CN107152939A - The human testing circuit and method of terminal - Google Patents
The human testing circuit and method of terminal Download PDFInfo
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- CN107152939A CN107152939A CN201710279134.5A CN201710279134A CN107152939A CN 107152939 A CN107152939 A CN 107152939A CN 201710279134 A CN201710279134 A CN 201710279134A CN 107152939 A CN107152939 A CN 107152939A
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 26
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
- G01D5/2417—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying separation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
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Abstract
The present invention relates to electronic technology field, the human testing circuit and method of a kind of terminal are disclosed.In embodiment of the present invention, the human testing circuit of terminal, including：Pumping signal output circuit, processor, signal amplitude detection circuit and human body sensing piece；Pumping signal output circuit is connected with processor and human body sensing piece respectively；Wherein, processor is used for the pumping signal for controlling pumping signal output circuit to export predeterminated frequency to human body sensing piece；Signal amplitude detection circuit is connected with human body sensing piece and processor respectively；Wherein, signal amplitude detection circuit is used to obtain the signal amplitude at human body sensing piece, and signal amplitude is transferred into processor；Processor is used to, according to signal amplitude, obtain the distance between human body and human body sensing piece.Using embodiments of the present invention, terminal can obtain the distance between human body and terminal in the case where being not provided with range sensor, still, and operation is relatively simple, and cost is relatively low.
Description
Technical field
The present invention relates to the human testing circuit and method of electronic technology field, more particularly to terminal.
Background technology
With the fast development of science and technology, terminal increasingly widespreadization in the modern life such as mobile phone, tablet personal computer.These
Terminal is typically provided with range sensor, and when user is answering or dialing phone, range sensor can measure the reflection of human body
The distance between face (e.g., face, hair, hand etc.) and terminal, and during therebetween in small distance, control terminal go out screen,
To avoid unexpected touch input, while user-friendly, also more power saving.
But, the inventor of present patent application has found that prior art at least has following defect：
In the prior art, it is generally required that larger opening is provided with the touch-screen of terminal, to ensure range sensor
Receiving unit can receive the amount light of the condition of satisfaction.But, larger opening can cause the outward appearance of terminal to receive necessarily
Influence.Although some dispatch from the factory, the chamber of commerce covers opening using decorative structure, to improve the aesthetic property of equipment.But, decoration
Not only cost is higher for property structure, and the transmitting and reception of the sensor light signal that can adjust the distance have a certain impact, and are easily caused
The distance between the reflecting surface and terminal of detected human body not accurate enough situation.
The content of the invention
The purpose of embodiment of the present invention is human testing circuit and the method for providing a kind of terminal so that terminal is not
In the case that range sensor is set, can still obtain the distance between human body and terminal, operate it is relatively simple, and cost compared with
It is low.
In order to solve the above technical problems, embodiments of the present invention provide a kind of human testing circuit of terminal, including：
Pumping signal output circuit, processor, signal amplitude detection circuit and human body sensing piece；
Pumping signal output circuit is connected with processor and human body sensing piece respectively；Wherein, processor is used to control to swash
Encourage the pumping signal that signal output apparatus exports predeterminated frequency to human body sensing piece；
Signal amplitude detection circuit is connected with human body sensing piece and processor respectively；Wherein, signal amplitude detection circuit
Processor is transferred to for obtaining the signal amplitude at human body sensing piece, and by signal amplitude；Processor is used for according to signal width
Degree, obtains the distance between human body and human body sensing piece.
Embodiments of the present invention additionally provide a kind of human body detecting method of terminal, applied to terminal as stated above
Human testing circuit, this method includes：
The pumping signal of predeterminated frequency is exported to human body sensing piece；
Obtain the signal amplitude at human body sensing piece；
According to signal amplitude, the distance between human body and human body sensing piece are obtained.
Embodiment of the present invention in terms of existing technologies, is used to detect the circuit of human body by being provided with the terminal,
To detect the distance between human body and terminal, so as to make terminal in the case where being not provided with range sensor, it can still obtain
The distance between human body and terminal, operation are relatively simple, and cost is relatively low.Wherein, the human testing circuit of terminal includes excitation
Signal output apparatus, processor, signal amplitude detection circuit and human body sensing piece, processor control pumping signal output circuit
The pumping signal of predeterminated frequency is exported to human body sensing piece, when there is human body close to human body sensing piece, people is known from experience to human body sensing
Signal at piece is impacted, therefore, and human testing circuit is also detected at human body sensing piece using signal amplitude detection circuit
Signal amplitude, in order to processor can according to the signal amplitude detected by signal amplitude detection circuit, obtain human body with
The distance between human body sensing piece.So, equivalent in the terminal be provided with one with range sensor function identical " instead of dress
Put ", so that the distance between human body and terminal can not only be detected, and it need not set corresponding on terminal touch screen
Opening, the demand of user can be matched by making the outward appearance of terminal.
In addition, pumping signal output circuit includes：Exciting signal source, first resistor and low-pass filter circuit；Excitation letter
Number source is connected with processor；Low-pass filter circuit is connected with human body sensing piece；First resistor is connected to exciting signal source and low pass
Between filter circuit.In this way, low-pass filter circuit is set in pumping signal output circuit, can isolates in terminal
The interference that radiofrequency signal produced by other radio circuits is caused to human testing circuit.
In addition, low-pass filter circuit is lc circuit；Wherein, the inductance connection of lc circuit is in first resistor and human body sensing piece
Between；The capacitance connection of lc circuit is between first resistor and ground.Implemented this provides one kind of low-pass filter circuit
Form, adds the feasibility of embodiment of the present invention.
In addition, human body sensing piece is the radio-frequency antenna of terminal.So, the radio-frequency antenna of terminal is shared as human body sensing
Piece, can reduce the use of device, reduce the cost of manufacture of terminal.
In addition, human testing circuit also includes：High-pass filtering circuit；High-pass filtering circuit is connected to the radio-frequency antenna of terminal
Between the antenna-matching circuit of terminal, so as to reduce pumping signal output circuit to other radio circuits in terminal
Influence.
Brief description of the drawings
Fig. 1 is the structural representation according to the human testing circuit of terminal in first embodiment of the invention；
Fig. 2 is the concrete structure schematic diagram according to the human testing circuit of terminal in first embodiment of the invention；
Fig. 3 is the structural representation according to the human testing circuit of terminal in second embodiment of the invention；
Fig. 4 is the flow chart according to the human body detecting method of terminal in third embodiment of the invention；
Fig. 5 is the flow chart according to the human body detecting method of terminal in four embodiment of the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with each reality of the accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the invention,
In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and base
Many variations and modification in following embodiment, can also realize the application technical scheme claimed.
The first embodiment of the present invention is related to a kind of human testing circuit of terminal, as shown in Figure 1, 2, including：Excitation
Signal output apparatus 1, processor 2, signal amplitude detection circuit 3 and human body sensing piece 4.Wherein, pumping signal output circuit 1
Be connected respectively with processor 2 and human body sensing piece 4, signal amplitude detection circuit 3 respectively with human body sensing piece 4 and processor
2 connections.Terminal in present embodiment can be the electronic equipments such as mobile phone, tablet personal computer.Below to terminal in present embodiment
The operation principle of human testing circuit be specifically described：
Specifically, processor 2 is used to control pumping signal output circuit 1 to export predeterminated frequency to human body sensing piece 4
Pumping signal, when there is human body close to human body sensing piece 4, people knows from experience to be impacted to the signal at human body sensing piece 4, therefore,
Human testing circuit also detects the signal amplitude at human body sensing piece 4 using signal amplitude detection circuit 3, in order to processor
2 can obtain the distance between human body and human body sensing piece 4 according to the signal amplitude detected by signal amplitude detection circuit 2.
Wherein, predeterminated frequency can be pre-set by technical staff and is stored in processor 2, e.g., and predeterminated frequency can be 1 megahertz
Hereby.
In present embodiment, signal amplitude detection circuit 3 can by front end amplifying unit, rectification unit, filter unit with
And AD conversion unit is constituted, rectification unit is arranged between front end amplifying unit and filter unit；Filter unit is arranged on
Between rectification unit and AD conversion unit.Wherein, front end amplifying unit is used to amplify input signal, can improve signal amplitude
Detect the sensitivity that circuit 3 is detected.So, the signal at human body sensing piece 4 is amplified through front end amplifying unit, and after through whole
Unit and filter unit are flowed, direct current signal is converted to by AC signal, most data signal is converted to through AD conversion unit afterwards,
It can realize that signal amplitude detection circuit 3 obtains the signal amplitude at human body sensing piece 4.Pumping signal output circuit 1 includes：Swash
Encourage signal source 11, first resistor R1And low-pass filter circuit 12.Exciting signal source 11 is connected with processor 2, LPF electricity
Road 12 is connected with human body sensing piece 4, and first resistor R1 is connected between exciting signal source 11 and low-pass filter circuit 12.Wherein,
Low-pass filter circuit can be lc circuit.The L of lc circuit1It is connected to first resistor R1Between human body sensing piece 4, lc circuit
Electric capacity C1It is connected to first resistor R1Between ground GND.
Specifically, L1Inductance value be generally it is tens of arrive hundreds of nanohenrys, C1Capacitance be generally it is tens of arrive hundreds of skins
Method.First resistor R1As the divider resistance of low-pass filter circuit, its resistance can be 0.9M Europe.Due to being the presence of it in terminal
His radio circuit, e.g., Long Term Evolution (Long Term Evolution, referred to as " LTE ") hair of universal mobile communications technology
Transmit-receive radio road, and the radiofrequency signal produced by these radio circuits is typically all the higher signal of frequency, therefore, present embodiment
In, low-pass filter circuit also is set in pumping signal output circuit 1, for isolating in terminal produced by other radio circuits
The interference that is caused to human testing circuit of radiofrequency signal.
More specifically, it is variable equivalent to foring one between the human body sensing piece 4 and ground in human testing circuit
Electric capacity, when human body is close to human body sensing piece 4, people knows from experience and one capacity plate antenna of formation of human body sensing piece 4, the electricity of the capacity plate antenna
Capacitance and human body are directly related with the distance between human body sensing piece 4：Human body and the distance between human body sensing piece 4 are smaller, then
The capacitance of capacity plate antenna is bigger；Human body and the distance between human body sensing piece 4 are bigger, then the capacitance of capacity plate antenna is smaller.
Wherein, capacity plate antenna value formula is formed between human body and human body sensing piece 4 is：C=(A*S)/d, C are human body and human body sensing piece
Between the capacity plate antenna amount that is formed；A is dielectric constant of air；S is the area of human body sensing piece；D is human body and human body sensing piece
The distance between.
Take below 4G multimode terminals, exciting signal frequency as 1 megahertz, L of terminal1For 82 nanohenrys, C1 is 68 pico farads, empty
Gas dielectric constant, 8.86*10-12, sensing chip area is 1 square centimeter, and the distance between human body sensing piece 4 and human body are 0.5 li
Rice, it is counter to the operation principle of human testing circuit alleged it is bright：
When the distance between human body sensing piece 4 and human body are 0.5 centimetre, according to formula C=(A*S)/d, calculate flat
Plate electric capacity C capacity is 0.177 pico farad.
Due to electric capacity capacitive reactance formula：XC=1/ ω C, ω=2* π * f；Wherein, XCFor electric capacity capacitive reactance, ω is angular frequency, and π is
Pi, f is signal frequency.
When f is 1 megahertz, electric capacity capacitive reactance XC=1/ (1 megahertz of * 0.177 pico farad of=2* π *)=0.9 megohm；
Assuming that：VdetThe signal amplitude detected for signal amplitude detection circuit 3, ViFor the defeated of pumping signal output circuit 1
Go out voltage, then can draw formula Vdet=(Vi*XC)/(R1+XC)；
Therefore, according to above-mentioned formula, the signal amplitude that can be detected according to signal amplitude detection circuit 3 is counter to release people
The capacitance with the capacity plate antenna of the formation of human body sensing piece 4 is known from experience, so as to draw the distance between human body and human inductor 4.
It is noted that in present embodiment, the front end amplifying unit of signal amplitude detection circuit 3 can be designed to height
Input impedance, e.g., the input impedance of front end amplifying unit could be arranged to be more than or equal to 10 megaohms, can be conducive to reducing
Signal amplitude detection circuit 3 is to the influence caused by human body sensing piece 4.It is specifically described below：
Take still 4G multimode terminals, exciting signal frequency as 1 megahertz, L of terminal1For 82 nanohenrys, C1For 68 pico farads, air
Dielectric constant, 8.86*10-12, sensing chip area is 1 square centimeter, and the distance between human body sensing piece 4 and human body are 0.5 li
Rice, it is counter to the operation principle of human testing circuit alleged it is bright：
Specifically, when the distance between human body sensing piece 4 and human body are 0.5 centimetre, according to formula C=(A*S)/d,
The capacity for calculating capacity plate antenna C is 0.177 pico farad.
Due to electric capacity capacitive reactance formula：XC=1/ ω C, ω=2* π * f, therefore when f is 1 megahertz, electric capacity capacitive reactance XC=1/
(1 megahertz of * 0.177 pico farad of=2* π *)=0.9 megohm；
The input impedance of front end amplifying unit is defined as Rdet-in, due in human testing circuit, Rdet-inWith XCPlace
In parallel connection, therefore, Rdet-inWith XCParallel resistance R0For：(Rdet-in*XC)/(Rdet-in+XC)。
Due to Rdet-inWith XCIn parallel connection, and and R1In series connection, therefore Vdet=(Vi*R0)/(R0+R1),
By R0For：(Rdet-in*XC)/(Rdet-in+XC) bring formula into and obtain：
Vdet=(Vi*(Rdet-in*XC)/(Rdet-in+XC))/((Rdet-in*XC)/(Rdet-in+XC)+R1)；
Formula scales are carried out to obtain：Vdet=(Vi*Rdet-in*XC)/(Rdet-in*XC+R1*Rdet-in+R1XC)；
Due to Rdet-in＞ ＞ R1, and Rdet-in＞ ＞ XC, therefore in formula scales, R1*XCIt can be ignored, therefore,
Vdet=(Vi*Rdet-in*XC)/((Rdet-in*XC+R1*Rdet-in)；
Formula is simplified, obtained：Vdet=(Vi*XC)/(R1+XC)。
It is not difficult to find out, when the input impedance of the front end amplifying unit of signal amplitude detection circuit 3 is larger, and to VdetNo
Impact, VdetAlso it is (Vi*XC)/(R1+XC).Therefore, according to above-mentioned formula, it can be detected according to signal amplitude detection circuit 3
The signal amplitude arrived, it is anti-to release the capacitance that people knows from experience the capacity plate antenna formed with human body sensing piece 4, so as to draw human body and people
The distance between body inductor 4.
It is noted that each module involved in present embodiment is logic module, and in actual applications, one
Individual logic unit can be a part for a physical location or a physical location, can also be with multiple physics lists
The combination of member is realized.In addition, will not be with solving institute of the present invention in the innovative part in order to protrude the present invention, present embodiment
The technical problem relation of proposition less close unit is introduced, but this be not intended that in present embodiment be not present it is other single
Member.
Compared with prior art, in present embodiment, by being provided with the circuit for being used for detecting human body in the terminal, to detect
The distance between human body and terminal, so as to make terminal in the case where being not provided with range sensor, can still obtain human body with
The distance between terminal, operation is relatively simple, and cost is relatively low.So, equivalent in the terminal there is provided one and Distance-sensing
Device function identical " instead of device ", so that the distance between human body and terminal can not only be detected, and need not be at end
Corresponding opening is set on the touch screen of end, the demand of user can be matched by making the outward appearance of terminal.
Second embodiment of the present invention is related to a kind of human testing circuit of terminal, as shown in Figure 3.Second embodiment
Improved, mainly theed improvement is that on the basis of first embodiment：In second embodiment of the invention, terminal
Radio-frequency antenna is shared as human body sensing piece 4, can be reduced the use of device, be reduced the cost of manufacture of terminal.
In present embodiment, human body sensing piece 4 is the radio-frequency antenna of terminal.Also, in present embodiment, human testing electricity
Road also includes：High-pass filtering circuit 5.High-pass filtering circuit 5 is connected to radio-frequency antenna (that is, human body sensing piece 4) and the end of terminal
Between the antenna-matching circuit 6 at end.
Specifically, because the radiofrequency signal produced by the radio circuit in terminal is typically all the higher signal of frequency,
Therefore, in present embodiment, high-pass filtering circuit also is set between the radio-frequency antenna of terminal and the antenna-matching circuit 6 of terminal
5, for reducing influence of the pumping signal output circuit 1 to other radio circuits in terminal.Wherein, high-pass filtering circuit 5
It can be lc circuit.The electric capacity C of lc circuit2It is connected between human body sensing piece 4 and antenna-matching circuit 6, the L of lc circuit2Connection
Between antenna-matching circuit 6 and ground.
Third embodiment of the invention is related to a kind of human body detecting method of terminal, and idiographic flow is as shown in Figure 4.This implementation
Detection method in mode can the terminal provided in first embodiment or second embodiment human testing circuit
On the basis of implemented, comprise the following steps that：
Step 401, the pumping signal of predeterminated frequency is exported to human body sensing piece.
Specifically, predeterminated frequency can be pre-set by technical staff and is stored in processor 2, e.g., predeterminated frequency
It can be 1 megahertz.
Step 402, the signal amplitude at human body sensing piece is obtained.
Specifically, when there is human body close to human body sensing piece, people knows from experience to be impacted to the signal at human body sensing piece,
Therefore, by way of obtaining the signal amplitude at human body sensing piece, the distance between human body and human body sensing piece are resulted in.
More specifically, between the human body sensing piece and ground in human testing circuit equivalent to form one can power transformation
Hold, when human body is close to human body sensing piece, people knows from experience and human body sensing piece one capacity plate antenna of formation, the capacitance of the capacity plate antenna
It is directly related with the distance between human body sensing piece with human body：Human body and the distance between human body sensing piece are smaller, then flat board electricity
The capacitance of appearance is bigger；Human body and the distance between human body sensing piece are bigger, then the capacitance of capacity plate antenna is smaller.
Step 403, according to signal amplitude, the distance between human body and human body sensing piece are obtained.
Specifically, understood according to the analysis for the human testing circuit in first embodiment, being directed to terminal：Vdet=
(Vi*XC)/(R1+XC), wherein, XCFor the electric capacity capacitive reactance of low-pass filter circuit, VdetDetected for signal amplitude detection circuit 3
Signal amplitude, ViFor the output voltage of pumping signal output circuit 1.Due to forming capacity plate antenna between human body and human body sensing piece
Value formula is：C=(A*S)/d, C is the capacity plate antenna amount formed between human body and human body sensing piece；A is dielectric constant of air；
S is the area of human body sensing piece；D is the distance between human body and human body sensing piece.Therefore, according to formula Vdet=(Vi*XC)/
(R1+XC) and formula C=(A*S)/d, the distance between human body and human body sensing piece can be obtained.
Four embodiment of the invention is related to a kind of human body detecting method of terminal, and idiographic flow is as shown in Figure 5.4th is real
Apply mode to be improved on the basis of the 3rd embodiment, mainly the improvement is that：In four embodiment of the invention,
When distance also between human body and human body sensing piece is less than predetermined threshold value, control terminal reduction transmission power, to reduce terminal
Radiation to human body.It is specifically described below：
The step 401 of step 501 in present embodiment into step 503 and the 4th embodiment to step 403 substantially
It is identical, repeated to reduce, will not be repeated here, only different piece is illustrated below：
Step 504, judge whether the distance between human body and human body sensing piece are less than predetermined threshold value.If so, then performing step
Rapid 505, otherwise perform step 501.
Specifically, predetermined threshold value can be pre-set by user or technical staff and be preserved in the terminal, e.g., preset threshold
Value can be 0.5 centimetre.
Step 505, transmission power is reduced.
Specifically, the processor of terminal sends control instruction to radio frequency transmitter circuitry, in order to radio frequency transmitter circuitry with
The mode of the bias voltage or bias current of certain one-level amplifier bias voltage or bias current or casacade multi-amplifier is reduced, to drop
Low gain, so as to reduce power output, reaches the purpose of reduction transmission power.
It is noted that in present embodiment, in order to save the power consumption of human testing circuit in the terminal, can also make
The processor of terminal is operated according to triggering cycle, periodically triggering human testing circuit.Wherein, the triggering cycle can be by
Technical staff pre-sets and is stored in the processor of terminal.Such as, the triggering cycle can be several ms or hundreds of milliseconds.
The step of various methods are divided above, be intended merely to description it is clear, can be merged into when realizing a step or
Some steps are split, multiple steps are decomposed into, as long as including identical logical relation, all protection domain in this patent
It is interior；To adding inessential modification in algorithm or in flow or introducing inessential design, but its algorithm is not changed
Core design with flow is all in the protection domain of the patent.
It will be appreciated by those skilled in the art that realizing that all or part of step in above-described embodiment method can be by
Program instructs the hardware of correlation to complete, and the program storage is in a storage medium, including some instructions are to cause one
Individual equipment (can be single-chip microcomputer, chip etc.) or processor (processor) perform each embodiment methods described of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of human testing circuit of terminal, it is characterised in that including：Pumping signal output circuit, processor, signal amplitude
Detect circuit and human body sensing piece；
The pumping signal output circuit is connected with the processor and the human body sensing piece respectively；Wherein, the processing
Device is used for the pumping signal for controlling the pumping signal output circuit to export predeterminated frequency to the human body sensing piece；
The signal amplitude detection circuit is connected with the human body sensing piece and the processor respectively；Wherein, the signal
Amplitude detection circuit is used to obtain the signal amplitude at the human body sensing piece, and the signal amplitude is transferred into the processing
Device；The processor is used to, according to the signal amplitude, obtain the distance between human body and described human body sensing piece.
2. the human testing circuit of terminal according to claim 1, it is characterised in that the pumping signal output circuit bag
Include：Exciting signal source, first resistor and low-pass filter circuit；
The exciting signal source is connected with the processor；
The low-pass filter circuit is connected with the human body sensing piece；
The first resistor is connected between the exciting signal source and the low-pass filter circuit.
3. the human testing circuit of terminal according to claim 1, it is characterised in that the signal amplitude detection circuit bag
Include：Front end amplifying unit, rectification unit, filter unit and AD conversion unit；
The rectification unit is arranged between the front end amplifying unit and the filter unit；
The filter unit is arranged between the rectification unit and the AD conversion unit.
4. the human testing circuit of terminal according to claim 3, it is characterised in that the input of the front end amplifying unit
Impedance is more than or equal to 10 megaohms.
5. the human testing circuit of terminal according to claim 2, it is characterised in that the low-pass filter circuit is LC electricity
Road；
Wherein, the inductance connection of the lc circuit is between the first resistor and the human body sensing piece；The lc circuit
Capacitance connection is between the first resistor and ground.
6. the human testing circuit of terminal according to claim 1, it is characterised in that the human body sensing piece is the end
The radio-frequency antenna at end.
7. the human testing circuit of terminal according to claim 6, it is characterised in that also include：High-pass filtering circuit；
The high-pass filtering circuit is connected between the antenna-matching circuit of the radio-frequency antenna of the terminal and the terminal.
8. a kind of human body detecting method of terminal, it is characterised in that applied to the end as any one of claim 1 to 7
The human testing circuit at end, methods described includes：
The pumping signal of predeterminated frequency is exported to human body sensing piece；
Obtain the signal amplitude at the human body sensing piece；
According to the signal amplitude, the distance between human body and described human body sensing piece are obtained.
9. the human body detecting method of terminal according to claim 8, it is characterised in that the acquisition human body and the human body
After the distance between sensing chip, in addition to：
Judge whether the distance is less than predetermined threshold value；
If the distance is less than predetermined threshold value, the terminal reduces transmission power.
10. the human body detecting method of terminal according to claim 8, it is characterised in that described according to the signal amplitude,
The distance between human body and described human body sensing piece are obtained, is specifically included：
According to the signal amplitude, the capacity plate antenna amount formed between the human body and the human body sensing piece is calculated；
According to formula C=(A*S)/d, the distance between the human body and described human body sensing piece are obtained；
Wherein, C is the capacity plate antenna amount formed between the human body and the human body sensing piece；A is dielectric constant of air；S is
The area of the human body sensing piece；D is the distance between the human body and described human body sensing piece.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710039A (en) * | 2018-05-17 | 2018-10-26 | 南昌华勤电子科技有限公司 | Mobile terminal and its SAR test devices, SAR test methods |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079768A1 (en) * | 1999-06-21 | 2000-12-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Apparatus comprising capacitive proximity sensor |
| CN102590867A (en) * | 2012-02-03 | 2012-07-18 | 华为终端有限公司 | Approaching detection device and mobile terminal |
| CN103399653A (en) * | 2013-07-19 | 2013-11-20 | 深圳超多维光电子有限公司 | Telescopic device, operating bar and measurement method |
| CN103870085A (en) * | 2014-02-28 | 2014-06-18 | 惠州市德帮实业有限公司 | Mobile telephone distance sensing device based on capacitive sensing and mobile telephone distance sensing method based on capacitive sensing |
| CN104391331A (en) * | 2014-12-02 | 2015-03-04 | 中国人民解放军军械工程学院 | Giant magneto-impedance sensor device for detecting distance and signal processing method thereof |
| CN105939417A (en) * | 2016-06-03 | 2016-09-14 | 上海摩软通讯技术有限公司 | Mobile terminal and signal transmitting power adjusting method of mobile terminal |
| CN106411420A (en) * | 2016-09-06 | 2017-02-15 | 惠州Tcl移动通信有限公司 | Signal interference elimination circuit and mobile device |
| CN106527835A (en) * | 2016-11-10 | 2017-03-22 | 捷开通讯(深圳)有限公司 | Communication terminal and distance induction apparatus thereof |
-
2017
- 2017-04-25 CN CN201710279134.5A patent/CN107152939A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079768A1 (en) * | 1999-06-21 | 2000-12-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Apparatus comprising capacitive proximity sensor |
| CN102590867A (en) * | 2012-02-03 | 2012-07-18 | 华为终端有限公司 | Approaching detection device and mobile terminal |
| CN103399653A (en) * | 2013-07-19 | 2013-11-20 | 深圳超多维光电子有限公司 | Telescopic device, operating bar and measurement method |
| CN103870085A (en) * | 2014-02-28 | 2014-06-18 | 惠州市德帮实业有限公司 | Mobile telephone distance sensing device based on capacitive sensing and mobile telephone distance sensing method based on capacitive sensing |
| CN104391331A (en) * | 2014-12-02 | 2015-03-04 | 中国人民解放军军械工程学院 | Giant magneto-impedance sensor device for detecting distance and signal processing method thereof |
| CN105939417A (en) * | 2016-06-03 | 2016-09-14 | 上海摩软通讯技术有限公司 | Mobile terminal and signal transmitting power adjusting method of mobile terminal |
| CN106411420A (en) * | 2016-09-06 | 2017-02-15 | 惠州Tcl移动通信有限公司 | Signal interference elimination circuit and mobile device |
| CN106527835A (en) * | 2016-11-10 | 2017-03-22 | 捷开通讯(深圳)有限公司 | Communication terminal and distance induction apparatus thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710039A (en) * | 2018-05-17 | 2018-10-26 | 南昌华勤电子科技有限公司 | Mobile terminal and its SAR test devices, SAR test methods |
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