Floating ground power supply inductive control system for a luminaire

Abstract

The utility model discloses a lead to the inductive control system of lead of lamp, including voltage input, voltage stabilizing circuit and singlechip U3 voltage input 12V voltage from the end of LED module, voltage stabilizing circuit includes voltage stabilizing chip U1, voltage stabilizing chip HT7550, U1 is used to power supply to singlechip U3, and sensor includes photoelectric coupler infrared transmitting tube U2A and photoelectric coupler infrared receiving tube U2B, photoelectric coupler U2A connects to the 3rd pin of singlechip U3, and photoelectric coupler U2B connects to the fourth pin of singlechip U3, and when the singlechip U3 detects that photoelectric coupler U2A and photoelectric coupler U2B are high level or low level, corresponding, the 5th pin output high level or low level of singlechip U3 and output to voltage output end. Without independent power line, can be directly connected in series in the loop of load: especially suitable for the intelligent transformation to the existing lighting circuit, increases the function such as inductive control under the condition of not changing the original wiring.

Description

Technical Field

[0001] This utility model relates to the field of lighting control circuits, and in particular to an induction control system for a lighting fixture that draws power from the ground. Background Technology

[0002] In existing lighting control circuits, there are mainly two types of switches: manual control switches and sensor control switches. However, they are generally connected in series or in parallel. When the main front-end switch only controls on / off states, and a branch needs to adjust brightness or switch color temperature settings, it requires a separate and stable constant voltage source.

[0003] When connected in series, both lights must be in a conductive state for the lights to be turned on or off. When in parallel configuration, each can control the light fixture to turn on or off independently (this needs to be defined according to the actual circuit layout, such as four wires in two circuits or three wires in two circuits).

[0004] Therefore, both of the above control methods have shortcomings. When connected in series, both switches need to be turned on, and when connected in parallel, the circuit is relatively complex. Utility Model Content

[0005] The main purpose of this utility model is to propose an inductive control system for floating power supply of lamps. The aim is to control the on / off state of LED modules by setting an improved inductive control switch in series with the manual control switch in the series circuit. That is, the on / off function of the entire circuit can be realized by the inductive control system with the power supply at the end floating.

[0006] To achieve the above objectives, this utility model proposes a floating power supply induction control system for lighting fixtures, comprising: The voltage input terminal receives a constant 12V / 24V voltage from the end of the LED module; A voltage regulator circuit, comprising a voltage regulator chip U1; The HT7550 voltage regulator chip U1 is used to power the microcontroller U3. The sensor includes an optocoupler infrared emitter U2A and an optocoupler infrared receiver U2B. Optocoupler U2A is connected to pin 3 of microcontroller U3, and optocoupler U2B is connected to pin 4 of microcontroller U3. When the microcontroller U3 detects that optocouplers U2A and U2B are at a high or low level, the corresponding pin 5 of the microcontroller U3 outputs a high or low level and outputs it to the voltage output terminal.

[0007] include: The voltage input terminal receives a constant 12V / 24V voltage from the end of the LED module. A voltage regulator circuit, comprising a voltage regulator chip U1; The microcontroller U3 is powered by the voltage regulator chip U1. The sensor includes an optocoupler infrared emitter U2A and an optocoupler infrared receiver U2B. Optocoupler U2A is connected to pin 3 of microcontroller U3, and optocoupler U2B is connected to pin 4 of microcontroller U3. When the microcontroller U3 detects that the infrared emitting tube U2A and the infrared receiving tube U2B of the optocoupler are at a high level or a low level, the corresponding pin 5 of the microcontroller U3 outputs a high level or a low level and outputs it to the voltage output terminal.

[0008] Preferably, the voltage input terminal draws power from the end of the LED module and floats to ground.

[0009] Preferably, the voltage input terminal is IN-WW or IN-CW, and the voltage output terminal is OUT-WW or OUT-CW.

[0010] Preferably, the voltage regulator chip U1 is an HT7150 linear voltage regulator LDO.

[0011] Preferably, a resistor R1 is connected in series between the voltage input terminal and the first pin of the voltage regulator chip U1; The second pin of the voltage regulator chip U1 is connected to the first pin of the microcontroller U3. A capacitor C4 is connected in series between pin 1 and pin 8 of the microcontroller U3, and pin 8 of the microcontroller U3 is connected to the ground terminal GND.

[0012] Preferably, a capacitor C2 is connected in series between pin 1 and pin 2 of the voltage regulator chip U1. A capacitor C3 is connected in series between pin 2 and pin 3 of the voltage regulator chip U1, and the capacitor C3 is grounded to GND.

[0013] Preferably, a diode D1 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D1 is connected to the drain (D) of the MOSFET Q1. A resistor R3 is connected in series between the gate (G) and drain (D) of the MOSFET Q1. The gate is connected to pin 5 of the microcontroller U3. The port (P) of the MOSFET Q1 is connected to OUT-WW. A diode D2 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D2 is connected to the drain of the MOSFET Q2. A resistor R2 is connected in series between the gate (G) and drain (D) of the MOSFET Q2. The gate is connected to pin 5 of the microcontroller U3, and the port (P) of the MOSFET Q2 is connected to OUT-CW.

[0014] Preferably, pin 2 of the voltage regulator chip U1 and pin 3 of the microcontroller U3 are connected in series and a resistor R2 is connected to them. The second pin of the voltage regulator chip U2 and the fourth pin of the microcontroller U3 are connected in series and a resistor R3 is connected to them. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler infrared emitting diode U2A, respectively. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler infrared receiver U2B, respectively. A capacitor C5 is connected in parallel to the input terminal of the optocoupler U2B, and a capacitor C4 is connected in parallel to the output terminal of the optocoupler U2B. The output terminal of the optocoupler U2B is grounded.

[0015] Preferably, the microcontroller U3 is model FT6IEC21B-RB.

[0016] Preferably, the optocoupler is a PC817 (IR infrared pair).

[0017] The advantages of this application, 1. No separate power cord is required; it can be directly connected in series in the circuit of the load (such as an LED light). 2. Notably, it can control one or multiple channels simultaneously, enabling LED load dimming or color temperature switching functions; 3. Strong compatibility: It is particularly suitable for intelligent transformation of existing lighting circuits, adding functions such as sensor control without changing the original wiring; Meanwhile, the MCU internal program executes control logic based on the sensing signal (turning on when there is no sensing and turning off when there is sensing). When a sensing signal is present: the module disconnects and the load does not work.

[0018] When there is no sensor signal: the module is on and the load is working normally. Attached Figure Description

[0019] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0020] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] like Figure 1 As shown, a floating ground power supply induction control system for a lighting fixture includes: A voltage input terminal receives a 12V voltage from the end of the LED module; A voltage regulator circuit, comprising a voltage regulator chip U1; The microcontroller U3 is powered by the voltage regulator chip U1. The sensor includes an optocoupler infrared emitter U2A and an optocoupler infrared receiver U2B. Optocoupler U2A is connected to pin 3 of microcontroller U3, and optocoupler U2B is connected to pin 4 of microcontroller U3. When the microcontroller U3 detects that the infrared emitting tube U2A and the infrared receiving tube U2B of the optocoupler are at a high level or a low level, the corresponding pin 5 of the microcontroller U3 outputs a high level or a low level and outputs it to the voltage output terminal.

[0024] The advantage of this application is that it does not require a separate power supply line and can be directly connected in series in the circuit of the load (such as an LED light); In particular, it can control one or more channels simultaneously to achieve LED load dimming or color temperature switching functions; High compatibility: It is particularly suitable for intelligent transformation of existing lighting circuits, adding functions such as sensing control without changing the original wiring; Meanwhile, the MCU internal program executes control logic based on the sensing signal (turning on when there is no sensing and turning off when there is sensing). When a sensing signal is present: the module disconnects and the load does not work.

[0025] When there is no sensor signal: the module is on and the load is working normally.

[0026] Specifically, the voltage input terminal draws power from the floating ground at the end of the LED module (but is defined by the current loop of the external circuit (IN-WW / CW). This "ground" level is floating and variable. The LED load circuit has a common positive terminal, and the LED load's negative terminal is connected in series. The ground of chips U1 and U3 is connected in series with diodes to the LED negative terminal, hence the term "floating ground". That is, a loop can be formed when one or both of the following paths (IN-WW, IN-CW; OUT-WW, OUT-CW) are conducting simultaneously.

[0027] The two 12V voltages shown in the diagram represent IN-WW and IN-CW respectively (which can be used on constant voltage LED loads, and the voltage of this circuit is determined by the voltage of this circuit: when the LED load is constant voltage 12V, it is 12V floating ground power; when the LED load is constant voltage 24V, it is 24V floating ground power).

[0028] Specifically, the voltage input terminal is IN-WW or IN-CW, and the voltage output terminal is OUT-WW or OUT-CW. IN-WW and IN-CW are two input lines, typically from a DC power supply and controlled by an external switch or dimmer. Regardless of how the external power supply is connected (in series at the end of the LED load), and regardless of which output is controlled, the current will always flow in the correct direction through one of the diodes, forming a loop.

[0029] It can control a single channel or control multiple loads simultaneously.

[0030] For example, when IN-WW is on, the current flows to +C through D1; when IN-CW is on, the current flows to +C through D2. When controlling the load at the front end, the on / off state of this circuit can be controlled. This invention allows for single or dual simultaneous conduction (IN-WW, IN-CW) from the end, enabling end-end control of the LED load. This invention allows for dimming and color temperature adjustment switching functions from the end, greatly simplifying installation.

[0031] Specifically, WW is an abbreviation for Warm White, representing warm white LED light strips; CW is an abbreviation for Cool White, representing cool white LED light strips.

[0032] Specifically, the voltage regulator chip U1 is an HT7150 linear voltage regulator LDO.

[0033] Specifically, a resistor R1 is connected in series between the voltage input terminal and the first pin of the voltage regulator chip U1; The second pin of the voltage regulator chip U1 is connected to the first pin of the microcontroller U3. A capacitor C4 is connected in series between pin 1 and pin 8 of the microcontroller U3, and pin 8 of the microcontroller U3 is connected to the ground terminal GND.

[0034] Specifically, floating ground power: the module's power supply (VCC and GND) is not directly from a fixed power source, but is obtained from the tail of the controlled load (such as an LED module). As shown in the figure, the negative terminal of the linear regulator U1 is connected to the negative output terminal of the module through a diode, thereby establishing the module's own operating voltage in the load circuit. This is suitable for controlling single or multiple LED modules and offers good system scalability.

[0035] Specifically, a capacitor C2 is connected in series between pin 1 and pin 2 of the voltage regulator chip U1. A capacitor C3 is connected in series between pins 2 and 3 of the voltage regulator chip U1, and the capacitor C3 is grounded to GND. (U1 (HT7150) is a linear regulator (LDO) responsible for stabilizing the acquired voltage at +5V, providing a clean and stable operating power supply for the microcontroller (MCU) U3.)

[0036] Specifically, a diode D1 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D1 is connected to the drain (D) of the MOSFET Q1. A resistor R3 is connected in series between the gate (G) and drain (D) of the MOSFET Q1. The gate is connected to pin 5 of the microcontroller U3. The port (P) of the MOSFET Q1 is connected to OUT-WW. A diode D2 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D2 is connected to the drain of the MOSFET Q2. A resistor R2 is connected in series between the gate (G) and drain (D) of the MOSFET Q2. The gate is connected to pin 5 of the microcontroller U3, and the port (P) of the MOSFET Q2 is connected to OUT-CW.

[0037] Diodes D1 and D2 form part of a rectifier bridge (together with external circuitry, they form a full bridge, ensuring that the module receives the correct polarity voltage regardless of how J2 is connected).

[0038] The MCU outputs control signals through one of its I / O pins (pin 5 as shown in the figure).

[0039] This pin outputs a high level when the output needs to be enabled.

[0040] This pin outputs a low level when the output needs to be turned off.

[0041] This output level controls subsequent circuitry, such as MOSFETs Q1 or Q2, which in turn controls the switching off of different colored lights. Since Q1 is a P-MOSFET, it requires a low level (gate voltage lower than source voltage) to conduct. Therefore, the control signal output from pin 5 of the MCU drives Q1 through an inverter circuit composed of Q2.

[0042] When the MCU outputs a high level (turns on the light): Q2 turns on, pulling the gate of Q1 low to GND, Q1 turns on, and the load is powered.

[0043] When the MCU outputs a low level (lights off): Q2 is cut off, the gate of Q1 is pulled up to the source voltage through the pull-up resistor, Q1 is turned off, and the load is de-energized.

[0044] This design is well-suited for smart lighting, security sensor lights, and other similar applications, adding automatic sensor control functionality while retaining the original manual switch control.

[0045] MCU intelligent control: It provides flexible logic processing capabilities and can easily realize complex functions such as delay and multi-channel sensing.

[0046] High-efficiency MOSFET switches: enable silent, long-life on / off control without mechanical contacts.

[0047] Specifically, pin 2 of the voltage regulator chip U1 and pin 3 of the microcontroller U3 are connected in series and a resistor R2 is connected to them. The second pin of the voltage regulator chip U2 and the fourth pin of the microcontroller U3 are connected in series and a resistor R3 is connected to them. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler U2A, respectively. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler U2B, respectively. A capacitor C5 is connected in parallel to the input terminal of the optocoupler U2B, and a capacitor C4 is connected in parallel to the output terminal of the optocoupler U2B. The output terminal of the optocoupler U2B is grounded.

[0048] C5 provides bias and filtering for sensor A; R2 provides bias for sensor B. These components are used to stabilize the sensor signal and prevent false triggering.

[0049] An optocoupler, also often simply called an optocoupler, is designed to transmit electrical signals between two circuits while simultaneously providing electrical isolation. It integrates a light-emitting device (input) and a light-receiving device (output) into a single chip.

[0050] Working principle: The current at the input terminal causes the light-emitting device (LED) to emit light, and the light shines on the light-receiving device (phototransistor) at the output terminal, making it conduct, thereby completing the "electric-to-light-to-electric" conversion.

[0051] Main advantages: Floating ground power: The power supply (VCC and GND) of the module does not come directly from a fixed power source, but is obtained from the tail end of the controlled load (such as LED module), realizing single or multi-channel module control, and sensing control on and off.

[0052] Specifically, the model of the microcontroller U3 is FT6IEC21B-RB.

[0053] Specifically, the optocoupler is model PC817 (i.e., IR infrared pair).

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A floating power supply induction control system for a lamp, characterized in that, include: The voltage input terminal receives a constant 12V / 24V voltage from the end of the LED module. A voltage regulator circuit, comprising a voltage regulator chip U1; The microcontroller U3 is powered by the voltage regulator chip U1. The sensor includes an optocoupler infrared emitter U2A and an optocoupler infrared receiver U2B. Optocoupler U2A is connected to pin 3 of microcontroller U3, and optocoupler U2B is connected to pin 4 of microcontroller U3. When the microcontroller U3 detects that the infrared emitting tube U2A and the infrared receiving tube U2B of the optocoupler are at a high level or a low level, the corresponding pin 5 of the microcontroller U3 outputs a high level or a low level and outputs it to the voltage output terminal.

2. The induction control system for floating ground power supply of the lamp as described in claim 1, characterized in that: The voltage input terminal draws power from the end of the LED module by floating to ground.

3. The floating ground power supply induction control system for lamps as described in claim 1, characterized in that: The voltage input terminal is IN-WW or IN-CW, and the voltage output terminal is OUT-WW or OUT-CW.

4. The floating ground power supply induction control system for lamps as described in claim 1, characterized in that: The voltage regulator chip U1 is an HT7150 linear voltage regulator LDO.

5. The floating ground power supply induction control system for lamps as described in claim 1, characterized in that: A resistor R1 is connected in series between the voltage input terminal and pin 1 of the voltage regulator chip U1; The second pin of the voltage regulator chip U1 is connected to the first pin of the microcontroller U3. A capacitor C4 is connected in series between pin 1 and pin 8 of the microcontroller U3, and pin 8 of the microcontroller U3 is connected to the ground terminal GND.

6. The induction control system for floating ground power supply of the lamp as described in claim 1, characterized in that: A capacitor C2 is connected in series between pin 1 and pin 2 of the voltage regulator chip U1. A capacitor C3 is connected in series between pin 2 and pin 3 of the voltage regulator chip U1, and the capacitor C3 is grounded to GND.

7. The induction control system for floating ground power supply of the lamp as described in claim 2, characterized in that: A diode D1 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D1 is connected to the drain (D) of the MOSFET Q1. A resistor R3 is connected in series between the gate (G) and drain (D) of the MOSFET Q1. The gate is connected to pin 5 of the microcontroller U3. The port (P) of the MOSFET Q1 is connected to OUT-WW. A diode D2 is connected in series at pin 3 of the voltage regulator chip U1, and the other end of the diode D2 is connected to the drain of the MOSFET Q2. A resistor R2 is connected in series between the gate (G) and drain (D) of the MOSFET Q2. The gate is connected to pin 5 of the microcontroller U3, and the port (P) of the MOSFET Q2 is connected to OUT-CW.

8. The induction control system for floating ground power supply of the lamp as described in claim 2, characterized in that: The second pin of the voltage regulator chip U1 and the third pin of the microcontroller U3 are connected in series and a resistor R2 is connected to them. The second pin of the voltage regulator chip U2 and the fourth pin of the microcontroller U3 are connected in series and a resistor R3 is connected to them. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler infrared emitting diode U2A, respectively. The third and fourth pins of the microcontroller U3 are connected in parallel with the input and output terminals of the optocoupler infrared receiver U2B, respectively. A capacitor C5 is connected in parallel to the input terminal of the optocoupler U2B, and a capacitor C4 is connected in parallel to the output terminal of the optocoupler U2B. The output terminal of the optocoupler U2B is grounded.

9. The induction control system for floating ground power supply of the lamp as described in claim 2, characterized in that: The microcontroller U3 is model FT6IEC21B-RB.

10. The induction control system for floating ground power supply of the lamp as described in claim 2, characterized in that: The optocoupler is model PC817.

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