CN109640450B - Intelligent control system for three-primary-color multi-color-temperature LED street lamp - Google Patents
Intelligent control system for three-primary-color multi-color-temperature LED street lamp Download PDFInfo
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- CN109640450B CN109640450B CN201811612071.1A CN201811612071A CN109640450B CN 109640450 B CN109640450 B CN 109640450B CN 201811612071 A CN201811612071 A CN 201811612071A CN 109640450 B CN109640450 B CN 109640450B
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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
- H05B45/37—Converter circuits
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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]
- H05B45/10—Controlling the intensity of the light
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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]
- H05B45/20—Controlling the colour of the light
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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]
- H05B45/50—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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention provides an intelligent control system of a tricolor multi-color temperature LED street lamp, wherein the input end of a surge protection circuit is connected with commercial power, the output end of the surge protection circuit is connected with the input end of a rectification circuit, the output end of the rectification circuit is connected with the input end of a preceding stage power circuit, the output end of the preceding stage power circuit is respectively connected with the input ends of a first voltage stabilizing circuit and a second voltage stabilizing circuit, the first voltage stabilizing circuit outputs 5V direct current to supply power to a main controller, an LED control circuit and the preceding stage power circuit, the output end of the second voltage stabilizing circuit outputs 9V direct current VCC1 to supply power to the LED control circuit, the control end of the LED control circuit is connected with a main control electrical appliance, the control end of the preceding stage power circuit is connected with the main controller, stable working power can be provided for the LED lamp of the tricolor multi-color temperature, and the LED array in the, thereby ensuring that the LED street lamp can operate durably and stably.
Description
Technical Field
The invention relates to the field of illumination, in particular to an intelligent control system for a three-primary-color multi-color-temperature LED street lamp.
Background
With the development of LED technology, LED technology is also widely used for lighting, such as LED street lamps, LED table lamps, etc., because LEDs have the advantages of strong shock resistance, small heat generation, low energy consumption, long life, etc.
The LED lamp is generally based on the three-primary-color principle, the LED array of the red, green and blue three primary colors is controlled to enable the LED lamp to emit light rays with different color temperatures and brightness, the working stability of the LED lamp does not only depend on the LED, but also depends on the drive control circuit of the LED, the existing LED control circuit has poor stability, and in addition, the LED lamp is easy to age when the brightness of the LED lamp is controlled, so that the service life of the LED lamp is shortened.
Therefore, in order to solve the above technical problems, a new solution is continuously proposed.
Disclosure of Invention
In view of this, an object of the present invention is to provide an intelligent control system for a three-primary-color multi-color-temperature LED street lamp, which can provide stable working power for the three-primary-color multi-color-temperature LED lamp, and can ensure that an LED array in the LED lamp does not exceed a brightness critical value to emit light, thereby ensuring that the LED street lamp can operate stably and durably.
The invention provides an intelligent control system of a three-primary-color multi-color-temperature LED street lamp, which comprises a surge protection circuit, a rectifying circuit, a preceding stage power supply circuit, a main controller, a three-primary-color LED lamp, an LED control circuit, a first voltage stabilizing circuit and a second voltage stabilizing circuit, wherein the surge protection circuit is connected with the rectifying circuit;
the input end of the surge protection circuit is connected with a mains supply, the output end of the surge protection circuit is connected with the input end of the rectification circuit, the output end of the rectification circuit is connected with the input end of the preceding stage power supply circuit, the output end of the preceding stage power supply circuit is respectively connected with the input ends of the first voltage stabilizing circuit and the second voltage stabilizing circuit, the first voltage stabilizing circuit outputs 5V direct current to supply power to the main controller, the LED control circuit and the preceding stage power supply circuit, the output end of the second voltage stabilizing circuit outputs 9V direct current VCC1 to supply power to the LED control circuit, the control end of the LED control circuit is connected with a main control electrical appliance, and the control end of the preceding stage power supply circuit.
Further, the three-primary-color LED lamp comprises a red LED array, a yellow LED array and a white LED array, the three LED control circuits are of the same structure, and control the red LED array, the yellow LED array and the white LED array to emit light and brightness respectively;
the LED control circuit comprises a resistor R15, a resistor R16, a digital potentiometer RT2, a triode Q4, a triode Q5, a diode D1, a silicon controlled rectifier SCR1, a resistor R13, a resistor R24, a resistor R25, a resistor R26, an operational amplifier U5, an operational amplifier U6, an operational amplifier U7 and a capacitor C4;
one end of the resistor R15 is connected with a 5V direct current power supply, the other end of the resistor R15 is connected with the collector of the triode Q4, the emitter of the triode Q4 is connected with the control electrode of the silicon controlled SCR1, the base electrode of the triode Q4 is connected with the resistor R16, the other end of the resistor R16 is connected with the main controller as the first control end CON1 of the LED control circuit, the anode of the SCR1 is connected with the output end of a digital potentiometer RT2, the input end of the digital potentiometer RT2 is connected with the output end of an operational amplifier U5, the control end of the digital potentiometer RT2 is connected with a master controller, the negative electrode of the controlled silicon SCR1 is connected with the input end of the LED array of the tricolor LED and the like, the positive electrode of the controlled silicon SCR1 is also connected with the collector of a triode Q5, the emitter of the triode Q5 is grounded, the base of the triode Q5 is connected with the negative electrode of a diode D1 through a resistor R13, and the positive electrode of a diode D1 is connected with a master controller as a second control end CON2 of the LED control circuit;
the in-phase end of the operational amplifier U5 is connected to a power supply VCC1 through a resistor R24, the in-phase end of the operational amplifier U7 is connected to a common connection point between a digital potentiometer RT2 and a silicon controlled rectifier SCR1, the output end of the operational amplifier U7 is connected to the inverting end of the operational amplifier U6 through a resistor R25, the inverting end of the operational amplifier U7 is directly connected to the output end of the operational amplifier U7, the inverting end of the operational amplifier U6 is connected to the output end of the operational amplifier U6 through a resistor R26 and a capacitor C4 in parallel, the output end of the operational amplifier U6 is connected to the inverting end of the operational amplifier U5, and the in-phase end of the operational amplifier U6 is connected to the output end of the operational amplifier U5.
Further, the preceding stage power supply circuit comprises a resistor R1, an operational amplifier U1, a resistor R3, a triode Q1, a resistor R5, a controllable precision voltage-stabilizing source U2, a resistor R10, a capacitor C1, a digital potentiometer RT1, a diode D3, a capacitor C2 and a voltage-stabilizing tube DW 1;
one end of the resistor R1 is used as an input end of a preceding stage power supply circuit and is connected with an output end of the rectifying circuit, the other end of the resistor R1 is connected with a non-inverting end of the operational amplifier U1, an inverting end of the operational amplifier U1 is directly connected with an output end of the operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with a collector of a triode Q1 through a resistor R3, an emitter of the triode Q1 is connected with an anode of a diode D3, a cathode of the diode D3 is grounded through a capacitor C2, a cathode of the diode D3 is connected with a cathode of a voltage regulator DW1, an anode of the voltage regulator DW1 is grounded, a common connection point between the triode Q1 and a voltage regulator DW 9 is used as an output end of the preceding stage power supply circuit, a collector of the triode Q1 is connected with a base of a triode Q1 through a resistor R5, a base of the triode Q1 is connected with a cathode of a controllable precision voltage regulator U2, an anode of the controllable precision voltage regulator U2, the output end of the digital potentiometer RT1 is grounded through a resistor R10, a common connection point between the digital potentiometer RT1 and the resistor R10 is connected with the reference pole of a controllable precision voltage-stabilizing source U2, and the emitter of the triode Q1 is connected with the reference pole of the controllable precision voltage-stabilizing source U2 through a capacitor C1.
Further, the preceding-stage power supply circuit further comprises a standby circuit, wherein the standby circuit comprises a resistor R2, a resistor R4, a resistor R6, a resistor R8, a resistor R7, a resistor R9, a resistor R11, a resistor R14, a resistor R17, a resistor R18, a resistor R19, a controllable precision voltage-stabilizing source U3, an operational amplifier U4, an optocoupler G1, a diode D2, a resistor R20, a triode Q6, a triode Q7, a resistor R21, a resistor R22, a normally-closed relay, a standby lithium battery, a triode Q3 and a MOS transistor Q2;
the resistance values of the resistor R7 and the resistor R9 are equal, and the resistance value of the resistor R12 is smaller than one half of the resistance value of the resistor R7;
one end of the resistor R2 is connected with the negative electrode of the diode D3, the other end of the resistor R2 is grounded through a resistor R4, a common connection point between the resistor R2 and the resistor R4 is connected with the inverting terminal of the operational amplifier U4 through a resistor R7, one end of the resistor R18 is connected with the inverting terminal of the operational amplifier U4, the other end of the resistor R18 is connected with the spare lithium battery Vbat, the negative electrode of the controllable precise voltage-stabilizing source U3 is connected with the inverting terminal of the operational amplifier U4, the positive electrode of the controllable precise voltage-stabilizing source U3 is grounded, the reference electrode of the controllable precise voltage-stabilizing source U3 is connected with the spare lithium battery Vbat through a resistor R19, the output end of the operational amplifier U4 is connected with the positive electrode of the light-emitting diode of the optical coupler G1 through a resistor R14, the negative electrode of the light-emitting diode of the optical coupler G1 is grounded, the collector of the optical coupler G1 is connected with a 5V power supply, the emitter of the phototransistor 1 is grounded, the emitter of the optical coupler 1 is connected, the emitter of the transistor Q3 is grounded through a resistor R12;
one end of a resistor R6 is connected to the collector of a triode Q1, the other end of a resistor R6 is connected with the drain of a MOS transistor Q2, the source of the MOS transistor Q2 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1 through a resistor R9, one end of the resistor R7 is connected to the gate of a MOS transistor Q2, the other end of the resistor R7 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1, the gate of the MOS transistor Q2 is grounded through a resistor R8, the gate of the MOS transistor Q2 is grounded through a capacitor C3, the common connection point A between the gate of the MOS transistor and the resistor R8 is connected with the collector of the triode Q3, wherein the MOS transistor Q2 is a PMOS transistor;
the anode of the diode D2 is connected to the emitter of the phototriode of the optocoupler G1, the cathode of the diode D2 is connected to the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is connected to the detection terminal CON3 of the master controller;
the base electrode of the triode Q7 is connected to a common connection point between the resistor R2 and the resistor R4 through the resistor R22, the collector electrode of the triode Q7 is connected with 5V direct current, the emitter electrode of the triode Q7 is connected with the coil J1 of the normally closed relay in series through the resistor R21 and then grounded, one end of the normally closed switch J-K1 of the normally closed relay is connected with the standby lithium battery Vbat, and the other end of the normally closed switch J-K1 of the normally closed relay is connected with the input end of.
Further, the master controller is a single chip microcomputer.
Further, the rectifying circuit is a full-bridge rectifying circuit composed of diodes.
The invention has the beneficial effects that: the LED street lamp can provide stable working electricity for the LED lamp with three primary colors and multiple color temperatures, and can ensure that an LED array in the LED lamp does not exceed a brightness critical value to emit light, thereby ensuring that the LED street lamp can run durably and stably.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a front stage power supply circuit of the present invention.
FIG. 3 is a schematic diagram of an LED control circuit of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the invention provides an intelligent control system of a three-primary-color multi-color-temperature LED street lamp, which comprises a surge protection circuit, a rectifying circuit, a preceding stage power supply circuit, a main controller, a three-primary-color LED lamp, an LED control circuit, a first voltage stabilizing circuit and a second voltage stabilizing circuit, wherein the surge protection circuit is connected with the rectifying circuit;
the input end of the surge protection circuit is connected with a mains supply, the output end of the surge protection circuit is connected with the input end of the rectification circuit, the output end of the rectification circuit is connected with the input end of a preceding stage power circuit, the output end of the preceding stage power circuit is respectively connected with the input ends of a first voltage stabilizing circuit and a second voltage stabilizing circuit, the first voltage stabilizing circuit outputs 5V direct current to supply power to the main controller, the LED control circuit and the preceding stage power circuit, the output end of the second voltage stabilizing circuit outputs 9V direct current VCC1 to supply power to the LED control circuit, the control end of the LED control circuit is connected with a main control appliance, the control end of the preceding stage power circuit is connected with the main controller, wherein the main controller adopts the existing single chip microcomputer, such as an 89S51 single chip microcomputer, an AVR single chip microcomputer and the like, the surge protection circuit adopts the existing circuit, and by the structure, and can ensure that the LED array in the LED lamp can not exceed the luminance critical value and give out light to ensure that the LED street lamp can be lastingly, steady operation, wherein, first voltage stabilizing circuit and second voltage stabilizing circuit adopt current voltage stabilizing circuit, for example: the first voltage stabilizing circuit adopts LM7805 and LM2596 voltage stabilizing circuits, and the second voltage stabilizing circuit adopts an LM7809 voltage stabilizing circuit.
In this embodiment, the three-primary-color LED lamp includes a red LED array, a yellow LED array, and a white LED array, the three LED control circuits have three and the same structure, and the three LED control circuits respectively control the red LED array, the yellow LED array, and the white LED array to emit light and to have brightness; the three basic colors in the invention refer to three basic colors of red, yellow and white, but not three primary colors of red, green and white in the traditional sense, and the three basic colors can ensure that the light ray reduction degree of the street lamp is higher, thereby being beneficial to illumination;
the LED control circuit comprises a resistor R15, a resistor R16, a digital potentiometer RT2, a triode Q4, a triode Q5, a diode D1, a silicon controlled rectifier SCR1, a resistor R13, a resistor R24, a resistor R25, a resistor R26, an operational amplifier U5, an operational amplifier U6, an operational amplifier U7 and a capacitor C4;
one end of the resistor R15 is connected with a 5V direct current power supply, the other end of the resistor R15 is connected with the collector of the triode Q4, the emitter of the triode Q4 is connected with the control electrode of the silicon controlled SCR1, the base electrode of the triode Q4 is connected with the resistor R16, the other end of the resistor R16 is connected with the main controller as the first control end CON1 of the LED control circuit, the anode of the SCR1 is connected with the output end of a digital potentiometer RT2, the input end of the digital potentiometer RT2 is connected with the output end of an operational amplifier U5, the control end of the digital potentiometer RT2 is connected with a master controller, the negative electrode of the controlled silicon SCR1 is connected with the input end of the LED array of the tricolor LED and the like, the positive electrode of the controlled silicon SCR1 is also connected with the collector of a triode Q5, the emitter of the triode Q5 is grounded, the base of the triode Q5 is connected with the negative electrode of a diode D1 through a resistor R13, and the positive electrode of a diode D1 is connected with a master controller as a second control end CON2 of the LED control circuit;
the in-phase end of the operational amplifier U5 is connected to a power supply VCC1 through a resistor R24, the in-phase end of the operational amplifier U7 is connected to a common connection point between a digital potentiometer RT2 and a silicon controlled rectifier SCR1, the output end of the operational amplifier U7 is connected to the inverting end of the operational amplifier U6 through a resistor R25, the inverting end of the operational amplifier U7 is directly connected to the output end of the operational amplifier U7, the inverting end of the operational amplifier U6 is connected in parallel to the output end of the operational amplifier U6 through a resistor R26 and a capacitor C4, the output end of the operational amplifier U6 is connected to the inverting end of the operational amplifier U5, and the in-phase end of the operational amplifier U6 is connected to the output end of the operational amplifier U5; wherein, the constant current source circuit is constituteed to fortune amplifier U5, digital potentiometer RT2, fortune amplifier U6 and fortune amplifier U7, through the size of control RT2 to change the size of the supply current of output to the LED array, thereby change illumination brightness, fortune is put U7 and fortune and is put U6 and be used for carrying out feedback control, thereby make the output current of whole constant current source more reliable and more stable.
Through the structure, when the LED street lamp is required to emit white light, three LED control circuits work, the master controller controls the conduction of the triode Q4, the triode Q5 is cut off, the controlled silicon is conducted at the moment, three LED arrays work in a light emitting mode, the whole LED street lamp outputs the white light, if light with other color temperatures is required, the color temperature is changed by controlling the work of different LED arrays, the resistance value is changed by controlling the RT2 through the master controller, the driving current of the LED arrays is changed, the brightness of the LED street lamp is changed, the master controller can also calculate the current value flowing to the LED arrays according to the value of the RT2 and the internal impedance of the controlled silicon SCR1, if the brightness value input by a user is too high, the current flowing to the LED arrays is larger, the aging of the LEDs is accelerated, at the moment, the master controller can be conducted through controlling the triode Q5, a power supply loop is turned off, and then a user can be inquired through a The LED protection circuit has the advantages that the brightness value input in the front works, so that the LED array is well protected, and the silicon controlled rectifier is used as a switch, so that the LED protection circuit has the characteristics of high reflection sensitivity, high stability and no inrush current in the switching-on and switching-off process, and further can further protect the LED array.
In this embodiment, the pre-stage power supply circuit includes a resistor R1, an operational amplifier U1, a resistor R3, a triode Q1, a resistor R5, a controllable precision voltage regulator U2, a resistor R10, a capacitor C1, a digital potentiometer RT1, a diode D3, a capacitor C2, and a voltage regulator DW 1;
one end of the resistor R1 is used as an input end of a preceding stage power supply circuit and is connected with an output end of the rectifying circuit, the other end of the resistor R1 is connected with a non-inverting end of the operational amplifier U1, an inverting end of the operational amplifier U1 is directly connected with an output end of the operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with a collector of a triode Q1 through a resistor R3, an emitter of the triode Q1 is connected with an anode of a diode D3, a cathode of the diode D3 is grounded through a capacitor C2, a cathode of the diode D3 is connected with a cathode of a voltage regulator DW1, an anode of the voltage regulator DW1 is grounded, a common connection point between the triode Q1 and a voltage regulator DW 9 is used as an output end of the preceding stage power supply circuit, a collector of the triode Q1 is connected with a base of a triode Q1 through a resistor R5, a base of the triode Q1 is connected with a cathode of a controllable precision voltage regulator U2, an anode of the controllable precision voltage regulator U2, the output end of the digital potentiometer RT1 is grounded through a resistor R10, a common connection point between the digital potentiometer RT1 and the resistor R10 is connected with the reference pole of a controllable precision voltage-stabilizing source U2, and the emitter of the triode Q1 is connected with the reference pole of the controllable precision voltage-stabilizing source U2 through a capacitor C1.
Specifically, the preceding-stage power supply circuit further comprises a standby circuit, wherein the standby circuit comprises a resistor R2, a resistor R4, a resistor R6, a resistor R8, a resistor R7, a resistor R9, a resistor R11, a resistor R14, a resistor R17, a resistor R18, a resistor R19, a controllable precision voltage-stabilizing source U3, an operational amplifier U4, an optocoupler G1, a diode D2, a resistor R20, a triode Q6, a triode Q7, a resistor R21, a resistor R22, a normally-closed relay, a standby lithium battery, a triode Q3 and a MOS transistor Q2;
the resistance values of the resistor R7 and the resistor R9 are equal, and the resistance value of the resistor R12 is smaller than one half of the resistance value of the resistor R7;
one end of the resistor R2 is connected with the negative electrode of the diode D3, the other end of the resistor R2 is grounded through a resistor R4, a common connection point between the resistor R2 and the resistor R4 is connected with the inverting terminal of the operational amplifier U4 through a resistor R7, one end of the resistor R18 is connected with the inverting terminal of the operational amplifier U4, the other end of the resistor R18 is connected with the spare lithium battery Vbat, the negative electrode of the controllable precise voltage-stabilizing source U3 is connected with the inverting terminal of the operational amplifier U4, the positive electrode of the controllable precise voltage-stabilizing source U3 is grounded, the reference electrode of the controllable precise voltage-stabilizing source U3 is connected with the spare lithium battery Vbat through a resistor R19, the output end of the operational amplifier U4 is connected with the positive electrode of the light-emitting diode of the optical coupler G1 through a resistor R14, the negative electrode of the light-emitting diode of the optical coupler G1 is grounded, the collector of the optical coupler G1 is connected with a 5V power supply, the emitter of the phototransistor 1 is grounded, the emitter of the optical coupler 1 is connected, the emitter of the transistor Q3 is grounded through a resistor R12;
one end of a resistor R6 is connected to the collector of a triode Q1, the other end of a resistor R6 is connected with the drain of a MOS transistor Q2, the source of the MOS transistor Q2 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1 through a resistor R9, one end of the resistor R7 is connected to the gate of a MOS transistor Q2, the other end of the resistor R7 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1, the gate of the MOS transistor Q2 is grounded through a resistor R8, the gate of the MOS transistor Q2 is grounded through a capacitor C3, the common connection point A between the gate of the MOS transistor and the resistor R8 is connected with the collector of the triode Q3, wherein the MOS transistor Q2 is a PMOS transistor;
the anode of the diode D2 is connected to the emitter of the phototriode of the optocoupler G1, the cathode of the diode D2 is connected to the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is connected to the detection terminal CON3 of the master controller;
the base electrode of the triode Q7 is connected to a common connection point between the resistor R2 and the resistor R4 through the resistor R22, the collector electrode of the triode Q7 is connected with 5V direct current, the emitter electrode of the triode Q7 is connected with the coil J1 of the normally closed relay in series through the resistor R21 and then grounded, one end of the normally closed switch J-K1 of the normally closed relay is connected with the standby lithium battery Vbat, and the other end of the normally closed switch J-K1 of the normally closed relay is connected with the input end of.
With the power supply with the structure, due to the effect of the voltage follower formed by the operational amplifier U1, on one hand, the voltage follower has the effect of stabilizing voltage, on the other hand, the voltage follower can play the effect of isolating a back-end circuit, and the back-end circuit is well protected, and because the triode Q1 plays the role of pre-stage voltage stabilization and is matched with the first voltage stabilizing circuit and the second voltage stabilizing circuit, stable working power can be provided for the whole system, on the other hand, when the triode Q1 stably runs, the resistance of the resistor R9 and the resistor R7 is equal, so that the MOS tube Q2 is cut off, the resistor R2 and the resistor R6 are used for sampling the output of the triode Q1, the reverse comparator formed by the operational amplifier U4 is used for comparing the sampling value with the reference voltage provided by the controllable precise voltage stabilizing source U3, when the sampling value is smaller than the reference voltage value, the operational amplifier U4 outputs high level, and the optical coupler G, the triode Q3 is conducted, so that the triode Q3 is conducted, so that the grid voltage of the MOS tube Q2 is pulled down, so that the MOS tube Q2 is conducted, so that the standby loop consisting of the resistor R6, the drain electrode of the MOS tube Q2, the source electrode and the resistor R9 is used for directly supplying power, in addition, when the optical coupler G1 is conducted, the triode Q6 is conducted, so that the potential of the terminal CON3 of the master controller is pulled down, the master controller learns that the voltage stabilizing circuit consisting of the triode Q1 breaks down according to the low level and gives an alarm, when the voltage stabilizing circuit of the triode Q1 has continuous output, the triode Q7 is conducted, the normally closed relay enables the normally closed switch J-K1 to be disconnected due to power supply, if the triode Q1 breaks down, the triode Q7 is cut off, the normally closed switch J-K1 of the voltage stabilizing circuit is closed, the standby lithium battery is used for supplying power to the first Vbat, and the, no operational power is supplied to the LED array; and the current of the standby lithium battery is prevented from flowing backwards to the resistor R2 to cause misjudgment, and the diode D4 is arranged at the rear end of the common connection point of the voltage-stabilizing tube DW1 and the diode D1.
In this embodiment, the rectifier circuit is a full-bridge rectifier circuit composed of diodes, and has a simple structure and good stability.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. The utility model provides a many colour temperatures of three primary colors LED street lamp intelligence control system which characterized in that: the LED lamp control circuit comprises a surge protection circuit, a rectifying circuit, a preceding stage power circuit, a main controller, a three-primary-color LED lamp, an LED control circuit, a first voltage stabilizing circuit and a second voltage stabilizing circuit;
the input end of the surge protection circuit is connected with a mains supply, the output end of the surge protection circuit is connected with the input end of the rectification circuit, the output end of the rectification circuit is connected with the input end of the preceding power supply circuit, the output end of the preceding power supply circuit is respectively connected with the input ends of the first voltage stabilizing circuit and the second voltage stabilizing circuit, the first voltage stabilizing circuit outputs 5V direct current to supply power to the master controller, the LED control circuit and the preceding power supply circuit, the output end of the second voltage stabilizing circuit outputs 9V direct current VCC1 to supply power to the LED control circuit, the control end of the LED control circuit is connected with a master control electrical appliance, and the control end of the preceding power supply circuit is connected with the;
the pre-stage power supply circuit comprises a resistor R1, an operational amplifier U1, a resistor R3, a triode Q1, a resistor R5, a controllable precision voltage-stabilizing source U2, a resistor R10, a capacitor C1, a digital potentiometer RT1, a diode D3, a capacitor C2 and a voltage-stabilizing tube DW 1;
one end of the resistor R1 is used as an input end of a preceding stage power supply circuit and is connected with an output end of the rectifying circuit, the other end of the resistor R1 is connected with a non-inverting end of the operational amplifier U1, an inverting end of the operational amplifier U1 is directly connected with an output end of the operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with a collector of a triode Q1 through a resistor R3, an emitter of the triode Q1 is connected with an anode of a diode D3, a cathode of the diode D3 is grounded through a capacitor C2, a cathode of the diode D3 is connected with a cathode of a voltage regulator DW1, an anode of the voltage regulator DW1 is grounded, a common connection point between the triode Q1 and a voltage regulator DW 9 is used as an output end of the preceding stage power supply circuit, a collector of the triode Q1 is connected with a base of a triode Q1 through a resistor R5, a base of the triode Q1 is connected with a cathode of a controllable precision voltage regulator U2, an anode of the controllable precision voltage regulator U2, the output end of the digital potentiometer RT1 is grounded through a resistor R10, a common connection point between the digital potentiometer RT1 and the resistor R10 is connected with a reference electrode of a controllable precision voltage-stabilizing source U2, and an emitter of a triode Q1 is connected with the reference electrode of the controllable precision voltage-stabilizing source U2 through a capacitor C1;
the pre-stage power supply circuit further comprises a standby circuit, wherein the standby circuit comprises a resistor R2, a resistor R4, a resistor R6, a resistor R8, a resistor R7, a resistor R9, a resistor R11, a resistor R14, a resistor R17, a resistor R18, a resistor R19, a controllable precision voltage-stabilizing source U3, an operational amplifier U4, an optocoupler G1, a diode D2, a resistor R20, a triode Q6, a triode Q7, a resistor R21, a resistor R22, a normally closed relay, a standby lithium battery, a triode Q3 and a MOS transistor Q2;
the resistance values of the resistor R7 and the resistor R9 are equal, and the resistance value of the resistor R12 is smaller than one half of the resistance value of the resistor R7;
one end of the resistor R2 is connected with the negative electrode of the diode D3, the other end of the resistor R2 is grounded through a resistor R4, a common connection point between the resistor R2 and the resistor R4 is connected with the inverting terminal of the operational amplifier U4 through a resistor R7, one end of the resistor R18 is connected with the inverting terminal of the operational amplifier U4, the other end of the resistor R18 is connected with the spare lithium battery Vbat, the negative electrode of the controllable precise voltage-stabilizing source U3 is connected with the inverting terminal of the operational amplifier U4, the positive electrode of the controllable precise voltage-stabilizing source U3 is grounded, the reference electrode of the controllable precise voltage-stabilizing source U3 is connected with the spare lithium battery Vbat through a resistor R19, the output end of the operational amplifier U4 is connected with the positive electrode of the light-emitting diode of the optical coupler G1 through a resistor R14, the negative electrode of the light-emitting diode of the optical coupler G1 is grounded, the collector of the optical coupler G1 is connected with a 5V power supply, the emitter of the phototransistor 1 is grounded, the emitter of the optical coupler 1 is connected, the emitter of the transistor Q3 is grounded through a resistor R12;
one end of a resistor R6 is connected to the collector of a triode Q1, the other end of a resistor R6 is connected with the drain of a MOS transistor Q2, the source of the MOS transistor Q2 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1 through a resistor R9, one end of the resistor R7 is connected to the gate of a MOS transistor Q2, the other end of the resistor R7 is connected to the common connection point between a capacitor C2 and the emitter of the triode Q1, the gate of the MOS transistor Q2 is grounded through a resistor R8, the gate of the MOS transistor Q2 is grounded through a capacitor C3, the common connection point A between the gate of the MOS transistor and the resistor R8 is connected with the collector of the triode Q3, wherein the MOS transistor Q2 is a PMOS transistor;
the anode of the diode D2 is connected to the emitter of the phototriode of the optocoupler G1, the cathode of the diode D2 is connected to the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is connected to the detection terminal CON3 of the master controller;
the base electrode of the triode Q7 is connected to a common connection point between the resistor R2 and the resistor R4 through the resistor R22, the collector electrode of the triode Q7 is connected with 5V direct current, the emitter electrode of the triode Q7 is connected with the coil J1 of the normally closed relay in series through the resistor R21 and then grounded, one end of the normally closed switch J-K1 of the normally closed relay is connected with the standby lithium battery Vbat, and the other end of the normally closed switch J-K1 of the normally closed relay is connected with the input end of.
2. The intelligent control system for the tricolor multi-color temperature LED street lamp according to claim 1, characterized in that: the three-primary-color LED lamp comprises a red LED array, a yellow LED array and a white LED array, the number of the LED control circuits is three, the structures of the LED control circuits are the same, and the three LED control circuits respectively control the red LED array, the yellow LED array and the white LED array to emit light and brightness;
the LED control circuit comprises a resistor R15, a resistor R16, a digital potentiometer RT2, a triode Q4, a triode Q5, a diode D1, a silicon controlled rectifier SCR1, a resistor R13, a resistor R24, a resistor R25, a resistor R26, an operational amplifier U5, an operational amplifier U6, an operational amplifier U7 and a capacitor C4;
one end of the resistor R15 is connected with a 5V direct current power supply, the other end of the resistor R15 is connected with the collector of the triode Q4, the emitter of the triode Q4 is connected with the control electrode of the silicon controlled SCR1, the base electrode of the triode Q4 is connected with the resistor R16, the other end of the resistor R16 is connected with the main controller as the first control end CON1 of the LED control circuit, the anode of the SCR1 is connected with the output end of a digital potentiometer RT2, the input end of the digital potentiometer RT2 is connected with the output end of an operational amplifier U5, the control end of the digital potentiometer RT2 is connected with a master controller, the negative electrode of the controlled silicon SCR1 is connected with the input end of the LED array of the tricolor LED and the like, the positive electrode of the controlled silicon SCR1 is also connected with the collector of a triode Q5, the emitter of the triode Q5 is grounded, the base of the triode Q5 is connected with the negative electrode of a diode D1 through a resistor R13, and the positive electrode of a diode D1 is connected with a master controller as a second control end CON2 of the LED control circuit;
the in-phase end of the operational amplifier U5 is connected to a power supply VCC1 through a resistor R24, the in-phase end of the operational amplifier U7 is connected to a common connection point between a digital potentiometer RT2 and a silicon controlled rectifier SCR1, the output end of the operational amplifier U7 is connected to the inverting end of the operational amplifier U6 through a resistor R25, the inverting end of the operational amplifier U7 is directly connected to the output end of the operational amplifier U7, the inverting end of the operational amplifier U6 is connected to the output end of the operational amplifier U6 through a resistor R26 and a capacitor C4 in parallel, the output end of the operational amplifier U6 is connected to the inverting end of the operational amplifier U5, and the in-phase end of the operational amplifier U6 is connected to the output end of the operational amplifier U5.
3. The intelligent control system for the tricolor multi-color temperature LED street lamp according to claim 1, characterized in that: the main controller is a singlechip.
4. The intelligent control system for the tricolor multi-color temperature LED street lamp according to claim 1, characterized in that: the rectifying circuit is a full-bridge rectifying circuit consisting of diodes.
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| CN206207126U (en) * | 2016-08-17 | 2017-05-31 | 深圳市蚂蚁雄兵物联技术有限公司 | A kind of car-mounted device of kinetic energy bluetooth light bar |
| CN106376123A (en) * | 2016-08-28 | 2017-02-01 | 浙江三森科技股份有限公司 | Controllable intelligent driving power with multiple color temperatures |
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