WO2021042938A1 - 佩戴检测装置 - Google Patents

佩戴检测装置 Download PDF

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Publication number
WO2021042938A1
WO2021042938A1 PCT/CN2020/107768 CN2020107768W WO2021042938A1 WO 2021042938 A1 WO2021042938 A1 WO 2021042938A1 CN 2020107768 W CN2020107768 W CN 2020107768W WO 2021042938 A1 WO2021042938 A1 WO 2021042938A1
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WO
WIPO (PCT)
Prior art keywords
capacitance
antenna
circuit
detection device
electrically connected
Prior art date
Application number
PCT/CN2020/107768
Other languages
English (en)
French (fr)
Inventor
李乔峰
张洵
孔春胜
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2021042938A1 publication Critical patent/WO2021042938A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/105—Manufacture of mono- or stereophonic headphone components

Definitions

  • This application relates to electronic equipment, and more specifically, to a wearing detection device.
  • TWS headsets do not have traditional physical wires, and they also have many intelligent functions, which are widely used.
  • the TWS headset is equipped with a capacitance sensor and a capacitance sensing metal electrode.
  • the capacitance sensing metal electrode and the human body can form a capacitance effect, and the capacitance sensing chip can detect the capacitance change between the capacitance sensing metal electrode and the human body.
  • the wearing detection function For example, when a TWS headset is worn to the ear, the skin of the ear is close to the capacitance sensing metal electrode, which will increase the capacitance value between the capacitance sensing metal electrode and the human body.
  • the capacitance sensing chip detects the increased capacitance value and considers TWS The headset is worn.
  • the capacitance sensing metal electrode needs to have a large enough metal area to form a large capacitance with the human body so that the capacitance can be detected by the capacitance sensing chip.
  • the size of the TWS headset is small and the internal space is limited, making it difficult to enlarge the metal area of the capacitive sensing metal electrode.
  • This application provides a wearing detection device, multiple antennas, using the antenna as a capacitance detection electrode, a capacitance effect can be formed between the antenna and the human body, and without additional electrodes, by detecting the formation between the antenna and the human body
  • the capacitance value of the capacitance value of the wearing detection device is used to detect the wearing state of the wearing detection device.
  • the wearing detection function of the wearing detection device can be realized, the internal space of the wearing detection device can be effectively reduced.
  • the wearing detection device can be reduced.
  • the manufacturing cost of the wearing detection device can be reduced.
  • a wearing detection device in a first aspect, includes:
  • Antenna including the first end
  • the capacitance detection module is used to detect the capacitance value of the capacitance formed between the antenna and the human body, and to determine the wearing state of the wearing detection device according to the capacitance value, and the capacitance detection module includes a capacitance sensor chip
  • the capacitance sensor chip includes a first end, and the first end of the capacitance sensor chip is electrically connected to the first end of the antenna.
  • the wearing detection device reuses the antenna without adding additional electrodes, uses the antenna as a capacitance detection electrode, and electrically connects the capacitance detection module to the antenna, and utilizes the formation between the antenna and the human body.
  • Capacitance effect The capacitance detection module detects the capacitance value of the capacitance formed between the antenna and the human body to detect the wearing state of the wearing detection device. Under the condition that the wearing detection function of the wearing detection device can be realized, the wearing detection function can be effectively reduced.
  • the internal space of the wearing detection device can reduce the size of the wearing detection device on the one hand, and can reduce the manufacturing cost of the wearing detection device on the other hand.
  • the capacitance detection module further includes a first filter circuit for filtering out a first interference signal
  • the first interference signal includes signals other than the signal transmitted between the antenna and the capacitance detection module
  • the first end of the capacitance sensor chip is electrically connected to the first end of the antenna through the first filter circuit.
  • the wearing detection device provided by the present application is provided with a first filter circuit so that the first end of the capacitance sensor chip is electrically connected to the antenna through the first filter circuit, which can effectively filter out interference signals and improve signal quality.
  • the capacitance detection module further includes a first resistor, and the first resistor is connected in series with the first filter circuit.
  • a first resistor connected in series with the first filter circuit is provided, and the first end of the capacitive sensor chip is electrically connected to the antenna through the first resistor and the first filter circuit. Reducing the charging and discharging time of the antenna is convenient for detecting the charging and discharging time of the antenna, so as to obtain the capacitance value between the antenna and the human body.
  • the capacitance detection module further includes a compensation circuit
  • the compensation circuit includes a first terminal and a second terminal
  • the capacitance sensor chip includes a second terminal and a third terminal
  • the first terminal of the compensation circuit It is electrically connected to the third end of the capacitance sensor chip
  • the second end of the compensation circuit is electrically connected to the second end of the capacitance sensor chip.
  • the wearing detection device provided by the present application is provided with a compensation circuit, and through the detection of the compensation circuit by the capacitance sensor chip, the compensation function for the channel between the first end of the capacitance sensor chip and the antenna is realized, so as to reduce the external environment and The influence of factors such as temperature and humidity inside the wearing detection device on capacitance detection improves the detection accuracy of the wearing detection device.
  • the compensation circuit includes a compensation capacitor, the compensation capacitor includes a first end and a second end, the first end of the compensation capacitor is electrically connected to the third end of the capacitance sensor chip, and the compensation The second end of the capacitor is electrically connected to the second end of the capacitance sensor chip, the first end of the compensation capacitor is the first end of the compensation circuit, and the second end of the compensation capacitor is the compensation circuit The second end.
  • the wearing detection device provided by the present application is equipped with a compensation capacitor, and the capacitance sensor chip compares the true value of the compensation capacitor with the measured value, and can measure the relatively accurate capacitance value between the antenna and the human body, thereby realizing the comparison between the antenna and the human body.
  • the compensation function of the channel between the first end of the capacitance sensor chip and the antenna is to reduce the influence of the external environment and the temperature and humidity inside the wearing detection device on the capacitance detection, and to improve the detection accuracy of the wearing detection device.
  • the compensation circuit further includes a second resistor, and the second resistor is connected in series with the compensation capacitor.
  • the wearing detection device provided by the present application is provided with a second resistor connected in series with the compensation capacitor, and the third end of the capacitance sensor chip is electrically connected to the compensation capacitor through the second resistor, which can reduce the charge of the compensation capacitor through the second resistor.
  • the discharge time is convenient for detecting the charging and discharging time of the compensation capacitor, so as to obtain the capacitance value of the compensation capacitor.
  • the compensation circuit further includes a second filter circuit, and the second filter circuit is connected in series with the compensation capacitor.
  • the wearing detection device further includes a wireless module, the wireless module includes a first end, and the first end of the wireless module is electrically connected to the first end of the antenna.
  • the wireless module includes a wireless communication module and a third filter circuit connected in series, and the third filter circuit is used to filter out a second interference signal.
  • the wireless communication module includes a first end
  • the third filter circuit includes a first end and a second end, and the first end of the wireless communication module is connected to The first end of the third filter circuit is electrically connected
  • the second end of the third filter circuit is electrically connected to the first end of the antenna
  • the second end of the third filter circuit is the wireless module The first end.
  • the wearing detection device provided by the present application is provided with a third filter circuit so that the first end of the wireless communication module is electrically connected to the antenna through the third filter circuit, which can effectively filter out interference signals and improve signal quality.
  • the third filter circuit includes a DC blocking circuit for filtering out DC signals
  • the DC blocking circuit includes a first terminal and a second terminal, and the second terminal of the DC blocking circuit is connected to the antenna
  • the first terminal is electrically connected
  • the first terminal of the DC blocking circuit is electrically connected with the first terminal of the wireless communication module
  • the first terminal of the DC blocking circuit is the first terminal of the third filter circuit
  • the second end of the DC blocking circuit is the second end of the third filter circuit.
  • the third filter circuit includes a matching circuit for filtering out signals other than the DC signal in the second interference signal
  • the matching circuit includes a first end and a second end, and the matching circuit The second end is electrically connected to the first end of the antenna, the first end of the matching circuit is electrically connected to the first end of the wireless communication module, and the first end of the matching circuit is the third filter circuit The first end of the matching circuit is the second end of the third filter circuit.
  • the operating frequency of the capacitance detection module is different from the operating frequency of the wireless module.
  • the wearing detection device provided by the present application adopts frequency division multiplexing, so that the working frequency of the capacitance detection module is different from the working frequency of the wireless module, which can effectively reduce the signal sum transmitted between the antenna and the capacitance detection module.
  • the mutual interference between the signals transmitted between the antenna and the wireless module is not limited to
  • the working frequency of the wireless module is a high frequency
  • the working frequency of the capacitance detection module is a low frequency
  • the wearing detection device is a real wireless stereo TWS headset.
  • Fig. 1 is a schematic structural diagram of a TWS headset provided by the present application.
  • FIGS. 2 to 9 are schematic block diagrams of the wearing detection device provided by the present application.
  • 10 to 12 are schematic block diagrams of wireless modules provided in the present application.
  • 13 to 14 are another schematic block diagrams of the wireless module provided in the present application.
  • 15 to 16 are another schematic block diagrams of the wearing detection device provided by the present application.
  • the electrical connection between A and B mentioned in the embodiment of the present application can be understood as a direct electrical connection between A and B, or can be understood as electrical connection between A and B through other components, and the specific form is not limited in any way.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
  • the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
  • the wearing detection device provided in this application may be a device with both wireless communication function and wearing detection function.
  • the wearing detection device is not limited to TWS headsets.
  • the wearing detection device may also be an electronic bracelet, an electronic watch, or a virtual reality.
  • Various devices such as virtual reality (VR) glasses and mobile application augmented reality (AR) glasses.
  • the wearing detection device of the present application multiplexes an antenna, and uses the antenna as a capacitance detection electrode.
  • a capacitance effect can be formed between the antenna and the human body. Without additional electrodes, the capacitance formed between the antenna and the human body can be detected.
  • the wearing detection function of the wearing detection device can be realized, the internal space of the wearing detection device can be effectively reduced.
  • the size of the wearing detection device can be reduced.
  • the manufacturing cost of the wearing detection device can be reduced.
  • Fig. 1 is a schematic structural diagram of a TWS headset provided by the present application. It should be understood that the TWS headset is only an example of the wearing detection device of this application, and should not constitute a limitation to this application.
  • the TWS headset 100 includes an antenna 110, a housing 120, and other modules (not shown in FIG. 1) electrically connected to the antenna 110.
  • the antenna 110 is a metal antenna, and the antenna 110 can be arranged in the housing 120. Surface (as shown in Figure 1) or outer surface. If the antenna 110 is arranged on the outer surface of the housing 120, it can be realized by laser direct structuring (LDS), laser rapid prototyping (LRP) and other technologies.
  • LDS laser direct structuring
  • LRP laser rapid prototyping
  • the outer surface of the antenna 110 is coated There is an insulating protective coating to protect the antenna 110; if the antenna 110 is arranged on the inner surface of the housing 120, it can be realized by LDS, LRP and other technologies, or a flexible printed circuit (FPC) antenna with double-sided adhesive or The glue fixes the antenna 110 to the inner surface of the housing 120 in an adhesive manner.
  • an insulating protective coating to protect the antenna 110; if the antenna 110 is arranged on the inner surface of the housing 120, it can be realized by LDS, LRP and other technologies, or a flexible printed circuit (FPC) antenna with double-sided adhesive or The glue fixes the antenna 110 to the inner surface of the housing 120 in an adhesive manner.
  • FPC flexible printed circuit
  • FIG. 2 is a schematic block diagram of the wearing detection device provided by this application.
  • the wearing detection device 200 includes an antenna 210 and a capacitance detection module 230.
  • the antenna 210 includes a first end 210-1, and can be electrically connected to each module in the wearing detection device 200.
  • the antenna 210 is used to send and receive wireless communication signals, and can also be used as a capacitance detection electrode, and a capacitance can be formed between the antenna 210 and the human body.
  • the capacitance detection module 230 includes a capacitance sensor chip 231.
  • the capacitance sensor chip 231 includes a first end 231-1 and a fourth end 231-4.
  • the first end 231-1 of the capacitance sensor chip 231 is electrically connected to the first end of the antenna 210.
  • One end 210-1, for example, the fourth end 231-4 of the capacitance sensor chip 231 can be electrically connected to the processor (not shown in the figure).
  • the capacitance detection module 230 is used to detect the capacitance value of the capacitance formed between the antenna 210 and the human body, and to determine the wearing state of the wearing detection device 200 according to the capacitance value.
  • the capacitance sensor chip 231 in the capacitance detection module 230 may be used to detect the electrical signal output from the antenna 210 to detect the capacitance value, and determine the wearing state of the wearing detection device 200 according to the capacitance value.
  • the capacitance detection module 230 may further include a processor, which may be electrically connected to the fourth terminal 231-4 of the capacitance sensor chip 231, and the capacitance sensor chip 231 may be used to detect the electrical signal output from the antenna 210 To detect the capacitance value, the processor may determine the wearing state of the wearing detection device 200 according to the capacitance value.
  • the capacitance detection module 230 can detect the wearing state of the wearing detection device 200 according to the change of the detected capacitance.
  • a preset condition may be set. If the capacitance value detected by the capacitance sensor chip 231 meets the preset condition, the wearing detection device 200 is considered to be worn, and if the capacitance value detected by the capacitance sensor chip 231 does not meet the preset condition, With a preset condition, it is considered that the wearing detection device 200 is not worn.
  • the preset condition may be a preset threshold value.
  • the capacitance value detected by the capacitance sensor chip 231 is greater than or equal to the preset threshold value, then the wearing detection device 200 is considered to be worn. If the detected capacitance value is less than the preset threshold, it is considered that the wearing detection device 200 is not worn.
  • the preset condition may be two preset thresholds, denoted as a first preset threshold and a second preset threshold.
  • the first preset threshold is greater than the second preset threshold: if the capacitance sensor chip 231 detects If the capacitance value is greater than the first preset threshold, the wearing detection device 200 is considered to be worn; if the capacitance value detected by the capacitance sensor chip 231 is less than the second preset threshold, it is considered that the wearing detection device 200 is not worn; if the capacitance sensor If the capacitance value detected by the chip 231 is greater than or equal to the second preset threshold and less than or equal to the first preset threshold, it is considered that the wearing state of the wearing detection device 200 is the same as the wearing state of the previous period.
  • the antenna of the present application can be the antenna used for communication between the wearing detection device and other equipment (for example, mobile phone), which is recorded as the first type antenna, or the antenna used for communication between the wearing detection devices used in pairs, which is recorded as the second type antenna
  • the second type of antenna may also be referred to as a retransmission antenna, which is used to retransmit signals from other devices or receive signals retransmitted by the wearing detection device.
  • the paired wearing detection device may be a TWS headset.
  • any headset of the TWS headset may include the first type antenna and/or the second type antenna.
  • the TWS headset includes a main headset and a secondary headset, and the main headset may include a second antenna.
  • the first type of antenna and the second type of antenna either the first type of antenna or the second type of antenna may be used as the capacitance detecting electrode, the pair of earphones may include the second type of antenna, and the second type of antenna may be used as the capacitance detecting electrode.
  • the main earphone receives wireless communication signals sent from other devices through the first type of antenna, the main earphone retains the channel information belonging to its own channel and performs subsequent processing, and forwards the channel information to which the secondary earphone belongs through the second type of antenna ,
  • the secondary earphone retains the channel information forwarded by the main earphone and performs subsequent processing, or the main earphone retains the channel information belonging to its own channel and performs subsequent processing, and copies the channels of the main earphone and the secondary earphone Information, the channel information is forwarded through the second type of antenna, and after receiving the channel information forwarded by the main earphone, the secondary earphone retains the channel information belonging to its own channel and performs subsequent processing.
  • the TWS headset does not use the main headset to forward the channel information of the secondary headset to transmit data.
  • Each headset includes the first type of antenna, and the second antenna is not required.
  • the second type of antenna in this case, the first type of antenna can be used as the capacitance detection electrode, wherein each earphone receives wireless communication signals from other devices through the first type of antenna, and processes the wireless communication signals.
  • the first type of antenna and the second type of antenna may be various types of antennas.
  • the first type of antenna may be a Bluetooth antenna
  • the second type of antenna may be a near field magnetic induction (NFMI) antenna.
  • both the first type antenna and the second type antenna may be Bluetooth antennas or NFMI antennas.
  • the Bluetooth antenna is an antenna that integrates the transmission characteristics of the Bluetooth module, which can connect to other devices (for example, mobile phones) Bluetooth and send and receive wireless communication signals
  • the NFMI antenna is an antenna suitable for NFMI technology to communicate.
  • the compact, low-power, non-propagating magnetic field is used for communication connections and wireless communication signals.
  • the wearing detection device reuses the antenna without adding additional electrodes, uses the antenna as a capacitance detection electrode, and electrically connects the capacitance detection module to the antenna, and utilizes the formation between the antenna and the human body. Capacitance effect, through the capacitance detection module to detect the capacitance value of the capacitance formed between the antenna and the human body to detect the wearing state of the wearing detection device. Under the condition that the wearing detection function of the wearing detection device can be realized, this can be effectively reduced.
  • the internal space of the wearing detection device can reduce the size of the wearing detection device on the one hand, and can reduce the manufacturing cost of the wearing detection device on the other hand.
  • the antenna 210 is used to send and receive signals, and may be electrically connected to the wireless module.
  • FIG. 3 shows another schematic block diagram of the wearing detection device provided by this application.
  • the wearing detection device 200 includes an antenna 210, a wireless module 220, and a capacitance detection module 230.
  • the wireless module 220 includes a first end 220-1 and a second end 220-2.
  • the first end 220-1 of the wireless module 220 is respectively It is electrically connected to the first end 210-1 of the antenna 210 and the first end 231-1 of the capacitance sensor chip 231.
  • the second end 220-2 of the wireless module 220 can be connected to the wearing detection device 200.
  • the processor is electrically connected (not shown in the figure).
  • the wireless module 220 is used to process wireless communication signals sent to or received from the antenna 210.
  • the wireless module 220 may also be used to forward received wireless communication signals; for another example, the wireless module 220 may also be used to modulate or demodulate signals, and encode or decode channels.
  • both the wireless module 220 and the capacitance detection module 230 are electrically connected to the first end 210-1 of the antenna 210, and the signal transmitted to the first end 210-1 of the antenna 210 can be divided into two signals, the first signal
  • the transmission between the wireless module 220 and the antenna 210 may be recorded as a wireless communication signal
  • the second signal transmitted between the capacitance detection module 230 and the antenna 210 may be recorded as a capacitance detection signal.
  • frequency division multiplexing may be used to implement the wireless communication function and the wearing detection function of the wearing detection device 200 at the same time.
  • the operating frequency of the capacitance detection module 230 is different from the operating frequency of the wireless module 220.
  • the working frequency of the wireless module 220 may be a high frequency, and the working frequency of the capacitance detection module 230 may be a low frequency.
  • the working frequency band of the wireless module 220 may be greater than 1 MHz, for example, the working frequency may be a frequency between 10 MHz and 100 MHz.
  • the operating frequency of the capacitance detection module 230 may be a frequency between 1 KHz and 1 MHz.
  • the working frequency of the wireless module 220 may also be a low frequency
  • the working frequency of the capacitance detection module 230 may also be a high frequency, which is not limited in this application. It should be understood that the simultaneous implementation of the wireless communication function and the wearing detection function of the wearing detection device 200 by means of frequency division multiplexing is only a schematic illustration, and should not constitute a limitation to this application.
  • the capacitance A filter circuit is set in the detection module to filter out interference signals.
  • FIG. 4 is another schematic block diagram of the wearing detection device provided by this application. Compared with the embodiment corresponding to FIG. 3, the embodiment corresponding to FIG. 4 adds a first filter circuit 232.
  • the capacitance detection module 230 includes a capacitance sensor chip 231 and a first filter circuit 232 for filtering out the first interference signal, the first interference signal is included in the antenna 210 and the capacitance detection module 230
  • the first filter circuit 232 includes a first terminal 232-1 and a second terminal 232-2.
  • the first terminal 232-1 of the first filter circuit 232 is connected to the capacitance sensor chip 231.
  • the first end 231-1 is electrically connected
  • the second end 232-2 of the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210 and the first end 220-1 of the wireless module 220, respectively.
  • the first end 231-1 of the capacitive sensor chip 231 may be electrically connected between the antenna 210 and the wireless module 220 through the first filter circuit 232.
  • the second end 232-2 of the first filter circuit 232 can be understood as an end where the capacitance detection module 230 is electrically connected to other modules (for example, the antenna 210 and the wireless module 220).
  • the signal transmitted between the antenna 210 and the capacitance detection module 230 may be a useful signal that does not include a noise signal, or may be a useful signal and a noise signal, which is not limited in this application, and the useful signal represents a signal that actually carries data. .
  • the first filter circuit 232 may be an inductor, which is used to pass low frequencies and block high frequencies to reduce wireless communication.
  • the high-frequency signal including the signal interferes with the low-frequency signal transmitted between the antenna and the capacitance detection module to improve the signal quality.
  • the first interference signal may be a high frequency signal.
  • the wearing detection device provided by the present application is provided with a first filter circuit so that the first end of the capacitance sensor chip is electrically connected to the antenna through the first filter circuit, which can effectively filter out interference signals and improve signal quality.
  • the capacitance sensor chip 231 charges and discharges the antenna 210, and at the same time, it can detect the charging and discharging time of the antenna 210 and the voltage change between the antenna 210 and the human body to obtain the capacitance value.
  • the capacitance sensor 231 needs to obtain the charging and discharging time of the antenna 210.
  • a resistor can be set in the capacitance detection module 230. By increasing the resistor, the rate of the charging and discharging time of the antenna 210 is reduced to facilitate the detection of the charging and discharging time. In order to get the capacitance value.
  • FIG. 5 shows another schematic block diagram of the wearing detection device provided by this application. Compared with the embodiment corresponding to FIG. 4, the embodiment corresponding to FIG. 5 adds a first resistance 233.
  • the capacitance detection module 230 includes a capacitance sensor chip 231, a first filter circuit 232 and a first resistor 233, and the first resistor 233 is connected to the first filter circuit 232 in series.
  • the first end 231-1 of the capacitive sensor chip 231 is electrically connected between the wireless module 220 and the antenna 210 through the first resistor 233 and the first filter circuit 232.
  • the value range of the first resistor 233 may be 100 ohms to 1 kiloohm (100 ⁇ to 1K ⁇ ).
  • the first resistor 233 can be provided between the capacitance sensor chip 231 and the first filter circuit 232, or the first filter circuit 232 is arranged between the capacitance sensor chip 231 and the first resistor 233, and there is no limitation here.
  • the first resistor 233 includes a first terminal 233-1 and a second terminal 233-2, the first terminal 233-1 of the first resistor 233 and the first terminal 231 of the capacitance sensor chip 231 -1 is electrically connected, and the second end 233-2 of the first resistor 233 is electrically connected to the first end 232-1 of the first filter circuit 232. That is, in the schematic diagram shown in FIG. 5, the first resistor 233 is provided between the capacitance sensor chip 231 and the first filter circuit 232.
  • connection relationship between the first resistor 233 and the first filter circuit 232 shown in FIG. 5 is only a schematic illustration, and should not be limited to this application.
  • the first end 233-1 of the first resistor 233 is electrically connected to the second end 232-2 of the first filter circuit 232, and the second end 233-2 of the first resistor 233 is respectively connected to the first end of the antenna 210.
  • the first filter circuit 232 is arranged between the capacitance sensor chip 231 and the first resistor 233, and the second end 233-2 of the first resistor 233 It can be understood as one end of the electrical connection between the capacitance detection module 230 and other modules (for example, the antenna 210 and the wireless module 220).
  • a first resistor connected in series with the first filter circuit is provided, and the first end of the capacitive sensor chip is electrically connected to the antenna through the first resistor and the first filter circuit. Reducing the charging and discharging time of the antenna is convenient for detecting the charging and discharging time of the antenna, so as to obtain the capacitance value between the antenna and the human body.
  • the capacitance detection module 230 may also not require the first filter circuit 232, and includes the capacitance sensor chip 231 and the first resistor 233, and the first end 233-1 of the first resistor 233 and the capacitance sensor chip The first end 231-1 of the 231 is electrically connected, and the second end 233-2 of the first resistor 233 is electrically connected to the first end 220-1 of the wireless module 220 and the first end 210-1 of the antenna 210, respectively.
  • the capacitance sensor chip In this application, changes in the external environment and changes in factors such as temperature inside the wearing detection device will affect the accuracy of capacitance detection between the antenna and the human body.
  • compensation can be set in the capacitance detection device.
  • one end of the capacitance sensor chip is electrically connected to the compensation circuit to realize the compensation function of the circuit.
  • the capacitance sensor chip may have two channels.
  • One end (for example, the first end) of the capacitance sensor chip is electrically connected between the antenna and the wireless module to form one of the channels, which is recorded as the capacitance detection channel, and the capacitance transmission
  • the other end of the sensor chip is electrically connected to the compensation circuit, and the compensation function of the circuit is realized through the compensation circuit to form a channel with compensation function, which is recorded as the compensation channel.
  • the compensation channel will be described with reference to Figs. 6-9.
  • FIG. 6 shows another schematic block diagram of the wearing detection device provided by this application. Compared with the embodiments corresponding to FIG. 3 to FIG. 5, the embodiment corresponding to FIG. 6 adds a compensation circuit 237.
  • the capacitance detection module 230 further includes a compensation circuit 237.
  • the compensation circuit 237 includes a first terminal 237-1 and a second terminal 237-2.
  • the capacitance sensor chip 231 includes a second terminal 231-2 and a second terminal 231-2. Three terminals 231-3, the first terminal 237-1 of the compensation circuit 237 is electrically connected to the third terminal 231-3 of the capacitance sensor chip 231, and the second terminal 237-2 of the compensation circuit 237 is electrically connected to the third terminal 231-3 of the capacitance sensor chip 231.
  • the two ends 231-2 are electrically connected.
  • the second end 237-2 of the compensation circuit 237 and the second end 231-2 of the capacitance sensor chip 231 are both grounded, so as to realize the connection between the second end 237-2 of the compensation circuit 237 and the capacitance sensor.
  • the electrical connection between the second end 231-2 of the chip 231 forms a loop between the compensation circuit and the two ends of the capacitance sensor chip.
  • the second terminal 237-2 of the compensation circuit 237 and the second terminal 231-1 of the capacitance sensor chip 231 may not be grounded, and the second terminal 237-2 of the compensation circuit 237 and the second terminal 237-2 of the capacitance sensor chip 231 may not be grounded.
  • the two ends 231-1 may be directly electrically connected, or may be electrically connected through other components, to finally form a loop between the compensation circuit 237 and the two ends of the capacitance sensor chip 231, which is not limited in this application.
  • the compensation circuit 237 can compensate for the influence of changes in the external environment and the internal factors of the wearing detection device, such as temperature or humidity, on the capacitance detection.
  • the compensation circuit 237 may include a temperature sensor, and two ends of the temperature sensor are respectively electrically connected to the second end 231-2 and the third end 231-3 of the capacitance sensor chip 231 to compensate for the capacitance detection due to temperature changes. Impact.
  • the compensation circuit 237 may also include a compensation capacitor. The two ends of the compensation capacitor are respectively electrically connected to the second end 231-2 and the third end 231-3 of the capacitance sensor chip 231 to compensate for temperature and humidity. The influence of the change of various factors on capacitance detection.
  • the wearing detection device provided by the present application is provided with a compensation circuit, and through the detection of the compensation circuit by the capacitance sensor chip, the compensation function for the channel between the first end of the capacitance sensor chip and the antenna is realized, so as to reduce the external environment and The influence of factors such as temperature and humidity inside the wearing detection device on capacitance detection improves the detection accuracy of the wearing detection device.
  • the compensation circuit includes a compensation capacitor as an example to further explain the compensation circuit.
  • FIG. 7 is another schematic block diagram of the wearing detection device provided by this application.
  • the compensation circuit 237 in the embodiment corresponding to FIG. 7 may include a compensation capacitor 234.
  • the compensation circuit 237 includes a compensation capacitor 234, the compensation capacitor 234 includes a first terminal 234-1 and a second terminal 234-2, the first terminal 234-1 of the compensation capacitor 234 and the capacitance sensor chip 231
  • the third end 231-3 of the compensation capacitor 234 is electrically connected, and the second end 234-2 of the compensation capacitor 234 is electrically connected to the second end 231-2 of the capacitance sensor chip 231.
  • the first terminal 234-1 of the compensation capacitor 234 can be understood as the first terminal 237-1 of the compensation circuit 237, and the second terminal 234-2 of the compensation capacitor 234 can be understood as the second terminal 237-2 of the compensation circuit 237.
  • the second end 234-2 of the compensation capacitor 234 and the second end 231-2 of the capacitance sensor chip 231 are both grounded, so as to realize the connection between the second end 234-2 of the compensation capacitor 234 and the capacitance sensor.
  • the electrical connection between the second end 231-2 of the chip 231 forms a loop between the compensation capacitor 234 and the two ends of the capacitance sensor chip 231.
  • the second end 234-2 of the compensation capacitor 234 and the second end 231-1 of the capacitance sensor chip 231 may not be grounded, and the second end 234-2 of the second end 234-2 of the compensation capacitor 234 and The second end 231-1 of the capacitance sensor chip 231 may be directly electrically connected, or may be electrically connected through other components, to finally form a loop between the compensation capacitor 234 and the two ends of the capacitance sensor chip 231, which is not limited in this application. .
  • the capacitance value of the compensation capacitor 234 is fixed and known.
  • the capacitance value of the compensation capacitor 234 may range from 1 picofarad to 200 picofarads (1 pF to 200 pF).
  • the capacitance sensor chip 231 can detect the capacitance value of the compensation capacitor 234, and record the obtained capacitance value of the compensation capacitor 234 as a measured value. By comparing the true value of the compensation capacitor 234 with the measured value, it can be estimated The influence of the external environment and the inside of the wearing detection device on the capacitance detection is taken as a consideration factor of the capacitance value between the current detection antenna and the human body, so as to realize the compensation function for the capacitance detection channel.
  • the true value of the compensation capacitor is 100 picofarads
  • the measured value of the compensation capacitor is 80 picofarads
  • the ratio of the difference between the measured value and the true value to the true value is 0.2
  • the measured antenna is between the human body
  • the capacitance value of is 120 picofarads
  • the wearing detection device provided by the present application is provided with a compensation capacitor, and the true value of the compensation capacitor is compared with the measured value through the capacitance sensor chip, and a relatively accurate capacitance value between the antenna and the human body can be measured, and the comparison is achieved.
  • the compensation function of the channel between the first end of the capacitance sensor chip and the antenna is to reduce the influence of the external environment and the temperature and humidity inside the wearing detection device on the capacitance detection, and to improve the detection accuracy of the wearing detection device.
  • the compensation circuit of the present application can not only be provided with a compensation capacitor, but also can be provided with the same components as the capacitance detection channel.
  • the compensation circuit may also be provided with a resistance; for another example, if the capacitance detection channel is provided with a filter circuit, the compensation circuit may also be provided with a filter circuit.
  • FIG. 8 is another schematic block diagram of the wearing detection device provided by this application. Compared with the embodiment corresponding to FIG. 7, the embodiment corresponding to FIG. 8 adds a second resistance 235.
  • the compensation circuit 237 includes a compensation capacitor 234 and a second resistor 235, and the second resistor 235 is connected in series with the compensation capacitor 234.
  • the third terminal 231-3 of the capacitance sensor chip 231 is electrically connected to the compensation capacitor 234 through the second resistor 235.
  • the present application does not make any limitation on the positional relationship between the compensation capacitor 234 and the second resistor 235.
  • the second resistor 235 may be disposed between the capacitance sensor chip 231 and the compensation capacitor 234; for another example, the compensation capacitor 234 may be disposed between the capacitance sensor chip 231 and the second resistor 235.
  • the second resistor 235 includes a first terminal 235-1 and a second terminal 235-2, the first terminal 235-1 of the second resistor 235 and the third terminal 231 of the capacitance sensor chip 231 -3 is electrically connected, the second end 235-2 of the second resistor 235 is electrically connected to the first end 234-1 of the compensation capacitor 234, the second end 234-2 of the compensation capacitor 234 is grounded, and the second end of the capacitance sensor chip 231 is grounded.
  • the terminal 231-2 is grounded.
  • the second end 234-2 of the compensation capacitor 234 can be understood as the second end 237-2 of the compensation circuit 237, and the first end 235-1 of the second resistor 235 can be understood as the first end 237-1 of the compensation circuit 237.
  • the wearing detection device provided by the present application is provided with a second resistor connected in series with the compensation capacitor, and the third end of the capacitance sensor chip is electrically connected to the compensation capacitor through the second resistor, which can reduce the charge of the compensation capacitor through the second resistor.
  • the discharge time is convenient for detecting the charging and discharging time of the compensation capacitor, so as to obtain the capacitance value of the compensation capacitor.
  • the resistance value of the second resistor 235 and the resistance value of the first resistor 233 may be the same. In this way, by making the resistance value of the first resistance of the capacitance detection channel and the second resistance of the compensation circuit the same, the difference between the capacitance detection channel and the compensation channel can be reduced, so as to further improve the detection accuracy.
  • the compensation circuit 237 may further include a second filter circuit 236 connected in series with the compensation capacitor 234.
  • the present application does not make any limitation on the positional relationship between the compensation capacitor 234 and the second filter circuit 236.
  • the second filter circuit 236 may be provided between the capacitance sensor chip 231 and the compensation capacitor 234, and for another example, the compensation capacitor 234 may be provided between the capacitance sensor chip 231 and the second filter circuit 236.
  • the compensation circuit may not only include a compensation capacitor and a second filter circuit connected in series, but also may include a compensation capacitor, a second filter circuit, and a second resistor connected in series.
  • FIG. 9 is another schematic block diagram of the wearing detection device provided by this application. Compared with the embodiment corresponding to FIG. 8, the embodiment corresponding to FIG. 9 adds a second filter circuit 236.
  • the compensation circuit 237 includes a second resistor 235, a second filter circuit 236 and a compensation capacitor 234 connected in series.
  • the third terminal 231-3 of the capacitance sensor chip 231 is electrically connected to the compensation capacitor 234 through the second resistor 235 and the second filter circuit 236.
  • the second filter circuit 236 includes a first terminal 236-1 and a second terminal 236-2, and the first terminal 235-1 of the second resistor 235 is electrically connected to the third terminal 231-3 of the capacitance sensor chip 231 ,
  • the second end 235-2 of the second resistor 235 is electrically connected to the first end 236-1 of the second filter circuit 236, and the second end 236-2 of the second filter circuit 236 is connected to the first end 234- of the compensation capacitor 234. 1 is electrically connected, the second end 234-2 of the compensation capacitor 234 is grounded, and the second end 231-2 of the capacitance sensor chip 231 is grounded.
  • the second end 234-2 of the compensation capacitor 234 can be understood as the second end 237-2 of the compensation circuit 237, and the first end 235-1 of the second resistor 235 can be understood as the first end 237-1 of the compensation circuit 237.
  • the second filter capacitor 236 may be an inductor.
  • the inductance value of the second filter circuit 236 and the inductance value of the first filter circuit 232 may be the same.
  • FIG. 10 shows a schematic block diagram of a wireless module provided by this application.
  • the wireless module 220 includes a wireless communication module 221, which is specifically used to process received or transmitted wireless communication signals.
  • the wireless communication module 221 may be used to forward received wireless communication signals.
  • the wireless communication module 220 may also It can be used to modulate or demodulate signals and channel coding or decoding.
  • the wireless communication module 221 includes a first end 221-1 and a second end 221-2.
  • the first end 221-1 of the wireless communication module 221 is electrically connected to the first end 210-1 of the antenna 210.
  • the wireless communication module The second end 221-2 of the 221 may be electrically connected to the processor of the wearing detection device 200 (not shown in the figure).
  • the first end 221-1 of the wireless communication module 221 can be understood as the first end 220-1 of the wireless module 220, which is used to electrically connect the antenna 210 and the capacitance detection module 230.
  • FIG. 11 shows another schematic block diagram of the wireless module provided by this application. Compared with the embodiment corresponding to FIG. 10, the embodiment corresponding to FIG. 11 adds a third filter circuit 222.
  • the wireless module 220 includes a wireless module 221 and a third filter circuit 222 connected in series.
  • the third filter circuit 222 is used to filter out a second interference signal.
  • the second interference signal is included between the antenna 210 and the wireless module 220.
  • the third filter circuit 222 includes a first terminal 222-1 and a second terminal 222-2, the second terminal 222-2 of the third filter circuit 222 and the first terminal of the antenna 210 210-1 is electrically connected, and the first terminal 222-1 of the third filter circuit 222 is electrically connected with the first terminal 221-1 of the wireless communication module 221.
  • the wireless communication module 221 is electrically connected to the antenna through the third filter circuit 222.
  • the second end 222-2 of the third filter circuit 222 can be understood as the first end 220-1 of the wireless module 220.
  • the signal transmitted between the antenna 210 and the wireless module 220 may be a useful signal that does not include noise signals, or may be useful signals and noise signals, which is not limited in this application, and useful signals represent signals that actually carry data.
  • the third filter circuit 222 can filter out the direct current signal, and can also filter out signals other than the direct current signal in the second interference signal, which is not limited in this application.
  • the wireless module 220 includes a wireless module 221 and a third filter circuit 222 connected in series.
  • the third filter circuit 222 includes a DC blocking circuit 223 for filtering DC signals and blocking DC signals.
  • the circuit 223 includes a first terminal 223-1 and a second terminal 223-2.
  • the second terminal 223-2 of the dc blocking circuit 223 is electrically connected to the first terminal 210-1 of the antenna 210, and the first terminal 223 of the dc blocking circuit 223 -1 is electrically connected to the first end 221-1 of the wireless communication module 221.
  • the second terminal 223-2 of the DC blocking circuit 223 can be understood as the second terminal 222-2 of the third filter circuit 222, and the first terminal 223-1 of the DC blocking circuit 223 can be understood as the first terminal of the third filter circuit 222 222-1.
  • the DC blocking circuit 223 may be a capacitor for filtering DC signals.
  • the DC blocking circuit 223 can also filter out a part of low frequency signals.
  • the wireless module 220 includes a wireless module 221 and a third filter circuit 222 connected in series.
  • the third filter circuit 222 includes a matching circuit 224 for filtering out the second interference signal.
  • the matching circuit 224 includes a first terminal 224-1 and a second terminal 224-2.
  • the second terminal 224-2 of the matching circuit 224 is electrically connected to the first terminal 210-1 of the antenna 210, and the matching circuit 224
  • the first end 224-1 of the wireless communication module 221 is electrically connected to the first end 221-1 of the wireless communication module 221.
  • the wireless communication module 221 may be electrically connected to the antenna through the matching circuit 224.
  • the second end 224-2 of the matching circuit 224 can be understood as the second end 222-2 of the third filter circuit 222, and the first end 224-1 of the matching circuit 224 can be understood as the first end 222- of the third filter circuit 222. 1.
  • the matching circuit 224 may be used to filter out low frequency signals.
  • the wireless module 220 includes a wireless module 221 and a third filter circuit 222 connected in series.
  • the third filter circuit 222 includes a DC blocking circuit 223 and a matching circuit 224 connected in series.
  • the first end 224-1 of the 224 is electrically connected to the first end 221-1 of the wireless communication module 221, and the second end 224-2 of the matching circuit 224 is electrically connected to the first end 223-1 of the DC blocking circuit 223.
  • the second end 223-2 of the circuit 223 is electrically connected to the first end 210-1 of the antenna 210.
  • the wireless communication module 221 is electrically connected to the antenna 210 through the matching circuit 223 and the third filter circuit 222.
  • the wireless communication module 221 may be electrically connected to the antenna through the matching circuit 224 and the DC blocking circuit 223.
  • the first terminal 224-1 of the matching circuit 224 can be understood as the first terminal 222-1 of the third filter circuit 222, and the second terminal 223-2 of the DC blocking circuit 223 can be understood as the second terminal 222 of the third filter circuit 222. -2.
  • the wireless module 220 in FIG. 13 may correspond to the wireless module 220 in (c) in FIG. 12, and the capacitance detection module 230 in FIG. 13 may correspond to the capacitance detection module in FIG.
  • the wireless module 220 in FIG. 14 may correspond to the wireless module 220 in (c) in FIG. 12, and the capacitance detection module 230 in FIG. 14 may correspond to the capacitance detection module 230 in FIG.
  • FIG. 15 and 16 are another schematic block diagrams of the wearing detection device provided by the present application. It should be understood that the wearing detection device shown in FIG. 15 and FIG. 16 is only for schematic illustration, and should not constitute a limitation to this application.
  • the wearing detection device shown in FIG. 15 may correspond to the wearing detection device shown in FIG. 13. 15, the wearing detection device 200 includes an antenna 210, a wireless module 220, and a capacitance detection module 230.
  • the working frequency of the wireless module 220 is a high frequency
  • the working frequency of the capacitance detection module 230 is a low frequency.
  • the wireless module 220 includes a wireless communication module 221 and a third filter circuit 222.
  • the third filter circuit 222 includes a matching circuit 224 and a DC blocking circuit 223.
  • the matching circuit 224 is formed by an inductor L 1 and a capacitor C 2 in parallel, and the DC blocking circuit 223 Is the capacitor C 1 , the second end 223-2 of the DC blocking circuit 223 is electrically connected to the first terminal 210-1 of the antenna 210, and the first terminal 223-1 of the DC blocking circuit 223 and the second terminal 224- of the matching circuit 224 are electrically connected. 2 Electrical connection, the first end 224-1 of the matching circuit 224 is electrically connected to the first end 221-1 of the wireless communication module 221.
  • the capacitance detection module 230 includes a capacitance sensor chip 231, a first resistor 233, and a first filter circuit 232.
  • the first filter circuit 232 is an inductor L 2
  • the first resistor 233 is a resistor R 1
  • the first filter circuit 232 is The second end 232-2 is electrically connected to the first end 210-1 of the antenna 210
  • the first end 232-1 of the first filter circuit 232 is electrically connected to the second end 233-2 of the first resistor 233.
  • the first end 233-1 is electrically connected to the first end 231-1 of the capacitance sensor chip 231.
  • the wearing detection device shown in FIG. 16 may correspond to the wearing detection device shown in FIG. 14.
  • the wearing detection device 200 includes an antenna 210, a wireless module 220, and a capacitance detection module 230.
  • the working frequency of the wireless module 220 is a high frequency
  • the working frequency of the capacitance detection module 230 is a low frequency.
  • the wireless module 220 is the same as FIG. 15 and will not be described again.
  • the capacitance detection module 230 includes a capacitance sensor chip 231, a first resistor 233, a first filter circuit 232, and a compensation circuit 237.
  • the first end 231-1 of the capacitance sensor chip 231 is electrically connected through the first resistor 233 and the first filter circuit 232.
  • the first resistor 233 is R 1
  • the first filter circuit 232 is an inductor L 2
  • the second end 232-2 of the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210
  • the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210.
  • One end 232-1 is electrically connected to the second end 233-2 of the first resistor 233
  • the first end 233-1 of the first resistor 233 is electrically connected to the first end 231-1 of the capacitance sensor chip 231.
  • the compensation circuit 237 includes a second resistor 235, a second filter circuit 236, and a compensation capacitor 234.
  • the second resistor 235 is a resistor R 2
  • the second filter circuit 236 is an inductor L 3
  • the compensation capacitor 234 is a capacitor C 3 .
  • the second terminal 234-2 is grounded, the first terminal 234-1 of the compensation capacitor 234 is electrically connected to the second terminal 236-2 of the second filter circuit 236, and the first terminal 236-1 of the second filter circuit 236 is electrically connected to the second resistor
  • the second end 235-2 of the 235 is electrically connected, the first end 235-1 of the second resistor 235 is electrically connected to the third end 231-3 of the capacitance sensor chip 231, and the second end 231-2 of the capacitance sensor chip 231 Grounding, so that the second end 231-2 and the third end 231-3 of the capacitance sensor chip 231 form a loop with the compensation circuit 237.

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Abstract

本申请提供了一种佩戴检测装置，该佩戴检测装置包括天线和电容检测模块，通过复用天线，将天线作为一个电容检测电极，该天线与人体之间可形成电容效应，在不额外增加电极的情况下，通过电容检测模块检测该天线与人体之间形成的电容的电容值来检测该佩戴检测装置的佩戴状态，在可以实现该佩戴检测装置的佩戴检测功能的情况下，可以有效地减少该佩戴检测装置的内部空间，一方面可以减少该佩戴检测装置的尺寸，另一方面可以减少该佩戴检测装置的制作成本。

Description

佩戴检测装置
本申请要求于2019年9月6日提交中国专利局、申请号为201910844081.6、申请名称为“佩戴检测装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备，更具体地，涉及一种佩戴检测装置。
背景技术
真实无线立体声(true wireless stereo，TWS)耳机没有传统的物理线材，同时还具有许多智能功能，得到了广泛应用。为了实现佩戴检测功能，TWS耳机中设置有电容传感器和电容传感金属电极，电容传感金属电极与人体可形成电容效应，电容传感芯片可以检测电容传感金属电极与人体之间的电容变化量，以实现佩戴检测功能。例如，当TWS耳机被佩戴至耳朵时，耳朵的皮肤靠近电容传感金属电极，会使得电容传感金属电极与人体的电容值增大，电容传感芯片检测到增大的电容值，认为TWS耳机被佩戴。
为了提高检测灵敏度和准确性，需要电容传感金属电极具有足够大的金属面积，才能和人体之间形成较大的电容，以被电容传感芯片检测到该电容。但是，TWS耳机的尺寸较小，内部空间有限，难以将电容传感金属电极的金属面积做大。
发明内容
本申请提供一种佩戴检测装置，复用天线，将天线作为一个电容检测电极，该天线与人体之间可形成电容效应，在不额外增加电极的情况下，通过检测该天线与人体之间形成的电容的电容值来检测该佩戴检测装置的佩戴状态，在可以实现该佩戴检测装置的佩戴检测功能的情况下，可以有效地减少该佩戴检测装置的内部空间，一方面可以减少该佩戴检测装置的尺寸，另一方面可以减少该佩戴检测装置的制作成本。
第一方面，提供了一种佩戴检测装置，该佩戴检测装置包括：
天线，包括第一端；
电容检测模块，用于检测所述天线与人体之间形成的电容的电容值，以及，用于根据所述电容值确定所述佩戴检测装置的佩戴状态，所述电容检测模块包括电容传感芯片，所述电容传感芯片包括第一端，所述电容传感芯片的第一端与所述天线的第一端电连接。
因此，本申请提供的佩戴检测装置，在不额外增加电极的情况下，复用天线，将该天线作为电容检测电极，将电容检测模块电连接至该天线，利用该天线与人体之间形成的电容效应，通过该电容检测模块检测该天线与人体之间形成的电容的电容值来检测佩戴检测装置的佩戴状态，在可以实现该佩戴检测装置的佩戴检测功能的情况下，可以有效地减少该佩戴检测装置的内部空间，一方面可以减少该佩戴检测装置的尺寸，另一方面可以减少该佩戴检测装置的制作成本。
可选地，所述电容检测模块还包括第一滤波电路，用于滤除第一干扰信号，所述第一干扰信号包括除在所述天线与所述电容检测模块之间传输的信号以外的部分或全部信号，所述电容传感芯片的第一端通过所述第一滤波电路与所述天线的第一端电连接。
因此，本申请提供的佩戴检测装置，通过设置第一滤波电路，使得电容传感芯片的第一端通过该第一滤波电路电连接至天线，可以有效地滤除干扰信号，提高信号质量。
可选地，所述电容检测模块还包括第一电阻，所述第一电阻与所述第一滤波电路串联连接。
因此，本申请提供的佩戴检测装置，设置与第一滤波电路串联的第一电阻，将电容传感芯片的第一端通过第一电阻和第一滤波电路电连接至天线，可以通过第一电阻降低天线的充放电时间，便于检测天线的充放电时间，以便得到天线与人体之间的电容值。
可选地，所述电容检测模块还包括补偿电路，所述补偿电路包括第一端和第二端，所述电容传感芯片包括第二端和第三端，所述补偿电路的第一端与所述电容传感芯片的第三端电连接，所述补偿电路的第二端与所述电容传感芯片的第二端电连接。
因此，本申请提供的佩戴检测装置，设置补偿电路，通过电容传感芯片对补偿电路的检测，实现对电容传感芯片的第一端与天线之间的通道的补偿功能，以减少外部环境以及佩戴检测装置内部的温度以及湿度等因素对电容检测的影响，提高佩戴检测装置的检测准确率。
可选地，所述补偿电路包括补偿电容，所述补偿电容包括第一端和第二端，所述补偿电容的第一端与所述电容传感芯片的第三端电连接，所述补偿电容的第二端与所述电容传感芯片的第二端电连接，所述补偿电容的第一端为所述补偿电路的第一端，所述补偿电容的第二端为所述补偿电路的第二端。
因此，本申请提供的佩戴检测装置，设置补偿电容，电容传感芯片通过对补偿电容的真实值和测量值进行比较，可以测得相对较为准确的天线与人体之间的电容值，实现了对电容传感芯片的第一端与天线之间的通道的补偿功能，以减少外部环境以及佩戴检测装置内部的温度以及湿度等因素对电容检测的影响，提高佩戴检测装置的检测准确率。
可选地，所述补偿电路还包括第二电阻，所述第二电阻与所述补偿电容串联连接。
因此，本申请提供的佩戴检测装置，设置与补偿电容串联连接的第二电阻，将电容传感芯片的第三端通过第二电阻电连接至补偿电容，可以通过第二电阻降低补偿电容的充放电时间，便于检测补偿电容的充放电时间，以便得到补偿电容的电容值。
可选地，所述补偿电路还包括第二滤波电路，所述第二滤波电路与所述补偿电容串联连接。
可选地，所述佩戴检测装置还包括无线模块，所述无线模块包括第一端，所述无线模块的第一端与所述天线的第一端电连接。
可选地，所述无线模块包括串联连接的无线通信模块和第三滤波电路，所述第三滤波电路用于滤除第二干扰信号，所述第二干扰信号包括除在所述天线与所述无线模块之间传输的信号以外的部分或全部信号，所述无线通信模块包括第一端，所述第三滤波电路包括第一端和第二端，所述无线通信模块的第一端与所述第三滤波电路的第一端电连接，所述第三滤波电路的第二端与所述天线的第一端电连接，所述第三滤波电路的第二端为所述无线模块的第一端。
因此，本申请提供的佩戴检测装置，通过设置第三滤波电路，使得无线通信模块的第一端通过该第三滤波电路电连接至天线，可以有效地滤除干扰信号，提高信号质量。
可选地，所述第三滤波电路包括隔直电路，用于滤除直流信号，所述隔直电路包括第一端和第二端，所述隔直电路的第二端与所述天线的第一端电连接，所述隔直电路的第一端与所述无线通信模块的第一端电连接，所述隔直电路的第一端为所述第三滤波电路的第一端，所述隔直电路的第二端为所述第三滤波电路的第二端。
可选地，所述第三滤波电路包括匹配电路，用于滤除所述第二干扰信号中除直流信号以外的信号，所述匹配电路包括第一端和第二端，所述匹配电路的第二端与所述天线的第一端电连接，所述匹配电路的第一端与所述无线通信模块的第一端电连接，所述匹配电路的第一端为所述第三滤波电路的第一端，所述匹配电路的第二端为所述第三滤波电路的第二端。
可选地，所述电容检测模块的工作频率与所述无线模块的工作频率不同。
因此，本申请提供的佩戴检测装置，采用频分复用的方式，使得电容检测模块的工作频率与所述无线模块的工作频率不同，可以有效地减少天线与电容检测模块之间传输的信号和天线与无线模块之间传输的信号之间的相互干扰。
可选地，所述无线模块的工作频率是高频，所述电容检测模块的工作频率是低频。
可选地，所述佩戴检测装置为真实无线立体声TWS耳机。
附图说明
图1是本申请提供的TWS耳机的示意性结构图。
图2至图9是本申请提供的佩戴检测装置的示意性框图。
图10至图12是本申请提供的无线模块的示意性框图。
图13至图14是本申请提供的无线模块的另一示意性框图。
图15至图16是本申请提供的佩戴检测装置的另一示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例所说的A与B之间的电连接可以理解为A与B直接电连接，也可以理解为A与B之间通过其他元件实现电连接，具体形式不做任何限定。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
在本申请实施例中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。
本申请提供的佩戴检测装置可以是同时具备无线通信功能与佩戴检测功能的装置，该佩戴检测装置不限于TWS耳机，示例性地，该佩戴检测装置还可以是电子手环、电子手表、虚拟现实(virtual reality，VR)眼镜、移动应用增强现实(augmented reality，AR)眼镜等各种装置。
本申请的佩戴检测装置，复用天线，将天线作为一个电容检测电极，该天线与人体之间可形成电容效应，在不额外增加电极的情况下，通过检测该天线与人体之间形成的电容的电容值来检测该佩戴检测装置的佩戴状态，在可以实现该佩戴检测装置的佩戴检测功能的情况下，可以有效地减少该佩戴检测装置的内部空间，一方面可以减少该佩戴检测装置的尺寸，另一方面可以减少该佩戴检测装置的制作成本。
以下，结合图1至图16，对本申请提供的佩戴检测装置进行说明。
图1是本申请提供的TWS耳机的示意性结构图。应理解，TWS耳机仅为本申请的佩戴检测装置的一种示例，不应对本申请构成限定。如图1所示，TWS耳机100包括天线110、壳体120以及和天线110电连接的其他模块(图1中未示出)，天线110为金属天线，天线110可设置在壳体120的内表面(如图1所示)或外表面。若天线110设置在壳体120的外表面，可以采用激光直接成型(laser direct structuring，LDS)、激光快速成型(laser rapid prototyping，LRP)等技术实现，可选地，天线110的外表面涂覆有绝缘保护涂层以保护天线110；若天线110设置在壳体120的内表面，可以采用LDS、LRP等技术实现，也可以采用柔性电路板(flexible printed circuit，FPC)天线用双面胶或胶水将天线110以粘接的方式固定在壳体120的内表面。
图2所示为本申请提供的佩戴检测装置的示意性框图，参考图2，佩戴检测装置200包括天线210和电容检测模块230。
天线210包括第一端210-1，可以和佩戴检测装置200中的各个模块电连接。天线210用于收发无线通信信号，还可以作为一个电容检测电极，天线210与人体之间可以形成电容。
电容检测模块230包括电容传感芯片231，电容传感芯片231包括第一端231-1和第四端231-4，电容传感芯片231的第一端231-1电连接至天线210的第一端210-1，示例性地，电容传感芯片231的第四端231-4可以和处理器电连接(图中未示出)。电容检测模块230用于检测天线210与人体之间形成的电容的电容值，以及，用于根据该电容值确定佩戴检测装置200的佩戴状态。可选地，电容检测模块230中的电容传感芯片231可以用于检测从天线210输出的电信号以检测电容值，并且，根据该电容值确定佩戴检测装置200的佩戴状态。可选地，电容检测模块230还可以包括处理器，该处理器可以和电容传感芯片231的第四端231-4电连接，电容传感芯片231可以用于检测从天线210输出的电信号以检测电容值，该处理器可以根据该电容值确定佩戴检测装置200的佩戴状态。
当佩戴检测装置200被佩戴时，皮肤靠近天线210，天线210与人体之间形成的电容的电容值增大，当佩戴检测装置200未被佩戴时，皮肤远离天线210，天线210与人体之间形成的电容的电容值减少，电容值很小或者几乎没有，因此，电容检测模块230可以根据检测到的电容量的变化情况检测佩戴检测装置200的佩戴状态。
以下，以电容传感芯片231检测电容值且根据该电容值确定佩戴检测装置200的佩戴状态为例，对本申请的确定佩戴检测装置200的佩戴状态的方式做说明。
示例性地，可以设置预设条件，若电容传感芯片231检测到的电容值满足该预设条件，则认为佩戴检测装置200被佩戴，若电容传感芯片231检测到的电容值不满足该预设条件，则认为佩戴检测装置200未被佩戴。
例如，该预设条件可以是一个预设阈值，对应地，若电容传感芯片231检测到的电容 值大于或等于该预设阈值，则认为佩戴检测装置200被佩戴，若电容传感芯片231检测到的电容值小于该预设阈值，则认为佩戴检测装置200未被佩戴。
再例如，该预设条件可以是两个预设阈值，记为第一预设阈值和第二预设阈值，第一预设阈值大于第二预设阈值：若电容传感芯片231检测到的电容值大于第一预设阈值，则认为佩戴检测装置200被佩戴；若电容传感芯片231检测到的电容值小于第二预设阈值，则认为佩戴检测装置200未被佩戴；若电容传感芯片231检测到的电容值大于或等于第二预设阈值且小于或等于第一预设阈值，则认为佩戴检测装置200的佩戴状态和前一时段的佩戴状态相同。
本申请的天线可以是佩戴检测装置与其他设备(例如，手机)通信的天线，记为第一类天线，也可以是成对使用的佩戴检测装置之间通信的天线，记为第二类天线，该第二类天线也可以称为转发天线，用于转发来自其他设备的信号或接收佩戴检测装置转发的信号，示例性地，该成对使用的佩戴检测装置可以是TWS耳机。
以TWS耳机为例，TWS耳机的任一个耳机都可以包括第一类天线和/或第二类天线，在一种可能的实现方式中，TWS耳机包括主耳机和副耳机，主耳机可以包括第一类天线和第二类天线，可以将第一类天线或第二类天线中的任一个作为电容检测电极，副耳机可以包括第二类天线，将第二类天线作为电容检测电极。其中，主耳机通过第一类天线接收来自其他设备发送的无线通信信号，主耳机将属于自己声道的声道信息保留并进行后续处理，将副耳机所属的声道信息通过第二类天线转发，副耳机收到由主耳机转发的声道信息后保留并进行后续处理，或者，主耳机将属于自己声道的声道信息保留并进行后续处理，并且，复制主耳机和副耳机的声道信息，将该声道信息通过第二类天线转发，副耳机收到由主耳机转发的该声道信息后，保留属于自己声道的声道信息并进行后续处理。在另一种可能的实现方式中，TWS耳机不采用主耳机转发副耳机的声道信息的方式传输数据，没有主耳机和副耳机之分，每个耳机包括第一类天线，可以不需要第二类天线，此种情况中，可以将第一类天线作为电容检测电极，其中，每个耳机通过第一类天线接收来自其他设备的无线通信信号，并对该无线通信信号进行处理。
示例性地，该第一类天线和该第二类天线可以是各种类型的天线。例如，第一类天线可以是蓝牙天线，第二类天线可以是近场磁感应(near field magnetic induction,NFMI)天线。再例如，第一类天线和第二类天线都可以是蓝牙天线或NFMI天线。其中，蓝牙天线是集成了蓝牙模块的传输特性的天线，可以和其他设备(例如，手机)蓝牙连接和收发无线通信信号，NFMI天线是适用于NFMI技术进行通信的天线，通过在设备间耦合一个紧密低功耗且非传播的磁场进行通信连接和收发无线通信信号。
因此，本申请提供的佩戴检测装置，在不额外增加电极的情况下，复用天线，将该天线作为电容检测电极，将电容检测模块电连接至该天线，利用该天线与人体之间形成的电容效应，通过该电容检测模块检测该天线与人体之间形成的电容的电容值来检测佩戴检测装置的佩戴状态，在可以实现该佩戴检测装置的佩戴检测功能的情况下，可以有效地减少该佩戴检测装置的内部空间，一方面可以减少该佩戴检测装置的尺寸，另一方面可以减少该佩戴检测装置的制作成本。
在本申请中，天线210用于收发信号，可以和无线模块电连接。图3所示为本申请提供的佩戴检测装置的另一示意性框图。参考图3，佩戴检测装置200包括天线210、无线 模块220和电容检测模块230，无线模块220包括第一端220-1和第二端220-2，无线模块220的第一端220-1分别与天线210的第一端210-1和所述电容传感芯片231的第一端231-1电连接，示例性地，无线模块220的第二端220-2可以和佩戴检测装置200中的处理器电连接(图中未示出)。无线模块220用于处理发送至天线210或从天线210接收到的无线通信信号。例如，无线模块220也可以用于转发接收到的无线通信信号；再例如，无线模块220也可以用于调制或解调信号，以及，信道的编码或解码等。
可以看出，无线模块220和电容检测模块230都电连接至天线210的第一端210-1，传输至天线210的第一端210-1的信号可以分为两路信号，第一路信号在无线模块220和天线210之间传输，可以记为无线通信信号，第二路信号在电容检测模块230和天线210之间传输，可以记为电容检测信号。为了减少两路信号中其中一路信号对另一路信号的干扰，示例性地，可以采用频分复用的方式同时实现佩戴检测装置200的无线通信功能和佩戴检测功能。可选地，电容检测模块230的工作频率与无线模块220的工作频率不同。可选地，无线模块220的工作频率可以是高频，电容检测模块230的工作频率可以是低频。示例性地，无线模块220的工作频段可以大于1MHz，例如，该工作频率可以是10MHz～100MHz之间的频率。示例性地，电容检测模块230的工作频率可以是1KHz～1MHz之间的频率。当然，无线模块220的工作频率也可以是低频，电容检测模块230的工作频率也可以是高频，本申请不做限定。应理解，采用频分复用的方式同时实现佩戴检测装置200的无线通信功能和佩戴检测功能仅是示意性说明，不应对本申请构成限定。
以下，以图3为基础，结合图4至图9，对本申请的电容检测模块进一步做说明，以及，结合图10至图12，对无线模块做说明。
在本申请中，为了减少其他信号(例如，噪音信号、在天线与无线模块之间传输的信号等)对在天线与电容检测模块之间传输的信号的干扰，以提高信号质量，可以在电容检测模块中设置滤波电路，以滤除干扰信号。
图4所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图3对应的实施例，图4对应的实施例增加了第一滤波电路232。
参考图4，可选地，电容检测模块230包括电容传感芯片231和第一滤波电路232，用于滤除第一干扰信号，该第一干扰信号包括除在天线210与电容检测模块230之间传输的信号以外的部分或全部信号，第一滤波电路232包括第一端232-1和第二端232-2，第一滤波电路232的第一端232-1与电容传感芯片231的第一端231-1电连接，第一滤波电路232的第二端232-2分别与天线210的第一端210-1和无线模块220的第一端220-1电连接。
可以理解，在该实施例中，电容传感芯片231的第一端231-1可以通过第一滤波电路232电连接至天线210和无线模块220之间。第一滤波电路232的第二端232-2可以理解为电容检测模块230与其他模块(例如，天线210、无线模块220)电连接的一端。
其中，在天线210与电容检测模块230之间传输的信号可以是不包括噪音信号的有用信号，也可以是有用信号和噪音信号，本申请不做限定，有用信号表示的是实际承载数据的信号。
示例性地，若无线模块220的工作频率是高频，电容检测模块230的工作频率是低频，可选地，第一滤波电路232可以是电感，用于通低频阻高频，减少包括无线通信信号在内 的高频信号对在天线与电容检测模块之间传输的低频信号的干扰，以提高信号质量。在该情况中，第一干扰信号可以是高频信号。
因此，本申请提供的佩戴检测装置，通过设置第一滤波电路，使得电容传感芯片的第一端通过该第一滤波电路电连接至天线，可以有效地滤除干扰信号，提高信号质量。
在本申请中，电容传感芯片231为天线210充放电，同时可以检测天线210的充放电时间和天线210与人体之间的电压变化量以得到电容值。其中，电容传感器231需要获得天线210的充放电时间，为了便于检测充放电时间，可以在电容检测模块230中设置电阻，通过增加电阻降低天线210的充放电时间的速度，便于检测充放电时间，以便得到电容值。
图5所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图4对应的实施例，图5对应的实施例增加了第一电阻233。
参考图5，可选地，电容检测模块230包括电容传感芯片231、第一滤波电路232和第一电阻233，第一电阻233与第一滤波电路232串联连接。电容传感芯片231的第一端231-1通过第一电阻233和第一滤波电路232电连接至无线模块220和天线210之间。
示例性地，第一电阻233的取值范围可以是100欧～1千欧(100Ω～1KΩ)。
应理解，第一电阻233和第一滤波电路232的位置关系不做任何限定，可以将第一电阻233设置在电容传感芯片231与第一滤波电路232之间，也可以将第一滤波线路232设置在电容传感芯片231与第一电阻233之间，此处不做任何限定。
可选地，继续参考图5，第一电阻233包括第一端233-1和第二端233-2，第一电阻233的第一端233-1与电容传感芯片231的第一端231-1电连接，第一电阻233的第二端233-2与第一滤波电路232的第一端232-1电连接。即，在图5所示的示意图中，第一电阻233设置在电容传感芯片231与第一滤波电路232之间。
图5所示的第一电阻233与第一滤波电路232的连接关系仅为示意性说明，不应对本申请都成限定。示例性地，第一电阻233的第一端233-1与第一滤波电路232的第二端232-2电连接，第一电阻233的第二端233-2分别与天线210的第一端210-1和无线模块220的第一端220-1电连接，即，第一滤波线路232设置在电容传感芯片231与第一电阻233之间，第一电阻233的第二端233-2可以理解为电容检测模块230与其他模块(例如，天线210、无线模块220)电连接的一端。
因此，本申请提供的佩戴检测装置，设置与第一滤波电路串联的第一电阻，将电容传感芯片的第一端通过第一电阻和第一滤波电路电连接至天线，可以通过第一电阻降低天线的充放电时间，便于检测天线的充放电时间，以便得到天线与人体之间的电容值。
应理解，在本申请中，电容检测模块230也可以不需要第一滤波电路232，包括电容传感芯片231和第一电阻233，第一电阻233的第一端233-1与电容传感芯片231的第一端231-1电连接，第一电阻233的第二端233-2分别与无线模块220的第一端220-1和天线210的第一端210-1电连接。
在本申请中，外部环境的变化以及佩戴检测装置内部例如温度等因素的变化会影响天线与人体之间的电容检测的准确率，为了提高电容检测的准确率，可以在电容检测装置中设置补偿电路，将电容传感芯片的一端电连接补偿电路，以实现电路的补偿功能。也就是说，电容传感芯片可以有两个通道，电容传感芯片的一端(例如，第一端)电连接至天线与无线模块之间，形成其中一个通道，记为电容检测通道，电容传感芯片的另一端电连接 补偿电路，通过补偿电路实现电路的补偿功能，形成一个具有补偿功能的通道，记为补偿通道。以下，结合6至图9，对补偿通道做说明。
图6所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图3至图5对应的实施例，图6对应的实施例增加了补偿电路237。
参考图6，可选地，电容检测模块230还包括补偿电路237，补偿电路237包括第一端237-1和第二端237-2，电容传感芯片231包括第二端231-2和第三端231-3，补偿电路237的第一端237-1与电容传感芯片231的第三端231-3电连接，补偿电路237的第二端237-2与电容传感芯片231的第二端231-2电连接。
应理解，在图6中，补偿电路237的第二端237-2和电容传感芯片231的第二端231-2都接地，以实现补偿电路237的第二端237-2与电容传感芯片231的第二端231-2之间的电连接，形成补偿电路与电容传感芯片的两端之间的回路。还应理解，补偿电路237的第二端237-2和电容传感芯片231的第二端231-1也可以不接地，补偿电路237的第二端237-2和电容传感芯片231的第二端231-1可以直接电连接，也可以通过其他元件电连接，最终形成补偿电路237与电容传感芯片231的两端之间的回路，本申请不做任何限定。
补偿电路237可以补偿由于外部环境以及佩戴检测装置内部例如温度或湿度等因素的变化对电容检测的影响。示例性地，补偿电路237可以包括温度传感器，温度传感器的两端分别与电容传感芯片231的第二端231-2和第三端231-3电连接，以补偿由于温度的变化对电容检测的影响。示例性地，补偿电路237也可以包括补偿电容，补偿电容的两端分别与电容传感芯片231的第二端231-2和第三端231-3电连接，以补偿由于温度以及湿度等各种因素的变化对电容检测的影响。
因此，本申请提供的佩戴检测装置，设置补偿电路，通过电容传感芯片对补偿电路的检测，实现对电容传感芯片的第一端与天线之间的通道的补偿功能，以减少外部环境以及佩戴检测装置内部的温度以及湿度等因素对电容检测的影响，提高佩戴检测装置的检测准确率。
以下，以补偿电路包括补偿电容为例，对补偿电路做进一步说明。
图7所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图6对应的实施例，图7对应的实施例中的补偿电路237可以包括补偿电容234。
参考图7，可选地，补偿电路237包括补偿电容234，补偿电容234包括第一端234-1和第二端234-2，补偿电容234的第一端234-1与电容传感芯片231的第三端231-3电连接，补偿电容234的第二端234-2与电容传感芯片231的第二端231-2电连接。其中，补偿电容234的第一端234-1可以理解为补偿电路237的第一端237-1，补偿电容234的第二端234-2可以理解为补偿电路237的第二端237-2。
应理解，在图7中，补偿电容234的第二端234-2和电容传感芯片231的第二端231-2都接地，以实现补偿电容234的第二端234-2与电容传感芯片231的第二端231-2之间的电连接，形成补偿电容234与电容传感芯片231的两端之间的回路。还应理解，补偿电容234的第二端234-2和电容传感芯片231的第二端231-1也可以不接地，补偿电容234的第二端234-2的第二端234-2和电容传感芯片231的第二端231-1可以直接电连接，也可以通过其他元件电连接，最终形成补偿电容234与电容传感芯片231的两端之间的回路，本申请不做任何限定。
补偿电容234的电容值固定且已知，示例性地，补偿电容234的电容值的取值范围可以是1皮法～200皮法(1pF～200pF)。
在该实施例中，电容传感芯片231可以检测补偿电容234的电容值，将得到的补偿电容234的电容值记为测量值，通过将补偿电容234的真实值和测量值进行比较，可以估计外部环境以及佩戴检测装置内部对电容检测的影响程度，将这种影响程度作为当前检测天线与人体之间的电容值的一个考虑因素，以实现对电容检测通道的补偿功能。
例如，补偿电容的真实值为100皮法，补偿电容的测量值为80皮法，测量值与真实值之间的差值和真实值之间的比值为0.2，测量得到的天线与人体之间的电容值为120皮法，那么，估算的天线与人体之间的实际的电容值可以是120(1+0.2)＝144皮法，将估算的144皮法的电容值与预设阈值进行比较，以检测佩戴检测装置的佩戴状态。
因此，本申请提供的佩戴检测装置，设置补偿电容，通过电容传感芯片对补偿电容的真实值和测量值进行比较，可以测得相对较为准确的天线与人体之间的电容值，实现了对电容传感芯片的第一端与天线之间的通道的补偿功能，以减少外部环境以及佩戴检测装置内部的温度以及湿度等因素对电容检测的影响，提高佩戴检测装置的检测准确率。
本申请的补偿电路除了可以设置补偿电容，也可以设置与电容检测通道相同的元件。例如，若电容检测通道中设置有电阻，补偿电路中也可以设置有电阻；再例如，若电容检测通道中设置有滤波电路，补偿电路中也可以设置有滤波电路。
图8所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图7对应的实施例，图8对应的实施例增加了第二电阻235。
参考图8，可选地，补偿电路237包括补偿电容234和第二电阻235，第二电阻235与补偿电容234串联连接。电容传感芯片231的第三端231-3通过第二电阻235电连接至补偿电容234。
本申请对补偿电容234和第二电阻235的位置关系不做任何限定。例如，第二电阻235可以设置在电容传感芯片231与补偿电容234之间；再例如，补偿电容234可以设置在电容传感芯片231与第二电阻235之间。
以第二电阻235设置在电容传感芯片231与补偿电容234之间为例，对电容传感芯片231、第二电阻235和补偿电容234之间的连接关系做说明。示例性地，继续参考图8，第二电阻235包括第一端235-1和第二端235-2，第二电阻235的第一端235-1与电容传感芯片231的第三端231-3电连接，第二电阻235的第二端235-2与补偿电容234的第一端234-1电连接，补偿电容234的第二端234-2接地，电容传感芯片231的第二端231-2接地。补偿电容234的第二端234-2可以理解为补偿电路237的第二端237-2，第二电阻235的第一端235-1可以理解为补偿电路237的第一端237-1。
因此，本申请提供的佩戴检测装置，设置与补偿电容串联连接的第二电阻，将电容传感芯片的第三端通过第二电阻电连接至补偿电容，可以通过第二电阻降低补偿电容的充放电时间，便于检测补偿电容的充放电时间，以便得到补偿电容的电容值。
在该实施例中，在电容检测模块的电容检测通道中包括第一电阻233的情况下，可选地，第二电阻235的电阻值与第一电阻233的电阻值可以相同。这样，通过使得电容检测通道的第一电阻与补偿电路的第二电阻的电阻值相同，可以减少电容检测通道与补偿通道之间的差异，以进一步提高检测准确率。
可选地，补偿电路237还可以包括第二滤波电路236，第二滤波电路236与补偿电容234串联连接。
本申请对补偿电容234和第二滤波电路236的位置关系不做任何限定。例如，第二滤波电路236可以设置在电容传感芯片231与补偿电容234之间，再例如，补偿电容234可以设置在电容传感芯片231与第二滤波电路236之间。
结合图8对应的实施例，应理解，补偿电路不仅可以包括串联连接的补偿电容和第二滤波电路，也可以包括串联连接的补偿电容、第二滤波电路和第二电阻。
图9所示为本申请提供的佩戴检测装置的另一示意性框图，相比于图8对应的实施例，图9对应的实施例增加了第二滤波电路236。
参考图9，可选地，补偿电路237包括串联连接的第二电阻235、第二滤波电路236和补偿电容234。电容传感芯片231的第三端231-3通过第二电阻235和第二滤波电路236电连接至补偿电容234。
示例性地，第二滤波电路236包括第一端236-1和第二端236-2，第二电阻235的第一端235-1与电容传感芯片231的第三端231-3电连接，第二电阻235的第二端235-2与第二滤波电路236的第一端236-1电连接，第二滤波电路236的第二端236-2与补偿电容234的第一端234-1电连接，补偿电容234的第二端234-2接地，电容传感芯片231的第二端231-2接地。补偿电容234的第二端234-2可以理解为补偿电路237的第二端237-2，第二电阻235的第一端235-1可以理解为补偿电路237的第一端237-1。
示例性地，第二滤波电容236可以是电感。
在电容检测模块的电容检测通道中包括第一滤波电路232的情况下，可选地，第二滤波电路236的电感值与第一滤波电路232的电感值可以相同。
图10所示为本申请提供的无线模块的示意性框图。参考图10，无线模块220包括无线通信模块221，具体用于处理接收或发送的无线通信信号，例如，无线通信模块221可以用于转发接收到的无线通信信号，再例如，无线通信模块220也可以用于调制或解调信号以及信道的编码或解码等。无线通信模块221包括第一端221-1和第二端221-2，无线通信模块221的第一端221-1与天线210的第一端210-1电连接，示例性地，无线通信模块221的第二端221-2可以和佩戴检测装置200的处理器电连接(图中未示出)。在该实施例中，无线通信模块221的第一端221-1可以理解为无线模块220的第一端220-1，用于和天线210和电容检测模块230电连接。
图11所示为本申请提供的无线模块的另一示意性框图，相比于图10对应的实施例，图11对应的实施例增加了第三滤波电路222。
参考图11，无线模块220包括串联连接的无线模块221和第三滤波电路222，第三滤波电路222用于滤除第二干扰信号，该第二干扰信号包括除在天线210与无线模块220之间传输的信号以外的部分或全部信号，第三滤波电路222包括第一端222-1和第二端222-2，第三滤波电路222的第二端222-2与天线210的第一端210-1电连接，第三滤波电路222的第一端222-1与无线通信模块221的第一端221-1电连接。
可以理解，在该实施例中，无线通信模块221通过第三滤波电路222电连接至天线。第三滤波电路222的第二端222-2可以理解为无线模块220的第一端220-1。
其中，在天线210与无线模块220之间传输的信号可以是不包括噪音信号的有用信号， 也可以是有用信号和噪音信号，本申请不做限定，有用信号表示的是实际承载数据的信号。
示例性地，第三滤波电路222可以滤除直流信号，也可以滤除第二干扰信号中除直流信号以外的信号，本申请不做任何限定。
参考图12中的(a)，无线模块220包括串联连接的无线模块221和第三滤波电路222，可选地，第三滤波电路222包括隔直电路223，用于滤除直流信号，隔直电路223包括第一端223-1和第二端223-2，隔直电路223的第二端223-2与天线210的第一端210-1电连接，隔直电路223的第一端223-1与无线通信模块221的第一端221-1电连接。
隔直电路223的第二端223-2可以理解为第三滤波电路222的第二端222-2，隔直电路223的第一端223-1可以理解为第三滤波电路222的第一端222-1。
示例性地，隔直电路223可以是电容，用于滤除直流信号。实际上，隔直电路223也可以滤除一部分低频信号。
参考图12中的(b)，无线模块220包括串联连接的无线模块221和第三滤波电路222，可选地，第三滤波电路222包括匹配电路224，用于滤除第二干扰信号中除直流信号以外的信号，匹配电路224包括第一端224-1和第二端224-2，匹配电路224的第二端224-2与天线210的第一端210-1电连接，匹配电路224的第一端224-1与无线通信模块221的第一端221-1电连接。
可以理解，在该实施例中，无线通信模块221可以通过匹配电路224电连接至天线。匹配电路224的第二端224-2可以理解为第三滤波电路222的第二端222-2，匹配电路224的第一端224-1可以理解为第三滤波电路222的第一端222-1。
示例性地，若无线模块220的工作频率是高频，电容检测模块230的工作频率是低频，匹配电路224可以用于滤除低频信号。
参考图12中的(c)，无线模块220包括串联连接的无线模块221和第三滤波电路222，可选地，第三滤波电路222包括串联连接的隔直电路223和匹配电路224，匹配电路224的第一端224-1和无线通信模块221的第一端221-1电连接，匹配电路224的第二端224-2与隔直电路223的第一端223-1电连接，隔直电路223的第二端223-2与天线210的第一端210-1电连接。可以理解，在该实施例中，无线通信模块221通过匹配电路223和第三滤波电路222电连接至天线210。
可以理解，在该实施例中，无线通信模块221可以通过匹配电路224和隔直电路223电连接至天线。匹配电路224的第一端224-1可以理解为第三滤波电路222的第一端222-1，隔直电路223的第二端223-2可以理解为第三滤波电路222的第二端222-2。
图13和图14所示为本申请提供的佩戴检测装置的另一示意性框图。图13的无线模块220可以对应图12中的(c)的无线模块220，图13的电容检测模块230可以对应图5的电容检测模块，具体描述可以参考上文描述，不再赘述。图14的无线模块220可以对应图12中的(c)的无线模块220，图14的电容检测模块230可以对应图9的电容检测模块230，具体描述可以参考上文描述，不再赘述。
图15和图16是本申请提供的佩戴检测装置的另一示意性框图。应理解，图15和图16所示的佩戴检测装置仅为示意性说明，不应对本申请构成限定。
图15所示的佩戴检测装置可以对应图13所示的佩戴检测装置。参考图15，佩戴检测装置200包括天线210、无线模块220和电容检测模块230，无线模块220的工作频率 是高频，电容检测模块230的工作频率是低频。无线模块220包括无线通信模块221和第三滤波电路222，第三滤波电路222包括匹配电路224和隔直电路223，其中，匹配电路224由电感L 1和电容C 2并联形成，隔直电路223是电容C 1，隔直电路223的第二端223-2与天线210的第一端210-1电连接，隔直电路223的第一端223-1与匹配电路224的第二端224-2电连接，匹配电路224的第一端224-1与无线通信模块221的第一端221-1电连接。电容检测模块230包括电容传感芯片231、第一电阻233和第一滤波电路232，其中，第一滤波电路232是电感L 2，第一电阻233是电阻R 1，第一滤波电路232的第二端232-2与天线210的第一端210-1电连接，第一滤波电路232的第一端232-1与第一电阻233的第二端233-2电连接，第一电阻233的第一端233-1与电容传感芯片231的第一端231-1电连接。
图16所示的佩戴检测装置可以对应图14所示的佩戴检测装置。参考图16，佩戴检测装置200包括天线210、无线模块220和电容检测模块230，无线模块220的工作频率是高频，电容检测模块230的工作频率是低频。无线模块220与图15相同，不再赘述。电容检测模块230包括电容传感芯片231、第一电阻233、第一滤波电路232和补偿电路237，电容传感芯片231的第一端231-1通过第一电阻233和第一滤波电路232电连接至天线210的第一端210-1，电容传感芯片231的第三端231-3与补偿电路237电连接。第一电阻233是R 1，第一滤波电路232是电感L 2，第一滤波电路232的第二端232-2与天线210的第一端210-1电连接，第一滤波电路232的第一端232-1与第一电阻233的第二端233-2电连接，第一电阻233的第一端233-1与电容传感芯片231的第一端231-1电连接。补偿电路237包括第二电阻235、第二滤波电路236和补偿电容234，第二电阻235是电阻R 2，第二滤波电路236是电感L 3，补偿电容234是电容C 3，补偿电容234的第二端234-2接地，补偿电容234的第一端234-1与第二滤波电路236的第二端236-2电连接，第二滤波电路236的第一端236-1与第二电阻235的第二端235-2电连接，第二电阻235的第一端235-1与电容传感芯片231的第三端231-3电连接，电容传感芯片231的第二端231-2接地，以使得电容传感芯片231的第二端231-2和第三端231-3与补偿电路237形成回路。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (14)

  1. 一种佩戴检测装置，其特征在于，包括：
    天线，包括第一端；
    电容检测模块，用于检测所述天线与人体之间形成的电容的电容值，以及，用于根据所述电容值确定所述佩戴检测装置的佩戴状态，所述电容检测模块包括电容传感芯片，所述电容传感芯片包括第一端，所述电容传感芯片的第一端与所述天线的第一端电连接。
  2. 根据权利要求1所述的佩戴检测装置，其特征在于，所述电容检测模块还包括第一滤波电路，用于滤除第一干扰信号，所述第一干扰信号包括除在所述天线与所述电容检测模块之间传输的信号以外的部分或全部信号，所述电容传感芯片的第一端通过所述第一滤波电路与所述天线的第一端电连接。
  3. 根据权利要求2所述的佩戴检测装置，其特征在于，所述电容检测模块还包括第一电阻，所述第一电阻与所述第一滤波电路串联连接。
  4. 根据权利要求1至3中任一项所述的佩戴检测装置，其特征在于，所述电容检测模块还包括补偿电路，所述补偿电路包括第一端和第二端，所述电容传感芯片包括第二端和第三端，所述补偿电路的第一端与所述电容传感芯片的第三端电连接，所述补偿电路的第二端与所述电容传感芯片的第二端电连接。
  5. 根据权利要求4所述的佩戴检测装置，其特征在于，所述补偿电路包括补偿电容，所述补偿电容包括第一端和第二端，所述补偿电容的第一端与所述电容传感芯片的第三端电连接，所述补偿电容的第二端与所述电容传感芯片的第二端电连接，所述补偿电容的第一端为所述补偿电路的第一端，所述补偿电容的第二端为所述补偿电路的第二端。
  6. 根据权利要求5所述的佩戴检测装置，其特征在于，所述补偿电路还包括第二电阻，所述第二电阻与所述补偿电容串联连接。
  7. 根据权利要求5或6所述的佩戴检测装置，其特征在于，所述补偿电路还包括第二滤波电路，所述第二滤波电路与所述补偿电容串联连接。
  8. 根据权利要求1至7中任一项所述的佩戴检测装置，其特征在于，所述佩戴检测装置还包括无线模块，所述无线模块包括第一端，所述无线模块的第一端与所述天线的第一端电连接。
  9. 根据权利要求8所述的佩戴检测装置，其特征在于，所述无线模块包括串联连接的无线通信模块和第三滤波电路，所述第三滤波电路用于滤除第二干扰信号，所述第二干扰信号包括除在所述天线与所述无线模块之间传输的信号以外的部分或全部信号，所述无线通信模块包括第一端，所述第三滤波电路包括第一端和第二端，所述无线通信模块的第一端与所述第三滤波电路的第一端电连接，所述第三滤波电路的第二端与所述天线的第一端电连接，所述第三滤波电路的第二端为所述无线模块的第一端。
  10. 根据权利要求9所述的佩戴检测装置，其特征在于，所述第三滤波电路包括隔直电路，用于滤除直流信号，所述隔直电路包括第一端和第二端，所述隔直电路的第二端与所述天线的第一端电连接，所述隔直电路的第一端与所述无线通信模块的第一端电连接，所述隔直电路的第一端为所述第三滤波电路的第一端，所述隔直电路的第二端为所述第三 滤波电路的第二端。
  11. 根据权利要求9或10所述的佩戴检测装置，其特征在于，所述第三滤波电路包括匹配电路，用于滤除所述第二干扰信号中除直流信号以外的信号，所述匹配电路包括第一端和第二端，所述匹配电路的第二端与所述天线的第一端电连接，所述匹配电路的第一端与所述无线通信模块的第一端电连接，所述匹配电路的第一端为所述第三滤波电路的第一端，所述匹配电路的第二端为所述第三滤波电路的第二端。
  12. 根据权利要求8至11中任一项所述的佩戴检测装置，其特征在于，所述电容检测模块的工作频率与所述无线模块的工作频率不同。
  13. 根据权利要求12所述的佩戴检测装置，其特征在于，所述无线模块的工作频率是高频，所述电容检测模块的工作频率是低频。
  14. 根据权利要求1至13中任一项所述的佩戴检测装置，其特征在于，所述佩戴检测装置为真实无线立体声TWS耳机。
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