Signal processing device and smart home equipment

Abstract

The utility model discloses a signal processing device and smart home equipment, and relates to the technical field of wireless communication. The signal processing device is applied to the smart home equipment, so that the smart home equipment has the functions of a radar and a wireless communication component at the same time. The signal processing device comprises a data processing circuit, a radio frequency synthesis circuit, a frequency mixing circuit, a demodulation circuit and a signal screening circuit. The signal processing device can generate electromagnetic signals, send the electromagnetic signals to the outside of the signal processing device in a wireless transmission mode and receive returned electromagnetic signals so as to identify equipment outside the signal processing device, fusion of radar and wireless communication is achieved, mutual interference between the radar and the wireless communication is avoided, and the reliability of the radar is improved. Meanwhile, the assembly size is reduced, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and particularly to a signal processing device and a smart home device. Background Art

[0002] With the popularization of smart homes, devices have increasingly higher requirements for intelligence and cost. In existing intelligent solutions for microwave radars, wireless communication components (such as Wi-Fi, Bluetooth, Zigbee, 2.4G communication, etc.) are usually used for device communication, and radar components are used for motion detection. After the radar components detect motion, the information is transmitted to other devices through the wireless communication components. Both the wireless communication components and the radar components are wireless transceiver devices operating in the microwave frequency band. When they are close to each other, they are prone to interference with each other, resulting in problems such as packet loss in wireless transceiver and false triggering of radar sensing. In addition, the wireless communication components and the radar components respectively use one or more integrated chips, resulting in high overall costs, and the wireless communication components and the radar components respectively use two sets of antennas, making it difficult to design the overall device in a miniaturized manner. Summary of the Utility Model

[0003] In order to solve the deficiencies of the prior art, the purpose of this application is to provide a signal processing device and a smart home device, enabling the smart home device to simultaneously possess the functions of a radar and a wireless communication component, and realizing the integration of the radar and the wireless communication component.

[0004] To achieve the above purpose, this application adopts the following technical solutions:

[0005] In a first aspect, a signal processing device is provided, which is applied to a smart home device. The signal processing device includes: a data processing circuit for generating a control signal; a radio frequency synthesis circuit connected to the data processing circuit. The radio frequency synthesis circuit generates a corresponding electromagnetic signal based on the control signal and sends the electromagnetic signal to the outside of the signal processing device through an antenna; a mixing circuit connected to the antenna. The mixing circuit receives a first electromagnetic signal sent by another signal processing device through the antenna, or the mixing circuit receives a second electromagnetic signal reflected back by an obstacle through the antenna; a demodulation circuit connected to both the mixing circuit and the data processing circuit. The demodulation circuit demodulates the first electromagnetic signal and generates a communication signal, and the demodulation circuit transmits the communication signal to the data processing circuit. The data processing circuit exchanges data with another signal processing device according to the communication signal; a signal screening circuit connected to both the mixing circuit and the data processing circuit. The signal screening circuit processes the second electromagnetic signal to generate a motion detection signal and transmits the motion detection signal to the data processing circuit. The data processing circuit determines the relative state between the smart home device and the obstacle according to the motion detection signal.

[0006] Further, the signal processing device further includes a power amplifier circuit, which is connected between the mixing circuit and the signal screening circuit.

[0007] Further, the signal screening circuit obtains a motion detection signal according to the frequency difference between the electromagnetic signal and the second electromagnetic signal.

[0008] Further, the data processing circuit obtains the frequency, amplitude, and delay of the motion detection signal, and respectively obtains the following relative states according to the frequency, amplitude, and delay: the distance between the smart home device and the obstacle, the moving speed of the obstacle relative to the smart home device, and the size of the obstacle.

[0009] Further, the antenna includes a first antenna connected to the radio frequency synthesis circuit. The first antenna is connected to the radio frequency synthesis circuit to send the electromagnetic signal to another signal processing device. The second antenna is connected to the mixing circuit to receive the second electromagnetic signal reflected by the obstacle.

[0010] Further, the signal processing device includes a modulation circuit, which is connected between the data processing circuit and the radio frequency synthesis circuit. The modulation and demodulation circuit modulates the electromagnetic signal and then sends it to the radio frequency synthesis circuit.

[0011] Further, the signal processing device further includes a first conversion circuit, which is connected between the modulation circuit and the radio frequency synthesis circuit. The first conversion circuit is used to convert the digital signal generated by the data processing circuit into an analog signal for external transmission.

[0012] Further, the signal processing device further includes a second conversion circuit, which is connected between the demodulation circuit and the mixing circuit. The second conversion circuit is also connected between the signal screening circuit and the data processing circuit. The second conversion circuit is used to convert the analog signal received by the mixing circuit into a digital signal recognizable by the data processing circuit.

[0013] Further, the signal processing device includes a filtering circuit, which is connected between the data processing circuit and the mixing circuit. The filtering circuit is also connected between the mixing circuit and the demodulation circuit.

[0014] In a second aspect, a smart home device is provided, including any one of the signal processing devices in the first aspect above.

[0015] Compared with the prior art, the signal processing device provided by the present application includes a data processing circuit, a radio frequency synthesis circuit, a mixing circuit, a demodulation circuit, and a signal screening circuit. Among them, the data processing circuit is used to generate a control signal. The radio frequency synthesis circuit generates a corresponding electromagnetic signal based on this control signal and sends the electromagnetic signal to the outside of the signal processing device through an antenna. The mixing circuit receives a first electromagnetic signal sent by another signal processing device or a second electromagnetic signal reflected by an obstacle through the antenna. The demodulation circuit demodulates the first electromagnetic signal and generates a communication signal and transmits it to the data processing circuit. The signal screening circuit processes the second electromagnetic signal to generate a motion detection signal to obtain the relative state between obstacles. The signal processing device provided by the present application can generate an electromagnetic signal, send the electromagnetic signal to the outside of the signal processing device in a wireless transmission form, and receive the returned electromagnetic signal, so as to identify the devices outside the signal processing device, realize the integration of radar and wireless communication, avoid the mutual interference between radar and wireless communication, and at the same time reduce the size of components and the cost. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a signal processing device provided by an embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of an antenna in a signal processing device provided by an embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of data exchange between a first smart home device and a second smart home device provided by an embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of a smart home device detecting the state of an obstacle provided by an embodiment of the present application. Detailed Embodiments

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the specific embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0021] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0022] It should also be understood that the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, and / or components.

[0023] As described in the above background art, since both the wireless communication component and the radar component are wireless transceiver devices operating in the microwave frequency band, interference is likely to occur, resulting in problems such as wireless transceiver packet loss and radar sensing false triggering. Moreover, the wireless communication component and the radar component respectively use two sets of antennas, making the device design relatively complex.

[0024] In view of this, the embodiments of this application provide a signal processing device. This signal processing device is applied to smart home devices, enabling smart home devices to simultaneously possess the functions of radar and wireless communication components. The signal processing device includes a data processing circuit, a radio frequency synthesis circuit, a mixing circuit, a demodulation circuit, a signal screening circuit, and an antenna. The data processing circuit is used to generate a control signal. The radio frequency synthesis circuit generates a corresponding electromagnetic signal based on this control signal and sends this electromagnetic signal to the outside of the signal processing device through the antenna. The mixing circuit is used to receive a first electromagnetic signal sent by another signal processing device or a second electromagnetic signal reflected by an obstacle. The demodulation circuit is used to generate a communication signal based on this first electromagnetic signal. The signal screening circuit is used to generate a motion detection signal based on this second electromagnetic signal and finally determine the relative state between the smart home device and the obstacle. The signal processing device provided in this application can generate electromagnetic signals, send the electromagnetic signals to the outside of the signal processing device in a wireless transmission form, and receive the returned electromagnetic signals, thereby identifying the devices outside the signal processing device, realizing the integration of radar and wireless communication, avoiding mutual interference between radar and wireless communication, reducing the size of components, and lowering costs.

[0025] The following describes in detail the signal processing device provided in the embodiments of this application with reference to the drawings.

[0026] Figure 1 It is a schematic structural diagram of a signal processing device 100 provided in the embodiments of this application, asFigure 1 As shown in Figure 1 , the device includes: a data processing circuit 11, a radio frequency synthesis circuit 12, a mixing circuit 13, a demodulation circuit 14, and a signal screening circuit 15.

[0027] The data processing circuit 11 is used to generate a control signal. For example, the data processing circuit 11 can be a Microcontroller Unit (MCU).

[0028] In some embodiments, based on the control signal, to implement the status detection of obstacles by the smart home device, the status detection of obstacles includes but is not limited to detecting the distance between the smart home device and the obstacle, the size of the obstacle, and the moving speed of the obstacle. Optionally, based on the control signal, to implement data exchange between at least two smart home devices.

[0029] As an implementation manner, the data processing circuit 11 can generate a control signal through Pulse Width Modulation (PWM). For example, the data processing circuit 11 can control the power of the digital signal by adjusting the duty cycle of the pulse to generate a control signal.

[0030] The radio frequency synthesis circuit 12 is connected to the data processing circuit 11. The radio frequency synthesis circuit 12 is used to receive the control signal sent by the data processing circuit 11. The radio frequency synthesis circuit 12 generates a corresponding electromagnetic signal based on the control signal, and sends the electromagnetic signal to the outside of the signal processing device through the antenna 16.

[0031] As an implementation manner, the radio frequency synthesis circuit 12 generates electromagnetic signals of different frequencies according to the received control signal, so that the electromagnetic signals can be transmitted at different frequencies to avoid interference between signals and at the same time implement different functions. For example, the electromagnetic signals of different frequencies can be radar detection signals and communication signals, used to detect the presence of other devices and communicate with other devices. Or, the radio frequency synthesis circuit 12 can also divide the generated electromagnetic signals into multiple different frequency bands. For example, long signals, medium signals, and short signals, etc. The radio frequency synthesis circuit 12 sends the generated electromagnetic signals to devices outside the signal processing device 100 through the antenna 16. For example, devices outside the signal processing device 100 can include smart furniture devices, smart furniture central servers, routers, and other devices.

[0032] The mixing circuit 13 is connected to the antenna 16. The mixing circuit 13 receives the first electromagnetic signal sent by another signal processing device through the antenna 16, or the mixing circuit 13 receives the second electromagnetic signal reflected by the obstacle through the antenna 16.

[0033] Among them, the mixing circuit 13 receives a first electromagnetic signal sent by another signal processing device through the antenna 16, and is used to establish a communication connection with a smart home device corresponding to the other signal processing device and perform data transmission.

[0034] As an implementation manner, a smart home device corresponding to another signal processing device sends a first electromagnetic signal to the signal processing device 100. The signal processing device 100 receives the first electromagnetic signal, performs signal parsing and response, so as to transmit and exchange data between devices, thereby completing data synchronization between devices.

[0035] The mixing circuit 13 receives a second electromagnetic signal reflected back by an obstacle through the antenna 16. The second electromagnetic signal is a reflected electromagnetic signal returned when the electromagnetic signal sent through the antenna encounters an obstacle. The second electromagnetic signal is used to generate a motion detection signal corresponding to the obstacle. For specific reference, see the following description of the signal screening circuit 15.

[0036] It should be noted that as Figure 2 shown, the antenna 16 may include a first antenna 161 and a second antenna 162. The first antenna 161 is connected to the radio frequency synthesis circuit 12, and the second antenna 162 is connected to the mixing circuit 13. It can be understood that the first antenna 161 and the second antenna 162 may also be the same antenna, and the present application does not limit the specific implementation manner of the antenna.

[0037] The demodulation circuit 14 is respectively connected to the mixing circuit 13 and the data processing circuit 11. The demodulation circuit 14 is used to demodulate the first electromagnetic signal and generate a communication signal. Then, the demodulation circuit 14 transmits the communication signal to the data processing circuit 11, and the data processing circuit 11 performs data transmission or exchange with another signal processing device 100 according to the communication signal.

[0038] The signal screening circuit 15 is respectively connected to the mixing circuit 13 and the data processing circuit 11. The signal screening circuit 15 processes the second electromagnetic signal to generate a motion detection signal, and transmits the motion detection signal to the data processing circuit 11. The data processing circuit 11 determines the relative state between the smart home device and the obstacle according to the motion detection signal.

[0039] As an implementation manner, the mixing circuit 13 receives the second electromagnetic signal reflected back by the obstacle and sends it to the signal screening circuit 15. The signal screening circuit 15 receives the second electromagnetic signal and generates a motion detection signal according to the frequency difference between the electromagnetic signal and the second electromagnetic signal.

[0040] Exemplarily, the motion detection signal includes data such as frequency, amplitude, and delay. Accordingly, the data processing circuit 11 acquires the motion detection signal and generates the relative state between the smart home device and the obstacle based on the data such as frequency, amplitude, and delay in the motion detection signal. For example, the relative state between the smart home device and the obstacle includes the distance between the smart home device and the obstacle, the moving speed of the obstacle relative to the smart home, and the size of the obstacle.

[0041] It should be noted that the smart home device can detect the moving obstacle according to the motion detection signal when transmitting and receiving electromagnetic signals. The smart home device can also perform time-sharing detection, such as performing motion detection on the obstacle during the time gap other than when transmitting and receiving electromagnetic signals, effectively avoiding the interference of transmitting and receiving electromagnetic signals on motion detection.

[0042] In some embodiments, in addition to the modules or units described above, the signal processing device 100 further includes a power amplifier circuit 17, a modulation circuit 18, a first conversion circuit 19, a second conversion circuit 20, and a filter circuit 21.

[0043] Among them, the power amplifier circuit 17 is connected between the mixer circuit 13 and the signal screening circuit 15. The power amplifier circuit 17 is used to amplify the second electromagnetic signal with weak signal and small power to the power that can meet the operation of the signal screening circuit 15, so as to enhance the signal strength of the second electromagnetic signal.

[0044] The power amplifier circuit 17 can not only amplify the input signal to the power that meets the operation of the signal screening circuit 15, but also improve the stability and flexibility of the signal processing device 100.

[0045] The modulation circuit 18 is connected between the data processing circuit 11 and the radio frequency synthesis circuit 12. The modulation circuit 18 is used to modulate the electromagnetic signal and then send it to the radio frequency synthesis circuit 12 to adapt to the transmission characteristics of the electromagnetic signal.

[0046] Exemplarily, the modulation of the electromagnetic signal by the modulation circuit 18 can be to modulate one or more parameters (such as amplitude, frequency, phase, etc.) of the low-frequency signal of the electromagnetic signal into a high-frequency signal, so as to adapt to the transmission characteristics of the electromagnetic signal.

[0047] The modulation circuit 18 can ensure that the electromagnetic signal can be effectively transmitted in the channel. By modulating the electromagnetic signal, the performance of the signal processing device 100 is optimized, meeting the requirements of the signal processing device 100 in different application scenarios.

[0048] The first conversion circuit 19 is connected between the modulation circuit 18 and the radio frequency synthesis circuit 12. The first conversion circuit 19 is used to convert the digital signal generated by the data processing circuit 11 into an analog signal that can be transmitted outward. For example, the first conversion circuit 19 can be a digital-to-analog converter (DAC).

[0049] A second conversion circuit 20. The second conversion circuit 20 is connected between the demodulation circuit 14 and the mixing circuit 13. The second conversion circuit 20 is also connected between the signal screening circuit 15 and the data processing circuit 11. The second conversion circuit 20 is used to convert the analog signal received by the mixing circuit 13 into a digital signal that can be recognized by the data processing circuit 11. For example, the second conversion circuit 20 can be an analog-to-digital converter (ADC).

[0050] The first conversion circuit 19 and the second conversion circuit 20 convert signals of different voltage levels or different types into signals suitable for subsequent processing, such as converting an analog signal into a digital signal, or converting a digital signal into an analog signal, greatly improving the accuracy, stability, and flexibility of signal processing.

[0051] A filtering circuit 21. The filtering circuit 21 is connected between the data processing circuit 11 and the mixing circuit 13. The filtering circuit 21 is also connected between the mixing circuit 13 and the demodulation circuit 14. The filtering circuit 21 is used to perform filtering processing on the electromagnetic signal and the first electromagnetic signal, such as signal purification, frequency selection, channel selection, and interference suppression.

[0052] By effectively managing the frequency content of the electromagnetic signal and the first electromagnetic signal, the filtering circuit 21 not only improves the efficiency and accuracy of signal processing, but also ensures the stability and reliability of the signal processing device 100.

[0053] Based on the above solution, an embodiment of the present application provides a signal processing device, which is applied to a smart home device, enabling the smart home device to have the functions of both a radar and a wireless communication component at the same time. Among them, the signal processing device includes a data processing circuit, a radio frequency synthesis circuit, a mixing circuit, a demodulation circuit, a signal screening circuit, and an antenna. The data processing circuit is used to generate a control signal, and the radio frequency synthesis circuit generates a corresponding electromagnetic signal based on the control signal and sends the electromagnetic signal outside the signal processing device through the antenna. The mixing circuit is used to receive a first electromagnetic signal sent by another signal processing device or a second electromagnetic signal reflected by an obstacle. The demodulation circuit is used to generate a communication signal according to the first electromagnetic signal. The signal screening circuit is used to generate a motion detection signal according to the second electromagnetic signal, and finally determine the relative state between the smart home device and the obstacle. The signal processing device provided by the present application can generate an electromagnetic signal, send the electromagnetic signal outside the signal processing device in the form of wireless transmission, and receive the returned electromagnetic signal, so as to identify the device outside the signal processing device, realize the integration of radar and wireless communication, avoid the mutual interference between radar and wireless communication, and at the same time reduce the component size and cost.

[0054] Figure 3 It is a schematic diagram of data exchange between a first smart home device 31 and a second smart home device 32 provided by an embodiment of the present application.

[0055] Among them, the first smart home device 31 and the second smart home device 32 correspond to different signal processing devices.

[0056] As an implementation, as Figure 3 shown, referring to the above Figure 1 description, the first smart home device 31 sends a first electromagnetic signal to the second smart home device 32. Correspondingly, the second smart home device 32 receives the first electromagnetic signal, thereby establishing a communication connection between the first smart home device 31 and the second smart home device 32, and further realizing data exchange between different smart home devices.

[0057] Figure 4 It is a schematic diagram of a smart home device 41 detecting the state of an obstacle 42 provided by an embodiment of the present application.

[0058] As Figure 4As shown, the smart home device 41 sends an electromagnetic signal to the obstacle 42. Correspondingly, after receiving the electromagnetic signal, the obstacle 42 sends a reflected second electromagnetic signal to the smart home device 41. To achieve the status detection of the obstacle 42 by the smart home device 41. For example, the status detection of the obstacle 42 by the smart home device 41 includes, but is not limited to, detecting the distance between the smart home device 41 and the obstacle 42, the size of the obstacle 42, and the moving speed of the obstacle 42.

[0059] Exemplarily, the smart home device 41 can calculate the time difference between the emitted electromagnetic signal and the returned second electromagnetic signal, and then calculate the flight time of the electromagnetic signal, so as to determine the distance between the smart home device 41 and the obstacle 42.

[0060] The smart home device 41 can detect the size of the obstacle 42 by emitting an electromagnetic signal and receiving the reflected second electromagnetic signal to generate point cloud data of the environment, and preprocessing the point cloud data, including removing noise, point cloud filtering, and ground segmentation, etc., so as to detect the exact position of the obstacle 42 (such as the x, y, z coordinates of the obstacle).

[0061] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above division of each circuit is used as an example. In practical applications, the above functions can be allocated to different circuits according to needs, that is, the internal structure of the signal processing device is divided into different circuits to complete all or part of the functions described above.

[0062] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application.

Claims

1. A signal processing device, applied to smart home equipment, characterized in that: include: A data processing circuit for generating a control signal; A radio frequency synthesis circuit, the radio frequency synthesis circuit is connected to the data processing circuit, the radio frequency synthesis circuit generates a corresponding electromagnetic signal based on the control signal, and sends the electromagnetic signal to the outside of the signal processing device through an antenna; A mixing circuit, the mixing circuit is connected to the antenna, the mixing circuit receives a first electromagnetic signal sent by another signal processing device through the antenna, or the mixing circuit receives a second electromagnetic signal reflected by an obstacle through the antenna; a demodulation circuit, the demodulation circuit being connected to the mixing circuit and the data processing circuit respectively, the demodulation circuit demodulating the first electromagnetic signal and generating a communication signal, the demodulation circuit transmitting the communication signal to the data processing circuit, and the data processing circuit exchanging data with another signal processing device according to the communication signal; A signal filtering circuit, wherein the signal filtering circuit is respectively connected to the mixing circuit and the data processing circuit, the signal filtering circuit processes the second electromagnetic signal to generate a motion detection signal, and transmits the motion detection signal to the data processing circuit, and the data processing circuit determines the relative state between the smart home device and the obstacle according to the motion detection signal.

2. The signal processing device according to claim 1, characterized in that The signal processing device further includes a power amplifier circuit, which is connected between the frequency mixing circuit and the signal filtering circuit.

3. The signal processing device according to claim 1, characterized in that: The signal screening circuit obtains the motion detection signal according to the frequency difference between the electromagnetic signal and the second electromagnetic signal.

4. The signal processing device according to claim 1, characterized in that: The data processing circuit obtains the frequency, amplitude, and delay of the motion detection signal, and obtains the following relative states according to the frequency, amplitude, and delay respectively: The distance between the smart home device and the obstacle, the moving speed of the obstacle relative to the smart home device, and the size of the obstacle.

5. The signal processing device according to claim 1, characterized in that: The antenna includes a first antenna and a second antenna, the first antenna is connected to the radio frequency synthesis circuit to send the electromagnetic signal to another signal processing device, and the second antenna is connected to the mixing circuit to receive the second electromagnetic signal reflected back by the obstacle.

6. The signal processing device according to claim 1, characterized in that: The signal processing device comprises a modulation circuit, which is connected between the data processing circuit and the radio frequency synthesis circuit. The modulation circuit modulates the electromagnetic signal and then sends it to the radio frequency synthesis circuit.

7. The signal processing device according to claim 6, characterized in that: The signal processing device also includes a first conversion circuit, which is connected between the modulation circuit and the radio frequency synthesis circuit, and is used to convert the digital signal generated by the data processing circuit into an analog signal to be sent outward.

8. The signal processing device according to claim 1, characterized in that: The signal processing device also includes a second conversion circuit, which is connected between the demodulation circuit and the mixing circuit. The second conversion circuit is also connected between the signal filtering circuit and the data processing circuit. The second conversion circuit is used to convert the analog signal received by the mixing circuit into a digital signal recognized by the data processing circuit.

9. The signal processing device according to claim 1, characterized in that: The signal processing device comprises a filter circuit, which is connected between the data processing circuit and the radio frequency synthesis circuit, and is also connected between the frequency mixing circuit and the demodulation circuit.

10. A smart home device, comprising the signal processing device according to any one of claims 1 to 9.

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