JPS6128060U

JPS6128060U - Non-contact speed detection device

Info

Publication number: JPS6128060U
Application number: JP1984111626U
Authority: JP
Inventors: 春日江藤
Original assignee: カルソニックカンセイ株式会社
Priority date: 1984-07-25
Filing date: 1984-07-25
Publication date: 1986-02-19

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図はこの考案の一実施例である非接触速度検出装置
の要部を示す回路図、第２図はこの考案による上記実施
例回路における波形図、第３図は従来の非接触速度検出
装置のフロック構成図、第４図は上記従来のブ七ツク構
成図に対応した実際の回路図、第５図は空間周波数フィ
ルタを説明するための説明図、第６図は従来の上記装置
の動作を説明するための波形図、第７図は従来の上記装
置のラッチ回路の動作を説明するための波形図である。、１・・・路面、１０・・・空間周波数フィルタ、１
１，１２・・・第１の充電変換手段、１３・・・第２の
光電変換手段、２２・・・差動増幅路、２４・・・波形
変換回路、２６・・・遅延回路。なお、図中、同一符号は同一、又は相当部分を示す。Fig. 1 is a circuit diagram showing the main parts of a non-contact speed detection device which is an embodiment of this invention, Fig. 2 is a waveform diagram in the circuit of the above embodiment according to this invention, and Fig. 3 is a conventional non-contact speed detection device. FIG. 4 is an actual circuit diagram corresponding to the conventional block diagram of the device, FIG. 5 is an explanatory diagram for explaining the spatial frequency filter, and FIG. 6 is a diagram of the conventional block diagram of the device. FIG. 7 is a waveform diagram for explaining the operation of the latch circuit of the above-mentioned conventional device. , 1... Road surface, 10... Spatial frequency filter, 1
DESCRIPTION OF SYMBOLS 1, 12... 1st charge conversion means, 13... 2nd photoelectric conversion means, 22... Differential amplifier path, 24... Waveform conversion circuit, 26... Delay circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

The light flux from the road surface 1 is received by a first photoelectric conversion means 11, 12 having a striped sensitivity pattern and by a second photoelectric conversion means 13 having an entire surface sensitivity pattern, and the first and second photoelectric conversion means A spatial frequency filter 10 outputs electrical signals from 11, 12, and 13, and by taking the difference between two output signals from the spatial frequency film 10, an electrical signal with a frequency proportional to the speed relative to the road surface 1 is output. A differential amplifier circuit 22 that performs the differential amplifier circuit 22, a delay circuit 26 that appropriately delays the output signal of the differential amplifier circuit 22, and a magnitude relationship between the output signal of the differential amplifier circuit 22 and the output signal of the delay circuit 26 are compared. A non-contact speed detection device comprising a waveform conversion circuit 24 consisting of a comparator.