CN116347706A - Traffic signal lamp power supply and control method - Google Patents
Traffic signal lamp power supply and control method Download PDFInfo
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- CN116347706A CN116347706A CN202310353622.1A CN202310353622A CN116347706A CN 116347706 A CN116347706 A CN 116347706A CN 202310353622 A CN202310353622 A CN 202310353622A CN 116347706 A CN116347706 A CN 116347706A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention provides a traffic signal lamp power supply and a control method. The traffic signal lamp power supply comprises a power supply module, wherein the power supply module is connected with a feedback control unit, a red light signal output unit, a green light signal output unit, a yellow light signal output unit, a red light signal rectification unit, a green light signal rectification unit and a yellow light signal rectification unit; the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are all connected with a photoelectric conversion module, the photoelectric conversion module is all connected with the feedback control unit, and the red light signal output unit, the green light signal output unit and the yellow light signal output unit are all connected with the feedback control unit. The traffic signal lamp power supply and the control method provided by the invention have the advantages of simplicity in implementation, stability, reliability and suitability for comprehensive popularization and application.
Description
Technical Field
The invention relates to the technical field of traffic signal devices, in particular to a traffic signal lamp power supply and a control method.
Background
At present, traffic signal lamps mainly have three colors of red, yellow and green, and usually, the signal lamps with three colors are a group for indicating traffic state. The signal lamp of each color is independently powered, the on-off of the signal lamps of different colors is mainly controlled by a power supply (220V in China generally) output by the signal machine, and when the signal machine outputs a red light power supply, the red light is lighted, and the like. The current technical scheme mainly has the difference in the types of signal lamp power supplies, the traffic signal lamp power supplies on the market mainly have the following types, the first type is a traditional power frequency transformer power supply mode, 220V voltage of mains supply is output to 24V through transformer transformation, then 24V power supply is input to a signal lamp board, and a constant current circuit is added to the signal lamp board at the same time, and then an LED signal lamp is driven to be lightened. The second mode is to adopt a high-frequency switch power supply mode, and supply power to the signal lamps with different colors of red, yellow and green through the switch power supply.
Objective drawbacks of the prior art: the traditional signal lamp is simple in implementation manner technically, but the lamps with different colors all need independent power supplies, so that the cost is relatively high, and the installation and the use are inconvenient. In the first way, a power frequency transformer is required for each color signal lamp, and a constant current power supply circuit is required to be added on a signal lamp panel. Taking red, yellow, green three-colour signal lamp as an example, this mode needs 3 industrial frequency transformers, and all need to increase constant current power supply drive circuit on red, yellow, green three-colour signal lamp plate, this kind of mode still can make the lamp plate wiring comparatively complicated, not only have LED lamp pearl plug-in components, also have paster devices such as constant current chip, resistance, and because the diameter of lamp plate is great, the diameter that the size is great has 400mm, consequently, can lead to welding process complicacy, the cost is higher scheduling problem, and VF value and drive current of the lamp pearl of different colours are also different, consequently, constant current power supply drive circuit is also different, in order to satisfy the requirement of different tone lamp pearls, this can lead to the PCB circuit board and the BOM of the lamp plate of different colours scheduling to be all different, the management cost also can be higher. The mode is characterized in that a power frequency transformer is adopted for transforming, so that the problem that the output voltage is low when the input voltage is low, the problem that the output current is unstable or the current is too low, and the stability is relatively poor can be solved. In the second mode, a high-frequency switching power supply is adopted for supplying power, and different switching power supplies are needed for signal lamp plates with different colors so as to meet the requirements of driving currents of signal lamps with different colors. The mode has relatively high cost and high requirement on a power supply, and special design is needed, such as lightning stroke, surge and the like, otherwise, the mode can cause the problems of damage and the like in summer lightning stroke. The two modes of the method need three groups of power supplies for the red, yellow and green three-color signal lamps, the power supplies are not universal, the installation is relatively complex, and the production cost is high.
Therefore, it is necessary to provide a new power supply and control method for traffic signal lamp to solve the above technical problems.
Disclosure of Invention
The invention solves the technical problem of providing the traffic signal lamp power supply and the control method which are simple to realize, stable and reliable and are suitable for comprehensive popularization and application.
In order to solve the technical problems, the traffic signal lamp power supply provided by the invention comprises: the power supply module is connected with a feedback control unit, a red light signal output unit, a green light signal output unit, a yellow light signal output unit, a red light signal rectification unit, a green light signal rectification unit and a yellow light signal rectification unit; the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are all connected with a photoelectric conversion module, the photoelectric conversion module is all connected with the feedback control unit, and the red light signal output unit, the green light signal output unit and the yellow light signal output unit are all connected with the feedback control unit.
Preferably, diodes are arranged between the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit and the corresponding photoelectric conversion modules.
Preferably, the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are respectively connected with a red light input signal, a yellow light input signal and a green light input signal.
Preferably, the signals rectified by the red light signal rectification unit, the green light signal rectification unit and the yellow light signal rectification unit are steamed bread waves of 100 HZ.
Preferably, the photoelectric conversion module is used for converting an input signal into a low-voltage detection signal after being isolated by an optical coupler.
The method also provides a control method of the traffic signal power supply, which comprises the following steps:
s1: the input of a red, yellow and green signal lamp is used as power input, and in order to avoid that various signals are electrified simultaneously when wiring errors occur, the red, yellow and green power supplies are rectified, and then diodes for preventing reverse current are added;
s2: the rectified signal is converted into a low-voltage detection signal after being isolated by an optical coupler, and then the low-voltage detection signal is linked with the output current, so that the lighting of the signal lamp is controlled.
Preferably, in the step S2, the step of linking the low voltage detection signal with the output current includes the following two methods: firstly, adding a filter capacitor to the pulse signal after the isolation conversion of the optocoupler, converting the pulse signal into a voltage signal, and driving a corresponding MOS tube by the voltage signal to control the feedback resistance of a power chip so as to control the current conduction of signal lamps with different colors; and secondly, detecting the pulse signals after the optical coupler isolation conversion through the singlechip, and controlling the corresponding MOS tube to control the feedback resistor of the power chip to be switched to the corresponding output current when the pulse signals exist continuously, namely indicating that the pulse signals are of the type of signal input, thereby controlling the current conduction of the signal lamps with different colors.
Compared with the related art, the traffic signal lamp power supply and the control method provided by the invention have the following beneficial effects:
the invention provides a traffic signal lamp power supply and a control method, which adopt innovative design on power supply and control, integrate red, yellow and green signal lamp power supplies into a whole, namely realize a set of power supply, and meet the requirements of power supply and automatic control of the red, yellow and green signal lamps. The circuit is provided with a red signal lamp control input interface, a yellow signal lamp control input interface and a red constant current power supply output interface, a yellow constant current power supply output interface and a green constant current power supply output interface, when the circuit is used, the red, yellow and green three-color output power supplies of the annunciator are only required to be connected to the corresponding input ports of the circuit board, and the output power supplies with corresponding colors are connected to the lamp panels with corresponding colors, so that the on-off control of the signal lamps with different colors can be realized. The red, yellow and green signal lamps of the mode only need to be provided with the power supply, and the power supply outputs stable current, so that any additional current control circuit is not needed to be additionally arranged on the lamp panel, only corresponding LED lamp beads are arranged on the lamp panel, the universality of the LED lamp panel is further improved, the requirements of different colors can be met only by welding different lamp beads on the same PCB lamp panel, and the wave soldering is convenient because of only the LED lamp beads, the protection of a patch device is not needed to be additionally considered, the cost of the jig is reduced, and the production cost is greatly reduced. The scheme has the advantages that lightning stroke, surge and static electricity are specially designed, the stability of a power supply is improved, the installation quantity of the power supply is reduced, the production efficiency is improved, and the cost is reduced. The scheme can also meet the application requirements of other types of signal lamps, is convenient to install and implement, and is suitable for comprehensive popularization.
Drawings
FIG. 1 is a schematic block diagram of a traffic signal light power supply provided by the present invention;
FIG. 2 is a circuit diagram of a traffic signal power supply provided by the invention;
FIG. 3 is an enlarged schematic view of portion A shown in FIG. 1;
fig. 4 is an enlarged schematic view of the portion B shown in fig. 1.
Description of the embodiments
The invention will be further described with reference to the drawings and embodiments.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, fig. 1 is a schematic block diagram of a traffic signal lamp power supply according to the present invention; FIG. 2 is a circuit diagram of a traffic signal power supply provided by the invention; FIG. 3 is an enlarged schematic view of portion A shown in FIG. 1; fig. 4 is an enlarged schematic view of the portion B shown in fig. 1. The traffic light power supply includes: the power supply module is connected with a feedback control unit, a red light signal output unit, a green light signal output unit, a yellow light signal output unit, a red light signal rectification unit, a green light signal rectification unit and a yellow light signal rectification unit; the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are all connected with a photoelectric conversion module, the photoelectric conversion module is all connected with the feedback control unit, and the red light signal output unit, the green light signal output unit and the yellow light signal output unit are all connected with the feedback control unit.
Diodes are arranged between the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit and the corresponding photoelectric conversion modules.
The red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are respectively connected with a red light input signal, a yellow light input signal and a green light input signal.
The signals rectified by the red light signal rectification unit, the green light signal rectification unit and the yellow light signal rectification unit are steamed bread waves of 100 HZ.
The photoelectric conversion module is used for converting an input signal into a low-voltage detection signal after being isolated by an optical coupler.
The method also provides a control method of the traffic signal power supply, which comprises the following steps:
s1: the input of a red, yellow and green signal lamp is used as power input, and in order to avoid that various signals are electrified simultaneously when wiring errors occur, the red, yellow and green power supplies are rectified, and then diodes for preventing reverse current are added;
s2: the rectified signal is converted into a low-voltage detection signal after being isolated by an optical coupler, and then the low-voltage detection signal is linked with the output current, so that the lighting of the signal lamp is controlled.
In the step S2, the low voltage detection signal is linked with the output current, which comprises the following two methods: firstly, adding a filter capacitor to the pulse signal after the isolation conversion of the optocoupler, converting the pulse signal into a voltage signal, and driving a corresponding MOS tube by the voltage signal to control the feedback resistance of a power chip so as to control the current conduction of signal lamps with different colors; and secondly, detecting the pulse signals after the optical coupler isolation conversion through the singlechip, and controlling the corresponding MOS tube to control the feedback resistor of the power chip to be switched to the corresponding output current when the pulse signals exist continuously, namely indicating that the pulse signals are of the type of signal input, thereby controlling the current conduction of the signal lamps with different colors.
The invention uses the characteristic that the signal lamps with different colors can not be lightened at the same time, reduces the power supply of the traditional signal lamp from a plurality of signal lamps to one signal lamp, reduces the cost of the signal lamp, improves the stability of the signal lamp, and can greatly reduce the volume and the cost of the shell due to the smaller volume of the power supply. The main innovation point of the invention is to reduce the power supply of the traditional signal lamp from a plurality of signal lamps to one by utilizing the characteristic that the signal lamps with different colors can not be lightened at the same time, and the power supply has the advantages of small volume, stability, reliability, lower cost and suitability for comprehensive popularization. Because the driving circuits of the signal lamps with different colors are different, the type of the input signal needs to be detected, and meanwhile, the power supply is required to output current values with different magnitudes for the signal lamps with different types, namely, the current output by the power supply can be automatically switched according to the type of the input signal. In order to achieve the purpose, the invention adopts a constant current power supply scheme, a power supply driving chip is internally provided with a MOSFET, and the output current can be regulated through the size of a feedback resistor. The input of the power supply utilizes the input of the red, yellow and green three-color signal lamps as the power supply input, and in order to avoid the simultaneous energization of various signals when the wiring is wrong, the proposal rectifies the red, yellow and green power supplies and then adds a diode for preventing reverse current. According to the scheme, an input power supply of a red, yellow and green three-color signal lamp is rectified, the rectified signal is 100HZ steamed bread wave, the signal is isolated by an optical coupler and then is converted into a low-voltage detection signal, and the signal is a pulse signal. In order to link the signal with the output current, the invention designs two schemes to realize the control of the feedback resistance of the power supply driving chip according to the type of the signal. The first scheme is that a filter capacitor is added to pulse signals after the isolation and conversion of the optocouplers, the pulse signals are converted into voltage signals, and the voltage signals drive corresponding MOS tubes to control feedback resistors of a power supply chip so as to solve the problem that signal lamp currents of different colors are different. The other scheme is that the singlechip detects the pulse signals after the optical coupler isolation conversion, when the pulse signals exist continuously, the pulse signals are indicated to be the type of signal input, and at the moment, the singlechip can control the corresponding MOS tube to control the feedback resistance of the power supply chip to be switched to the corresponding output current.
Compared with the related art, the traffic signal lamp power supply and the control method provided by the invention have the following beneficial effects:
the invention provides a traffic signal lamp power supply and a control method, which adopt innovative design on power supply and control, integrate red, yellow and green signal lamp power supplies into a whole, namely realize a set of power supply, and meet the requirements of power supply and automatic control of the red, yellow and green signal lamps. The circuit is provided with a red signal lamp control input interface, a yellow signal lamp control input interface and a red constant current power supply output interface, a yellow constant current power supply output interface and a green constant current power supply output interface, when the circuit is used, the red, yellow and green three-color output power supplies of the annunciator are only required to be connected to the corresponding input ports of the circuit board, and the output power supplies with corresponding colors are connected to the lamp panels with corresponding colors, so that the on-off control of the signal lamps with different colors can be realized. The red, yellow and green signal lamps of the mode only need to be provided with the power supply, and the power supply outputs stable current, so that any additional current control circuit is not needed to be additionally arranged on the lamp panel, only corresponding LED lamp beads are arranged on the lamp panel, the universality of the LED lamp panel is further improved, the requirements of different colors can be met only by welding different lamp beads on the same PCB lamp panel, and the wave soldering is convenient because of only the LED lamp beads, the protection of a patch device is not needed to be additionally considered, the cost of the jig is reduced, and the production cost is greatly reduced. The scheme has the advantages that lightning stroke, surge and static electricity are specially designed, the stability of a power supply is improved, the installation quantity of the power supply is reduced, the production efficiency is improved, and the cost is reduced. The scheme can also meet the application requirements of other types of signal lamps, is convenient to install and implement, and is suitable for comprehensive popularization.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (7)
1. A traffic light power supply comprising:
the power supply module is connected with a feedback control unit, a red light signal output unit, a green light signal output unit, a yellow light signal output unit, a red light signal rectification unit, a green light signal rectification unit and a yellow light signal rectification unit; the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are all connected with a photoelectric conversion module, the photoelectric conversion module is all connected with the feedback control unit, and the red light signal output unit, the green light signal output unit and the yellow light signal output unit are all connected with the feedback control unit.
2. The traffic light power supply of claim 1, wherein diodes are provided between the red light signal rectifying unit, the green light signal rectifying unit, and the yellow light signal rectifying unit and the corresponding photoelectric conversion modules.
3. The traffic signal light power supply of claim 1 wherein the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are connected with a red light input signal, a yellow light input signal and a green light input signal, respectively.
4. The traffic light power supply of claim 1 wherein the red light signal rectifying unit, the green light signal rectifying unit and the yellow light signal rectifying unit are all 100HZ steamed bread waves.
5. The traffic light power supply of claim 1 wherein the photoelectric conversion module isolates the input signal by an optocoupler and converts the isolated input signal to a low voltage detection signal.
6. The control method of the traffic signal power supply is characterized by comprising the following steps:
s1: the input of a red, yellow and green signal lamp is used as power input, and in order to avoid that various signals are electrified simultaneously when wiring errors occur, the red, yellow and green power supplies are rectified, and then diodes for preventing reverse current are added;
s2: the rectified signal is converted into a low-voltage detection signal after being isolated by an optical coupler, and then the low-voltage detection signal is linked with the output current, so that the lighting of the signal lamp is controlled.
7. The control method of the traffic signal power supply is characterized in that in the S2, the low-voltage detection signal is linked with the output current, and the control method comprises the following two methods: firstly, adding a filter capacitor to the pulse signal after the isolation conversion of the optocoupler, converting the pulse signal into a voltage signal, and driving a corresponding MOS tube by the voltage signal to control the feedback resistance of a power chip so as to control the current conduction of signal lamps with different colors; and secondly, detecting the pulse signals after the optical coupler isolation conversion through the singlechip, and controlling the corresponding MOS tube to control the feedback resistor of the power chip to be switched to the corresponding output current when the pulse signals exist continuously, namely indicating that the pulse signals are of the type of signal input, thereby controlling the current conduction of the signal lamps with different colors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310353622.1A CN116347706A (en) | 2023-04-05 | 2023-04-05 | Traffic signal lamp power supply and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310353622.1A CN116347706A (en) | 2023-04-05 | 2023-04-05 | Traffic signal lamp power supply and control method |
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| CN116347706A true CN116347706A (en) | 2023-06-27 |
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