Aeronautical device calibration apparatus and calibration method
By using aviation equipment calibration devices and methods, and simulating high-altitude environments with pressure environment chambers and aviation parameter simulation testers, the problem that aviation measurement equipment cannot reflect high-altitude environments during ground testing is solved, thus improving the measurement accuracy and reliability of the equipment in high-altitude environments.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHANGHAI AIRCRAFT MFG
- Filing Date
- 2024-12-13
- Publication Date
- 2026-06-18
AI Technical Summary
Existing aerial measurement equipment cannot reflect the effects of the high-altitude environment in routine ground tests, resulting in insufficient measurement accuracy and reliability in real high-altitude environments.
An aviation equipment calibration device is provided, including a pressure environment chamber, a pressure source module, a standard pressure generator, and an aviation parameter simulation tester. It performs calibration by simulating a high-altitude environment and uses the standard pressure generator and aviation parameter simulation tester to provide accurate standard inputs and environmental parameter simulations for aviation measurement equipment.
It improves the measurement accuracy and reliability of aerial measurement equipment in high-altitude environments, enables calibration on the ground to simulate high-altitude environments, and ensures the performance indicators of the equipment in complex environments.
Smart Images
Figure CN2024139102_18062026_PF_FP_ABST
Abstract
Description
Aviation equipment calibration devices and calibration methods Technical Field
[0001] This disclosure relates to the field of metrology and calibration, and more specifically, to a calibration apparatus for aviation equipment and a calibration method using the calibration apparatus. Background Technology
[0002] Calibration of airborne surveying equipment is a critical step in ensuring its accuracy and reliability. Calibration devices and methods ensure the precision and reliability of airborne surveying equipment in various complex environments, thereby guaranteeing the safety and efficiency of air travel.
[0003] Airborne atmospheric pressure sensors are typically mounted on the surface of aircraft. They sense information such as airflow pressure, airflow direction, and temperature around the fuselage, and then calculate various flight atmospheric parameters related to atmospheric data. Their operating environment is generally a low-pressure, low-temperature high-altitude environment. Therefore, conventional laboratory calibration tests can only guarantee their performance indicators under normal conditions and cannot reflect the impact of complex environmental factors on the operating state of airborne atmospheric pressure sensors.
[0004] Similarly, routine ground tests on other aerial measurement equipment (such as altimeters and airspeed indicators) can only guarantee their performance indicators under normal conditions and cannot reflect the impact of the high-altitude environment on the equipment.
[0005] Therefore, if atmospheric pressure sensors or other aerial measurement equipment can be calibrated in a simulated high-altitude environment on the ground, the measurement accuracy and reliability of the relevant equipment in a real high-altitude environment can be greatly improved. Summary of the Invention
[0006] In view of the above technical issues, the present invention provides a simulated high-altitude environment for the calibration of aviation measurement equipment, including atmospheric pressure sensors, by simulating the pressure and / or temperature environment during high-altitude flight. It proposes an aviation equipment calibration device for simulating aviation environment on the ground and a calibration method using the calibration device.
[0007] According to a first aspect of the present invention, an aviation equipment calibration apparatus for ground-based simulated aviation environments is provided, comprising:
[0008] A pressure environment chamber, the interior of which can accommodate calibration objects, and the outer wall of the pressure environment chamber includes multiple pressure ports and at least one electrical port;
[0009] A pressure source module, wherein the pressure source module is connected to the pressure environment chamber via at least one of the plurality of pressure interfaces to regulate the pressure in the pressure environment chamber;
[0010] Standard pressure generator;
[0011] A process recorder is connected to the calibration object via the electrical interface of the pressure environment chamber to record the output values of the calibration object;
[0012] The characteristic feature is that the aviation equipment calibration device further includes an aviation parameter simulation tester, which includes a static pressure port and a dynamic pressure port.
[0013] In atmospheric pressure sensor calibration mode, the calibration object is the atmospheric pressure sensor. The static and dynamic pressure ports of the aerospace parameter simulation test apparatus are connected to the two pressure interfaces of the pressure environment chamber. The standard pressure generator is connected to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber, providing a standard pressure input to the atmospheric pressure sensor.
[0014] In the calibration mode for other airborne measurement equipment, the calibration object is other airborne measurement equipment besides atmospheric pressure sensors. The standard pressure generator is connected to the pressure interface of the pressure environment chamber, and the static pressure port and dynamic pressure port of the airborne parameter simulation tester are connected to the pressure input port of the other airborne measurement equipment through the two pressure interfaces of the pressure environment chamber.
[0015] The aviation equipment calibration device of this application provides a more accurate standard pressure for atmospheric pressure sensors during calibration using a higher-precision standard pressure generator. For other aviation measurement equipment calibration, an aviation parameter simulation tester provides standard inputs, such as standard airspeed and altitude. Furthermore, in atmospheric pressure sensor calibration mode, the aviation parameter simulation tester displays environmental parameters such as pressure within the pressure environment chamber; in other aviation measurement equipment calibration modes, the standard pressure generator displays these parameters, eliminating the need for a separate pressure gauge to monitor the pressure inside the pressure environment chamber.
[0016] According to a second aspect of the present invention, a method for calibrating equipment using the aviation equipment calibration apparatus of the first aspect is provided, comprising:
[0017] The calibration object is determined, which is an atmospheric pressure sensor or other airborne measurement equipment other than an atmospheric pressure sensor;
[0018] The pipeline connection is performed according to the calibration object. When the calibration object is an atmospheric pressure sensor, the standard pressure generator is connected to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber, and the static pressure port and dynamic pressure port of the aerospace parameter simulation tester are connected to the pressure interface of the pressure environment chamber. When the calibration object is other aerospace measuring equipment, the dynamic pressure port and static pressure port of the aerospace parameter simulation tester are connected to the pressure input port of the other aerospace measuring equipment through the pressure interface of the pressure environment chamber, and the standard pressure generator is connected to the pressure interface of the pressure environment chamber.
[0019] The pressure source module is used to generate a preset pressure in the pressure environment chamber;
[0020] The simulation environment is confirmed, wherein, in the atmospheric pressure sensor calibration mode, the environment inside the pressure environment chamber is confirmed to meet the expected simulation environment based on the reading of the aviation parameter simulation tester, and in other aviation measurement equipment calibration modes, the environment is confirmed to meet the expected simulation environment based on the reading of the standard pressure generator.
[0021] Record the values of the process recorder at each calibration point; and
[0022] Calibration is performed based on the recorded standard input and the output of the calibration object.
[0023] By using the above methods, it is possible to obtain similar beneficial technical effects to the aviation equipment calibration device of this application. Attached Figure Description
[0024] In the accompanying drawings, embodiments of the present application are illustrated by way of example and not limitation. For a better understanding of the above and other objects, features, advantages, and functions of the invention, reference can be made to the preferred embodiments shown in the drawings. Like reference numerals in the drawings refer to like parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and are not intended to limit the scope of the invention.
[0025] Figure 1 shows a schematic diagram of the pressure environment chamber of the aviation equipment calibration device of this application.
[0026] Figure 2 shows an overall schematic diagram of the aviation equipment calibration device of this application.
[0027] List of reference numerals: 1. Aeronautical parameter simulation test chamber; 2. Vacuum pump; 3. Pressure pump; 4. Shut-off valve; 5. Temperature environment chamber; 6. Temperature sensor interface; 7. Pressure environment chamber; 8. Temperature instrument; 9. Process recorder; 10. Standard pressure generator. Detailed Implementation
[0028] The technical solutions of this application will now be clearly and completely described with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Those skilled in the art can construct or obtain other embodiments based on the described embodiments without any creative effort. Therefore, the described embodiments are merely exemplary and not restrictive.
[0029] Referring to Figure 1, Figure 1 shows a schematic diagram of the pressure environment chamber of the aviation equipment calibration apparatus of this application. The pressure environment chamber 7 is a device for providing a sealed environment for the calibration object, and is made of a material with good airtightness and thermal conductivity. As shown in Figure 1, the pressure environment chamber 7 can be a cylindrical structure, including at least one electrical interface 13 and at least one pressure interface 11, 12 on its wall. At least one electrical interface 13 is used to realize electrical connection between the inside and outside of the pressure environment chamber 7. For example, equipment outside the pressure environment chamber 7 is connected to the part of the electrical interface 13 located outside the wall of the pressure environment chamber 7, while equipment inside the pressure environment chamber 7 is connected to the part of the electrical interface 13 located inside the wall of the pressure environment chamber 7, thereby realizing electrical connection between external and internal equipment. The electrical interface 13 can be any type of connection port as required and is not particularly limited. At least one pressure interface 11, 12 is used to realize pressure connection between the inside and outside of the pressure environment chamber 7. For example, equipment outside the pressure environment chamber 7 (such as the standard pressure generator 10 shown in Figure 2) is connected to the portion of the pressure ports 11 and 12 located outside the pressure environment chamber 7, while equipment inside the pressure environment chamber 7 is connected to the portion of the pressure ports 11 and 12 located inside the pressure environment chamber 7, thereby achieving pressure connection between external and internal equipment. Alternatively, equipment such as a pressure source module can be connected to the portion of the pressure ports 11 and 12 located outside the pressure environment chamber 7 to inject or extract pressure into the pressure environment chamber 7. A temperature sensor is installed inside the pressure environment chamber 7 to sense the internal temperature and transmits the temperature data to an external device, such as the temperature instrument 8 shown in Figure 2, via the temperature sensor interface 6.
[0030] Referring to Figure 2, which shows an overall schematic diagram of the aviation equipment calibration device of this application, the pressure source module includes a vacuum pump 2 and a pressure pump 3. The vacuum pump 2 and pressure pump 3 are connected to pressure ports 11, 12, etc., on the pressure environment chamber 7 via cryogenic hoses. The vacuum pump 2 draws pressure from the pressure environment chamber 7 to reduce the pressure inside the chamber, while the pressure pump 3 supplies pressure to the chamber to increase the pressure inside. A shut-off valve 4 is provided between the vacuum pump 2 and pressure pump 3 and the pressure environment chamber 7 to disconnect the pressure connection between them. When the shut-off valve 4 is closed, neither the vacuum pump 2 nor the pressure pump 3 can draw or supply pressure to the pressure environment chamber 7, and the pressure in the chamber is maintained. Obviously, those skilled in the art will understand that the vacuum pump 2 and pressure pump 3 in this example can also be combined into a single pressure source device, thereby reducing costs and facilitating control.
[0031] Referring again to Figure 2, the aviation equipment calibration apparatus of this application also includes a process recorder 9. The process recorder 9 is connected to the calibration object inside the pressure environment chamber 7 via an electrical interface, and records the output value of the calibration object.
[0032] The aviation equipment calibration apparatus of this application also includes a standard pressure generator 10. The standard pressure generator 10 can generate stable and accurate pressure, typically with high precision, and therefore can serve as a standard pressure source for calibrating pressure measuring instruments. By comparing the output value of the pressure measuring instrument with the standard input pressure points provided by the standard pressure generator, the measurement error of the pressure measuring instrument at each standard pressure point can be obtained, and calibration can be performed based on this error to obtain a calibrated pressure measuring instrument. Furthermore, the standard pressure generator can also display the current ambient pressure during operation.
[0033] Furthermore, the aviation equipment calibration apparatus of this application also includes an aviation parameter simulation tester 1. The aviation parameter simulation tester includes a static pressure port and a dynamic pressure port. When the static pressure port and dynamic pressure port of the aviation parameter simulation tester are connected to aviation measuring equipment, such as an airspeed indicator, the airspeed indicator calculates the airspeed based on the relationship between static and dynamic pressure. By providing static and dynamic pressure, the aviation parameter simulation tester can provide a simulated environment for the aviation measuring equipment. More specifically, for example, when it is expected that the aviation parameter simulation tester should provide an airspeed of 500 km / h, the aviation parameter simulation tester calculates the values at the static and dynamic pressure ports, and the airspeed indicator then calculates the airspeed based on these measured values. In this way, the airspeed indicator can be calibrated by comparing the difference between the standard input of the aviation parameter simulation tester and the measured value of the airspeed indicator. Of course, the airspeed indicator is only one example of aviation measuring equipment; other equipment such as an altimeter may also be included, which will not be elaborated here. In addition, the aviation parameter simulation tester can also display information such as ambient pressure and altitude.
[0034] In this application, an aviation equipment calibration device that is easy to use and has higher reliability is constructed based on the characteristics of the standard pressure generator 10 and the aviation parameter simulation tester 1, which can provide standard input or display of environmental pressure according to different needs.
[0035] Specifically, when calibrating an atmospheric pressure sensor, an atmospheric pressure sensor is installed inside the pressure environment chamber 7. A standard pressure generator 10 is connected to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber 7, providing a standard pressure input to the atmospheric pressure sensor. The static pressure port and dynamic pressure port of the aviation parameter simulation test apparatus 1 are connected to the pressure interface of the pressure environment chamber 7, allowing the pressure inside the pressure environment chamber 7 to be observed through the aviation parameter simulation test apparatus 1.
[0036] When other aviation measurement equipment (such as airspeed indicators and altimeters) needs to be calibrated, this equipment is placed inside the pressure environment chamber 7. The dynamic and static pressure ports of the aviation parameter simulation tester 1 are connected to the pressure input port of the other aviation measurement equipment through the pressure interface of the pressure environment chamber 7. The aviation parameter simulation tester 1 provides standard input, such as standard airspeed, to the other aviation measurement equipment. The standard pressure generator 10 is only connected to the pressure interface of the pressure environment chamber 7 and is not connected to the aviation measurement equipment. The ambient pressure inside the pressure environment chamber 7 can be observed through the standard pressure generator 10.
[0037] With this setup, during atmospheric pressure sensor calibration, a more accurate standard pressure generator provides a more precise standard pressure to atmospheric pressure sensor 10. Conversely, during calibration of other airborne measurement equipment, an airborne parameter simulation tester provides standard inputs such as standard airspeed and altitude. Furthermore, in atmospheric pressure sensor calibration mode, the airborne parameter simulation tester 1 displays environmental parameters such as pressure within the pressure environment chamber 7, while in other airborne measurement equipment calibration modes, the standard pressure generator 10 displays these parameters, eliminating the need for a separate pressure gauge to monitor the pressure inside the pressure environment chamber.
[0038] Furthermore, the aviation equipment calibration device of this application also includes a temperature environment chamber 5, which surrounds a pressure environment chamber 7 and is made of insulating material to provide a temperature environment for the pressure environment chamber 7. A temperature generating device is installed in the temperature environment chamber 5. The temperature generating device can raise or lower the temperature in the temperature environment chamber 5. The temperature generating device in the temperature environment chamber 5 can be controlled feedback based on the measured value of the temperature sensor in the pressure environment chamber 7, thereby ensuring that the temperature in the pressure environment chamber 7 is at the desired value. The temperature environment chamber 5 has reserved openings on its walls through which the pipelines of various devices connect to the pressure environment chamber 7.
[0039] The following describes, by way of example, a method for calibration using the aviation equipment calibration device of this application.
[0040] Step 1: Determine the calibration target based on requirements. The calibration target is an atmospheric pressure sensor or other airborne measurement equipment besides an atmospheric pressure sensor, such as an airspeed indicator or altimeter.
[0041] Step 2: Perform pipeline connections according to the calibration target. When calibrating an atmospheric pressure sensor, install the atmospheric pressure sensor inside the pressure environment chamber 7, and connect the standard pressure generator 10 to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber 7. Connect the static and dynamic pressure ports of the aerospace parameter simulation tester 1 to the pressure interface of the pressure environment chamber 7. When calibrating other aerospace measuring equipment, install the other aerospace measuring equipment inside the pressure environment chamber 7, and connect the dynamic and static pressure ports of the aerospace parameter simulation tester 1 to the pressure input port of the other aerospace measuring equipment through the pressure interface of the pressure environment chamber 7. Connect the standard pressure generator 10 to the pressure interface of the pressure environment chamber 7. Connect the vacuum pump 2 and pressure pump 3 to the pressure interfaces on the pressure environment chamber 7, etc. Connect the process recorder 9 to the output of the calibration target through the electrical interface on the pressure environment chamber 7.
[0042] Step 3: Create a simulated environment. In this step, pressure source modules, including vacuum pump 2 and pressure pump 3, operate to generate a preset pressure.
[0043] In this example, the pressure range could be, for example, 1-265 kPa.
[0044] Step 4: Confirm the simulated environment. In atmospheric pressure sensor calibration mode, the airborne parameter simulation tester 1 displays environmental parameters such as pressure inside pressure environment chamber 7. In other airborne measurement equipment calibration mode, the standard pressure generator 10 displays environmental parameters such as pressure inside pressure environment chamber 7.
[0045] Step 5: Record the values from the process recorder 9 at each calibration point. Calibration points are pre-set points as needed. For example, in the case of atmospheric pressure sensor calibration, calibration points can be set every 1 kPa in the range of 1-265 kPa. In the case of airspeed sensor calibration, calibration points can be set every 1 km / h in the range of 30-1200 km / h.
[0046] Step 6: Based on the recorded standard input and the output of the calibration object, i.e., the recorded data of process recorder 9, perform calibration according to various calibration methods. As an example, calibration can be performed by referring to "JJG 860-2015 Verification Procedure for Pressure Sensors (Static)".
[0047] By using the above-described calibration method with the aviation equipment calibration device of this application, similar beneficial technical effects as those of the aviation equipment calibration device of this application can be obtained.
[0048] The content of this application has become clear through the description of the above embodiments. Those skilled in the art should understand that the above detailed description is illustrative only and not restrictive. Therefore, the scope of this application should be determined with reference to the appended claims.
Claims
1. An aviation equipment calibration device for ground-based simulated aviation environments, comprising: A pressure environment chamber, the interior of which can accommodate calibration objects, and the outer wall of the pressure environment chamber includes multiple pressure ports and at least one electrical port; A pressure source module, wherein the pressure source module is connected to the pressure environment chamber via at least one of the plurality of pressure interfaces to regulate the pressure in the pressure environment chamber; Standard pressure generator; A process recorder is connected to the calibration object via the electrical interface of the pressure environment chamber to record the output values of the calibration object; The characteristic feature is that the aviation equipment calibration device further includes an aviation parameter simulation tester, which includes a static pressure port and a dynamic pressure port. In atmospheric pressure sensor calibration mode, the calibration object is the atmospheric pressure sensor. The static and dynamic pressure ports of the aerospace parameter simulation test apparatus are connected to the two pressure interfaces of the pressure environment chamber. The standard pressure generator is connected to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber, providing a standard pressure input to the atmospheric pressure sensor. In the calibration mode for other airborne measurement equipment, the calibration object is other airborne measurement equipment besides atmospheric pressure sensors. The standard pressure generator is connected to the pressure interface of the pressure environment chamber, and the static pressure port and dynamic pressure port of the airborne parameter simulation tester are connected to the pressure input port of the other airborne measurement equipment through the two pressure interfaces of the pressure environment chamber.
2. The aviation equipment calibration device according to claim 1, characterized in that, The aviation equipment calibration device also includes: A temperature environment chamber, wherein a temperature generating device is installed inside the temperature environment chamber, and a pressure environment chamber is installed inside the temperature environment chamber; and Temperature instrument A temperature sensor is installed inside the pressure environment chamber, and The temperature instrument is connected to the temperature sensor through the interface of the pressure environment chamber to display the temperature sensed by the temperature sensor.
3. The aviation equipment calibration device according to claim 2, characterized in that, In the atmospheric pressure sensor calibration mode, at least one parameter within the pressure environment chamber is displayed by the aerospace parameter simulation tester. In the calibration mode of the other airborne measurement equipment, at least one standard input of the other airborne measurement equipment is provided by the airborne parameter simulation tester, and at least one parameter in the pressure environment chamber is displayed by the standard pressure generator.
4. The aviation equipment calibration device according to claim 3, characterized in that, In the atmospheric pressure sensor calibration mode, at least one parameter within the pressure environment chamber includes the pressure within the chamber and / or the simulated altitude. In the calibration mode of the other airborne measurement equipment, at least one standard input of the other airborne measurement equipment includes pressure, simulated altitude, and / or simulated airspeed.
5. The aviation equipment calibration device according to claim 1, characterized in that, The other airborne measuring equipment includes at least one of airspeed gauges and altimeters.
6. The aviation equipment calibration device according to claim 2, characterized in that, The temperature in the ambient temperature chamber is controlled by the output of the temperature instrument.
7. The aviation equipment calibration device according to claim 1, characterized in that, The pressure source module also includes a shut-off valve disposed between the pressure source and the pressure environment chamber, used to disconnect the pressure connection between the pressure source and the pressure environment chamber.
8. A method for calibrating equipment using the aviation equipment calibration apparatus according to claims 1-7, comprising: The calibration object is determined, which is an atmospheric pressure sensor or other airborne measurement equipment other than an atmospheric pressure sensor; The pipeline connection is performed according to the calibration object. When the calibration object is an atmospheric pressure sensor, the standard pressure generator is connected to the pressure input port of the atmospheric pressure sensor through the pressure interface of the pressure environment chamber, and the static pressure port and dynamic pressure port of the aerospace parameter simulation tester are connected to the pressure interface of the pressure environment chamber. When the calibration object is other aerospace measuring equipment, the dynamic pressure port and static pressure port of the aerospace parameter simulation tester are connected to the pressure input port of the other aerospace measuring equipment through the pressure interface of the pressure environment chamber, and the standard pressure generator is connected to the pressure interface of the pressure environment chamber. The pressure source module is used to generate a preset pressure in the pressure environment chamber; The simulation environment is confirmed, wherein, in the atmospheric pressure sensor calibration mode, the environment inside the pressure environment chamber is confirmed to meet the expected simulation environment based on the reading of the aviation parameter simulation tester, and in other aviation measurement equipment calibration modes, the environment is confirmed to meet the expected simulation environment based on the reading of the standard pressure generator. Record the values of the process recorder at each calibration point; and Calibration is performed based on the recorded standard input and the output of the calibration object.
9. The method according to claim 8, characterized in that, In the atmospheric pressure sensor calibration mode, the readings of the aviation parameter simulation tester include the pressure inside the pressure environment chamber and / or the simulated altitude; in the other aviation measurement equipment calibration mode, the readings of the standard pressure generator include the pressure inside the pressure environment chamber.
10. The method according to claim 8, characterized in that, After confirming that the environment meets the desired simulation environment, the shut-off valve of the aviation equipment calibration device is closed.
11. The method according to claim 8, characterized in that, The method further includes controlling the temperature in the temperature environment chamber by using the output of the temperature instrument as feedback.