JPS61134686A - Answering device for identification of enemy and ally - Google Patents

Abstract

PURPOSE:To prevent the reception of an answer radio wave by an enemy by providing >=3 pieces of receiving antennas, >=3 pieces of receivers, a question decoder connected to each of these receivers and a receiving direction analyzer. CONSTITUTION:The answering device is provided with >=3 pieces of the receiving antennas 1a-1c of which the receiving directions are respectively different and which are so disposed as to permit the reception of the incoming ratio waves from the entire circumference, >=3 pieces of the receivers 2a-2c which detect the reception codes in accordance with the antennas 1a-1c, the question decoder 3 which extracts the question codes among the received codes and interpretes the contents of the questions and the receiving direction analyzer 6 which is connected to each of said receivers 2a-2c and measures the incoming direction of the received ratio waves. The answer radio wave by the assigned answer code transmitted by the selected transmitter is thus transmitted to the incoming direction of the question radio wave and the reception of the answer radio wave by the enemy is prevented.

Description

[Detailed Description of the Invention] [Field of Medical Use] This invention relates to a response device constituting a friend or foe identification system using a secondary V-da that performs interrogation and response using one wave. The response device transmits a response radio wave in the direction in which the interrogation radio wave transmitted by the interrogation device arrives.

[Conventional technology]

FIG. 3 is a block diagram showing an example of a conventional response device, in which radio waves arriving from all directions are received by a receiving antenna (+1) and input to a receiver (2) that detects a received code.

The received code detected by this receiver (2) is input to a question code decoder (3) which decodes the content of the question.

The interrogation code decoded by the interrogation code decoder (3) is then manually input to the transmitter (4). The transmitter (4) transmits a response code corresponding to the content of the interrogation code, and transmits it all around as a response radio wave from the transmitting antenna (5).

[Problems to be Solved by the Invention] With the conventional response device as described above, the response radio waves are transmitted all around the area, so the enemy can receive these response radio waves. There is a problem in that by transmitting an interrogation radio wave, the answering device can be caused to transmit a response radio wave of 1M.

This invention was made to solve this problem, and aims to prevent the enemy from receiving the response radio waves by transmitting the response radio waves only in the direction in which the interrogation radio waves arrive.

In addition to the above object, another invention of the present invention is to transmit a response radio wave only to an interrogation radio wave from an arbitrarily determined direction, thereby responding when an enemy's intentional interrogation radio wave is received. The purpose is to prevent money from transmitting radio waves.

[Means for solving problems]

Response regarding this invention! tIt has a function of measuring the direction of arrival of the interrogation radio wave and a function of transmitting a response radio wave in the direction of arrival of the interrogation radio wave, in addition to the conventional interrogation radio reception function and interrogation code deciphering function.

Moreover, a response device according to another invention of the present invention is as follows.

In the above configuration, the response radio wave is transmitted only when the arrival direction of the interrogation radio wave is within an arbitrarily determined direction.

[Effect]
1 In this invention, a response device transmits a response radio wave in the direction in which the interrogation radio wave arrives, thereby preventing the enemy from receiving the response radio wave.

Further, in another invention of the present invention, in addition to the above-mentioned function of transmitting a response radio wave in the direction in which the interrogation radio wave arrives, the response device is added with a function of transmitting a response radio wave only to the interrogation radio wave arriving from within an arbitrarily determined direction. This prevents the answering device from transmitting a response radio wave when it receives an interrogation radio wave intentionally transmitted by the enemy.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention, in which three or more receiving antennas (1&) are arranged so that the reception direction is different and it is possible to receive incoming radio waves from all around the circumference. (1C) and these three or more receiving antennas (
Three or more receivers (2a) to (1C) are connected one by one corresponding to each of 1a) to (1C) and detect received codes.
2c), a question code decoder (3) which is connected to each of the three or more receivers (2a) to (2c) and extracts a question code from the received code and deciphers the meaning of the question; A receiving direction analyzer (6) that is connected to each of the three or more receivers (2a) to (2C) and measures the arrival direction of received radio waves, this receiving direction analyzer I6), and the above-mentioned question code. A transmission controller (7) that specifies a response code corresponding to the interrogation code and a transmission direction of the response radio wave, which is connected to each of the decoders (3).

Compatible with three or more transmitters (4a) to (4C) that are each IM-connected to this transmission controller (7) and emit response radio waves, and these three or more transmitters (4a) to (4C). It is composed of three or more transmitting antennas (5a) to (5C) which are connected one by one and have different radio wave transmission directions and are capable of transmitting radio waves in arbitrary directions around the entire circumference.

In the response device configured as described above.

Three or more receiving antennas (1a) to (1C), three or more receivers (2a) to (2C), and an interrogation code decoder (31) can decode interrogation radio waves, and three or more receiving antennas (
Ia) to (1c) and three or more receivers (2a) to (2c)
) and the reception direction analyzer (3), it is possible to decode the interrogation radio wave and simultaneously measure the direction of arrival of the interrogation 'TIIL wave.

Based on the results of decoding these interrogation radio waves and the measurement of the direction of arrival of the interrogation radio waves, the transmission controller (7) selects one transmitter from the transmitters (4a) to (4C) of 31vA or higher. 2. Specify the response code to be transmitted by the selected transmitter.

The selected transmitter emits a signal. A response radio wave based on the designated response code is transmitted from the transmitting antenna in the direction of arrival of the interrogation radio wave.

FIG. 2 shows another embodiment in which a heading measuring device (8) is provided in addition to the configuration of the above embodiment, and this heading measuring device (8) is connected to the transmission controller (power) of the above embodiment. This shows that.

In the response device configured in this way, the direction of arrival of the interrogation radio wave can be measured in 6 directions based on the nose of the aircraft, and the direction that allows the transmission of the response radio wave can be set in the transmission controller (7). becomes possible.

〔Effect of the invention〕

89. This invention has been explained more than once. Question 11 to answering device
By adding a function that can measure the direction of arrival of the L wave and a function that can transmit a response radio wave in the direction of arrival of the measured interrogation radio wave, it is effective to prevent the enemy from receiving the response radio wave.

Moreover, another invention of this invention is the above-mentioned a! In addition to the function, with the addition of a setting function for a ten-man range that allows the transmission of response radio waves,
*It is possible to prevent the answering device from sending a response radio wave when it receives an intentionally sent question radio wave, and the answering device can send a response radio wave to the question radio wave intentionally sent by the enemy. It has the effect of preventing money.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one implementation tlJ of the present invention,
FIG. 2 is a plotter diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional response device. In the figure, (1) is a receiving antenna, and (2) is a receiver. (3) is the question code % firearm, (4) is the transmitter, (5) is the transmitting antenna, (6) is the receiving direction analyzer, (7) is the transmitting controller, and (8) is the heading measuring device. be. In addition, the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) Three or more receiving antennas, three or more receivers connected to each of these three or more receiving antennas, and one connected to each of these three or more receivers. a reception direction analyzer connected to each of the three or more receivers; a transmission controller connected to each of the reception direction analyzer and the interrogation code analyzer; , characterized by comprising three or more transmitters each connected to the transmission controller, and three or more transmitting antennas connected one each to correspond to the three or more transmitters. Friend or foe identification response device. (2) Three or more receiving antennas, three or more receivers connected to each of these three or more receiving antennas, and one connected to each of these three or more receivers. a reception direction analyzer connected to each of the three or more receivers; a transmission controller connected to each of the reception direction analyzer and the interrogation code analyzer; , three or more transmitters each connected to this transmission controller, three or more transmitting antennas connected one each to correspond to these three or more transmitters, and following the transmission controller. What is claimed is: 1. A response device for identifying friend or foe, comprising: a heading measuring device;