JPS5449180A - Watthour meter - Google Patents
Watthour meterInfo
- Publication number
- JPS5449180A JPS5449180A JP11591977A JP11591977A JPS5449180A JP S5449180 A JPS5449180 A JP S5449180A JP 11591977 A JP11591977 A JP 11591977A JP 11591977 A JP11591977 A JP 11591977A JP S5449180 A JPS5449180 A JP S5449180A
- Authority
- JP
- Japan
- Prior art keywords
- proportional
- counter
- pulse number
- converter
- analog
- 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
Abstract
PURPOSE: To realize electronic type watthour meter having a simple structure and a high precision by processing all signals except A-D converter digitally, without using analog constitution even in multiplication part so as to eliminate analog error.
CONSTITUTION: A voltage signal ev proportional to load voltage, and a voltage signal ei proportional to current consumption are fed into A-D converter 11 through an analog switch Sa which is selectively closed by sequence logic 10 to convert into a pulse number proportional to the signal level. A counter 12 is connected to v-contact side of logic switch Sb which cooperates with Sa, and pulse number Nv proportional to ev is counted at every A-D conversion. On the other hand, a rate- multiplier 13 is connected to i-contact side, and pulse number Ni of the converter 11 is sent into the multiplier 13 in which is set a pulse number Nv proportional to signal ev in parallel from the counter 12. These pulse numbers Nv, Ni are simultaneously sent into a subsequent up-down counter 14. This counter 14 integrates to obtain the electric energy
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11591977A JPS5449180A (en) | 1977-09-27 | 1977-09-27 | Watthour meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11591977A JPS5449180A (en) | 1977-09-27 | 1977-09-27 | Watthour meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5449180A true JPS5449180A (en) | 1979-04-18 |
Family
ID=14674449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11591977A Pending JPS5449180A (en) | 1977-09-27 | 1977-09-27 | Watthour meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5449180A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5262068A (en) * | 1975-11-17 | 1977-05-23 | Toshiba Corp | Electronic watthour meter |
-
1977
- 1977-09-27 JP JP11591977A patent/JPS5449180A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5262068A (en) * | 1975-11-17 | 1977-05-23 | Toshiba Corp | Electronic watthour meter |
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