Bluetooth headset, system and gesture recognition method thereof

Abstract

The present invention discloses a Bluetooth headset, a system and a method for gesture recognition thereof. The Bluetooth headset comprises a radar device and a headset processor, wherein the radar device is used to detect hand gestures and the position of the hand relative to the radar device; the headset processor is used to determine whether the first gesture detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the time the hand stays at its position and the time the hand maintains the first preset gesture are within the preset time range. If all are yes, then continue to determine whether the second gesture subsequently detected by the radar device is a second preset gesture. If it is a second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture. The present invention can reduce the probability of radar falsely triggering gesture operations and improve user experience.

Description

Technical Field

[0001] The present invention relates to the field of Bluetooth communications, and in particular to a Bluetooth headset, a system and a gesture recognition method thereof. Background Art

[0002] As the technology of true wireless (TWS) Bluetooth headsets becomes more and more mature, users have higher and higher requirements for the experience of Bluetooth headsets, and the functions of Bluetooth headsets are becoming more and more abundant. Currently, headsets that use radar for gesture operation have appeared.

[0003] Patent document with publication number CN110018471A discloses a multifunctional radar system and its operation method and earphone device, wherein a radar system is set in a Bluetooth earphone, and the radar system can recognize the user's gestures and interpret the gestures into corresponding instructions, thereby realizing corresponding functional operations, such as playing audio, pausing audio, answering calls, etc. The radar system can use a two-dimensional millimeter wave (MMV) phased array radar, which transmits and receives signals in the range of 50GHz to 80GHz.

[0004] However, in the above-mentioned prior art, in order to realize multiple function operations of Bluetooth headsets, it is necessary to set corresponding multiple gestures. In this way, the probability of users inadvertently making gestures corresponding to control operations is greatly increased, thereby increasing the probability of users mistakenly triggering Bluetooth headsets to perform gesture operations, which greatly affects the user experience. Summary of the invention

[0005] In order to solve the defect that the radar of the existing Bluetooth headset is easy to mistakenly trigger the gesture operation, the present invention provides a Bluetooth headset, a system and a gesture recognition method thereof to reduce the probability of the radar mistakenly triggering the gesture operation and improve the user experience.

[0006] A Bluetooth headset comprises a radar device and a headset processor, wherein the radar device is used to detect hand gestures and the position of the hand relative to the radar device; the headset processor is used to determine whether a first gesture detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the time the hand stays at its position and the time the hand maintains the first preset gesture are greater than the first preset time and less than a second preset time; if all are yes, then continue to determine whether a second gesture subsequently detected by the radar device is a second preset gesture; if it is the second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture.

[0007] Preferably, the earphone processor is also used to determine whether the position of the second gesture is within a second preset position range after determining that the second gesture is a second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

[0008] Preferably, the Bluetooth headset further includes an electroacoustic transducer, and the headset processor is further configured to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

[0009] Preferably, the number of the first preset gestures is less than the number of the second preset gestures.

[0010] Preferably, the number of the first preset gestures is one.

[0011] Preferably, the first preset gesture is more complex than the second preset gesture.

[0012] Preferably, the first preset gesture is an open palm with five fingers together.

[0013] Preferably, the second preset gesture includes: the palm is stretched out with the thumb open, and the other four fingers are together; or, the palm is kept stretched out with the thumb open, and the other four fingers are together, and the palm is translated away from or close to the Bluetooth headset; or, the palm is kept stretched out with the thumb open, and the other four fingers are together, and the palm is rotated in a set direction; or, the palm is kept stretched out with five fingers open; or, the palm is kept stretched out with five fingers open, and the palm is rotated in a set direction and then rotated back to near the initial position.

[0014] The present invention also provides a Bluetooth system, including a Bluetooth headset and a mobile device, wherein the Bluetooth headset includes a radar device, a headset processor and a Bluetooth communication module, wherein the radar device is used to detect hand gestures and the position of the hand relative to the radar device; the headset processor is used to determine whether a first gesture detected by the radar device is a first preset gesture, whether the position is within the first preset position range, and whether the length of time the hand stays at its position and the length of time the hand maintains the first preset gesture are greater than the first preset length of time and less than a second preset length of time, and if both are yes, then continue to determine whether a second gesture subsequently detected by the radar device is a second preset gesture, and if it is the second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; the Bluetooth communication module is used to send the instruction to the mobile device; the mobile device is used to receive the instruction and perform corresponding operations according to the instruction.

[0015] Preferably, the earphone processor is also used to determine whether the position of the second gesture is within a second preset position range after determining that the second gesture is a second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

[0016] Preferably, the Bluetooth headset further includes an electroacoustic transducer, and the headset processor is further configured to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

[0017] The present invention also provides a method for Bluetooth headset gesture recognition, wherein the Bluetooth headset includes a radar device and a headset processor, and the method includes the following steps: the headset processor determines whether a first gesture detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the length of time the hand stays at its position and the length of time the hand maintains the first preset gesture are greater than the first preset length of time and less than a second preset length of time; if all of the above are true, then continue to determine whether a second gesture subsequently detected by the radar device is a second preset gesture; if it is a second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture.

[0018] Preferably, the earphone processor also determines whether the position of the second gesture is within the second preset position range after determining that the second gesture is the second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

[0019] Preferably, the Bluetooth headset further includes an electroacoustic transducer, wherein the method further includes the following steps: the headset processor is further configured to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

[0020] The present invention also provides a method for gesture recognition of a Bluetooth system, wherein the Bluetooth system includes a Bluetooth headset and a mobile device, the Bluetooth headset includes a radar device, a headset processor and a Bluetooth communication module, and the method includes the following steps: the radar device detects a hand gesture and the position of the hand relative to the radar device; the headset processor determines whether a first gesture detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the length of time the hand stays at its position and the length of time the hand maintains the first preset gesture are greater than the first preset length and less than a second preset length; if both are yes, then continue to determine whether a second gesture subsequently detected by the radar device is a second preset gesture; if it is the second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture; the Bluetooth communication module sends the instruction to the mobile device; the mobile device receives the instruction and performs corresponding operations according to the instruction.

[0021] Beneficial effects:

[0022] Through the above scheme, the probability of the radar device being accidentally triggered by the hand and performing gesture recognition can be effectively reduced, thereby improving the user experience. Specifically, gesture recognition can be triggered only when the hand is in the first preset position range, which can effectively exclude the user's unintentional actions outside the first preset position range; gesture recognition can be triggered only when the gesture is the first preset gesture, which can effectively exclude the user's unintentional gesture actions outside the first preset gesture; when the gesture maintains the first preset gesture for a duration greater than the first preset duration and less than the second preset duration, gestures that are mistriggered outside the preset duration range can be excluded, such as when the user accidentally places the hand next to the headset and maintains a certain operation gesture for a long time (greater than the preset duration), or accidentally passes the hand in front of the radar device of the Bluetooth headset (for a time less than the preset duration).

[0023] Preferably, in order to realize more functional operations, a larger number of second preset gestures need to be set, and by setting the first preset gestures whose number is much smaller than the second preset gestures, the probability of falsely triggering the radar device 101 for gesture recognition can be further reduced. When the number of the first preset gestures is one and only one, the probability of falsely triggering the radar device can be minimized.

[0024] Preferably, the first preset gesture is more complex than the second preset gesture. For example, compared with the second preset gesture, the first preset gesture requires more fingers to participate in the bending action, or requires more fingers to participate in the bending action, and at least two fingers are bent in different directions, etc. By setting the first preset gesture to be more complex than the second preset gesture, it is more difficult for the radar device to be mistakenly triggered by an unintentional gesture of the user.

[0025] Preferably, the millimeter wave radar device has very low power consumption, and can save the power of the Bluetooth headset to the maximum extent while realizing gesture recognition, which is of great significance for the limited power of the Bluetooth headset. In addition, because the Bluetooth headset and the Bluetooth chip itself are radio frequency circuit structures, the millimeter wave radar can share more functional circuits with the Bluetooth radio frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an embodiment of a Bluetooth system of the present invention;

[0027] Figure 2 A schematic diagram of an embodiment of a Bluetooth headset of the present invention;

[0028] Figure 3 This is a schematic diagram of the application of the Bluetooth headset of the present invention;

[0029] Figure 4 A schematic diagram of an embodiment of a second preset gesture corresponding to a volume control instruction gesture;

[0030] Figure 5 It is a schematic diagram of another embodiment of a volume control gesture corresponding to the second preset gesture;

[0031] Figure 6 A schematic diagram of an embodiment of a second preset gesture corresponding to a song switching instruction gesture;

[0032] Figure 7 A schematic diagram of a more detailed embodiment of a Bluetooth headset of the present invention;

[0033] Figure 8 This is a schematic diagram of data interaction in the Bluetooth system of the present invention. DETAILED DESCRIPTION

[0034] In order to explain the technical solution of the present invention in more detail and to promote further understanding of the present invention, the specific implementation of the present invention is described below in conjunction with the accompanying drawings. However, it should be understood that all exemplary embodiments and their descriptions are used to explain the present invention and do not constitute the sole limitation of the present invention.

[0035] Figure 1 It is a schematic diagram of an embodiment of the Bluetooth system of the present invention, which includes a Bluetooth headset 10 and a mobile device 30, wherein the Bluetooth headset 10 is worn on a person's ear and can receive audio data and control instructions sent from the mobile device 30, and the mobile device 30 can be a smart phone with a Bluetooth communication module. Figure 21 is a schematic diagram of an embodiment of a Bluetooth headset of the present invention. The Bluetooth headset 10 comprises: a radar device 101, a headset processor 102, a Bluetooth communication module 103, a power module 104 and an electroacoustic transducer 105. The power module 104 is used to supply power to the radar device 101, the headset processor 102, the Bluetooth communication module 103 and the electroacoustic transducer 105. The electroacoustic transducer 105 is used to convert the audio data sent by the headset processor 102 into sound.

[0036] The radar device 101 may be a millimeter wave radar device, which emits a conical electromagnetic wave with a wavelength between 1-10 mm and a frequency between 20-100 GHz. The millimeter wave radar device has a large bandwidth, high resolution, and a small antenna component size, and can adapt to harsh environments. The millimeter wave radar device has a simple structure and low cost, and is suitable for FMCW (frequency modulated continuous wave) radar modulation for close-range detection.

[0037] The radar device 101 is used to detect the gesture of the user's hand 20 and the position of the hand 20 relative to the radar device 101; the headset processor 102 is used to determine whether the first gesture detected by the radar device 101 is a first preset gesture, whether the position of the hand 20 is within the first preset position range, and whether the time for the hand 20 to stay at the position of the hand 20 is greater than the first preset time and less than the second preset time (i.e. within the preset time range). If all are yes (i.e. the above three conditions are met), the Bluetooth headset 10 enters a state that can be called a gesture operation, and the headset processor 102 continues to determine whether the second gesture subsequently detected by the radar device 101 is a second preset gesture. If it is a second preset gesture, the headset processor 102 parses the second gesture into an instruction corresponding to the second preset gesture. The instruction can be an instruction executed by the Bluetooth headset 10, or an instruction sent to the mobile device 30 for execution. In the case where the instruction is an instruction executed by the mobile device 30, the Bluetooth communication module 103 sends the relevant instruction to the mobile device 30. The mobile device 30 receives the instruction and performs a corresponding operation according to the instruction; wherein the first preset gesture is different from the second preset gesture.

[0038] Through the above scheme, the probability of the radar device 101 being mistakenly triggered by the hand 20 and performing gesture recognition can be effectively reduced. Specifically, gesture recognition can be triggered only when the position of the hand 20 is within the first preset position range, so that the user's unintentional actions outside the first preset position range can be effectively excluded; gesture recognition can be triggered only when the gesture is the first preset gesture, so that the user's unintentional gesture actions outside the first preset gesture can be effectively excluded; gesture recognition can be triggered only when the length of time the hand stays at its position and the length of time the gesture maintains the first preset gesture are within the preset time range, so that the false triggering of gestures whose duration is outside the preset time range and the false triggering of gestures whose duration is outside the preset time range can be excluded, such as the user accidentally places the hand 20 next to the headset and maintains a certain operation gesture for a long time (i.e., longer than the second preset time), or accidentally passes in front of the radar device 101 of the Bluetooth headset 10 (i.e., the length of time the hand stays at the position is less than the first preset time).

[0039] In order to realize more functional operations, a larger number of second preset gestures need to be set, and by setting the first preset gestures which are much smaller in number than the second preset gestures, the probability of falsely triggering the radar device 101 for gesture recognition is further reduced. In some embodiments, the number of the first preset gestures is one and only one, so as to minimize the probability of falsely triggering the radar device 101.

[0040] Before starting gesture recognition, the Bluetooth headset 10 can be trained for gesture recognition to improve the accuracy of gesture recognition by the Bluetooth headset 10. For example, after the mobile device 30 establishes Bluetooth communication with the Bluetooth headset 10, the gesture recognition training interface is selected on the interface of the mobile device 30, and the preset gesture "palm extended and five fingers together" is selected. The mobile device 30 sends the preset gesture "palm extended and five fingers together" to the Bluetooth headset 10, and then the user makes the corresponding gesture "palm extended and five fingers together" to allow the Bluetooth headset 10 to perform recognition training until the Bluetooth headset 10 can accurately recognize the gesture.

[0041] Figure 3 Schematic diagram of the application of the Bluetooth headset of the present invention. Figure 3 As shown, the first preset gesture may be an outstretched palm with five fingers together; the first preset position range may be: within a set distance (X1) from the electromagnetic wave emission direction of the radar device 101 to the radar device 101, for example, between 5cm-15cm; the preset duration range may be set according to specific applications, for example, between 1-5 seconds, preferably between 1-3 seconds, etc.

[0042] In some embodiments, after the Bluetooth headset 10 enters the gesture operation state, after determining that the second gesture recognized by the radar device 101 is the second preset gesture, it is determined whether the position of the second gesture is within the second preset position range. If it is within the second preset position range, the second gesture is parsed as an instruction corresponding to the second preset gesture. After the Bluetooth headset 10 enters the gesture operation state, the gesture position range recognized by the radar device 101 can be changed to the second preset position range, that is, within the range of the set distance X2 from the electromagnetic wave emission direction of the radar device 101 to the radar device 101, the second preset position range includes and is greater than the above-mentioned first preset position, so that the user can perform gesture operations more freely and comfortably. For example, after entering the gesture operation state, the radar device 101 can recognize gestures at a distance of 0-30cm, and the first preset position range used to trigger whether to enter the gesture operation state is 5-15cm.

[0043] The second preset gesture includes multiple gestures, each gesture corresponds to a corresponding instruction, such as controlling the volume of the Bluetooth headset, prompting to enter the volume control state, switching the song to the next one, prompting to enter the song switching state, etc.

[0044] Figure 4 : is a schematic diagram of an embodiment of a gesture corresponding to a volume control instruction in the second preset gesture. Keep the palm open and the thumb open, and the other four fingers together. The corresponding instruction is: the earphone processor 102 sends prompt audio data to the electroacoustic transducer 105, such as "enter the volume control state", so that the electroacoustic transducer 105 converts the audio data into a prompt sound to prompt the user. Keep the palm open and the thumb open, and the other four fingers together, and the palm moves away from the Bluetooth headset 10. The corresponding instruction is: control the volume to increase; in a preferred embodiment, when the thumb is combined, the corresponding instruction is: the earphone processor 102 sends "volume adjustment ends" audio data to the electroacoustic transducer 105, so that the electroacoustic transducer 105 converts the audio data into a prompt sound to prompt the user. Keep the palm open and the thumb open, and the other four fingers together, and the palm moves toward the Bluetooth headset 10. The corresponding instruction is: control the volume to decrease.

[0045] Figure 5: is a schematic diagram of another embodiment of the volume control gesture corresponding to the second preset gesture. When the palm is extended and the thumb is extended, the other four fingers are together and the palm faces the Bluetooth headset, the corresponding instruction is: the headset processor 102 sends prompt audio data to the electroacoustic transducer 105, such as "enter volume control state". When the palm is extended and the thumb is extended, the other four fingers are together and the palm faces the Bluetooth headset, the palm slowly rotates toward the Bluetooth headset 10, and the corresponding instruction is: control volume increase. When the palm is extended and the thumb is extended, the other four fingers are together, the palm slowly rotates away from the Bluetooth headset 10, and the corresponding instruction is: control volume decrease.

[0046] Figure 6 It is a schematic diagram of an embodiment of the song switching instruction gesture corresponding to the second preset gesture. Keep your palm open and five fingers open. The corresponding instruction is: the headphone processor 102 sends the prompt "enter the song switching state" audio data to the electroacoustic transducer 105, so that the electroacoustic transducer 105 converts the audio data into a prompt sound to prompt the user. Keep your palm open and five fingers open, quickly rotate between 30°-50° in the direction of the Bluetooth headset 10, and then quickly rotate back to the vicinity of the initial position (for example, the position range within plus or minus 5° from the initial position). The corresponding instruction is: switch to the next song. Keep your palm open and five fingers open, quickly rotate between 30°-50° away from the Bluetooth headset 10, and then quickly rotate back to the vicinity of the initial position (for example, the position range within plus or minus 5° from the initial position). The corresponding instruction is: switch to the previous song. When the thumbs are combined, the corresponding instruction is: the earphone processor 102 sends the audio data of prompting "song switching is finished" to the electroacoustic transducer 105, so that the electroacoustic transducer 105 converts the audio data into a prompt sound to prompt the user.

[0047] Figure 7 1 is a schematic diagram of a more detailed embodiment of the Bluetooth headset of the present invention, wherein the radar device 101 includes a radar processor 1011 (e.g., a radar processing chip), a radar circuit 1012, a transmitting antenna 1013, and a receiving antenna 1014. The radar processor 1011 and the transmitting antenna 1013 are used to transmit directional electromagnetic waves; when the electromagnetic waves encounter the user's hand 20, they are reflected to the receiving antenna 1014 and received. After being processed by the radar circuit 1012, the electromagnetic waves output information corresponding to the gesture to the radar processor 1012, and the radar processor 1012 processes the information to calculate the corresponding gesture.

[0048] Figure 8This is a schematic diagram of data interaction of the Bluetooth system of the present invention. After the mobile device 30 establishes Bluetooth communication with the Bluetooth headset 10, the mobile device 30 sends a data packet (such as data packet 1, data packet 2, etc.) to the Bluetooth headset 10 through the Bluetooth communication module 103. When the Bluetooth headset 10 receives the data packet, it returns a confirmation packet (ACK packet) to the mobile device 30. The ACK packet may contain the above instructions. When the mobile device 30 receives the ACK packet and parses the instruction, it performs the corresponding operation, for example, after receiving the song switching instruction, it performs the corresponding operation and then sends new data to the Bluetooth headset 10.

[0049] The present invention also provides the above-mentioned method for Bluetooth headset gesture recognition, comprising the following steps:

[0050] S10, the radar device 101 detects the gesture of the hand 20 and the position of the hand 20 relative to the radar device 101;

[0051] S11. The earphone processor 102 is used to determine whether the first gesture detected by the radar device 101 is the first preset gesture, whether the position of the hand is within the first preset position range, and whether the length of time the hand stays at its position and the length of time the hand maintains the first preset gesture are greater than the first preset length of time and less than the second preset length of time. If all are yes, then continue to determine whether the second gesture subsequently detected by the radar device 101 is the second preset gesture. If it is the second preset gesture, then parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture.

[0052] The present invention also provides a method for gesture recognition of the above Bluetooth system, comprising the following steps:

[0053] S20, the radar device 101 detects the gesture of the hand 20 and the position of the hand 20 relative to the radar device 101; the earphone processor 102 is used to determine whether the first gesture detected by the radar device 101 is the first preset gesture, whether the position of the hand is within the first preset position range, and whether the length of time the hand stays at its position and the length of time the hand maintains the first preset gesture are greater than the first preset time and less than the second preset time. If all are yes, continue to determine whether the second gesture subsequently detected by the radar device 101 is the second preset gesture. If it is the second preset gesture, parse the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture. The Bluetooth communication module 103 sends the instruction to the mobile device 30;

[0054] S21. The mobile device 30 receives an instruction and performs corresponding operations according to the instruction.

[0055] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0056] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A Bluetooth headset, worn on a person's ear, comprising a radar device and a headset processor, characterized in that: The radar device is used to detect a hand gesture and a position of the hand relative to the radar device; The headset processor is used to determine whether the first gesture of the hand detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the time the hand stays at its position and the time the hand maintains the first preset gesture are greater than the first preset time and less than the second preset time. If all are yes, continue to determine whether the second gesture of the hand subsequently detected by the radar device is a second preset gesture. If it is the second preset gesture, resolve the second gesture into an instruction corresponding to the second preset gesture; The first preset gesture is different from the second preset gesture.

2. The Bluetooth headset as claimed in claim 1, characterized in that: The earphone processor is also used to determine whether the position of the second gesture is within a second preset position range after determining that the second gesture is a second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

3. The Bluetooth headset as claimed in claim 1, characterized in that: The Bluetooth headset also includes an electroacoustic transducer, and the headset processor is further configured to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

4. The Bluetooth headset as claimed in claim 1, characterized in that: The number of the first preset gestures is less than the number of the second preset gestures.

5. The Bluetooth headset as claimed in claim 4, characterized in that: The number of the first preset gesture is one.

6. The Bluetooth headset as claimed in claim 4, characterized in that: Compared with the second preset gesture, the first preset gesture requires more fingers to participate in the bending action.

7. The Bluetooth headset as claimed in claim 4, characterized in that: Compared with the second preset gesture, the first preset gesture requires more fingers to participate in the bending action, and at least two fingers are bent in different directions.

8. The Bluetooth headset as claimed in claim 1, characterized in that: The second preset gesture includes: Open your palm with your thumb spread and the other four fingers together; or Keeping the palm open with the thumb open and the other four fingers together, the palm moves horizontally away from or towards the Bluetooth headset; or, Keeping your palm open with your thumb spread and the other four fingers together, rotate your palm in the set direction; or, Keep your palm open with your fingers spread; or, Keeping your palm extended and your fingers spread out, rotate your palm in the set direction and then rotate it back to near the initial position.

9. A Bluetooth system, comprising a Bluetooth headset and a mobile device, wherein the Bluetooth headset is worn on a person's ear, comprises a radar device, a headset processor and a Bluetooth communication module, wherein: The radar device is used to detect a gesture of a hand and a position of the hand relative to the radar device; the earphone processor is used to determine whether a first gesture of the hand detected by the radar device is a first preset gesture, whether the position of the hand is within a first preset position range, and whether a time period for which the hand stays at its position and a time period for which the hand maintains the first preset gesture are greater than the first preset time period and less than a second preset time period; if both are yes, then continue to determine whether a second gesture of the hand subsequently detected by the radar device is a second preset gesture; if it is the second preset gesture, then resolve the second gesture into an instruction corresponding to the second preset gesture; The Bluetooth communication module is used to send the instruction to the mobile device; The mobile device is used to receive the instruction and perform corresponding operations according to the instruction.

10. The Bluetooth system as claimed in claim 9, characterized in that: The earphone processor is also used to determine whether the position of the second gesture is within a second preset position range after determining that the second gesture is a second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

11. The Bluetooth system according to claim 10, characterized in that: The Bluetooth headset also includes an electroacoustic transducer, and the headset processor is further configured to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

12. A method for Bluetooth headset gesture recognition, wherein: The Bluetooth headset is worn on a person's ear and includes a radar device and a headset processor. The method includes the following steps: The headset processor determines whether a first gesture of a hand detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the time the hand stays at its position and the time the hand maintains the first preset gesture are greater than the first preset time and less than the second preset time. If both are yes, continue to determine whether a second gesture of the hand subsequently detected by the radar device is a second preset gesture. If it is the second preset gesture, resolve the second gesture into an instruction corresponding to the second preset gesture. The first preset gesture is different from the second preset gesture.

13. The method for Bluetooth headset gesture recognition as claimed in claim 12, characterized in that: The earphone processor also determines whether the position of the second gesture is within the second preset position range after determining that the second gesture is the second preset gesture. If so, the second gesture is parsed into an instruction corresponding to the second preset gesture; wherein the second preset position range includes and is larger than the first preset position range.

14. The method for Bluetooth headset gesture recognition as claimed in claim 12, wherein the Bluetooth headset further comprises an electroacoustic transducer, wherein: The method further comprises the steps of: The earphone processor is also used to issue a voice prompt corresponding to the instruction through the electroacoustic transducer.

15. A method for gesture recognition in a Bluetooth system, wherein: The Bluetooth system includes a Bluetooth headset and a mobile device. The Bluetooth headset is worn on a person's ear and includes a radar device, a headset processor and a Bluetooth communication module. The method includes the following steps: The radar device detects a gesture of a hand and a position of the hand relative to the radar device; The headset processor determines whether the first gesture of the hand detected by the radar device is a first preset gesture, whether the position of the hand is within the first preset position range, and whether the time the hand stays at its position and the time the hand maintains the first preset gesture are greater than the first preset time and less than the second preset time. If all are yes, continue to determine whether the second gesture of the hand subsequently detected by the radar device is a second preset gesture. If it is the second preset gesture, resolve the second gesture into an instruction corresponding to the second preset gesture; wherein the first preset gesture is different from the second preset gesture; The Bluetooth communication module sends the instruction to the mobile device; The mobile device receives the instruction and performs corresponding operations according to the instruction.

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