CN103635000B - Lamp protective circuit - Google Patents
Lamp protective circuit Download PDFInfo
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- CN103635000B CN103635000B CN201210296566.4A CN201210296566A CN103635000B CN 103635000 B CN103635000 B CN 103635000B CN 201210296566 A CN201210296566 A CN 201210296566A CN 103635000 B CN103635000 B CN 103635000B
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- relay
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- power supply
- resistance
- resistor
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Abstract
The invention discloses a kind of lamp protective circuits, including light source detection unit, control unit, relay, relay control unit and isolation power supply unit；The electrical signal of the light source detection unit is connected to the electric signal receiving terminal of described control unit, the control signal output of described control unit is connected to the input terminal of the relay control unit, the output end of the relay control unit connects the coil of the relay, the contact series of the relay are connected in trigger circuit, the input terminal of the isolation power supply unit is connected to the input terminal of lamps and lanterns major loop, the output end of the isolation power supply unit is connected respectively to the power input of the light source detection unit, the power input of the power input of described control unit and the relay control unit.The present invention can pair electric part to match with lamps and lanterns protect.
Description
Technical field
The present invention relates to a kind of protection circuits, and in particular to a kind of lamp protective circuit.
Background technology
Gas-discharge lamp is to be discharged by the mixing of gas, metal vapors or several gases and metal vapors and shone
Lamp.Gas-discharge lamp is commonly used to the illumination of factory, beacon, oil field, coal mine, railway etc., and lamp installation height is higher, Maintenance Difficulty
It spends larger.And the electrical system to match at present with gas-discharge lamp can not often detect light source state, when gas-discharge lamp damages
After bad, trigger constantly starts triggering light source, this can cause electric component sparking, breakdown to cause electrical damage.
Invention content
Technical problem to be solved by the invention is to provide a kind of lamp protective circuits, being capable of pair electricity to match with lamps and lanterns
It is protected gas part.
The present invention solves the above problems a kind of lamp protective circuit provided, including：Light source detection unit, control are single
Member, relay, relay control unit and isolation power supply unit；
The electrical signal of the light source detection unit is connected to the electric signal receiving terminal of described control unit, the control
The control signal output of unit processed is connected to the input terminal of the relay control unit, the relay control unit it is defeated
Outlet connects the coil of the relay, and the contact series of the relay are connected in trigger circuit, the isolation power supply
The input terminal of unit is connected to the input terminal of lamps and lanterns major loop, and the output end of the isolation power supply unit is connected respectively to the light
The power input of the power input of source detection unit, the power input of described control unit and the relay control unit
End；
Wherein, the light source detection unit is used to detect the optical signal of lamps and lanterns, and the optical signal is converted into electric signal,
Described control unit generates relay control signal, the relay for receiving the electric signal, and according to the electric signal
Control unit controls opening for the relay for receiving the relay control signal according to the relay control signal
Logical and shutdown, to realize being switched on and off for the trigger circuit, the isolation power supply unit, for exporting direct current
Source.
A kind of realization method of the light source detection unit is, including：First resistor and second resistance；The first resistor
First end be the light source detection unit power input, be connected to the output end of the isolation power supply unit, described the
The second end of one resistance is connected to the first end of the second resistance；The first end of the second resistance is also connected to the control
The electric signal receiving terminal of unit；The second end of the second resistance is connected to ground terminal.
Wherein, the first resistor is photo resistance, and the first resistor is mounted on what only lamps and lanterns light can be irradiated to
Place.
A kind of realization method of the relay control unit is, including：3rd resistor, the 4th resistance, switching tube and three
Pole pipe；The first end of the 3rd resistor is connected to the control signal output of described control unit, the 3rd resistor
Another second end be connected to the base stage of the triode；The source electrode of the switching tube is that the power supply of the relay control unit is defeated
Enter end, be connected to the output end of the isolation power supply unit, the drain electrode of the switching tube is connected to the coil of the relay
First end, the grid of the switching tube are connected to the collector of the triode；4th resistance is connected to the switching tube
Grid and source electrode between；The emitter of the triode is connected to the second end of the coil of the relay, and is connected to and connects
Ground terminal.
It is described isolation power supply unit a kind of realization method be, including：Transformer and rectifier bridge；The primary of the transformer
Coil is connected to the input terminal of the lamps and lanterns major loop, the input terminal of the secondary coil connection rectifier bridge of the transformer, rectification
The output end of bridge is the output end of the isolation power supply unit, is connected respectively to the first end of the first resistor, the switch
The source electrode of pipe and the power input of described control unit.
Wherein, the rectification bridge output end and ground connection can also be connected in parallel in including filter capacitor, the filter capacitor
Between end.
When lamps and lanterns work normally, light source detection circuit detects that normal optical signal, control unit control relay and be attracted,
Trigger circuit triggered as normal.After lamps and lanterns damage, light source detection circuit can't detect optical signal, and light source detection unit the output phase is answered
Electric signal, control unit detects the electric signal and sends out the control signal for disconnecting relay, and relay control unit receives should
Control signal simultaneously disconnects relay, and cut-out trigger circuit makes trigger not trigger repeatedly, to ensure that the electrical of lamps and lanterns
Part will not be damaged or puncture, and realize the purpose of protection electric part.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structure chart for lamp protective circuit that the embodiment of the present invention one provides；
Fig. 2 is a kind of circuit diagram of lamp protective circuit provided by Embodiment 2 of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structure chart for lamp protective circuit that the embodiment of the present invention one provides, including：
Light source detection unit 101, light source detection unit are used to detect the optical signal of lamps and lanterns, and convert optical signals into telecommunications
Number, the electrical signal of light source detection unit is connected to the electric signal receiving terminal of control unit.
Wherein, light source detection unit 101 by detect lamps and lanterns in the on state whether normal luminous by judge lamps and lanterns
Whether damage, light source detection unit 101, which detects optical signal, can use photo resistance or other photosensitive elements.Photo resistance or
The other photosensitive elements of person should can be irradiated to mounted on lamps and lanterns light and other light irradiation less than place, to prevent from judging by accident
It is disconnected.
After control unit receives electric signal, the control signal of relay, control are generated according to electric signal for control unit 102
The control signal output of unit is connected to the input terminal of relay control unit.
Wherein, control unit 102 can be by chip microcontroller, and a sampling pin detection light source detection unit of microcontroller is defeated
The electric signal gone out exports corresponding relay control signal after judging by internal processes.
The contact series of relay 103, relay are connected in trigger circuit, and the coil of relay is connected to relay
The output end of control unit.
Causing the main reason for being damaged with the mating electric part of lamps and lanterns at present is touched when gas-discharge lamp has damaged
Hair device still constantly starts to trigger lamps and lanterns, to cause electric part sparking, breakdown, and then damages electric part.Trigger returns
Road is also often a part for entire electric loop, is disconnected by controlling relay 103, can cut off trigger circuit, to
Entire electric loop is cut off, can achieve the purpose that protect electric part in this way.
Relay control unit 104, relay control unit are turned on and off according to control signal control relay, from
And realize being switched on and off for trigger circuit.
Wherein, relay control unit 104 by control relay coil electric current break-make control trigger circuit, in turn
Realize the protection of electric part.
Power supply unit 105 is isolated, power supply unit is isolated, for exporting DC power supply, the input terminal that power supply unit is isolated connects
It is connected to the input terminal of lamps and lanterns major loop, the output end that power supply unit is isolated is connected respectively to the power input of light source detection unit
It holds, the power input of the power input of control unit and relay control unit.
Isolation power supply unit 105 is the auxiliary power module of circuit, relay control unit, power detecting list in circuit
Member, control unit etc. are required for direct current supply.Isolation power supply unit and the communication power supply of lamps and lanterns, which share, same exchanges forceful electric power
Input, by being converted to direct current light current power supply through rectifier bridge after isolating transformer isolated buck.This power supply mode is realized strong and weak
It is electrically isolated, securely and reliably, and keeps circuit simple, easy to implement without in addition introducing another DC current.
The present embodiment is after lamps and lanterns damage, and light source detection circuit can't detect optical signal, and control unit sends out disconnection relay
The control signal of device, relay control unit receive the control signal and disconnect relay, and cut-out trigger circuit makes trigger
It will not trigger repeatedly, to ensure that the electrical system of lamps and lanterns will not be damaged or puncture, realize the mesh of protection electric part
's.
Referring to FIG. 2, Fig. 2 is a kind of circuit diagram of lamp protective circuit provided by Embodiment 2 of the present invention, the circuit packet
Include following sections：Light source detection unit 101, control unit 102, relay 103, relay control unit 104, isolation power supply
Unit 105.
106 modules are lamps and lanterns major loop, including capacitance C1, ballast L1, trigger T1 and gas-discharge lamp in figure.Lamps and lanterns
Major loop, as power supply, in order to improve the power factor of entire circuit, is connected using AC220V between firewire L, zero curve N
One compensating electric capacity C1.The L feet of trigger T1 are power firestreak foot, are connected with the L lines of power supply by ballast L1；Trigger T1's
LB feet are triggering foot, and gas-discharge lamp is connected between the LB feet of trigger T1 and the N lines of power supply；The N feet of trigger T1 are electricity
Source zero curve foot is connected by relay with power supply N lines, and trigger circuit is constituted.
In the present embodiment, the normally opened contact of relay 103 is connected in series between the N feet of trigger T1 and power supply N lines, is used
In break trigger circuit.
Light source detection unit 101 includes first resistor R1 and second resistance R2, wherein and first resistor is photo resistance, the
Two resistance are divider resistance.The first end of photo resistance R1 is the power input of the light source detection unit, is connected to isolation
The output end of power supply unit, the second end of photo resistance R1 are connected to the first end of divider resistance R2, and the first of divider resistance R2
The electric signal that end is also connected to control unit receives pin, and the second end of divider resistance R2 is connected to ground terminal.Photo resistance is answered
This is fixed on gas-discharge lamp and can be irradiated to, and other light irradiation less than place, to prevent from malfunctioning.
Control unit 102 is realized by microcontroller U1 in the present embodiment, microcontroller model TINY13V.1 foot of U1 is to reset
Pin, 2,7 feet are I/O pins, are not defined to these pins in the present embodiment；3 feet are sampling foot, are connected to divider resistance R2
First end, the electric signal corresponding with lamps and lanterns optical signal for receiving light source detection unit 102；4 feet are grounding pin, even
It is connected to ground terminal；6 feet are an I/O feet, and signal is controlled for output relay, are connected to the input of relay control control unit
End；8 feet are supply pin, the i.e. power input of control unit, are connected to the output end of isolation power supply unit to be supplied to microcontroller
Electricity.Certainly, control unit can also can be met other model microcontrollers that the present invention applies by resource, or by logic circuit
It realizes, does not repeat one by one here.
Relay control unit 104 includes：3rd resistor R3, the 4th resistance R4, switching tube Q1 and triode Q2, this implementation
Switching tube Q1 selects P-channel metal-oxide-semiconductor in example.The first end of resistance R3 is connected to 6 feet of U1, and second end is connected to triode Q2's
Base stage；The source electrode of switching tube Q1 is the power input of relay control unit, is connected to the output end of isolation power supply unit, opens
The drain electrode of pass pipe Q1 is connected to the first end of the coil of relay, and grid is connected to the collector of triode Q2；Resistance R4 connections
Between the grid and source electrode of switching tube Q1；The emitter of triode Q2 connects the second end of the coil of relay and ground connection.
Power supply unit 105, which is isolated, includes：Transformer BT1 and rectifier bridge Z1.The primary coil of transformer BT1 is connected to lamps and lanterns
The input terminal of major loop, with lamps and lanterns major loop share AC220V be used as power supply, i.e., primary coil connection AC220V firewires L with
Between zero curve N, it is connected to the input terminal of rectifier bridge Z1 in the secondary coil of transformer BT1, that is, two exchanges for connecting rectifier bridge are defeated
Enter between pin；The output end of rectifier bridge Z1 is the output end that power supply unit is isolated, and is connected respectively to the first end of photo resistance R1,
The source electrode of switching tube Q1 and 8 feet of microcontroller U1.Bridge heap may be used in rectifier bridge, can also build rectifier bridge by 4 diodes.
It can be in one filter capacitor C2 of rectification bridge output end parallel connection to improve the quality of DC power supply.
After powering on, microcontroller U1 is handled by internal processes, and 3 feet can be allowed to be delayed several seconds and sampled, 6 feet keep high
Level, at this time triode Q2, switching tube Q1 be both turned on, be added to voltage and current on relay coil pin meet relay actuation
Condition, 103 normally opened contact of relay be attracted, trigger circuit conducting, triggering gas-discharge lamp start.
Delay time arrives, and microcontroller U1 starts whether sample gas discharge lamp shines, if gas-discharge lamp normal luminous, light
Quick resistance R1 resistance values become very little, and the pressure drop on divider resistance R2 increases, and the voltage that 3 feet of microcontroller U1 sample is high electricity
Flat, microcontroller U1 is handled by internal processes, and 6 feet of control export high level, and 103 normally opened contact of relay is closed, and trigger returns
Road is connected, lamps and lanterns major loop normal work.If gas-discharge lamp damages, photo resistance is irradiated without light source, then photo resistance R1
Resistance value becomes very big, and the pressure drop on divider resistance R2 becomes smaller, and the voltage that microcontroller U1 is sampled becomes low level, microcontroller U1
It is handled by internal processes, 6 feet of control export low level, and triode Q2, switching tube Q1 become ending from being connected, and are added to relay
Voltage and current cannot meet the condition of relay actuation on coil, and relay normally open contact disconnects, to which trigger circuit is disconnected
It opens, trigger would not export trigger pulse again, and circuit enters guard mode, and after more finishing changing lamps and lanterns, circuit could again
Work.
The present embodiment cuts off trigger circuit, so that trigger is not triggered repeatedly, to ensure that lamp after lamps and lanterns damage
The electrical system of tool will not be damaged or puncture, and realize the purpose of protection electric part.This implementing circuit design principle is simple,
Peripheral electric elements are few, and using vulnerabilities scan forceful electric power, power is electrically isolated, and circuit stability is reliable.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (4)
1. a kind of lamp protective circuit, which is characterized in that be used for the electric part of protective gas discharge lamp, the lamps and lanterns protection electricity
Road includes：Light source detection unit, control unit, relay, relay control unit and isolation power supply unit；
The electrical signal of the light source detection unit is connected to the electric signal receiving terminal of described control unit, and the control is single
The control signal output of member is connected to the input terminal of the relay control unit, the output end of the relay control unit
The coil of the relay is connected, the contact series of the relay are connected in trigger circuit, the isolation power supply unit
Input terminal be connected to the input terminal of lamps and lanterns major loop, the output end of the isolation power supply unit is connected respectively to the light source inspection
Survey the power input of the power input of unit, the power input and the relay control unit of described control unit；
Wherein, the light source detection unit includes：First resistor and second resistance, the first resistor is photo resistance, described
Second resistance is divider resistance；The first end of the first resistor is the power input of the light source detection unit, is connected to
The output end of the isolation power supply unit, the second end of the first resistor is connected to the first end of the second resistance, described
The first end of second resistance is also connected to the electric signal receiving terminal of described control unit, and the second end of the second resistance is connected to
Ground terminal；The relay control unit includes：3rd resistor, the 4th resistance, switching tube and triode；The 3rd resistor
First end is connected to the control signal output of described control unit, and the another second end of the 3rd resistor is connected to described
The base stage of triode；The source electrode of the switching tube is the power input of the relay control unit, is connected to the isolation
The output end of power supply unit, the drain electrode of the switching tube are connected to the first end of the coil of the relay, the switching tube
Grid is connected to the collector of the triode；4th resistance is connected between the grid and source electrode of the switching tube；Institute
State triode emitter be connected to the relay coil second end, and be connected to ground terminal；The light source detection list
Optical signal of the member for detecting lamps and lanterns, and the optical signal is converted into electric signal, described control unit is for receiving the electricity
Signal, and relay control signal is generated according to the electric signal, the relay control unit is for receiving the relay
Signal is controlled, and turning on and off for the relay is controlled according to the relay control signal, to realize the triggering
Device circuit is switched on and off, the isolation power supply unit, for exporting DC power supply.
2. circuit according to claim 1, which is characterized in that the first resistor is photo resistance, the first resistor
Mounted on the place that only lamps and lanterns light can be irradiated to.
3. circuit according to claim 1, which is characterized in that the isolation power supply unit includes：Transformer and rectifier bridge；Institute
The primary coil for stating transformer is connected to the input terminal of the lamps and lanterns major loop, and the secondary coil of the transformer connects rectifier bridge
Input terminal, the output end of rectifier bridge is the output end of the isolation power supply unit, is connected respectively to the of the first resistor
One end, the source electrode of the switching tube and described control unit power input.
4. circuit according to claim 3, which is characterized in that further include filter capacitor, the filter capacitor is connected in parallel in
Between the rectification bridge output end and ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210296566.4A CN103635000B (en) | 2012-08-20 | 2012-08-20 | Lamp protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210296566.4A CN103635000B (en) | 2012-08-20 | 2012-08-20 | Lamp protective circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103635000A CN103635000A (en) | 2014-03-12 |
| CN103635000B true CN103635000B (en) | 2018-08-07 |
Family
ID=50215489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210296566.4A Active CN103635000B (en) | 2012-08-20 | 2012-08-20 | Lamp protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103635000B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107072011A (en) * | 2017-05-22 | 2017-08-18 | 南京泰杰赛智能科技有限公司 | A kind of intelligent illuminating switch controller with loop electric parameter measurement |
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| CN2781713Y (en) * | 2004-09-20 | 2006-05-17 | 王建培 | Energy-saving control and lamp current station detection circuit of high-pressure gas discharge lamp |
| CN2932912Y (en) * | 2006-01-23 | 2007-08-08 | 达方电子股份有限公司 | Light tube driving circuit |
| CN101217098A (en) * | 2007-12-26 | 2008-07-09 | 北京东西分析仪器有限公司 | A light source of UHF electrodeless discharge lamp |
| CN201178514Y (en) * | 2008-03-21 | 2009-01-07 | 刘石劬 | Alarm light exception monitoring apparatus |
| CN201178501Y (en) * | 2008-04-09 | 2009-01-07 | 谭启仁 | Intelligent management system for district road lamp |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025790A (en) * | 2000-07-12 | 2002-01-25 | Koito Mfg Co Ltd | Discharge lamp lighting circuit |
| JP3918151B2 (en) * | 2002-08-28 | 2007-05-23 | ミネベア株式会社 | Discharge lamp lighting circuit |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781713Y (en) * | 2004-09-20 | 2006-05-17 | 王建培 | Energy-saving control and lamp current station detection circuit of high-pressure gas discharge lamp |
| CN2932912Y (en) * | 2006-01-23 | 2007-08-08 | 达方电子股份有限公司 | Light tube driving circuit |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
| CN101217098A (en) * | 2007-12-26 | 2008-07-09 | 北京东西分析仪器有限公司 | A light source of UHF electrodeless discharge lamp |
| CN201178514Y (en) * | 2008-03-21 | 2009-01-07 | 刘石劬 | Alarm light exception monitoring apparatus |
| CN201178501Y (en) * | 2008-04-09 | 2009-01-07 | 谭启仁 | Intelligent management system for district road lamp |
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| CN103635000A (en) | 2014-03-12 |
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