JPH0347471B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radar system, and particularly to a radar system for landing guidance of an aircraft, etc., which is equipped with an altitude scanning antenna and an azimuth scanning antenna, in which the set angles of the altitude scanning antenna and the azimuth scanning antenna are set as described above. This invention relates to a radar system that automatically makes corrections according to the angular position of an aircraft, etc.

In conventional precision approach radars for landing guidance of aircraft, etc., as shown in FIG. A pair of fan beams of the azimuth scanning beam 4 are scanned over a range of scanning widths 5 and 6, respectively, to measure the elevation angular position and azimuth angular position of the aircraft 1, and at the same time, the distance to the aircraft 1 is measured, After accurately ascertaining the location of 1, the aircraft will guide the aircraft to a safe landing. For this purpose, the precision approach radar 2 is equipped with an elevation scanning antenna 7 and an azimuth scanning antenna 8 as shown in FIG. It is done through. When the aircraft 1 is actually guided via the elevation scanning beam 3 and the azimuth scanning beam 4 as described above, the aircraft 1 is guided through the elevation scanning beam 3 and the azimuth scanning beam 4, respectively, as shown in FIG. 3a. If the position of the aircraft 1 is outside the range of scanning widths 5 and 6 of Nor can they be guided. In such a case, conventionally, the operator of the precision approach radar 2 has to monitor the aircraft 1 as output and displayed on the radar indicator.
The situation of the display signal is visually determined, and the setting angles of the elevation scanning antenna 7 and the azimuth scanning antenna 8 are manually corrected so that the situation is as shown in FIG. 3b. For this reason, the precision approach radar 2
The disadvantage is that the operational burden on the operator becomes excessive.

An object of the present invention is to eliminate the above-mentioned drawbacks, and to detect the elevation angular position and azimuth angular position of an aircraft, etc., respectively through an elevation scanning antenna and an azimuth scanning antenna, and to detect the elevation angular position and azimuth angular position of an aircraft, etc., respectively, by referring to these angular positions. In addition, the setting angle of the azimuth scanning antenna is automatically corrected so that it is always at the appropriate angle.
An object of the present invention is to provide a radar system that reduces the operational burden on an operator.

The radar system of the present invention is a radar system equipped with an altitude scanning antenna and an azimuth scanning antenna for landing guidance of an aircraft, etc., and the radar system includes an altitude scanning antenna and an azimuth scanning antenna, and the altitude and angular position signals of the aircraft, etc. are transmitted through the altitude scanning antenna and the azimuth scanning antenna. angular position detection means for detecting an azimuth angle position signal; and a setting angle for automatically correcting the corresponding setting angles of the azimuth scanning antenna and the elevation scanning antenna by referring to the elevation angular position signal and the azimuth angle position signal. and a correction means.

Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 4 is a block diagram of an embodiment of the present invention, which includes an elevation scanning antenna 7, an azimuth scanning antenna 8, an elevation angular position detector 9, and an azimuth angular position detector 10. Means 15
, a setting angle correction means 16 including a height scanning antenna azimuth angle driver 11 and an azimuth scanning antenna height angle driver 12 , a receiver 13 , and an indicator 14 .

In FIG. 4, the reflected signal from the aircraft 1 output from the altitude scanning antenna 7 is input to the receiver 13, demodulated by the receiver 13, and input as a video signal to the altitude angle position detector 9. It is also input to the indicator 14 and displayed on the indicator. Further, the elevation angle signal outputted from the elevation scanning antenna 7 is input to the elevation angle position detector 9 and also to the indicator 14 at the same time to display the elevation scanning angle of the elevation scanning antenna. The elevation angle position detector 9 inputs the video signal and the elevation angle signal, refers to these two signals, generates an elevation angle position signal for the aircraft 1, and generates an elevation angle position signal for controlling the elevation angle setting of the azimuth scanning antenna 8. When the azimuth scanning antenna is sent to the height angle driver 12, the indicator 14
The altitude angle of the aircraft 1 corresponding to the azimuth scanning center line 8 is displayed numerically on the indicator 14.
In the azimuth scanning antenna elevation angle driver 12, the elevation angular position signal corresponding to the elevation angle of the aircraft 1 input from the elevation angular position detector 9 is used as a command signal, and the azimuth is slaved to the elevation angular position signal. The scanning antenna 8 is driven and controlled, and the height setting angle of the azimuth scanning antenna 8 is corrected to match the approach angle position of the aircraft 1.

Similarly, the reflected signal from the aircraft 1 outputted from the azimuth scanning antenna 8 is received and demodulated in the receiver 13, and the video signal outputted from the receiver 13 and the azimuth angle signal outputted from the azimuth scanning antenna 8 are converted into azimuth. It is input to the angular position detector 10 to generate an azimuth angle position signal corresponding to the approach angular position of the aircraft 1, and is sent to the elevation scanning antenna azimuth angle driver 11 to drive and control the elevation scanning antenna 7. The set angle in the azimuth of the antenna 7 is automatically corrected to match the approach angle position of the aircraft 1. Of course, the video signal and the azimuth angle position signal are input to the indicator 14, and the effects of displaying them on the indicator 14 are also controlled by the above-mentioned height scanning antenna 7.
This is exactly the same as the case described in which the reflected signal received in is input.

Therefore, when guiding the approach for landing of the aircraft 1, in the early stage of guiding the aircraft 1, the settings of the azimuth and elevation angles of the height scanning antenna 7 and the azimuth scanning antenna 8 are set in the precision approach radar at the initial stage of guiding the aircraft 1. Once the angle is initially set by manual control, the altitude scanning antenna 7 and the azimuth scanning antenna 8 will be automatically adjusted in accordance with the approach angle position of the aircraft 1 from then on due to the operation of the present invention described above. Each set angle is controlled and corrected to the optimum state, and the operational burden on the operator of the precision approach radar is significantly reduced. In addition, as mentioned above, the angular position of the aircraft 1 can be immediately determined by the indicator 1.
4, which allows the radar operator to accurately grasp the angular position of the aircraft 1 at all times.

As explained in detail above, the present invention provides a radar system equipped with an altitude scanning antenna and an azimuth scanning antenna for landing guidance of an aircraft, etc., in which the setting angle of each scanning antenna corresponds to the approach angle position of the aircraft, etc. By automatically controlling and correcting the information and displaying numerically the angular position of the aircraft, etc., there is an effect that the operational burden on the radar operator can be significantly reduced.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the operation of the precision approach radar, Figure 2 is an explanatory diagram of the operation of the altitude scanning antenna and azimuth scanning antenna of the precision approach radar, and Figure 3 is the scanning range of the altitude scanning beam and azimuth scanning beam and the aircraft. FIG. 4 is a block diagram of an embodiment of the present invention. In the figure, 1...Aircraft, 2...Precision approach radar, 3...Height and low scanning beam, 4...Azimuth scanning beam, 5, 6...Scan width, 7...Height and low scanning antenna, 8...Azimuth scanning Antenna, 9... Altitude angle position detector, 10... Azimuth angle position detector, 11...
Azimuth scanning antenna azimuth angle driver, 12... Azimuth scanning antenna elevation angle driver, 13... Receiver, 14...
Indicator, 15... Angle position detection means, 16... Setting angle correction means, 51, 52... Setting axis.

Claims (1)

[Scope of Claims] 1. In a radar system equipped with an altitude scanning antenna and an azimuth scanning antenna for landing guidance of an aircraft, etc., the altitude angular position signal and the azimuth angle position signal of the aircraft, etc. are transmitted via the altitude scanning antenna and the azimuth scanning antenna, respectively. angular position detection means for detecting an azimuth angle position signal; and a setting angle for automatically correcting the corresponding setting angles of the azimuth scanning antenna and the elevation scanning antenna by referring to the elevation angular position signal and the azimuth angle position signal. A radar method characterized by comprising a correction means. 2. In a radar system equipped with an altitude scanning antenna and an azimuth scanning antenna for landing guidance of an aircraft, etc., detecting an altitude angular position signal and an azimuth angular position signal of the aircraft, etc. via the altitude scanning antenna and azimuth scanning antenna, respectively. angular position detection means for automatically correcting the setting angles of the corresponding azimuth scanning antenna and the elevation scanning antenna by referring to the elevation angular position signal and the azimuth angle position signal; It is characterized by comprising an angle display means for inputting an elevation angle position signal and an azimuth angle position signal of the aircraft etc. detected by the position detection means and displaying an elevation angle and an azimuth angle corresponding to the respective angular position signals. radar method.