CN111551182B - Visible light indoor terminal positioning method and visible light positioning system - Google Patents
Visible light indoor terminal positioning method and visible light positioning system Download PDFInfo
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- CN111551182B CN111551182B CN202010513325.5A CN202010513325A CN111551182B CN 111551182 B CN111551182 B CN 111551182B CN 202010513325 A CN202010513325 A CN 202010513325A CN 111551182 B CN111551182 B CN 111551182B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
- G01C21/206—Instruments for performing navigational calculations specially adapted for indoor navigation
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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
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Abstract
The invention discloses a visible light indoor terminal positioning method and a visible light positioning system, wherein the visible light indoor terminal does not need to calculate a positioning detection light signal, and the calculation link of the positioning detection light signal is transferred to a visible light communication positioning lamp for calculation, so that the structural complexity of the visible light indoor terminal is reduced, the power consumption and the cost of the visible light indoor terminal are reduced, and because the visible light communication positioning lamp has fewer volume, shape and function limiting factors, a processor with stronger functions can be integrated on the visible light communication positioning lamp, and the processor with stronger functions is used for carrying out complicated calculation to obtain the position information of the visible light indoor terminal with high precision.
Description
Technical Field
The invention relates to the technical field of communication positioning, in particular to a visible light indoor terminal positioning method and a visible light positioning system.
Background
As an indispensable part of life, people are increasingly demanding positioning location services not only outdoors but also indoors. The demand for indoor positioning location services is increasing day by day, which promotes the rapid development of indoor positioning technology.
At present, the visible light communication positioning technology is mainly adopted to provide indoor positioning position service. Specifically, the visible light communication positioning technology is mainly characterized in that a visible light communication lamp sends a signal with a special design, and after the visible light indoor terminal receives the signal, a positioning subsystem arranged inside the indoor visible light indoor terminal estimates a direction angle or judges the intensity, so that the position of the visible light indoor terminal is determined.
In the prior art, the positioning subsystem arranged inside the visible light indoor terminal not only increases the structural complexity of the visible light indoor terminal, which leads to the increase of the cost and power consumption of the visible light indoor terminal, but also limits the positioning of the visible light indoor terminal to the processing capacity of the positioning subsystem, which leads to the problem of low positioning accuracy of the visible light indoor terminal.
Disclosure of Invention
In view of this, the invention discloses a visible light indoor terminal positioning method and a visible light positioning system, which achieve the purpose of obtaining high-precision position information of a visible light indoor terminal.
In order to achieve the purpose, the technical scheme is as follows:
the invention discloses a first aspect of a visible light indoor terminal positioning method, which is applied to a visible light positioning system, wherein the visible light positioning system comprises a visible light communication positioning lamp and a visible light indoor terminal, and the method comprises the following steps:
the visible light communication positioning lamp transmits a token signal and a positioning detection light signal to the visible light indoor terminal, wherein the token signal comprises a terminal identifier of the visible light indoor terminal to be positioned currently;
receiving the token signal and the visible light indoor terminal of the positioning detection light signal, and matching the terminal identification of the terminal with the terminal identification in the token signal;
if the matching is successful, the visible light indoor terminal starts a controllable reflecting surface to reflect the positioning detection light signal;
and the visible light communication positioning lamp executes positioning operation based on the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
Preferably, the visible light indoor terminal is composed of an optical receiver, a controllable reflection system, a control circuit and a processor, the controllable reflection system at least includes a controllable light transmission layer, the visible light indoor terminal receiving the token signal and the positioning detection optical signal matches its own terminal identifier with the terminal identifier in the token signal, and the method includes:
the optical receiver sends the received token signal to the processor;
the processor matches the terminal identification of the visible light indoor terminal based on the terminal identification in the token signal;
if the matching is successful, the process of starting a controllable reflecting surface by the visible light indoor terminal and reflecting the positioning detection light signal comprises the following steps:
the processor determines a control potential corresponding to the light-on state based on the successful matching result, and sends the control potential to the control circuit;
the control circuit enables the controllable light-transmitting layer to be in a light-transmitting state based on the control potential;
and the controllable light-transmitting layer reflects the received positioning detection light signal.
Preferably, the visible light communication positioning lamp at least includes a light receiving device and a communication positioning processor, and the visible light communication positioning lamp performs a positioning operation based on the reflected positioning probe light signal to obtain the position information of the visible light indoor terminal, including:
the light receiving device receives the reflected positioning detection light signal;
and the communication positioning processor calculates the direction angle and the light intensity of the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
Preferably, after the visible light indoor terminal receiving the token signal and the positioning probe light signal matches its own terminal identifier with the terminal identifier in the token signal, the method further includes:
and if the matching fails, the visible light indoor terminal closes the controllable reflecting surface.
Preferably, after the visible light communication positioning lamp performs a positioning operation based on the reflected positioning probe light signal to obtain the position information of the visible light indoor terminal, the method further includes:
the visible light communication positioning lamp broadcasts the position information of the visible light indoor terminal;
or the visible light communication positioning lamp uploads the position information of the visible light indoor terminal to a server through a network trunk line.
Preferably, if the visible light positioning system includes N visible light indoor terminals, where a value of N is an integer greater than 1, after the visible light communication positioning lamp performs a positioning operation based on the reflected positioning probe light signal to obtain position information of the visible light indoor terminal, the method further includes:
updating the number of the currently positioned visible light indoor terminals, and judging whether the number of the visible light indoor terminals is N;
if so, ending the positioning by the visible light communication positioning lamp;
if not, the visible light communication positioning lamp returns to the step of transmitting the token signal and positioning the detection light signal.
Preferably, the method further comprises the following steps:
and if the visible light indoor terminal does not receive the positioning detection light signal, generating unknown information of the terminal position.
The invention discloses a visible light positioning system in a second aspect, the system comprises a visible light communication positioning lamp and a visible light indoor terminal, the system comprises:
the visible light communication positioning lamp is used for transmitting a token signal and a positioning detection light signal to the visible light indoor terminal, wherein the token signal comprises a terminal identifier of the visible light indoor terminal to be positioned currently;
the visible light indoor terminal receives the token signal and the positioning detection light signal and is used for matching the terminal identification of the terminal with the terminal identification in the token signal; if the matching is successful, the visible light indoor terminal starts a controllable reflecting surface to reflect the positioning detection light signal;
the visible light communication positioning lamp is further used for executing positioning operation based on the reflected positioning detection light signal to obtain position information of the visible light indoor terminal.
Preferably, the visible light indoor terminal is composed of a light receiver, a controllable reflection system, a control circuit and a processor, wherein the controllable reflection system at least comprises a controllable light-transmitting layer;
the optical receiver is used for sending the received token signal to the processor;
the processor is used for matching the terminal identification in the token signal with the terminal identification of the visible light indoor terminal; determining a control potential corresponding to the light-passing state based on the successful matching result, and sending the control potential to the control circuit;
the control circuit is used for enabling the controllable light-transmitting layer to be in a light-transmitting state based on the control potential;
and the controllable light transmitting layer is used for reflecting the received positioning detection light signal.
Preferably, the visible light communication positioning lamp at least comprises a light receiving device and a communication positioning processor;
the light receiving device is used for receiving the reflected positioning detection light signal;
and the communication positioning processor is used for calculating the direction angle and the light intensity of the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
According to the technical scheme, the visible light indoor terminal does not need to perform calculation of the positioning detection light signal, the calculation link of the positioning detection light signal is transferred to the visible light communication positioning lamp, the structural complexity of the visible light indoor terminal is reduced, the power consumption and the cost of the visible light indoor terminal are reduced, and the visible light indoor terminal can be integrated with a processor with stronger functions on the visible light communication positioning lamp due to the fact that the visible light communication positioning lamp is less in size, shape and function limiting factors, and the processor with stronger functions is used for performing complex calculation to obtain high-precision position information of the visible light indoor terminal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of a visible light positioning system according to an embodiment of the present invention;
FIG. 2 is a block diagram of a visible light communication positioning light according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of a visible light indoor terminal disclosed in an embodiment of the present invention;
fig. 4 is a schematic flow chart of a visible light indoor terminal positioning method disclosed in the embodiment of the present invention;
fig. 5 is a structural diagram of a visible light communication positioning lamp and a plurality of visible light indoor terminals if the visible light positioning system includes a plurality of visible light indoor terminals, which is disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As can be seen from the background art, in the prior art, the positioning subsystem disposed inside the visible light indoor terminal not only increases the structural complexity of the visible light indoor terminal, resulting in an increase in the cost and power consumption of the visible light indoor terminal, but also limits the positioning of the visible light indoor terminal to the processing capability of the positioning subsystem, resulting in a low positioning accuracy of the visible light indoor terminal.
In order to solve the problem, the invention discloses a visible light indoor terminal positioning method and a visible light positioning system, the visible light indoor terminal does not need to calculate the positioning detection light signal, the calculation link of the positioning detection light signal is transferred to a visible light communication positioning lamp for calculation, the structural complexity of the visible light indoor terminal is reduced, the power consumption and the cost of the visible light indoor terminal are reduced, and because the limiting factors of the size, the shape and the function of the visible light communication positioning lamp are less, a processor with stronger functions can be integrated on the visible light communication positioning lamp, and the processor with stronger functions is used for carrying out complicated calculation to obtain the position information of the visible light indoor terminal with high precision. The specific implementation is specifically illustrated by the following examples.
As shown in fig. 1, an architecture diagram of a visible light positioning system disclosed in the embodiment of the present invention includes a visible light communication positioning lamp 101 and a visible light indoor terminal 102.
The visible light communication positioning lamp 101 is used for transmitting a token signal and a positioning detection light signal to the visible light indoor terminal 102.
Wherein the token signal comprises the terminal identification of the visible light indoor terminal 102 currently to be located.
One instruction used by the token signal to coordinate the transmissions of multiple terminals is a data frame containing the identity of the terminal.
The positioning probe light signal is used to position the visible light indoor terminal 102.
The visible light indoor terminal 102 for receiving the token signal and the positioning detection light signal is used for matching the terminal identifier of the terminal with the terminal identifier in the token signal, and if the matching is successful, the controllable reflecting surface is opened to reflect the positioning detection light signal.
The terminal identifier in the token signal is successfully matched with the terminal identifier of the visible light indoor terminal 102 to obtain a successful matching result, the processor of the visible light indoor terminal 102 determines a control potential corresponding to a light-transmitting state based on the successful matching result, and sends the control potential to the control circuit of the visible light indoor terminal 102, and the control circuit of the visible light indoor terminal 102 enables the controllable light-transmitting layer to be in the light-transmitting state based on the control potential, that is, the visible light indoor terminal 102 starts the controllable reflecting surface.
Optionally, the visible light indoor terminal 102 that receives the token signal and the positioning probe light signal is configured to match the terminal identifier of the terminal with the terminal identifier in the token signal, and if the matching fails, close the controllable reflective surface.
The terminal identifier in the token signal and the terminal identifier of the visible light indoor terminal 102 are failed to match, a result of the failure in matching is obtained, the processor of the visible light indoor terminal 102 determines a control potential corresponding to the shading state based on the result of the failure in matching, the control potential is sent to the control circuit of the visible light indoor terminal 102, the control circuit of the visible light indoor terminal 102 enables the controllable light-transmitting layer to be in the shading state based on the control potential, and the controllable reflecting surface of the visible light indoor terminal 102 can be closed.
The visible light communication positioning lamp 101 is further configured to perform a positioning operation based on the reflected positioning probe light signal, so as to obtain position information of the visible light indoor terminal 102.
Further, the visible light communication positioning lamp 101 includes at least a light receiving device and a communication positioning processor.
And the light receiving device is used for receiving the reflected positioning detection light signal.
And the communication positioning processor is used for calculating the direction angle and the light intensity of the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal 102.
Further, the visible light indoor terminal 102 is composed of a light receiver, a controllable reflection system, a control circuit and a processor, wherein the controllable reflection system at least comprises a controllable light-transmitting layer.
And the optical receiver is used for sending the received token signal to the processor.
A processor for matching the terminal identifier in the token signal with the terminal identifier of the visible light indoor terminal 102; and determining a control potential corresponding to the light-on state based on the successful matching result, and sending the control potential to the control circuit.
And the control circuit is used for enabling the controllable light-transmitting layer to be in a light-transmitting state based on the control potential.
And the controllable light transmitting layer is used for reflecting the received positioning detection light signal.
Optionally, the visible light communication positioning lamp 101 is further used for broadcasting the position information of the visible light indoor terminal 102.
Or the visible light communication positioning lamp 101 is also used for uploading the position information of the visible light indoor terminal 102 to the server through the network trunk line.
The visible light communication positioning lamp 101 broadcasts the position information of the visible light indoor terminal 102, so that other visible light indoor terminals receive the position information and perform other processing and application, such as displaying on a map.
The visible light communication positioning lamp 101 uploads the position information of the visible light indoor terminal 102 to the server through a network trunk line, and the position information is used for displaying the positions of all visible light indoor terminals on the server through software, so that other service requirements based on the positions of the visible light indoor terminals are provided.
Optionally, if the visible light positioning system includes N visible light indoor terminals 102, where a value of N is an integer greater than 1, the visible light communication positioning lamp 101 is specifically configured to update the number of currently positioned visible light indoor terminals 102, and determine whether the number of visible light indoor terminals 102 is N, if so, the visible light communication positioning lamp 101 ends positioning, and if not, the visible light communication positioning lamp 101 returns to execute the step of transmitting the token signal and positioning the probe light signal.
Optionally, if the visible light indoor terminal 102 does not receive the positioning probe light signal, unknown information of the terminal position is generated.
The embodiment of the invention discloses a visible light positioning system, a visible light indoor terminal does not need to calculate a positioning detection light signal, the calculation link of the positioning detection light signal is transferred to a visible light communication positioning lamp for calculation, the structural complexity of the visible light indoor terminal is reduced, the power consumption and the cost of the visible light indoor terminal are reduced, and a processor with stronger functions can be integrated on the visible light communication positioning lamp due to fewer limiting factors of the volume, the shape and the functions on the visible light communication positioning lamp, and the processor with stronger functions is used for carrying out complicated calculation to obtain the position information of the visible light indoor terminal with high precision.
Based on the above visible light positioning system disclosed in the embodiment of the present invention, as shown in fig. 2 specifically, the visible light positioning system is a structure of the above visible light communication positioning lamp 101 disclosed in the embodiment of the present invention, specifically, the visible light communication positioning lamp 101 includes a lamp cover 201, a light receiving device 202, an LED lamp bead 203, and a lamp holder 204, and the lamp holder 204 includes a wired interface, a communication positioning processor 205, and an LED driver 206.
And a light receiving device 202 for receiving the positioning detection light signal reflected by the visible light indoor terminal 102.
The number of the light receiving devices 202 may be multiple, and since the light receiving devices 202 have directivity, the multiple light receiving devices with different orientations form an incoming light direction sensing array.
The light direction sensing array can also be replaced by a light imaging device, and the position of the terminal in the visible light chamber is identified by using an imaging mode. The present invention is not particularly limited to the determination of the incoming light direction sensing array.
And the LED lamp beads 203 are used for emitting light.
Wherein, LED lamp pearl 203 can be a plurality of.
The number of the LED beads 203, the arrangement of the light receiving devices 202, and the shape of the lampshade 201 can be changed. The positioning effect is different for different shapes of the lamp housing and the arrangement of the light receiving devices 202.
The number of the LED lamp beads 203, the arrangement of the light receiving devices 202, and the shape of the lampshade are not particularly limited in the present invention.
And the wired interface is used for connecting the visible light communication positioning lamp 101 to a backbone network through a network trunk.
And the communication positioning processor 205 is configured to calculate a direction angle and a light intensity of the positioning probe light signal reflected by the visible light indoor terminal 102, so as to obtain the position information of the visible light indoor terminal 102.
And the LED driver 206 is used for driving the LED lamp beads 203 to emit light.
Based on the visible light positioning system disclosed in the embodiment of the present invention, as shown in fig. 3 specifically, the visible light indoor terminal 102 disclosed in the embodiment of the present invention is a structure of the visible light indoor terminal 102, specifically, the visible light indoor terminal 102 includes a light receiver 301, a controllable reflection system 302, a processor 303 and a control circuit 304, and the controllable reflection system 302 includes a controllable light-transmitting layer, a scattering layer and a light-reflecting layer.
An optical receiver 301 for sending the received token signal to a processor 303.
And the controllable reflection system 302 is used for carrying out visible light positioning and communication by reflecting light signals emitted by an external light source.
And the controllable light-transmitting layer is used for selecting a light-transmitting state or a light-shielding state based on the type of the control potential.
And the scattering layer is used for scattering the positioning detection optical signal, so that the optical angle of the positioning detection optical signal is increased.
And the reflecting layer is used for reflecting the positioning detection light signals emitted by the visible light communication positioning lamp 101.
The reflective layer is arranged under the scattering layer, the scattering layer is arranged on the controllable light-transmitting layer, and the reflective layer and the scattering layer are combined to enable the incident positioning detection light signal to generate omnidirectional diffuse reflection, so that the visible light communication positioning lamp 101 is ensured to receive the positioning detection light signal reflected by the visible light indoor terminal 102.
A processor 303 for receiving a token signal emitted by the visible light communication positioning light 101; matching is carried out on the basis of the terminal identification in the token signal and the terminal identification of the visible light indoor terminal 102, and if the terminal identification in the token signal is successfully matched with the terminal identification of the visible light indoor terminal 102, a successful matching result is obtained; if the terminal identification in the token signal fails to be matched with the terminal identification of the visible light indoor terminal 102, obtaining a matching failure result; determining a control potential corresponding to the light-on state based on the result of successful matching, and sending the potential corresponding to the light-on state to the control circuit 304; based on the matching failure result, the control potential corresponding to the light shielding state is determined, and the control position corresponding to the light shielding state is sent to the control circuit 304.
A control circuit 304, configured to make the controllable light-transmitting layer in a light-transmitting state based on a control potential corresponding to the light-transmitting state sent by the processor 303; the controllable light-transmitting layer is set in a light-shielding state based on a control potential corresponding to the light-shielding state transmitted from the processor 303.
Based on the visible light positioning system disclosed in the embodiment of the present invention, as shown in fig. 4, a schematic flow chart of a visible light indoor terminal positioning method disclosed in the embodiment of the present invention is shown, the visible light indoor terminal positioning method is suitable for the visible light positioning system disclosed in the embodiment of the present invention, and the visible light indoor terminal positioning method mainly includes the following steps:
s401: the visible light communication positioning lamp transmits a token signal and a positioning detection light signal to the visible light indoor terminal.
And the token signal comprises a terminal identification of the visible light indoor terminal to be positioned currently.
One instruction used by the token signal to coordinate the transmissions of multiple terminals is a data frame containing the identity of the terminal.
The positioning detection light signal is used for positioning the position of the terminal in the visible light room.
S402: and receiving the token signal and positioning the visible light indoor terminal of the detection light signal, and matching the terminal identification of the terminal with the terminal identification in the token signal. If the matching is successful, S403 is executed, and if the matching is failed, S404 is executed.
S403: and the controllable reflecting surface is opened at the visible light indoor terminal to reflect and position the detection light signal.
In the process of specifically implementing S203, the visible light indoor terminal successfully matches the terminal identifier in the token signal with the terminal identifier of the visible light indoor terminal to obtain a successful matching result, the processor of the visible light indoor terminal determines a control potential corresponding to the light-on state based on the successful matching result, and sends the control potential to the control circuit of the visible light indoor terminal, and the control circuit of the visible light indoor terminal makes the controllable light-transmitting layer in the light-on state based on the control potential, that is, the visible light indoor terminal opens the controllable reflecting surface.
S404: the visible light indoor terminal closes the controllable reflecting surface.
In the specific implementation process of S404, the visible light indoor terminal fails to match the terminal identifier in the token signal with the terminal identifier of the visible light indoor terminal, and obtains a result of the matching failure, the processor of the visible light indoor terminal determines a control potential corresponding to the shading state based on the result of the matching failure, and sends the control potential to the control circuit of the visible light indoor terminal, and the control circuit of the visible light indoor terminal makes the controllable light-transmitting layer in the shading state based on the control potential, that is, the visible light indoor terminal closes the controllable reflecting surface.
S405: the visible light communication positioning lamp executes positioning operation based on the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
In the process of implementing S405, the light receiving device of the visible light communication positioning lamp receives the reflected positioning detection light signal, and the communication positioning processor of the visible light communication positioning lamp calculates the direction angle and the light intensity of the reflected positioning detection light signal, so as to obtain the position information of the visible light indoor terminal.
The positioning sensing and calculation are realized on the visible light communication positioning lamp, and the visible light indoor terminal does not need to be configured with a light angle sensing array and does not need to be subjected to any positioning sensing and calculation, so that the structural complexity of the visible light indoor terminal is simplified, and the power consumption and the cost of the visible light indoor terminal are reduced.
Because the visible light communication positioning lamp is provided with fewer limiting factors of volume, shape and power consumption, a larger-scale incoming light direction sensing array and a processor with stronger function can be conveniently integrated, and the sensed positioning detection light signal can be sent to a far-end server for complex calculation, so that higher positioning accuracy is obtained.
The embodiment of the invention discloses a visible light indoor terminal positioning method, a visible light indoor terminal does not need to perform calculation of a positioning detection light signal, the calculation link of the positioning detection light signal is transferred to a visible light communication positioning lamp for performing, the structural complexity of the visible light indoor terminal is reduced, the power consumption and the cost of the visible light indoor terminal are reduced, and a processor with stronger functions can be integrated on the visible light communication positioning lamp due to fewer volume, shape and function limiting factors on the visible light communication positioning lamp, and the processor with stronger functions is used for performing complicated calculation to obtain high-precision position information of the visible light indoor terminal.
In combination with the above fig. 4, a schematic flow chart of a method for positioning a visible light indoor terminal is disclosed, where the visible light indoor terminal includes a light receiver, a controllable reflection system, a processor and a control circuit, and the controllable reflection system includes a controllable light transmission layer, a scattering layer and a light reflection layer. The process of S402 is specifically executed, as shown in A1-A6:
a1: the optical receiver sends the received token signal to the processor.
A2: the processor matches the terminal identification of the visible light indoor terminal based on the terminal identification in the token signal, obtains a successful matching result if the terminal identification in the token signal is successfully matched with the terminal identification of the visible light indoor terminal, and obtains a failed matching result if the terminal identification in the token signal is unsuccessfully matched with the terminal identification of the visible light indoor terminal.
A3: and the processor determines a control potential corresponding to the light-on state based on the successful matching result and sends the control potential to the control circuit.
A4: the control circuit enables the controllable light-transmitting layer to be in a light-transmitting state based on the control potential, and the controllable light-transmitting layer reflects the received positioning detection light signal.
The controllable light-transmitting layer is in a light-transmitting state and refers to a controllable reflecting surface opened by a terminal in the visible light chamber.
A5: the processor determines a control potential corresponding to the light shielding state based on a result of the matching failure, and transmits the control potential to the control circuit.
A6: the control circuit enables the controllable light-transmitting layer to be in a light-shielding state based on the control potential.
The controllable light-transmitting layer is in a light-shielding state, and the controllable light-transmitting layer is a controllable reflecting surface closed by a visible light indoor terminal.
In the embodiment of the invention, the optical receiver sends the received token signal to the processor, and the processor matches the terminal identification of the visible light indoor terminal based on the terminal identification in the token signal. If the matching is successful, the controllable reflecting surface is opened by the visible light indoor terminal, the positioning detection light signal is reflected, if the matching is failed, the controllable reflecting surface is closed by the visible light indoor terminal, the visible light indoor terminal is based on the terminal identifications in the different token signals, the processor determines the control potential corresponding to the light-on state based on the matching success result, and sends the control potential to the control circuit, the control circuit enables the controllable light-transmitting layer to be in the light-on state based on the control potential, so that the controllable light-transmitting layer reflects the received positioning detection light signal, and the purpose of executing corresponding operation control on the controllable reflecting surface is achieved.
In an application scene, after a visible light communication positioning lamp executes positioning operation based on a reflected positioning detection light signal to obtain position information of a visible light indoor terminal, the visible light communication positioning lamp broadcasts the position information of the visible light indoor terminal; or the visible light communication positioning lamp uploads the position information of the visible light indoor terminal to the server through a network trunk line.
The visible light communication positioning lamp broadcasts the position information of the visible light indoor terminal, so that other visible light indoor terminals receive the position information and then perform other processing and application, such as display on a map.
The visible light communication positioning lamp uploads the position information of the visible light indoor terminal to the server through a network trunk line, and the position information is used for displaying the positions of all visible light indoor terminals on the server through software, so that other service requirements based on the positions of the visible light indoor terminals are provided.
And broadcasting the position information of the visible light indoor terminal by the visible light communication positioning lamp, or uploading the position information of the visible light indoor terminal to the server by the visible light communication positioning lamp through a network trunk, and then continuing to perform positioning of the next visible light indoor terminal until all visible light indoor terminals are positioned.
In the embodiment of the invention, the visible light communication positioning lamp broadcasts the position information of the visible light indoor terminal, so that other visible light indoor terminals perform other processing and application after receiving the position information, and the visible light communication positioning lamp uploads the position information of the visible light indoor terminal to the server through a network trunk line, so that the positions of all visible light indoor terminals are displayed on the server through software, and other service requirements based on the positions of the visible light indoor terminals are provided.
In another application scenario, if the visible light positioning system comprises N visible light indoor terminals, the value of N is an integer greater than 1, after the positioning detection light signal reflected by the visible light communication positioning lamp is executed to obtain the position information of the visible light indoor terminal, the number of the currently positioned visible light indoor terminals is updated, whether the number of the visible light indoor terminals is N or not is judged, if yes, the visible light communication positioning lamp finishes positioning, and if not, the visible light communication positioning lamp returns to the step of executing the steps of transmitting the token signal and positioning the detection light signal.
Specifically, if the visible light positioning system includes N visible light indoor terminals, and the value of N is greater than 1, the visible light communication positioning lamp and the visible light indoor terminal execute the process, as shown in fig. 5.
In fig. 5, the emitted light is a positioning detection light signal emitted by a visible light communication positioning lamp, and the reflected light is a positioning detection light signal emitted by a visible light indoor terminal reflection visible light communication positioning lamp.
The visible light communication positioning lamp and the plurality of visible light indoor terminals are executed as B1-B11:
b1: in the indoor space, the visible light positioning system comprises N visible light indoor terminals, and the value of N is 3. The visible light communication positioning lamp transmits a token signal and a positioning detection light signal to the visible light indoor terminal, wherein the token signal comprises a terminal identifier 1 of the visible light indoor terminal to be positioned currently.
B2: the visible light indoor terminal 1 for receiving the token signal and the positioning detection light signal matches the terminal identifier of the terminal 1 with the terminal identifier 1 in the token signal, the visible light indoor terminal 1 starts the controllable reflecting surface, reflects the positioning detection light signal, and other visible light indoor terminals close the controllable reflecting surface.
B3: the visible light communication positioning lamp executes positioning operation based on the positioning detection light signal reflected by the visible light indoor terminal 1 to obtain the position information of the visible light indoor terminal 1.
B4: and determining and updating the number of the currently positioned visible light indoor terminals to be 1.
B5: at the moment, the number of the visible light indoor terminals is not 3, the visible light communication positioning lamp continuously transmits a token signal and a positioning detection light signal to the next visible light indoor terminal, wherein the token signal comprises a terminal identifier 2 of the visible light indoor terminal to be positioned at present.
B6: the visible light indoor terminal 2 for receiving the token signal and the positioning detection light signal matches the terminal identification of the terminal 2 with the terminal identification in the token signal, the visible light indoor terminal 2 opens the controllable reflecting surface, reflects the positioning detection light signal, and closes the controllable reflecting surface by other visible light indoor terminals.
B7: the visible light communication positioning lamp executes positioning operation based on the positioning detection light signal reflected by the visible light indoor terminal 2 to obtain the position information of the visible light indoor terminal 2.
B8: and determining that the number of the currently positioned visible light indoor terminals is 2, wherein the number of the visible light indoor terminals is not 3, the visible light communication positioning lamp continuously transmits a token signal and a positioning detection light signal to the next visible light indoor terminal, and the token signal comprises a terminal identifier 3 of the currently positioned visible light indoor terminal.
B9: and the visible light indoor terminal 3 for receiving the token signal and the positioning detection light signal matches the terminal identifier of the terminal with the terminal identifier 3 in the token signal, and the visible light indoor terminal 3 opens the controllable reflecting surface to reflect the positioning detection light signal after successful matching.
B10: the visible light communication positioning lamp executes positioning operation based on the positioning detection light signal reflected by the visible light indoor terminal 3 to obtain the position information of the visible light indoor terminal 3.
B11: and determining and updating that the number of the currently positioned visible light indoor terminals is 3, wherein the number of the visible light indoor terminals is 3 at the moment, namely in the indoor space, the number of the visible light indoor terminals is completely positioned, and the positioning of the visible light communication positioning lamp is finished.
In the embodiment of the invention, if the visible light positioning system comprises N visible light indoor terminals, the value of N is an integer larger than 1, the number of the currently positioned visible light indoor terminals is updated after the positioning detection light signals reflected by the visible light communication positioning lamps are executed to obtain the position information of the visible light indoor terminals, whether the number of the visible light indoor terminals is N or not is judged, if yes, the visible light communication positioning lamps finish positioning, and if not, the visible light communication positioning lamps return to the step of executing token signal transmission and the positioning detection light signals, so that the purpose of completely positioning all the visible light indoor terminals in the indoor space is realized.
In another application scenario, if the visible light indoor terminal does not receive the positioning detection light signal, unknown information of the terminal position is generated.
The situation that the visible light indoor terminal does not receive the positioning detection light signal is as follows:
and when the distance between the visible light indoor terminal and the visible light communication positioning lamp is not within the preset range, generating unknown information of the terminal position.
The preset range may be a range with a diameter of 10 meters, or a range with a diameter of 20 meters, and the specific setting of the preset range is not specifically limited in the present invention.
The visible light communication positioning lamp broadcasts the unknown information of the terminal position to other visible light indoor terminals, so that the other visible light indoor terminals obtain the information that the visible light indoor terminals do not receive the positioning detection light signals.
The visible light communication positioning lamp uploads the unknown information of the terminal position to the server, so that the server obtains the information that the visible light indoor terminal does not receive the positioning detection light signal.
For the convenience of understanding the process of generating the unknown information of the terminal position without receiving the positioning detection light signal by the visible light indoor terminal, the following description is given by way of example:
the visible light communication positioning lamp transmits a token signal and a positioning detection light signal to the visible light indoor terminal, the preset range is that the visible light communication positioning lamp is used as the center, the diameter is 20 meters, the distance from the visible light indoor terminal to the visible light communication positioning lamp at the moment is 40 meters, the distance from the visible light indoor terminal to the visible light communication positioning lamp is not within the preset range, the visible light indoor terminal does not receive the positioning detection light signal transmitted by the visible light communication positioning lamp, and the visible light indoor terminal generates terminal position unknown information.
In the embodiment of the invention, if the visible light indoor terminal does not receive the positioning detection light signal, the unknown terminal position information is generated and is broadcast to other visible light indoor terminals, so that the other visible light indoor terminals know that the visible light indoor terminal does not receive the positioning detection light signal, or the unknown terminal position information is uploaded to the server, and the server knows that the visible light indoor terminal does not receive the positioning detection light signal.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The steps in the method of each embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The device and the modules and sub-modules in the terminal in the embodiments of the present invention can be combined, divided and deleted according to actual needs.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A visible light indoor terminal positioning method is applied to a visible light positioning system, the visible light positioning system comprises a visible light communication positioning lamp and a visible light indoor terminal, and the method comprises the following steps:
the visible light communication positioning lamp transmits a token signal and a positioning detection light signal to the visible light indoor terminal, wherein the token signal comprises a terminal identifier of the visible light indoor terminal to be positioned currently;
receiving the token signal and the visible light indoor terminal of the positioning detection light signal, and matching the terminal identification of the terminal with the terminal identification in the token signal;
if the matching is successful, the visible light indoor terminal starts a controllable reflecting surface to reflect the positioning detection light signal;
and the visible light communication positioning lamp executes positioning operation based on the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
2. The method of claim 1, wherein the visible light indoor terminal is composed of an optical receiver, a controllable reflective system, a control circuit and a processor, the controllable reflective system at least comprises a controllable light-transmitting layer, and the visible light indoor terminal receiving the token signal and the positioning detection light signal matches its own terminal identification with the terminal identification in the token signal, and comprises:
the optical receiver sends the received token signal to the processor;
the processor matches the terminal identification of the visible light indoor terminal based on the terminal identification in the token signal;
if the matching is successful, the process of starting a controllable reflecting surface by the visible light indoor terminal and reflecting the positioning detection light signal comprises the following steps:
the processor determines a control potential corresponding to the light-on state based on the successful matching result, and sends the control potential to the control circuit;
the control circuit enables the controllable light-transmitting layer to be in a light-transmitting state based on the control potential;
and the controllable light-transmitting layer reflects the received positioning detection light signal.
3. The method of claim 1, wherein the positioning light for visible light communication comprises at least a light receiving device and a communication positioning processor, and the positioning light for visible light communication performs a positioning operation based on the reflected positioning probe light signal to obtain the position information of the visible light indoor terminal, comprising:
the light receiving device receives the reflected positioning detection light signal;
and the communication positioning processor calculates the direction angle and the light intensity of the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
4. The method according to claim 1, wherein after the visible light indoor terminal receiving the token signal and the positioning probe light signal matches its own terminal identification with the terminal identification in the token signal, the method further comprises:
and if the matching fails, the visible light indoor terminal closes the controllable reflecting surface.
5. The method according to claim 1, wherein after the positioning operation is performed by the visible light communication positioning lamp based on the reflected positioning probe light signal, obtaining the position information of the visible light indoor terminal, the method further comprises:
the visible light communication positioning lamp broadcasts the position information of the visible light indoor terminal;
or the visible light communication positioning lamp uploads the position information of the visible light indoor terminal to a server through a network trunk line.
6. The method according to claim 1, wherein if the visible light positioning system includes N visible light indoor terminals, where N is an integer greater than 1, after the visible light communication positioning lamp performs positioning operation based on the reflected positioning probe light signal to obtain the position information of the visible light indoor terminal, the method further includes:
updating the number of the currently positioned visible light indoor terminals, and judging whether the number of the visible light indoor terminals is N;
if so, ending the positioning by the visible light communication positioning lamp;
if not, the visible light communication positioning lamp returns to the step of transmitting the token signal and positioning the detection light signal.
7. The method of claim 1, further comprising:
and if the visible light indoor terminal does not receive the positioning detection light signal, generating unknown information of the terminal position.
8. A visible light positioning system, the system comprising a visible light communication positioning light and a visible light indoor terminal, the system comprising:
the visible light communication positioning lamp is used for transmitting a token signal and a positioning detection light signal to the visible light indoor terminal, wherein the token signal comprises a terminal identifier of the visible light indoor terminal to be positioned currently;
the visible light indoor terminal receives the token signal and the positioning detection light signal and is used for matching the terminal identification of the terminal with the terminal identification in the token signal; if the matching is successful, the visible light indoor terminal starts a controllable reflecting surface to reflect the positioning detection light signal;
the visible light communication positioning lamp is further used for executing positioning operation based on the reflected positioning detection light signal to obtain position information of the visible light indoor terminal.
9. The system of claim 8, wherein the visible light indoor terminal is comprised of an optical receiver, a controllable reflective system, a control circuit, and a processor, the controllable reflective system including at least a controllable light transmissive layer;
the optical receiver is used for sending the received token signal to the processor;
the processor is used for matching the terminal identification in the token signal with the terminal identification of the visible light indoor terminal; determining a control potential corresponding to the light-passing state based on the successful matching result, and sending the control potential to the control circuit;
the control circuit is used for enabling the controllable light-transmitting layer to be in a light-transmitting state based on the control potential;
and the controllable light transmitting layer is used for reflecting the received positioning detection light signal.
10. The system of claim 8, wherein the visible light communication position light comprises at least a light receiving device and a communication position processor;
the light receiving device is used for receiving the reflected positioning detection light signal;
and the communication positioning processor is used for calculating the direction angle and the light intensity of the reflected positioning detection light signal to obtain the position information of the visible light indoor terminal.
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| CN116608858B (en) * | 2023-05-15 | 2024-09-06 | 广东旭宇光电有限公司 | Indoor visible light real-time positioning method, device and equipment based on health illumination |
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