CN110361133B - Complementary correction method for multiple air pressure sensors - Google Patents
Complementary correction method for multiple air pressure sensors Download PDFInfo
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- CN110361133B CN110361133B CN201910656861.8A CN201910656861A CN110361133B CN 110361133 B CN110361133 B CN 110361133B CN 201910656861 A CN201910656861 A CN 201910656861A CN 110361133 B CN110361133 B CN 110361133B
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- 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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Abstract
The invention discloses a complementary correction method of multiple air pressure sensors, which comprises the steps of mounting 2 air pressure sensors on a device with a complementary air pressure area to obtain complementary air pressure sensors, and then calculating the average value of air pressure values obtained by the 2 air pressure sensors to obtain an air pressure correction value; when the read values of the two sensors are added to be mean, the method can better obtain the value close to the static atmospheric pressure, so that a more accurate atmospheric pressure value can be obtained by complementation, the problem that the read value of a single atmospheric pressure sensor cannot accurately reflect the atmospheric pressure value due to local airflow disturbance is effectively solved, and the method is particularly suitable for the air pressure height setting of unmanned planes such as quad-rotor unmanned planes, and can well solve the problem because the local airflow around the quad-rotor unmanned planes is greatly influenced by the propeller.
Description
Technical Field
The invention relates to a complementary correction method of a multi-air pressure sensor.
Background
At present, a height-fixing sensor of an unmanned aerial vehicle generally has ultrasonic waves, a GPS (global positioning system), a barometer and the like, the advantages and the disadvantages of each sensor can be fused during use to make up for the deficiencies, accurate and real-time height information is obtained, but the barometer is greatly influenced by local air flow due to the fact that the atmospheric air pressure value is measured, the converted relative height value is greatly fluctuated if strong local air flow is met during use, the height data fusion accuracy and the stability control on the height of the unmanned aerial vehicle are influenced, and therefore the research and development of a correction method for effectively reducing the influence of the air flow on the air pressure value for the barometer has important significance.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art: a complementary correction method for a multi-pressure sensor is provided that effectively reduces the effects of localized air flow on the static air pressure measurement.
The technical solution of the invention is as follows: a complementary correction method of multiple air pressure sensors is characterized in that 2 air pressure sensors are installed on a device with a complementary air pressure area to obtain complementary air pressure sensors, and then the average value of air pressure values obtained by the 2 air pressure sensors is obtained to obtain an air pressure correction value.
The device with complementary pneumatic zones has two regions that are complementary: when the device is placed in a flowing gas stream, the pressure values in the two zones vary in magnitude in opposition, one increasing and one decreasing.
The complementary air pressure sensor comprises a base and a cylindrical pipe transversely fixed on the base, and a shuttle-shaped air chamber coaxial with the cylindrical pipe is arranged in the cylindrical pipe; a first air chamber and a second air chamber are symmetrically arranged in the shuttle-shaped air chamber along the cross section of the middle part of the shuttle-shaped air chamber; and a first air pressure sensor and a second air pressure sensor are respectively arranged in the first air chamber and the second air chamber.
And pins of the first air pressure sensor and the second air pressure sensor are led out through leads and are electrically connected with an interface arranged on the base.
The minimum clearance between the outer wall of the shuttle-shaped air chamber and the inner wall of the cylindrical pipe is 5 mm.
The openings at the two ends of the cylindrical pipe are communicated with each other.
And openings communicated with the first air chamber and the second air chamber are formed at two ends of the shuttle-shaped air chamber respectively.
The first air chamber and the second air chamber are isolated by a partition plate arranged in the shuttle-shaped air chamber.
And as optimization, the first air chamber and the second air chamber are filled with porous sponge.
The length of the shuttle-shaped air chamber is smaller than that of the cylindrical pipe.
The invention has the beneficial effects that: the complementary correction method of the multi-air pressure sensor adopts a device with a complementary air pressure area to prepare a complementary air pressure sensor, then the average value of the air pressure values obtained by 2 air pressure sensors is obtained to obtain an air pressure correction value which is used as a final static air pressure measurement value (reflecting an actual atmospheric pressure value), the complementary principle of the air pressure sensor is that, as shown in figure 3, when local air flow passes through any end of a cylindrical pipe, an air chamber (a first air chamber or a second air chamber) in the air flow direction enters an air flow compression inner air chamber (such as a pitot tube principle) due to an opening, the air pressure value measured by the inner air pressure sensor is higher than the static air pressure value outside the cylindrical pipe, and an air chamber in the air flow direction is back to the air flow direction due to the opening, and a streamline-shaped outer wall of a shuttle-shaped air chamber is added, so that when the air flow is, the air pressure value read by the internal air pressure sensor is smaller than the static air pressure value outside the cylindrical pipe, so that when the read values of the two sensors are added to remove the average value, the static air pressure value close to the outside of the cylindrical pipe can be better obtained, more accurate air pressure values can be obtained through complementation, the problem that the read value of a single air pressure sensor cannot accurately reflect the air pressure value due to local air flow disturbance is effectively solved, and the correction method is particularly suitable for air pressure setting of unmanned planes such as quad-rotor unmanned planes, and the problem can be well solved because local air flow around the quad-rotor unmanned planes is greatly influenced by propellers.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a complementary air pressure sensor.
Fig. 2 is a schematic front view of a complementary barometric sensor.
Fig. 3 is a schematic view of the distribution of the flow of air introduced into the complementary air pressure sensor.
Fig. 4 is a schematic diagram of an optimized complementary air pressure sensor structure.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
Examples
As shown in fig. 1-2, in a method for complementary correction of multiple air pressure sensors, 2 air pressure sensors are mounted on a device having a complementary air pressure area to obtain complementary air pressure sensors, and then the air pressure values obtained by the 2 air pressure sensors are averaged to obtain an air pressure correction value.
The device with complementary pneumatic zones has two regions that are complementary: when the device is placed in a flowing gas stream, the pressure values in the two zones vary in magnitude in opposition, one increasing and one decreasing.
The complementary air pressure sensor comprises a base 1 and a cylindrical tube 2 transversely fixed on the base 1, wherein a shuttle-shaped air chamber 3 coaxial with the cylindrical tube 2 is arranged in the cylindrical tube 2; a first air chamber 3.1 and a second air chamber 3.2 are symmetrically arranged in the shuttle-shaped air chamber 3 along the cross section of the middle part of the shuttle-shaped air chamber; and a first air pressure sensor 4 and a second air pressure sensor 5 are respectively arranged in the first air chamber 3.1 and the second air chamber 3.2.
Pins of the first air pressure sensor 4 and the second air pressure sensor 5 are led out through leads and are electrically connected with an interface 6 arranged on the base 1.
The minimum clearance between the outer wall of the shuttle-shaped air chamber 3 and the inner wall of the cylindrical pipe 2 is 5 mm.
As shown in fig. 2, the shuttle-shaped air chamber 3 is fixed coaxially with the inner wall of the cylindrical tube 2 by two fixing rods. Thus, the openings at the two ends of the cylindrical pipe 2 can be ensured to be communicated with each other. Thereby creating a complementary pressure differential at the inlet end and the outlet end. Preferably, the pins of the first air pressure sensor 4 and the second air pressure sensor 5 are led out through the side wall of the cylindrical tube 2 by a lead embedded in the fixing rod and electrically connected with an interface 6 arranged on the base 1.
And openings respectively communicated with the first air chamber 3.1 and the second air chamber 3.2 are arranged at two ends of the shuttle-shaped air chamber 3.
The first air chamber 3.1 and the second air chamber 3.2 are isolated from each other by a partition provided in the shuttle-shaped air chamber 3, so that the first air chamber 3.1 and the second air chamber 3.2 are isolated from each other in an airtight manner.
As shown in fig. 4, as an optimized solution, the first air chamber 3.1 and the second air chamber 3.2 of the complementary air pressure sensor of the present invention are filled with porous sponge.
The length of the shuttle-shaped air chamber 3 is smaller than that of the cylindrical tube 2, and the distance between the two end parts of the shuttle-shaped air chamber 3 and the two end parts of the cylindrical tube 2 is larger than 10 mm.
The above are merely characteristic embodiments of the present invention, and do not limit the scope of the present invention in any way. All technical solutions formed by equivalent exchanges or equivalent substitutions fall within the protection scope of the present invention.
Claims (6)
1. A complementary correction method of a multi-air pressure sensor is characterized in that: installing the 2 air pressure sensors on a device with a complementary air pressure area to obtain complementary air pressure sensors, and then calculating an average value of air pressure values obtained by the 2 air pressure sensors to obtain an air pressure correction value;
the device with complementary pneumatic zones has two regions that are complementary: when the device is placed in a flowing gas stream, the pressure values in the two regions vary in magnitude in opposition, one increasing and one decreasing;
the complementary air pressure sensor comprises a base (1) and a cylindrical tube (2) transversely fixed on the base (1), wherein a shuttle-shaped air chamber (3) coaxial with the cylindrical tube (2) is arranged in the cylindrical tube; a first air chamber (3.1) and a second air chamber (3.2) are symmetrically arranged in the shuttle-shaped air chamber (3) along the cross section of the middle part of the shuttle-shaped air chamber; a first air pressure sensor (4) and a second air pressure sensor (5) are respectively arranged in the first air chamber (3.1) and the second air chamber (3.2);
openings which are respectively communicated with the first air chamber (3.1) and the second air chamber (3.2) are arranged at two ends of the shuttle-shaped air chamber (3);
the length of the shuttle-shaped air chamber (3) is less than that of the cylindrical pipe (2).
2. The method for complementary correction of multiple air pressure sensors according to claim 1, wherein: pins of the first air pressure sensor (4) and the second air pressure sensor (5) are led out through leads and are electrically connected with an interface (6) arranged on the base (1).
3. The method for complementary correction of multiple air pressure sensors according to claim 1, wherein: the minimum clearance between the outer wall of the shuttle-shaped air chamber (3) and the inner wall of the cylindrical pipe (2) is 5 mm.
4. The method for complementary correction of multiple air pressure sensors according to claim 1, wherein: openings at two ends of the cylindrical pipe (2) are communicated with each other.
5. The method for complementary correction of multiple air pressure sensors according to claim 1, wherein: the first air chamber (3.1) and the second air chamber (3.2) are isolated by a clapboard arranged in the shuttle-shaped air chamber (3).
6. The method for complementary correction of multiple air pressure sensors according to claim 1, wherein: and porous sponge is filled in the first air chamber (3.1) and the second air chamber (3.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910656861.8A CN110361133B (en) | 2019-07-19 | 2019-07-19 | Complementary correction method for multiple air pressure sensors |
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| CN201910656861.8A CN110361133B (en) | 2019-07-19 | 2019-07-19 | Complementary correction method for multiple air pressure sensors |
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| CN110361133A CN110361133A (en) | 2019-10-22 |
| CN110361133B true CN110361133B (en) | 2021-05-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR890010548A (en) * | 1987-12-16 | 1989-08-09 | 로버트 제이. 에드워즈 | Dual pressure sensor |
| US8061213B2 (en) * | 2009-01-22 | 2011-11-22 | Kulite Semiconductor Products, Inc. | High temperature, high bandwidth pressure acquisition system |
| JP2015074387A (en) * | 2013-10-10 | 2015-04-20 | 株式会社東海理化電機製作所 | Tire position determination system |
| CN207395946U (en) * | 2017-04-06 | 2018-05-22 | 上海海洋大学 | A kind of simple pressure equalizing structure |
| CN107462348A (en) * | 2017-09-30 | 2017-12-12 | 南阳理工学院 | For temperature, blast, measuring wind speed multi-parameter optical fiber optical grating sensor |
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Effective date of registration: 20210510 Address after: 341000 south of Gantong Avenue, north of Weiyi Road, east of Haisheng cemented carbide project, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province (plant of Jiade company) Applicant after: JIANGXI JADE IOT SENSING TECHNOLOGY Co.,Ltd. Address before: Room 1104, No.178, building 31, Dushi Nanshan, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Applicant before: Li Dan |
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