WO2016045265A1 - 一种手机及其自动接听电话的方法 - Google Patents

一种手机及其自动接听电话的方法 Download PDF

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Publication number
WO2016045265A1
WO2016045265A1 PCT/CN2015/070673 CN2015070673W WO2016045265A1 WO 2016045265 A1 WO2016045265 A1 WO 2016045265A1 CN 2015070673 W CN2015070673 W CN 2015070673W WO 2016045265 A1 WO2016045265 A1 WO 2016045265A1
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Prior art keywords
distance
mobile phone
microphone
ultrasonic signal
reflected back
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English (en)
French (fr)
Inventor
陈琼
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Huizhou TCL Mobile Communication Co Ltd
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Huizhou TCL Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a mobile phone and a method for automatically answering a call.
  • the technical problem to be solved by the present invention is to provide a mobile phone and a method for automatically answering a call, which can realize the function of automatically answering a call under any environment.
  • a technical solution adopted by the present invention is to provide a method for automatically answering a call by a mobile phone, wherein the mobile phone includes a front side and a back side, wherein a microphone is disposed on the front side, and the face is close to the microphone when the mobile phone is in a call state.
  • the method includes: when the mobile phone is in an incoming call state, sending an ultrasonic signal to the external space corresponding to the front of the mobile phone through the sonar generator; receiving the ultrasonic signal reflected back to the front through the microphone;
  • the frontal ultrasonic signal is converted into a digital signal by an analog to digital signal; the distance of the converted ultrasonic signal is calculated as the distance between the face and the front surface; the distance change is judged; if the distance value is smaller and smaller, and less than or equal to the preset
  • the distance is automatically connected to the incoming call; if the distance is greater than the preset distance, the ultrasonic signal that is reflected back to the front is continuously received through the microphone; the sonar generator and the microphone are turned on and off according to the state of the mobile phone.
  • the microphones are at least two, and the step of receiving the ultrasonic signal reflected back to the front side through the microphone comprises: receiving the ultrasonic signals reflected back to the front side by the at least two microphones respectively.
  • the step of converting the ultrasonic signal reflected back to the front side into a digital signal comprises: respectively performing analog-to-digital conversion of the ultrasonic signals received by the at least two microphones into digital signals; calculating a path distance of the converted ultrasonic signals,
  • the step of the distance between the face and the front surface specifically includes: calculating the path distance of the converted ultrasonic signal separately; taking the average of the sum of the path distances as the distance between the face and the front.
  • another technical solution adopted by the present invention is to provide a method for automatically answering a call by a mobile phone, wherein the mobile phone includes a front side and a back side, wherein a microphone is disposed on the front side, and the face is close to the microphone when the mobile phone is in a call state.
  • the method includes: when the mobile phone is in an incoming call state, sending an ultrasonic signal to the external space corresponding to the front of the mobile phone through the sonar generator; receiving the ultrasonic signal reflected back to the front through the microphone; Back to the front of the ultrasonic signal to obtain the distance of the ultrasonic signal, as the distance between the face and the front; determine the distance change; if the distance is smaller and smaller, and less than or equal to the preset distance, the call is automatically turned on; If the value is greater than the preset distance, the ultrasonic signal that is reflected back to the front is continuously received through the microphone.
  • the step of obtaining the path distance of the ultrasonic wave according to the ultrasonic signal reflected back to the front side comprises: performing analog-to-digital conversion of the ultrasonic signal reflected back to the front side into a digital signal; and calculating a path distance of the converted ultrasonic signal.
  • the microphones are at least two, and the step of receiving the ultrasonic signal reflected back to the front side through the microphone comprises: receiving the ultrasonic signals reflected back to the front side by the at least two microphones respectively.
  • the step of obtaining the path distance of the ultrasonic wave according to the ultrasonic signal reflected back to the front side comprises: respectively converting the ultrasonic signals received by the at least two microphones into a digital signal; respectively calculating a path distance of the converted ultrasonic signal; The average of the sum of the path distances is the distance between the face and the front.
  • the method further includes: controlling the opening and closing of the sonar generator and the microphone according to the state of the mobile phone.
  • a mobile phone which comprises: a microphone disposed on the front of the mobile phone, and configured to face the microphone when the mobile phone is in a call state, to perform through the microphone a sonar generator for transmitting an ultrasonic signal to an external space corresponding to the front of the mobile phone when the mobile phone is in an incoming call state; the microphone further receives an ultrasonic signal that is reflected back to the front; and the distance obtaining module is configured to be reflected Back to the front of the ultrasonic signal to obtain the distance of the ultrasonic signal, as the distance between the face and the front; the processor, used to determine the distance change; if the distance is smaller and smaller, and less than or equal to the preset distance, then automatically If the value of the distance is greater than the preset distance, the ultrasonic signal reflected back to the front side is continuously received through the microphone.
  • the distance obtaining module further includes: an analog-to-digital converter for performing analog-to-digital conversion of the ultrasonic signal reflected back to the front side into a digital signal; and a calculator for calculating a path distance of the converted ultrasonic signal.
  • the microphones are at least two, and at least two microphones respectively receive the ultrasonic signals reflected back to the front side.
  • the analog-to-digital converter respectively converts the ultrasonic signals received by the at least two microphones into a digital signal; the calculator separately calculates the path distance of the converted ultrasonic signals, and further takes the average of the sum of the path distances as a person The distance between the face and the front.
  • the mobile phone further includes a switch control module for controlling the opening and closing of the sonar generator and the microphone according to the state of the mobile phone.
  • the mobile phone of the present invention sends an ultrasonic signal to the external space corresponding to the front side of the mobile phone through the sonar generator, and further receives the ultrasonic signal reflected back to the front side through the microphone. Then, according to the ultrasonic signal reflected back to the front side, the distance of the ultrasonic signal is obtained, and the distance between the face and the front is further determined, and if the distance is smaller and smaller than or equal to the preset distance, the automatic connection is automatically performed. The incoming call, if the value of the distance is greater than the preset distance, continues to receive the ultrasonic signal reflected back to the front through the microphone.
  • the present invention can realize automatic answering call in any environment, and improves the user experience.
  • FIG. 1 is a schematic diagram of an internal structure of a mobile phone according to an embodiment of the present invention.
  • Figure 2 is a schematic view showing the external structure of the mobile phone shown in Figure 1;
  • FIG. 3 is a flowchart of a method for automatically answering a call by a mobile phone according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram showing the internal structure of a mobile phone according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing the external structure of the mobile phone shown in FIG.
  • the mobile phone of this embodiment includes a microphone 11, a sonar generator 12, a distance acquisition module 13, a processor 14, and an input and output module 15.
  • the input/output module 15 is electrically connected to the microphone 11, the sonar generator 12, the distance acquisition module 13, and the processor 14, respectively, as an interface for inputting and outputting signals.
  • the microphone 11 is disposed on the front side 110 of the mobile phone 10 for bringing the face closer to the microphone 11 when the mobile phone 10 is in a call state to make a call through the microphone 11.
  • the microphone of this embodiment is a MEMS (Micro Electro Mechanical System) microphone.
  • the sonar generator 12 is configured to emit an ultrasonic signal to an external space corresponding to the front surface 110 of the mobile phone 10 when the mobile phone 10 is in an incoming call state.
  • the microphone 11 further receives an ultrasonic signal that is reflected back to the front side 110.
  • the distance acquisition module 13 is configured to obtain a path distance of the ultrasonic signal from the ultrasonic signal reflected back to the front surface as the distance between the human face and the front surface 110.
  • the processor 14 is configured to determine the change of the distance. If the value of the distance is smaller and smaller than or equal to the preset distance, the incoming call is automatically turned on; if the value of the distance is greater than the preset distance, the receiving is continued through the microphone 11 The ultrasonic signal is reflected back to the front side.
  • the microphone 11 of the mobile phone is used for the call. Therefore, in this embodiment, it is determined whether the phone is automatically connected by judging the change of the distance between the mobile phone and the face. In other words, when it is determined that the distance is gradually decreasing, the mobile phone 10 is slowly approaching the face, and when the distance is less than or equal to a preset value, for example, 3 cm, the call is automatically answered. It does not require the user to manually connect the phone, which brings convenience to the user.
  • the embodiment of the present invention utilizes the MEMS microphone 11 to receive the ultrasonic signal reflected back to the front surface 110 of the mobile phone 10.
  • the acoustic sensitivity of the MEMS microphone 11 can be utilized to support the characteristics of the higher bandwidth sound signal, in particular It is a feature that the sound above 20KHz can be effectively captured, and the ultrasonic signal emitted by the sonar generator 12 is better obtained, so that the data is more accurate.
  • the use of the microphone 11 is not affected by any environment, and can be operated in any environment, improving the user's experience.
  • the microphone 11 of the embodiment is at least two, and at least two microphones 11 respectively receive the ultrasonic signals reflected back to the front side. As shown in FIG. 2, the present embodiment provides four microphones 11 which are respectively located at four top corner positions of the front surface 110 of the mobile phone 10.
  • the distance acquisition module 13 further includes an analog to digital converter 131 and a calculator 132.
  • the analog to digital converter 131 is used to analog to digitally convert the ultrasonic signal reflected back to the front side 110 into a digital signal.
  • the calculator 132 is used to calculate the path distance of the converted ultrasonic signal.
  • this embodiment will exemplify the use of two microphones 11 at the top of the front side 110 of the handset 10 to receive ultrasonic signals that are reflected back to the front.
  • the sonar generator 12 is located in the middle of the two microphones 11.
  • the two microphones 11 at the top of the front side 110 of the handset 10 receive ultrasonic signals that are reflected back to the front, respectively.
  • the analog-to-digital converter 131 respectively performs analog-to-digital conversion of the ultrasonic signals received by the two microphones 11 into digital signals.
  • the calculator 132 calculates the path distance of the converted ultrasonic signal, respectively, and further takes the average of the sum of the path distances as the distance between the face and the front side 110 of the mobile phone 10.
  • the ultrasonic signal reflected back to the front side is received by the at least two microphones 11, and the accuracy of the data can be further improved.
  • the microphone 11 since the microphone 11 has a unique high sampling rate support, the sound generated by the fine flow or vibration of the air can be captured, and a relatively significant electric frequency change can be generated. Therefore, the microphone 11 of the present embodiment also receives the air.
  • the frequency signal emitted by the vibration the processor 14 further eliminates the frequency signal emitted by the vibration of the air. Thereby, the interference caused by the vibration of the air can be removed, and the accuracy of the data is further improved.
  • the input and output module 15 further controls the opening and closing of the sonar generator 12 and the microphone 11 according to the state of the mobile phone 10.
  • the mobile phone 10 further includes a radio frequency receiving module 16 and an antenna.
  • the processor 14 controls the input and output module. 15 goes to control the sonar generator 12 and the microphone 11 to turn on. If the incoming call signal is not received, the sonar generator 12 and the microphone 11 are controlled to be turned off, thereby saving power.
  • the mobile phone 10 can also receive an incoming call signal through another module, using a wifi module or the like.
  • the microphone 11 when the mobile phone 10 is in an incoming call state, the microphone 11 receives the ultrasonic signal reflected by the sonar generator 12 and reflected back to the front surface 110 of the mobile phone 10, and then analyzes according to the ultrasonic signal, if the analysis is performed.
  • the distance between the face and the front side 110 of the mobile phone 10 is getting smaller and smaller, and less than or equal to the preset distance, the incoming call is automatically turned on. Convenient for the user. And the microphone 11 can be applied to any environment, improving the user experience.
  • the distance between the face and the front of the mobile phone 10 can be further determined when the mobile phone 10 is in a call state.
  • the sonar generator 12 continues to operate while the handset 10 is in a call state, i.e., emits an ultrasonic signal, and the microphone 11 continues to receive ultrasonic signals that are reflected back to the front side 110 of the handset 10.
  • the processor 14 controls the backlight of the mobile phone screen to be turned on, and analyzes the face and the mobile phone 10
  • the backlight of the control phone screen is turned off. Therefore, the user needs to operate the screen in the call state, for example, when the information is input according to the language, the backlight is turned on in time to facilitate the user's operation. And further, when the user only answers the call and does not need to operate the screen of the mobile phone, the backlight is turned off to achieve the effect of power saving.
  • the invention also provides a method for automatically answering a call by a mobile phone based on the mobile phone described above. See Figure 3 for details.
  • the method for automatically answering a call by a mobile phone includes the following steps:
  • Step S1 When the mobile phone is in an incoming call state, an ultrasonic signal is sent to the external space corresponding to the front side of the mobile phone through the sonar generator.
  • Step S2 Receiving an ultrasonic signal reflected back to the front side through the microphone.
  • the microphone of this embodiment is a MEMS (Micro Electro Mechanical System) microphone. And at least two microphones are included, for example, the mobile phone described above includes 4 microphones.
  • the ultrasonic signals reflected back to the front side are respectively received by at least two microphones.
  • Step S3 obtaining the path distance of the ultrasonic signal according to the ultrasonic signal reflected back to the front surface as the distance between the face and the front surface.
  • the ultrasonic signal reflected back to the front side is subjected to analog-to-digital conversion into a digital signal, and the path distance of the converted ultrasonic signal is further calculated.
  • step S2 is to receive the ultrasonic signals reflected back to the front side by the at least two microphones respectively. Then, the step is to separately convert the ultrasonic signals received by the at least two microphones into digital signals, and separately calculate the path distance of the converted ultrasonic signals, and further take the average value of the sum of the path distances as the face and the front. the distance.
  • Step S4 judging the change of the distance
  • Step S5 If the value of the distance becomes smaller and smaller, and is less than or equal to the preset distance, the incoming call is automatically turned on.
  • the phone Since the user is going to pick up the phone, the phone is placed close to the ear (ie, the face), and the phone is used to make a call. Therefore, in this step, when it is judged that the distance is gradually decreasing, the mobile phone is slowly approaching the face, and when the distance is less than or equal to a preset value, for example, 3 cm, the call is automatically answered. It does not require the user to manually connect the phone, which brings convenience to the user.
  • Step S6 If the value of the distance is greater than the preset distance, continue to receive the ultrasonic signal reflected back to the front side through the microphone.
  • the MEMS microphone is used to receive the ultrasonic signal reflected back to the front surface of the mobile phone, and on the one hand, the higher acoustic sensitivity of the MEMS microphone can be utilized to support the characteristics of the higher bandwidth sound signal, especially higher than The 20KHz sound can be effectively captured, and the ultrasonic signal from the sonar generator can be better obtained, making the data more accurate.
  • the use of the microphone is not affected by any environment and can be operated in any environment, improving the user experience.
  • the microphone since the microphone has a unique high sampling rate support, the sound generated by the fine flow or vibration of the air can be captured, and a relatively obvious electric frequency change can be generated. Therefore, the present embodiment further receives the vibration generated by the air through the microphone. The frequency signal then eliminates the frequency signal emitted by the vibration of the air. Thereby, the interference caused by the vibration of the air can be removed, and the accuracy of the data is further improved.
  • the embodiment controls the opening and closing of the sonar generator and the microphone according to the state of the mobile phone. In this way, the sonar generator and the microphone can be turned on when the mobile phone is in an incoming call state, and the sonar generator and the microphone are turned off when the mobile phone is in a non-incoming state, thereby saving power.
  • the distance between the face and the front of the mobile phone can be further determined when the mobile phone is in a call state.
  • the sonar generator continues to be in a working state when the mobile phone is in a call state, that is, an ultrasonic signal is emitted, and the microphone also continues to receive an ultrasonic signal reflected back to the front of the mobile phone. If the distance between the face and the front of the mobile phone is increased according to the ultrasonic signal, and the distance is greater than the preset distance, the processor controls the backlight of the mobile phone screen to be turned on, and the distance between the face and the front of the mobile phone is analyzed.
  • the backlight of the control phone screen is turned off. Therefore, the user needs to operate the screen in the call state, for example, when the information is input according to the language, the backlight is turned on in time to facilitate the user's operation. And further, when the user only answers the call and does not need to operate the screen of the mobile phone, the backlight is turned off to achieve the effect of power saving.
  • the present invention receives the ultrasonic signal reflected by the sonar generator 12 and reflected back to the front surface 110 of the mobile phone 10 through the microphone 11 when the mobile phone 10 is in the incoming call state, and then analyzes according to the ultrasonic signal, if the analysis is performed.
  • the distance between the face and the front side 110 of the mobile phone 10 is getting smaller and smaller, and less than or equal to the preset distance, the incoming call is automatically turned on. Convenient for the user.
  • the microphone 11 can be applied to any environment, improving the user experience.

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Abstract

本发明公开了一种手机及其自动接听电话的方法。该手机包括正面和背面，其中，正面设置有麦克风，在手机处于通话状态时，人脸靠近麦克风，以通过麦克风进行通话。该方法包括：在手机处于来电呼叫状态时，通过声纳发生器向手机的正面所对应的外部空间发出超声波信号；通过麦克风接收被反射回正面的超声波信号；根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面的距离；判断距离变化情况；若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电；若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号。通过上述方式，本发明可以在任何环境下实现自动接听电话，提高了用户的体验。

Description

一种手机及其自动接听电话的方法
【技术领域】
本发明涉及通信技术领域，尤其是涉及一种手机及其自动接听电话的方法。
【背景技术】
随着手持移动设备的快速普及以及用户对手持移动设备智能化要求进一步加强。开发商致力于设计更多的智能化功能，使得更加方便用户使用。例如，在手机来电时，通过测量手机与人脸的距离来自动接听电话，大大的方便了用户。现有技术中，为了做出更多更炫的APP作为亮点，通常采用光敏传感器来测量手机与人脸的距离。
这就限制了一定的使用环境，若在比较暗的环境下，则不方便进行操作。
【发明内容】
本发明主要解决的技术问题是提供一种手机及其自动接听电话的方法，能够在任何环境下均可以实现自动接听电话的功能。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种手机自动接听电话的方法，手机包括正面和背面，其中，正面设置有麦克风，在手机处于通话状态时，人脸靠近麦克风，以通过麦克风进行通话，方法包括：在手机处于来电呼叫状态时，通过声纳发生器向手机的正面所对应的外部空间发出超声波信号；通过麦克风接收被反射回正面的超声波信号；将被反射回正面的超声波信号进行模数转换成数字信号；计算转换后的超声波信号的途径距离，作为人脸与正面的距离；判断距离变化情况；若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电；若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号；根据手机的状态控制声纳发生器和麦克风的开启与关闭。
其中，麦克风至少为两个，通过麦克风接收被反射回正面的超声波信号的步骤包括：通过至少两个麦克风分别接收被反射回正面的超声波信号。
其中，将被反射回正面的超声波信号进行模数转换成数字信号的步骤包括：分别将至少两个麦克风接收到的超声波信号进行模数转换成数字信号；计算转换后的超声波信号的途径距离，作为人脸与正面的距离的步骤具体包括：分别计算转换后的超声波信号的途径距离；取途径距离的和的平均值作为人脸与正面的距离。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种手机自动接听电话的方法，手机包括正面和背面，其中，正面设置有麦克风，在手机处于通话状态时，人脸靠近麦克风，以通过麦克风进行通话，方法包括：在手机处于来电呼叫状态时，通过声纳发生器向手机的正面所对应的外部空间发出超声波信号；通过麦克风接收被反射回正面的超声波信号；根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面的距离；判断距离变化情况；若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电；若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号。
其中，根据被反射回正面的超声波信号获得超声波的途径距离的步骤包括：将反射回正面的超声波信号进行模数转换成数字信号；计算转换后的超声波信号的途径距离。
其中，麦克风至少为两个，通过麦克风接收被反射回正面的超声波信号的步骤包括：通过至少两个麦克风分别接收被反射回正面的超声波信号。
其中，根据被反射回正面的超声波信号获得超声波的途径距离的步骤包括：分别将至少两个麦克风接收到的超声波信号进行模数转换成数字信号；分别计算转换后的超声波信号的途径距离；取途径距离的和的平均值作为人脸与正面的距离。
其中，方法还包括：根据手机的状态控制声纳发生器和麦克风的开启与关闭。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种手机，手机包括：麦克风，设置在手机的正面，用于在手机处于通话状态时，人脸靠近麦克风，以通过麦克风进行通话；声纳发生器，用于在手机处于来电呼叫状态时，向手机的正面所对应的外部空间发出超声波信号；麦克风进一步接收被反射回正面的超声波信号；距离获取模块，用于根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面的距离；处理器，用于判断距离变化情况；若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电；若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号。
其中，距离获取模块进一步包括：模数转换器，用于将反射回正面的超声波信号进行模数转换成数字信号；计算器，用于计算转换后的超声波信号的途径距离。
其中，麦克风至少为两个，至少两个麦克风分别接收被反射回正面的超声波信号。
其中，模数转换器分别将至少两个麦克风接收到的超声波信号进行模数转换成数字信号；计算器分别计算转换后的超声波信号的途径距离，并进一步取途径距离的和的平均值作为人脸与正面的距离。
其中，手机进一步包括开关控制模块，用于根据手机的状态控制声纳发生器和麦克风的开启与关闭。
本发明的有益效果是：区别于现有技术的情况，本发明的手机通过声纳发生器向手机的正面所对应的外部空间发出超声波信号，并进一步通过麦克风接收被反射回正面的超声波信号，然后根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面的距离，进一步判断距离变化情况，若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电，若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号。通过上述方式，本发明可以在任何环境下实现自动接听电话，提高了用户的体验。
【附图说明】
图1是本发明实施例提供的一种手机的内部结构示意图；
图2是图1所示的手机的外部结构示意图；
图3是本发明实施例提供的一种手机自动接听电话的方法的流程图。
【具体实施方式】
请一并参阅图1和图2，图1是本发明实施例提供的一种手机的内部结构示意图，图2是图1所示的手机的外部结构示意图。如图1和图2所示，本实施例的手机包括麦克风11、声纳发生器12、距离获取模块13、处理器14以及输入输出模块15。
其中，输入输出模块15分别与麦克风11、声纳发生器12、距离获取模块13以及处理器14电连接，作为信号的输入和输出的接口。
麦克风11设置在手机10的正面110，用于在手机10处于通话状态时，人脸靠近麦克风11，以通过麦克风11进行通话。本实施例的麦克风为MEMS（微型机电系统）麦克风。
声纳发生器12用于在手机10处于来电呼叫状态时，向手机10的正面110所对应的外部空间发出超声波信号。麦克风11进一步接收被反射回正面110的超声波信号。
距离获取模块13用于根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面110的距离。
处理器14用于判断该距离的变化情况，若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电；若距离的数值大于预设距离，则继续通过麦克风11接收被反射回正面的超声波信号。
由于在用户要接听电话时，会将手机10靠近耳朵（即人脸），利用手机的麦克风11进行通话。因此本实施例通过判断手机与人脸的距离的变化情况来判断是否该自动接通电话。换而言之，在判断到距离慢慢变小时，说明手机10慢慢贴近人脸，当距离小于或等于预设的值时，例如3厘米时，即自动接听电话。不需要用户手动接通电话，给用户带了便利。
应理解，在手机10与人脸的距离大于预设距离时，不管其距离的变化情况是越来越小还是越来越大或者是固定不变，都不会接通电话。
此外，本发明实施例是利用MEMS麦克风11来接收被反射回手机10的正面110的超声波信号，一方面可以利用MEMS麦克风11较高的声学敏感性，支持较高带宽的声音信号的特点，特别是在高于20KHz的声音能够有效的捕获的特点，更好的获取声纳发生器12发出的超声波信号，使得数据更加准确。另一方面，麦克风11的使用不受任何环境的影响，可以在任何环境下进行操作，提高了用户的体验。
其中，为了进一步增加数据的准确性，本实施例的麦克风11至少为两个，至少两个麦克风11分别接收被反射回正面的超声波信号。如图2所示，本实施例设置了4个麦克风11，其分别位于手机10的正面110的四个顶角位置。
本实施例中，距离获取模块13进一步包括模数转换器131和计算器132。模数转换器131用于将反射回正面110的超声波信号进行模数转换成数字信号。计算器132用于计算转换后的超声波信号的途径距离。
具体而言，本实施例将举例利用手机10的正面110的顶部的两个麦克风11接收被反射回正面的超声波信号。其中，声纳发生器12位于该两个麦克风11的中间。
手机10的正面110的顶部的两个麦克风11分别接收被反射回正面的超声波信号。模数转换器131分别将该两个麦克风11接收到的超声波信号进行模数转换成数字信号。计算器132分别计算转换后的超声波信号的途径距离，并进一步取途径距离的和的平均值作为人脸与手机10的正面110的距离。
由此，利用至少两个麦克风11接收被反射回正面的超声波信号，可以进一步提高数据的准确性。
此外，由于麦克风11具有特有的高采样率的支持，对于空气细微的流动或者振动而产生的声音进行捕捉，可以产生比较明显的电频变化，因此，本实施例的麦克风11还接收由空气的震动发出的频率信号，处理器14进一步消除由空气的震动发出的频率信号。由此，可以去除空气的震动而产生的干扰，进一步提高了数据的准确性。
本实施例中，输入输出模块15进一步根据手机10的状态控制声纳发生器12和麦克风11的开启与关闭。具体为，手机10还包括一射频接收模块16和天线，在手机10来电时，其将接收到的来电信号发送到处理器14中，处理器14接收到该来电信号后，通过控制输入输出模块15去控制声纳发生器12和麦克风11开启。若没有接收到来电信号，则控制声纳发生器12和麦克风11关闭，由此可以节省电量。
应理解，若是网络电话或者其他途径的来电时，手机10还可以通过其他模块，利用wifi模块等来接收来电信号。
承前所述，本实施例在手机10处于来电呼叫状态时，通过麦克风11接收声纳发生器12发出的反射回手机10的正面110的超声波信号，再根据该超声波信号进行分析，若分析出人脸与手机10的正面110的距离越来越小，并且小于或等于预设距离，则自动接通来电。方便了用户。并且麦克风11可以适用于任何环境下，提高了用户的体验。
进一步的，本实施例还可以在手机10处于通话状态时进一步判断人脸与手机10的正面的距离。具体来说，声纳发生器12在手机10处于通话状态时，继续保持工作状态，即发出超声波信号，麦克风11同样继续接收反射回手机10的正面110的超声波信号。若根据该超声波信号进行分析出人脸与手机10的正面110的距离越来越大，并且大于预设距离，则处理器14控制手机屏幕的背光开启，并在分析出人脸与手机10的正面110的距离越来越小，并且小于或等于预设距离时，控制手机屏幕的背光关闭。由此可以在通话状态下用户需要对屏幕进行操作，例如，根据语言输入信息时，及时地开启背光，便于用户操作。并进一步在用户仅是接听电话，不需要对手机屏幕进行操作时，关闭背光，达到省电的效果。
本发明还基于前文所述的手机提供一种手机自动接听电话的方法。具体请参阅图3。
如图3所示，手机自动接听电话的方法的包括以下步骤：
步骤S1：在手机处于来电呼叫状态时，通过声纳发生器向手机的正面所对应的外部空间发出超声波信号。
步骤S2：通过麦克风接收被反射回正面的超声波信号。本实施例的麦克风为MEMS（微型机电系统）麦克风。并且至少包括两个麦克风，例如前文所述的手机包括4个麦克风。
本步骤中，为了提高数据的准确性，具体为通过至少两个麦克风分别接收被反射回正面的超声波信号。
步骤S3：根据被反射回正面的超声波信号获得超声波信号的途径距离，作为人脸与正面的距离。
本步骤中，具体为将反射回正面的超声波信号进行模数转换成数字信号，并进一步计算转换后的超声波信号的途径距离。
若步骤S2为通过至少两个麦克风分别接收被反射回正面的超声波信号。则本步骤具体为分别将至少两个麦克风接收到的超声波信号进行模数转换成数字信号，并分别计算转换后的超声波信号的途径距离，进一步取途径距离的和的平均值作为人脸与正面的距离。
步骤S4：判断距离变化情况；
步骤S5：若距离的数值越来越小，并且小于或等于预设距离，则自动接通来电。
由于在用户要接听电话时，会将手机靠近耳朵（即人脸），利用手机的麦克风进行通话。因此本步骤在判断到距离慢慢变小时，说明手机慢慢贴近人脸，当距离小于或等于预设的值时，例如3厘米时，即自动接听电话。不需要用户手动接通电话，给用户带了便利。
步骤S6：若距离的数值大于预设距离，则继续通过麦克风接收被反射回正面的超声波信号。
应理解，在手机10与人脸的距离大于预设距离时，不管其距离的变化情况是越来越小还是越来越大或者是固定不变，都不会接通电话。
因此，本实施例中，利用MEMS麦克风来接收被反射回手机的正面的超声波信号，一方面可以利用MEMS麦克风较高的声学敏感性，支持较高带宽的声音信号的特点，特别是在高于20KHz的声音能够有效的捕获的特点，更好的获取声纳发生器发出的超声波信号，使得数据更加准确。另一方面，麦克风的使用不受任何环境的影响，可以在任何环境下进行操作，提高了用户的体验。
此外，由于麦克风具有特有的高采样率的支持，对于空气细微的流动或者振动而产生的声音进行捕捉，可以产生比较明显的电频变化，因此，本实施例进一步通过麦克风接收由空气的震动发出的频率信号，然后消除由空气的震动发出的频率信号。由此，可以去除空气的震动而产生的干扰，进一步提高了数据的准确性。
此外，本实施例还根据手机的状态控制声纳发生器和麦克风的开启与关闭。由此可以在手机处于来电状态时，开启声纳发生器和麦克风，在手机处于非来电状态时，关闭声纳发生器和麦克风，由此，可以节省电量。
此外，本实施例还可以在手机处于通话状态时进一步判断人脸与手机的正面的距离。具体来说，声纳发生器在手机处于通话状态时，继续保持工作状态，即发出超声波信号，麦克风同样继续接收反射回手机的正面的超声波信号。若根据该超声波信号进行分析出人脸与手机的正面的距离越来越大，并且大于预设距离，则处理器控制手机屏幕的背光开启，并在分析出人脸与手机的正面的距离越来越小，并且小于或等于预设距离时，控制手机屏幕的背光关闭。由此可以在通话状态下用户需要对屏幕进行操作，例如，根据语言输入信息时，及时地开启背光，便于用户操作。并进一步在用户仅是接听电话，不需要对手机屏幕进行操作时，关闭背光，达到省电的效果。
综上所述，本发明在手机10处于来电呼叫状态时，通过麦克风11接收声纳发生器12发出的反射回手机10的正面110的超声波信号，再根据该超声波信号进行分析，若分析出人脸与手机10的正面110的距离越来越小，并且小于或等于预设距离，则自动接通来电。方便了用户。并且麦克风11可以适用于任何环境下，提高了用户的体验。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种手机自动接听电话的方法，所述手机包括正面和背面，其中，所述正面设置有麦克风，在手机处于通话状态时，人脸靠近所述麦克风，以通过所述麦克风进行通话，其中，所述方法包括：
    在手机处于来电呼叫状态时，通过声纳发生器向所述手机的正面所对应的外部空间发出超声波信号；
    通过所述麦克风接收被反射回所述正面的超声波信号；
    将所述被反射回所述正面的超声波信号进行模数转换成数字信号；
    计算转换后的所述超声波信号的途径距离，作为人脸与所述正面的距离；
    判断所述距离变化情况；
    若所述距离的数值越来越小，并且小于或等于预设距离，则自动接通所述来电；
    若所述距离的数值大于预设距离，则继续通过所述麦克风接收被反射回所述正面的超声波信号；
    根据所述手机的状态控制所述声纳发生器和所述麦克风的开启与关闭。
  2. 根据权利要求1所述的方法，其中，所述麦克风至少为两个，所述通过所述麦克风接收被反射回所述正面的超声波信号的步骤包括：
    通过至少两个所述麦克风分别接收被反射回所述正面的超声波信号。
  3. 根据权利要求2所述的方法，其中，所述将所述被反射回所述正面的超声波信号进行模数转换成数字信号的步骤包括：
    分别将所述至少两个所述麦克风接收到的超声波信号进行模数转换成数字信号；
    所述计算转换后的所述超声波信号的途径距离，作为人脸与所述正面的距离的步骤具体包括：
    分别计算转换后的超声波信号的途径距离；
    取所述途径距离的和的平均值作为人脸与所述正面的距离。
  4. 一种手机自动接听电话的方法，所述手机包括正面和背面，其中，所述正面设置有麦克风，在手机处于通话状态时，人脸靠近所述麦克风，以通过所述麦克风进行通话，其中，所述方法包括：
    在手机处于来电呼叫状态时，通过声纳发生器向所述手机的正面所对应的外部空间发出超声波信号；
    通过所述麦克风接收被反射回所述正面的超声波信号；
    根据被反射回所述正面的超声波信号获得所述超声波信号的途径距离，作为人脸与所述正面的距离；
    判断所述距离变化情况；
    若所述距离的数值越来越小，并且小于或等于预设距离，则自动接通所述来电；
    若所述距离的数值大于预设距离，则继续通过所述麦克风接收被反射回所述正面的超声波信号。
  5. 根据权利要求4所述的方法，其中，所述根据被反射回所述正面的超声波信号获得所述超声波的途径距离的步骤包括：
    将所述反射回所述正面的超声波信号进行模数转换成数字信号；
    计算转换后的所述超声波信号的途径距离。
  6. 根据权利要求5所述的方法，其中，所述麦克风至少为两个，所述通过所述麦克风接收被反射回所述正面的超声波信号的步骤包括：
    通过至少两个所述麦克风分别接收被反射回所述正面的超声波信号。
  7. 根据权利要求6所述的方法，其中，所述根据被反射回所述正面的超声波信号获得所述超声波的途径距离的步骤包括：
    分别将所述至少两个所述麦克风接收到的超声波信号进行模数转换成数字信号；
    分别计算转换后的超声波信号的途径距离；
    取所述途径距离的和的平均值作为人脸与所述正面的距离。
  8. 根据权利要求4所述的方法，其中，所述方法还包括：
    根据所述手机的状态控制所述声纳发生器和所述麦克风的开启与关闭。
  9. 一种手机，其中，所述手机包括：
    麦克风，设置在所述手机的正面，用于在所述手机处于通话状态时，人脸靠近所述麦克风，以通过所述麦克风进行通话；
    声纳发生器，用于在所述手机处于来电呼叫状态时，向所述手机的正面所对应的外部空间发出超声波信号；
    所述麦克风进一步接收被反射回所述正面的超声波信号；
    距离获取模块，用于根据被反射回所述正面的超声波信号获得所述超声波信号的途径距离，作为人脸与所述正面的距离；
    处理器，用于判断所述距离变化情况；若所述距离的数值越来越小，并且小于或等于预设距离，则自动接通所述来电；若所述距离的数值大于预设距离，则继续通过所述麦克风接收被反射回所述正面的超声波信号。
  10. 根据权利要求9所述的手机，其中，所述距离获取模块进一步包括：
    模数转换器，用于将所述反射回所述正面的超声波信号进行模数转换成数字信号；
    计算器，用于计算转换后的所述超声波信号的途径距离。
  11. 根据权利要求10所述的手机，其中，所述麦克风至少为两个，所述至少两个麦克风分别接收被反射回所述正面的超声波信号。
  12. 根据权利要求11所述的手机，其中，所述模数转换器分别将所述至少两个所述麦克风接收到的超声波信号进行模数转换成数字信号；
    所述计算器分别计算转换后的超声波信号的途径距离，并进一步取所述途径距离的和的平均值作为人脸与所述正面的距离。
  13. 根据权利要求9所述的手机，其中，所述手机进一步包括开关控制模块，用于根据所述手机的状态控制所述声纳发生器和所述麦克风的开启与关闭。
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