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Online correction method for realizing long-term stability of atmospheric data measurement

An atmospheric data and stable technology, applied in measurement devices, fluid pressure measurement, height/level measurement, etc., can solve the problems of long time consumption and cumbersome process, and achieve the effect of short time consumption, simple method and easy operation.

Active Publication Date: 2021-03-09
CHENGDU KAITIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has disadvantages such as the need for high and low temperature chambers, the need to disassemble the air data measurement device from the aircraft, the need for special testing equipment, cumbersome procedures, and a long time-consuming process.

Method used

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  • Online correction method for realizing long-term stability of atmospheric data measurement
  • Online correction method for realizing long-term stability of atmospheric data measurement
  • Online correction method for realizing long-term stability of atmospheric data measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment proposes an online correction method for realizing long-term stability of atmospheric data measurement, which specifically includes the following steps:

[0049] Step 1: Apply a pressure of P1 to the pressure port of the air data measuring device 1 through the external standard pressurization device 6 . The pressure port is the pressure port corresponding to the pressure to be corrected.

[0050] Step 2: Send a "first point test command" to the air data measuring device 1 through the display control system 15 installed on the aircraft 14 or other special test equipment and equivalent equipment. The "first point test command" is a command sent from an external device to the air data measuring device 1 .

[0051] Step 3: After the air data measuring device 1 receives the "first point test command", the software in the air data measuring device 1 enters the correction mode; after entering the correction mode, the air data measuring device 1 realizes the pr...

Embodiment 2

[0094] This embodiment is on the basis of above-mentioned embodiment 1, as figure 1 , figure 2 , image 3 , Figure 4 As shown, this embodiment uses an example of correcting the dynamic pressure atmospheric parameters measured by the atmospheric data measuring device 1 on the aircraft 14 for illustration. The dynamic pressure original parameters are obtained by measuring the internal differential pressure silicon piezoresistive sensor.

[0095] Such as figure 1 As shown, the air data measuring device used in this example has four types of pressure ports, namely: total pressure port 2 of the air data measuring device, static pressure port 3 of the air data measuring device, and pressure port 4 on the upper surface of the probe of the air data measuring device , and the pressure port on the lower surface of the air data measuring device probe at the opposite end of the pressure port 4 on the upper surface of the air data measuring device probe.

[0096] The atmospheric dyna...

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Abstract

The invention relates to an online correction method for realizing long-term stability of atmospheric data measurement, which is used for correcting a pressure value P of an atmospheric data measurement device of an aircraft and comprises the following steps of firstly, selecting a first test point and a second test point on a pressure port to be corrected of the atmospheric data measurement device, then respectively applying pressures with different pressure values to the first test point and the second test point in sequence through external standard pressurizing equipment, and measuring andcalculating to obtain a first point test correction coefficient P1Z and a second point test correction coefficient P2F, and correcting the pressure value P of the atmospheric data measurement deviceaccording to the first point test correction coefficient P1Z and the second point test correction coefficient P2F, and resolving the atmospheric pressure height Hb, the airspeed Vi, the mach number Mand the lifting speed HR.

Description

technical field [0001] The invention belongs to the technical field of aircraft air data measurement, and in particular relates to an online correction method for realizing long-term stability of air data measurement. Background technique [0002] The aircraft relies on the real-time relative movement of itself and the surrounding airflow to complete the flight action. Atmospheric parameters such as air pressure altitude, airspeed, Mach number, and ascending and descending speed are necessary information for the aircraft to complete flight control, and are crucial to ensure flight safety. [0003] These parameters are mainly measured by air data measuring devices. However, the atmospheric data measurement devices based on the HB6127 flight atmospheric parameter standard for atmospheric parameter calculation, especially the atmospheric data measurement devices based on silicon piezoresistive sensors, will drift after a period of use. For example, after a certain air data me...

Claims

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Application Information

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IPC IPC(8): G01L9/02G01L13/06G01C5/06G01C5/00
CPCG01L9/02G01L13/06G01C5/06G01C5/005
Inventor 粟强杨德祥章德生刘义明裴希伍唐旭谢波张胤颖李微
Owner CHENGDU KAITIAN ELECTRONICS
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