CN108702035A - It charges to remote radio frequency identification label - Google Patents
It charges to remote radio frequency identification label Download PDFInfo
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- CN108702035A CN108702035A CN201780014998.2A CN201780014998A CN108702035A CN 108702035 A CN108702035 A CN 108702035A CN 201780014998 A CN201780014998 A CN 201780014998A CN 108702035 A CN108702035 A CN 108702035A
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- label
- energy
- transmitter
- capacitor
- reader
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
- H04Q2209/47—Arrangements in telecontrol or telemetry systems using a wireless architecture using RFID associated with sensors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/88—Providing power supply at the sub-station
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Near-Field Transmission Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of system for charging to remote radio frequency identification label includes multiple physically separated transmitters.Each transmitter is configured to corresponding energy beam being directed to energy position.Label is in energy position.Label is configured to the reception energy of storage energy position, sensing sensor data, and sensing data is sent to reader after the capacitor for being connected to label is charged to operation voltage level.Capacitor is charged by reception energy.Controller is configured to:In response to the equipment response of the label, each transmitter being directed at energy position in multiple transmitters, the corresponding frequencies of each corresponding energy beam and at least one of respective phase and corresponding polarity are aligned, so that the energy level at energy position maximizes.
Description
Cross reference to related applications
The application is that require to submit on January 8th, 2016 entitled " charges to no battery remote RFID tag
The U.S. Provisional Application No. 62/ of the co-pending of (CHARGING BATTERY-LESS LONG-RANGE RFID TAGS) "
The application for a patent for invention of 276, No. 285 priority, entire contents are incorporated herein by reference.
Technical field
The disclosure relates generally to be used for the wireless energy transfer of radio frequency identification (RFID) label, and relate more specifically to
The chargeable range of extended RFID tag.
Background technology
Radio frequency identification (RFID) label is used in various different environment, including the cargo identification in warehouse and ring
Border senses.The energy storage capability of label limits the read range between label and reader.With tag processes ability
It improves, the consumption of limited storage energy can also be increased, to further limit read range.In addition, label and reading
Transmission medium between device may also can cause to limit to range.For example, the embedded label in the car for the ease of manufacture
Or the label being embedded in clothing will include the material in addition to free space air between tags and a reader.
Under normal conditions, label is using battery come storage energy, and this measure increases the cost of label and increases its ruler
It is very little.Alternatively, near field technique has been used, but this kind of technology is confined to short distance (for example, in several centimetres magnitude),
And depend on inductance or capacitive coupling.RFID tag needs not need network share (tether), need not use not
The high power levels of safety need not apply unreasonable limitation to the placement of the charging station for powering to RFID tag
Implement the effective means of remote power-feeding in environment.
Invention content
As will be appreciated, embodiment disclosed herein includes at least following embodiment.In one embodiment, Yi Zhongyong
In including being configured to for the first energy beam to be directed to the first of energy position to the system that charges of remote radio frequency identification label
Transmitter.Second transmitter is configured to the second energy beam being directed to energy position.Second transmitter and first transmitter physics
Upper separation.Label is in energy position.Label is configured to:Reception energy of the storage from energy position, sensing sensor data,
And sensing data is sent to reader after label is in energy position certain period of time.Controller is configured to:It rings
It should be responded in the equipment of label, by the second frequency pair of the first frequency of the first energy beam and the second energy beam at energy position
Standard, and by least one of the first phase of the first energy beam and the first polarity and the second phase of the second energy beam and
A corresponding alignment in two polarity, to make the energy level at energy position maximize.
The alternate embodiment of system for charging to remote radio frequency identification label include one of following characteristics or its
Any combinations.Reader and first transmitter are integrated using the first energy beam of antenna guide of first transmitter and to connect
Receive sensing data.Reader is integrated with first transmitter to guide the first energy using the first antenna of first transmitter
Amount beam and receiving sensor data and the second reader and second transmitter are integrated to utilize the of second transmitter
Two the second energy beams of antenna guide and receiving sensor data.Equipment response is received signal strength indicator symbol and is dissipated using reversed
It penetrates from one in the amplitude of the reception energy from the label that label transmits.Label further includes capacitor, which is configured to
It is charged to operation voltage level to receiving the reception of energy in response to label, the wherein period is equal to and capacitor charges
To the charging time of the operation voltage level measured by the voltage monitor for being connected to capacitor.Label be configured to capacitor not
The default content of the memory of label is sent when being charged to operation voltage level, and label is configured to be electrically charged in capacitor
It is sensed after to operation voltage level and sends sensing data.The default content of memory includes one of the following:Indicate storage
The value that clears data of the removing state of device, indicate capacitor uncharged state semaphore (semaphore), indicated from last time
The semaphore of sensing data whether has been sensed after transmission, indicate the timestamp value of time that memory is eliminated and
Indicate the received signal strength indicator symbol of the signal strength of reception energy.Label is configured to sensing sensor data, by sensor
Data are stored in the memory of label, and are set after preserving sensing data in response to label to receiving the reception of energy
Semaphore is set, and sensing data is just only sent to reader when semaphore is set and is read device inquiry, wherein
The period is equal to sensing time of the label at which after energy position for the semaphore to be arranged.The period is solid
The fixed duration.Energy position is moved to new energy position after that period of time, and energy position is at least partly
It is determined according to multiple reference labels, each reference label sends opposite with the reception signal strength of energy at corresponding reference label
The correspondingly received signal strength indicator answered.Controller, which is configured to detect in response to controller, to be had and corresponding first transmitting
The background energy of device or the identical frequency of second transmitter deactivates at least one of first transmitter and second transmitter.
In another embodiment, a kind of method for charging to remote radio frequency identification label includes by the first transmitting
First energy beam is directed to energy position by device.The second energy beam is guided with the second transmitter of first transmitter physical separation
To energy position.Label stores the reception energy from energy position at energy position.Felt using the reception energy of storage
Survey sensing data.After label is in energy position certain period of time, using the reception energy of storage by sensing data
It is sent to reader from label.Controller responds the first frequency at energy position by the first energy beam in response to the equipment of label
Rate is aligned with the second frequency of the second energy beam, and by least one of the first phase of the first energy beam and the first polarity
One corresponding in the second phase of the second energy beam and the second polarity is aligned, so that the energy level at energy position
It maximizes.
The alternate embodiment of method for charging to remote radio frequency identification label include one of following characteristics or its
Any combinations.The equipment response of label is determined according to received signal strength indicator symbol (RSSI), which is the reception at label
The measured value of energy.Label carrys out transmission equipment using backscattering and responds, and equipment response is based on the reception energy at label
The amplitude of amount.Storage further include charged to the capacitor for being connected to label to store reception energy, and further include measure
Capacitor on operation voltage level, be used to determine the amount for receiving energy, wherein label is not charged in capacitor
The default content of the memory of label is sent when operating voltage level, and label is charged to operation voltage level in capacitor
It senses later and sends sensing data.Sensing data is preserved after sensing sensor data, in response to sensing data
Preservation and setting signal amount, and only provided with the semaphore in response to the inquiry of reader, send and protect
The sensing data deposited.Energy position determines that reference label is sent and connecing at corresponding reference label according to multiple reference labels
Receive the corresponding correspondingly received signal strength indicator of signal strength of energy.In response to controller detect with it is corresponding
The background energy of first transmitter or the identical frequency of second transmitter deactivates in first transmitter and second transmitter extremely
It is one few.
In another embodiment, it is a kind of for the system that charges of remote radio frequency identification label include it is multiple physically
The transmitter of separation.Each transmitter is configured to corresponding energy beam being directed to energy position.Label in energy position is matched
Reception energy of the storage from energy position, sensing sensor data are set to, and are electrically charged in the capacitor for being connected to label
Sensing data is sent to reader after to operation voltage level.Capacitor is charged by reception energy.Controller is matched
It is set to:In response to the equipment response of label, each transmitter being directed at energy position in multiple transmitters, by each phase
The corresponding frequencies and at least one of respective phase and corresponding polarity for answering energy beam are aligned, so that energy position
The energy level at place maximizes.
The alternate embodiment of system for charging to remote radio frequency identification label include one of following characteristics or its
Any combinations.Equipment response is received signal strength indicator symbol and the reception energy using backscattering from the label that label transmits
One in the amplitude of amount.
Description of the drawings
The present invention is illustrated and is not limited by the accompanying figures by way of example, in the accompanying drawings, identical attached drawing mark
Note indicates similar element.Element in attached drawing shows for the sake of simple and is clear, these elements not necessarily press than
Example is drawn.
Fig. 1 is the schematic diagram of the various classification of transmitter and the operation mode of RFID reader.
Fig. 2 is the schematic diagram of the various classification of RFID tag and the operation mode of reference label.
Fig. 3 is the schematic diagram of the first embodiment of the system with integrated transmitter and RFID reader.
Fig. 4 is the flow chart diagram for the method for system shown in operation diagram 3.
Fig. 5 is the schematic diagram of the second embodiment of the system with the RFID sensings and RFID communication that are detached on the time.
Fig. 6 is the flow chart diagram for the method for system shown in operation diagram 5.
Fig. 7 is the flow chart diagram of bubble traveling method according to third embodiment.
Fig. 8 is the 4th reality using the system with improved opereating specification of the bubble walking with RFID reference labels
Apply the schematic diagram of example.
Fig. 9 is the flow chart diagram of the method for operating system shown in fig. 8.
Figure 10 be for while frequency interferences are minimized by embodiment of the disclosure and existing radio infrastructure
The flow chart of integrated method illustrates.
Figure 11 is the flow of the method according to an embodiment of the present disclosure for charging to remote radio frequency identification label
Figure diagram.
Specific implementation mode
The embodiment of system and method described herein provide to RFID tag it is long-range charging and with RFID tag
Communication, to extend the read range of passive radio frequency identification (RFID) label and enhance passive radio frequency identification (RFID) label
Ability.The system includes the subsystem for the subsystem of wireless charging and for RFID communication.The example of this paper is utilized
Similar to the long-range UHF RFID protocols of the 1st class 2nd generations of EPC (1 Generation 2 of EPC Class) agreement, however, these
Example can easily be generalized to any reader and first say that (reader-talk-first) agreement or label first say (tag-
Talk-first) agreement.
What Fig. 1 and Fig. 2 were indicated be different labels, RFID reader and transmitter embodiment operation mode it is exemplary
Classification.Different embodiments is presented underneath with the combination of these classification, realizes spreading range operation.With reference to figure 1, base
Classify to system in following content:How transmitter is attached with RFID reader or integrate (110);Transmitter is only
Transmission power or both transmission power and data (120);And at transmitter about in its frequency, phase and polarity
At least one decision or based on the feedback from reference label, is still not based on based on the feedback from RFID tag
Any of the two (130).In one embodiment, the frequency of transmitter is the case where not needing RFID tag feedback
Under locally adjusting.
Referring to Fig. 2, in label-side, the system communicated to label from transmitter receipt power and with RFID reader adds
To distinguish.In some embodiments, " transmitter " is also referred to as power access point (PAP).In one embodiment, from transmitter
The energy of reception and (161) are operated in identical frequency range with the communication of RFID reader, therefore label only needs one
Root antenna, or grasped alternatively from the energy of transmitter receipt and from the communication of RFID reader in different frequency ranges
Make (160).In addition, label can have different energy storage requirements (170), these energy storage requirements are from very small electricity
Appearance (171) (for example, ready-made passive UHF RFID tags, wherein needing continuously to supply energy to label to carry out
Operation) it is differed to very big capacitance (173) (wherein energy can store a few minutes).Label can based on following the description come into
Row is distinguished:Need in label designs whether the custom hardware (190) realized and label by its RSSI value send back transmitter
Or RFID reader (180).In addition, label can send RSSI value (181), and the passive or semi-passive label the case where
Under, it is inferred to RSSI value (182) from back-scatter data.
The example classes of Fig. 1 and Fig. 2, which are shown, is considering select emitter classification (coming from Fig. 1) and compatible tag classification
A variety of possible combinations in the case of (coming from Fig. 2).Many possible combinations are compatible in individual system.For example, given
The transmitter of classification can be communicated with the label (or receiver of transmitted energy) of multiple and different classification or Xiang Qiti
For power.Following embodiment is intended to illustrate exemplary use case, is not construed as limiting the various combination of transmitter and label
Classification.
First embodiment:
First embodiment provide it is a kind of by integrated rfid reader and transmitter come the processing capacity of extension tag
Method.Transmitter not only can using continuous wave (CW) energy beam come be sent to the power needed for tag energy, but also can send out
Send communication data.If the phase or polarity of communicating data signals are synchronous (for example, the phase of two or more transmitters is
Alignment), then it will expanding communication range.If the phase of communicating data signals is synchronous, communication range with polarity
It will further be expanded.In one embodiment, this system can be used for the processing capacity of expandable passive sensor tag.
In another embodiment, which can be used for extending the range of ready-made passive label.Standard RFID protocol or custom protocol can
For reading label.
What Fig. 3 was indicated is the processing capacity for improving the passive label with integrated transmitter and RFID reader
The embodiment of system.Transmitter is integrated with RFID reader, and therefore, this system corresponds to the classification 117 in Fig. 1.Separately
Outside, during integrated system not only sends continuous wave to label supply power, but also sends RFID data, therefore it is with Fig. 1
122 is related.Transmitter and RFID reader system operate under identical frequency range (161 in Fig. 2).For example, transmitter
To label transmission power under the identical frequency for being used for reading label with RFID reader.Labeling requirement storage energy is to wake up electricity
Sub- device is sensed (172 in Fig. 2 or 173), and needs custom hardware, such as passive RFID tags and sensor (193).
If there is be useful for obtain RSSI customization electronic device, then RFID tag can send RSSI value (181), alternatively, label
Can backscattering only be carried out to the reception signal of label, so as to be inferred to RSSI (182) at RFID reader.
In figure 3, RFID reader and transmitter are integrated in together.Consider two different embodiments.
In the first embodiment, RFID reader only is served as there are one transmitter (such as 201), and RFID orders can be transmitted simultaneously
Receive the data of label.Every other transmitter sends CW energy only under frequency identical with transmitter/reader 201.
In second of embodiment, all transmitters serve as RFID reader, and send energy and RFID orders and receive label
Data.In the example of agreement shown in Fig. 4, it will be considered that the first embodiment.It is sent out from 220 remote control of computer system
Emitter.Label 210 includes antenna and passive label IC (211), for being communicated with RFID reader.In addition, it includes all
As (it is used to open when capacitor 215 is fully charged for memory element, the electric voltage observation circuit (212) of capacitor (215) etc
Open sensor logic) and sensor and micro controller system (213).When obtaining sensing data, bus is used
(214) (such as serial i 2C buses) sends it to the internal storage of (211) passive label IC.
In the present embodiment, until being collected into enough charges just meeting turn on sensor 213 on the capacitor, and thus
Operation is passive label and realizes relatively large read range by label.Under normal conditions, by making label become more multiple
Miscellaneous (for example, adding more electronic devices), can reduce read range.Therefore, enough until being collected into label 210
Energy can just open the high electronic device of power consumption (such as 213).It is charged to capacitor 215 by opening transmitter, it will
It is collected into the additional-energy for sensing.Fig. 4 shows the embodiment of the agreement of the system presented in Fig. 3.Consider first
Kind embodiment, only one of which transmitter are integrated with RFID reader (such as 201) and/or are read using RFID
Device (such as 201).Initially, reader (201) starts to read label.It there may be multiple labels in read range.It reads
Device (201) reads (for example, unification) label (210) using standard RFID protocol.It sends and orders to label in reader
After enabling (301), label is made a response (311) with its identification number (ID).After identifying label, reader (201) continues
Additional command is sent, to read the content of the memory of label.The order is referred to as:READ (reading) is ordered.Sending READ
During order, it will open and/or guide other transmitters (202,203) to provide additional-energy to label.202 He of transmitter
203 are aligned to send CW energy under frequency identical with transmitter/reader 201.In the present embodiment, label is with identical
The content of memory location makes a response read command (312).Reader/transmitter 201 receives the response from label,
Extraction RSSI and the phase for adjusting transmitter, and send another read command 302.Since more energy are provided to
Label, therefore the capacitor of label-side will be electrically charged.When providing enough energy, sensor will be opened, and can hold
Row senses and the data of sensing is stored in memory location.Now, the content of the memory location by with difference before
(313).After reading the memory location using read command next time, reader will read new value, and this just anticipates
Taste label and performs sensing (303).It that case, reader 201 will continue to read other labels.In various embodiments
In, the memory of label will be eliminated after being read.In another embodiment, the memory of label includes indicating to store
The semaphore (for example, being set as indicating the retention there is no sensing data) that device has been updated or has removed.In another implementation
In example, the memory of label includes the timestamp of the local clock for the time for indicating that memory is updated.
Another embodiment include can such label, can be in response to read command (for example, in response to
Reading order before enough energy are provided) estimation receives RSSI value and sends the RSSI value, rather than send the same memory
The content of position.This embodiment for adjusting the phase of transmitter for that will be advantageous, but it may increase mark
The complexity of hardware is signed, the read range of label is thus influenced.
Other than only spreading range, the positioning to label can also be performed in system.Due to the phase of known multiple transmitters
RSSI value at position and RFID reader, therefore, this information can be used for the position of estimation label.
Second embodiment:
Second embodiment includes by that will sense and be detached in time come extension tag with the communication of RFID reader
The method of processing capacity.The system is made of one or more RFID readers and at least two transmitters.Sensing will be in label
Being launched the data completed when device " charging ", and sensed will be saved.Data can be read using standard RFID interface.
Compared with other RFID sensor-tag systems as described herein, the embodiment of this system with RFID reader without carrying out
Communication period provides additional-energy to execute sensing, and reason is:Sensing is in the difference with the communication of RFID reader
Between complete.In one embodiment, standard RFID protocol can be used to read the data sensed, and in another embodiment
In, using custom protocol, which is optimized for the large-scale array of reading and saving data.Implement at one
In example, as long as label is in energy bubble, so that it may to charge to label, and in another embodiment, via reversed
Scattering can be used to energy being directed to label RSSI value send and/or transmission.It is used in the context of the disclosure
Term " energy bubble " refer to such position, at this location by multiple transmitters (for example, 201,202 and 203) send out
The energy sent is noticeably greater than the energy around " bubble ", this is the frequency, phase and polarity by the energy beam transmitted by transmitter
Mutually long (constructive) of at least one of alignment influences caused.The physical space for this mutually long energy occur can
With the shape similar to bubble, but do not need to make limitation so.Similarly, term " bubble walking (bubble-
Walking) " referring to will by changing the energy beam control (including modification phase and/or polarity) of one or more transmitters
Energy bubble is moved to different positions.
The system that Fig. 5 shows the processing capacity for improving radio frequency identification (RFID) label, which includes for opening
The RFID reader (430) of the dynamic inquiry to RFID tag, for the memory element 415 on label charge and start feeling
The transmitter (401,402 and 403) and RFID sensor label (410) of survey.If checking the classification in Fig. 1 and Fig. 2, hair
Emitter (401-403) and RFID reader are the separation module only connected by software (112 and 116), the transmitter only company of transmission
Continuous wave is to give label (121) to power, and in one embodiment, there are the RSSI from RFID tag from receiver
It feeds back (132), and in another embodiment without feedback (131).Transmitter is in frequency (161) identical with RFID reader
Lower operation, or operated under different frequency (162).For example, transmitter with label be used for RFID reader into
Under the identical or different frequency of the capable frequency communicated energy beam is sent to label.In the example depicted in fig. 5, it is assumed that transmitter and
RFID reader all operates in identical frequency range.Memory element can be minimum (171), and this is because of no need of length
Temporally storage energy.In one embodiment, label sends RSSI value (181), Huo Zhe when giving energy by transmitter
In another embodiment, label does not send (183) RSSI value when giving energy by transmitter.Need the custom design for label
(193)。
Since RFID reader (430) and transmitter (401,402 and 403) in this example are in identical frequency range
Operation, therefore, the software run on computing unit 420 is responsible for implementing time-multiplexed.Due to reader and transmitter be with when
Between the mode that is multiplexed work, therefore, it is possible to use ready-made reader.
The present embodiment will sense and processing is detached with RFID communication.Energy bubble is focused on one by transmitter in a period of time
A position.After such time, energy bubble is focused onto the adjacent position in space, until entire space is all capped.
When label is charged (415) by transmitter (for example, when label is in energy bubble), sensing in unit 413 and
Processing is completed, and the data sensed are saved in the memory (412) of label.It has been irradiated including all in transmitter
After the entire space of the label of concern, RFID reader is opened to read the data sensed.Sensor on label and micro-
Controller (413) will close during RFID communication, this is because carrying out communication period with RFID reader, it may be without foot
Enough energy opens them.It is thereby achieved that read range be traditional passive label range, which is more than 10
Rice.Therefore, the present embodiment will not extend the range of (but reservation) current RFID system, at the same time be added to volume in the label
Outer processing capacity.This cannot be completed with traditional RFID sensor label, and reason is these traditional RFID sensings
Device label is designed to make sensor to need the energy from RFID reader to execute sensing, therefore read range is smaller.
Fig. 6 shows the example of the agreement corresponding to the system described in Fig. 5.Fig. 6 shows that transmitter and RFID are read
It is operated when device difference.The first step is related to charging (501) to all electronic tags in environment, or scanning includes wishing to read
Entire space (502) including the label taken.When label receives the energy from transmitter, label executes sensing, will sense
To information preservation in memory and update instruction goes out the semaphore (511) that new value is written into the memory of label.Work as reading
When taking label, RFID reader inquires each label respectively.After having read the ID of label, RFID reader sends one
Read command, to check the state (521) of the semaphore in memory.Label sends the memory location that the semaphore is saved
Content (512).If the value of the semaphore is " 1 ", reader sends another read command, is sent to sensing with request
The content (522) for the memory location that device data are preserved.Label reads the content and transmission data of memory location
(513).After this, label resets the value of the semaphore.Then, reader can continue to read another label (523).
In another embodiment, the value of the semaphore is " 0 " or some other values to indicate that it is subsequent that RFID reader should be sent
Read command.If reader discovery is not provided with the semaphore (for example, if label does not receive in a specific label
To enough energy, such case may can occur), then the software of higher level (for example is run on computing unit 420
Software) duration at the position of the specific label can be focused on energization bubble.
In another embodiment, transmitter and RFID reader will operate under different frequency ranges.It therefore, there is no need to
It is time-multiplexed.But label will have at least two antennas and two corresponding RF units.
3rd embodiment:
In the third embodiment, label is charged by transmitter, is then rapidly read by RFID reader.In this reality
Apply in example, energy bubble focuses on a place, then moves, one RFID of heel read sequence.In one embodiment,
Label is standard RFID tag.In another embodiment, when being irradiated by least one transmitter, tag backscatter its
RSSI value.Fig. 7 shows the sequence for realizing 3rd embodiment.
Fourth embodiment:
Fourth embodiment uses the bubble of the energy sent by transmitter to walk.First, the space around a transmitter
To energy only be given by the transmitter.The farther region of distance emitter will benefit from constructive interference.Energy bubble will be formed simultaneously
A period of time is kept at a position in space.In one embodiment, this will be in the position for not being directed to reference label
Completed in the case of any calibration.In various embodiments, using in many algorithms it is one or more come estimated energy
The position of bubble.In one embodiment, the position based on transmitter, known transmission frequency and phase and free space
Propagation model is assumed to estimate the position of bubble.In another embodiment, energy bubble is calibrated using reference label
Position.In various embodiments, reference label is placed on known location and provides RSSI value when being launched device irradiation.Right
After the position of energy bubble is calibrated, other positions can be estimated relative to reference label.
The system that Fig. 8 shows the range 704 for extended RFID sensor tag, the wherein system include for initiating
To the RFID reader (730) of the inquiry of RFID tag, is communicated with RFID reader and include memory element (such as super electricity
Container) (712) at least one RFID tag (710), energy can be directed to RFID tag and to ultracapacitor carry out
The controller (720) of the transmission of both the transmitter (701,702 and 703) of charging and control RFID reader and transmitter.
In addition, in various embodiments, system includes the reference label being placed at key point, to help energy being directed to these spies
It pinpoints (741 and 742).
With reference to the classification of figure 1 and Fig. 2, transmitter (701,702 and 703) and RFID reader (730) are only to pass through software
The different hardware unit of (112 and 116) connection, transmitter only sends continuous wave to power for label (121), and does not come from
The feedback (131) of RFID tag.However, if having used reference label, they will provide RSSI (133) to transmitter.
In various embodiments, transmitter operates (161) with RFID reader under identical frequency, or operates at different frequencies
(162), this is formd with example shown in fig. 7 (where it is assumed that two systems all operate in identical frequency range) pair
Than.Memory element at label needs larger (173).Label does not send RSSI when being irradiated by transmitter (183).Due to needing
Larger memory element, therefore, the custom design of label is essential (190).
Fig. 9 shows the agreement for reading RFID sensor label.Energy is focused on specific position several seconds by transmitter
Clock (801).If label is located exactly at the position, will be charged to its memory element (811).After this, hair is closed
Emitter simultaneously opens RFID reader.RFID reader inquires the label (821) in its read range.If the storage member of label
Part is electrically charged, then label can serve as semi-passive label and realize larger read range.Reader will read the ID of label.Such as
Fruit label is sensor tag, then label will execute sensing (812), the data (step 822 that then reader senses reading
With 813).Then, reader continues to inquire other labels (823).After other no labels make a response, transmitter is again
It opens, but energy is focused on different places more than 802 seconds by them now, and repeat whole process.
In one embodiment, using the reference label for being placed on known location.These labels can detect RSSI and will
RSSI value sends transmitter to.In this case, they can be used for focusing energy bubble.In other embodiments, passive
Sensor tag 710 is located in object or on object, which is at least generally in known location relative to reference label.Example
Such as, passive sensor label is located in the automobile on assembly line, and reference label is located at passive sensor label in assembly line and incites somebody to action
The specific location being read.This allows energy bubble to focus on the specific location on object or in object, without
For example RSSI is received from passive sensor label.
In another embodiment, transmitter and RFID reader are integrated in a system.In such a case, it is possible to
Use ready-made passive label.Energy bubble is focused on a place a period of time by transmitter, then one of transmitter
Reader will be served as.RFID reader will read the label in energy bubble, therefore the embodiment will realize bigger
Range.
Figure 10 is shown in which what RFID system was designed to operate with ready-made RFID reader and in same frequency band
The method of the embodiment of other wireless device coexistences.If (for example, passing through controller) detects certain energy in this band,
Then transmitter will be without sending.In this way, transmitter can be added in ready-made RFID deployment and multiple with the time
Mode works together with which.
Figure 11 shows the method to charge for remote RFID tag.At 1000, the first energy beam is directed to energy
Measure position.At 1002, the second energy beam is directed to energy position.In other embodiments, using more than two energy
Beam, wherein each energy beam is directed into energy position.Terms used herein " energy position " refer to due to the first energy beam
Constructive interference with the second energy beam and with the position of the energy density than peripheral region bigger.
At 1004, it is directed at the frequency and at least one of phase and polarity of each energy beam.In one example,
The frequency alignment of the frequency of first energy beam and the second energy beam, and the phase alignment of the first energy beam and the second energy beam.
Term " alignment " refers to the alignment at energy position.The frequency of " alignment " two corresponding energy beams means to make two energy beams
Frequency it is identical.The phase of " alignment " two corresponding energy beams means to keep the phase of two energy beams identical." alignment " two
The polarity of corresponding energy beam means to keep the polarity of two energy beams identical.At 1006, label is stored at energy position and connects
The energy (for example, being stored by charging to capacitor) of receipts.At 1008, tag senses sensing data.1010
Place, after a delay, reader is sent to by sensing data.
Although describing the present invention herein with reference to specific embodiment, illustrated as the following claims not departing from
The scope of the present invention in the case of, can be with various modifications and changes may be made.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive, and all such modifications are intended to be included within the scope of this invention.Herein in conjunction with specific embodiment
Described any benefit, advantage or issue-resolution are not intended to be interpreted the pass of any or all claim
Key, required or necessary feature or element.
Unless otherwise stated, the terms such as " first " and " second " are for arbitrarily distinguishing these term institutes
The element of description.Therefore, these terms are not necessarily intended to indicate the time order and function of these elements or other orders of priority.
Claims (20)
1. a kind of system for charging to remote radio frequency identification label, including:
First transmitter, the first transmitter are configured to the first energy beam being directed to energy position;
Second transmitter, the second transmitter are configured to the second energy beam being directed to the energy position, second hair
Emitter is physically separated with the first transmitter;
Label in the energy position, the label are configured to:Store the reception energy from the energy position, sensing
Sensing data, and be sent to the sensing data after the label is in the energy position certain period of time
Reader;And
Controller, the controller are configured to:In response to the equipment response of the label, by described the at the energy position
The first frequency of one energy beam is aligned with the second frequency of second energy beam, and by the first phase of first energy beam
One corresponding in the second phase and the second polarity of second energy beam of at least one of position and the first polarity is aligned,
To make the energy level at the energy position maximize.
2. system according to claim 1, wherein the reader is integrated with the first transmitter to utilize
First energy beam described in the antenna guide of the first transmitter and the reception sensing data.
3. system according to claim 1, wherein the reader is integrated with the first transmitter to utilize
The first antenna of the first transmitter guides first energy beam and receives the sensing data, and the second reader
With the second transmitter integrate with using the second transmitter the second antenna guide described in the second energy beam and
Receive the sensing data.
4. system according to claim 1, wherein equipment response is one of the following:Received signal strength indicator symbol,
And the amplitude for receiving energy from label transmit from the label using backscattering.
5. system according to claim 1, wherein the label further includes capacitor, the capacitor be configured in response to
The label receives the reception energy and is charged to operation voltage level, wherein the period is equal to the capacitor
It is charged to the charging time of the operation voltage level, the operation voltage level is supervised by being connected to the voltage of the capacitor
Survey what device measured.
6. system according to claim 5, wherein the label is configured to not be charged to the behaviour when the capacitor
Make to send the default content of the memory of the label when voltage level, and the label is configured to be filled in the capacitor
It is sensed after electricity to the operation voltage level and sends the sensing data.
7. system according to claim 6, wherein the default content of the memory includes one or more of following:
Indicate the value that clears data of the removing state of the memory, the semaphore for the uncharged state for indicating the capacitor, expression
The semaphore of sensing data whether has been sensed after being sent from last time, indicates the time for the time that the memory is eliminated
Timestamp value and the received signal strength indicator symbol for indicating the signal strength for receiving energy.
8. system according to claim 1, wherein the label is configured to:The reception energy is received in response to the label
Amount, senses the sensing data, the sensing data is stored in the memory of the label, and described in preservation
Setting signal amount after sensing data, and only just will be described when the semaphore is set and is inquired by the reader
Sensing data is sent to the reader, wherein the period is equal to the institute after the label is in the energy position
Label is stated the sensing time of the semaphore is arranged.
9. system according to claim 1, wherein the period is the fixed duration.
10. system according to claim 1, wherein the energy position is moved to new energy after the period
Position, and the energy position is determined based in part on multiple reference labels, each reference label send with it is corresponding
The corresponding correspondingly received signal strength indicator of signal strength of reception energy at reference label.
11. system according to claim 1, wherein the controller is configured to:Tool is detected in response to the controller
There is the background energy of the identical frequency at least one of first transmitter and second transmitter, deactivates corresponding first hair
Emitter or second transmitter.
12. a kind of method for charging to remote radio frequency identification label, including:
The first energy beam is directed to energy position by first transmitter;
By the second energy beam is directed to the energy position with the physically separated second transmitter of the first transmitter;
By label the reception energy from the energy position is stored in the energy position;
Using stored reception energy come sensing sensor data;
After the label is in the energy position certain period of time, utilize stored reception energy from the label to
Reader sends the sensing data;And
In response to the equipment response of the label, by controller in the energy position by the first of first energy beam the frequency
Rate is aligned with the second frequency of second energy beam, and will be in the first phase and the first polarity of first energy beam
At least one one corresponding in the second phase and the second polarity of second energy beam is aligned, to make the energy position
The energy level for setting place maximizes.
13. according to the method for claim 12, wherein determining the label according to received signal strength indicator symbol RSSI
Equipment responds, and the RSSI is the measured value of the reception energy at the label.
14. according to the method for claim 12, wherein the label transmits the equipment response using backscattering, and
Amplitude of the equipment response based on the reception energy at the label.
15. according to the method for claim 12, wherein it is described storage further include to be connected to the capacitor of the label into
Row charges to store the reception energy, and further includes:
The operation voltage level on the capacitor is measured to determine the amount for receiving energy, wherein
When the capacitor is not charged to the operation voltage level, the label sends the silent of the memory of the label
Recognize content, and
After the capacitor is charged to the operation voltage level, the tag senses simultaneously send the sensor number
According to.
16. according to the method for claim 12, further including:
The sensing data is preserved after sensing the sensing data;
In response to the sensing data preservation and setting signal amount;And
Only preserved sensor number is sent in response to the inquiry of the reader provided with the semaphore
According to.
17. further including according to the method for claim 12, determining the energy position, the ginseng according to multiple reference labels
It examines label and sends correspondingly received signal strength indicator corresponding with the reception signal strength of energy at corresponding reference label.
18. further including according to the method for claim 12, detecting to have and first transmitter in response to the controller
The background energy of identical frequency at least one of second transmitter deactivates corresponding first transmitter or the second transmitting
Device.
19. a kind of system for charging to remote radio frequency identification label, including:
Multiple physically separated transmitters, each transmitter are configured to corresponding energy beam being directed to energy position;
Label in the energy position, the label are configured to:Store the reception energy from the energy position, sensing
Sensing data, and by the sensor number after the capacitor for being connected to the label is charged to operation voltage level
According to reader is sent to, the capacitor is charged by the reception energy;And
Controller, the controller are configured to:In response to the equipment response of the label, for described at the energy position
Each transmitter in multiple transmitters, will be in the corresponding frequencies of each corresponding energy beam and respective phase and corresponding polarity
At least one alignment, to make the energy level at the energy position maximize.
20. system according to claim 19, wherein equipment response is one of the following:Received signal strength indicator
The amplitude for receiving energy from symbol, and the label that transmit from the label using backscattering.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662276285P | 2016-01-08 | 2016-01-08 | |
| US62/276,285 | 2016-01-08 | ||
| PCT/IB2017/000174 WO2017118914A1 (en) | 2016-01-08 | 2017-01-05 | Charging long-range radio frequency identification tags |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108702035A true CN108702035A (en) | 2018-10-23 |
Family
ID=59273551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780014998.2A Pending CN108702035A (en) | 2016-01-08 | 2017-01-05 | It charges to remote radio frequency identification label |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3400641A4 (en) |
| JP (1) | JP2019504600A (en) |
| KR (1) | KR20180103094A (en) |
| CN (1) | CN108702035A (en) |
| WO (1) | WO2017118914A1 (en) |
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| CN109831755A (en) * | 2019-03-22 | 2019-05-31 | 华南理工大学 | A kind of radio sensor network data collection method based on tunnel environment |
| WO2021017702A1 (en) * | 2019-07-29 | 2021-02-04 | 华为技术有限公司 | Signal transmission method and apparatus |
| WO2021163957A1 (en) * | 2020-02-20 | 2021-08-26 | Oppo广东移动通信有限公司 | Backscattering-based transmission methods, electronic device and storage medium |
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| US11995966B2 (en) | 2021-01-11 | 2024-05-28 | Nexite Ltd. | Systems and methods for verifying remote purchases |
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Also Published As
| Publication number | Publication date |
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| KR20180103094A (en) | 2018-09-18 |
| EP3400641A4 (en) | 2019-05-15 |
| JP2019504600A (en) | 2019-02-14 |
| EP3400641A1 (en) | 2018-11-14 |
| WO2017118914A1 (en) | 2017-07-13 |
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