JP2723869B2 - Underwater vehicle detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater vehicle detection device used as a simulated underwater target in a navigation performance test of an underwater vehicle, and more particularly to an underwater vehicle that emits an ultrasonic pulse and approaches an underwater vehicle. The present invention relates to an underwater vehicle detection device that detects an approaching state of a vehicle.

[0002]

2. Description of the Related Art FIG. 2 is a diagram showing an example of the outer shape of this type of underwater vehicle detection device, and FIG. 3 is a block diagram showing an example of a conventional underwater vehicle detection device. The underwater vehicle itself sends out ultrasonic pulses at predetermined intervals,
It is designed to receive reflected sound waves from underwater targets and sail toward the underwater targets. Further, within a predetermined distance from the underwater target, the period of the ultrasonic pulse changes according to the approach distance.

According to FIG. 2, a buoy 1 floating on the water surface,
The buoy 1 includes a receiver 2 and a transmitter 3 suspended from the bottom of the buoy 1 by a cable 4 and a weight 5 in water, and a radio wave reflecting corner reflector 6 provided on the buoy 1. Here, the wave receiver 2 converts underwater sound waves into electric signals, and the wave transmitter 3 converts electric signals into sound waves and transmits the sound waves underwater. The corner reflector 6 reflects radar radio waves to determine the position of the apparatus.

[0004] Inside the buoy 1, a circuit for amplifying an electric signal from the receiver 2 and transmitting the amplified signal to the transmitter 3 is housed. That is, as shown in FIG. 3, a preamplifier 11 for amplifying a reception signal S1 from the receiver 2 and outputting the amplified signal as a signal S2, and a signal S2 for receiving a local oscillation signal from an oscillator 13
The frequency converter 12 converts the frequency of the signal S3 and outputs the signal S3, the power amplifier 14 power-amplifies the signal S3 and outputs it to the transmitter 3 as the transmission signal S4, and the power amplifier 14 is destroyed by detecting the occurrence of howling. A howling detector 15 for protecting the signal S3 from being recorded and a recorder 1 for recording the signal S3.
6 and a recording controller 17 for controlling the recording device 16.

[0005] By the start of the test, the underwater vehicle starts navigating toward the underwater target while transmitting ultrasonic pulses. On the other hand, the underwater vehicle detection device receives the ultrasonic pulse transmitted by the underwater vehicle in the receiver 2 and converts it into a reception signal S1. After being converted and further power-amplified by the power amplifier 14, it is returned from the transmitter 3 as reflected sound waves and transmitted underwater. Therefore, the underwater vehicle travels by receiving the sound waves transmitted from the transmitter 3 as reflected sound waves from the underwater target.

Incidentally, howling detector 15 monitors whether signal S3 is a pulse signal or a continuous signal,
The control signal C4 is transmitted upon detecting the change to the continuous signal, thereby preventing the power amplifier 14 from being overloaded due to howling. Further, the recording controller 17 constantly monitors the level of the signal S3, and sends out a recording control signal C3 so that the recording device 16 records the signal S3 when the sound pressure level is equal to or higher than a predetermined value.

After completion of the test, the apparatus is recovered, the signal recorded in the recorder 16 is reproduced, and the approach status of the underwater vehicle is analyzed to determine the test result.

[0008]

In the conventional underwater vehicle detection device described above, the device is recovered after the test is completed, and the approach status of the underwater vehicle to the underwater target is determined based on the signal recorded in the recorder. We analyze and judge the test results. For this reason,
There is a problem that it takes time and becomes slow until the test result is found. In order to solve such problems, there is a means for transmitting a signal to be recorded in a recorder by radio waves and monitoring the signal. However, in this case, not only the radio transmitter and the transmission antenna are required on the underwater vehicle detection device side, but also the reception antenna and the radio receiver are required on the monitoring station side. Therefore, there is a disadvantage that the apparatus becomes expensive and the underwater vehicle detection device becomes large.

It is an object of the present invention to provide an underwater vehicle detection apparatus which can inform the user of the state of approach to an underwater target over a wide area easily and inexpensively when testing the underwater vehicle.

[0010]

An underwater vehicle detection apparatus according to the present invention is laid as a pseudo underwater target of an underwater vehicle approaching an underwater target by emitting an ultrasonic pulse to approach the underwater vehicle. An underwater vehicle detection device that detects a situation, wherein the underwater vehicle detects the approach of the underwater vehicle to a predetermined distance by receiving the ultrasonic pulse and outputs an approach detection signal, Notification means for receiving the approach detection signal and notifying the user of the approach by visual or auditory perception. Further, the approach detecting means may be configured to detect an approach state of the underwater vehicle by detecting a cycle of the ultrasonic pulse. Further, the notifying means includes:
The notification may be made by light, smoke, sound, or the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and the same components as those in the conventional example shown in FIG. 2 are denoted by the same reference numerals. Here, the difference from the conventional example is that the proximity detector 18 and the light emission controller 19 are provided in the buoy 1, and the light emitter 20 is provided above the buoy 1.

In FIG. 1, a receiver 2 converts an ultrasonic pulse transmitted by an underwater vehicle into an electric signal, and receives a received signal S1.
Output as The preamplifier 11 amplifies the received signal S1 and outputs it as a signal S2. The frequency converter 12
Upon receiving the local oscillation signal from the oscillator 13, the frequency of the signal S2 is converted and output as a signal S3. Power amplifier 14
Power-amplifies the signal S3 and outputs it to the transmitter 3 as a transmission signal S4. The transmitter 3 converts the transmission signal S4 into a sound wave and transmits the sound wave into the water. The howling detector 15 detects when the howling has occurred and sends out a control signal C4.
The power amplifier 14 is protected from being destroyed. The recording device 16 records the signal S3 under the control of the recording control signal C3 from the recording controller 17.

The approach detector 18 monitors the period of the ultrasonic pulse sent by the underwater vehicle based on the signal S2, and sends an approach detection signal C1 when the underwater vehicle approaches a predetermined distance. I do. Further, the light emission controller 19 receives the approach detection signal C1 from the approach detector 18 and the recording controller 1.
The light emission control signal C 2 is generated in response to the recording control signal C 3 from the controller 7, and sent to the light emitter 20. The light emitter 20 has a plurality of high-intensity lamps having different emission colors, and has a light emission control signal C2.
The high-intensity lamp blinks according to.

Next, the operation will be described.

In the test of the underwater vehicle, the underwater vehicle detection device is suspended at a target position underwater.

By starting the test, the underwater vehicle starts navigating toward the underwater target while transmitting ultrasonic pulses. Thereafter, when the underwater vehicle smoothly sails and approaches a predetermined distance, the approach detector 18 detects this and sends an approach detection signal C 1 to the light emission controller 19.

When the recording control signal C3 sets the recording device 16 in the recording state, the light emission controller 19 blinks, for example, the red lamp of the light emitting device 20, and outputs the approach detection signal C
When receiving 1, that is, when the underwater vehicle approaches a predetermined distance, for example, it transmits a light emission control signal C2 to the light emitter 20 so as to blink a daylight lamp. Therefore, it is possible to know the approaching state of the underwater vehicle to the underwater target only by monitoring the light emitting lamp at the monitoring station remote from the underwater vehicle detection device.

It should be noted that the color of the light emitting lamp, the blinking cycle, and the like are set so that identification from a distant place is easy. It is apparent that the same effect can be obtained by replacing the light emitting device with a device that emits or emits smoke.

[0020]

As described above, according to the present invention, the approach distance of an underwater vehicle approaching an underwater target by emitting an ultrasonic pulse is detected based on the period of the ultrasonic pulse, and the underwater vehicle can be detected. When approaching a predetermined distance, it emits light, smoke, sound, etc. that can be identified by human vision or hearing, and notifies the user of the situation. Can inform

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of an outer shape of the underwater vehicle detection device.

FIG. 3 is a block diagram showing an example of a conventional underwater vehicle detection device.

[Explanation of symbols]

 18 Proximity detector 19 Light emission controller 20 Light emitter C1 Approach detection signal C2 Light emission control signal C3 Recording control signal S1 Received signal S4 Transmission signal

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriyoshi Arai 5-15-5 Nishi-Shinjuku, Shinjuku-ku, Tokyo Japan Electric Radio Equipment Engineering Co., Ltd. In-house (72) Inventor Hideki Ogawa 5-15-5 Nishi-Shinjuku, Shinjuku-ku, Tokyo In-house Japan Electrical and Radio Equipment Engineering Co., Ltd. 58-89491 (JP, A) JP-A-4-328483 (JP, A) JP-A-5-297101 (JP, A) JP-A-7-110199 (JP, A) JP-A-5-33076 (JP, A) U)

Claims (3)

(57) [Claims] 1. An underwater vehicle detection device that is laid as a pseudo underwater target of an underwater vehicle approaching an underwater target by emitting an ultrasonic pulse and detects an approaching state of the underwater vehicle, Proximity detection means for receiving an ultrasonic pulse, detecting that the underwater vehicle has approached a predetermined distance, and outputting an approach detection signal, and receiving the approach detection signal so as to be distinguishable by visual or auditory sense of a person. And a notifying means for notifying the underwater vehicle. 2. The underwater vehicle detection device according to claim 1, wherein the approach detection means detects an approach state of the underwater vehicle by detecting a cycle of the ultrasonic pulse. 3. The underwater vehicle body detection device according to claim 1, wherein the notification unit performs notification by light, smoke, sound, or the like.