CN202471024U - Adjustable high-precision X-ray thickness meter - Google Patents
Adjustable high-precision X-ray thickness meter Download PDFInfo
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- CN202471024U CN202471024U CN201220002653XU CN201220002653U CN202471024U CN 202471024 U CN202471024 U CN 202471024U CN 201220002653X U CN201220002653X U CN 201220002653XU CN 201220002653 U CN201220002653 U CN 201220002653U CN 202471024 U CN202471024 U CN 202471024U
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Abstract
An adjustable high-precision X-ray thickness meter is provided. When an X-ray tube is working, a filament is powered on and heated to a certain temperature, then abundant hot electrons are generated, most energy of an electron beam can be converted into heat energy because of a bombardment target surface, the conversion rate of X-ray is less than 1%, thus the X-ray tube must be cooled when working, thus a cathode can be prevented from being heated, melted and damaged. An adjustable high-precision X-ray thickness meter comprises a connecting rack (1), one end of the connecting rack is connected with an X-ray emission device (3) of the high-performance X-ray tube (2), and the other end of the connecting rack is connected with an X-ray receiving device (5) provided with an X-ray receiving ionization chamber (14). The meter is used for measuring thickness of bands through X-ray.
Description
Technical field:
the utility model relates to a kind of radionetric survey field, is specifically related to a kind of scalable high precision X-ray thickness gauge.
Background technology:
It is early stage that research of
thicknessmeter and application start from the fifties in last century, mainly utilizes two-beam photo-detector receiving optical signals to measure.In the later stage seventies, then mainly adopt single beam detector thickness measurement technology.The eighties, the nuclear physics technology was fast-developing and increasingly mature; Use transformation from military applications to civilian industry; According to the principle of ray and matter interaction, nuclear technology aspects such as subject, industry, agricultural and medical science on the edge of all is widely used, and isotopic thickness gauge arises at the historic moment.
The thicknessmeter that industries such as
present domestic papermaking, plastic sheeting, nonwoven fabrics, board materials production are used is isotopic thickness gauge more than 95%.Along with happening occasionally of radioactive sources lost and leakage accident in recent years, the Fukushima, Japan nuclear power station leakage accident that takes place especially in the recent period makes People more and more clearly realize that radioisotopic drawback, and denuclearization becomes the general orientation of isotope gauge development.
ray possesses all advantages of radioactive isotope, but than radioactive source safety many, therefore be the good substitute of radioactive isotope.What at present X ray was used is very extensive, and for example: medical science perspective, X ray are micro-, industry CT, x-ray inspection or the like.China is led in the application of developed countries such as America and Europe aspect X ray; For example the Spellman company of the U.S. is the major company of professional production X-ray apparatus; They have had very ripe X-ray ga(u)ging technology; What China many thickness measurings producer used at present all is the import X-ray thickness gauge, and price all compares expensive.
in recent years, along with the raising of homemade X-ray tube performance and the maturation of extra-high voltage source technology, the research of domestic X-ray ga(u)ging aspect also gradually the starting.But there is a big difference than going back with the external instrument of producing at aspects such as performance and technologies for instrument.The research of X-ray ga(u)ging aspect at present also just rests on the trial period at initial stage, and therefore, sizable home market is captured by developed countries such as America and Europes.
ray tube is when work; Filament is energized and is heated to uniform temperature and just can produces a large amount of thermoelectrons, adds the bombardment target surface again, and most energy of electron beam all are converted into heat energy; The conversion ratio of X ray is only less than 1%; So X-ray tube must cool off when work, in order to avoid negative electrode is heated to fusing, is damaged.
When the X ray of
continuum sees through the absorbing material of different-thickness; Increase along with absorbing material thickness; Not only the total intensity of X ray can reduce; And mean wavelength moves to short direction, and just the shared ratio of high energy particle strengthens, and this is because the absorbable cause of low energy particle.
traditional ionization chamber mostly adopts the mode of adhesive sealing, very easily damaged gas leakage under the environment condition of severe at the scene.
The utility model content:
The purpose of
the utility model provide a kind of ray controlled, be prone to protection, scalable high precision X-ray thickness gauge that energy range is adjustable.
Above-mentioned purpose realizes through following technical scheme:
a kind of scalable high precision X-ray thickness gauge; Its composition comprises: link; Described link one end connects the X ray emitter with High Performance X-ray pipe, and the described link other end connects the X ray receiving trap with high pressure magnification circuit plate.
described scalable high precision X-ray thickness gauge; Described X ray emitter comprises outer case, and harness has the adjustable high voltage power supply of high-voltage output end in the described outer case, and described high-voltage output end connects the high voltage input terminal of X-ray tube through lead; The high voltage input terminal of described X-ray tube is contained on the X-ray tube; Described X-ray tube is contained in the described outer case, and described outer case top has emitter window, and described outer case bottom has the externally fed air plug; Described externally fed air plug connects described adjustable high voltage power supply, described externally fed air plug by the outside provide+24V is to high-voltage power supply.
described scalable high precision X-ray thickness gauge; Described X ray receiving trap comprises the aluminium casing; Ionization chamber screen fraud bucket is housed in the described aluminium casing, has ionization chamber in the described ionization chamber screen fraud bucket, described ionization chamber connects the high pressure magnification circuit plate; Described high pressure magnification circuit plate connects low pressure externally fed air plug through lead, and described aluminium bottom half has receiver window.
described scalable high precision X-ray thickness gauge; Described high-voltage power supply receives PC control, and described high-voltage power supply is given the filament high-voltage power supply, and described filament is contained in x ray generator inside; Described x ray generator connects X hardening of spectrum device; X ray is transmitted to X ray through described X hardening of spectrum device and accepts ionization chamber, and described X ray is accepted ionization chamber and connected pre-amplification circuit, and described pre-amplification circuit connects described host computer.
Beneficial effect:
The metering system that traditional application of radiation source penetrates measured object has been broken through in
1. the utility model, utilizes controlled X-ray generator to receive ionization chamber with special-purpose X ray and measures the thickness of strip on the production line, measures accurately.
The thicknessmeter of
the utility model have ray controlled, be prone to protection, energy range is adjustable, measuring accuracy is high, long service life, maintenance are simple.
the utility model market share probably accounts for 80% of the whole nation; The successful development of scalable high precision X-ray thickness gauge is weeded out the old and bring forth the new our thickness measure product, and variation makes our product have the market competitiveness more, thereby wins the more market share more.
The High Performance X-ray pipe that
the utility model adopts is W elements as the filament target in the ray generating means; The X ray spectrum that is produced is continuous spectrum; In the middle of 1mm ~ 40mm, can realize that the X ray energy range is adjustable at 0～70KeV according to multiple materials such as the difference of measuring object such as paper, plastic sheeting, nonwoven fabrics, aluminium sheet and measured object thickness.
The scalable high-voltage power supply that
the utility model adopts and the effect of the high-voltage power supply in the filament supply are to produce high pressure, thereby between the ray tube anode and cathode, form electric potential difference, produce X ray; Supply with direct current 24V voltage transitions through the outside and become adjustable 0～10KV high pressure; Stability and a high-precision filament supply regulating circuit of X ray have been guaranteed, to stablize the size of electron beam.
The generation of the X ray of
the utility model is mainly by the decision of tube voltage and tube current, with tube voltage cube or square and tube current be directly proportional; If be converted on the thickness, for the fluctuation of tube voltage, to increase 4～10 times, to increase 1～4 times for the fluctuation of tube current; So require the X ray driver that very high stability is arranged.
the utility model becomes direct current to the voltage commutation that is added on the X-ray tube, detects and control this voltage, adopts high pressure to survey feedback, thereby has reached high stability; High tension voltage, high-tension current, filament current is realized stepless adjustment through variable resistor, makes ray tube adjust working environment according to the requirement of reality, has prolonged the ray tube life-span and has guaranteed measuring accuracy; The elementary employing high frequency pumping of high pressure transformation makes control high speed and external form compact; Adopt the voltage detecting resistance and the low drifting operating amplifier of high stability.
The cooling device of
the utility model is with heat-conduction epoxy resin ray tube to be wrapped up, and outside epoxy resin, installs certain thickness aluminium alloy radiating block again additional and can play the radiation protection effect.
The X ray that X-ray tube in
the employed X hardening of spectrum of the utility model device produces not is the monoenergetic X ray, but the continuous X-rays of wide power spectrum have been considered the sclerosis of power spectrum; Through absorption experiment, before the X-ray tube launch window, add the low energy filter disc of different-thickness and the purpose that the collimation grid have reached the cure process of X power spectrum to different material.
The ionization chamber of the thicknessmeter that
the utility model adopts is as ray detector; Its sensitivity is higher, is fit to online Testing requirement, high-performance sealing ionization chamber; Adopt brand-new sealing technology; Characteristic with high-temperature-resistant and anti-corrosion, longer than the gluing better life-span of ionization chamber performance of tradition, more can adapt to on-the-spot rugged surroundings.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is the structural representation of X ray emitter in the accompanying drawing 1.
accompanying drawing 3 is the fundamental diagram schematic diagram of this product.
accompanying drawing 4 is this thickness of product measuring principle figure.
accompanying drawing 5 is the integrating amplification circuit figure of this product.
Embodiment:
Embodiment 1:
a kind of scalable high precision X-ray thickness gauge; Its composition comprises: link 1; Described link one end connects the X ray emitter 3 with High Performance X-ray pipe 2, and the described link other end connects the X ray receiving trap 5 with x ray ionization chamber 14.
Embodiment 2:
Embodiment 4:
Embodiment 4:
Embodiment 5:
The method of
a kind of scalable high precision X-ray thickness gauge becomes direct current to the voltage commutation that is added on the X-ray tube, detects and control this voltage, adopts high pressure to survey feedback; High tension voltage, high-tension current, filament current is realized stepless adjustment through variable resistor, ray tube is adjusted working environment according to the requirement of reality; The elementary employing high frequency pumping of high pressure transformation, compact in order to control high speed and external form; Adopt the voltage detecting resistance and the low drifting operating amplifier of high stability.
Embodiment 6:
The method of
embodiment 5 described scalable high precision X-ray thickness gauges; Described preposition integrating amplification circuit because the signal that ionization chamber is gathered is very faint, directly takes out signal from ionization chamber at signal input part by high resistant; And entering integrating amplification circuit; The AD549 that the selection of integration chip has low temperature drift, high stability, integrating circuit adopts dual power supply, near the power access end chip, all takes corresponding filtering measure; On amplifying circuit, also adopt the various feedback mode to come stabilizing circuit, eliminate and disturb.
Embodiment 7:
the foregoing description 1 described scalable high precision X-ray thickness gauge utilizes wavelength is short, energy is big X ray to see through decay that testee produces and measures strip material thickness with the principle that the thickness of testee is directly proportional.The instrument of processing by this principle is an X-ray thickness gauge, is used for the on-line measurement of strip material.The x gamma thickness gage is through the voltage of adjustment X-ray tube; Select the X ray energy, just can be adapted to various measured matters.
Embodiment 8:
The described scalable high precision of the foregoing description X-ray thickness gauge,
Measured material has following relation to the ability of x radiation absorption with the thickness of material:
I=I0e-λd
I is the transmitted intensity after the ray penetrable material in
formula; I0 is the ray green strength; λ is an attenuation coefficient, depends on material; D is a measured material thickness.Visible by following formula, ray by the index law decay, when λ is known, is measured I and I0 and just can be confirmed material thickness d during through measured material.
Claims (4)
1. scalable high precision X-ray thickness gauge; Its composition comprises: link; It is characterized in that: described link one end connects the X ray emitter with High Performance X-ray pipe, and the described link other end connects the X ray receiving trap with high pressure magnification circuit plate.
2. scalable high precision X-ray thickness gauge according to claim 1; It is characterized in that: described X ray emitter comprises outer case, and harness has the adjustable high voltage power supply of high-voltage output end in the described outer case, and described high-voltage output end connects the high voltage input terminal of X-ray tube through lead; The high voltage input terminal of described X-ray tube is contained on the X-ray tube; Described X-ray tube is contained in the described outer case, and described outer case top has emitter window, and described outer case bottom has the externally fed air plug; Described externally fed air plug connects described adjustable high voltage power supply, described externally fed air plug by the outside provide+24V is to high-voltage power supply.
3. scalable high precision X-ray thickness gauge according to claim 1 and 2; It is characterized in that: described X ray receiving trap comprises the aluminium casing; Ionization chamber screen fraud bucket is housed in the described aluminium casing, has ionization chamber in the described ionization chamber screen fraud bucket, described ionization chamber connects the high pressure magnification circuit plate; Described high pressure magnification circuit plate connects low pressure externally fed air plug through lead, and described aluminium bottom half has receiver window.
4. scalable high precision X-ray thickness gauge according to claim 2; It is characterized in that: described high-voltage power supply receives PC control; Described high-voltage power supply is given the filament high-voltage power supply; Described filament is contained in x ray generator inside, and described x ray generator connects X hardening of spectrum device, and X ray is transmitted to X ray through described X hardening of spectrum device and accepts ionization chamber; Described X ray is accepted ionization chamber and is connected pre-amplification circuit, and described pre-amplification circuit connects described host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220002653XU CN202471024U (en) | 2012-01-05 | 2012-01-05 | Adjustable high-precision X-ray thickness meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220002653XU CN202471024U (en) | 2012-01-05 | 2012-01-05 | Adjustable high-precision X-ray thickness meter |
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| Publication Number | Publication Date |
|---|---|
| CN202471024U true CN202471024U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220002653XU Expired - Fee Related CN202471024U (en) | 2012-01-05 | 2012-01-05 | Adjustable high-precision X-ray thickness meter |
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| CN (1) | CN202471024U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607476A (en) * | 2012-01-05 | 2012-07-25 | 黑龙江省科学院技术物理研究所 | Adjustable high-precision X-ray thickness gauge and adjustable high-precision X-ray testing method |
| CN105526888B (en) * | 2015-11-30 | 2018-06-19 | 广东核生科技有限公司 | Thickness measuring method and thickness measuring system |
-
2012
- 2012-01-05 CN CN201220002653XU patent/CN202471024U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607476A (en) * | 2012-01-05 | 2012-07-25 | 黑龙江省科学院技术物理研究所 | Adjustable high-precision X-ray thickness gauge and adjustable high-precision X-ray testing method |
| CN102607476B (en) * | 2012-01-05 | 2016-07-13 | 黑龙江省科学院技术物理研究所 | Adjustable high-precision X-ray thickness gauge and method of testing |
| CN105526888B (en) * | 2015-11-30 | 2018-06-19 | 广东核生科技有限公司 | Thickness measuring method and thickness measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20140105 |