CN201690650U - Wireless control system used for LED dimming - Google Patents

Abstract

The utility model discloses a wireless control system for dimming light-emitting diodes. The system includes: a host computer, a wireless communication module, and at least one LED control module; The communication module sends wirelessly to the designated LED control module; each LED control module is connected to an LED light source, which is used to convert the dimming control signal into a PWM waveform to adjust the brightness of the LED light source connected to it ; The wireless communication module is used to realize the wireless communication between the upper computer and the LED control module. By adopting the wireless control system for dimming light-emitting diodes described in the embodiment of the present invention, it is possible to flexibly and conveniently control the dimming of LED light sources.

Description

A wireless control system for light-emitting diode dimming

technical field

The utility model relates to the technical field of LED dimming control, in particular to a wireless control system for light-emitting diode dimming.

Background technique

At present, my country's power energy is relatively tight, and the stock of coal resources is limited. Many areas are prone to power supply shortages during peak periods of electricity consumption. Lighting power consumption accounts for 20% of my country's power consumption, so doing a good job in energy saving in lighting power consumption can effectively save power resources.

LED (Light Emitting Diode, light emitting diode) is a semiconductor device that can directly convert electricity into visible light. LEDs were first used in the display of indicator lights, numbers and text. With the advent of white LEDs, LEDs have a low operating voltage. With the advantages of less power consumption, high luminous efficiency and long life, LED light sources are more and more widely used in the field of general lighting. LED light source is a light-emitting device that is both energy-saving and environmentally friendly. Compared with traditional light sources, LED lights save 80% of electricity than incandescent lamps and 50% of electricity than fluorescent lamps.

The existing LED dimming control systems are generally wired control systems. In the existing LED dimming wired control system, a large number of metal cables need to be arranged, so that the arrangement of the LED light source has great limitations, inflexibility, poor scalability, and cumbersome maintenance. At the same time, the aging and scrapping of metal cables will pollute the environment and pose a considerable safety hazard to human life.

Utility model content

In view of this, the purpose of the present utility model is to provide a wireless control system for light-emitting diode dimming, which can flexibly and easily realize the control of LED light source dimming.

The embodiment of the utility model provides a wireless control system for light-emitting diode dimming, the system includes: a host computer, a wireless communication module, and at least one LED control module;

The upper computer is used to wirelessly send the dimming control signal to the designated LED control module through the wireless communication module;

Each LED control module is connected to an LED light source, and after receiving the dimming control signal, converts it into a PWM waveform to adjust the brightness of the LED light source connected to it;

The wireless communication module is used to realize the wireless communication between the upper computer and the LED control module.

Preferably, the wireless communication module is a ZigBee communication module;

The ZigBee communication module includes: a coordinator, at least one router or a terminal device; wherein,

The coordinator is connected to the host computer for receiving the dimming control signal and sending it wirelessly to a router and/or terminal device designated by the host computer;

Each of the routers and/or terminal devices is connected to one LED control module for sending the received dimming control signal to the connected LED control module.

Preferably, the router is directly connected to the LED control module;

or,

The router is connected to the LED control module through a lower-level device.

Preferably, the router is connected to at least one of the lower-level devices;

The subordinate device is a terminal device or a router.

Preferably, the dimming control signal sent by the host computer includes the information of the designated LED light source.

Preferably, the coordinator assigns a network number to each router or terminal device;

The coordinator identifies the dimming control signal, determines the network number of the router or terminal device corresponding to the LED light source specified by the dimming control signal, and sends the dimming control signal to the network in wireless form number corresponding to the router or terminal device.

Preferably, the coordinator stores a one-to-one correspondence between the network number of each router or terminal device and its corresponding LED light source.

Preferably, the LED control module includes: a single-chip microcomputer and an LED driving unit;

The single-chip microcomputer is connected to the wireless communication module for receiving the dimming control signal, converting it into a corresponding PWM waveform, and outputting it to the LED drive unit;

The LED driving unit is used for adjusting the brightness of the LED light source according to the PWM waveform.

Preferably, the ZigBee communication module implements communication with the single-chip microcomputer in a serial communication mode.

Preferably, the ZigBee communication module adopts a serial port communication mode to realize communication with the host computer

According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:

In the embodiment of the utility model, the wireless communication module is used to realize the wireless communication between the upper computer and the LED control module, thereby realizing the wireless control of the LED light source. Compared with the existing technology, there is no need to arrange metal cables, so that the layout of LED light sources has great flexibility and good scalability; it also saves the maintenance work on metal cables, making the maintenance of LED power supply easier ; At the same time, it solves the problem of pollution to the environment and potential safety hazards for human life due to the aging and scrapping of metal cables.

Description of drawings

Fig. 1 is a structural diagram of a wireless control system for light-emitting diode dimming according to an embodiment of the present invention;

Fig. 2 is the structural diagram of the wireless communication module of the utility model embodiment;

Fig. 3 is the circuit diagram of the wireless communication module of the utility model embodiment;

Fig. 4 is the circuit diagram of the single-chip microcomputer of the utility model embodiment;

FIG. 5 is a circuit diagram of an LED driving unit according to an embodiment of the present invention.

Detailed ways

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In view of this, the purpose of the present utility model is to provide a wireless control system for dimming light-emitting diodes, which can flexibly and easily realize the dimming control of LED light sources.

Referring to FIG. 1 , it is a structural diagram of a wireless control system for light-emitting diode dimming according to an embodiment of the present invention. The system includes: a host computer 10 , a wireless communication module 20 , and at least one LED control module 30 .

Wherein, the upper computer 10 is used for sending the dimming control signal to the designated LED control module 30 in a wireless form through the wireless communication module 20 .

Each LED control module 30 is connected to an LED light source 40 for converting the dimming control signal into a PWM waveform to adjust the brightness of the LED light source 40 connected to it to realize the dimming control of the LED light source.

It should be noted that the structure of each LED control module 30 is the same, including a single chip microcomputer 301 and an LED driving unit 302 .

Wherein, the single-chip microcomputer 301 is connected with the wireless communication module 20 for receiving the dimming control signal, converting it into a corresponding PWM waveform, and outputting it to the LED driving unit 302 .

The LED driving unit 302 is used for driving the LED light source 40 to adjust light according to the PWM waveform.

Wherein, the wireless communication module 20 is used to realize the wireless communication between the host computer 10 and the single-chip microcomputer 30 .

In the embodiment of the utility model, the wireless communication module is used to realize the wireless communication between the upper computer and the LED control module, thereby realizing the wireless control of the LED light source. Compared with the existing technology, there is no need to arrange metal cables, so that the layout of LED light sources has great flexibility and good scalability; it also saves the maintenance work on metal cables, making the maintenance of LED power supply easier ; At the same time, it solves the problem of pollution to the environment and potential safety hazards for human life due to the aging and scrapping of metal cables.

Specifically, in the embodiment of the present utility model, the wireless communication module 20 can be realized by a ZigBee communication module. Among them, ZigBee is a wireless communication technology with short distance, low power consumption, low transmission rate, low complexity and low cost, mainly used in the fields of automatic intelligent control, sensing, monitoring and remote control in industry and home. ZigBee also has the advantage of large network capacity, a ZigBee network can include up to 65535 network nodes. The ZigBee communication module can be embedded in electronic equipment, and supports geographic location function at the same time.

Referring to FIG. 2 , it is a structural diagram of a wireless communication module according to an embodiment of the present invention. As shown in FIG. 2 , the wireless communication module 20 is realized by a ZigBee communication module. The wireless communication module 20 includes: a coordinator 201 , at least one router 202 or a terminal device 203 .

The coordinator 202 of the ZigBee communication module establishes a wireless network, and realizes wireless communication with the router 202 and/or the terminal device 203 through the wireless network.

Wherein, the coordinator 201 is connected with the host computer 10 for receiving the dimming control signal sent by the host computer 10 and sending it wirelessly to the router 202 and/or the terminal device 203 designated by the host computer 10 . Each router 202 and/or terminal device 203 is connected to one LED control module 30 for sending the received dimming control signal to the connected LED control module 30 .

In the ZigBee communication module described in the embodiment of the present invention, only one coordinator 201 is needed to realize the communication with the upper computer 10 .

After the coordinator 201 is powered on and initialized, it actively establishes a wireless network and waits for the router 202 and/or terminal device 203 to join. The coordinator 201 can realize wireless communication with the router 202 and/or the terminal device 203 joining the wireless network through the wireless network.

Specifically, the ZigBee communication module may include a multi-router 202 and/or a terminal device 203 . Each router 202 and terminal device 203 can be used to connect one LED control module 30 to realize wireless control of one LED light source 40 .

Wherein, the terminal device 203 is an end node, which can only be directly connected to the LED control module 30 , and outputs the received dimming control signal to the LED control module 30 connected thereto.

The router 202 can be directly connected to the LED control module 30, or can be connected to the LED control module 30 through a lower-level device, allowing its lower-level devices to join the wireless network.

When the router 202 is directly connected to the LED control module 30 , the router 202 directly outputs the received dimming control signal to the LED control module 30 connected thereto.

When the router 202 is connected to the LED control module 30 through a lower-level device, the router 202 outputs the received dimming control signal to the LED control module 30 connected to it through the lower-level device.

Specifically, each of the routers 202 can be connected to at least one lower-level device, and each lower-level device is connected to one LED control module 30 to realize wireless control of one LED light source 40 .

Specifically, the lower-level device may be a terminal device or a router. The router as a lower-level device has the same function as the upper-level router, and can be directly connected to the LED control module 30 or connected to the LED control module 30 through a lower-level device.

It should be noted that, in the system described in the embodiment of the present invention, the communication between the coordinator 201 of the ZigBee communication module and the router 202 and/or terminal device 203 is identified by a network number.

Specifically, in the ZigBee communication module, when the router 202 or the terminal device 203 applies to join the wireless network, the coordinator 201 will correspondingly allocate a network number for each router 202 or terminal device 203 that accesses the wireless network; For the subordinate devices of the router 202, when the subordinate devices of the router 202 apply to join the wireless network, the coordinator 201 will correspondingly assign a network number to each subordinate device of the router 202 joining the wireless network.

At this time, correspondingly, the dimming control signal sent by the host computer 10 includes the information of the designated LED light source 40 . The coordinator 201 will identify the dimming control signal received from the host computer 10, and determine which LED light source 40 is designated to be controlled by the dimming control signal. According to the router 202 or terminal device 203 corresponding to the LED light source 40 network number, and send the dimming control signal to the corresponding router 202 or terminal device 203 .

Specifically, it can be known from the above that each router 202 or terminal device 203 is connected to one LED light source 40 through one LED control module 30 respectively. Therefore, it can be said that each router 202 or terminal device 203 corresponds to one LED light source 40 . A one-to-one correspondence between the network number of each router 202 or terminal device 203 and the corresponding LED light source 40 is established, and stored in the coordinator 201 .

The coordinator 201 can determine the network number corresponding to the LED light source 40 according to the information of the LED light source 40 contained in the dimming control signal and the corresponding relationship, and identify the router 202 or the terminal device 203 corresponding to the network number .

It should be noted that, in the embodiment of the present utility model, the ZigBee communication module receives the dimming control signal from the upper computer 10 through serial port communication, and transmits the dimming control signal to the LED through the wireless network in the form of serial port communication. The control module 30 realizes the function of dimming the LED light source 40 .

In the embodiment of the utility model, the ZigBee communication module is used to realize the wireless communication between the upper computer and the LED control module, thereby realizing the wireless control of the LED light source. Therefore, by utilizing the advantages of low power consumption, flexible application and good expansibility of the ZigBee communication module, the dimming control of the LED light source can be realized flexibly and easily.

Referring to FIG. 3 , it is a circuit diagram of a wireless communication module according to an embodiment of the present invention. The wireless communication module 20 shown in FIG. 3 adopts a ZigBee communication module, specifically the wireless communication module HT-MDL-Z-EM-2400-001-AC-V1.3.0 of Huali Company. Of course, in the embodiment of the utility model, only the ZigBee communication module shown in FIG. 3 is taken as an example for illustration, and in other embodiments of the utility model, other chips can also be used as the ZigBee communication module.

As shown in Figure 3, the SIF_LOADB (port 28) of the ZigBee communication module is grounded through the eighth capacitor C8; its ports 27, 25, 23, 21 are grounded together; its ports 13, 15, 17 are connected to the power supply VCC; wherein, the port 21 and port 17 are connected through the ninth capacitor C9.

Its RXD (port 20 ) and TXD (port 18 ) are its serial output ports, which are used to connect to the serial input port of the single-chip microcomputer 301 in the LED control module 30 .

Referring to FIG. 4 and FIG. 5 , they are the circuit diagrams of the single-chip microcomputer and the LED driving unit of the embodiment of the present invention, respectively.

As shown in Figure 4, PD1 (port 31) and PD0 (port 30) of described single-chip microcomputer 301 are its serial input port, are used to connect the serial output port of ZigBee communication module; PB1 (port 13) of described single-chip microcomputer 301 ) is a PWM output port for outputting PWM waveforms to the LED driving unit 302 .

Wherein, the peripheral circuit of the single-chip microcomputer 301 shown in FIG. 4 is a conventional design, and will not be repeated here.

As shown in FIG. 5 , the LED driving unit 302 is substantially a typical BUCK (step-down converter) circuit. The LED driving circuit 302 includes a dimming chip and its peripheral DC/DC conversion circuit.

Wherein, in the LED driving unit 302 shown in FIG. 5 , an LM3409HV chip is used as the dimming chip. The enabling port EN (port 3) of the LM3409HV is connected to the PWM output port of the single-chip microcomputer 301 to receive the PWM waveform output by the single-chip microcomputer 302 . The PGATE (port 6) of the LM3409HV is connected to the base of the switching tube Q1 for controlling the switching on and off of the switching tube Q1.

According to common knowledge in the field, the LED light source 40 is driven by a constant current, and when the current flowing through the LED power source 40 changes, the output brightness of the LED light source 40 will change.

The LED driving unit 302 controls the turn-on and turn-off time of the switching device in the DC/DC conversion circuit through the output of the dimming chip, thereby adjusting the duty cycle of the PWM waveform to change, and changing the current of the LED light source 40 . Thus, the purpose of dimming the LED light source 40 is achieved.

It should be noted that, in the embodiment of the utility model, when performing serial port communication, it is necessary to ensure that the communication modes of the serial port of the ZigBee communication module and the serial port of the single-chip microcomputer are consistent, such as baud rate, frame format, etc. In the programming of the single-chip microcomputer, the serial port communication module must first be initialized, its baud rate and frame format must be set, and the input and output of its I/O port must be set simultaneously.

A wireless control system for light-emitting diode dimming provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the utility model. The description of the above examples is only It is used to help understand the method of the utility model and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and application scope. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (10)

1. A wireless control system for light-emitting diode dimming, characterized in that the system includes: a host computer, a wireless communication module, and at least one LED control module; The upper computer is used to wirelessly send the dimming control signal to the designated LED control module through the wireless communication module; Each LED control module is connected to an LED light source, and after receiving the dimming control signal, converts it into a PWM waveform to adjust the brightness of the LED light source connected to it; The wireless communication module is used to realize the wireless communication between the upper computer and the LED control module. 2. The wireless control system for light-emitting diode dimming according to claim 1, wherein the wireless communication module is a ZigBee communication module; The ZigBee communication module includes: a coordinator, at least one router or a terminal device; wherein, The coordinator is connected to the host computer for receiving the dimming control signal and sending it wirelessly to a router and/or terminal device designated by the host computer; Each of the routers and/or terminal devices is connected to one LED control module for sending the received dimming control signal to the connected LED control module. 3. The wireless control system for light-emitting diode dimming according to claim 2, characterized in that, The router is directly connected to the LED control module; or, The router is connected to the LED control module through a lower-level device. 4. The wireless control system for light-emitting diode dimming according to claim 3, wherein the router is connected to at least one of the lower-level devices; The subordinate device is a terminal device or a router. 5 . The wireless control system for dimming light-emitting diodes according to claim 2 , wherein the dimming control signal sent by the host computer includes the information of the designated LED light source. 6 . 6. The wireless control system for light-emitting diode dimming according to claim 5, wherein the coordinator assigns a network number to each router or terminal device; The coordinator identifies the dimming control signal, determines the network number of the router or terminal device corresponding to the LED light source specified by the dimming control signal, and sends the dimming control signal to the network in wireless form number corresponding to the router or terminal device. 7. The wireless control system for light-emitting diode dimming according to claim 6, characterized in that, the coordinator stores the network number of each router or terminal device, and the corresponding LED light source respectively. one-to-one correspondence. 8. The wireless control system for light-emitting diode dimming according to claim 2, wherein the LED control module comprises: a single-chip microcomputer and an LED drive unit; The single-chip microcomputer is connected to the wireless communication module for receiving the dimming control signal, converting it into a corresponding PWM waveform, and outputting it to the LED drive unit; The LED driving unit is used for adjusting the brightness of the LED light source according to the PWM waveform. 9 . The wireless control system for dimming light-emitting diodes according to claim 8 , wherein the ZigBee communication module uses a serial communication mode to communicate with the single-chip microcomputer. 10. The wireless control system for dimming light-emitting diodes according to claim 2, wherein the ZigBee communication module uses a serial communication mode to communicate with the upper computer.

Images