JP2605794B2 - Height measurement device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height measurement processing device, and more particularly to a height measurement processing device that suppresses the influence of a measurement error of a target measurement height data and calculates a smoothed height.

[Conventional technology]

Conventionally, smoothing altitude calculation in this type of altitude processing apparatus performs a process of calculating a new smoothing altitude by multiplying measured altitude data and already obtained smoothing altitudes by respective constant smoothing constants. I have.

FIG. 2 is a processing characteristic diagram showing an example of a conventional height measurement processing result. The measured altitude data indicated by black circles and the smoothed altitude data indicated by white circles are displayed in comparison.

[Problems to be solved by the invention]

The above-mentioned conventional smoothing altitude calculation in height measurement processing has a drawback that when there is a measurement altitude error in the measured altitude data during horizontal flight, the fluctuation of the smoothed altitude becomes large because it is a constant smoothing constant. There is.

[Means for solving the problem]

An apparatus according to the present invention is an altitude processing apparatus for performing altitude measurement processing of a target by radar, comprising: an altitude band calculating unit that obtains an estimated center altitude of an actual flight altitude from measured altitude data of the target; And a smoothed altitude calculation unit that performs weighted averaging by multiplying the weighted average by a constant altitude distribution constant.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of one embodiment of the present invention. The embodiment shown in FIG. 1 includes a radar device 1, a target data buffer 2, a tracking processor 3, an altitude band calculator 4, a center altitude extractor 5, a smoothed altitude calculator 6, an altitude band buffer 8, an altitude distribution constant. It comprises a buffer 9 and a data control unit 10, of which the altitude band calculation unit 4 and the smoothed height calculation unit 6 are the parts directly related to the present invention.

Next, the operation of the embodiment shown in FIG. 1 will be described. Target data (Ri, θi, Hi) obtained by the radar device 1 is supplied to a target data buffer 2.

The tracking processing unit 3 obtains target data (Ri, θi, Hi) from the target data buffer 2 and wake predicted position data (R _Pi-1 , θ _Pi-1 ) from the wake buffer 7 and performs tracking processing. The next wake predicted position data (R _Pi , θ _Pi ) is output to the wake buffer 7 and a horizontal flight judgment is performed on the measured altitude data (Hi). In the case of a horizontal flight, the measured altitude data (Hi) is used as an altitude band calculator. Output to 4. Maneuve
r) In the case of flight, the measured altitude data (Hi) is output to the wake buffer 7 as smoothed altitude data (H _Si ).

The altitude band calculation unit 4 receives the altitude band data (H _Bi ) from the altitude band buffer 8 and the measured altitude data (H _Bi ) from the tracking processing unit 3.
_i ) is input, the range of the altitude band containing the measured altitude data (H _i ) is calculated, and the altitude band data (H _Bi ) and the measured altitude data (H _i ) are sent to the center altitude extracting unit 5. Output.

The center altitude extracting unit 5 extracts altitude band data (H _Ci ) having the largest number of measured altitude data, and extracts the altitude band data (H _Ci ).
Is output to the smoothed altitude calculation unit 6 together with the measured altitude data (H _i ) as the center altitude of the actual flight altitude.

The smoothing height calculator 6 stores the height distribution constant α _k (maximum in H _Ci ) corresponding to the height band data (H _Ci or H _Bi ) obtained from the center height extractor 5 in the height distribution constant buffer 9.
, And calculates smoothed altitude data (H _Si ), and outputs the result to the wake buffer 7. The calculation of the smoothed height data (H _Si ) is performed based on the following equation.

Where H _kj : measured altitude data in the altitude band (k) α _k : altitude distribution constant in the altitude band (k) (α _k is the maximum value in the central altitude (H _Ci ) band) n: altitude Number of bands m _k : Number of measured altitude data in altitude band (k) FIG. 3 is a processing characteristic diagram showing an example of a result of height measurement processing according to the embodiment of FIG. It can be seen that the influence of the measured altitude data on the smoothed altitude is significantly suppressed as compared with the case of FIG.

The data control unit 10 receives the azimuth signal from the radar device 1 and sends processing timing data to each unit on the control line 10.
Output via.

〔The invention's effect〕

As described above, the present invention uses the smoothed altitude calculation which performs weighted averaging by the altitude distribution constant as compared with the conventional smoothed altitude calculation, thereby influencing the measured altitude data having a large measurement error on the smoothed altitude. And the effect of the measurement error can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of one embodiment of the present invention, FIG. 2 is a processing characteristic diagram showing an example of a conventional height measurement process result, and FIG. 3 is an example of a height measurement process result of the embodiment of FIG. It is a processing characteristic diagram shown. 1 ... radar device, 2 ... target data buffer, 3 ...
Tracking processing unit, 4 ... Altitude band calculation unit, 5 ... Center height extraction unit, 6 ... Smoothed height calculation unit, 7 ... Wake buffer, 8
... Altitude band buffer, 9 ... Altitude distribution constant buffer, 10
... Data control unit.

Claims (1)

(57) [Claims] An altitude processing unit for performing altitude processing of a target by radar, an altitude band calculating unit for obtaining an estimated center altitude of an actual flight altitude from measured altitude data of the target, And a smoothing altitude calculation unit for multiplying the altitude by a constant altitude distribution constant to perform a weighted average.