CN112304489B - High-low temperature dynamic pressure generation method and device - Google Patents
High-low temperature dynamic pressure generation method and device Download PDFInfo
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- CN112304489B CN112304489B CN202011152618.1A CN202011152618A CN112304489B CN 112304489 B CN112304489 B CN 112304489B CN 202011152618 A CN202011152618 A CN 202011152618A CN 112304489 B CN112304489 B CN 112304489B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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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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Abstract
The invention discloses a dynamic pressure generation method and device in a high-temperature and low-temperature environment, and belongs to the technical field of dynamic pressure generation. The invention comprises a pressure chamber base body, a temperature control hole, a compensation hole, a normal temperature pressure cavity, a compensation isolation diaphragm, a dynamic pressure chamber, a heat insulation layer, a high and low temperature pressure cavity and a high and low temperature isolation diaphragm. The invention adopts a diaphragm isolation mode to isolate the high-temperature cavity from the normal-temperature cavity, so that the standard pressure sensor is always in a laboratory condition, the accuracy of a standard value is ensured, and the problem that no high-temperature and low-temperature standard dynamic pressure sensor exists at present is solved. According to the medium when the sensor is used, the same pressure medium is filled into the high-low temperature pressure cavity and the normal temperature pressure cavity, the condition during calibration is ensured to be more consistent with the actual use condition, the high-low temperature pressure cavity and the normal temperature pressure cavity can be pre-pressed, the calibration of the dynamic performance of the pressure sensor under different static pressure conditions is realized, and the accuracy of the measurement result of the pressure sensor under the high-low temperature environment is ensured.
Description
Technical Field
The invention relates to a high-low temperature dynamic pressure generation method and a device, belonging to the technical field of dynamic pressure generation.
Background
The dynamic pressure testing technology is widely applied to the field of national defense and military industry such as aviation, aerospace, weapons and the like, pressure sensors installed on an aircraft engine compressor, a turbine and other parts are usually in a high-temperature environment when working normally, sensors installed on an aerial aircraft are usually in a low-temperature environment, according to the basic theory of the pressure sensors, performance parameters of the sensors are greatly influenced by temperature, and when the device runs, the pressure to be measured is generally dynamic pressure. In order to ensure the accuracy of the measurement result of the pressure sensor in the high and low temperature environments, the dynamic performance of the pressure sensor needs to be calibrated in the high and low temperature environments, and the dynamic calibration of the pressure sensor in the high and low temperature environments cannot be realized because a tracing method for reliable dynamic pressure in the high and low temperature environments does not exist at present and a standard dynamic pressure sensor in the high and low temperature environments does not exist at present.
Disclosure of Invention
The invention aims to provide a method and a device for generating dynamic pressure in high and low temperature environments, which can not only separate the high and low temperature environments from a normal temperature environment, but also realize the generation of dynamic pressure under different static pressure conditions, and can improve the accuracy of measurement results of a pressure sensor in the high and low temperature environments.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a dynamic pressure generation method under high and low temperature environment, wherein two sides of a dynamic pressure chamber are symmetrically distributed with two pressure cavities, the two pressure cavities are respectively separated from the dynamic pressure chamber through two pressure diaphragms which are completely the same in material, shape and the like to form a high and low temperature pressure cavity and a normal temperature pressure cavity, the high and low temperature pressure cavity is connected with the outside through a temperature control hole, and high and low temperature pressure medium is transmitted to the high and low temperature pressure cavity through the temperature control hole; in order to ensure that the shapes and the volumes of the high-low temperature pressure cavity and the normal temperature pressure cavity are completely consistent, compensation holes are added at the positions symmetrical to the temperature control holes, the shapes and the sizes of the compensation holes are completely consistent with those of the temperature control holes, the compensation holes are used for ensuring the consistency of the pressure cavities on one hand, and are used for ensuring that pressure media and pressures in the high-low temperature pressure cavity and the normal temperature pressure cavity are completely consistent on the other hand, so that the calibrated pressure sensor and the standard pressure sensor are completely consistent under other external conditions except temperature conditions. The high-low temperature pressure cavity and the normal-temperature pressure cavity adjust the initial pressure to be positive pressure or negative pressure through the temperature control hole and the compensation hole. The initial pressure of the high-temperature pressure chamber and the initial pressure of the low-temperature pressure chamber are the same as the initial pressure of the normal-temperature pressure chamber. The same sine pressure is generated in the high-low temperature pressure cavity and the normal temperature pressure cavity, the standard sine pressure value is calculated through the output value of the standard pressure sensor, and the calibration of the pressure sensor to be calibrated is completed through the comparison calculation of the output value of the pressure sensor to be calibrated and the standard sine pressure value.
The invention discloses a dynamic pressure generating device in a high-temperature and low-temperature environment, which comprises a pressure chamber base body, a temperature control hole, a compensation hole, a normal-temperature pressure cavity, a compensation isolation diaphragm, a dynamic pressure chamber, a heat insulation layer, a high-temperature and low-temperature pressure cavity and a high-temperature and low-temperature isolation diaphragm. The pressure chamber base member does high low temperature dynamic pressure generating device's basis pressure chamber base member central point puts to be the dynamic pressure chamber, two pressure cavity of dynamic pressure chamber bilateral symmetry distribution, pressure cavity passes through respectively high low temperature isolation diaphragm with the compensation isolation diaphragm is cut apart into high low temperature pressure chamber with the normal atmospheric temperature pressure chamber, high low temperature pressure chamber end face installation is by proofreading pressure sensor, normal atmospheric temperature pressure chamber end face installation standard pressure sensor. The dynamic pressure chamber is internally configured to generate a sinusoidal pressure. The pressure pulsation of the dynamic pressure cavity acts on the high-low temperature isolation diaphragm and the compensation isolation diaphragm. The high-low temperature isolation diaphragm and the compensation isolation diaphragm are symmetrical to the dynamic pressure cavity, and the low-temperature isolation diaphragm and the compensation isolation diaphragm are guaranteed to receive the same sine pressure amplitude and phase. The sizes, structures and materials of the high-temperature isolation diaphragm and the low-temperature isolation diaphragm and the compensation isolation diaphragm are completely the same as the connection mode of the pressure chamber substrate. The high-low temperature pressure cavity and the normal temperature pressure cavity are completely the same in shape and size. The high-low temperature pressure cavity is communicated with the outside through the temperature control hole, and the normal temperature pressure cavity is communicated with the outside through the compensation hole. The high-low temperature pressure cavity and the temperature control hole are wrapped with the heat insulation layer. The temperature control hole is used for transmitting high and low temperature pressure media to the high and low temperature pressure cavity, and the compensation hole is used for transmitting normal temperature pressure media which are the same as the high and low temperature pressure media to the normal temperature pressure cavity. The high-low temperature pressure cavity and the normal-temperature pressure cavity can adjust the initial pressure to be positive pressure or negative pressure through the temperature control hole and the compensation hole. The initial pressure of the high-temperature pressure chamber and the initial pressure of the low-temperature pressure chamber are the same as the initial pressure of the normal-temperature pressure chamber.
Preferably, the temperature control hole and the compensation hole are the same in size and are symmetrical to the dynamic pressure chamber.
Preferably, the sinusoidal pressure generating method includes a modulation method, a piston method, a resonance method.
Preferably, the high-low temperature pressure medium and the normal temperature pressure medium are any gas or liquid medium.
The invention discloses an assembly and working method of a dynamic pressure generating device in a high-temperature and low-temperature environment, which comprises the following steps: the pressure sensor to be calibrated and the standard pressure sensor are symmetrically arranged at two sides of the pressure chamber substrate, according to the experimental condition and the use condition of the pressure sensor to be calibrated, high-temperature pressure medium is input into the high-low temperature pressure chamber through the temperature control hole, the same normal temperature pressure medium is input into the normal temperature pressure chamber through the compensation hole, the initial pressure of the high-low temperature pressure chamber and the normal temperature pressure chamber is ensured to be the same, the auxiliary equipment is operated, dynamic pressure is generated in the dynamic pressure cavity, the dynamic pressure drives the high-temperature and low-temperature isolation diaphragms and the normal-temperature isolation diaphragm to make the two diaphragms generate deformation with the same amplitude and the same phase, so as to generate the same sine pressure in the high-low temperature pressure cavity and the normal temperature pressure cavity, calculate the standard sine pressure value through the output value of the standard pressure sensor, and the calibration of the pressure sensor to be calibrated is completed by comparing the output value of the pressure sensor to be calibrated with the standard sine pressure value.
Has the advantages that:
according to the method and the device for generating the dynamic pressure in the high-temperature and low-temperature environment, disclosed by the invention, the high-temperature cavity and the normal-temperature cavity are isolated by adopting a diaphragm isolation mode, so that the standard pressure sensor is always under a laboratory condition, the accuracy of a standard value is ensured, and the problem that no high-temperature and low-temperature standard dynamic pressure sensor exists at present is solved. According to the medium when the sensor is used, the same pressure medium is filled into the high-low temperature pressure cavity and the normal temperature pressure cavity, the condition during calibration is ensured to be more consistent with the actual use condition, the high-low temperature pressure cavity and the normal temperature pressure cavity can be pre-pressed, the calibration of the dynamic performance of the pressure sensor under different static pressure conditions is realized, and the accuracy of the measurement result of the pressure sensor under the high-low temperature environment is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
wherein: 1-calibrated pressure sensor, 2-pressure chamber base body, 3-temperature control hole, 4-compensation hole, 5-standard pressure sensor, 6-normal temperature pressure cavity, 7-compensation isolation diaphragm, 8-dynamic pressure cavity, 9-rotary table, 10-high and low temperature isolation diaphragm, 11-high and low temperature pressure cavity and 12-heat insulation layer.
Detailed Description
For a better understanding of the objects and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1:
as shown in fig. 1, the dynamic pressure generating device in high and low temperature environments disclosed in this embodiment includes a pressure chamber base body 2, a temperature control hole 3, a compensation hole 4, a normal temperature pressure chamber 6, a compensation isolation diaphragm 7, a dynamic pressure chamber 8, an insulating layer 12, a high and low temperature pressure chamber 11, and a high and low temperature isolation diaphragm 10. Pressure chamber base member 2 does high low temperature dynamic pressure generating device's basis 2 central point of pressure chamber base member puts to be dynamic pressure chamber 8, two pressure cavity of 8 bilateral symmetry distributions of dynamic pressure chamber, pressure cavity passes through respectively high low temperature isolation diaphragm 10 with compensation isolation diaphragm 7 is cut apart into high low temperature pressure chamber 11 with normal atmospheric temperature pressure chamber 6, 11 end face mounting of high low temperature pressure chamber are proofreaded pressure sensor 1, 6 end face mounting standard pressure sensor 5 of normal atmospheric temperature pressure chamber. The dynamic pressure chamber 8 may be internally pressurized sinusoidally by modulation, piston, resonance, etc. The pressure pulsation of the dynamic pressure cavity 8 acts on the high and low temperature isolation diaphragm 10 and the compensation isolation diaphragm 7. The high-low temperature isolation diaphragm 10 and the compensation isolation diaphragm 7 are symmetrical to the dynamic pressure cavity 8, and it is guaranteed that the low-temperature isolation diaphragm 10 and the compensation isolation diaphragm 7 receive the same sine pressure amplitude and phase. The size, the structure, the material, the connection mode with the pressure chamber base body 2 and the like of the high-low temperature isolation diaphragm 10 and the compensation isolation diaphragm 7 are completely the same. The high-low temperature pressure cavity 11 and the normal temperature pressure cavity 6 are completely the same in shape and size. The high-low temperature pressure cavity 11 is communicated with the outside through the temperature control hole 3, and the normal temperature pressure cavity 6 is communicated with the outside through the compensation hole 4. The temperature control hole 3 and the compensation hole 4 are the same in size and are symmetrical to the dynamic pressure cavity 8. The high-low temperature pressure cavity 11 and the temperature control hole 3 are wrapped with the heat insulation layer. The temperature control hole 3 is used for transmitting high and low temperature pressure media to the high and low temperature pressure cavity 11, and the compensation hole 4 is used for transmitting normal temperature pressure media which are the same as the high and low temperature pressure media to the normal temperature pressure cavity 6. The high-low temperature pressure medium and the normal temperature pressure medium can be any gas or liquid medium. The high-low temperature pressure cavity 11 and the normal temperature pressure cavity 6 can adjust the initial pressure to be positive pressure or negative pressure through the temperature control hole and the compensation hole. The high-low temperature pressure chamber 11 and the normal temperature pressure chamber 6 have the same initial pressure.
The assembling and implementing method of the dynamic pressure generating device under the high and low temperature environment disclosed by the embodiment comprises the following steps: a pressure sensor 1 to be calibrated and a standard pressure sensor 5 are symmetrically arranged on two sides of a pressure chamber base body 2, according to experimental conditions and using conditions of the pressure sensor 1 to be calibrated, high-temperature pressure medium is input into a high-low temperature pressure chamber 11 through a temperature control hole 3, the same normal-temperature pressure medium input value is input into a normal-temperature pressure chamber 6 through a compensation hole 4, the initial pressure of the high-low temperature pressure chamber 11 is ensured to be the same as that of the normal-temperature pressure chamber 6, auxiliary equipment is operated, dynamic pressure is generated in a dynamic pressure chamber 8, for example, a modulation type sine generation method is taken as an example, a rotary table 9 rotates, circumferential round holes of the rotary table 9 are modulated with modulation square holes of the pressure chamber base body 2 to generate dynamic pressure, the dynamic pressure drives a high-low temperature isolation diaphragm 10 and a normal-temperature isolation diaphragm 7, so that the two diaphragms generate deformation with the same amplitude and the same phase, and further generate the same sine pressure in the high-low temperature pressure chamber 11 and the normal-temperature pressure chamber 6, and calculating a standard sine pressure value through the output value of the standard pressure sensor 5, and finishing the calibration of the pressure sensor to be calibrated through the comparison calculation of the output value of the pressure sensor 1 to be calibrated and the standard sine pressure value.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A dynamic pressure generation method under high and low temperature environment is characterized in that: two pressure cavities are symmetrically distributed on two sides of the dynamic pressure chamber, the two pressure cavities are separated from the dynamic pressure chamber through two pressure diaphragms made of the same materials and in the same shape to form a high-low temperature pressure chamber (11) body and a normal temperature pressure chamber (6), the high-low temperature pressure chamber (11) body is connected with the outside through a temperature control hole (3), and high-low temperature pressure media are transmitted to the high-low temperature pressure chamber (11) body through the temperature control hole (3); in order to ensure that the shapes and the volumes of the high-temperature and low-temperature pressure cavity (11) and the normal-temperature pressure cavity (6) are completely consistent, a compensation hole (4) is added at a position symmetrical to the temperature control hole (3), the shape and the size of the compensation hole (4) are completely consistent with those of the temperature control hole (3), the compensation hole (4) is used for ensuring the consistency of the pressure cavities on one hand, and is used for ensuring that the pressure media and the pressure sizes in the high-temperature and low-temperature pressure cavity (11) and the normal-temperature pressure cavity (6) are completely consistent on the other hand, so that the calibrated pressure sensor and the standard pressure sensor (5) are completely consistent except for the temperature condition; the high-low temperature pressure cavity (11) and the normal temperature pressure cavity (6) adjust the initial pressure to be positive pressure or negative pressure through the temperature control hole (3) and the compensation hole (4); the initial pressure of the high-temperature pressure chamber (11) and the initial pressure of the normal-temperature pressure chamber (6) are the same; the same sine pressure is generated in the high-low temperature pressure cavity (11) and the normal temperature pressure cavity (6), a standard sine pressure value is calculated through an output value of the standard pressure sensor (5), and the calibration of the pressure sensor (1) to be calibrated is completed through the comparison calculation of the output value of the pressure sensor (1) to be calibrated and the standard sine pressure value.
2. A dynamic pressure generating apparatus in high and low temperature environments for implementing a dynamic pressure generating method in high and low temperature environments as claimed in claim 1, characterized in that: the device comprises a pressure chamber base body (2), a temperature control hole (3), a compensation hole (4), a normal temperature pressure cavity (6), a compensation isolation diaphragm (7), a dynamic pressure chamber, a heat insulation layer (12), a high and low temperature pressure cavity (11) and a high and low temperature isolation diaphragm (10); the pressure chamber base body (2) is a basis of the dynamic pressure generating device under the high and low temperature environment, a dynamic pressure chamber (8) is arranged at the central position of the pressure chamber base body (2), two pressure cavities are symmetrically distributed on two sides of the dynamic pressure chamber (8), the pressure cavities are respectively divided into the high and low temperature pressure chamber (11) and the normal temperature pressure chamber (6) through the high and low temperature isolating diaphragm (10) and the compensation isolating diaphragm (7), a calibrated pressure sensor (1) is installed on the end face of the high and low temperature pressure chamber (11), and a standard pressure sensor (5) is installed on the end face of the normal temperature pressure chamber (6); the dynamic pressure chamber (8) is used for generating sine pressure; the pressure pulsation of the dynamic pressure cavity (8) acts on the high-low temperature isolation diaphragm (10) and the compensation isolation diaphragm (7); the high-low temperature isolation diaphragm (10) and the compensation isolation diaphragm (7) are symmetrical to the dynamic pressure cavity (8), so that the high-low temperature isolation diaphragm (10) and the compensation isolation diaphragm (7) can receive the same sine pressure amplitude and phase; the sizes, structures and materials of the high-low temperature isolation diaphragm (10) and the compensation isolation diaphragm (7) are completely the same with the connection mode of the pressure chamber base body (2); the high-low temperature pressure cavity (11) and the normal-temperature pressure cavity (6) are completely the same in shape and size; the high-low temperature pressure cavity (11) is communicated with the outside through the temperature control hole (3), and the normal-temperature pressure cavity (6) is communicated with the outside through the compensation hole (4); the high-low temperature pressure cavity (11) and the temperature control hole (3) are surrounded by the heat insulation layer (12); the temperature control hole (3) is used for transmitting high-low temperature pressure medium to the high-low temperature pressure cavity (11), and the compensation hole (4) is used for transmitting normal temperature pressure medium which is the same as the high-low temperature pressure medium to the normal temperature pressure cavity (6); the high-low temperature pressure cavity (11) and the normal temperature pressure cavity (6) adjust the initial pressure to be positive pressure or negative pressure through the temperature control hole (3) and the compensation hole (4); the initial pressure of the high-temperature pressure chamber (11) and the initial pressure of the normal-temperature pressure chamber (6) are the same.
3. The dynamic pressure generating device under high and low temperature environment as claimed in claim 2, wherein: the temperature control hole (3) and the compensation hole (4) are the same in size and are symmetrical to the dynamic pressure chamber.
4. The dynamic pressure generating device under high and low temperature environment as claimed in claim 2, wherein: the sinusoidal pressure generation method comprises a modulation method, a piston method and a resonance method.
5. The dynamic pressure generating device under high and low temperature environment as claimed in claim 2, wherein: the high-low temperature pressure medium and the normal temperature pressure medium are gas or liquid media.
6. The dynamic pressure generating device under high and low temperature environment as claimed in claim 2, 3, 4 or 5, wherein: the assembling and working method comprises the following steps: a pressure sensor (1) to be calibrated and a standard pressure sensor (5) are symmetrically arranged at two sides of a pressure chamber base body (2), according to experimental conditions and using conditions of the pressure sensor (1) to be calibrated, high-temperature pressure medium is input into a high-low temperature pressure chamber (11) through a temperature control hole (3), the same normal-temperature pressure medium is input into a normal-temperature pressure chamber (6) through a compensation hole (4), the initial pressures of the high-low temperature pressure chamber (11) and the normal-temperature pressure chamber (6) are ensured to be the same, auxiliary equipment is operated, dynamic pressure is generated in a dynamic pressure chamber (8), the dynamic pressure drives a high-low temperature isolation diaphragm (10) and the normal-temperature isolation diaphragm, the two diaphragms generate deformation with the same amplitude and the same phase, the same sinusoidal pressure is generated in the high-low temperature pressure chamber (11) and the normal-temperature pressure chamber (6), and the standard sinusoidal pressure value is calculated through the output value of the standard pressure sensor (5), and the calibration of the pressure sensor (1) to be calibrated is completed by comparing the output value of the pressure sensor (1) to be calibrated with the standard sine pressure value.
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| CN202011152618.1A CN112304489B (en) | 2020-10-26 | 2020-10-26 | High-low temperature dynamic pressure generation method and device |
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| CN115326285B (en) * | 2022-10-13 | 2023-03-24 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Low-temperature pulsating pressure calibration device |
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| CN105651458B (en) * | 2016-04-07 | 2019-03-19 | 中国科学院光电研究院 | The calibrating installation and method of differential pressure pickup in high/low temperature hypobaric |
| CN107702849B (en) * | 2017-10-31 | 2024-02-09 | 北京航天计量测试技术研究所 | Force sensor calibration device under high-low temperature condition |
| CN110496653B (en) * | 2018-05-17 | 2021-08-17 | 北京航天计量测试技术研究所 | Split type split high-low temperature generating device |
| CN109341945B (en) * | 2018-11-23 | 2020-08-21 | 中国航空工业集团公司北京长城计量测试技术研究所 | Pulse pressure measurement correction method based on double tube cavities |
| CN110006587A (en) * | 2019-03-11 | 2019-07-12 | 中国航空工业集团公司北京长城航空测控技术研究所 | A kind of caliberating device for high-temperature high pressure sensor |
| CN110849541B (en) * | 2019-11-28 | 2021-07-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | High and low temperature pulsating pressure tracing method and device |
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