CN108776351A - A kind of radioactive source activity measurement well-type ionization chamber - Google Patents
A kind of radioactive source activity measurement well-type ionization chamber Download PDFInfo
- Publication number
- CN108776351A CN108776351A CN201810614732.8A CN201810614732A CN108776351A CN 108776351 A CN108776351 A CN 108776351A CN 201810614732 A CN201810614732 A CN 201810614732A CN 108776351 A CN108776351 A CN 108776351A
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- Prior art keywords
- bar
- ionization chamber
- radioactive source
- caliper
- activity measurement
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- 230000000694 effects Effects 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000001360 synchronised effect Effects 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
A kind of radioactive source activity measurement well-type ionization chamber, including outer housing, it is equipped with an inner housing arranged vertically at the center of outer housing, it is equipped with an inverted cone pedestal in the bottom of inner housing, it is equipped with an applicating device fixture at the top of inner housing, the centre of location of the applicating device fixture and the center of inverted cone pedestal are correspondingly arranged.The effect that the present invention passes through inverted cone pedestal and applicating device fixture so that applicating device is also at horizontal position center at the top of ionisation chamber, and plays fixed function to applicating device；Medium is water between inner wall and applicating device, and well-type ionization chamber is made no longer to be limited by sleeve, has universality, and the seamless contact ionization room of energy and applicating device, keeps result of calculation more acurrate；Ionisation chamber inner wall material is replaced, is allowed to have good absorbability to various radiation, more accurate measurement result can be obtained；Using rectangle clamp, the accuracy of centering is improved.
Description
Technical field：
The present invention relates to a kind of radioactive source activity measurement well-type ionization chambers.
Background technology：
Well-type ionization chamber used in radiation therapeutic machine radioactive source activity measurement is generally used import ionisation chamber, but is using
It is had the following problems in journey：1. acquisition cost is high, 2. ionization chamber interior walls are lead wall, though it is easy to process, neutron source is absorbed less,
3. placing sleeve in well-type ionization chamber, then applicating device is placed in sleeve, because the size of applicating device is different when use, is needed
A variety of sleeves are configured, and there are gaps between three, can not combine closely, 4. because use tube-in-tube structure, may in use
Because the reasons such as sleeve dimensions, shape change, make applicating device that can not occupy well-type ionization chamber center, cause applicating device to well
Type ionizes chamber interior walls each position distance difference, to influence the accuracy of measurement result.The prior art does not solve it to this
Plan.
Invention content：
The present invention provides a kind of radioactive source activity measurement well-type ionization chambers, and structure is reliable, solves in the prior art
There are the problem of.
Used technical solution is the present invention to solve above-mentioned technical problem：
A kind of radioactive source activity measurement well-type ionization chamber, including outer housing are equipped with a vertical cloth at the center of outer housing
The inner housing set, an inverted cone pedestal is equipped in the bottom of inner housing, and an applicating device fixture, institute are equipped at the top of inner housing
The centre of location and the center of inverted cone pedestal for stating applicating device fixture are correspondingly arranged.
Preferably, the material of the inner housing is organic glass, and collector is equipped in the middle part of the center outer surface of inner housing,
Graphite is coated on collector.
Preferably, it is equipped with the first protection pole in the top outer of inner housing, is equipped between the first protection pole and collector
Gap.
Preferably, it is equipped with the second protection pole in the lower outside of inner housing, is equipped between the second protection pole and collector
Gap.
Preferably, water is full of in inner housing.
Preferably, mounting hole is equipped on outer housing, the inner housing is installed in mounting hole.
Preferably, several concentric circles ladder platforms are equipped on inverted cone pedestal.
Preferably, the applicating device fixture includes clamp, and locating support is had in clamp, is equipped with extremely on locating support
The supporting leg of few 3 asymmetric settings, is equipped with the leg mounting hole being equipped with supporting leg on outer housing.
Preferably, including rectangle caliper, the side of caliper are connected with one end of several parallel guide bars, guide rod it is another
End and a cylinders, are movably equipped with a synchronous push plate on the guide rod between cylinder and caliper, the piston rod of cylinder with it is same
It walks and is connected in the middle part of push plate outside, synchronous push plate middle inside is located at the adjustment block phase in caliper by push rod across caliper with one
Even, it is equipped with the first vertical bar on push rod, first level bar is equipped in the first vertical bar, the upper surface of first level bar is tooth
Item is equipped on first level bar and engages the second connected horizon bar with first level bar, the other end activity of the second horizon bar
The other side across rectangle caliper relative to cylinder has second be oppositely arranged with the first vertical bar in the second horizon bar and erects
Straight-bar is equipped in the second vertical bar and is oppositely arranged with push rod with the vertically disposed auxiliary bar of the second vertical bar, auxiliary bar, synchronous push plate
Upper and lower ends are connected with power steering mechanism one end respectively, and two power steering mechanism are movably arranged on up and down the two of caliper respectively
Side, the two power steering mechanism other ends respectively be located at the upper jaw being oppositely arranged in caliper and lower jaw is connected；.
Preferably, the power steering mechanism includes a horizontal rack being vertically connected with synchronous push plate, horizontal rack with
The one discaling roll side Relative vertical engagement being actively installed in upper grip head or lower pliers head is connected, and the discaling roll other side and one is located at upper grip head
Or the vertical tooth rack Relative vertical engagement in lower pliers head is connected, vertical tooth rack and the upper jaw or lower jaw phase that are located in caliper
Even.
The present invention using the above structure, passes through the effect of inverted cone pedestal and applicating device fixture so that applicating device is in electricity
It is also at horizontal position center from ceiling portion, and fixed function is risen to applicating device；Medium is water between inner wall and applicating device, makes well
Type ionisation chamber is no longer limited by sleeve, is had universality, and the seamless contact ionization room of energy and applicating device, is kept result of calculation more accurate
Really；Ionisation chamber inner wall material is replaced, is allowed to have good absorbability to various radiation, can obtain more accurately measuring knot
Fruit；Using rectangle clamp, the accuracy of centering is improved.
Description of the drawings：
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of applicating device fixture.
In figure, 1, outer housing, 2, inner housing, 3, pedestal, 4, applicating device fixture, 5, collector, the 6, first protection pole, 7, the
Two protection poles, 8, supporting leg, 9, clamp, 10, caliper, 11, guide rod, 12, synchronous push plate, 13, adjustment block, 14, first level bar,
15, idler wheel, the 16, second horizon bar, 17, push rod, 18, auxiliary bar, 19, upper jaw, 20, lower jaw, 21, horizontal rack, 22, tooth
Roller, 23, vertical tooth rack, 24, applicating device, 25, cylinder.
Specific implementation mode：
In order to clarify the technical characteristics of the invention, below by specific implementation mode, and its attached drawing is combined, to this hair
It is bright to be described in detail.
As shown in Figs. 1-2, a kind of radioactive source activity measurement well-type ionization chamber, including outer housing 1, in outer housing 1
The heart is equipped with an inner housing 2 arranged vertically, an inverted cone pedestal 3 is equipped in the bottom of inner housing 2, at the top of inner housing 2
Equipped with an applicating device fixture 4, the centre of location of the applicating device fixture 4 and the center of inverted cone pedestal 3 are correspondingly arranged.
The material of the inner housing 2 is organic glass and hollow setting, is equipped with and receives in the middle part of the center outer surface of inner housing 2
Collector 5 is coated with graphite on collector 5.Such setting can promote ionisation chamber sensitivity, and it is right to reduce ionisation chamber collector 5
The sink effect of low energy X ray improves ionisation chamber energy response, so that (50-150) kV X-ray energy range interior energies is rung and improves
0.2%；It using hollow collector 5, can partly shorten the transition time of charge, increase and collect area, reduce coincidence loss pair
The influence of measurement, under 250V polarizing voltages, 1Gy/min dosage rate coincidence loss improves 0.3% or more.
It is equipped with the first protection pole 6 in the top outer of inner housing 2, between being equipped between the first protection pole 6 and collector 5
Gap.
It is equipped with the second protection pole 7 in the lower outside of inner housing 2, between being equipped between the second protection pole 7 and collector 5
Gap.The insulating properties of both sides is improved, leakage current is reduced as far as possible and the superposition of useful signal is interfered.
Water is full of in inner housing 2.Improve the accuracy of detection.
At least three asymmetric arrangement mounting holes are equipped on outer housing 1, the inner housing 2 is installed in mounting hole.It carries
Height centering performance.
Several concentric circles ladder platforms are equipped on inverted cone pedestal 3.So that bottom has self-centering effect, raising pair
The correctness of the heart.
The applicating device fixture 4 includes clamp 9, and locating support is had in clamp 9, and at least 3 are equipped on locating support
The supporting leg 8 of a asymmetric setting, the supporting leg 8 are correspondingly arranged with mounting hole.
The applicating device fixture 4 includes rectangle caliper 10, one end phase of the side of caliper 10 and several parallel guide bars 11
Even, the other end of guide rod 11 is connected with a cylinder 25, and one is movably equipped on the guide rod 11 between cylinder 25 and caliper 10
Synchronous push plate 12, the piston rod of cylinder 25 are connected with 12 outer middle side part of synchronous push plate, and synchronous 12 middle inside of push plate passes through push rod
17 are connected across caliper 10 with the adjustment block 13 that one is located in caliper 10, and the first vertical bar is equipped on push rod 17, perpendicular first
Straight-bar is equipped with first level bar 14, and the side of first level bar 14 is equipped with rack, is equipped with and the in 14 side of first level bar
The idler wheel 15 of one horizon bar 14 engagement setting, the second horizon bar 16 that setting is engaged with idler wheel 15, the second water are equipped in the other side
The other end activity of flat bar 16 passes through the other side of the caliper 10 relative to cylinder 25, has in the second horizon bar 16 and is erected with first
The second vertical bar that straight-bar is oppositely arranged is equipped with and the vertically disposed auxiliary bar 18 of the second vertical bar, auxiliary bar in the second vertical bar
18 are oppositely arranged with push rod 17, and synchronous 12 upper and lower ends of push plate are connected with power steering mechanism one end respectively, two power steers
Structure is movably arranged on the both sides up and down of caliper 10 respectively, the two power steering mechanism other ends respectively be located in caliper 10 opposite set
The upper jaw 19 set is connected with lower jaw 20.Improve the reliability of centering.Adjustment block can be used for local directed complete set.
The power steering mechanism includes a horizontal rack 21 being vertically connected with synchronous push plate 12, horizontal rack 21 and one
The 22 side Relative vertical engagement of discaling roll being actively installed in upper grip head or lower pliers head is connected, and 22 other side of discaling roll and one is located at pincers
23 Relative vertical of vertical tooth rack engagement in head or lower pliers head is connected, vertical tooth rack 23 and the upper jaw 19 that is located in caliper 10 or
Lower jaw 20 is connected.
In use, then applicating device 24 is put into inner housing 2, and outside line is connected, then will just apply source
Device fixture 4 is placed on outer housing 1, and using the relationship of supporting leg 8 and mounting hole, realizes the Primary Location for applicating device fixture 4,
Applicating device is in the lower section of applicating device fixture 4 at this time.Then using cylinder 25 is used, as power source, cylinder 25 is synchronized by driving
Push plate 12 moves, and synchronous push plate 12 drives four direction to synchronize movement, and self-centering is to pass through power steering mechanism up and down
It realizes, push rod side pushes directly on, and auxiliary bar side drives auxiliary bar 18 to move synchronously by idler wheel 15；In upper grip head, lower pliers head
Provided with steering mechanism, steering mechanism using rack, discaling roll 22, idler wheel 15 as medium, discaling roll 22 be both force application element and
Director element, since rack position is overlapped with clamping force, clamping force is big, securely and reliably；Upper jaw 19, lower jaw 20 and adjustment block
13 translational movements move, and displacement distance is strictly consistent, and clamping range is big, small, and the moving displacement of each jaw is by can
The consistency of moving displacement is realized in the transmission of the rack, discaling roll 22, idler wheel 15 that lean on, to realize 360 ° of self-centerings well.
Above-mentioned specific implementation mode cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or transformation made to embodiment of the present invention are all fallen in protection scope of the present invention.
Place is not described in detail by the present invention, is the known technology of those skilled in the art of the present technique.
Claims (10)
1. a kind of radioactive source activity measurement well-type ionization chamber, it is characterised in that：Including outer housing, it is equipped at the center of outer housing
One inner housing arranged vertically is equipped with an inverted cone pedestal in the bottom of inner housing, source is applied equipped with one at the top of inner housing
Device fixture, the centre of location of the applicating device fixture and the center of inverted cone pedestal are correspondingly arranged.
2. a kind of radioactive source activity measurement well-type ionization chamber according to claim 1, it is characterised in that：The inner housing
Material be organic glass and hollow setting, in the middle part of the center outer surface of inner housing be equipped with collector, coated on collector
There is graphite.
3. a kind of radioactive source activity measurement well-type ionization chamber according to claim 2, it is characterised in that：In inner housing
Top outer is equipped with the first protection pole, and gap is equipped between the first protection pole and collector.
4. a kind of radioactive source activity measurement well-type ionization chamber according to claim 2, it is characterised in that：In inner housing
Lower outside is equipped with the second protection pole, and gap is equipped between the second protection pole and collector.
5. a kind of radioactive source activity measurement well-type ionization chamber according to claim 1, it is characterised in that：In inner housing
Full of water.
6. a kind of radioactive source activity measurement well-type ionization chamber according to claim 1, it is characterised in that：On outer housing
Equipped at least three asymmetric arrangement mounting holes, the supporting leg is correspondingly arranged with mounting hole.
7. a kind of radioactive source activity measurement well-type ionization chamber according to claim 1, it is characterised in that：In inverted cone
Pedestal is equipped with several concentric circles ladder platforms.
8. a kind of radioactive source activity measurement well-type ionization chamber according to claim 6, it is characterised in that：The applicating device
Fixture includes clamp, and locating support is had in clamp, and the supporting leg of the asymmetric setting of at least three is equipped on locating support,
Outer housing is equipped with the leg mounting hole being equipped with supporting leg.
9. a kind of radioactive source activity measurement well-type ionization chamber according to claim 8, it is characterised in that：The applicating device
Fixture includes rectangle caliper, and the side of caliper is connected with one end of several parallel guide bars, the other end of guide rod and a cylinder
It is connected, a synchronous push plate, the piston rod of cylinder and synchronous push plate outside is movably equipped on the guide rod between cylinder and caliper
Middle part is connected, and synchronous push plate middle inside is connected by the adjustment block that push rod passes through caliper to be located in caliper with one, on push rod
Equipped with the first vertical bar, first level bar is equipped in the first vertical bar, the side of first level bar is equipped with rack, in the first water
Flat bar side portion is equipped with the idler wheel that setting is engaged with first level bar, and the second level that setting is engaged with idler wheel is equipped in the other side
The other end activity of bar, the second horizon bar passes through the other side of the caliper relative to cylinder, is had and first in the second horizon bar
The second vertical bar that vertical bar is oppositely arranged is equipped with and the vertically disposed auxiliary bar of the second vertical bar, auxiliary bar in the second vertical bar
It is oppositely arranged with push rod, synchronous push plate upper and lower ends are connected with power steering mechanism one end respectively, two power steering mechanism difference
Be movably arranged on the both sides up and down of caliper, the two power steering mechanism other ends respectively be located at the upper jaw being oppositely arranged in caliper
It is connected with lower jaw.
10. a kind of radioactive source activity measurement well-type ionization chamber according to claim 9, it is characterised in that：The power
Steering mechanism includes a horizontal rack being vertically connected with synchronous push plate, and horizontal rack and one is actively installed on upper grip head or lower pliers head
Interior discaling roll side Relative vertical engagement is connected, and the discaling roll other side is opposite with the vertical tooth rack that one is located in upper grip head or lower pliers head
Vertical Meshing is connected, and vertical tooth rack is connected with the upper jaw or lower jaw being located in caliper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614732.8A CN108776351A (en) | 2018-06-14 | 2018-06-14 | A kind of radioactive source activity measurement well-type ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614732.8A CN108776351A (en) | 2018-06-14 | 2018-06-14 | A kind of radioactive source activity measurement well-type ionization chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108776351A true CN108776351A (en) | 2018-11-09 |
Family
ID=64025169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810614732.8A Pending CN108776351A (en) | 2018-06-14 | 2018-06-14 | A kind of radioactive source activity measurement well-type ionization chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108776351A (en) |
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|---|---|---|---|---|
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| GB9116550D0 (en) * | 1991-04-05 | 1991-09-11 | Computalog Research Inc | Well logging radioactive detector assembly |
| US5095217A (en) * | 1990-10-17 | 1992-03-10 | Wisconsin Alumni Research Foundation | Well-type ionization chamber radiation detector for calibration of radioactive sources |
| CN2229970Y (en) * | 1995-06-21 | 1996-06-26 | 淄博市机械研究所 | Radioactivity type instrument placed in well for measuring well |
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| CN106001947A (en) * | 2016-05-26 | 2016-10-12 | 山东镭鸣数控激光装备有限公司 | Automatic centering clamp for laser pipe cutter |
| CN106653553A (en) * | 2017-03-06 | 2017-05-10 | 山东中测校准质控技术有限公司 | X-ray cylindrical protective ionization chamber with double collectors |
| CN208654338U (en) * | 2018-06-14 | 2019-03-26 | 山东中测校准质控技术有限公司 | A kind of radioactive source activity measurement well-type ionization chamber |
-
2018
- 2018-06-14 CN CN201810614732.8A patent/CN108776351A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3514603A (en) * | 1966-12-22 | 1970-05-26 | Johnson Service Co | Ionization chamber detection apparatus having a low voltage source means |
| US3775216A (en) * | 1967-03-31 | 1973-11-27 | Schlumberger Technology Corp | Neutron generating systems |
| US5095217A (en) * | 1990-10-17 | 1992-03-10 | Wisconsin Alumni Research Foundation | Well-type ionization chamber radiation detector for calibration of radioactive sources |
| GB9116550D0 (en) * | 1991-04-05 | 1991-09-11 | Computalog Research Inc | Well logging radioactive detector assembly |
| CN2229970Y (en) * | 1995-06-21 | 1996-06-26 | 淄博市机械研究所 | Radioactivity type instrument placed in well for measuring well |
| RU2189057C2 (en) * | 2000-11-13 | 2002-09-10 | Уральский государственный технический университет | Scintillation detector of neutron and gamma radiation |
| CN2684210Y (en) * | 2004-02-06 | 2005-03-09 | 北京清大科技股份有限公司 | High stabilizing end face ionization chamber |
| CN2702416Y (en) * | 2004-04-29 | 2005-05-25 | 杭州华源伽玛医疗设备投资有限公司 | Single row radioactive source in straight line arrangement for gamma ray irradiation unit |
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| CN103698795A (en) * | 2013-12-10 | 2014-04-02 | 广州医科大学附属肿瘤医院 | Irradiation dose detecting body mold for high-dose-rate short-range treatment radioactive source |
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| CN203773059U (en) * | 2014-04-10 | 2014-08-13 | 中国医学科学院北京协和医院 | Intracavity brachytherapy quality control mould body |
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