Method for identifying aircraft, method for measuring aircraft noise and method for judging signals using same, and aircraft identification device

A technology for identifying methods and measuring methods, applied to measuring devices, vibration measurement in fluids, measuring vibrations, etc.

Inactive Publication Date: 2011-06-15
NITTOBO ACOUSTIC ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, continuous measurement is required for at least one week, and sometimes throughout the year in many cases, so it has to rely on unmanned automatic measurement using an automatic measurement device

Method used

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  • Method for identifying aircraft, method for measuring aircraft noise and method for judging signals using same, and aircraft identification device
  • Method for identifying aircraft, method for measuring aircraft noise and method for judging signals using same, and aircraft identification device
  • Method for identifying aircraft, method for measuring aircraft noise and method for judging signals using same, and aircraft identification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Examples of Aircraft Noise and Electric Field Intensity Measurement (Military Aircraft)

[0085] In order to measure aircraft noise, aircraft flight routes, flight altitudes, and number of flights, etc., a measurement point was set up about 1.5km north of Atsugi Airport in Kana Prefecture, which is jointly used by the U.S. Navy and the Maritime Self-Defense Force. The noise meter is also equipped with 4.3GHz frequency band frequency scanning radio wave, the same as above 4.3GHz frequency band pulse radio wave, 9GHz frequency band frequency scanning radio wave, and each receiving device of the same 9GHz frequency band pulse radio wave, so that the radio wave receiving signal passes through figure 1 The circuit shown, inputs and records each electric field strength level into the computer.

[0086] figure 2 Shown is an example of measuring the aircraft noise of a military aircraft and the electric field strength of a radio altimeter. The electric field intensity level ...

Embodiment 2

[0095] Examples of Aircraft Noise and Electric Field Intensity Measurement (Civil Aircraft)

[0096] With the same method as embodiment 1, the example of measuring the aircraft noise of civil aircraft and the radio wave electric field strength of radio altimeter is as image 3 shown. Recorded the electric field strength level FS and noise level fluctuation NL of the radio altimeter in the frequency scanning mode.

[0097] Shown below is the automatic measurement result data of the civil aircraft during the actual takeoff from 20:04 to 20:26 on February 11, 2008, and the information obtained by visual inspection and listening to the aviation band near the airport.

[0098] (6) From 20:06 to 20:08, civil aircraft B888-200 passed through Qualcomm in the air. In the automatic measurement, the peak of the noise level fluctuation NL is detected, and the electric wave of the frequency sweep FS is detected at the same time.

[0099] (8) From 20:10 to 20:12, civil aircraft B868-300 ...

Embodiment 3

[0103] Examples of Aircraft Noise and Electric Field Intensity Measurement (Civil Aircraft and Military Aircraft)

[0104] With the same method as embodiment 1, the aircraft noise of civil aircraft and military aircraft and the electric wave electric field strength measurement example of electric wave altimeter are as Figure 4 shown. The electric field strength level FS of the radio wave altimeter in the frequency scanning method, the electric field strength level of the radio wave altimeter in the 4.3GHz pulse method (4.3G), and the electric field strength level of the radio wave altimeter in the 9GHz frequency band scanning method P (9G), and noise level fluctuation NL. The data that meet the set conditions and record the maximum noise level and occurrence time on the automatic measuring device are indicated by o marks.

[0105] Shown below is the automatic measurement result data when the actual aircraft took off between 9:40 and 9:50 on January 19, 2008, as well as the ...

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Abstract

Disclosed is a method of identifying aircraft including civilian aircraft and military aircraft. Each aircraft flying overhead is automatically identified by analyzing either frequency sweeps or differences in pulse modulation systems and / or polarization planes of the electric radiation emitted by the aircraft in the form of radio altimeter waves, air and surface scanning waves, meteorological radar signals, IFF (Identification Friend or Foe) signals, and / or radio waves from the transponder reply signals. Then, the aircraft noise at locations where the flight airspaces of civilian aircraft and military aircraft overlap is automatically measured. Moreover, the automatic aircraft identification data that has been arithmetically processed using the automatic aircraft identification method is used as a trigger for starting noise measurement or for signal judgment using statistical processing.

Description

technical field [0001] The invention relates to a technology for automatically identifying the aircraft that is the source of the measured aircraft noise in the aspect of aircraft noise measurement. technical background [0002] The noise generated by aircraft is very loud and disturbs the lives of people living near airports and flight routes. In particular, the noise emitted at night disturbs sleep and has a great impact on health. Therefore, it is very important to measure aircraft noise with good accuracy and to study and formulate its countermeasures. [0003] Currently, noise measurement is carried out by local governments, airport managers, etc. Since aircraft noise has a wide range of influence, it will change greatly depending on the season and time period, weather conditions, and the operating status of the airport (the difference between the runway used and the direction of take-off and landing), etc., so in order to measure aircraft noise with good accuracy Noi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G5/00G01H3/00
CPCG08G5/0078G01H3/00G08G5/00
Inventor 大桥心耳山下晃一
Owner NITTOBO ACOUSTIC ENG CO LTD
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