JPH10153450A - Diving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diving system by which a diver in the water, can correctly grasp the position of a ship. SOLUTION: A pulse generator 3 and a pulse generator of a navigation device 6 are reset before diving. An ultrasonic wave pulse signal from an ultrasonic wave speaker 4 is received by the navigation device 6 during the diving, a lag of the timing between the received pulse signal and a pulse signal from the integrated pulse generator, is measured, and the distance to a boat 2 is calculated on the basis of the result of the measurement. The navigation device 6 comprises six ultrasonic wave microphones arranged at intervals of 60 deg. on a circumference, and the direction of the boat 2 is known from the position of the ultrasonic wave microphone which received the ultrasonic wave pulse signal from the ultrasonic wave speaker 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diving system and a diving system, and more particularly, to a diving system and a diving system that enable a diver to accurately grasp the position of a ship from underwater.

[0002]

2. Description of the Related Art When a diver dives underwater from a boat in the sea or a lake, the diver must accurately grasp the diver's position from the boat in order to safely return to the boat after diving. It is necessary to know the position of the boat accurately. Conventionally, each diver has a magnetic compass (hereinafter also referred to as a compass), grasps its own traveling direction and traveling distance, and performs diving while memorizing these traveling direction, traveling distance and surrounding scenery. I have. Then, when returning to the boat, based on these stored information, it returns to the boat along the reverse route.

[0003]

However, in the past, diving required considerable training and experience because of returning to the boat from underwater relying on the diver's memory in this way. Therefore, for beginners,
Diving was dangerous. In order to solve such problems, a boat occupant can follow a diver from the water with a boat using the bubbles generated on the water surface by the diver's exhaled breath (drift diving)
It has been known. However, in this drift diving, a considerably skilled person needs to steer the boat, and if the diver loses his or her position, it will be very difficult to track the diver thereafter.

An object of the present invention is to provide a diving system and a diving system that enable a diver to accurately grasp the position of a ship from underwater.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art and to achieve the above-mentioned object, a diving system according to the present invention comprises a first pulse signal generator for generating a first pulse signal. Means for transmitting a transmission pulse signal corresponding to the first pulse signal into the water, and a second pulse signal having the same frequency as the first pulse signal. A second pulse signal generating means, a plurality of pulse signal receiving means arranged at a predetermined angular interval on a circumference and receiving the transmission pulse signal, a reception pulse signal received by the pulse signal means means, Calculating means for calculating a distance to the ship from a timing shift with respect to the second pulse signal and obtaining a direction of the ship based on a position of the pulse signal receiving means having received the transmission pulse signal; Display means for displaying the calculated distance to the ship and the direction of the ship, a guide device carried by the diver when diving, the first pulse signal generating means and the second The pulse signal generating means is reset at the same time.

Further, in the diving system of the present invention, preferably, the guide device includes six pulse signal receiving means on the circumference at 60 ° angular intervals, and the transmission pulse signal transmitted from an arbitrary angle is provided. Are received by the two pulse signal receiving means.

[0007] In the diving system of the present invention, a diver performs diving by attaching a guide device to an arm or the like. The guide device receives a transmission pulse signal from the ship underwater, determines the distance to the ship and the direction of the ship based on the received pulse signal, and displays the result on the display means. Therefore, for example, even a novice diver can easily return to the ship based on the display on the display means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a diving system and a diving method according to an embodiment of the present invention will be described.
FIG. 1 is a diagram for explaining a diving system 1 according to the present embodiment. As shown in FIG. 1, in the diving system 1, an ultrasonic pulse signal S <b> 4 is generated from an ultrasonic speaker 4 provided on the bottom of the boat 2. The ultrasonic pulse signal S4 is detected by the navigation device 6 of the diver 5, and the position of the boat 2 is displayed. As shown in FIG. 1, the boat 2 includes a pulse generator 3
And an ultrasonic speaker 4.

The pulse generator 3 has a reset function and a period time setting function. When a reset request is generated as shown in FIG. 4A, the pulse generator 3 resets and generates a predetermined periodic pulse signal S3. The ultrasonic speaker 4 is a boat 2
And transmits a transmission ultrasonic pulse signal S4 toward the water according to the periodic pulse signal S3 from the pulse generator 3 shown in FIG. At this time, as the frequency of the transmission ultrasonic pulse signal S4, a frequency in a band suitable for underwater transmission and reception is used, and specifically, for example, 50 to 200 kHz used for a fish finder and the like.

The navigation device 6 includes a timer 10,
It includes a pulse generator 11, an operation / display unit 12, and ultrasonic microphones 13a, 13b, 13c, 13d, 13e, 13f. The pulse generator 11 has the same configuration as the pulse generator 3 and has a reset function and a cycle time setting function. When a reset request is generated as shown in FIG. Periodic pulse signal S1
1 is generated.

The ultrasonic microphones 13a, 13b, 13c, 1
3d, 13e and 13f are arranged at intervals of about 60 ° on the inner circumference of the circular shape of the navigation device 6. Ultrasonic microphone 1
3a to 13f have a detection directivity angle of about 120 °. The ultrasonic microphones 13a to 13f are configured to be able to receive the transmission ultrasonic pulse signal S4 transmitted from the pulse generator 3 of the boat 2. Due to the arrangement of the ultrasonic microphones 13a to 13f, the ultrasonic pulse signal S4 from the pulse generator 3 is always received by any two ultrasonic microphones 13a to 13f. At this time, the ultrasonic microphones 13a-
FIG. 4D shows the reception ultrasonic pulse S13 of the ultrasonic microphone that has received the signal 13f.

The timer 10 includes a periodic pulse S11 from the pulse generator 11 and the ultrasonic microphone 1 that has received the pulse.
The time difference between the received ultrasonic pulses S13 from 3a to 13f is measured.

The operation / display unit 12 includes an ultrasonic microphone 13a.
Based on the reception results of .about.13f and the measurement result of the timer 10, the direction in which the boat 2 is located and the distance to the boat 2 are calculated, and the calculation results are displayed. At this time, the distance to the boat 2 is calculated using, for example, the following equation (1).

[0014]

[Equation 1] (Distance to boat) = (Measurement time of timer 10) × (Underwater sound velocity) (1)

The operation of the diving system 1 shown in FIG. 1 will be described below. First, before the diver 5 dives underwater from the boat 2, the pulse generator 3 of the boat 2 and the pulse generator 11 of the navigation device 6 are simultaneously reset. As a result, as shown in FIGS. 4A and 4C, the timing of the periodic pulse signal S3 from the pulse generator 3 and the timing of the periodic pulse signal S11 from the pulse generator 11 are synchronized. Further, a transmission ultrasonic pulse signal S4 synchronized with the periodic pulse S3 is transmitted from the ultrasonic speaker 4 of the boat 2 into the water.

Thereafter, the diver 5 having the navigation device 6 mounted on his or her arm starts dive. Then, the transmitted ultrasonic pulse S4 transmitted from the ultrasonic speaker 4 is transmitted to the ultrasonic microphones 13a to 13f of the underwater navigation device 6.
Are received by two ultrasonic microphones. At this time, since there is a distance between the ultrasonic speaker 4 and the navigation device 6, the ultrasonic pulse signal S1 received by the ultrasonic microphone is received.
3 is a signal delayed by a predetermined time delay from the transmission ultrasonic pulse signal S4 as shown in FIG. 4 (D). This shift time is proportional to the distance between the ultrasonic speaker 4 and the navigation device 6.

Then, the timer 10 of the navigation device 6 measures the time difference between the periodic pulse S11 and the received ultrasonic pulse signal S13, and outputs the measurement result to the calculation / display unit 12. And operation / display 1
2, the measurement result of the timer 10 and the ultrasonic microphone 1
Based on the reception results of 3a to 13f, the direction of the boat 2 and the distance to the boat 2 are obtained and displayed. Less than,
The principle of calculating the direction of the boat 2 in the calculation / display unit 12 will be described. FIG. 3 is a diagram illustrating directivity characteristics of a general ultrasonic microphone. The ultrasonic microphone has a characteristic that the reception level of sound incident from the front is high and the reception level of sound incident from the side is low. Therefore, even with ultrasonic waves of the same intensity, the level received by the ultrasonic microphone differs depending on the incident direction, and this can be used to specify the direction in which the ultrasonic waves are output (the direction of the boat). For example,
In the example shown in FIG. 3, when the reception level of one of the ultrasonic microphones is 65%, it can be seen that the ultrasonic waves are incident from the left or right direction at 30 °. Then, from the reception level of the other ultrasonic microphone, it is possible to identify from which direction the ultrasonic wave is incident.

As described above, according to the diving system 1, the diver 5 can accurately know the direction and the distance of the boat 2 from the display on the navigation device 6. Therefore, the diver 5 can safely return to the boat 2 from underwater.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the number of the ultrasonic microphones of the navigation device 6 is set to six. However, the number of the ultrasonic microphones is not particularly limited. When the direction is measured with higher accuracy, the number is further increased. May be increased.

[0020]

As described above, according to the diving system of the present invention, a diver can accurately know the direction and distance of a boat from underwater. Therefore, the diver can safely return to the boat from underwater.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a diving system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a navigation device held by a diver in the diving system shown in FIG. 1;

FIG. 3 is a diagram illustrating directivity characteristics of a general ultrasonic microphone.

FIG. 4A is a waveform diagram of a periodic pulse signal generated by a pulse generator provided in a boat, and FIG. 4B is a waveform of a transmitted ultrasonic pulse signal generated by an ultrasonic speaker of the boat. FIG. 4C is a waveform diagram of a periodic pulse signal generated by a pulse generator provided in the navigation device.
FIG. 4D is a waveform diagram of a received ultrasonic pulse signal received by the navigation device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Diving system, 2 ... Boat, 3 ... Pulse generator, 4 ... Ultrasonic speaker, 5 ... Diver, 6 ... Navigation device, 10 ... Timer, 11 ... Pulse generator, 1
2 ... Calculation / display, 13a-13f ... Ultrasonic microphone

Claims (2)

[Claims] 1. A ship comprising: first pulse signal generating means for generating a first pulse signal; and pulse signal transmitting means for transmitting a transmission pulse signal corresponding to the first pulse signal toward underwater. A second pulse signal generating means for generating a second pulse signal having the same frequency as the first pulse signal; and a plurality of pulse signal generators arranged at predetermined angular intervals on the circumference to receive the transmission pulse signal A pulse signal receiving means, a distance to the ship is calculated from a timing difference between the received pulse signal received by the pulse signal means means and the second pulse signal, and the pulse signal receiving means receives the transmission pulse signal. Computing means for obtaining the direction of the ship based on the position; and display means for displaying the computed distance to the ship and the direction of the ship, and a guide device carried by the diver during diving. , Diving system for simultaneously resetting the first pulse signal generating means and said second pulse signal generating means prior to the start diving. 2. The guide device according to claim 1, further comprising: six pulse signal receiving means on the circumference at 60 ° angular intervals, wherein the two pulse signal receiving means receive the transmission pulse signal transmitted from an arbitrary angle. The diving system according to claim 1, wherein