Human body existence detection sensor

Abstract

The utility model discloses a human body existence detection sensor which comprises a Bluetooth chip, an antenna circuit, a battery power supply circuit, a 24G radar sensor circuit, a pyroelectric infrared sensor circuit, an ambient light sensor circuit, a key circuit and an LED indicating lamp circuit. According to the utility model, the energy-saving advantage of the pyroelectric infrared sensor and the high sensitivity, strong anti-interference and complex environment and static environment detection supporting capability of the 24G radar sensor are integrated, the dual induction of human body motion and micro motion is realized, the power consumption of the induction device is greatly reduced, the situation that the human body cannot be detected when the human body does not move is avoided, and the safety of the human body is improved. The advantages of the radar sensing module and the infrared sensing module are perfectly combined.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a human presence detection sensor. Background Technology

[0002] With rapid societal progress and development, people's demand for intelligent living is increasing, leading to a surge in electricity consumption and making energy conservation and emission reduction a common challenge. Emerging intelligent technologies are rapidly developing, and various control systems are increasingly demonstrating intelligent features, greatly improving electricity efficiency and bringing convenience to people's lives. However, only by obtaining accurate sensing results can the reliability of intelligent terminal devices in executing commands be guaranteed.

[0003] Currently, there are two types of human presence detection sensors on the market: pyroelectric infrared sensors and 24G radar sensors. The advantages of pyroelectric infrared sensors are their low power consumption and lower cost. Their disadvantages include the inability to detect stationary human bodies; potential false triggering due to high temperatures, strong light, or airflow; and low sensitivity to radially moving objects (directly facing the sensor). While 24G radar sensors are unaffected by environmental factors such as temperature, humidity, dust, and light, and simultaneously support speed, distance, direction, and static target detection, their disadvantages include susceptibility to interference from moving objects such as fans and swaying curtains, and higher power consumption due to continuous radar wave emission even when no one is present. Utility Model Content

[0004] In view of this, the main objective of this utility model is to provide a human presence detection sensor.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] This utility model embodiment provides a human presence detection sensor, including:

[0007] Bluetooth chip, antenna circuit, battery power supply circuit, 24G radar sensor circuit, pyroelectric infrared sensor circuit, ambient light sensor circuit, button circuit, LED indicator circuit.

[0008] The battery power supply circuit is connected to the power input terminal of the Bluetooth chip and is used to power the Bluetooth chip.

[0009] The Bluetooth chip is configured to control the battery power supply circuit to selectively supply power to the 24G radar sensor circuit, the pyroelectric infrared sensor circuit, and the ambient light sensor circuit.

[0010] The signal output terminal of the ambient light sensor circuit is connected to the first signal input terminal of the Bluetooth chip, and is used to transmit ambient light intensity data to the Bluetooth chip.

[0011] The signal terminals of the 24G radar sensor circuit and the pyroelectric infrared sensor circuit are respectively connected to the first and second signal terminals of the Bluetooth chip for transmitting human motion signals and infrared sensing signals to the Bluetooth chip.

[0012] The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the Bluetooth chip, and is used to display status information according to the control instructions of the Bluetooth chip.

[0013] The signal output terminal of the button circuit is connected to the fourth signal input terminal of the Bluetooth chip to receive user input commands.

[0014] The antenna circuit is communicatively connected to the third signal terminal of the Bluetooth chip to enable remote data interaction.

[0015] In the above scheme, the antenna circuit includes a second inductor, a third inductor, a fourth inductor, a fifth inductor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, and an antenna. The first end of the second inductor is connected to the ANT terminal of the Bluetooth chip. The second end of the second inductor is connected to the first end of the fifteenth capacitor and the first end of the third inductor. The second end of the third inductor is connected to the first end of the fourth inductor and the first end of the sixteenth capacitor. The second end of the fourth inductor is connected to the first end of the fifth inductor, the first end of the seventeenth capacitor, and the first end of the eighteenth capacitor. The second end of the fifth inductor is connected to the first end of the nineteenth capacitor and the antenna. The second ends of the fifteenth capacitor, the sixteenth capacitor, the seventeenth capacitor, the eighteenth capacitor, and the nineteenth capacitor are all grounded.

[0016] In the above scheme, the battery power supply circuit includes a battery, a 29th capacitor, a 30th capacitor, a 10th resistor, and a 3.3V power output terminal. The power output terminal of the battery is connected to the 3.3V power output terminal, the first terminal of the 29th capacitor, the first terminal of the 30th capacitor, and the first terminal of the 10th resistor. The second terminal of the 10th resistor is connected to the VDD terminal of the Bluetooth chip. The second terminals of the 29th capacitor and the second terminals of the 30th capacitor are both grounded.

[0017] In the above scheme, the 24G radar sensor circuit includes a 22nd capacitor, a 23rd capacitor, a 24th capacitor, a 25th capacitor, a 26th capacitor, a 24G radar sensor, a fourth load switch, a second ferrite bead, a seventh resistor, and an eighth resistor. The first terminal of the 22nd capacitor is connected to the VIN terminal and the 3.3V power output terminal of the fourth load switch, respectively. The ON terminal of the fourth load switch is connected to the first terminals of the seventh and eighth resistors, respectively. The second terminal of the seventh resistor is connected to the P1.02 terminal of the Bluetooth chip. The Vout terminal of the fourth load switch is connected to the first terminal of the 23rd capacitor and the first terminal of the second ferrite bead, respectively. The second end of the second magnetic bead is connected to the first end of the twenty-fourth capacitor, the first end of the twenty-fifth capacitor, the first end of the twenty-sixth capacitor, and the VIN terminal of the 24G radar sensor, respectively. The second ends of the twenty-second capacitor, the eighth resistor, the twenty-third capacitor, the twenty-fourth capacitor, the twenty-fifth capacitor, and the twenty-sixth capacitor are all grounded. The SCL / TX terminal of the 24G radar sensor is connected to the P2.00 terminal of the Bluetooth chip, the SDA / RX terminal of the 24G radar sensor is connected to the P2.02 terminal of the Bluetooth chip, and the OUT terminal of the 24G radar sensor is connected to the P2.01 terminal of the Bluetooth chip.

[0018] In the above scheme, the pyroelectric infrared sensor circuit includes a seventh capacitor, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a second load switch, and a pyroelectric infrared sensor. The first terminal of the seventh capacitor is connected to the 3.3V power output terminal and the VIN terminal of the second load switch. The ON terminal of the second load switch is connected to the first terminals of the fourth and fifth resistors. The second terminal of the fourth resistor is connected to the P1.03 terminal of the Bluetooth chip. The Vout terminal of the second load switch is connected to the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminals of the eighth and ninth capacitors and the VDD terminal of the pyroelectric infrared sensor. The DOC terminal of the pyroelectric infrared sensor... The I / INT terminal is connected in series with the first resistor and then connected to the P1.05 terminal of the Bluetooth chip. The SERIN terminal of the pyroelectric infrared sensor is connected in series with the third resistor and then connected to the P1.04 terminal of the Bluetooth chip. The second terminals of the seventh capacitor, the eighth capacitor, the ninth capacitor, the fifth resistor, and the VSS terminal of the pyroelectric infrared sensor are all grounded.

[0019] In the above scheme, the ambient light sensor circuit includes a thirty-first capacitor, a fourteenth resistor, and an ambient light sensor. The collector of the ambient light sensor is connected to the second end of the fourteenth resistor. The emitter of the ambient light sensor is connected to the P1.06 terminal of the Bluetooth chip, the first end of the fourteenth resistor, and the first end of the thirty-first capacitor, respectively. The second end of the fourteenth resistor and the second end of the thirty-first capacitor are both grounded.

[0020] In the above scheme, the button circuit includes a switch, an eleventh resistor, and a thirty-second capacitor. The first end of the eleventh resistor is connected to the second end of the tenth resistor. The second end of the eleventh resistor is connected to the first end of the switch, the P0.01 terminal of the Bluetooth chip, and the first end of the thirty-second capacitor. The second end of the switch and the second end of the thirty-second capacitor are both grounded.

[0021] In the above scheme, the LED indicator circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a twelfth resistor, a thirteenth resistor, and a fifteenth resistor. The positive terminal of the first light-emitting diode is connected to the second terminal of the tenth resistor, the positive terminal of the second light-emitting diode, and the positive terminal of the third light-emitting diode, respectively. The negative terminal of the first light-emitting diode is connected in series with the twelfth resistor and then connected to the P2.03 terminal of the Bluetooth chip. The negative terminal of the second light-emitting diode is connected in series with the thirteenth resistor and then connected to the P2.05 terminal of the Bluetooth chip. The negative terminal of the third light-emitting diode is connected in series with the fifteenth resistor and then connected to the P2.04 terminal of the Bluetooth chip.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This invention integrates the energy-saving advantages of pyroelectric infrared sensors with the high sensitivity, strong anti-interference capabilities, and ability to detect complex and static environments of 24G radar sensors. It achieves dual sensing of human movement and micro-motion, greatly reducing the power consumption of the sensing device and avoiding the situation where the human body cannot be detected when it is not moving. It perfectly combines the advantages of radar sensing modules and infrared sensing modules. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this invention, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a human presence detection sensor according to an embodiment of the present invention;

[0026] Figure 2This is a schematic diagram of the structure of the Bluetooth chip in a human presence detection sensor according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the antenna circuit in a human presence detection sensor according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the battery power supply circuit in a human presence detection sensor according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the 24G radar sensor circuit in a human presence detection sensor according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the pyroelectric infrared sensor circuit in a human presence detection sensor according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the ambient light sensor circuit in a human presence detection sensor according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the button circuit in a human presence detection sensor according to an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the LED indicator circuit in a human presence detection sensor according to an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0037] This utility model embodiment provides a human presence detection sensor, such as... Figure 1-9 As shown, it includes:

[0038] Bluetooth chip, antenna circuit, battery power supply circuit, 24G radar sensor circuit, pyroelectric infrared sensor circuit, ambient light sensor circuit, button circuit, LED indicator circuit.

[0039] The battery power supply circuit is connected to the power input terminal of the Bluetooth chip and is used to power the Bluetooth chip.

[0040] The Bluetooth chip is configured to control the battery power supply circuit to selectively supply power to the 24G radar sensor circuit, the pyroelectric infrared sensor circuit, and the ambient light sensor circuit.

[0041] The signal output terminal of the ambient light sensor circuit is connected to the first signal input terminal of the Bluetooth chip, and is used to transmit ambient light intensity data to the Bluetooth chip.

[0042] The signal terminals of the 24G radar sensor circuit and the pyroelectric infrared sensor circuit are respectively connected to the first and second signal terminals of the Bluetooth chip for transmitting human motion signals and infrared sensing signals to the Bluetooth chip.

[0043] The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the Bluetooth chip, and is used to display status information according to the control instructions of the Bluetooth chip.

[0044] The signal output terminal of the button circuit is connected to the fourth signal input terminal of the Bluetooth chip to receive user input commands.

[0045] The antenna circuit is communicatively connected to the third signal terminal of the Bluetooth chip to enable remote data interaction.

[0046] like Figure 1-3As shown, the antenna circuit includes a second inductor L2, a third inductor L3, a fourth inductor L4, a fifth inductor L5, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, and an antenna ANT1. The first terminal of the second inductor L2 is connected to the ANT terminal of the Bluetooth chip MU1. The second terminal of the second inductor L2 is connected to the first terminal of the fifteenth capacitor C15 and the first terminal of the third inductor L3, respectively. The second terminal of the third inductor L3 is connected to the first terminal of the fourth inductor L4. The first terminal is connected to the first terminal of the sixteenth capacitor C16. The second terminal of the fourth inductor L4 is connected to the first terminal of the fifth inductor L5, the first terminal of the seventeenth capacitor C17, and the first terminal of the eighteenth capacitor C18, respectively. The second terminal of the fifth inductor L5 is connected to the first terminal of the nineteenth capacitor C19 and the antenna ANT1, respectively. The second terminals of the fifteenth capacitor C15, the sixteenth capacitor C16, the seventeenth capacitor C17, the eighteenth capacitor C18, and the nineteenth capacitor C19 are all grounded.

[0047] like Figure 1 , Figure 2 ,and Figure 4 As shown, the battery power supply circuit includes a battery BT, a 29th capacitor C29, a 30th capacitor C30, a 10th resistor R10, and a 3.3V power output terminal VCC_3.3V. The power output terminal of the battery BT is connected to the 3.3V power output terminal VCC_3.3V, the first terminal of the 29th capacitor C29, the first terminal of the 30th capacitor C30, and the first terminal of the 10th resistor R10. The second terminal of the 10th resistor R10 is connected to the VDD terminal of the Bluetooth chip MU1. The second terminals of the 29th capacitor C29 and the 30th capacitor C30 are both grounded.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the 24G radar sensor circuit includes a 22nd capacitor C22, a 23rd capacitor C23, a 24th capacitor C24, a 25th capacitor C25, a 26th capacitor C26, a 24G radar sensor U3, a fourth load switch U4, a second ferrite bead FB2, a seventh resistor R7, and an eighth resistor R8. The first terminal of the 22nd capacitor C22 is connected to the VIN terminal and the 3.3V power output terminal VCC_3.3V of the fourth load switch U4. The ON terminal of the fourth load switch U4 is connected to the first terminal of the seventh resistor R7 and the first terminal of the eighth resistor R8. The second terminal of the seventh resistor R7 is connected to the P1.02 terminal of the Bluetooth chip MU1. The Vout terminal of the fourth load switch U4 is connected to the first terminal of the 23rd capacitor C23 and the second ferrite bead FB2. One end is connected, and the second end of the second magnetic bead FB2 is connected to the first end of the twenty-fourth capacitor C24, the first end of the twenty-fifth capacitor C25, the first end of the twenty-sixth capacitor C26, and the VIN end of the 24G radar sensor U3, respectively. The second ends of the twenty-second capacitor C22, the eighth resistor R8, the twenty-third capacitor C23, the twenty-fourth capacitor C24, the twenty-fifth capacitor C25, and the twenty-sixth capacitor C26 are all grounded. The SCL / TX end of the 24G radar sensor U3 is connected to the P2.00 end of the Bluetooth chip MU1, the SDA / RX end of the 24G radar sensor U3 is connected to the P2.02 end of the Bluetooth chip MU1, and the OUT end of the 24G radar sensor U3 is connected to the P2.01 end of the Bluetooth chip MU1.

[0049] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the pyroelectric infrared sensor circuit includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second load switch U2, and a pyroelectric infrared sensor U1. The first terminal of the seventh capacitor C7 is connected to the 3.3V power output terminal VCC_3.3V and the VIN terminal of the second load switch U2. The ON terminal of the second load switch U2 is connected to the first terminals of the fourth resistor R4 and the fifth resistor R5. The second terminal of the fourth resistor R4 is connected to the P1.03 terminal of the Bluetooth chip MU1. The Vout terminal of the second load switch U2... The first end of the second resistor R2 is connected to the first end of the eighth capacitor C8, the first end of the ninth capacitor C9, and the VDD end of the pyroelectric infrared sensor U1. The DOCI / INT end of the pyroelectric infrared sensor U1 is connected to the P1.05 end of the Bluetooth chip MU1 after being connected in series with the first resistor R1. The SERIN end of the pyroelectric infrared sensor U1 is connected to the P1.04 end of the Bluetooth chip MU1 after being connected in series with the third resistor R3. The second ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, the fifth resistor R5, and the VSS end of the pyroelectric infrared sensor U1 are all grounded.

[0050] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the ambient light sensor circuit includes a 31st capacitor C31, a 14th resistor R4, and an ambient light sensor SQ1. The collector of the ambient light sensor SQ1 is connected to the second terminal of the 14th resistor R4. The emitter of the ambient light sensor SQ1 is connected to the P1.06 terminal of the Bluetooth chip MU1, the first terminal of the 14th resistor R4, and the first terminal of the 31st capacitor C31. The second terminals of the 14th resistor R14 and the 31st capacitor C31 are both grounded.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown, the button circuit includes a switch K1, an eleventh resistor R11, and a thirty-second capacitor C32. The first end of the eleventh resistor R11 is connected to the second end of the tenth resistor R10. The second end of the eleventh resistor R11 is connected to the first end of the switch K1, the P0.01 terminal of the Bluetooth chip MU1, and the first end of the thirty-second capacitor C32. The second ends of the switch K1 and the thirty-second capacitor C32 are both grounded.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, the LED indicator circuit includes a first light-emitting diode LED1, a second light-emitting diode LED2, a third light-emitting diode LED3, a twelfth resistor R12, a thirteenth resistor R13, and a fifteenth resistor R15. The positive terminal of the first light-emitting diode LED1 is connected to the second terminal of the tenth resistor R10, the positive terminal of the second light-emitting diode LED2, and the positive terminal of the third light-emitting diode LED3, respectively. The negative terminal of the first light-emitting diode LED1 is connected to the P2.03 terminal of the Bluetooth chip MU1 after being connected in series with the twelfth resistor R12. The negative terminal of the second light-emitting diode LED2 is connected to the P2.05 terminal of the Bluetooth chip MU1 after being connected in series with the thirteenth resistor R13. The negative terminal of the third light-emitting diode LED3 is connected to the P2.04 terminal of the Bluetooth chip MU1 after being connected in series with the fifteenth resistor R15.

[0053] The working principle of this utility model is as follows:

[0054] like Figure 1-9 As shown, this utility model uses a 3.3V lithium battery for power supply, and provides a stable voltage to the system through the battery BT power supply circuit (including the 29th filter capacitor C29 and the 30th capacitor C30). The Bluetooth chip MU1 controls the second load switch U2 and the fourth load switch U4 through GPIO pins (such as pins P1.02 and P1.03) to supply power to the 24G radar sensor U3 and the pyroelectric infrared sensor U1 as needed.

[0055] The ambient light sensor SQ1 detects ambient brightness via a phototransistor, and the signal is input to the Bluetooth chip MU1 via pin P1.06. The Bluetooth chip MU1 dynamically adjusts the detection threshold or trigger frequency of the radar / PIR according to the light intensity (e.g., increasing sensitivity in low-light environments and reducing false triggers in strong light).

[0056] The 24G radar sensor U3 uses the Doppler radar principle. It transmits 24GHz microwaves through antenna ANT1 and receives the frequency shift of reflected waves caused by human movement (Doppler effect). It outputs an analog signal (OUT pin) to the P2.01 pin of Bluetooth chip MU1. It can detect stationary or slightly moving human bodies (such as breathing) and is suitable for complex environments (penetrating non-metallic obstructions).

[0057] The pyroelectric infrared sensor U1 is used to detect changes in the infrared radiation emitted by the human body. When the human body moves, the pyroelectric infrared sensor U1 outputs a digital pulse signal (from the DOCI / INT pin through the first resistor R1 to the P1.05 pin of the Bluetooth chip MU1), triggering an interrupt in the Bluetooth chip MU1.

[0058] The Bluetooth chip MU1 performs logical fusion (such as AND or OR judgment) between the analog signal of the radar (ADC sampling) and the digital signal of the pyroelectric infrared sensor U1, and combines the ambient light data to comprehensively determine the presence of the human body, which greatly reduces the false alarm rate of a single sensor (such as radar for pet movement, PIR for heat source interference).

[0059] The antenna circuit employs a π-type matching network (L2-L5, C15-C19) to ensure stable transmission of the 2.4GHz signal under Bluetooth 5.0 / 5.1 protocols. Detection results (human status, sensor data) are sent to the cloud or a mobile app via the ANT pin, supporting remote monitoring and historical data analysis.

[0060] The button circuit achieves local control through switch K1 (connected to pin P0.01), such as reset, mode switching (normally open / energy saving), sensitivity adjustment, and long press / short press combination supports multiple commands.

[0061] Three-color LED indicator: RGB LED (connected to pins P2.03-P2.05) displays system status (green: normal detection, red: alarm, blue: Bluetooth connection status), and brightness is adjusted by current limiting resistors (R12-R14).

[0062] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A human presence detection sensor, characterized in that, include: Bluetooth chip, antenna circuit, battery power supply circuit, 24G radar sensor circuit, pyroelectric infrared sensor circuit, ambient light sensor circuit, button circuit, LED indicator circuit. The battery power supply circuit is connected to the power input terminal of the Bluetooth chip and is used to power the Bluetooth chip. The Bluetooth chip is configured to control the battery power supply circuit to selectively supply power to the 24G radar sensor circuit, the pyroelectric infrared sensor circuit, and the ambient light sensor circuit. The signal output terminal of the ambient light sensor circuit is connected to the first signal input terminal of the Bluetooth chip, and is used to transmit ambient light intensity data to the Bluetooth chip. The signal terminals of the 24G radar sensor circuit and the pyroelectric infrared sensor circuit are respectively connected to the first and second signal terminals of the Bluetooth chip for transmitting human motion signals and infrared sensing signals to the Bluetooth chip. The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the Bluetooth chip, and is used to display status information according to the control instructions of the Bluetooth chip. The signal output terminal of the button circuit is connected to the fourth signal input terminal of the Bluetooth chip to receive user input commands. The antenna circuit is communicatively connected to the third signal terminal of the Bluetooth chip to enable remote data interaction.

2. The human presence detection sensor according to claim 1, characterized in that, The antenna circuit includes a second inductor, a third inductor, a fourth inductor, a fifth inductor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, and an antenna. The first end of the second inductor is connected to the ANT terminal of the Bluetooth chip. The second end of the second inductor is connected to the first end of the fifteenth capacitor and the first end of the third inductor. The second end of the third inductor is connected to the first end of the fourth inductor and the first end of the sixteenth capacitor. The second end of the fourth inductor is connected to the first end of the fifth inductor, the first end of the seventeenth capacitor, and the first end of the eighteenth capacitor. The second end of the fifth inductor is connected to the first end of the nineteenth capacitor and the antenna. The second ends of the fifteenth, sixteenth, seventeenth, eighteenth, and nineteenth capacitors are all grounded.

3. The human presence detection sensor according to claim 2, characterized in that, The battery power supply circuit includes a battery, a 29th capacitor, a 30th capacitor, a 10th resistor, and a 3.3V power output terminal. The power output terminal of the battery is connected to the 3.3V power output terminal, the first terminal of the 29th capacitor, the first terminal of the 30th capacitor, and the first terminal of the 10th resistor. The second terminal of the 10th resistor is connected to the VDD terminal of the Bluetooth chip. The second terminals of the 29th capacitor and the 30th capacitor are both grounded.

4. A human presence detection sensor according to claim 3, characterized in that, The 24G radar sensor circuit includes a 22nd capacitor, a 23rd capacitor, a 24th capacitor, a 25th capacitor, a 26th capacitor, a 24G radar sensor, a fourth load switch, a second ferrite bead, a seventh resistor, and an eighth resistor. The first terminal of the 22nd capacitor is connected to the VIN terminal and the 3.3V power output terminal of the fourth load switch. The ON terminal of the fourth load switch is connected to the first terminals of the seventh and eighth resistors. The second terminal of the seventh resistor is connected to the P1.02 terminal of the Bluetooth chip. The Vout terminal of the fourth load switch is connected to the first terminal of the 23rd capacitor and the first terminal of the second ferrite bead. The second ends of the two magnetic beads are respectively connected to the first ends of the twenty-fourth capacitor, the twenty-fifth capacitor, the twenty-sixth capacitor, and the VIN terminal of the 24G radar sensor. The second ends of the twenty-second capacitor, the eighth resistor, the twenty-third capacitor, the twenty-fourth capacitor, the twenty-fifth capacitor, and the twenty-sixth capacitor are all grounded. The SCL / TX terminal of the 24G radar sensor is connected to the P2.00 terminal of the Bluetooth chip, the SDA / RX terminal of the 24G radar sensor is connected to the P2.02 terminal of the Bluetooth chip, and the OUT terminal of the 24G radar sensor is connected to the P2.01 terminal of the Bluetooth chip.

5. A human presence detection sensor according to claim 4, characterized in that, The pyroelectric infrared sensor circuit includes a seventh capacitor, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a second load switch, and a pyroelectric infrared sensor. The first terminal of the seventh capacitor is connected to the 3.3V power output terminal and the VIN terminal of the second load switch. The ON terminal of the second load switch is connected to the first terminals of the fourth and fifth resistors. The second terminal of the fourth resistor is connected to the P1.03 terminal of the Bluetooth chip. The Vout terminal of the second load switch is connected to the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminals of the eighth and ninth capacitors and the VDD terminal of the pyroelectric infrared sensor. The DOC I / INT terminal of the pyroelectric infrared sensor is connected in series with the first resistor and then to the P1.05 terminal of the Bluetooth chip. The SERIN terminal of the pyroelectric infrared sensor is connected in series with the third resistor and then to the P1.04 terminal of the Bluetooth chip. The second terminals of the seventh, eighth, and ninth capacitors, the second terminal of the fifth resistor, and the VSS terminal of the pyroelectric infrared sensor are all grounded.

6. A human presence detection sensor according to claim 5, characterized in that, The ambient light sensor circuit includes a thirty-first capacitor, a fourteenth resistor, and an ambient light sensor. The collector of the ambient light sensor is connected to the second end of the fourteenth resistor. The emitter of the ambient light sensor is connected to the P1.06 terminal of the Bluetooth chip, the first end of the fourteenth resistor, and the first end of the thirty-first capacitor, respectively. The second ends of the fourteenth resistor and the third-first capacitor are both grounded.

7. A human presence detection sensor according to claim 6, characterized in that, The button circuit includes a switch, an eleventh resistor, and a thirty-second capacitor. The first end of the eleventh resistor is connected to the second end of the tenth resistor. The second end of the eleventh resistor is connected to the first end of the switch, the P0.01 terminal of the Bluetooth chip, and the first end of the thirty-second capacitor. The second end of the switch and the second end of the thirty-second capacitor are both grounded.

8. A human presence detection sensor according to claim 7, characterized in that, The LED indicator circuit includes a first LED, a second LED, a third LED, a twelfth resistor, a thirteenth resistor, and a fifteenth resistor. The positive terminal of the first LED is connected to the second terminal of the tenth resistor, the positive terminal of the second LED, and the positive terminal of the third LED. The negative terminal of the first LED is connected in series with the twelfth resistor and then connected to the P2.03 terminal of the Bluetooth chip. The negative terminal of the second LED is connected in series with the thirteenth resistor and then connected to the P2.05 terminal of the Bluetooth chip. The negative terminal of the third LED is connected in series with the fifteenth resistor and then connected to the P2.04 terminal of the Bluetooth chip.

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