CN115412116A - Method and device for adjusting SAR value, electronic equipment and computer-readable storage medium - Google Patents
Method and device for adjusting SAR value, electronic equipment and computer-readable storage medium Download PDFInfo
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- CN115412116A CN115412116A CN202110587137.1A CN202110587137A CN115412116A CN 115412116 A CN115412116 A CN 115412116A CN 202110587137 A CN202110587137 A CN 202110587137A CN 115412116 A CN115412116 A CN 115412116A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
Abstract
The disclosure relates to a method and a device for adjusting SAR value, an electronic device and a computer readable storage medium. The method comprises the following steps: controlling an antenna array of the electronic equipment to transmit pulse sequences to a plurality of specified directions and acquiring echo sequences corresponding to the pulse sequences; acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence; and adjusting the SAR value of the electronic equipment according to the target distance. In this embodiment, the antenna array of the electronic device may be directly multiplexed to obtain the target distance between the antenna array and the target object and the SAR value may be adjusted by using the target distance, and an SAR sensor or a distance sensor does not need to be arranged in the electronic device, so that the occupation of the electronic device is reduced, and the cost of the electronic device is reduced.
Description
Technical Field
The present disclosure relates to the field of control technologies, and in particular, to a method and an apparatus for adjusting an SAR value, an electronic device, and a computer-readable storage medium.
Background
When the power exceeds a certain intensity in the process of transmitting radio waves to a base station by electronic equipment such as a mobile phone, the health of a human body can be affected. Therefore, when a human body approaches the electronic device, SAR (specific absorption Rate) reduction processing is required to reduce damage to the human body during transmission of radio waves by the antenna of the electronic device.
Currently, in a 5G frequency band (such as Sub-6G band), an electronic device obtains a distance between a human body and the electronic device by using an SAR sensor or a distance sensor. Taking the SAR sensor as an example, the SAR sensor needs to have enough projection area in each direction to effectively detect each direction, which results in the SAR sensor occupying a limited space of the electronic device and finally increasing the cost of the electronic device.
Disclosure of Invention
The present disclosure provides a method and apparatus for adjusting an SAR value, an electronic device, and a computer-readable storage medium, to solve the deficiencies of the related art.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for adjusting a SAR value, applied to an electronic device including an antenna array, the method including:
controlling an antenna array of the electronic equipment to transmit a pulse sequence to a plurality of specified directions and acquiring an echo sequence corresponding to the pulse sequence;
acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence;
and adjusting the SAR value of the electronic equipment according to the target distance.
Optionally, acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence includes:
obtaining a feature value of each pulse in both the echo sequence and the pulse sequence;
aligning the echo sequence and the pulse sequence based on a characteristic value;
acquiring a time difference value between the echo sequence and the pulse sequence;
calculating the distance between the antenna array and a target object according to the time difference and the light speed;
and determining a target distance between the antenna array and a target object according to the distance.
Optionally, the characteristic value comprises at least one of: the content of the pulse, the duty cycle of the pulse and the intensity of the pulse.
Optionally, aligning the echo sequence and the pulse sequence based on the feature values comprises:
acquiring pulses in the echo sequence which are matched with eigenvalues of all pulses in the pulse sequence;
and adjusting the sequence of each pulse in the echo sequence according to the transmitting sequence of each pulse in the pulse sequence to obtain the aligned echo sequence and the pulse sequence.
Optionally, acquiring a time difference between the echo sequence and the pulse sequence includes:
sequentially acquiring the time difference of each pair of pulses in the echo sequence and the pulse sequence;
and taking the average value of the time differences of all the pulses as the time difference value.
Optionally, determining a target distance between the antenna array and a target object according to the distance includes:
obtaining a minimum distance of the plurality of distances; each distance in the plurality of distances corresponds to the plurality of designated directions one to one;
and taking the minimum distance as a target distance between the antenna array and a target object.
Optionally, determining a target distance between the antenna array and a target object according to the distance includes:
and when a first preset number of distances are continuously smaller than or equal to a preset distance threshold, taking the minimum distance in the first preset number of distances as the target distance between the antenna array and the target object.
Optionally, controlling an antenna array of the electronic device to transmit a pulse sequence to a plurality of specified directions includes:
sequentially acquiring the beam directions of the beam direction sequence; the beam direction sequence comprises a plurality of beam directions, and the directions of any two beam directions are different;
based on the corresponding relation between the beam identification code of the beam and the beam direction, the beam identification code of the antenna array is modified into the beam identification code corresponding to the beam direction in sequence;
and controlling the antenna array to transmit the pulse sequence in each beam direction.
Optionally, adjusting the SAR value of the electronic device according to the target distance includes:
when the target distance is smaller than or equal to a first distance threshold value, adjusting the radiation power of the antenna array to a first radiation power so as to reduce the SAR value of the electronic equipment;
when the target distance is larger than a first distance threshold and not larger than a second distance threshold, adjusting the radiation power of the antenna array to a second radiation power so as to reduce the SAR value of the electronic equipment;
when the target distance is greater than a first distance threshold, maintaining the radiation power of the antenna array to maintain the SAR value of the electronic device.
According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for adjusting a SAR value, applied to an electronic device including an antenna array, the apparatus including:
the echo sequence acquisition module is used for controlling the antenna array of the electronic equipment to transmit pulse sequences to a plurality of specified directions and acquiring echo sequences corresponding to the pulse sequences;
the target distance acquisition module is used for acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence;
and the SAR value adjusting module is used for adjusting the SAR value of the electronic equipment according to the target distance.
Optionally, the target distance obtaining module includes:
a characteristic value obtaining submodule for obtaining a characteristic value of each pulse in both the echo sequence and the pulse sequence;
the sequence alignment sub-module is used for aligning the echo sequence and the pulse sequence based on the characteristic value;
the difference value acquisition submodule is used for acquiring the time difference value of the echo sequence and the pulse sequence;
the distance calculation submodule is used for calculating the distance between the antenna array and a target object according to the time difference and the light speed;
and the distance determining submodule is used for determining the target distance between the antenna array and the target object according to the distance.
Optionally, the characteristic value comprises at least one of: the content of the pulse, the duty cycle of the pulse and the intensity of the pulse.
Optionally, aligning the echo sequence and the pulse sequence based on the feature values comprises:
acquiring pulses in the echo sequence which are matched with eigenvalues of all pulses in the pulse sequence;
and adjusting the sequence of each pulse in the echo sequence according to the transmitting sequence of each pulse in the pulse sequence to obtain the aligned echo sequence and the pulse sequence.
Optionally, the difference obtaining sub-module includes:
a time difference acquiring unit, configured to sequentially acquire a time difference between each pair of pulses in the echo sequence and the pulse sequence;
and the difference value acquisition unit is used for taking the average value of the time differences of all the pulses as the time difference value.
Optionally, the distance determining sub-module includes:
a minimum distance acquisition unit configured to acquire a minimum distance among the plurality of distances; each distance in the plurality of distances corresponds to the plurality of designated directions one to one;
and the target distance acquisition unit is used for taking the minimum distance as the target distance between the antenna array and a target object.
Optionally, the distance determining sub-module includes:
and the target distance acquisition unit is used for taking the minimum distance in the first preset number of distances as the target distance between the antenna array and a target object when the first preset number of distances are smaller than or equal to a preset distance threshold value continuously.
Optionally, the echo sequence acquiring module includes:
the direction acquisition submodule is used for sequentially acquiring the beam directions of the beam direction sequence; the beam direction sequence comprises a plurality of beam directions, and the directions of any two beam directions are different;
the identification code acquisition sub-module is used for sequentially modifying the beam identification codes of the antenna array into the beam identification codes corresponding to the beam directions based on the corresponding relation between the beam identification codes of the beams and the beam directions;
and the sequence transmission control sub-module is used for controlling the antenna array to transmit the pulse sequence in each beam direction.
Optionally, the SAR value adjusting module includes:
the first adjusting submodule is used for adjusting the radiation power of the antenna array to a first radiation power when the target distance is smaller than or equal to a first distance threshold value so as to reduce the SAR value of the electronic equipment;
the second adjusting submodule is used for adjusting the radiation power of the antenna array to a second radiation power to reduce the SAR value of the electronic equipment when the target distance is larger than the first distance threshold and not larger than a second distance threshold;
a holding sub-module for holding the radiation power of the antenna array to hold the SAR value of the electronic device when the target distance is greater than a first distance threshold.
According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method of any one of the above.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium, in which an executable computer program is provided, which when executed by a processor is capable of implementing the method as described in any one of the above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
as can be seen from the foregoing embodiments, the solution provided in the embodiments of the present disclosure may control an antenna array of an electronic device to transmit a pulse sequence to a plurality of designated directions, and obtain an echo sequence corresponding to the pulse sequence; then, acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence; and then, adjusting the SAR value of the electronic equipment according to the target distance. Therefore, in the embodiment, the antenna array of the electronic device can be directly multiplexed to obtain the target distance between the antenna array and the target object and the SAR value can be adjusted by using the target distance, an SAR sensor or a distance sensor does not need to be arranged in the electronic device, the occupation of the electronic device is reduced, and the cost of the electronic device is favorably reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flow chart illustrating a method of adjusting SAR values according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating the effect of transmitting signals and receiving echo signals by an antenna array according to an exemplary embodiment.
FIG. 3 is a flowchart illustrating obtaining a target distance in accordance with an exemplary embodiment.
Fig. 4 is a block diagram illustrating an apparatus for adjusting a SAR value according to an exemplary embodiment.
FIG. 5 is a block diagram illustrating a target distance acquisition module in accordance with an exemplary embodiment.
FIG. 6 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The following exemplary described embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure as recited in the claims below.
In order to solve the above technical problem, an embodiment of the present disclosure provides a method for adjusting an SAR value, which is applied to an electronic device including an antenna array, for example, a smart phone, a tablet computer, and the like, and fig. 1 is a flowchart illustrating a method for adjusting an SAR value according to an exemplary embodiment.
Referring to fig. 1, a method for adjusting an SAR value includes steps 11 to 13:
in step 11, the antenna array of the electronic device is controlled to transmit a pulse sequence to a plurality of designated directions, and an echo sequence corresponding to the pulse sequence is acquired.
In this embodiment, the electronic device is provided with an antenna array, and the antenna array may transmit and receive data according to a preset working frequency band. Taking the millimeter wave antenna array as an example, the operating frequency band may include at least one of the following: FR1 (frequency range is 450 MHz-6 GHz) and FR2 (frequency range is 24 GHz-52 GHz). Considering that the frequency of the millimeter wave can reach 300GHz, that is, the wavelength is 1 to 10 millimeters, a technician can select a corresponding antenna array and frequency band according to a specific scenario, and the corresponding scheme falls within the protection scope of the present disclosure.
Considering that the wavelength of the millimeter wave is particularly short, the antenna array may be arranged at the left (or right) and top of the front of the electronic device, i.e. the antenna array comprises two polarization directions; the antenna array can search for new signals and identify old signals through horizontal scanning and vertical scanning, and can be switched rapidly, so that the antenna array can cover the whole space, and the purpose of receiving and transmitting data is achieved.
In this embodiment, the antenna array in the electronic device is set in a ranging state in addition to a data transceiving state. The ranging state and the working state can be mutually converted according to requirements.
In an example, the antenna array has a duty cycle; each duty cycle may continue to be divided into a first time period and a second time period; the antenna array works in a transceiving state in the first time period, namely is used for transceiving data required by the electronic equipment; and in the second time period, the antenna array works in a ranging state, namely the antenna array is used for transmitting the echo sequences corresponding to the pulse sequences and receiving the echo sequences. The respective durations of the first time period and the second time period can be set according to an actual scene, and if the value range of the ratio value of the first time period to the second time period is 1:1 to 10:1, which is not limited herein.
It should be noted that the above-mentioned transmission pulse sequence may include at least one pulse, the number of pulses may be set according to a specific scenario, for example, 1 to 10, and each pulse may include a preset characteristic value. Wherein the characteristic value comprises at least one of: the content of the pulse, the duty cycle of the pulse and the intensity of the pulse. Taking the example that the characteristic values are pulse-to-pulse contents, each pulse may include different contents, such as the 1 st pulse including the number 1, the 2 nd pulse including the number 2, \8230, the nth pulse including the number n, which facilitates subsequent alignment of the echo sequence and the pulse sequence by the characteristic values (e.g., numbers 1-n).
In another example, the antenna array may operate in a transceiving state, and a period of a ranging state may be added after a predetermined number (e.g., 5-10) of transceiving state periods. Therefore, the time occupied by the test state can be reduced in the example, and the transceiving efficiency of the antenna array is ensured; and, a ranging function may be added to achieve the effect of detecting the target object.
In yet another example, the electronic device may include other sensors, such as pressure sensors, gyroscopes, velocity sensors, etc., which may detect a change in the state of motion of the electronic device, such as from stationary to moving. After the electronic equipment determines that the electronic equipment starts to move or the movement state is changed according to the detection data of the sensor, the electronic equipment controls the antenna array to be switched to the ranging state, because the electronic equipment is usually in the used state when in the movement state. Therefore, in the example, the distance measurement is performed according to the motion state of the electronic device, so that the time occupied by the test state can be reduced, and the transceiving efficiency of the antenna array is ensured under the condition of ensuring the distance measurement function.
In this embodiment, a beam direction sequence corresponding to the antenna array may be pre-stored in the electronic device. The beam direction sequence includes a plurality of beam directions, any two of which are directed differently. For example, the antenna array may transmit pulses into a 180 degree range of the electronic device facing away (relative to the other side of the display screen of the electronic device), assuming that the beam direction sequence includes 6 beam directions, when the designated direction of the beam direction sequence is {0, 30, 60, 90, 120, 150, 180} degrees. Meanwhile, the electronic device may pre-store a corresponding relationship between the beam identification code (beam id) and the beam direction, and the beam direction of the antenna array changes after the beam identification code of the antenna array changes. Because the antenna array includes multiple antennas, the beam identification code may be determined in the beam direction, and then the beam direction of the antenna array may be adjusted to the above-mentioned designated direction by selecting some or all of the multiple antennas to work according to the beam identification code.
In this embodiment, when determining that the antenna array is switched to the ranging state, the electronic device may control a beam direction of the antenna array to face a specific direction, for example, a processor in the electronic device may send a beam direction by using an antenna array controller (such as a data processing chip, a single chip microcomputer, or the like), and at this time, the antenna array may determine an antenna that needs to operate. The pulse sequence is transmitted in the antenna array one designated direction at a time. When the pulse encounters a target object, an echo signal is formed, and the effect is shown in fig. 2. Referring to fig. 2, the antenna array on the electronic device shown in fig. 2 transmits a signal in a designated direction, and an echo signal is formed after the signal meets a target object (i.e., a user's hand). The electronic device can simultaneously control one receiving channel to acquire the echo sequence corresponding to the transmitting pulse sequence. After the pulse sequence is transmitted in one designated direction, the pulse sequence is transmitted in another designated direction, and so on until the pulse sequence is transmitted in a plurality of designated directions. Finally, the electronic device may acquire an echo sequence corresponding to the pulse sequence in each of the specified directions.
It should be noted that, when the antenna array transmits each pulse in the pulse sequence toward a specific direction, ideally, each pulse in the echo sequence corresponds to the sequence of each pulse in the pulse sequence one by one; in practice, the pulses in the echo train may be misaligned, for example, by receiving the 2 nd pulse later than the 3 rd pulse, in consideration of jitter or motion of the electronic device.
In step 12, a target distance between the antenna array and a target object is obtained according to the echo sequence and the pulse sequence.
In this embodiment, the electronic device may obtain the target distance between the antenna array and the target object according to the echo sequence and the pulse sequence, including:
referring to fig. 3, in step 31, the electronics may obtain a characteristic value for each pulse in both the echo sequence and the pulse sequence, such as the number 1-n each pulse contains.
In step 32, the electronics can align the echo sequence and the pulse sequence based on the feature values. The electronic device can acquire the pulses in the echo sequence matched with the eigenvalues of the pulses in the pulse sequence, and then adjust the sequence of the pulses in the echo sequence according to the transmitting sequence of the pulses in the pulse sequence to obtain the aligned echo sequence and pulse sequence.
For example, the electronic device may determine that the characteristic values in the pulse sequence are sequentially a number 1, a number 2, a number 3, a number 4, and a number 5, and may determine that the characteristic values in the pulse sequence are sequentially a number 1, a number 3, a number 2, a number 4, and a number 5. And adjusting the pulses in the echo sequence in the sequence of the pulses so that the characteristic values in the echo sequence correspond to the characteristic values in the pulse sequence one to one.
In step 33, the electronics can acquire the time difference of the echo sequence and the pulse sequence. For example, the electronic device may sequentially obtain the time difference between each pair of pulses in the echo sequence and the pulse sequence, and then take the average of the time differences of all the pulses as the time difference. For another example, the electronic device may obtain time differences of odd-numbered, even-numbered, or designated bit pulse pairs in the echo sequence and the pulse sequence, and then use an average value of the time differences as the time difference value, which may also be in the scheme of the present disclosure. For another example, the electronic device may obtain a time difference between the echo sequence and the 1 st pair of pulse pairs in the pulse sequence, and use the time difference as the time difference value, which may also be the scheme of the present disclosure.
In step 34, the electronic device may calculate a distance between the antenna array and the target object according to the time difference and the speed of light. Since the speed of the pulse transmitted by the antenna array is the speed of light, the electronic device can calculate the distance between the antenna array and the target object by using the time difference and the speed of light, i.e., d = c × T _ delay/2, where c is the speed of light and T _ delay represents the time taken by the pulse to and fro.
In step 35, the electronic device may determine a target distance between the antenna array and a target object according to the distance. In an example, since the electronic device may control the antenna array to transmit the pulse sequence to a plurality of designated directions, the distances between the plurality of antenna arrays and the target object may be obtained in step 34, that is, each distance in the plurality of distances corresponds to one of the plurality of designated directions. At this time, the electronic device may acquire a minimum distance of the plurality of distances and take the minimum distance as a target distance between the antenna array and the target object.
In another example, the electronic device may calculate a 1 st distance between the antenna array and the target object when the antenna array transmits the pulse sequence toward the 2 nd specified direction; when the antenna array transmits the pulse sequence towards the 3 rd specified direction, the 2 nd distance between the antenna array and the target object is calculated, and so on. In this way, when the first preset number (e.g., 1 to 5) of distances are continuously present and are less than or equal to the preset distance threshold (e.g., 5mm to 15 mm), the electronic device may use the minimum distance of the first preset number of distances as the target distance between the antenna array and the target object. After determining the target distance, the electronic device may simultaneously control the antenna array to stop transmitting the pulse sequence. Thus, in this example, the target distance can be obtained, the number of pulses transmitted by the antenna array can be reduced, and the time for ranging is reduced.
In step 13, the SAR value of the electronic device is adjusted according to the target distance.
In this embodiment, the electronic device may adjust the SAR value of the electronic device according to the target distance. The electronic equipment is internally provided with a corresponding relation between the SAR and the radiation function, and the radiation power corresponding to the SAR value can be searched from the corresponding relation.
The scheme for adjusting the SAR value is described by taking as an example that the target distance is provided with 2 distance thresholds, namely a first distance threshold (such as 5 mm) and a second distance threshold (such as 15 mm):
when the target distance is less than or equal to the first distance threshold, adjusting the radiation power of the antenna array to a first radiation power (e.g., by 20dB, which is adjustable) to reduce the SAR value of the electronic device; when the target distance is greater than the first distance threshold and not greater than the second distance threshold, adjusting the radiation power of the antenna array to a second radiation power (e.g., by 10dB, which is adjustable) to reduce the SAR value of the electronic device; when the target distance is larger than a first distance threshold value, maintaining the radiation power of the antenna array so as to maintain the SAR value of the electronic equipment.
It should be noted that, in practical applications, the distance threshold of the target distance may be set according to a specific scenario, for example, 1 to 5, so as to more accurately adjust the radiation function of the antenna array, and achieve the effect of accurately controlling the radiation function and the SAR value.
The scheme provided by the embodiment of the disclosure can control an antenna array of an electronic device to transmit a pulse sequence to a plurality of specified directions and acquire an echo sequence corresponding to the pulse sequence; then, acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence; and then, adjusting the SAR value of the electronic equipment according to the target distance. Therefore, in the embodiment, the antenna array of the electronic device can be directly multiplexed to obtain the target distance between the antenna array and the target object and the SAR value can be adjusted by using the target distance, an SAR sensor or a distance sensor does not need to be arranged in the electronic device, the occupation of the electronic device is reduced, and the cost of the electronic device is favorably reduced.
On the basis of the methods of the embodiments shown in fig. 1 to fig. 3, an embodiment of the present disclosure further provides an apparatus for adjusting an SAR value, referring to fig. 4, where the apparatus includes:
an echo sequence acquiring module 41, configured to control an antenna array of the electronic device to transmit a pulse sequence to multiple specified directions, and acquire an echo sequence corresponding to the pulse sequence;
a target distance obtaining module 42, configured to obtain a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence;
and an SAR value adjusting module 43, configured to adjust the SAR value of the electronic device according to the target distance.
In one embodiment, referring to fig. 5, the target distance obtaining module 42 includes:
a feature value obtaining sub-module 51, configured to obtain a feature value of each pulse in both the echo sequence and the pulse sequence;
a sequence alignment sub-module 52 for aligning the echo sequence and the pulse sequence based on the feature values;
a difference obtaining submodule 53, configured to obtain a time difference between the echo sequence and the pulse sequence;
a distance calculating submodule 54, configured to calculate a distance between the antenna array and the target object according to the time difference and the speed of light;
and a distance determining submodule 55, configured to determine a target distance between the antenna array and the target object according to the distance.
In one embodiment, the characteristic values include at least one of: the corresponding content of the pulse, the duty cycle of the pulse and the intensity of the pulse.
In one embodiment, aligning the echo sequence and the pulse sequence based on the feature values comprises:
acquiring pulses in the echo sequence matched with eigenvalues of each pulse in the pulse sequence;
and adjusting the sequence of each pulse in the echo sequence according to the transmitting sequence of each pulse in the pulse sequence to obtain the aligned echo sequence and the pulse sequence.
In one embodiment, the difference obtaining sub-module includes:
the time difference acquisition unit is used for sequentially acquiring the time difference of each pair of pulses in the echo sequence and the pulse sequence;
and the difference value acquisition unit is used for taking the average value of the time differences of all the pulses as the time difference value.
In one embodiment, the distance determination submodule includes:
a minimum distance acquisition unit configured to acquire a minimum distance among the plurality of distances; each distance in the plurality of distances corresponds to the plurality of designated directions one to one;
and the target distance acquisition unit is used for taking the minimum distance as the target distance between the antenna array and a target object.
In one embodiment, the distance determination submodule includes:
and the target distance acquisition unit is used for taking the minimum distance in a first preset number of distances as the target distance between the antenna array and a target object when the first preset number of distances are less than or equal to a preset distance threshold value continuously.
In one embodiment, the echo sequence acquisition module includes:
the direction acquisition submodule is used for sequentially acquiring the beam directions of the beam direction sequence; the beam direction sequence comprises a plurality of beam directions, and the directions of any two beam directions are different;
the identification code acquisition sub-module is used for sequentially modifying the beam identification codes of the antenna array into the beam identification codes corresponding to the beam directions based on the corresponding relation between the beam identification codes of the beams and the beam directions;
and the sequence transmission control sub-module is used for controlling the antenna array to transmit the pulse sequence in each beam direction.
In one embodiment, the SAR value adjustment module comprises:
the first adjusting submodule is used for adjusting the radiation power of the antenna array to a first radiation power when the target distance is smaller than or equal to a first distance threshold value so as to reduce the SAR value of the electronic equipment;
the second adjusting sub-module is used for adjusting the radiation power of the antenna array to a second radiation power when the target distance is larger than a first distance threshold and not larger than a second distance threshold so as to reduce the SAR value of the electronic equipment;
a keeping sub-module, configured to keep the radiation power of the antenna array to keep the SAR value of the electronic device when the target distance is greater than a first distance threshold.
It can be understood that the apparatus provided in the embodiment of the present disclosure corresponds to the method shown in fig. 1, and specific contents may refer to the contents of each embodiment of the method, which are not described herein again.
FIG. 6 is a block diagram illustrating an electronic device in accordance with an example embodiment. For example, the electronic device 600 may be a smartphone, a computer, a digital broadcast terminal, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.
Referring to fig. 6, electronic device 600 may include one or more of the following components: a processing component 602, a memory 604, a power component 606, a multimedia component 608, an audio component 610, an interface for input/output (I/O) 612, a sensor component 614, a communication component 616, and an image capture component 618.
The processing component 602 generally controls overall operation of the electronic device 600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute computer programs. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.
The memory 604 is configured to store various types of data to support operations at the electronic device 600. Examples of such data include computer programs, contact data, phonebook data, messages, pictures, videos, etc. for any application or method operating on the electronic device 600. The memory 604 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 606 provides power to the various components of the electronic device 600. The power components 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 600. The power supply 606 may include a power chip, and the controller may communicate with the power chip to control the power chip to turn on or off the switching device, so that the battery supplies power or does not supply power to the motherboard circuit.
The multimedia component 608 includes a screen that provides an output interface between the electronic device 600 and the target object. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a target object. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
The audio component 610 is configured to output and/or input audio signals. For example, the audio component 610 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 604 or transmitted via the communication component 616. In some embodiments, audio component 610 further includes a speaker for outputting audio signals.
The I/O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc.
The sensor component 614 includes one or more sensors for providing various aspects of status assessment for the electronic device 600. For example, the sensor component 614 may detect an open/closed state of the electronic device 600, the relative positioning of components, such as a display and keypad of the electronic device 600, the sensor component 614 may also detect a change in the position of the electronic device 600 or a component, the presence or absence of a target object in contact with the electronic device 600, orientation or acceleration/deceleration of the electronic device 600, and a change in the temperature of the electronic device 600. In this example, the sensor assembly 614 may include a magnetic sensor, a gyroscope, and a magnetic field sensor, wherein the magnetic field sensor includes at least one of: hall sensor, thin film magneto resistance sensor, magnetic liquid acceleration sensor.
The communication component 616 is configured to facilitate communications between the electronic device 600 and other devices in a wired or wireless manner. The electronic device 600 may access a wireless network based on a communication standard, such as WiFi,2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the electronic device 600 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.
An embodiment of the present disclosure further provides an electronic device, including:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method of any one of the above.
Embodiments of the present disclosure also provide a computer-readable storage medium, where an executable computer program is executed by a processor, and the storage medium can implement the method according to any one of the above. The readable storage medium may be, among others, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (20)
1. A method of adjusting SAR values, applied to an electronic device comprising an antenna array, the method comprising:
controlling an antenna array of the electronic equipment to transmit a pulse sequence to a plurality of specified directions and acquiring an echo sequence corresponding to the pulse sequence;
acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence;
and adjusting the SAR value of the electronic equipment according to the target distance.
2. The method of claim 1, wherein obtaining a target distance between the antenna array and a target object from the echo sequence and the pulse sequence comprises:
obtaining a feature value of each pulse in both the echo sequence and the pulse sequence;
aligning the echo sequence and the pulse sequence based on a characteristic value;
acquiring a time difference value between the echo sequence and the pulse sequence;
calculating the distance between the antenna array and a target object according to the time difference and the light speed;
and determining a target distance between the antenna array and a target object according to the distance.
3. The method of claim 2, wherein the characteristic value comprises at least one of: the content of the pulse, the duty cycle of the pulse and the intensity of the pulse.
4. The method of claim 2, wherein aligning the echo sequence and the pulse sequence based on a feature value comprises:
acquiring pulses in the echo sequence which are matched with eigenvalues of all pulses in the pulse sequence;
and adjusting the sequence of each pulse in the echo sequence according to the transmitting sequence of each pulse in the pulse sequence to obtain the aligned echo sequence and the pulse sequence.
5. The method of claim 2, wherein obtaining a time difference between the echo sequence and the pulse sequence comprises:
sequentially acquiring the time difference of each pair of pulses in the echo sequence and the pulse sequence;
and taking the average value of the time differences of all the pulses as the time difference value.
6. The method of claim 2, wherein determining a target distance between the antenna array and a target object based on the distance comprises:
obtaining a minimum distance of the plurality of distances; each distance in the plurality of distances corresponds to the plurality of designated directions one by one;
and taking the minimum distance as a target distance between the antenna array and a target object.
7. The method of claim 2, wherein determining a target distance between the antenna array and a target object based on the distance comprises:
and when a first preset number of distances are continuously smaller than or equal to a preset distance threshold value, taking the minimum distance in the first preset number of distances as the target distance between the antenna array and the target object.
8. The method of claim 1, wherein controlling an antenna array of the electronic device to transmit pulse sequences in a plurality of specified directions comprises:
sequentially acquiring the beam directions of the beam direction sequence; the beam direction sequence comprises a plurality of beam directions, and the directions of any two beam directions are different;
based on the corresponding relation between the beam identification code of the beam and the beam direction, the beam identification code of the antenna array is modified into the beam identification code corresponding to the beam direction in sequence;
and controlling the antenna array to transmit the pulse sequence in each beam direction.
9. The method of claim 1, wherein adjusting the SAR value of the electronic device as a function of the target distance comprises:
when the target distance is smaller than or equal to a first distance threshold value, adjusting the radiation power of the antenna array to a first radiation power so as to reduce the SAR value of the electronic equipment;
when the target distance is larger than a first distance threshold and not larger than a second distance threshold, adjusting the radiation power of the antenna array to a second radiation power so as to reduce the SAR value of the electronic equipment;
when the target distance is greater than a first distance threshold, maintaining the radiation power of the antenna array to maintain the SAR value of the electronic device.
10. An apparatus for adjusting SAR, applied to an electronic device including an antenna array, the apparatus comprising:
the echo sequence acquisition module is used for controlling the antenna array of the electronic equipment to transmit pulse sequences to a plurality of specified directions and acquiring echo sequences corresponding to the pulse sequences;
the target distance acquisition module is used for acquiring a target distance between the antenna array and a target object according to the echo sequence and the pulse sequence;
and the SAR value adjusting module is used for adjusting the SAR value of the electronic equipment according to the target distance.
11. The apparatus of claim 10, wherein the target distance acquisition module comprises:
a characteristic value obtaining sub-module for obtaining a characteristic value of each pulse in both the echo sequence and the pulse sequence;
a sequence alignment submodule for aligning the echo sequence and the pulse sequence based on the characteristic value;
the difference value acquisition sub-module is used for acquiring the time difference value of the echo sequence and the pulse sequence;
the distance calculation sub-module is used for calculating the distance between the antenna array and a target object according to the time difference value and the light speed;
and the distance determining sub-module is used for determining a target distance between the antenna array and a target object according to the distance.
12. The apparatus of claim 11, wherein the characteristic value comprises at least one of: the content of the pulse, the duty cycle of the pulse and the intensity of the pulse.
13. The apparatus of claim 11, wherein aligning the echo sequence and the pulse sequence based on a feature value comprises:
acquiring pulses in the echo sequence which are matched with eigenvalues of all pulses in the pulse sequence;
and adjusting the sequence of each pulse in the echo sequence according to the transmitting sequence of each pulse in the pulse sequence to obtain the aligned echo sequence and the pulse sequence.
14. The apparatus of claim 11, wherein the difference acquisition sub-module comprises:
a time difference acquiring unit, configured to sequentially acquire a time difference between each pair of pulses in the echo sequence and the pulse sequence;
and the difference value acquisition unit is used for taking the average value of the time differences of all the pulses as the time difference value.
15. The apparatus of claim 11, wherein the distance determination sub-module comprises:
a minimum distance acquisition unit configured to acquire a minimum distance among the plurality of distances; each distance in the plurality of distances corresponds to the plurality of designated directions one to one;
and the target distance acquisition unit is used for taking the minimum distance as the target distance between the antenna array and a target object.
16. The apparatus of claim 11, wherein the distance determination submodule comprises:
and the target distance acquisition unit is used for taking the minimum distance in the first preset number of distances as the target distance between the antenna array and a target object when the first preset number of distances are smaller than or equal to a preset distance threshold value continuously.
17. The apparatus of claim 10, wherein the echo sequence acquisition module comprises:
the direction acquisition sub-module is used for sequentially acquiring the beam directions of the beam direction sequence; the beam direction sequence comprises a plurality of beam directions, and the directions of any two beam directions are different;
the identification code acquisition sub-module is used for sequentially modifying the beam identification codes of the antenna array into the beam identification codes corresponding to the beam directions based on the corresponding relation between the beam identification codes of the beams and the beam directions;
and the sequence transmission control sub-module is used for controlling the antenna array to transmit the pulse sequence in each beam direction.
18. The apparatus of claim 10, wherein the SAR value adjustment module comprises:
the first adjusting submodule is used for adjusting the radiation power of the antenna array to a first radiation power when the target distance is smaller than or equal to a first distance threshold value so as to reduce the SAR value of the electronic equipment;
the second adjusting submodule is used for adjusting the radiation power of the antenna array to a second radiation power to reduce the SAR value of the electronic equipment when the target distance is larger than the first distance threshold and not larger than a second distance threshold;
a holding sub-module for holding the radiation power of the antenna array to hold the SAR value of the electronic device when the target distance is greater than a first distance threshold.
19. An electronic device, comprising:
a processor;
a memory for storing a computer program executable by the processor;
wherein the processor is configured to execute the computer program in the memory to implement the method of any one of claims 1 to 9.
20. A computer-readable storage medium, characterized in that an executable computer program in the storage medium, when executed by a processor, is capable of implementing the method according to any one of claims 1 to 9.
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