JPH08129059A - Communication alarm apparatus - Google Patents

Abstract

PURPOSE: To monitor, alarm and display whether or not the source of radio waves is a threat by loading an apparatus onto a moving body and receiving/ processing flying radio waves. CONSTITUTION: Every coming direction of radio waves received by a direction- searching antenna 1 is measured by a direction-searching/processing part 5, and sources of radio waves received from every direction by a monitoring antenna 2 are measured by an analyzing part 6 and stored while being related to the directions. The measured sources and known sources of radio waves are collated by a data-collating part 8 thereby identifying a threat target, and the threatening degree is judged by a threatening degree-judging part 9. The distance is schematically obtained by a distance-operating part 10. The threat target related to the directions is given to a data-processing part 12. The schematic distance and direction of the target are displayed at a display device 20. When the target is within an optional distance, a speaker 19 is sounded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warning device for detecting an approaching object and issuing an alarm, and in particular, it is mounted on a moving body such as an aircraft, a ship, a vehicle, etc. The present invention relates to a communication warning device that monitors whether or not it is a threat.

[0002]

2. Description of the Related Art Conventionally, a warning device for detecting an approaching object and issuing an alarm is often constructed by using a radar device having a transmitter and a receiver. That is, it is configured to radiate radio waves from a transmitter, receive and process reflected waves, measure the distance and direction to a target, detect an approaching object, and issue an alarm.

Conventionally, as this type of warning device, for example, those shown in FIGS. 5 and 6 are known. This is introduced in Japanese Patent Application Laid-Open No. 59-125084 as a radar proximity warning device, and FIG. 5 shows FIG.
FIG. 6 shows FIG. 4 of the publication with reference numerals in the 100s.

This radar proximity warning device radiates radar radio waves to a target and displays the reflected signal from the target by PPI. In the radar device, the target target is within a range where the set warning distance range and warning angle range match. It is a device that issues an alarm when it enters. According to the publication, the configuration shown in FIG. 5 may be basically used, but the configuration shown in FIG. 6 is added to prohibit an alarm due to a reflected wave other than a target target such as land.
The details of the operation will be described with reference to the publication, and the operation outline of FIG. 6 will be described.

In FIG. 6, a gate signal indicating the angle range set by the alarm angle setting unit 159 is generated, and an alarm signal is generated only in a portion that matches the range set by the alarm distance setting unit 141. The angle range that can be set by the setting unit 159 is 90 degrees to 270 degrees, 45 degrees to 315 degrees,
When limited to four types of 0 degree to 180 degrees and 180 degrees to 0 degree, the clock supplied to the angle counter 133 is supplied to the angle clock generator 161, and every 1 degree, every 2 degrees, every 3 degrees, 4 degrees. Generates a clock for each.

For example, in the case of prohibiting 90 degrees to 270 degrees, the angle clock every 2 degrees is given to the terminal 163,
At an angle of 90 degrees from the azimuth reference signal to the display 128, an inhibition signal is generated from the inhibition gate generation circuit 168, and the inhibition gate 172 is inhibited from passing between 90 degrees and 270 degrees. As a result, warning by reflected waves from other than the target such as land is prohibited.

[0007]

By the way, as a method of monitoring or warning, not only the measurement of the direction and distance of the target object but also the fact that it is a threat can be identified and the degree of threat can be determined. Appropriate measures may be required.

However, in the method utilizing the principle of the conventional radar system, it is premised that the target object reflects the radar radio wave, but recently, the target object which is difficult to detect by the radar radio wave has also appeared. . In addition, in order to identify whether the target object is a threat, it is necessary to grasp the characteristics and capabilities of the target object, but the radar method can detect and track the direction and distance of the target object, and It is not possible to grasp the characteristics and abilities of. Furthermore, the radar system lacks confidentiality.

Therefore, even a target object that is difficult to detect with radar radio waves can be detected as long as it is a radio wave source, and the characteristics and capabilities of the radio wave source can be detected to identify whether it is a threat or not, and an alarm is issued. It is desired to develop a communication warning device that can take appropriate measures such as issuing a warning. In the case of a target object that is difficult to detect with radar radio waves, the radio wave radiation may be minimized to act in a quiet manner, and weak radio waves may come in while performing cooperative communication with each other. It is possible to quickly analyze the behavior of the above and alert the operators of their own camp.

An object of the present invention is to provide a communication warning device mounted on a mobile body and capable of monitoring whether or not the radio wave source poses a threat by receiving processing of flying radio waves.

[0011]

In order to achieve the above object, the communication warning device of the present invention has the following configuration. That is, the communication alert device of the first invention is a communication alert device that is mounted on a mobile body and monitors whether or not the radio wave source is a threat by the reception processing of the flying radio waves; At least four direction finding antennas arranged to receive signal waves from all directions; means for measuring the direction of arrival of signal waves received by the direction finding antenna; and receiving signal waves from all directions At least two monitoring antennas that are arranged as necessary; a means for measuring radio wave parameters (frequency, radio wave format, signal strength, reception level, etc.) of the signal wave received by the monitoring antenna; And a means for associating and accumulating radio wave specifications; a means for identifying whether an incoming signal wave is a target threat signal wave or a non-target signal wave by collating the prepared radio wave parameter with the measured radio wave parameter And; identified Characterized in that it comprises: means for determining the threat level in response to the signal intensity of the threat signal waves.

A communication alerting device according to a second aspect of the present invention comprises means for calculating an approximate distance to a radio wave source in the first aspect of the invention, using at least radio wave data measured with respect to a threat signal wave having a determined degree of threat. Means for displaying the approximate distance and direction to the radio wave source on the display screen of the display unit;

In the communication alerting apparatus of the third invention, in the second invention, a concentric circle corresponding to each distance centering on the self position is displayed on the display screen of the display, and the concentric circle of an arbitrary distance is used to set the alarm area. Means for displaying the indicated range marker;

Further, the communication warning device of the fourth invention is characterized in that, in the third invention, it further comprises means for issuing an alarm when a threat signal wave is within the range of the range marker display.

[0015]

Next, the operation of the communication warning device of the present invention constructed as above will be described. In the present invention, the direction of the incoming radio wave is measured, and the radio wave specifications of the signal wave are grasped by analyzing the received signal wave, and it is determined from the radio wave specifications whether the radio wave source poses a threat. The approximate distance and direction can be displayed, and an alarm can be issued when the threat radio wave source enters within an arbitrary distance.

Therefore, as long as the target object is a radio wave radiation source, the approaching radio wave source is instantly detected, analyzed and identified, the direction and approximate distance of the threat signal wave are known, and the presence of the approaching threat signal wave is detected. Along with the display, the passenger of the moving body can be notified by an alarm.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a communication warning device according to an embodiment of the present invention. In FIG. 1, the direction finding antenna 1 and the monitoring antenna 2 are omnidirectional blade antennas.
It is arranged at an appropriate position around the outside of the moving body so as to receive signal waves from all directions of 60 degrees. Here, the moving body is any one of an aircraft, a ship, and a vehicle.

The signal received by the direction-finding antenna 1 is received by the direction-finding receiving section 3 and then enters the direction-finding processing section 5.
The direction search processing unit 5 obtains one azimuth of an incoming radio wave from the phase difference between the two antennas as one set. Therefore,
At least four direction-finding antennas 1 are required to cover all directions. The azimuth accuracy in this measurement method is 1
It is 0 degrees or less.

On the other hand, the signal received by the monitoring antenna 2 is processed by the monitoring receiving section 4 and then enters the analysis processing section 6. The monitoring antenna 2 is intended to receive a weak signal wave within a range of 360 degrees, but the mounting position differs depending on the moving body. For example, in an aircraft, for example, the upper one
There are three, one for the lower part and one for the aft tail, and one is required for each side of the ship. Therefore, at least two monitoring antennas 2 are required.

The analysis processing unit 6 analyzes the signal input from the monitoring reception unit 4, and analyzes various radio waves such as the frequency, radio wave format (modulation format), signal strength, and reception level of the signal wave received by the monitoring antenna 2. The element is measured and stored, for example, as shown in FIG. 2, in association with the radio wave specification and the direction data input from the direction search processing unit 5 at each time.

In the identification data table 7, the radio wave data of all known moving bodies of the enemy and the friendly army are stored in advance. The data collation unit 8 collates the radio wave data taken in from the analysis processing unit 6 with the radio wave data taken in from the identification data table 7, identifies the enemy or the friendly army, and confirms the signal wave of the enemy. The signal wave that cannot be compared with is treated as a threat signal wave, and those radio wave parameters are given to the threat degree determination unit 9.

The threat level determination unit 9 determines the order of threats of the target signal by using the signal strength of the input threat signal wave,
The determination result is given to the distance calculation unit 10 and the data processing unit 12. The reason why the threat level of the target signal is determined by using the signal strength is to deal with an enemy approaching from a distance.
It may be too late at short distances.

The distance calculation unit 10 calculates the approximate distance of the target in the following manner and gives the result to the data processing unit 12. That is, for each threat target input from the threat degree determination unit 9, the analysis processing unit 6 analyzes the analysis data regarding one threat target.
Antenna gain G _{0 of} the communication guard device,
The radio wave specification data measured by the analysis processing unit 6 is averaged in consideration of the wavelength λ, and the averaged data is inserted into Expression 1 to obtain the distance R.

[0024]

[Equation 1]

In Equation 1, P _T is the transmission power of the target wave, G _T is the antenna gain of the target wave, and P _r is the reception level, where P _T × G _T = signal strength, G _T + G ₀
Is expressed as an antenna gain, Expression 1 can be expressed as Expression 2.

[0026]

[Equation 2]

The data processing section 12 mainly performs the following two processes. First, regarding the threat target input from the threat level determination unit 9, when there is a signal wave determined to have a high threat level, a command is sent to the sound generation unit 13 to cause the speaker 1
Ring 9 and issue an alarm. When there are a plurality of signal waves having a high threat level, the speaker 19 is driven to ring continuously for a time corresponding to the number of the signal waves or intermittently at predetermined time intervals.

Further, the data processing unit 12 symbolizes the target signal waves in descending order of threat in order to determine the approaching target signal waves under the congested radio wave environment on the display 20.
For example, alphanumeric. Specifically, in the data processing unit 12, using the alphanumeric characters input from the character signal generation unit 11,
The radio waves of the enemy are, for example, A ₁ , A ₂ , ..., The unknown radio waves are converted into alphanumeric characters in the order of, for example, N ₁ , N ₂ ,.

As a result, the threat signal wave is displayed on the display 20 at a predetermined distance position with predetermined alphanumeric characters. By listening to the warning sound and looking at the display, the azimuth and the distance of the threat signal wave (enemy etc.) are known, so that appropriate measures can be taken promptly.

Next, in the display generation unit 14, as shown in FIG. 3, concentric circles corresponding to respective distances centering on the self position are displayed on the display screen of the display 20, and the concentric circles at arbitrary distances are used. A process of displaying a range marker indicating a caution area is performed.

Specifically, the pulse signal from the pulse generating section 15 is measured by the pulse counter measuring section 16, the distance is calibrated by the distance calibrating section 17, and given to the range marker generating section 18 to correspond to each distance. Generate a range marker. As a result, the display generation unit 14 can display concentric circles corresponding to each distance centered on its own position on the display screen of the display 20 (FIG. 3 (2)), and can also display a threat signal wave in superimposition thereof (FIG. 3). 3 (1)).

Then, the distance data calculated by the distance calibration unit 17 is supplied to the data processing unit 12 in order to control the range in which the alarm sound is generated according to the distance. Thereby, the display generation unit 14 can display the range marker indicating the caution area by using the concentric circles within the distance range specified by the data processing unit 12 (FIG. 3 (3)). The data processing unit 12 generates an alarm sound when there is a threat signal wave in the distance range thus determined.

The communication warning device of the present invention can be used, for example, by connecting it to an existing radar device as shown in FIG. That is, the functions of the distance calibrating unit 17 and the range marker generating unit 18 shown in FIG. 1 are realized by using the clock generator 32 and the range gate signal generator 31 of the existing radar device, and the display unit 30 also displays them. It is displayed.

In order to operate the communication warning device and the radar device in cooperation with each other, a transmission pre-trigger generator 33 for generating a start signal of the transmission operation of the radar device is used, and the distributor is used at the timing when the radar device is operating. The switches 35 and 36 are turned off via the switch 34 so that the received waves are not input to the direction search receiving unit 3 and the monitoring receiving unit 4, thereby enabling interoperability. This makes it possible to effectively use both features.

[0035]

As described above, the communication guard apparatus of the present invention measures the direction of an incoming radio wave, grasps the radio wave specifications of the received signal wave by analyzing the received signal wave, and determines the radio wave specification from the radio wave specification. It is possible to determine whether the radio wave source poses a threat, display the approximate distance and direction of the threat radio wave source, and issue an alarm when the threat radio wave source enters within an arbitrary distance. Therefore, as long as the target object is a radio wave radiation source, the approaching radio wave source is instantly detected, analyzed and identified, the direction and approximate distance of the threat signal wave are known, and the presence of the approaching threat signal wave is displayed. There is an effect that a passenger of a moving body can be notified by an alarm.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a communication alerting device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a processing result of an analysis processing unit.

FIG. 3 shows a display example in the communication warning device of the present invention,
(1) is a target display example, (2) is a distance display example, and (3) is a display example of an alarm sound prohibited area.

FIG. 4 is a configuration block diagram of a communication warning device according to another embodiment of the present invention.

FIG. 5 is a configuration block diagram of a conventional radar proximity warning device.

6 is a configuration block diagram of a main part of the radar proximity warning device shown in FIG.

[Explanation of Codes] 1 Antenna for Direction Detecting 2 Antenna for Monitoring 3 Directional Receiving Section 4 Monitoring Receiving Section 5 Directional Search Processing Section 6 Analysis Processing Section 7 Identification Data Table 8 Data Matching Section 9 Threat Determining Section 10 Distance Computing Section 11 Character signal generation unit 12 Data processing unit 13 Voice generation unit 14 Display generation unit 15 Pulse generation unit 16 Pulse counter measurement unit 17 Distance calibration unit 18 Range marker generation unit 19 Speaker 20, 30 Display unit 31 Range gate signal generator 32 Clock generation Device 33 Transmission pre-trigger generator 34 Distributor 35 Switch 36 Switch

Claims (4)

[Claims] 1. A communication warning device mounted on a mobile body for monitoring whether or not the radio wave source poses a threat by receiving processing of flying radio waves; the communication warning device is a signal wave from all directions. At least four direction finding antennas arranged to receive the signal; means for measuring the arrival direction of the signal wave received by the direction finding antenna; and at least arranged to receive the signal waves from all directions. Two monitoring antennas; a means for measuring the radio wave parameters (frequency, radio wave format, signal strength, reception level, etc.) of the signal wave received by the monitoring antenna; and the measured arrival direction and radio wave parameters. Means for associating and accumulating; means for discriminating whether the incoming signal wave is a target threat signal wave or a non-target signal wave by comparing the prepared radio wave parameters with the measured radio wave parameters; and the identified threat Signal wave Communication alert device, characterized in that it comprises: means for determining the threat level in response to the signal strength Te. 2. A means for calculating an approximate distance to a radio wave source by using radio wave data measured for at least a threat signal wave whose degree of threat is judged; and a rough distance to the radio wave source on a display screen of a display. And a means for displaying the azimuth; and the communication alert device according to claim 1, further comprising: 3. A means for displaying a concentric circle corresponding to each distance centered on its own position on a display screen of a display device, and displaying a range marker indicating a caution area using the concentric circle of an arbitrary distance;
The communication alert device according to claim 2, further comprising: 4. The communication warning device according to claim 3, further comprising means for issuing an alarm when there is a threat signal wave within the range of the range marker display.