JPS645524A - Endoscopic apparatus - Google Patents

Endoscopic apparatus

Info

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
Application number
JP62159663A
Other languages
Japanese (ja)
Inventor
Yasuo Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP62159663A priority Critical patent/JPS645524A/en
Publication of JPS645524A publication Critical patent/JPS645524A/en
Pending legal-status Critical Current

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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.
JP62159663A 1987-06-29 1987-06-29 Endoscopic apparatus Pending JPS645524A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008086156A (en) * 2006-09-28 2008-04-10 Mitsubishi Electric Corp Filter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
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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