Novel microwave radar induction power supply capable of gradually changing on and off

Abstract

The utility model discloses a novel microwave radar induction power supply capable of gradually changing on and off. The novel microwave radar induction power supply comprises an input voltage rectification circuit, a microwave radar induction circuit connected with the input voltage rectification circuit, and an LED linear constant current drive circuit connected with the microwave radar induction circuit. The output end of the LED linear constant-current driving circuit is connected with the LED lamp and enables the LED lamp to be turned on or turned off gradually. The LED lamp is reasonable in structural arrangement, is provided with the LED linear constant-current driving circuit and is matched with the microwave radar induction circuit, so that after the microwave radar induction circuit induces an external signal, the LED lamp can be gradually turned on or turned off through the LED linear constant-current driving circuit, the gradual turning on and turning off of the lamp can be realized, the comfort of eyes can be improved, and the LED lamp is convenient to use. And the applicability and the practicability are high.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supplies, and particularly relates to a new microwave radar induction power supply capable of gradually brightening and dimming. Background Art

[0002] In LED lighting products, in order to improve the convenience of control, a corresponding microwave radar structure is generally provided. The LED lighting products are sensed by the microwave radar. When an object approaches and moves, the lamp is triggered to light up instantly. When the sensed object moves away, the lamp goes out. Although the lamp can be sensed and controlled, the brightening and dimming of the lamp are completed instantly, so the eyes will be stimulated at the moment of brightening and dimming, giving people a sudden discomfort, so the applicability and practicability are limited. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a new microwave radar induction power supply with reasonable structure and beneficial to realizing the gradual brightening and dimming of lamps.

[0004] The technical solution for realizing the purpose of the utility model is a new microwave radar induction power supply capable of gradually brightening and dimming, including an input voltage rectification circuit, a microwave radar induction circuit connected to the input voltage rectification circuit, and an LED linear constant current drive circuit connected to the microwave radar induction circuit;

[0005] The output end of the LED linear constant current drive circuit is connected to an LED lamp and makes the LED lamp gradually brighten or dim.

[0006] Further preferably: the main chip model of the LED linear constant current drive circuit is SM2189EM.

[0007] Further preferably: the microwave radar induction circuit includes a radar module and a radar power supply circuit connected to the radar module;

[0008] The output end of the input voltage rectification circuit is connected to the radar power supply circuit, and the radar module is connected to the LED linear constant current drive circuit.

[0009] Further preferably: the radar power supply circuit includes a power supply voltage stabilizing chip, a second voltage stabilizing diode, a fourth freewheeling diode, a second filter capacitor, an energy storage inductor, a first capacitor, a sixth resistor, and a third one-way diode;

[0010] The positive electrode of the second voltage stabilizing diode is connected to the input voltage rectification circuit;

[0011] The negative electrode of the second voltage stabilizing diode is connected to the power supply terminal of the power supply voltage stabilizing chip. The positive electrode of the fourth freewheeling diode is connected to the negative electrode of the second voltage stabilizing diode through a second filter capacitor, and the second filter capacitor and the positive electrode of the fourth freewheeling diode are grounded;

[0012] The negative electrode of the fourth freewheeling diode is connected to the power supply voltage stabilizing chip through a sixth resistor. One ends of the first capacitor and the energy storage inductor are connected to the negative electrode of the fourth freewheeling diode, and the other end of the first capacitor is connected to the power supply voltage stabilizing chip. The other end of the energy storage inductor is connected to the end of the first capacitor through a third one-way diode, and the negative electrode of the third one-way diode is connected to the end of the first capacitor;

[0013] The other end of the energy storage inductor is connected to the radar module.

[0014] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with an LED linear constant current drive circuit and cooperates with a microwave radar induction circuit. Therefore, after the microwave radar induction circuit senses an external signal, the LED linear constant current drive circuit can make the LED lamp gradually light up or go out, which is beneficial to realizing the gradual brightening and dimming of the lamp and is beneficial to improving the comfort of the eyes. It has strong applicability and good practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments in conjunction with the drawings, wherein:

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is a specific circuit schematic diagram of the utility model.

[0018] Reference numerals: input voltage rectification circuit 1, microwave radar induction circuit 2, LED linear constant current drive circuit 3. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the utility model.

[0020] Embodiment

[0021] See Figure 1 and Figure 2As shown in the figure, a new type of microwave radar induction power supply with variable brightness on and off includes an input voltage rectification circuit 1, a microwave radar induction circuit 2 connected to the input voltage rectification circuit, and an LED linear constant current drive circuit 3 connected to the microwave radar induction circuit. The input voltage rectification circuit includes terminals and a rectification circuit, which is mainly used to convert alternating current into direct current and supply the direct current to the LED linear constant current drive circuit and the microwave radar induction circuit. After the microwave radar induction circuit is powered on, when an external signal is detected, the output terminal of the LED linear constant current drive circuit is connected to the LED lamp and the LED lamp gradually brightens or dims.

[0022] In the actual application process, the main chip model of the LED linear constant current drive circuit is SM2189EM.

[0023] Moreover, the microwave radar induction circuit includes a radar module and a radar power supply circuit connected to the radar module. The output terminal of the input voltage rectification circuit is connected to the radar power supply circuit, and the radar module is connected to the LED linear constant current drive circuit. In this embodiment, the radar module is a conventional structure of the prior art, so it is not described in detail. The power supply of the microwave radar induction circuit is low-voltage 5V direct current.

[0024] The radar power supply circuit includes a power supply voltage regulator chip U1, a second voltage regulator diode D2, a fourth freewheeling diode D4, a second filter capacitor EC2, a storage inductor L1, a first capacitor C1, a sixth resistor R6, and a third one-way diode D3.

[0025] The positive electrode of the second voltage regulator diode is connected to the input voltage rectification circuit.

[0026] The negative electrode of the second voltage regulator diode is connected to the power supply terminal of the power supply voltage regulator chip. The positive electrode of the fourth freewheeling diode is connected to the negative electrode of the second voltage regulator diode through the second filter capacitor, and the second filter capacitor and the positive electrode of the fourth freewheeling diode are grounded.

[0027] The negative electrode of the fourth freewheeling diode is connected to the power supply voltage regulator chip through the sixth resistor. One end of the first capacitor and the storage inductor is connected to the negative electrode of the fourth freewheeling diode, and the other end of the first capacitor is connected to the power supply voltage regulator chip. The other end of the storage inductor is connected to the radar module through the third one-way diode, and the negative electrode of the third one-way diode is connected to the end of the first capacitor.

[0028] The other end of the storage inductor is connected to the radar module.

[0029] The input voltage rectification part includes fuse F1, rectifier bridge DB1, and filter capacitor EC2. The input end of rectifier bridge DB1 is connected to power supply L / N. The radar power supply circuit includes power supply voltage regulator chip U1, energy storage inductor L1, fourth freewheeling diode D4, and fourth filter capacitor EC4. The LED linear constant current drive circuit part includes linear constant current drive chip U2, first filter capacitor EC1, and current sampling resistor R3.

[0030] The input end of rectifier bridge DB1 is connected to input power supply L / N, the output end is connected to second zener diode D2, and the output end of D2 is connected to second filter capacitor EC2. EC2 can provide stable current for the operation of power supply voltage regulator chip U1.

[0031] Pin 5 of linear constant current drive chip U2 is connected to one end of first filter capacitor EC1. After chip U2's pin 8 is connected to first resistor R1, it is then connected to the other end of first filter capacitor EC1. EC1 provides stable current for the operation of U2. Pin 3 of linear constant current drive chip U2 is connected to current sampling resistor R3. The resistance value of current sampling resistor R3 can adjust the output current of the drive power supply.

[0032] Pin 1 of power supply voltage regulator chip U1 is connected to one end of sixth resistor R6. The other end of sixth resistor R6 is then connected to energy storage inductor L1. One end of energy storage inductor L1 is connected to output fourth filter capacitor EC4, and the other end of energy storage inductor L1 is connected to fourth freewheeling diode D4. After voltage regulator chip U1, energy storage inductor L1, fourth freewheeling diode D4, and fourth filter capacitor EC4 work together, a stable 5V DC voltage can be output. After pin 1 of radar module J1 receives the stable 5V voltage, it enters the standby state.

[0033] When radar module J1 senses that an object approaches and moves, pin 2 of radar module J1 immediately outputs a group of PWM signals to pin 1 of linear constant current drive U2. After pin 1 of linear constant current drive U2 receives the PWM signal, it starts to output current to the LED lamp beads, and the LED lamp beads light up slowly.

[0034] After radar module J1 senses that the object has left, pin 2 of radar module J1 stops outputting signals. After pin 1 of linear constant current drive U2 does not receive the PWM signal, it stops outputting current to the LED lamp beads, and the LED lamp beads go out slowly.

[0035] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with an LED linear constant current drive circuit and cooperates with a microwave radar induction circuit. Therefore, after the microwave radar induction circuit senses an external signal, the LED linear constant current drive circuit can make the LED lamp gradually light up or go out, which is beneficial to realizing the gradual lighting and extinguishing of the lamp, and is beneficial to improving the comfort of the eyes. It has strong applicability and good practicability.

[0036] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural components described in the specification can also be directly processed without doubt according to the existing common technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so no specific description will be made here.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A new type of microwave radar induction power supply with gradual on and off, characterized by: It includes an input voltage rectification circuit, a microwave radar sensing circuit connected to the input voltage rectification circuit, and an LED linear constant current driving circuit connected to the microwave radar sensing circuit; The output end of the LED linear constant current driving circuit is connected to the LED lamp and makes the LED lamp gradually brighten or turn off.

2. According to claim 1, a novel microwave radar induction power supply capable of gradually turning on and off is characterized in that: The main chip model of the LED linear constant current drive circuit is SM2189EM.

3. According to claim 1, a novel microwave radar induction power supply capable of gradually turning on and off is characterized in that: The microwave radar sensing circuit includes a radar module and a radar power supply circuit connected to the radar module; The output end of the input voltage rectification circuit is connected to the radar power supply circuit, and the radar module is connected to the LED linear constant current driving circuit.

4. According to claim 3, a novel microwave radar induction power supply capable of gradually turning on and off is characterized in that: The radar power supply circuit includes a power supply voltage stabilizing chip, a second voltage stabilizing diode, a fourth freewheeling diode, a second filter capacitor, an energy storage inductor, a first capacitor, a sixth resistor, and a third unidirectional diode; The anode of the second voltage stabilizing diode is connected to the input voltage rectifying circuit; The cathode of the second voltage stabilizing diode is connected to the power supply terminal of the power supply voltage stabilizing chip, the anode of the fourth freewheeling diode is connected to the cathode of the second voltage stabilizing diode through the second filter capacitor, and the second filter capacitor and the anode of the fourth freewheeling diode are grounded; The cathode of the fourth freewheeling diode is connected to the power supply and voltage stabilizing chip through the sixth resistor, one end of the first capacitor and the energy storage inductor is connected to the cathode of the fourth freewheeling diode, and the other end of the first capacitor is connected to the power supply and voltage stabilizing chip, the other end of the energy storage inductor is connected to the end of the first capacitor through the third unidirectional diode, and the cathode of the third unidirectional diode is connected to the end of the first capacitor; The other end of the energy storage inductor is connected to the radar module.

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