JPH0441678U

JPH0441678U -

Info

Publication number: JPH0441678U
Application number: JP8247090U
Authority: JP
Priority date: 1990-08-02
Filing date: 1990-08-02
Publication date: 1992-04-08
Anticipated expiration: 2005-08-02
Also published as: JP2552311Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す図、第２図
はこの考案の他の実施例を示す図、第３図は第２
図を説明するための図、第４図はこの考案の他の
実施例を示す図、第５図は第４図を説明するため
の図、第６図はこの考案の他の実施例を示す図、
第７図は、従来の車両感知器を示す図、第８図は
第７図を説明するための図である。図において、１はオシレータ、２は電源、３は
第１のスイツチ、４はタイミング回路、５はサー
キユレータ、６はアンテナ、７は検波器、８は車
両検出部、９はアンプ、１０は第２のスイツチ、
１１はパルサー、１２は第１のカプラ、１３は第
２のカプラ、１４はミキサ、１５は速度検出部で
ある。なお、各図中同一符号は同一又は相当部分
を示す。 Figure 1 is a diagram showing one embodiment of this invention, Figure 2 is a diagram showing another embodiment of this invention, and Figure 3 is a diagram showing a second embodiment of this invention.
Figure 4 is a diagram showing another embodiment of this invention; Figure 5 is a diagram explaining Figure 4; Figure 6 is a diagram showing another embodiment of this invention. figure,
FIG. 7 is a diagram showing a conventional vehicle sensor, and FIG. 8 is a diagram for explaining FIG. 7. In the figure, 1 is an oscillator, 2 is a power supply, 3 is a first switch, 4 is a timing circuit, 5 is a circulator, 6 is an antenna, 7 is a detector, 8 is a vehicle detection section, 9 is an amplifier, 10 is a second switch,
11 is a pulser, 12 is a first coupler, 13 is a second coupler, 14 is a mixer, and 15 is a speed detection section. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) An oscillator, a power supply connected to the oscillator, a first switch connected to the oscillator that turns on and off the output of the oscillator, and a first switch connected to the first switch that turns on and off the switch 1. a timing circuit that generates the timing for the first switch; a circulator connected to the first switch; and an antenna connected to the circulator;
A vehicle sensor comprising a detector connected to the circulator, and a vehicle detection unit connected to the detector and detecting the presence or absence of a vehicle based on the output level of the detector. A vehicle sensor characterized by the addition of an amplifier that amplifies waves. (2) an oscillator, a power supply connected to the oscillator, a first switch connected to the oscillator that turns on and off the output of the oscillator, and a timing that connects to the first switch and generates the timing to turn the first switch on and off. a circuit, a circulator connected to the first switch, an antenna connected to the circulator, an amplifier connected to the circulator to amplify microwaves, a detector connected to the amplifier, and an output of the detector connected to the detector. A vehicle sensor comprising a vehicle detection section that detects the presence or absence of a vehicle based on a level, characterized in that a second switch is added that is connected to the amplifier, the detector, and the timing circuit and turns on and off the microwave. Vehicle detector. (3) an oscillator, a power supply connected to the oscillator, a first switch connected to the oscillator that turns on and off the output of the oscillator, and a timing that connects to the first switch and generates the timing to turn on and off the first switch. a circuit, a circulator connected to the first switch, an antenna connected to the circulator, a detector connected to the circulator, and a vehicle detection section connected to the detector and detecting the presence or absence of a vehicle from the output level of the detector. A vehicle sensor comprising: a vehicle sensor further comprising a pulser connected to the oscillator, the power source, and the timing circuit. (4) an oscillator, a power supply connected to the oscillator, a first switch connected to the oscillator that turns on and off the output of the oscillator, and a timing that connects to the first switch and generates the timing to turn on and off the first switch. a circuit, a circulator connected to the first switch, an antenna connected to the circulator, a detector connected to the circulator, and a vehicle detection section that detects the presence or absence of a vehicle based on the output level of the detector connected to the detector. A vehicle sensor comprising: a first coupler connected to the first switch and the circulator; a second coupler connected to the circulator and the detector; and a second coupler connected to the first coupler and the second coupler. A vehicle sensor comprising a mixer connected to the mixer and a speed detection section connected to the mixer.