JPS645524A - Endoscopic apparatus - Google Patents
Endoscopic apparatusInfo
- Publication number
- JPS645524A JPS645524A JP62159663A JP15966387A JPS645524A JP S645524 A JPS645524 A JP S645524A JP 62159663 A JP62159663 A JP 62159663A JP 15966387 A JP15966387 A JP 15966387A JP S645524 A JPS645524 A JP S645524A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- rate
- thinning
- air feed
- frequency
- 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
Landscapes
- Endoscopes (AREA)
Abstract
PURPOSE:To control an air feed amount in a multistage fashion without generating noise and to simplify constitution, by setting a thinning-out rate in the definite repeating cycle corresponding to the frequency of a power source and subjecting the output of the drive power source of an air feed pump to zero cross switching according to the set value. CONSTITUTION:The frequency of a commercial power source 4 is detected by a power source frequency detection part 7 and a thinning-out rate is set with respect to the output rate of the commercial power source 4 in the definite repeating cycle corresponding to the detected power source frequency and the output of the commercial power source 4 is subjected to zero cross switching on the basis of the set thinning-out rate by a zero cross type semiconductor switch 5. Ten stages wherein a thinning rate of 100-0% and an operating rate of 0-100% are inversely proportional to each other are set by an air feed rate control part 6. For example, when the thinning-out rate is set to 40%, the fifth control stage is specified and, by the operating rate of 40% whereat No.1, 2, 4, 6, 7 and 9 of power source cycles become operating cycles and No.3, 5, 8 and 10 becomes stop cycles due to thinning-out, the control of an air feed amount is performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62159663A JPS645524A (en) | 1987-06-29 | 1987-06-29 | Endoscopic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62159663A JPS645524A (en) | 1987-06-29 | 1987-06-29 | Endoscopic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645524A true JPS645524A (en) | 1989-01-10 |
Family
ID=15698621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62159663A Pending JPS645524A (en) | 1987-06-29 | 1987-06-29 | Endoscopic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645524A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008086156A (en) * | 2006-09-28 | 2008-04-10 | Mitsubishi Electric Corp | Filter circuit |
-
1987
- 1987-06-29 JP JP62159663A patent/JPS645524A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008086156A (en) * | 2006-09-28 | 2008-04-10 | Mitsubishi Electric Corp | Filter circuit |
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