JPH0464779U - - Google Patents
Info
- Publication number
- JPH0464779U JPH0464779U JP10816190U JP10816190U JPH0464779U JP H0464779 U JPH0464779 U JP H0464779U JP 10816190 U JP10816190 U JP 10816190U JP 10816190 U JP10816190 U JP 10816190U JP H0464779 U JPH0464779 U JP H0464779U
- Authority
- JP
- Japan
- Prior art keywords
- loop current
- section
- loop
- detection
- circuit
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000009413 insulation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
第１図は本考案によるループ抵抗検出回路の一
実施例を示す回路図、第２図は従来から知られて
いるセキユリテイシステムの一例を示すブロツク
図、第３図は従来から知られているセキユリテイ
システムの他の一例を示すブロツク図、第４図は
第３図に示すループ抵抗検出回路の一例を示す回
路図、第５図は第３図に示すループ抵抗検出回路
の他の一例を示す回路図である。
１……ループ抵抗検出回路、２……センサ、４
，８……ループ電流検出部（抵抗）、５，９……
増幅部（トランジスタ）、６，１０……絶縁部（
フオトカプラ）、１２……後段回路（判定回路）
、１３……ケーブル。
Fig. 1 is a circuit diagram showing an embodiment of the loop resistance detection circuit according to the present invention, Fig. 2 is a block diagram showing an example of a conventionally known security system, and Fig. 3 is a circuit diagram showing an example of a conventionally known security system. A block diagram showing another example of the security system, Fig. 4 is a circuit diagram showing an example of the loop resistance detection circuit shown in Fig. 3, and Fig. 5 is a circuit diagram showing another example of the loop resistance detection circuit shown in Fig. 3. FIG. 1...Loop resistance detection circuit, 2...Sensor, 4
, 8... Loop current detection section (resistance), 5, 9...
Amplifying section (transistor), 6, 10...Insulating section (
Photocoupler), 12...Late stage circuit (judgment circuit)
, 13...cable.
Claims (1)
ながら、前記ループ電流の値に基づいて監視対象
物の状態を検出してこの検出結果を出力するルー
プ抵抗検出回路において、前記ループ電流の値を
検出するループ電流検出部と、このループ電流検
出部の検出結果を増幅する増幅部と、この増幅部
の出力を後段回路に供給する絶縁部とを備えたこ
とを特徴とするループ抵抗検出回路。 The value of the loop current is detected in a loop resistance detection circuit that detects the state of the object to be monitored based on the value of the loop current and outputs the detection result while supplying the loop current to the sensor via the cable. 1. A loop resistance detection circuit comprising: a loop current detection section; an amplification section that amplifies the detection result of the loop current detection section; and an insulation section that supplies the output of the amplification section to a subsequent circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990108161U JP2586373Y2 (en) | 1990-10-16 | 1990-10-16 | Remote sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990108161U JP2586373Y2 (en) | 1990-10-16 | 1990-10-16 | Remote sensing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0464779U true JPH0464779U (en) | 1992-06-03 |
| JP2586373Y2 JP2586373Y2 (en) | 1998-12-02 |
Family
ID=31855000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990108161U Expired - Lifetime JP2586373Y2 (en) | 1990-10-16 | 1990-10-16 | Remote sensing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2586373Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01179281U (en) * | 1988-06-09 | 1989-12-22 |
-
1990
- 1990-10-16 JP JP1990108161U patent/JP2586373Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01179281U (en) * | 1988-06-09 | 1989-12-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2586373Y2 (en) | 1998-12-02 |