CN203352899U - LED dimming lamp - Google Patents

Abstract

The utility model discloses an LED dimming lamp, which is composed of a control circuit, an optocoupler isolation circuit, a drive circuit and an LED lamp. The control circuit includes a ZigBee module, and an infrared sensor module and a power supply module are respectively connected to the ZigBee module. The power module converts DC5V into DC3.3V, among which DC5V provides working power for the infrared sensor module, DC3.3V provides working power for the ZigBee module and optocoupler isolation circuit, and the PWM signal sent by the control circuit is connected after passing through the optocoupler isolation circuit A drive circuit, the optocoupler isolation circuit isolates the PWM signal, and the drive circuit is a constant current drive control module. The utility model has simple circuit, strong reliability, green energy saving and environmental protection. On this basis, the underground parking lot is networked, which not only solves the problems of serious energy consumption of the light source in the underground parking lot and unreasonable control mode, but also greatly improves the underground parking lot. Field management efficiency, strong scalability, good social benefits and application prospects.

Description

A kind of LED dimming lamp

technical field

The utility model relates to the field of automatic control, in particular to an LED dimming lamp.

Background technique

my country has a large population and limited resources, many of which are non-renewable. The contradiction between the current shortage of resources and the rapid economic development has become increasingly prominent, which has become one of the bottlenecks restricting the sustainable development of the economy. Excessive consumption and waste of energy is an urgent problem to be solved. Therefore, it is urgent to improve energy utilization, reduce total energy consumption, reduce carbon emissions, and establish a harmonious green society. the

At present, incandescent lamps are mostly used as light sources in underground parking lots, which have a short lifespan and high power consumption, and use 24-hour continuous power supply, resulting in a lot of energy waste. In order to reduce power consumption, some parking lots adopt partition control, which greatly affects Improve the lighting quality of the underground parking lot. The LED light source has the characteristics of high luminous efficiency, low power consumption, long life, and good shock resistance. If it is used in an underground parking lot, it will not only save a lot of energy, but also greatly extend the service life of the lighting equipment in the parking lot. What's more, it can effectively use its easy-to-dimming feature to carry out intelligent lighting control for underground parking lots, which has a good application prospect.

Contents of the invention

Aiming at the current problems of high energy consumption and unreasonable control methods of lighting facilities in underground parking lots, combined with the easy dimming characteristics of LED light sources, the purpose of this utility model is to provide an LED dimming lamp. The dimming lamp is based on TI's With CC2530 as the core, the following functions are realized:

(1) Networking of lamps: any LED dimming lamp can be used as a sub-node of the ZigBee network in the underground parking lot to realize communication with the coordinator. The state is uploaded to the coordinator.

(2) Energy-saving lighting: When there is no movement of people (vehicles) or no control commands, the brightness of all lamps will remain at 10% of the full brightness mode, which not only ensures the normal brightness requirements of the monitoring equipment, but also maximizes the Reduced energy consumption.

(3) Intelligent follow-up lighting: When the infrared sensor detects that people (cars) are moving, the LED lamps will be changed from energy-saving mode to full-brightness mode. If there is a target moving within the detection range, the LED lamps will continue to be lit. When a person (vehicle) is detected to leave, the LED lamp enters the energy-saving mode after a delay for a period of time, and the brightness changes back to 10% of the full-brightness mode, realizing intelligent energy-saving lighting.

(4) PWM dimming: In order to avoid damage to human eyes caused by sudden changes in LED brightness, the PWM dimming method is adopted to change the average output current of the LED by adjusting the duty cycle of the PWM control signal, and isolate the PWM signal through the optocoupler , to ensure the reliability of the PWM signal, and then realize the control of the LED brightness and achieve a good visual dimming effect.

In order to achieve the above object, the technical solution adopted by the utility model is:

An LED dimming lamp is composed of a control circuit, an optocoupler isolation circuit, a drive circuit, and an LED lamp.

The control circuit includes a ZigBee module, the infrared sensor module and the power module are respectively connected to the ZigBee module, and the power module converts DC5V into DC3.3V, wherein DC5V provides working power for the infrared sensor module, and DC3.3V is the ZigBee module and Optocoupler isolation circuit provides working power,

The PWM signal sent by the control circuit is connected to the drive circuit after passing through the optocoupler isolation circuit, and the optocoupler isolation circuit isolates the PWM signal,

The drive circuit is a constant current drive control module.

Preferably, the ZigBee module uses CC2530 as a microcontroller, and the infrared sensor module detects the movement of people and vehicles within the sensing range,

When the CC2530 microcontroller receives the movement information of people and vehicles sent by the infrared sensor module or receives the dimming command, it will change the output current of the constant current drive control module by changing the duty cycle of the PWM pulse signal step by step.

Preferably, the constant current drive control module is composed of an AC/DC conversion circuit, a PFC power factor correction circuit, a DC/DC step-down circuit, and a constant current source control circuit.

The utility model has the following advantages and positive effects:

The utility model has simple circuit, strong reliability, green energy saving and environmental protection. On this basis, the underground parking lot is networked, which not only solves the problems of serious energy consumption of the light source in the underground parking lot and unreasonable control mode, but also greatly improves the underground parking lot. Field management efficiency, strong scalability, good social benefits and application prospects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural diagram of the utility model.

Fig. 2 is a schematic structural diagram of the drive circuit of the present invention.

Specific implementation

Structural principle of the present utility model, working principle are described further below.

Referring to Fig. 1, an LED dimming lamp is composed of a control circuit, an optocoupler isolation circuit, a driving circuit, and an LED lamp.

The control circuit is mainly composed of a ZigBee module Q2530RF, an infrared sensor module, and a power module. The optocoupler isolation circuit is mainly designed based on a TLP181 optocoupler, and the drive circuit is a PT4027 constant current drive control module.

The ZigBee module Q2530RF takes the CC2530 microcontroller as the core and mainly includes a radio frequency circuit and an oscillation circuit;

The infrared sensor module adopts BISS0001 pyroelectric infrared sensor, which is responsible for detecting the movement of people and vehicles within the sensing range. When a person (vehicle) moves a signal, the module output pin V0 outputs a 3.3V high-level voltage;

The power module converts DC5V into DC3.3V, wherein DC5V provides working power for BISS0001 pyroelectric infrared sensor, and 3.3V mainly provides working power for ZigBee module Q2530RF and optocoupler isolation circuit.

The PT4027 constant current drive control module is mainly composed of an AC/DC conversion circuit, a PFC power factor correction circuit, a DC/DC step-down circuit, and a constant current source control circuit.

The constant current drive control module uses a high-voltage step-down LED drive control chip PT4207. PT4207 supports PWM digital pulse dimming with low frequency variable duty cycle, and the built-in input voltage compensation function greatly improves the LED current stability under different input voltages. The output constant current has high precision, which ensures the consistency of the brightness of the LED light source.

When the CC2530 microcontroller receives the movement information of people and vehicles sent by the infrared sensor or receives the dimming command, it will gradually change the duty cycle of the PWM pulse signal to change the output current of the constant current source to achieve smooth LED brightness. adjust.

Referring to Figure 2, the optocoupler isolation circuit is mainly designed based on the TLP181GB optocoupler. Considering that if the PWM signal sent by the CC2530 microcontroller is directly sent to the DIM pin of the PT4207 chip, it may cause power interference, so the optocoupler is used to implement it. Isolation, the circuit diagram is as follows, the optocoupler pin 1 is connected to the resistor by 3.3V, the optocoupler pin 2 is connected to the PWM output pin of CC2530, the 5.87VDC of the optocoupler pin 3 comes from the 7 pin VDD of the PT4207 chip, and the pin 4 is connected to the 3 pin of the PT4207 GND is the ground of the constant current drive module.

The main advantage of optocoupler is one-way signal transmission, complete electrical isolation between input and output, strong anti-interference ability, long service life and high transmission efficiency.

The utility model has the following working modes:

(1) Energy-saving lighting mode: If the CC2530 microcontroller does not receive a human (vehicle) movement signal or dimming command, the brightness of all lamps will remain at 10% of the full-brightness mode.

(2) ZigBee wireless communication mode: When receiving the control command from the coordinator, the LED lamps will be changed from energy-saving mode to full-brightness mode, and the lamps will be transferred back to energy-saving mode after a period of delay; The working status is uploaded to the coordinator. If the coordinator does not receive the normal working status sent by the node, it indicates that the node is faulty and needs to be repaired.

(3) Intelligent follow-up lighting mode: When the infrared sensor detects that someone (vehicle) is moving, the LED lamp will change from energy-saving mode to full-brightness mode. If there is a target moving within the detection range, the LED lamp will continue to be lit. When a person (vehicle) is detected to leave, the LED lamp enters the energy-saving mode after a delay for a period of time, and the brightness changes back to 10% of the full-brightness mode, realizing intelligent energy-saving lighting.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. a LED dimming lamp, is characterized in that, by control circuit, optical coupling isolation circuit, drive circuit, LED light fixture, formed,

Described control circuit comprises the ZigBee module, the infrared inductor module is connected respectively the ZigBee module with power module, described power module is converted into DC3.3V by DC5V, wherein DC5V provides working power for the infrared inductor module, DC3.3V provides working power for ZigBee module and optical coupling isolation circuit

The pwm signal that control circuit sends, by connecting drive circuit after optical coupling isolation circuit, described optical coupling isolation circuit is isolated pwm signal,

Described drive circuit is a constant current drive control module.

2. a kind of LED dimming lamp according to claim 1, it is characterized in that: described ZigBee module be take CC2530 as microcontroller, and the infrared inductor module is detected the personnel's vehicle mobile situation in induction range,

When the CC2530 microcontroller receives people's car mobile message of infrared inductor module transmission or receives dimmer command, can recently change by the duty that changes step by step pwm pulse signal the output current of constant current drive control module.

3. a kind of LED dimming lamp according to claim 1, it is characterized in that: described constant current drive control module is comprised of AC/DC change-over circuit, PFC circuit of power factor correction, DC/DC reduction voltage circuit, constant current source control circuit.

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