JP2851874B2 - Ultrasonic underwater wireless communication device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ultrasonic underwater radio communication device.

[Related Art] Conventionally, as a communication device used by divers, a device having an ultrasonic transducer main body, a microphone, and a speaker as separate bodies has been used. In this communication device,
The microphone is installed in a dedicated full-face mask that covers the entire face of the diver.

[Problems to be Solved by the Invention] However, the conventional technology has the following problems.

The ultrasonic transducer body, the microphone, and the speaker are separate. For this reason, the cables connecting them to each other are routed around the diver, which may cause inconvenience to the diver's operation.

In order to collect the sound of a diver with a microphone, it is necessary to install the microphone in a full face mask, take out the cable connected to this microphone from the mask, and route it to the side of the ultrasonic transducer body . For this reason, there is a possibility that the movement of the diver deforms the mask via the cable connected to the microphone, causing inconvenience such as inflow of water into the mask.

The present invention does not inconvenience the movement of the diver,
The purpose is to ensure reliable underwater wireless communication.

An object of the present invention is to provide more reliable underwater wireless communication in a state in which water does not flow into a mask worn at least in front of a diver's mouth.

[Means for Solving the Problems] An ultrasonic underwater radio communication device according to the present invention according to claim 1, has a water pressure resistant case mounted on the side of a face, and an ultrasonic wave transmitting / receiving electronic device is provided in the case. The circuit is housed, and a microphone, a speaker, and an ultrasonic transceiver are integrally attached to the case.

According to a second aspect of the present invention, the microphone has a cheek transmitting structure.

[Operation] According to the present invention described in claim 1, the following operation is provided.

An electronic circuit for transmitting and receiving ultrasonic waves was incorporated in a water-resistant case mounted on the side of the face, and a microphone, a speaker, and an ultrasonic transceiver were integrally mounted. Therefore,
Since there is no need to route cables connecting these parts to each other around the diver, underwater wireless communication can be reliably performed without inconveniencing the diver's operation.

According to the second aspect of the present invention, the following operations are provided.

Since the microphone has a cheek transmitting structure, the voice of the diver can be clearly collected even when the microphone is not installed in a mask mounted at least on the front surface of the mouth of the diver. Therefore, underwater wireless communication can be performed more reliably under the condition that the movement of the diver deforms the mask via the cable connected to the microphone and does not cause water to flow into the mask.

Embodiment FIG. 1A is a front view showing a communication device according to an embodiment of the present invention, FIG. 1B is a side view of FIG.
FIG. 1 (C) is a bottom view of FIG. 1 (A), FIG. 2 is a block diagram showing a communication device, FIG. 3 is a schematic diagram showing a head belt structure, FIG. 4 is a schematic diagram showing a microphone structure, 5 (A) and 5 (B) are schematic diagrams showing a mounted state of the communication device, and FIG. 6 is a schematic diagram showing a use state of the communication device.

The ultrasonic underwater radio communication device 10 is shown in FIG.
(B), as shown in FIG. 6, used together with a mouse mask 11, an eraser 12, and an underwater goggle 13 to be mounted on the head of a diver. 11A is a mask holding band, 12A
Denotes an air exhaust nozzle of the regulator 12.

As shown in FIGS. 1 (A), 1 (B) and 1 (C), the communication device 10 includes a head belt 15, left and right water pressure resistant cases 16, 17, a microphone 18, a speaker 19, an ultrasonic transceiver 20, a transmission / reception switch. It has a switch 21 and a power switch 22.

The head belt 15 can be expanded and contracted depending on the size of the head of the diver using the communication device 10, and gives a comfortable wearing feeling. The head belt 15 is specifically, as shown in FIG.
The bellows portions 24 made of rubber and the like connected to the left and right cases 16 and 17 are connected by a connecting portion 25 made of a plastic plate or the like, and furthermore, from the left and right stainless steel etc. connected to the left and right cases 16 and 17. The spring plate 26 is semi-fixed in an overlapping state inside the connecting portion 25. This allows
By adjusting the overlap length of the left and right spring plates 26, the length of the head belt 15 can be optimized for the current user.
Further, if the inside of the bellows portion 24 is formed as an air tank, the inside of the bellows portion 24 is crushed by water pressure, so that water can flow into and out of the bellows portion 24 freely.

That is, the head belt 15 has an advantage that the length can be easily adjusted and does not deform even when used underwater.

The left and right water pressure resistant cases 16 and 17 are supported by the head belt 15 and attached to the side surface of the diver's face. Case 16
Contains an electronic circuit 27 for transmitting and receiving ultrasonic waves, which will be described in detail later, in a state of a substrate. The other case 17 includes a power supply unit 28
Are exchangeably housed.

The microphone 18 is integrally attached to one of the cases 16, is used in close contact with the diver's cheek, and has a cheek transmitting structure for receiving sound through the cheek.
Specifically, as shown in FIG. 4, the microphone 18 supports a piezoelectric microphone element 31 on a thin rubber plate 32,
31 are provided with sound insulation members 33 and 34 on the back and sides,
32 forms an airbag chamber 32A with the sound insulation member 33. The microphone 18 includes a cup portion 35 around the rubber plate 32, which is in close contact with the side of the face and reduces bubble noise. Thereby, the microphone 18 is connected to the microphone element 31.
The acoustic noise coming from the back surface of the microphone element 31 is blocked by the sound insulation members 33 and 34 and the airbag chamber 32A, and the directivity is provided such that the sound is received only from the front surface of the microphone element 31 in contact with the cheek. Further, the microphone element 31 forms an airbag chamber 32A and is supported by a deformable rubber plate 32, and can receive sound vibration transmitted from cheek meat with high sensitivity. Also, rubber plate 32
Follows the cheek surface at the time of mounting, and does not impair the cheek surface even when the airbag chamber 32A contracts due to water pressure.

The speaker 19 is integrally attached to the left and right cases 16 and 17. The left and right cases 16, 17 are provided with sponge-shaped ear pads 36 to provide a comfortable wearing feeling and suppress external audible noise.

The ultrasonic transmitter / receiver 20 is integrated with the left and right cases 16 and 17 while being provided at the connecting portion 25 of the head belt 15. The ultrasonic transceiver 20 converts an electric signal modulated by a transmitter's voice into an ultrasonic signal, and transmits the ultrasonic signal into water. It also receives ultrasonic signals transmitted by other senders and converts the signals into electrical signals.

The transmission / reception changeover switch 21 is integrally mounted on one case 16, and the power switch 22 is integrally mounted on the other case 17. Under the ON state of the power switch 22, the transmission mode is set when the power switch 21 is pressed, and the reception mode is set when the switch 21 is not pressed. In particular,
The power switch 22 opens and closes the reed switch with a magnet, and turns on when the power switch 22 is pressed to close the reed switch. The changeover switch 21 also opens and closes the reed switch with a magnet, the reception power is turned off by switching the reed switch by pressing the changeover switch 21, and the transmission mode is set, and the transmission power is turned off by switching the reed switch due to the disappearance of the pressing force. To enter the reception mode.

The ultrasonic wave transmitting / receiving electronic circuit 27 is composed of the following four systems (1) to (4) (see FIG. 2).

(1) Transmission system filter 41, transmission signal amplification switch 42, carrier circuit, modulator
A transmission system is configured by 44, a filter 45, a power amplifier 46, and a transmission / reception switch 47.

The sound transmitted by the microphone 18 is emphasized by the filter 41 so that a high frequency range is emphasized so as to be similar to the sound collected at the front of the mouth, and is passed only through the sound band.
The audio wave signal that has passed through the filter 41 is amplified by the amplifier 42 to a certain level.

The carrier circuit 43 generates a carrier signal of, for example, 70 KHz. The modulator 44 generates an amplitude modulation wave from the carrier signal and the audio wave signal.

The signal amplitude-modulated by the modulator 44 is
After removing components other than 70KHz ± 3KHz, power amplifier 4
Amplified at 6. The signal amplified by the power amplifier 46 drives the ultrasonic transceiver 20 via the transmission / reception switch 47 in the transmission mode. The transmission / reception switch 47 is set to one of a transmission mode and a reception mode in conjunction with the switching operation of the transmission / reception switch 21 described above.

(2) Calling System A calling system is constituted by the calling time setting device 51 and the calling frequency circuit 52. That is, when the transmission / reception changeover switch 21 is switched to the transmission mode, the ringing signal of, for example, 900 Hz set by the ringing frequency circuit 52 for 1.5 seconds set by the ringing time setting device 51, for example (1). Is transmitted from the ultrasonic transceiver 20 via the transmission system of the above, and serves as a signal to start transmission.

(3) Reception system A transmission / reception switch 47, a reception signal amplifier 61, a demodulator 62, a filter 63, and a power amplifier 64 constitute a reception system.

The signal received by the ultrasonic transceiver 20 is transmitted to the reception signal amplifier 61 via the transmission / reception switch 47 in the reception mode. The reception signal amplifier 61 gives an automatic level adjustment (ALC) function to the reception signal, and amplifies the reception signal to a certain level.

The demodulator 62 performs diode detection on the constant level signal output from the reception signal amplifier 61 to extract a voice component. Further, the filter 63 passes a component of 3 KHz or less necessary for an audio band, and removes other components. Then, the audio signal is amplified by the amplifier 64, matched with the speaker 19, and the speaker 19 is driven. As a result, the speaker 19 outputs the output signal of the amplifier 64 as an audible sound.

(4) Low voltage alarm system A low voltage alarm system is constituted by the low voltage discriminator 71 and the low voltage frequency circuit 72. When the voltage of the power supply unit 28 is
When the voltage is, for example, 7 V or less, the alarm signal of, for example, 1.3 KHz set by the reduced voltage frequency circuit 72 is output from the speaker 19 via the receiving system of (3).

 Next, the operation of the communication device 10 will be described.

(1) The sound received by the microphone 18 is filtered
The signal passes through only the voice band via the amplifier 41 and the amplifier 42 and is amplified to a certain level. The modulator 44 generates an amplitude modulation wave (AM modulation wave) from the audio wave signal and the carrier wave signal. This amplitude modulated wave is 70KHz ± 3 by filter 45.
After removing components other than KHz, the signal is amplified by the amplifier 46, excites the ultrasonic transceiver 20, and is transmitted underwater by ultrasonic waves.

(2) The signal received by the ultrasonic transceiver 20 is given an automatic level adjustment (ALC) function by the amplifier 61 and amplified, and only the audio component is extracted by the demodulator 62. In addition, filters
A component of 3 KHz or less required as an audio band is passed through 63, the audio signal is amplified by an amplifier 64, and transmitted as an audible sound from the speaker 19.

As shown in FIGS. 5A and 5B, a mouse mask 11 used in conjunction with the communication device 10 is provided around the lips around the front of the face so that clear voices can be produced underwater. Mounted to form as large a mask non-contact area as possible,
In addition, the wearing state is maintained while being attracted to the head by the mask holding band 11A.

 Next, the operation of the above embodiment will be described.

The water pressure resistant cases 16 and 17 attached to the sides of the face have built-in electronic circuits 27 for transmitting and receiving ultrasonic waves,
8. The speaker 19 and the ultrasonic transceiver 20 were integrally mounted. Therefore, since it is not necessary to route cables connecting these parts to each other around the diver, underwater radio communication can be reliably performed without inconveniencing the operation of the diver.

Since the microphone 18 has a cheek transmitting structure, the voice of the diver can be clearly collected even when the microphone 18 is not installed in the mask 11 attached to at least the front of the mouth of the diver. Therefore, underwater wireless communication can be performed more reliably under the condition that the movement of the diver deforms the mask 11 via the cable connected to the microphone 18 and does not cause water to flow into the mask 11.

[Effects of the Invention] As described above, according to the present invention, underwater wireless communication can be reliably performed without inconveniencing the operation of the diver.

Further, according to the present invention, underwater radio communication can be performed more reliably under a state in which water does not flow into a mask attached to at least the front surface of the diver's mouth.

[Brief description of the drawings]

1 (A) is a front view showing a communication device according to an embodiment of the present invention, FIG. 1 (B) is a side view of FIG. 1 (A), and FIG. 1 (C) is FIG. A) is a bottom view, FIG. 2 is a block diagram showing a communication device, FIG. 3 is a schematic diagram showing a head belt structure, FIG. 4 is a schematic diagram showing a microphone structure, and FIGS. 5 (A) and 5 (B). FIG. 6 is a schematic diagram showing a mounted state of the communication device, and FIG. 6 is a schematic diagram showing a used state of the communication device. 10 Communication device, 16, 17 Waterproof case, 18 Microphone, 19 Speaker, 20 Ultrasonic transceiver, 27 Electronic circuit for ultrasonic transmission and reception.

Claims (2)

(57) [Claims] 1. A water-resistant case mounted on the side of the face,
An ultrasonic underwater radio communication device comprising an electronic circuit for transmitting and receiving ultrasonic waves housed in the case, and a microphone, a speaker, and an ultrasonic transceiver are integrally attached to the case. 2. The ultrasonic underwater radio communication device according to claim 1, wherein said microphone has a cheek transmission structure.