CN107655564A - A kind of indoor and outdoor surroundingses detection method of the multiple technologies fusion based on intelligent terminal - Google Patents
A kind of indoor and outdoor surroundingses detection method of the multiple technologies fusion based on intelligent terminal Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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Abstract
The invention discloses a kind of indoor and outdoor surroundingses detection method of the multiple technologies fusion based on intelligent terminal, the sensor carried using smart machine carries out indoor and outdoor surroundingses identification, the detection method includes three sub- detectors, wherein photodetector obtains the light intensity of surrounding environment using optical sensor, with range sensor and temporal information cooperative detection, magnetic field detector and base station cell detector judge by magnetic field intensity and cellular signal change respectively, the present invention and the adaptive threshold that the indoor and outdoor detection of three of the above mode is designed according to specific environment, and speculate the indoor and outdoor confidence level under various modes, then the weights of design flexibility, obtain indoor and outdoor judged result, so as to select different location mechanisms accordingly.The present invention need not expend great amount of cost increases peripheral hardware identification module to equipment, and compared with relying solely on the detection method of certain sub- detector, the accuracy rate of the joint-detection of fusion multiple technologies proposed by the present invention is higher.
Description
Technical field
The invention belongs to Context awareness and field of locating technology, is related to a kind of multiple technologies fusion based on intelligent terminal
Indoor and outdoor surroundingses detection method.
Background technology
Differentiation for residing varying environment, especially indoor and outdoors, the scheme of used positioning have very big
Difference.The principle for adapting to specific environment is followed, then takes corresponding positioning method, can equally reach and significantly save energy
Purpose, therefore indoor and outdoor identification has very great help to energy-conservation positioning.Moreover, indoor and outdoor surroundingses detection can also be to dependent on scene
The service of environment such as scene activity perception and image recognition etc. provide guiding opinion.
At present, common indoor and outdoor differentiating method respectively has the advantages of corresponding and drawback, is divided into following several:The first is special
Different agent approach, i.e., by increasing peripheral module, such as the module with identification function, to carry out the identification of two kinds of scenes.Although
This method can reach corresponding purpose, but need to spend higher cost to be disposed in the incipient stage, facility cost ratio
It is higher, so as to have impact on widely using for system.Second method is fingerprint technique, i.e., the information gathered in surrounding environment is carried out
Fingerprint collecting, then matched and modeled with general matching method, finally constantly corrected according to the feedback result under different clients different scenes
And recognition result.Obviously, there is the problem of fingerprint collecting is taken considerable time with user's energy, and processing server in this method
Need to store mass data to respond the request of user, therefore, it is difficult to widely use in actual applications.The third is that pattern is known
Other method, this method differentiate indoor and outdoor scene according to the image information of pattern-recognition.The pattern-recongnition method needs very high calculating
Complexity and manual interaction between user is required, scene is identified based on collected video image, therefore also do not possess
Universality.
The generally built-in many sensors of intelligent terminal, the energy that these sensors largely consume is seldom, and need not
Extra cost consumption, therefore the data that can be returned to sensor are handled to realize various functions.In the prior art, also
Intelligent terminal is not applied to the precedent in indoor and outdoor differentiation field.
The content of the invention
Present invention aims in view of the shortcomings of the prior art, it is proposed that a kind of indoor and outdoor surroundingses using built-in sensors
Detection method, this method need not expend great amount of cost and give equipment increase peripheral hardware identification module, it is not required that it is substantial amounts of calculate into
Row mode identifies or expends a large amount of manpower and materials collection fingerprints, and the sensor that this method is carried using equipment carries out indoor outer shroud
Border identifies, although what every kind of detector can be independent detects residing indoor and outdoor surroundingses, is single use a certain kind and has one
A little factors influence and influence judgment accuracy, therefore the method that the present invention takes these three sub- detector fusions, according to specific ring
Border is using adaptive threshold and the method for adaptability weights.
For this purpose, the technical solution used in the present invention is a kind of interior of the multiple technologies fusion based on intelligent terminal
External environment detection method, specifically comprises the following steps：
Step 1：The sensing data of intelligent terminal photo-detector, geomagnetism detecting device and cellular signal detector is obtained, and
Equipment outdoor confidence level indoors is deduced, it is specific as follows：
Step 1-1：The result of photodetector obtains：By means of the optical sensor built in terminal device, indoor outer shroud is obtained
The real-time light intensity in border, change by these light intensity, the threshold value for finding out suitable light intensity carrys out scene inside and outside divided chamber, and draws interior
With the detection confidence level of outdoor；
Step 1-2：The result of geomagnetism detecting device obtains：Can not be indoor effective for detection using field strength value size
Outer change, but the change size of magnetic field intensity is obtained for the obvious principle of discrimination of indoor and outdoor scene by geomagnetism detecting device
Go out the detection confidence level of indoor and outdoors；
Step 1-3：The result of base station signal detector obtains：Using the mutation of cellular signal strength come in divided chamber/room
External environment, base station signal detector draw the detection confidence level of indoor and outdoors；
Step 2：Joint-detection is carried out, including：
Step 2-1：The confidence level of indoor and outdoors is distinguished into weighted sum；
Step 2-2：Compare the size that indoor and outdoors are summed, if indoor weighted sum is more than outdoor weighted sum,
Then final result of determination is that current device is located at indoor environment, otherwise it is assumed that the equipment is in outdoor.
Further, above-mentioned steps 1-1 comprises the following steps again：
The first step, verify whether optical sensor can use by Proximity Sensor；
Second step, as optical signal can use, then temporal information is obtained at time clock and is believed from Network Capture sunrise and sunset
Breath；As optical signal is unavailable, then obtained a result without using the data of optical sensor；
3rd step, time and sunrise sunset information with acquisition, change with reference to light intensity, obtain the light intensity threshold that indoor and outdoor is distinguished
Value, the detection confidence level of indoor and outdoor is drawn according to threshold value.
Further, above-mentioned steps 1-2 comprises the following steps：
The first step, test draw optimal magnetic field intensity variance threshold values；
Second step, with this threshold decision local environment.
Further, above-mentioned steps 1-3 includes：The front and rear time-ofday signals strength difference of each base station signal strength is calculated, if
The threshold value for determining difference is v, if the absolute difference is more than threshold value and to be increased, is increased in outdoor possibility, such as
Fruit absolute difference is more than threshold value and for what is reduced, then in indoor possibility increase, the process is repeated to each base station, comprehensive
The measurement data for closing multiple base stations draws final testing result.
Further, above-mentioned steps 2-1 is specifically included：Applicability parameter is set according to real-time contextual, light, earth magnetism are set respectively
Applicability parameter with three detection species of base station signal is respectively a1, a2, a3, and respective weights are expressed as w1, w2,
w3, value expression formula can be expressed asWherein 1<K≤n, wkRepresent the weights of k-th of index, akTable
Show applicability parameter, herein n=3, after setting weights, indoor total confidence level and outdoor confidence level can be expressed as Wherein CK, indoorWith
CK, outdoorRepresent possibility probability of the kth index indoors with outdoor.
Finally to CIndoor, alwaysAnd COutdoor, alwaysNumerical values recited be compared, that larger side has higher possibility
Property, thus judge residing environment.
Compared with prior art, beneficial effects of the present invention：
1st, the present invention uses the built-in sensors of mobile terminal, and low energy consumption and at low cost mobile phone sensor data are used for room
Inside and outside detection, data to be tested can be easily obtained, reduce the loss of manpower and materials.
2nd, present invention employs the method for joint-detection, the drawbacks of avoiding independent detection, a variety of detectors have been combined
Advantage, improve overall detection accuracy.
3rd, the method that the present invention uses accommodation, the Intensity threshold of test and each detection are adjusted as the case may be
The applicability parameter value of device, has good adaptability to environment, can improve overall detection efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of present system.
Fig. 2 is using the schematic diagram of adaptability photodetector detection in invention.
Fig. 3 is the geomagnetism detecting device flow graph used in invention.
Fig. 4 is the base station signal detector flow used in invention.
Fig. 5 is the schematic diagram of applicability parameter adjustment.
Embodiment
Below in conjunction with Figure of description, the present invention is described in further detail.
The system structure diagram of the present invention is light, magnetic respectively as shown in figure 1, intelligent terminal includes three sub- detectors
And cellular signal detector, wherein photodetector using optical sensor obtain surrounding environment light intensity, and range sensor with
And the detection of time Information Cooperation, magnetic field detector and base station cell detector come by magnetic field intensity and cellular signal change respectively
Judge, the present invention and the adaptive threshold that the indoor and outdoor detection of three of the above mode is designed according to specific environment, and speculate various
The weights of indoor and outdoor confidence level, then design flexibility under mode, indoor and outdoor judged result is obtained, so as to select accordingly not
Same location mechanism.
The variance ratio light intensity of light intensity has more the discrimination of indoor and outdoor surroundingses in itself.This method can set a sliding window
Mouth sequence length is TsThe data of the light intensity gathered from mobile phone, are then put into the queue, calculated simultaneously by (such as 15 seconds)
The variance of the queue.Again by the result drawn compared with the light intensity change threshold (such as 1000Lux) set, if desired value is more than
Light intensity change threshold, then current environment is judged for outdoor, that is, outdoor confidence level is 1；If desired value is less than the threshold of the setting
Value, but light intensity variance is in continuous decline/ascendant trend, then is also determined as outdoor environment.Otherwise following heuristic is used
To speculate the confidence level of indoor and outdoors.
Certain regularity is presented in the change of light intensity in considering one day, and the time of one day is divided into each different time
Section, and to the period of each different rules, accommodation is used to differentiate the Intensity threshold compared.The light intensity change of one day is near
Like linear change, and using sunrise and sunset time as starting point and end point, in conjunction with largest light intensity value, when calculating each
Between section Intensity threshold.Daily sunrise and sunset time can be learnt in advance：Can take setting general-purpose default value or
Under the premise of network is available, from the sunrise in Network Capture Weather information and sunset time, also or directly with from terminal device
The latitude and longitude coordinates of acquisition calculate sunrise and the sunset time on the same day.
Assuming that:The sunrise time of current device Location is Tu, sunset time Td.Intensity threshold is μ, light in one day
It is μ according to maximum intensity1, current time is t (unit is hour), and it is L to survey intensity of illumination.
The period of 2 hours after from sunrise half an hour after to sunrise, Intensity threshold μ linear increases to μ1(under indoor environment
Largest light intensity μ1=1000Lux), i.e.,Wherein t ∈ (Tu+ 1/2, Tu+ 2), μ ∈ (0, μ1)；Interlude
Section, Intensity threshold are constant.I.e. after sunrise 2 hours 2 hours before sunset, Intensity threshold μ=μ1, wherein t ∈ (Tu+ 2, Td-
2)；
The final stage time, with the first paragraph time since before sunset 2 hours, until 0.5 hour light intensity is linear before sunset
Decline.Intensity threshold μ t over time change, from largest light intensity μ1To 0 linear decrease, i.e.,: Wherein, t ∈ (Td- 2, Td-1/2)。
More than in the case of these three, light intensity L is compared with the threshold value μ calculated, if judging the probability of interior for I, then:I
=1, L>μ；L≤μ
In half an hour after sunrise and before sunset, indoor and outdoor light intensity value is close, it is not possible to which simple relatively size judges indoor
Outside.It will be appreciated, however, that this time, outdoor luminous intensity has more stable crescendo in the longer time that compares
Or the changing rule of diminuendo, the rule can be used for judging whether it is in outdoor.
Night hours are that sunset starts to second day sunrise end time section.Ordinary circumstance, due to light intensity when outdoor is without lamp
It is zero, interior is turned on light, and indoor light is stronger than outdoor light.Although outdoor may have the influence of the factors such as street lamp, car light, due to
Research shows, the time of the mankind 80% indoors, it can be considered that possibility indoors is larger.If the threshold value in this stage is
μ2.Work as L>μ2, indoor general I=p1∈[0.8,0.9],t∈(Td,Tu)；
Work as L<μ2, and in a period of time in sunset all late into the night, smaller threshold value μ is set3And μ4(μ2>μ3>μ4),
Work as μ3<L<μ2, indoor probability I=p2∈[0.7,0.8]；Work as μ4<L<μ3, indoor probability I=p3∈[0.6,0.7]；
As L≤μ4, indoor probability I=p4∈[0.3,0.4]；
Work as L<μ2, and within the late into the night to a period of time at dawn, indoor probability I=p1∈[0.8,0.9]；
It is worth noting that, Intensity threshold μ1, μ2, μ3, μ4Value be by reality indoor environment obtained by light intensity data
Analysis of experimental results obtain.Generally, actually can be by the threshold value μ of light intensity1It is set to 1000Lux or so.The late into the night sets boundary
It is limited at 10 points at night, and threshold value μ2It could be arranged to 30lux, μ3It could be arranged to 20lux, μ4It could be arranged to 10lux.Adapt to
Property adjustment after photodetector flow chart it is as shown in Figure 2.
Generally, field strength value size can not be used to change inside and outside sensing chamber, but the change size of magnetic field intensity
It is obvious for the discrimination of indoor and outdoor scene.Generally, indoor magnetic field intensity variance yields than outdoor be higher by a lot, in order to
Reduce the accuracy of some noise errors and judged result, can using the mode of sliding window average value to draw one section when
Between magnetic field intensity variance.And by selecting appropriate threshold come in divided chamber and outdoor environment.In the present invention, passed using from magnetic field
The magnetic field strength date that sensor is collected into, collection and calculating cycle are once per second, and the field strength values of gained are stored in and set
In fixed sliding window, if it is 20 to set sliding window size, the magnetic field collected during explanation is saved first 20 seconds
Data.Then the variance in the sliding window of 20 seconds is calculated, preserves variance to another sliding window, for example be arranged to 25
Individual variance namely sliding window size are 25, and calculating mean of variance is A.Changes of magnetic field variance threshold values are set as F, indoor and room
External magnetic field change variance threshold values are S1And S2.If A is more than F, and A*A/S1When≤1, the confidence level I=A*A/S of interior is drawn1,
If A*A/S1>1, then indoor confidence level I=1；Because outdoor confidence level and indoor confidence level and be 1, outdoor confidence
The size for spending O is 1-I., whereas if A is less than or equal to F, and A*A/S2When≤1, the confidence level O=A*A/S of outdoor is drawn1If
A*A/S2>1, then outdoor confidence level O=1；Similarly, outdoor confidence level I value is 1-O.Wherein changes of magnetic field variance threshold values
For F, indoor and outdoors changes of magnetic field variance threshold values are S1And S2Value can be according to specific experiment, the different selections actually built
Suitable empirical value.The flow chart of specific steps is as shown in Figure 3.
The idiographic flow that indoor and outdoor detection is carried out using multiple base station informations is as shown in Figure 4：Calculate each base station signal
The front and rear time-ofday signals strength difference of intensity, the threshold value of difference is set as v, if the absolute difference is more than threshold value and to increase
, then in outdoor possibility increase, if absolute difference is more than threshold value and is what is reduced, in indoor possibility
Increase.The process is repeated to each base station, the measurement data of comprehensive multiple base stations draws final testing result.
Assuming that R will be expressed as in received signal strength RSS of the time t from cellular basestation ii(t), wherein 1≤i≤
N, n represent base station number.RSS changes are tracked in time interval Δ, and i change in signal strength is expressed as Vi(t)=Ri(t+
Δ)-Ri(t).By N+(t) quantity of cellular basestation of the RSS increases more than v, i.e. N are expressed as+(t)=| i | Vi(t)≥v,0≤i
≤n}|；N-(t) represent that its RSS reduces the quantity of the cellular basestation more than v, namely N-(t)=| i | Vi(t)≤-v,0≤i≤
n}|.In some cases, it also can be appreciated that N+(t)+N-(t)≤n, that is the RSS holding quite stables because many cell towers, and
And difference is no more than v.Define N0(t)=n-N+(t)-N-(t) represent that cell tower obtains signal intensity RSS stability.In reality
In testing, default value may be configured as Δ=10s and v=15dB.
Obviously, if user is moved to outdoor environment from indoor environment, the signal intensity that cellular basestation receives will increase,
Vice versa.In addition, the trend identical number of base stations that the signal intensity obtained is showed is more, testing result is more accurate
Really, it is possible thereby to set different confidence levels to testing result.Assuming that work as n=6, N0(t)=1, N+(t)=1, N-(t) when=4,
Cellular signal determines that surrounding environment is that indoor confidence level is CCI=N-(t)/n=0.67, it is defined as the confidence level of outdoor environment
For CCO=N+(t)/n=0.17.
The weights (applicability parameter) of each sub- detector should adjust according to the dynamic such as time or other environmental factors,
To improve the accuracy of whole detection system.The present invention analyzes several frequently seen weighed value adjusting scheme.
First, from the foregoing it will be appreciated that the degree of accuracy of time residing in one day when optical sensor is to measurement is very different.When
During sunny daytime, Proximity Sensor judges that available (if proximity transducer is judged as unavailable, the weights of optical sensor are
0) accuracy rate, then judged using optical sensor is bigger, gives its bigger weights.As optical signal adaptability parameter is set to
5, base station signal is set to 3, and earth magnetism is set to 2.So setting is to have degree of accuracy during each sensor independent measurement to determine,
That is experiment measures sunny daytime, the degree of accuracy order of each sub- detector is from high to low：Light, base station and earth magnetism.And too
Sun set after in the time before sunrise in second day, differentiation of the light intensity to indoor and outdoor is obvious not as daytime, optical sensor detection
Accuracy, this method should reduce the applicability parameter value of optical sensor, for example it is 1 to set photodetector, base station signal
Detector is 5, and earth magnetism is 4 etc..Work as bad weather, during such as rainy days or haze sky, the detection accuracy of optical sensor also can under
Drop, relatively low applicability parameter value should be also set, for example it is 2 to set optical module, magnetic module is 3, and base station signal module is 5, and
Keep numerical value constant.
Secondly, when the confidence level of in a certain Ge Zi sensing chamber or outdoor in detection module is 1, the standard of the detector is shown
Exactness is very high, should lift the applicability parameter value of the sub- detector, increase its weighted value.
The structure chart of applicability parameter value adjustment is illustrated in figure 5, each sub- detector can be obtained according to adaptability parameter
Detection weights, draw total confidence level, finally draw the result of determination of indoor and outdoor surroundingses.
Claims (6)
- A kind of 1. indoor and outdoor surroundingses detection method of the multiple technologies fusion based on intelligent terminal, it is characterised in that methods described Comprise the following steps：Step 1：The sensing data of intelligent terminal photo-detector, geomagnetism detecting device and cellular signal detector is obtained, and is speculated Go out equipment outdoor confidence level indoors, it is specific as follows：Step 1-1：The result of photodetector obtains：By means of the optical sensor built in terminal device, indoor and outdoor surroundingses are obtained Real-time light intensity, change by these light intensity, the threshold value for finding out suitable light intensity carrys out scene inside and outside divided chamber, and draws indoor and room Outer detection confidence level；Step 1-2：The result of geomagnetism detecting device obtains：Can not be effective for becoming inside and outside sensing chamber using field strength value size Change, but the change size of magnetic field intensity draws room for the obvious principle of discrimination of indoor and outdoor scene by geomagnetism detecting device Interior and outdoor detection confidence level；Step 1-3：The result of base station signal detector obtains：Indoor/outdoor ring is distinguished using the mutation of cellular signal strength Border, base station signal detector draw the detection confidence level of indoor and outdoors；Step 2：Joint-detection is carried out, including：Step 2-1：The confidence level of indoor and outdoors is distinguished into weighted sum；Step 2-2：Compare the size that indoor and outdoors are summed, if indoor weighted sum is more than outdoor weighted sum, most Whole result of determination is that current device is located at indoor environment, otherwise it is assumed that the equipment is in outdoor.
- 2. the indoor and outdoor surroundingses detection method of the multiple technologies fusion according to claim 1 based on intelligent terminal, it is special Sign is that the step 1-1 comprises the following steps again：The first step, verify whether optical sensor can use by Proximity Sensor；Second step, as optical signal can use, then temporal information is obtained at time clock and from Network Capture sunrise and sunset information；Such as Optical signal is unavailable, then is obtained a result without using the data of optical sensor；3rd step, time and sunrise sunset information with acquisition, change with reference to light intensity, obtain the Intensity threshold that indoor and outdoor is distinguished, The detection confidence level of indoor and outdoor is drawn according to threshold value.
- 3. the indoor and outdoor surroundingses detection method of the multiple technologies fusion according to claim 1 based on intelligent terminal, it is special Sign is that the step 1-2 comprises the following steps：The first step, test draw optimal magnetic field intensity variance threshold values；Second step, with this threshold decision local environment.
- 4. the indoor and outdoor surroundingses detection method of the multiple technologies fusion according to claim 1 based on intelligent terminal, it is special Sign is：The step 1-3 includes：The front and rear time-ofday signals strength difference of each base station signal strength is calculated, sets difference Threshold value is v, if the absolute difference is more than threshold value and to be increased, in outdoor possibility increase, if difference is exhausted To being worth more than threshold value and for what is reduced, then in indoor possibility increase, the process, comprehensive multiple bases being repeated to each base station The measurement data stood draws final testing result.
- 5. the indoor and outdoor surroundingses detection method of the multiple technologies fusion according to claim 1 based on intelligent terminal, it is special Sign is that the step 2-1 is specifically included：Applicability parameter is set according to real-time contextual, light, earth magnetism and base station letter are set respectively The applicability parameters of numbers three detection species are respectively a1, a2, a3, and respective weights are expressed as w1, w2, w3, value table It can be expressed as up to formulaWherein 1<K≤n, wkRepresent the weights of k-th of index, akRepresent applicability Parameter, indoor total confidence level and outdoor confidence level, after setting weights, can be expressed as by n=3 herein Wherein CK, indoorAnd CK, outdoorRepresent the K indexs indoors with outdoor possibility probability.
- 6. the indoor and outdoor surroundingses detection method of the multiple technologies fusion according to claim 5 based on intelligent terminal, it is special Sign is, to CIndoor, alwaysAnd COutdoor, alwaysNumerical values recited be compared, that larger side has higher possibility, thus Judge residing environment.
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| CN110220550A (en) * | 2018-03-02 | 2019-09-10 | 罗伯特·博世有限公司 | Method and apparatus, control unit and portable equipment for indoor/outdoor detection |
| CN110062326A (en) * | 2019-04-08 | 2019-07-26 | 上海交通大学 | A kind of positioning of automobile-used blue-tooth intelligence key and inside and outside discrimination method |
| CN110062326B (en) * | 2019-04-08 | 2021-02-09 | 上海交通大学 | Positioning and internal and external identification method of vehicle Bluetooth intelligent key |
| CN110412776A (en) * | 2019-06-18 | 2019-11-05 | 北京艾索健康科技有限公司 | A kind of eye protector and method detecting indoor and outdoor surroundings |
| CN110779567A (en) * | 2019-11-04 | 2020-02-11 | 浙江工业大学 | Indoor and outdoor scene recognition method based on multi-module fusion |
| CN112015106A (en) * | 2020-09-22 | 2020-12-01 | 中用科技有限公司 | Smart home control system and control method |
| CN112287296A (en) * | 2020-10-13 | 2021-01-29 | 北京师范大学 | Surface water heat flux measuring and calculating method based on dual-waveband scintillation instrument |
| CN112287296B (en) * | 2020-10-13 | 2023-05-26 | 北京师范大学 | Surface water heat flux measuring and calculating method based on dual-band scintillator |
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