Human body existence detection sensor based on Bluetooth and WIFI transmission

Abstract

The utility model discloses a human body existence detection sensor based on Bluetooth and WIFI transmission. The human body existence detection sensor comprises a WIFI and Bluetooth two-in-one module, an antenna circuit, a Type-C power supply circuit, a pyroelectric infrared sensor circuit, a first power supply control circuit, a 24G radar sensor circuit, a second power supply control circuit, an ambient light acquisition circuit, a key circuit and an LED indicating lamp circuit. According to the utility model, the pyroelectric infrared sensor and the 24GHz radar sensor are integrated, and through a time-sharing power supply strategy of the first power supply control circuit and the second power supply control circuit, the power supply of the sensors is cut off in an unmanned state; when the ambient light acquisition sensor detects the change of the illumination intensity, the double sensors are triggered to be powered on, cooperative detection is started, and a human body existence state is judged by combining a dynamic threshold algorithm, so that the standby power consumption of the system is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a human presence detection sensor based on Bluetooth and WIFI transmission. 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. Integrating both sensors can achieve detection unaffected by environmental factors such as temperature, humidity, dust, and light, and can simultaneously improve the detection of speed, distance, direction, and static targets. However, the disadvantage is that it still needs to continuously emit radar detection waves and infrared rays for detection when no one is present, resulting in higher power consumption. Utility Model Content

[0004] In view of this, the main objective of this utility model is to provide a human presence detection sensor based on Bluetooth and WIFI transmission.

[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 based on Bluetooth and WIFI transmission, including:

[0007] The circuit includes a WIFI / Bluetooth combo module, an antenna circuit, a Type-C power supply circuit, a pyroelectric infrared sensor circuit, a first power control circuit, a 24G radar sensor circuit, a second power control circuit, an ambient light acquisition circuit, a button circuit, and an LED indicator circuit.

[0008] The Type-C power supply circuit is connected to the power input terminal of the WIFI and Bluetooth dual-function module and is used to power the WIFI and Bluetooth dual-function module.

[0009] The WIFI and Bluetooth combo module controls the Type-C power supply circuit to supply power to the ambient light acquisition circuit;

[0010] The WIFI and Bluetooth dual-function module controls the first power control circuit to supply power to the pyroelectric infrared sensor circuit and controls the second power control circuit to supply power to the 24G radar sensor circuit.

[0011] The signal output terminal of the ambient light acquisition circuit is connected to the first signal input terminal of the WIFI and Bluetooth dual-function module, and is used to transmit ambient light intensity data to the WIFI and Bluetooth dual-function module.

[0012] The signal terminals of the pyroelectric infrared sensor circuit and the 24G radar sensor circuit are respectively connected to the first and second signal terminals of the WIFI and Bluetooth dual-function module for transmitting human motion signals and infrared sensing signals to the WIFI and Bluetooth dual-function module.

[0013] The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the WIFI and Bluetooth dual-function module, and is used to display status information according to the control instructions of the WIFI and Bluetooth dual-function module.

[0014] The signal output terminal of the button circuit is connected to the fourth signal input terminal of the WIFI and Bluetooth dual-function module to receive user input commands.

[0015] The antenna circuit is communicatively connected to the third signal terminal of the WIFI and Bluetooth dual-function module to enable remote data interaction.

[0016] In the above scheme, the antenna circuit includes a first inductor, a second inductor, a twenty-fourth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, and an antenna. The first end of the second inductor is connected to the first end of the twenty-eighth capacitor and the LNA_IN terminal of the WIFI-Bluetooth dual-function module. The second end of the second inductor is connected to the first end of the twenty-seventh capacitor, the first end of the first inductor, and the antenna, and then grounded. The second end of the first inductor is connected to the first end of the twenty-fourth capacitor. The second ends of the twenty-fourth capacitor, the twenty-seventh capacitor, and the twenty-eighth capacitor are all grounded.

[0017] In the above scheme, the Type-C power supply circuit includes a Type-C interface, a voltage regulator chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a thirteenth resistor, and a first bidirectional ESD diode. The B9 terminal of the Type-C interface is connected to the A9 terminal of the Type-C interface, the first terminal of the first bidirectional ESD diode, the first terminal of the fourteenth capacitor, the first terminal of the seventeenth capacitor, the VIN terminal of the voltage regulator chip, and the CE terminal of the voltage regulator chip. The VOUT terminal of the voltage regulator chip is connected to the first terminal of the fifteenth capacitor, the first terminal of the sixteenth capacitor, and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the VDDA terminal of the Wi-Fi Bluetooth 2-in-1 module.

[0018] In the above scheme, the ambient light acquisition circuit includes an ambient light acquisition sensor, an eighteenth resistor, and a twenty-first capacitor. The collector of the ambient light acquisition sensor is connected to the second end of the thirteenth resistor. The emitter of the ambient light acquisition sensor is connected to the IO16 terminal of the WIFI Bluetooth dual-mode module, the first end of the eighteenth resistor, and the first end of the twenty-first capacitor, respectively. The second end of the eighteenth resistor and the second end of the twenty-first capacitor are both grounded.

[0019] In the above scheme, the first power control circuit includes a first capacitor, a second capacitor, a first MOSFET, a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, and an eighth resistor. The first terminal of the first capacitor is connected to the VOUT terminal of the voltage regulator chip, the first terminal of the fourth resistor, the first terminal of the second capacitor, and the source of the first MOSFET. The second terminal of the fourth resistor is connected to the first terminal of the fifth resistor and the collector of the second transistor. The second terminal of the fifth resistor is connected to the gate of the first MOSFET and the second terminal of the second capacitor. The base of the second transistor is connected to the first terminal of the sixth resistor and the first terminal of the eighth resistor. The second terminal of the eighth resistor is connected to the emitter of the second transistor and then grounded. The second terminal of the sixth resistor is connected to the IO13 terminal of the WIFI / Bluetooth combo module.

[0020] In the above scheme, the pyroelectric infrared sensor circuit includes a first resistor, a second resistor, a third resistor, a third capacitor, a fourth capacitor, and a pyroelectric infrared sensor. The first end of the second resistor is connected to the drain of the first MOSFET. The second end of the second resistor is connected to the first end of the third capacitor, the first end of the fourth capacitor, and the VDD terminal of the pyroelectric infrared sensor. The second end of the third capacitor is connected to the second end of the fourth capacitor and the VSS terminal of the pyroelectric infrared sensor and then grounded. The DOCI / INT terminal of the pyroelectric infrared sensor is connected in series with the first resistor and then connected to the IO15 terminal of the WIFI / Bluetooth dual-function module. The SERIN terminal of the pyroelectric infrared sensor is connected in series with the third resistor and then connected to the IO14 terminal of the WIFI / Bluetooth dual-function module.

[0021] In the above scheme, the second power control circuit includes an eighth capacitor, a ninth capacitor, a third MOSFET, a fourth transistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The first terminal of the eighth capacitor is connected to the VOUT terminal of the voltage regulator chip, the first terminal of the ninth resistor, the first terminal of the ninth capacitor, and the source of the third MOSFET. The second terminal of the ninth resistor is connected to the first terminal of the tenth resistor and the collector of the fourth transistor. The second terminal of the tenth resistor is connected to the gate of the third MOSFET and the second terminal of the ninth capacitor. The base of the fourth transistor is connected to the first terminal of the eleventh resistor and the first terminal of the twelfth resistor. The second terminal of the twelfth resistor is connected to the emitter of the fourth transistor and then grounded. The second terminal of the eleventh resistor is connected to the IO12 terminal of the WIFI / Bluetooth combo module.

[0022] In the above scheme, the 24G radar sensor circuit includes a first ferrite bead, a second ferrite bead, a 24G radar sensor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, and a thirteenth capacitor. The first terminal of the tenth capacitor is connected to the first terminal of the second ferrite bead and the drain of the third MOSFET. The second terminal of the second ferrite bead is connected to the first terminals of the eleventh, twelfth, and thirteenth capacitors and the VIN terminal of the 24G radar sensor. The GND terminal of the 24G radar sensor is grounded after being connected in series with the first ferrite bead. The second terminals of the tenth, eleventh, twelfth, and thirteenth capacitors are all grounded. The SCL / TX terminal of the 24G radar sensor is connected to the IO17 terminal of the WIFI / Bluetooth dual-module. The SDA / RX terminal of the 24G radar sensor is connected to the IO18 terminal of the WIFI / Bluetooth dual-module. The OUT terminal of the 24G radar sensor is connected to the IO19 terminal of the WIFI / Bluetooth dual-module.

[0023] In the above scheme, the button circuit includes a switch and a twentieth capacitor. The first end of the switch is connected to the IO2 terminal of the WIFI Bluetooth dual-function module and the first end of the twentieth capacitor, respectively. The second end of the switch and the second end of the twentieth capacitor are both grounded.

[0024] 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 sixteenth resistor, a seventeenth resistor, and a nineteenth resistor. The positive terminal of the first light-emitting diode is connected to the second terminal of the thirteenth 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 sixteenth resistor and then connected to the IO8 terminal of the WIFI and Bluetooth dual-function module. The negative terminal of the second light-emitting diode is connected in series with the seventeenth resistor and then connected to the IO7 terminal of the WIFI and Bluetooth dual-function module. The negative terminal of the third light-emitting diode is connected in series with the nineteenth resistor and then connected to the IO6 terminal of the WIFI and Bluetooth dual-function module.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] This invention integrates a pyroelectric infrared sensor and a 24GHz radar sensor. Through a time-sharing power supply strategy of the first power control circuit and the second power control circuit, the power supply to the sensors is cut off when no one is present. When the ambient light sensor detects a change in light intensity, it triggers the dual sensors to be powered on and starts collaborative detection. Combined with a dynamic threshold algorithm, it determines the presence of a human body, thereby significantly reducing the system's standby power consumption. Attached Figure Description

[0027] 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:

[0028] Figure 1 This is a schematic diagram of the structure of a human presence detection sensor based on Bluetooth and WIFI transmission according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a Bluetooth and Wi-Fi dual-mode module in a human presence detection sensor based on Bluetooth and Wi-Fi transmission, as described in an embodiment of this utility model.

[0030] Figure 3 This is a schematic diagram of the Type-C power supply circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0031] Figure 4 This is a schematic diagram of the ambient light acquisition circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0032] Figure 5This is a schematic diagram of the structure of the first power control circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of the pyroelectric infrared sensor circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0034] Figure 7 This is a schematic diagram of the structure of the second power control circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0035] Figure 8 This is a schematic diagram of the 24G radar sensor circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0036] Figure 9 This is a schematic diagram of the button circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model.

[0037] Figure 10 This is a schematic diagram of the LED indicator circuit in a human presence detection sensor based on Bluetooth and WIFI transmission, as described in an embodiment of this utility model. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] This utility model embodiment provides a human presence detection sensor based on Bluetooth and WIFI transmission, such as Figure 1-10 As shown, it includes:

[0042] The system includes a WIFI and Bluetooth 2-in-1 module U2, an antenna circuit, a Type-C power supply circuit, a pyroelectric infrared sensor circuit, a first power control circuit, a 24G radar sensor circuit, a second power control circuit, an ambient light acquisition circuit, a button circuit, and an LED indicator circuit.

[0043] The Type-C power supply circuit is connected to the power input terminal of the WIFI and Bluetooth dual-function module U2 and is used to power the WIFI and Bluetooth dual-function module U2.

[0044] The WIFI and Bluetooth dual-function module U2 controls the Type-C power supply circuit to supply power to the ambient light acquisition circuit;

[0045] The WIFI and Bluetooth dual-function module U2 controls the first power control circuit to supply power to the pyroelectric infrared sensor circuit and controls the second power control circuit to supply power to the 24G radar sensor circuit.

[0046] The signal output terminal of the ambient light acquisition circuit is connected to the first signal input terminal of the WIFI and Bluetooth dual-module U2, and is used to transmit ambient light intensity data to the WIFI and Bluetooth dual-module U2.

[0047] The signal terminals of the pyroelectric infrared sensor circuit and the 24G radar sensor circuit are respectively connected to the first and second signal terminals of the WIFI and Bluetooth dual-module U2 for transmitting human motion signals and infrared sensing signals to the WIFI and Bluetooth dual-module U2.

[0048] The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the WIFI and Bluetooth dual-function module U2, and is used to display status information according to the control instructions of the WIFI and Bluetooth dual-function module U2.

[0049] The signal output terminal of the button circuit is connected to the fourth signal input terminal of the WIFI and Bluetooth dual-module U2 to receive user input commands.

[0050] The antenna circuit is communicatively connected to the third signal terminal of the WIFI and Bluetooth dual-function module U2 to enable remote data interaction.

[0051] like Figure 2 As shown, the antenna circuit includes a first inductor L1, a second inductor L2, a twenty-fourth capacitor C24, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, and an antenna ANT. The first end of the second inductor L2 is connected to the first end of the twenty-eighth capacitor C28 and the LNA_IN terminal of the WIFI-Bluetooth dual-function module U2. The second end of the second inductor L2 is connected to the first end of the twenty-seventh capacitor C27, the first end of the first inductor L1, and the antenna ANT, and then grounded. The second end of the first inductor L1 is connected to the first end of the twenty-fourth capacitor C24. The second ends of the twenty-fourth capacitor C24, the twenty-seventh capacitor C27, and the twenty-eighth capacitor C28 are all grounded.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, the Type-C power supply circuit includes a Type-C interface J1, a voltage regulator chip U4, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, a thirteenth resistor R13, and a first bidirectional ESD diode BD1. The B9 terminal of the Type-C interface J1 is connected to the A9 terminal of the Type-C interface J1, the first terminal of the first bidirectional ESD diode BD1, the first terminal of the fourteenth capacitor C14, the first terminal of the seventeenth capacitor C17, the VIN terminal of the voltage regulator chip U4, and the CE terminal of the voltage regulator chip U4. The VOUT terminal of the voltage regulator chip U4 is connected to the first terminal of the fifteenth capacitor C15, the first terminal of the sixteenth capacitor C16, and the first terminal of the thirteenth resistor R13. The second terminal of the thirteenth resistor R13 is connected to the VDDA terminal of the WIFI / Bluetooth dual-function module U2.

[0053] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the ambient light acquisition circuit includes an ambient light acquisition sensor SQ1, an eighteenth resistor R18, and a twenty-first capacitor C21. The collector of the ambient light acquisition sensor SQ1 is connected to the second end of the thirteenth resistor R13. The emitter of the ambient light acquisition sensor SQ1 is connected to the IO16 terminal of the WIFI Bluetooth dual-module U2, the first end of the eighteenth resistor R18, and the first end of the twenty-first capacitor C21, respectively. The second end of the eighteenth resistor R18 and the second end of the twenty-first capacitor C21 are both grounded.

[0054] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the first power control circuit includes a first capacitor C1, a second capacitor C2, a first MOSFET Q1, a second transistor Q2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and an eighth resistor R8. The first terminal of the first capacitor C1 is connected to the VOUT terminal of the voltage regulator chip U4, the first terminal of the fourth resistor R4, the first terminal of the second capacitor C2, and the source of the first MOSFET Q1. The second terminal of the fourth resistor R4 is connected to the first terminal of the fifth resistor R5 and the collector of the second transistor Q2. The second terminal of the fifth resistor R5 is connected to the gate of the first MOSFET Q1 and the second terminal of the second capacitor C2. The base of the second transistor Q2 is connected to the first terminal of the sixth resistor R6 and the first terminal of the eighth resistor R8. The second terminal of the eighth resistor R8 is connected to the emitter of the second transistor Q2 and then grounded. The second terminal of the sixth resistor R6 is connected to the IO13 terminal of the WIFI / Bluetooth dual-function module U2.

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the pyroelectric infrared sensor circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a third capacitor C3, a fourth capacitor C4, and a pyroelectric infrared sensor U1. The first end of the second resistor R2 is connected to the drain of the first MOSFET Q1. The second end of the second resistor R2 is connected to the first end of the third capacitor C3, the first end of the fourth capacitor C4, and the VDD terminal of the pyroelectric infrared sensor U1. The second end of the third capacitor C3 is connected to the second end of the fourth capacitor C4 and the VSS terminal of the pyroelectric infrared sensor U1 and then grounded. The DOCI / INT terminal of the pyroelectric infrared sensor U1 is connected in series with the first resistor R1 and then connected to the IO15 terminal of the WIFI / Bluetooth dual-module U2. The SERIN terminal of the pyroelectric infrared sensor U1 is connected in series with the third resistor R3 and then connected to the IO14 terminal of the WIFI / Bluetooth dual-module U2.

[0056] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, the second power control circuit includes an eighth capacitor C8, a ninth capacitor C9, a third MOSFET Q3, a fourth transistor Q4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12. The first terminal of the eighth capacitor C8 is connected to the VOUT terminal of the voltage regulator chip U4, the first terminal of the ninth resistor R9, the first terminal of the ninth capacitor C9, and the source of the third MOSFET Q3. The second terminal of the ninth resistor R9 is connected to the first terminal of the tenth resistor R10 and the collector of the fourth transistor Q4. The second terminal of the tenth resistor R10 is connected to the gate of the third MOSFET Q3 and the second terminal of the ninth capacitor C9. The base of the fourth transistor Q4 is connected to the first terminal of the eleventh resistor R11 and the first terminal of the twelfth resistor R12. The second terminal of the twelfth resistor R12 is connected to the emitter of the fourth transistor Q4 and then grounded. The second terminal of the eleventh resistor R11 is connected to the IO12 terminal of the WIFI / Bluetooth dual-function module U2.

[0057] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the 24G radar sensor circuit includes a first magnetic bead FB1, a second magnetic bead FB2, a 24G radar sensor U3, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, and a thirteenth capacitor C13. The first terminal of the tenth capacitor C10 is connected to the first terminal of the second magnetic bead FB2 and the drain of the third MOSFET Q3. The second terminal of the second magnetic bead FB2 is connected to the first terminals of the eleventh capacitor C11, the twelfth capacitor C12, and the thirteenth capacitor C13, and the VIN terminal of the 24G radar sensor U3. The GND terminal of sensor U3 is connected in series with the first ferrite bead FB1 and then grounded. The second terminals of the tenth capacitor C10, the eleventh capacitor C11, the twelfth capacitor C12, and the thirteenth capacitor C13 are all grounded. The SCL / TX terminal of the 24G radar sensor U3 is connected to the IO17 terminal of the WIFI and Bluetooth dual-module U2. The SDA / RX terminal of the 24G radar sensor U3 is connected to the IO18 terminal of the WIFI and Bluetooth dual-module U2. The OUT terminal of the 24G radar sensor U3 is connected to the IO19 terminal of the WIFI and Bluetooth dual-module U2.

[0058] like Figure 1 , Figure 2 , Figure 3 , Figure 9As shown, the button circuit includes a switch K1 and a twentieth capacitor C20. The first end of the switch K1 is connected to the IO2 terminal of the WIFI Bluetooth dual-function module U2 and the first end of the twentieth capacitor C20, respectively. The second end of the switch K1 and the second end of the twentieth capacitor C20 are both grounded.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 10 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 sixteenth resistor R16, a seventeenth resistor R17, and a nineteenth resistor R19. The positive terminal of the first light-emitting diode LED1 is connected to the second terminal of the thirteenth resistor R13, 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 IO8 terminal of the WIFI and Bluetooth dual-module U2 after being connected in series with the sixteenth resistor R16. The negative terminal of the second light-emitting diode LED2 is connected to the IO7 terminal of the WIFI and Bluetooth dual-module U2 after being connected in series with the seventeenth resistor R17. The negative terminal of the third light-emitting diode LED3 is connected to the IO6 terminal of the WIFI and Bluetooth dual-module U2 after being connected in series with the nineteenth resistor R19.

[0060] like Figure 1-10 As shown, this utility model relates to a human presence detection sensor based on Bluetooth and WIFI transmission. Through multi-sensor fusion and a time-sharing power supply strategy, it achieves high-precision, low-power human presence monitoring. Its core working principle is as follows:

[0061] The system employs multimodal data fusion technology using a pyroelectric infrared sensor U1, a 24G radar sensor U3, and an ambient light sensor SQ1 to address the blind zone problem of single-sensor detection.

[0062] The pyroelectric infrared sensor U1 detects human micro-movements (such as breathing and heartbeat) and motion states by emitting high-frequency electromagnetic waves and receiving reflected signals, and can penetrate non-metallic obstacles (such as curtains) to achieve wide-area coverage.

[0063] The 24G radar sensor U3 detects changes in human infrared radiation, quickly responds to large-scale moving targets, and complements radar data to distinguish between the human body and non-living heat sources (such as heating).

[0064] The ambient light sensor SQ1 monitors the ambient light intensity in real time and dynamically adjusts the detection sensitivity thresholds of the pyroelectric infrared sensor U1 and the 24G radar sensor U3 to avoid false triggering in strong light or dark environments.

[0065] The system optimizes energy consumption through a time-sharing power supply control circuit, with the U2 WIFI and Bluetooth combo module controlling power distribution.

[0066] The first power control circuit transmits data to the WIFI and Bluetooth dual-module U2 according to a preset cycle or according to the ambient light intensity monitored by the ambient light acquisition sensor SQ1. The WIFI and Bluetooth dual-module U2 controls the switching circuit composed of the third MOSFET Q3 and the fourth transistor Q4 to power the pyroelectric infrared sensor U1, activating high-frequency signal transmission only during the detection window to reduce continuous power consumption.

[0067] The second power control circuit transmits data to the WIFI and Bluetooth dual-module U2 according to a preset cycle or based on the ambient light intensity monitored by the ambient light acquisition sensor SQ1. The WIFI and Bluetooth dual-module U2 controls the switching circuit composed of the first MOSFET Q1 and the second transistor Q2 to power the 24G radar sensor U3. After the radar detects a suspicious signal, it wakes up the 24G radar sensor U3 to perform secondary verification, thus avoiding energy waste caused by the long-term operation of the 24G radar sensor U3.

[0068] When the ambient light sensor SQ1 detects that the light intensity is below the threshold (such as at night), it automatically extends the working time of the pyroelectric infrared sensor U1 and the 24G radar sensor U3 to improve the detection reliability in low light environments.

[0069] The U2 WIFI and Bluetooth combo module (such as the ESP32 series) serves as the core communication hub, enabling data interaction between local and cloud environments.

[0070] Bluetooth mode: Used for short-range device pairing and parameter configuration (such as detection sensitivity, working mode). Users send commands via a mobile APP through the button circuit, and the module receives and adjusts the sensor parameters.

[0071] WIFI mode: Data from multiple sensors (such as human presence and ambient light intensity) is uploaded to the cloud server via the antenna circuit, supporting remote monitoring and smart home linkage (such as triggering lights and security alarms).

[0072] The Type-C power supply circuit converts the 5V input to a 3.3V system voltage through the voltage regulator chip U4. The first bidirectional ESD diode BD1 and the filter capacitor prevent voltage surges and electromagnetic interference.

[0073] Ferrite bead isolation design: The first ferrite bead FB1 and the second ferrite bead FB2 are connected in series in the power supply path of the 24G radar sensor U3 to suppress the interference of high-frequency noise on the analog signal link.

[0074] 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 based on Bluetooth and WIFI transmission, characterized in that, include: The circuit includes a WIFI / Bluetooth combo module, an antenna circuit, a Type-C power supply circuit, a pyroelectric infrared sensor circuit, a first power control circuit, a 24G radar sensor circuit, a second power control circuit, an ambient light acquisition circuit, a button circuit, and an LED indicator circuit. The Type-C power supply circuit is connected to the power input terminal of the WIFI and Bluetooth dual-function module and is used to power the WIFI and Bluetooth dual-function module. The WIFI and Bluetooth combo module controls the Type-C power supply circuit to supply power to the ambient light acquisition circuit; The WIFI and Bluetooth dual-function module controls the first power control circuit to supply power to the pyroelectric infrared sensor circuit and controls the second power control circuit to supply power to the 24G radar sensor circuit. The signal output terminal of the ambient light acquisition circuit is connected to the first signal input terminal of the WIFI and Bluetooth dual-function module, and is used to transmit ambient light intensity data to the WIFI and Bluetooth dual-function module. The signal terminals of the pyroelectric infrared sensor circuit and the 24G radar sensor circuit are respectively connected to the first and second signal terminals of the WIFI and Bluetooth dual-function module for transmitting human motion signals and infrared sensing signals to the WIFI and Bluetooth dual-function module. The signal input terminal of the LED indicator circuit is connected to the second signal output terminal of the WIFI and Bluetooth dual-function module, and is used to display status information according to the control instructions of the WIFI and Bluetooth dual-function module. The signal output terminal of the button circuit is connected to the fourth signal input terminal of the WIFI and Bluetooth dual-function module to receive user input commands. The antenna circuit is communicatively connected to the third signal terminal of the WIFI and Bluetooth dual-function module to enable remote data interaction.

2. The human presence detection sensor based on Bluetooth and WIFI transmission according to claim 1, characterized in that, The antenna circuit includes a first inductor, a second inductor, a twenty-fourth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, and an antenna. The first end of the second inductor is connected to the first end of the twenty-eighth capacitor and the LNA_IN terminal of the WIFI-Bluetooth dual-mode module. The second end of the second inductor is connected to the first end of the twenty-seventh capacitor, the first end of the first inductor, and the antenna, and then grounded. The second end of the first inductor is connected to the first end of the twenty-fourth capacitor. The second ends of the twenty-fourth capacitor, the twenty-seventh capacitor, and the twenty-eighth capacitor are all grounded.

3. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 2, characterized in that, The Type-C power supply circuit includes a Type-C interface, a voltage regulator chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a thirteenth resistor, and a first bidirectional ESD diode. The B9 terminal of the Type-C interface is connected to the A9 terminal of the Type-C interface, the first terminal of the first bidirectional ESD diode, the first terminal of the fourteenth capacitor, the first terminal of the seventeenth capacitor, the VIN terminal of the voltage regulator chip, and the CE terminal of the voltage regulator chip. The VOUT terminal of the voltage regulator chip is connected to the first terminal of the fifteenth capacitor, the first terminal of the sixteenth capacitor, and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the VDDA terminal of the WIFI / Bluetooth combo module.

4. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 3, characterized in that, The ambient light acquisition circuit includes an ambient light acquisition sensor, an eighteenth resistor, and a twenty-first capacitor. The collector of the ambient light acquisition sensor is connected to the second end of the thirteenth resistor. The emitter of the ambient light acquisition sensor is connected to the IO16 terminal of the WIFI Bluetooth dual-mode module, the first end of the eighteenth resistor, and the first end of the twenty-first capacitor. The second end of the eighteenth resistor and the second end of the twenty-first capacitor are both grounded.

5. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 3, characterized in that, The first power control circuit includes a first capacitor, a second capacitor, a first MOSFET, a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, and an eighth resistor. The first terminal of the first capacitor is connected to the VOUT terminal of the voltage regulator chip, the first terminal of the fourth resistor, the first terminal of the second capacitor, and the source of the first MOSFET. The second terminal of the fourth resistor is connected to the first terminal of the fifth resistor and the collector of the second transistor. The second terminal of the fifth resistor is connected to the gate of the first MOSFET and the second terminal of the second capacitor. The base of the second transistor is connected to the first terminal of the sixth resistor and the first terminal of the eighth resistor. The second terminal of the eighth resistor is connected to the emitter of the second transistor and then grounded. The second terminal of the sixth resistor is connected to the IO13 terminal of the WIFI / Bluetooth combo module.

6. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 3, characterized in that, The pyroelectric infrared sensor circuit includes a first resistor, a second resistor, a third resistor, a third capacitor, a fourth capacitor, and a pyroelectric infrared sensor. The first end of the second resistor is connected to the drain of the first MOSFET. The second end of the second resistor is connected to the first end of the third capacitor, the first end of the fourth capacitor, and the VDD terminal of the pyroelectric infrared sensor. The second end of the third capacitor is connected to the second end of the fourth capacitor and the VSS terminal of the pyroelectric infrared sensor, and then grounded. The DOCI / INT terminal of the pyroelectric infrared sensor is connected in series with the first resistor and then connected to the IO15 terminal of the Wi-Fi / Bluetooth dual-mode module. The SERIN terminal of the pyroelectric infrared sensor is connected in series with the third resistor and then connected to the IO14 terminal of the Wi-Fi / Bluetooth dual-mode module.

7. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 4, characterized in that, The second power control circuit includes an eighth capacitor, a ninth capacitor, a third MOSFET, a fourth transistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The first terminal of the eighth capacitor is connected to the VOUT terminal of the voltage regulator chip, the first terminal of the ninth resistor, the first terminal of the ninth capacitor, and the source of the third MOSFET. The second terminal of the ninth resistor is connected to the first terminal of the tenth resistor and the collector of the fourth transistor. The second terminal of the tenth resistor is connected to the gate of the third MOSFET and the second terminal of the ninth capacitor. The base of the fourth transistor is connected to the first terminal of the eleventh resistor and the first terminal of the twelfth resistor. The second terminal of the twelfth resistor is connected to the emitter of the fourth transistor and then grounded. The second terminal of the eleventh resistor is connected to the IO12 terminal of the WIFI / Bluetooth combo module.

8. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 4, characterized in that, The 24G radar sensor circuit includes a first ferrite bead, a second ferrite bead, a 24G radar sensor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, and a thirteenth capacitor. The first terminal of the tenth capacitor is connected to the first terminal of the second ferrite bead and the drain of the third MOSFET. The second terminal of the second ferrite bead is connected to the first terminals of the eleventh, twelfth, and thirteenth capacitors and the VIN terminal of the 24G radar sensor. The GND terminal of the 24G radar sensor is grounded after being connected in series with the first ferrite bead. The second terminals of the tenth, eleventh, twelfth, and thirteenth capacitors are all grounded. The SCL / TX terminal of the 24G radar sensor is connected to the IO17 terminal of the WIFI / Bluetooth combined module. The SDA / RX terminal of the 24G radar sensor is connected to the IO18 terminal of the WIFI / Bluetooth combined module. The OUT terminal of the 24G radar sensor is connected to the IO19 terminal of the WIFI / Bluetooth combined module.

9. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 6, characterized in that, The button circuit includes a switch and a twentieth capacitor. The first end of the switch is connected to the IO2 terminal of the WIFI Bluetooth dual-function module and the first end of the twentieth capacitor, respectively. The second end of the switch and the second end of the twentieth capacitor are both grounded.

10. A human presence detection sensor based on Bluetooth and WIFI transmission according to claim 7, characterized in that, The LED indicator circuit includes a first LED, a second LED, a third LED, a sixteenth resistor, a seventeenth resistor, and a nineteenth resistor. The positive terminal of the first LED is connected to the second terminal of the thirteenth 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 sixteenth resistor and then connected to the IO8 terminal of the WIFI / Bluetooth dual-function module. The negative terminal of the second LED is connected in series with the seventeenth resistor and then connected to the IO7 terminal of the WIFI / Bluetooth dual-function module. The negative terminal of the third LED is connected in series with the nineteenth resistor and then connected to the IO6 terminal of the WIFI / Bluetooth dual-function module.

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