CN118794596B - Differential pressure sensor reference end pressure control device and method - Google Patents
Differential pressure sensor reference end pressure control device and method Download PDFInfo
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- CN118794596B CN118794596B CN202411273054.5A CN202411273054A CN118794596B CN 118794596 B CN118794596 B CN 118794596B CN 202411273054 A CN202411273054 A CN 202411273054A CN 118794596 B CN118794596 B CN 118794596B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 8
- 238000009530 blood pressure measurement Methods 0.000 abstract description 4
- 230000010349 pulsation Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
本发明属于压力测量技术研究领域，公开了一种差压传感器参考端压力控制装置及方法。控制装置包括从前至后顺序连接的分压器、连接软管Ⅰ、控制器、连接软管Ⅱ和真空抽吸装置，采用模块化设计，对差压传感器或电子扫描阀参考端压力进行了有效控制，提高了差压传感器或电子扫描阀的测量精度，解决了安装在封闭空间内的差压传感器或电子扫描阀由于参考端压力脉动造成的测量精度下降的技术难题。控制方法能够实现对差压传感器参考端压力的精确控制，还能够保证试验测量过程中差压传感器正常使用，同时启动、停车过程中也不会出现过载、损坏等现象，实现了封闭空间内压力高精度测量。装置结构简单、布局合理，方法成本低、效益高，具有工程应用价值。
The present invention belongs to the field of pressure measurement technology research, and discloses a reference end pressure control device and method for a differential pressure sensor. The control device includes a pressure divider, a connecting hose I, a controller, a connecting hose II and a vacuum suction device connected in sequence from front to back. It adopts a modular design to effectively control the reference end pressure of the differential pressure sensor or the electronic scanning valve, improve the measurement accuracy of the differential pressure sensor or the electronic scanning valve, and solve the technical problem of the reduction of measurement accuracy caused by the pressure pulsation at the reference end of the differential pressure sensor or the electronic scanning valve installed in the closed space. The control method can realize the precise control of the reference end pressure of the differential pressure sensor, and can also ensure the normal use of the differential pressure sensor during the test measurement process. At the same time, there will be no overload, damage and other phenomena during the start-up and shutdown process, and high-precision pressure measurement in the closed space is realized. The device has a simple structure and a reasonable layout, and the method has low cost and high efficiency, and has engineering application value.
Description
Technical Field
The invention belongs to the technical field of pressure measurement, and particularly relates to a differential pressure sensor reference end pressure control device and method.
Background
When a differential pressure sensor is adopted in a wind tunnel test section or a closed cabin body to measure pressure, the pressure sensor (or the electronic scanning valve module) is often required to be installed in the closed space because the measuring point is in the closed space. However, the pressure of the test section will change greatly during the process of starting, running and stopping the wind tunnel, even if the pressure in the test section pulsates during the relatively stable running period, the pressure P - at the reference end of the differential pressure sensor will be unstable, if the control is not performed, the difference between the pressure P + at the pressure end of the differential pressure sensor and the pressure P - at the reference end of the differential pressure sensor, that is, the measured pressure P (p=p +-P-) will have an error, which is unfavorable for the accurate measurement of the pressure P.
Currently, there is a need to develop a differential pressure sensor reference pressure control device and method.
Disclosure of Invention
The invention aims to provide a pressure control device for a reference end of a differential pressure sensor, and aims to provide a pressure control method for the reference end of the differential pressure sensor, which is used for overcoming the defects of the prior art.
The invention relates to a differential pressure sensor reference end pressure control device, which comprises a voltage divider, a connecting hose I, a controller, a connecting hose II and a vacuum pumping device which are sequentially connected from front to back;
The voltage divider is arranged in the closed cabin body including the test section; the voltage divider comprises a plurality of sensor reference end connectors which are arranged on the upper surface of the box body in an array manner, and also comprises a quick-connection plug I which is connected to the side surface of the box body, wherein the rear end of the quick-connection plug I is inserted into a connecting hose I;
The controller comprises a quick connector II, a wall-through flange, a main pipeline, a vacuum gauge plug, a main pipeline valve and a quick connector III which are sequentially connected from front to back; the device also comprises a bypass pipeline parallel to the main pipeline, wherein the front end of the bypass pipeline is connected with a through-wall flange, the middle section of the bypass pipeline is provided with a bypass valve, and the rear end of the bypass pipeline is connected with the main pipeline; the front end of the quick-connect plug II is inserted into the connecting hose I, and the rear end of the quick-connect plug III is inserted into the connecting hose II;
The vacuum suction device comprises a quick connector IV and a vacuum cabin which are sequentially connected from front to back, and a vacuum pump is fixed on the vacuum cabin; the front end of the quick-connect plug IV is inserted into a connecting hose II;
the wall-penetrating flange of the controller is fixed on the wall surface of the closed cabin body, and the vacuum suction device is fixed outside the closed cabin body.
Further, the number of the sensor reference terminal connectors is determined according to test requirements.
Further, the quick-connect plug I, the quick-connect plug II, the quick-connect plug III and the quick-connect plug IV are all sealed through threaded connection and sealing gaskets.
Further, the box body, the vacuum cabin, the through-wall flange, the bypass pipeline, the bypass valve, the main pipeline, the vacuum gauge plug, the main pipeline valve, the quick plug I, the quick plug II, the quick plug III and the quick plug IV are all made of stainless steel materials.
Further, the connection mode of the main pipeline valve and the bypass valve comprises welding and flange connection.
Further, the diameter range of the bypass pipeline and the main pipeline is 5 mm-10 mm.
Further, the vacuum cabin connection interface is determined according to the type of the vacuum pump.
Further, the form of the plug interface of the vacuum gauge is determined according to the selection type of the vacuum gauge.
The invention relates to a differential pressure sensor reference end pressure control method, which comprises the following steps:
S10, fixing a wall-through flange of a controller on the wall surface of a closed cabin body, fixing a voltage divider in the closed cabin body, and fixing a vacuum suction device outside the closed cabin body to complete the installation, connection and fixation of all components of a pressure control device at the reference end of a differential pressure sensor;
s20, connecting a reference end of a differential pressure sensor or a scanning valve to a sensor reference end of a voltage divider;
s30, opening a main pipeline valve and a bypass valve on the controller;
s40, vacuumizing the closed cabin, and closing a bypass valve when the pressure is smaller than the range of the differential pressure sensor or the scanning valve and the starting condition of the vacuum pump is reached;
s50, starting a vacuum pump, and exhausting the vacuum cabin;
s60, reading the pressure value of the vacuum chamber through a vacuum gauge on the vacuum gauge plug, and completing test preparation when the pressure value of the vacuum chamber is smaller than the resolution of the differential pressure sensor or the scanning valve and is stable;
S70, wind tunnel test is carried out, measurement is carried out through a differential pressure sensor or a scanning valve, and after the test is finished, a main pipeline valve and a vacuum pump are sequentially closed;
S80, opening a bypass valve, opening a closed cabin, and replacing a model or adjusting the model posture;
S90, opening a main pipeline valve, and repeating S40-S80 until all test measurements are completed.
The differential pressure sensor reference end pressure control device adopts a modularized design, is divided into three parts of pressure supply, pressure control and pressure acquisition, wherein the pressure supply part is a pressure divider serving as a reference end pressure provider, and the pressure divider is arranged in a test section or a closed cabin body and is connected with sensor reference end connectors; the pressure control part is a controller, a wall penetrating flange of the controller is arranged on the wall surface of the test section or the closed cabin body, and the controller is provided with a main pipeline and a bypass pipeline, so that the starting condition of a vacuum pump can be achieved by utilizing a vacuum system of a wind tunnel or a vacuum cabin, the pressure at two ends of a differential pressure sensor or a scanning valve can be kept balanced, and damage is avoided; the pressure acquisition part adopts a suction device to set the pressure of the reference end, and the vacuum suction device is arranged outside the test section or the closed cabin body, so that the control is convenient. The three parts are connected by adopting a hose, the length of the hose can be laid out according to the environment and the field, and the hose is flexible and convenient. In order to quickly reach higher vacuum degree, the volume of the vacuum cabin is not too large, and the diameter range of the main pipeline and the bypass pipeline is 5 mm-10 mm.
The differential pressure sensor reference end pressure control method fully considers the pressure distribution characteristics of the differential pressure sensor in the starting, running and stopping processes of the test section or the closed cabin, and through the operation of the valve and the vacuum pump, the pressure stability of the sensor reference end in the test measurement process can be ensured, the pressure measurement deviation caused by pressure pulsation in the test section or the closed cabin can be avoided, and the destructive pressure difference between the reference end and the pressure end of the differential pressure sensor or the scanning valve can be avoided. In the test and measurement process, all operations are carried out outside the test section or the closed cabin, so that the method is convenient, quick and high in safety. If the site safety is poor, the vacuum pump and the valve can be operated in a remote control mode.
The reference end pressure control device and the reference end pressure control method for the differential pressure sensor can realize accurate control of the reference end pressure of the differential pressure sensor, can ensure that the differential pressure sensor is normally used in the test measurement process, can not generate the phenomena of overload, damage and the like in the starting and stopping processes, and realize high-precision measurement of the pressure in the closed space.
In summary, the differential pressure sensor reference end pressure control device and the differential pressure sensor reference end pressure control method divide the control device into three parts of pressure supply, pressure control and pressure acquisition according to functions, effectively control the differential pressure sensor or the electronic scanning valve reference end pressure, improve the measurement precision of the differential pressure sensor or the electronic scanning valve, and solve the technical problem of the reduction of the measurement precision of the differential pressure sensor or the electronic scanning valve arranged in a closed space due to the pressure pulsation of the reference end; the device has simple structure, reasonable layout, low cost and high benefit, and has engineering application value.
Drawings
FIG. 1 is a schematic diagram (perspective view) of a differential pressure sensor reference end pressure control device according to the present invention;
FIG. 2 is a schematic diagram (front view) of a differential pressure sensor reference end pressure control device according to the present invention;
FIG. 3a is a schematic diagram (perspective view) of a voltage divider in a differential pressure sensor reference end pressure control device according to the present invention;
FIG. 3b is a schematic diagram (front view) of the voltage divider in the differential pressure sensor reference end pressure control device of the present invention;
FIG. 4a is a schematic diagram (perspective view) of a controller in a differential pressure sensor reference end pressure control device according to the present invention;
FIG. 4b is a schematic diagram (front view) of the controller in the differential pressure sensor reference end pressure control device of the present invention;
FIG. 5a is a schematic view (perspective view) of a vacuum pumping apparatus in a differential pressure sensor reference end pressure control device of the present invention;
Fig. 5b is a schematic view (front view) of the structure of the vacuum pumping device in the differential pressure sensor reference end pressure control device of the present invention.
In the figure, 1. A voltage divider; 2. a controller; 3. a vacuum suction device; 4. a connecting hose I; 5. a connecting hose II; 101. a sensor reference terminal connector; 102. a case; 103. a quick-connection plug I; 201. a quick-connect plug II; 202. a wall penetrating flange; 203. a bypass conduit; 204. a bypass valve; 205. a main pipe; 206. a vacuum gauge plug; 207. a main pipeline valve; 208. quick connect plug III; 301. a quick-connect plug IV; 302. a vacuum chamber; 303. and a vacuum pump.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
Examples: as shown in fig. 1 and 2, the reference end pressure control device of the differential pressure sensor of the present embodiment comprises a voltage divider 1, a connecting hose i 4, a controller 2, a connecting hose ii 5 and a vacuum pumping device 3, which are sequentially connected from front to back;
As shown in fig. 3a and 3b, the voltage divider 1 is installed in a closed cabin including a test section; the voltage divider 1 comprises a plurality of sensor reference terminal connectors 101 which are arranged in an array and are arranged on the upper surface of a box body 102, and also comprises a quick-connection plug I103 which is connected to the side surface of the box body 102, wherein the rear end of the quick-connection plug I103 is inserted into a connecting hose I4;
As shown in fig. 4a and 4b, the controller 2 comprises a quick connector ii 201, a through-wall flange 202, a main pipe 205, a vacuum gauge plug 206, a main pipe valve 207 and a quick connector iii 208 which are sequentially connected from front to back; the device further comprises a bypass pipeline 203 which is parallel to the main pipeline 205, wherein the front end of the bypass pipeline 203 is connected with a through-wall flange 202, a bypass valve 204 is arranged in the middle section of the bypass pipeline 203, and the rear end of the bypass pipeline 203 is connected with the main pipeline 205; the front end of the quick-connect plug II 201 is inserted into the connecting hose I4, and the rear end of the quick-connect plug III 208 is inserted into the connecting hose II 5;
As shown in fig. 5a and 5b, the vacuum suction device 3 comprises a quick-connection plug iv 301 and a vacuum cabin 302 which are sequentially connected from front to back, and a vacuum pump 303 is fixed on the vacuum cabin 302; the front end of the quick-connect plug IV 301 is inserted into a connecting hose II 5;
the wall-penetrating flange 202 of the controller 2 is fixed on the wall surface of the closed cabin, and the vacuum suction device 3 is fixed outside the closed cabin.
Further, the number of the sensor reference terminal connectors 101 is determined according to test requirements.
Further, the quick connector I103, the quick connector II 201, the quick connector III 208 and the quick connector IV 301 are all sealed through threaded connection and sealing gaskets.
Further, the box 102, the vacuum chamber 302, the through-wall flange 202, the bypass pipeline 203, the bypass valve 204, the main pipeline 205, the vacuum gauge plug 206, the main pipeline valve 207, the quick connector I103, the quick connector II 201, the quick connector III 208 and the quick connector IV 301 are all made of stainless steel materials.
Further, the connection between the main pipe valve 207 and the bypass valve 204 includes welding and flange connection.
Further, the diameter range of the bypass pipeline 203 and the main pipeline 205 is 5 mm-10 mm.
Further, the connection interface of the vacuum chamber 302 is determined according to the type of the vacuum pump 303.
Further, the interface form of the vacuum gauge plug 206 is determined according to the vacuum gauge type.
The differential pressure sensor reference end pressure control method of the embodiment comprises the following steps:
S10, fixing a wall penetrating flange 202 of a controller 2 on the wall surface of a closed cabin, fixing a voltage divider 1 in the closed cabin, and fixing a vacuum suction device 3 outside the closed cabin to complete the installation, connection and fixation of all components of a pressure control device at the reference end of a differential pressure sensor;
s20, connecting a reference end of a differential pressure sensor or a scanning valve to a sensor reference end connector 101 of the voltage divider 1;
S30, opening a main pipeline valve 207 and a bypass valve 204 on the controller 2;
S40, vacuumizing the closed cabin, and closing the bypass valve 204 when the pressure is smaller than the range of the differential pressure sensor or the scanning valve and the starting condition of the vacuum pump 303 is reached;
S50, starting a vacuum pump 303 to pump air out of the vacuum chamber 302;
S60, reading the pressure value of the vacuum chamber 302 through a vacuum gauge on the vacuum gauge plug 206, and completing test preparation when the pressure value of the vacuum chamber 302 is smaller than the resolution of a differential pressure sensor or a scanning valve and is stable;
S70, wind tunnel test is carried out, measurement is carried out through a differential pressure sensor or a scanning valve, and after the test is finished, the main pipeline valve 207 and the vacuum pump 303 are sequentially closed;
S80, opening a bypass valve 204, opening a closed cabin, and replacing a model or adjusting the model posture;
S90, opening the main pipeline valve 207, and repeating S40-S80 until all test measurements are completed.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and the embodiments, but it can be fully applied to various fields suitable for the present invention. Further modifications and adaptations may readily be made by those skilled in the art without departing from the principles of the present invention, and thus the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (9)
1. The differential pressure sensor reference end pressure control device is characterized by comprising a voltage divider (1), a connecting hose I (4), a controller (2), a connecting hose II (5) and a vacuum pumping device (3) which are sequentially connected from front to back;
The voltage divider (1) is arranged in the closed cabin body including the test section; the voltage divider (1) comprises a plurality of sensor reference end connectors (101) which are arranged on the upper surface of the box body (102) in an array manner, and also comprises a quick-connection plug I (103) connected to the side surface of the box body (102), wherein the rear end of the quick-connection plug I (103) is inserted into a connecting hose I (4);
The controller (2) comprises a quick connector II (201), a through-wall flange (202), a main pipeline (205), a vacuum gauge plug (206), a main pipeline valve (207) and a quick connector III (208) which are sequentially connected from front to back; the device further comprises a bypass pipeline (203) parallel to the main pipeline (205), wherein the front end of the bypass pipeline (203) is connected with a through-wall flange (202), a bypass valve (204) is arranged in the middle section of the bypass pipeline (203), and the rear end of the bypass pipeline (203) is connected with the main pipeline (205); the front end of the quick-connect plug II (201) is inserted into the connecting hose I (4), and the rear end of the quick-connect plug III (208) is inserted into the connecting hose II (5);
the vacuum suction device (3) comprises a quick connector IV (301) and a vacuum cabin (302) which are sequentially connected from front to back, and a vacuum pump (303) is fixed on the vacuum cabin (302); the front end of the quick-connect plug IV (301) is inserted into a connecting hose II (5);
the wall-penetrating flange (202) of the controller (2) is fixed on the wall surface of the closed cabin body, and the vacuum suction device (3) is fixed outside the closed cabin body.
2. The differential pressure sensor reference end pressure control device according to claim 1, wherein the number of sensor reference end connectors (101) is determined according to test requirements.
3. The pressure control device of the reference end of the differential pressure sensor according to claim 1, wherein the quick connector I (103), the quick connector II (201), the quick connector III (208) and the quick connector IV (301) are all sealed by threaded connection and sealing gaskets.
4. The differential pressure sensor reference pressure control device of claim 1, wherein the tank (102), the vacuum chamber (302), the through-wall flange (202), the bypass pipe (203), the bypass valve (204), the main pipe (205), the vacuum gauge plug (206), the main pipe valve (207), the quick connector I (103), the quick connector II (201), the quick connector III (208) and the quick connector IV (301) are all made of stainless steel materials.
5. The differential pressure sensor reference pressure control device of claim 1, wherein the main pipe valve (207) and the bypass valve (204) are connected by welding and flange connection.
6. The differential pressure sensor reference end pressure control device according to claim 1, wherein the diameter of the bypass pipeline (203) and the diameter of the main pipeline (205) are in the range of 5 mm-10 mm.
7. The differential pressure sensor reference pressure control device of claim 1, wherein the vacuum chamber (302) connection interface is determined according to a type of vacuum pump (303).
8. The differential pressure sensor reference end pressure control device of claim 1, wherein the interface form of the vacuum gauge plug (206) is determined according to the vacuum gauge type.
9. A differential pressure sensor reference end pressure control method for a differential pressure sensor reference end pressure control device according to any one of claims 1 to 8, characterized by comprising the steps of:
S10, fixing a wall penetrating flange (202) of a controller (2) on the wall surface of a closed cabin body, fixing a voltage divider (1) in the closed cabin body, and fixing a vacuum suction device (3) outside the closed cabin body to complete the installation, connection and fixation of all components of a pressure control device at the reference end of a differential pressure sensor;
s20, connecting a reference end of a differential pressure sensor or a scanning valve to a sensor reference end joint (101) of a voltage divider (1);
s30, opening a main pipeline valve (207) and a bypass valve (204) on the controller (2);
S40, vacuumizing the closed cabin, and closing a bypass valve (204) when the pressure is smaller than the range of the differential pressure sensor or the scanning valve and reaches the starting condition of the vacuum pump (303);
s50, starting a vacuum pump (303) to pump air out of the vacuum cabin (302);
S60, reading a pressure value of the vacuum chamber (302) through a vacuum gauge on the vacuum gauge plug (206), and completing test preparation when the pressure value of the vacuum chamber (302) is smaller than the resolution of a differential pressure sensor or a scanning valve and is stable;
S70, wind tunnel test is carried out, measurement is carried out through a differential pressure sensor or a scanning valve, and after the test is finished, a main pipeline valve (207) and a vacuum pump (303) are sequentially closed;
s80, opening a bypass valve (204), opening a closed cabin, and replacing a model or adjusting the model posture;
s90, opening a main pipeline valve (207), and repeating S40-S80 until all test measurements are completed.
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| CN118150107A (en) * | 2024-05-09 | 2024-06-07 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-temperature wind tunnel and wide-parameter operation method thereof |
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