CN106969875B - Dynamic total pressure probe with real-time calibration function - Google Patents
Dynamic total pressure probe with real-time calibration function Download PDFInfo
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- CN106969875B CN106969875B CN201710200527.2A CN201710200527A CN106969875B CN 106969875 B CN106969875 B CN 106969875B CN 201710200527 A CN201710200527 A CN 201710200527A CN 106969875 B CN106969875 B CN 106969875B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to the technical field of pressure testing, and discloses a dynamic total pressure probe with real-time calibration. The probe comprises a probe head and a supporting rod (1), wherein a steady-state pressure hole (2) and a dynamic pressure hole (3) are formed in the cylindrical surface of the probe head, the steady-state pressure hole (2) is connected with a probe external pressure sensor through a pressure leading pipe (4), the dynamic pressure sensor is arranged at the position close to the dynamic pressure hole (3) in the probe head, and the two holes are located at the same circumferential position of the cylindrical surface. Compared with the existing pressure probe, the dynamic pressure probe can measure the steady state total pressure and the dynamic total pressure parameters of the incoming flow at the same time through calibration, and can be used for the dynamic pressure sensor to carry out real-time calibration because the steady state pressure sensor is far away from the flow field and is less influenced by the temperature.
Description
Technical Field
The invention belongs to the technical field of pressure testing, and relates to a dynamic total pressure probe with real-time calibration.
Background
Pressure testing is an important component of flow field measurements in scientific research and practical engineering applications. The actual test site is often in a severe environment, so that the LDV, PIV and other advanced optical test technologies and hot wire anemometers are difficult to measure. The advanced high-frequency pressure probe technology and the built-in dynamic pressure sensor have the characteristics of being firmer and more durable than a hot wire, simpler than optical measurement, easier to apply to engineering tests, scientific research and the like, and are widely applied. In order to ensure the frequency response of the pressure sensor in the dynamic pressure measurement process, the sensor is generally close to a measured flow field, and the temperature change of the flow field can cause the temperature drift of the pressure sensor to influence the measurement precision.
Therefore, there is a lack of pressure probe technology that can calibrate dynamic pressure sensors in real time in current scientific research and practical engineering applications.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the lack of a pressure probe technology capable of calibrating the dynamic pressure sensor in real time in the current scientific research and practical engineering application, the combined probe is adopted to calibrate the dynamic pressure sensor in real time, so that the accuracy of the measurement result is improved.
The technical solution of the invention is as follows:
the probe comprises a probe head and a support rod (1), wherein the probe head comprises a steady-state pressure hole (2) and a dynamic pressure hole (3), and a steady-state pressure sensor pressure leading pipe (4) and a dynamic pressure sensor lead (5) are led out from the interior of the support rod (1).
Furthermore, the probe supporting rod (1) is of a cylindrical hollow structure, the outer diameter of the supporting rod (1) is 4-10 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter.
Furthermore, the size of the steady-state pressure hole (2) is consistent with that of the dynamic pressure hole (3), the aperture is 0.1-5 mm, the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe, the distance between the circle centers of the two holes is larger than 1.2 times of the aperture, and the steady-state pressure hole (2) can be located above or below the dynamic pressure hole (3).
Furthermore, the steady-state pressure sensor is connected with the steady-state pressure hole (2) through a pressure leading pipe, and the dynamic pressure sensor is arranged in the probe head part and close to the dynamic pressure hole (3).
The invention has the beneficial effects that: the influence on the measured flow field is small, the installation reliability is guaranteed, the dynamic pressure measurement result is calibrated in real time by using the measurement result of the steady-state pressure, and the accuracy of the measurement result is improved.
Drawings
FIG. 1 is a schematic diagram of a combination probe for simultaneously measuring steady-state total pressure and dynamic total pressure of a fluid: 1-probe supporting rod, 2-steady state pressure hole, 3-dynamic pressure hole, 4-pressure guiding pipe and 5-dynamic pressure sensor lead.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in figure 1, the invention comprises a probe head and a support rod (1), wherein the probe head comprises a steady-state pressure hole (2) and a dynamic pressure hole (3), and a steady-state pressure sensor pressure leading pipe (4) and a dynamic pressure sensor lead wire (5) are led out from the interior of the support rod (1).
The probe supporting rod (1) is of a cylindrical hollow structure, the outer diameter of the supporting rod (1) is 4 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter.
The size of the steady-state pressure hole (2) is consistent with that of the dynamic pressure hole (3), the aperture is 0.4 mm, and the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe.
The steady-state pressure sensor is connected with the steady-state pressure hole (2) through a pressure leading pipe, and the dynamic pressure sensor is arranged in the probe head part and close to the dynamic pressure hole (3).
The dynamic total pressure probe with the real-time calibration introduced in the embodiment of the invention can obtain calibration data through calibration and calibration. During actual flow field measurement, a voltage signal of the pressure sensor can be obtained through a lead of the pressure sensor, data processing is carried out by using obtained calibration data, dynamic total pressure and steady state total pressure information of the flow field can be obtained, and real-time calibration can be carried out on the dynamic pressure by using a measurement result of the steady state pressure through further processing, so that the accuracy of the measurement result is improved.
Claims (1)
1. The utility model provides a dynamic total pressure probe from area real-time calibration which characterized in that: the probe comprises a probe head and a support rod (1), wherein the probe head comprises a steady-state pressure hole (2) and a dynamic pressure hole (3), and a steady-state pressure sensor pressure leading pipe (4) and a dynamic pressure sensor lead (5) are led out from the interior of the support rod (1);
the probe supporting rod (1) is of a cylindrical hollow structure, the outer diameter of the supporting rod (1) is 4 mm, and the inner diameter of the supporting rod (1) is 1 mm smaller than the outer diameter;
the steady-state pressure hole (2) and the dynamic pressure hole (3) are consistent in size, the aperture is 0.4 mm, the two holes are located at the same circumferential position of the cylindrical surface of the head of the probe, the distance between the circle centers of the two holes is larger than 1.2 times of the aperture, and the steady-state pressure hole (2) can be located above or below the dynamic pressure hole (3);
the steady-state pressure sensor is connected with the steady-state pressure hole (2) through a pressure leading pipe, and the dynamic pressure sensor is arranged in the probe head part and close to the dynamic pressure hole (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710200527.2A CN106969875B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with real-time calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710200527.2A CN106969875B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with real-time calibration function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106969875A CN106969875A (en) | 2017-07-21 |
| CN106969875B true CN106969875B (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710200527.2A Active CN106969875B (en) | 2017-03-29 | 2017-03-29 | Dynamic total pressure probe with real-time calibration function |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110060141A (en) * | 2009-11-30 | 2011-06-08 | 한국전력공사 | Device of measuring the temperature and pressure probe |
| CN102141447A (en) * | 2010-12-31 | 2011-08-03 | 中国航天科技集团公司第六研究院第十一研究所 | Total temperature/total pressure and static probe |
| CN104101457A (en) * | 2013-04-02 | 2014-10-15 | 中国科学院工程热物理研究所 | Dynamic total pressure probe |
| CN105716788A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Three-hole transonic speed pressure probe |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9128005B2 (en) * | 2012-10-01 | 2015-09-08 | General Electric Company | Metalized ceramic leading edge nozzle Kiels for high-temperature turbine applications |
| CN104048808B (en) * | 2013-03-14 | 2016-04-20 | 中国科学院工程热物理研究所 | A kind of kolmogorov sinai entropy probe |
| CN106404409B (en) * | 2016-11-16 | 2018-12-07 | 中国科学院工程热物理研究所 | A kind of probe assembly of suitable aero-engine Strong shear nonstationary flow test |
-
2017
- 2017-03-29 CN CN201710200527.2A patent/CN106969875B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110060141A (en) * | 2009-11-30 | 2011-06-08 | 한국전력공사 | Device of measuring the temperature and pressure probe |
| CN102141447A (en) * | 2010-12-31 | 2011-08-03 | 中国航天科技集团公司第六研究院第十一研究所 | Total temperature/total pressure and static probe |
| CN104101457A (en) * | 2013-04-02 | 2014-10-15 | 中国科学院工程热物理研究所 | Dynamic total pressure probe |
| CN105716788A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Three-hole transonic speed pressure probe |
Non-Patent Citations (1)
| Title |
|---|
| 基于半无限引压管效应的动态压力测量方法;杨林 等;《航空动力学报》;20141030;第29卷(第10期);全文 * |
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| CN106969875A (en) | 2017-07-21 |
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