CN200956677Y - Intelligent low-power solar yellow flashing light - Google Patents

Abstract

An intelligent solar energy amber flashing light in low power consumption, a control circuit of the amber flashing light is formed by a microcomputer control chip PIC16F676 as the core; the amber flashing light is driven to work by the pulse width modulation (PWM) control waveform which is changed by a control procedure in the microcomputer control chip automatically, on one hand, the luminous brightness of a LED in the amber flashing light is strengthened in the daytime, and the luminous brightness of the LED in the amber flashing light is reduced at night, on the other hand, when the terminal voltage of a battery has a falling trend, the luminous brightness of the LED in the amber flashing light is also reduced progressively, and when the terminal voltage of the battery continues falling, the control procedure changes the flash frequency of the amber flashing light automatically and progressively so as to utilize the electric energy rationally and lengthen the continuous working capacity of the amber flashing light at the rainy day effectively.

Description

Intelligent low-power solar yellow flashing light

Technical field

The utility model relates to an intelligent low-power solar energy yellow flashing light, which uses a microcomputer control chip PIC16F676 as the core to form a control circuit for the yellow flashing light, and uses a pulse width modulation (PWM) control waveform to drive the yellow flashing light to work. According to the power condition of the storage battery, the control program in the microcomputer control chip automatically changes the luminous brightness and flashing frequency of the yellow flashing light, so as to achieve a reasonable use of electric energy and further enhance the continuous working ability of the yellow flashing light in cloudy and rainy days.

Background technique

Generally, the common solar yellow flashing light has only one fixed working mode, that is, the yellow flashing light works with a fixed brightness and a fixed flashing frequency when the battery power is normal, in order to enhance the continuous working ability of the yellow flashing light in rainy days , can only increase the configuration of the power system or reduce the luminance of the lamp. The result of this is the increase of the cost, and the second is the deterioration of the visibility of the yellow flashing lamp, especially in the daytime when the ambient light is strong. worse.

Contents of the invention

In order to automatically adjust the working state of the yellow flashing light according to the brightness of the ambient light and the power of the battery, to use the electric energy reasonably, and to further enhance the continuous working ability of the yellow flashing light in rainy days without reducing the performance. The utility model provides an intelligent low-power solar energy yellow flashing light, which mainly uses a microcomputer control chip PIC16F676 as the core to form a control circuit for the yellow flashing light, and uses a pulse width modulation (PWM) control waveform to drive the yellow flashing light to work. The brightness of the light and the power condition of the storage battery are automatically changed by the control program in the microcomputer control chip. The brightness and flickering frequency of the yellow flashing light are simple, the circuit structure is simple, and the work is stable and reliable.

The technical scheme adopted in the utility model is: use a microcomputer control chip PIC16F676 as the core to form the control circuit of the yellow flashing light, use a photoelectric coupler (U3) as the ambient light detection input device, and its input terminal is connected to the solar cell assembly On the output line of the PIC16F676, its output terminal is connected to an input port (RA4) of PIC16F676, and two sets of series resistors (R13, R14, R15, R16) are connected to both ends of the battery to detect the change of the battery terminal voltage and respectively connected to To the two input ports (RC0, RC1) of PIC16F676, the position of each input port of PIC16F676 can be changed by its internal control program. Under different ambient light, the RA4 port of PIC16F676 will have different voltage values. When RA4 detects that it is daytime, the output terminal of PIC16F676 will output a PWM control signal with a large duty ratio to make the LED in the yellow flashing light average As the current increases, the luminance of the yellow flashing light panel composed of multiple LEDs will increase; when RA4 detects that it is nighttime, the output terminal of PIC16F676 will output a PWM control signal with a small duty ratio to make the yellow flashing light The average LED current deceleration is small, and the luminance of the LED lamp panel will decrease. At the same time, on another input port RC0 of PIC16F676, the voltage detection signal of the battery is input from this port. When the terminal voltage drop of the battery is detected PIC16F676 will gradually adjust the output PWM control signal to slow down the average LED current in the yellow flashing light. When the PWM control is adjusted to the designed minimum value, the terminal voltage of the battery will continue to show a downward trend. At this time , PIC16F676 will start to gradually adjust the intermittent time of the output PWM control signal, thereby reducing the flashing frequency of the yellow flashing light; when the battery voltage returns to normal, the yellow flashing light will automatically adjust to the default working state. The RC1 port of PIC16F676 is used to detect the undervoltage and overvoltage of the storage battery.

The beneficial effect of the utility model is that the continuous working ability of the yellow flashing light in rainy days can be further enhanced without reducing the overall performance of the yellow flashing light and without increasing the system configuration.

The general hardware circuit is easy to realize the time control of the street lamp, does not need complex professional software programming, is easy to manufacture and maintain, the circuit structure is simple, and the work is stable and reliable.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing is the circuit schematic diagram of the utility model.

In the picture: U1: microcomputer control chip PIC16F676, U2: three-terminal voltage regulator integrated circuit, U3, U4: photoelectric coupler, T1: NPN transistor, T2, T3: N-channel field effect transistor, BAT: battery, LED: for Light-emitting diodes, LEDS: lamp panel, D0-D4: diodes, C1-C5: capacitors, R1-R21 are resistors, PV+, PV- are input ports of solar cell components.

Specific implementation

In the figure, U1 is a microcomputer control chip PIC16F676, which mainly completes the charging control, dimming control and discharge protection functions of the battery. Its port RA4 is connected to the photocoupler U3 through a resistor R4, and the ports RC0 and RC1 are respectively connected through a resistor R15. , R16, R13, and R14 are connected to both ends of the battery. The charging control signal is output from the RA5 port and is isolated by the photocoupler U4 to control T3. The dimming control signal and discharge protection signal are output from the RC2 port to control T1 and T2. The source of T2 is connected to a yellow flashing light panel composed of several light-emitting diodes; RA2 is a temperature compensation control port, which performs temperature compensation by sampling the junction temperature change of diode D3, and RC3 and RC4 are used as the output of the working status indicator The ports are directly connected to LED1 and LED2, and all other unused ports of PIC16F676 are connected to the power supply VSS through resistors. The terminal voltage of the battery is transformed by U2 and stabilized to +5V, and then added to the VDD end of PIC16F676 for its work. The input terminal of the photocoupler U3 is connected to PV+ and PV- through the current limiting resistor R6. During the day, when the solar cell module is generating electricity normally, the input terminal of the photocoupler U3 will have current flowing, and the output terminal will become low. Level, at night, when the solar cell module cannot generate electricity normally, there is no current at the input terminal of the photocoupler U3, and the output terminal will become a high level, and the PIC16F676 adjusts the waveform of the dimming control signal by detecting the level change of the RA4 port . Resistors R15 and R16 are connected to the port RC0. When the voltage of the storage battery changes, R15 and R16 sample and divide the voltage and send the changed information to the PIC16F676 through the RC0 port. The dimming control waveform is determined by the program inside the PIC16F676. . Resistors R13 and R14 are connected to port RC1 to detect battery undervoltage and overvoltage. The position of each port in the circuit can be redefined by programming.

Claims (1)

1. intelligent low-power consumption solar energy brown flasher, utilize the flicker operating state of electronic circuit control solar energy brown flasher, it is characterized in that: with a microcomputerized control chip PIC16F676 is the control circuit that core is formed brown flasher, on the input port of PIC16F676, connecting a photoelectrical coupler (U3), photoelectrical coupler (U3) is used as ambient light and detects entering apparatus, its input is connected on the outlet line of solar module, its output is connected on the input port (RA4) of PIC16F676, with two resistance (R15, R16) be connected the electrode two ends of storage battery behind the polyphone, the mid point of serial resistance is connected on another input port (RC0) of PIC16F676, the variation in voltage situation of storage battery is directly inputted among the PIC16F676 by this port, and the position of each input port of PIC16F676 can be changed by its inner control program.