CN102509471B - Light-emitting diode (LED) traffic light failure monitoring system and method - Google Patents
Light-emitting diode (LED) traffic light failure monitoring system and method Download PDFInfo
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- CN102509471B CN102509471B CN2011103402775A CN201110340277A CN102509471B CN 102509471 B CN102509471 B CN 102509471B CN 2011103402775 A CN2011103402775 A CN 2011103402775A CN 201110340277 A CN201110340277 A CN 201110340277A CN 102509471 B CN102509471 B CN 102509471B
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Abstract
The invention provides a light-emitting diode (LED) traffic light failure monitoring system and an LED traffic light fault monitoring method. The system comprises an alternating current power supply and detection unit, an LED light set current detection module, an alternating current on/off control module and a free-wheeling element, wherein the alternating current power supply and detection unit is arranged in a traffic semaphore; the LED light set current detection module, the alternating current on/off control module and the free-wheeling element are arranged outside the traffic semaphore; the LED light set current detection module detects the working current of an LED signal light; when the working current of the LED signal light is lower than a normal working threshold value, the alternating current on/off control module switches off an alternating current loop; and if the alternating current power supply and detection unit cannot detect alternating current, the failure of the LED signal light is determined. By the LED traffic light failure monitoring system and the LED traffic light failure monitoring method, a reliable failure detection result can be obtained without changing a circuit structure of the traffic semaphore in the prior art.
Description
Technical field
The present invention relates to technical field of traffic control, be specifically related to a kind of LED traffic signal light fault monitoring system and method.
Background technology
Traffic lights are the important component parts in the traffic signals commander, are the basic languages of road traffic, are widely used in cross-road, bend, there is the Dangerous Area of potential safety hazard in bridges etc., conductor driver or pedestrian traffic, promotion has a good transport and communication network, and avoids traffic accident and the mishap generation.Controlling traffic lights carries out sign and change color according to certain rule and then realizes the control of Traffic Signals in Urban Roads and one of the important composition of Modern City Traffic system especially of the traffic signaling equipment of management.
Traditional traffic lights are generally incandescent lamps, and the incandescent lamp filament life-span is shorter, and fault often occurs, so traffic signaling equipment inside need be provided with fault monitoring circuit.Fig. 1 has provided in the prior art schematic diagram to incandescent modulating signal lamp fault detection circuit, as shown in the figure: the 220V AC power that the power supply of incandescent lamp signal lamp is provided by the AC-powered that is arranged at traffic signaling equipment inside and detecting unit forms through transformer and direct supply generative circuit, and the direct supply that the direct supply generative circuit generates provides operating voltage for the incandescent lamp traffic lights.The one-level winding of AC-powered and detecting unit and transformer has formed ac circuit, and the incandescent lamp traffic lights have formed DC loop as load and direct supply generative circuit.When the incandescent lamp traffic lights work, the incandescent lamp traffic lights are interior by a certain size electric current, now the secondary winding of transformer must be by a certain size alternating current, principle of work according to transformer, having accordingly alternating current in the one-level winding of transformer passes through, have alternating current in ac circuit, AC-powered and detecting unit can judge the normal operation of incandescent lamp traffic lights after this alternating current being detected.When incandescent lamp breaks down, open filament does not have electric current to flow through in DC loop, in corresponding ac circuit, does not have alternating current yet, and AC-powered and detecting unit can't detect this alternating current can judge that the incandescent lamp traffic lights break down.In sum, alternating current whether detected according to AC-powered and detecting unit and judge whether the incandescent lamp traffic lights break down.
Due to improving constantly of human society life level, cause the mankind also increasing to the demand of the energy, it is more and more obvious that the energy scarcity problem also shows, and, along with the scarcity of the natural resourcess such as countries in the world oil, coal, national most area has also been taked many kinds of measures in order to tackle short of electricity.In this case, due to the huge advantage of LED streetlamp energy-saving environmental protection, the traffic lights in a plurality of cities also are replaced by the LED signal lamp by original incandescent lamp traffic lights, to save the energy.The many differences on physical arrangement and operating characteristic due to LED signal lamp and incandescent lamp traffic lights, ought to change traffic signaling equipment along with the replacing of traffic lights, with the control of assurance traffic lights and the reliability of malfunction monitoring.If but traffic signaling equipment is all changed to gigantic project, will certainly increase cost, and the traffic signaling equipment replaced also can't continue application and causes waste, therefore for cost-saving, most of city all continues to use existing traffic signaling equipment, also continued to use in the prior art control and signal lamp failure detection method for signal lamp.
Be by a plurality of LED lamp series connection/LED lamp group formed in parallel in LED signal lamp inside, utilize traffic signaling equipment of the prior art can realize the accurate control to the LED signal lamp.But it is poor to utilize in prior art traffic signaling equipment to carry out the fault detect reliability to the LED signal lamp.Because for the pedestrian on road or driver, while having 20% signal lamp can be normal luminous in the LED signal lamp, impact due to daylight or street lamp light, people visually can not recognize that whether normal the LED lamp is luminous, and as common practise, when the LED lamp breaks down, just its internal resistance becomes very large, but be not to disconnect fully, therefore, when LED signal lamp inside has 80% LED lamp to break down, it is very large that its LED signal lamp is that resistance becomes, but can not guarantee that DC loop disconnects fully, even when the inner all LED lamps of LED signal lamp are all can not be normal luminous, DC loop is still in connected state.According to transformer working principle, AC-powered and detecting unit still can detect alternating current, now can not judge the LED signal lamp failure.Therefore break down when the LED signal lamp, pedestrian and driver can not differentiate the LED signal lamp when whether luminous, and existing fault monitoring method can not be made judgement accurately, to road traffic, brings potential safety hazard.
In order to address the above problem, existing patent documentation CN2783697Y discloses a kind of control circuit for the LED light source light signal, and it comprises source, city transformer, JZXC-H18 type filament relay, lighting unit and fault detection unit; Lighting unit is by the transformer of lighting a lamp, bridge rectifier electric current, filter capacitor, thresholding relay and light source switching relay form, after source, city transformer output 72V voltage end series connection JZXC-H18 type filament relay, with the transformer input end of lighting a lamp, be connected, the transformer output terminal of lighting a lamp is connected with bridge rectifier circuit, forms the LED light source direct supply; Filter capacitor is connected to direct supply; Normally closed, the normally opened contact of light source switching relay connects respectively the major and minor light source of LED, LED main light source side is equipped with photoresistance, and photoresistance, divider resistance form bleeder circuit, and connects the control utmost point composition fault detection unit of controllable silicon diode; Another group normally opened contact output failure alarm signal of light source switching relay; The thresholding relay is attempted by the circuit before LED light source; Though do not need to change signal chain circuit in technique scheme, the interlock circuit normal operation guaranteed, but also there is following problem in technique scheme:
1. in technique scheme, need to photoresistance be set in each LED signal lamp inside, and LED signal lamp inner space is limited, section arranges comparatively difficulty of photoresistance within it, especially for each LED lamp, one photoresistance is set, will certainly strengthen technologic complexity when processing LED signal lamp, also can bring the increase of cost, if each LED lamp all configures a photoresistance in addition, the treatment circuit of that follow-up electric signal for photoresistance output is very complicated, implements difficulty larger.
2. in technique scheme, can't directly apply traffic signaling equipment of the prior art and fault detection unit adaptation, also need existing traffic signaling equipment transformation is to the LED light source teleseme in above-mentioned technical scheme, although very little to the traffic signaling equipment structural modification in technique scheme, and cost decreases with respect to changing traffic signaling equipment, but each urban traffic signal machine quantity is larger, transforms all traffic signaling equipment gigantic projects, takes time and effort.
Summary of the invention
Technical matters to be solved by this invention be in prior art under the prerequisite of not changing traffic signaling equipment, adopt the failure detector circuit that detects the incandescent lamp fault to detect LED signal lamp failure reliability low, and adopt, the rational deployment that photoresistance can not meet the inner finite space of LED signal lamp is set, increase the complicacy of LED signal lamp processing, cause the increase of cost, and then provide a kind of circuit simple, the LED signal lamp failure testing circuit of LED lamp failure situation in LED lamp group can accurately be detected.
For solving the problems of the technologies described above, the invention provides a kind of LED traffic signal light fault monitoring system, comprise the AC-powered and the detecting unit that are arranged at traffic signaling equipment inside, also comprise: be arranged at traffic signaling equipment outer LED lamp group current detection module, alternating current break-make control module and continued flow component;
Described LED lamp group current detection module, it is for detection of the size of LED lamp group electric current, when the value of LED lamp group electric current is less than LED signal lamp working current threshold value, controls described alternating current break-make control module to described alternating current break-make control module transmitted signal and disconnect ac circuit;
Described alternating current break-make control module, it is connected between AC power and one-level winding; When described alternating current break-make control module is communicated with ac circuit, described AC power is communicated with described one-level winding, when described alternating current break-make control module disconnects ac circuit, described AC power and described one-level winding disconnect, and the continued flow component charged is communicated with described alternating current break-make control module;
Described continued flow component, it has charging/discharging function, by described alternating current break-make control module, with the direct supply generative circuit, is connected, and when alternating current break-make control module is communicated with ac circuit, the direct supply generative circuit is the continued flow component charging.
Described LED lamp group current detection module comprises:
Current sampling resistor: be connected between the output terminal and earth signal of described LED lamp group, the pressure drop U1 at described current sampling resistor two ends is directly proportional to described LED lamp group electric current, when described LED lamp group electric current equals LED signal lamp working current threshold value, the pressure drop at described current sampling resistor two ends is U0;
Control circuit: detect in real time described current sampling resistor both end voltage value U1 the relation of U1 and U0 relatively, when U1<U0, described control circuit is exported " 1 " control signal, and this represent the LED signal lamp failure.
Described control circuit adopts MPU (the Micro Processor Unit) controller with analog to digital converter.
Described alternating current break-make control module comprises electric-controlled switch, relay and pull-up resistor;
Described electric-controlled switch, be connected between described relay and described control circuit output terminal, during described control circuit output " 1 " control signal, and the closed conducting of electric-controlled switch, described relay disconnects ac circuit;
Described relay, can switch simultaneously and exchange 220v and direct current 12v, output terminal of its normally closed contact III and AC power is connected, the common II of described relay is connected with an input end of described one-level winding, described direct supply generative circuit is connected with continued flow component by normally closed contact VI, described common VII and normally closed contact VI adhesive in the time of the common II of described relay and normally closed contact II I adhesive, described ac circuit in connected state simultaneously described continued flow component in charged state;
The normally opened contact V of described relay is connected with described electric-controlled switch by described pull-up resistor, when the common VII of described relay and normally opened contact V adhesive, ac circuit disconnects, and the described continued flow component charged provides forward voltage by described pull-up resistor for described electric-controlled switch.
Described electric-controlled switch adopts Darlington triode, and the annexation of described Darlington transistor in system is: base stage is connected with described control circuit output terminal, and collector is connected with the normally closed contact I of relay, and emitter-base bandgap grading is connected with earth signal.
Described continued flow component adopts the afterflow electric capacity of 4700uF, a termination earth signal of described afterflow electric capacity, and the other end is connected with normally closed contact VIII with the common VII of described relay.
Described LED signal lamp working current threshold value is chosen in described LED lamp group 1/2nd of LED lamp group electric current when all LED lamps all work.
The present invention also provides a kind of LED traffic signal light fault detection method, comprises the steps:
1. alternating current break-make control module is communicated with ac circuit, and continued flow component is charged;
2. continued flow component has charged, and LED lamp group current detection module starts to detect in real time LED lamp group electric current, and AC-powered and detecting unit detect the alternating current in ac circuit;
3. when LED lamp group electric current is more than or equal to LED signal lamp working current threshold value, described alternating current break-make control module keeps connected state, and the alternating current that described AC-powered and detecting unit detect is non-vanishing, the normal operation of judgement LED signal lamp;
When the value of LED lamp group electric current is less than LED signal lamp working current threshold value, described LED lamp group current detection module is controlled described alternating current break-make control module and is disconnected, the continued flow component charged provides operating voltage for alternating current break-make control module, the alternating current that described AC-powered and detecting unit detect is zero, judgement LED signal lamp failure.
Described step 2. in, when described alternating current break-make control module is communicated with, utilizes current sampling resistor that the variation of LED lamp group electric current is scaled to the variation of current sampling resistor two ends pressure drop, and utilize control circuit to detect the pressure drop U1 at described current sampling resistor two ends; Store the pressure drop U0 at the described current sampling resistor two ends when described LED lamp group electric current equals LED signal lamp working current threshold value in described control circuit;
Described step 3. in, described control circuit compares the relation of U1 and U0, when U1<U0, described control circuit output " 1 " controls signal to described alternating current break-make control module, described alternating current break-make control module is controlled ac circuit and is disconnected, AC-powered and detecting unit can't detect alternating current, judgement LED signal lamp failure.
Described step 3. in, adopt to there is the MPU controller of analog to digital converter as control circuit.
Described step 3. in, adopt in described alternating current break-make control module and can switch whether the Control ac circuit that exchanges 220v and direct current 12v is communicated with and described relay is in series with electric-controlled switch simultaneously, during the electric-controlled switch conducting, relay disconnects ac circuit, when electric-controlled switch turn-offs, relay is communicated with ac circuit;
Described control circuit compares the relation of U1 and U0, when U1<U0, described control circuit output " 1 " controls signal to described electric-controlled switch, the closed conducting of described electric-controlled switch, described relay disconnects ac circuit, the afterflow electric capacity charged provides the forward voltage of operating voltage and electric-controlled switch as power supply for relay, and described AC-powered and detecting unit can't detect alternating current, judgement LED signal lamp failure.
Described step 1. in, select the afterflow electric capacity of 4700uF as continued flow component.
Described step 3. in, described LED signal lamp working current threshold value is chosen in described LED lamp group 1/2nd of LED lamp group electric current when all LED lamps all work.
Compared with prior art there is following advantage in technique scheme of the present invention:
1. LED fault detection system and the detection method in the present invention, utilize LED lamp group current detection module to detect the size of current of LED signal lamp output, when LED signal lamp lamp group loop current is less than LED running current threshold value, utilizing alternating current break-make control module to control ac circuit disconnects, after ac circuit disconnects, AC-powered and detecting unit can't detect AC signal, judgement LED signal lamp failure.Thus can be under the prerequisite of not changing existing traffic signaling equipment, adopt to control that ac circuit in prior art is communicated with or the mode that disconnects detects the LED signal lamp and whether breaks down, while effectively having solved the LED signal lamp failure, AC-powered and detecting unit can also detect the problem of alternating current.
2. the LED lamp group current detection module in the present invention comprises current sampling resistor, purpose is the variation of LED lamp group electric current to be transformed to the variation of current sampling resistor both end voltage, can effectively avoid due to the inaccurate situation of the small testing result caused of LED lamp group current change quantity; Control circuit in LED lamp group current detection module can be selected the MPU controller of analog to digital converter simultaneously, with low cost, powerful, and its realization able to programme is easy to upgrading and parameter is controlled.
3. in the present invention, alternating current break-make control module adopts relay as critical piece, because adopting switching simultaneously, relay exchanges the model of 220v and direct current 12v, switch current is 2A, because, during the full lamp of disk, LED lamp group high-high brightness more needs 12v, 1.2A, be scaled and exchange the not enough 100mmA of 220v, therefore selected relay switch electric current is much larger than the required electric current of LED signal lamp.
4. in the present invention, electric-controlled switch is selected Darlington triode, utilizes Darlington triode to drive relay can effectively reduce the loss of relay power for voltage.
5. in the present invention, continued flow component adopts the afterflow electric capacity of 4700uF, can maintain system cut-off 4-5s.If select the traffic signaling equipment of MPU controller, the outage required time being detected should be much smaller than 1s, and maintain system cut-off 4-5s, be to prepare in order to give the difference that the different model traffic signaling equipment may exist, therefore for dissimilar and traffic signaling equipment model, adopt fault detection system of the present invention and detection method all can accurately detect the fault of LED signal lamp.
The accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein:
Fig. 1 is prior art incandescent lamp signal lamp failure testing circuit schematic diagram;
Fig. 2 is LED signal lamp failure detection system block diagram of the present invention;
LED signal lamp failure testing circuit schematic diagram when Fig. 3 is the normal operation of LED signal lamp;
LED signal lamp failure testing circuit schematic diagram when Fig. 4 is the LED signal lamp failure;
Fig. 5 is LED lamp group current detection module circuit theory diagrams of the present invention;
Embodiment
The present embodiment provides a kind of LED signal lamp failure monitoring system, as shown in Figure 2, comprises the AC-powered and the detecting unit that are arranged at traffic signaling equipment inside, also comprises: LED lamp group current detection module, alternating current break-make control module and continued flow component;
Described LED lamp group current detection module, it is for detection of the size of LED lamp group electric current, when the value of LED lamp group electric current is less than LED signal lamp working current threshold value, controls described alternating current break-make control module to described alternating current break-make control module transmitted signal and disconnect ac circuit; As shown in Figure 3, described LED lamp group current detection module comprises: current sampling resistor RS: be connected between the output terminal and earth signal of described LED lamp group the pressure drop U at described current sampling resistor RS two ends
1to described LED lamp group electric current, be directly proportional, when described LED lamp group electric current equals LED signal lamp working current threshold value, the pressure drop at described current sampling resistor RS two ends is U
0; Control circuit: detect in real time described current sampling resistor RS both end voltage value U
1and comparison U
1with U
0relation, work as U
1<U
0the time, described control circuit output " 1 " control signal, i.e. LED signal lamp failure; Can select according to actual conditions the size of RS in actual application, but should avoid the RS resistance to cross greatly system brings unnecessary power attenuation.As preferred embodiment, described control circuit adopts MPU (the Micro Processor Unit) controller with analog to digital converter, more preferably can select 8 12F629 of PIC series or similarly MPU controller or comparer with it, be characterized in not needing the peripheral circuit supports such as crystal oscillator, reset circuit.
Described alternating current break-make control module, its be connected in AC power and one-level winding between; When described alternating current break-make control module is communicated with ac circuit, described AC power is communicated with described one-level winding, when described alternating current break-make control module disconnects ac circuit, described AC power and described one-level winding disconnect, and the continued flow component charged is communicated with described alternating current break-make control module;
In the present embodiment, described alternating current break-make control module comprises electric-controlled switch, relay and pull-up resistor;
Described electric-controlled switch, be connected between described relay and described control circuit output terminal, during described control circuit output " 1 " control signal, and the closed conducting of electric-controlled switch, described relay disconnects ac circuit; As preferred embodiment, select Darlington triode as electric-controlled switch, can effectively reduce the loss of relay power.
Described relay, can switch simultaneously and exchange 220v and direct current 12v, output terminal of its normally closed contact III and AC power is connected, the common II of described relay is connected with an input end of described one-level winding, and described direct supply generative circuit is connected with continued flow component by normally closed contact VI;
As shown in Figure 4, described common VII and normally closed contact VI adhesive in the time of the common II of described relay and normally closed contact III adhesive, described ac circuit in connected state simultaneously described continued flow component in charged state;
As shown in Figure 5, the normally opened contact V of described relay is connected with described electric-controlled switch by described pull-up resistor, when the common VII of described relay and normally opened contact V adhesive, the described continued flow component charged provides forward voltage by described pull-up resistor for described electric-controlled switch, and ac circuit disconnects.In the present embodiment, utilizing contact I to mean contact 1 to the contact 8 in accompanying drawing to contact VIII, is mainly for fear of adopting arabic numeral and Reference numeral to obscure.
Described electric-controlled switch adopts Darlington triode, and the annexation of described Darlington transistor in system is: base stage is connected with described control circuit output terminal, and collector is connected with the normally closed contact I of relay, and emitter-base bandgap grading is connected with earth signal.Exchange the model of 220v and direct current 12v because relay adopts switching simultaneously, switch current is 2A, because during the full lamp of disk, LED lamp group high-high brightness more needs 12v, 1.2A, be scaled and exchange the not enough 100mmA of 220v, therefore selected relay switch electric current is much larger than the required electric current of LED signal lamp.
Described continued flow component, it has charging/discharging function, by described alternating current break-make control module, with the direct supply generative circuit, is connected, and when alternating current break-make control module is communicated with ac circuit, the direct supply generative circuit is the continued flow component charging.In the present embodiment, continued flow component adopts the afterflow electric capacity of 4700uF, can maintain system cut-off 4-5s, give the difference that the different model traffic signaling equipment may exist and prepare, therefore for dissimilar and traffic signaling equipment model, adopt fault detection system of the present invention and detection method all can accurately detect the fault of LED signal lamp.
The present embodiment also provides a kind of LED signal lamp failure detection method, comprises the steps:
1. alternating current break-make control module is communicated with ac circuit, and continued flow component is charged;
2. continued flow component has charged, and LED lamp group current detection module starts to detect in real time LED lamp group electric current, and AC-powered and detecting unit detect the alternating current in ac circuit;
3. when LED lamp group electric current is more than or equal to LED signal lamp working current threshold value, described alternating current break-make control module keeps connected state, and the alternating current that described AC-powered and detecting unit detect is non-vanishing, the normal operation of judgement LED signal lamp;
When the value of LED lamp group electric current is less than LED signal lamp working current threshold value, described LED lamp group current detection module is controlled described alternating current break-make control module and is disconnected, the continued flow component charged provides operating voltage for alternating current break-make control module, the alternating current that described AC-powered and detecting unit detect is zero, judgement LED signal lamp failure.
The present embodiment is on the basis of embodiment 1, and described LED signal lamp working current threshold value is chosen in described LED lamp group 1/2nd of LED signal lamp electric current when all LED lamps all work.While in LED lamp group, having half LED lamp to break down, the fault detection system in the present embodiment just can be judged the LED signal lamp failure, needs to change.Although now pedestrian and driver can judge that whether luminous the LED signal lamp is, now system alert LED signal lamp failure replacing LED signal lamp is in order to improve security performance, when concrete application, also can select according to actual conditions the size of LED signal lamp working current threshold value.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.
Claims (10)
1. a LED traffic signal light fault monitoring system, comprise the AC-powered and the detecting unit that are arranged at traffic signaling equipment inside, it is characterized in that, also comprise: be arranged at traffic signaling equipment outer LED lamp group current detection module, alternating current break-make control module and continued flow component;
Described LED lamp group current detection module, it is for detection of the size of LED lamp group electric current, when the value of LED lamp group electric current is less than LED signal lamp working current threshold value, controls described alternating current break-make control module to described alternating current break-make control module transmitted signal and disconnect ac circuit;
Described LED lamp group current detection module comprises:
Current sampling resistor: be connected between the output terminal and earth signal of described LED lamp group the pressure drop U at described current sampling resistor two ends
1to described LED lamp group electric current, be directly proportional, when described LED lamp group electric current equals LED signal lamp working current threshold value, the pressure drop at described current sampling resistor two ends is U
0;
Control circuit: adopt the MPU controller with analog to digital converter, detect in real time described current sampling resistor both end voltage value U
1and comparison U
1with U
0relation, work as U
1<U
0the time, described control circuit output " 1 " control signal, this represent the LED signal lamp failure;
Described alternating current break-make control module, it is connected between AC power and one-level winding; When described alternating current break-make control module is communicated with ac circuit, described AC power is communicated with described one-level winding, when described alternating current break-make control module disconnects ac circuit, described AC power and described one-level winding disconnect, and the continued flow component charged is communicated with described alternating current break-make control module;
Described alternating current break-make control module comprises electric-controlled switch, relay and pull-up resistor;
Described electric-controlled switch, be connected between described relay and described control circuit output terminal, during described control circuit output " 1 " control signal, and the closed conducting of electric-controlled switch, described relay disconnects ac circuit;
Described relay, can switch simultaneously and exchange 220v and direct current 12v, output terminal of its normally closed contact III and AC power is connected, the common II of described relay is connected with an input end of described one-level winding, described direct supply generative circuit is connected with continued flow component by normally closed contact VI, described common VII and normally closed contact VI adhesive in the time of the common II of described relay and normally closed contact III adhesive, described ac circuit in connected state simultaneously described continued flow component in charged state;
The normally opened contact V of described relay is connected with described electric-controlled switch by described pull-up resistor, when the common VII of described relay and normally opened contact V adhesive, ac circuit disconnects, and the described continued flow component charged provides forward voltage by described pull-up resistor for described electric-controlled switch;
Described continued flow component, it has charging/discharging function, by described alternating current break-make control module, with the direct supply generative circuit, is connected, and when alternating current break-make control module is communicated with ac circuit, the direct supply generative circuit is the continued flow component charging.
2. LED traffic signal light fault monitoring system according to claim 1 is characterized in that:
Described electric-controlled switch adopts Darlington triode, and the annexation of described Darlington transistor in system is: base stage is connected with described control circuit output terminal, and collector is connected with the normally closed contact I of relay, and emitter-base bandgap grading is connected with earth signal.
3. LED traffic signal light fault monitoring system according to claim 1 and 2 is characterized in that:
Described continued flow component adopts the afterflow electric capacity of 4700uF, a termination earth signal of described afterflow electric capacity, and the other end is connected with normally closed contact VIII with the common VII of described relay.
4. LED traffic signal light fault monitoring system according to claim 3 is characterized in that:
Described LED signal lamp working current threshold value is chosen in described LED lamp group 1/2nd of LED lamp group electric current when all LED lamps all work.
5. a LED traffic signal light fault detection method, is characterized in that, comprises the steps:
1. alternating current break-make control module is communicated with ac circuit, and continued flow component is charged;
2. continued flow component has charged, and LED lamp group current detection module starts to detect in real time LED lamp group electric current, and AC-powered and detecting unit detect the alternating current in ac circuit;
3. when LED lamp group electric current is more than or equal to LED signal lamp working current threshold value, described alternating current break-make control module keeps connected state, and the alternating current that described AC-powered and detecting unit detect is non-vanishing, the normal operation of judgement LED signal lamp;
When the value of LED lamp group electric current is less than LED signal lamp working current threshold value, described LED lamp group current detection module is controlled described alternating current break-make control module and is disconnected, the continued flow component charged provides operating voltage for alternating current break-make control module, the alternating current that described AC-powered and detecting unit detect is zero, judgement LED signal lamp failure.
6. LED traffic signal light fault detection method according to claim 5 is characterized in that:
Described step 2. in, when described alternating current break-make control module is communicated with, utilizes current sampling resistor that the variation of LED lamp group electric current is scaled to the variation of current sampling resistor two ends pressure drop, and utilize control circuit to detect the pressure drop U at described current sampling resistor two ends
1; Store the pressure drop U at the described current sampling resistor two ends when described LED lamp group electric current equals LED signal lamp working current threshold value in described control circuit
0;
Described step 3. in, described control circuit is U relatively
1with U
0relation, work as U
1<U
0the time, described control circuit output " 1 " controls signal to described alternating current break-make control module, and described alternating current break-make control module is controlled ac circuit and is disconnected, and AC-powered and detecting unit can't detect alternating current, judgement LED signal lamp failure.
7. LED traffic signal light fault detection method according to claim 6 is characterized in that:
Described step 3. in, adopt to there is the MPU controller of analog to digital converter as control circuit.
8. according to the described LED traffic signal light fault of claim 6 or 7 detection method, it is characterized in that:
Described step 3. in, adopt in described alternating current break-make control module and can switch whether the Control ac circuit that exchanges 220v and direct current 12v is communicated with and described relay is in series with electric-controlled switch simultaneously, during the electric-controlled switch conducting, relay disconnects ac circuit, when electric-controlled switch turn-offs, relay is communicated with ac circuit;
Described control circuit is U relatively
1with U
0relation, work as U
1<U
0the time, described control circuit output " 1 " controls signal to described electric-controlled switch, the closed conducting of described electric-controlled switch, described relay disconnects ac circuit, the afterflow electric capacity charged provides the forward voltage of operating voltage and electric-controlled switch as power supply for relay, described AC-powered and detecting unit can't detect alternating current, judgement LED signal lamp failure.
9. LED traffic signal light fault detection method according to claim 8 is characterized in that:
Described step 1. in, select the afterflow electric capacity of 4700uF as continued flow component.
10. LED traffic signal light fault detection method according to claim 9 is characterized in that:
Described step 3. in, described LED signal lamp working current threshold value is chosen in described LED lamp group 1/2nd of LED lamp group electric current when all LED lamps all work.
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| CN103971532B (en) * | 2013-02-04 | 2016-09-21 | 北京桓润世嘉科技有限公司 | Signal detection controls equipment and traffic signal fault automatic tour inspection system |
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| CN110232830A (en) * | 2019-07-15 | 2019-09-13 | 湖南汽车工程职业学院 | A kind of traffic lights firewire open circuit monitoring device, monitoring circuit and monitoring method |
| CN110536513A (en) * | 2019-09-18 | 2019-12-03 | 深圳市帅航户外照明科技股份有限公司 | A kind of universal intelligent fosterage of plants lighting apparatus power conditioning module |
| CN111951579A (en) * | 2020-10-19 | 2020-11-17 | 江苏广宇科技产业发展有限公司 | Traffic operation and maintenance monitoring system and equipment based on edge calculation |
| CN115311884A (en) * | 2022-04-29 | 2022-11-08 | 彭肇华 | Novel traffic signal lamp fault detection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19848405C2 (en) * | 1997-04-21 | 2002-10-10 | Stuehrenberg Gmbh Elektrobau S | Traffic signal control method |
| CN200985032Y (en) * | 2006-12-25 | 2007-12-05 | 王楷迪 | Control system for LED railway signal machine |
| TWM370796U (en) * | 2009-07-09 | 2009-12-11 | Univ Cheng Shiu | Traffic sign problem reporting system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009193459A (en) * | 2008-02-15 | 2009-08-27 | Toshiba Corp | Traffic signal controller |
-
2011
- 2011-11-01 CN CN2011103402775A patent/CN102509471B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19848405C2 (en) * | 1997-04-21 | 2002-10-10 | Stuehrenberg Gmbh Elektrobau S | Traffic signal control method |
| CN200985032Y (en) * | 2006-12-25 | 2007-12-05 | 王楷迪 | Control system for LED railway signal machine |
| TWM370796U (en) * | 2009-07-09 | 2009-12-11 | Univ Cheng Shiu | Traffic sign problem reporting system |
Non-Patent Citations (5)
| Title |
|---|
| JP特开2009-193459A 2009.08.27 |
| 一种基于PLC的LED交通信号灯自动检测系统;左熹 等;《灯与照明》;20071231;第31卷(第4期);7-10 * |
| 基于电力线载波技术的LED交通信号灯故障检测模块的设计;胡津津;《宿州学院学报》;20110228;第26卷(第2期);58-60 * |
| 左熹 等.一种基于PLC的LED交通信号灯自动检测系统.《灯与照明》.2007,第31卷(第4期),7-10. |
| 胡津津.基于电力线载波技术的LED交通信号灯故障检测模块的设计.《宿州学院学报》.2011,第26卷(第2期),58-60. |
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