CN107884766A - Enter the method, apparatus and electronic equipment of row distance detection based on antenna - Google Patents
Enter the method, apparatus and electronic equipment of row distance detection based on antenna Download PDFInfo
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- CN107884766A CN107884766A CN201710942866.8A CN201710942866A CN107884766A CN 107884766 A CN107884766 A CN 107884766A CN 201710942866 A CN201710942866 A CN 201710942866A CN 107884766 A CN107884766 A CN 107884766A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
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Abstract
The invention discloses a kind of method, apparatus and electronic equipment for entering row distance detection based on antenna.This method includes：The detection radiofrequency signal of frequency is selected to antenna transmission；Detect the currency of the radio frequency parameter of the antenna transmitting detection radiofrequency signal；According to the corresponding relation between the numerical value of radio frequency parameter and human body distance, it is determined that current human's distance of corresponding currency；Wherein, frequency is selected outside the working frequency range of antenna, and the numerical value of radio frequency parameter is changed with human body distance in distance measurement ranges in monotonicity, and human body distance is the distance between human body and the antenna.
Description
Technical field
The present invention relates to transmission-line aerial testing field, more particularly it relates to which one kind enters row distance based on antenna
The method of detection, it is a kind of based on antenna enter row distance detection safety protecting method, it is a kind of based on antenna enter row distance detection
Device, a kind of safety device and a kind of electronic equipment for entering row distance detection based on antenna.
Background technology
The maximum conductance power of the existing terminal that can be communicated wirelessly is usually a fixed value, when human body excessively
During close to terminal antenna, Radiation On Human body caused by terminal antenna be present has the defects of injury effect.
In order to assess radiation level of the antenna to human body, human body distance, i.e. human body can be detected by setting sensor
With the distance of antenna.These sensors are, for example, optical sensor, acceleration transducer, the geographical position sensing placed close to antenna
Device, capacitive proximity degree sensor etc., the problem of first three sensor is present be：When human body is at an angle close to antenna
When, sensor will fail；The problem of latter sensor is present be：Antenna performance can dislike because being acted on and being influenceed by electric capacity
Change.
The content of the invention
One purpose of the embodiment of the present invention be to provide it is a kind of judge human body whether close to antenna new technical scheme.
According to the first aspect of the invention, there is provided a kind of method for entering row distance detection based on antenna, it includes：
The detection radiofrequency signal of frequency is selected to antenna transmission；
Detect the currency of the radio frequency parameter of the antenna transmitting detection radiofrequency signal；
According to the corresponding relation between the numerical value of the radio frequency parameter and human body distance, it is determined that the corresponding currency is worked as
Preceding human body distance；
Wherein, the selected frequency is outside the working frequency range of the antenna, and cause the numerical value of the radio frequency parameter with
Human body distance changes in distance measurement ranges in monotonicity, and the human body distance is the distance between human body and the antenna.
Alternatively, the corresponding relation between numerical value and the human body distance according to the radio frequency parameter, it is determined that corresponding institute
Stating current human's distance of currency includes：
The table of comparisons of the reflection corresponding relation prestored is searched, and is worked as according to table of comparisons determination is corresponding
Current human's distance of preceding value.
Alternatively, in the case where current human distance is less than the safe distance threshold value of setting, the work of antenna is reduced
The maximum conductance power of working frequency.
Alternatively, the radio frequency parameter is return loss, voltage standing wave ratio, phase, delay or radiation impedance.
According to the second aspect of the invention, there is provided a kind of safety protecting method for entering row distance detection based on antenna, its
Including：
The detection radiofrequency signal of frequency is selected to antenna transmission；
Detect the currency of the radio frequency parameter of the antenna transmitting detection radiofrequency signal；
In the case where the currency meets to impose a condition, the maximum conductance work(of the working frequency of the antenna is reduced
Rate；
Wherein, the selected frequency imposes a condition as more than setting outside the working frequency range of the antenna, and described
Cause the numerical value of the radio frequency parameter successively decreases with human body distance in distance measurement ranges in monotonicity to change and in institute during threshold value
State and impose a condition during for less than given threshold so that the numerical value of the radio frequency parameter is in distance measurement ranges with human body distance
Monotonicity incremental variations, the human body distance is the distance between human body and the antenna.
Alternatively, the given threshold is number of the radio frequency parameter when the SAR value of human body reaches the higher limit of requirement
Value.
Alternatively, the radio frequency parameter is return loss, voltage standing wave ratio, phase, delay or radiation impedance.
According to the third aspect of the invention we, there is provided a kind of device for entering row distance detection based on antenna, it includes：
Antenna；
Frequency source unit, for selecting the detection radiofrequency signal of frequency to antenna transmission；
Detection unit, the currency of the radio frequency parameter for detecting the antenna transmitting detection radiofrequency signal；And
Processing unit, for the corresponding relation between the numerical value according to the radio frequency parameter and human body distance, it is determined that corresponding
Current human's distance of the currency；
Wherein, the selected frequency is outside the working frequency range of the antenna, and cause the numerical value of the radio frequency parameter with
Human body distance changes in distance measurement ranges in monotonicity, and the human body distance is the distance between human body and the antenna.
Alternatively, described device also includes：
Impedance matching unit, for the resonant frequency of antenna to be adjusted into the selected frequency；
Wherein, the frequency source unit connects sequentially through the detection unit and the impedance matching unit with the antenna
Connect.
Alternatively, described device also includes：
Filter unit, it is connected between the antenna and the detection unit, so that the detection unit, the impedance
Closed loop is formed with unit, the antenna and the filter unit, to adjust the humorous of the antenna by the closed loop
Vibration frequency.
Alternatively, the radio frequency parameter is return loss, voltage standing wave ratio or radiation impedance；
The detection unit, specifically for coupling to obtain incident power when launching the detection radiofrequency signal by antenna
And reflection power, and the radio frequency parameter is calculated according to the incident power and the reflection power
According to the fourth aspect of the invention, there is provided a kind of safety device for entering row distance detection based on antenna, its
Including：
Antenna；
Frequency source unit, for selecting the detection radiofrequency signal of frequency to antenna transmission；
Detection unit, the currency of the radio frequency parameter for detecting the antenna transmitting detection radiofrequency signal；And
Processing unit, in the case of meeting to impose a condition in the currency, reduce the working frequency of the antenna
Maximum conductance power；
Wherein, the selected frequency imposes a condition as more than setting outside the working frequency range of the antenna, and described
Cause the numerical value of the radio frequency parameter successively decreases with human body distance in distance measurement ranges in monotonicity to change and in institute during threshold value
State and impose a condition during for less than given threshold so that the numerical value of the radio frequency parameter is in distance measurement ranges with human body distance
Monotonicity incremental variations, the human body distance is the distance between human body and the antenna.
Alternatively, described device also includes：
Impedance matching unit, for the resonant frequency of antenna to be adjusted into the selected frequency；
Wherein, the frequency source unit connects sequentially through the detection unit and the impedance matching unit with the antenna
Connect.
Alternatively, described device also includes：
Filter unit, it is connected between the antenna and the detection unit, so that the detection unit, the impedance
Closed loop is formed with unit, the antenna and the filter unit, to adjust the humorous of the antenna by the closed loop
Vibration frequency.
Alternatively, the radio frequency parameter is return loss, voltage standing wave ratio or radiation impedance；
The detection unit, specifically for coupling to obtain incident power when launching the detection radiofrequency signal by antenna
And reflection power, and the radio frequency parameter is calculated according to the incident power and the reflection power.
According to the fifth aspect of the invention, there is provided a kind of electronic equipment, it includes dress according to a third aspect of the present invention
Put or device according to a fourth aspect of the present invention.
The beneficial effect of the present invention is that the inventive method, device and electronic equipment are by the use of antenna itself as connecing
Proximity sensor senses human body distance, and the maximum conductance power of the working frequency of antenna can be reduced according to testing result, from
And reduce and even avoid to injury caused by human body, the inventive method, device can be widely applied to mobile communications industry.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiments of the invention, and even
It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is the schematic flow sheet of the method according to embodiments of the present invention for entering row distance detection based on antenna；
Fig. 2 is the flow signal of the safety protecting method according to embodiments of the present invention for entering row distance detection based on antenna
Figure；
Fig. 3 is the theory diagram of the device according to embodiments of the present invention for entering row distance detection based on antenna；
Fig. 4 is the theory diagram of an example of device in Fig. 3；
Fig. 5 is the theory diagram of another example of device in Fig. 3；
Fig. 6 is the change curve between radio frequency parameter and selected frequency and human body distance；
Fig. 7 is the theory diagram of the safety device according to embodiments of the present invention for entering row distance detection based on antenna.
Fig. 8 is the theory diagram of electronic equipment according to embodiments of the present invention.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition
Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The scope of invention.
The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below
And its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
The embodiment of the present invention in order to solve in the prior art using close to antenna set sensor sensing human body whether lean on
A kind of various problems existing for nearly antenna, there is provided technical scheme for entering row distance detection based on antenna itself.
<Method>
First embodiment：
Fig. 1 is the schematic flow sheet of the method according to embodiments of the present invention for entering row distance detection based on antenna.
According to Fig. 1, the inventive method may include steps of：
Step S110, the detection radiofrequency signal of frequency is selected to antenna transmission.
In step S110, the high order of phaselocked loop, frequency-selective network, RF mixer or any crystal oscillator can be passed through
More than the generations such as harmonic wave select the detection radiofrequency signal of frequency.
The selected frequency is outside the working frequency range of antenna, to ensure the operating RF signal of detection radiofrequency signal and antenna
Between there is isolation.
For example, the working frequency range of antenna includes 824MHz~960MHz and 1710MHz~2170MHz, radiofrequency signal is detected
Selected frequency then higher than 960MHz and 1710MHz can be less than less than 824MHz, or the frequency model higher than 2170MHz
Place selection.
For example, the isolation is in more than 30dB, particularly in more than 60dB.
The selected frequency causes antenna to have certain radiation efficiency for detection radiofrequency signal, to enable the antenna to launch
The detection radiofrequency signal.
The selected frequency can cause antenna to launch the numerical value and human body of some radio frequency parameter of the detection radiofrequency signal
Distance changes at least in distance measurement ranges in monotonicity, wherein, human body distance is the distance between human body and antenna.
Monotonicity change can be that the numerical value of radio frequency parameter increases or radio frequency with the reduction of human body distance
The numerical value of parameter reduces with the reduction of human body distance.
The distance measurement ranges are, for example, 0~100mm.
The distance measurement ranges are for example further 0~50mm.
With reference to shown in figure 6, Fig. 6 is the change between radio frequency parameter (return loss S11) and selected frequency and human body distance
Curve map, wherein, in figure abscissa for detection radiofrequency signal selected frequency, ordinate be return loss S11 numerical value, curve
It is 0mm that A, which corresponds to human body distance, and curve B correspond to human body apart from being 10mm, and curve C corresponds to human body apart from being free space, the freedom
Space is, for example, the upper limit for reaching distance measurement ranges.
According to Fig. 6, the resonant frequency (homologous thread A, B, C wave trough position) of antenna is with the reduction of human body distance
And gradually moved to low frequency, on the selected frequency f2 on the left of antenna resonant frequency, return loss (S11) subtracting with human body distance
It is small and be gradually reduced, on the selected frequency f1 on the right side of antenna resonant frequency, return loss (S11) with the reduction of human body distance and
Gradually increase.
Step S120, detection antenna launch the currency of the radio frequency parameter of the detection radiofrequency signal.
Detection in step S120 can be implemented according to selected radio frequency parameter.
The radio frequency parameter for example can be return loss (S11), voltage standing wave ratio (VSWR), phase, delay or radiation
Impedance etc..
Above return loss, voltage standing wave ratio, radiation impedance can launch the detection radiofrequency signal by obtaining antenna
When couple obtained incident power and reflection power is calculated.
In step S120, such as obtained by dual directional coupler when antenna launches the detection radiofrequency signal and couple to obtain
Incident power and reflection power.
Above phase, delay can be realized by the phase detecting circuit of antenna.
Here, each radio frequency parameter that detection antenna launches a certain radiofrequency signal can be realized by various existing means,
This is techniques known, therefore is not described in detail herein.
Step S130, according to the corresponding relation between the numerical value of radio frequency parameter and human body distance, it is determined that corresponding step S120
In obtained current human's distance of the currency of radio frequency parameter.
Corresponding relation between numerical value and the human body distance of radio frequency parameter in step S130 can be advance by testing
It is obtained and stored in memory cell, so that the corresponding relation can be obtained from memory cell when implementing step S130.
In an experiment, each selected human body to be tested distance detection can be directed to and obtain the number of one group of multiple radio frequency parameter
Value, and obtain corresponding each selected human body to be tested by carrying out mean value calculation to the numerical value of one group of multiple radio frequency parameter
The numerical value of the radio frequency parameter of distance.
In an experiment, the human testing of different figures can be passed through further directed to each selected human body distance to be measured
The numerical value of one group of multiple radio frequency parameter is obtained, and is obtained by carrying out mean value calculation to the numerical value of one group of multiple radio frequency parameter
The numerical value of the radio frequency parameter of corresponding each selected human body distance to be tested.
The average value is, for example, arithmetic mean of instantaneous value, geometrical mean or root mean square average etc..
Due to by laboratory facilities obtain reflection radio frequency parameter numerical value and human body distance between corresponding relation number
According to be difficult any human body distance is carried out it is exhaustive, therefore, in step s 130, can according to the numerical value of radio frequency parameter and human body away from
Corresponding relation between, current human's distance of the currency of corresponding radio frequency parameter is determined by interpolation.
For example, the currency of radio frequency parameter is A, the corresponding relation reflected between the numerical value of radio frequency parameter and human body distance
The data that the numerical value for not having radio frequency parameter in data is A, then it can be carried out by couple numerical value A- adjacent with numerical value A and numerical value A+
Linear interpolation obtains the currency A of corresponding radio frequency parameter current human's distance.
Step S130 may further include：Search the table of comparisons of the above-mentioned corresponding relation of reflection prestored, and root
Current human's distance of the corresponding currency is determined according to the table of comparisons.
In the table of comparisons, such as can be according to the numerical value of radio frequency parameter from as low as big or from being put in order to small greatly
The data of the corresponding relation between the numerical value of reflection radio frequency parameter and human body distance are recorded, to facilitate traversal to search.
The method of this embodiment of the invention senses human body distance by the use of antenna itself as proximity sensor, not only structure
Simply, and there is higher detection validity, does not also interfere with the normal work of antenna.
Further, the method for the embodiment of the present invention can also include：According to the current human that step S130 is detected away from
From, judge the current human distance whether be less than setting safe distance threshold value, in this way, then can reduce the working frequency of antenna
Maximum conductance power, even avoid radiation injury to human body to reduce, it is such as no, the working frequency of antenna can be kept most
Big conducted power is constant.
The numerical value that the maximum conductance power is reduced to can be default fixed value.
The numerical value that the maximum conductance power is reduced to can also be the numerical value determined according to current human's distance, for example, can
With according to the electromagnetic wave absorption rate (Specific Absorption Rate, SAR) that maximum conductance power is reduced to human body
Meet that the requirement of index determines the numerical value being reduced to.
The safe distance threshold value can be by testing the higher limit for detecting the SAR value of the human body determined and touching the mark
When human body distance.
Second embodiment：
Fig. 2 is the flow signal of the safety protecting method according to embodiments of the present invention for entering row distance detection based on antenna
Figure.
According to Fig. 2, the method for this embodiment of the invention may include steps of：
Step S210, the detection radiofrequency signal of frequency is selected to antenna transmission.
Specifically, referring to step S110, will not be repeated here.
Step S220, detection antenna launch the currency of the radio frequency parameter of the detection radiofrequency signal.
The radio frequency parameter for example can be return loss, voltage standing wave ratio, phase, delay or radiation impedance.
More than selected frequency outside the working frequency range of antenna, and cause the numerical value of radio frequency parameter with human body distance in distance
Successively decrease in monotonicity in measurement range or incremental variations, human body is apart from being the distance between human body and antenna.
Step S230, the currency for detecting to obtain in step S220 meets in the case of imposing a condition, and reduces antenna
The maximum conductance power of working frequency.
It can be more than given threshold, in another example of the present invention that this, which imposes a condition in the example of the present invention,
In can be less than given threshold.
Specifically, radio frequency parameter numerical value and human body distance successively decrease in distance measurement ranges in monotonicity change when,
Step S230 is：In the case that value is more than given threshold in this prior, the maximum conductance power of the working frequency of antenna is reduced.
And when the numerical value and human body distance of radio frequency parameter are in monotonicity incremental variations in distance measurement ranges, step S230 is：
In the case that value is less than given threshold in this prior, the maximum conductance power of the working frequency of antenna is reduced.
The given threshold can be numerical value of the radio frequency parameter in the higher limit that the SAR value of human body touches the mark, with people
Body distance causes SAR value to meet the maximum conductance power for ensureing antenna in the case of index request.
The given threshold can also be set with reference to numerical value of the radio frequency parameter in the higher limit that the SAR value of human body touches the mark
Put, such as the relative numerical value reserves nargin, to strengthen the protective effect to human body.
The given threshold again may be by laboratory facilities and be obtained ahead of time and store in the memory unit.
The method of this embodiment of the invention is by the use of antenna itself as proximity sensor, and the change for passing through radio frequency parameter
To characterize the change of human body distance, to reduce the work of antenna when the currency of radio frequency parameter is more than or less than given threshold
The maximum conductance power of frequency, so as to reduce or even avoid to injury caused by human body.
<Device>
First embodiment：
Fig. 3 is the theory diagram of the device according to embodiments of the present invention for entering row distance detection based on antenna.
According to Fig. 3, the device of this embodiment of the invention is penetrated including antenna 3300, operating RF unit 3100 and detection
Frequency unit 3200.
Operating RF unit 3100 completes the generation and transmission of working signal, and detection radio frequency unit 3200 is sent out to antenna 3300
The detection radiofrequency signal penetrated beyond a working frequency range, and detect a certain radio frequency ginseng that antenna 3300 launches the detection radiofrequency signal
Several numerical value, to determine current human's distance according to the data.
The detection radio frequency unit 3200 further comprises frequency source unit 3210, detection unit 3220 and processing unit
3230。
Frequency source unit 3210, for transmitting the detection radiofrequency signal of selected frequency to antenna 3300.
Detection unit 3220, the currency of the radio frequency parameter for detecting antenna transmitting detection radiofrequency signal.
Processing unit 3230, for the corresponding relation between the numerical value according to radio frequency parameter and human body distance, it is determined that corresponding
Current human's distance of currency.
The processing unit 3230 is, for example, central processing unit (CPU), microcontroller (MCU) etc..
Selected frequency is outside the working frequency range of antenna 3300 above, and the numerical value of radio frequency parameter and human body distance are existed
Change in distance measurement ranges in monotonicity, wherein, human body distance is the distance between human body and antenna.
Further, the processing unit 3230 can be less than the situation of the safe distance threshold value set in current human's distance
Under, reduce the maximum conductance power of the working frequency of antenna.
Fig. 4 is the theory diagram of an example of device in Fig. 3.
According to Fig. 4, in this example embodiment, detection radio frequency unit 3200 includes frequency source unit 3210, detection unit
3220th, processing unit 3230 and impedance matching unit 3240.
In this example embodiment, frequency source unit 3210 is used for the detection radiofrequency signal that selected frequency is transmitted to antenna 3300.Inspection
Survey the currency that unit 3220 is used to detect the radio frequency parameter that antenna 3300 launches the detection radiofrequency signal.Processing unit 3230 is used
Corresponding relation between the numerical value according to radio frequency parameter and human body distance, it is determined that current human's distance of corresponding currency.Resistance
Anti- matching unit 3240 is used to the resonant frequency of antenna 3300 being adjusted to selected frequency.
In this example embodiment, frequency source unit 3210 is sequentially through detection unit 3220 and impedance matching unit 3240 and antenna
3300 connections.
For example, the working frequency range of operating RF unit 3100 is 824MHz~960MHz, and 1710MHz~2170MHz, base
Device in Fig. 4, the selected frequency of selection detection radiofrequency signal is 1050MHz, so that the selected frequency is located at working frequency range
Outside, and cause numerical value and the human body distance of the radio frequency parameter for the detection radiofrequency signal that antenna 3300 launches in range measurement model
Change in enclosing in monotonicity.
In this example embodiment, radio frequency parameter selection return loss, voltage standing wave ratio or radiation impedance, such as selection echo damage
Consume (S11), frequency source unit 3210 for example produces the detection radiofrequency signal of selected frequency by phaselocked loop, and detection unit 3220 can
With including dual directional coupler, to couple to obtain incident work(when antenna launches the detection radiofrequency signal by dual directional coupler
Rate and reflection power, and and then it is calculated the currency of return loss according to the incident power and transmission power.
Fig. 5 is the theory diagram of another example of device in Fig. 3.
According to Fig. 5, in this example embodiment, apparatus of the present invention also include filter unit on the basis of example shown in Fig. 4
3250。
Filter unit 3250 is connected between antenna 3300 and detection unit 3220 so that detection unit 3220, impedance
Closed loop is formed with unit 3240, antenna 3300 and filter unit 3250, to adjust the resonance frequency of antenna by closed loop
Rate.
In this example embodiment, by set filter unit 3250 can the resonance of antenna 3300 in lower frequency.Example
Such as, the working frequency range of operating RF unit 3100 is 824MHz~960MHz and 1710MHz~2170MHz, then filter unit
3250 can adjust the resonant frequency of closed loop on 400MHz~600MHz, and then can be 400MHz~600MHz's
Lower frequency section determines selected frequency.
Second embodiment：
Fig. 7 is the theory diagram of the safety device according to embodiments of the present invention for entering row distance detection based on antenna.
According to Fig. 7, the safety device of this embodiment of the invention includes antenna 4300 and detection radio frequency unit
4200。
Operating RF unit 4100 completes the generation and transmission of working signal, and detection radio frequency unit 4200 is sent out to antenna 4300
The detection radiofrequency signal penetrated beyond a working frequency range, and detect a certain radio frequency ginseng that antenna 4300 launches the detection radiofrequency signal
Several numerical value, to judge whether current human's distance can cause human body radiation effect according to the numerical value, and it can cause to radiate
The maximum conductance power of the working frequency of antenna 4300 is reduced in the case of influence.
The detection radio frequency unit 4200 further comprises frequency source unit 4210, detection unit 4220 and processing unit
4230。
Frequency source unit 4200 is used for the detection radiofrequency signal that selected frequency is transmitted to antenna 4300.
Detection unit 4220 is used for the currency for detecting the radio frequency parameter of the transmitting detection radiofrequency signal of antenna 4300.
Processing unit 4230 is used for the work that antenna 4300 is reduced in the case where currency is more than or less than given threshold
The maximum conductance power of working frequency.
The given threshold can be numerical value of the radio frequency parameter when the SAR value of human body reaches the higher limit of requirement, in human body
Distance causes SAR value to meet the maximum conductance power for ensureing antenna in the case of index request.
Selected frequency is outside the working frequency range of antenna 4300 above, and the numerical value of radio frequency parameter and human body distance are existed
Change in distance measurement ranges in monotonicity, wherein, human body distance is the distance between human body and antenna.
Specifically, radio frequency parameter numerical value and human body distance successively decrease in distance measurement ranges in monotonicity change when,
Processing unit 4230, which is used for value in this prior, more than in the case of given threshold, reduces the maximum conductance work(of the working frequency of antenna
Rate；And when the numerical value and human body distance of radio frequency parameter are in monotonicity incremental variations in distance measurement ranges, processing unit
4230, which are used for value in this prior, less than in the case of given threshold, reduces the maximum conductance power of the working frequency of antenna.
The main distinction of embodiment illustrated in fig. 7 and embodiment illustrated in fig. 4 is processing unit according to the current of radio frequency parameter
The mode that value is handled is different, and therefore, embodiment illustrated in fig. 7 equally can use the realization of example shown in Fig. 4 to pass through higher-frequency
The design that the detection radiofrequency signal of rate is detected, and realized using example shown in Fig. 5 and believed by the detection radio frequency of lower frequency
Number design detected, is not described in detail herein.
<Equipment>
Fig. 8 is the theory diagram of electronic equipment according to embodiments of the present invention.
According to Fig. 8, the electronic equipment 8000 includes the device in Fig. 3, is marked as device 3000, or including figure
Device in 7, is marked as 4000.
The electronic equipment 8000 can be established with other equipment by antenna such as can be mobile phone, tablet personal computer and communicated
The equipment of connection.
The electronic equipment 8000 of this embodiment of the invention, by setting device 3000 or device 4000, antenna can be utilized
Itself detects human body distance as proximity sensor, and further implements the protective effect of radiation proof to human body.
The electronic equipment 8000 of this embodiment of the invention, above processing unit 3230 or 4230 can be electronic equipments
Master chip or the process chip being separately provided.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point cross-reference, what each embodiment stressed is the difference with other embodiment, and each embodiment
It can be used alone or be combined with each other as needed.
It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport
Best explaining the principle of each embodiment, practical application or to the technological improvement in market, or make the art its
Its those of ordinary skill is understood that each embodiment disclosed herein.The scope of the present invention is defined by the appended claims.
Claims (12)
- A kind of 1. method for entering row distance detection based on antenna, it is characterised in that including：The detection radiofrequency signal of frequency is selected to antenna transmission；Detect the currency of the radio frequency parameter of the antenna transmitting detection radiofrequency signal；According to the corresponding relation between the numerical value of the radio frequency parameter and human body distance, it is determined that the corresponding currency works as forefathers Body distance；Wherein, the selected frequency is outside the working frequency range of the antenna, and causes the numerical value and human body of the radio frequency parameter Distance changes in distance measurement ranges in monotonicity, and the human body distance is the distance between human body and the antenna.
- 2. according to the method for claim 1, it is characterised in that the numerical value according to the radio frequency parameter and human body distance Between corresponding relation, it is determined that current human's distance of the corresponding currency includes：The table of comparisons of the reflection corresponding relation prestored is searched, and the corresponding currency is determined according to the table of comparisons Current human's distance.
- 3. according to the method for claim 1, it is characterised in that methods described also includes：In the case where current human distance is less than the safe distance threshold value of setting, the maximum of the working frequency of antenna is reduced Conducted power.
- A kind of 4. safety protecting method for entering row distance detection based on antenna, it is characterised in that including：The detection radiofrequency signal of frequency is selected to antenna transmission；Detect the currency of the radio frequency parameter of the antenna transmitting detection radiofrequency signal；In the case where the currency meets to impose a condition, the maximum conductance power of the working frequency of the antenna is reduced；Wherein, the selected frequency imposes a condition as more than given threshold outside the working frequency range of the antenna, and described When cause the numerical value of the radio frequency parameter and human body distance are successively decreased in distance measurement ranges in monotonicity change and to set described Cause that the numerical value of the radio frequency parameter and human body distance are in dullness in distance measurement ranges when fixed condition is less than given threshold Property incremental variations, human body distance is the distance between human body and the antenna.
- 5. according to the method for claim 4, it is characterised in that the given threshold is the radio frequency parameter in human body SAR value reaches the numerical value during higher limit of requirement.
- 6. method according to any one of claim 1 to 5, it is characterised in that the radio frequency parameter is return loss, electricity Press standing-wave ratio, phase, delay or radiation impedance.
- A kind of 7. device for entering row distance detection based on antenna, it is characterised in that including：Antenna；Frequency source unit, for selecting the detection radiofrequency signal of frequency to antenna transmission；Detection unit, the currency of the radio frequency parameter for detecting the antenna transmitting detection radiofrequency signal；AndProcessing unit, for the corresponding relation between the numerical value according to the radio frequency parameter and human body distance, it is determined that described in corresponding Current human's distance of currency；Wherein, the selected frequency is outside the working frequency range of the antenna, and causes the numerical value and human body of the radio frequency parameter Distance changes in distance measurement ranges in monotonicity, and the human body distance is the distance between human body and the antenna.
- A kind of 8. safety device for entering row distance detection based on antenna, it is characterised in that including：Antenna；Frequency source unit, for selecting the detection radiofrequency signal of frequency to antenna transmission；Detection unit, the currency of the radio frequency parameter for detecting the antenna transmitting detection radiofrequency signal；AndProcessing unit, in the case of meeting to impose a condition in the currency, reduce the working frequency of the antenna most Big conducted power；Wherein, the selected frequency imposes a condition as more than given threshold outside the working frequency range of the antenna, and described When cause the numerical value of the radio frequency parameter and human body distance are successively decreased in distance measurement ranges in monotonicity change and to set described Cause that the numerical value of the radio frequency parameter and human body distance are in dullness in distance measurement ranges when fixed condition is less than given threshold Property incremental variations, human body distance is the distance between human body and the antenna.
- 9. the device according to claim 7 or 8, it is characterised in that described device also includes：Impedance matching unit, for the resonant frequency of antenna to be adjusted into the selected frequency；Wherein, the frequency source unit is connected sequentially through the detection unit and the impedance matching unit with the antenna.
- 10. device according to claim 9, it is characterised in that described device also includes：Filter unit, it is connected between the antenna and the detection unit, so that the detection unit, the impedance matching list First, described antenna forms closed loop with the filter unit, to adjust the resonance frequency of the antenna by the closed loop Rate.
- 11. device according to claim 9, it is characterised in that the radio frequency parameter be return loss, voltage standing wave ratio or Person's radiation impedance；The detection unit, specifically for coupling to obtain incident power and anti-when launching the detection radiofrequency signal by antenna Power is penetrated, and the radio frequency parameter is calculated according to the incident power and the reflection power.
- 12. a kind of electronic equipment, it is characterised in that including the device any one of claim 7 to 11.
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