JPH0464788U

JPH0464788U -

Info

Publication number: JPH0464788U
Application number: JP10934690U
Authority: JP
Priority date: 1990-10-17
Filing date: 1990-10-17
Publication date: 1992-06-03

Description

[Brief explanation of the drawing]

第１図は、本考案の地層探査装置の一実施例を
示すブロツク図、第２図Ａないし第２図Ｄは、第
１図の装置における各信号波形を示す図、第３図
は、従来の地層探査装置の概略ブロツク図である
。１……送受波器、２……送受切替え器、３……
送信部、４……受信部、５……Ａ／Ｄ変換器、６
，９……デジタル相関器、６Ａ……データメモリ
、６Ｂ……係数メモリ、６Ｃ……乗算器、７，１
０……加算器、８……検波器、１１……Ｄ／Ａ変
換器、１２……周波数選択器、１３……係数発生
回路、１４……パルス検出部、１５……表示器。 FIG. 1 is a block diagram showing one embodiment of the geological exploration device of the present invention, FIGS. 2A to 2D are diagrams showing each signal waveform in the device of FIG. 1, and FIG. FIG. 1 is a schematic block diagram of a geological exploration device. 1... Transmitter/receiver, 2... Transmitter/receiver switch, 3...
Transmitter, 4...Receiver, 5...A/D converter, 6
, 9... Digital correlator, 6A... Data memory, 6B... Coefficient memory, 6C... Multiplier, 7,1
0... Adder, 8... Detector, 11... D/A converter, 12... Frequency selector, 13... Coefficient generation circuit, 14... Pulse detector, 15... Display.

Claims

[Scope of Claim for Utility Model Registration] (1) A geological exploration device that explores geological strata using echoes from the ocean floor, which transmits and receives ultrasonic waves of multiple frequencies toward the ocean floor and receives the echoes. an A/D that converts the received signal into a digital signal.
a converter; a data memory in which the output from the A/D converter is stored; a coefficient memory in which coefficient data is stored;
and a first digital correlator consisting of a multiplier that multiplies the corresponding data stored in both memories on the time axis; and a first adder that mutually adds the multiplication outputs from the first digital correlator. a detector for detecting the time-domain compressed signal obtained from the first adder; a second digital correlator for obtaining an envelope output from the detector; a second adder that mutually adds the outputs of the respective multiplications; a D/A converter that converts the output of the second adder into an analog signal; and a pulse that detects a pulse from the output of the D/A converter. A geological exploration device comprising: a detection means; and a coefficient generation circuit that generates predetermined coefficient data corresponding to an exploration frequency for coefficient memories in the first and second digital correlators. . (2) A geological exploration device that emits an ultrasonic detection signal downward from the ship, receives the reflected signal from the bottom of the water, pulse-compresses the received signal, detects this pulse-compressed signal, and displays it on a display. , a transducer that transmits ultrasonic detection signals of a plurality of frequencies toward the water bottom and receives reflected signals from the water bottom, and a selection means that selects one frequency from the plurality of frequencies; a transmitter that generates a detection signal of one selected frequency based on the output signal of the selection means and supplies it to the transducer; and an A/R converter that converts the received signal of the selected frequency into a digital signal. a D converter; a data memory in which the output signal of the A/D converter is stored; a coefficient memory in which coefficient data is stored;
and a digital correlator comprising a multiplier that multiplies corresponding data stored in both memories on the time axis; and an adder that mutually adds the multiplication outputs sent from the digital correlator and supplies it to a detector; A geological exploration device comprising: a coefficient generation circuit that generates predetermined coefficient data corresponding to the selected exploration frequency based on the output signal of the selection means and supplies it to the coefficient memory.