CN205945753U - A transmitter for optical locating - Google Patents
A transmitter for optical locating Download PDFInfo
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- CN205945753U CN205945753U CN201620871988.3U CN201620871988U CN205945753U CN 205945753 U CN205945753 U CN 205945753U CN 201620871988 U CN201620871988 U CN 201620871988U CN 205945753 U CN205945753 U CN 205945753U
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Abstract
The utility model relates to a transmitter for optical locating, this transmitter includes framing signal generating device, drive circuit and transmitting illuminant, framing signal generating device produces general location transmission signal, and location transmission signal includes low transmission rate's first kind signal and high transmission rate's second class signal, and wherein, second class signal formation low rate envelope, low rate envelope are designed as first kind signal for first kind signal and second class signal in the location transmission signal can be detected by first kind receiver and second class receiver respectively simultaneously, the location transmission signal driver transmission luminous that drive circuit produced based on framing signal generating device. The utility model discloses an integration of the location transmission format of the signal that the first kind and second class receiver required has been simplified the transmission signal design that is used for optical locating, and has been had the universality, is suitable for the optical locating receiver that adopts different grade type photosensitive element simultaneously, has reduced optical locating transmitter cost.
Description
Technical field
This utility model is related to light projection technology, relates more specifically to a kind of transmitter for light projection.
Background technology
With the continuous development of technology of Internet of things, the demand rapid growth of hi-Fix service.In heavy construction such as
In the venue of the interior such as airport, station, shopping center, gps signal is seriously shielded, existing Wi-Fi, bluetooth, ultra broadband etc.
Indoor positioning technologies adopt wireless radio-frequency mostly, indoors in complex environment, are disturbed by multipath effect, position error is relatively
Greatly.Because light has straightline propagation and by the multipath effect less characteristic of interference, often there is higher positioning accuracy.In recent years
Come, the cost with the LED for illumination constantly reduces, and is just progressively becoming main lighting source, because LED has one
Fixed modulation bandwidth, therefore can modulate framing signal on illuminating LED lamp, by the use of LED as visible ray alignment system
Transmitting light source is it is achieved that the light of framing signal is launched.
In receiving terminal, opto-electronic conversion is carried out by photo-sensitive cell, obtain framing signal, reception can be solved after resolving
The position of machine, thus realize visible ray positioning function.This light projection technology need not be new electromagnetic spectrum license, also will not introduce
Electromagnetic interference to other equipment, indoor multipath reflected signal is weaker, compared to the location technology based on less radio-frequency, Ke Yida
To higher positioning precision.
Commercial visible ray location receiver mainly adopts two kinds of photo-sensitive cells at present：Imageing sensor (for example, CMOS,
CCD etc.) and photodetector (PD) (for example, PIN, APD etc.).Imageing sensor utilizes its Rolling shutter effect, works as launching light
When source (for example, LED) occurs light and shade change, become image can assume the striped of light and shade change, if light and shade striped is corresponded to
In 0,1 bit, then can achieve data information transfer, if this data message comprises framing signal content and (for example, launches the ID of light source
Information), you can realize light projection function.Because the Rolling shutter speed by imageing sensor is limited, based on imageing sensor
The observable signal band of receiver narrower, only few kilohertz, to kilohertz (that is, kHz magnitude), therefore, is based on
The receiver of imageing sensor requires its framing signal transfer rate can not be too high, should control in kHz magnitude.
And the responsive bandwidth of photodetector generally in hundreds of KHz to more than several megahertzs, therefore, based on light electrical resistivity survey
The location receiver surveying device does not limit too much to the transfer rate of framing signal, and its operating rate is limited solely by transmitting light source
The factors such as the power consumption of the responsive bandwidth of (for example, LED) and photodetector and whole machine.Receiver based on photodetector
Bandwidth of operation can be very high, more than the receiver bandwidth based on imageing sensor, it both can receive the positioning letter of two-forty
Number, the slow speed positioning signal requiring based on the receiver of imageing sensor can be received again simultaneously.
Can be seen that light projection receiver from above analysis due to using different types of photo-sensitive cell, working mechanism
Difference, the framing signal form that these location receivers require is different with characteristic.Current technology present situation is, different types of light
Location receiver corresponds to different types of light projection transmitter, does not carry out technological incorporation it is impossible to general, greatly limit light fixed
The development of position technology, is unfavorable for the popularization of light projection system and extensive popularization and application.If set up a kind of general have pervasive
The optical locating signal transmitter of property is so that the framing signal that same transmitter sends can be simultaneously by dissimilar photo-sensitive cell
The location receiver of (imageing sensor and photodetector etc.) detects demodulation simultaneously, and carries out framing signal parsing, then permissible
Greatly advance light projection system popularization and application, and user also have greatly degree of freedom select as needed dissimilar
Location receiver.
But, there is no Patents at present or technology be capable of simultaneously compatible dissimilar photo-sensitive cell position receiver confidential
The framing signal form asked.Therefore, how to provide a kind of general optical locating signal transmitter with universality be one urgently
Problem to be solved.
Utility model content
For technical problem present in prior art, a purpose of the present utility model is to provide a kind of light that is used for determine
The transmitter of position, can transmit the framing signal that different receivers are suitable for simultaneously, thus overcome positioning letter in prior art
Number can only detect the defect of demodulation for a type of receiver, improve versatility and the universality of transmitter.
In order to achieve the above object, the technical solution of the utility model is as follows：
A kind of transmitter for light projection is it is characterised in that this transmitter includes：Framing signal generating meanss, driving
Circuit and transmitting light source；
Described framing signal generating meanss produce general localizing emission signal, and described localizing emission signal includes low transmission
The first kind signal of speed and the Equations of The Second Kind signal of high transfer rate, wherein, described Equations of The Second Kind signal forms low rate envelope, institute
State low rate envelope and be designed as described first kind signal so that first kind signal and second in described localizing emission signal
Class signal can be detected by first kind receiver and Equations of The Second Kind receiver respectively simultaneously；
Described drive circuit drives transmitting light source to send out based on the localizing emission signal that described framing signal generating meanss produce
Light.
Described first kind signal adopts on-off keying OOK modulation format or pulsewidth modulation form PWM；
Described Equations of The Second Kind signal adopts one of following modulation format：On-off keying OOK modulation format, analogue signal are adjusted
Form processed, subcarrier modulation format.
Further, described subcarrier modulation format includes one of following modulation format：Phase-shift keying (PSK) (PSK), poor
Phase shift keying (DPSK), frequency shift keying (FSK) and (amplitude shift keying ASK).
Further, in the case that described Equations of The Second Kind signal adopts subcarrier modulation format, described framing signal occurs
Device realizes the multiplexing of multi-emitting light source frequency when producing described localizing emission signal by the frequency of assigning sub-carriers, to carry
High user capacity and capacity of resisting disturbance.
Further, described Equations of The Second Kind signal is operated in intermittency signal sending mode, when first kind signal level is high
Carry out the transmitting of Equations of The Second Kind signal, the not transmission signal when first kind signal level is low.
Further, described first kind signal takies the relatively low-frequency range of described localizing emission signal spectrum, described Equations of The Second Kind
Signal takies the higher frequency band of described localizing emission signal spectrum.
Further, the encoded signal that described first kind signal with signal frequency, has cycle characteristics or signal dutyfactor come
The ID of identification transmissions light source.
Further, described Equations of The Second Kind signal carries at least one in following information：Light source ID, data message, light source
Luminous model, Error Correction of Coding.
Further, the frame structure of described Equations of The Second Kind signal includes at least one of following field field：Synchronizing sequence
Frame header fields, light source id field, data information field, light source luminescent model field, Error Correction of Coding field, postamble field.
Transmitter of the present utility model provides a kind of localizing emission signal of fusion it is achieved that the first kind and Equations of The Second Kind connect
Receive the fusion of the confidential localizing emission signal format asked.Localizing emission signal after this fusion can transmit the first kind simultaneously connect
Two kinds of transmission signal forms required for receipts machine and Equations of The Second Kind receiver, compatibility adopts dissimilar photo-sensitive cell (PD and image
Sensor) localizing emission signal format needed for location receiver, make the different types of receiver all can be to same transmitter
The framing signal sending is demodulated decoding, until parsing location information.The utility model proposes it is logical for light projection
With signal transmitter, simplify the transmission signal design for light projection so that for light projection transmission signal have pervasive
Property, it is suitable for the light projection receiver using dissimilar photo-sensitive cell simultaneously, reduce light projection transmitter cost.
Attendant advantages of the present utility model, purpose, and feature will be partly illustrated by the following description, and
To partly become obvious for those of ordinary skill in the art after research hereafter, or can be according to reality of the present utility model
Trample and know.The purpose of this utility model and further advantage can be by written explanations and its claims and accompanying drawing
The structure specifically noted is realized and is obtained.
It will be appreciated by those skilled in the art that can be not limited to above with the objects and advantages that this utility model is realized
Specifically described, and will be more clearly understood, according to described further below, the above and other mesh that this utility model is capable of
's.
Brief description
With reference to the following drawings, it is better understood with many aspects of the present utility model.In accompanying drawing：
Fig. 1 is the structural representation of the transmitter in this utility model one embodiment for light projection.
Fig. 2 is the schematic diagram of general localizing emission signal in this utility model one embodiment.
Fig. 3 is the schematic diagram of general localizing emission signal in another embodiment of this utility model.
Fig. 4 is the example of general localizing emission signal format in this utility model one embodiment.
Fig. 5 is the example of general localizing emission signal format in another embodiment of this utility model.
Fig. 6 is the example of general localizing emission signal format in another embodiment of this utility model.
Fig. 7 is the example of general localizing emission signal format in another embodiment of this utility model.
Fig. 8 is the example of general localizing emission signal format in another embodiment of this utility model.
Fig. 9 is the example of the frame structure of first kind signal and Equations of The Second Kind signal in another embodiment of this utility model.
Specific embodiment
Below, preferred implementation of the present utility model is described in detail.The example of these preferred implementations exists
Illustrated in accompanying drawing.The embodiment of the present utility model describing shown in accompanying drawing and with reference to the accompanying drawings is merely exemplary
, and technical spirit of the present utility model and its primary operational are not limited to these embodiments.
Here, also, it should be noted in order to avoid having obscured this utility model because of unnecessary details, in the accompanying drawings
Illustrate only and the structure closely related according to scheme of the present utility model and/or process step, and eliminate and this practicality
The little other details of new relationship.
For meeting universality, the utility model proposes a kind of general framing signal form for light projection, this is fixed
Position signal format has merged using imageing sensor (for example, CMOS, CCD etc.) as the low speed positioning letter needed for location receiver
Number form and using photodetector (PD) (for example, PIN, APD etc.) as the high speed framing signal lattice needed for location receiver
The technical characteristics such as formula.More specifically, this utility model provides a kind of localizing emission signal (framing signal) of fusion, this positioning is sent out
Penetrate signal and include low transmission rate framing signal and high transfer rate framing signal, wherein, high transfer rate framing signal is formed
Low rate envelope, this low rate envelope is designed as low transmission rate framing signal so that low biography in localizing emission signal
Defeated speed framing signal and high transfer rate framing signal can be respectively by the receivers based on imageing sensor with based on PD's
Receiver detects simultaneously.That is, this utility model using the high speed being used for PD receiver framing signal envelope as imageing sensor
Low speed signal needed for receiver.Framing signal after this fusion can transmit high speed and two kinds of signal formats of low speed simultaneously,
The compatible framing signal form adopting needed for dissimilar photo-sensitive cell (PD and imageing sensor) light projection receiver.Additionally,
This utility model also makes full use of framing signal transmission more data information, is communicated so that launching light while positioning
The signal that source (for example, LED) is sent can be demodulated parsing by imageing sensor and photodetector (PD) simultaneously, realizes
Positioning and data communication function.
Hereinafter, for the ease of follow-up word description, we will be based on imageing sensor (for example, CMOS, CCD etc.)
Location receiver is referred to as first kind receiver.The framing signal of the relatively low transmission rate required by first kind receiver is referred to as first
Class signal.Location receiver based on photodetector is referred to as Equations of The Second Kind receiver by us.Required by Equations of The Second Kind receiver
The framing signal of higher transmission rates is referred to as Equations of The Second Kind signal.Herein, " first kind receiver ", " Equations of The Second Kind receiver " are only used for
Different types of receiver is distinguished, and is not limited in the receiver based on imageing sensor and the receiver based on PD.
Equally, " first kind signal " and " Equations of The Second Kind signal " is also only used for distinguishing the unlike signal required by different types of receiver,
And be not limited in based on the signal required by this two classes receiver of imageing sensor and PD.
That is, the utility model proposes a kind of transmitter for light projection, this transmitter has merged the first kind
The technical characteristics such as the framing signal form of the framing signal form of receiver requirement and the requirement of Equations of The Second Kind receiver.This utility model
Framing signal (Equations of The Second Kind signal) characteristic that Equations of The Second Kind receiver is required is transformed, while transmitting location information,
Increased more data messages so as to have communication positioning fusion function, and make the transfer rate of Equations of The Second Kind signal be higher than the
The transfer rate of one class signal, on this basis, allows Equations of The Second Kind signal be operated in intermittent transmission pattern, and will now believe Equations of The Second Kind
Number low rate envelope being formed is designed as the framing signal (first kind signal) that first kind receiver requires, it is achieved thereby that first
The fusion of the framing signal form of class and the requirement of Equations of The Second Kind receiver.Framing signal after this fusion can transmit first simultaneously
Two kinds of framing signal forms required for class receiver and Equations of The Second Kind receiver, compatibility is using dissimilar photo-sensitive cell (as PD
And imageing sensor) framing signal form needed for location receiver, make the different types of receiver all can be to same transmitting
The framing signal that machine sends is demodulated decoding, until parsing location information.
This utility model is used for light projection technical field, is not only suitable for visible ray field of locating technology it can also be used to non-can
See light projection technical field, for example, laser positioning, the field such as infrared light projection.
It is illustrated in figure 1 the structural representation of the transmitter being used for light projection in this utility model one embodiment.As Fig. 1 institute
Show, this transmitter includes：Framing signal generating meanss 101, drive circuit 102 and transmitting light source 103.
Wherein, wherein, framing signal generating meanss 101 produce the general localizing emission letter that this utility model is proposed
Number, that is, this localizing emission signal includes the first kind signal of low transmission rate and the Equations of The Second Kind signal of high transfer rate, wherein, the
Two class signals form low rate envelopes, low rate envelope be designed as first kind signal so that in localizing emission signal the
One class signal and Equations of The Second Kind signal can be detected simultaneously by by first kind receiver 201 and Equations of The Second Kind receiver 202 respectively.
Drive circuit 102 drives transmitting light source based on the general localizing emission signal that framing signal generating meanss 101 produce
103 light.More specifically, being based on localizing emission signal produced by framing signal generating meanss 101, drive circuit 102 can
To drive transmitting light source to produce visible ray or the black light carrying this localizing emission signal, thus first kind receiver 201 He
The framing signal that Equations of The Second Kind receiver 202 all can send to same transmitter is demodulated decoding, thus parsing positioning
Information.
Framing signal generating meanss 101 can produce framing signal by software it is also possible to produce positioning letter by hardware
Number.Framing signal generating meanss 101 can be realized using digital device (for example, FPGA, CPLD, MCU etc.), may also be employed special
Chip is realized.The signal that framing signal generating meanss 101 produce controls transmitting light source 103 to light through drive circuit 102, will position
Signal provides location information and data communication services for dissimilar receiver with form of light waves to ambient radiation.
Below in conjunction with accompanying drawing, framing signal is described in more detail.
Fig. 2 show the schematic diagram of general localizing emission signal in this utility model one embodiment, and Fig. 3 show this practicality
The schematic diagram of general localizing emission signal in new another embodiment.As shown in Figures 2 and 3, the corresponding envelope of the thick line (first kind
Signal) as the localizing emission signal required by first kind receiver, and the signal waveform in thick envelope receives for Equations of The Second Kind
Localizing emission signal (Equations of The Second Kind signal) required by machine.It can be seen in fig. 2 that the transfer rate of Equations of The Second Kind signal is more than the first kind
The transfer rate of signal, Equations of The Second Kind signal is operated in intermittency signal emission mode, is high level (i.e. envelope only in first kind signal
Level is height) when carry out signal transmitting, and (envelope level be low) does not carry out Equations of The Second Kind when first kind signal is low level
Signal is launched.Equations of The Second Kind signal waveform and form can adopt more modulation form, for example, using OOK (on-off keying), or adopt
Adopt subcarrier with PSK (phase-shift keying (PSK)), DPSK (differential phase keying (DPSK)), FSK (frequency shift keying), ASK (amplitude shift keying) etc.
Digital signal modulated form, it would however also be possible to employ various analogue signal modulation formats, framing signal generating meanss are by rationally simultaneously
Distribution and the frequency of design subcarrier, can achieve multiple shot-light frequency multiplexing, improve user capacity, and reduce light interference.First
Class signal (i.e. Equations of The Second Kind signal is operated in the envelope being formed during intermittency signal emission mode) can adopt but be not limited to OOK, PWM etc.
Modulation format, transmits Equations of The Second Kind signal in the high level of these modulation formats.Fig. 2 gives first kind signal and adopts OOK to adjust
During form processed, in its high level, transmission is using the Equations of The Second Kind signal of OOK modulation format.Fig. 3 gives first kind signal and adopts
During OOK modulation format, in its high level, transmission is using the Equations of The Second Kind signal of subcarrier modulation format.
Framing signal described above merges it is also possible to be illustrated from the angle of frequency division multiplexing.This utility model will lead to
Distribute to Equations of The Second Kind signal with the high band of localizing emission signal spectrum, low-frequency range distributes to first kind signal, simultaneously low-frequency range
Distribution design avoid the interference band (for example, 50Hz, 60Hz even hundreds of hertz) of ambient light.
For changing an angle, the general localizing emission signal that transmitter of the present utility model produces adopts intermittent transmission mode
Transmission first kind signal and Equations of The Second Kind signal simultaneously, wherein first kind signal are the transmitting letters meeting first kind receiver requirement
Number, Equations of The Second Kind signal is the transmission signal meeting Equations of The Second Kind receiver requirement.During the transmitting of localizing emission signal, transmission the
Two class signals；In the tempus intercalare of localizing emission signal, stop sending signal.The interruption moment of localizing emission signal and duration can
Controlled by first kind signal, when first kind signal is changed into high level, starts transmitting Equations of The Second Kind signal, and in first kind signal be
Equations of The Second Kind signal is persistently launched between high period；When first kind signal is changed into low level, shutdown signal is launched.Therefore, second
Class signal only transmits between the high period of first kind signal, and does not transmit between the low period of first kind signal.Positioning is sent out
Penetrate signal and achieve first kind signal and the fusion of Equations of The Second Kind signal, make first kind receiver and Equations of The Second Kind reception function simultaneously right
Localizing emission signal is demodulated parsing, and realizes positioning function.
Above-mentioned understand, the utility model proposes localizing emission signal fused can transmit first kind receiver and the simultaneously
Two kinds of transmission signal forms required for two class receivers, compatible fixed using dissimilar photo-sensitive cell (PD and imageing sensor)
Localizing emission signal format needed for the receiver of position, makes the positioning that different types of receiver all can send to same transmitter
Signal is demodulated decoding, until parsing location information.
At position receiver end, first kind receiver adopts the imageing sensor of Rolling shutter mode, its Exposure mode be by
Row pixel is exposed, when certain a line is in exposure stage, if the utility model proposes localizing emission signal envelope electricity
When putting down as high level, then optical signal reaches imageing sensor, and this row pixel is " bright "；If the envelope of localizing emission signal is 0, that is,
It is in then it represents that no optical signal reaches imageing sensor during low level, this row pixel is " dark ".It should be noted that for ensureing
First kind receiver demodulates transmission signal in a manner described, it is necessary to assure the time of exposure of every one-row pixels is much larger than transmission signal
The symbol period of middle Equations of The Second Kind signal, so just can ensure that first kind receiver is effectively observed the envelope of localizing emission signal
(i.e. first kind signal), realizes location information parsing.
For first kind receiver, the ID numbering launching light source (for example, LED) can be by first kind signal with data
Coding form (such as loop coding), different signal frequencies, or the mode such as different signal dutyfactor (PWM) distinguishes transmitting
The ID numbering of light source.After receiving the localizing emission signal of transmitting light source, you can obtain the corresponding ID numbering launching light source
And space coordinatess, then the locus coordinate being solved receiver by location algorithm.
For Equations of The Second Kind receiver, because the responsive bandwidth of photodetector (PD) is higher, can simultaneously Real-time Collection to complete
Whole localizing emission signal (including the signal in signal envelope and envelope, i.e. first kind signal and Equations of The Second Kind signal).Therefore,
Equations of The Second Kind receiver can detect the information such as the transmitting light source ID comprising in first kind signal, can detect containing richer again
The Equations of The Second Kind signal of rich information.In actual applications, Equations of The Second Kind signal, in addition to the ID numbering of transmission transmitting light source, also can transmit
The information such as the coordinate of transmitting light source, luminous intensity, the spatial distribution of luminous intensity, luminous model are it is possible to implant some
The communication information, for example, the data message such as advertisement, text, audio frequency, video.
Example 1
Fig. 4 is the example of general localizing emission signal format in an embodiment.As shown in figure 4, first kind signal is operated in
OOK modulation format, produce " 10011010 " data, can as transmitting light source (for example, LED) ID number information,
Traffic rate is few kilohertz magnitude.In each high level stage of first kind signal, transmit the data ratio of Equations of The Second Kind signal
Special information, for example, 100 bit datas.The traffic rate of Equations of The Second Kind signal is in hundreds of more than kHz.As can be seen that first kind letter
Number be Equations of The Second Kind signal envelope.Equations of The Second Kind signal can be using OOK modulation format as shown in Figure 4, it would however also be possible to employ number
Word or simulation subcarrier modulation format.
Example 2
Fig. 5 is the example of general localizing emission signal format in another embodiment.As shown in figure 5, the work of first kind signal
In OOK modulation format, Manchester's code can be adopted, produce " 1101 " data, can be used as transmitting light source (for example, LED)
ID number information, traffic rate be few kilohertz magnitude.In each high level stage of first kind signal, transmit Equations of The Second Kind
The data bit information of signal, for example, 100 bit datas.Equations of The Second Kind signal adopts OOK modulation format, and traffic rate is counting
Hundred more than kHz.As can be seen that first kind signal is the envelope of Equations of The Second Kind signal.
Example 3
As shown in fig. 6, first kind signal is operated in OOK modulation format, (also can not adopt graceful thorough using Manchester's code
Si Te encodes), produce " 1101 " data, as the ID number information of transmitting light source (for example, LED), traffic rate can be
Few kilohertz magnitude.In each high level stage of first kind signal, transmit the data bit information of Equations of The Second Kind signal.Second
Class signal adopts subcarrier modulation format, and subcarrier signal mid frequency is hundreds of KHz extremely number MHz, closes in locus
Can be made a distinction by without subcarrier frequency between lamp, to reduce interference, improve user capacity.As can be seen that first kind signal
It is the envelope of Equations of The Second Kind signal.
Example 4
As shown in fig. 7, first kind signal can be using the frequency signal being repeated cyclically or the volume with cycle characteristics
Code signal distinguishing different transmitting light sources (for example, LED), the ID numbering of identification transmissions light source.
Example 5
As shown in figure 8, first kind signal can adopt PWM (pulsewidth modulation) form, using its different operating frequency and
Dutycycle encodes to transmitting light source (for example, LED), to distinguish different transmitting light sources.Fig. 8 is to be marked with different dutycycles
Know the ID numbering of transmitting light source.
Example 6
Fig. 9 gives one group of transmission signal frame structure instantiation.Wherein, the frame structure of first kind signal can be as Fig. 9 (a)
Shown, wherein, in order to obtain the original position of a frame, follow-up data bits can be used as transmitting light source for synchronizing sequence (frame head)
The ID numbering of (for example, LED), in order to distinguish different transmitting light sources.If first kind signal is using the frequency being repeated cyclically
Signal or the encoded signal with cycle characteristics, also can be not provided with synchronizing sequence (frame head).
Shown in the frame structure of Equations of The Second Kind signal such as Fig. 9 (b), it is synchronizing sequence (frame head) first, be transmitting light source (example afterwards
As LED) ID number in order to identify different transmitting light sources.Data information field can include launching the work shape of light source
State, position coordinateses, advertisement and other data message etc., this data information field is optional.If not sending data message, retain this
Data information field.The luminous model field of transmitting light source afterwards can be filled by beam spatial distribution model, luminous work(
The light source parameters information such as rate, finally does Error Correction of Coding additional postamble by BCH code or RS code to data before.
In sum, this utility model provides a kind of transmitter for light projection, the positioning letter that this transmitter produces
Number the localizing emission signal lattice that the localizing emission signal format of first kind receiver requirement and Equations of The Second Kind receiver require are merged
The technical characteristics such as formula.This utility model is transformed by the transmission signal characteristic that Equations of The Second Kind receiver is required, Jiang Qibao
Transmission signal that network requires as first kind receiver is it is achieved that the localizing emission signal that requires of the first kind and Equations of The Second Kind receiver
The fusion of form.Localizing emission signal after this fusion can transmit needed for first kind receiver and Equations of The Second Kind receiver simultaneously
The two kinds of transmission signal forms wanted, compatibility is using needed for dissimilar photo-sensitive cell (as PD and imageing sensor) location receiver
Localizing emission signal format, so that the framing signal that different types of receiver all can send to same transmitter is demodulated
Decoding, until parse location information.The utility model proposes the universal signal transmitter for light projection, simplify for
The transmission signal design of light projection, so that the transmission signal for light projection has universality, is suitable for using dissimilar simultaneously
The light projection receiver of photo-sensitive cell, reduces light projection transmitter cost.
Each several part of the present utility model can be realized with hardware, software, firmware or combinations thereof.For example, if
Realized with hardware, and the same in another embodiment, any one of following technology that can be known altogether with this area or
Their combination is realizing：There is the discrete logic of the logic gates for data signal is realized with logic function, tool
There are the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array
(FPGA), CPLD (CPLD) etc..
Represent in flow charts or the logic that otherwise describes of here and/or step, for example, it is possible to be considered as
For realizing the order list of the executable instruction of logic function, may be embodied in any computer-readable medium, with
For instruction execution system, device or equipment (system as computer based system, including processor or other can be from instruction
Execution system, device or equipment instruction fetch the system of execute instruction) use, or combine these instruction execution systems, device or
Equipment and use.
In this utility model, for the description of embodiment and/or the feature that illustrates, can one or more its
Use in the same manner or in a similar manner in its embodiment, and/or combine with the feature of other embodiment or replace
The feature of other embodiment.
It should be noted that above-described embodiment is only, and this utility model and unrestricted patent model of the present utility model are described
Enclose, any based on equivalents technology of the present utility model, all should be in scope of patent protection of the present utility model.
Claims (9)
1. a kind of transmitter for light projection is it is characterised in that this transmitter includes：Framing signal generating meanss, driving electricity
Road and transmitting light source；
Wherein, described framing signal generating meanss produce general localizing emission signal, and described localizing emission signal includes low biography
The first kind signal of defeated speed and the Equations of The Second Kind signal of high transfer rate, wherein, described Equations of The Second Kind signal forms low rate envelope,
Described low rate envelope is designed as described first kind signal so that the first kind signal in described localizing emission signal and
Two class signals can be detected by first kind receiver and Equations of The Second Kind receiver respectively simultaneously；
Described drive circuit drives transmitting light source luminescent based on the localizing emission signal that described framing signal generating meanss produce.
2. the transmitter for light projection according to claim 1 it is characterised in that：
Described first kind signal adopts on-off keying OOK modulation format or pulsewidth modulation form PWM；
Described Equations of The Second Kind signal adopts one of following modulation format：On-off keying OOK modulation format, analogue signal modulation lattice
Formula, subcarrier modulation format.
3. the transmitter for light projection according to claim 2 is it is characterised in that described subcarrier modulation format includes
One of following modulation format：Phase-shift keying (PSK) PSK, differential phase keying (DPSK) DPSK, frequency shift keying fsk and amplitude shift keying ASK.
4. the transmitter for light projection according to Claims 2 or 3 is it is characterised in that adopt in described Equations of The Second Kind signal
In the case of subcarrier modulation format, described framing signal generating meanss are when producing described localizing emission signal by changing
The frequency of subcarrier come to realize multi-emitting light source multiplexing, to improve user capacity and capacity of resisting disturbance.
5. the transmitter for light projection according to claim 1 is it is characterised in that between described Equations of The Second Kind signal is operated in
Have a rest signal sending mode, carry out the transmitting of Equations of The Second Kind signal when first kind signal level is high, when first kind signal level is
Not transmission signal when low.
6. the transmitter for light projection according to claim 1 is it is characterised in that described first kind signal occupancy is described
The relatively low-frequency range of localizing emission signal spectrum, described Equations of The Second Kind signal takies the higher frequency band of described localizing emission signal spectrum.
7. the transmitter for light projection according to claim 1 is it is characterised in that described first kind signal is with signal frequency
Rate, the encoded signal of cycle characteristics or signal dutyfactor is had to carry out the ID of identification transmissions light source.
8. the transmitter for light projection according to claim 1 it is characterised in that described Equations of The Second Kind signal carry following
At least one in information：Light source ID, data message, light source luminescent model, Error Correction of Coding.
9. the transmitter for light projection according to claim 8 is it is characterised in that the frame structure of described Equations of The Second Kind signal
Including at least one of following field field：Synchronizing sequence frame header fields, light source id field, data information field, light source are sent out
Light model field, Error Correction of Coding field, postamble field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620871988.3U CN205945753U (en) | 2016-08-11 | 2016-08-11 | A transmitter for optical locating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301555A (en) * | 2016-08-11 | 2017-01-04 | 北京大学 | A kind of signal transmitting method for light projection and transmitter |
| CN108631868A (en) * | 2018-03-07 | 2018-10-09 | 华南理工大学 | A kind of dynamic testing method and its system for dynamic visible light communication |
| CN111033189A (en) * | 2017-07-03 | 2020-04-17 | 马尔苏普拉控股公司 | Light-based communication system |
-
2016
- 2016-08-11 CN CN201620871988.3U patent/CN205945753U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301555A (en) * | 2016-08-11 | 2017-01-04 | 北京大学 | A kind of signal transmitting method for light projection and transmitter |
| CN106301555B (en) * | 2016-08-11 | 2019-01-15 | 北京大学 | A kind of signal transmitting method and transmitter for light-seeking |
| CN111033189A (en) * | 2017-07-03 | 2020-04-17 | 马尔苏普拉控股公司 | Light-based communication system |
| CN108631868A (en) * | 2018-03-07 | 2018-10-09 | 华南理工大学 | A kind of dynamic testing method and its system for dynamic visible light communication |
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