JPS5931069U

JPS5931069U - Obstacle detection device

Info

Publication number: JPS5931069U
Application number: JP12651482U
Authority: JP
Inventors: 敏夫山本; 赤間　康之
Original assignee: 三菱電機株式会社
Priority date: 1982-08-20
Filing date: 1982-08-20
Publication date: 1984-02-27

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 the drawing]

第１図は従来の障害物検出装置の構成図、第２図は第１
図の動作説明のためのタイムチャート図、第３図はこの
考案の第１の実施例を示す構成図、第４図は第３図の動
作説明のためのタイムチャー　　　′ト図、第５図ない
し第７図はいずれもこの考案の第２ないし第４の実施例
を示す構成図である。図において、１・・・超音波送信器、２・・・クロック
パルス発生回路、３・・・超音波送信器駆動回路、４・
・・超音波送信器、８・・・狭帯域増幅回路、９・・・
検波回路、１０，１６．１９，２１．２５・・・フリッ
プフロップ、１１．２２・・・距離信号発生回路、１２
・・・リセットパルス発生回路、１３・・・微分回路、
１４．２０．２４・・・アンド回路、１５・・・アオ回
路である。なお図中同一符号は同−又は相当゛部分を示
すものとする。第２図Ｔ１１　“　　　−１１１１１１１１’ １５ａ！＋　　　　　　＋Ｉ　　　　　　！−＋’ｔ１
ｔ１ａ、　　ｔｚ　ｊ２ａ　　　ｔ−３、ｔ３ｎ　−ｔ
４””　Ｈ”　　ｊ　　　ｊ　　　；３ａ、　　　　　、　− □　　１　　　　　：　　　　　：ｌ　脂：＋ｊｊ：’　　　・　・、　　　− ｉ＋Figure 1 is a configuration diagram of a conventional obstacle detection device, and Figure 2 is a diagram of a conventional obstacle detection device.
3 is a block diagram showing the first embodiment of this invention. FIG. 4 is a time chart for explaining the operation of FIG. 3. FIG. 5 is a time chart diagram for explaining the operation of FIG. 7 to 7 are configuration diagrams showing second to fourth embodiments of this invention. In the figure, 1... Ultrasonic transmitter, 2... Clock pulse generation circuit, 3... Ultrasonic transmitter drive circuit, 4...
...Ultrasonic transmitter, 8...Narrowband amplifier circuit, 9...
Detection circuit, 10, 16.19, 21.25...Flip-flop, 11.22...Distance signal generation circuit, 12
... Reset pulse generation circuit, 13... Differentiation circuit,
14.20.24...AND circuit, 15...AO circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts. Fig. 2 T1 1 " -11 111111' 15a!+ +I !-+'t1
t1a, tz j2a t-3, t3n -t
4""H" j j; 3a, , - □ 1: : l Fat: +jj:' ・・, − i+

Claims

[Scope of utility model registration request]

an ultrasonic transmitter that emits ultrasonic waves based on electrical signals;
a clock pulse generation circuit that generates clock pulses at regular intervals; an ultrasonic transmitter drive circuit that drives the ultrasonic transmitter for a certain period of time in synchronization with the clock pulses to emit ultrasonic waves; and the ultrasonic transmitter. An ultrasonic receiver that receives the reflected wave reflected by an obstacle out of the transmitted wave emitted by the object and converts it into an electrical signal, and selectively amplifies specific frequency components of the output signal of this ultrasonic receiver. A narrowband amplification circuit, a detection circuit that detects that the output signal of the narrowband amplification circuit is equal to or higher than a predetermined reference value, and a signal indicating a time corresponding to a predetermined distance that is synchronized with the clock pulse. A distance signal generating circuit that outputs a distance signal, and an output signal of the distance signal generating circuit and an output signal of the detecting circuit over at least two consecutive cycles of the clock pulse, detect the obstacle at the predetermined distance. An obstacle detection device comprising: an obstacle detection circuit that outputs a signal indicating that there is an obstacle; and a reset pulse generation circuit that resets the obstacle detection circuit when there is no obstacle.