CN105764186A - LED lamp energy-saving control system - Google Patents

Abstract

The invention relates to an energy-saving control system for LED lamps, which includes a power supply module, an LED drive module, an environmental sensing module, a control module and an LED lamp. The power supply module supplies power to the entire control system. The terminal is connected to the LED driver module, and the LED driver module is connected to the LED lamp; the LED driver module drives the LED lamp by the control signal output by the control module, and the core component of the environmental sensing module is a photoresistor, which collects the ambient brightness signal of the LED lamp and transmits it. To the control module, the control module includes a microprocessor and a sampling circuit, and outputs a control signal after processing the signal sent by the environment sensing module. The LED lamp energy-saving control system has a simple circuit, saves electric energy to a large extent, and prolongs the service life of the LED lamp. The whole system achieves the effect of intelligence and energy saving, and improves the lighting environment. Its stable brightness adjustment method makes LED lighting safer and more comfortable, and has great application value.

Description

An energy-saving control system for LED lamps

technical field

The invention relates to the technical field of LED lighting, in particular to an energy-saving control system for LED lamps.

Background technique

The current huge energy consumption and the resulting energy shortage and price rise have made energy saving a very urgent task. A large part of the energy consumed by countries is used for lighting. At present, most lighting management systems in China are still using traditional control methods such as simple light control and clock control. These systems generally have the limitations of being difficult to feed back the operating status information of the lights and remote control. They basically have no power-saving effect, and the traditional manual operation not only makes the task of the management department heavy, but also increases the cost of operation and maintenance.

LED lighting is also called solid-state lighting. As the third-generation lighting technology after incandescent lamps and fluorescent lamps, it has the characteristics of energy saving, environmental protection, safety and reliability. Represents the future of lighting technology. The development of new solid-state lighting is not only a revolution in the field of lighting, but also meets the requirements of "building a resource-saving and environment-friendly society" put forward by the current government. However, in practical applications, it is found that the LED lamp still emits light at the same power when the surrounding brightness is high, and there is a waste of electric energy. Therefore, it is particularly important to develop energy-saving technology for LED lamps.

LED lights have many advantages such as small size, low power consumption, long life, non-toxic and environmental protection. The brightness of the LED light is determined by the current through the LED light. To change the current through the two sections of the LED light, PWM dimming technology can be used. The basic idea of the PWM method is to use the PWM port of the single-chip microcomputer, without changing the PWM square wave Under the premise of the cycle, the PWM control register of the microcontroller is adjusted by software to adjust the PWM duty cycle, thereby controlling the current size.

Through PWM dimming technology, the brightness of LED lights can be changed to save energy. However, the existing dimming technology to change the brightness of LED lamps is not perfect, and the influence of various factors has not been fully considered. The brightness change of the LED lamp is too violently affected by external factors, and the change is rapid, and the damage to the human eye caused by the drastic brightness change is not considered; there is also the fact that the brightness change of the LED lamp is greatly affected by the environment, and there is no limit to the brightness change of the LED lamp. range, resulting in greatly reduced LED lamp life and unnecessary waste of energy.

Contents of the invention

In view of the defects existing in the prior art, the object of the present invention is to provide an LED lamp energy-saving control system, which enables the LED lamp to change the luminosity with the change of the ambient brightness, and achieves the energy-saving effect based on human needs.

In order to solve the above problems, the present invention adopts the following technical solutions:

An energy-saving control system for LED lamps, including a power supply module, an LED drive module, an environment sensing module, a control module and an LED lamp, the power supply module supplies power to the entire control system, the environment sensing module is connected to the control module, and the The output terminal of the control module is connected with the LED driver module, and the LED driver module is connected with the LED lamp; the LED driver module drives the LED lamp by the control signal output by the control module, and the core component of the environment sensing module is a photoresistor Collecting the ambient brightness signal of the LED lamp and sending it to the control module, the control module includes a microprocessor and a sampling circuit, processes the signal sent by the environment sensing module and outputs a control signal.

The microprocessor of the control module adopts STC15F2K60S2.

The environmental sensing module uses a photosensitive controller PS-001, which automatically adjusts the voltage and pulse width modulation signal (PWM) according to the light intensity.

The input and output signals of the control module are processed by filtering, so that the collected and output signals are more stable, and the brightness of the LED light is adjusted to change slowly instead of abruptly, so as to prolong the service life of the LED light. It quickly leads to constant changes in the brightness of LED lights, adapting to the adjustment ability of the human eye and meeting the needs of humanization.

The environmental sensing module, that is, the photosensitive controller PS-001, can set the light intensity output mode, including four parameters of "light intensity lower limit", "light intensity upper limit", "correction coefficient" and "output interval time" to limit and adjust The brightness of the LED light changes to reduce the influence of external interference. Save more energy and prolong the service life of LED lights.

Compared with the prior art, the present invention has the following prominent substantive features and significant advantages:

1. The control system of the present invention adopts STC15F2K60S2 single-chip microcomputer, which greatly enhances the anti-interference ability of the whole system, and has low voltage, low power consumption, and fast signal processing speed.

2. The software design in the control system of the present invention adopts the filtering form to process the obtained input and output signals, which alleviates the oscillation of the signal, eliminates useless signals, makes the collected and output signals more stable, and achieves the slow change of the brightness of the LED lamp instead of The purpose of sudden change is to prolong the service life of LED lights.

3. The software design in the control system of the present invention adopts a time-delay control mode, so that the brightness change of the LED driver module to adjust the lamp is adapted to the adjustment ability of human eyes, and meets the needs of humanization.

4. The control system of the present invention adopts the photosensitive controller PS-001, and the light intensity output mode can be set in the software design, including four types of "lower limit of light intensity", "upper limit of light intensity", "correction coefficient" and "output interval time" Parameters to limit and adjust the brightness changes of LED lights to reduce the influence of external interference.

Description of drawings

Fig. 1 is a general block diagram of the LED lamp energy-saving control system of the present invention.

Fig. 2 is a design principle diagram of the LED lamp energy-saving control system of the present invention.

detailed description

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2, an LED lamp energy-saving control system includes a power supply module, an LED driver module, an environment sensing module, a control module and an LED lamp, the power supply module supplies power to the entire control system, and the environment sensing module The sensor module is connected with the control module, the output terminal of the control module is connected with the LED driver module, and the LED driver module is connected with the LED lamp; the LED driver module drives the LED lamp by the control signal output by the control module, and the environment The core component of the sensor module is a photoresistor, which collects the ambient brightness signal of the LED lamp and sends it to the control module. The control module includes a microprocessor and a sampling circuit, which processes the signal sent by the environment sensor module and outputs a control signal.

The microprocessor of the control module adopts STC15F2K60S2.

The environmental sensing module adopts a photosensitive controller PS-001, which automatically adjusts the voltage and pulse width modulation signal according to the light intensity.

The input and output signals of the control module are processed by filtering, so that the collected and output signals are more stable, and the brightness of the LED light is adjusted to change slowly instead of abruptly, so as to prolong the service life of the LED light. It quickly leads to constant changes in the brightness of LED lights, adapting to the adjustment ability of the human eye and meeting the needs of humanization.

Working process of the present invention is as follows:

After the entire control system is powered on, the main program in the control system first initializes the internal and external resources of the microcontroller, and then calls each function module in turn. The A/D sampling program is cyclically called by the main program, which converts the analog signal collected by the photosensitive controller into a digital signal, and after digital filtering, it is sent to the data buffer for other programs to call. When the system controller receives the command, the internal control register is set, and the programmable counter array (PCA)/PWM is started to work, and the adjustable PWM is output to realize the dimming function. By setting the delay function through the program, the control information output by the control module is delayed, so that the LED driver module can delay the action, and avoid the frequent actions of the control system caused by the drastic changes in the brightness of the surrounding environment of the LED light, causing the LED light to flicker. Set the four parameters of photosensitive controller PS-001 "light intensity lower limit", "light intensity upper limit", "correction coefficient", "output interval time" and the upper and lower limits of light intensity and output control signal amplitude (voltage or duty) by software The corresponding relationship between the upper and lower limits of the ratio) is set to negative correlation in this example to ensure the stable, safe and efficient work of the LED lamp.

Claims (4)

1. A kind of LED lamp energy-saving control system, it is characterized in that: comprise power supply module, LED drive module, environment sensing module, control module and LED lamp, described power supply module supplies power to whole control system, described environment sensing module and The control module is connected, the output terminal of the control module is connected with the LED driver module, and the LED driver module is connected with the LED lamp; the LED driver module drives the LED lamp by the control signal output by the control module, and the environment sensing module Its core component is a photoresistor, which collects the ambient brightness signal of the LED lamp and sends it to the control module. The control module includes a microprocessor and a sampling circuit, and outputs a control signal after processing the signal sent by the environment sensing module. 2. The LED lamp energy-saving control system according to claim 1, wherein the microprocessor of the control module is STC15F2K60S2. 3. The LED lamp energy-saving control system according to claim 1, wherein the environment sensing module adopts a photosensitive controller PS-001 to automatically adjust the voltage and pulse width modulation signal according to the light intensity. 4. The LED lamp energy-saving control system according to claim 1, characterized in that: the input and output signals of the control module are processed by filtering, so that the collected and output signals are more stable, and the brightness of the LED lamp is adjusted to change slowly instead of abruptly. Change, prolong the service life of LED lights; use delay control to avoid the constant change of LED light brightness caused by too fast changes in the surrounding environment, adapt to the adjustment ability of human eyes, and meet the needs of humanization.