JPS6440937U - - Google Patents
Info
- Publication number
- JPS6440937U JPS6440937U JP13547587U JP13547587U JPS6440937U JP S6440937 U JPS6440937 U JP S6440937U JP 13547587 U JP13547587 U JP 13547587U JP 13547587 U JP13547587 U JP 13547587U JP S6440937 U JPS6440937 U JP S6440937U
- Authority
- JP
- Japan
- Prior art keywords
- received signal
- detection circuit
- length
- receiver
- abnormality
- 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 6
- 230000005856 abnormality Effects 0.000 claims 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Description
第１図は本考案による信号端局装置の受信器の
一実施例を示すブロツク図、第２図は搬送保護継
電システムの一例を示すブロツク図、第３図は従
来の信号端局装置の受信器の一例を示すブロツク
図である。
２……受信回路、３……受信信号断検出回路、
４……周波数ずれ検出回路、５……安定化回路。
Fig. 1 is a block diagram showing an embodiment of the receiver of the signal terminal equipment according to the present invention, Fig. 2 is a block diagram showing an example of the carrier protection relay system, and Fig. 3 is a block diagram showing an example of the receiver of the signal terminal equipment according to the present invention. FIG. 2 is a block diagram showing an example of a receiver. 2...Reception circuit, 3...Reception signal disconnection detection circuit,
4... Frequency shift detection circuit, 5... Stabilization circuit.
Claims (1)
器において、受信信号を入力とする受信回路と、
前記受信信号の半サイクル長または一サイクル長
を測定し規定長以外のときには異常とする周波数
ずれ検出回路と、前記受信信号のレベルを測定し
規定レベル以下のときには異常とする受信信号断
検出回路とにより構成し、前記周波数ずれ検出回
路と前記受信信号断検出回路のいずれかが異常検
出時は前記受信回路の出力を安全側にロツクする
ようにしたことを特徴とする信号端局装置の受信
器。 In a receiver of a signal terminal device used in a carrier protection relay device, a receiving circuit that receives a received signal as an input;
a frequency deviation detection circuit that measures the half cycle length or one cycle length of the received signal and determines an abnormality when the length is other than a specified length; and a received signal disconnection detection circuit that measures the level of the received signal and determines that it is abnormal when it is below a specified level. A receiver for a signal terminal device, characterized in that the output of the receiving circuit is locked to a safe side when either the frequency shift detection circuit or the received signal disconnection detection circuit detects an abnormality. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13547587U JPS6440937U (en) | 1987-09-07 | 1987-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13547587U JPS6440937U (en) | 1987-09-07 | 1987-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6440937U true JPS6440937U (en) | 1989-03-10 |
Family
ID=31395133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13547587U Pending JPS6440937U (en) | 1987-09-07 | 1987-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6440937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466289U (en) * | 1990-10-19 | 1992-06-10 | ||
| JPH06307172A (en) * | 1993-04-24 | 1994-11-01 | Tokyu Constr Co Ltd | Assemblable/disassemblable shutter capable for construction work |
-
1987
- 1987-09-07 JP JP13547587U patent/JPS6440937U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466289U (en) * | 1990-10-19 | 1992-06-10 | ||
| JPH06307172A (en) * | 1993-04-24 | 1994-11-01 | Tokyu Constr Co Ltd | Assemblable/disassemblable shutter capable for construction work |
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