CN103096609A - Portable variable-frequency X fluorescent light source - Google Patents
Portable variable-frequency X fluorescent light source Download PDFInfo
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- CN103096609A CN103096609A CN2012105558689A CN201210555868A CN103096609A CN 103096609 A CN103096609 A CN 103096609A CN 2012105558689 A CN2012105558689 A CN 2012105558689A CN 201210555868 A CN201210555868 A CN 201210555868A CN 103096609 A CN103096609 A CN 103096609A
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Abstract
A portable variable-frequency X fluorescent light source comprises a high-voltage contravariant unit, a primary voltage boosting unit, a high-voltage contravariant impulse oscillating control unit, a voltage-multiplying rectification unit, a high-voltage measurement unit, a lamp filament contravariant unit, an X-ray tube, a voltage reduction unit, a beam current measurement unit and a lamp filament contravariant impulse oscillating control unit. The high-voltage contravariant unit is connected with the primary voltage boosting unit, the voltage-multiplying rectification unit, the X-ray tube, the voltage reduction unit and the lamp filament contravariant unit in sequence. According to the portable variable-frequency X fluorescent light source, due to the fact that controlled silicon Q1 is adopted as a core component of the high-voltage contravariant unit, a high-voltage power supply is enabled to be high in stability, wide in application range and high in efficiency during work. The high-voltage contravariant impulse oscillating control unit is capable of changing working frequency of the whole circuit, enabling the circuit to be in a high-frequency state when the circuit works and being free of noise by using a frequency conversion function of TL 494. The portable variable-frequency X fluorescent light source has the advantages of being small in size, light in weight, convenient to install and maintain, capable of obtaining materials conveniently, low in cost, and convenient to carry and transport.
Description
Technical field: the present invention relates to a kind of X-fluorescence source, especially a kind of Portable frequency converting X-fluorescence source belongs to the x radiation x technical field.
Background technology: the power-supply system of traditional X-ray ray machine generally adopts the power frequency technology, and frequency is approximately 50Hz or 60Hz, is called again low frequency or power frequency X-ray machine.This X-ray machine autotransformer volume is large, and complete machine is heavier, and intelligent level is lower, and inconvenience operates.After the eighties in 20th century, the medium-high frequency X-ray machine has appearred, the operating frequency of the high voltage source of this class X-ray machine and X-ray tube filament heating power supply is no longer power frequency 50/60Hz, but 400Hz to 20kHz, the change of X-ray machine operating frequency has brought qualitative leap on structure and performance, makes modern scientific and technical result be able to extensive use in X-ray machine.
Summary of the invention: for above-mentioned the deficiencies in the prior art, the invention provides a kind of volume little, be convenient for carrying transportation, and working stability, the Portable frequency converting X-fluorescence source that cost is low.
For achieving the above object, the technical solution used in the present invention is: Portable frequency converting X-fluorescence source comprises high-voltage inverted unit, boosting unit, high-voltage inverted impulse hunting control unit, voltage multiplying rectifier unit, high-tension measurement unit, filament inversion unit, X-ray tube, pressure unit, beam current measurement unit, filament inversion pulse oscillating control unit.High-voltage inverted unit connects boosting unit, voltage multiplying rectifier unit, X-ray tube, pressure unit and filament inversion unit successively.High-voltage inverted impulse hunting control unit is connected with high-voltage inverted unit with filament inversion pulse oscillating control unit and is connected with the filament inversion unit, is used for regulating high-voltage inverted unit and filament inversion unit operating frequency.The direct current of auxiliary power supply output is input to high-voltage inverted unit, makes it to be reverse into alternating current.The alternating current of high-voltage inverted unit output outputs to high-tension measurement unit, output high voltage direct current by boosting unit and voltage multiplying rectifier unit.The output of the high voltage direct current after secondary booster is connected with the high-tension measurement unit, can constantly observes the size of output voltage and electric current by the high-tension measurement unit, whether linear adjustable with the electric current and voltage of convenient monitoring power supply output.The beam current measurement unit is connected with X-ray tube, can carry out measurement and monitoring to the line that X-ray tube produces, and namely can observe the output energy of X ray.
The present invention combines filament inversion unit, pressure unit, filament inversion impulse hunting control unit with X-ray tube, realize the X-ray tube filament heating, is conducive to inspire electronics.Dc high-voltage with output is input on X-ray tube simultaneously, for electron beam accelerates.Worked simultaneously in above each unit and just can realize the emission of X ray.
The present invention adopts controllable silicon Q1 as the core devices of high-voltage inverted unit, makes high voltage source stability when work stronger, and the scope of application is wider, and efficient is higher.High-voltage inverted impulse hunting control unit in the present invention utilizes the frequency conversion function of TL494, realizes the change to the integrated circuit operating frequency, makes circuit be in the high frequency state when work, does not produce noise.Its main feature is that volume is little, and is lightweight, is convenient to I﹠M, draws materials conveniently, and cost is low, and transportation is easy to carry.
Description of drawings:
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that internal circuit of the present invention connects block diagram.
Fig. 2 is circuit structure block diagram of the present invention.
Fig. 3 is high-voltage inverted element circuit schematic diagram.
Fig. 4 is source voltage multiplying rectifier element circuit schematic diagram.
Fig. 5 is the oscillogram of high-voltage inverted unit controllable silicon Q1.
Fig. 6 is the oscillogram of filament inversion unit controllable silicon Q2.
Embodiment:
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, intactly description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Give the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As depicted in figs. 1 and 2: Portable frequency converting X-fluorescence source comprises high-voltage inverted unit, boosting unit, high-voltage inverted impulse hunting control unit, voltage multiplying rectifier unit, high-tension measurement unit, filament inversion unit, X-ray tube, pressure unit, beam current measurement unit, filament inversion pulse oscillating control unit.High-voltage inverted unit connects boosting unit, voltage multiplying rectifier unit, X-ray tube, pressure unit and filament inversion unit successively.High-voltage inverted impulse hunting control unit is connected with high-voltage inverted unit with filament inversion pulse oscillating control unit and is connected with the filament inversion unit, is used for regulating high-voltage inverted unit and filament inversion unit operating frequency.The direct current of auxiliary power supply output is input to high-voltage inverted unit, makes it to be reverse into alternating current.The alternating current of high-voltage inverted unit output outputs to high-tension measurement unit, output high voltage direct current by boosting unit and voltage multiplying rectifier unit.The output of the high voltage direct current after secondary booster is connected with the high-tension measurement unit, can constantly observes the size of output voltage and electric current by the high-tension measurement unit, whether linear adjustable with the electric current and voltage of convenient monitoring power supply output.The beam current measurement unit is connected with X-ray tube, can carry out measurement and monitoring to the line that X-ray tube produces, and namely can observe the output energy of X ray.
As shown in Figure 3: the positive pole of auxiliary power supply is connected to the input of inductance L, the positive terminal of capacitor C 1 simultaneously, and the output of inductance L connects the positive terminal of controllable silicon Q1, the negative pole end of diode D1, the input of resistance R 6, the input of capacitor C 3 simultaneously; The output of resistance R 6 connects the input of capacitor C 5, one end of the output connection transformer primary coil of capacitor C 3, the negative pole of auxiliary power supply connect the negative pole end of capacitor C 1, the negative pole end of controllable silicon Q1, the positive terminal of diode D1, the output of capacitor C 5, the other end of transformer simultaneously; Impulse hunting control unit signal output part is connected to the trigger electrode of controllable silicon Q1.At the voltage input end input dc power, carry out filtering through L and C1, guarantee that direct current preferably is fed to the input of high-voltage inverted unit.The operating frequency of high-voltage inverted unit is just to realize by the speed of regulating high-voltage inverted impulse hunting control unit output signal.The main core component of high-voltage inverted impulse hunting control unit is the TL494 integration module, can be by the difference of its pin connected mode, make TL494 realize the output pulse control signal, this signal is passed to controllable silicon Q1 in high-voltage inverted unit, control the conducting turn-off time of controllable silicon Q1 and then control the operating frequency of high-voltage inverted unit.When triggering signal makes controllable silicon Q1 conducting, the externally fed power supply is to the inductance L energy storage, capacitor C 3 consists of an oscillating circuit by the primary coil of controllable silicon Q1 and T1, the front half period of earthquake, concussion electric current forward is by controllable silicon Q1, its electric current is strengthened, and with in energy storage T1 primary coil, wherein the sense of current in the T1 primary coil is for from bottom to top; The rear half period of earthquake circuit, concussion electric current reverse flow is crossed controllable silicon Q1, its electric current is diminished reduce to 0, remaining electric current flows by fly-wheel diode, with the energy in the T1 primary coil in being stored in C3, tube voltage drop on D1 has just guaranteed the silicon controlled reliable turn-off, and the sense of current in the T1 primary coil is for from top to bottom; After completing above-mentioned one-period, produce a square-wave voltage on transformer, and then effectively realize silicon controlled inversion process.When the T1 primary coil carries out reverse charge by diode D1 to capacitor C 3, can produce a reverse voltage at controllable silicon Q1 two ends, in order to prevent from puncturing controllable silicon Q1, in controllable silicon Q1 two ends parallel connection R6, C5 absorption circuit, to reduce the shutoff voltage spike of switching tube Q1.
Waveform when observing controllable silicon Q1 work by oscilloscope, can find out from the waveform of Fig. 5, the ON time of controllable silicon Q1 causes unstable working condition, controllable silicon to reach very good working order to avoid controllable silicon Q1 because of the heating that works long hours continuously less than its deadline.Also can find out from the waveform of Fig. 5, it is longer that the inversion tip is pulled open, and proves that high-voltage inverted unit is in good inversion operating state.
Alternating current after once boosting is input to the voltage multiplying rectifier unit, its circuit as shown in Figure 4: an end of transformer secondary output coil connects the input of capacitor C 1 and the positive terminal of diode K1 simultaneously.The other end of transformer secondary output coil connects the input of capacitor C 1 ', and the output of capacitor C 1 ' connects the negative pole end of diode K1, the positive terminal of diode K1 ' and the input of capacitor C 2 ' simultaneously.Capacitor C 2 ' connects the negative pole end of diode K2 and the positive terminal of diode K2 ' simultaneously.The output of capacitor C 1 connects the positive terminal of diode K1 ' negative pole end, diode K2 and the input of capacitor C 2 simultaneously.The output of capacitor C 2 connects diode K2 ' negative pole end.It mainly utilizes the unidirectional general character and the continuous charging/discharging function of electric capacity of diode, realizes making alternating current convert direct current to boost in voltage with to the rectification of electric current.When through the Voltage-output after once boosting during to the input of voltage multiplying rectifier unit, unilateral conduction due to diode, when front half period voltage at first by diode K1 ' to capacitor C the electric weight on ' charge, be stored in capacitor C in rear half period ' by diode K
1Capacitor C is charged.Like this iterative cycles, to the continuous charging and discharging of C and C ', voltage is constantly accumulation on electric capacity, and along with the increase of stages, output voltage is more and more higher, finally obtains the high voltage direct current of wanting.
Filament inversion impulse hunting control unit, filament inversion unit, pressure unit are connected with X-ray tube, can realize making it launch electronics to the X-ray tube filament heating.Wherein the operation principle of filament inversion unit is identical with high-voltage inverted unit, and the operation principle of filament inversion pulse oscillating control unit is identical with high-voltage inverted pulse oscillating control unit, and both difference is that device parameters is different.
Waveform when observing filament inversion controllable silicon Q2 work by oscilloscope, can find out from the waveform of Fig. 6, the ON time of controllable silicon Q2 is less than its deadline, to avoid controllable silicon Q2 to cause unstable working condition because of the heating that works long hours continuously, controllable silicon Q2 reaches very good working order.Also can find out from the waveform of Fig. 6, it is longer that the inversion tip is pulled open, and proves that high-voltage inverted unit is in good inversion operating state
The voltage of voltage multiplying rectifier unit output is input to the high-tension measurement unit, can realizes the measurement and monitoring at any time to output voltage and electric current, to the adjusting of output voltage and electric current.High-voltage measuring circuit as shown in Figure 1, it is comprised of measuring resistance and ammeter.With above each unit in when work according to Fig. 1 exact connect ion.During line, connect a wire according to label every a binding post, to avoid wire connection error and circuit-line short circuit.
Static structure figure such as Fig. 4 of Portable frequency converting high-voltage DC power supply voltage multiplying rectifier unit, an end of transformer secondary output coil connects the input of capacitor C 1 simultaneously, the positive terminal of diode K1.The other end of transformer secondary output coil connects the input of capacitor C 1 ', and the output of capacitor C 1 ' connects the negative pole end of diode K1 simultaneously, the positive terminal of diode K1 ', the input of capacitor C 2 '.Capacitor C 2 ' connects the negative pole end of diode K2 simultaneously, the positive terminal of diode K2 '.The output of capacitor C 1 connects diode K1 ' negative pole end, the positive terminal of diode K2, the input of capacitor C 2 simultaneously.The output of capacitor C 2 connects diode K2 ' negative pole end.
At last with above each unit package in stuffing box, just can make a Portable frequency converting X-fluorescence source.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from marrow or the scope of invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will accord with principle disclosed herein and features of novelty the widest consistent scope.
Claims (3)
1. Portable frequency converting X-fluorescence source is characterized in that: comprise high-voltage inverted unit, boosting unit, high-voltage inverted impulse hunting control unit, voltage multiplying rectifier unit, high-tension measurement unit, filament inversion unit, X-ray tube, pressure unit, beam current measurement unit, filament inversion pulse oscillating control unit; High-voltage inverted unit connects boosting unit, voltage multiplying rectifier unit, X-ray tube, pressure unit and filament inversion unit successively; High-voltage inverted impulse hunting control unit is connected with high-voltage inverted unit with filament inversion pulse oscillating control unit and is connected with the filament inversion unit, is used for regulating high-voltage inverted unit and filament inversion unit operating frequency; The direct current of auxiliary power supply output is input to high-voltage inverted unit, makes it to be reverse into alternating current; The alternating current of high-voltage inverted unit output outputs to high-tension measurement unit, output high voltage direct current by boosting unit and voltage multiplying rectifier unit; The output of the high voltage direct current after secondary booster is connected with the high-tension measurement unit, and by the size that output voltage and electric current are observed in the high-tension measurement unit, whether the electric current and voltage of monitoring power supply output is linear adjustable; The beam current measurement unit is connected with X-ray tube, can carry out measurement and monitoring to the line that X-ray tube produces.
2. Portable frequency converting X-fluorescence as claimed in claim 1 source, it is characterized in that: described high-voltage inverted element circuit structure is: the positive pole of auxiliary power supply is connected to the input of inductance L, the positive terminal of capacitor C 1 simultaneously, and the output of inductance L connects the positive terminal of controllable silicon Q1, the negative pole end of diode D1, the input of resistance R 6, the input of capacitor C 3 simultaneously; The output of resistance R 6 connects the input of capacitor C 5, one end of the output connection transformer primary coil of capacitor C 3, the negative pole of auxiliary power supply connect the negative pole end of capacitor C 1, the negative pole end of controllable silicon Q1, the positive terminal of diode D1, the output of capacitor C 5, the other end of transformer simultaneously; Impulse hunting control unit signal output part is connected to the trigger electrode of controllable silicon Q1.
3. Portable frequency converting X-fluorescence as claimed in claim 1 source, it is characterized in that: described voltage multiplying rectifier element circuit structure is: an end of transformer secondary output coil connects the input of capacitor C 1 and the positive terminal of diode K1 simultaneously; The other end of transformer secondary output coil connects the input of capacitor C 1 ', and the output of capacitor C 1 ' connects the negative pole end of diode K1, the positive terminal of diode K1 ' and the input of capacitor C 2 ' simultaneously; Capacitor C 2 ' connects the negative pole end of diode K2 and the positive terminal of diode K2 ' simultaneously; The output of capacitor C 1 connects the positive terminal of diode K1 ' negative pole end, diode K2 and the input of capacitor C 2 simultaneously; The output of capacitor C 2 connects diode K2 ' negative pole end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105558689A CN103096609A (en) | 2012-12-19 | 2012-12-19 | Portable variable-frequency X fluorescent light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105558689A CN103096609A (en) | 2012-12-19 | 2012-12-19 | Portable variable-frequency X fluorescent light source |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6038287A (en) * | 1995-10-10 | 2000-03-14 | Miles; Dale A. | Portable X-ray device |
| CN201051081Y (en) * | 2007-06-29 | 2008-04-23 | 丹东华日理学电气有限公司 | Portable high-frequency X-ray damage detector |
-
2012
- 2012-12-19 CN CN2012105558689A patent/CN103096609A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6038287A (en) * | 1995-10-10 | 2000-03-14 | Miles; Dale A. | Portable X-ray device |
| CN201051081Y (en) * | 2007-06-29 | 2008-04-23 | 丹东华日理学电气有限公司 | Portable high-frequency X-ray damage detector |
Non-Patent Citations (2)
| Title |
|---|
| 张宇: "一种便携式能量色散X射线荧光分析仪的设计", 《核电子学与探测技术》 * |
| 马跃: "150kV小型变频高压电源设计", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
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Application publication date: 20130508 |