CN217428403U

CN217428403U - Trigger time-delay microwave radar induction power supply

Info

Publication number: CN217428403U
Application number: CN202221056330.9U
Authority: CN
Inventors: 郭志清
Original assignee: Zhongshan Yishi Lighting Technology Co ltd
Current assignee: Zhongshan Yishi Lighting Technology Co ltd
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2022-09-13
Anticipated expiration: 2032-04-30

Abstract

The utility model discloses a trigger time-delay microwave radar induction power supply, which is used for an LED lamp with a light source module and comprises a power supply shell; the input voltage rectifying and filtering unit is used for accessing input voltage and rectifying and filtering the input voltage; the power supply input end of the LED driving unit is connected with the output end of the input voltage rectifying and filtering unit, and the power supply output end of the LED driving unit is used for being connected with the light source module; the microwave radar induction unit comprises a power supply unit, an MCU, an intermediate frequency amplifying circuit and a radio frequency circuit, wherein the input end of the power supply unit is connected with an input voltage rectifying and filtering unit to obtain working voltage. This technical scheme directly sets up microwave radar induction element in the power casing, and intermediate frequency amplifier circuit generates 24GHz millimeter wave sensing signal according to the intermediate frequency signal drive radio frequency circuit of MCU output, can sense human small action, and MCU receives the millimeter wave signal of human reflection after control LED drive unit time delay outage, really accomplishes that the people is bright at the lamp, and the people goes the lamp and goes out.

Description

Trigger time-delay microwave radar induction power supply

Technical Field

The utility model relates to a LED lamps and lanterns drive power supply field, in particular to trigger time delay microwave radar response power.

Background

The existing microwave radar induction lamp basically has an induction delay function, but the condition for triggering the delay function is not intelligent and humanized. The concrete points are as follows: when the time delay function needs to be triggered, the movement of an object needs to be sensed, and the movement needs a certain amplitude, which is very inconvenient for some people who do not want to move or have difficulty in moving.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a trigger time delay microwave radar response power, the human removal of accurate response of aim at is in order to trigger LED lamps and lanterns drive power supply's time delay function.

A trigger time-delay microwave radar induction power supply is used for an LED lamp with a light source module and comprises a power supply shell; and disposed within the power supply housing: the input voltage rectifying and filtering unit is used for accessing input voltage and rectifying and filtering the input voltage; the power supply input end of the LED driving unit is connected with the output end of the input voltage rectifying and filtering unit, and the power supply output end of the LED driving unit is used for being connected with the light source module; the microwave radar sensing unit comprises a power supply unit, an MCU (microprogrammed control unit), a medium-frequency amplification circuit and a radio frequency circuit, wherein the input end of the power supply unit is connected with an input voltage rectifying and filtering unit to obtain working voltage, the output end of the power supply unit is respectively connected with the MCU, the medium-frequency amplification circuit and the radio frequency circuit to provide working voltage, the medium-frequency amplification circuit is connected between the MCU and the radio frequency circuit to drive the radio frequency circuit to generate millimeter wave sensing signals according to medium-frequency signals output by the MCU, and the control end of the MCU is connected with an LED driving unit to control the LED driving unit to supply power and cut off power for the light source module.

Further, the radio frequency circuit comprises a mixer, an oscillator and a millimeter wave antenna which are connected with each other, the mixer is also connected with the intermediate frequency amplifying circuit, and the oscillator is connected with the power supply unit to obtain the working voltage.

Further, the LED driving unit adopts a constant current driving control chip U1, a diode D1, a resistor R1 and a capacitor C2 are connected in parallel between the power output terminal of the constant current driving control chip U1 and the output terminal of the input voltage rectifying and filtering unit, and an inductor L1 is connected between the diode D1 and the resistor R1.

Further, a CS end of the constant current driving control chip U1 is connected to a resistor RS1 and a resistor RS2 that are connected in parallel.

Further, the power supply unit comprises a three-terminal regulator U2, a capacitor C4, an inductor L2, a resistor R2, a diode D2 and a diode D3, wherein the CS end of the three-terminal regulator U2 is sequentially connected with the resistor R2 and the diode D2, and the anode of the diode D2 is grounded; the capacitor C4 and the inductor L2 are respectively connected in parallel between the CS end and the VDD end of the three-terminal regulator U2, and the diode D3 is connected between the capacitor C4 and the inductor L2.

Further, the input voltage rectifying and filtering unit comprises a fuse tube F1, a rectifier bridge stack DB1 and a filter capacitor C1 which are connected in sequence.

According to the above technical scheme of the utility model, following beneficial effect has at least: this technical scheme directly sets up microwave radar induction element in the power casing, and microwave radar induction element's intermediate frequency amplifier circuit generates 24GHz millimeter wave sensing signal according to the intermediate frequency signal drive radio frequency circuit of MCU output, and 24GHz millimeter wave sensing signal can sense human small action, and MCU receives the millimeter wave signal of human reflection back control LED drive unit time delay outage, really accomplishes that the people is bright at the lamp, and the people goes the lamp and goes out.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic block diagram of a triggering delay microwave radar induction power supply according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of a microwave radar sensing unit;

fig. 3 is a circuit diagram of the induction power supply of the delayed microwave radar according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1, a triggered delayed microwave radar induction power supply according to an embodiment of the present invention is used for an LED lamp having a light source module, and includes a power supply housing (not shown), and disposed in the power supply housing: the system comprises an input voltage rectifying and filtering unit 100, an LED driving unit 200 and a microwave radar induction unit 300. The power supply shell is a mounting carrier, and can be a conventional cuboid shell or a special-shaped object similar to a cuboid. It can be understood that, be provided with the PCB board in the power casing, input voltage rectification filter unit 100, LED drive unit 200, circuit units such as microwave radar response unit 300 set up on the PCB board, input voltage rectification filter unit 100 provides direct current voltage, LED drive unit 200 converts direct current voltage into the voltage that is fit for load (light source module) work, and microwave radar response unit 300 plays an inductive switch's effect, mainly can not be applicable to the problem of the small action of human body in the current scheme.

Referring to fig. 3, the input voltage rectifying and filtering unit 100 of the present embodiment is used for receiving an input voltage, rectifying and filtering the input voltage, and providing voltage input for the LED driving unit 200 and the microwave radar sensing unit 300, respectively.

The power input end of the LED driving unit 200 is connected to the output end of the input voltage rectifying and filtering unit 100, and the power output end of the LED driving unit 200 is used for connecting the light source module;

the microwave radar sensing unit 300 comprises a power supply unit 310, an MCU320, an intermediate frequency amplifying circuit 330 and a radio frequency circuit 340, wherein the input end of the power supply unit 310 is connected with the input voltage rectifying and filtering unit 100 to obtain a working voltage of 5V, the output end of the power supply unit 310 is respectively connected with the MCU320, the intermediate frequency amplifying circuit 330 and the radio frequency circuit 340 to provide the working voltage, the intermediate frequency amplifying circuit 330 is connected between the MCU320 and the radio frequency circuit 340 to drive the radio frequency circuit 340 to generate millimeter wave sensing signals according to intermediate frequency signals output by the MCU320, and the control end of the MCU320 is connected with the LED driving unit 200 to control the LED driving unit to supply power and cut off power to the light source module.

It can be seen that, the microwave radar sensing unit 300 is directly arranged in the power supply shell in the technical scheme, compared with the prior art which is integrated in the lamp body, the microwave radar sensing unit has stronger adaptability, the whole lamp can be replaced without replacing the lamp, only the driving power supply of the existing lamp is replaced, the replacement cost is lower, and the microwave radar sensing unit has higher market value; the intermediate frequency amplifying circuit 330 of the microwave radar sensing unit 300 drives the radio frequency circuit 340 to generate 24GHz millimeter wave sensing signals according to the intermediate frequency signals output by the MCU320, the 24GHz millimeter wave sensing signals can sense the micro motion of a human body, and the MCU320 controls the LED driving unit 200 to be powered off in a delayed mode after receiving the millimeter wave signals reflected by the human body, so that the situation that the lamp is on when a person is really achieved, and the lamp is off when the person walks is really achieved.

Specifically, after the microwave radar sensing unit 300 is powered on, the power supply unit 310 respectively supplies power to the MCU320, the intermediate frequency amplification circuit 330, and the radio frequency circuit 340, when the MCU320 is powered on, the internal program starts to operate, and outputs an intermediate frequency signal to the intermediate frequency amplification circuit 330, the intermediate frequency amplification circuit 330 amplifies the signal, the intermediate frequency amplification circuit 330 employs a dual operational amplifier structure, and a 50HZ/60HZ trap is added, which can reduce interference introduced by the power frequency of the power grid. The amplified signal is input into the radio frequency circuit 340, the radio frequency circuit 340 generates a high frequency signal, the high frequency signal is emitted, the high frequency signal is reflected after contacting an object, and the MCU320 controls the LED driving unit 200 to delay power off after receiving the millimeter wave signal reflected by the human body.

As shown in fig. 2, the rf circuit 340 includes a mixer 341, an oscillator 342, and a millimeter wave antenna 343, which are connected to each other, the mixer 341 is further connected to the if amplifier circuit 330, and the oscillator 342 is connected to the power supply unit 310 to obtain an operating voltage. The intermediate frequency signal amplified by the intermediate frequency amplifying circuit 330 enters the oscillator 342 through the mixer 341, a 24GHz millimeter wave transmitting signal is formed through high-frequency oscillation of the oscillator 342 and is transmitted out through the millimeter wave antenna 343, after the millimeter wave signal reflected by the human body is received by the millimeter wave antenna 343, the transmitted 24GHz millimeter wave transmitting signal and the reflected and received 24GHz millimeter wave transmitting signal are fused through the mixer 341 and enter the MCU320 through the intermediate frequency amplifying circuit 330 for identification, and the action signal of the human body is analyzed.

As shown in fig. 3, the LED driving unit 200 employs a constant current driving control chip U1, a diode D1, a resistor R1 and a capacitor C2 are connected in parallel between the power output terminal of the constant current driving control chip U1 and the output terminal of the input voltage rectifying and filtering unit 100, and an inductor L1 is connected between the diode D1 and the resistor R1. The constant current drive control chip U1 detects a trigger signal of the microwave radar sensing unit 300 on one hand, and outputs a switching signal on the other hand to control the light source module to be turned on and off on the other hand, during operation, the MCU320 detects an action signal of a human body and outputs a high level to the constant current drive control chip U1, the constant current drive control chip U1 outputs a turn-on signal to the inductor L1, the inductor L1 outputs stored power energy to drive the LED to emit light, the diode D1 can prevent the positive electrode and the negative electrode from being connected in reverse, the resistor R1 is used for stabilizing output voltage during no-load, and the output filter capacitor C2 is used for eliminating harmonic interference.

Furthermore, the CS end of the constant current driving control chip U1 is connected with a resistor RS1 and a resistor RS2 which are connected in parallel, so that the influence of dc power supply fluctuation can be reduced.

Further, the power supply unit comprises a three-terminal regulator U2, a capacitor C4, an inductor L2, a resistor R2, a diode D2 and a diode D3, wherein a CS end of the three-terminal regulator U2 is sequentially connected with the resistor R2 and the diode D2, and the anode of the diode D2 is grounded; the capacitor C4 and the inductor L2 are respectively connected in parallel between the CS end and the VDD end of the three-terminal regulator U2, and the diode D3 is connected between the capacitor C4 and the inductor L2. And the three-terminal voltage regulator U2 realizes voltage reduction and voltage stabilization and provides the voltage reduction and voltage stabilization for the microwave radar sensing unit.

Further, the input voltage rectifying and filtering unit comprises a fuse tube F1, a rectifier bridge stack DB1 and a filter capacitor C1 which are connected in sequence. The fuse tube F1 can be fused to protect the power supply when short circuit occurs, the rectifier bridge DB1 is used for converting alternating current into direct current, and the filter capacitor C1 can filter alternating current components in pulsating direct current voltage.

In order to further improve the accuracy of detecting human body activities, the constant current driving control chip U1 is further connected with a pyroelectric sensor, which can sense infrared signals radiated by a human body and can accurately identify the human body without any sound.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a trigger time delay microwave radar response power for LED lamps and lanterns with light source module, its characterized in that: comprises that

A power supply housing; and arranged in the power supply casing

The input voltage rectifying and filtering unit is used for accessing input voltage and rectifying and filtering the input voltage;

the power supply input end of the LED driving unit is connected with the output end of the input voltage rectifying and filtering unit, and the power supply output end of the LED driving unit is used for being connected with the light source module;

the microwave radar sensing unit comprises a power supply unit, an MCU (microprogrammed control unit), a medium-frequency amplification circuit and a radio frequency circuit, wherein the input end of the power supply unit is connected with an input voltage rectifying and filtering unit to obtain working voltage, the output end of the power supply unit is respectively connected with the MCU, the medium-frequency amplification circuit and the radio frequency circuit to provide working voltage, the medium-frequency amplification circuit is connected between the MCU and the radio frequency circuit to drive the radio frequency circuit to generate millimeter wave sensing signals according to medium-frequency signals output by the MCU, and the control end of the MCU is connected with an LED driving unit to control the LED driving unit to supply power and cut off power for the light source module.

2. A triggered time delayed microwave radar induction power supply according to claim 1, characterised in that: the radio frequency circuit comprises a mixer, an oscillator and a millimeter wave antenna which are connected with each other, the mixer is further connected with the intermediate frequency amplification circuit, and the oscillator is connected with the power supply unit to obtain working voltage.

3. A triggered time delayed microwave radar induction power supply according to claim 1, characterised in that: the LED driving unit adopts a constant current driving control chip U1, a diode D1, a resistor R1 and a capacitor C2 are connected in parallel between the power output end of the constant current driving control chip U1 and the output end of the input voltage rectifying and filtering unit, and an inductor L1 is connected between the diode D1 and the resistor R1.

4. A triggered time delayed microwave radar induction power supply according to claim 3, characterised in that: the CS end of the constant current drive control chip U1 is connected with a resistor RS1 and a resistor RS2 which are connected in parallel.

5. A triggered time delayed microwave radar induction power supply according to claim 1, characterised in that: the power supply unit comprises a three-terminal regulator U2, a capacitor C4, an inductor L2, a resistor R2, a diode D2 and a diode D3, wherein the CS end of the three-terminal regulator U2 is sequentially connected with the resistor R2 and the diode D2, and the anode of the diode D2 is grounded; the capacitor C4 and the inductor L2 are respectively connected in parallel between the CS end and the VDD end of the three-terminal regulator U2, and the diode D3 is connected between the capacitor C4 and the inductor L2.

6. A triggered time delayed microwave radar induction power supply according to claim 1, characterised in that: the input voltage rectifying and filtering unit comprises a fuse F1, a rectifier bridge stack DB1 and a filter capacitor C1 which are connected in sequence.