LED double-color-temperature tunnel lamp

Abstract

The utility model relates to an LED double-color-temperature tunnel lamp which comprises a single-chip microcomputer, a communication unit, two constant-current driving units, a warm-color light-emitting unit, a cold-color light-emitting unit and a constant-voltage power supply, the signal end of the single-chip microcomputer is connected with the communication unit, and the signal end of the single-chip microcomputer is further respectively connected with the signal ends of the two constant-current driving units. The communication unit is also connected with an external control gateway; the input ends of the two constant-current driving units are electrically connected with the constant-voltage power supply, and the output ends of the two constant-current driving units are electrically connected with the two warm-color light-emitting units and the two cold-color light-emitting units respectively. Compared with the prior art, according to the utility model, the warm-color light-emitting unit and the cold-color light-emitting unit can be efficiently controlled to emit light and adjust light according to environmental characteristics, the energy consumption can be effectively reduced, the lighting effect can be improved, and traffic safety accidents can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of LEDs, and in particular to an LED dual-color temperature tunnel lamp. Background Art

[0002] With the rapid development of the domestic economy, the construction of transportation infrastructure covering the whole country is in full swing. At present, the total length of domestic highway construction has exceeded 5 million kilometers, and there is a great demand for the construction of highway and tunnel lighting control. In the development history of lighting technology, LED lighting is unique. LED power drive, wafer manufacturing and packaging technology are very mature, making LED lamps the mainstream of the lighting market. At present, the lighting control in tunnel lighting design is mainly based on loop dimming control. Loop dimming is to control the lamps in groups, and each group requires a separate control loop. Loop dimming has a certain effect on energy saving, but it is not optimal. There is still a lot of room for improvement in energy saving. In addition, the LED in the existing technology has poor lighting effect in rainy and foggy weather, which is easy to cause traffic safety accidents, so it is necessary to solve this problem. Utility Model Content

[0003] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, one purpose of the utility model is to provide an LED dual color temperature tunnel light that can emit light and dim light according to environmental characteristics, effectively reduce energy consumption, improve lighting effects, and reduce the occurrence of traffic safety accidents.

[0004] The utility model solves the above technical problems with the following technical solutions: an LED dual-color temperature tunnel light, comprising a single-chip microcomputer, a communication unit, two constant current drive units, a warm-color light-emitting unit, a cold-color light-emitting unit and a constant voltage power supply, wherein the signal end of the single-chip microcomputer is connected to the communication unit, and the signal end of the single-chip microcomputer is also respectively connected to the signal ends of the two constant current drive units, and the communication unit is also connected to an external control gateway; the input ends of the two constant current drive units are both electrically connected to the constant voltage power supply, and the output ends of the two constant current drive units are respectively electrically connected to the two warm-color light-emitting units and the cold-color light-emitting units.

[0005] The beneficial effects of the utility model are: through the coordinated operation of the single-chip microcomputer, the communication unit, the two constant current drive units and the constant voltage power supply, the warm-color light-emitting unit and the cold-color light-emitting unit can be efficiently controlled to emit light and dim the light according to the environmental characteristics, which can effectively reduce energy consumption, improve lighting effects, and reduce the occurrence of traffic safety accidents.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Further, the constant current driving unit includes resistors R1-R5, a driving chip U1, capacitors C1-C3, an inductor L1, a MOS tube Q1 and a diode D1, the third pin of the driving chip U1 is connected to the output end of the single chip microcomputer; the fifth pin of the driving chip U1 is grounded via the capacitor C2; the second pin of the driving chip U1 is grounded; the sixth pin of the driving chip U1 is grounded via the resistor R4; the capacitor C3 is connected in parallel with the resistor R4; the fourth pin of the driving chip U1 is grounded via the capacitor C1; the fourth pin of the driving chip U1 is connected to the constant voltage power supply via the resistor R1; the driving chip The first pin of the chip U1 is connected to the gate of the MOS tube Q1 via the resistor R3, the gate of the MOS tube Q1 is grounded via the resistor R5, the source of the MOS tube Q1 is connected to the sixth pin of the driving chip U1, the drain of the MOS tube Q1 is connected to the cathode of the LED3 via the inductor L1, the drain of the MOS tube Q1 is connected to the anode of the diode D1; the cathode of the diode D1 is connected to the anode of the LED1, the anode of the LED1 is also connected to the constant voltage power supply, the anode of the LED2 is connected to the cathode of the LED1, and the cathode of the LED2 is connected to the anode of the LED3.

[0008] The beneficial effects of adopting the above further solution are: the circuit principle of the constant current driving unit is simple, the control efficiency is high, and the constant current control of LED1, LED2 and LED3 can be achieved.

[0009] Furthermore, it also includes a power management unit, which is electrically connected to the constant voltage power supply and is also electrically connected to the single chip computer.

[0010] The beneficial effect of adopting the above further solution is: using the power management unit to convert the 36V output of the constant voltage power supply into 3.3V, providing stable 3.3V power for the microcontroller, and ensuring the stable operation of the microcontroller.

[0011] Further, the power management unit includes resistors R6-R7, resistor R9, resistor R11, varistor R8, varistor R10, varistor R12, fuse F1, capacitors C4-C6, capacitor C8, capacitors C10-C11, diode D2, electrolytic capacitor C7, electrolytic capacitor C9, inductor L2 and power management chip U2; one end of the varistor R8 is connected to the constant voltage power supply, and the other end of the varistor R8 is grounded; one end of the varistor R12 is connected to the varistor R8, and the other end is grounded through the capacitor C11; one end of the varistor R10 is connected to the constant voltage power supply, and the other end is grounded through the capacitor C11, and the capacitor C10 is connected in parallel with the varistor R10;

[0012] One end of the fuse F1 is connected to the constant voltage power supply, and the other end is connected to the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the second pin of the power management chip U2. One end of the electrolytic capacitor C9 is connected to the negative electrode of the diode D2, and the other end is grounded via the capacitor C11. The first pin of the power management chip U2 is grounded via the capacitor C11, and the first pin of the power management chip U2 is also connected to its ninth pin. The fourth pin of the power management chip U2 is grounded via the resistor R9 and the capacitor C11. The third pin of the power management chip U2 is connected to its second pin. The fifth pin of the power management chip U2 is grounded via the resistor R11. 1 is grounded, the seventh pin of the power management chip U2 is connected to the eighth pin of the power management chip U2 via the capacitor C5; the eighth pin of the power management chip U2 is connected to one end of the resistor R6 via the inductor L2, and the other end of the resistor R6 is grounded via the resistor R11; one end of the resistor R7 is connected to one end of the inductor L2, and the other end of the resistor R7 is connected to the other end of the inductor L2 via the capacitor C4; one end of the capacitor C8 is connected to the resistor R7, and the other end is connected to the fifth pin of the power management chip U2; one end of the electrolytic capacitor C7 is connected to the inductor L2, and the other end is grounded; the capacitor C6 is connected in parallel with the electrolytic capacitor C7.

[0013] Furthermore, the power management unit also includes an electrolytic capacitor C12, capacitors C13-C15, a transient suppression diode TVS1 and a voltage regulator chip U3, the capacitor C14 is connected in parallel with the capacitor C6, and the capacitor C15 is connected in parallel with the capacitor C14; the third pin of the voltage regulator chip U3 is connected to the capacitor C15, the first pin of the voltage regulator chip U3 is grounded, the second pin of the voltage regulator chip U3 is connected to its fourth pin, the fourth pin of the voltage regulator chip U3 is grounded via the electrolytic capacitor C12, and the capacitor C13 is connected in parallel with the electrolytic capacitor C12; the transient suppression diode TVS1 is connected in parallel with the capacitor C13.

[0014] The beneficial effects of adopting the above further scheme are: the varistor R8, the varistor R10 and the varistor R12 form a primary surge protection circuit, the slow-blow fuse F1 serves as an overcurrent protection device to form a second-level protection circuit, and the diode D2 serves as an anti-reverse connection protection device; the power management unit uses a combination of DC-DC and LDO to provide 3.3V power for the microcontroller, and the ripple of the 3.3V power is significantly reduced, ensuring the stable operation of the microcontroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a module block diagram of an LED dual-color temperature tunnel light of the utility model;

[0016] Figure 2This is a circuit schematic diagram of the constant current drive unit of the utility model;

[0017] Figure 3 This is a first circuit schematic diagram of the communication unit of the utility model;

[0018] Figure 4 This is a second circuit schematic diagram of the communication unit of the utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Single chip microcomputer, 2. Communication unit, 3. Constant current driving unit, 4. Warm color light emitting unit, 5. Cold color light emitting unit, 6. Constant voltage power supply, 7. Control gateway, 8. Power management unit. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1 As shown, an LED dual-color temperature tunnel light includes a single-chip microcomputer 1, a communication unit 2, two constant current drive units 3, a warm-color light-emitting unit 4, a cold-color light-emitting unit 5 and a constant voltage power supply 6. The signal end of the single-chip microcomputer 1 is connected to the communication unit 2, and the signal end of the single-chip microcomputer 1 is also respectively connected to the signal ends of the two constant current drive units 3, and the communication unit 2 is also connected to an external control gateway 7; the input ends of the two constant current drive units 3 are both electrically connected to the constant voltage power supply 6, and the output ends of the two constant current drive units 3 are respectively electrically connected to the two warm-color light-emitting units 4 and the cold-color light-emitting unit 5.

[0023] When this embodiment is applied specifically, the control gateway 7 is connected to the cloud service platform via Ethernet. When the tunnel light needs to be controlled, the cloud service platform sends a control instruction to the control gateway 7, which then sends it to the set tunnel light. The communication unit 2 transmits the control instruction sent by the control gateway 7 to the single-chip microcomputer 1, which processes the control instruction and generates two PWM signals that are transmitted to the two constant current drive units 3 respectively. The two constant current drive units 3 respectively drive the warm-color light-emitting unit 4 and the cold-color light-emitting unit 5 to start, stop or dim.

[0024] This embodiment coordinates the operation of the single-chip microcomputer 1, the communication unit 2, the two constant current drive units 3 and the constant voltage power supply 6, and can efficiently control the warm-color light-emitting unit 4 and the cold-color light-emitting unit 5 to emit light and dim the light according to the environmental characteristics, which can effectively reduce energy consumption, improve lighting effects, and reduce the occurrence of traffic safety accidents.

[0025] In the above embodiment, Figure 2As shown, the constant current driving unit 3 includes resistors R1-R5, a driving chip U1, capacitors C1-C3, an inductor L1, a MOS tube Q1 and a diode D1. The third pin of the driving chip U1 is connected to the output end of the single chip computer 1; the fifth pin of the driving chip U1 is grounded via the capacitor C2; the second pin of the driving chip U1 is grounded; the sixth pin of the driving chip U1 is grounded via the resistor R4; the capacitor C3 is connected in parallel with the resistor R4; the fourth pin of the driving chip U1 is grounded via the capacitor C1; the fourth pin of the driving chip U1 is connected to the constant voltage power supply 6 via the resistor R1; the driving chip The first pin of the chip U1 is connected to the gate of the MOS tube Q1 via the resistor R3, the gate of the MOS tube Q1 is grounded via the resistor R5, the source of the MOS tube Q1 is connected to the sixth pin of the driving chip U1, the drain of the MOS tube Q1 is connected to the cathode of the LED3 via the inductor L1, the drain of the MOS tube Q1 is connected to the anode of the diode D1; the cathode of the diode D1 is connected to the anode of the LED1, the anode of the LED1 is also connected to the constant voltage power supply 6, the anode of the LED2 is connected to the cathode of the LED1, and the cathode of the LED2 is connected to the anode of the LED3.

[0026] The driver chip U1 is a step-down LED constant current driver IC, which is the core control device of the constant current driver circuit. It is combined with the freewheeling diode D1, the energy storage inductor L1 and the switch control MOS tube Q1 to form a constant current driver control circuit; the resistor R4 is the output current sampling resistor, and the voltage across the resistor R4 is input into the internal sampling circuit of the driver chip U1 through the sixth pin of the driver chip U1. The output duty cycle of the driver chip U1 is adjusted according to the sampling result to control the switching time ratio of the MOS tube Q1, thereby changing the charging time of the energy storage inductor L1 and realizing constant current control of LED1, LED2 and LED3.

[0027] The circuit principle of the constant current driving unit 3 is simple, the control efficiency is high, and it can control LED1, LED2 and LED3 with constant current.

[0028] The above embodiment further includes a power management unit 8 , which is electrically connected to the constant voltage power supply 6 , and is also electrically connected to the single chip computer 1 .

[0029] The power management unit 8 is used to convert the 36V output by the constant voltage power supply 6 into 3.3V, so as to provide stable 3.3V power for the single chip computer 1 and ensure the stable operation of the single chip computer 1.

[0030] In the above embodiment, Figure 3As shown, the power management unit 8 includes resistors R6-R7, resistor R9, resistor R11, varistor R8, varistor R10, varistor R12, fuse F1, capacitors C4-C6, capacitor C8, capacitors C10-C11, diode D2, electrolytic capacitor C7, electrolytic capacitor C9, inductor L2 and power management chip U2; one end of the varistor R8 is connected to the constant voltage power supply 6, and the other end of the varistor R8 is grounded; one end of the varistor R12 is connected to the varistor R8, and the other end is grounded via the capacitor C11; one end of the varistor R10 is connected to the constant voltage power supply 6, and the other end is grounded via the capacitor C11, and the capacitor C10 is connected in parallel with the varistor R10;

[0031] One end of the fuse F1 is connected to the constant voltage power supply 6, and the other end is connected to the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the second pin of the power management chip U2. One end of the electrolytic capacitor C9 is connected to the negative electrode of the diode D2, and the other end is grounded via the capacitor C11. The first pin of the power management chip U2 is grounded via the capacitor C11, and the first pin of the power management chip U2 is also connected to its ninth pin. The fourth pin of the power management chip U2 is grounded via the resistor R9 and the capacitor C11. The third pin of the power management chip U2 is connected to its second pin. The fifth pin of the power management chip U2 is grounded via the resistor R1 1 is grounded, the seventh pin of the power management chip U2 is connected to the eighth pin of the power management chip U2 via the capacitor C5; the eighth pin of the power management chip U2 is connected to one end of the resistor R6 via the inductor L2, and the other end of the resistor R6 is grounded via the resistor R11; one end of the resistor R7 is connected to one end of the inductor L2, and the other end of the resistor R7 is connected to the other end of the inductor L2 via the capacitor C4; one end of the capacitor C8 is connected to the resistor R7, and the other end is connected to the fifth pin of the power management chip U2; one end of the electrolytic capacitor C7 is connected to the inductor L2, and the other end is grounded; the capacitor C6 is connected in parallel with the electrolytic capacitor C7.

[0032] In the above embodiment, Figure 4As shown, the power management unit 8 also includes an electrolytic capacitor C12, capacitors C13-C15, a transient suppression diode TVS1 and a voltage regulator chip U3, the capacitor C14 is connected in parallel with the capacitor C6, and the capacitor C15 is connected in parallel with the capacitor C14; the third pin of the voltage regulator chip U3 is connected to the capacitor C15, the first pin of the voltage regulator chip U3 is grounded, the second pin of the voltage regulator chip U3 is connected to the fourth pin, the fourth pin of the voltage regulator chip U3 is grounded via the electrolytic capacitor C12, and the capacitor C13 is connected in parallel with the electrolytic capacitor C12; the transient suppression diode TVS1 is connected in parallel with the capacitor C13.

[0033] During specific implementation, the varistor R8, the varistor R10 and the varistor R12 form a first-level surge protection circuit, and the slow-blow fuse F1 serves as an overcurrent protection device to form a second-level protection circuit to prevent instantaneous high-voltage pulses and large current pulses in the circuit from entering the subsequent circuit and causing damage to the microcontroller; the diode D2 serves as an anti-reverse connection protection device; the power management unit 8 uses a combination of DC-DC and LDO to provide a 3.3V power supply for the microcontroller. The DC-DC conversion has a higher conversion efficiency in the high-voltage drop power conversion. In order to reduce the ripple generated by the DC-DC power conversion, the LDO has the characteristic of a good power supply rejection ratio, and the 6V voltage output by the DC-DC is converted into the 3.3V electric energy required by the microcontroller 1. The ripple of the 3.3V electric energy is significantly reduced, ensuring that the microcontroller 1 works stably.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An LED dual color temperature tunnel light, characterized by: The invention comprises a single chip microcomputer (1), a communication unit (2), two constant current drive units (3), a warm-color light-emitting unit (4), a cold-color light-emitting unit (5) and a constant voltage power supply (6); the signal end of the single chip microcomputer (1) is connected to the communication unit (2); the signal end of the single chip microcomputer (1) is also respectively connected to the signal ends of the two constant current drive units (3); the communication unit (2) is also connected to an external control gateway (7); the input ends of the two constant current drive units (3) are both electrically connected to the constant voltage power supply (6); the output ends of the two constant current drive units (3) are respectively electrically connected to the two warm-color light-emitting units (4) and the cold-color light-emitting unit (5).

2. The LED dual color temperature tunnel light according to claim 1, characterized in that: The constant current drive unit (3) comprises resistors R1-R5, a drive chip U1, capacitors C1-C3, an inductor L1, a MOS tube Q1 and a diode D1; the third pin of the drive chip U1 is connected to the output end of the single chip computer (1); the fifth pin of the drive chip U1 is grounded via a capacitor C2; the second pin of the drive chip U1 is grounded; the sixth pin of the drive chip U1 is grounded via a resistor R4; the capacitor C3 is connected in parallel with the resistor R4; the fourth pin of the drive chip U1 is grounded via a capacitor C1; the fourth pin of the drive chip U1 is connected to a constant voltage power supply (6) via a resistor R1; the drive The first pin of the chip U1 is connected to the gate of the MOS tube Q1 via a resistor R3, the gate of the MOS tube Q1 is grounded via a resistor R5, the source of the MOS tube Q1 is connected to the sixth pin of the driving chip U1, the drain of the MOS tube Q1 is connected to the cathode of the LED3 via an inductor L1, the drain of the MOS tube Q1 is connected to the anode of the diode D1; the cathode of the diode D1 is connected to the anode of the LED1, the anode of the LED1 is also connected to a constant voltage power supply (6), the anode of the LED2 is connected to the cathode of the LED1, and the cathode of the LED2 is connected to the anode of the LED3.

3. The LED dual color temperature tunnel light according to claim 1 or 2, characterized in that: It also comprises a power management unit (8), wherein the power management unit (8) is electrically connected to the constant voltage power supply (6), and the power management unit (8) is also electrically connected to the single chip computer (1).

4. The LED dual color temperature tunnel light according to claim 3, characterized in that: The power management unit (8) comprises resistors R6-R7, resistor R9, resistor R11, varistor R8, varistor R10, varistor R12, fuse F1, capacitors C4-C6, capacitor C8, capacitors C10-C11, diode D2, electrolytic capacitor C7, electrolytic capacitor C9, inductor L2 and power management chip U2; one end of the varistor R8 is connected to the constant voltage power supply (6), and the other end of the varistor R8 is grounded; one end of the varistor R12 is connected to the varistor R8, and the other end is grounded via the capacitor C11; one end of the varistor R10 is connected to the constant voltage power supply (6), and the other end is grounded via the capacitor C11, and the capacitor C10 is connected in parallel with the varistor R10; One end of the fuse F1 is connected to the constant voltage power supply (6), and the other end is connected to the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the second pin of the power management chip U2. One end of the electrolytic capacitor C9 is connected to the negative electrode of the diode D2, and the other end is grounded via the capacitor C11. The first pin of the power management chip U2 is grounded via the capacitor C11, and the first pin of the power management chip U2 is also connected to its ninth pin. The fourth pin of the power management chip U2 is grounded via the resistor R9 and the capacitor C11. The third pin of the power management chip U2 is connected to its second pin. The fifth pin of the power management chip U2 is grounded via the resistor R 11 is grounded, the seventh pin of the power management chip U2 is connected to the eighth pin of the power management chip U2 via capacitor C5; the eighth pin of the power management chip U2 is connected to one end of the resistor R6 via inductor L2, and the other end of the resistor R6 is grounded via resistor R11; one end of the resistor R7 is connected to one end of the inductor L2, and the other end of the resistor R7 is connected to the other end of the inductor L2 via capacitor C4; one end of the capacitor C8 is connected to the resistor R7, and the other end is connected to the fifth pin of the power management chip U2; one end of the electrolytic capacitor C7 is connected to the inductor L2, and the other end is grounded; the capacitor C6 is connected in parallel with the electrolytic capacitor C7.

5. The LED dual color temperature tunnel light according to claim 4, characterized in that: The power management unit (8) further comprises an electrolytic capacitor C12, capacitors C13-C15, a transient suppression diode TVS1 and a voltage stabilizing chip U3, wherein the capacitor C14 is connected in parallel with the capacitor C6, and the capacitor C15 is connected in parallel with the capacitor C14; the third pin of the voltage stabilizing chip U3 is connected with the capacitor C15, the first pin of the voltage stabilizing chip U3 is grounded, the second pin of the voltage stabilizing chip U3 is connected with its fourth pin, the fourth pin of the voltage stabilizing chip U3 is grounded via the electrolytic capacitor C12, the capacitor C13 is connected in parallel with the electrolytic capacitor C12; and the transient suppression diode TVS1 is connected in parallel with the capacitor C13.

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