CN115441890A - Method and device for controlling electromagnetic wave absorption ratio - Google Patents

Method and device for controlling electromagnetic wave absorption ratio Download PDF

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CN115441890A
CN115441890A CN202211052395.0A CN202211052395A CN115441890A CN 115441890 A CN115441890 A CN 115441890A CN 202211052395 A CN202211052395 A CN 202211052395A CN 115441890 A CN115441890 A CN 115441890A
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distance
dielectric constant
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capacitance
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秦源
付堉皓
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2617—Measuring dielectric properties, e.g. constants
    • G01R27/2623—Measuring-systems or electronic circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The application discloses a method and a device for controlling an electromagnetic wave absorption ratio, and belongs to the technical field of electronic equipment. The method for controlling the electromagnetic wave absorption ratio comprises the following steps: acquiring the distance between an external object detected by a distance sensor of the electronic equipment and the capacitance detected by the SAR sensor; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to that of the human body, the transmission power of the electronic device is reduced to reduce the electromagnetic wave absorption ratio.

Description

Method and device for controlling electromagnetic wave absorption ratio
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a method and a device for controlling an electromagnetic wave absorption ratio.
Background
The larger the transmission power of electronic equipment such as a mobile phone or a wireless product is, the larger the electromagnetic wave Absorption ratio or Specific Absorption Rate (SAR) is, the larger the SAR is, the larger the influence on a human body is, and otherwise, the smaller the influence is.
In the related art, in order to reduce the influence of SAR on the human body, the capacitance detected by the SAR sensor is usually compared with a preset capacitance threshold value to control SAR. Specifically, when the capacitance detected by the SAR sensor is lower than a preset capacitance threshold value, the transmission power of the electronic equipment is reduced to reduce SAR.
However, the SAR is controlled by the capacitance detected by the SAR sensor and the threshold value of the capacitance, which cannot ensure that the object close to the electronic device is a human body, and thus the SAR is reduced in a scene where the object close to the electronic device is not a human body, and the SAR control is inaccurate.
Disclosure of Invention
The embodiment of the application aims to provide a method and a device for controlling an electromagnetic wave absorption ratio, which can solve the problem of inaccurate SAR control.
In a first aspect, an embodiment of the present application provides a method for controlling an electromagnetic wave absorption ratio, including:
acquiring the distance between an external object detected by a distance sensor of the electronic equipment and the capacitance detected by the SAR sensor;
determining a target dielectric constant of the external object according to the distance between the external object and the electronic equipment detected by the distance sensor and the capacitance detected by the SAR sensor;
in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR.
In a second aspect, an embodiment of the present application provides a device for controlling an electromagnetic wave absorption ratio, including:
the acquisition module is used for acquiring the distance between an external object detected by a distance sensor of the electronic equipment and the capacitance detected by the SAR sensor;
the determining module is used for determining the target dielectric constant of an external object according to the distance between the object and the electronic equipment detected by the distance sensor and the capacitance detected by the SAR sensor;
and the reducing module is used for reducing the SAR of the electronic equipment under the condition that the target dielectric constant is greater than or equal to the dielectric constant of the human body.
In a third aspect, embodiments of the present application provide an electronic device, comprising a distance sensor, a SAR sensor, a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium on which a program or instructions are stored, which when executed by a processor, implement the steps of the method according to the first aspect.
In a fifth aspect, embodiments of the present application provide a chip, which includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the steps of the method according to the first aspect.
In a sixth aspect, embodiments of the present application provide a computer program product, stored on a storage medium, for execution by at least one processor to implement the method according to the first aspect.
In the embodiment of the application, the distance between an external object and the electronic equipment, which is detected by a distance sensor of the electronic equipment, and the capacitance detected by an SAR sensor are obtained; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR. Therefore, when the target dielectric constant is larger than or equal to the dielectric constant of the human body, the external object close to the electronic equipment is the human body, and then the SAR is reduced, the situation that the SAR is reduced under the scene that the object close to the electronic equipment is not the human body can be reduced, and the accuracy of SAR control can be improved.
Drawings
Fig. 1 is a schematic flowchart of a method for controlling an electromagnetic wave absorption ratio provided in an embodiment of the present application;
FIG. 2 is a first diagram illustrating a relationship between a distance and a reduction amount of a transmission power according to an embodiment of the present disclosure;
FIG. 3 is a second diagram illustrating a relationship between a distance and a reduction in transmission power according to an embodiment of the present disclosure;
fig. 4 is a first schematic diagram of a corresponding relationship between a distance and a transmission power according to an embodiment of the present application;
fig. 5 is a second schematic diagram of a corresponding relationship between a distance and a transmission power provided in an embodiment of the present application;
FIG. 6 is a schematic coordinate system diagram of an electronic device provided in an embodiment of the present application;
fig. 7 is a schematic layout diagram of a SAR sensor provided on an electronic device according to an embodiment of the present application;
FIG. 8 is a schematic layout diagram of sensors disposed on a back side of an electronic device according to an embodiment of the present disclosure;
FIG. 9 is a schematic layout diagram of a sensor disposed on a right side of an electronic device according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a process for reducing the transmission power of an electronic device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a control device for electromagnetic wave absorption ratio according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;
fig. 13 is a hardware configuration diagram of an electronic device implementing an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The method and apparatus for controlling the electromagnetic wave absorption ratio provided by the embodiments of the present application will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic flowchart of a method for controlling an electromagnetic wave absorption ratio according to an embodiment of the present application. As shown in fig. 1, the method for controlling the electromagnetic wave absorption ratio may include:
s101: acquiring the distance between an external object detected by a distance sensor of the electronic equipment and the capacitance detected by the SAR sensor;
s102: determining a target dielectric constant of an external object according to the distance between the object and the electronic equipment detected by the distance sensor and the capacitance detected by the SAR sensor;
s103: in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR.
Specific implementations of the above steps will be described in detail below.
In the embodiment of the application, the distance between an external object and the electronic equipment detected by a distance sensor of the electronic equipment and the capacitance detected by an SAR sensor are acquired; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR. Therefore, when the target dielectric constant is larger than or equal to the dielectric constant of the human body, the external object close to the electronic equipment is the human body, and then the SAR is reduced, so that the situation that the SAR is reduced under the scene that the object close to the electronic equipment is not the human body can be reduced, and the accuracy of SAR control can be improved.
In some possible implementations of embodiments of the present application, the distance sensor in embodiments of the present application includes, but is not limited to: inductive proximity sensors, photoelectric sensors, acoustic wave sensors, and the like.
In some possible implementations of embodiments of the present application, the capacitance detected by the SAR sensor is primarily affected by the distance of the object detected by the distance sensor from the electronic device, the dielectric constant of the object, and the size of the object.
The relationship among the capacitance detected by the SAR sensor, the distance of the external object detected by the distance sensor from the electronic device, the dielectric constant of the external object, and the size of the external object is as shown in the following formula (1).
C＝f(d,ε,h,x,y) (1)
In the formula (1), C is the capacitance detected by the SAR sensor, d is the distance between the external object detected by the distance sensor and the electronic device, ∈ is the dielectric constant of the external object, and h, X, and Y are the dimensions of the external object in the Z direction, the X direction, and the Y direction of the electronic device, respectively.
In some possible implementations of embodiments of the present application, in some cases, the influence of the size of the external object on the capacitance detected by the SAR sensor may be ignored, for example, the size of the external object in the Z direction, the X direction, and the Y direction of the electronic device is greater than 20 millimeters. The above formula (1) can be simplified as the following formula (2).
C＝f(d,ε) (2)
In some possible implementations of the embodiment of the present application, in S102, after obtaining the distance d between the external object detected by the distance sensor and the electronic device and the capacitance C detected by the SAR sensor, the dielectric constant ∈ of the external object, that is, the target dielectric constant, may be calculated by using the above formula (2). When the target dielectric constant is larger than or equal to the dielectric constant of the human body according to the formula (2), it indicates that the external object close to the electronic device is the human body, and further the transmission power of the electronic device is reduced.
In some possible implementations of the embodiments of the present application, equation (2) above is equivalent using a parallel plate capacitor model, which can be obtained:
Figure BDA0003824217630000051
wherein, in the formula (3), S is the area of the SAR sensor capacitance detection patch (patch), d 0 For capacitive detection of the distance of the patch to the motherboard, ε eff Is the equivalent dielectric constant, S and d, converted from all the media near the capacitance detection patch 0 Is a fixed value.
From the formula (3), ε eff Positively correlated with epsilon, and negatively correlated with d. Epsilon eff The relation to epsilon is strongly related to the composition and spatial arrangement of the surrounding medium, epsilon eff The relationship to ε may be determined by simulation or test fitting.
After the capacitance C detected by the SAR sensor is obtained, the equivalent dielectric constant epsilon can be obtained by using the formula (3) eff And then epsilon from simulation or test fitting eff With respect to ε, ε can be determined.
In some possible implementations of the embodiment of the present application, S102 may include: and under the condition that the distance between the external object detected by the distance sensor and the electronic equipment is smaller than or equal to a distance threshold value, determining a target dielectric constant according to the distance and the capacitance detected by the SAR sensor.
In the embodiment of the application, when the distance between the external object and the electronic device detected by the distance sensor is greater than the distance threshold, it indicates that the external object is farther from the electronic device, and at this time, the transmission power of the electronic device does not need to be reduced, and thus the target dielectric constant does not need to be determined. The transmission power of the electronic equipment is reduced only when the distance between the object and the electronic equipment detected by the distance sensor is smaller than or equal to the distance threshold, and the accuracy of transmission power control of the electronic equipment can be improved.
In some possible implementations of the embodiment of the present application, S103 may include: determining a target reduction amount corresponding to the distance between the external object and the electronic equipment, which is detected by the distance sensor, according to the corresponding relation between the distance and the transmission power reduction amount; and reducing the emission power of the electronic equipment by the target reduction amount.
In some possible implementations of the embodiments of the present application, the smaller the distance between the external object and the electronic device detected by the distance sensor is, the larger the reduction amount of the transmission power of the electronic device may be. The corresponding relationship between the distance and the reduction limit of the transmitting power is shown in fig. 2. According to the corresponding relationship shown in fig. 2, the emission power reduction amount corresponding to the distance between the external object detected by the distance sensor and the electronic device can be determined, and then the emission power of the electronic device is reduced by the emission power reduction amount corresponding to the distance between the external object detected by the distance sensor and the electronic device.
In some possible implementations of the embodiment of the present application, the distance may be divided into a plurality of distance intervals in advance, and each distance interval corresponds to one transmit power reduction amount. The corresponding relationship between the distance and the transmission power reduction amount is shown in fig. 3. In fig. 3, the distance is divided into 4 distance sections, the 4 distance sections are divided into 0-dk, dk-dm, dm-dn and dn-d0, the transmission power reduction limit corresponding to the distance section 0-dk is d, the transmission power reduction limit corresponding to the distance section dk-dm is c, the transmission power reduction limit corresponding to the distance section dm-dn is b, the transmission power reduction limit corresponding to the distance section dn-d0 is a, d0 is a distance threshold, d0> dn > dm > dk >0, d > c > b >0.
And when the distance between the external object and the electronic equipment detected by the distance sensor is within the distance interval dk-dm, determining that the transmitting power reduction amount is c, and further reducing the transmitting power by c.
In some possible implementations of the embodiment of the present application, S103 may include: determining target transmitting power corresponding to the distance between the external object detected by the distance sensor and the electronic equipment according to the corresponding relation between the distance and the transmitting power; and reducing the emission power of the electronic equipment to the target emission power.
In some possible implementations of embodiments of the present application, the smaller the distance between the external object and the electronic device detected by the distance sensor, the smaller the transmission power of the electronic device. The correspondence of distance to transmit power is shown in fig. 4. According to the correspondence shown in fig. 4, the transmission power corresponding to the distance between the external object detected by the distance sensor and the electronic device can be determined, and then the transmission power of the electronic device is reduced to the transmission power corresponding to the distance between the external object detected by the distance sensor and the electronic device.
In some possible implementations of the embodiments of the present application, the distance may be divided into a plurality of distance intervals in advance, and each distance interval corresponds to one transmission power. The correspondence of distance to transmit power is shown in fig. 5. In fig. 5, the distance is divided into 4 distance sections, the 4 distance sections are divided into 0-dk, dk-dm, dm-dn and dn-d0, the transmission power corresponding to the distance section 0-dk is a, the transmission power corresponding to the distance section dk-dm is b, the transmission power corresponding to the distance section dm-dn is c, the transmission power corresponding to the distance section dn-d0 is d, d0 is a distance threshold, d0> dn > dm > dk >0, d > c > < b > < 0.
And when the distance between the external object and the electronic equipment, which is detected by the distance sensor, is in a distance interval dk-dm, determining that the transmission power is b, and further reducing the transmission power of the electronic equipment to b.
In some possible implementations of embodiments of the present application, the detection directions of the distance sensor and the SAR sensor are the same.
Exemplarily, the SAR sensor is able to detect the back and the right side of the electronic device, then the distance sensor must also detect the back and the right side of the electronic device.
In the embodiment of the application, the detection directions of the distance sensor and the SAR sensor are the same, so that the accuracy of the transmission power control of the electronic equipment can be ensured.
In some possible implementations of embodiments of the present application, the distance sensor includes at least two distance sensors, and the detection directions of the at least two distance sensors are different.
Illustratively, the distance sensor includes two distance sensors, one of which is disposed on the back side of the electronic device and detects the back side direction of the electronic device, and the other of which is disposed on the right side of the electronic device and detects the right side direction of the electronic device. The SAR sensor detects a back side direction and a right side direction of the electronic device.
Still further illustratively, the distance sensors include six distance sensors, three of which are disposed on a back surface of the electronic device to detect a back direction of the electronic device, and the other three of which are disposed on a right side surface of the electronic device to detect a right direction of the electronic device. The SAR sensor detects a back side direction and a right side direction of the electronic device. As shown in fig. 6 to 9, the six distance sensors are distance sensors a-F, respectively, the distance sensors a-C are disposed on the back side of the electronic device, and the distance sensors D-F are disposed on the right side of the electronic device.
In some possible implementations of the embodiments of the present application, S102 may include: determining a dielectric constant corresponding to a first detection direction according to a distance and a capacitance corresponding to the first detection direction, wherein the first detection direction is any one of different detection directions; the maximum value of the dielectric constants corresponding to the different detection directions is set as a target dielectric constant.
Exemplarily, the cases shown in fig. 6 to 9 described above are taken as examples.
For the back side direction of the electronic device, the distance sensors A-C detect the distances d1, d2 and d3 respectively, and the distance d between the object and the electronic device is determined according to the distances d1, d2 and d3 Back of body . When d is Back of body Less than or equal to the distance threshold d Back door limit value According to the capacitances C and d detected by the SAR sensor Back of body The dielectric constant ε was calculated by using the above formula (2) Back of body 。
Determining the distance d between the object and the electronic equipment according to d1, d2 and d3 Back of body When d, the average, median, maximum or minimum of d1, d2 and d3 may be determined as d Back of body 。
For the right direction of the electronic equipment, the distance sensors D-F detect the distances D4, D5 and D6 respectively, and the distance D between the object and the electronic equipment is determined according to the distances D4, D5 and D6 Right side . When d is Right side Less than or equal to the distance threshold d Right threshold value According to the capacitances C and d detected by the SAR sensor Right side The dielectric constant ε was calculated by using the above formula (2) Right side 。
Determining the distance d between the object and the electronic equipment according to d4, d5 and d6 Right side When d, the average, median, maximum or minimum of d1, d2 and d3 may be determined as d Right side 。
Then, take ε Back of body And ε Right side Maximum value of (2) ∈ r The maximum value epsilon r As the target dielectric constant.
When the target dielectric constant is greater than the dielectric constant of the human body, the emission power of the electronic device is reduced.
The above process is shown in fig. 10, and fig. 10 is a schematic diagram of a process for reducing the transmission power of the electronic device according to an embodiment of the present application.
In the embodiment of the application, the maximum value of the dielectric constants corresponding to different detection directions is used as the target dielectric constant, so that the accuracy of SAR control can be improved.
In the method for controlling the electromagnetic wave absorption ratio provided in the embodiments of the present application, the execution main body may be a control device of the electromagnetic wave absorption ratio. In the embodiments of the present application, a method for controlling an electromagnetic wave absorption ratio by an electromagnetic wave absorption ratio control device is taken as an example, and the electromagnetic wave absorption ratio control device provided in the embodiments of the present application is described.
Fig. 11 is a schematic structural diagram of a control device for electromagnetic wave absorption ratio according to an embodiment of the present application. As shown in fig. 11, the apparatus 1100 for controlling an electromagnetic wave absorption ratio may include:
an obtaining module 1101, configured to obtain a distance between an external object detected by a distance sensor of an electronic device and the electronic device and a capacitance detected by an SAR sensor;
a determining module 1102, configured to determine a target dielectric constant of an external object according to a distance between the external object and the electronic device detected by the distance sensor and a capacitance detected by the SAR sensor;
the reducing module 1103 is configured to reduce the transmission power of the electronic device to reduce SAR when the target dielectric constant is greater than or equal to the dielectric constant of the human body.
In the embodiment of the application, the distance between an external object and the electronic equipment detected by a distance sensor of the electronic equipment and the capacitance detected by an SAR sensor are acquired; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR. Therefore, when the target dielectric constant is larger than or equal to the dielectric constant of the human body, the external object close to the electronic equipment is the human body, and then the SAR is reduced, the situation that the SAR is reduced under the scene that the object close to the electronic equipment is not the human body can be reduced, and the accuracy of SAR control can be improved.
In some possible implementations of the embodiment of the present application, the determining module 1102 may be specifically configured to:
and under the condition that the distance between the external object detected by the distance sensor and the electronic equipment is smaller than or equal to a distance threshold value, determining the target dielectric constant according to the distance between the external object detected by the distance sensor and the electronic equipment and the capacitance detected by the SAR sensor.
In the embodiment of the application, when the distance between the external object and the electronic device, which is detected by the distance sensor, is greater than the distance threshold, it indicates that the external object is farther from the electronic device, and at this time, the SAR does not need to be reduced, and thus the target dielectric constant does not need to be determined. Only when the distance between the external object detected by the distance sensor and the electronic device is smaller than or equal to the distance threshold, the SAR is reduced, and the accuracy of SAR control can be improved.
In some possible implementations of the embodiments of the present application, the reducing module 1103 may include:
the first determining submodule is used for determining a target reduction limit corresponding to the distance between the external object and the electronic equipment, which is detected by the distance sensor, according to the corresponding relation between the distance and the emission power reduction limit;
and the first reduction submodule is used for reducing the transmitting power of the electronic equipment by the target reduction amount.
In some possible implementations of the embodiments of the present application, the reducing module 1103 may include:
the first determining submodule is used for determining target transmitting power corresponding to the distance between the external object detected by the distance sensor and the electronic equipment according to the corresponding relation between the distance and the transmitting power;
and the second reduction submodule is used for reducing the transmission power of the electronic equipment to the target transmission power.
In some possible implementations of embodiments of the present application, the detection directions of the distance sensor and the SAR sensor are the same.
In some possible implementations of embodiments of the present application, the distance sensor includes at least two distance sensors, detection directions of the at least two distance sensors being different;
the determining module 1102 may include:
the second determining submodule is used for determining the dielectric constant corresponding to the first detection direction according to the distance and the capacitance corresponding to the first detection direction, wherein the first detection direction is any one of different detection directions;
and the third determining submodule is used for taking the maximum value in the dielectric constants corresponding to different detection directions as the target dielectric constant.
In the embodiment of the application, the maximum value of the dielectric constants corresponding to different detection directions is used as the target dielectric constant, so that the accuracy of SAR control can be improved.
The control device of the electromagnetic wave absorption ratio in the embodiment of the present application may be an electronic device, or may be a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be a device other than a terminal. The electronic Device may be, for example, a Mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic Device, a Mobile Internet Device (MID), an Augmented Reality (AR)/Virtual Reality (VR) Device, a robot, a wearable Device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and may also be a server, a Network Attached Storage (Network Attached Storage, NAS), a personal computer (NAS), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not limited in particular.
The control device of the electromagnetic wave absorption ratio in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system (Android), an iOS operating system, or other possible operating systems, which is not specifically limited in the embodiments of the present application.
The control device for the electromagnetic wave absorption ratio provided in the embodiment of the present application can implement each process in the control method embodiment for the electromagnetic wave absorption ratio in fig. 1 to fig. 10, and is not described herein again to avoid repetition.
Optionally, as shown in fig. 12, an electronic device 1200 is further provided in this embodiment of the present application, and includes a processor 1201, a memory 1202, a distance sensor 1203, and an SAR sensor 1204, where the memory 1202 stores a program or an instruction that can be executed on the processor 1201, and when the program or the instruction is executed by the processor 1201, the steps of the embodiment of the method for controlling an electromagnetic wave absorption ratio are implemented, and the same technical effects can be achieved, and are not described herein again to avoid repetition.
In some possible implementations of embodiments of the present Application, the processor 1201 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of embodiments of the present Application.
In some possible implementations of embodiments of the present application, the Memory 1202 may include Read-Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash Memory devices, electrical, optical, or other physical/tangible Memory storage devices. Thus, in general, the memory 1202 includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method of controlling electromagnetic wave absorption ratio in accordance with embodiments of the present application.
Fig. 13 is a hardware configuration diagram of an electronic device implementing an embodiment of the present application.
The electronic device 1300 includes, but is not limited to: a radio frequency unit 1301, a network module 1302, an audio output unit 1303, an input unit 1304, a sensor 1305, a display unit 1306, a user input unit 1307, an interface unit 1308, a memory 1309, a processor 1310, and the like.
Those skilled in the art will appreciate that the electronic device 1300 may further comprise a power supply (e.g., a battery) for supplying power to the various components, and the power supply may be logically connected to the processor 1310 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. The electronic device structure shown in fig. 13 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
Wherein the processor 1310 is configured to: acquiring the distance between an external object detected by a distance sensor of the electronic device 1300 and the capacitance detected by the SAR sensor; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR.
In the embodiment of the application, the distance between an external object and the electronic equipment detected by a distance sensor of the electronic equipment and the capacitance detected by an SAR sensor are acquired; determining a target dielectric constant of the external object according to the distance and the capacitance; in the case where the target dielectric constant is greater than or equal to the dielectric constant of the human body, the transmission power of the electronic device is reduced to reduce SAR. Therefore, when the target dielectric constant is larger than or equal to the dielectric constant of the human body, the external object close to the electronic equipment is the human body, and then the SAR is reduced, the situation that the SAR is reduced under the scene that the object close to the electronic equipment is not the human body can be reduced, and the accuracy of SAR control can be improved.
In some possible implementations of embodiments of the present application, the processor 1310 may be specifically configured to:
in a case where the distance between the external object detected by the distance sensor and the electronic device 1300 is less than or equal to the distance threshold value, the target dielectric constant is determined according to the distance between the external object detected by the distance sensor and the electronic device 1300 and the capacitance detected by the SAR sensor.
In the embodiment of the application, when the distance between the external object and the electronic device, which is detected by the distance sensor, is greater than the distance threshold, it indicates that the external object is farther from the electronic device, and at this time, the SAR does not need to be reduced, and thus the target dielectric constant does not need to be determined. Only when the distance between the external object detected by the distance sensor and the electronic device is smaller than or equal to the distance threshold, the SAR is reduced, and the accuracy of SAR control can be improved.
In some possible implementations of embodiments of the present application, the processor 1310 may be specifically configured to:
determining a target reduction limit corresponding to the distance between the external object detected by the distance sensor and the electronic device 1300 according to the corresponding relation between the distance and the emission power reduction limit; the transmission power of the electronic device 1300 is reduced by the target reduction amount.
In some possible implementations of embodiments of the present application, the processor 1310 may be specifically configured to:
determining target transmitting power corresponding to the distance between the external object detected by the distance sensor and the electronic device 1300 according to the corresponding relation between the distance and the transmitting power; the transmit power of the electronic device 1300 is reduced to a target transmit power.
In some possible implementations of embodiments of the present application, the detection directions of the distance sensor and the SAR sensor are the same.
In some possible implementations of embodiments of the present application, the distance sensor includes at least two distance sensors, detection directions of the at least two distance sensors being different;
processor 1310 may be specifically configured to:
determining a dielectric constant corresponding to a first detection direction according to a distance and a capacitance corresponding to the first detection direction, wherein the first detection direction is any one of different detection directions;
the maximum value of the dielectric constants corresponding to the different detection directions is set as a target dielectric constant.
In the embodiment of the application, the maximum value of the dielectric constants corresponding to different detection directions is used as the target dielectric constant, so that the accuracy of SAR control can be improved.
It should be understood that in the embodiment of the present application, the input Unit 1304 may include a Graphics Processing Unit (GPU) 13041 and a microphone 13042, and the Graphics processor 13041 processes image data of still pictures or videos obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1306 may include a display panel 13061, and the display panel 13061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1307 includes a touch panel 13071 and at least one of other input devices 13072. Touch panel 13071, also known as a touch screen. The touch panel 13071 may include two parts, a touch detection device and a touch controller. Other input devices 13072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
The memory 1309 may be used to store software programs as well as various data. The memory 1309 may mainly include a first storage area storing a program or an instruction and a second storage area storing data, wherein the first storage area may store an operating system, an application program or an instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, memory 1309 can comprise volatile memory or nonvolatile memory, or memory 1309 can comprise both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM), a Static Random Access Memory (Static RAM, SRAM), a Dynamic Random Access Memory (Dynamic RAM, DRAM), a Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), a Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, ddr SDRAM), an Enhanced Synchronous SDRAM (ESDRAM), a Synchronous Link DRAM (SLDRAM), and a Direct Memory bus RAM (DRRAM). Memory 1309 in the embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.
Processor 1310 may include one or more processing units; optionally, the processor 1310 integrates an application processor, which mainly handles operations related to the operating system, user interface, application programs, etc., and a modem processor, which mainly handles wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1310.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned method for controlling an electromagnetic wave absorption ratio, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, and examples of the computer readable storage medium include non-transitory computer readable storage media such as ROM, RAM, magnetic or optical disks, and the like.
The embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the above-mentioned embodiment of the method for controlling an electromagnetic wave absorption ratio, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
Embodiments of the present application provide a computer program product, which is stored in a storage medium and executed by at least one processor to implement the processes of the above embodiments of the method for controlling an electromagnetic wave absorption ratio, and achieve the same technical effects, and therefore, in order to avoid repetition, the descriptions of the processes are omitted here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A method for controlling an electromagnetic wave absorption ratio, the method comprising:
acquiring the distance between an external object detected by a distance sensor of electronic equipment and the capacitance detected by an SAR sensor;
determining a target dielectric constant of the external object according to the distance and the capacitance;
and reducing the emission power of the electronic equipment to reduce the electromagnetic wave absorption ratio under the condition that the target dielectric constant is greater than or equal to the dielectric constant of the human body.
2. The method of claim 1, wherein determining the target dielectric constant of the external object based on the distance and the capacitance comprises:
and determining the target dielectric constant according to the distance and the capacitance when the distance is less than or equal to a distance threshold value.
3. The method of claim 1, wherein the reducing the transmission power of the electronic device comprises:
determining a target reduction limit corresponding to the distance according to the corresponding relation between the distance and the emission power reduction limit;
reducing the transmit power by the target reduction amount.
4. The method of claim 1, wherein the reducing the transmission power of the electronic device comprises:
determining target transmitting power corresponding to the distance according to the corresponding relation between the distance and the transmitting power;
reducing the transmit power to the target transmit power.
5. The method of claim 1, wherein the distance sensor and the SAR sensor have the same detection direction.
6. The method of claim 5, wherein the distance sensor comprises at least two distance sensors, the at least two distance sensors having different detection directions;
determining a target dielectric constant of the external object based on the distance and the capacitance, comprising:
determining a dielectric constant corresponding to a first detection direction according to the distance and the capacitance corresponding to the first detection direction, wherein the first detection direction is any one of different detection directions;
and taking the maximum value of the dielectric constants corresponding to different detection directions as the target dielectric constant.
7. An apparatus for controlling an electromagnetic wave absorption ratio, the apparatus comprising:
the acquisition module is used for acquiring the distance between an external object detected by a distance sensor of the electronic equipment and the capacitance detected by the SAR sensor;
a determination module for determining a target dielectric constant of the external object according to the distance and the capacitance;
and the reducing module is used for reducing the transmitting power of the electronic equipment under the condition that the target dielectric constant is greater than or equal to the dielectric constant of the human body so as to reduce the electromagnetic wave absorption ratio.
8. The apparatus of claim 7, wherein the determining module is specifically configured to:
and determining the target dielectric constant according to the distance and the capacitance when the distance is less than or equal to a distance threshold value.
9. The apparatus of claim 7, wherein the detection direction of the distance sensor and the SAR sensor is the same.
10. The apparatus of claim 9, wherein the distance sensor comprises at least two distance sensors, the at least two distance sensors having different detection directions;
the determining module includes:
the second determining submodule is used for determining a dielectric constant corresponding to a first detection direction according to the distance and the capacitance corresponding to the first detection direction, wherein the first detection direction is any one of different detection directions;
and the third determining submodule is used for taking the maximum value of the dielectric constants corresponding to different detection directions as the target dielectric constant.
CN202211052395.0A 2022-08-31 2022-08-31 Method and device for controlling electromagnetic wave absorption ratio Pending CN115441890A (en)

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