CN203151833U - LED control system based on human body sensing - Google Patents

Abstract

The utility model discloses an LED control system based on human body sensing, which comprises a rectifier filter circuit, a transformer, a drive circuit, an LED lamp, a human body sensor and an illuminance transducer. The rectifier filter circuit accesses city power. Output terminals of the human body sensor and the illuminance transducer are respectively connected with a control center which controls the drive circuit through a time-delay circuit. The human body sensor and the illuminance transducer control the LED lamp to turn on and off through the control center and enable the LED lamp to be turned on when the environment light is dim and human beings is present, therefore, the energy is saved.

Description

A LED control system based on human body sensing

technical field

The utility model relates to the technical field of lighting, in particular to an LED control system based on human body sensing.

Background technique

With the increasingly serious problem of environmental pollution in the world and the increasing shortage of energy, energy conservation and emission reduction are vigorously advocated in various parts of the world and in various fields to alleviate the severity of environmental pollution and the dilemma of increasing energy shortage.

my country also vigorously advocates energy conservation, emission reduction, and an environment-friendly economy. In the field of lighting, it strongly advocates green lighting and encourages the promotion of green energy-saving products. Traditional lighting incandescent lamps consume high energy and have been gradually replaced by low-energy LED lamps. Compared with traditional incandescent lamps, LED lights can save considerable energy consumption, but the long-bright LED lights with manual switches also have a certain waste in application. After turning on the LED lights, people sometimes forget to turn off the switch manually when they leave, resulting in waste. In response to this problem, researchers have proposed non-manual switch LED lights such as "voice-activated switch LED lights" and "light-controlled switch LED lights". However, the "voice-activated switch LED light" is not suitable for application in some occasions. For example, when it is applied in the corridor of a residential area, when the LED light is turned on by making a sound in various ways, the sound will affect the surrounding neighbors and cause certain troubles to the neighbors. , Therefore, the application of "voice-activated switch LED lights" has certain limitations. The "light control switch LED light" turns on when it senses that the light in the surrounding environment is dark, but when no one is around, even if the light in the surrounding environment is dim, there is no need to turn on the LED light, and the "light control switch LED light" also causes unnecessary waste. Moreover, the existing LED lamps all have constant power output, and the brightness of the output light cannot be changed with the change of the ambient brightness. When the light in the surrounding environment is slightly dark, the output power of the LED light is required to be small, which can meet the lighting needs. If the LED light has a high brightness and the light is too strong at this time, it is easy to cause discomfort to the human eye and cause a certain amount of waste. , When the light in the surrounding environment is very dark, the LED lights need to output a larger power to meet the lighting needs.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, provide an LED control system based on human body sensing, reduce energy consumption, and realize energy saving.

The purpose of this utility model is achieved through the following technical solutions: a LED control system based on human body sensing, including a rectification filter circuit, a transformer, a drive circuit and an LED lamp connected in series in sequence, wherein the rectification filter circuit is connected to the mains , also includes a human body sensor and an illumination sensor, the output terminals of the human body sensor and the illumination sensor are both connected to the control center, and the control center controls the driving circuit through a delay circuit.

Preferably, the human body sensor is an infrared sensor.

Preferably, the infrared sensor is a pyroelectric sensor.

Preferably, the control center also controls the drive circuit through a PWM circuit.

Preferably, the control center is a single-chip microcomputer.

The city power is input to the drive circuit through the rectification filter circuit and the transformer to provide power for the drive circuit. The illuminance sensor senses the brightness of the surrounding environment and inputs the brightness information to the control center. The human body sensor senses whether there are people in the surrounding environment and inputs the sensing information to Control center, the control center starts the driving circuit through the delay circuit and turns on the LED light when the ambient brightness is low and there are people at the same time, and at the same time the control center controls the output signal of the PWM circuit according to the brightness information input by the illuminance sensor, thereby controlling the output of the driving circuit The duty cycle of the signal, and then adjust the brightness of the LED light.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The human body sensor and illuminance sensor control the turning on or off of the LED lights through the control center, so that the LED lights are turned on only when the surrounding environment is dark and there are people present. The brightness of the surrounding environment is relatively dark, but the waste caused by still turning on the LED lights when no one exists, achieves the purpose of energy saving.

(2) The control center also controls the driving circuit through the PWM circuit to match the brightness of the LED lamp with the brightness of the surrounding environment, so as to avoid the brightness of the light being too small, which cannot meet the lighting requirements, or excessive brightness causing unnecessary waste and giving people Eyes bring discomfort, and further achieve the purpose of energy saving.

Description of drawings

Fig. 1 is the schematic block diagram of the circuit of the utility model embodiment.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation mode of the utility model is not limited thereto.

Example 1

As shown in Figure 1, an LED control system based on human body sensing includes rectification and filtering circuits, transformers, drive circuits and LED lights connected in series in sequence, where the rectification and filtering circuits are connected to the mains, and include infrared sensors and illuminance sensors , the output terminals of the infrared sensor and the illuminance sensor are both connected to the control center, and the control center controls the driving circuit through a delay circuit and a PWM circuit.

In this embodiment, the infrared sensor is a pyroelectric sensor, and the control center is a single-chip microcomputer.

The mains power is input to the drive circuit through the rectification filter circuit and the transformer to provide power for the drive circuit. The illuminance sensor senses the brightness of the surrounding environment and inputs the brightness information to the control center. Input to the control center, the control center starts the drive circuit through the delay circuit and turns on the LED light when the ambient brightness is small and there are people at the same time, and at the same time the control center controls the output signal of the PWM circuit according to the brightness information input by the illuminance sensor, thereby controlling the drive The duty cycle of the output signal of the circuit, and then adjust the luminous brightness of the LED lamp.

When the pyroelectric sensor senses that no one exists in the surrounding environment, the control center controls the delay circuit to delay the preset time. In practical applications, according to actual needs, adjust the parameters of the corresponding components in the delay circuit to obtain the corresponding delay time.

When this system is used in parking lots, long corridors and other occasions that require multiple LED lights, one control center can control multiple LED lights separately, and each LED light corresponds to its corresponding pyroelectric sensor, illuminance sensor, and delay circuit drive. circuit and PWM circuit. This system saves energy and reduces emissions, and has a wide range of applications.

The above-mentioned embodiments only express the implementation manner of the present utility model, and its description is relatively specific and detailed, but it should not be interpreted as limiting the patent scope of the present utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. LED control system based on human sensing, comprise the current rectifying and wave filtering circuit, transformer, drive circuit and the LED lamp that are connected in series successively, wherein current rectifying and wave filtering circuit inserts civil power, it is characterized in that: also comprise human body sensor and illuminance transducer, the output of described human body sensor and illuminance transducer all is connected with control centre, and control centre controls drive circuit by delay circuit.

2. according to the described LED control system based on human sensing of claim 1, it is characterized in that: described human body sensor is infrared sensor.

3. according to the described LED control system based on human sensing of claim 2, it is characterized in that: described infrared sensor is pyroelectric sensor.

4. according to the described LED control system based on human sensing of claim 1, it is characterized in that: described control centre is also by pwm circuit control drive circuit.

5. according to each described LED control system based on human sensing of claim 1 to 4, it is characterized in that: described control centre is single-chip microcomputer.

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