CN111865346A - Mobile terminal and control method - Google Patents

Abstract

The present disclosure provides a mobile terminal and a control method, belonging to the field of electronic technology. The device includes: a processor, a coil and a SAR processing unit; the coil is connected to the SAR processing unit; the SAR processing unit is connected to the processor; the coil is a speaker coil or an NFC coil; Capacitive coupling with human body parts within the sensing range to generate sensing signals, and sending the sensing signals to the SAR processing unit; the SAR processing unit is configured to send control signals to the processor when receiving the sensing signals signal; the processor is configured to reduce the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal. The embodiment of the present disclosure provides a mobile terminal that uses the existing coil of the mobile terminal as the sensing element of the SAR sensor, without adding a metal coating separately, saving cost, saving a large space for the mobile terminal, and improving flexibility sex.

Description

Mobile terminal and control method

technical field

The present disclosure relates to the field of electronic technologies, and in particular, to a mobile terminal and a control method.

Background technique

SAR (Specific Absorption Rate, specific absorption rate) refers to the energy absorbed by a unit mass of material per unit time of electromagnetic radiation of a mobile terminal, and is an important parameter for measuring the influence of electromagnetic radiation of a mobile terminal on the human body. The lower the SAR, the less electromagnetic radiation energy the human body absorbs, and the higher the SAR, the more electromagnetic radiation energy the human body absorbs. The current mobile terminal is equipped with a SAR sensor to sense the human body parts approaching the mobile terminal, so as to achieve the purpose of reducing SAR.

1, the mobile terminal includes a SAR sensor 101 and a processor 102, the SAR sensor 101 includes a SAR processing unit 1011 and a metal coating 1012, the SAR processing unit 1011 is connected with the metal coating 1012, and the metal coating 1012 is located on the inner surface of the mobile terminal , and the SAR processing unit 1011 is connected to the processor 102 . The metal coating 1012 is used as the sensing element of the SAR sensor 101, and is used for capacitive coupling with the body part within the sensing range to generate a sensing signal, and send the sensing signal to the SAR processing unit 1011. When the SAR processing unit 1011 receives the sensing signal, A control signal is sent to the processor 102, where the control signal is used to instruct the processor 102 to reduce the electromagnetic radiation power of the mobile terminal, thereby reducing the SAR of the mobile terminal. However, the above-mentioned metal coating needs to occupy a large space of the mobile terminal, and also consumes too much cost.

SUMMARY OF THE INVENTION

The present disclosure provides a mobile terminal and a control method, which can overcome the problems existing in the related art. The technical solutions are as follows:

According to the first aspect provided by the embodiments of the present disclosure, a mobile terminal is provided, and the mobile terminal includes: a processor, a coil, and a SAR processing unit;

the coil is connected with the SAR processing unit;

the SAR processing unit is connected to the processor;

The coil is a speaker coil or an NFC coil;

The coil is used for capacitive coupling with the body part within the sensing range to generate an induction signal, and send the induction signal to the SAR processing unit;

The SAR processing unit is configured to send a control signal to the processor when receiving the sensing signal;

The processor is configured to reduce the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal.

In a possible implementation manner, the mobile terminal further includes: a decoupling circuit, the coil is connected to the decoupling circuit, and the decoupling circuit is connected to the SAR processing unit;

the coil is used for sending a signal to the decoupling circuit, the signal includes the inductive signal and the noise signal;

The decoupling circuit is used for removing the noise signal, and sending the sensing signal to the SAR processing unit.

In another possible implementation manner, the decoupling circuit is an active filter circuit, an LC filter circuit, an L-shaped filter circuit or a π-shaped filter circuit.

In another possible implementation manner, the mobile terminal further includes a casing, and the processor and the SAR processing unit are located inside the casing;

The coil is located inside or on the surface of the housing.

In another possible implementation manner, the maximum sensing distance of the sensing range is between 5 mm and 35 mm.

In another possible implementation manner, the maximum sensing distance of the sensing range is 30 mm.

According to a second aspect provided by the embodiments of the present disclosure, a method for controlling a mobile terminal is provided, which is applied to the mobile terminal described in the first aspect, and the method includes:

The coil is capacitively coupled with the body part within the sensing range to generate an induction signal, and send the induction signal to the SAR processing unit;

When the SAR processing unit receives the sensing signal, it sends a control signal to the processor;

When receiving the control signal, the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal.

In a possible implementation, the method further includes:

The processor sends a voice signal to the speaker coil, and the speaker coil plays the voice signal.

In another possible implementation, the method further includes:

the processor sends a first communication signal to the NFC coil;

When the NFC coil receives the first communication signal, it transmits a first NFC signal corresponding to the first communication signal; or,

The NFC coil receives a second NFC signal transmitted by an NFC communication device within the sensing range, and sends a second communication signal corresponding to the second NFC signal to the processor.

In another possible implementation manner, the mobile terminal further includes: a decoupling circuit, the coil is connected to the decoupling circuit, and the decoupling circuit is connected to the SAR processing unit; The processing unit sends the sensing signal, including:

the coil sends a signal to the decoupling circuit, the signal including the inductive signal and the noise signal;

The decoupling circuit removes the noise signal and sends the sensing signal to the SAR processing unit.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure include at least:

In the mobile terminal provided by the embodiments of the present disclosure, a coil is capacitively coupled with a body part within the sensing range to generate an induction signal, and a control signal is sent to a processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal, thereby reducing the mobile terminal. SAR. The embodiment of the present disclosure provides a mobile terminal that uses the existing coil of the mobile terminal as the sensing element of the SAR sensor, without adding a metal coating separately, saving cost, and saving a large space for the mobile terminal, and the saved The space can reduce the size of the mobile terminal or be used to configure other electronic components, improving flexibility.

In the embodiment of the present disclosure, the coil sends a signal to the decoupling circuit, the signal includes an induction signal and a noise signal, the decoupling circuit removes the noise signal, sends the induction signal to the SAR processing unit, and the SAR processing unit receives the induction signal and sends the control signal to the processor , the processor reduces the electromagnetic radiation power of the mobile terminal according to the received control signal. By arranging a decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the body part within the induction range can be accurately identified.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment;

FIG. 2 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment;

3 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment;

4 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment;

5 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment;

Fig. 6 is a flow chart of a method for controlling a mobile terminal according to an exemplary embodiment.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

FIG. 2 is a schematic structural diagram of a mobile terminal according to an exemplary embodiment, and the mobile terminal may be various types of devices such as a mobile phone, a tablet computer, or a notebook computer. As shown in FIG. 2 , the mobile terminal includes a processor 201 , a coil 202 and a SAR processing unit 203 .

The coil 202 is connected to the SAR processing unit 203 , and the SAR processing unit 203 is connected to the processor 201 .

The coil 202 is a wire winding formed by surrounding one or more wires. The coil 202 is conductive and can be made of metal or other conductive materials. The SAR processing unit 203 may be in a chip or other form, and the SAR processing unit 203 can sense body parts near the mobile terminal through the connected coil 202 and report it to the processor 201 .

When the body part is close to the coil 202 , due to the action of the electric field of the body, a coupling capacitance will be formed between the body part and the coil 202 , and a signal will be generated between the body part and the coil 202 .

Therefore, when the body part enters the sensing range of the coil 202, the coil 202 capacitively couples with the body part within the sensing range, generates an induction signal, and sends the induction signal to the SAR processing unit 203. The induction signal is used to indicate that the body part enters When the sensing range of the coil 202 is reached, the SAR processing unit 203 sends a control signal to the processor 201 when receiving the sensing signal, and the control signal is used to notify the processor 201 that a body part has entered the sensing range of the coil 202 . Then, when the processor 201 receives the control signal, it reduces the electromagnetic radiation power of the mobile terminal according to the control signal, so that the SAR of the mobile terminal is small enough to meet the SAR regulations of relevant departments and reduce the impact of electromagnetic radiation on the human body.

The process of generating the induction signal by the coil 202 may include: when the body part enters the induction range of the coil 202, the coil 202 performs capacitive coupling with the body part within the induction range, and the coil 202 senses the change in capacitance. When the threshold is preset, an induction signal is generated, and a power back-off process can be triggered subsequently based on the induction signal to reduce the electromagnetic radiation power of the mobile terminal.

The sensing range of the coil 202 has a maximum sensing distance. For example, the maximum sensing distance of the sensing range of the coil 202 is between 5 mm and 35 mm, for example, the maximum sensing distance is 30 mm.

Wherein, the mobile terminal may further include a casing, the casing is used to protect and carry the electronic components included in the mobile terminal, the processor 201 and the SAR processing unit 203 are located inside the casing, the coil 202 is located inside the surface of the casing, or On the surface of the casing, for example, the coil 202 is located at a position below the inner side of the back of the mobile terminal.

Wherein, the mobile terminal further includes an antenna unit, and the antenna unit is used for transmitting communication signals or receiving communication signals sent by other devices by performing electromagnetic radiation. Since the electromagnetic radiation power refers to the energy of electromagnetic radiation emitted by the antenna unit in a unit time, and the SAR refers to the energy of electromagnetic radiation absorbed by a unit mass of material in a unit time, reducing the electromagnetic radiation power of the mobile terminal can reduce the SAR of the mobile terminal. Effects of small electromagnetic radiation on the human body.

In a possible implementation manner, the processor 201 may preset the first power, use the first power as the initial electromagnetic radiation power of the antenna unit, and control the antenna unit to perform electromagnetic radiation according to the first power. When the processor 201 receives the control signal, it indicates that a body part has entered the sensing range of the coil 202, which is equivalent to entering the electromagnetic radiation range of the mobile terminal. At this time, in order to reduce the influence of electromagnetic radiation on the human body, the first power It is reduced to the second power, and the antenna unit is controlled to perform electromagnetic radiation according to the second power.

Wherein, the second power may be the power preset by the processor 201, or may also be the power obtained by the processor 201 after reducing the first power by a preset range, or the power obtained by reducing the first power by a preset ratio , the preset amplitude is greater than 0, the preset ratio is greater than 0 and less than 1, and the preset amplitude and the preset ratio can be set according to requirements.

In the embodiment of the present disclosure, the coil 202 and the SAR processing unit 203 together constitute a SAR sensor. Regarding the coil 202, the following two cases can be included:

The first case: as shown in FIG. 3 , the mobile terminal includes a speaker, the speaker includes a speaker coil 2021, the above-mentioned coil 202 is the speaker coil 2021, and the processor 201 is connected to the speaker coil 2021, that is, the speaker coil 2021 is used as a SAR sensor. induction element.

The inductive range of the speaker coil 2021 can be determined according to the size. For example, the maximum size of the speaker coil 2021 in the horizontal direction is 15 mm, and the maximum size in the vertical direction is 10 mm. It can be used as the sensing element of the SAR sensor.

When the voice signal needs to be played, the processor 201 sends the voice signal to the speaker coil 2021, and the speaker coil 2021 plays the voice signal.

For example, when a user triggers a music playback instruction on the mobile terminal, when the processor 201 receives the music playback instruction, it acquires music data corresponding to the music playback instruction, samples the music data, obtains a voice signal, and sends it to the speaker coil 2021, The speaker coil 2021 converts the voice signal into a sound signal and plays it, thereby realizing the effect of playing music.

If a conductive substance is short-circuited to the ground, the potential of the conductive substance is zero and cannot be capacitively coupled with the human body, so it cannot be used as an inductive element of the SAR sensor. However, in the embodiment of the present disclosure, the speaker coil 2021 is not grounded and the potential is not zero, and can be used as an inductive element of the SAR sensor.

The second case: as shown in FIG. 4 , the mobile terminal includes an NFC (Near Field Communication, near field communication) module, the NFC module includes an NFC coil 2022, the above-mentioned coil 202 is an NFC coil 2022, and the processor 201 is connected to the NFC coil 2022, That is, the NFC coil 2022 is used as the sensing element of the SAR sensor.

If a conductive substance is short-circuited to the ground, the potential of the conductive substance is zero and cannot be capacitively coupled with the human body, so it cannot be used as an inductive element of the SAR sensor. However, the NFC coil 2022 in the embodiment of the present disclosure is not grounded and the potential is not zero, and can be used as an inductive element of the SAR sensor.

The NFC coil 2022 can not only act as an inductive element of a SAR sensor, but also receive or transmit signals:

The process of transmitting a signal includes:

The processor 201 sends a first communication signal to the NFC coil 2022, and when the NFC coil 2022 receives the first communication signal, it converts the first communication signal into a corresponding first NFC signal, and transmits a first NFC signal corresponding to the first communication signal .

For example, the mobile terminal can create a virtual bus card. When the user takes a bus, the processor 201 obtains the card number of the virtual bus card, sends a first communication signal carrying the card number to the NFC coil 2022, and the NFC coil 2022 receives the first communication signal When the first communication signal is converted into the corresponding first NFC signal, the first NFC signal carrying the card number can be transmitted, and the card reader device configured on the bus can receive the first NFC signal and obtain the user's Card number, the account corresponding to the card number will be debited.

The process of receiving a signal includes:

The communication device within the sensing range of the NFC coil 2022 transmits a second NFC signal, and the NFC coil 2022 receives the second NFC signal transmitted by the NFC communication device, converts the second NFC signal into a corresponding second communication signal, and sends the second NFC signal to the processor. 201 Send a second communication signal corresponding to the second NFC signal.

For example, the mobile terminal can be used as a contactless card reader. When the bank card with NFC function is within the sensing range of the NFC coil 2022, the NFC coil 2022 receives the second NFC signal transmitted by the bank card, and the second NFC signal carries the bank card. card number, the NFC coil 2022 converts the second NFC signal into a second communication signal and sends it to the processor 201, and the processor 201 can obtain the bank card number.

In the mobile terminal provided by the embodiment of the present disclosure, the coil 202 is capacitively coupled with the body part within the sensing range to generate an induction signal, and send a control signal to the processor 201. The processor 201 reduces the electromagnetic radiation power of the mobile terminal according to the control signal, thereby Reduce the SAR of mobile terminals. The embodiment of the present disclosure provides a mobile terminal that uses the existing coil of the mobile terminal as the sensing element of the SAR sensor, which ensures a large sensing range, does not need to add a metal coating separately, saves costs, and saves money for the mobile terminal. Larger space, the saved space can reduce the volume of the mobile terminal or be used to configure other electronic components, thereby improving flexibility.

Compared with the antenna in the mobile terminal as the sensing element of the SAR sensor, the SAR processing unit is connected to the matching circuit of the antenna and is electrically connected to the antenna. Since the metal body of the antenna is short-circuited to the ground, it needs to be connected to the matching circuit near the antenna end. A capacitor is connected in series to realize that the antenna is not short-circuited to the ground. At the same time, an inductor connected in parallel to the ground is added after the capacitor to shield the influence of the signal source on the inductive capacitor. Due to the high operating frequency of the antenna, the added circuit components will affect the performance of the antenna. It will bring certain influence; and the additional circuit will occupy the space of PCB (Printed Circuit Board, printed circuit board), which will bring certain limitations to the PCB design of the antenna. However, the embodiment of the present disclosure provides a mobile terminal that uses the existing coil of the mobile terminal as the sensing element of the SAR sensor. The coil is a metal that is not short-circuited to the ground, and no other components need to be added. Component performance effects and design limitations.

In another possible implementation manner, when the body part leaves the sensing range of the coil 202, the coil 202 and the body part are no longer capacitively coupled, so no induction signal is generated, and the processor 201 no longer receives the control signal. At this time, it can be determined that the human body part has left the sensing range of the coil 202, and the electromagnetic radiation power of the mobile terminal is increased, thereby ensuring that the mobile terminal can maintain high-power operation when the human body part leaves.

For example, if the processor 201 reduces the electromagnetic radiation power from the first power to the second power when the body part enters the induction range of the coil 202, then when the body part leaves the induction range of the coil 202, the processor 201 reduces the electromagnetic radiation power The power is increased from the second power to the first power, and the antenna unit is controlled to perform electromagnetic radiation according to the first power.

The transceiver performance of the antenna unit is related to the electromagnetic radiation power. The greater the electromagnetic radiation power used by the antenna unit, the stronger the transceiver performance, and the smaller the electromagnetic radiation power used, the worse the transceiver performance. In addition, SAR is also related to electromagnetic radiation power. The lower the electromagnetic radiation power, the lower the SAR, and the less electromagnetic radiation energy absorbed by the human body. The higher the electromagnetic radiation power, the higher the SAR, and the more electromagnetic radiation energy absorbed by the human body.

Therefore, considering the transceiver performance and SAR of the antenna unit, the mobile terminal can detect whether the body part is close to the mobile terminal by setting the SAR sensor, so that when the body part is not close to the mobile terminal, a higher electromagnetic radiation power can be used to ensure that the body part is not close to the mobile terminal. Transceiver performance of the antenna unit. However, when the human body is close to the mobile terminal, the electromagnetic radiation power is reduced, and the electromagnetic radiation power is lower, so as to avoid the influence of electromagnetic radiation on the human body as much as possible.

In another possible implementation manner, the mobile terminal further includes a decoupling circuit 204. As shown in FIG. 5, the coil 202 is connected to the decoupling circuit 204, and the decoupling circuit 204 is connected to the SAR processing unit 203. The decoupling circuit 204 uses To isolate the mutual interference between the speaker or the NFC module and the SAR processing unit 203 .

When the coil 202 is capacitively coupled with the body part within the sensing range to generate an induction signal, there may be noise signals other than the induction signal on the coil 202, such as interference signals generated by other components in the mobile terminal, voice on the speaker coil Signals, communication signals on NFC coils, etc. Then, when the coil 202 sends a signal to the decoupling circuit, the signal will include an induction signal and a noise signal. The decoupling circuit 204 receives the signal, removes the noise signal to obtain the induction signal, and sends the induction signal to the SAR processing unit 203, thereby avoiding the noise signal. interference. After that, the SAR processing unit 203 receives the induction signal, and sends a control signal to the processor 201, and the processor 201 reduces the electromagnetic radiation power of the mobile terminal according to the received control signal.

The decoupling circuit 204 may be an active filter circuit, an LC (inductance capacitor) filter circuit, an L-shaped filter circuit, a π-shaped filter circuit, or the like.

In the embodiment of the present disclosure, the coil sends a signal to the decoupling circuit, the signal includes an induction signal and a noise signal, the decoupling circuit removes the noise signal, sends the induction signal to the SAR processing unit, and the SAR processing unit receives the induction signal and sends the control signal to the processor , the processor reduces the electromagnetic radiation power of the mobile terminal according to the received control signal. By arranging a decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the body part within the induction range can be accurately identified.

FIG. 6 is a flowchart of a method for controlling a mobile terminal according to an exemplary embodiment. As shown in FIG. 6 , the method is applied to the mobile terminal shown in the foregoing embodiment, and the method includes:

In step 601, the coil is capacitively coupled with the body part within the sensing range to generate an induction signal, and send the induction signal to the SAR processing unit.

In step 602, when the SAR processing unit receives the sensing signal, it sends a control signal to the processor.

In step 603, when the processor receives the control signal, it reduces the electromagnetic radiation power of the mobile terminal according to the control signal.

In a possible implementation, the method further includes:

The processor sends a voice signal to the speaker coil, and the speaker coil plays the voice signal.

In another possible implementation, the method further includes:

The processor sends a first communication signal to the NFC coil, and when the NFC coil receives the first communication signal, it transmits a first NFC signal corresponding to the first communication signal.

Or, the NFC coil receives the second NFC signal transmitted by the NFC communication device within the sensing range, and sends the second communication signal corresponding to the second NFC signal to the processor.

In another possible implementation manner, the mobile terminal further includes: a decoupling circuit, the coil is connected to the decoupling circuit, and the decoupling circuit is connected to the SAR processing unit; sending an induction signal to the SAR processing unit includes: sending the coil to the decoupling circuit Signals include induced signals and noise signals.

The decoupling circuit removes the noise signal and sends the induced signal to the SAR processing unit.

In the method provided by the embodiment of the present disclosure, the coil is capacitively coupled with the body part within the sensing range to generate an induction signal, and a control signal is sent to the processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal, thereby reducing the mobile terminal's electromagnetic radiation power. SAR. The embodiments of the present disclosure provide a control method for a mobile terminal that uses an existing coil of the mobile terminal as an inductive element of a SAR sensor, without adding a metal coating separately, saving costs, and saving a large space for the mobile terminal, The saved space can reduce the size of the mobile terminal or be used for configuring other electronic components, improving flexibility.

By arranging a decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the body part within the induction range can be accurately identified.

Other embodiments of the present disclosure will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the 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 structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A mobile terminal, characterized in that the mobile terminal comprises: a processor, a coil and a SAR processing unit;

the coil is connected with the SAR processing unit;

The SAR processing unit is connected with the processor;

the coil is a loudspeaker coil or an NFC coil;

the coil is used for carrying out capacitive coupling with a human body part in an induction range, generating an induction signal and sending the induction signal to the SAR processing unit;

the SAR processing unit is used for sending a control signal to the processor when receiving the induction signal;

and the processor is used for reducing the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal.

2. The mobile terminal of claim 1, wherein the mobile terminal further comprises: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit;

the coil is used for sending a signal to the decoupling circuit, and the signal comprises the induction signal and a noise signal;

the decoupling circuit is used for removing the noise signal and sending the induction signal to the SAR processing unit.

3. The mobile terminal of claim 2, wherein the decoupling circuit is an active filter circuit, an LC filter circuit, an L-filter circuit, or a pi-filter circuit.

4. The mobile terminal of claim 1, further comprising a housing, the processor and the SAR processing unit being located inside the housing;

the coil is located inside the surface of the housing or on the surface of the housing.

5. The mobile terminal of claim 1, wherein a maximum sensing distance of the sensing range is between 5 mm and 35 mm.

6. The mobile terminal of claim 5, wherein a maximum sensing distance of the sensing range is 30 mm.

7. A control method of a mobile terminal, applied to the mobile terminal of any one of claims 1 to 6, the method comprising:

the coil is capacitively coupled with a human body part in an induction range to generate an induction signal, and the induction signal is sent to the SAR processing unit;

the SAR processing unit sends a control signal to the processor when receiving the induction signal;

and when the processor receives the control signal, the electromagnetic radiation power of the mobile terminal is reduced according to the control signal.

8. The method of claim 7, further comprising:

The processor sends a voice signal to the loudspeaker coil, and the loudspeaker coil plays the voice signal.

9. The method of claim 7, further comprising:

the processor sends a first communication signal to the NFC coil;

when the NFC coil receives the first communication signal, a first NFC signal corresponding to the first communication signal is transmitted; or,

and the NFC coil receives a second NFC signal transmitted by the NFC communication equipment in the induction range and sends a second communication signal corresponding to the second NFC signal to the processor.

10. The method of claim 7, wherein the mobile terminal further comprises: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit; the sending the sensing signal to the SAR processing unit includes:

the coil sends a signal to the decoupling circuit, the signal comprising the inductive signal and a noise signal;

the decoupling circuit removes the noise signal and sends the induction signal to the SAR processing unit.

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