JPS5483866A - Level detector - Google Patents
Level detectorInfo
- Publication number
- JPS5483866A JPS5483866A JP15208177A JP15208177A JPS5483866A JP S5483866 A JPS5483866 A JP S5483866A JP 15208177 A JP15208177 A JP 15208177A JP 15208177 A JP15208177 A JP 15208177A JP S5483866 A JPS5483866 A JP S5483866A
- Authority
- JP
- Japan
- Prior art keywords
- level
- signals
- input
- generates
- converter
- 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
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE: To make it possible to accurately detect the level even for a low input by using two square wave converters, which are operative to generate signals in accordance with the level an laternate input electricity, and two timers thereby to effect the direct conversion of the square waves without rectifying the input.
CONSTITUTION: A square wave converter 7 generates signals at level 1, when the level of the positive half wave of an input waveform Vi is higher than a reference level VL1, and singals at level 0 when the former is lower than the latter. A square wave converter 8 generates signals at 1, when the level of the negative half wave of the input waveform Vi is lower than reference level VL2, and signals at level 0 when the former is higher than the latter. A timer 9 judges the time, for which the output of the converter 7 generates the signals at level 1, whereas a timer 10 judges the time, for which the converter 8 generates the signals at level 1. By judging the time for which the outputs of the both timers 9 and 10 are the signals at level 0, it is possible to accurately detect the level even for a low input without responding to the high frequency input higher than a preset frequency.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52152081A JPS5825233B2 (en) | 1977-12-16 | 1977-12-16 | level detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52152081A JPS5825233B2 (en) | 1977-12-16 | 1977-12-16 | level detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5483866A true JPS5483866A (en) | 1979-07-04 |
JPS5825233B2 JPS5825233B2 (en) | 1983-05-26 |
Family
ID=15532627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52152081A Expired JPS5825233B2 (en) | 1977-12-16 | 1977-12-16 | level detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5825233B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644345A (en) * | 1979-09-17 | 1981-04-23 | Tokyo Shibaura Electric Co | Distance relay |
JPS59109228U (en) * | 1983-01-13 | 1984-07-23 | 三菱電機株式会社 | protective relay |
US5019995A (en) * | 1987-08-19 | 1991-05-28 | Fanuc Ltd. | Input signal discrimination method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5910693B1 (en) * | 2014-09-30 | 2016-04-27 | オムロン株式会社 | Power failure detection circuit |
-
1977
- 1977-12-16 JP JP52152081A patent/JPS5825233B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644345A (en) * | 1979-09-17 | 1981-04-23 | Tokyo Shibaura Electric Co | Distance relay |
JPS59109228U (en) * | 1983-01-13 | 1984-07-23 | 三菱電機株式会社 | protective relay |
US5019995A (en) * | 1987-08-19 | 1991-05-28 | Fanuc Ltd. | Input signal discrimination method |
Also Published As
Publication number | Publication date |
---|---|
JPS5825233B2 (en) | 1983-05-26 |
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