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 unitInfo
- 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
Links
Landscapes
- 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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014182879A (en) * | 2013-03-18 | 2014-09-29 | Shimadzu Corp | Fluoroscopic apparatus |
-
1978
- 1978-04-12 JP JP4343878A patent/JPS54134996A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014182879A (en) * | 2013-03-18 | 2014-09-29 | Shimadzu Corp | Fluoroscopic apparatus |
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