JPH0436677A - Direction finder - Google Patents

Abstract

PURPOSE:To attain miniaturization and the simplification of an operation with simple constitution by generating the direction finding signals of a reception wave based on a rotary beam and a fixed beam, respectively by first and second signal processing means. CONSTITUTION:Plural antennas 10a arranged on the circumference of a radio wave reception part 10 with prescribed interval receive arriving waves. To the output terminal of the reception part 10, a rotary beam forming part 11 and a fixed beam forming part 15 in accordance with a continuous wave and a discontinuous wave in interference are connected, respectively. Respective beam is converted to an intermediate frequency signal, respectively at first and second intermediate frequency signal generating parts 12, 16, and the direction finding signals are generated at first and second direction finding signal generating parts 13, 17, respectively, and they are selected corresponding to the wave by the signal of a control part by a switch 14, and either the signals is displayed on a display part 18. Thereby, it is possible to eliminate interference, and to attain the miniaturization by simplifying the reception part 10 and the display part 18, and to improve the handling of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an azimuth measuring device that receives incoming radio waves and measures the azimuth of the radio waves.

(Prior Art) In general, this type of direction measuring device is required to have a function of removing signals of all radio wave formats and interference, so a direction measuring system of at least two stations is combined as a set. ing.

Figure 3 shows such a conventional direction measuring device.
A first radio wave receiver 1 that can handle continuous wave radio signals and interference, and a second radio wave receiver 2 that can handle non-continuous wave radio signals such as SSB and Morse. Arranged in combination.

In each of the first and second radio wave receiving sections 1.2, a plurality of antennas la and 2a are arranged at predetermined intervals on the circumference. Of these, the first radio wave receiving section 1 is connected to a rotating beam forming section 3a. The rotating beam forming section 3a combines the input beams to form a rotating beam, and outputs the rotating beam to the first intermediate frequency signal main forming section 4a. The first intermediate frequency signal generating section 4a generates a first intermediate frequency signal based on the input rotating beam and outputs it to the first direction finding signal main generating section 5a. The first direction finding signal generation section 5a generates a first direction finding signal for filial piety from the inputted first intermediate frequency signal and outputs it to the first display section 6a, where a continuous wave signal is displayed. The radio wave signal and the direction of the radio wave at the time of interference are displayed on the first display section 6a.

On the other hand, a fixed beam forming section 3b is connected to the second radio wave receiving section 2. The fixed beam forming section 3b combines the input beams to form a fixed beam, and outputs the fixed beam to the second intermediate frequency signal converting section 4b. The second intermediate frequency signal converter 4b converts the input rotating beam into a second intermediate frequency signal and outputs it to the second direction finding signal generator 5b. The second direction finding signal generating section 5b generates a direction finding signal for display from the input intermediate frequency signal and outputs it to the second display section 6b. Display section 6
b.

However, in the above-mentioned direction measuring device, the first and second radio wave receiving sections 1.2 and the first and second
If the display parts 6a and 6b of
The problem was that it was extremely large. Further, according to this, it is difficult to perform highly accurate monitoring unless a monitoring operator is provided for each of the first and second display sections 6a and 6b, which makes handling and operation troublesome. It had

(Problems to be Solved by the Invention) As described above, the conventional direction measuring device has the problems of being large and cumbersome to handle.

This invention has been made in view of the above circumstances, and aims to provide an azimuth measuring device that can be simplified in structure, downsized, and simplified in handling operations. .

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a radio wave receiving means for receiving radio waves arriving at a plurality of antennas arranged at predetermined intervals on the circumference, a first signal processing means for beam-combining the outputs of the plurality of antennas of the means to form a rotating beam and converting it into an intermediate frequency signal, and generating a direction finding signal based on the intermediate frequency signal; and the radio wave receiving means. A second beam combines the outputs of multiple antennas to form a fixed beam and converts it into an intermediate frequency signal, and generates a direction finding signal based on this intermediate frequency signal.
a signal processing means, a selection means for selecting either the output of the first display waveform conversion means or the second display waveform conversion means, and a signal processing means for selecting the output of the first display waveform conversion means or the second display waveform conversion means;
Alternatively, the display device may include display means for displaying the output of the second display waveform conversion means.

(Function) According to the above configuration, the radio waves received by the radio wave receiving means are
The first signal processing means generates a direction finding signal based on the rotating beam, and the second signal processing means generates a direction finding signal based on the fixed beam. Then, one of the direction finding signals generated by the first and second signal processing means is selected via the selection means and displayed on the display stage. As a result, in addition to eliminating interference,
It becomes possible to handle continuous wave and non-continuous wave radio wave signals.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a direction measuring device according to an embodiment of the present invention, in which a plurality of antennas 10a are arranged at predetermined intervals on the circumference of a radio wave receiving section 10. A rotating beam forming section 11 is connected to the output end of the radio wave receiving section 10 to deal with continuous wave radio waves and interference, and a first intermediate frequency signal generating section is connected to the output end of the rotating beam forming section 11. 1
2 is connected. A first direction finding signal generating section 13 is connected to the output end of the first intermediate frequency signal generating section 12.
The output end of the direction search signal generating section 13 is connected to the fixed contact a of the Swiss-Sochi 14.

Further, a fixed beam forming section 15 for dealing with discontinuous radio waves is connected to the output end of the radio wave receiving section 10, and a second intermediate frequency signal generating section is connected to the output end of the fixed beam forming section 15. 16 are connected.

A second direction-finding signal generation section 17 is connected to the output end of the second intermediate frequency signal generation section 16, and the output end of the second direction-finding signal generation section 17 is connected to the fixed contact of the switch 14. Ru. A display section 18 is connected to a movable contact C of the switch 14, and the movable contact C is time-divisionally controlled in response to a control signal from a control section (not shown).

With the above configuration, the radio waves arriving at the radio wave receiving section 10 are guided to the rotating beam forming section 11 and also to the fixed beam forming section 15. Of these, the rotating beam forming section 11 beam-combines the input outputs of the radio wave receiving section 10 to form a rotating beam, and outputs the rotating beam to the first intermediate frequency signal generating section 12 .

The first intermediate frequency signal generation section 12 generates a first intermediate frequency signal from the input rotating beam and outputs it to the first direction finding signal generation section 13 . The first direction finding signal generation unit 13 generates a first direction finding signal for displaying on a cathode ray tube, for example, based on the first intermediate frequency signal, and connects the fixed contact a of the switch 14.
Output to.

On the other hand, the fixed beam forming section 15 receives the input radio wave from the receiving section 10.
The outputs of the fixed beams are beam-combined to form a fixed beam, and the fixed beam is output to the second intermediate frequency signal generation section 16.

The second intermediate frequency signal generation section 16 generates a second intermediate frequency signal from the input fixed beam and outputs it to the second direction finding signal generation section 17 . The second direction search signal generating section 17 generates a second direction signal for display on a cathode ray tube, for example, based on the second intermediate frequency signal, and outputs it to the fixed contact of the switch 14. At this time, a control signal from the control section (not shown) is input to the control signal input terminal of the switch 14, and in response to this control signal, the movable contact C is selectively switched under time-sharing control. controlled. As a result, the switch 14 outputs either the inputted first direction finding signal or the second direction finding signal to the display section 18, and here the first direction finding signal corresponding to the continuous wave radio wave or the input direction finding signal is displayed on the display section 18. Either one of the second direction finding signals corresponding to the discontinuous radio waves is selectively displayed.

In this way, the above-mentioned direction measuring device extracts a rotating beam corresponding to a continuous wave radio wave and a fixed beam corresponding to a discontinuous wave radio wave from the radio waves received by the radio wave receiving unit 10, and rotates and fixes these beams. First and second direction search signals corresponding to the beams are generated, and one of the first and second direction search signals is displayed on the display section. As a result, in an azimuth measurement system capable of eliminating interference and responding to signals in continuous wave and non-continuous wave formats, the radio wave receiving unit 10 and display unit 18 are improved compared to conventional systems. By simplifying the configuration, miniaturization can be promoted. Further, according to this, since the number of display sections 18 is reduced to one, the number of monitoring operators can be reduced, and the handling efficiency can also be improved.

In the above embodiment, the case where the switch is configured to be controlled in a time-sharing manner has been described, but the present invention is not limited to this, and it is also possible to configure the switch to be controlled in other ways, for example, in a manual manner.

Furthermore, the present invention is not limited to the above-mentioned embodiments, and, for example, as shown in FIG.
．． 17 and the fixed contacts a and b of the switch 14.
and a second waveform setting section 19° 20 are provided, and the first and second waveform setting sections 19° 20 can vary the waveform shapes of the first and second direction finding signals, and set the colors variably. It is also possible to display the displayed information on the display unit 18. According to this, in the display section 18, the first
This makes it easier to identify the second direction-finding signal, prevents erroneous monitoring by the operator, and is expected to produce even more effective effects.

Further, in the above embodiment, the configuration of the - group was explained as a representative, but the configuration is not limited to this, and it is also possible to configure a plurality of groups.

Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide an azimuth measuring device that has a simple configuration, can be made compact, and can be handled easily. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a direction measuring device according to an embodiment of the present invention, FIG. 2 is a block diagram showing main parts of another embodiment of the present invention, and FIG. 3 is a conventional direction measuring device. FIG. 10...Radio wave receiving unit, 11...Rotating beam forming unit,
12.16...first and second intermediate frequency signal generation units,
13.17...first and second direction finding signal generation units, 14
...Switch, 15...Fixed beam forming section, 18.
. . . Display section, 19.20 . . . First and second waveform setting sections. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A radio wave receiving means for receiving incoming radio waves using a plurality of antennas arranged at predetermined intervals on a circumference, and beam combining the outputs of the plurality of antennas of the radio wave receiving means. a first signal processing means for forming a rotating beam and converting it into an intermediate frequency signal, and generating a direction finding signal based on the intermediate frequency signal; and a fixed beam combining the outputs of the plurality of antennas of the radio wave receiving means. a second signal processing means for forming a beam and converting it into an intermediate frequency signal, and generating a direction finding signal based on the intermediate frequency signal; and the first display waveform converting means or the second display waveform converting means. An azimuth measuring device comprising: a selection means for selecting one of the outputs; and a display means for displaying the output of the first or second display waveform conversion means selected by the selection means.