CN101316467A - Duplexed LED point type light source colour lamp signal machine control circuit - Google Patents
Duplexed LED point type light source colour lamp signal machine control circuit Download PDFInfo
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- CN101316467A CN101316467A CNA2008100337518A CN200810033751A CN101316467A CN 101316467 A CN101316467 A CN 101316467A CN A2008100337518 A CNA2008100337518 A CN A2008100337518A CN 200810033751 A CN200810033751 A CN 200810033751A CN 101316467 A CN101316467 A CN 101316467A
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Abstract
The invention relates to a control circuit that is used in a double LED pointolite color light signal and comprises a lighting control part, a failure testing part and a power supply part. The control circuit also comprises an LED main light source loop and an LED auxiliary light source loop which are respectively composed of the three parts. A lighting transformer is secondarily connected in parallel with a current matcher of the lighting transformer, thus causing the primary current value to reach the rated range which ensures that a filament relay can work normally. The control circuit adopts constant current power supply so as to eliminate the influence on the current value of the LED loops caused by voltage fluctuation. A current detecting chip and a current sampling resistance are adopted and connected in parallel so as to form a detection unit which is connected in series to the LED main light source loop, and the anode of the LED main light source loop is taken as a voltage detecting point. When open circuit or short circuit occurs to the LED main light source loop, the output value of a detecting circuit changes accordingly and controls the output state of a comparator, thus further controlling opening or closing a switch MOS conduit in the loop and realizing the switch between a main light source and an auxiliary light source and failure warning. When railway signal lamps are replaced by the LED, the existing circuit equipment are not necessary to be changed, which ensures the reliability of a signal interlocking circuit.
Description
Technical field
The present invention relates to railway light signal and lighting control circuit thereof, two monitoring and controls of overlapping point type railway light signals of particularly adopting the great power LED luminescent device to make.
Technical background
For a long time, railway signal lamp with incandescent lamp as signal optical source.In incandescent lamp semaphore power supply circuits, be in series with the filament relay of a supervision filament operating state, its effect is to detect the electric current that flows into semaphore, have only flow into semaphore electric current just often, this filament relay ability adhesive, its adhesive represents that semaphore is working properly.Filament relay has used decades at railway signal system, and it is the approved product of dependable performance.In recent years, progressively replacing the incandescent lamp semaphore with LED as the light signal of light source.And the power consumption of led light source semaphore has only about 1/3rd of incandescent lamp semaphore, if still adopt the alternating current 220V power voltage supply, electric current can reduce about 2/3rds.After led light source semaphore supply current reduces, can cause the signal chain circuit filament relay can not adhesive, the signal chain circuit cisco unity malfunction.For making signal chain circuit unaffected, so in technological transformation, be the power supply circuits that are used for the led light source semaphore after the filament relay operating current is reduced mostly.But this way because operating current and release current difference are less than normal, causes the work of filament relay unreliable, and in growing apart from power supply circuits, filament relay can not reliably fall after the light source of railway signal lamp opened circuit, and promptly broke down and did not report to the police, and therefore had hidden danger.For this reason, prior art, a kind of " control circuit that is used for the led light source light signal " disclosed as Chinese patent ZL 200520019916.8, adopt following measure: the one, voltage in parallel and threshold relay at the power line two ends, in case the stop signal machine when not working interference signal cause led light source signal chance error to show by cable input signal machine; The 2nd, at the other photoresistance cell that is equipped with of LED main light source, when photoresistance cell detects less than luminous signal, change immediately and light secondary light source of LED and warning; The 3rd, extract the power transformer output out the 72V tap, the JZXC-H18 type filament relay of connecting original inserts lighting unit and fault detection unit again, promptly takes to reduce the measure of supply voltage of lighting a lamp, the holding point lamp current is constant, to guarantee the signal chain circuit operate as normal.But this technical scheme is opened short-circuit detecting at LED and is adopted photo resistance, and this detection mode is subject to external disturbance, also has hidden danger; Also have, led light source is failed the constant current power supply, and the constant current power supply is to guaranteeing that the stable of LED brightness and spectrum is very important; Have, this technical scheme still needs original power transformer is transformed again.
Summary of the invention
The object of the present invention is to provide a kind of safe and reliable, need not to change existing railway signal interlocking circuit equipment and have LED signal optical source constant current function of supplying power, be applicable to the semaphore control circuit that two cover LED point type light sources are lit a lamp and needed.
In order to realize described purpose, the technical solution used in the present invention is: design a kind of two cover LED point type light source colour modulating signal machine control circuits that are applicable to, comprise power unit, the control section of lighting a lamp, fault detection part and the LED main light source loop and the secondary light source of the LED loop that are made of described three parts respectively.
Described power unit comprises the transformer of lighting a lamp, the transformer current of lighting a lamp adaptation, power module.The described transformer current adaptation of lighting a lamp { hereinafter to be referred as the currents match device } is connected in parallel on the described two ends that exchange output at the transformer secondary output of lighting a lamp, this currents match device one end directly is connected with an end of the transformer secondary output of lighting a lamp, and the other end is connected with the other end of the transformer secondary output of lighting a lamp by the state relay normally open contact of lighting a lamp.Adopting the purpose of currents match device is when railway signal lamp is lighted, by the state relay making current adaptation of lighting a lamp, the feasible primary current value of lighting a lamp reaches filament relay rated range in the chain circuit of signal, guaranteed filament relay reliably working in the signal chain circuit, realized the seamless replacement of led light source conventional incandescent signal optical source circuit structure.
The described control section of lighting a lamp comprises switch MOS pipe, constant current unit, LED main light source, the secondary light source of LED, the state relay of lighting a lamp, light source switching relay.Described constant current unit is composed in series by constant current tube and current-limiting resistance, and is connected on respectively in described main light source loop and the described secondary light source loop, to reach the purpose to the major and minor led light source constant current power supply of semaphore.The current constant in led light source loop is the stable key of luminosity that guarantees led light source, is regulated by the constant current unit when voltage fluctuation, thereby eliminates the influence of voltage fluctuation to the LED loop current value.The described state relay of lighting a lamp is provided with normal opened contact, and described light source switching relay is provided with normally closed contact.
Described fault detection part comprises detecting unit, two comparators, corresponding to the comparator input resistance of these two comparators, described two comparators and corresponding comparator input resistance are connected in the described LED main light source loop.Described detecting unit is composed in parallel by current detecting chip and current sampling resistor, is connected in the described LED main light source loop, is used for detecting the electric current in LED main light source loop, and this size of current can reflect directly whether the LED main light source is normal; And as the voltage detecting point, being used to detect LED main light source loop has not short trouble with LED main light source positive pole.When electric current or test point current potential change in the LED main light source loop, the output valve of described detecting unit also changes thereupon, control the output state of described two comparators respectively by the output signal of this detecting unit, opening or closing of switch MOS pipe in the equal may command LED main light source of the output state of the arbitrary comparator loop, control the adhesive of light source switching relay or fall by opening or closing of switch MOS pipe, thereby realize the conversion and the fault alarm of major-minor light source.
Described main light source loop includes DC power supply, switch MOS pipe, constant current unit, detecting unit, two comparators, corresponding to the comparator input resistance and the LED main light source of described two comparators; Described secondary light source loop includes the secondary light source of DC power supply, constant current unit, light source switching relay and LED.
The supply and AC 220V power supply of lighting a lamp obtains direct current 12V power supply after described light a lamp transformer step-down and described power module rectification, this DC power supply is connected to semaphore LED main light source by described switch MOS pipe, constant current unit, current sampling resistor, light the LED main light source, described LED main light source loop is connected.When break down in LED main light source loop, detecting unit, comparator and the effect of comparator input resistance through the main light source loop, switch MOS pipe in the LED main light source loop is closed automatically, DC power supply is connected to the secondary light source of LED by normally closed contact, the constant current unit of light source switching relay, light the secondary light source of LED, the secondary light source of described LED loop is connected, and finishes the output of LED main light source fault alarm by the normally closed contact of light source switching relay.
The present invention has following beneficial effect compared with the prior art:
1. adopt the transformer current adaptation of lighting a lamp, the feasible primary current value of lighting a lamp reaches the rated range of filament relay operate as normal in the chain circuit of signal, realized when railway signal lamp light source is used LED instead, can not change the electrical characteristic of the filament relay in the signal chain circuit, the purpose of light a lamp supply power voltage and filament remote alarm interface circuit, guarantee the reliability of signal chain circuit.
2. adopt the constant current powering mode, guarantee the stable of led light source brightness and spectrum.
3.LED directly supervision LED main light source current in loop or voltage are adopted in the main light source fault detect, detect LED main light source loop open circuit or short trouble, this detection method accurately, reliably.
Below in conjunction with accompanying drawing one embodiment of the present of invention are elaborated.
Description of drawings
The schematic diagram during work of accompanying drawing 1 semaphore main light source;
Schematic diagram during accompanying drawing 2 semaphores pair light source works.
Among the figure
The T1 transformer of lighting a lamp
The R transformer current adaptation of lighting a lamp
The U2 power module
Q1 switch MOS pipe
The U3 constant current tube
The ZLED main light source
The secondary light source of FLED
The R1 current-limiting resistance
The R2 current sampling resistor
The U4 constant current tube
The R3 current-limiting resistance
U5 current detecting chip
R7 comparator input resistance
The U1B comparator
R8 comparator input resistance
The U1A comparator
The D1 voltage-stabiliser tube
The D2 isolating diode
The D3 isolating diode
The D4 isolating diode
The D5 isolating diode
The R9 divider resistance
The R4 divider resistance
The R5 divider resistance
The R6 divider resistance
The R10 divider resistance
The R11 divider resistance
The R12 divider resistance
The R13 divider resistance
K1 light source switching relay
The K2 state relay of lighting a lamp
Specific implementation method
Referring to accompanying drawing 1, by the railway signal building supply and AC 220V that lights a lamp, it is elementary that this power supply is connected to the transformer T1 that lights a lamp, earlier through after the T1 step-down, by T1 time grade of output AC 13V of the transformer power supply of lighting a lamp.The end of the transformer current of lighting a lamp adaptation R directly is connected with the end that T1 the level of transformer of lighting a lamp exchanges output, and the other end is connected with the other end that T1 the level of transformer of lighting a lamp exchanges output by state relay K 2 normal opened contacts " K212 " of lighting a lamp.T1 the level of transformer of lighting a lamp output AC 13V power supply is connected with " L ", " N " end of power module U2, will exchange 13V by power module U2 and change direct current 12V output into.Direct current 12V is anodal to be connected with the end (1,2,3 pin) of switch MOS pipe Q1.The other end of switch MOS pipe Q1 (5,6,7,8 pin) is connected with the input " IN " of constant current tube U3, and constant current tube U3 output " OUT " is connected with the end of current-limiting resistance R1.The other end of current-limiting resistance R1 is connected with " ADJ " end of constant current tube U3, " RS+ " end of current detecting chip U5 and the end of current sampling resistor R2, the other end of current sampling resistor R2 is connected with the end of " RS-" end, semaphore main light source ZLED light-emitting diode "+" end and the comparator input resistance R8 of current detecting chip U5, and the other end of resistance R 8 is connected with "-" end of comparator U1A.Main light source ZLED light-emitting diode "-" termination dc power cathode." OUT " end of current detecting chip U5 i.e. " OUT3 " is connected with the end of comparator input resistance R7, and the other end of resistance R 7 is connected with "-" end of comparator U1B.Referring to accompanying drawing 2, the input of constant current tube U4 " IN " is connected with the normally closed contact of light source switching relay K1, the other end of this group normally closed contact is connected with direct current 12V positive source, constant current tube U4 output " OUT " is connected with the end of current-limiting resistance R3, and the other end of resistance R 3 is connected with " ADJ " end and the secondary light source FLED light-emitting diode of semaphore "+" end of constant current tube U4.Secondary light source FLED light-emitting diode "-" termination dc power cathode.
Referring to accompanying drawing 1, when switching on moment, 4 pin of switch MOS pipe Q1 are in low level, open switch MOS pipe Q1, DC power supply 12V is connected to the input " IN " of constant current tube U3 through 5,6,7,8 pin of 1,2,3 pin of switch MOS pipe Q1 and switch MOS pipe Q1, and constant current tube U3 and current-limiting resistance R1 are composed in series the constant current unit.The detecting unit that the constant-current source of the 350mA of this constant current unit output composes in parallel via current detecting chip U5 and current sampling resistor R2, be connected to semaphore main light source ZLED "+" utmost point, light semaphore main light source ZLED.At this moment, light source switching relay K1 is in attracting state, and the 12V DC power supply through isolating diode D4 to lighting a lamp state relay K 2, make the state relay K 2 of lighting a lamp be in attracting state, the transformer current of lighting a lamp adaptation R connects.Detecting unit current sampling resistor R2 signal is connected to comparator input resistance R7 by the output " OUT " of current detecting chip U5, holds to comparator U1B "-" again.With semaphore main light source ZLED "+" utmost point as voltage monitoring point, be used to detect LED main light source loop not short trouble is arranged, this voltage monitoring point signal is connected to comparator input resistance R8 by testing circuit output " OUT1 ", holds to comparator U1A "-" again.DC power supply 12V can connect the constant current unit of being made up of constant current tube U4 and current-limiting resistance R3, the secondary light source FLED loop of semaphore by the normally closed contact of light source switching relay K1.When semaphore main light source ZLED breaks down, be connected to secondary light source luminescent diode "+" utmost point of semaphore by the constant-current source of the 350mA of this constant current unit output, light the secondary light source FLED of semaphore.
Referring to accompanying drawing 2, when open a way in semaphore main light source ZLED loop, make comparator U1B output signal through isolating diode D2 and divider resistance R4, R5, R6 by the signal of detecting unit output " OUT " output, control switch metal-oxide-semiconductor Q1 shutoff signal machine main light source ZLED loop, close ZLED, light source switching relay K1 is fallen, connect the FLED loop and light the secondary light source of semaphore.When semaphore main light source ZLED short circuit, voltage detecting point output signal is connected to comparator U1A "-" end by output " OUT1 " by R8, the output signal of comparator U1A is by isolating diode D3 and divider resistance R5 control switch metal-oxide-semiconductor Q1 shutoff signal machine main light source ZLED loop, close ZLED, light source switching relay K1 is fallen, connect the FLED loop and light the secondary light source of semaphore.In the circuit, by one group of normally closed contact of FLED loop light source switching relay K1 as ZLED open circuit, the warning output condition of short circuit, when open circuit or short trouble take place in semaphore main light source ZLED loop, in the secondary light source FLED of connection signal machine loop, the 12V DC power supply through light source switching relay K1 normally closed contact, isolating diode D5 to the state relay K 2 of lighting a lamp, make the state relay K 2 of lighting a lamp be in attracting state, the transformer current of lighting a lamp adaptation R connects.Therefore no matter semaphore main light source or secondary light source igniting, the transformer current of lighting a lamp adaptation R all can be connected by one group of normal opened contact of the state relay K 2 of lighting a lamp, and the feasible transformer T1 primary current value of lighting a lamp reaches filament relay operate as normal rated range in the chain circuit of signal.Divider resistance R9 in the circuit and voltage-stabiliser tube D1 generate a reference voltage, this reference voltage is through divider resistance R12 and the divider resistance R13 voltage after partial reference voltage of device U1B as a comparison, again through divider resistance R10 and the divider resistance R11 voltage after partial reference voltage of device U1A as a comparison.
Claims (4)
1. be used for two cover LED point-source of light light signal control circuits, comprise power unit, the control section of lighting a lamp, fault detection part and the LED main light source loop and the secondary light source of the LED loop that are constituted by described three parts respectively, it is characterized in that: described power unit comprises the transformer of lighting a lamp (T1), the transformer current of lighting a lamp adaptation (R), power module (U2), and the described transformer current adaptation (R) of lighting a lamp is connected in parallel on described two ends in the secondary interchange output of the transformer of lighting a lamp (T1); The described control section of lighting a lamp comprises switch MOS pipe (Q1), constant current unit, LED main light source (ZLED), the secondary light source (FLED) of LED, the state relay (K2) of lighting a lamp, light source switching relay (K1), described constant current unit is composed in series by constant current tube (U3, U4) and current-limiting resistance (R1, R3), and is connected on respectively in described LED main light source loop and the secondary light source of the described LED loop; Described fault detection part comprises detecting unit, two comparators (U1A, U1B), corresponding to the comparator input resistance (R8, R7) of these two comparators, described two comparators (U1A, U1B) and corresponding comparator input resistance (R8, R7) are connected in the described LED main light source loop, described detecting unit is composed in parallel by current detecting chip (U5) and current sampling resistor (R2), be connected in the described LED main light source loop, and with LED main light source positive pole as the voltage detecting point; The secondary light source of described LED main light source loop and LED loop comprises LED main light source (ZLED) and the secondary light source (FLED) of LED respectively.
2. pair cover LED point-source of light light signal control circuits that are used for according to claim 1, it is characterized in that: the described control section of lighting a lamp also comprises the state relay (K2) of lighting a lamp, it is provided with normal opened contact (K212), one end of the described transformer current adaptation (R) of lighting a lamp directly is connected with the secondary end that exchanges output of the transformer of lighting a lamp (T1), and the other end is connected with the secondary other end that exchanges output of the described transformer of lighting a lamp (T1) by described state relay (K2) normal opened contact (K212) of lighting a lamp.
3. pair cover LED point-source of light light signal control circuits that are used for according to claim 1, it is characterized in that: described LED main light source loop includes DC power supply, switch MOS pipe (Q1), the constant current unit, detecting unit, two comparator (U1A, U1B), corresponding to described two comparator (U1A, U1B) comparator input resistance (R8, R7) and main light source (ZLED), one end of described switch MOS pipe (Q1) is connected with the positive pole of direct current, its other end is connected with the input (IN) of constant current tube (U3), this constant current tube (U3) output (OUT) is connected with an end of current-limiting resistance (R1), the ADJ end of the other end of this current-limiting resistance (R1) and described constant current tube (U3), the RS+ end of current detecting chip (U5) and an end of current sampling resistor (R2) are connected, the RS-end of the other end of current sampling resistor (R2) and current detecting chip (U5), main light source (ZLED) light-emitting diode+end, and an end of comparator input resistance (R8) is connected, the other end of this comparator input resistance (R8) and corresponding with it comparator (U1A)-end is connected, the output (OUT3) of current detecting chip (U5) is connected with an end of another comparator input resistance (R7), the other end of described another comparator input resistance (R7) and corresponding with it comparator (U1B)-end is connected.
4. pair cover LED point-source of light light signal control circuits that are used for according to claim 1, it is characterized in that: the secondary light source of described LED loop includes DC power supply, the constant current unit, the secondary light source (FLED) of light source switching relay (K1) and LED, described light source switching relay (K1) is provided with normally closed contact, the input (IN) of constant current tube (U4) is connected with the normally closed contact of described light source switching relay (K1), the other end of this group normally closed contact is connected with dc power anode, constant current tube (U4) output (OUT) is connected with an end of current-limiting resistance (R3), and the other end of this current-limiting resistance (R3) is connected with the ADJ end and secondary light source (FLED) light-emitting diode+end of constant current tube (U4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810033751 CN101316467B (en) | 2008-02-21 | 2008-02-21 | Duplexed LED point type light source colour lamp signal machine control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810033751 CN101316467B (en) | 2008-02-21 | 2008-02-21 | Duplexed LED point type light source colour lamp signal machine control circuit |
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| CN101316467A true CN101316467A (en) | 2008-12-03 |
| CN101316467B CN101316467B (en) | 2013-09-25 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011147111A1 (en) * | 2010-05-25 | 2011-12-01 | Luo Hongji | Electroluminescence circuit for lighting-emitting diodes |
| EP2445318A1 (en) * | 2010-10-15 | 2012-04-25 | Thales Rail Signalling Solutions GmbH | LED signal lamp with constant current operation |
| CN102869161A (en) * | 2012-09-15 | 2013-01-09 | 中南林业科技大学 | Intelligent light-emitting diode (LED) corridor lamp |
| CN101720147B (en) * | 2009-07-21 | 2013-04-03 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN105592607A (en) * | 2014-10-22 | 2016-05-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Constant-current control circuit structure applied to high-power LED device |
| CN107514550A (en) * | 2017-10-17 | 2017-12-26 | 孙宗福 | A kind of LED railway signals spotlight source device |
| CN108882460A (en) * | 2018-07-27 | 2018-11-23 | 厦门普为光电科技有限公司 | A kind of means of illumination and lighting system |
| CN111629491A (en) * | 2020-03-23 | 2020-09-04 | 北京全路通信信号研究设计院集团有限公司 | Safety type LED intelligent signal machine control system and method |
| CN116981130A (en) * | 2023-09-22 | 2023-10-31 | 杭州路信科技有限公司 | LED railway annunciator |
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| JP2005285527A (en) * | 2004-03-30 | 2005-10-13 | Koito Ind Ltd | Light-emitting diode type signal lamp unit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720147B (en) * | 2009-07-21 | 2013-04-03 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| WO2011147111A1 (en) * | 2010-05-25 | 2011-12-01 | Luo Hongji | Electroluminescence circuit for lighting-emitting diodes |
| EP2445318A1 (en) * | 2010-10-15 | 2012-04-25 | Thales Rail Signalling Solutions GmbH | LED signal lamp with constant current operation |
| CN102869161A (en) * | 2012-09-15 | 2013-01-09 | 中南林业科技大学 | Intelligent light-emitting diode (LED) corridor lamp |
| CN102869161B (en) * | 2012-09-15 | 2014-06-04 | 中南林业科技大学 | Intelligent light-emitting diode (LED) corridor lamp |
| CN105592607A (en) * | 2014-10-22 | 2016-05-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Constant-current control circuit structure applied to high-power LED device |
| CN107514550A (en) * | 2017-10-17 | 2017-12-26 | 孙宗福 | A kind of LED railway signals spotlight source device |
| CN108882460A (en) * | 2018-07-27 | 2018-11-23 | 厦门普为光电科技有限公司 | A kind of means of illumination and lighting system |
| CN111629491A (en) * | 2020-03-23 | 2020-09-04 | 北京全路通信信号研究设计院集团有限公司 | Safety type LED intelligent signal machine control system and method |
| CN111629491B (en) * | 2020-03-23 | 2022-10-21 | 北京全路通信信号研究设计院集团有限公司 | Safety type LED intelligent signal machine control system and method |
| CN116981130A (en) * | 2023-09-22 | 2023-10-31 | 杭州路信科技有限公司 | LED railway annunciator |
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