CN2251146Y

CN2251146Y - Counting controllable high-efficiency high-voltage power supply of flash X-ray tester

Info

Publication number: CN2251146Y
Application number: CN 96202939
Authority: CN
Inventors: 王德安
Original assignee: KEDIAN HIGH TECHNOLOGY Co BEIJING
Current assignee: KEDIAN HIGH TECHNOLOGY Co BEIJING
Priority date: 1996-02-15
Filing date: 1996-02-15
Publication date: 1997-04-02
Anticipated expiration: 2006-02-15

Abstract

The utility model discloses a counting controllable high-frequency high-voltage power supply of a flash X-ray tester, comprising a low-voltage power supply which is arranged in a main frame, a relay, a DC-DC high-frequency high-voltage transformer, a pulse shaping circuit, and an independent counting controller, wherein, the output of the low-voltage power supply which is connected in series with the locking contact of the relay supplies for the high-frequency high-voltage transformer; the output of the high-frequency high-voltage transformer is connected with a high-voltage pulse generator in the main frame and is connected with the input end of the pulse shaping circuit; the output end of the pulse shaping circuit is connected with the independent counting controller by a shielded wire; the output of the independent counting controller is connected with a relay control coil. The utility model has the advantages of small size, light weight, simple circuit, remote control, radiation hazard avoidance, etc.

Description

The controlled high-frequency and high-voltage power supply of the counting of flash X-ray detector

The utility model relates to a kind of high-frequency and high-voltage power supply, relates in particular to a kind of controlled high-frequency and high-voltage power supply of counting of flash X-ray detector.

The power supply of existing flash X-ray detector, include low-tension supply and high-voltage power supply two parts, it mainly has problems, and what be that its high-voltage power supply adopts is the big and heavy Industrial Frequency Transformer of body, make machine volume big, heavy, and not shaking the count control device of control, operating personnel are too near from instrument during operation, are subject to the harm of X-radiation.

The purpose of this utility model is to design the high-frequency and high-voltage power supply of the little lightweight band remote control count control device of a kind of volume, can be easy to carry so that install the flash X-ray detector of this kind power supply, and is light and handy, and operating personnel can exempt the X-ray radiation hazard.

The purpose of this utility model is to realize like this, the controlled high-frequency and high-voltage power supply of a kind of counting of flash X-ray detector, include the low-tension supply of being located in the main frame, the high-frequency and high-voltage transducer, wherein low-tension supply includes electric battery and the batteries charging power unit of being made up of miniature transformer and current rectifying and wave filtering circuit and the low-voltage regulated power supply part formed of in succession mu balanced circuit mutually therewith, it is characterized in that having set up a pulse shaping circuit and a counter-controller and a relay at the output terminal of high-frequency and high-voltage transducer, wherein the high-frequency and high-voltage transducer is the DC-DC transducer, its power supply is supplied with two different magnitude of voltage power supplys by low-tension supply, and these two power supplys all are connected in series mutually with the locking contact of relay, pulse shaping circuit, the power supply of count control circuit is supplied with by the low pressure voltage stabilizer in the low-tension supply, the arrester switch of the high-voltage pulse generator of the output of DC-DC transducer and x-ray detector main frame links, and its output terminal links with the input end of pulse shaping circuit again, the output of pulse shaping circuit links by the input end of the counter-controller outside shielded cable and the main frame, one end of the output terminal of counter-controller and relay control coil joins, the other end ground connection of control coil.

The high-frequency and high-voltage power supply of said structure, by the DC-DC transducer DC low-voltage is transformed to the negative DC voltage of high-frequency and high-voltage and is defeated by the high-voltage pulse generator of main frame, because of the volume of DC-DC transducer own little, in light weight, the big Industrial Frequency Transformer of body makes high-frequency and high-voltage power supply of the present utility model have the little lightweight advantage of body by its original heaviness of replacement.This power supply is because of having adopted pulse shaping circuit in addition, it is shaped as high-power low frequency broad pulse with the narrow pulse that switch in the high-voltage pulse generator produces, this shaping afterpulse can distantly be failed (using shielded cable) to counter-controller, when treating that input pulse number and giving of counting are put several equating, counter-controller has output, make and export joining relay outage therewith, meanwhile, the power supply that seals in the DC-DC high-frequency and high-voltage transducer of relay contact just cuts off, also just not output, thus just can reach the purpose that operating personnel avoid the X-ray radiation hazard with the controlled remote-controlled operation of counting.

As seen by above-mentioned, advantage of the present utility model is that volume is little, and is in light weight, can realize the remote control counting and can improve operator's work situation, makes it avoid X-radiation harm.

Come further structure of the present utility model further to be narrated with embodiment and accompanying drawing below.Embodiment

Description of drawings:

Fig. 1 is a frame principle figure of the present utility model

Fig. 2 is the circuit diagram of low-tension supply

Fig. 3 is DC-DC converter circuit figure

Fig. 4 is the pulse shaping circuit circuit diagram

Fig. 5 is the circuit diagram of counter-controller

By shown in Fig. 1-5 as seen, low-tension supply in the present embodiment, high-frequency and high-voltage transducer and pulse shaping circuit all are located in the main frame, wherein low-tension supply is by nickel-cadmium battery group E and transformer B, bridge rectifier D, capacitance resistance C ₁, R ₁The low-voltage regulated power supply part that batteries charging power unit that wave filter is formed and integrated package 7812 mu balanced circuits that link to each other are therewith formed is formed (referring to Fig. 2).

High-frequency and high-voltage DC-DC transducer (referring to Fig. 3) is by being made up of high-frequency and high-voltage change-over circuit and voltage-multiplying circuit, and wherein the high-frequency and high-voltage change-over circuit is by the high-frequency transformer B of VMOS power transistor and PWM (pulse width modulator) integrated circuit TL494 and band FERRITE CORE ₂Symmetry connects and forms; Its output terminal with by capacitor C ₂Diode D ₁, D ₂Resistance R ₂₁, R ₂₂The voltage-multiplying circuit of being formed links, and at the D of voltage-multiplying circuit ₂With R ₂₁Between the series connection one current limliting additional inductor L ₂, inductance L ₂With resistance R ₂₁Interface is the output terminal of DC-DC transducer, the arrester switch K of it and high-voltage pulse generator ₂An electrode join, another electrode grounding of arrester switch, the output terminal of DC-DC transducer also join with the input end of pulse shaping circuit; The power supply of DC-DC transducer is for to be supplied with respectively by electric battery and low-voltage regulated power supply two parts of low-tension supply, wherein all with after relay normally open contact is gone here and there mutually link with the DC-DC transducer again, to realize the usefulness of counting control at the output terminal of electric battery with voltage stabilizing low-tension supply part.The high direct voltage voltage of the voltage multiplying rectifier output of DC-DC transducer, the arrester switch K in high-voltage pulse generator ₂And capacitor C ₂₀Logical, disconnected and discharge and recharge effect, what make that it transports to pulse shaping circuit is a high voltage narrow pulse signal.

Pulse shaping circuit (shown in Figure 4) is by R ₃₀C ₃₀Filtering circuit, transistor switching circuit and 555 time base circuits are formed, and wherein transistor switching circuit is by triode T ₃₁, T ₃₂With divider resistance R ₃₁, R ₃₂, R ₃₃And stabilivolt W ₃₁Deng form triode T ₃₁Base stage and resistance R ₃₁, R ₃₂Between interface join, collector passes through resistance R ₃₃With triode T ₃₂Base stage join T ₃₂Grounded emitter, T ₃₂Collector pass through resistance R ₃₂, R ₃₁Join T with the output terminal of filtering circuit ₃₁Emitter by diode D ₃₁, stabilivolt W ₃₁Join with the output terminal of filtering circuit, at T ₃₁Emission involves the capacitor C of the power supply usefulness of joining between ground wire ₃₃, T ₃₁The current collection output terminal of transistor switching circuit very, it is through capacitor C ₃₁Join with input end 2 pin of 555 time base circuits, input end 1 pin and ground wire join, and 5 pin are by capacitor C 32 ground wires, and output terminal 3 pin pass through resistance R ₃₅Shielding line is connected with the input of counter-controller.

Above-mentioned pulse shaping circuit is through the signal of filtering circuit gained, make sampling pulse through the narrow pulse signal of transistor switching circuit during with the negative high voltage direct current that takes out the output of DC-DC transducer arrester switch break-make at high-voltage pulse generator, then through the broadening of time base circuit, add high-power output again, directly related with the high-voltage pulse generator umber of pulse like this high-power signal, the counter-controller outer by shielded cable and main frame is connected, and just can realize wired remote control accurately and effectively.

Count control circuit is served as reasons and is arranged at the interior filter capacitor C of controller casing ₄₁, gate circuit, counting circuit, put several circuit, ON-OFF control circuit and be arranged at signal lamp on the casing face, put several circuit dial switch etc. form, by as seen shown in Figure 5, the give counting circuit of putting reversible counting of its counting circuit for being formed by the secondary CD4029 in the cmos circuit, putting several circuit is that two 10 system dial switchs are formed, and the shaping circuit of being made up of CD4093 secondary Sheffer stroke gate is with after filter capacitor is connected in series shaping, input end with counting circuit links again, and the output terminal of counting circuit is again through paraphase of CD4093 Sheffer stroke gate and diode D ₄₁, resistance R ₄₅The input end of back and the ON-OFF control circuit of being complementary joins, in counting circuit, and the VCC of secondary DC4029, B/ D, the equal ground connection of U/ D terminal, J ₀, J ₁, J ₂, J ₃Equal and the resistance R of terminal ₄₁R ₄₂, R ₄₃, R ₄₄And 10 advance dial switch and join resistance R ₄₁, R ₄₂, R ₄₃, R ₄₄The other end and ground wire join the C of first order DC4029 _LTerminal is an input end, Ci terminal and ground wire join, the CL terminal of Co terminal and second level CD4029 joins, and partial Co terminal is the output terminal of counting circuit, the equal and capacitor C of the PE terminal among the secondary CD4029 ₄₃-end joins, and through R ₄₀Ground connection, and the voltage terminal V of secondary CD4029 in the counting circuit _DDLink two V with the output terminal of ON-OFF control circuit _DDTerminal again respectively with capacitor C ₄₂And C ₄₃An end join capacitor C ₄₂Other end ground connection, capacitor C ₄₃The other end and the PE terminal of CD4029 join.

ON-OFF control circuit in the present embodiment is by triode T ₄₁, T ₄₂, T ₄₃Controllable silicon G and resistance, electric capacity, and institute such as diode forms the 12V voltage of voltage regulation and the triode T of low-tension supply ₄₂Emitter join T ₄₂The current collection output point of supply voltage very, and this voltage is through resistance R ₅₃Capacitor C ₄₄Circuit is supplied with transistor circuit, triode T ₄₁Base stage and the output terminal of counting circuit join T ₄₁Emitter and the control utmost point of the controllable silicon G controllable silicon G grounded drain that joins, source electrode is connected to the R that is connected in series mutually with power supply ₄₈, R ₄₉, R ₅₀R ₄₈And R ₄₉The series connection contact on, T ₄₃Base stage be connected to resistance R ₄₉And R ₅₀The series connection contact on, T ₄₃Collector and T ₄₂Base stage link, and by divider resistance R ₅₁Link with power supply 12V voltage of voltage regulation, and by R in parallel ₅₂, C ₄₅Circuit and K switch ₄An end join K switch ₄Other end ground connection, above-mentioned T ₄₂Current collection is the supply voltage output point very, and it is by diode D ₄₂Join with relay J coil one end, by diode D ₄₃Voltage terminal V with the secondary CD4029 of counting circuit _DDLink relay J coil other end ground connection, T ₄₂Emitter through diode D ₄₄, D ₄₅Ground connection.

Above-mentioned ON-OFF control circuit is worked as K switch ₄During on position, triode T ₄₂Conducting, then T ₄₃Conducting, the 12V supply voltage is by diode D ₄₃To capacitor C ₄₂Charging, simultaneously the PE terminal of secondary CD4029 is a positive potential, puts several devices and just can put severally to enter; Meanwhile relay J is connected, and high-voltage pulse generator is just started working, and counter just has pulse input, T at this moment ₄₁Obstructed, not conducting of controllable silicon G is because of T ₄₃So conducting is K switch ₄Even disconnect, because of T ₄₃Conducting, T ₄₂Still conducting, that is counter interrupter duty treat that counting circuit has a signal to export when giving on umber of pulse and the counting circuit of input put number and equated, make T ₄₁Conducting, thus make the controllable silicon conducting, this moment T ₄₃Base potential changes, and makes T ₄₃Not conducting, T ₄₂Also not conducting, relay J outage, thus make high-voltage pulse generator outage source and stop work, and realized counting control.

Present embodiment is owing to adopted the simple DC-DC high-frequency and high-voltage of circuit transducer, lower than like product price, weight reduces by 20%, adopt voltage-multiplying circuit can reduce transformer voltage, thereby adopt the VMOS transistor to raise the efficiency main frame is had in light weight, volume is little, advantage such as be easy to carry, and it is set up with the main frame split shake the control counter.Be located in the main frame and its pulse shaping circuit that matches, make the operator a long way off (from 10 meters in main frame) count control, thereby make the operator can avoid the harm of main frame X-radiation.

The foregoing description only is an example preferable in the technical program, the All other routes that technician in the electronic applications can adopt said function according to prior art are the PWM integrated circuit in the DC-DC transducer for example, also can select SG1524 for use, SG3524,555 time base circuits in the pulse shaping circuit, also available 1/2556 integrated package replaces, and can achieve the goal equally.

Claims

1, the controlled high-frequency and high-voltage power supply of a kind of counting of flash X-ray detector, include the low-tension supply of being located in the main frame, the high-frequency and high-voltage transducer, wherein low-tension supply includes electric battery and by miniature transformer, batteries charging power unit that current rectifying and wave filtering circuit is formed and the low-voltage regulated power supply part formed of in succession stabilized voltage supply mutually therewith, it is characterized in that having set up a pulse shaping circuit and a counter-controller and a relay that is subjected to counter-controller control at the output terminal of high-frequency and high-voltage transducer, wherein the high-frequency and high-voltage transducer is the DC-DC transducer, its power supply is supplied with two different magnitude of voltage power supplys by low-tension supply, and these two power supplys all are connected in series mutually with the locking contact of relay, pulse shaping circuit, the power supply of count control circuit is partly supplied with by the low pressure voltage stabilizing in the low-tension supply, the arrester switch of the high-voltage pulse generator of the output of DC-DC transducer and x-ray detector main frame links, and its output terminal links with the input end of pulse shaping circuit again, the output of pulse shaping circuit links by the input end of the counter-controller outside shielded cable and the main frame, and an end of the output terminal of counter-controller and relay control coil joins.

2, press the controlled high-frequency and high-voltage power supply of counting of the described flash X-ray detector of claim 1, it is characterized in that its described high-frequency and high-voltage DC-DC is transformed to by high-frequency and high-voltage change-over circuit and voltage-multiplying circuit is formed, and wherein the high-frequency and high-voltage change-over circuit is by the high-frequency transformer B of VMOS power transistor, PWM integrated circuit TL494 and band FERRITE CORE ₂Symmetry connects and forms; Its output terminal with by capacitor C ₂, diode D ₁, D ₂Resistance R ₂₁, R ₂₂The voltage-multiplying circuit of being formed links, and at the D of voltage-multiplying circuit ₂With R ₂₁Between the series connection one current limliting additional inductor L ₂, inductance L ₂With resistance R ₂₁Interface is the output terminal of DC-DC transducer, the arrester switch K of it and main frame mesohigh pulser ₂An electrode join, another electrode grounding of arrester switch, the output terminal of DC-DC transducer also join with the input end of pulse shaping circuit; The power supply of DC-DC transducer is for to be supplied with respectively by electric battery and low-voltage regulated power supply two parts of low-tension supply, and all with after relay normally open contact is gone here and there mutually links with the DC-DC transducer at the output terminal of electric battery with voltage stabilizing low-tension supply part again.

3,, it is characterized in that its described pulse shaping circuit is by R by the controlled high-frequency and high-voltage power supply of counting of the described flash X-ray detector of claim 1 ₃₀C ₃₀Filtering circuit, transistor switching circuit and 555 time base circuits are formed, and wherein transistor switching circuit is by triode T ₃₁, T ₃₂With divider resistance R ₃₁, R ₃₂, R ₃₃And stabilivolt W ₃₁Deng form triode T ₃₁Base stage and resistance R ₃₁, R ₃₂Between interface join, collector passes through resistance R ₃₃With triode T ₃₂Base stage join T ₃₂Grounded emitter, T ₃₂Collector pass through resistance R ₃₂, R ₃₁Join T with the output terminal of filtering circuit ₃₁Emitter by diode D ₃₁, stabilivolt W ₃₁Join with the output terminal of filtering circuit, at T ₃₁The capacitor C of the power supply usefulness of joining between emitter and ground wire ₃₃, T ₃₁The current collection output terminal of transistor switching circuit very, it is through electric capacity BC ₃₁Join with input end 2 pin of 555 time base circuits, input end 1 pin and ground wire join, and 5 pin pass through capacitor C ₃₂Ground wire, and output terminal 3 pin pass through resistance R ₃₅The back is connected with the input of counter-controller with shielding line.

4,, it is characterized in that its described count control circuit is served as reasons to be arranged at filter capacitor C in the controller casing by the controlled high-frequency and high-voltage power supply of counting of the described flash X-ray detector of claim 1 ₄₁, gate circuit, counting circuit, put several circuit, ON-OFF control circuit and be arranged at signal lamp on the casing face, put several circuit dial switch etc. form, the give counting circuit of putting reversible counting of its counting circuit for being formed by the secondary CD4029 in the CMO S circuit, putting several circuit is that two 10 system dial switchs are formed, and the shaping circuit of being made up of CD4093 secondary Sheffer stroke gate is with after filter capacitor is connected in series shaping, input end with counting circuit links again, and the output terminal of counting circuit is again through paraphase of DC4093 Sheffer stroke gate and diode D ₄₁Resistance R ₄₅The coupling back joins with the input end of ON-OFF control circuit, and ON-OFF control circuit is by triode T ₄₁, T ₄₂, T ₄₃, controllable silicon G and resistance capacitance, diodes etc. are formed, 12V voltage of voltage regulation and triode T that low-tension supply is come ₄₂Emitter join T ₄₂The current collection output point of supply voltage very, triode T ₄₁Base stage and the output terminal of counting circuit join T ₄₁Emitter and the control utmost point of controllable silicon G join, the grounded drain of controllable silicon G, source electrode are connected to the R that is connected in series mutually with power supply ₄₈, R ₄₉, R ₅₀R ₄₈And R ₄₉The series connection contact on, T ₄₃Base stage be connected to resistance R ₄₉And R ₅₀The series connection contact on, T ₄₃Emitter through diode D ₄₄, D ₄₅K switch ₄Ground connection, T ₄₃Collector and T ₄₂Base stage link, and by divider resistance R ₅₁Link with 12V power supply voltage of voltage regulation, and by R in parallel ₅₂, C ₄₅Circuit and K switch ₄An end join K switch ₄Other end ground connection, above-mentioned T ₄₂Current collection is the supply voltage output point very, and it is by diode D ₄₂Join with relay J coil one end, and by diode D ₄₃Voltage terminal V with the secondary CD4029 of counting circuit _DDLink relay J coil other end ground connection, two V _DDAuspicious son again respectively with capacitor C ₄₂And C ₄₃An end join capacitor C ₄₂Other end ground connection, capacitor C ₄₃The other end and two PE terminals among two CD4029 join.