CN108761355B - Fault lamp detection circuit and system - Google Patents
Fault lamp detection circuit and system Download PDFInfo
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- CN108761355B CN108761355B CN201810332252.2A CN201810332252A CN108761355B CN 108761355 B CN108761355 B CN 108761355B CN 201810332252 A CN201810332252 A CN 201810332252A CN 108761355 B CN108761355 B CN 108761355B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/44—Testing lamps
Abstract
The embodiment of the invention provides a fault lamp detection circuit and system, and relates to the technical field of lamps. The fault lamp detection circuit comprises a processor, a constant current source, a reference power supply, an operational amplifier module, a lamp module, a switch module, a resistance module and a relay module, wherein the switch module is used for being switched on when the lamp module is in a disconnected state, the operational amplifier module is used for outputting a state signal according to the on-off state of the lamp module and the on-off state of the switch module, and the processor is used for controlling the connection state of the relay according to the state signal so that an undamaged light source in the lamp module can normally run. The fault lamp detection circuit and the fault lamp detection system provided by the invention have the advantages that manual operation is not needed, the convenience is higher, and the inconvenience is not brought to the normal operation of an airport.
Description
Technical Field
The invention relates to the technical field of lamps, in particular to a fault lamp detection circuit and system.
Background
At present, with the improvement of living standard of people, more and more people have more choices when going out, and airplanes are popular to people due to the characteristic of high speed, so the aviation industry is greatly developed, and meanwhile, the illumination of airports also focuses attention of people.
Because the airport lamp loop uses the airport constant current source as the power supply, all airport lamps are used in series, and each lamp is provided with an isolation transformer. At present, most of airport lamps do not have a fault lamp detection circuit, after the airport lamps are damaged, only the isolation transformer can be left to be opened, a large inductive reactance can be generated, and if the damaged airport lamps reach a certain value, the airport constant current source cannot work due to the large inductive reactance of the isolation transformer. That is, when one part of the lamps in the airport is damaged, the other part of the lamps which are not in fault cannot be used, so that inconvenience is brought to normal operation of the airport.
In view of the above, how to solve the above problems is the focus of attention of those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a fault lamp detection circuit, so as to solve the problem that in the prior art, when some lamps in a plant have faults, other lamps that have not faults cannot be used.
Another objective of the present invention is to provide a fault lamp detection system to solve the problem that in the prior art, when some lamps in a airport have faults, other lamps that have not faults cannot be used.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in one aspect, an embodiment of the present invention provides a fault lamp detection circuit, where the fault lamp detection circuit includes a processor, a constant current source, a reference power source, an operational amplifier module, a lamp module, a switch module, a resistance module, and a relay module, the processor is electrically connected to the operational amplifier module and the relay module, the constant current source is electrically connected to the switch module, the relay module, and the lamp module, the relay is electrically connected to the lamp module, the switch module is electrically connected to the operational amplifier module, the reference power source is electrically connected to the operational amplifier module, the resistance module is electrically connected to the lamp module, the switch module is configured to be turned on when the lamp module is in an off state, the operational amplifier module is configured to output a state signal according to the on-off state of the lamp module and the on-off state of the switch module, the processor is used for controlling the connection state of the relay according to the state signal so as to enable the undamaged lamps in the lamp module to normally operate.
Further, the operational amplifier module comprises a first operational amplifier, a second operational amplifier, a third operational amplifier and a fourth operational amplifier, the lamp module comprises a first lamp and a second lamp, the switch module comprises a first thyristor, a second thyristor, a first trigger tube and a second trigger tube, the relay module comprises a first relay and a second relay, the resistance module comprises a first resistor, a second resistor, a third resistor and a fourth resistor, the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier are all electrically connected with the reverse input end of the reference power supply, and the output ends of the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier are all electrically connected with the processor, and the processor is respectively electrically connected with the first relay and the second relay, the constant current source, the first lamp and the first resistor are sequentially connected in series and then grounded, the constant current source, the second lamp and the second resistor are also sequentially connected in series and then grounded, the first relay is electrically connected with the first lamp, the second relay is electrically connected with the second lamp and then electrically connected with the first relay, one end of the first resistor connected with the first lamp is electrically connected with the in-phase input end of the first operational amplifier, one end of the second resistor connected with the second lamp is electrically connected with the in-phase input end of the second operational amplifier, the first trigger tube is connected with the first thyristor in parallel, and the first trigger tube is respectively connected with the in-phase input end of the third operational amplifier, One end of the third resistor is electrically connected, the other end of the third resistor is grounded, one end of the controlled silicon is also grounded, the second trigger tube is connected with the second controlled silicon in parallel, the second trigger tube is respectively electrically connected with the homodromous input end of the fourth operational amplifier and one end of the fourth resistor, the other end of the fourth resistor is grounded, and one end of the controlled silicon is also grounded.
Furthermore, the first relay and the second relay both comprise single-pole double-throw relays, each single-pole double-throw relay comprises a normally open end, a normally closed end and a movable end, the normally open end and the normally closed end of the first relay are respectively electrically connected with two ends of the first lamp, the normally open end and the normally closed end of the second relay are respectively electrically connected with two ends of the second lamp, and the movable end of the first relay is electrically connected with the movable end of the second relay.
Further, the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier are integrated on a chip.
Furthermore, the first silicon controlled rectifier and the second silicon controlled rectifier are both bidirectional silicon controlled rectifiers.
Further, the first light fixture and the second light fixture each include a light source or a sensor.
Further, the light source comprises a halogen light source and an LED light source.
Further, the current range of the constant current source is 2.8-6.6A.
Further, the processor includes a digital filter.
On the other hand, the embodiment of the invention also provides a fault lamp detection system, which comprises a plurality of fault lamp detection circuits, wherein lamp modules of the plurality of fault lamp detection circuits are connected in series.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a fault lamp detection circuit and a system, wherein the fault lamp detection circuit comprises a processor, a constant current source, a reference power supply, an operational amplifier module, a lamp module, a switch module, a resistance module and a relay module, and when the lamp module breaks down, a state signal output by the operational amplifier module and the conduction state of the switch module can be changed, so that the processor can judge whether the lamp module breaks down or not by judging the state signal output by the operational amplifier module and the conduction state of the switch module, and then control the connection state of the relay, so that an undamaged light source in the lamp module can normally run. On the one hand, the processor can automatically realize the detection of the fault lamp by judging whether the lamp module breaks down or not, so that manual operation is not needed, and the lamp module is more convenient. On the other hand, after the fault of the lamp module is detected, the processor can also control the connection state of the relay, so that the undamaged light source in the lamp module can normally operate, one lamp is damaged in actual use, but other lamps can operate for a longer time, and the normal operation of an airport is not inconvenient.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a block schematic diagram of a fault lamp detection circuit provided by an embodiment of the present invention.
Fig. 2 shows a circuit diagram of a fault lamp detection circuit provided by one embodiment of the present invention.
Fig. 3 shows a schematic diagram of a first relay and a second relay provided by an embodiment of the invention.
Fig. 4 shows a block schematic diagram of a fault lamp detection system provided by an embodiment of the present invention.
Icon: 100-fault lamp detection circuit; 110-a constant current source; 120-a processor; 130-an operational amplifier module; 131-a first operational amplifier; 132-a second operational amplifier; 133-a third operational amplifier; 134-a fourth operational amplifier; 140-a relay module; 141-a first relay; 1411-normally open end; 1412-normally closed end; 1413-a free end; 142-a second relay; 150-a reference power supply; 160-a switch module; 161-a first thyristor; 162-a second thyristor; 163-a first trigger tube; 164-a second trigger tube; 170-a luminaire module; 171-a first luminaire; 172-a second luminaire; 180-resistance module; 181-first resistance; 182-a second resistor; 183-third resistance; 184-fourth resistor; 200-faulty lamp detection system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
First embodiment
Referring to fig. 1, a fault lamp detection circuit 100 according to an embodiment of the present invention includes a processor 120, a constant current source 110, a reference power source 150, an operational amplifier module 130, a lamp module 170, a switch module 160, a resistance module 180, and a relay module 140, where the processor 120 is electrically connected to the operational amplifier module 130 and the relay module 140, the constant current source 110 is electrically connected to the switch module 160, the relay module 140, and the lamp module 170, the relay is electrically connected to the lamp module 170, the switch module 160 is electrically connected to the operational amplifier module 130, the reference power source 150 is electrically connected to the operational amplifier module 130, the resistance module 180 is electrically connected to the lamp module 170, the switch module 160 is configured to be turned on when the lamp module 170 is in an off state, the operational amplifier module 130 is configured to output a status signal according to an on-off state of the lamp module 170 and an on-state of the switch module 160, the processor 120 is configured to control the connection state of the relay according to the state signal, so that the undamaged lamps in the lamp module 170 operate normally.
Specifically, referring to fig. 2 and fig. 3, in the present embodiment, the operational amplifier module 130 includes a first operational amplifier 131, a second operational amplifier 132, a third operational amplifier 133 and a fourth operational amplifier 134, the lamp module 170 includes a first lamp 171 and a second lamp 172, the switch module 160 includes a first thyristor 161, a second thyristor 162, a first trigger tube 163 and a second trigger tube 164, the relay module 140 includes a first relay 141 and a second relay 142, the resistor module 180 includes a first resistor 181, a second resistor 182, a third resistor 183 and a fourth resistor 184, the first operational amplifier 131, the second operational amplifier 132, the third operational amplifier 133 and the fourth operational amplifier 134 are electrically connected to the inverting input terminal of the reference power source 150, the output terminals of the first operational amplifier 131, the second operational amplifier 132, the third operational amplifier 133 and the fourth operational amplifier 134 are electrically connected to the processor 120, the processor 120 is electrically connected to the first relay 141 and the second relay 142, the constant current source 110, the first lamp 171 and the first resistor 181 are sequentially connected in series and then grounded, the constant current source 110, the second lamp 172 and the second resistor 182 are also sequentially connected in series and then grounded, the first relay 141 is electrically connected to the first lamp 171, the second relay 142 is electrically connected to the second lamp 172 and the first relay 141 is electrically connected to the second relay 142, one end of the first resistor 181 connected to the first lamp 171 is electrically connected to the non-inverting input terminal of the first operational amplifier 131, one end of the second resistor 182 connected to the second lamp 172 is electrically connected to the non-inverting input terminal of the second operational amplifier 132, the first trigger tube is connected to the first thyristor 161 in parallel, the first trigger tube is electrically connected to the non-inverting input terminal of the third operational amplifier 133 and one end of the third resistor 183, and the other end of the third resistor 183 is grounded, one end of the thyristor is also grounded, the second trigger tube is connected in parallel with the second thyristor 162, and the second trigger tube is respectively electrically connected to the equidirectional input end of the fourth operational amplifier 134 and one end of the fourth resistor 184, the other end of the fourth resistor 184 is grounded, and one end of the thyristor is also grounded.
In addition, in this embodiment, the first relay 141 and the second relay 142 each include a single-pole double-throw relay, the single-pole double-throw relay includes a normally open end 1411, a normally closed end 1412 and a movable end 1413, the normally open end 1411 and the normally closed end 1412 of the first relay 141 are electrically connected to two ends of the first lamp 171 respectively, the normally open end 1411 and the normally closed end 1412 of the second relay 142 are electrically connected to two ends of the second lamp 172 respectively, and the movable end 1413 of the first relay 141 is electrically connected to the movable end 1413 of the second relay 142. When a switching instruction sent by the processor 120 is not received, the active end 1413 of the single-pole double-throw relay is always in contact with the normally-closed end 1412, so that the single-pole double-throw relay is in a normally-closed state, and when the switching instruction sent by the processor 120 is received, the active end 1413 is in contact with the normally-open end 1411, so that the normally-open end 1411 is in a conducting state.
In the present embodiment, the operation principle of the faulty lamp detection circuit 100 is as follows:
when the first lamp 171 and the second lamp 172 at the airport are to be turned on, the first relay 141 is in a normally open state (that is, the active end 1413 is in contact with the normally open end 1411), and the second relay 142 is also in a normally open state, it should be noted that, in the embodiment, the first relay 141 and the second relay 142 are of the same model, and no matter whether the first lamp 171 and the second lamp 172 at the airport are normal or not, when the airport is initially powered on, the first relay 141 and the second relay 142 are both in a normally closed state, so as to form a short circuit loop, and it is ensured that an open circuit is not generated due to a fault of the first lamp 171 and the second lamp 172 at the airport during the power on.
The reference power source 150 is electrically connected to inverting input terminals of the first operational amplifier 131, the second operational amplifier 132, the third operational amplifier 133, and the fourth operational amplifier 134, respectively, to generate a reference voltage of Vref. At power-up, since the first relay 141 and the second relay 142 form a short circuit, the switch module 160 is not turned on, that is, the forward input terminals of the third operational amplifier 133 and the fourth operational amplifier 134 are at low voltage, so that the third operational amplifier 133 and the fourth operational amplifier 134 output high level. It should be noted that, the operational principle of the operational amplifier is that when the voltage of the positive input terminal is higher than the voltage of the negative input terminal, the output terminal of the operational amplifier outputs a high level; when the voltage of the positive input terminal is lower than that of the negative input terminal, the output terminal of the operational amplifier outputs a low level.
Since the positive input terminal of the first operational amplifier 131 is connected to the ground through the first lamp 171 and the normally closed terminal 1412 of the first relay 141, if the first lamp 171 is abnormal, the first operational amplifier 131 outputs a low level, and when the first lamp 171 fails and is open-circuited, the non-inverting input terminal of the first operational amplifier 131 has a high voltage, that is, the first operational amplifier 131 outputs a high level, so that the processor 120 can determine whether the first lamp 171 is normal.
Similarly, since the positive input terminal of the second operational amplifier 132 is connected to the ground through the second lamp 172 and the normally-closed terminal 1412 of the second relay 142, if the second lamp 172 is abnormal, the second operational amplifier 132 outputs a low level, and when the second lamp 172 fails and is open-circuited, the non-inverting input terminal of the second operational amplifier 132 has a high voltage, that is, the second operational amplifier 132 outputs a high level, so that it can determine whether the second lamp 172 is normal through the processor 120.
The processor 120 is connected to the first relay 141 and the second relay 142, which enables the processor 120 to directly control the first relay 141 and the second relay 142; when the lamp is powered on, the processor 120 can determine whether the first lamp 171 and the second lamp 172 in the airport are in a normal state or a damaged state according to signals of the four operational amplifiers, if the first lamp 171 is in the normal state, the processor 120 sends a signal to the first relay 141, so that the movable end 1413 of the first relay 141 is communicated with the normally open end 1411, and at the moment, current passes through the first lamp 171 to enable the first lamp 171 to work normally. If the second lamp 172 is in the normal state, the processor 120 sends a signal to the second relay 142 to connect the movable end 1413 of the second relay 142 with the normally open end 1411, and at this time, the current passes through the second lamp 172 to enable the second lamp 172 to operate normally.
If a fault occurs after the first lamp 171 or the second lamp 172 at the airport is normally started, for example, the first lamp 171 is open due to a fault, at this time, the active end 1413 of the first relay 141 is still communicated with the normally open end 1411, so the first operational amplifier 131 still outputs a low level, and after the lamp is started, the third operational amplifier 133 determines whether the lamp is faulty instead of determining whether the lamp is faulty according to the output signal of the first operational amplifier 131. Since the active end 1413 of the first relay 141 is communicated with the normally open end 1411, when the first lamp 171 is in a fault open circuit, the whole circuit is in an open circuit state, and when the constant current source 110 is in an open circuit, a high voltage is generated, so as to trigger the first trigger tube 163, in this embodiment, the first trigger tube 163 and the second trigger tube 164 are both bidirectional trigger diodes, the first thyristor 161 and the second thyristor 162 are both bidirectional thyristors, when the first trigger tube 163 is turned on, the first thyristor 161 can be triggered to be turned on, and a voltage signal is generated through the third resistor 183, and is transmitted to the processor 120 through the third operational amplifier 133, the processor 120 controls the first relay 141 to reset, and after the reset, the active end 1413 of the first relay 141 is communicated with the normally closed end 1412, so as to short-circuit the first lamp 171. Meanwhile, the second lamp 172 normally operates, and the worker can maintain the second lamp 172 normally operating, so that inconvenience is not brought to normal operation of the airport. Since the operation principle of the second lamp 172 is the same as that of the first lamp 171 when the second lamp is failed, the detailed description thereof is omitted.
When the airport lamp fails and is maintained after normal starting operation, the basic principle is similar to that of starting. Taking the first lamp 171 as an example, after the first lamp 171 is damaged, the first relay 141 is reset, the active end 1413 thereof is communicated with the normally closed end 1412, the signal sent by the first operational amplifier 131 into the processor 120 is at a low level, so that the signal of the third operational amplifier 133 is not taken as a reference and the signal of the first operational amplifier 131 is taken as a reference, and the same-direction input end of the first operational amplifier 131 is connected with the first lamp 171, so that when the first lamp 171 of the airport lamp fails and is not repaired, the first operational amplifier 131 outputs a high level. If the first lamp 171 is just repaired, at this time, the equidirectional input end of the first operational amplifier 131 of the operational amplifier can be connected to the ground through the first lamp 171, the active end 1413 of the first relay 141 and the normally closed end 1412, so that after the first lamp 171 is repaired, the first operational amplifier 131 of the operational amplifier outputs a low level, accordingly, whether the first lamp 171 is repaired or not can be judged through the processor 120, and meanwhile, according to a signal of the first operational amplifier 131, the processor 120 can timely start the first relay 141 to enable the first lamp 171 to immediately enter a normal working state. Since the working principle of determining whether the second lamp 172 is repaired is substantially the same as the working principle of determining whether the first lamp 171 is repaired, the detailed description thereof is omitted.
In order to make the volume of the fault lamp detection circuit 100 smaller and more practical in practical use, in the present embodiment, the first operational amplifier 131, the second operational amplifier 132, the third operational amplifier 133 and the fourth operational amplifier 134 are integrated on a chip.
In addition, since the fault lamp detection circuit 100 according to the present embodiment is applied to an airport, the current range of the constant current source 110 is 2.8 to 6.6A. Of course, the fault lamp detection circuit 100 provided in this embodiment may also be applied to other places, and this embodiment does not limit this.
In the embodiment, the first lamp 171 and the second lamp 172 both include a light source or a sensor, and further, the light source includes a halogen light source and an LED light source.
Since the defective lamp detecting circuit 100 provided in the present embodiment includes the processor 120, various parameters can be set conveniently and flexibly. To avoid noise interfering with the malfunction, the processor 120 includes a digital filter.
Because the fault lamp detection circuit 100 provided by the embodiment can realize the functions of automatic detection and automatic reset, no manual intervention is needed, and the labor for maintenance is saved.
Second embodiment
Referring to fig. 4, an embodiment of the invention further provides a fault lamp detection system 200, where the fault lamp detection system 200 includes a plurality of fault lamp detection circuits 100 according to the first embodiment, and a plurality of lamp modules 170 of the fault lamp detection circuits are connected in series.
Specifically, since a plurality of light sources are provided in an airport and the light sources are connected in series, since the distance between each light source is long, in the present embodiment, in order to reduce the wiring cost, one defective lamp detecting circuit 100 is provided for every two light sources as one lamp module, that is, for two light sources. Thereby reducing wiring costs.
In summary, the invention provides a fault lamp detection circuit and a system, the fault lamp detection circuit includes a processor, a constant current source, a reference power supply, an operational amplifier module, a lamp module, a switch module, a resistance module and a relay module, when the lamp module fails, a state signal output by the operational amplifier module and a conduction state of the switch module change, so that by judging the state signal output by the operational amplifier module and the conduction state of the switch module, the processor can judge whether the lamp module fails, and then control a connection state of the relay, so that an undamaged light source in the lamp module can normally operate. On the one hand, the processor can automatically realize the detection of the fault lamp by judging whether the lamp module breaks down or not, so that manual operation is not needed, and the lamp module is more convenient. On the other hand, after the fault of the lamp module is detected, the processor can also control the connection state of the relay, so that the undamaged light source in the lamp module can normally operate, one lamp is damaged in actual use, but other lamps can operate for a longer time, and the normal operation of an airport is not inconvenient.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (9)
1. A fault lamp detection circuit is characterized by comprising a processor, a constant current source, a reference power source, an operational amplifier module, a lamp module, a switch module, a resistance module and a relay module, wherein the processor is respectively electrically connected with the operational amplifier module and the relay module, the constant current source is respectively electrically connected with the switch module, the relay module and the lamp module, the relay module is electrically connected with the lamp module, the switch module is electrically connected with the operational amplifier module, the reference power source is electrically connected with the operational amplifier module, the resistance module is electrically connected with the lamp module, the switch module is used for being conducted when the lamp module is in a disconnected state, the operational amplifier module is used for outputting a state signal according to the on-off state of the lamp module and the on-off state of the switch module, the processor is used for controlling the connection state of the relay module according to the state signal so as to enable the undamaged lamps in the lamp module to normally operate;
wherein, the operational amplifier module comprises a first operational amplifier, a second operational amplifier, a third operational amplifier and a fourth operational amplifier, the lamp module comprises a first lamp and a second lamp, the switch module comprises a first silicon controlled rectifier, a second silicon controlled rectifier, a first trigger tube and a second trigger tube, the relay module comprises a first relay and a second relay, the resistance module comprises a first resistance, a second resistance, a third resistance and a fourth resistance, the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier are all electrically connected with the reverse input end of the reference power supply, the output ends of the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier are all electrically connected with the processor, and the processor is respectively electrically connected with the first relay and the second relay, the constant current source, the first lamp and the first resistor are sequentially connected in series and then grounded, the constant current source, the second lamp and the second resistor are also sequentially connected in series and then grounded, the first relay is electrically connected with the first lamp, the second relay is electrically connected with the second lamp and then electrically connected with the first relay, one end of the first resistor connected with the first lamp is electrically connected with the in-phase input end of the first operational amplifier, one end of the second resistor connected with the second lamp is electrically connected with the in-phase input end of the second operational amplifier, the first trigger tube is connected with the first thyristor in parallel, and the first trigger tube is respectively connected with the in-phase input end of the third operational amplifier, One end of the third resistor is electrically connected, the other end of the third resistor is grounded, one end of the controlled silicon is also grounded, the second trigger tube is connected with the second controlled silicon in parallel, the second trigger tube is respectively electrically connected with the homodromous input end of the fourth operational amplifier and one end of the fourth resistor, the other end of the fourth resistor is grounded, and one end of the controlled silicon is also grounded.
2. The malfunction light detection circuit according to claim 1, wherein the first relay and the second relay each include a single-pole double-throw relay, the single-pole double-throw relay including a normally-open end, a normally-closed end, and a movable end, the normally-open end and the normally-closed end of the first relay being electrically connected to both ends of the first light fixture, respectively, the normally-open end and the normally-closed end of the second relay being electrically connected to both ends of the second light fixture, respectively, and the movable end of the first relay being electrically connected to the movable end of the second relay.
3. The faulty lamp detection circuit of claim 1, wherein said first operational amplifier, said second operational amplifier, said third operational amplifier and said fourth operational amplifier are integrated on a chip.
4. The fault lamp detection circuit of claim 1, wherein the first thyristor and the second thyristor are both triacs.
5. The faulty lamp detection circuit of claim 1, wherein the first and second light fixtures each comprise a light source or a sensor.
6. The fault lamp detection circuit as claimed in claim 5, wherein said light source comprises a halogen light source and an LED light source.
7. The fault lamp detection circuit of claim 1, wherein the constant current source has a current in the range of 2.8 to 6.6A.
8. The faulty lamp detection circuit as claimed in claim 1, wherein said processor comprises a digital filter.
9. A faulty lamp detection system, characterized in that said faulty lamp detection system comprises a plurality of faulty lamp detection circuits according to any one of claims 1 to 8, and that the luminaire modules of a plurality of said faulty lamp detection circuits are connected in series.
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| CN201810332252.2A CN108761355B (en) | 2018-04-13 | 2018-04-13 | Fault lamp detection circuit and system |
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| CN201810332252.2A CN108761355B (en) | 2018-04-13 | 2018-04-13 | Fault lamp detection circuit and system |
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| CN108761355A (en) | 2018-11-06 |
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