度センサ用アンプ７
はデータ処理用ＰＣ８に接続されている。A temperature sensor 6 is attached to the outer surface of the pipe 3 in proximity to the strain gauge 1, and the temperature sensor 6 is connected to a temperature sensor amplifier 7, and a temperature sensor amplifier 7
Is connected to the data processing PC 8.
【００１３】配管３の歪ゲージ１の反対側には、必要に
応じて、配管３内の静的圧力を計測する圧力センサ５に
接続された圧力センサ用ポート４が設けられている。On the opposite side of the strain gauge 1 of the pipe 3, a pressure sensor port 4 connected to a pressure sensor 5 for measuring a static pressure in the pipe 3 is provided as necessary.
【００１４】本実施の形態では、配管３内の流体の動的
圧力によって配管３に歪が発生し、これがポートを設け
ることなく歪ゲージ１によって計測され、配管３内の流
体の動的圧力をデータ処理用ＰＣ８で計測することがで
きる。In the present embodiment, a strain is generated in the pipe 3 due to the dynamic pressure of the fluid in the pipe 3, and this is measured by the strain gauge 1 without providing a port, and the dynamic pressure of the fluid in the pipe 3 is measured. It can be measured by the data processing PC 8.
【００１５】この場合、予め求められた温度と歪量の関
係式によって、歪ゲージ１によって計測された歪量を温
度センサ６が検出した流体の温度に従ってデータ処理用
ＰＣ８において補正して、正確な配管３内の動的圧力を
計測することができる。In this case, the strain amount measured by the strain gauge 1 is corrected by the data processing PC 8 in accordance with the temperature of the fluid detected by the temperature sensor 6 according to the relational expression between the temperature and the strain amount which is obtained in advance, and an accurate The dynamic pressure in the pipe 3 can be measured.
【００１６】以上の通り、本実施の形態では、動的圧力
を計測するために配管３にそれ専用のポートを設ける必
要がない。また、歪ゲージ１による歪の計測によって静
的圧力も計測可能であり、かつ、動的圧力の計測を行な
うと同位置で静的圧力が計測されるので、配管３に実負
荷圧力を与え、歪量との関係データを取得しそれを校正
値として扱うことができる。As described above, in the present embodiment, it is not necessary to provide a dedicated port in the pipe 3 for measuring the dynamic pressure. In addition, the static pressure can be measured by measuring the strain with the strain gauge 1, and the static pressure is measured at the same position when the dynamic pressure is measured. Data related to the amount of distortion can be obtained and used as a calibration value.
【００１７】また、極低温下での歪計測に関しては、強
度試験で実績のある歪ゲージ１を採用することにより問
題はない。In addition, there is no problem with respect to strain measurement at extremely low temperatures by employing the strain gauge 1 which has been used in strength tests.
【００１８】更に、圧力と歪の関係は直線性を持たない
と予想されるが、これは多項式近似で補正可能であり、
かつ、データをデータ処理用ＰＣ８に取込み、その中で
物理量変換処理することが可能である。Furthermore, the relationship between pressure and strain is not expected to have linearity, which can be corrected by polynomial approximation.
In addition, it is possible to take in data into the data processing PC 8 and perform physical quantity conversion processing therein.
【００１９】本実施の形態では、以上の通り、配管３の
外表面を圧力ゲージ１のダイヤフラムとして使うという
ことになるが、薄肉である宇宙機器等の配管では、圧力
変動に応じて歪量を十分に計測することができる。In the present embodiment, as described above, the outer surface of the pipe 3 is used as the diaphragm of the pressure gauge 1. However, in a thin pipe of space equipment or the like, the amount of strain is reduced according to the pressure fluctuation. It can be measured sufficiently.
【００２０】[0020]
【発明の効果】以上説明したように、本発明では、動的
圧力計測のための配管のポートが不要となる。また、静
的成分の圧力も計測されるのでその値を参照することが
できる。As described above, the present invention eliminates the need for a piping port for dynamic pressure measurement. Further, since the pressure of the static component is also measured, the value can be referred to.
【図１】本発明の実施の一形態の概略図である。FIG. 1 is a schematic diagram of an embodiment of the present invention.
１ 歪ゲージ ２ 歪用アンプ ３ 配管 ４ 圧力センサ用ポート ５ 圧力センサ ６ 温度センサ ７ 温度センサ用アンプ ８ データ処理用ＰＣ DESCRIPTION OF SYMBOLS 1 Strain gauge 2 Strain amplifier 3 Piping 4 Pressure sensor port 5 Pressure sensor 6 Temperature sensor 7 Temperature sensor amplifier 8 Data processing PC
Claims (1)
徴とする配管内の動的圧力計測装置。1. A dynamic pressure measuring device in a pipe, wherein a strain gauge is attached to an outer surface of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29164796A JPH10132676A (en) | 1996-11-01 | 1996-11-01 | Dynamic pressure measuring apparatus in piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29164796A JPH10132676A (en) | 1996-11-01 | 1996-11-01 | Dynamic pressure measuring apparatus in piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10132676A true JPH10132676A (en) | 1998-05-22 |
Family
ID=17771663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29164796A Withdrawn JPH10132676A (en) | 1996-11-01 | 1996-11-01 | Dynamic pressure measuring apparatus in piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10132676A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003344363A (en) * | 2002-05-30 | 2003-12-03 | Ishikawajima Harima Heavy Ind Co Ltd | Method of judging flow pattern of vapor-liquid two-phase flow |
| JP2009210042A (en) * | 2008-03-05 | 2009-09-17 | Shikoku Res Inst Inc | Actuated valve diagnosis device using outer surface condition detecting sensor |
| EP2437040A1 (en) | 2010-10-01 | 2012-04-04 | Jasco Corporation | Device for measuring small pressure differences |
| JP2015114191A (en) * | 2013-12-11 | 2015-06-22 | 国立研究開発法人産業技術総合研究所 | Mass flowmeter |
| JP2016118505A (en) * | 2014-12-22 | 2016-06-30 | 国立研究開発法人産業技術総合研究所 | Flowmeter |
| JP2017049125A (en) * | 2015-09-02 | 2017-03-09 | 国立研究開発法人産業技術総合研究所 | Flowmeter |
| WO2019231251A1 (en) * | 2018-05-30 | 2019-12-05 | 한국기계연구원 | Pipe damage detection apparatus, pipe damage detection system using same and pipe damage detection method using same |
| US20210131898A1 (en) * | 2019-10-31 | 2021-05-06 | DJ Instruments | Temperature compensation of strain gauge output |
| KR102248241B1 (en) * | 2019-12-06 | 2021-05-06 | (주)리잰 | Pipe Kit to prevent pressure transmitter port blockage |
-
1996
- 1996-11-01 JP JP29164796A patent/JPH10132676A/en not_active Withdrawn
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003344363A (en) * | 2002-05-30 | 2003-12-03 | Ishikawajima Harima Heavy Ind Co Ltd | Method of judging flow pattern of vapor-liquid two-phase flow |
| JP2009210042A (en) * | 2008-03-05 | 2009-09-17 | Shikoku Res Inst Inc | Actuated valve diagnosis device using outer surface condition detecting sensor |
| EP2437040A1 (en) | 2010-10-01 | 2012-04-04 | Jasco Corporation | Device for measuring small pressure differences |
| JP2012078210A (en) * | 2010-10-01 | 2012-04-19 | Jasco Corp | Minute capacity pressure gauge |
| US8863578B2 (en) | 2010-10-01 | 2014-10-21 | Jasco Corporation | Very-small-capacity pressure gauge |
| JP2015114191A (en) * | 2013-12-11 | 2015-06-22 | 国立研究開発法人産業技術総合研究所 | Mass flowmeter |
| JP2016118505A (en) * | 2014-12-22 | 2016-06-30 | 国立研究開発法人産業技術総合研究所 | Flowmeter |
| JP2017049125A (en) * | 2015-09-02 | 2017-03-09 | 国立研究開発法人産業技術総合研究所 | Flowmeter |
| WO2019231251A1 (en) * | 2018-05-30 | 2019-12-05 | 한국기계연구원 | Pipe damage detection apparatus, pipe damage detection system using same and pipe damage detection method using same |
| CN112204367A (en) * | 2018-05-30 | 2021-01-08 | 韩国机械研究院 | Pipe damage detection apparatus, pipe damage detection system using the same, and pipe damage detection method using the same |
| JP2021527803A (en) * | 2018-05-30 | 2021-10-14 | コリア・インスティテュート・オブ・マシナリー・アンド・マテリアルズＫｏｒｅａ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｍａｃｈｉｎｅｒｙ ＆ Ｍａｔｅｒｉａｌｓ | Piping damage detection device, piping damage detection system using this, and piping damage detection method using this |
| US20210131898A1 (en) * | 2019-10-31 | 2021-05-06 | DJ Instruments | Temperature compensation of strain gauge output |
| US11598686B2 (en) * | 2019-10-31 | 2023-03-07 | DJ Instruments | Temperature compensation of strain gauge output |
| KR102248241B1 (en) * | 2019-12-06 | 2021-05-06 | (주)리잰 | Pipe Kit to prevent pressure transmitter port blockage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20040106 |