JPS59166187U

JPS59166187U - Ultrasonic distance measuring device

Info

Publication number: JPS59166187U
Application number: JP5939983U
Authority: JP
Inventors: 毅相澤; 耕一岩田
Original assignee: 株式会社明電舎
Priority date: 1983-04-22
Filing date: 1983-04-22
Publication date: 1984-11-07

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図ないし第４図は従来の超音波受信部に係り、第１
図はブロック図、第２図は波形図、第３図は波形図、第
４図はタイミングチャートであり、第５図ないし第８図
は本考案による超音波距離測定装置の受信部の一例で、
第５図はブロック図、第６図は非線形回路の二つの例を
示すブロック図、第７図はピーク検出回路のブロック図
、第８図は。タイミングチャートである。図面中、６はバンドパスフィルタ、７は非線形回路、８
はピーク検出回路、９はトリガラッチ回路である。Figures 1 to 4 relate to a conventional ultrasonic receiving section, and the first
The figure is a block diagram, Figure 2 is a waveform diagram, Figure 3 is a waveform diagram, Figure 4 is a timing chart, and Figures 5 to 8 are examples of the receiving section of the ultrasonic distance measuring device according to the present invention. ,
FIG. 5 is a block diagram, FIG. 6 is a block diagram showing two examples of nonlinear circuits, FIG. 7 is a block diagram of a peak detection circuit, and FIG. 8 is a block diagram. This is a timing chart. In the drawing, 6 is a bandpass filter, 7 is a nonlinear circuit, and 8 is a bandpass filter.
9 is a peak detection circuit, and 9 is a trigger latch circuit.

Claims

[Scope of utility model registration request]

(1) In an ultrasonic distance measuring device that measures the distance to an object by emitting ultrasonic pulses and receiving reflected waves from the object, only a predetermined frequency component is detected from the output signal of the receiving ultrasonic sensor. A bandpass filter to extract, a nonlinear circuit that amplifies the output signal of this bandpass filter and removes small signal components from this output signal, and detects the peak position and value of the output signal of this nonlinear circuit. A peak detection circuit, a trigger latch circuit that generates and latches a trigger using the output signal of this peak detection circuit, measures the time between the ultrasonic pulse transmission time and the peak value detection time, and transmits ultrasonic waves to the receiving ultrasonic sensor. An ultrasonic distance measuring device consisting of calculations and circuits that back-calculate and correct the delay time from when the peak value is reached to when the peak value is detected.

(2) As a nonlinear circuit, two diodes or two Zener diodes connected in anti-parallel are placed after an amplifier, or a comparator is placed after an amplifier, as claimed in Claim 1 of the Utility Model Registration. The ultrasonic distance measuring device described in .

(3) The peak detection circuit is connected to the peak hold circuit.
・An ultrasonic distance measuring device according to claim 1 of the utility model registration claim, which is constituted by a parator circuit.