CN111479020A - System and method for reducing SAR (synthetic aperture radar) of mobile phone - Google Patents
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Abstract
Description
技术领域technical field
本发明属于手机技术领域，尤其涉及一种手机降SAR的系统及方法。The invention belongs to the technical field of mobile phones, and in particular relates to a system and method for reducing SAR of mobile phones.
背景技术Background technique
SAR即英语“Specific Absorption Rate”的缩写，意为电磁波吸收比值或比吸收率。是手机或无线产品之电磁波能量吸收比值，其定义为：在外电磁场的作用下，人体内将产生感应电磁场。由于人体各种器官均为有耗介质，因此体内电磁场将会产生电流，导致吸收和耗散电磁能量。生物剂量学中常用SAR来表征这一物理过程。SAR的意义为单位质量的人体组织所吸收或消耗的电磁功率，单位为W/kg。SAR值一般指手机产品中电磁波所产生的热能，它是对人体产生影响的衡量数据，单位是W/Kg(瓦/公斤)。美国联邦传播委员会(FCC)所公布行动电话的安全标准值为1.6，因此只要行动电话的SAR值在1.6以下，都是在安全标准内的产品。SAR值表示行动电话的热能会对人体会造成多少影响，数值越大，表示对人体的影响越大；反之则影响较小。关于手机对人体的辐射SAR(Specific Absorption Rate，电磁波能量吸收比)，美国和欧洲已经有了规定，美国标准为1.6W/kg(1克)，欧洲标准为2.0W/kg(10克)国际科学界用“SAR”值来对手机辐射进行量化和测量。对于测量手机产品的“SAR”，通俗地讲，就是测量手机辐射对人体的影响是否符合标准。国际通用的标准为：以6分钟计时，每公斤脑组织吸收的电磁辐射能量不得超过2瓦。这一标准作为国际业界的通用标准。SAR is the abbreviation of "Specific Absorption Rate" in English, which means electromagnetic wave absorption ratio or specific absorption rate. It is the electromagnetic wave energy absorption ratio of mobile phones or wireless products, which is defined as: under the action of external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are dissipative media, the electromagnetic field in the body will generate electric current, resulting in the absorption and dissipation of electromagnetic energy. SAR is often used in biological dosimetry to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed by a unit mass of human tissue, in W/kg. The SAR value generally refers to the thermal energy generated by electromagnetic waves in mobile phone products, which is a measure of the impact on the human body, and the unit is W/Kg (watts/kg). The US Federal Communications Commission (FCC) announced that the safety standard value of mobile phones is 1.6, so as long as the SAR value of a mobile phone is below 1.6, it is a product within the safety standard. The SAR value indicates how much the thermal energy of the mobile phone will affect the human body. The larger the value, the greater the impact on the human body; otherwise, the impact is small. Regarding the radiation SAR (Specific Absorption Rate, electromagnetic wave energy absorption ratio) of mobile phones to the human body, the United States and Europe have already stipulated, the American standard is 1.6W/kg (1 gram), and the European standard is 2.0W/kg (10 grams) International The scientific community uses the "SAR" value to quantify and measure cell phone radiation. For the measurement of "SAR" of mobile phone products, in layman's terms, it is to measure whether the impact of mobile phone radiation on the human body meets the standard. The international standard is: in 6 minutes, the electromagnetic radiation energy absorbed by each kilogram of brain tissue should not exceed 2 watts. This standard is used as a general standard in the international industry.
目前，传统的降SAR方案是直接将天线功率降低好几个dB,这样会导致只有刚注册网络时候手机天线是正产功率，当用户手握开始就一直处于低功率，很大程度影响用户上网，打电话等体验。At present, the traditional SAR reduction solution is to directly reduce the antenna power by several dB, which will cause the mobile phone antenna to produce power only when the network is just registered. When the user starts to hold the hand, the power is always low, which greatly affects the user's ability to surf the Internet and make phone calls. phone experience.
综上，现亟需一种能够解决上述技术问题，能够使手机一直处于信号最好同时整机SAR值不超标，手机一直在计算此时的场景，不用降SAR的场景会自动识别出来，这样能使设备一直处于信号最优的时候，并且SAR不超标，不会对人体造成伤害。To sum up, there is an urgent need for a solution that can solve the above technical problems, so that the mobile phone can always be in the best signal and the SAR value of the whole machine does not exceed the standard. It can keep the device at the optimal signal time, and the SAR does not exceed the standard and will not cause harm to the human body.
发明内容SUMMARY OF THE INVENTION
鉴于上述现有技术的不足之处，本发明的目的在于提供一种手机降SAR的系统及方法，旨在解决现有技术直接将天线功率降低好几个dB,这样会导致只有刚注册网络时候手机天线是正产功率，当用户手握开始就一直处于低功率，很大程度影响用户体验的问题。In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a system and method for reducing SAR of a mobile phone, aiming to solve the problem that the prior art directly reduces the antenna power by several dB, which will cause the mobile phone only when the network is just registered. The antenna is positive power. When the user starts to hold it, the power is always low, which greatly affects the user experience.
为了达到上述目的，本发明采取了以下技术方案：In order to achieve the above object, the present invention has adopted the following technical solutions:
一种手机降SAR系统，其特征在于，包括：A mobile phone SAR reduction system is characterized in that, comprising:
天线单元，其用于接收和发送无线电波；Antenna units, which are used to receive and transmit radio waves;
感应单元，其用于通过获取感应信号以检测有无东西靠近手机；The sensing unit, which is used to detect whether something is approaching the mobile phone by acquiring the sensing signal;
总处理单元，其用于根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入所述天线单元正常发送、接收，且分别与所述感应单元和所述天线单元连接；The total processing unit is used to calculate and determine whether the SAR of the mobile phone exceeds the standard according to the induction signal. If it exceeds the standard, it will send a SAR reduction command. the antenna unit is connected;
第一SAR处理单元，其用于根据所述总处理单元的降SAR指令计算并判定需要降功率并发送第一降功率指令，且与所述总处理单元连接；a first SAR processing unit, configured to calculate and determine that power reduction is required according to the SAR reduction command of the total processing unit, and send a first power reduction command, and is connected to the total processing unit;
主芯片，其用于接收所述第一降功率指令并将所述第一降功率指令转发送，且与所述第一SAR处理单元连接；a main chip, which is configured to receive the first power reduction command and transmit the first power reduction command, and is connected to the first SAR processing unit;
第一功率放大器，其用于根据所述主芯片的第一降功率指令降低功率生成第一降低后功率，并与所述主芯片连接；a first power amplifier, which is configured to reduce power according to the first power reduction instruction of the main chip to generate a first reduced power, and is connected to the main chip;
第二SAR处理单元，其用于根据第一降低后功率计算并发送第二降功率指令，并与所述第一功率放大器连接；a second SAR processing unit, configured to calculate and send a second power reduction command according to the first reduced power, and be connected to the first power amplifier;
第二功率放大器，其用于根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入所述天线单元进行发送、接收，并与所述天线单元连接。a second power amplifier, configured to reduce power according to the second power command to generate a second reduced power, enter the antenna unit with the second reduced power for transmission and reception, and connect to the antenna unit .
优选的，所述感应单元为天线。Preferably, the induction unit is an antenna.
优选的，所述判断手机SAR是否超标采用FCC或CE标准。Preferably, the FCC or CE standard is used for determining whether the SAR of the mobile phone exceeds the standard.
另外的，本发明还提供一种手机降SAR的方法，其特征在于，包括以下步骤：In addition, the present invention also provides a method for reducing the SAR of a mobile phone, which is characterized in that it includes the following steps:
获取感应信号以检测有无东西靠近手机；Obtain sensor signals to detect if something is approaching the phone;
根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入天线单元正常发送、接收；Calculate and determine whether the SAR of the mobile phone exceeds the standard according to the inductive signal, if it exceeds the standard, send a SAR reduction command, and if it does not exceed the standard, directly enter the antenna unit to send and receive normally;
根据所述降SAR指令计算并判定需要降功率并发送第一降功率指令；Calculate and determine that power reduction is required according to the SAR reduction instruction and send the first power reduction instruction;
接收所述第一降功率指令并将所述第一降功率指令转发送；receiving the first power reduction command and forwarding the first power reduction command;
根据所述第一降功率指令降低功率生成第一降低后功率；Reduce power according to the first power reduction command to generate a first reduced power;
根据第一降低后功率计算并发送第二降功率指令；Calculate and send a second power reduction command according to the first reduced power;
根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入天线单元进行发送、接收。The power is reduced according to the second power command to generate a second reduced power, and the second reduced power is used to enter the antenna unit for transmission and reception.
与现有技术相比，本发明的有益效果：Compared with the prior art, the beneficial effects of the present invention:
本发明提供的一种手机降SAR系统及方法，其系统包括：天线单元，其用于接收和发送无线电波；感应单元，其用于通过获取感应信号以检测有无东西靠近手机；总处理单元，其用于根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入所述天线单元正常发送、接收，且分别与所述感应单元和所述天线单元连接；第一SAR处理单元，其用于根据所述总处理单元的降SAR指令计算并判定需要降功率并发送第一降功率指令，且与所述总处理单元连接；主芯片，其用于接收所述第一降功率指令并将所述第一降功率指令转发送，且与所述第一SAR处理单元连接；第一功率放大器，其用于根据所述主芯片的第一降功率指令降低功率生成第一降低后功率，并与所述主芯片连接；第二SAR处理单元，其用于根据第一降低后功率计算并发送第二降功率指令，并与所述第一功率放大器连接；第二功率放大器，其用于根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入所述天线单元进行发送、接收，并与所述天线单元连接。通过上述设计，使手机一直处于信号最好时候同时整机SAR值不超标，手机一直在计算此时的场景，不用降SAR的场景会自动识别出来，这样能使设备一直处于信号最优的时候，并且SAR不超标，不会对人体造成伤害。The present invention provides a mobile phone SAR reduction system and method. The system includes: an antenna unit for receiving and transmitting radio waves; an induction unit for detecting whether something is approaching the mobile phone by acquiring an inductive signal; a total processing unit , which is used to calculate and determine whether the SAR of the mobile phone exceeds the standard according to the induction signal. If it exceeds the standard, it will send a SAR reduction command. If it does not exceed the standard, it will directly enter the antenna unit to send and receive normally. The unit is connected; the first SAR processing unit is used to calculate and determine the need to reduce power according to the SAR reduction command of the total processing unit and send the first power reduction command, and is connected to the total processing unit; the main chip, which uses receiving the first power reduction command and transmitting the first power reduction command, and connected to the first SAR processing unit; a first power amplifier, which is used for the first power reduction according to the first power reduction of the main chip The command to reduce the power generates a first reduced power, and is connected to the main chip; a second SAR processing unit is configured to calculate and send a second reduced power command according to the first reduced power, and communicate with the first power amplifier. connection; a second power amplifier, configured to reduce power according to the second power command to generate a second reduced power, and enter the antenna unit with the second reduced power for transmission and reception, and communicate with the antenna unit connection. Through the above design, the mobile phone is always in the best signal time and the SAR value of the whole machine does not exceed the standard. The mobile phone has been calculating the scene at this time, and the scene without SAR reduction will be automatically recognized, so that the device can always be in the best signal time. , and the SAR does not exceed the standard and will not cause harm to the human body.
附图说明Description of drawings
图1为本发明手机降SAR系统的模块框图；Fig. 1 is the module block diagram of the mobile phone SAR reduction system of the present invention;
图2为本发明手机降SAR方法的流程框图。FIG. 2 is a flowchart of a method for reducing SAR of a mobile phone according to the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
如附图1-2所示，本发明提供的一种手机降SAR系统，其特征在于，包括：As shown in the accompanying drawings 1-2, a mobile phone SAR reduction system provided by the present invention is characterized in that, it includes:
天线单元，其用于接收和发送无线电波；Antenna units, which are used to receive and transmit radio waves;
感应单元，其用于通过获取感应信号以检测有无东西靠近手机，当人手或脑袋接近手机时，手机的天线功率会对应发生变化；The induction unit is used to detect whether something is approaching the mobile phone by acquiring the induction signal. When the hand or head approaches the mobile phone, the antenna power of the mobile phone will change accordingly;
总处理单元，其用于根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入所述天线单元正常发送、接收，且分别与所述感应单元和所述天线单元连接；The total processing unit is used to calculate and determine whether the SAR of the mobile phone exceeds the standard according to the induction signal. If it exceeds the standard, it will send a SAR reduction command. the antenna unit is connected;
第一SAR处理单元，其用于根据所述总处理单元的降SAR指令计算并判定需要降功率并发送第一降功率指令，且与所述总处理单元连接；a first SAR processing unit, configured to calculate and determine that power reduction is required according to the SAR reduction command of the total processing unit, and send a first power reduction command, and is connected to the total processing unit;
主芯片，其用于接收所述第一降功率指令并将所述第一降功率指令转发送，且与所述第一SAR处理单元连接；a main chip, which is configured to receive the first power reduction command and transmit the first power reduction command, and is connected to the first SAR processing unit;
第一功率放大器，其用于根据所述主芯片的第一降功率指令降低功率生成第一降低后功率，并与所述主芯片连接；a first power amplifier, which is configured to reduce power according to the first power reduction instruction of the main chip to generate a first reduced power, and is connected to the main chip;
第二SAR处理单元，其用于根据第一降低后功率计算并发送第二降功率指令，并与所述第一功率放大器连接；a second SAR processing unit, configured to calculate and send a second power reduction command according to the first reduced power, and be connected to the first power amplifier;
第二功率放大器，其用于根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入所述天线单元进行发送、接收，并与所述天线单元连接。a second power amplifier, configured to reduce power according to the second power command to generate a second reduced power, enter the antenna unit with the second reduced power for transmission and reception, and connect to the antenna unit .
具体的，当手机在使用过程中，感应单元时刻感应检测有无东西靠近手机，比如人手靠近时，此时的天线功率必定会发生变化，总处理单元根据天线功率是否变化来获知是否有东西靠近，总处理单元根据天线功率是否变化计算判断SAR是否超标，若不超标则不作处理；若超标则发送降SAR指令给第一SAR处理单元，第一SAR处理单元获取指令后计算并判定需要降功率并发送第一降功率指令，第一降功率指令包含有需要降低的功率值，然后通过主芯片将第一降功率指令发送至第一功率放大器，第一功率放大器输出第一降低后功率，进行初步功率降低，然后第二SAR处理单元根据第一降低后功率精确计算还需要降低的功率值，生成第二降功率指令，并发送该指令控制第二功率放大器生成第二降低后功率，也即所需的控制在SAR达标时候的值，最后进入天线单元进行发射和接收。从而实现手机一直在计算此时的场景，不用降SAR的场景会自动识别出来，这样能使设备一直处于信号最优的时候，并且SAR不超标，不会对人体造成伤害。Specifically, when the mobile phone is in use, the sensing unit always senses whether there is something approaching the mobile phone, such as when a human hand approaches, the antenna power at this time will definitely change, and the total processing unit will know whether there is something approaching according to whether the antenna power changes. , the total processing unit calculates and judges whether the SAR exceeds the standard according to whether the antenna power changes, and if it does not exceed the standard, no processing is performed; if it exceeds the standard, it sends a SAR reduction command to the first SAR processing unit, and the first SAR processing unit obtains the command and calculates and determines that it is necessary to reduce the power And send the first power reduction command, the first power reduction command contains the power value that needs to be reduced, and then the main chip sends the first power reduction command to the first power amplifier, the first power amplifier outputs the first power after the reduction, and carries out The initial power is reduced, and then the second SAR processing unit accurately calculates the power value that needs to be reduced according to the first reduced power, generates a second power reduction command, and sends the command to control the second power amplifier to generate the second reduced power, that is, The required control is the value when the SAR reaches the standard, and finally enters the antenna unit for transmission and reception. In this way, the mobile phone has been calculating the scene at this time, and the scene without SAR reduction will be automatically recognized, so that the device can always be in the optimal signal time, and the SAR does not exceed the standard, and will not cause harm to the human body.
在一些实施例中，所述感应单元为天线，即以手机的天线作为感应单元。In some embodiments, the sensing unit is an antenna, that is, an antenna of a mobile phone is used as the sensing unit.
在一些实施例中，所述判断手机SAR是否超标采用FCC或CE标准。In some embodiments, the judging whether the SAR of the mobile phone exceeds the standard adopts the FCC or CE standard.
另外的，本发明还提供一种手机降SAR的方法，其特征在于，包括以下步骤：In addition, the present invention also provides a method for reducing the SAR of a mobile phone, which is characterized in that it includes the following steps:
获取感应信号以检测有无东西靠近手机；Obtain sensor signals to detect if something is approaching the phone;
根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入天线单元正常发送、接收；Calculate and determine whether the SAR of the mobile phone exceeds the standard according to the inductive signal, if it exceeds the standard, send a SAR reduction command, and if it does not exceed the standard, directly enter the antenna unit to send and receive normally;
根据所述降SAR指令计算并判定需要降功率并发送第一降功率指令；Calculate and determine that power reduction is required according to the SAR reduction instruction and send the first power reduction instruction;
接收所述第一降功率指令并将所述第一降功率指令转发送；receiving the first power reduction command and forwarding the first power reduction command;
根据所述第一降功率指令降低功率生成第一降低后功率；Reduce power according to the first power reduction command to generate a first reduced power;
根据第一降低后功率计算并发送第二降功率指令；Calculate and send a second power reduction command according to the first reduced power;
根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入天线单元进行发送、接收。The power is reduced according to the second power command to generate a second reduced power, and the second reduced power is used to enter the antenna unit for transmission and reception.
综上，本发明的工作原理如下：To sum up, the working principle of the present invention is as follows:
本发明提供的一种手机降SAR系统及方法，其系统包括：天线单元，其用于接收和发送无线电波；感应单元，其用于通过获取感应信号以检测有无东西靠近手机；总处理单元，其用于根据所述感应信号计算判断手机SAR是否超标，若超标则发送降SAR指令，若不超标则直接进入所述天线单元正常发送、接收，且分别与所述感应单元和所述天线单元连接；第一SAR处理单元，其用于根据所述总处理单元的降SAR指令计算并判定需要降功率并发送第一降功率指令，且与所述总处理单元连接；主芯片，其用于接收所述第一降功率指令并将所述第一降功率指令转发送，且与所述第一SAR处理单元连接；第一功率放大器，其用于根据所述主芯片的第一降功率指令降低功率生成第一降低后功率，并与所述主芯片连接；第二SAR处理单元，其用于根据第一降低后功率计算并发送第二降功率指令，并与所述第一功率放大器连接；第二功率放大器，其用于根据所述第二功率指令降低功率生成第二降低后功率，且以所述第二降低后功率进入所述天线单元进行发送、接收，并与所述天线单元连接。通过上述设计，使手机一直处于信号最好时候同时整机SAR值不超标，手机一直在计算此时的场景，不用降SAR的场景会自动识别出来，这样能使设备一直处于信号最优的时候，并且SAR不超标，不会对人体造成伤害。The present invention provides a mobile phone SAR reduction system and method. The system includes: an antenna unit for receiving and transmitting radio waves; an induction unit for detecting whether something is approaching the mobile phone by acquiring an inductive signal; a total processing unit , which is used to calculate and determine whether the SAR of the mobile phone exceeds the standard according to the induction signal. If it exceeds the standard, it will send a SAR reduction command. If it does not exceed the standard, it will directly enter the antenna unit to send and receive normally. The unit is connected; the first SAR processing unit is used to calculate and determine the need to reduce power according to the SAR reduction command of the total processing unit and send the first power reduction command, and is connected to the total processing unit; the main chip, which uses receiving the first power reduction command and transmitting the first power reduction command, and connected to the first SAR processing unit; a first power amplifier, which is used for the first power reduction according to the first power reduction of the main chip The command to reduce the power generates a first reduced power, and is connected to the main chip; a second SAR processing unit is configured to calculate and send a second reduced power command according to the first reduced power, and communicate with the first power amplifier. connection; a second power amplifier, configured to reduce power according to the second power command to generate a second reduced power, and enter the antenna unit with the second reduced power for transmission and reception, and communicate with the antenna unit connection. Through the above design, the mobile phone is always in the best signal time and the SAR value of the whole machine does not exceed the standard. The mobile phone has been calculating the scene at this time, and the scene without SAR reduction will be automatically recognized, so that the device can always be in the best signal time. , and the SAR does not exceed the standard and will not cause harm to the human body.
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions of the present invention and the inventive concept thereof, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention.
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