A lighting system brightness optimization control circuit

Abstract

The utility model discloses a kind of lighting system brightness optimization control circuit, it is related to circuit field, including F103C8T6 minimum system board and BH1750 illumination sensor module, U conversion module, OLED liquid crystal screen module and LED lamp pearl module;The F103C8T6 minimum system board includes main control chip U1, USB power supply circuit, filter voltage stabilizing circuit, clock crystal oscillator circuit and system reset circuit;The BH1750 illumination sensor module, U conversion module, OLED liquid crystal screen module, LED lamp pearl module, clock crystal oscillator circuit and system reset circuit are connected with main control chip U1 signal;The USB power supply circuit is powered by filter voltage stabilizing circuit for circuit;The model of main control chip U1 is STM32F103C8T6.The utility model's advantage is in: by host computer acquisition congestion delay index data, the brightness of the lighting system controlled jointly by combination illumination data.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to a brightness optimization control circuit for a lighting system. Background Technology

[0002] Traditional streetlights generally employ a fixed dimming control mode, whose core flaw lies in its limited dimming options and lack of precision in output brightness. Specifically, these systems typically preset fixed brightness levels (e.g., full brightness, half brightness) or switch brightness only based on fixed time points (e.g., turning on at sunset, turning off at sunrise), completely ignoring the dynamic relationship between real-time ambient light changes and road traffic flow. For example, at night, there may be significant differences between peak traffic hours (e.g., evening rush hour return trips) and off-peak hours (e.g., early morning hours). However, fixed dimming cannot adjust brightness according to traffic flow. Insufficient brightness during peak hours increases the risk of accidents, while continuous high brightness during off-peak hours results in significant energy waste. Furthermore, even within the same time period, differences in ambient light caused by different weather conditions (e.g., cloudy days, smog) cannot be detected by the system, resulting in a persistent discrepancy between the streetlight output brightness and actual needs. This compromises both driving safety and energy efficiency.

[0003] Therefore, this application proposes a brightness control circuit for a lighting system to solve the above problems. Utility Model Content

[0004] To address the aforementioned shortcomings in the existing technology, this utility model provides a brightness optimization control circuit for a lighting system.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows:

[0006] A brightness optimization control circuit for a lighting system.

[0007] This includes the F103C8T6 minimum system board, BH1750 light sensor module, U-conversion module, OLED LCD screen module, and LED lamp bead module;

[0008] The F103C8T6 minimum system board includes a main control chip U1, a USB power supply circuit, a filter and voltage regulator circuit, a clock crystal circuit, and a system reset circuit.

[0009] The BH1750 light sensor module, U-conversion module, OLED LCD screen module, LED lamp bead module, clock crystal circuit and system reset circuit are connected to the main control chip U1 via signals.

[0010] The USB power supply circuit is powered by a filter and voltage regulator circuit.

[0011] The main control chip U1 is an STM32F103C8T6.

[0012] Furthermore, the USB power circuit includes a Mini-USB power supply circuit, a step-down circuit, and an indicator light circuit;

[0013] The Mini-USB power supply circuit includes a chip J1, pin 1 of which is connected to an external 5V power input, and pin 5 of which is grounded.

[0014] The step-down circuit includes a chip U2, model AMS1117-3.3. A capacitor C6 is connected between pins 1 and 3 of the chip U2. A capacitor C5 is connected in parallel with the capacitor C6. One end of the capacitor C5 is connected to an external 5V power input. A capacitor C7 is connected between pins 1 and 2 of the chip U2. A capacitor C8 is connected in parallel with the capacitor C7. The two ends of the capacitor C8 output a 3.3V power supply and ground, respectively.

[0015] The indicator circuit includes a resistor R2 and an LED D2 connected in series. The resistor R2 is connected to a 3.3V power supply, and the LED D2 is grounded.

[0016] Furthermore, the filtering and voltage regulation circuit includes capacitors C11, C12, C13, C14 and C16, which are connected in parallel. One end of capacitor C16 is connected to a 3.3V power supply, and the other end is grounded.

[0017] Furthermore, the clock crystal circuit includes a passive crystal oscillator Y1, the model of which is XTAL-8M. Pins 1 and 2 of the passive crystal oscillator Y1 are connected to pins 6 and 5 of the main control chip U1, respectively. A resistor R27 is connected in parallel to the passive crystal oscillator Y1. Pins 1 and 2 of the passive crystal oscillator Y1 are grounded through capacitors C7 and C6, respectively.

[0018] Furthermore, the system reset circuit includes a reset element S1, a capacitor C2, and a resistor R1. One end of the reset element S1 is connected to pin 7 of the main control chip U1, and the other end is grounded. A capacitor C2 is connected in parallel to the reset element S1, and the capacitor C2 is connected to a 3.3V power supply through a resistor R10.

[0019] Furthermore, the BH1750 light sensor module includes sensor P2, which is model BH1750. Pin 1 of sensor P2 is connected to an external 5V power supply, pin 2 of sensor P2 is grounded, and pins 3 and 4 of sensor P2 are connected to pins 21 and 22 of the main control chip U1, respectively.

[0020] Furthermore, the U-conversion module includes a chip P1, which is a CH340 chip. Pin 1 of the chip P1 is connected to an external 5V power supply. Pins 2 and 3 of the chip P1 are connected to the main control chip U1. Pins 4 and 5 of the chip P1 are connected to pins 31 and 30 of the main control chip U1, respectively. Pin 6 of the chip P1 is grounded.

[0021] Furthermore, the OLED LCD screen module includes a chip P3, the model of which is SSD1306. Pin 1 of the chip P3 is grounded, pin 2 of the chip P3 is connected to an external 5V power supply, and pins 3 and 4 of the chip P3 are connected to pins 46 and 45 of the main control chip U1.

[0022] Furthermore, the LED lamp module includes a resistor R3 and an LED lamp D1 connected in series. The resistor R3 is connected to a 3.3V power supply, and the LED lamp D1 is connected to pin 18 of the main control chip.

[0023] Furthermore, pins 9, 36, and 48 of the main control chip U1 are connected to a 3.3V power supply and grounded through capacitor C9. Pins 23, 35, 44, and 47 of the main control chip U1 are grounded, and pin 24 of the main control chip U1 is connected to a 3.3V power supply.

[0024] Compared to traditional technologies, the advantages of this utility model are:

[0025] This circuit, based on the F103C8T6 minimum system board, combines a BH1750 light sensor module, a U-conversion module, an OLED LCD screen module, and an LED lamp module. It enables the upper computer to acquire congestion delay index data and control the brightness of the lighting system in conjunction with illuminance data. This allows the street light brightness to be adaptively adjusted in a timely manner according to the ambient brightness, ensuring that the street light output brightness matches the actual demand and reducing the waste of power resources. Attached Figure Description

[0026] Figure 1 This is the circuit schematic diagram of this utility model;

[0027] Figure 2 This is the circuit schematic diagram of the USB power supply circuit of this utility model;

[0028] Figure 3 This is the circuit schematic diagram of the filter and voltage regulator circuit of this utility model; Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0030] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0031] To make the content of this utility model easier to understand, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model.

[0032] Example 1

[0033] Combined with appendix Figure 1-2 It includes the F103C8T6 minimum system board and the BH1750 light sensor module, U-conversion module, OLED LCD screen module and LED lamp bead module.

[0034] The F103C8T6 minimum system board includes a main control chip U1, a USB power supply circuit, a filter and voltage regulator circuit, a clock crystal circuit, and a system reset circuit.

[0035] The BH1750 light sensor module, U-conversion module, OLED LCD screen module, LED lamp bead module, clock crystal circuit, and system reset circuit are connected to the main control chip U1 via signals.

[0036] The USB power supply circuit supplies power to the circuit through a filter and voltage regulator circuit.

[0037] The main control chip U1 is an STM32F103C8T6.

[0038] The USB power circuit includes a Mini-USB power supply circuit, a step-down circuit, and an indicator light circuit.

[0039] The Mini-USB power supply circuit includes a chip J1, pin 1 of which is connected to an external 5V power input, and pin 5 of which is grounded.

[0040] The step-down circuit includes a chip U2, model AMS1117-3.3. A capacitor C6 is connected between pins 1 and 3 of the chip U2. A capacitor C5 is connected in parallel with the capacitor C6. One end of the capacitor C5 is connected to an external 5V power input. A capacitor C7 is connected between pins 1 and 2 of the chip U2. A capacitor C8 is connected in parallel with the capacitor C7. The two ends of the capacitor C8 output a 3.3V power supply and ground, respectively.

[0041] The indicator circuit includes a resistor R2 and an LED D2 connected in series. The resistor R2 is connected to a 3.3V power supply, and the LED D2 is grounded.

[0042] The USB power supply circuit consists of three parts: a Mini-USB power supply circuit, a buck converter circuit, and an indicator light circuit. The Mini-USB power supply circuit provides an external 5V power input to power the entire system. The buck converter circuit consists of an AMS1117-3.3 linear regulator chip U2 and a filter circuit. Chip U2 uses an internal feedback circuit to linearly reduce the high voltage provided by the power supply circuit to a stable 3.3V output. Capacitors C5 and C8 are 10μF electrolytic capacitors. Capacitor C5 on the input side filters out low-frequency ripple from the power supply circuit input, and on the output side, it filters out residual ripple from the 3.3V output, further stabilizing the voltage. Capacitors C6 and C9 are 0.1μF ceramic capacitors used to filter out high-frequency noise and stabilize the high-frequency response. The indicator light circuit indicates the power status; when LED D2 is lit, it indicates that the circuit is active.

[0043] Combined with appendix Figure 3 The filtering and voltage regulation circuit includes capacitors C11, C12, C13, C14 and C16, which are connected in parallel. One end of capacitor C16 is connected to a 3.3V power supply, and the other end is grounded.

[0044] The filtering and voltage regulation circuit uses a multi-stage capacitor approach to filter out ripple and noise on the 3.3V power supply, stabilizing the voltage. Wide-band filtering is achieved through power supply decoupling design. Capacitors C11, C12, C13, and C14 are 0.1μF ceramic capacitors, effectively filtering high-frequency noise on the power lines; capacitor C16 is a 10μF electrolytic capacitor used to filter low-frequency ripple on the power lines.

[0045] Combined with appendix Figure 1 The clock crystal circuit includes a passive crystal oscillator Y1, which is model XTAL-8M. Pins 1 and 2 of the passive crystal oscillator Y1 are connected to pins 6 and 5 of the main control chip U1, respectively. A resistor R27 is connected in parallel to the passive crystal oscillator Y1. Pins 1 and 2 of the passive crystal oscillator Y1 are grounded through capacitors C7 and C6, respectively.

[0046] The clock crystal circuit provides a precise 8MHz clock signal to the main control chip U1. Its core component is a passive crystal oscillator Y1 (model XTAL-8M), which generates an 8MHz sinusoidal oscillation signal through piezoelectric effect, providing the fundamental clock frequency for the main control chip U1. Capacitors C6 and C7 are connected in parallel with the passive crystal oscillator Y1, forming the load capacitor of the resonant circuit, used to stabilize the oscillation frequency of the crystal and filter out high-frequency noise. Resistor R27 is a 1MΩ starting resistor, connected in parallel across the passive crystal oscillator Y1, providing DC bias for the oscillation circuit.

[0047] Combined with appendix Figure 1The system reset circuit includes a reset element S1, a capacitor C2 and a resistor R1. One end of the reset element S1 is connected to pin 7 of the main control chip U1, and the other end is grounded. A capacitor C2 is connected in parallel to the reset element S1, and the capacitor C2 is connected to a 3.3V power supply through a resistor R10.

[0048] The system reset circuit implements a manual reset circuit for low-level reset through pull-up resistors, a reset button, and a filter capacitor. Resistor R1 is a 10kΩ pull-up resistor. When the system is not reset, pin 7 (NRST) of the main control chip U1 is pulled to a high level of 3.3V, putting the main control chip U1 into operation. Capacitor C2 is a 0.1μF capacitor, used to eliminate high-frequency noise from the power line and suppress mechanical jitter. S1 is a manual trigger reset element.

[0049] Combined with appendix Figure 1 The BH1750 light sensor module includes sensor P2, which is model BH1750. Pin 1 of sensor P2 is connected to an external 5V power supply, pin 2 of sensor P2 is grounded, and pins 3 and 4 of sensor P2 are connected to pins 21 and 22 of the main control chip U1, respectively.

[0050] The BH1750 light sensor module measures light intensity by converting light signals into electrical signals and then into digital signals. The sensor P2 internally consists of a PD photodiode, an AMP operational amplifier, an ADC analog-to-digital converter, an OSC oscillator, logic units, and I / O pins. 2 The interface is C-type. The PD diode converts the illuminance value into an electrical signal, which is then amplified by an operational amplifier. The ADC collects the electrical signal and converts it into a 16-bit binary number, which is stored in an internal register. Inside sensor P2, the input voltage and light intensity are linearly expressed, and the signal is output through the SCL, SDA clock lines and data lines. The microcontroller connects via I / O. 2 C reads a 16-bit binary number from an internal register and converts it into the actual light intensity.

[0051] Combined with appendix Figure 1 The U-conversion module includes a chip P1, which is a CH340 chip. Pin 1 of the chip P1 is connected to an external 5V power supply. Pins 2 and 3 of the chip P1 are connected to the main control chip U1. Pins 4 and 5 of the chip P1 are connected to pins 31 and 30 of the main control chip U1, respectively. Pin 6 of the chip P1 is grounded.

[0052] The core of the U-conversion module is the CH340 USB-to-UART chip P1. Its function is to convert virtual serial port data from the computer's USB port into UART level signals, enabling communication with the USART serial port of the STM32F103C8T6 microcontroller, thus facilitating data transmission and reception from the host computer to the microcontroller. Pin 1 is the power supply pin of chip P1, powered by an external 5V supply, providing the operating voltage for chip P1. Pin 4 is the UART transmit pin of chip P1, connected to pin 31 of the host control chip U1, transmitting the data sent by chip P1 to the host control chip U1. Pin 5 is the UART receive pin of chip P1, connected to pin 30 of the host control chip U1, used to receive data sent by the host control chip U1. Pin 6 is the ground pin of chip P1, connected to the ground terminal of the host control chip U1, ensuring consistent signal level references.

[0053] Combined with appendix Figure 1 The OLED LCD module includes a chip P3, which is an SSD1306 chip. Pin 1 of the chip P3 is grounded, pin 2 of the chip P3 is connected to an external 5V power supply, and pins 3 and 4 of the chip P3 are connected to pins 46 and 45 of the main control chip U1.

[0054] The OLED LCD module incorporates a P3 chip (model SSD1306) and connects via I... 2 The C protocol communicates with the main control chip U1 to display congestion delay index data obtained from the host computer and brightness data obtained from the illuminance sensor.

[0055] Combined with appendix Figure 1 The LED lamp module includes a resistor R3 and an LED D1 connected in series. The resistor R3 is connected to a 3.3V power supply, and the LED D1 is connected to pin 18 of the main control chip.

[0056] The LED module is used to simulate streetlights in a lighting system and connects to pin 18 of the main control chip U1. Resistor R3 is a 510Ω current-limiting resistor to limit the current flowing through the LED and prevent excessive current from burning out the LED. LED D1 is a light-emitting diode that emits light when powered on, providing indication or lighting functions.

[0057] Example 2

[0058] Combined with appendix Figure 1 The SWD debugging interface circuit includes an interface chip. Pins 1 and 2 of the interface chip are connected to pins 37 and 34 of the main control chip U1, respectively. Pins 3 and 4 of the interface chip are connected to the 3.3V power supply and ground, respectively. The SWD debugging interface circuit is used for debugging the entire circuit.

[0059] The above description is only a preferred embodiment of this utility model patent and is not intended to limit this utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model patent should be included within the protection scope of this utility model patent.

Claims

1. A brightness optimization control circuit for a lighting system, characterized in that, This includes the F103C8T6 minimum system board, BH1750 light sensor module, U-conversion module, OLED LCD screen module, and LED lamp bead module; The F103C8T6 minimum system board includes a main control chip U1, a USB power supply circuit, a filter and voltage regulator circuit, a clock crystal circuit, and a system reset circuit. The BH1750 light sensor module, U-conversion module, OLED LCD screen module, LED lamp bead module, clock crystal circuit and system reset circuit are connected to the main control chip U1 via signals. The USB power supply circuit is powered by a filter and voltage regulator circuit. The main control chip U1 is an STM32F103C8T6.

2. The brightness optimization control circuit for a lighting system according to claim 1, characterized in that: The USB power circuit includes a Mini-USB power supply circuit, a step-down circuit, and an indicator light circuit. The Mini-USB power supply circuit includes a chip J1, pin 1 of which is connected to an external 5V power input, and pin 5 of which is grounded. The step-down circuit includes a chip U2, model AMS1117-3.

3. A capacitor C6 is connected between pins 1 and 3 of the chip U2. A capacitor C5 is connected in parallel with the capacitor C6. One end of the capacitor C5 is connected to an external 5V power input. A capacitor C7 is connected between pins 1 and 2 of the chip U2. A capacitor C8 is connected in parallel with the capacitor C7. The two ends of the capacitor C8 output a 3.3V power supply and ground, respectively. The indicator circuit includes a resistor R2 and an LED D2 connected in series. The resistor R2 is connected to a 3.3V power supply, and the LED D2 is grounded.

3. The lighting system brightness optimization control circuit according to claim 1, characterized in that: The filtering and voltage regulation circuit includes capacitors C11, C12, C13, C14 and C16, which are connected in parallel. One end of capacitor C16 is connected to a 3.3V power supply, and the other end is grounded.

4. The lighting system brightness optimization control circuit according to claim 1, characterized in that: The clock crystal circuit includes a passive crystal oscillator Y1, which is model XTAL-8M. Pins 1 and 2 of the passive crystal oscillator Y1 are connected to pins 6 and 5 of the main control chip U1, respectively. A resistor R27 is connected in parallel to the passive crystal oscillator Y1. Pins 1 and 2 of the passive crystal oscillator Y1 are grounded through capacitors C7 and C6, respectively.

5. The lighting system brightness optimization control circuit according to claim 1, characterized in that: The system reset circuit includes a reset element S1, a capacitor C2, and a resistor R1. One end of the reset element S1 is connected to pin 7 of the main control chip U1, and the other end is grounded. A capacitor C2 is connected in parallel to the reset element S1, and the capacitor C2 is connected to a 3.3V power supply through a resistor R10.

6. The brightness optimization control circuit for a lighting system according to claim 1, characterized in that: The BH1750 light sensor module includes sensor P2, which is model BH1750. Pin 1 of sensor P2 is connected to an external 5V power supply, pin 2 of sensor P2 is grounded, and pins 3 and 4 of sensor P2 are connected to pins 21 and 22 of the main control chip U1, respectively.

7. The brightness optimization control circuit for a lighting system according to claim 1, characterized in that: The U-conversion module includes a chip P1, which is a CH340 chip. Pin 1 of the chip P1 is connected to an external 5V power supply. Pins 2 and 3 of the chip P1 are connected to the main control chip U1. Pins 4 and 5 of the chip P1 are connected to pins 31 and 30 of the main control chip U1, respectively. Pin 6 of the chip P1 is grounded.

8. The brightness optimization control circuit for a lighting system according to claim 1, characterized in that: The OLED LCD module includes a chip P3, which is an SSD1306. Pin 1 of the chip P3 is grounded, pin 2 of the chip P3 is connected to an external 5V power supply, and pins 3 and 4 of the chip P3 are connected to pins 46 and 45 of the main control chip U1.

9. The brightness optimization control circuit for a lighting system according to claim 1, characterized in that: The LED lamp module includes a resistor R3 and an LED D1 connected in series. The resistor R3 is connected to a 3.3V power supply, and the LED D1 is connected to pin 18 of the main control chip.

10. A brightness optimization control circuit for a lighting system according to claim 1, characterized in that: Pins 9, 36, and 48 of the main control chip U1 are connected to a 3.3V power supply and grounded through capacitor C9. Pins 23, 35, 44, and 47 of the main control chip U1 are grounded, and pin 24 of the main control chip U1 is connected to a 3.3V power supply.

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