CN113364530B - Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves - Google Patents
Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves Download PDFInfo
- Publication number
- CN113364530B CN113364530B CN202110616911.7A CN202110616911A CN113364530B CN 113364530 B CN113364530 B CN 113364530B CN 202110616911 A CN202110616911 A CN 202110616911A CN 113364530 B CN113364530 B CN 113364530B
- Authority
- CN
- China
- Prior art keywords
- target
- ultrasonic
- contour
- target object
- coordinate point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
Abstract
The application discloses a specific absorption rate SAR adjusting method and device based on ultrasonic waves, and the method comprises the following steps: the electronic equipment determines a target distance based on the ultrasonic module, wherein the target distance is the distance between the electronic equipment and a target object; when the target distance is greater than or equal to the preset distance, judging whether the target object is a living body based on the ultrasonic module; and when the target object is the living body, adjusting the SAR value of the electronic device. According to the method and the device, the distance between the electronic equipment and the target object is detected by the ultrasonic module, and then when the target object is detected to be a living body, the SAR value of the electronic equipment is adjusted in real time according to the distance, so that the requirements on communication performance and human body safety are met.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a method and an apparatus for adjusting a specific absorption rate SAR based on ultrasonic waves.
Background
In general, in mobile phone type electronic products, proximity sensors (such as capacitive proximity sensors and photosensitive proximity sensors) are used to detect a call state and a human body approaching state, so as to meet the requirements of communication performance and human body safety. The capacitance proximity sensor is used for judging the basis through the change of capacitance values caused by the approach of a human body, and the photosensitive proximity sensor is used for judging the basis through detecting whether the light hole is shielded by other objects to cause energy reflection. But when other obstacles (such as mobile phone shells, leather covers, table surfaces, etc.) approach the sensor, the changes of the capacitive proximity sensor and the photosensitive proximity sensor are also affected, thereby causing misjudgment.
Disclosure of Invention
The embodiment of the application provides a specific absorption rate SAR adjusting method and device based on ultrasonic waves, which can flexibly adjust the SAR value of electronic equipment and meet the requirements of communication performance and human body safety.
In a first aspect, an embodiment of the present application provides an ultrasound-based specific absorption rate SAR adjustment method, which is applied to an electronic device including an ultrasound module, and the method includes:
determining a target distance based on the ultrasonic module, the target distance being a distance between the electronic device and a target object;
when the target distance is smaller than a preset distance, judging whether the target object is a living body based on the ultrasonic module;
adjusting a Specific Absorption Rate (SAR) value of the electronic device when the target object is the living body.
In a second aspect, an embodiment of the present application provides an apparatus for adjusting a specific absorption rate, SAR, based on an ultrasonic wave, applied to an electronic device including an ultrasonic wave module, the apparatus including:
a determination unit configured to determine a target distance based on the ultrasonic module, the target distance being a distance between the electronic device and a target object;
a determination unit configured to determine whether the target object is a living body based on the ultrasonic module when the target distance is smaller than a preset distance;
an adjustment unit configured to adjust a Specific Absorption Rate (SAR) value of the electronic device when the target object is the living body.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing steps in any method of the first aspect of the embodiment of the present application.
In a fourth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods of the first aspect of the present application.
In a fifth aspect, the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
It can be seen that, in the embodiment of the present application, the electronic device determines a target distance based on the ultrasonic module, where the target distance is a distance between the electronic device and a target object; when the target distance is greater than or equal to the preset distance, judging whether the target object is a living body based on the ultrasonic module; and when the target object is the living body, adjusting the SAR value of the electronic device. According to the method and the device, the distance between the electronic equipment and the target object is detected by the ultrasonic module, and then when the target object is detected to be a living body, the SAR value of the electronic equipment is adjusted in real time according to the distance, so that the requirements on communication performance and human body safety are met.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a software structure of an electronic device according to an embodiment of the present application;
fig. 3 is a schematic flowchart of an ultrasound-based specific absorption rate SAR adjustment method according to an embodiment of the present application;
fig. 4 is a schematic flowchart illustrating a process of determining whether a target object is a living body based on an ultrasonic module according to an embodiment of the present application;
FIG. 5 is a schematic diagram of mapping a first location and a second location to a coordinate system according to an embodiment of the present application;
fig. 6 is a block diagram illustrating functional units of an apparatus for adjusting specific absorption rate SAR based on ultrasonic waves according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
In order to better understand the scheme of the embodiments of the present application, the following first introduces the related terms and concepts that may be involved in the embodiments of the present application.
1) The electronic device may be a portable electronic device such as a cell phone, a tablet, a wearable electronic device with wireless communication capabilities (e.g., a smart watch), etc., that also contains other functions such as personal digital assistant and/or music player functions. Exemplary embodiments of the portable electronic device include, but are not limited to, portable electronic devices that carry an IOS system, an Android system, a Microsoft system, or other operating system. The portable electronic device may also be other portable electronic devices such as a Laptop computer (Laptop) or the like.
2) The ultrasonic wave is a sound wave with the frequency higher than 20000Hz, has good directivity and strong reflection capability, is easy to obtain more concentrated sound energy, has a longer propagation distance in water than in air, and can be used for distance measurement, speed measurement, cleaning, welding, stone breaking, sterilization, disinfection and the like. The method has a plurality of applications in medicine, military, industry and agriculture.
3) The Specific Absorption Rate (SAR) is an electromagnetic energy Absorption ratio of a mobile phone or a wireless product, and is defined as: under the action of the external electromagnetic field, an induced electromagnetic field is generated in the human body. . Since various organs of the human body are lossy media, the electromagnetic field in the body will generate electric currents, resulting in absorption and dissipation of electromagnetic energy, and SAR is commonly used in biological dosimetry to characterize this physical process. The SAR value generally refers to heat energy generated by electromagnetic waves in a mobile phone product, and reflects the influence of the electromagnetic energy on human bodies, and the larger the numerical value is, the larger the influence on the human bodies is; otherwise, the influence is small.
Fig. 1 shows a schematic structural diagram of an electronic device 100. The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charge management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, an ultrasonic module 190, and the like.
It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or combine certain components, or split certain components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. Wherein the different processing units may be separate components or may be integrated in one or more processors. In some embodiments, the electronic device 100 may also include one or more processors 110. The controller can generate an operation control signal according to the instruction operation code and the time sequence signal to complete the control of instruction fetching and instruction execution. In other embodiments, a memory may also be provided in processor 110 for storing instructions and data. Illustratively, the memory in the processor 110 may be a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. This avoids repeated accesses, reduces the latency of the processor 110, and thus increases the efficiency with which the electronic device 100 processes data or executes instructions.
In some embodiments, processor 110 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit audio source (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose-output (GPIO) interface, a SIM card interface, and/or a USB interface. The USB interface 130 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the electronic device 100, and may also be used to transmit data between the electronic device 100 and a peripheral device. The USB interface 130 may also be used to connect to a headset to play audio through the headset.
It should be understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only an illustration, and does not limit the structure of the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.
The charging management module 140 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger via the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the electronic device 100. The charging management module 140 may also supply power to the electronic device through the power management module 141 while charging the battery 142.
The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives an input of the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the external memory, the ultrasonic module 190, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In some other embodiments, the power management module 141 may also be disposed in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may be disposed in the same device.
The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.
The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.
The mobile communication module 150 may provide a solution including wireless communication of 2G/3G/4G/5G, etc. applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.
The wireless communication module 160 may provide a solution for wireless communication applied to the electronic device 100, including Wireless Local Area Networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth), global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (IR), UWB, and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves via the antenna 2 to radiate the electromagnetic waves.
The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to extend the memory capability of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.
Internal memory 121 may be used to store one or more computer programs, which include instructions. The processor 110 may execute the above-mentioned instructions stored in the internal memory 121, so as to enable the electronic device 100 to execute the method for displaying page elements provided in some embodiments of the present application, and various applications and data processing. The internal memory 121 may include a program storage area and a data storage area. Wherein, the storage program area can store an operating system; the storage program area may also store one or more applications (e.g., gallery, contacts, etc.), and the like. The storage data area may store data (e.g., photos, contacts, etc.) created during use of the electronic device 100, and the like. Further, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic disk storage components, flash memory components, universal Flash Storage (UFS), and the like. In some embodiments, the processor 110 may cause the electronic device 100 to execute the method for displaying page elements provided in the embodiments of the present application and other applications and data processing by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor 110. The electronic device 100 may implement audio functions through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor, etc. Such as music playing, recording, etc.
The sensor module 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a touch sensor 180I, and the like.
In this embodiment, at least one side frame of the electronic device may include an ultrasonic module 190, where the ultrasonic module 190 includes M ultrasonic transmitting modules and M ultrasonic receiving modules, where M is a positive integer; above-mentioned M ultrasonic emission modules and M ultrasonic receiving module can be integrated on Flexible Circuit board (Flexible Printed Circuit, FPC), above-mentioned M ultrasonic emission module can adopt piezoceramics piece, piezoceramics piece is an electron pronunciation component, can put into piezoceramics dielectric material in the middle of two circular electrodes of copper, when switch-on interchange audio signal on two electrodes, the piezoceramics piece can vibrate and produce corresponding sound according to the big or small frequency of signal, the oscillation frequency when piezoceramics piece surpasss 20KHz, above-mentioned piezoceramics piece can send the ultrasonic wave.
Optionally, as shown in fig. 2, the position structure diagram of an ultrasonic module is shown, where the ultrasonic module includes M ultrasonic receiving modules and M ultrasonic transmitting modules, the ultrasonic transmitting modules and the corresponding ultrasonic receiving modules are distributed at intervals, and the M ultrasonic receiving and transmitting modules may be integrated on a Flexible Printed Circuit (FPC), where a specific manner is not limited herein; as shown in fig. 2, fig. 2 includes 10 pairs of ultrasonic transceiver modules (10 ultrasonic receiving modules and 10 ultrasonic transmitting modules), wherein each side includes 5 pairs of ultrasonic transceiver modules, and each ultrasonic transmitting module and its corresponding ultrasonic receiving module are distributed at intervals.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for adjusting a specific absorption rate SAR based on ultrasound according to an embodiment of the present application, applied to the electronic device shown in fig. 1, and as shown in fig. 3, the method for adjusting a specific absorption rate SAR based on ultrasound includes the following operations.
S310, determining a target distance based on the ultrasonic module, wherein the target distance is the distance between the electronic equipment and a target object.
The ultrasonic module can be used as a detection mode for detecting whether a human body approaches or leaves the electronic equipment. The method comprises the following specific steps: the ultrasonic module transmits ultrasonic signals, the ultrasonic signals are reflected when encountering obstacles, the distance between the obstacles and the ultrasonic module can be calculated according to the round-trip time of the ultrasonic waves and the propagation speed of the ultrasonic waves, and then whether a human body approaches or leaves can be judged in real time.
The ultrasonic module comprises M ultrasonic receiving modules and M ultrasonic transmitting modules, wherein M is a positive integer.
In the embodiment of the application, M ultrasonic receiving modules and M ultrasonic transmitting modules can be additionally arranged on the basis of the original circuit of the electronic equipment in advance, for example, the M ultrasonic receiving modules and the M ultrasonic transmitting modules can be arranged on the side of the electronic equipment and are positioned on the same horizontal plane with a display screen of the electronic equipment; or the M ultrasonic wave receiving modules and the M ultrasonic wave transmitting modules can be arranged on the back of the electronic equipment, namely, away from the display screen.
Optionally, the determining a target distance based on the ultrasound module includes: respectively receiving M third ultrasonic signals transmitted to the periphery of the electronic equipment by the M ultrasonic transmitting modules through the M ultrasonic receiving modules; calculating the flight time of the M third ultrasonic signals to obtain M third flight time; determining the minimum third flight duration of the M third flight durations as a target flight duration; calculating the target distance based on the target flight time.
When the electronic device is in an operating state, the CPU main control chip of the electronic device may periodically send an ultrasonic signal sending instruction to the ultrasonic modules, so that the M ultrasonic emission modules send ultrasonic signals (i.e., third ultrasonic signals) in directions parallel to the electronic device. When an obstacle exists in a certain distance range of the electronic equipment, the emitted ultrasonic signal can be reflected by the obstacle to obtain an echo signal. The timing process may be that when it is detected that the ultrasonic wave transmitting module completes transmitting the ultrasonic wave signal, the timing operation is started, and when it is detected that the ultrasonic wave receiving module completes receiving the echo signal, the timing operation is stopped, so as to obtain a flight duration of the ultrasonic wave signal, that is, a third flight duration. The CPU main control chip can record the flight time from the transmission of the ultrasonic signal to the reception of the echo signal of the ultrasonic module.
Further, the electronic device may store the speed of sound of propagation of the ultrasonic signal in advance, and after M third durations of flight of the M third ultrasonic signals are obtained, the actual distance between the electronic device and each obstacle may be calculated according to the third durations of flight and the preset speed of sound. In a specific implementation, a plurality of obstacles may exist around the electronic device, and in order to reduce the calculation amount, the electronic device may use an obstacle corresponding to the smallest third flight duration of the M third flight durations as a target object and then calculate the distance between the target object and the electronic device. Specifically, the actual distance between the electronic device and the target object is obtained by multiplying the measured third flight time of the target object by the preset sound velocity and then dividing by 2.
And S320, when the target distance is smaller than a preset distance, judging whether the target object is a living body or not based on the ultrasonic module.
The electronic device may preset a safety distance between the target object and the electronic device, that is, a preset distance. After the target distance between the target object and the electronic equipment is obtained through calculation, the target distance can be compared with a preset distance, and whether the target distance exceeds the preset distance or not is judged. If the target distance is smaller than the preset distance, the electronic device needs to further determine whether the target device is a living body, and determine whether the electronic device will affect the target device.
Further, if the target distance is greater than or equal to the preset distance, it indicates that the distance between the target object and the electronic device is appropriate at this time, and the normal communication of the electronic device does not affect the target object.
Alternatively, as shown in fig. 4, in the step S320, the determining whether the target object is a living body based on the ultrasound module may include:
s21, M first ultrasonic signals and M second ultrasonic signals which are transmitted to the target object by the M ultrasonic transmitting modules are respectively received by the M ultrasonic receiving modules, the transmitting time difference between the first ultrasonic signals and the second ultrasonic signals is a first interval, and the M first ultrasonic transmitting signals and the M second ultrasonic transmitting signals are in one-to-one correspondence.
Wherein, in order to detect whether the target object is a living body, the M ultrasonic wave transmitting modules may poll and transmit the ultrasonic wave signal to the target device at a first interval based on a certain transmitting power. That is to say, M ultrasonic emission modules transmit M first ultrasonic signals to the target device first, each ultrasonic emission module transmits a first ultrasonic signal to the target device at a preset emission angle, and after a first interval, M ultrasonic emission modules transmit a second ultrasonic signal to the target device at the preset emission angle again, that is, each ultrasonic emission module transmits the first ultrasonic signal and the second ultrasonic signal to the target device at the preset emission angle first. Wherein the first interval is much larger than the time of flight of the ultrasonic signal.
In the embodiment of the application, when the target device is in a moving state, that is, the target device moves towards or away from the electronic device, by periodically transmitting the ultrasonic signal to the target device, the electronic device can determine the moving direction and the moving track of the target object according to the received ultrasonic signal, so as to determine whether the target object is a living body.
In the embodiments of the present application, the first ultrasonic signal and the second ultrasonic signal are transmitted as an example. In other examples, after the second ultrasonic signal is transmitted, the M ultrasonic transmission modules may transmit a third ultrasonic signal to the target device after a first interval, and transmit a fourth ultrasonic signal to the target device after the first interval again, and so on in sequence until the distance between the target object and the electronic device is greater than or equal to the preset distance, or the SAR of the electronic device is adjusted.
S22, respectively calculating the flight time of the M first ultrasonic signals and the flight time of the M second ultrasonic signals to obtain M first flight time and M second flight time.
In this application embodiment, the electronic device may start timing operation to calculate the flight time of the ultrasonic signal, and may also calculate the flight time of the ultrasonic signal by recording the transmission time and the reception time of the ultrasonic wave, which is not limited in this application embodiment.
For example, the electronic device records the sending time of the M ultrasonic wave sending modules sending the first ultrasonic wave signals and the receiving time of the M ultrasonic wave receiving modules receiving the first ultrasonic wave signals, and takes the difference between the receiving time and the sending time of the first ultrasonic wave signals as the first flight time, so as to obtain the first flight time corresponding to each first ultrasonic wave signal. Similarly, the difference between the receiving time and the sending time of the second ultrasonic signal is used as the second flight time to obtain the second flight time of each second ultrasonic signal.
S23, determining the contour and the target motion track of the target object according to the M first flight durations and the M second flight durations.
In this application, the electronic device may calculate, according to the M first flight durations and the M second flight durations, positions where each of the first ultrasonic signals and each of the second ultrasonic signals meet the target object, respectively, and then trace the contour of the target object according to the positions where each of the target objects meets. And determining the motion trail of the target object according to the position of the target object calculated by the first ultrasonic signal and the position of the target object calculated by the second ultrasonic signal.
Optionally, in the step S23, determining the contour and the target motion trajectory of the target object according to the M first flight durations and the M second flight durations specifically includes the following steps:
s231, obtaining emission angles of the M ultrasonic emission modules for respectively emitting the M first ultrasonic signals and the M second ultrasonic signals, and obtaining M first emission angles and M second emission angles.
After the ultrasonic module determines the target object, the electronic device can set the emission angle of each ultrasonic emission module according to the position of the target object and the position of the ultrasonic emission module in the electronic device, so that the first ultrasonic signal and the second ultrasonic signal emitted by each ultrasonic emission module can meet the target object as much as possible. Furthermore, the electronic device can adjust the emission angles of the M ultrasonic emission modules according to the received M first ultrasonic signals, so that the outline of the identified target object is more accurate.
S232, respectively calculating M first positions and M second positions of the target object based on the M first flight durations and the M second flight durations.
In the present application, each ultrasonic transmission module corresponds to a set of parameters, which may include phase, amplitude, transmission time, transmission power, and the like. Above-mentioned M ultrasonic emission module can be to different emission directions with same or different transmitting power transmission M ultrasonic emission signal, when ultrasonic emission signal met the barrier, M ultrasonic emission signal that ultrasonic receiving module can receive the reflection back, and at this moment, ultrasonic emission signal's parameter can change, can obtain M group and include the characteristic parameter of different dimensions, and finally, accessible M group characteristic parameter confirms the position of target object.
For example, M Q-dimensional vectors may be constructed for the above M sets of characteristic parameters, each characteristic parameter may correspond to one Q-dimensional vector, Q is the number of parameters, and assuming that 3 ultrasonic transmission modules transmit the first ultrasonic signal, the parameters of each ultrasonic signal include parameters of 3 dimensions (phase, amplitude and transmission power). Then 3 sets of characteristic parameters, a, can be obtained when 3 ultrasonic receiving modules receive the 3 first ultrasonic signals 0 、a 1 And a 2 Then, 3-dimensional vectors of 3 dimensions corresponding to the 3 ultrasonic signals can be constructed, which are:
X 1 ＝[a 01 a 11 a 12 ]；
X 2 ＝[a 02 a 12 a 22 ]；
X 3 ＝[a 03 a 13 a 23 ]；
can be according to the aboveConstructing a mapping relation between the characteristic parameter construction of 3 dimensions and the position of the target object, and constructing a function F (X) related to the position of the target object, so that the function F (X) can be based on the vector X 1 、X 2 And X 3 Construction matrix X n ：
Finally, it can be based on the matrix X described above n A first position for the target object is determined.
Optionally, the determining the position of the target object through the M sets of feature parameters includes: determining an estimated position corresponding to each Q-dimensional vector according to the M Q-dimensional vectors, wherein each Q-dimensional vector corresponds to one estimated position; calculating Euclidean distance between any two estimated positions in the M estimated positions to obtain
(ii) a euclidean distance; calculate said->
And determining the distance mean value as the position of the target object.
Wherein, when the ultrasonic signal contacts the target object and is reflected back, the received parameter of the ultrasonic receiving module changes, so that the M changed Q-dimensional vectors related to the Q-dimensional characteristic parameter can be obtained, and the first position of each first ultrasonic signal contacting the target object can be obtained through the M Q-dimensional vectors based on the functional relation between the Q-dimensional characteristic parameter structure and the first position, so as to obtain M first positions, specifically, two first positions of the M first positions can be calculated
And &>
In betweenEuclidean distance:
obtaining the estimated touch positions between the M estimated touch positions
The Euclidean distance is calculated to avoid the deviation error of the position calculation, so that the above-mentioned->
The mean of the Euclidean distances may be obtained as a distance mean, and thus, the position corresponding to the distance mean may be considered as the most accurate position.
S233, mapping each first position of the M first positions and a corresponding first emission angle thereof, and each second position of the M second positions and a corresponding second emission angle thereof in a coordinate system, respectively, where a horizontal axis of the coordinate system is a distance and a vertical axis thereof is an angle.
In this application, in order to trace the moving track and the contour of the target object, a first position where each first ultrasonic signal contacts the target object and a second position where each second ultrasonic signal contacts the target object may be respectively mapped into a coordinate system, where a horizontal axis of the coordinate system is a distance between the target object and the electronic device, and a vertical axis of the coordinate system is a transmission angle when each ultrasonic transmission module transmits the ultrasonic signal, where the transmission angle is an included angle between a propagation direction of the ultrasonic signal and the electronic device. Depending on the approximate position of the target object, the electronic device may select one emission angle as the origin, e.g., 90 degrees may be set as the origin when the target object moves parallel to the electronic device; when the target object approaches the electronic device from bottom to top, 0 degrees may be set as the origin. For example, the target object is a triangular object, the target object faces the mobile phone and moves towards the mobile phone, and the measured first positions and second positions can be mapped into the coordinate system through the ultrasonic wave transmitting module and the ultrasonic wave receiving module on the side of the mobile phone, so as to obtain the contour and the motion track shown in fig. 5.
S234, determining the target motion track according to the coordinate point corresponding to the first position and the coordinate point corresponding to the second position;
after the first position and the second position are mapped to the coordinate system, the motion trail of the target object can be determined according to the difference between the position of the target object measured by the first ultrasonic signal and the position of the target object measured by the second ultrasonic signal in the coordinate system.
Optionally, the determining the target motion trajectory according to the coordinate point corresponding to the first position and the coordinate point corresponding to the second position includes: determining a first coordinate point and a second coordinate point, wherein the first coordinate point is a coordinate point corresponding to a median first position in the M first positions, and the second coordinate point is a coordinate point corresponding to a median second position in the M second positions; and connecting the first coordinate point and the second coordinate point by using a smooth curve to obtain the target motion track.
Specifically, in order to avoid the influence of the shaking of the target object on the motion trail, the first coordinate points are selected from the corresponding coordinate points mapped by the first positions, the second coordinate points are selected from the corresponding coordinate points mapped by the second positions, and a connecting line between the first coordinate points and the second coordinate points is used as the target motion trail of the target object. That is, a line connecting a coordinate point in the middle of the target object in the coordinate system corresponding to the first ultrasonic signal and a coordinate point in the middle of the target object in the coordinate system corresponding to the second ultrasonic signal is set as the target movement locus.
For example, the electronic device may connect the coordinate points of each first position map with the corresponding coordinate points of the second position map, and then use the connecting line that overlaps the most as the target motion trajectory.
S235, determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position.
In the application, the ultrasonic signal is reflected when contacting the target object, so that the contact position of the ultrasonic signal and the target object, namely the first position and the second position, can be measured according to the reflected ultrasonic signal. The contact position of each ultrasonic signal with the target object is mapped into the coordinate system, so that the outline of the target object can be approximately described.
Optionally, the determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position includes:
respectively sequencing the coordinate points corresponding to each first position and the coordinate points corresponding to each second position, and determining a first boundary coordinate point set and a second boundary coordinate point set of the target object; respectively connecting coordinate points in the first boundary coordinate point set with coordinate points in the second boundary coordinate point set by using a smooth curve to obtain a first contour and a second contour; determining the target profile based on the first profile and the second profile.
Specifically, after mapping the first position and the second position to the coordinate system, the coordinate points corresponding to each first position may be sorted, a plurality of boundary coordinate points of the target object corresponding to the first ultrasonic signal may be found, and then the plurality of boundary points may be sequentially connected by a curve or a straight line to obtain the first contour of the target object. Similarly, the coordinate points corresponding to each second position are sequenced, a plurality of boundary coordinate points of the target object corresponding to the second ultrasonic signal are found out, and then the plurality of boundary points are sequentially connected by curves or straight lines to obtain a second contour of the target object. Then, matching the first contour with the second contour, and if the matching degree is greater than or equal to a preset value, directly determining the first contour or the second contour as a target contour; and if the matching degree is smaller than the preset value, determining the contour close to the origin as the target contour.
For example, if the matching degree is smaller than the preset value, the electronic device may measure M third positions corresponding to the M third ultrasonic signals, then map the third positions into the coordinate system to obtain a third contour, and determine the target contour based on the second contour and the third contour.
And S24, judging whether the target object is the living body or not according to the target motion track and the target contour.
Specifically, after obtaining the target motion trajectory and the target contour of the target object, the target contour may be compared with a part contour image of the human body, and the part of the human body may include but is not limited to: hands, ears, eyes, nose, mouth, etc. If the target contour is matched with the contour image of a certain part of the human body, judging whether the target object is in a moving state according to the target motion track, and if the target object is in the moving state, determining that the target object is a living body.
S330, when the target object is the living body, adjusting a Specific Absorption Rate (SAR) value of the electronic equipment.
In the present application, if it is determined that the target object is a living body, it means that the distance between the target object and the electronic device is too short, and the radiation power of the electronic device is large at this distance by the user, which may affect the human body. Therefore, the radiation power of the electronic device needs to be reduced to reduce the SAR value, wherein the lower the radiation power of the electronic device and the lower the SAR energy, the lower the influence on the human body. In particular to an ultrasonic module for controlling a power module in electronic equipment to reduce the radiation power of the electronic equipment. For example, the ultrasonic module may adjust the radiation power according to a distance between the target object and the electronic device.
Specifically, if the target object is a living body and the target object moves in a direction close to the electronic device, if the radiation power of the electronic device is still maintained at the preset value set during normal communication, the radiation power of the electronic device may be reduced to reduce the SAR value thereof in order to ensure the human body safety requirement; if the target object is a living body and the target object moves away from the electronic device, the radiation power of the electronic device may be increased to improve the communication performance of the electronic device if the electronic device has reduced the radiation power to ensure the safety of the human body.
Optionally, the method further includes: when the target object is not the living body, the SAR value of the electronic equipment is adjusted to a preset value.
It can be seen that in the specific absorption rate SAR adjustment method based on ultrasonic waves provided by the present application, the electronic device determines a target distance based on the ultrasonic wave module, where the target distance is a distance between the electronic device and a target object; when the target distance is greater than or equal to the preset distance, judging whether the target object is a living body based on the ultrasonic module; and when the target object is the living body, adjusting the SAR value of the electronic device. According to the method and the device, the distance between the electronic equipment and the target object is detected by the ultrasonic module, and then when the target object is detected to be a living body, the SAR value of the electronic equipment is adjusted in real time according to the distance, so that the requirements on communication performance and human body safety are met.
It will be appreciated that the electronic device, in order to implement the above-described functions, comprises corresponding hardware and/or software modules for performing the respective functions. The present application is capable of being implemented in hardware or a combination of hardware and computer software in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, with the embodiment described in connection with the particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In this embodiment, the electronic device may be divided into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in the form of hardware. It should be noted that the division of the modules in this embodiment is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of dividing each functional module by corresponding functions, fig. 6 shows a schematic diagram of an ultrasound-based specific absorption rate SAR adjustment apparatus, as shown in fig. 6, the ultrasound-based specific absorption rate SAR adjustment apparatus 600 is applied to an electronic device including an ultrasound module, and the ultrasound-based specific absorption rate SAR adjustment apparatus 600 may include: a determination unit 601, a judgment unit 602, and an adjustment unit 603.
Among other things, determination unit 601 may be used to support the electronic device to perform S310, etc., described above, and/or other processes for the techniques described herein.
The determination unit 602 may be used to support the electronic device to perform S320, etc., described above, and/or other processes for the techniques described herein.
The adjustment unit 603 may be used to enable the electronic device to perform the above-described S330, etc., and/or other processes for the techniques described herein.
It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
The electronic device provided by the embodiment is used for executing the method for adjusting the specific absorption rate SAR based on the ultrasonic wave, so that the same effect as the implementation method can be achieved.
In case an integrated unit is employed, the electronic device may comprise a processing module, a storage module and a communication module. The processing module may be configured to control and manage actions of the electronic device, and for example, may be configured to support the electronic device to perform steps performed by the determining unit 601, the determining unit 602, and the adjusting unit 603. The memory module may be used to support the electronic device in executing stored program codes and data, etc. The communication module can be used for supporting the communication between the electronic equipment and other equipment.
The processing module may be a processor or a controller. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., a combination of one or more microprocessors, a Digital Signal Processing (DSP) and a microprocessor, or the like. The storage module may be a memory. The communication module may specifically be a radio frequency circuit, a bluetooth chip, a Wi-Fi chip, or other devices that interact with other electronic devices.
In an embodiment, when the processing module is a processor and the storage module is a memory, the electronic device according to this embodiment may be a device having the structure shown in fig. 1.
The present embodiment also provides a computer storage medium, which stores computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the above related method steps to implement the ultrasound-based specific absorption rate SAR adjustment method in the above embodiments.
The present embodiment also provides a computer program product, which when running on a computer, causes the computer to execute the relevant steps described above, so as to implement the ultrasound-based specific absorption rate SAR adjustment method in the above embodiments.
In addition, embodiments of the present application also provide an apparatus, which may be specifically a chip, a component or a module, and may include a processor and a memory connected to each other; the memory is used for storing computer execution instructions, and when the device runs, the processor can execute the computer execution instructions stored in the memory, so that the chip can execute the ultrasonic-based specific absorption rate SAR adjusting method in the above-mentioned method embodiments.
The electronic device, the computer storage medium, the computer program product, or the chip provided in this embodiment are all configured to execute the corresponding method provided above, so that the beneficial effects achieved by the electronic device, the computer storage medium, the computer program product, or the chip may refer to the beneficial effects in the corresponding method provided above, and are not described herein again.
Through the description of the foregoing embodiments, those skilled in the art will understand that, for convenience and simplicity of description, only the division of the functional modules is used for illustration, and in practical applications, the above function distribution may be completed by different functional modules as needed, that is, the internal structure of the device may be divided into different functional modules, so as to complete all or part of the functions described above.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a module or a unit may be divided into only one logic function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another apparatus, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. An SAR adjustment method based on ultrasonic waves is characterized in that the SAR adjustment method is applied to electronic equipment comprising an ultrasonic wave module, the ultrasonic wave module comprises M ultrasonic wave receiving modules and M ultrasonic wave transmitting modules, M is a positive integer, and the method comprises the following steps:
determining a target distance based on the ultrasonic module, the target distance being a distance between the electronic device and a target object;
when the target distance is less than a preset distance, judging whether the target object is a living body based on the ultrasonic module, including: respectively receiving M first ultrasonic signals and M second ultrasonic signals which are transmitted to the target object by the M ultrasonic transmitting modules through the M ultrasonic receiving modules, wherein the transmitting time difference between the first ultrasonic signals and the second ultrasonic signals is a first interval, and the M first ultrasonic signals correspond to the M second ultrasonic signals one to one; respectively calculating the flight time of the M first ultrasonic signals and the flight time of the M second ultrasonic signals to obtain M first flight time and M second flight time; determining a target contour and a target motion track of the target object according to the M first flight durations and the M second flight durations; judging whether the target object is the living body or not according to the target motion track and the target contour;
adjusting a Specific Absorption Rate (SAR) value of the electronic device when the target object is the living body;
determining a target contour and a target motion trajectory of the target object according to the M first flight durations and the M second flight durations includes: acquiring emission angles of the M ultrasonic emission modules for respectively emitting the M first ultrasonic signals and the M second ultrasonic signals to obtain M first emission angles and M second emission angles; calculating M first positions and M second positions of the target object and the electronic device based on the M first flight durations and the M second flight durations, respectively; mapping each first position and a corresponding first emission angle in the M first positions and each second position and a corresponding second emission angle in the M second positions in a coordinate system respectively, wherein the horizontal axis of the coordinate system is distance, and the vertical axis of the coordinate system is angle; determining the target motion track according to the coordinate point corresponding to the first position and the coordinate point corresponding to the second position; determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position;
the determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position includes: respectively sequencing the coordinate points corresponding to each first position and the coordinate points corresponding to each second position, and determining a first boundary coordinate point set and a second boundary coordinate point set of the target object; respectively connecting coordinate points in the first boundary coordinate point set with coordinate points in the second boundary coordinate point set by using a smooth curve to obtain a first contour and a second contour; determining the target contour based on the first contour and the second contour; matching the first contour with the second contour, and if the matching degree is greater than or equal to a preset value, determining the first contour or the second contour as the target contour;
the judging whether the target object is the living body according to the target motion track and the target contour comprises the following steps: if the target contour is matched with the contour image of any part of the human body, judging whether the target object is in a moving state or not according to the target motion track; and if the target object is in a moving state, determining that the target object is a living body.
2. The method of claim 1, wherein determining the target motion trajectory according to the coordinate point corresponding to the first location and the coordinate point corresponding to the second location comprises:
determining a first coordinate point corresponding to a median first position of the M first positions and a second coordinate point corresponding to a median second position of the M second positions;
and connecting the first coordinate point and the second coordinate point by using a smooth curve to obtain the target motion track.
3. The method of claim 1 or 2, wherein said determining a target distance based on said ultrasound module comprises:
respectively receiving M third ultrasonic signals transmitted to the periphery of the electronic equipment by the M ultrasonic transmitting modules through the M ultrasonic receiving modules;
calculating the flight durations of the M third ultrasonic signals to obtain M third flight durations;
determining the minimum third flight duration of the M third flight durations as a target flight duration;
calculating the target distance based on the target flight time.
4. The method of claim 1, further comprising:
when the target object is not the living body, the SAR value of the electronic equipment is adjusted to a preset value.
5. The utility model provides a specific absorption rate SAR adjusting device based on ultrasonic wave which characterized in that is applied to the electronic equipment including the ultrasonic wave module, the ultrasonic wave module includes M ultrasonic wave receiving module and M ultrasonic wave transmission module, M is the positive integer, the device includes:
a determination unit configured to determine a target distance based on the ultrasonic wave module, the target distance being a distance between the electronic device and a target object;
a determination unit configured to determine whether the target object is a living body based on the ultrasonic module when the target distance is less than a preset distance, including: respectively receiving M first ultrasonic signals and M second ultrasonic signals transmitted to the target object by the M ultrasonic transmitting modules through the M ultrasonic receiving modules, wherein the transmitting time difference between the first ultrasonic signals and the second ultrasonic signals is a first interval, and the M first ultrasonic signals correspond to the M second ultrasonic signals one to one; respectively calculating the flight time of the M first ultrasonic signals and the flight time of the M second ultrasonic signals to obtain M first flight time and M second flight time; determining a target contour and a target motion track of the target object according to the M first flight durations and the M second flight durations; judging whether the target object is the living body or not according to the target motion track and the target contour;
an adjustment unit configured to adjust a Specific Absorption Rate (SAR) value of the electronic device when the target object is the living body;
the judging unit is specifically configured to obtain emission angles at which the M ultrasonic emission modules respectively emit the M first ultrasonic signals and the M second ultrasonic signals, so as to obtain M first emission angles and M second emission angles, in terms of determining a target profile and a target motion trajectory of the target object according to the M first flight durations and the M second flight durations; calculating M first positions and M second positions of the target object and the electronic device respectively based on the M first flight durations and the M second flight durations; mapping each first position and a corresponding first emission angle in the M first positions and each second position and a corresponding second emission angle in the M second positions in a coordinate system respectively, wherein the horizontal axis of the coordinate system is distance, and the vertical axis of the coordinate system is angle; determining the target motion track according to the coordinate point corresponding to the first position and the coordinate point corresponding to the second position; determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position;
the determining unit, in the aspect of determining the target contour according to the coordinate point corresponding to each first position and the coordinate point corresponding to each second position, is specifically configured to sort the coordinate point corresponding to each first position and the coordinate point corresponding to each second position, and determine a first boundary coordinate point set and a second boundary coordinate point set of the target object; respectively connecting coordinate points in the first boundary coordinate point set with coordinate points in the second boundary coordinate point set by using a smooth curve to obtain a first contour and a second contour; determining the target contour based on the first contour and the second contour; matching the first contour with the second contour, and if the matching degree is greater than or equal to a preset value, determining the first contour or the second contour as the target contour;
the judging unit is specifically configured to, in the aspect of judging whether the target object is the living body according to the target motion trajectory and the target contour, judge whether the target object is in a moving state according to the target motion trajectory if the target contour matches an outline image of any part of a human body; and if the target object is in a moving state, determining that the target object is a living body.
6. An electronic device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-4.
7. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616911.7A CN113364530B (en) | 2021-06-02 | 2021-06-02 | Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616911.7A CN113364530B (en) | 2021-06-02 | 2021-06-02 | Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113364530A CN113364530A (en) | 2021-09-07 |
| CN113364530B true CN113364530B (en) | 2023-04-11 |
Family
ID=77531468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110616911.7A Active CN113364530B (en) | 2021-06-02 | 2021-06-02 | Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113364530B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8148985B2 (en) * | 2008-10-15 | 2012-04-03 | Massachusetts Institute Of Technology | Method for reducing maximum local specific absorption rate in magnetic resonance imaging |
| TW201210133A (en) * | 2010-08-31 | 2012-03-01 | Acer Inc | Portable electrical devices and methods for switching antenna |
| US9871545B2 (en) * | 2014-12-05 | 2018-01-16 | Microsoft Technology Licensing, Llc | Selective specific absorption rate adjustment |
| CN108848251A (en) * | 2018-05-15 | 2018-11-20 | 珠海格力电器股份有限公司 | Intelligence adjusts the method, apparatus and terminal device of SAR |
| NO346391B1 (en) * | 2018-10-04 | 2022-07-04 | Elliptic Laboratories As | Absorption rate detection |
| KR20210019814A (en) * | 2019-08-13 | 2021-02-23 | 삼성전자주식회사 | Electronic device for backing-off transmission power based on sar and method for operating thereof |
| CN111479011B (en) * | 2020-04-02 | 2022-01-07 | Oppo广东移动通信有限公司 | Power adjustment method, device, storage medium and electronic equipment |
-
2021
- 2021-06-02 CN CN202110616911.7A patent/CN113364530B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113364530A (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107636893B (en) | Multi-antenna communication system configured to detect objects | |
| JP7008855B2 (en) | Determination of the proximity of the transmission antenna to the human body to limit the transmission output power | |
| EP4131064A1 (en) | Gesture recognition method and related apparatus | |
| US20210401307A1 (en) | Use of body-worn radar for biometric measurements, contextual awareness and identification | |
| US20220382381A1 (en) | Multifunctional Radar Systems and Methods of Operation Thereof | |
| JP6100286B2 (en) | Gesture detection based on information from multiple types of sensors | |
| CN113038362B (en) | Ultra-wideband positioning method and system | |
| CN112261669A (en) | Network beam orientation control method and device, readable medium and electronic equipment | |
| EP3974951A1 (en) | Method and device for controlling apparatus, electronic apparatus, and storage medium | |
| EP4206900A1 (en) | Electronic device controlled on basis of sound data, and method for controlling electronic device on basis of sound data | |
| CN108233465A (en) | Wireless charging control method, flexible terminal and computer readable storage medium | |
| WO2020093278A1 (en) | Multi-antenna based gesture recognition method and device | |
| US11069958B2 (en) | Method for receiving satellite signal by adjusting resonant frequency according to medium outside electronic device and electronic device supporting same | |
| CN108494465A (en) | A kind of wave beam adjustment method and mobile terminal of smart antenna | |
| CN113364530B (en) | Specific absorption rate SAR (synthetic aperture radar) adjusting method and device based on ultrasonic waves | |
| CN108614263B (en) | Mobile terminal, position detection method and related product | |
| US11775011B2 (en) | Method for transceiving information and electronic device thereof | |
| US20200169809A1 (en) | Wearable beamforming speaker array | |
| US20240148330A1 (en) | Electronic device for measuring biometric signal and method of operating the same | |
| US20230122036A1 (en) | Electronic device for measuring electrocardiogram and operation method in electronic device | |
| CN114449638B (en) | Power adjustment method and device and mobile terminal | |
| US20230156394A1 (en) | Electronic device for sensing touch input and method therefor | |
| EP4318040A1 (en) | Electronic device using uwb signal, and method | |
| CN115015838B (en) | Positioning method and sound source positioning system | |
| US20230197264A1 (en) | Method for monitoring users and providing information, and device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |