JPS5920877A - Sounding body for oceanographic observation - Google Patents

Abstract

PURPOSE:To determine the depth of a sounding body easily by receiving a signal thereof by arranging a depth detector for detecting the depth of the sounding body and a pulse modulated wave generator actuated corresponding to the output of the detector. CONSTITUTION:A depth detector 1 detects water pressure determined by the depth at the position of a sounding body and convert it into voltage or current corresponding to the depth, which is sent to a pulse modulated wave generator 2 provided generate a pulse modulated wave. A pulse modulated wave generated from the generator is controlled in the repetition cycle pulse width or the frequency by the voltage or current corresponding to the depth inputted from the depth detector 1 and converted into ultrasonic wave with a transmitter/receiver 3 to be emitted under water. The signal is received with a wave receiver equipped on a ship thereby enabling the depth of a sounding body for the titled observation to be obtained aboard the ship easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sounding device for marine observation, which is used by being inserted into the sea or installed on the seabed.

Conventional sound generators of this type generate ultrasonic waves of the same frequency for a fixed pulse width at fixed time intervals. For this reason, the following equipment was required on board the ship in order to know the position of the sounder when it was attached to ocean observation equipment and lowered into the sea. First, when a sounding device is taken down from a stopped ship, in order to find out the depth, a precision sounding device that can receive and record the direct ultrasonic sound generated by the sounding device and the waves reflected from the ocean floor is required. In this case, when the water is deep, the propagation distance of the waves reflected from the sea becomes longer, so the sound pressure level of the waves reflected from the sea becomes lower, buried in noise, and difficult to read. The drawback was that it was difficult to accurately read the depth unless it was directly under the ship.

Additionally, if the location of the sound generator was unknown, a three-dimensional positioning device was required, but in this case, if the depth of the sound generator was unknown, only the azimuth and depression angle could be determined. The drawback was that its absolute position could not be determined.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a sound generator in which depth information is superimposed on an ultrasonic signal generated by the sound generator.

According to this invention, the pulse repetition period, pulse width, or frequency of the pulse modulated wave generator inside the sound generator is controlled by the output signal of the depth detector stacked in the sound generator, so that the signal of this sound generator is received. By doing this, you can easily know the depth of the sound generator.

Next, this invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a sounding device for marine observation according to the present invention. In the figure, a depth detector 1 detects the total water pressure determined by the depth at the position of the sound generator, converts it into a voltage or current corresponding to the depth, and sends this voltage or current to a pulse modulated wave generator 2. The pulse modulated wave generator 2 generates a pulse modulated wave, and the depth detector 1
The repetition period, pulse width, or frequency of the pulse modulated wave is controlled by the voltage or current corresponding to the depth input from the oscilloscope. This generated signal is converted into an ultrasonic wave by the transducer 3 and radiated into the water.

FIG. 2 shows details of an embodiment of the pulse modulated wave generator 2 of FIG. 1. In FIG. In the figure, clock excavator 11
generates a clock signal. This output is sent to frequency divider 12, where the repetition period is determined. This output is sent to the monostable multivibrator 13, where the pulse width to be transmitted is determined. This output pulse is the gate circuit 1
4, only while the monostable multivibrator 13 has an output pulse, the output signal of the oscillator 15 that generates the entire transmission frequency appears at the output of the gate circuit 14, and this becomes the output of the pulse modulated wave generator 2. . Here, the output of the depth detector 1 shown in FIG. 1 is connected to the clock 1tJ from the terminal a in FIG.
If, in addition to the F generator 11, the clock excavator 11 is controlled by the voltage or current at the terminal a, a sound generator for marine observation whose repetition period changes depending on deep indulgence can be obtained. In addition, the output of the depth detector 1 is added to the monostable multivibrator 13 from the terminal shown in FIG. By doing so, a sounding device for marine observation whose sibar width changes depending on the depth can be obtained.

Also, the output of the depth detector 1 is connected to the oscillator 15 from the terminal C in FIG.
In addition, by controlling the oscillation frequency of the oscillator 15, a sound generator for marine observation whose transmission frequency changes depending on the depth can be obtained.

The transmitted signal from this marine observation sound generator propagates through the sea, is received by a receiver installed on a ship, and is amplified to read the repetition period, pulse width, or frequency that corresponds to the depth. As a result, the depth of the marine observation sounding device can be easily determined onboard the ship.

As described above, according to the present invention, it is possible to obtain a military sounding device that can easily determine the depth of the sounding device attached to marine observation equipment, etc., so that oceanographic observation can be carried out efficiently. If the sound generator is made to have a balanced weight and buoyancy, it can be used for ocean research, and it can make a great contribution to the field of ocean observation.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing an embodiment of the present invention.
It is a figure which shows one Example of the pulse modulation wave generator shown in a figure. 1... Depth detector, 2... Pulse modulated wave generator, 3... Transmitter/receiver, 11...
Clock oscillator, 12... Frequency divider, 13...
... Monostable multivibrator, 14 ... Gate circuit, 15 ... Oscillator.

Claims (1)

[Claims] In a marine observation sound generator having a transducer and a generator,
a depth detector that detects the depth of the sound generator, and a pulse that is generated by changing the form including the repetition period, pulse width, and transmission frequency of a superimpression wave pulse emitted in response to the output of the depth detector. A sound generator for marine observation comprising a modulated wave generator and a transducer for radiating the output from the pulse modulated wave generator into the water.