CN106455184A - Fire-fighting intelligent emergency light fixture for meeting multiple bus communication modes without using power supply chip - Google Patents
Fire-fighting intelligent emergency light fixture for meeting multiple bus communication modes without using power supply chip Download PDFInfo
- Publication number
- CN106455184A CN106455184A CN201610265973.7A CN201610265973A CN106455184A CN 106455184 A CN106455184 A CN 106455184A CN 201610265973 A CN201610265973 A CN 201610265973A CN 106455184 A CN106455184 A CN 106455184A
- Authority
- CN
- China
- Prior art keywords
- power supply
- light fixture
- bus communication
- power
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
With the adoption of a single-chip computer PWM technology and a general switching power supply voltage-reducing circuit, a 24V direct current power supply is converted into a power supply required by a light fixture for working, and a MCU and LED lamp beads of the light fixture are powered. Software resources of a single-chip microcomputer are fully utilized, the conversion efficiency is high, the required semiconductor devices are few, and the light fixture is green and environment-friendly. An illuminating lamp is large in power, the single-chip computer PWM controls a 24V power supply to be converted to 12V power supply for supplying power to large-power LEDs of the illuminating lamp, and LED switching control and power supply conversion functions of the illuminating lamp are integrated into one body, so that a large-power switching power supply chip is saved. The periphery of the MCU of the light fixture is provided with a uniform bus communication module interface, so that a user can select different bus communication modes according to system requirements without redesigning a circuit board of the light fixture.
Description
Technical field
It is applied to Intelligent fire-fighting illumination and evacuation indication system, be the primary terminal equipment in system, including lighting
And indicating lamp.
Background technology
Intelligent fire-fighting illumination and evacuation indication system, be the system that state compulsion is installed, comprise numerous in a system
Lighting and indicating lamp, installation site has a very wide distribution, therefore system wiring cost, and the hardware cost of terminal directly affects
Construction cost to system.The invention provides one and realize power voltage step down by SCM PWM control technology, save terminal
Power supply chip, reduce terminal hardware cost, in addition, a whole set of light fixture scheme of the present invention but to adapt to common RS485 total
Line communicates, multiple bus communication pattern such as FSK carrier communication, OOK carrier communication, communication, power line pwm pulse coupled communication,
Suitable communication mode can be selected according to field condition and system Construction cost requirement, change communication pattern and only need to change difference
Communication module, the hardware circuit of light fixture mainboard need not be changed.Communication module uses the packing forms of unified standard, does not therefore disobey
The coherence request of back of the body light fixture examination criteria, this design can effectively save testing cost and time.
Content of the invention
As shown in Figure 1, the fire fighting lamp of the present invention is turned 5V power circuit PWM control unit, LED by MCU, 24V
The part composition such as pearl control unit, bus communication interface unit, voice and other miscellaneous function unit.Now practical light fixture
Power unit is all to use DC decompression switching power source chip to realize, switching power source chip price is without the sky reducing
Between, the significant fraction of lamp circuit and the cost of switching power source chip has accounted for, therefore the circuit cost of light fixture almost without
The space reducing further.The present invention makes full use of mcu resource, uses SCM PWM technology and general Switching Power Supply fall
24V dc source as shown in Figure 4, is converted into direct current 5V power supply by volt circuit, powers to the MCU of light fixture and LED lamp bead.Right
In lighting, power is bigger, present invention also offers and is turned 12V power supply to lighting by the 24V that SCM PWM controls
Great power LED is powered, and as shown in Figure 6, by integrated to LED switch control and the power source conversion function of lighting, saves
High power switching power supply chip.The MCU periphery of light fixture provides unified bus communication module interface, such as accompanying drawing 2 and accompanying drawing 3 institute
Showing, user can select different bus communication modes need not redesign lamp circuit board according to system requirements.
Brief description
Fig. 1 is fire fighting lamp schematic diagram.
Fig. 2 is lighting lamp for fire service tool MCU peripheral circuit schematic diagram.
Fig. 3 is fire-fighting indicating lamp MCU peripheral circuit schematic diagram.
Fig. 4 is that lighting lamp for fire service tool 24V passes 5V circuit theory diagrams.
Fig. 5 is lighting lamp for fire service tool LED lamp bead control circuit schematic diagram.
Fig. 6 is that band pronunciation type fire-fighting indicating lamp is powered and LED lamp bead control circuit schematic diagram.
Fig. 7 is fire-fighting indicating lamp sound circuit schematic diagram.
Fig. 8 is to power and LED lamp bead control circuit schematic diagram without pronunciation type fire-fighting indicating lamp.
Detailed description of the invention
Light fixture normally to work, it is necessary to assure having stable working power, as shown in Figure 4,24V dc source is by electricity
Resistance R1, voltage-stabiliser tube D7 and triode Q4 voltage stabilizing obtain 5V power supply and power to single-chip microcomputer, and first single-chip microcomputer starts PWM function after starting
Excitation is made up of resistance R10, triode Q3, resistance R6, R7, triode Q1, inductance L1, electric capacity C2, Schottky diode D4
Switching Power Supply reduction voltage circuit produces the stable 5V power supply being available for the work of all circuit.After Switching Power Supply starts, Zener diode
D7 and triode Q4 plays FEEDBACK CONTROL effect, and when load lightens, when 5V voltage raises, Zener diode D7 turns on, and Q4 turns on, Q3
Closing, Q1 ON time narrows, and diminishes to the electric current of electric capacity C2 charging, and 5V out-put supply reduces, thus ensure that 5V work electricity
The stable output in source.
Single-chip microcomputer can be calculated the exact value of work 5V operating voltage by the reference voltage of sampling, thus changes PWM
Export to obtain dutycycle, increase the stability of 5V operating voltage further.The sampling of reference voltage is as shown in accompanying drawing 2 and accompanying drawing 3.
In accompanying drawing 6 and accompanying drawing 8, LED lamp bead and single-chip microcomputer operating voltage are 3.3V, and single-chip microcomputer controls PWM3V3's after starting
Dutycycle ensures the stable output of 3.3V, and accompanying drawing 6 also has a road 5V output for the work of voice amplification chip, and single-chip microcomputer is by changing
The dutycycle of PWM5V ensures the stable output of 5V.Three groups of LED lamp bead of signal light are independently controlled by the three of single-chip microcomputer I/O ports
System, thus single-chip microcomputer according to server instruction when freely point to, the malfunction of three groups of LED lamp bead is by three AD thief hatch independences
Sampling obtains the voltage being applied in LED lamp bead.When LED lamp bead short circuit, sampled voltage is close to 0V, thus correctly detects
LED short trouble；When LED lamp bead open circuit, 24V power supply is applied to LED terminal by resistance R2, R3, R4 so that sampled voltage
The voltage 3.3V of the normal work much larger than LED, thus correctly detect LED open fault.
In accompanying drawing 5, the light source of lighting is connected by 3 ~ 4 LEDs, and operating voltage range 10V ~ 12V is produced by single-chip microcomputer
Pwm signal (17 pin, PWM12V) controls Switching Power Supply reduction voltage circuit, and operation principle is the same with the switching power circuit in accompanying drawing 4,
The voltage producing 10V ~ 12V is powered to LED lamp bead, and single-chip microcomputer passes through AD thief hatch（19 pin, AD_12V）Sampling is by Switching Power Supply
10V ~ 12V the voltage signal producing, adjusts PWM and exports to obtain dutycycle, be supplied to the suitable operating voltage of LED lamp bead.Single-chip microcomputer
The also real work voltage of sampling LED（20 pin, AD_LED）, when LED lamp bead short circuit, sampled voltage is close to 0V, thus correctly
Detect LED short trouble；When LED lamp bead open circuit, 24V power supply can be remote by the voltage that resistance R5 is applied on LED terminal
It more than the normal working voltage of LED, thus is correctly detected out LED open fault.
As shown in Figure 7, single-chip microcomputer is according to server instruction control for the voice control circuit of the signal light with phonetic function
Speech chip processed plays voice.
Bus communication module interface P1 and P2 in accompanying drawing 2 and accompanying drawing 3, by+24V, TXEN, TXD, RXD, RXEN ,+5V,
GND, A, B, ~ 24VN, ~ 24VP pin composition, can meet the interface requirement of all of bus communication module.Wherein ~ 24VN, ~
24VP provides power line communication module interface, and A, B provide independent signal line interface.TXD, RXD pass through short circuit resistance（In accompanying drawing 2
R20, R21, R23, R24, R13, R16, R17, the R18 in accompanying drawing 3）Select PWM communication pattern or common serial interface communication mode,
The module that can meet different communication modes requires.
Claims (2)
1. the present invention comprises SCM PWM Switching Power Supply reduction voltage circuit principle and PWM software controlling technique.
2. the present invention comprises the power circuit powered of LED lamp bead to lighting and lamp bead control, failure detector circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610265973.7A CN106455184A (en) | 2016-04-27 | 2016-04-27 | Fire-fighting intelligent emergency light fixture for meeting multiple bus communication modes without using power supply chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610265973.7A CN106455184A (en) | 2016-04-27 | 2016-04-27 | Fire-fighting intelligent emergency light fixture for meeting multiple bus communication modes without using power supply chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106455184A true CN106455184A (en) | 2017-02-22 |
Family
ID=58183167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610265973.7A Pending CN106455184A (en) | 2016-04-27 | 2016-04-27 | Fire-fighting intelligent emergency light fixture for meeting multiple bus communication modes without using power supply chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106455184A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811531A (en) * | 2011-06-02 | 2012-12-05 | 海洋王照明科技股份有限公司 | Step-down LED driving circuit and lamp |
| CN103096586A (en) * | 2012-12-29 | 2013-05-08 | 广东卓耐普智能技术股份有限公司 | Light-dimmer driving circuit |
| US20130134783A1 (en) * | 2011-05-31 | 2013-05-30 | Shahriyar Mohammediyan | Adaptive load circuit |
| CN203423832U (en) * | 2013-08-28 | 2014-02-05 | 成都信鑫信息技术有限公司 | Solar energy street lamp system based on one-chip microcomputer control |
-
2016
- 2016-04-27 CN CN201610265973.7A patent/CN106455184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130134783A1 (en) * | 2011-05-31 | 2013-05-30 | Shahriyar Mohammediyan | Adaptive load circuit |
| CN102811531A (en) * | 2011-06-02 | 2012-12-05 | 海洋王照明科技股份有限公司 | Step-down LED driving circuit and lamp |
| CN103096586A (en) * | 2012-12-29 | 2013-05-08 | 广东卓耐普智能技术股份有限公司 | Light-dimmer driving circuit |
| CN203423832U (en) * | 2013-08-28 | 2014-02-05 | 成都信鑫信息技术有限公司 | Solar energy street lamp system based on one-chip microcomputer control |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |