JPS6454430U - - Google Patents
Info
- Publication number
- JPS6454430U JPS6454430U JP14842187U JP14842187U JPS6454430U JP S6454430 U JPS6454430 U JP S6454430U JP 14842187 U JP14842187 U JP 14842187U JP 14842187 U JP14842187 U JP 14842187U JP S6454430 U JPS6454430 U JP S6454430U
- Authority
- JP
- Japan
- Prior art keywords
- antenna system
- detecting
- current
- abnormality
- field strength
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Transmitters (AREA)
Description
第１図は本考案の空中線系異常検出回路の一実
施例を示した回路図、第２図は従来の空中線系異
常検出回路の一例を示した回路図である。
１……送信機、２……電源スイツチ、４ａ，４
ｂ……空中線系、１０……表示部、１１，２１…
…リレー、１２……スイツチ、１３……空中線系
異常出力部、１４……直流カツト用コンデンサ、
１５……検出信号伝送部、１６……受信アンテナ
、１７……受信器、１８……電界強度低下検出部
、２０……トランジスタ、２２……直流電源。
FIG. 1 is a circuit diagram showing an embodiment of the antenna system abnormality detection circuit of the present invention, and FIG. 2 is a circuit diagram showing an example of a conventional antenna system abnormality detection circuit. 1...Transmitter, 2...Power switch, 4a, 4
b... Antenna system, 10... Display section, 11, 21...
... Relay, 12 ... Switch, 13 ... Antenna system abnormal output section, 14 ... DC cut capacitor,
15...Detection signal transmission unit, 16...Receiving antenna, 17...Receiver, 18...Field strength drop detection unit, 20...Transistor, 22...DC power supply.
Claims (1)
放射する空中線系を介して直流電流を流し、この
直流電流の有無によつて前記空中線系の異常を検
出する空中線系異常検出回路において、前記空中
線系から放射される電波を受信して受信電波の電
界強度を検出する電界強度検出手段と、この電界
強度検出手段によつて前記電界強度が一定レベル
以下となつた場合に前記空中線系へ流している前
記直流電流の供給を停止させる直流電流遮断手段
と、前記空中線系を介して流れてくる前記直流電
流の有無を検出する電流検出手段と、前記電流検
出手段によつて前記直流電流が検出されない場合
に前記空中線系の異常を報知する異常報知手段と
を具備したことを特徴とする空中線系異常検出回
路。 An antenna system abnormality detection circuit that flows a DC current through an antenna system that radiates carrier wave power output from a transmitter as a radio wave, and detects an abnormality in the antenna system based on the presence or absence of this DC current. a field strength detection means for receiving radiated radio waves and detecting the field strength of the received radio waves; and a field strength detection means for detecting the field strength of the received radio waves; a direct current interrupting means for stopping the supply of direct current; a current detecting means for detecting the presence or absence of the direct current flowing through the antenna system; and when the direct current is not detected by the current detecting means. An antenna system abnormality detection circuit comprising: abnormality reporting means for reporting an abnormality in the antenna system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14842187U JPS6454430U (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14842187U JPS6454430U (en) | 1987-09-30 | 1987-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6454430U true JPS6454430U (en) | 1989-04-04 |
Family
ID=31419732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14842187U Pending JPS6454430U (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6454430U (en) |
-
1987
- 1987-09-30 JP JP14842187U patent/JPS6454430U/ja active Pending
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