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WO2022052065A1 - 活体接近检测装置、电子设备及其方法 - Google Patents

活体接近检测装置、电子设备及其方法 Download PDF

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Publication number
WO2022052065A1
WO2022052065A1 PCT/CN2020/114891 CN2020114891W WO2022052065A1 WO 2022052065 A1 WO2022052065 A1 WO 2022052065A1 CN 2020114891 W CN2020114891 W CN 2020114891W WO 2022052065 A1 WO2022052065 A1 WO 2022052065A1
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WIPO (PCT)
Prior art keywords
signal
humidity
capacitance
living body
circuit
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Ceased
Application number
PCT/CN2020/114891
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English (en)
French (fr)
Inventor
蒋宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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Priority to PCT/CN2020/114891 priority Critical patent/WO2022052065A1/zh
Publication of WO2022052065A1 publication Critical patent/WO2022052065A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • 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

Definitions

  • the embodiments of the present application relate to the field of electronic technologies, and in particular, to a living body proximity detection device, an electronic device, and a method thereof.
  • the capacitance sensor is used to detect the change of the inductive capacitance for identification.
  • the capacitive sensor will also detect this change, which will cause misrecognition and degrade the user experience.
  • one of the technical problems solved by the embodiments of the present invention is to provide a living body proximity detection device, an electronic device and a method thereof, which are used to overcome the defect that misrecognition easily occurs when sensing living body proximity in the prior art.
  • an embodiment of the present application provides a living body proximity detection device, which includes: a capacitive sensor, a humidity sensor, and a control circuit; the capacitive sensor senses the proximity of a living body to generate a first capacitive signal, and transmits the first capacitive signal to the control circuit
  • the humidity sensor senses the proximity of a living body to generate a first humidity signal, and transmits the first humidity signal to a control circuit
  • the control circuit includes a clock circuit, a signal receiving circuit and a signal detection circuit; the clock circuit is connected to the signal receiving circuit, and the clock circuit will The clock signal is sent to the signal receiving circuit; the signal receiving circuit is electrically connected with the capacitance sensor and the humidity sensor, and the signal receiving circuit is connected with the signal detecting circuit; the signal receiving circuit receives the first capacitance signal and the first capacitance signal according to the clock cycle of the clock signal output by the clock circuit Humidity signal, the signal detection circuit generates a living body proximity signal according to the first capacitance signal and the first humidity
  • the signal detection circuit uses the first capacitance signal and the first humidity signal to determine the increase in capacitance and the increase in humidity, and generates a living body proximity signal;
  • a capacitance signal and a first humidity signal determine a decrease in capacitance and an increase in humidity, and generate a living body proximity signal.
  • the capacitance sensor senses the distance of the living body to generate a second capacitance signal, and sends the second capacitance signal to the control circuit;
  • the humidity sensor senses the second humidity signal generated when the living body is far away, and transmits the second humidity signal to the control circuit;
  • the signal receiving circuit receives the second capacitance signal and the second humidity signal respectively according to the clock period of the clock signal, and the signal detection circuit generates the living body away signal according to the second capacitance signal and the second humidity signal received by the signal receiving circuit.
  • the signal detection circuit uses the second capacitance signal and the second humidity signal to determine the reduction in humidity and the reduction in capacitance, and generates a living body distance signal; or, the signal detection circuit The amount of decrease in humidity and the amount of increase in capacitance are determined using the second capacitance signal and the second humidity signal, and a living body distance signal is generated.
  • the humidity sensor includes: a humidity sensing device, a first driving circuit, and a first operational amplifier; two ends of the humidity sensing device are respectively connected with the first driving circuit and the first operational amplifier.
  • the inverting input terminal is connected; the non-inverting input terminal of the first operational amplifier is grounded, and the output terminal of the first operational amplifier is connected to the control circuit.
  • the humidity sensor further includes a first feedback branch; two ends of the first feedback branch are respectively connected to the inverting input terminal of the first operational amplifier and the output terminal of the first operational amplifier. connect.
  • the humidity sensing device includes a first electrode, a second electrode, and a shielding metal mesh disposed outside the first electrode and the second electrode.
  • the capacitive sensor includes: an inductive capacitor, a second drive circuit, and a second operational amplifier; two ends of the inductive capacitor are respectively inverses of the second driver circuit and the second operational amplifier The input end is connected; the non-inverting input end of the second operational amplifier is grounded, and the output end of the second operational amplifier is connected with the control circuit.
  • the sensing capacitor includes a third electrode and a fourth electrode, and the third electrode and the fourth electrode are located on the same plane to form the sensing capacitor.
  • the capacitive sensor further includes a second feedback branch; two ends of the second feedback branch are respectively connected to the inverting input terminal of the second operational amplifier and the output terminal of the second operational amplifier. connect.
  • an embodiment of the present application provides an electronic device, including the apparatus for detecting a proximity of a living body as described in the first aspect or any embodiment of the first aspect.
  • the electronic device further includes an audio playback device, the audio playback device is connected to the control circuit in the living body proximity detection device, and the inductive capacitance of the capacitive sensor in the living body proximity detection device and the humidity sensor of the humidity sensor. All sensitive devices are located next to the audio playback device in the electronic equipment.
  • the electronic device is an earphone; the earphone further includes a speaker, and the speaker is connected to a control circuit in the living body proximity detection device; the sensing capacitance of the capacitive sensor in the living body proximity detection device and the humidity sensor of the humidity sensor are used. sensitive components, all located next to the speakers in the headset.
  • the electronic device is a mobile phone; the mobile phone further includes an earpiece, and the earpiece is connected to a control circuit in the living body proximity detection device; the sensing capacitance of the capacitive sensor and the humidity sensing device of the humidity sensor are located in the next to the handset in the phone.
  • an embodiment of the present application provides a method for detecting the proximity of a living body, including: acquiring a first capacitance signal generated by sensing the proximity of a living body, where the first capacitance signal is used to indicate a capacitance value of the detected sensing capacitance; acquiring a sensing living body The first humidity signal generated by the proximity is used to indicate that a humidity value is detected; a living body proximity signal is generated according to the first capacitance signal and the first humidity signal, and the living body proximity signal is used to indicate that a living body is approaching.
  • generating the living body proximity signal according to the first capacitance signal and the first humidity signal includes:
  • first capacitance signal and the first humidity signal Use the first capacitance signal and the first humidity signal to determine the increase in capacitance and the increase in humidity, and generate a living body proximity signal; or, use the first capacitance signal and the first humidity signal to determine the decrease in capacitance and the increase in humidity , and generate a live proximity signal.
  • the method further includes:
  • generating a living body distance signal according to the second capacitance signal and the second humidity signal includes:
  • the living body proximity detection device includes: a capacitive sensor, a humidity sensor and a control circuit, the capacitive sensor and the humidity sensor are respectively connected to the control circuit; the capacitive sensor senses the proximity of the living body Generate a first capacitance signal and transmit the first capacitance signal to the control circuit; the humidity sensor senses the proximity of the living body to generate the first humidity signal, and transmits the first humidity signal to the control circuit; the control circuit includes a clock circuit and a signal receiving circuit and signal detection circuit; the clock circuit is connected with the signal receiving circuit, and the clock circuit sends the clock signal to the signal receiving circuit; the signal receiving circuit is electrically connected with the capacitance sensor and the humidity sensor, and the signal receiving circuit is connected with the signal detecting circuit; The clock period of the clock signal output by the circuit receives the first capacitance signal and the first humidity signal, and the signal detection circuit generates the living body proximity signal according to the first capacitance signal and
  • the humidity sensor can be used to sense the increase in humidity caused by the proximity of the living body. Combined with the capacitive sensor to sense the first capacitive signal generated by the proximity of the living body, and the humidity sensor to sense the proximity of the living body.
  • the first humidity signal can be more accurately determined that there is a living body approaching, thereby reducing misrecognition when detecting the approaching living body, and improving the accuracy of detecting the approaching living body.
  • FIG. 1 is a structural diagram of a living body proximity detection device provided by an embodiment of the present application.
  • FIG. 2 is a structural diagram of a humidity sensor provided by an embodiment of the present application.
  • FIG. 3 is a structural diagram of another humidity sensor provided by an embodiment of the present application.
  • FIG. 4 is a structural diagram of a capacitive sensor provided by an embodiment of the present application.
  • FIG. 5 is a structural diagram of another capacitive sensor provided by an embodiment of the present application.
  • FIG. 6 is a structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 7 is a structural diagram of an earphone provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an application scenario of an earphone provided by an embodiment of the present application.
  • FIG. 9 is a structural diagram of a mobile phone according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of an application scenario of a mobile phone according to an embodiment of the present application.
  • FIG. 11 is a flowchart of a method for proximity detection of a living body provided by an embodiment of the present application.
  • FIG. 1 is a structural diagram of a living body proximity detection device provided by an embodiment of the present application.
  • the living body proximity detection device 10 includes: a capacitive sensor 101, a humidity sensor 102, and a control circuit 103; the capacitive sensor 101 senses the proximity of a living body to generate a first capacitive signal, and transmits the first capacitive signal to the control circuit 103; humidity The sensor 102 senses the proximity of a living body to generate a first humidity signal, and transmits the first humidity signal to the control circuit 103; the control circuit 103 includes a clock circuit 1031, a signal receiving circuit 1032 and a signal detection circuit 1033; the clock circuit 1031 is connected to the signal receiving circuit 1032, and the clock circuit 1031 sends the clock signal to the signal receiving circuit 1032; the signal receiving circuit 1032 is electrically connected to the capacitance sensor 101 and the humidity sensor 102, and the signal receiving circuit 1032 is connected to the
  • the capacitive sensor 101 and the humidity sensor 102 are respectively connected to the control circuit 103 . Because the living body excretes water vapor through sweat pores and pores, the proximity of the living body can cause an increase in humidity. If only the capacitance sensor 101 is used to detect the change of the inductive capacitance 1011, it may be misidentified because the approaching object is not a living body.
  • the capacitive sensor 101 is used to sense the proximity of a living body to generate a first capacitance signal
  • the humidity sensor 102 is used to sense the proximity of a living body to generate a first humidity signal, and it can be determined that there is a conductor through the first capacitive signal.
  • Approaching through the first humidity signal, it can be determined that the approaching conductor is a living body, and it can be more accurately determined that a living body is approaching, which reduces the misidentification when detecting the approaching living body, and improves the accuracy of detecting the approaching living body.
  • the capacitance sensor 101 senses the distance from the living body to generate a second capacitance signal, and sends the second capacitance signal to the control circuit 103;
  • the humidity sensor 102 senses the distance from the living body to generate the second humidity signal , and send the second humidity signal to the control circuit 103 ;
  • the signal receiving circuit 1032 receives the second capacitance signal and the second humidity signal according to the clock cycle of the clock signal, and the signal detection circuit 1033 receives the second capacitance signal according to the signal receiving circuit 1032 and the second humidity signal to generate a living body away signal. The distance from the living body will cause the humidity to decrease.
  • the distance from the living body can be determined more accurately, reducing the number of living bodies.
  • the misrecognition when moving away improves the accuracy of detecting the distance of living body.
  • the living body proximity signal is used to indicate that there is a living body approaching the living body approaching detection device
  • the living body distance signal is used to indicate that there is a living body moving away from the living body approaching detection device.
  • the first capacitance signal and the second capacitance signal may indicate the size of the detected sensing capacitance, and the capacitance increase or decrease may be determined according to the reference capacitance value; for example, if the capacitance value is determined according to the first capacitance signal If it is greater than or equal to the reference capacitance value, it indicates that the capacitance is increased; for another example, if the capacitance value is determined to be smaller than the reference capacitance value according to the second capacitance signal, it indicates that the capacitance is decreased.
  • the proximity of the conductor causes the capacitance to increase, and when the capacitance increase is greater than or equal to the first threshold, it may be determined that the proximity of the conductor causes the increase of the capacitance, and the capacitance value indicated by the first capacitance signal is greater than or equal to the reference capacitance.
  • the capacitance increase can be calculated by subtracting the reference capacitance value from the capacitance value indicated by the first capacitance signal.
  • the capacitance increase is greater than or equal to the first threshold, it is determined that there is a conductor approaching;
  • the capacitance reduction is greater than or equal to the second threshold, it is determined that the distance of the conductor causes the capacitance to decrease, the capacitance value indicated by the second capacitance signal is smaller than the reference capacitance value, and the capacitance value indicated by the second capacitance signal is subtracted from the reference capacitance value to obtain
  • the reduction of the capacitance can be calculated, and if the reduction of the capacitance is greater than or equal to the second threshold, it is determined that the conductor is far away; or, in another implementation manner, the capacitance is reduced due to the proximity of the conductor, and a first capacitance signal is generated, The capacitance value indicated by the first capacitance signal is smaller than the reference capacitance value, and the reduction amount of the capacitance is greater than or equal to the second threshold value, it is determined that there is a conductor approaching, and the conductor is far away, causing the
  • the capacitance value indicated by the second capacitance signal If it is greater than or equal to the reference capacitance value, and the increase of the capacitance is greater than or equal to the first threshold, it is determined that there is a conductor moving away.
  • the first threshold and the second threshold may be the same or different, and both the first threshold and the second threshold may take values according to specific conditions, and the first threshold and the second threshold may be values greater than or equal to 0.
  • the first humidity signal and the second humidity signal may indicate the detected humidity value, the humidity increase or decrease may be determined according to the reference humidity value, and the first capacitance signal or the second capacitance signal is combined to determine whether a living body approaches.
  • the humidity value indicated by the first humidity signal is greater than or equal to the reference humidity value, and the humidity increase can be determined according to the first humidity signal. If the humidity increase is greater than or equal to the third threshold value, combined with the first capacitance signal, it can be determined that a living body is approaching; the second The humidity value indicated by the humidity signal is less than the reference humidity value, and the humidity reduction can be determined according to the second humidity signal.
  • the third threshold and The fourth threshold may be the same or different, both the first threshold and the second threshold may be set according to specific conditions, and the third threshold and the fourth threshold may be values greater than or equal to 0. Setting the first threshold, the second threshold, the third threshold and the fourth threshold can reduce misidentification caused by slight changes in capacitance and humidity due to environmental influences, and further improve the accuracy of determining the approach and/or distance of a living body.
  • the signal detection circuit uses the first capacitance signal and the first humidity signal to determine the increase in capacitance and the increase in humidity, and generates a living body proximity signal; or, the signal detection circuit uses the first capacitance.
  • the signal and the first humidity signal determine a decrease in capacitance and an increase in humidity, and generate a living body proximity signal.
  • the signal detection circuit uses the capacitance value indicated by the first capacitance signal to subtract the reference capacitance value to obtain the increase amount of the capacitance, and uses the humidity value indicated by the first humidity signal to subtract the reference humidity value to obtain the increase amount of the humidity.
  • a living body proximity signal is generated; or, the signal detection circuit uses the reference capacitance value to subtract the capacitance value indicated by the first capacitance signal to obtain the capacitance
  • the decrease amount of the first humidity signal is used to subtract the reference humidity value from the humidity value indicated by the first humidity signal to obtain the increase amount of the humidity, and the decrease amount of the capacitance is greater than or equal to the first threshold value, and the increase amount of the humidity is greater than or equal to the third threshold value
  • a living body proximity signal is generated.
  • the signal detection circuit uses the second capacitance signal and the second humidity signal to determine the amount of decrease in humidity and the amount of decrease in capacitance, and generates a living body distance signal; or, the signal detection circuit utilizes the first signal.
  • the second capacitance signal and the second humidity signal determine a decrease in humidity and an increase in capacitance, and generate a living body distance signal.
  • the signal detection circuit uses the reference capacitance value to subtract the capacitance value indicated by the second capacitance signal to obtain the decrease in capacitance, and uses the reference humidity value to subtract the humidity value indicated by the second humidity signal to obtain the decrease in humidity.
  • the signal detection circuit uses the capacitance value indicated by the second capacitance signal to subtract the reference The capacitance value obtains the increase of the capacitance, and the humidity value indicated by the second humidity signal is subtracted from the reference humidity value to obtain the decrease of the humidity, when the increase of the capacitance is greater than or equal to the second threshold, and the decrease of the humidity is greater than or When equal to the fourth threshold value, a living body distance signal is generated.
  • the preset time length can be set according to specific conditions.
  • the preset time length can be n clock cycles of the clock circuit 1031, and n is an integer greater than or equal to 1.
  • the preset time length can be 1 clock cycle, Either 2 or 3 clock cycles.
  • a clock cycle can be set according to specific conditions, for example, a clock cycle can be 1 second, 2 seconds, 3 seconds or 5 seconds.
  • FIG. 2 is a structural diagram of a humidity sensor provided by an embodiment of the present application.
  • the humidity sensor 102 includes: a humidity sensing device 1021 , a first driving circuit 1022 , The first operational amplifier 1023; the two ends of the humidity sensor 1021 are respectively connected to the first drive circuit 1022 and the inverting input terminal of the first operational amplifier 1023; the non-inverting input terminal of the first operational amplifier 1023 is grounded, and the first operational amplifier 1023 The output terminal is connected to the control circuit 103 .
  • the humidity sensing device 1021 senses an increase in humidity
  • the signal input by the humidity sensing device 1021 to the inverting input terminal of the first operational amplifier 1023 changes, so that the first operational amplifier 1023 outputs the first humidity signal
  • the signal input by the humidity sensing device 1021 to the inverting input terminal of the first operational amplifier 1023 changes, so that the first operational amplifier 1023 outputs a second humidity signal.
  • the humidity sensor 102 further includes a first feedback branch 1024;
  • the input terminal is connected to the output terminal of the first operational amplifier 1023 .
  • the first feedback branch 1024 includes a first capacitor 1124 and a first resistor 1224 that are connected in parallel with each other.
  • the input terminal is connected; the two ends of the first resistor 1224 are respectively connected to the output terminal and the inverting input terminal of the first operational amplifier 1023 .
  • the first feedback branch 1024 can increase the stability of the output signal of the humidity sensor 102 .
  • the humidity sensing device 1021 may be a capacitive humidity sensing device 1021 or a resistive humidity sensing device 1021.
  • the capacitive humidity sensing device 1021 is used as an example for description, as shown in FIG. 3 .
  • the humidity sensor 1021 includes a first electrode 1121, a second electrode 1221, and a shielding metal mesh 1321 disposed outside the first electrode 1121 and the second electrode 1221.
  • the humidity sensor 1021 senses an increase in humidity
  • the dielectric constant between the first electrode 1121 and the second electrode 1221 increases due to the increase in humidity, resulting in an increase in the equivalent capacitance, thereby making the signal output by the first operational amplifier 1023
  • the voltage increases, that is, the first humidity signal is output; when the humidity sensor 1021 senses that the humidity decreases, the dielectric constant of the first electrode 1121 and the second electrode 1221 decreases due to the decrease in humidity, resulting in a decrease in the equivalent capacitance, thereby
  • the signal voltage output by the first operational amplifier 1023 is reduced, that is, the second humidity signal is output.
  • the shielding metal mesh 1321 can allow air to enter between the first electrode 1121 and the second electrode 1221, so humidity changes can be sensed, and the shielding metal mesh 1321 can shield the electric field to prevent the electric field from affecting the humidity sensing and improve the humidity. Sensing accuracy.
  • FIG. 4 is a structural diagram of a capacitive sensor provided by an embodiment of the present application.
  • the capacitive sensor 101 includes: a sensing capacitor 1011 , a second driving circuit 1012 , a first Two operational amplifiers 1013; both ends of the sensing capacitor 1011 are respectively connected to the second driving circuit 1012 and the inverting input terminal of the second operational amplifier 1013; the non-inverting input terminal of the second operational amplifier 1013 is grounded, and the output of the second operational amplifier 1013 The terminal is connected to the control circuit 103 .
  • the capacitive sensor may be a mutual capacitance sensor.
  • the electric field lines of the sensing capacitor 1011 are blocked by the living body, resulting in a decrease in the equivalent capacitance, thereby causing the signal output from the output end of the second operational amplifier 1013
  • the equivalent capacitance of the sensing capacitor 1011 increases, thereby causing the signal voltage output by the output terminal of the second operational amplifier 1013 to increase, that is, the second capacitance signal is output.
  • the capacitive sensor 101 further includes a second feedback branch 1014 ; two ends of the second feedback branch 1014 are respectively connected to the inverse of the second operational amplifier 1013 The phase input terminal and the output terminal of the second operational amplifier 1013 are connected.
  • the second feedback branch 1014 includes a second capacitor 1114 and a second resistor 1214 connected in parallel with each other, and two ends of the second capacitor 1114 are respectively connected to the output terminal of the second operational amplifier 1013 and the inverse The input terminal is connected; the two ends of the second resistor 1214 are respectively connected to the output terminal and the inverting input terminal of the second operational amplifier 1013 .
  • the second feedback branch 1014 can increase the stability of the output signal of the capacitive sensor 101 .
  • the sensing capacitor 1011 includes a third electrode 1111 and a fourth electrode 1211 , and the third electrode 1111 and the fourth electrode 1211 are located on the same plane to form the sensing capacitor 1011 .
  • the external surfaces of the third electrode 1111 and the fourth electrode 1211 are on the same plane, the formed electric field has better openness, and it is easier to detect whether the conductor is approaching or moving away.
  • the living body proximity detection device provided by the embodiment of the present application, combined with the first capacitive signal generated by the capacitive sensor sensing the living body's proximity, and the first humidity signal generated by the humidity sensor sensing the living body's proximity, can more accurately determine that there is a living body.
  • the misrecognition when detecting the approach of a living body improves the accuracy of detecting the approaching of a living body.
  • an embodiment of the present application provides an electronic device.
  • the electronic device 20 includes the living body proximity detection device 10 described in any embodiment of the present application;
  • the electronic device 20 further includes an audio playback device 201 .
  • the audio playback device 201 is connected to the control circuit 103 in the living body proximity detection device 10 , the sensing capacitor 1011 of the capacitive sensor 101 in the living body proximity detection device 10 and the humidity sensing device 1021 of the humidity sensor 102 , all located next to the audio playback device 201 in the electronic device.
  • next to the audio playback device 201 may be an area within a preset distance from the audio playback device, and the preset distance may be set according to specific conditions, which may be 5 mm or 10 mm, and the side of the audio playback device 201 may also be Said to be near the audio playback device 201, or the area where the audio playback device 201 is located.
  • the inductive capacitance 1011 changes, and the humidity sensor 1021 detects the humidity change, which can more accurately identify whether a living body approaches or moves away from the audio playback device 201 .
  • the living body proximity signal output by the living body proximity detection device 10 can control the audio playback device 201 to play audio data, and the living body distance signal can control the audio playback device 201 to stop playing audio data.
  • the electronic device 20 may be an earphone 30.
  • the earphone 30 further includes a speaker 301, and the speaker 301 is electrically connected to the living body proximity detection device 10;
  • the sensing capacitor 1011 of the capacitive sensor 101 in the device 10 and the humidity sensing device 1021 of the humidity sensor 102 are both located beside the speaker 301 in the earphone 30 .
  • next to the speaker 301 can be an area within a preset distance from the audio playback device, and the preset distance can be set according to specific conditions, which can be 5 mm or 10 mm, and the speaker 301 can also be said to be next to the speaker 301. Nearby or the area where the speaker 301 is located.
  • the inductive capacitance 1011 changes, and the humidity sensor 1021 detects the change in humidity, which can more accurately identify whether a living body approaches or moves away from the speaker 301 .
  • the earphone 30 is an in-ear earphone 30
  • the inductive capacitor 1011 of the living body proximity detection device 10 and the humidity sensor 1021 of the living body proximity detection device 10 are located in the in-ear area of the earphone 30 .
  • the in-ear area of the in-ear earphone 30 is placed in the ear when the user wears the earphone 30
  • the inductive capacitor 1011 and the humidity sensor 1021 are arranged in the in-ear area, so that whether the user is wearing the earphone 30 can be more accurately identified.
  • FIG. 8 FIG. 8
  • FIG. 8 is a schematic diagram of an application scenario of an earphone 30 provided by an embodiment of the present application.
  • FIG. 8 shows an earphone 30 and a living body 31.
  • the living body 31 can be the ear of a human body.
  • a capacitive sensor 101 and a humidity sensor 102 are provided inside the earphone 30, and the The sensing capacitor 1011 and the humidity sensing device 1021 of the humidity sensor 102 are located in the ear ear area of the earphone 30 .
  • the first change of the sensing capacitor 1011 causes the capacitive sensor 101 to output a first capacitance signal, and at the same time Because the humidity increases so that the humidity sensor 102 outputs the first humidity signal, the control circuit 103 of the earphone 30 generates a living body proximity signal when receiving the first capacitance signal and the first humidity signal, and plays audio data through the earphone 30 .
  • the capacitance sensor 101 outputs a second capacitance signal due to the second change in the inductive capacitance 1011, and the humidity sensor 102 outputs a second humidity signal because the humidity decreases.
  • the control circuit 103 of the earphone 30 receives the second humidity signal.
  • the second capacitance signal and the second humidity signal are used, a living body distance signal is generated, and the earphone 30 is controlled to stop playing audio data. If it is determined whether the user wears the earphone 30 only based on the change of the inductive capacitance 1011 of the capacitive sensor 101, there will be too many scenarios that cause the inductive capacitance 1011 to change, resulting in misrecognition, for example, placing the earphone 30 on a conductive table such as metal, or If there are conductive objects around, it will be determined that the user is wearing the earphone 30 .
  • the earphone provided by the embodiment of the present application combined with the first capacitive signal generated by the capacitive sensor sensing the proximity of the living body, and the first humidity signal generated by the humidity sensor sensing the proximity of the living body, can more accurately determine that there is a living body approaching, reducing the detection of the living body approaching. It can improve the accuracy of detecting the approach of living body.
  • the electronic device 20 may be a mobile phone 40.
  • the mobile phone 40 further includes an earpiece 401, and the earpiece 401 is connected to the control circuit 103 in the living body proximity detection device 10;
  • the sensing capacitance 1011 of the capacitive sensor 101 and the humidity sensing device 1021 of the humidity sensor 102 are both located beside the earpiece 401 in the mobile phone 40 .
  • next to the earpiece 401 can be an area within a preset distance from the audio playback device, and the preset distance can be set according to specific conditions, which can be 5 mm, 10 mm or 15 mm, 20 mm, next to the earpiece 401 It can also be said to be near the handset 401 or the area where the handset 401 is located.
  • the inductive capacitance 1011 changes, and the humidity sensor 1021 detects the change in humidity, which can more accurately identify whether a living body approaches or moves away from the earpiece 401 .
  • the mobile phone 40 further includes a display screen 402 ; the earpiece 401 , the sensing capacitor 1011 and the humidity sensing device 1021 are located at the same end of the display screen 402 . Because the earpiece 401 , the inductive capacitor 1011 and the humidity sensing device 1021 are located at the same end of the display screen 402 , it can be more accurately identified whether there is a living body approaching the earpiece 401 .
  • a specific application scenario is listed for description.
  • FIG. 10 is a schematic diagram of an application scenario of a mobile phone provided by an embodiment of the present application.
  • FIG. 10 shows a mobile phone 40 and a living body 41.
  • the living body 41 may be a human ear.
  • the inductive capacitance 1011 of the capacitive sensor 101 and the humidity sensor 1021 of the humidity sensor 102 can be set near the earpiece 401 of the mobile phone 40 .
  • the inductive capacitance 1011 occurs
  • the first change causes the capacitance sensor 101 to output the first capacitance signal
  • the humidity sensor 102 outputs the first humidity signal due to the increase in humidity.
  • the control circuit 103 generates a living body proximity signal when the first capacitance signal and the first humidity signal are obtained.
  • the mobile phone 40 Audio data is played through the earpiece 401, and the screen is turned off.
  • the capacitance sensor 101 outputs a second capacitance signal due to the second change in the inductive capacitance 1011, and at the same time, the humidity sensor 102 outputs a second humidity signal because the humidity decreases.
  • the control circuit 103 obtains the When the second capacitance signal and the second humidity signal are generated, a living body distance signal is generated, and the mobile phone 40 switches from the earpiece 401 to the speaker 301 to play audio data and light up the screen.
  • the mobile phone provided by the embodiment of the present application combined with the first capacitive signal generated by the capacitive sensor sensing the proximity of the living body, and the first humidity signal generated by the humidity sensor sensing the proximity of the living body, can more accurately determine that there is a living body approaching, reducing the detection of living body approaching. It can improve the accuracy of detecting the approach of living body.
  • the embodiment of the present application provides a living body proximity detection method, which can be applied to the above living body proximity detection device. As shown in FIG. 11 , the method includes the following steps:
  • Step 501 Acquire a first capacitance signal generated by sensing the proximity of a living body.
  • the first capacitance signal is used to indicate the detected capacitance value of the sensing capacitance. If the conductor approach increases the capacitance, the capacitance value indicated by the first capacitance signal is greater than or equal to the reference capacitance value, and if the conductor approach causes the capacitance to decrease, the capacitance value indicated by the first capacitance signal is less than or equal to the reference capacitance value.
  • Step 502 Acquire a first humidity signal generated by sensing the proximity of a living body.
  • the first humidity signal is used to indicate that a humidity value is detected.
  • the proximity of the living body will cause the humidity to increase. Therefore, the humidity value indicated by the first humidity signal is greater than or equal to the reference humidity value.
  • Step 503 Generate a living body proximity signal according to the first capacitance signal and the first humidity signal.
  • the living body approach signal is used to indicate that a living body is approaching.
  • the method for detecting the proximity of a living body may further include steps 504-506:
  • Step 504 Acquire a second capacitance signal generated by sensing the distance of the living body.
  • the capacitance value indicated by the second capacitance signal is smaller than the reference capacitance value, and if the conductor distance causes the capacitance to increase, the capacitance value indicated by the second capacitance signal is greater than the reference capacitance value.
  • Step 505 Acquire a second humidity signal generated by sensing that the living body is far away.
  • the humidity value indicated by the second humidity signal is smaller than the reference humidity value.
  • Step 506 Generate a living body proximity signal according to the second capacitance signal and the second humidity signal.
  • generating the living body proximity signal according to the first capacitance signal and the first humidity signal includes: using the first capacitance signal and the first humidity signal to determine an increase in capacitance and an increase in humidity, and generating a living body proximity signal; or, using the first capacitance signal and the first humidity signal to determine a decrease in capacitance and an increase in humidity, and generate a living body proximity signal.
  • the capacitance increase can be obtained by subtracting the reference capacitance value from the capacitance value indicated by the first capacitance signal
  • the humidity increase can be obtained by subtracting the reference humidity value from the humidity value indicated by the first humidity signal.
  • the signal detection circuit uses the reference capacitance value to subtract the capacitance value indicated by the first capacitance signal to obtain the decrease in capacitance , using the humidity value indicated by the first humidity signal to subtract the reference humidity value to obtain the increase in humidity, when the decrease in capacitance is greater than or equal to the first threshold, and the increase in humidity is greater than or equal to the third threshold, generate a living body close to the signal.
  • generating the living body distance signal according to the second capacitance signal and the second humidity signal includes: using the second capacitance signal and the second humidity signal to determine the amount of decrease in humidity and the amount of decrease in capacitance. , and generate a living body distance signal; or, use the second capacitance signal and the second humidity signal to determine the decrease in humidity and the increase in capacitance, and generate a living body distance signal.
  • the capacitance reduction amount can be obtained by subtracting the capacitance value indicated by the second capacitance signal from the reference capacitance value
  • the humidity reduction amount can be obtained by subtracting the humidity value indicated by the second humidity signal from the reference humidity value.
  • the signal detection circuit uses the capacitance value indicated by the second capacitance signal to subtract the reference capacitance value to obtain the capacitance
  • the increase amount of the humidity is obtained by subtracting the humidity value indicated by the second humidity signal from the reference humidity value to obtain the decrease amount of the humidity.
  • the humidity sensor can be used to sense the increase in humidity caused by the proximity of the living body
  • the capacitive sensor can be used to sense the first
  • a capacitance signal and a first humidity signal generated by the humidity sensor sensing the approach of a living body can more accurately determine that a living body is approaching, reducing misrecognition when detecting the approaching living body, and improving the accuracy of detecting the approaching living body.

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Abstract

一种活体接近检测装置（10）、电子设备（20）及其方法，活体接近检测装置（10）包括：电容传感器（101）、湿度传感器（102）及控制电路（103）；电容传感器（101）感测活体靠近产生第一电容信号，并将第一电容信号传输至控制电路（103）；湿度传感器（102）感测活体靠近产生第一湿度信号，并将第一湿度信号传输至控制电路（103）；控制电路（103）包括时钟电路（1031）、信号接收电路（1032）及信号检测电路（1033）；时钟电路（1031）连接信号接收电路（1032），信号接收电路（1032）与电容传感器（101）及湿度传感器（102）电连接，且信号接收电路（1032）连接信号检测电路（1033）；以此减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。

Description

活体接近检测装置、电子设备及其方法 技术领域
本申请实施例涉及电子技术领域，尤其涉及活体接近检测装置、电子设备及其方法。
背景技术
随着电子设备、耳机的发展，为了更智能化地满足用户听取音频的需求，可以判断用户是否具有听取的意图，例如，识别用户佩戴耳机和摘下耳机这两种场景，又如，识别用户靠近听筒和远离听筒的两种场景。通常情况下，利用电容传感器检测感应电容的变化来进行识别，但是，在实现上述方案的过程中，以耳机为例，如果用户摘下耳机放在金属等导电桌面，或是周围有导电的物品靠近，电容传感器也会检测到这种变化，会产生误识别，降低了用户体验。
发明内容
有鉴于此，本实用新型实施例所解决的技术问题之一在于提供一种活体接近检测装置、电子设备及其方法，用以克服现有技术中感应活体接近时，容易产生误识别的缺陷。
第一方面，本申请实施例提供一种活体接近检测装置，其包括：电容传感器、湿度传感器及控制电路；电容传感器感测活体靠近产生第一电容信号，并将第一电容信号传输至控制电路；湿度传感器感测活体靠近产生第一湿度信号，并将第一湿度信号传输至控制电路；控制电路，包括时钟电路、信号接收电路及信号检测电路；时钟电路连接信号接收电路，且时钟电路将时钟信号发送至信号接收电路；信号接收电路与电容传感器及湿度传感器电连接，且信号接收电路连接信号检测电路；信号接收电路根据时钟电路输出的时钟信号的时钟周期接收第一电容信号和第一湿度信号，信号检测电路根据信号接收电路接收到的第一电容信号和第一湿度信号生成活体接近信号。
可选地，在本申请的一个实施例中，信号检测电路利用第一电容信号及第一湿度信号确定电容的增加量及湿度的增加量，并生成活体接近信号；或者，信号检测电路利用第一电容信号及第一湿度信号确定电容的减小量及湿度的增加量，并生成活体接近信号。
可选地，在本申请的一个实施例中，电容传感器感测活体远离产生第二电容信号，并将第二电容信号发送至控制电路；
湿度传感器感测活体远离产生的第二湿度信号，并将第二湿度信号传输至控制电路；
信号接收电路根据时钟信号的时钟周期分别接收第二电容信号和第二湿度信号，信号检测电路根据信号接收电路接收到的第二电容信号和第二湿度信号生成活体远离信号。
可选地，在本申请的一个实施例中，信号检测电路利用第二电容信号及第二湿度信号确定湿度的减小量及电容的减小量，并生成活体远离信号；或者，信号检测电路利用第二电容信号及第二湿度信号确定湿度的减小量及电容的增加量，并生成活体远离信号。
可选地，在本申请的一个实施例中，湿度传感器包括：湿敏器件、第一驱动电路、及第一运算放大器；湿敏器件的两端分别与第一驱动电路和第一运算放大器的反相输入端连接；第一运算放大器的正相输入端接地，第一运算放大器的输出端与控制电路连接。
可选地，在本申请的一个实施例中，湿度传感器还包括第一反馈支路；第一反馈支路的两端分别与第一运算放大器的反相输入端及第一运算放大器的输出端连接。
可选地，在本申请的一个实施例中，湿敏器件包括第一电极、第二电极、以及在第一电极和第二电极外侧设置的屏蔽金属网。
可选地，在本申请的一个实施例中，电容传感器包括：感应电容、第二驱动电路、及第二运算放大器；感应电容的两端分别与第二驱动电路和第二运算放大器的反相输入端连接；第二运算放大器的正相输入端接地，第二运算放大器的输出端与控制电路连接。
可选地，在本申请的一个实施例中，感应电容包括第三电极和第四电极，第三电极和第四电极位于同一平面以形成感应电容。
可选地，在本申请的一个实施例中，电容传感器还包括第二反馈支路；第二反馈支路的两端分别与第二运算放大器的反相输入端及第二运算放大器的输出端连接。
第二方面，本申请实施例提供一种电子设备，包括如第一方面或第一方面的任意一个实施例所描述的活体接近检测装置。
可选地，在本申请的一个实施例中，电子设备还包括音频播放器件，音频播放器件与活体接近检测装置中的控制电路连接，活体接近检测装置中电容传感器的感应电容以及湿度传感器的湿敏器件，均位于电子设备中音频播放器件旁边。
可选地，在本申请的一个实施例中，电子设备为耳机；耳机还包括扬声器，扬声器与活体接近检测装置中的控制电路连接；活体接近检测装置中电容传感器的感应电容以及湿度传感器的湿敏器件，均位于耳机中扬声器旁边。
可选地，在本申请的一个实施例中，电子设备为手机；手机还包括听筒，听筒与活体接近检测装置中的控制电路连接；电容传感器的感应电容以及湿度传感器的湿敏器件，均位于手机中听筒旁边。
第三方面，本申请实施例提供一种活体接近检测方法，包括：获取感测活体靠近产生的第一电容信号，第一电容信号用于指示检测到的感应电容的电容值；获取感测活体靠近产生的第一湿度信号，第一湿度信号用于指示检测到湿度值；根据第一电容信号和第一湿度信号生成活体接近信号，活体接近信号用于指示有活体靠近。
可选地，在本申请的一个实施例中，根据第一电容信号和第一湿度信号生成活体接近信号，包括：
利用第一电容信号及第一湿度信号确定电容的增加量及湿度的增加量，并生成活体接近信号；或者，利用第一电容信号及第一湿度信号确定电容的减小量及湿度的增加量，并生成活体接近信号。
可选地，在本申请的一个实施例中，该方法还包括：
获取感测活体远离产生的第二电容信号；并获取感测活体远离产生的第二湿度信号；根据第二电容信号和第二湿度信号生成活体远离信号，活体远离信号用于指示有活体远离。
可选地，在本申请的一个实施例中，根据第二电容信号和第二湿度信号生成活体远离信号，包括：
利用第二电容信号及第二湿度信号确定湿度的减小量及电容的减小量，并生成活体远离信号；或者，利用第二电容信号及第二湿度信号确定湿度的减小量及电容的增加量，并生成活体远离信号。
本申请实施例提供的活体接近检测装置、电子设备及其方法，活体接近检测装置包括：电容传感器、湿度传感器及控制电路，电容传感器和湿度传感 器，分别与控制电路连接；电容传感器感测活体靠近产生第一电容信号，并将第一电容信号传输至控制电路；湿度传感器感测活体靠近产生第一湿度信号，并将第一湿度信号传输至控制电路；控制电路，包括时钟电路、信号接收电路及信号检测电路；时钟电路连接信号接收电路，且时钟电路将时钟信号发送至信号接收电路；信号接收电路与电容传感器及湿度传感器电连接，且信号接收电路连接信号检测电路；信号接收电路根据时钟电路输出的时钟信号的时钟周期接收第一电容信号和第一湿度信号，信号检测电路根据信号接收电路接收到的第一电容信号和第一湿度信号生成活体接近信号。活体的皮肤汗孔、毛孔回排出水蒸气，因此，利用湿度传感器可以感测活体靠近引起的湿度增加，结合电容传感器感测活体靠近所产生的第一电容信号，以及湿度传感器感测活体靠近产生的第一湿度信号就可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本申请实施例的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1为本申请实施例提供的一种活体接近检测装置的结构图；
图2为本申请实施例提供的一种湿度传感器的结构图；
图3为本申请实施例提供的另一种湿度传感器的结构图；
图4为本申请实施例提供的一种电容传感器的结构图；
图5为本申请实施例提供的另一种电容传感器的结构图；
图6为本申请实施例提供的一种电子设备的结构图；
图7为本申请实施例提供的一种耳机的结构图；
图8为本申请实施例提供的一种耳机的应用场景示意图；
图9为本申请实施例提供的一种手机的结构图；
图10为本申请实施例提供的一种手机的应用场景示意图；
图11为本申请实施例提供的一种活体接近检测方法的流程图。
具体实施方式
下面结合本实用新型实施例附图进一步说明本实用新型实施例具体实现。
本申请实施例提供一种活体接近检测装置10，如图1所示，图1为本申请实施例提供的一种活体接近检测装置的结构图。该活体接近检测装置10包括：电容传感器101、湿度传感器102及控制电路103；所述电容传感器101感测活体靠近产生第一电容信号，并将第一电容信号传输至所述控制电路103；湿度传感器102感测活体靠近产生第一湿度信号，并将第一湿度信号传输至控制电路103；控制电路103，包括时钟电路1031、信号接收电路1032及信号检测电路1033；时钟电路1031连接信号接收电路1032，且时钟电路1031将时钟信号发送至信号接收电路1032；信号接收电路1032与电容传感器101及湿度传感器102电连接，且信号接收电路1032连接信号检测电路1033；信号接收电路1032根据时钟电路1031输出的时钟信号的时钟周期接收第一电容信号和第一湿度信号，信号检测电路1033根据信号接收电路1032接收到的第一电容信号和第一湿度信号生成活体接近信号。
可选地，电容传感器101和湿度传感器102，分别与控制电路103连接。因为活体通过汗孔、毛孔会排出水蒸气，因此，活体接近可以引起湿度增加。如果只利用电容传感器101检测感应电容1011变化，可能因为接近的物体不是活体产生误识别，如果只利用湿度传感器102检测湿度变化，可能因为空气湿度变化产生误识别。本申请实施例的活体接近检测装置10，利用电容传感器101感测活体靠近产生第一电容信号，同时，结合湿度传感器102感测活体靠近产生第一湿度信号，通过第一电容信号可以确定有导体接近，通过第一湿度信号可以确定接近的导体为活体，可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
可选地，在本申请的一个实施例中，电容传感器101感测活体远离产生第二电容信号，并将第二电容信号发送至控制电路103；湿度传感器102感测活体远离产生第二湿度信号，并将第二湿度信号发送至控制电路103；信号接收电路1032根据时钟信号的时钟周期接收第二电容信号和第二湿度信号，信号检测电路1033根据信号接收电路1032接收到的第二电容信号和第二湿度信号生成活体远离信号。活体远离会引起湿度减小，结合电容传感器101感测活体远离产生的第二电容信号，以及湿度传感器102感测湿度减小产生的第二湿度信号，可以更加准确地确定活体远离，减少了活体远离时的误识别，提高了检测活体远离的准确度。
可选地，活体接近信号用于指示有活体靠近活体接近检测装置，活体远 离信号用于指示有活体远离活体接近检测装置。
需要说明的是，本申请中第一电容信号和第二电容信号可以指示检测的感应电容大小，可以根据参考电容值确定电容增大或是减小；例如，如果根据第一电容信号确定电容值大于或等于参考电容值，则表明电容增大；又如，如果根据第二电容信号确定电容值小于参考电容值，则表明电容减小。进一步地，在一种实现方式中，导体接近引起电容增加，可以在电容增加量大于或等于第一阈值时，确定有导体接近引起电容增加，第一电容信号指示的电容值大于或等于参考电容值，利用第一电容信号指示的电容值减去参考电容值就可以计算得到电容的增加量，如果电容的增加量大于或等于第一阈值，判定有导体接近；导体远离引起电容减小，可以在电容减小量大于或等于第二阈值时，确定有导体远离引起电容减小，第二电容信号指示的电容值小于参考电容值，利用参考电容值减去第二电容信号指示的电容值就可以计算得到电容的减小量，如果电容的减小量大于或等于第二阈值，判定有导体远离；或者，在另一种实现方式中，导体接近引起电容减小，产生第一电容信号，第一电容信号指示的电容值小于参考电容值，电容的减小量大于或等于第二阈值，判定有导体接近，导体远离引起电容增加，产生第二电容信号，第二电容信号指示的电容值大于或等于参考电容值，电容的增加量大于或等于第一阈值，判定有导体远离。第一阈值和第二阈值可以相同或者不同，第一阈值和第二阈值均可以根据具体情况取值，第一阈值和第二阈值可以是大于或等于0的数值。
第一湿度信号和第二湿度信号可以指示检测到的湿度值，可以根据参考湿度值确定湿度增加或者减小，结合第一电容信号或第二电容信号，确定是否有活体接近。第一湿度信号指示的湿度值大于或等于参考湿度值，根据第一湿度信号可以确定湿度增加，如果湿度增加量大于或等于第三阈值，结合第一电容信号，可以确定有活体接近；第二湿度信号指示的湿度值小于参考湿度值，根据第二湿度信号可以确定湿度减小，如果湿度减小量大于或等于第四阈值，结合第二电容信号，可以确定有活体远离，第三阈值和第四阈值可以相同或者不同，第一阈值和第二阈值均可以根据具体情况取值，第三阈值和第四阈值可以是大于或等于0的数值。设置第一阈值、第二阈值以及第三阈值和第四阈值，可以减少因为环境影响导致的一些电容和湿度的微变化带来的误识别，进一步提高判定活体接近和/或远离的准确性。
基于上述说明，此处，列举两个具体示例分别说明活体远离和活体接近 时如何生成活体远离信号和活体接近信号：
可选地，在第一个示例中，信号检测电路利用第一电容信号及第一湿度信号确定电容的增加量及湿度的增加量，并生成活体接近信号；或者，信号检测电路利用第一电容信号及第一湿度信号确定电容的减小量及湿度的增加量，并生成活体接近信号。进一步可选地，信号检测电路利用第一电容信号指示的电容值减去参考电容值得到电容的增加量，利用第一湿度信号所指示的湿度值减去参考湿度值得到湿度的增加量，在电容的增加量大于或等于第一阈值，且湿度的增加量大于或等于第三阈值时，生成活体接近信号；或者，信号检测电路利用参考电容值减去第一电容信号指示的电容值得到电容的减小量，利用第一湿度信号所指示的湿度值减去参考湿度值得到湿度的增加量，在电容的减小量大于或等于第一阈值，且湿度的增加量大于或等于第三阈值时，生成活体接近信号。
可选地，在第二个示例中，信号检测电路利用第二电容信号及第二湿度信号确定湿度的减小量及电容的减小量，并生成活体远离信号；或者，信号检测电路利用第二电容信号及第二湿度信号确定湿度的减小量及电容的增加量，并生成活体远离信号。进一步可选地，信号检测电路利用参考电容值减去第二电容信号指示的电容值得到电容的减小量，利用参考湿度值减去第二湿度信号所指示的湿度值得到湿度的减小量，在电容的减小量大于或等于第二阈值，且湿度的减小量大于或等于第四阈值时，生成活体远离信号；或者，信号检测电路利用第二电容信号指示的电容值减去参考电容值得到电容的增加量，利用参考湿度值减去第二湿度信号所指示的湿度值得到湿度的减小量，在电容的增加量大于或等于第二阈值，且湿度的减小量大于或等于第四阈值时，生成活体远离信号。
可选地，如果控制电路103接收第一电容信号和第一湿度信号的时间差小于或等于预设时间长度，则可以确定有活体接近，如果控制电路103接收第一电容信号和第一湿度信号的时间差大于预设时间长度，则判定无活体接近。预设时间长度可以根据具体情况设定，例如，预设时间长度可以是时钟电路1031的n个时钟周期，n为大于或等于1的整数，例如，预设时间长度可以是1个时钟周期、或者2个或3个时钟周期。一个时钟周期可以根据具体情况设定，例如，一个时钟周期可以是1秒、2秒、3秒或者5秒。
基于图1所示的活体接近检测装置10，此处列举两个具体示例分别说明 图1所示的活体接近检测装置10中，湿度传感器102和电容传感器101的具体结构。
可选地，在第一个示例中，图2为本申请实施例提供的一种湿度传感器的结构图，如图2所示，湿度传感器102包括：湿敏器件1021、第一驱动电路1022、第一运算放大器1023；湿敏器件1021的两端分别与第一驱动电路1022和第一运算放大器1023的反相输入端连接；第一运算放大器1023的正相输入端接地，第一运算放大器1023的输出端与控制电路103连接。在湿敏器件1021感测到湿度增加时，湿敏器件1021向第一运算放大器1023的反相输入端输入的信号发生变化，使得第一运算放大器1023输出第一湿度信号；在湿敏器件1021感测到湿度减小时，湿敏器件1021向第一运算放大器1023的反相输入端输入的信号发生变化，使得第一运算放大器1023输出第二湿度信号。
可选地，在本申请的一个实施例中，如图2所示，湿度传感器102还包括第一反馈支路1024；第一反馈支路1024的两端分别与第一运算放大器1023的反相输入端及第一运算放大器1023的输出端连接。可选地，如图2所示，第一反馈支路1024包括相互并联的第一电容1124和第一电阻1224，第一电容1124的两端分别与第一运算放大器1023的输出端及反相输入端连接；第一电阻1224的两端分别与第一运算放大器1023的输出端及反相输入端连接。第一反馈支路1024可以增加湿度传感102器输出信号的稳定性。
可选地，在本申请的一个实施例中，湿敏器件1021可以是电容式湿敏器件1021或电阻式湿敏器件1021，此处以电容式湿敏器件1021为例进行说明，如图3所示，湿敏器件1021包括第一电极1121、第二电极1221，以及在第一电极1121和第二电极1221外侧设置的屏蔽金属网1321。在湿敏器件1021感测到湿度增加时，第一电极1121和第二电极1221之间因为湿度增加使得介电常数升高，导致等效电容变大，从而使得第一运算放大器1023输出的信号电压升高，即输出第一湿度信号；在湿敏器件1021感测到湿度减小时，第一电极1121和第二电极1221因为湿度减小使得介电常数降低，导致等效电容变小，从而使得第一运算放大器1023输出的信号电压降低，即输出第二湿度信号。需要说明的是，屏蔽金属网1321可以使空气进入第一电极1121和第二电极1221之间，因此可以感测湿度变化，而且屏蔽金属网1321可以屏蔽电场，避免电场影响湿度感测，提高湿度感测的准确度。
可选地，在第二个示例中，图4为本申请实施例提供的一种电容传感器 的结构图，如图4所示，电容传感器101包括：感应电容1011、第二驱动电路1012、第二运算放大器1013；感应电容1011的两端分别与第二驱动电路1012和第二运算放大器1013的反相输入端连接；第二运算放大器1013的正相输入端接地，第二运算放大器1013的输出端与控制电路103连接。需要说明的是，电容式传感器可以是互容式传感器，在活体接近时，感应电容1011的电场线被活体阻挡，导致等效电容减小，从而造成第二运算放大器1013的输出端输出的信号电压减小，即输出第一电容信号；在活体远离时，感应电容1011的等效电容增加，从而造成第二运算放大器1013的输出端输出的信号电压增加，即输出第二电容信号。
可选地，在在本申请的一个实施例中，如图4所示，电容传感器101还包括第二反馈支路1014；第二反馈支路1014的两端分别与第二运算放大器1013的反相输入端及第二运算放大器1013的输出端连接。可选地，如图4所示，第二反馈支路1014包括相互并联的第二电容1114和第二电阻1214，第二电容1114的两端分别与第二运算放大器1013的输出端及反相输入端连接；第二电阻1214的两端分别与第二运算放大器1013的输出端及反相输入端连接。第二反馈支路1014可以增加电容传感器101输出信号的稳定性。
可选地，在在本申请的一个实施例中，感应电容1011包括第三电极1111和第四电极1211，第三电极1111和第四电极1211位于同一平面以形成感应电容1011。如图5所示，第三电极1111和第四电极1211对外的表面在同一平面，形成的电场开放性更好，更容易检测导体接近或远离。
本申请实施例提供的活体接近检测装置，结合电容传感器感测活体靠近所产生的第一电容信号，以及湿度传感器感测活体靠近产生的第一湿度信号可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
基于上述实施例所描述的活体接近检测装置10，本申请实施例提供一种电子设备，如图6所示，该电子设备20包括如本申请任一实施例所描述的活体接近检测装置10；该电子设备20还包括音频播放器件201，音频播放器件201与活体接近检测装置10中的控制电路103连接，活体接近检测装置10中电容传感器101的感应电容1011以及湿度传感器102的湿敏器件1021，均位于电子设备中音频播放器件201旁边。
需要说明的是，音频播放器件201旁边可以是距离音频播放器件在预设 距离之内的区域，预设距离可以根据具体情况设定，可以是5毫米或10毫米，音频播放器件201旁边也可以说是音频播放器件201附近，或者音频播放器件201所在的区域。在有活体接近或者远离音频播放器件201时，就会引起感应电容1011发生变化，并且使得湿敏器件1021检测到湿度变化，可以更加准确地识别是否有活体接近或者远离音频播放器件201。活体接近检测装置10输出的活体接近信号可以控制音频播放器件201播放音频数据，活体远离信号可以控制音频播放器件201停止播放音频数据。
可选地，在本申请的一个实施例中，该电子设备20可以是耳机30，如图7所示，该耳机30还包括扬声器301，扬声器301与活体接近检测装置10电连接；活体接近检测装置10中电容传感器101的感应电容1011以及湿度传感器102的湿敏器件1021，均位于耳机30中扬声器301旁边。
需要说明的是，扬声器301旁边可以是距离音频播放器件在预设距离之内的区域，预设距离可以根据具体情况设定，可以是5毫米或10毫米，扬声器301旁边也可以说是扬声器301附近或扬声器301所在的区域。在有活体接近或者远离扬声器301时，就会引起感应电容1011发生变化，并且使得湿敏器件1021检测到湿度变化，可以更加准确地识别是否有活体接近或者远离扬声器301。
可选地，在本申请的一个实施例中，耳机30为入耳式耳机30，活体接近检测装置10的感应电容1011以及活体接近检测装置10的湿敏器件1021位于耳机30的入耳区域。入耳式耳机30的入耳区域在用户佩戴耳机30时，会放置在耳朵里面，将感应电容1011以及湿敏器件1021设置在入耳区域，可以更加准确地识别用户是否佩戴耳机30。此处，列举一个具体的应用场景进行详细说明，可选地，如图8所示，图8为本申请实施例提供的一种耳机30的应用场景示意图。图8示出了耳机30和活体31，此应用场景中活体31可以是人体的耳朵，图8所示的耳机30中，耳机30内部设置有电容传感器101和湿度传感器102，且电容传感器101的感应电容1011以及湿度传感器102的湿敏器件1021位于耳机30的入耳区域，在用户佩戴耳机30时，因为人体接近耳机30，感应电容1011发生第一变化使得电容传感器101输出第一电容信号，同时因为湿度增加使得湿度传感器102输出第一湿度信号，耳机30的控制电路103在接收到第一电容信号和第一湿度信号时，生成活体接近信号，通过耳机30播放音频数据。在用户摘掉耳机30时，因为感应电容1011发生第二变化使得电容传感器 101输出第二电容信号，同时因为湿度减小使得湿度传感器102输出第二湿度信号，耳机30的控制电路103在接收到第二电容信号和第二湿度信号时，生成活体远离信号，控制耳机30停止播放音频数据。如果只根据电容传感器101的感应电容1011变化来确定用户是否佩戴耳机30，则会因为引起感应电容1011变化的场景太多，导致发生误识别，例如，将耳机30放在金属等导电桌面，或是周围有导电的物品靠近，会判定用户佩戴耳机30。此应用场景中，因为人体的皮肤汗孔、毛孔会排出水蒸气，因此，在检测感应电容1011变化的同时，结合湿度变化可以更准确得确定是否有活体接近，在此应用场景中，即可判断是否有人体接近，从而更加准确地控制耳机30播放音频数据。
本申请实施例提供的耳机，结合电容传感器感测活体靠近所产生的第一电容信号，以及湿度传感器感测活体靠近产生的第一湿度信号可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
可选地，在本申请的一个实施例中，该电子设备20可以是手机40，如图9所示，手机40还包括听筒401，听筒401与活体接近检测装置10中的控制电路103连接；电容传感器101的感应电容1011以及湿度传感器102的湿敏器件1021，均位于手机40中听筒401旁边。
需要说明的是，听筒401旁边可以是距离音频播放器件在预设距离之内的区域，预设距离可以根据具体情况设定，可以是5毫米、10毫米或者15毫米、20毫米，听筒401旁边也可以说是听筒401附近或者听筒401所在的区域。在有活体接近或者远离听筒401时，就会引起感应电容1011发生变化，并且使得湿敏器件1021检测到湿度变化，可以更加准确地识别是否有活体接近或者远离听筒401。
可选地，如图9所示，手机40还包括显示屏402；听筒401、感应电容1011以及湿敏器件1021位于显示屏402的同一端。因为听筒401、感应电容1011以及湿敏器件1021位于显示屏402的同一端，可以更准确地识别是否有活体接近听筒401。此处，列举一个具体的应用场景进行说明，如图10所示，图10为本申请实施例提供的一种手机的应用场景示意图。图10示出了手机40和活体41，在此应用场景中，活体41可以是人体的耳朵。手机40的听筒401附近可以设置电容传感器101的感应电容1011以及湿度传感器102的湿敏器件1021，在用户将耳朵靠近手机40的听筒401时，因为人体接近手机40的听筒 401，感应电容1011发生第一变化使得电容传感器101输出第一电容信号，同时因为湿度增加使得湿度传感器102输出第一湿度信号，控制电路103在得到第一电容信号和第一湿度信号时，生成活体接近信号，手机40通过听筒401播放音频数据，并且熄灭屏幕。在用户将耳朵远离手机40的听筒401时，因为感应电容1011发生第二变化使得电容传感器101输出第二电容信号，同时因为湿度减小使得湿度传感器102输出第二湿度信号，控制电路103在得到第二电容信号和第二湿度信号时，生成活体远离信号，手机40从听筒401切换为扬声器301播放音频数据，并点亮屏幕。
本申请实施例提供的手机，结合电容传感器感测活体靠近所产生的第一电容信号，以及湿度传感器感测活体靠近产生的第一湿度信号可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
结合上述实施例中所描述的活体接近检测装置，本申请实施例提供一种活体接近检测方法，可以应用于上述活体接近检测装置，如图11所示，该方法包括以下步骤：
步骤501、获取感测活体靠近产生的第一电容信号。
第一电容信号用于指示检测到的感应电容的电容值。如果导体接近引起电容增加，则第一电容信号所指示的电容值大于或等于参考电容值，如果导体接近引起电容减小，则第一电容信号所指示的电容值小于或等于参考电容值。
步骤502、获取感测活体靠近产生的第一湿度信号。
第一湿度信号用于指示检测到湿度值。活体靠近会引起湿度增加，因此，第一湿度信号所指示的湿度值大于或等于参考湿度值。
步骤503、根据第一电容信号和第一湿度信号生成活体接近信号。
活体接近信号用于指示有活体靠近。
需要说明的是，该活体接近检测方法还可以包括步骤504-506：
步骤504、获取感测活体远离产生的第二电容信号。
如果导体远离引起电容减小，则第二电容信号所指示的电容值小于参考电容值，如果导体远离引起电容增加，则第二电容信号所指示的电容值大于参考电容值。
步骤505、获取感测活体远离产生的第二湿度信号。
活体远离会引起湿度减小，因此，第二湿度信号所指示的湿度值小于参 考湿度值。
步骤506、根据第二电容信号和第二湿度信号生成活体接近信号。
可选地，结合步骤501-506所描述的方法，此处，列举两个具体示例说明如何生成活体接近信号和活体远离信号：
可选地，在第一个示例中，根据第一电容信号和第一湿度信号生成活体接近信号，包括：利用第一电容信号及第一湿度信号确定电容的增加量及湿度的增加量，并生成活体接近信号；或者，利用第一电容信号及第一湿度信号确定电容的减小量及湿度的增加量，并生成活体接近信号。进一步地，可以利用第一电容信号指示的电容值减去参考电容值得到电容的增加量，利用第一湿度信号所指示的湿度值减去参考湿度值得到湿度的增加量，在电容的增加量大于或等于第一阈值，且湿度的增加量大于或等于第三阈值时，生成活体接近信号；或者，信号检测电路利用参考电容值减去第一电容信号指示的电容值得到电容的减小量，利用第一湿度信号所指示的湿度值减去参考湿度值得到湿度的增加量，在电容的减小量大于或等于第一阈值，且湿度的增加量大于或等于第三阈值时，生成活体接近信号。
可选地，在第二个示例中，根据第二电容信号和第二湿度信号生成活体远离信号，包括：利用第二电容信号及第二湿度信号确定湿度的减小量及电容的减小量，并生成活体远离信号；或者，利用第二电容信号及第二湿度信号确定湿度的减小量及电容的增加量，并生成活体远离信号。进一步地，可以利用参考电容值减去第二电容信号指示的电容值得到电容的减小量，利用参考湿度值减去第二湿度信号所指示的湿度值得到湿度的减小量，在电容的减小量大于或等于第二阈值，且湿度的减小量大于或等于第四阈值时，生成活体远离信号；或者，信号检测电路利用第二电容信号指示的电容值减去参考电容值得到电容的增加量，利用参考湿度值减去第二湿度信号所指示的湿度值得到湿度的减小量，在电容的增加量大于或等于第二阈值，且湿度的减小量大于或等于第四阈值时，生成活体远离信号。
本申请实施例提供的活体接近检测方法，因为活体的皮肤汗孔、毛孔回排出水蒸气，因此，利用湿度传感器可以感测活体靠近引起的湿度增加，结合电容传感器感测活体靠近所产生的第一电容信号，以及湿度传感器感测活体靠近产生的第一湿度信号就可以更准确地确定有活体接近，减少了检测活体靠近时的误识别，提高了检测活体靠近的准确度。
至此，已经对本主题的特定实施例进行了描述。其它实施例在所附权利要求书的范围内。在一些情况下，在权利要求书中记载的动作可以按照不同的顺序来执行并且仍然可以实现期望的结果。另外，在附图中描绘的过程不一定要求示出的特定顺序或者连续顺序，以实现期望的结果。在某些实施方式中，多任务处理和并行处理可以是有利的。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于系统实施例而言，由于其基本相似于方法实施例，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (18)

  1. 一种活体接近检测装置，其特征在于，包括：电容传感器、湿度传感器及控制电路；
    所述电容传感器感测活体靠近产生的第一电容信号，并将所述第一电容信号传输至所述控制电路；
    所述湿度传感器感测所述活体靠近产生的第一湿度信号，并将所述第一湿度信号传输至所述控制电路；
    所述控制电路，包括时钟电路、信号接收电路及信号检测电路；所述时钟电路连接所述信号接收电路，且所述时钟电路将时钟信号发送至所述信号接收电路；所述信号接收电路与所述电容传感器及所述湿度传感器电连接，且所述信号接收电路连接所述信号检测电路；所述信号接收电路根据所述时钟电路输出的时钟信号的时钟周期接收所述第一电容信号和所述第一湿度信号，所述信号检测电路根据所述信号接收电路接收到的所述第一电容信号和所述第一湿度信号生成活体接近信号。
  2. 根据权利要求1所述的活体接近检测装置，其特征在于，
    所述信号检测电路利用所述第一电容信号及所述第一湿度信号确定电容的增加量及湿度的增加量，并根据电容的增加量及湿度的增加量生成所述活体接近信号；
    或者，所述信号检测电路利用所述第一电容信号及所述第一湿度信号确定电容的减小量及湿度的增加量，并根据电容的减小量及湿度的增加量生成所述活体接近信号。
  3. 根据权利要求1所述的活体接近检测装置，其特征在于，
    所述电容传感器感测活体远离产生第二电容信号，并将所述第二电容信号发送至所述控制电路；
    所述湿度传感器感测所述活体远离产生的第二湿度信号，并将所述第二湿度信号传输至所述控制电路；
    所述信号接收电路根据所述时钟信号的时钟周期分别接收所述第二电容信号和所述第二湿度信号，所述信号检测电路根据所述信号接收电路接收到的所述第二电容信号和所述第二湿度信号生成活体远离信号。
  4. 根据权利要求3所述的活体接近检测装置，其特征在于，
    所述信号检测电路利用所述第二电容信号及所述第二湿度信号确定湿度的减小量及电容的减小量，并根据电容的减小量及湿度的减小量生成所述活体远 离信号；
    或者，所述信号检测电路利用所述第二电容信号及所述第二湿度信号确定湿度的减小量及电容的增加量，并根据电容的增加量及湿度的减小量生成所述活体远离信号。
  5. 根据权利要求1所述的活体接近检测装置，其特征在于，所述湿度传感器包括：湿敏器件、第一驱动电路、及第一运算放大器；
    所述湿敏器件的两端分别与所述第一驱动电路和所述第一运算放大器的反相输入端连接；
    所述第一运算放大器的正相输入端接地，所述第一运算放大器的输出端与所述控制电路连接。
  6. 根据权利要求5所述的活体接近检测装置，其特征在于，所述湿度传感器还包括第一反馈支路；所述第一反馈支路的两端分别与所述第一运算放大器的反相输入端及所述第一运算放大器的输出端连接。
  7. 根据权利要求5所述的活体接近检测装置，其特征在于，所述湿敏器件包括第一电极、第二电极、以及在所述第一电极和所述第二电极外侧设置的屏蔽金属网。
  8. 根据权利要求1所述的活体接近检测装置，其特征在于，所述电容传感器包括：感应电容、第二驱动电路、及第二运算放大器；
    所述感应电容的两端分别与所述第二驱动电路和所述第二运算放大器的反相输入端连接；
    所述第二运算放大器的正相输入端接地，所述第二运算放大器的输出端与所述控制电路连接。
  9. 根据权利要求8所述的活体接近检测装置，其特征在于，
    所述感应电容包括第三电极和第四电极，所述第三电极和所述第四电极位于同一平面以形成所述感应电容。
  10. 根据权利要求8所述的活体接近检测装置，其特征在于，所述电容传感器还包括第二反馈支路；所述第二反馈支路的两端分别与所述第二运算放大器的反相输入端及所述第二运算放大器的输出端连接。
  11. 一种电子设备，其特征在于，包括如权利要求1-10任一项所述的活体接近检测装置。
  12. 根据权利要求11所述的电子设备，其特征在于，所述电子设备还包括 音频播放器件，所述音频播放器件与所述活体接近检测装置中的控制电路连接，所述活体接近检测装置中电容传感器的感应电容以及湿度传感器的湿敏器件，均位于所述电子设备中所述音频播放器件旁边。
  13. 根据权利要求11所述的电子设备，其特征在于，所述电子设备为耳机；所述耳机还包括扬声器，所述扬声器与所述活体接近检测装置中的控制电路连接；所述活体接近检测装置中电容传感器的感应电容以及湿度传感器的湿敏器件，均位于所述耳机中所述扬声器旁边。
  14. 根据权利要求11所述的电子设备，其特征在于，所述电子设备为手机；
    所述手机还包括听筒，所述听筒与所述活体接近检测装置中的控制电路连接，电容传感器的感应电容以及湿度传感器的湿敏器件，均位于所述手机中所述听筒旁边。
  15. 一种活体接近检测方法，其特征在于，包括：
    获取感测活体靠近产生的第一电容信号，所述第一电容信号用于指示检测到的感应电容的电容值；
    获取感测活体靠近产生的第一湿度信号，所述第一湿度信号用于指示检测到湿度值；
    根据所述第一电容信号和所述第一湿度信号生成活体接近信号，所述活体接近信号用于指示有活体靠近。
  16. 根据权利要求15所述的方法，其特征在于，所述根据所述第一电容信号和所述第一湿度信号生成活体接近信号，包括：
    利用所述第一电容信号及所述第一湿度信号确定电容的增加量及湿度的增加量，并生成所述活体接近信号；
    或者，利用所述第一电容信号及所述第一湿度信号确定电容的减小量及湿度的增加量，并生成所述活体接近信号。
  17. 根据权利要求15所述的方法，其特征在于，所述方法还包括：
    获取感测活体远离产生的第二电容信号；并获取感测活体远离产生的第二湿度信号；
    根据所述第二电容信号和所述第二湿度信号生成活体远离信号，所述活体远离信号用于指示有活体远离。
  18. 根据权利要求17所述的方法，其特征在于，所述根据所述第二电容信号和所述第二湿度信号生成活体远离信号，包括：
    利用所述第二电容信号及所述第二湿度信号确定湿度的减小量及电容的减小量，并生成所述活体远离信号；
    或者，利用所述第二电容信号及所述第二湿度信号确定湿度的减小量及电容的增加量，并生成所述活体远离信号。
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