JPS63183573U - - Google Patents
Info
- Publication number
- JPS63183573U JPS63183573U JP7534787U JP7534787U JPS63183573U JP S63183573 U JPS63183573 U JP S63183573U JP 7534787 U JP7534787 U JP 7534787U JP 7534787 U JP7534787 U JP 7534787U JP S63183573 U JPS63183573 U JP S63183573U
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- wave
- vehicle
- frequency
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Radar Systems Or Details Thereof (AREA)
Description
第１図はこの考案の一実施例を示す速度測定装
置のブロツク図、第２図は従来の速度測定装置の
ブロツク図である。
図において、１は被測定物体としての車両、２
は電波源、３はサーキユレータ、４はアンテナ、
８は混合検波器、１０は増幅器、１１は計数回路
、１２はマイクロ波スイツチ、１３は測定スイツ
チ、１４は終端器である。なお、図中同一符号は
同一または相当部分を示す。
FIG. 1 is a block diagram of a speed measuring device showing an embodiment of this invention, and FIG. 2 is a block diagram of a conventional speed measuring device. In the figure, 1 is a vehicle as the object to be measured, 2
is a radio wave source, 3 is a circulator, 4 is an antenna,
8 is a mixed detector, 10 is an amplifier, 11 is a counting circuit, 12 is a microwave switch, 13 is a measurement switch, and 14 is a terminator. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
の車両に送信波として発射し、かつ、上記車両か
らの反射波を受信するアンテナと、上記送信波と
上記反射波との周波数混合によつて上記送信波と
上記反射波との差周波数を周波数成分として有す
るドツプラー信号を出力する混合検波器と、上記
ドツプラー信号の周波数計数によつて上記車両の
速度を算出する計数回路を備えた速度測定装置に
おいて、上記電波源と上記アンテナから上記アン
テナに至る経路に設けられたマイクロ波スイツチ
と、上記マイクロ波スイツチをオン／オフし、必
要時上記マイクロ波スイツチをオンさせて上記電
波源からの電波を上記アンテナに供給させるため
の測定スイツチとを備えたことを特徴とする速度
測定装置。 A radio wave source, an antenna that emits radio waves from the radio wave source as a transmission wave to a vehicle as a measured object, and receives a reflected wave from the vehicle, and frequency mixing of the transmission wave and the reflected wave. A speed measurement device comprising: a mixed detector that outputs a Doppler signal having a difference frequency between the transmitted wave and the reflected wave as a frequency component; and a counting circuit that calculates the speed of the vehicle by counting the frequency of the Doppler signal. In the device, a microwave switch is provided on a path from the radio wave source and the antenna to the antenna, and the microwave switch is turned on and off, and when necessary, the microwave switch is turned on to transmit radio waves from the radio wave source. and a measurement switch for supplying the antenna to the antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7534787U JPS63183573U (en) | 1987-05-20 | 1987-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7534787U JPS63183573U (en) | 1987-05-20 | 1987-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63183573U true JPS63183573U (en) | 1988-11-25 |
Family
ID=30921404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7534787U Pending JPS63183573U (en) | 1987-05-20 | 1987-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63183573U (en) |
-
1987
- 1987-05-20 JP JP7534787U patent/JPS63183573U/ja active Pending
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