A non-contact multi-modal human sensing detection device

Abstract

The utility model discloses a kind of non-contact multi-modal human response detection devices, including shell, the inside of the shell is equipped with central control module, thermal imaging module, millimeter wave radar and communication module, central control module is electrically connected with thermal imaging module, millimeter wave radar and communication module respectively, the bottom of shell is equipped with travelling mechanism, travelling mechanism includes motor drive module and travelling motor, travelling motor is electrically connected with central control module by motor drive module, in the utility model, infrared thermal imaging sensor and millimeter wave radar can realize the real-time detection to front static and dynamic object, improve the reliability of detection;Infrared thermal imaging sensor and millimeter wave radar optical axis present 15 ° angle of inclusion, can reduce detection blind area, improve the accuracy of detection;The duty cycle of time-sharing power supply circuit output is 0.8 DC voltage, and DC voltage closing time is 100ms, can realize millimeter wave radar continuous low-power consumption operation, improve the practicability of device.

Description

Technical Field

[0001] This utility model relates to the field of smart home sensing technology, specifically to a non-contact multimodal human body sensing and detection device. Background Technology

[0002] Smart home is a residential platform that integrates facilities related to home life using comprehensive wiring technology, network communication technology, security technology, automatic control technology, and audio-visual technology. It builds an efficient management system for residential facilities and daily household affairs, improves home security, convenience, comfort, and aesthetics, and achieves an environmentally friendly and energy-saving living environment.

[0003] Existing smart home systems have the following problems: 1. They use traditional PIR sensors, which cannot detect stationary human bodies and are easily interfered with by pets; 2. They use a single millimeter-wave radar, which can easily lead to a high false alarm rate in high-temperature environments; 3. They adopt a strategy of deploying multiple sensors separately, which causes data asynchrony and detection delays.

[0004] In summary, a non-contact multimodal human body sensing and detection device was designed. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this utility model provides a non-contact multimodal human body sensing and detection device.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A non-contact multimodal human body sensing and detection device includes a housing. Inside the housing are a central control module, a thermal imaging module, a millimeter-wave radar, and a communication module. The central control module is electrically connected to the thermal imaging module, the millimeter-wave radar, and the communication module. The bottom of the housing is provided with a traveling mechanism, which includes a motor drive module and a traveling motor. The traveling motor is electrically connected to the central control module through the motor drive module.

[0008] The thermal imaging module includes an infrared thermal imaging sensor, which is electrically connected to the central control module. The infrared thermal imaging sensor and the millimeter-wave radar are driven by a drive shaft to move on the front end of the housing. The infrared thermal imaging sensor and the optical axis of the millimeter-wave radar are at a 15° angle.

[0009] Preferably, the central control module includes a main control chip, model STM32H743, which supports double-precision FPU and DSP instruction sets, and is suitable for complex mathematical operations and signal processing storage and interface, thereby enabling rapid processing of data from infrared thermal imaging sensors and millimeter-wave radar.

[0010] Preferably, the infrared thermal imaging sensor is an MLX90640 with 32*24 pixels and a horizontal field of view of 55°. The MLX90640 has a detection accuracy of ±1°C and supports a temperature measurement range from -40°C to 300°C. It also provides two field of view options (55°×35° and 110°×75°) to adapt to long-distance or short-distance measurement needs. This patent uses a 55°×35° field of view.

[0011] Preferably, the millimeter-wave radar is a TI IWR6843 model, with an operating frequency of 60 GHz and a detection range of 0.5-5 m.

[0012] Preferably, the millimeter-wave radar is electrically connected to a time-division power supply circuit, which outputs a DC voltage with a duty cycle of 0.8 and a DC voltage off time of 100ms.

[0013] Preferably, the communication module includes one or more communication methods such as Wi-Fi, Bluetooth, Zigbee, Thread, Rola, RS485, and KNX, which can enable the device to wirelessly connect with external terminals and also diversify the communication methods for external terminals, thus improving the practicality of the device.

[0014] Preferably, the traveling mechanism includes a traveling motor and a motor drive module. The traveling motor is electrically connected to the central control module through the motor drive module. The central control module sends traveling commands to the motor drive module, and the motor drive module controls the corresponding traveling motor according to the commands.

[0015] Preferably, the drive shaft is electrically connected to a drive motor, which is electrically connected to the central control module through a motor drive module. Similarly, the central control module sends drive commands to the motor drive module, and the motor drive module controls the corresponding drive motor according to the commands.

[0016] The beneficial effects of this utility model are: In this non-contact multimodal human body sensing and detection device:

[0017] 1. Infrared thermal imaging sensors and millimeter-wave radar can achieve real-time detection of static and dynamic objects in front, realizing data synchronization and improving detection reliability; moreover, the infrared thermal imaging sensor and the millimeter-wave radar optical axis are at a 15° angle, which can reduce the detection blind zone and improve the detection accuracy.

[0018] 2. The time-sharing power supply circuit outputs a DC voltage with a duty cycle of 0.8 and a DC voltage off time of 100ms, which enables the millimeter-wave radar to operate continuously with low power consumption, thus improving the practicality of the device. Attached Figure Description

[0019] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a system schematic diagram of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a circuit diagram of the time-sharing power supply circuit of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] like Figures 1-3 As shown, a non-contact multimodal human body sensing detection device includes a housing 1. Inside the housing 1 are a central control module 2, a thermal imaging module 10, a millimeter-wave radar 4, and a communication module 6. The central control module 2 is electrically connected to the thermal imaging module 10, the millimeter-wave radar 4, and the communication module 6. A traveling mechanism is provided at the bottom of the housing 1. The traveling mechanism includes a motor drive module 7 and a traveling motor 8. The traveling motor 8 is electrically connected to the central control module 2 through the motor drive module 7. The thermal imaging module 10 includes an infrared thermal imaging sensor 3, which is electrically connected to the central control module 2. The infrared thermal imaging sensor 3 and the millimeter-wave radar 4 are driven by a drive shaft to move on the front end face of the housing 1. The optical axes of the infrared thermal imaging sensor 3 and the millimeter-wave radar 4 form a 15° angle.

[0025] The device works by using a traveling mechanism to control the movement of the entire device, while a central control module 2 controls and collects data from each module. A thermal imaging module 10 is used to perform thermal imaging of objects in front, enabling heat source detection. A millimeter-wave radar 4 is used to detect objects in front and their movement. Real-time detection of static and dynamic objects in front can be achieved through the infrared thermal imaging sensor 3 and the millimeter-wave radar 4. The central control module 2 can detect human bodies in front by collecting and analyzing the modal data from both the infrared thermal imaging sensor 3 and the millimeter-wave radar 4. The infrared thermal imaging sensor 3 and the millimeter-wave radar 4 are at a 15° angle to each other, which reduces the detection blind zone and improves the accuracy of detection.

[0026] Specifically, the central control module 2 includes a main control chip, model STM32H743, which supports double-precision FPU and DSP instruction sets and is suitable for complex mathematical operations and signal processing storage and interface, thereby enabling it to quickly process data from the infrared thermal imaging sensor 3 and the millimeter-wave radar 4.

[0027] Specifically, the infrared thermal imaging sensor 3 is an MLX90640 with 32*24 pixels. The horizontal field of view of the infrared thermal imaging sensor 3 is 55°. The detection accuracy of the MLX90640 is ±1℃. It supports a temperature measurement range from -40℃ to 300℃ and provides two field of view options (55°×35° and 110°×75°) to adapt to long-distance or short-distance measurement needs. This patent uses a 55°×35° field of view.

[0028] Specifically, the millimeter-wave radar 4 uses the TI IWR6843 model, operates at a frequency of 60GHz, and has a detection range of 0.5-5m.

[0029] Specifically, the millimeter-wave radar 4 is electrically connected to a time-division power supply circuit 5, which outputs a DC voltage with a duty cycle of 0.8 and a DC voltage off time of 100ms, enabling the millimeter-wave radar 4 to operate continuously with low power consumption.

[0030] The time-sharing power supply circuit 5 includes an integrated circuit U1, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a diode D1, a transistor Q1, and a relay K1. The integrated circuit U1 is an NE555. The sixth terminal of the integrated circuit U1 is electrically connected to the second terminal. The sixth terminal of the integrated circuit U1 is connected to an external control DC voltage through the first resistor R1. The control DC voltage is electrically connected to the collector of the transistor Q1 through the coil of the relay K1. The eighth and fourth terminals of the integrated circuit U1 are both electrically connected to the control DC voltage. The second terminal of the integrated circuit U1 is grounded through the first capacitor C1. The first terminal of the integrated circuit U1 is grounded. The fifth terminal of the integrated circuit U1 is grounded through the second capacitor C2. The third terminal of the integrated circuit U1 is electrically connected to the base of the transistor Q1 through the second resistor R2. The diode D1 is connected in anti-parallel to the coil of the relay K1. The emitter of the transistor Q1 is grounded. The relay K1 switch is electrically connected to the power input terminal of the millimeter-wave radar 4. The DC voltage is controlled by a duty cycle circuit based on NE555 to control the on / off time of the DC voltage, thereby controlling the on / off of the millimeter-wave radar 4 and achieving a time-division power supply effect for the millimeter-wave radar 4.

[0031] Specifically, the communication module 6 includes one or more communication methods such as Wi-Fi, Bluetooth, Zigbee, Thread, Rola, RS485, and KNX.

[0032] Specifically, the traveling mechanism includes a traveling motor 8 and a motor drive module 7. The traveling motor 8 is electrically connected to the central control module 2 through the motor drive module 7. The central control module 2 sends traveling commands to the motor drive module 7, and the motor drive module 7 controls the corresponding traveling motor 8 according to the commands.

[0033] Specifically, the drive shaft is electrically connected to a drive motor 9, which is electrically connected to the central control module 2 via a motor drive module 7. Similarly, the central control module 2 sends drive commands to the motor drive module 7, and the motor drive module 7 controls the corresponding drive motor 9 according to the commands.

[0034] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A non-contact multimodal human body sensing and detection device, comprising a housing, characterized in that: The interior of the outer shell is equipped with a central control module, a thermal imaging module, a millimeter-wave radar, and a communication module. The central control module is electrically connected to the thermal imaging module, the millimeter-wave radar, and the communication module. The bottom of the outer shell is equipped with a traveling mechanism, which includes a motor drive module and a traveling motor. The traveling motor is electrically connected to the central control module through the motor drive module. The thermal imaging module includes an infrared thermal imaging sensor, which is electrically connected to the central control module. The infrared thermal imaging sensor and the millimeter-wave radar are driven by a drive shaft to move on the front end of the housing. The infrared thermal imaging sensor and the optical axis of the millimeter-wave radar are at a 15° angle.

2. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The central control module includes a main control chip, which is an STM32H743.

3. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The infrared thermal imaging sensor is an MLX90640 with 32*24 pixels and a horizontal field of view of 55°.

4. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The millimeter-wave radar used is the TI IWR6843, which operates at a frequency of 60 GHz and has a detection range of 0.5-5 m.

5. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The millimeter-wave radar is electrically connected to a time-division power supply circuit, which outputs a DC voltage with a duty cycle of 0.8 and a DC voltage off time of 100ms.

6. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The communication module includes one or more communication methods such as Wi-Fi, Bluetooth, Zigbee, Thread, Rola, RS485, and KNX.

7. The non-contact multimodal human body sensing and detection device according to claim 1, characterized in that: The traveling mechanism includes a traveling motor and a motor drive module, and the traveling motor is electrically connected to the central control module through the motor drive module.

8. The non-contact multimodal human body sensing and detection device according to claim 7, characterized in that: The drive shaft is electrically connected to a drive motor, which is electrically connected to the central control module through a motor drive module.

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