CN108594174A - Wavelength-encoding indoor locating system and method based on infrared optical dispersion - Google Patents
Wavelength-encoding indoor locating system and method based on infrared optical dispersion Download PDFInfo
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- CN108594174A CN108594174A CN201810020178.0A CN201810020178A CN108594174A CN 108594174 A CN108594174 A CN 108594174A CN 201810020178 A CN201810020178 A CN 201810020178A CN 108594174 A CN108594174 A CN 108594174A
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- infrared light
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/16—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
Abstract
Include position indicator, photodetector and processor the invention discloses a kind of Wavelength-encoding indoor locating system based on infrared optical dispersion;The position indicator includes infrared light supply and dispersion prism, and photodetector includes wireless transport module;The processor includes computer.The present invention also provides a kind of Wavelength-encoding indoor orientation methods based on infrared optical dispersion, include the following steps:First infrared light supply sends out the infrared light of vertical direction;Second infrared light supply sends out the infrared light of horizontal direction;Infrared light vertically and horizontally is covered with space after the first dispersion prism and the second dispersion prism dispersion;Photodetector detects infrared signal, and the wavelength information of infrared signal is converted to electric signal and is sent to computer;Computer carries out Wavelength-encoding to the electric signal for carrying infrared waves long message, obtains the location information of positioning object.The present invention realizes indoor object precise positioning.
Description
Technical field
The present invention relates to indoor technical field more particularly to a kind of Wavelength-encoding indoor positioning systems based on infrared optical dispersion
System and method.
Background technology
Currently, with the raising of scientific and technological level, no matter work or trip, positioning system has become in people's life not
The part that can or lack.Early stage positioning system is applied to military aspect, with the improvement of the quality of life, global positioning system
(Global Positioning System abbreviation GPS) is begun to appear in people’s lives, and spreads to each neck of society
Domain, for example, auto-navigation system, road engineering, traffic administration and smart mobile phone positioning function etc..As it can be seen that " positioning " has been walked
Into huge numbers of families, present GPS navigation system can not only shift to an earlier date programme path, but also can feed back real-time road, greatly
Facilitate the trip of people.But GPS is primarily adapted for use in unobstructed environment, and the positioning signal of transmission can not penetrate building,
Therefore it is commonly used in outdoor.When environment can not use progress satellite positioning indoors, indoor positioning technologies can be used, solve to defend
Star signal is weaker when reaching ground, cannot penetrate the problem of building.
In recent years, the positioning accuracy due to outdoor positioning is relatively low, error is larger, much can not meet the need of the mankind
It asks, becomes to make the more life of high-quality and more intelligent service, positioning, that is, indoor positioning of some large areas
The hot spot of research.Indoor positioning tourist attraction and museum realize the Public Service Fields such as locating guide, showpiece introduction, airport guide
On have great application market and development prospect.The indoor positioning technologies being widely used at present include mainly Wi-Fi positioning, indigo plant
Tooth positioning, ultrasonic wave positioning and computer vision positioning, wherein Wi-Fi positioning, because Wi-Fi has been prevalent in many public
Occasion, cost are relatively low to be widely used in many fields, but Wi-Fi positioning is highly susceptible to the interference of other electromagnetic waves, can make
Its precision reduces;The precision of bluetooth localization method is higher, but related equipment manufacturing cost is expensive, at the same orientation distance receive it is prodigious
Limitation, cannot achieve the positioning of larger space;Ultrasonic wave positioning can also be influenced by peripheral obstacle and multipath effect, to
Reduce its accuracy;Computer vision positioning requirements video camera needs to find in photographic subjects object appropriate angle could be into
Row is accurately positioned, it should which needs continue to improve.In order to solve the above problem, the present invention provides a kind of waves based on infrared optical dispersion
Long codes indoor locating system and method can accurately position object.
Invention content
The present invention in view of the shortcomings of the prior art and defect, provides a kind of Wavelength-encoding room based on infrared optical dispersion
Interior positioning system and method realizes indoor object precise positioning.
In order to achieve the object, the technical solution adopted in the present invention is:
A kind of Wavelength-encoding indoor locating system based on infrared optical dispersion, including position indicator, photodetector and processor;Institute
It includes infrared light supply and dispersion prism to state position indicator, and the infrared light supply is infrared ray wideband light source, the infrared light supply packet
The first infrared light supply and the second infrared light supply are included, first infrared light supply is laid vertically, the horizontal cloth of the second infrared light supply
If one end of one end of the first infrared light supply and the second infrared light supply intersects at a upper vertex in space, and by the upper top
Point is defined as origin;The side of first infrared light supply is parallel to be laid with the first dispersion prism, second infrared light supply
Parallel beneath be laid with the second dispersion prism, any surface difference of the first dispersion prism and the second dispersion prism
It is parallel with the first infrared light supply and the second infrared light supply;The number of the photodetector is four, the photodetector cloth
It is located at being on four points in same plane for positioning body surface;The photodetector includes wireless transport module;
The processor includes computer.
Further, the wave band of first infrared light supply is 800~1200nm;The wave band of second infrared light supply is
1400~1800nm.
Further, the first dispersion prism and the second dispersion prism are in same plane;Described first is red
Outer light source and the horizontal distance of the first dispersion prism, the second infrared light supply and the second dispersion prism are 0.5cm.
Further, the infrared light supply, the infrared light for sending out different-waveband;
The dispersion prism is covered for infrared light supply to be dispersed into different infrared lights in space.
Further, the photodetector is converted to telecommunications for detecting infrared signal, and by infrared signal
Number, electric signal is sent to processor by wireless transport module;
The processor, for receiving electric signal, and it is carried out processing calculate place's photodetector coordinate, to obtain
Position the location information of object.
Based on a kind of a kind of wave based on infrared optical dispersion of the Wavelength-encoding indoor locating system based on infrared optical dispersion
Long codes indoor orientation method, includes the following steps:
Step 1:First infrared light supply sends out the infrared light of vertical direction;Second infrared light supply sends out the infrared light of horizontal direction;
Step 2:The infrared light of vertical direction is covered with space after the first dispersion prism dispersion;The infrared light of horizontal direction is through
It is covered with space after two dispersion prism dispersions;
Step 3:Photodetector detection is converted to electricity by the infrared signal of itself, and by the wavelength information of infrared signal
Signal is sent to computer by wireless transport module;
Step 4:Computer carries out Wavelength-encoding to the electric signal for carrying infrared waves long message, is determined according to coding information
The location information of position object.
Further, the infrared light of vertical direction is sent out in the first infrared light supply;Second infrared light supply sends out horizontal direction
Infrared light before, further include:The above vertex is origin, and xyz three-dimensional system of coordinates are established in located space;Horizontal direction it is red
Outer light is by any point in space, angle of this with z-axis direction after xOz plane projectionsThe infrared light of vertical direction
By any point in space, it is θ with the angle of x-axis direction after xOy plane projections to define this, in definition space any point away from
The distance of coordinate origin is r, and the coordinate of any point is in space
Further, the step 3 specifically includes:Each photodetector detects horizontal direction and vertical direction respectively
Infrared light;And infrared signal is converted into electric signal, computer is sent to by wireless transport module.
Further, the step 4 specifically includes:
Set the coordinate of each photodetector point as
The distance of the photodetector between any two is d0, d1, d2, d3, d4, d5;
Computer carries out Wavelength-encoding to the infrared signal received, obtains photodetector pointWith θ values;
According to relationship between the coordinate of each photodetector point, equation is established, r values are obtained by solving, to obtain
Position the location information of object.
The beneficial effects of the invention are as follows:
The present invention is based on the Wavelength-encoding indoor locating system of infrared optical dispersion and method positioning accuracy height, more accurately, this hair
For bright middle positioning method error magnitude in millimeter, micron order, the error of the method is small;And it is not easy dry by visible light and radio magnetic wave
It disturbs;The light that light source is sent out in localization method of the present invention is the infrared light of different-waveband, after dispersing prism carries out wavelength separated
Light be not easy to be interfered by visible light and common radio magnetic wave;On the one hand, it is seen that the wavelength of light and infrared light has apparent poor
It is different;On the other hand, the frequency such as wi-fi radio magnetic waves is relatively low, and wavelength differs 5 orders of magnitude or more with infrared waves length,
More stable and cost performance higher when therefore working;Dispersing prism material therefor is market common materials in the present invention, and photoelectricity is visited
Survey device is common wavelength verifying attachment, and price is cheap, and technology used is simpler;The present invention positions real-time.Phase
Than in other localization methods, positioning real-time of the invention is stronger, due to the maturation of Techniques of wavelength detection, makes location information more
New speed faster, can realize the location information for the positioning object that timely updates, at the same carry it is convenient, it is easy to use;The present invention's
Whole system small volume, power consumption condition is good, easy to operate, and infrared light supply can be installed aloft, such as ceiling or corner, fit
For the moving object in located space.Strong applicability;It is equal for different volumes, different shape, the object of different motion state
It is applicable in, any object can be positioned, and positioning device is flexible.
Description of the drawings
Fig. 1 is the structural schematic diagram of the Wavelength-encoding indoor locating system the present invention is based on infrared optical dispersion.
Fig. 2 is the structural representation of the infrared light supply of the Wavelength-encoding indoor locating system the present invention is based on infrared optical dispersion
Figure.
Fig. 3 is sectional view along A-A in Wavelength-encoding indoor locating system Fig. 2 the present invention is based on infrared optical dispersion.
Fig. 4 is the schematic diagram the present invention is based on the Wavelength-encoding indoor locating system of infrared optical dispersion and embodiment of the method 2.
Fig. 5 is the schematic diagram the present invention is based on the Wavelength-encoding indoor locating system of infrared optical dispersion and embodiment of the method 2.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific implementation mode present invention is further described in detail:
Embodiment 1:As shown in FIG. 1 to 3, a kind of Wavelength-encoding indoor locating system based on infrared optical dispersion, including positioning
Instrument 100, photodetector 200 and processor 300;The position indicator 100 includes infrared light supply and dispersion prism, described infrared
Light source is infrared ray wideband light source, and the infrared light supply includes the first infrared light supply 101 and the second infrared light supply 103, described the
One infrared light supply 101 is laid vertically, 103 horizontal layout of the second infrared light supply, one end and second of the first infrared light supply 101
One end of infrared light supply 103 intersects at a upper vertex in space, and the upper vertex is defined as origin;Described first is infrared
The side of light source 101 is parallel to be laid with the first dispersion prism 102, and the parallel beneath of second infrared light supply 103 is laid with
Any surface of second dispersion prism 104, the first dispersion prism 102 and the second dispersion prism 104 is respectively with first
Infrared light supply 101 is parallel with the second infrared light supply 103;The number of the photodetector 200 is four, the photodetector
200 are laid on four points in the same plane of positioning body surface;The photodetector 200 includes wireless passes
Defeated module 201;The processor 300 includes computer.
The wave band of first infrared light supply 101 is 800~1200nm;The wave band of second infrared light supply 103 is
1400~1800nm;The first dispersion prism 102 and the second dispersion prism 104 are in same plane;Described first
Infrared light supply 101 and the horizontal distance of the first dispersion prism 102, the second infrared light supply 103 and the second dispersion prism 104 are equal
For 0.5cm;The infrared light supply, the infrared light for sending out different-waveband;The dispersion prism, for dividing infrared light supply
Different infrared lights is dissipated into cover in space;The photodetector 200, for detecting infrared signal, and by infrared light
Signal is converted to electric signal, and electric signal is sent to processor 300 by wireless transport module 201;The processor 300, is used for
Receive electric signal, and it is carried out processing calculate place's photodetector 200 coordinate, to obtain positioning object position letter
Breath.
Embodiment 2:It is based on infrared light based on a kind of one kind of the Wavelength-encoding indoor locating system based on infrared optical dispersion
The Wavelength-encoding indoor orientation method of dispersion, includes the following steps:
Step 1:First infrared light supply 101 sends out the infrared light of vertical direction;Second infrared light supply 103 sends out the red of horizontal direction
Outer light;
Step 2:The infrared light of vertical direction is covered with space after 102 dispersion of the first dispersion prism;The infrared light of horizontal direction
It is covered with space after 104 dispersion of the second dispersion prism;
Step 3:Photodetector 200 is detected through the infrared signal of itself, and the wavelength information of infrared signal is converted
Computer is sent to by wireless transport module 201 for electric signal;
Step 4:Computer carries out Wavelength-encoding to the electric signal for carrying infrared waves long message, is determined according to coding information
The location information of position object.
The infrared light of vertical direction is sent out in the first infrared light supply 101;Second infrared light supply 103 sends out the red of horizontal direction
Before outer light, further include:The above vertex is origin, and xyz three-dimensional system of coordinates are established in located space;The infrared light of horizontal direction
By any point in space, angle of this with z-axis direction after xOz plane projections isThe infrared light of vertical direction passes through
Any point in space, it is θ with the angle of x-axis direction after xOy plane projections to define this, and any point is away from coordinate in definition space
The distance of origin is r, and the coordinate of any point is in space
The step, 3 specifically include:Each photodetector 200 detects the red of horizontal direction and vertical direction respectively
Outer light;And infrared signal is converted into electric signal, computer is sent to by wireless transport module 201.
The step 4 specifically includes:
Set the coordinate of 200 point of each photodetector as The distance of the photodetector 200 between any two is d0, d1, d2, d3, d4, d5;
Computer carries out Wavelength-encoding to the infrared signal received, obtains 200 point of photodetectorWith θ values;
According to relationship between the coordinate of 200 point of each photodetector, equation is established, r values are obtained by solving, to
To the location information of positioning object.
As a kind of embodiment, for present invention positioning object chooses cap in kind in the present embodiment, on cap, choosing
Take four points a, b, c, d, four points in a plane, as shown in figure 4, placing photodetector respectively on four points a, b, c and d
200;The infrared signal that each photodetector 200 can detect in space by itself can also select bracelet in addition to cap
Or other light and handy objects, it is moved in located space by wearing these positioning objects, position indicator 100 can be accurately positioned in real time.
Due in space there are two kinds of orientation and the infrared light light source of different-waveband, in space arbitrary of each photodetector 200
Position can all detect the infrared signal of two kinds of wavelength, and photodetector 200 can determine each light by the optical signal detected
Two angle informations of the electric explorer 200 in this space coordinates,Value and θ values;The distance between four photodetectors 200
d0,d1,d2,d3,d4,d5It can be set in advance, as known conditions, according to the distance of photodetector 200 between any two
Equation group is listed, if the coordinate of four photodetectors 200
Wherein each coordinateWhat the optical signal that value and θ values can be detected by photodetector 200 was obtained by processor 300
Given information, therefore to determine that unique coordinate just needs to solve unique r1、r2、r3And r4, by photodetector 200 two-by-two it
Between distance as known conditions, equation group can be listed, it is as follows:
In qualifications r1> 0, r2> 0, r3> 0, r4Under > 0, by mathematica softwares, above-mentioned equation can be solved
Group, experiments verify that, unique solution is obtained, therefore the position of positioning object can be determined according to coordinate value.
As shown in figure 5, being proved below by specific example, four in a plane are looked in the located space first
Particular point (a, b, c, d), known to four point coordinates:
a(1,180°,0°)、b(2,180°,0°)、
It is now assumed that known four pointsValue and θ values, then four point coordinates be:
a(r1,180°,0°)、b(r2,180°,0°)、c(r3,135°,90°)、d(r4,135°,90°)
Known the distance between point two-by-two, i.e. d0=1, d1=2,d3=1,
Conditions above is brought into the equation group after abbreviation, unique solution r can be obtained1=1, r2=2,Card
The positioning system and method for the bright present invention, which can be realized, positions space object;If bringing equation group into obtains many solutions, illustrate this
System can not achieve positioning.
The embodiment of the above, only presently preferred embodiments of the present invention, not limits the practical range of the present invention,
Therefore the equivalent change or modification that all structure, feature and principles according to described in the scope of the claims of the present invention are done, this hair should all be included in
In bright claim.
Claims (9)
1. a kind of Wavelength-encoding indoor locating system based on infrared optical dispersion, which is characterized in that including position indicator, photodetection
Device and processor;The position indicator includes infrared light supply and dispersion prism, and the infrared light supply is infrared ray wideband light source, institute
It includes the first infrared light supply and the second infrared light supply to state infrared light supply, and first infrared light supply is laid vertically, and described second is red
One end of outer light source horizontal layout, one end of the first infrared light supply and the second infrared light supply intersects at a upper vertex in space,
And the upper vertex is defined as origin;The side of first infrared light supply is parallel to be laid with the first dispersion prism, described
The parallel beneath of second infrared light supply is laid with the second dispersion prism, the first dispersion prism and the second dispersion prism
Any surface it is parallel with the first infrared light supply and the second infrared light supply respectively;The number of the photodetector is four, described
Photodetector is laid on four points in the same plane of positioning body surface;The photodetector includes nothing
Line transmission module;The processor includes computer.
2. the Wavelength-encoding indoor locating system according to claim 1 based on infrared optical dispersion, which is characterized in that described
The wave band of first infrared light supply is 800~1200nm;The wave band of second infrared light supply is 1400~1800nm.
3. the Wavelength-encoding indoor locating system according to claim 1 based on infrared optical dispersion, which is characterized in that described
First dispersion prism and the second dispersion prism are in same plane;First infrared light supply and the first dispersion trigone
The horizontal distance of mirror, the second infrared light supply and the second dispersion prism is 0.5cm.
4. the Wavelength-encoding indoor locating system according to claim 1 based on infrared optical dispersion, which is characterized in that described
Infrared light supply, the infrared light for sending out different-waveband;
The dispersion prism is covered for infrared light supply to be dispersed into different infrared lights in space.
5. the Wavelength-encoding indoor locating system according to claim 1 based on infrared optical dispersion, which is characterized in that described
Photodetector is converted to electric signal for detecting infrared signal, and by infrared signal, and electric signal is by being wirelessly transferred mould
Block is sent to processor;
The processor, for receiving electric signal, and it is carried out processing calculate place's photodetector coordinate, to obtain
Position the location information of object.
6. a kind of base based on any Wavelength-encoding indoor locating system based on infrared optical dispersion described in claim 1-5
In the Wavelength-encoding indoor orientation method of infrared optical dispersion, which is characterized in that include the following steps:
Step 1:First infrared light supply sends out the infrared light of vertical direction;Second infrared light supply sends out the infrared light of horizontal direction;
Step 2:The infrared light of vertical direction is covered with space after the first dispersion prism dispersion;The infrared light of horizontal direction is through
It is covered with space after two dispersion prism dispersions;
Step 3:Photodetector detection is converted to electricity by the infrared signal of itself, and by the wavelength information of infrared signal
Signal is sent to computer by wireless transport module;
Step 4:Computer carries out Wavelength-encoding to the electric signal for carrying infrared waves long message, is determined according to coding information
The location information of position object.
7. the Wavelength-encoding indoor orientation method according to claim 6 based on infrared optical dispersion, which is characterized in that
One infrared light supply sends out the infrared light of vertical direction;Before second infrared light supply sends out the infrared light of horizontal direction, further include:With
Upper vertex is origin, and xyz three-dimensional system of coordinates are established in located space;The infrared light of horizontal direction by any point in space,
Angle of this with z-axis direction after xOz plane projections beFor the infrared light of vertical direction by any point in space, definition should
Point is θ with the angle of x-axis direction after xOy plane projections, and distance of any point away from coordinate origin is r, space in definition space
The coordinate of interior any point is
8. the Wavelength-encoding indoor orientation method according to claim 6 based on infrared optical dispersion, which is characterized in that described
Step 3 specifically includes:Each photodetector detects the infrared light of horizontal direction and vertical direction respectively;And infrared light is believed
Number be converted to electric signal is sent to computer by wireless transport module.
9. the Wavelength-encoding indoor orientation method according to claim 6 based on infrared optical dispersion, which is characterized in that described
Step 4 specifically includes:
Set the coordinate of each photodetector point as
The distance of the photodetector between any two is d0, d1, d2, d3, d4, d5;
Computer carries out Wavelength-encoding to the infrared signal received, obtains photodetector pointWith θ values;
According to relationship between the coordinate of each photodetector point, equation is established, r values are obtained by solving, to obtain
Position the location information of object.
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张锦龙: "红外小目标图像实时压缩传输系统的研究", 《中国优秀博硕士学位论文全文数据库(硕士) 信息科技辑》 * |
Cited By (2)
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CN109709508A (en) * | 2019-01-17 | 2019-05-03 | 电子科技大学 | A kind of optics AOA localization method based on sensor node |
CN109709508B (en) * | 2019-01-17 | 2020-09-01 | 电子科技大学 | Optical AOA positioning method based on sensor nodes |
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