JPS567101A - Process control system - Google Patents
Process control systemInfo
- Publication number
- JPS567101A JPS567101A JP8166279A JP8166279A JPS567101A JP S567101 A JPS567101 A JP S567101A JP 8166279 A JP8166279 A JP 8166279A JP 8166279 A JP8166279 A JP 8166279A JP S567101 A JPS567101 A JP S567101A
- Authority
- JP
- Japan
- Prior art keywords
- pulse duration
- signals
- actuator
- types
- gauge
- 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
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Feedback Control In General (AREA)
- Programmable Controllers (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To realize a low-cost instrumentation which is free from the transmission delay of the signal and with omission of the countermeasures for the essential safe antiexplosion and the noise, by transmitting the output signals sent from the process adjustment gauge to the actuator in the form of the optical signals of two types of pulse duration signals. CONSTITUTION:The output signal is delivered from process adjustment gauge 1 in the form of the difference of the pulse duration between the two types of pulse duration signals. And these two types of pulse duration signals are transmitted to actuator 3 installed at the site in the form of the optical signals and via optical fiber transmission line 2. At actuator 3, the red and green optical signals transmitted from gauge 1 are selected through filters 31 and 32 each to be received at photodiodes 41 and 42. The current corresponding to the pulse duration of the received light flows at diodes 41 and 42 each. Thus output signal (er) of the parallel diode circuit, i.e. the current flowing to force motor 51 becomes to the current which corresponds to the difference of the pulse duration of the two pulse duration signals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8166279A JPS567101A (en) | 1979-06-28 | 1979-06-28 | Process control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8166279A JPS567101A (en) | 1979-06-28 | 1979-06-28 | Process control system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS567101A true JPS567101A (en) | 1981-01-24 |
JPS624721B2 JPS624721B2 (en) | 1987-01-31 |
Family
ID=13752532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8166279A Granted JPS567101A (en) | 1979-06-28 | 1979-06-28 | Process control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS567101A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57169801A (en) * | 1981-03-25 | 1982-10-19 | United Technologies Corp | Optical digital servo controller |
JPS5824909A (en) * | 1981-07-06 | 1983-02-15 | ダナ・コ−パレイシヤン | Operation rod controller, pressure build-up valve driver and fluid pressure controller |
JPS58163016A (en) * | 1982-03-23 | 1983-09-27 | Stanley Electric Co Ltd | Optical load controller |
JPS59109998A (en) * | 1982-12-15 | 1984-06-25 | 横河電機株式会社 | Photoresponder |
JPS59109999A (en) * | 1982-12-15 | 1984-06-25 | 横河電機株式会社 | Photoresponder |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0360314U (en) * | 1989-10-18 | 1991-06-13 | ||
JPH0571816U (en) * | 1992-02-28 | 1993-09-28 | 株式会社村井 | Eyeglass temple |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49103086A (en) * | 1973-02-08 | 1974-09-28 | ||
JPS5352142A (en) * | 1976-10-22 | 1978-05-12 | Nec Corp | Data collection system by optical fiber cables |
-
1979
- 1979-06-28 JP JP8166279A patent/JPS567101A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49103086A (en) * | 1973-02-08 | 1974-09-28 | ||
JPS5352142A (en) * | 1976-10-22 | 1978-05-12 | Nec Corp | Data collection system by optical fiber cables |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57169801A (en) * | 1981-03-25 | 1982-10-19 | United Technologies Corp | Optical digital servo controller |
JPS5824909A (en) * | 1981-07-06 | 1983-02-15 | ダナ・コ−パレイシヤン | Operation rod controller, pressure build-up valve driver and fluid pressure controller |
JPS58163016A (en) * | 1982-03-23 | 1983-09-27 | Stanley Electric Co Ltd | Optical load controller |
JPH0440726B2 (en) * | 1982-03-23 | 1992-07-06 | Stanley Electric Co Ltd | |
JPS59109998A (en) * | 1982-12-15 | 1984-06-25 | 横河電機株式会社 | Photoresponder |
JPS59109999A (en) * | 1982-12-15 | 1984-06-25 | 横河電機株式会社 | Photoresponder |
JPH035638B2 (en) * | 1982-12-15 | 1991-01-28 | Yokogawa Electric Corp | |
JPH035639B2 (en) * | 1982-12-15 | 1991-01-28 | Yokogawa Electric Corp |
Also Published As
Publication number | Publication date |
---|---|
JPS624721B2 (en) | 1987-01-31 |
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