JPS54134996A - Preventive device for x-ray overload of x-ray motion-picture pickup unit - Google Patents

Preventive device for x-ray overload of x-ray motion-picture pickup unit

Info

Publication number
JPS54134996A
JPS54134996A JP4343878A JP4343878A JPS54134996A JP S54134996 A JPS54134996 A JP S54134996A JP 4343878 A JP4343878 A JP 4343878A JP 4343878 A JP4343878 A JP 4343878A JP S54134996 A JPS54134996 A JP S54134996A
Authority
JP
Japan
Prior art keywords
pulse
current
ray
tube
value
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
JP4343878A
Other languages
Japanese (ja)
Inventor
Yasuyoshi Doi
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.)
Shimadzu Corp
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP4343878A priority Critical patent/JPS54134996A/en
Publication of JPS54134996A publication Critical patent/JPS54134996A/en
Pending legal-status Critical Current

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  • X-Ray Techniques (AREA)

Abstract

PURPOSE: To prevent an overload upon a X-ray tube by detecting a pulse current flowing to the X-ray tube and by comparing it with a set-value signal in a X-ray unit applying pulse X-rays.
CONSTITUTION: Mean-value output circuit 16 for pulsatory tube currents consists of capacitor C1 and resistance RL1, mean value Ipm of pulse current Ip obtained by full-wave-rectitying 14 secondary AC current IPA of high-tension transformer 2 flows to resistance RL1, and its output voltage Vm is inputted to the positive terminal of comparing amplifier 17. This Vm becomes detection signal Sm as to all of the current value, pulse width and pulse number of pulsatory tube current I of X-ray tube 9. Output voltage Vs of voltage-division contacts 18, 19 and 20 interlocking with tube-current setter 5, pulse-number setter 11 and pulse-width setter 9 respectively, on the other hand, is inputted to one terminal of comparing amplifier 17 as pulse-current setting signal Ss. If the tube current I exceeds its permissible value, transistor 22 is turned ON to operate relay RY and, in consequence, contact 23 is broken to release the primary circuit of transformer 2.
COPYRIGHT: (C)1979,JPO&Japio
JP4343878A 1978-04-12 1978-04-12 Preventive device for x-ray overload of x-ray motion-picture pickup unit Pending JPS54134996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4343878A JPS54134996A (en) 1978-04-12 1978-04-12 Preventive device for x-ray overload of x-ray motion-picture pickup unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4343878A JPS54134996A (en) 1978-04-12 1978-04-12 Preventive device for x-ray overload of x-ray motion-picture pickup unit

Publications (1)

Publication Number Publication Date
JPS54134996A true JPS54134996A (en) 1979-10-19

Family

ID=12663693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4343878A Pending JPS54134996A (en) 1978-04-12 1978-04-12 Preventive device for x-ray overload of x-ray motion-picture pickup unit

Country Status (1)

Country Link
JP (1) JPS54134996A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014182879A (en) * 2013-03-18 2014-09-29 Shimadzu Corp Fluoroscopic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014182879A (en) * 2013-03-18 2014-09-29 Shimadzu Corp Fluoroscopic apparatus

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