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TCAS target hybrid monitoring implementation method

A technology for realizing methods and goals, which is applied in the field of TCAS target mixed monitoring, can solve problems such as not being able to fully reduce spectrum usage, and achieve the effect of reasonable monitoring mode and reduced spectrum occupancy

Active Publication Date: 2019-11-22
四川九洲空管科技有限责任公司
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AI Technical Summary

Problems solved by technology

[0015] The purpose of hybrid surveillance is mainly to reduce the inquiry frequency of S-mode targets, thereby reducing the spectrum occupation of 1030Mhz / 1090Mhz in the airspace. The passive surveillance mode of the existing technology uses low-frequency active inquiry, which cannot fully reduce spectrum usage.

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  • TCAS target hybrid monitoring implementation method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] This embodiment first defines three monitoring states as follows:

[0036] Active monitoring mode: Monitor C-mode targets and S-mode targets (including S-mode transponders with ADS-B OUT function) through C-mode calls and S-mode roll call inquiries; the nominal period of monitoring inquiries is 1Hz, and S-mode The simplified query cycle is 5Hz.

[0037] Mixed monitoring mode: For S-mode transponders with ADS-B OUT function, passively listen to broadcast messages (here, the format of broadcast messages is selected as DF17 format), receive the target longitude, latitude and altitude signals, and combine the corresponding information of the machine The target monitoring is completed; then the target is confirmed in the way of dynamic active monitoring, and the monitoring cycle of active monitoring changes dynamically between 10s and 60s;

[0038] Passive monitori...

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Abstract

The invention relates to the technical field of airborne collision avoidance, and discloses a TCAS target hybrid monitoring implementation method. According to the method, the approaching time of theactive monitoring distance and height is set, whether effective determination conditions exist or not is actively inquired, and conversion between an active monitoring mode and a hybrid monitoring mode is achieved; determination conditions for determining whether ADS-B signals and local / target machine information are effective or not are set to achieve conversion between a passive monitoring modeand a hybrid monitoring mode; ADS-B signal determination conditions are set to achieve conversion from a passive monitoring mode to an active monitoring mode, and active monitoring cannot be directlyconverted into passive monitoring. The frequency spectrum occupation is further reduced; and when the condition is not satisfied, the mode is converted to an active monitoring mode or a partial passive monitoring mode. According to the scheme, when passive monitoring conditions are met, a full passive monitoring mode is adopted, and spectrum occupation is further reduced; and moreover, when the passive monitoring condition is not met, the mode is converted to an active monitoring mode or a partial passive monitoring mode so as to sufficiently reduce the spectrum usage.

Description

technical field [0001] The invention relates to the technical field of airborne collision avoidance, in particular to a method for realizing mixed monitoring of TCAS targets. Background technique [0002] Airborne Collision Avoidance System (ACAS-Airborne Collision Avoidance System, also known as TCAS-Traffic Alert and Collision Avoidance System), currently used in military and civil aviation is generally TCASII type collision avoidance system, which can provide Traffic Alert (TA) and Decision Alert ( RA). TCAS is an essential device to prevent dangerous approaches and collisions of aircraft in the air, and it can work independently of the ground traffic control system. The function and performance index of the system shall meet the minimum performance standard of RTCA / DO185B. The system is mainly used to provide air safety separation guarantee for aircraft, and uses secondary radar to detect approaching aircraft in the nearby airspace. When necessary, it reminds pilots to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G5/00G08G5/04G08G5/06B64D45/00
CPCB64D45/00G08G5/0008G08G5/045G08G5/065
Inventor 李洪伟
Owner 四川九洲空管科技有限责任公司
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