JPS54123978A - Selection measuring apparatus - Google Patents
Selection measuring apparatusInfo
- Publication number
- JPS54123978A JPS54123978A JP3128178A JP3128178A JPS54123978A JP S54123978 A JPS54123978 A JP S54123978A JP 3128178 A JP3128178 A JP 3128178A JP 3128178 A JP3128178 A JP 3128178A JP S54123978 A JPS54123978 A JP S54123978A
- Authority
- JP
- Japan
- Prior art keywords
- quantities
- supplied
- measurement
- thru
- transducer
- 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
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To eliminate the need for any transducer and achieve lower cost and higher reliability by extracting the quantities being measured and performing maximum value detection through insulating transformers in measurement of the quantities of AC electricity.
CONSTITUTION: The quantities of AC electricities being measured 1a thru 1n are extracted with insulating transformers 3a thru 3n and are supplied to a measurement selecting circuit 4, the outputs selected by which are then 90° phase shifted 5 and are detected 6 of zero point, after which they are supplied as clock pulses to a sample holding circuit 7. Hence, the selected outputs are sample held 7 in the position of maximum values of their instantaneous values, thence they are supplied to a data processing unit 9 after having been A/D converted 8. As a result, data measurement is accomplished without using any transducer.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3128178A JPS54123978A (en) | 1978-03-17 | 1978-03-17 | Selection measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3128178A JPS54123978A (en) | 1978-03-17 | 1978-03-17 | Selection measuring apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54123978A true JPS54123978A (en) | 1979-09-26 |
JPS641746B2 JPS641746B2 (en) | 1989-01-12 |
Family
ID=12326926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3128178A Granted JPS54123978A (en) | 1978-03-17 | 1978-03-17 | Selection measuring apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54123978A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61266963A (en) * | 1985-05-21 | 1986-11-26 | Horiba Ltd | Rectifying circuit |
JPS62162970A (en) * | 1986-01-13 | 1987-07-18 | Nippon Denso Co Ltd | Output device for alternating current signal varying in amplitude |
DE10135924B4 (en) * | 2000-07-25 | 2014-03-13 | Mitutoyo Corp. | Amplitude detection method and circuit |
-
1978
- 1978-03-17 JP JP3128178A patent/JPS54123978A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61266963A (en) * | 1985-05-21 | 1986-11-26 | Horiba Ltd | Rectifying circuit |
JPS62162970A (en) * | 1986-01-13 | 1987-07-18 | Nippon Denso Co Ltd | Output device for alternating current signal varying in amplitude |
DE10135924B4 (en) * | 2000-07-25 | 2014-03-13 | Mitutoyo Corp. | Amplitude detection method and circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS641746B2 (en) | 1989-01-12 |
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