JPS5847998U

JPS5847998U - Ultrasonic vehicle detection device

Info

Publication number: JPS5847998U
Application number: JP14060581U
Authority: JP
Inventors: 鶴井　省三
Original assignee: オムロン株式会社
Priority date: 1981-09-22
Filing date: 1981-09-22
Publication date: 1983-03-31

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図は本考案の超音波車両検知装置を道路に設置した
配置図、第２図はその概略の構成を示すブロック図、第
３に車両検知部、第４図は受信部の夫々詳細を示すブロ
ック図、第５図ａ　−ｋは車両検知部、第６図ａ　％　
ｋは受信部の動作を示す波形図である。２、　３．　４・・・・・・車両検知部、２ａ、　　３
ａ、　　４ａ・・・・・・超音波感知ユニット、２ｂ、
　　３ｂ、　　４ｂ・・・・・・伝送ユニット、５・・
・・・・受信部、５ａ・・・・・・受信ユニット、５ｂ
・・・・・・分離ユニット、８，１７・・・・・・超音
波発振器、１１．　２０．　２２・・・・・・超音波振
動子、２Ｂ・・・・・・周波数判別回路。Figure 1 is a layout diagram of the ultrasonic vehicle detection device of the present invention installed on a road, Figure 2 is a block diagram showing its general configuration, Figure 3 shows details of the vehicle detection section, and Figure 4 details of the reception section. The block diagram shown in Fig. 5 a - k is the vehicle detection section, and Fig. 6 a %
k is a waveform diagram showing the operation of the receiving section. 2, 3. 4...Vehicle detection section, 2a, 3
a, 4a... Ultrasonic sensing unit, 2b,
3b, 4b...Transmission unit, 5...
...Receiving section, 5a...Receiving unit, 5b
... Separation unit, 8, 17 ... Ultrasonic oscillator, 11. 20. 22... Ultrasonic transducer, 2B... Frequency discrimination circuit.

Claims

[Claims for Utility Model Registration] An ultrasonic sensing unit that intermittently emits ultrasonic waves above the road surface and receives the reflected waves when the ultrasonic waves stop, and ultrasonic signals of different frequencies depending on the reflected wave signals. A plurality of vehicle detection units each having a transmission unit that emits the signal toward the side of the road are buried in the road, and the side of the road receives the ultrasonic signal of the transmission unit of each of the vehicle detection units and transmits the ultrasonic signal to the side of the road. An ultrasonic vehicle detection device comprising a receiving section that separates signals based on a difference in frequency.