JPS6074071U

JPS6074071U - Ultrasonic distance measuring device

Info

Publication number: JPS6074071U
Application number: JP16603283U
Authority: JP
Inventors: 毅相澤; 耕一岩田; 根本　友文
Original assignee: 株式会社明電舎
Priority date: 1983-10-28
Filing date: 1983-10-28
Publication date: 1985-05-24

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は超音波距離測定装置の回路構成図、第２図は第
１図に示す回路の各部の動作タイミングを示す図、第３
図は第１図に示す装置の従来の超音波受信回路の構成図
、第４図は本考案による超音波距離測定装置の超音波受
信回路の一実施例の構成図、第５図は第４図に示す受信
回路の絶対値回路の１例を示す構成図、第６図は第１図
及び第４図で示される本考案に係る回路の各部動作タイ
ミングを示す図である。図面中、１は中央処理装置、２はロジック回路、３は超
音波発信回路、４ａは超音波受信回路、５は超音波発信
子、６は超音波受信子、７はアクティブバンドパスフィ
ルタ、８は増幅器、９はコンパレータ、１０は波形整形
回路、１１はトリガ・ラッチ回路、１２は絶対値回路で
ある。Figure 1 is a circuit configuration diagram of the ultrasonic distance measuring device, Figure 2 is a diagram showing the operation timing of each part of the circuit shown in Figure 1, and Figure 3 is a diagram showing the operation timing of each part of the circuit shown in Figure 1.
The figure is a block diagram of a conventional ultrasonic receiving circuit of the device shown in Fig. 1, FIG. 4 is a block diagram of an embodiment of the ultrasonic receiving circuit of the ultrasonic distance measuring device according to the present invention, and FIG. FIG. 6 is a block diagram showing an example of the absolute value circuit of the receiving circuit shown in the figure, and FIG. 6 is a diagram showing the operation timing of each part of the circuit according to the present invention shown in FIGS. 1 and 4. In the drawing, 1 is a central processing unit, 2 is a logic circuit, 3 is an ultrasonic transmitter circuit, 4a is an ultrasonic receiver circuit, 5 is an ultrasonic transmitter, 6 is an ultrasonic receiver, 7 is an active bandpass filter, 8 9 is an amplifier, 9 is a comparator, 10 is a waveform shaping circuit, 11 is a trigger/latch circuit, and 12 is an absolute value circuit.

Claims

[Scope of utility model registration request]

In an ultrasonic distance measuring device that transmits and receives ultrasonic waves at predetermined timing and measures the distance to an object based on the reception time width of the reflected or transmitted ultrasonic waves, all received waves are sent to the ultrasonic receiving circuit. An ultrasonic distance measuring device comprising: an absolute value circuit that rectifies waves; and a comparator that compares the output of the absolute value circuit with a specific reference voltage to determine the arrival point of a received wave.