CN211982190U - Tunnel loop light modulation device - Google Patents
Tunnel loop light modulation device Download PDFInfo
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- CN211982190U CN211982190U CN202020967159.1U CN202020967159U CN211982190U CN 211982190 U CN211982190 U CN 211982190U CN 202020967159 U CN202020967159 U CN 202020967159U CN 211982190 U CN211982190 U CN 211982190U
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Abstract
The utility model discloses a tunnel loop dimming device, which comprises a power circuit, a main MCU, an RS485 communication circuit, a 10V voltage stabilizing circuit, a dimming circuit and a high-power voltage following circuit; the power supply circuit is electrically connected with the main MCU, the RS485 communication circuit, the 10V voltage stabilizing circuit and the high-power voltage following circuit and supplies power to the main MCU, the RS485 communication circuit and the 10V voltage stabilizing circuit; the 10V voltage stabilizing circuit, the dimming circuit and the high-power voltage follower circuit are electrically connected in sequence; the dimming circuit is electrically connected with the main MCU and receives a PWM signal of the main MCU; and the RS485 communication circuit is connected with the main MCU, and the main MCU is communicated with the centralized control center through the RS485 communication circuit. The utility model discloses the structure is ingenious, and load quantity of adjusting luminance is more, and the load is when great, and the cable of adjusting luminance is longer, and the output voltage of adjusting luminance does not fall the electricity, and load current of adjusting luminance can support 200mA at most, and the structure is more stable.
Description
Technical Field
The utility model relates to a tunnel return circuit field of adjusting luminance especially relates to a tunnel return circuit device of adjusting luminance.
Background
Good tunnel lighting is a necessary condition for ensuring traffic safety. The tunnel lighting is related to indexes such as driving speed and traffic flow allowed by the tunnel, and is closely related to natural geographic conditions such as the position of the tunnel and brightness outside the tunnel, so that the tunnel lamp is required to provide lighting brightness suitable for the tunnel lamp, namely, the lighting facility is required to have a dimming function. The tunnel lighting lamps widely used at present, such as HID lamps and fluorescent lamps, are not suitable for long-term dimming control due to technical reasons. With the development of LED packaging and application technologies, the LED has greatly improved lumen efficiency, color rendering, power and other aspects, and the LED lamp used for tunnel illumination has become a development trend. So far, many newly built tunnels adopt the new light source, and a good effect is achieved. The LED lamp is energy-saving and environment-friendly, and has good dimming performance, so that a new technical choice is provided for solving the problem of tunnel dimming illumination. The tunnel lighting has the dimming function, so that the brightness in the tunnel can better adapt to the change of the ambient brightness outside the tunnel, the black hole effect and the white hole effect of the tunnel are reduced or eliminated, and a safe and comfortable lighting environment is provided for road traffic. The dimming function of tunnel illumination can also reduce or avoid a large amount of illumination power consumptions extravagant, the energy can be saved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stable in structure's tunnel return circuit device of adjusting luminance.
Realize the utility model discloses the technical scheme of purpose is: a tunnel loop dimming device comprises a power supply circuit, a main MCU, an RS485 communication circuit, a 10V voltage stabilizing circuit, a dimming circuit and a high-power voltage follower circuit; the power supply circuit is electrically connected with the main MCU, the RS485 communication circuit, the 10V voltage stabilizing circuit and the high-power voltage following circuit and supplies power to the main MCU, the RS485 communication circuit and the 10V voltage stabilizing circuit; the 10V voltage stabilizing circuit, the dimming circuit and the high-power voltage follower circuit are electrically connected in sequence; the dimming circuit is electrically connected with the main MCU and receives a PWM signal of the main MCU; and the RS485 communication circuit is connected with the main MCU, and the main MCU is communicated with the centralized control center through the RS485 communication circuit.
The power supply circuit comprises an AC-DC power supply module and a DC-DC power supply module; the input end of the AC-DC power supply module is connected with a 220V alternating current power supply end, converts 220V alternating current into 12V voltage and supplies power to the DC-DC power supply module, the 10V voltage stabilizing circuit and the high-power voltage following circuit; and the DC-DC power supply module converts the 12V voltage into the 5V voltage and supplies power to the main MCU and the RS485 communication circuit.
The main MCU adopts a Renesas R7F902 chip.
A first lightning protection circuit is arranged on an output port of the RS485 communication circuit; and a second lightning protection circuit is arranged on the dimming circuit.
The 10V voltage stabilizing circuit limits the highest bit of the output voltage value of the dimming circuit to 10V.
The dimming circuit receives the PWM signal of the main MCU and outputs different voltages according to different PWM signal duty ratios.
By adopting the technical scheme, the utility model discloses following beneficial effect has: (1) the utility model discloses the structure is ingenious, and load quantity of adjusting luminance is more, and the load is when great, and the cable of adjusting luminance is longer, and the output voltage of adjusting luminance does not fall the electricity, and load current of adjusting luminance can support 200mA at most, and the structure is more stable.
(2) The utility model discloses a power supply circuit can prevent common mode + -4 KV, differential mode + -2 KV thunderbolt.
(3) The utility model discloses a be equipped with first lightning protection circuit on RS485 communication circuit's the output port, be equipped with second lightning protection circuit on the dimmer circuit, the lightning protection effect is better.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic diagram of a wire frame of the present invention;
FIG. 2 is a circuit diagram of the main MCU of the present invention;
fig. 3 is a circuit diagram of an RS485 communication circuit of the present invention;
fig. 4 is a circuit diagram of the 10V voltage stabilizing circuit, the dimming circuit and the high-power voltage follower circuit of the present invention.
The reference numbers are: the power supply circuit comprises a power supply circuit 1, an AC-DC power supply module 1-1, a DC-DC power supply module 1-2, a main MCU2, an RS485 communication circuit 3, a 10V voltage stabilizing circuit 4, a dimming circuit 5 and a high-power voltage follower circuit 6.
Detailed Description
Example one
Referring to fig. 1 to 4, the tunnel loop dimming device of the present embodiment includes a power circuit 1, a main MCU2, an RS485 communication circuit 3, a 10V voltage stabilizing circuit 4, a dimming circuit 5, and a high-power voltage follower circuit 6.
The power supply circuit 1 is electrically connected with the main MCU2, the RS485 communication circuit 3, the 10V voltage stabilizing circuit 4 and the high-power voltage follower circuit 6 and supplies power for the main MCU2, the RS485 communication circuit 3 and the 10V voltage stabilizing circuit 4. The 10V voltage stabilizing circuit 4, the dimming circuit 5 and the high-power voltage follower circuit 6 are electrically connected in sequence. The dimming circuit 5 is electrically connected to the main MCU2, and receives a PWM signal of the main MCU 2. The RS485 communication circuit 3 is connected with the main MCU2, and the main MCU2 is communicated with the centralized control center through the RS485 communication circuit 3. The RS485 communication circuit 3 receives a control signal of the centralized control center and transmits a feedback signal of the MCU2 to the centralized control center.
In the present embodiment, the power supply circuit 1 includes an AC-DC power supply module 1-1 and a DC-DC power supply module 1-2. The input end of the AC-DC power supply module 1-1 is connected with a 220V alternating current power supply end, converts 220V alternating current into 12V voltage, and supplies power to the DC-DC power supply module 1-2, the 10V voltage stabilizing circuit 4 and the high-power voltage follower circuit 6. The DC-DC power supply module 1-2 converts the 12V voltage into the 5V voltage and supplies power to the main MCU2 and the RS485 communication circuit 3.
In this embodiment, the main MCU2 adopts a Renesas R7F902 chip, which is loaded with 64KB Flash, and software upgrade is performed on the main MCU2 by using an RS485 circuit. The output port of the RS485 communication circuit 3 is provided with a first lightning protection circuit, and V8, V9, V5, V7, D1, F1, R8 and R21 in the RS485 communication circuit 3 form the first lightning protection circuit. The dimming circuit 5 is provided with a second lightning protection circuit. The 10V voltage stabilizing circuit 4 limits the highest bit 10V of the output voltage value of the dimming circuit 5. The dimming circuit 5 receives the PWM signal of the main MCU2 and outputs different voltages according to different PWM signal duty ratios.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A tunnel loop dimming device is characterized in that: the device comprises a power supply circuit (1), a main MCU (2), an RS485 communication circuit (3), a 10V voltage stabilizing circuit (4), a dimming circuit (5) and a high-power voltage following circuit (6); the power supply circuit (1) is electrically connected with the main MCU (2), the RS485 communication circuit (3), the 10V voltage stabilizing circuit (4) and the high-power voltage following circuit (6) and supplies power to the main MCU (2), the RS485 communication circuit (3) and the 10V voltage stabilizing circuit (4); the 10V voltage stabilizing circuit (4), the dimming circuit (5) and the high-power voltage following circuit (6) are electrically connected in sequence; the dimming circuit (5) is electrically connected with the main MCU (2) and receives a PWM signal of the main MCU (2); the RS485 communication circuit (3) is connected with the main MCU (2), and the main MCU (2) is communicated with the centralized control center through the RS485 communication circuit (3).
2. The tunnel loop dimming device of claim 1, wherein: the power supply circuit (1) comprises an AC-DC power supply module (1-1) and a DC-DC power supply module (1-2); the input end of the AC-DC power supply module (1-1) is connected with a 220V alternating current power supply end, converts 220V alternating current into 12V voltage, and supplies power for the DC-DC power supply module (1-2), the 10V voltage stabilizing circuit (4) and the high-power voltage following circuit (6); the DC-DC power supply module (1-2) converts 12V voltage into 5V voltage and supplies power to the main MCU (2) and the RS485 communication circuit (3).
3. The tunnel loop dimming device of claim 1, wherein: the main MCU (2) adopts a Renesas R7F902 chip.
4. The tunnel loop dimming device of claim 1, wherein: a first lightning protection circuit is arranged on an output port of the RS485 communication circuit (3); and a second lightning protection circuit is arranged on the dimming circuit (5).
5. The tunnel loop dimming device of claim 1, wherein: the 10V voltage stabilizing circuit (4) limits the maximum output voltage value of the dimming circuit (5) to 10V.
6. The tunnel loop dimming device of claim 1, wherein: the dimming circuit (5) receives the PWM signal of the main MCU (2) and outputs different voltages according to different PWM signal duty ratios.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967159.1U CN211982190U (en) | 2020-06-01 | 2020-06-01 | Tunnel loop light modulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967159.1U CN211982190U (en) | 2020-06-01 | 2020-06-01 | Tunnel loop light modulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211982190U true CN211982190U (en) | 2020-11-20 |
Family
ID=73371075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020967159.1U Active CN211982190U (en) | 2020-06-01 | 2020-06-01 | Tunnel loop light modulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211982190U (en) |
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2020
- 2020-06-01 CN CN202020967159.1U patent/CN211982190U/en active Active
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