CN117630505A - SAR detection method, SAR detection device, electronic equipment and storage medium - Google Patents
SAR detection method, SAR detection device, electronic equipment and storage medium Download PDFInfo
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Abstract
The disclosure relates to a SAR detection method, a device, an electronic device and a storage medium, wherein the method is applied to a terminal device with a folding screen, the folding screen comprises a first main body and a second main body, an SAR sensor is arranged in the first main body, and a folding state sensor is arranged in the first main body and/or the second main body, and the method comprises the following steps: acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor; determining the folding state of the folding screen according to the folding state parameters; correcting a capacitance reference value of the SAR sensor according to the capacitance detection value in response to a change in a folding state of the folding screen; and determining the SAR detection result according to the capacitance detection value and the capacitance reference value.
Description
Technical Field
The disclosure relates to the technical field of SAR detection, in particular to a SAR detection method, a SAR detection device, electronic equipment and a storage medium.
Background
In recent years, various technologies of terminal equipment are gradually improved, and user experience is greatly improved. For example, the antenna technology of the terminal equipment is continuously advanced, so that the quality of communication signals and network signals of the terminal equipment is obviously improved. However, the antenna receives and transmits signals and generates radiation energy around the terminal device, and the radiation energy has a certain adverse effect on the health of the human body, so that the terminal device can perform SAR (Specific absorption rate ) detection at present, so as to determine whether the human body is close to or in contact with the terminal device or not, so that the radiation energy is reduced when the human body is close to or in contact with the terminal device. However, in the related art, the SAR detection of the panel-shaped terminal device (i.e., the non-folding screen terminal device) is more accurate, and the SAR detection accuracy of the folding screen terminal device is poor.
Disclosure of Invention
In order to overcome the problems in the related art, embodiments of the present disclosure provide a SAR detection method, apparatus, electronic device, and storage medium, which are used to solve the drawbacks in the related art.
According to a first aspect of embodiments of the present disclosure, there is provided a SAR detection method applied to a terminal device having a folding screen, where the folding screen includes a first body and a second body, a SAR sensor is disposed in the first body, and a folding status sensor is disposed in the first body and/or the second body, and the method includes:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor;
determining the folding state of the folding screen according to the folding state parameters;
correcting a capacitance reference value of the SAR sensor according to the capacitance detection value in response to a change in a folding state of the folding screen;
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value.
In one embodiment, the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value includes:
and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
In one embodiment, the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value includes:
in response to the capacitance detection value reaching a saturation value after a change in a folded state of the folded screen, locking a capacitance difference between the capacitance detection value and the capacitance reference value, and correcting the capacitance reference value of the SAR sensor to the capacitance difference;
and releasing the lock on the capacitance difference value in response to the capacitance detection value decreasing, and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance difference value being smaller than a correction threshold value.
In one embodiment, the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value includes:
in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, maintaining a capacitance reference value of the SAR sensor unchanged;
and correcting a capacitance reference value of the SAR sensor to the capacitance detection value in response to the decrease amplitude of the capacitance detection value reaching an amplitude threshold.
In one embodiment, said correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being changed includes:
And correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being switched from the unfolded state to the closed state or from the closed state to the unfolded state.
In one embodiment, the determining the SAR detection result according to the capacitance detection value and the capacitance reference value includes:
determining that the SAR detection result is close to a human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being greater than a threshold value;
and determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
In one embodiment, further comprising:
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed.
In one embodiment, further comprising:
when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power;
and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power.
In one embodiment, the folding state sensor includes at least one of a motion sensor including at least one of an acceleration sensor and a gyroscope, and a hall sensor.
In one embodiment, the acquiring the capacitance detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor includes:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor in real time;
the step of determining the folding state of the folding screen according to the folding state parameter comprises the following steps:
and determining the folding state of the folding screen in real time according to the folding state parameters.
According to a second aspect of the embodiments of the present disclosure, there is provided a SAR detection apparatus applied to a terminal device having a folding screen, the folding screen including a first body and a second body, a SAR sensor being provided in the first body, and a folding status sensor being provided in the first body and/or the second body, the apparatus including:
the acquisition module is used for acquiring the capacitance detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor;
The state module is used for determining the folding state of the folding screen according to the folding state parameters;
the correction module is used for correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the change of the folding state of the folding screen;
and the detection module is used for determining the SAR detection result according to the capacitance detection value and the capacitance reference value.
In one embodiment, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
In one embodiment, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in a folded state of the folded screen, locking a capacitance difference between the capacitance detection value and the capacitance reference value, and correcting the capacitance reference value of the SAR sensor to the capacitance difference;
And releasing the lock on the capacitance difference value in response to the capacitance detection value decreasing, and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance difference value being smaller than a correction threshold value.
In one embodiment, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, maintaining a capacitance reference value of the SAR sensor unchanged;
and correcting a capacitance reference value of the SAR sensor to the capacitance detection value in response to the decrease amplitude of the capacitance detection value reaching an amplitude threshold.
In one embodiment, the correction module is specifically configured to:
and correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being switched from the unfolded state to the closed state or from the closed state to the unfolded state.
In one embodiment, the detection module is specifically configured to:
determining that the SAR detection result is close to a human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being greater than a threshold value;
And determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
In one embodiment, the detection module is further configured to:
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed.
In one embodiment, further comprising:
when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power;
and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power.
In one embodiment, the folding state sensor includes at least one of a motion sensor including at least one of an acceleration sensor and a gyroscope, and a hall sensor.
In one embodiment, the acquiring module specifically uses:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor in real time;
The status module is specifically configured to:
and determining the folding state of the folding screen in real time according to the folding state parameters.
According to a third aspect of embodiments of the present disclosure, there is provided an electronic device comprising a memory for storing computer instructions executable on a processor for implementing the SAR detection method of the first aspect when the computer instructions are executed.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the first aspect.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
according to the SAR detection method, the capacitor detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor are acquired, so that the folding state of the folding screen can be determined according to the folding state parameter, under the condition that the folding state of the folding screen is changed, the capacitor reference value of the SAR sensor is corrected according to the capacitor detection value, and finally the SAR detection result is determined according to the capacitor detection value and the corrected capacitor reference value. Because the capacitance reference value is corrected along with the change of the state of the folding screen, the capacitance reference value is adapted to the state of the folding screen, and therefore the SAR detection result determined based on the capacitance reference value and the capacitance detection value acquired by the SAR sensor can be accurate in any state of the folding screen. If the method is applied to the folding screen terminal equipment to control the radiation energy, the radiation energy can be reduced when a human body approaches or contacts the terminal equipment, so that the influence of the radiation energy on the health of a user is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of a SAR detection method shown in an exemplary embodiment of the present disclosure;
fig. 2 is a schematic structural view of a terminal device according to an exemplary embodiment of the present disclosure;
fig. 3A is a diagram showing a change situation of each capacitance value in a scenario in which a folding screen of a terminal device is switched from an unfolded state to a closed state in the related art;
fig. 3B is a diagram illustrating a change situation of each capacitance value in a scenario in which a folding screen of a terminal device is switched from an unfolded state to a closed state according to an exemplary embodiment of the present disclosure;
fig. 3C is a diagram illustrating a change situation of each capacitance value in a scenario in which a folding screen of a terminal device is switched from an unfolded state to a closed state according to another exemplary embodiment of the present disclosure;
fig. 4 is a schematic structural view of a SAR detection apparatus shown in an exemplary embodiment of the present disclosure;
fig. 5 is a block diagram of an electronic device shown in an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
Terminal equipment such as smart phones can use SAR sensors to finish SAR detection. The SAR sensor of the terminal equipment comprises an SAR chip and a section of metal connected with the chip, the section of metal can be a section of metal of a metal frame of the terminal equipment, objects with larger dielectric constants such as human bodies, metal and the like can cause capacitance value change of the section of metal, and the terminal equipment can determine whether the objects such as human bodies, metal and the like are close or not based on the capacitance value change. However, the change of the capacitance value of the SAR detection is also caused when the state of the folding screen terminal equipment is switched, and the terminal equipment cannot distinguish the change of the capacitance value caused by the state switching and the change of the capacitance value caused by the relative position of the human body and the terminal equipment, so that the SAR detection of the folding screen terminal equipment is inaccurate.
Based on this, in a first aspect, at least one embodiment of the present disclosure provides a SAR detection method, referring to fig. 1, which shows a flow of the method, including steps S101 to S104.
The method can be applied to terminal equipment with a folding screen, wherein the folding screen comprises a first main body and a second main body, an SAR sensor is arranged in the first main body, and a folding state sensor is arranged in the first main body and/or the second main body.
The setting position of the SAR sensor may be a position as shown in fig. 2. Fig. 2 shows the rear side of the folded screen terminal device in an unfolded state, and as can be seen from fig. 2, (the metal of) the SAR sensor is formed by the metal of the lower end of the rim in the first body or the second body.
Wherein the folding state sensor includes at least one of a motion sensor including at least one of an acceleration sensor and a gyroscope and a hall sensor. Illustratively, the first body and the second body are each provided with a hall sensor.
In step S101, a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor are acquired.
The SAR sensor can collect capacitance detection values in real time in the starting state of the terminal equipment, and the folding state sensor can collect folding state parameters in real time in the starting state of the terminal equipment. Therefore, in the step, the capacitance detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor can be acquired in real time.
When the folding state sensors are multiple, each folding state sensor collects corresponding folding state parameters. The acceleration sensor collects angular velocity of the terminal device, the gyroscope collects angular velocity of the terminal device, and the hall sensor collects magnetic field data.
In step S102, a folding state of the folding screen is determined according to the folding state parameter.
The state of the folding screen can be determined by selecting a corresponding folding state determining algorithm according to the type of the folding state parameter. As for the folding state determination algorithm corresponding to the various folding state parameters, an algorithm in the related art may be adopted.
For example, the angle between the first body and the second body may be determined according to the folding state parameter, and then the state of the folding screen may be determined according to the angle between the first body and the second body.
The folded state of the folding screen includes an unfolded state, a closed state, and other states in which the first body and the second body are at a specific angle.
It can be understood that if the folding status sensor acquires the folding status parameter in real time, and the step S101 acquires the folding status parameter acquired by the folding status sensor in real time, the folding status of the folding screen may be determined in real time according to the folding status parameter in this step.
In step S103, in response to a change in the folded state of the folding screen, a capacitance reference value of the SAR sensor is corrected according to the capacitance detection value.
The folding state of the folding screen in this step is changed, and the folding state of the folding screen may be switched from the unfolded state to the closed state or from the closed state to the unfolded state. That is, in this step, the capacitance reference value of the SAR sensor is corrected according to the capacitance detection value in response to switching of the folded state of the folded screen from the unfolded state to the closed state or from the closed state to the unfolded state.
In one possible embodiment (this embodiment will be referred to as a first embodiment hereinafter), the capacitance reference value of the SAR sensor may be corrected to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
When the capacitance detection value reaches the maximum value of the identifiable range, the objective capacitance value on the SAR sensor continues to rise, and the capacitance detection value is not raised any more but is kept at the maximum value of the identifiable range. The maximum value of the identifiable range is the saturation value.
The saturation value may be preset, and may be set according to the degree to which the user approaches the terminal device, for example, a capacitance detection value when the user holds the terminal device with the folding screen unfolded is set as the saturation value. Thus when the capacitance detection value reaches the saturation value, it indicates that the proximity of the user to the terminal device has reached a level corresponding to the saturation value, for example that the user is holding the terminal device.
The fact that the capacitance detection value does not reach the saturation value after the folding state of the folding screen is changed indicates that the approach degree of the user and the terminal equipment does not reach the degree corresponding to the saturation value, namely the human body of the user does not influence the capacitance detection value. In this case, the change of the folding state of the folding screen causes the change of the capacitance detection value, for example, the switching from the closed state to the open state causes the decrease of the capacitance detection value, and the switching from the open state to the closed state causes the increase of the capacitance detection value. The change of the capacitance detection value can lead to the change of a capacitance difference value between the capacitance detection value and a capacitance reference value, and the capacitance difference value is an index for judging the approach degree of a human body and terminal equipment; under the condition that the proximity degree of a human body and the terminal equipment is not changed, the change of the capacitance difference value caused by the change of the folding state of the folding screen is interference to SAR detection results (the proximity degree of the human body and the terminal equipment), so that the capacitance reference value is corrected to be the capacitance detection value in the step, the interfered capacitance difference value is restored to a value before interference, the interference of the folding state change of the folding screen to SAR detection is eliminated, and the SAR detection accuracy is ensured.
In another possible embodiment (this embodiment will be referred to as a second embodiment hereinafter), the capacitance reference value of the SAR sensor may be kept unchanged in response to the capacitance detection value reaching a saturation value after the folding state of the folding screen is changed; next, in response to the magnitude of the decrease in the capacitance detection value reaching a magnitude threshold, a capacitance reference value of the SAR sensor is corrected to the capacitance detection value.
The capacitance detection value reaches a saturation value after the folding state of the folding screen is changed, which means that the approach degree of the user and the terminal equipment reaches the degree corresponding to the saturation value, that is, the human body of the user has influence on the capacitance detection value. In this case, since the capacitance detection value is affected by the human body of the user, the capacitance reference value cannot be corrected directly in the manner in the first embodiment to eliminate the interference of the folding state change of the folding screen on the SAR detection. When the folding state of the folding screen is maintained in a certain stable state after being changed, the human body which is in contact with or close to the terminal equipment is regarded as leaving the terminal equipment, namely the influence of the human body on the capacitance detection value is removed, and the situation is the same as that of the first embodiment, so that the capacitance reference value can be corrected in the same way as that of the first embodiment, the capacitance difference value interfered by the change of the folding state is restored to a value before the interference, the interference of the change of the folding state of the folding screen on SAR detection is eliminated, and the accuracy of SAR detection is ensured.
In still another possible embodiment (this embodiment will be referred to as a third embodiment hereinafter), a capacitance difference value between the capacitance detection value and the capacitance reference value may be locked in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, and the capacitance reference value of the SAR sensor may be corrected to the capacitance difference value; next, in response to the capacitance detection value decreasing, the lock on the capacitance difference value is released, and in response to the capacitance difference value being smaller than a correction threshold value, a capacitance reference value of the SAR sensor is corrected to the capacitance detection value.
The capacitance detection value reaches a saturation value after the folding state of the folding screen is changed, which means that the approach degree of the user and the terminal equipment reaches the degree corresponding to the saturation value, that is, the human body of the user has influence on the capacitance detection value. In this case, since the capacitance detection value is affected by the human body of the user, the capacitance reference value cannot be corrected directly in the manner in the first embodiment to eliminate the interference of the folding state change of the folding screen on the SAR detection.
In order to facilitate judging whether a human body in contact with or approaching the terminal device leaves the terminal device by the capacitance difference between the capacitance detection value and the capacitance reference value, the capacitance reference value may be corrected to be the capacitance difference, that is, the capacitance reference value is increased; however, the capacitance reference value is increased to decrease the capacitance difference value, and the decrease of the capacitance difference value may cause the terminal device to determine that the SAR detection result is not close to the human body, but in a practical situation, the terminal device is close to the human body, so that the capacitance difference value may be locked before the capacitance reference value is increased, thereby avoiding the SAR detection error.
When the capacitance detection value starts to drop, it is possible that a human body in contact with or approaching the terminal device starts to leave the terminal device, so that the locking of the capacitance difference value is released, and whether the human body has left the terminal device is further determined according to the change of the capacitance difference value, namely, when the capacitance difference value is greater than or equal to a correction threshold value (for example, 0), the human body is determined not to leave the terminal device, and when the capacitance difference value is smaller than the correction threshold value, the human body is determined to have left the terminal device; after the human body is determined to leave the terminal device, that is, the influence of the human body on the capacitance detection value is removed, the situation at this time is the same as that in the first embodiment, so that the capacitance reference value can be corrected in the same manner as in the first embodiment, the capacitance difference value interfered by the folding state change is restored to the value before interference, that is, the interference of the folding state change of the folding screen on SAR detection is eliminated, and the accuracy of SAR detection is ensured.
In step S104, the SAR detection result is determined according to the capacitance detection value and the capacitance reference value.
Illustratively, responsive to a capacitance difference between the capacitance detection value and the capacitance reference value being greater than a threshold value, determining that the SAR detection result is near a human body; and determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
It is understood that the SAR detection result may be determined according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed. Illustratively, responsive to a capacitance difference between the capacitance detection value and the capacitance reference value being greater than a threshold value, determining that the SAR detection result is near a human body; and determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
In addition, when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power; and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power. That is, when the terminal device is approached by a human body, the signal receiving and transmitting power of the antenna is reduced, so that the radiation energy around the terminal device is reduced, and the influence of the radiation energy on the health of the user is reduced.
The following describes the effect of the present embodiment more specifically, taking the case of switching the folding screen from the unfolded state to the closed state as an example, with reference to fig. 3A to 3C. The abscissa of the coordinate system in each figure is time, the ordinate is capacitance value, and a detection line for representing the capacitance detection value acquired by the SAR sensor, a reference line for representing a capacitance reference value, a difference line for representing the capacitance difference value between the capacitance detection value and the capacitance reference value and a threshold line for representing a threshold value are arranged in the coordinate system.
Referring to fig. 3A, a situation of changing each capacitance value in a scenario in which a folding screen of a terminal device is switched from an unfolded state to a closed state in the related art is shown. As can be seen from fig. 3A, when the time is from t0 to t1, the terminal device is in free space, the folding screen is in an unfolded state, and there are no human body, metal and other objects around, so that the capacitance detection value is equal to the capacitance reference value, and the capacitance difference value is always 0; when the time is t1 to t2, the hand of the user gradually approaches the terminal equipment, so that the detection value gradually increases until the detection value reaches the maximum and remains unchanged when the user contacts the terminal equipment, and correspondingly, the capacitance difference value gradually increases to exceed the threshold value, and the terminal equipment can judge that the SAR detection result is that the human body approaches; when the time is from t2 to t3, the hand of the user gradually gets away from the terminal equipment, so that the detection value gradually decreases, the detection value is recovered to be equal to the reference value of the capacitor and kept unchanged until the user completely leaves the terminal equipment, and correspondingly, the capacitance difference value is gradually decreased to be lower than the threshold value, and at the moment, the terminal equipment can judge that the SAR detection result is that the human body approach does not exist; when the time is t3 to t4, the folding screen is switched from an unfolding state to a closing state, and as the metal frames of the other half of the folding screen are gradually close, the detection value is gradually increased until the detection value reaches the maximum and remains unchanged when the folding screen is completely closed, and the corresponding capacitance difference value is gradually increased to exceed a threshold value, and at the moment, the terminal equipment can judge that the SAR detection result is that the human body is close; based on the detection result, when the folding screen is closed, the terminal equipment always controls the signal receiving and transmitting power of the antenna to be kept in a low state.
Referring to fig. 3B, the change of each capacitance value in the case where the folding screen of the terminal device is switched from the unfolded state to the closed state in the first embodiment is shown. As can be seen from fig. 3B, when the time is from t0 to t1, the terminal device is in free space, the folding screen is in an unfolded state, and there are no human body, metal and other objects around, so that the capacitance detection value is equal to the capacitance reference value, and the capacitance difference value is always 0; when the time is t1 to t2, the folding screen is switched from an unfolding state to a closing state, the detection value is gradually increased as the metal frames of the other half of the folding screen are gradually close to each other until the detection value reaches the maximum value and remains unchanged when the folding screen is completely closed, and the reference value is corrected to the detection value as the detection value after the folding state of the folding screen is changed and the detection value does not reach the saturation value, so that the capacitance difference value is always kept to 0; when the time is t2 to t3, the folding screen is kept in a closed state, the terminal equipment is in a free space, and the surrounding of the terminal equipment is free of objects such as human bodies, metals and the like, so that the capacitance detection value is equal to the capacitance reference value, and the capacitance difference value is always 0; when the time is t3 to t4, the hand of the user gradually approaches the terminal equipment, so that the detection value gradually increases until the detection value reaches the maximum and remains unchanged when the user keeps a certain distance from the terminal equipment, and correspondingly, the capacitance difference value gradually increases to exceed the threshold value, and at the moment, the terminal equipment can judge that the SAR detection result is that the human body approaches. As can be seen from comparing fig. 3 and fig. 4, the correction method of the first embodiment can avoid the switching of the folding state of the folding screen from interfering with SAR detection, and avoid the control error of the signal receiving and transmitting power of the antenna caused by the SAR detection error.
Referring to fig. 3C, the change of each capacitance value in the case that the folding screen of the terminal device is switched from the unfolded state to the closed state in the third embodiment is shown. As can be seen from fig. 3C, when the time is t0, the terminal device is in free space, the folding screen is in an unfolded state, and there are no human body, metal and other objects around, so that the capacitance detection value is equal to the capacitance reference value, and the capacitance difference value is always 0; when the time is from t0 to t1, the hand of the user gradually approaches the terminal equipment, so that the detection value gradually increases until the detection value reaches the saturation value and remains unchanged when the user contacts the terminal equipment, and correspondingly, the capacitance difference value gradually increases to exceed the threshold value, and the terminal equipment can judge that the SAR detection result is that the human body approaches; when the time is t1 to t2, the folding screen is switched from the unfolding state to the closing state, the detection value is not increased because the detection value reaches the saturation value, the capacitance difference is not increased, after the folding screen is switched to the closing state, the capacitance difference is locked, the reference value is corrected to be the capacitance difference, and at the moment, the capacitance difference is still larger than the threshold value, so that the terminal equipment continuously judges that the SAR detection result is that the human body is approaching; when the time is from t2 to t3, the hand of the user gradually leaves the terminal equipment, so that the detection value gradually decreases until the detection value reaches a certain value (the value is larger than the detection value when t0, and the difference value of the detection value and the detection value is caused by the change of the folding state of the folding screen) when the user and the terminal equipment completely leave, the detection value is unchanged, the locking of the capacitance difference value is released when the detection value starts to decline, so that the capacitance difference value can decline rapidly and continues to decline along with the decline of the detection value until the capacitance difference value is smaller than a correction threshold (0), so that the reference value is corrected to the detection value, so that the capacitance difference value is 0, and then the terminal equipment updates the SAR detection result to be that the human body approach does not exist; when the time is t3 to t4, the hand of the user gradually approaches the terminal equipment, so that the detection value gradually increases until the detection value reaches the maximum and remains unchanged when the user keeps a certain distance from the terminal equipment, and correspondingly, the capacitance difference value gradually increases to exceed the threshold value, and at the moment, the terminal equipment can judge that the SAR detection result is that the human body approaches.
According to the SAR detection method, the capacitor detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor are acquired, so that the folding state of the folding screen can be determined according to the folding state parameter, under the condition that the folding state of the folding screen is changed, the capacitor reference value of the SAR sensor is corrected according to the capacitor detection value, and finally the SAR detection result is determined according to the capacitor detection value and the corrected capacitor reference value. Because the capacitance reference value is corrected along with the change of the state of the folding screen, the capacitance reference value is adapted to the state of the folding screen, and therefore the SAR detection result determined based on the capacitance reference value and the capacitance detection value acquired by the SAR sensor can be accurate in any state of the folding screen. If the method is applied to the folding screen terminal equipment to control the radiation energy, the radiation energy can be reduced when a human body approaches or contacts the terminal equipment, so that the influence of the radiation energy on the health of a user is reduced.
According to a second aspect of the embodiments of the present disclosure, there is provided a SAR detection device applied to a terminal device having a folding screen, where the folding screen includes a first body and a second body, a SAR sensor is disposed in the first body, and a folding status sensor is disposed in the first body and/or the second body, referring to fig. 4, the device includes:
An acquisition module 401, configured to acquire a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor;
a state module 402, configured to determine a folding state of the folding screen according to the folding state parameter;
a correction module 403, configured to correct a capacitance reference value of the SAR sensor according to the capacitance detection value in response to a change in a folding state of the folding screen;
and the detection module 404 is configured to determine the SAR detection result according to the capacitance detection value and the capacitance reference value.
In some embodiments of the disclosure, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
In some embodiments of the disclosure, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in a folded state of the folded screen, locking a capacitance difference between the capacitance detection value and the capacitance reference value, and correcting the capacitance reference value of the SAR sensor to the capacitance difference;
And releasing the lock on the capacitance difference value in response to the capacitance detection value decreasing, and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance difference value being smaller than a correction threshold value.
In some embodiments of the disclosure, the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, maintaining a capacitance reference value of the SAR sensor unchanged;
and correcting a capacitance reference value of the SAR sensor to the capacitance detection value in response to the decrease amplitude of the capacitance detection value reaching an amplitude threshold.
In some embodiments of the present disclosure, the correction module is specifically configured to:
and correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being switched from the unfolded state to the closed state or from the closed state to the unfolded state.
In some embodiments of the present disclosure, the detection module is specifically configured to:
determining that the SAR detection result is close to a human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being greater than a threshold value;
And determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
In some embodiments of the present disclosure, the detection module is further to:
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed.
In some embodiments of the present disclosure, a power adjustment module is further included for:
when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power;
and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power.
In some embodiments of the present disclosure, the folding state sensor includes at least one of a motion sensor including at least one of an acceleration sensor and a gyroscope, and a hall sensor.
In some embodiments of the disclosure, the obtaining module specifically uses:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor in real time;
The status module is specifically configured to:
and determining the folding state of the folding screen in real time according to the folding state parameters.
The specific manner in which the various modules perform the operations in relation to the apparatus of the above embodiments has been described in detail in relation to the embodiments of the method of the first aspect and will not be described in detail here.
In accordance with a third aspect of embodiments of the present disclosure, reference is made to fig. 5, which schematically illustrates a block diagram of an electronic device. For example, the apparatus 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like.
Referring to fig. 5, an apparatus 500 may include one or more of the following components: a processing component 502, a memory 504, a power supply component 506, a multimedia component 508, an audio component 510, an input/output (I/O) interface 512, a sensor component 514, and a communication component 516.
The processing component 502 generally controls overall operation of the apparatus 500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing element 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 502 can include one or more modules that facilitate interactions between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.
Memory 504 is configured to store various types of data to support operations at device 500. Examples of such data include instructions for any application or method operating on the apparatus 500, contact data, phonebook data, messages, pictures, videos, and the like. The memory 504 may be implemented by any type or combination of volatile or nonvolatile memory devices such as static random access memory (SARM), 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 disk.
The power component 506 provides power to the various components of the device 500. The power components 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 500.
The multimedia component 508 includes a screen between the device 500 and the user that provides an output interface. 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 input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia component 508 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the apparatus 500 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 510 is configured to output and/or input audio signals. For example, the audio component 510 includes a Microphone (MIC) configured to receive external audio signals when the device 500 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 504 or transmitted via the communication component 516. In some embodiments, the audio component 510 further comprises a speaker for outputting audio signals.
The I/O interface 512 provides an interface between the processing component 502 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 514 includes one or more sensors for providing status assessment of various aspects of the apparatus 500. For example, the sensor assembly 514 may detect the on/off state of the device 500, the relative positioning of the components, such as the display and keypad of the device 500, the sensor assembly 514 may also detect a change in position of the device 500 or a component of the device 500, the presence or absence of user contact with the device 500, the orientation or acceleration/deceleration of the device 500, and a change in temperature of the device 500. The sensor assembly 514 may also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 516 is configured to facilitate communication between the apparatus 500 and other devices in a wired or wireless manner. The apparatus 500 may access a wireless network based on a communication standard, such as WiFi,2G or 3G,4G or 5G, or a combination thereof. In one exemplary embodiment, the communication part 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 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 apparatus 500 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, microcontrollers, microprocessors, or other electronic elements for performing the power supply methods of electronic devices described above.
In a fourth aspect, the present disclosure also provides, in an exemplary embodiment, a non-transitory computer-readable storage medium, such as memory 504, comprising instructions executable by processor 520 of apparatus 500 to perform the method of powering an electronic device described above. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
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 application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within 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 is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (22)
1. The SAR detection method is characterized by being applied to a terminal device with a folding screen, wherein the folding screen comprises a first main body and a second main body, an SAR sensor is arranged in the first main body, and a folding state sensor is arranged in the first main body and/or the second main body, and the method comprises the following steps:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor;
Determining the folding state of the folding screen according to the folding state parameters;
correcting a capacitance reference value of the SAR sensor according to the capacitance detection value in response to a change in a folding state of the folding screen;
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value.
2. The SAR detection method of claim 1, wherein the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value comprises:
and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
3. The SAR detection method of claim 1, wherein the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value comprises:
in response to the capacitance detection value reaching a saturation value after a change in a folded state of the folded screen, locking a capacitance difference between the capacitance detection value and the capacitance reference value, and correcting the capacitance reference value of the SAR sensor to the capacitance difference;
and releasing the lock on the capacitance difference value in response to the capacitance detection value decreasing, and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance difference value being smaller than a correction threshold value.
4. The SAR detection method of claim 1, wherein the correcting the capacitance reference value of the SAR sensor according to the capacitance detection value comprises:
in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, maintaining a capacitance reference value of the SAR sensor unchanged;
and correcting a capacitance reference value of the SAR sensor to the capacitance detection value in response to the decrease amplitude of the capacitance detection value reaching an amplitude threshold.
5. The SAR detection method according to any one of claims 2 to 4, wherein correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to a change in the folded state of the folded screen, comprises:
and correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being switched from the unfolded state to the closed state or from the closed state to the unfolded state.
6. The SAR detection method of claim 1, wherein the determining the SAR detection result from the capacitance detection value and the capacitance reference value comprises:
Determining that the SAR detection result is close to a human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being greater than a threshold value;
and determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
7. The SAR detection method of claim 1, further comprising:
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed.
8. The SAR detection method according to claim 6 or 7, further comprising:
when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power;
and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power.
9. The SAR detection method of claim 6 or 7, wherein the folded state sensor comprises at least one of a motion sensor comprising at least one of an acceleration sensor and a gyroscope, and a hall sensor.
10. The SAR detection method of claim 1, wherein the acquiring the capacitance detection value acquired by the SAR sensor, and the folding state parameter acquired by the folding state sensor, comprises:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor in real time;
the step of determining the folding state of the folding screen according to the folding state parameter comprises the following steps:
and determining the folding state of the folding screen in real time according to the folding state parameters.
11. A SAR detection device, characterized in that it is applied to a terminal device having a folding screen, the folding screen comprises a first body and a second body, a SAR sensor is provided in the first body, and a folding status sensor is provided in the first body and/or the second body, the device comprising:
the acquisition module is used for acquiring the capacitance detection value acquired by the SAR sensor and the folding state parameter acquired by the folding state sensor;
the state module is used for determining the folding state of the folding screen according to the folding state parameters;
the correction module is used for correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the change of the folding state of the folding screen;
And the detection module is used for determining the SAR detection result according to the capacitance detection value and the capacitance reference value.
12. The SAR detection apparatus of claim 11, wherein the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance detection value not reaching a saturation value after the folding state of the folding screen is changed.
13. The SAR detection apparatus of claim 11, wherein the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in a folded state of the folded screen, locking a capacitance difference between the capacitance detection value and the capacitance reference value, and correcting the capacitance reference value of the SAR sensor to the capacitance difference;
and releasing the lock on the capacitance difference value in response to the capacitance detection value decreasing, and correcting the capacitance reference value of the SAR sensor to the capacitance detection value in response to the capacitance difference value being smaller than a correction threshold value.
14. The SAR detection apparatus of claim 11, wherein the correction module is configured to, when correcting the capacitance reference value of the SAR sensor according to the capacitance detection value, specifically:
in response to the capacitance detection value reaching a saturation value after a change in the folded state of the folded screen, maintaining a capacitance reference value of the SAR sensor unchanged;
and correcting a capacitance reference value of the SAR sensor to the capacitance detection value in response to the decrease amplitude of the capacitance detection value reaching an amplitude threshold.
15. The SAR detection apparatus of any one of claims 12 to 14, wherein the correction module is specifically configured to:
and correcting the capacitance reference value of the SAR sensor according to the capacitance detection value in response to the folding state of the folding screen being switched from the unfolded state to the closed state or from the closed state to the unfolded state.
16. The SAR detection device of claim 11, wherein the detection module is specifically configured to:
determining that the SAR detection result is close to a human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being greater than a threshold value;
And determining that the SAR detection result is not close to the human body in response to the capacitance difference value between the capacitance detection value and the capacitance reference value being not greater than the threshold value.
17. The SAR detection device of claim 11, wherein the detection module is further configured to:
and determining the SAR detection result according to the capacitance detection value and the capacitance reference value in response to the folding state of the folding screen not being changed.
18. The SAR detection apparatus of claim 16 or 17, further comprising:
when the SAR detection result is close to a human body, adjusting the signal receiving and transmitting power of an antenna of the terminal equipment to be first power;
and under the condition that the SAR detection result is not close to a human body, adjusting the signal receiving and transmitting power of the antenna of the terminal equipment to be second power, wherein the first power is smaller than the second power.
19. The SAR detection apparatus of claim 16 or 17, wherein the folded state sensor comprises at least one of a motion sensor comprising at least one of an acceleration sensor and a gyroscope, and a hall sensor.
20. The SAR detection apparatus of claim 11, wherein the acquisition module is configured to:
acquiring a capacitance detection value acquired by the SAR sensor and a folding state parameter acquired by the folding state sensor in real time;
the status module is specifically configured to:
and determining the folding state of the folding screen in real time according to the folding state parameters.
21. An electronic device comprising a memory, a processor for storing computer instructions executable on the processor for implementing the SAR detection method of any one of claims 1-10 when the computer instructions are executed.
22. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method of any one of claims 1 to 10.
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