CN110557866A

CN110557866A - LED lighting system with cold wire supervision function

Info

Publication number: CN110557866A
Application number: CN201910859272.XA
Authority: CN
Inventors: 王力; 徐伟光; 张旭; 王维; 彭湃
Original assignee: China Railway Engineering Consulting Group Co Ltd
Current assignee: China Railway Engineering Consulting Group Co Ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2019-12-10
Anticipated expiration: 2039-09-11
Also published as: CN110557866B

Abstract

The invention relates to the technical field of urban rail transit equipment, in particular to an LED lighting system with a cold wire supervision function. The LED power supply circuit comprises an LED power supply circuit and a singlechip U1; the LED power supply circuit comprises a first connection point 1 and a second connection point 2 which are used for collecting current in the LED power supply circuit, the LED power supply circuit further comprises a third connection point 3, a fourth connection point 4 and a fifth connection point 5 which are used for collecting voltage in the LED power supply circuit, and the first connection point 1, the second connection point 2, the third connection point 3, the fourth connection point 4 and the fifth connection point 5 are respectively connected with a single chip microcomputer U1. According to the invention, through the research on the intelligent LED lighting system with the cold wire supervision function, the state of the lighting filament of the outdoor signal lamp can be monitored in real time, the collected information is transmitted back to the indoor terminal through the cable, the terminal carries out data retention and fault prompt, the degradation trend of the state and the electrical characteristics of the filament is pre-judged in advance, and the number of the lighting-out faults of the annunciator is greatly reduced.

Description

LED lighting system with cold wire supervision function

Technical Field

The invention relates to the technical field of urban rail transit equipment, in particular to an LED lighting system with a cold wire supervision function.

Background

The urban rail transit line adopting the ATC system which is opened at present in China has the advantages that the requirement for the cold wire supervision function of the signal machine is increased in technical conditions and standards in recent years, but no actual product provides technical support and is implemented in actual engineering.

With the rapid development of rail transit projects, the existing signal machine application technology cannot adapt to the operation requirements.

For example:

The high-speed railway semaphore is in the off-state at ordinary times as reserve redundant equipment, and when main equipment trouble, could start the semaphore and regard as the substitution to use, so this semaphore should be able to regularly detect main, vice lamp automatically under the standby state to the state is good when guaranteeing to use.

The urban rail transit signal machine is used in the daytime and is used for detection at night. In order to ensure that the redundancy state of the equipment is good, a signaler needs to perform manual wire breaking tests on the lamp positions one by one periodically to detect the states of the auxiliary lamps, the alarm switching state and the alarm circuit. The whole test process is time-consuming and labor-consuming.

Disclosure of Invention

The invention provides an LED lighting system with a cold wire supervision function, which solves the technical problem that the state of each lamp position cannot be detected under the state that a signal machine does not light.

The technical scheme adopted by the invention is as follows:

an LED lighting system with a cold wire supervision function comprises an LED power supply circuit and a single chip microcomputer U1; the LED power supply circuit comprises a first connection point 1 and a second connection point 2 which are used for collecting current in the LED power supply circuit, the LED power supply circuit also comprises a third connection point 3, a fourth connection point 4 and a fifth connection point 5 which are used for collecting voltage in the LED power supply circuit, and the first connection point 1, the second connection point 2, the third connection point 3, the fourth connection point 4 and the fifth connection point 5 are respectively connected with a single chip microcomputer U1; the LED power supply circuit comprises a third joint J3, a fourth joint J4, a seventh joint J7, an eighth joint J8 and a ninth joint J9, wherein the third joint J3 is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the fourth joint J4 is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the seventh joint J7 is connected with the common end of the LED, the eighth joint J8 is connected with the main wire end of the LED, and the ninth joint J9 is connected with the auxiliary wire end of the LED.

Further, the third joint J3 and the fourth joint J4 are both connected to the output end of the transformer. The first connecting point 1 is connected with a pin No. 2 of the single chip microcomputer U1, the second connecting point 2 is connected with a pin No. 3 of the single chip microcomputer U1, the third connecting point 3 is connected with a pin No. 4 of the single chip microcomputer U1, the fourth connecting point 4 is connected with a pin No. 5 of the single chip microcomputer U1, and the fifth connecting point 5 is connected with a pin No. 7 of the single chip microcomputer U1.

Furthermore, the system also comprises a singlechip power supply circuit and an alarm output circuit, wherein the singlechip power supply circuit comprises a first joint J1, a second joint J2 and a seventh connection point BCC, and the first joint J1 and the second joint J2 are respectively connected with the input end of the singlechip power supply circuit; the alarm output circuit comprises a fifth joint J5, a sixth joint J6, a tenth joint J10, a sixth connection point 6, an eighth connection point DS1, an eleventh connection point BJ and an alarm relay JDQ 1; the alarm relay JDQ1 is respectively connected with a seventh connection point BCC, a tenth connection point J10, an eighth connection point DS1 and an eleventh connection point BJ, the eighth connection point DS1 is respectively connected with a sixth connection point J6 and an alarm relay JDQ1, the eleventh connection point BJ is respectively connected with an alarm relay JDQ1 and a single chip microcomputer U1, the fifth connection point J5 is arranged at the input end of the alarm output circuit and is connected with an inspection signal line, and the sixth connection point J6 and the tenth connection point J10 are both connected with an output device. The output device includes a display or the like.

Furthermore, the eighth connection point DS1 is connected to pin 1 of the alarm relay JDQ1, the tenth connection point J10 is connected to pin 2 of the alarm relay JDQ1, the eleventh connection point BJ is connected to pin 15 of the single chip microcomputer U1 and pin 4 of the alarm relay JDQ1, the sixth connection point 6 is connected to pin 26 of the single chip microcomputer U1, and the seventh connection point BCC is connected to pin 5 of the alarm relay JDQ 1.

Furthermore, the first rectifying and filtering circuit and the second rectifying and filtering circuit are provided with redundancy, the third joint J3 is respectively connected with the first rectifying bridge Q2 in the first rectifying and filtering circuit and the second rectifying bridge Q3 in the second rectifying and filtering circuit, and the fourth joint J4 is respectively connected with the first rectifying bridge Q2 and the second rectifying bridge Q3; the first rectifying and filtering circuit further comprises a sixth capacitor C6, a seventh capacitor C7, a thirteenth resistor R13 and a fourteenth resistor R14, the thirteenth resistor R13 and the fourteenth resistor R14 are connected in series and then connected in parallel with the sixth capacitor C6 and the seventh capacitor C7, and the fourth connection point 4 is arranged between the thirteenth capacitor R13 and the fourteenth capacitor R14; the second rectifying and filtering circuit further comprises an eighth capacitor C8, a ninth capacitor C9, a fifteenth resistor R15 and a sixteenth resistor R16, the fifteenth resistor R15 and the sixteenth resistor R16 are connected in series and then connected in parallel with the eighth capacitor C8 and the ninth capacitor C9, the fifth connection point 5 is arranged between the fifteenth capacitor R15 and the sixteenth capacitor R16, the sixth capacitor C6 and the seventh capacitor C7 are energy storage capacitors of the first rectifying and filtering circuit, and the eighth capacitor C8 and the ninth capacitor C9 are energy storage capacitors of the second rectifying and filtering circuit.

Further, the LED power supply circuit further includes a first fet S4 and a second fet S2, a drain of the first fet S4 is connected to a twelfth connection point LEDZ, the twelfth connection point LEDZ is respectively connected to an eighth junction J8 and a seventh transistor S7, a collector of the seventh transistor S7 is connected to the twelfth connection point LEDZ, and a base and an emitter of the seventh transistor S7 are both connected to the single-chip U1; the grid electrode of the first field effect transistor S4 is connected with the collector electrode of a third triode S3, the base electrode of the third triode S3 is connected with the single chip microcomputer U1 through a tenth connection point ZHU, and the emitting electrode of the third triode S3 is grounded; the source electrode of the first field effect transistor S4 is connected with a first connection point 1;

The drain electrode of the second field effect transistor S2 is connected with a thirteenth connection point LEDF, the thirteenth connection point LEDF is respectively connected with a ninth joint J9 and an eighth triode S8, the collector electrode of the eighth triode S8 is connected with the thirteenth connection point LEDF, and the base electrode and the emitter electrode of the eighth triode S8 are both connected with a single chip microcomputer U1; the grid electrode of the second field effect transistor S2 is connected with the collector electrode of a first triode S1, the base electrode of the first triode S1 is connected with the single chip microcomputer U1 through a ninth connection point FU, and the emitting electrode of the first triode S1 is grounded; the source of the second fet S2 is connected to the second connection point 2.

Further, the ninth connection point FU is connected to pin 11 of the single chip microcomputer U1, the tenth connection point ZHU is connected to pin 14 of the single chip microcomputer U1, the base of the seventh triode S7 is connected to pin 13 of the single chip microcomputer U1, the emitter of the seventh triode S7 is connected to pin 2 of the single chip microcomputer U1 through the first connection point 1, the base of the eighth triode S8 is connected to pin 12 of the single chip microcomputer U1, and the emitter of the eighth triode S8 is connected to pin 3 of the single chip microcomputer U1 through the second connection pipe 2.

Further, a second diode D2, a third diode D3, a nineteenth resistor R19 and a second resistor R2 are sequentially connected in series in the LED power supply circuit, one end of the second diode D2 is connected to the third diode D3, the other end of the second diode D2 is connected to a seventh joint J7, an eighth joint J8 and a ninth joint J9, the second diode D2 and the third diode D3 are voltage-stabilizing diodes, one end of the second resistor R2 is connected to the nineteenth resistor R19, and the other end of the second resistor R2 is grounded; the LED power supply circuit is further provided with a fourth diode D4, a fifth diode D5, a seventh resistor R7 and an eighth resistor R8 which are sequentially connected in series, one end of the eighth resistor R8 is connected with the seventh resistor R7, the other end of the eighth resistor R8 is grounded, one end of a fourth diode D4 is connected with the fifth diode D5, the other end of the fourth diode D4 is connected with a seventh joint J7, an eighth joint J8 and a ninth joint J9, and the fourth diode D4 and the fifth diode D5 are voltage stabilizing diodes.

Further, the system also comprises a dial switch SW1, wherein the dial switch SW1 is connected with the single chip microcomputer U1.

Further, the model of the single chip microcomputer U1 is PIC18F25K 80.

The invention has the beneficial effects that:

According to the invention, through the research on the intelligent LED lighting system with the cold wire supervision function, the state of the lighting filament of the outdoor signal lamp can be monitored in real time, the collected information is transmitted back to the indoor terminal through the cable, the terminal carries out data retention and fault prompt, the degradation trend of the state and the electrical characteristics of the filament is pre-judged in advance, and the number of the lighting-out faults of the annunciator is greatly reduced.

Through the research to the intelligent LED lighting system who possesses cold filament supervision function, in the skylight period, give the instruction of patrolling and examining to semaphore owner filament collection system through indoor terminal, main filament collection system patrols and examines according to the instruction to the primary and secondary side voltage of spot light unit, the main and secondary lamp state under the cold state, alarm circuit state, and self-checking simultaneously to upload indoor terminal and signal centralized monitoring with the monitoring data, carry out the reservation and the trouble suggestion of monitoring data by indoor terminal. By utilizing the system, the I-level electrical characteristic test mode of the annunciator once a year is changed into an intelligent timing inspection mode.

The third joint J3 and the fourth joint J4 of the invention are connected with the output end of the transformer lighting power supply and are used for lighting the LED. Considering the reliability of outdoor long-term operation, a linear power supply is selected instead of a switching power supply. The alternating current power supply supplies power jointly after being rectified and filtered by two paths to form two-path redundancy, and one path of fault can still be lighted. The second diode D2, the third diode D3, the nineteenth resistor R19, the second resistor R2, the fourth diode D4, the fifth diode D5, the seventh resistor R7 and the eighth resistor R8 respectively form functions of a main wire and an auxiliary wire, when the voltage is lower than a set threshold voltage, the first field effect transistor S4 and the second field effect transistor S2 are not conducted, and therefore led is prevented from being turned on by mistake. The set threshold is such that the led will not light up when the voltage is not greater than 120V.

The first joint J1 and the second joint J2 supply power for the singlechip system.

When the LED is lighted, the singlechip acquires the voltage and the current of lighting so as to judge the working state of the LED. When the main wire has a short circuit or open circuit fault, the auxiliary wire is switched to be lightened, and positioning alarm is carried out. The filament switching and alarming are completed by the single chip microcomputer.

The fifth joint J5 meets the patrol line. When the lighting system is electrified to work, the inspection line provides an inspection signal; when the lighting system is not powered on, the inspection line supplies power to the single chip microcomputer U1 of the lighting system while providing an inspection signal, so that the single chip microcomputer U1 works. And after receiving the inspection signal, the single chip microcomputer U1 transmits the state information of the lighting system and the LED lamp holder to an indoor inspection switchboard.

Drawings

FIG. 1 is a schematic circuit diagram of a system according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of region A in FIG. 1;

FIG. 3 is an enlarged schematic view of region E in FIG. 2;

FIG. 4 is an enlarged schematic view of region F of FIG. 2;

FIG. 5 is an enlarged schematic view of region B of FIG. 1;

FIG. 6 is an enlarged schematic view of region C of FIG. 1;

fig. 7 is an enlarged schematic view of region D in fig. 1.

Detailed Description

Exemplary embodiments will be described in detail herein. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

example 1

As shown in fig. 1 to 7, the present embodiment shows an LED lighting system with a cold filament supervision function, which includes an LED power supply circuit and a single chip microcomputer U1; the LED power supply circuit comprises a first connection point 1 and a second connection point 2 which are used for collecting current in the LED power supply circuit, the LED power supply circuit also comprises a third connection point 3, a fourth connection point 4 and a fifth connection point 5 which are used for collecting voltage in the LED power supply circuit, and the first connection point 1, the second connection point 2, the third connection point 3, the fourth connection point 4 and the fifth connection point 5 are respectively connected with a single chip microcomputer U1; the LED power supply circuit comprises a third joint J3, a fourth joint J4, a seventh joint J7, an eighth joint J8 and a ninth joint J9, wherein the third joint J3 is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the fourth joint J4 is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the seventh joint J7 is connected with the common end of the LED, the eighth joint J8 is connected with the main wire end of the LED, and the ninth joint J9 is connected with the auxiliary wire end of the LED.

The third joint J3 and the fourth joint J4 are both connected with the output end of the transformer. The first connecting point 1 is connected with a pin No. 2 of the single chip microcomputer U1, the second connecting point 2 is connected with a pin No. 3 of the single chip microcomputer U1, the third connecting point 3 is connected with a pin No. 4 of the single chip microcomputer U1, the fourth connecting point 4 is connected with a pin No. 5 of the single chip microcomputer U1, and the fifth connecting point 5 is connected with a pin No. 7 of the single chip microcomputer U1.

The system also comprises a singlechip power supply circuit and an alarm output circuit, wherein the singlechip power supply circuit comprises a first joint J1, a second joint J2 and a seventh connection point BCC, and the first joint J1 and the second joint J2 are respectively connected with the input end of the singlechip power supply circuit; the alarm output circuit comprises a fifth joint J5, a sixth joint J6, a tenth joint J10, a sixth connection point 6, an eighth connection point DS1, an eleventh connection point BJ and an alarm relay JDQ 1; the alarm relay JDQ1 is respectively connected with a seventh connection point BCC, a tenth connection point J10, an eighth connection point DS1 and an eleventh connection point BJ, the eighth connection point DS1 is respectively connected with a sixth connection point J6 and an alarm relay JDQ1, the eleventh connection point BJ is respectively connected with an alarm relay JDQ1 and a single chip microcomputer U1, the fifth connection point J5 is arranged at the input end of the alarm output circuit and is connected with an inspection signal line, and the sixth connection point J6 and the tenth connection point J10 are both connected with an output device. The output device includes a display or the like.

The eighth connecting point DS1 is connected with pin No. 1 of an alarm relay JDQ1, the tenth joint J10 is connected with pin No. 2 of the alarm relay JDQ1, the eleventh connecting point BJ is connected with pin No. 15 of a single chip microcomputer U1 and pin No. 4 of the alarm relay JDQ1 respectively, the sixth connecting point 6 is connected with pin No. 26 of a single chip microcomputer U1, and the seventh connecting point BCC is connected with pin No. 5 of the alarm relay JDQ 1.

The first rectifying and filtering circuit and the second rectifying and filtering circuit are arranged in a redundant mode, the third joint J3 is respectively connected with a first rectifying bridge Q2 in the first rectifying and filtering circuit and a second rectifying bridge Q3 in the second rectifying and filtering circuit, and the fourth joint J4 is respectively connected with a first rectifying bridge Q2 and a second rectifying bridge Q3; the first rectifying and filtering circuit further comprises a sixth capacitor C6, a seventh capacitor C7, a thirteenth resistor R13 and a fourteenth resistor R14, the thirteenth resistor R13 and the fourteenth resistor R14 are connected in series and then connected in parallel with the sixth capacitor C6 and the seventh capacitor C7, and the fourth connection point 4 is arranged between the thirteenth capacitor R13 and the fourteenth capacitor R14; the second rectifying and filtering circuit further comprises an eighth capacitor C8, a ninth capacitor C9, a fifteenth resistor R15 and a sixteenth resistor R16, the fifteenth resistor R15 and the sixteenth resistor R16 are connected in series and then connected in parallel with the eighth capacitor C8 and the ninth capacitor C9, the fifth connection point 5 is arranged between the fifteenth capacitor R15 and the sixteenth capacitor R16, the sixth capacitor C6 and the seventh capacitor C7 are energy storage capacitors of the first rectifying and filtering circuit, and the eighth capacitor C8 and the ninth capacitor C9 are energy storage capacitors of the second rectifying and filtering circuit.

The LED power supply circuit further comprises a first field-effect tube S4 and a second field-effect tube S2, the drain electrode of the first field-effect tube S4 is connected with a twelfth connection point LEDZ, the twelfth connection point LEDZ is respectively connected with an eighth joint J8 and a seventh triode S7, the collector electrode of the seventh triode S7 is connected with the twelfth connection point LEDZ, and the base electrode and the emitter electrode of the seventh triode S7 are both connected with a single chip microcomputer U1; the grid electrode of the first field effect transistor S4 is connected with the collector electrode of a third triode S3, the base electrode of the third triode S3 is connected with the single chip microcomputer U1 through a tenth connection point ZHU, and the emitting electrode of the third triode S3 is grounded; the source electrode of the first field effect transistor S4 is connected with a first connection point 1;

the ninth connection point FU is connected with a pin 11 of the single chip microcomputer U1, the tenth connection point ZHU is connected with a pin 14 of the single chip microcomputer U1, the base of the seventh triode S7 is connected with a pin 13 of the single chip microcomputer U1, the emitter of the seventh triode S7 is connected with a pin 2 of the single chip microcomputer U1 through the first connection point 1, the base of the eighth triode S8 is connected with a pin 12 of the single chip microcomputer U1, and the emitter of the eighth triode S8 is connected with a pin 3 of the single chip microcomputer U1 through the second connection pipe 2.

The LED power supply circuit is further provided with a second diode D2, a third diode D3, a nineteenth resistor R19 and a second resistor R2 which are sequentially connected in series, one end of the second diode D2 is connected with the third diode D3, the other end of the second diode D2 is respectively connected with a seventh joint J7, an eighth joint J8 and a ninth joint J9, the second diode D2 and the third diode D3 are voltage stabilizing diodes, one end of the second resistor R2 is connected with the nineteenth resistor R19, and the other end of the second resistor R2 is grounded; the LED power supply circuit is further provided with a fourth diode D4, a fifth diode D5, a seventh resistor R7 and an eighth resistor R8 which are sequentially connected in series, one end of the eighth resistor R8 is connected with the seventh resistor R7, the other end of the eighth resistor R8 is grounded, one end of a fourth diode D4 is connected with the fifth diode D5, the other end of the fourth diode D4 is connected with a seventh joint J7, an eighth joint J8 and a ninth joint J9, and the fourth diode D4 and the fifth diode D5 are voltage stabilizing diodes.

The system also comprises a dial switch SW1, the dial switch SW1 is connected with the single chip microcomputer U1, different lighting units of the dial switch SW1 are dialed by different codes, and the indoor positioning alarm is realized by identifying the lighting units. Pin 1 of the dial switch SW1 is connected with pin 25 of the single chip microcomputer U1, pin 2 of the dial switch SW1 is connected with pin 24 of the single chip microcomputer U1, pin 3 of the dial switch SW1 is connected with pin 23 of the single chip microcomputer U1, pin 4 of the dial switch SW1 is connected with pin 22 of the single chip microcomputer U1, pin 5 of the dial switch SW1 is connected with pin 21 of the single chip microcomputer U1, pin 6 of the dial switch SW1 is connected with pin 18 of the single chip microcomputer U1, pin 7 of the dial switch SW1 is connected with pin 17 of the single chip microcomputer U1, and pin 8 of the dial switch SW1 is connected with pin 16 of the single chip microcomputer U1.

The single chip microcomputer U1 adopts PIC18F25K80 of microchip company. The single chip microcomputer comprises 25 IO pins and 8 paths of 12-bit AD conversion channels, and can meet the requirements of a system.

the third joint J3 and the fourth joint J4 are connected to the output terminal of the transformer lighting power supply for lighting the LEDs. Considering the reliability of outdoor long-term operation, a linear power supply is selected instead of a switching power supply. The alternating current power supply supplies power jointly after being rectified and filtered by two paths to form two-path redundancy, and one path of fault can still be lighted. The second diode D2, the third diode D3, the nineteenth resistor R19, the second resistor R2, the fourth diode D4, the fifth diode D5, the seventh resistor R7 and the eighth resistor R8 respectively form functions of a main wire and an auxiliary wire, when the voltage is lower than a set threshold voltage, the first field effect transistor S4 and the second field effect transistor S2 are not conducted, and therefore led is prevented from being turned on by mistake. The set threshold is such that the led will not light up when the voltage is not greater than 120V. The first joint J1 and the second joint J2 supply power for the singlechip system.

as will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagram illustrations of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or side component of the flow diagrams and/or side component diagrams, and combinations of flows and/or side components in the flow diagrams and/or side component diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. the utility model provides a LED lighting system that possesses cold silk supervision function which characterized in that: comprises an LED power supply circuit and a singlechip (U1); the LED power supply circuit comprises a first connection point (1) and a second connection point (2) which are used for collecting current in the LED power supply circuit, the LED power supply circuit further comprises a third connection point (3), a fourth connection point (4) and a fifth connection point (5) which are used for collecting voltage in the LED power supply circuit, and the first connection point (1), the second connection point (2), the third connection point (3), the fourth connection point (4) and the fifth connection point (5) are respectively connected with a single chip microcomputer (U1); the LED power supply circuit comprises a third joint (J3), a fourth joint (J4), a seventh joint (J7), an eighth joint (J8) and a ninth joint (J9), wherein the third joint (J3) is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the fourth joint (J4) is connected with the input ends of the first rectifying and filtering circuit and the second rectifying and filtering circuit respectively, the seventh joint (J7) is connected with the common end of the LED, the eighth joint (J8) is connected with the main wire end of the LED, and the ninth joint (J9) is connected with the auxiliary wire end of the LED.

2. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the third joint (J3) and the fourth joint (J4) are both connected with the output end of the transformer. No. 2 pins of first tie point (1) and singlechip (U1) link to each other, No. 3 pins of second tie point (2) and singlechip (U1) link to each other, No. 4 pins of third tie point (3) and singlechip (U1) link to each other, No. 5 pins of fourth tie point (4) and singlechip (U1) link to each other, No. 7 pins of fifth tie point (5) and singlechip (U1) link to each other.

3. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the system further comprises a singlechip power supply circuit and an alarm output circuit, wherein the singlechip power supply circuit comprises a first joint (J1), a second joint (J2) and a seventh connection point (BCC), and the first joint (J1) and the second joint (J2) are respectively connected with the input end of the singlechip power supply circuit; the alarm output circuit comprises a fifth joint (J5), a sixth joint (J6), a tenth joint (J10), a sixth connection point (6), an eighth connection point (DS1), an eleventh connection point (BJ) and an alarm relay (JDQ 1); the alarm relay (JDQ1) is connected with a seventh connection point (BCC), a tenth connection point (J10), an eighth connection point (DS1) and an eleventh connection point (BJ) respectively, the eighth connection point (DS1) is connected with a sixth connection point (J6) and an alarm relay (JDQ1) respectively, the eleventh connection point (BJ) is connected with an alarm relay (JDQ1) and a single chip microcomputer (U1) respectively, a fifth connection point (J5) is arranged at the input end of an alarm output circuit and is connected with an inspection signal line, and the sixth connection point (J6) and the tenth connection point (J10) are connected with an output device.

4. The LED lighting system with a cold wire supervision function according to claim 3, characterized in that: eighth tie point (DS1) link to each other with alarm relay (JDQ1) pin number 1, tenth joint (J10) links to each other with alarm relay (JDQ1) pin number 2, eleventh tie point (BJ) links to each other with singlechip (U1) pin number 15 and alarm relay (JDQ1) pin number 4 respectively, sixth tie point (6) link to each other with singlechip (U1) pin number 26, seventh tie point (BCC) links to each other with alarm relay (JDQ1) pin number 5.

5. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the first rectifying and filtering circuit and the second rectifying and filtering circuit are arranged in a redundant mode, the third joint (J3) is respectively connected with a first rectifying bridge (Q2) in the first rectifying and filtering circuit and a second rectifying bridge (Q3) in the second rectifying and filtering circuit, and the fourth joint (J4) is respectively connected with a first rectifying bridge (Q2) and a second rectifying bridge (Q3); the first rectifying and filtering circuit further comprises a sixth capacitor (C6), a seventh capacitor (C7), a thirteenth resistor (R13) and a fourteenth resistor (R14), the thirteenth resistor (R13) and the fourteenth resistor (R14) are connected in series and then are connected with the sixth capacitor (C6) and the seventh capacitor (C7) in parallel, and the fourth connection point (4) is arranged between the thirteenth capacitor (R13) and the fourteenth capacitor (R14); the second rectifying and filtering circuit further comprises an eighth capacitor (C8), a ninth capacitor (C9), a fifteenth resistor (R15) and a sixteenth resistor (R16), the fifteenth resistor (R15) and the sixteenth resistor (R16) are connected in series and then are connected in parallel with the eighth capacitor (C8) and the ninth capacitor (C9), the fifth connection point (5) is arranged between the fifteenth capacitor (R15) and the sixteenth capacitor (R16), the sixth capacitor (C6) and the seventh capacitor (C7) are energy storage capacitors of the first rectifying and filtering circuit, and the eighth capacitor (C8) and the ninth capacitor (C9) are energy storage capacitors of the second rectifying and filtering circuit.

6. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the LED power supply circuit further comprises a first field-effect tube (S4) and a second field-effect tube (S2), the drain electrode of the first field-effect tube (S4) is connected with a twelfth connection point (LEDZ), the twelfth connection point (LEDZ) is respectively connected with an eighth connector (J8) and a seventh triode (S7), the collector electrode of the seventh triode (S7) is connected with the twelfth connection point (LEDZ), and the base electrode and the emitter electrode of the seventh triode (S7) are both connected with the single chip microcomputer (U1); the grid electrode of the first field effect transistor (S4) is connected with the collector electrode of a third triode (S3), the base electrode of the third triode (S3) is connected with a single chip microcomputer (U1) through a tenth connection point (ZHU), and the emitting electrode of the third triode (S3) is grounded; the source electrode of the first field effect transistor (S4) is connected with the first connecting point (1);

The drain electrode of the second field effect transistor (S2) is connected with a thirteenth connection point (LEDF), the thirteenth connection point (LEDF) is respectively connected with a ninth connector (J9) and an eighth triode (S8), the collector electrode of the eighth triode (S8) is connected with the thirteenth connection point (LEDF), and the base electrode and the emitter electrode of the eighth triode (S8) are both connected with the single chip microcomputer (U1); the grid electrode of the second field effect transistor (S2) is connected with the collector electrode of a first triode (S1), the base electrode of the first triode (S1) is connected with a single chip microcomputer (U1) through a ninth connection point (FU), and the emitting electrode of the first triode (S1) is grounded; the source of the second field effect transistor (S2) is connected to the second connection point (2).

7. the LED lighting system with a cold wire supervision function according to claim 6, characterized in that: the ninth connection point (FU) is connected with pin 11 of the single chip microcomputer (U1), the tenth connection point (ZHU) is connected with pin 14 of the single chip microcomputer (U1), the base of the seventh triode (S7) is connected with pin 13 of the single chip microcomputer (U1), the emitter of the seventh triode (S7) is connected with pin 2 of the single chip microcomputer (U1) through the first connection point (1), the base of the eighth triode (S8) is connected with pin 12 of the single chip microcomputer (U1), and the emitter of the eighth triode (S8) is connected with pin 3 of the single chip microcomputer (U1) through the second connection pipe (2).

8. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the LED power supply circuit is further provided with a second diode (D2), a third diode (D3), a nineteenth resistor (R19) and a second resistor (R2), wherein the second diode (D2) is connected with the third diode (D3) in series in sequence, one end of the second diode (D2) is connected with a seventh joint (J7), an eighth joint (J8) and a ninth joint (J9) in series, the second diode (D2) and the third diode (D3) are voltage stabilizing diodes, one end of the second resistor (R2) is connected with the nineteenth resistor (R19), and the other end of the second resistor (R2) is grounded; the LED power supply circuit is further provided with a fourth diode (D4), a fifth diode (D5), a seventh resistor (R7) and an eighth resistor (R8) which are sequentially connected in series, one end of the eighth resistor (R8) is connected with the seventh resistor (R7), the other end of the eighth resistor (R8) is grounded, one end of the fourth diode (D4) is connected with the fifth diode (D5), the other end of the fourth diode is connected with a seventh joint (J7), an eighth joint (J8) and a ninth joint (J9) respectively, and the fourth diode (D4) and the fifth diode (D5) are voltage stabilizing diodes.

9. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the system further comprises a dial switch (SW1), and the dial switch (SW1) is connected with the single chip microcomputer (U1).

10. The LED lighting system with a cold wire supervision function according to claim 1, characterized in that: the model of the single chip microcomputer (U1) is PIC18F25K 80.