CN204482135U - The special mercury lamp power supply of innovative microscope - Google Patents
The special mercury lamp power supply of innovative microscope Download PDFInfo
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- CN204482135U CN204482135U CN201420389088.6U CN201420389088U CN204482135U CN 204482135 U CN204482135 U CN 204482135U CN 201420389088 U CN201420389088 U CN 201420389088U CN 204482135 U CN204482135 U CN 204482135U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The utility model relates to a kind of direct-current mercury lamp power supply, relate to a kind of mercury lamp power supply special based on microscope more specifically.It is made up of following circuit, comprises EMI, multiplication of voltage, rectifying and wave-filtering, power conversion half-bridge, main transformer, high pressure conversion, output filtering, invariable power, master control, protection, driving, microprocessor, audible alarm, digital-scroll technique, high pressure self-starting, power limitation control, AD sample circuit and mercury lamp composition.By selecting dedicated IC chip and microprocessor, circuit design and PCB design are carried out again to mercury lamp power supply, the mercury lamp power supply making innovative microscope special meets the safety standard requirements of electronic product safety standard " EN60950-1 (GB4943) " completely, through practical application, prove the requirement meeting microscope mercury lamp, easy to operate, display alarm perfect in shape and function, substantially increases the useful life of mercury lamp, and the use cost of user is greatly reduced.
Description
Technical field
What the present invention relates to is a kind of direct-current mercury lamp power supply, relates to a kind of mercury lamp power supply special based on microscope more specifically.
Background technology
Because Biophot needs abundant ultraviolet to excite the fluorescence of sample, containing abundant ultraviolet light in the spectrum of mercury lamp emission, be used as the light source of fluorescence microscope.Fluorescence microscope is the basic tool of cell fluorescence chemical, is after utilizing the fluorescent material in the optical excitation sample of certain wavelength to launch the fluorescence of various different colours, is amplified by object lens and eyepiece system to observe sample.Normally used is at present 100W super pressure mercury lamp, a pair tungsten electrode and liquid mercury (being attached on tube wall under room temperature) is connected with in fluorescent tube, time unignited, intraductal atmospheric pressure is very low, apply after voltage lights between two electrodes of fluorescent tube, mercury vapour turns to mercury vapour and forms mercury arc and produce high light, and temperature raises, and intraductal atmospheric pressure is raised to rapidly 10 atmospheric pressure.Owing to being anticyclonic gas discharge, so using and operating and will pay special attention to.If when violating operating provision, will serious consequence be caused!
The power good of current existing direct-current mercury lamp power supply is on the market poor, and power output is unstable, affects light stability; Each defencive function imperfection; be not activated current-limiting protection, there is no overtemperature protection, can not mercury lamp light intensity regulating be carried out; so existing direct-current mercury lamp power supply affects the useful life of mercury lamp and the personal safety of operating personnel greatly, very high this of the price due to mercury lamp just increases the use cost of user greatly.
Summary of the invention
The present invention is directed to the deficiency of prior art existence and provide a kind of safe and reliable innovative microscope special mercury lamp power supply, in order to realize this purpose, the present invention has come by the following technical programs:
A kind of mercury lamp power supply special based on Novel microscope, 110VAC/220VAC exchanges input and delivers to EMI circuit 1, it exports sends into voltage-multiplying circuit 3, direct voltage after voltage-multiplying circuit 3 sends into current rectifying and wave filtering circuit 2, power conversion half-bridge circuit 4 is sent into through the filtered direct voltage of voltage multiplying rectifier, the alternating current component that power conversion half-bridge circuit 4 exports sends into main transformer 5, and the alternating current component that main transformer 5 exports outputs to mercury lamp 18 through high voltage conversion circuit 6; Another road alternating current component that main transformer 5 exports sends into output filter circuit 7; Direct voltage after output filter circuit 7 rectifying and wave-filtering sends into mercury lamp 18.Direct voltage after invariable power circuit 11 pairs of output filter circuit 7 rectifying and wave-filterings is sampled; signal after sampling sends into governor circuit 9; protective circuit 10 is sampled to the direct voltage after output filter circuit 7 rectifying and wave-filtering simultaneously; signal after sampling also sends into governor circuit 9; governor circuit 9 exports control signal to drive circuit 8; carry out PWM (pulse duration) by drive circuit 8 pairs of half-bridge circuits to control, thus control the size of bulb operating current.
Further technical scheme: the direct voltage after AD sample circuit 14 pairs of output filter circuit 7 rectifying and wave-filterings is sampled, signal after sampling sends into microprocessor 13, and signal one tunnel after microprocessor processes 13 is analyzed is sent to digital-scroll technique circuit 16 and shows the voltage and current values that output to mercury lamp 18; One tunnel is sent into audible alarm circuit 15 pairs of over-voltage and over-current signals and is carried out audible alarm; High pressure self-start circuit 17 is sent on one tunnel, controls high voltage conversion circuit 6.
Further technical scheme: microprocessor 13 is connected with man-machine interaction circuit 12, operating personnel can be communicated with microprocessor 13 by man-machine interaction circuit 12 according to actual conditions, the relevant parameters of setting actual needs, the size of such as operating current, the height of operating voltage, delay time, automatic shutdown time etc.
Compared with prior art, the invention has the beneficial effects as follows:
By selecting dedicated IC chip (TL494PWM integrated circuit) and Microprocessor S3C44B0X, circuit design and PCB design are carried out again to mercury lamp power supply, the special mercury lamp power supply of this Novel microscope meets the safety standard requirements of electronic product safety standard " EN60950-1 (GB 4943) " completely, through practical application, prove the requirement meeting microscope mercury lamp, easy to operate, display alarm perfect in shape and function, substantially increase the useful life of mercury lamp, the use cost of user is greatly reduced.
Accompanying drawing explanation
Fig. 1: innovative microscope special mercury lamp power supply block diagram
Fig. 2: innovative microscope special mercury lamp power principle figure
Fig. 3: mercury lamp output voltage and electric current are with the change curve of operating time
Fig. 4: innovative microscope special mercury lamp power supply Microprocessor S3C44B0X block diagram
Fig. 5: innovative microscope special mercury lamp power supply microcontroller circuit schematic diagram
Fig. 6: innovative microscope special mercury lamp power supply microprocessor program flow chart
Embodiment
Do one below in conjunction with example to elaborate.
Fig. 1 be the special mercury lamp power supply general diagram of Novel microscope in FIG 110VAC/220VAC exchange input and deliver to EMI circuit 1, it sends into current rectifying and wave filtering circuit 2 after exporting and sending into voltage-multiplying circuit 3, direct voltage after rectifying and wave-filtering, when being input as 110Vac, automatic switch cell operation in voltage-multiplying circuit, rectification circuit is converted to voltage multiplying rectifier work, makes the direct voltage of output be 300Vdc; When being input as 220Vac, in voltage-multiplying circuit, automatic switch unit is opened automatically, the non-multiplication of voltage work of plant-grid connection, automatically can identify the height of input voltage thus enter multiplication of voltage or non-multiplication of voltage operating state in voltage-multiplying circuit.Direct voltage after rectification sends into power conversion half-bridge circuit 4, and the alternating current component that power conversion half-bridge circuit 4 exports sends into main transformer 5, and the alternating current component that main transformer 5 exports outputs to mercury lamp 18 through high voltage conversion circuit 6; First mercury lamp work need to add that high-voltage pulse is in order to puncture the liquid mercury in bulb, forms arc discharge, and then convert electrode two ends to voltage and current required by mercury lamp work; Another road alternating current component that main transformer 5 exports sends into output filter circuit 7; Direct voltage after output filter circuit 7 rectifying and wave-filtering sends into mercury lamp 18, and the direct voltage after mercury lamp is lighted after rectifying and wave-filtering is sent into mercury lamp and made it to continue the work of lighting; Direct voltage after invariable power circuit 11 pairs of output filter circuit 7 rectifying and wave-filterings is sampled, after sampling, negative voltage feedback signal sends into governor circuit 9, protective circuit 10 is sampled to the direct voltage after output filter circuit 7 rectifying and wave-filtering simultaneously, signal after sampling also sends into governor circuit 9, governor circuit 9 exports control signal to drive circuit 8, carry out PWM (pulse width modulation) by drive circuit 8 pairs of half-bridge circuits to control, thus control the size of bulb operating current; Direct voltage after AD sample circuit 14 pairs of output filter circuit 7 rectifying and wave-filterings is sampled, signal after sampling sends into microprocessor 13, and signal one tunnel after microprocessor processes analysis is sent to digital-scroll technique unit 16 and shows the voltage and current values that output to mercury lamp 18; One tunnel is sent into audible alarm circuit 15 pairs of over-voltage and over-current signals and is carried out audible alarm; High pressure self-start circuit 17 is sent on one tunnel, controls high voltage conversion circuit 6; Microprocessor 13 is connected with man-machine interaction circuit 12, operating personnel can be communicated with microprocessor 13 by man-machine interaction circuit 12 according to actual conditions, the relevant parameters of setting actual needs, cumulative time that the size of such as operating current, the height of operating voltage, delay time, automatic shutdown time, mercury lamp normally work etc.
The control signal exporting a 500ms after microcontroller 13 time delay 5S after complete machine start accesses high voltage conversion circuit to high pressure self-start circuit 17, makes it output high-voltage pulse for having lighted autostart function under bulb cold; After bulb normally works, microcontroller 13 outputs to the current/voltage value in mercury lamp (18) loop by AD sample circuit 14 output filter circuit 7 of sampling, and is presented on digital-scroll technique circuit 16 in real time; After sample rate current is greater than the electric current of 800mA, microcontroller 13 starts the cumulative time that clocking capability record mercury lamp 18 normally works, stop if the cumulative time equals 1000 little timing constantly and change mercury lamp by the prompting of audible alarm circuit 15 chimes of doom, by man-machine interaction circuit 12 input time after replacing completes, complete machine normally works and lays equal stress on new record service time.
Fig. 2 is the special mercury lamp power principle figure of microscope, 220V AC power is through insurance F1 input in fig. 2, the one-level EMI filter circuit be made up of C1, LFI, C2, C3 and C11 below, by the high frequency spurs in filtering electrical network and in-phase interference signal, makes out-put supply purer.
The input of rectifier bridge is input in fig. 2 by filtered alternating voltage, direct voltage after rectification is sent into the power conversion circuit be made up of T1, Q7, Q8, D2, D4, D7, D9, R3 ~ 6, R13 ~ 16, C7 and C13 etc. from the output output of rectifier bridge and is carried out switch control rule to direct voltage after electric capacity C5, C12 filtering, is connected to high pressure conversion and the current rectifying and wave filtering circuit of the composition such as C16, C17 and R9, C9, D6, D5, L1 after power conversion circuit respectively.Output to load to after the high pressure changing voltage after boosting, export and add that high-voltage pulse is in order to puncture the liquid mercury in bulb at mercury lamp, form arc discharge, and then convert electrode two ends to voltage and current required by mercury lamp work; Another road alternating current component that main transformer exports is sent into export and is considered ripple, and the direct voltage after mercury lamp is lighted after rectifying and wave-filtering sends into mercury lamp load.
This power supply introduces the automatic transition circuit of translation circuit and detection and electric current in fig. 2, the reason of this circuit is selected to be because circuit anti-unbalance ability is strong for this reason, power output is larger, circuit output current is very stable, is particularly suitable for the such low-voltage of mercury lamp, big current, high-power, ripple coefficient require lower job requirement.The operation principle of analysis circuit below, the half-bridge circuit that translation circuit is made up of two power tube Q7/Q8 and two electric capacity C5/C12 etc., when triode does not have triggering signal, two capacitor pulse-dischargings, capacitance voltage is Uc5=Uc12=150Vdc, when the secondary n2 coil of control transformer T2 produces forward drive pulse, Q7 conducting, C5 discharges through the primary coil of Q7 and transformer T1; Meanwhile, C12 is rushed electricity.When the secondary n3 coil of control transformer T2 produces forward drive pulse, Q8 conducting, C12 discharges through the primary coil of Q8 and transformer T1; Meanwhile, C5 is rushed electricity.Along with the break-make of Q7/Q8 switches, the pulse voltage of the secondary upper generation characteristic frequency of T1.Its voltage is, Uo=T*d*Uin/n, and in formula, d is the duty ratio of triode, must be limited in less than 0.5, prevents the conducting simultaneously of two switching tubes and causes power circuit short.Switching tube Q3/Q4 alternation, composition symmetrical operation mode, work on the primary coil of T2 transformer, the ground level of the secondary coil couple drive Q7/Q8 of T2, the secondary output of main transformer has three, different according to the number of turn, and high pressure 1000Vac is used for ignition start, the point modulating voltage of 18-40Vdc, being converted to of its high-low pressure is carried out automatically; A road is also had to be that relay and MCU circuit supply are used.
Introduce this power supply in fig. 2 in the circuit theory improving working life, because normally the life-span is 200 hours, both after 200 hours, the luminous flux of bulb only had original 80%.Under the specified invariable power input condition of setting, bulb voltage raises, and electric current can decline, mercury lamp output voltage and electric current with the operating time change curve as shown in Figure 3.As can be seen here, new bulb pressure drop is 18.2Vdc, and electric current is 5.5A.When use is after 200 hours, bulb voltage reaches 27.8Vdc (now electric current drops to 3.6A) left and right, when voltage rise, electric current declines, and light also can be dimmed, lights dim will cause user to seeing the erroneous judgement of looking into thing, and under normal circumstances, luminous flux decline 20% all must more change the bulb.Therefore, if electric current is suitably strengthened, the brightness of bulb is improved, the bulb service time that this has been scrapped will be extended, both ensure that brightness like this, also save cost.The operation principle of circuit is, bulb voltage is by the detection of voltage-stabiliser tube DZ1/DZ2/DZ3/DZ4, the switch of the optocoupler Uo/U1/U2 making bulb corresponding different in different lamp pressure drops, then determined the dividing potential drop of resistance R21/R42/R43/R44/R33/R34 and adjustable resistance W1 again by optocoupler, dividing potential drop result delivers to 1 pin of TL494; On the other hand, the 5V reference voltage of TL494 inside exports through R11/R23 dividing potential drop from 14 pin, delivers to 2 pin of TL494, and two level of 1 pin and 2 pin, by TL494 internal comparator, realize the detection of bulb in different lamp pressure drops and control.R20/R40 current sampling resistor, defines voltage negative feedback circuit, thus controls the size of bulb operating current.According to lighting condition and the practice of reality, in this power supply, we are provided with different electric currents to the bulb voltage of different phase.
Facts have proved, bulb, in the later stage in life-span, after voltage rise, suitably improves power, such setting, can make extend 50% the useful life of bulb.
Fig. 4 is innovative microscope special mercury lamp power supply Microprocessor S3C44B0X block diagram, microprocessor adopts the middle-grade microprocessor PIC16F1824 of a low-power consumption of the MICROCHIP U.S. micro-core science and technology, this microprocessor has the analog to digital converter (ADC) of 10 bit resolutions, ensure that the sampled value of its electric current has degree of precision, demonstrate the operating current of mercury lamp with this accurately; This controller has stronger antijamming capability, normally can work under high frequency switch power; The DC power supply of one group of 12V that produced by Switching Power Supply part of starting shooting input to 7805 linear voltage stabilization chips thus chip produce a stable 5V direct current for microcontroller and relevant peripheral circuit thereof power supply be provided, when controller normally works microcontroller by the accumulated time value that judges to preserve in inner EEPROM whether beyond 1000 hours, if exceed controller will control buzzer prompting with changing mercury lamp and the accumulated time value that resets by exporting I/O port.If do not exceeded, controller controls high pressure commutation circuit make it export high pressure to trigger mercury lamp and light by exporting I/O port, high pressure is exported after automatic unlatching high pressure mode so well can ensure the normal working stability of power supply, avoid that the manually super time operation done is improper and mercury lamp that is that cause is opened abnormal, be exactly without external trigger high pressure button in addition, prevent under mercury lamp normal operation, open High voltage output damage mercury lamp.Be shown in real time on charactron when controller after mercury lamp is normally lighted reads current value by AD sample circuit.And judge that size of current once judges whether mercury lamp is normally lighted, if meet the operating current of mercury lamp, open timer, the record cumulative time.One minute cumulative time preserved in EEPROM, once prevents loss of data after power down.Real-time for the time of mercury lamp electric current and cumulative activation is presented on charactron by high-precision AD sampling by microprocessor, so that we can well observe mercury lamp working condition, corresponding alarm can be provided when abnormal conditions occur and ensure that its mercury lamp normally works.
Fig. 5 is innovative microscope special mercury lamp power supply microcontroller circuit schematic diagram, and Fig. 6 is innovative microscope special mercury lamp power supply microprocessor program flow chart, and software adopts C language programming.
The content that this specification is not described in detail belongs to and well known to a person skilled in the art prior art; illustrate although the present invention is own by relevant case study on implementation and describe; but; those skilled in the art should be understood; in the scope of claims; can do the various change in form and details, therefore protection scope of the present invention is when being as the criterion with claims.
Claims (1)
1. the special mercury lamp power supply of innovative microscope, it is characterized in that: 110VAC/220VAC exchanges input and delivers to EMI circuit (1), it exports sends into voltage-multiplying circuit (3), then current rectifying and wave filtering circuit (2) is sent into, the direct voltage of direct voltage after rectifying and wave-filtering after multiplication of voltage sends into power conversion half-bridge circuit (4), the alternating current component that power conversion half-bridge circuit (4) exports sends into main transformer (5), and the alternating current component that main transformer (5) exports outputs to mercury lamp (18) through high voltage conversion circuit (6); Another road alternating current component that main transformer (5) exports sends into output filter circuit (7); Direct voltage after output filter circuit (7) rectifying and wave-filtering sends into mercury lamp (18).Invariable power circuit (11) to output filter circuit (7), (sample by the direct voltage after rectifying and wave-filtering, signal after sampling sends into governor circuit (9), protective circuit (10) is sampled to the direct voltage after output filter circuit (7) rectifying and wave-filtering simultaneously, signal after sampling also sends into governor circuit (9), governor circuit (9) exports control signal to drive circuit (8), carry out PWM (pulse duration) by drive circuit (8) to half-bridge circuit to control, thus control the size of bulb operating current; AD sample circuit (14) is sampled to the direct voltage after output filter circuit (7) rectifying and wave-filtering, signal after sampling sends into microprocessor (13), and signal one tunnel after microprocessor (13) analyzing and processing is sent to digital-scroll technique circuit (16) and shows the voltage and current values that output to mercury lamp (18); One tunnel is sent into audible alarm circuit (15) and is carried out audible alarm to over-voltage and over-current signal; High pressure self-start circuit (17) is sent on one tunnel, controls high voltage conversion circuit (6); Microprocessor (13) is connected with man-machine interaction circuit (12).
2.the special mercury lamp power supply of the innovative microscope of one according to claim 1, it is characterized in that: microprocessor (13) outputs to the current/voltage value in mercury lamp (18) loop by AD sample circuit (14) sampling output filter circuit 7, and is presented on digital-scroll technique circuit (16) in real time; After sample rate current is greater than the electric current of 800mA, microprocessor (13) starts the cumulative time that clocking capability record mercury lamp (18) normally works, stop if the cumulative time equals 1000 little timing constantly and change mercury lamp by the prompting of audible alarm circuit (15) chimes of doom, by man-machine interaction circuit (12) input time after replacing completes, complete machine normally works and lays equal stress on new record service time.
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| CN201420389088.6U CN204482135U (en) | 2014-07-15 | 2014-07-15 | The special mercury lamp power supply of innovative microscope |
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| CN201420389088.6U CN204482135U (en) | 2014-07-15 | 2014-07-15 | The special mercury lamp power supply of innovative microscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014196A (en) * | 2018-08-14 | 2018-12-18 | 厦门五星珑科技有限公司 | The maintenance system and method for 3D metallic print machine |
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2014
- 2014-07-15 CN CN201420389088.6U patent/CN204482135U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014196A (en) * | 2018-08-14 | 2018-12-18 | 厦门五星珑科技有限公司 | The maintenance system and method for 3D metallic print machine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20180715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |