CN114781412A - Multi-frequency holographic positioning method based on phase and storage cabinet capable of automatically identifying articles - Google Patents
Multi-frequency holographic positioning method based on phase and storage cabinet capable of automatically identifying articles Download PDFInfo
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
- G06K7/10089—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
- G06K7/10099—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse
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- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
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- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
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Abstract
The invention discloses a multi-frequency holographic positioning method based on phase and a storage cabinet capable of automatically identifying articles, wherein the method comprises the following steps: dividing a region to be positioned into x multiplied by y grids, calculating pixel values of all grids of the whole region to be positioned, and constructing a hologram reflecting pixel values of all grids of the region to be positioned; the antenna moves m positions, n frequencies are transmitted at each moving position, all grid pixel values reflecting an area to be positioned at the same position under different frequencies are superposed, and a hologram at each position is obtained; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag; and acquiring the severity of the multipath interference of the antenna at different positions, and setting corresponding weight to correct the actual position of the radio frequency tag when the hologram is generated according to the severity. The invention can automatically check and verify a plurality of storage boxes simultaneously and has high settlement efficiency and accuracy.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to a multi-frequency holographic positioning method based on phases and a storage cabinet capable of automatically identifying articles.
Background
Indoor positioning mainly includes positioning technologies based on infrared rays, ultrasonic waves, Bluetooth, RFID and the like. The RFID technology can realize the automatic identification function of the articles before the positioning of the articles, and can also realize the positioning function of the articles by utilizing the RFID technology. And the RFID technology is an indispensable technology in the Internet of things by virtue of the advantages of automatic identification, low cost, passive communication and the like, and provides important technical support for the connection of objects and things. The RFID system consists of a radio frequency tag, a reader-writer and a software system. The RFID reader-writer can communicate with the radio frequency tags in an electromagnetic field and can read and identify the radio frequency tags in an interrogation area. The passive RFID tag has been widely used in supply chain management and warehousing to realize automatic identification and tracking of objects by virtue of its advantages of low price, small size, non-contact communication, no need of manual operation in the identification process, capability of being used under severe conditions, and the like.
In the past, articles with radio frequency tags are placed in a storehouse equipment rack. The management aspect is that the model of the article equipment with the radio frequency tag and the quantity of the articles are manually registered and managed in the state of entering and exiting the warehouse, even if a manager uses a computer, the articles are only manually input and used, and basically the information of the received goods is manually confirmed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a multi-frequency holographic positioning method based on phase and a storage cabinet capable of automatically identifying articles, which organically combines the advanced RFID technology with storage management and replaces the original manual management operation, thereby being capable of simultaneously carrying out automatic checking and verification on a plurality of storage boxes in the storage cabinet.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the multi-frequency holographic positioning method based on the phase comprises the following steps:
s1, dividing the region to be positioned into x y grids, calculating pixel values of all grids of the whole region to be positioned, and constructing a hologram reflecting the pixel values of all grids of the region to be positioned;
s2, the antenna moves m positions, transmits n frequencies at each position, and superposes all grid pixel values reflecting the region to be positioned at the same position and under different frequencies to obtain a hologram at each position; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag;
s3, obtaining the severity of the multi-path interference of the antenna at different positions, and setting corresponding weight to correct the actual position of the radio frequency label when generating the hologram according to the severity.
Preferably, step S1 specifically includes the following step, assuming that the position coordinate of the radio frequency tag is (x)i,yj) The position coordinate of the antenna is (x)a,yb) When the rf tag is located at the assumed position, theoretically, the phase value of the rf tag read by the reader-writer is:
and (3) converting the similarity of the theoretical phase value calculated by each grid and the radio frequency tag phase value actually read by the reader-writer into the pixel value of the grid for representation, wherein the antenna is positioned at (x)a,yb) At the moment, any grid (x) in the area to be positionedi,yj) The pixel values at are:
wherein J represents an imaginary number, θTTo a theoretical phase value, thetatCalculating pixel values of all grids of the whole area to be positioned for the phase values actually read by the reader, and constructing a hologram H reflecting the pixel values of all grids of the positioning area:
preferably, step S2 specifically includes the following steps, moving the antenna by m positions, transmitting n frequencies at each moved position to construct a multi-frequency virtual antenna array, superimposing the holograms, and generating a grid with a maximum pixel value in the final hologram, which is the actual position of the radio frequency tag:
where l denotes the number of virtual antennas and c denotes the number of carrier channels.
Preferably, step S3 specifically includes the following step, assuming that the average phase value measured after the reader/writer reads the rf tag for multiple times under the c-th channel is as follows
The difference between the average phase values read for two channels of adjacent frequencies is:
a total of n channels, and therefore n-1 phase difference values, the similarity of the n-1 phase difference values at the antenna position obtained by using the entropy function is as follows:
wherein, Delta thetaiIn order to be the phase difference,
different weights are correspondingly set according to different similarities, and a specific calculation formula is as follows:
after introducing the weights, the calculation formula of the pixel values becomes:
a storage cabinet capable of automatically identifying articles comprises a storage cabinet, a plurality of storage boxes with radio frequency tags, a reader-writer and a man-machine interactive computer, wherein the storage boxes are arranged in the storage cabinet, the reader-writer and the man-machine interactive computer are matched with the radio frequency tags in a matching way,
the radio frequency tag is used for communicating with the reader-writer and recording related data information of the storage box to be positioned;
the antenna is used for moving m positions and transmitting n frequencies at each position of movement;
the reader-writer is used for acquiring radio frequency label information detected by different frequencies at each position of the antenna, and superposing all grid pixel values reflecting an area to be positioned at each position at different frequencies to acquire a hologram at each position; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag; the system is used for acquiring the severity of multipath interference of the antenna on each position, setting the weight corresponding to each position when the hologram is generated according to the severity to correct the actual position of the radio frequency tag, and sending the corrected position of the radio frequency tag to a human-computer interactive computer;
the man-machine interactive computer is used for issuing instructions to the reader-writer so as to control the reader-writer to acquire information; and the system is used for managing the articles according to the acquired related data information of the radio frequency tag.
Preferably, the radio frequency tag is a rewritable UHF radio frequency tag.
Preferably, the radio frequency tag is arranged on the storage box in a waterproof sealing mode or a fastening piece mode.
Preferably, the human-computer interactive computer is a touch screen computer.
Preferably, the human-computer interactive computer is arranged on the storage cabinet.
Based on the technical scheme, the invention has the beneficial effects that:
1) the multi-frequency virtual antenna array is used in the positioning method of the storage cabinet, the transmitting frequency of the antenna can be changed, more virtual antennas are created, and the higher the number of signals read at the same antenna position, the higher the holographic positioning precision;
2) the deployment position of the virtual antenna array is optimized, different weights are set when the hologram is generated by detecting the strength of multipath interference at different positions so as to reduce the influence of the multipath interference on the positioning error, and the positioning precision is further improved;
3) the invention organically combines the advanced RFID technology with the warehouse management and replaces the original manual management operation, thereby simultaneously carrying out automatic checking verification on a plurality of storage boxes on the storage cabinet, and greatly improving the calculation efficiency and accuracy compared with the original manual handling.
Drawings
FIG. 1 is a flow diagram of a method for multi-frequency phase-based holographic positioning in one embodiment;
FIG. 2 is a schematic diagram of antenna displacement in one embodiment;
FIG. 3 is a schematic diagram of phase value changes under multipath interference in one embodiment;
fig. 4 is a schematic structural diagram of a storage cabinet for automatically identifying articles in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, the present invention provides a multi-frequency holographic positioning method based on phase, which is applied to a storage cabinet for automatically identifying an article, and comprises the following steps:
s1, dividing the region to be positioned into x y grids, calculating the pixel values of all grids of the whole region to be positioned, and constructing the hologram reflecting the pixel values of all grids of the region to be positioned.
In this embodiment, before positioning the storage cabinet, a hologram is first constructed, an area to be positioned is divided into x × y grids, and each grid is considered to be a position where a tag to be positioned may be located. Assume that the position coordinates of the tag are (x)i,yj) The position coordinate of the antenna is (x)a,yb) If the tag is located at the assumed position, the phase value of the tag read by the reader theoretically is:
theoretical phase value theta calculated by comparisonTAnd the phase value theta actually read by the readertThe difference between the two, determines whether the assumed position is the actual position of the tag. If the assumed tag position and the actual tag position are not on the same grid, the calculated phase value and the actually read phase value have a phase difference of thetaT-θtL. the method is used for the preparation of the medicament. And the phase difference | θ is assumed to be the closer the position is to the actual position of the tagT-θtThe smaller the value of | is. Therefore, each grid can be sequentially assumed as a possible position of the tag, the theoretical phase value of the tag at the position is calculated, the difference between the theoretical phase value of each grid and the actually read phase value of the reader is compared, the smaller the difference is, the closer the actual position of the tag is to the grid, until the difference is obtained through comparison, the grid is the actual position of the tag, and the grid is the actual position of the tag.
Computing each gridThe similarity between the theoretical phase value of (a) and the actual read tag phase value of the reader is converted into the pixel value of the grid for representation. When the antenna is positioned at (x)a,yb) At the moment, any grid (x) in the area to be positionedi,yj) The pixel values at are:
wherein J represents an imaginary number, e is an exponent, θTIs a theoretical phase value, θtThe phase value actually read by the reader. The size of a grid pixel value indicates the likelihood that a label is located on the grid, and the larger the pixel value, the more likely it is that a label is located on the grid. Calculating pixel values of all grids of the whole to-be-positioned area, and constructing a hologram H reflecting the pixel values of all grids of the positioning area:
s2, moving the antenna by m positions, transmitting n frequencies at each moved position, and superposing all grid pixel values reflecting an area to be positioned at the same position under different frequencies to obtain a hologram at each position; and then overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag.
In this embodiment, a multi-frequency virtual antenna array is constructed. Due to the high cost of deploying multiple antennas, the present invention creates multiple virtual antennas through the movement of the antennas. As shown in fig. 2, at each antenna position, the pixel values of all the grids are calculated to generate a hologram. Assuming that the antenna moves m positions in total, and finally generating m holograms, overlapping the m holograms to finally generate a hologram:
the pixel value changes in [0, m ], the size of the pixel value represents the possibility that the label is positioned in the grid, after the hologram is superposed for many times, the pixel value of the grid where the label is positioned is continuously increased, and the grid with the maximum pixel value in all the grids is the actual position of the label. The more the number of times the hologram is superimposed, the more accurate the pixel value.
The invention provides a multi-frequency holographic positioning technology, which creates more virtual antennas by changing the transmitting frequency of each position antenna. Each time the antenna is moved to a position, it no longer transmits only a single frequency, but a plurality of frequencies. l denotes the number of virtual antennas and c denotes the number of carrier channels. Assuming that the antenna has a total of m positions, n frequencies are transmitted at each position. At each frequency, the reader collects phase values read for multiple times, averages the phase values as the measured phase values of the tag at the frequency, and substitutes the measured phase values into a pixel value calculation formula. And superposing the pixel values at different frequencies at the same position as superposition of a plurality of holograms generated by transmitting different frequencies by the antenna at the position. The antenna is calculated at each position according to the method, the holograms generated at each position are superposed, and the grid with the maximum pixel value in the generated hologram is the actual position of the label. The calculation formula is as follows:
s3, obtaining the severity of the multi-path interference of the antenna at different positions, and setting corresponding weight to correct the actual position of the radio frequency label when generating the hologram according to the severity.
In this embodiment, the deployment position of the virtual antenna array is optimized. Environmental interference can have certain influence on phase measurement, thereby influencing the positioning accuracy of the tag. Due to the existence of obstacles in the indoor environment, the electromagnetic wave signals received by the antenna are not necessarily direct path signals reflected from the tag, and may also be signals reflected from other objects such as walls, cabinets and the like. Multipath propagation is evident, and the phase value read by the RFID reader is a superposition of the phase values of the different signals on the multiple paths. In an indoor environment, multipath interference is serious, so that the positioning of the RFID tag is difficult to achieve high precision. The existence of the multipath effect cannot be avoided, but the deployment positions of the virtual antennas can be optimized to reduce the influence of the multipath effect on the positioning error due to different multipath interferences at different positions.
The invention adopts the virtual antenna array, and utilizes the antennas at different positions to transmit and receive electromagnetic waves, so the selection of the antenna position needs to be further improved to reduce the influence of multipath effect to the minimum. A virtual antenna array is constructed with antennas at different positions. Therefore, it is necessary to design a method for detecting the strength of multipath interference at a certain position, and select a position with less multipath interference to optimize the deployment position of the virtual antenna array. Antenna frequency of f1The phase value of the tag read by the reader is theta1The antenna frequency is f2The reader reads the tag phase value as theta2The following can be obtained:
wherein k is an integer and the speed of light c is 3 × 108m/s, f are the frequency of the electromagnetic wave. d is the distance between the tag and the reader antenna.
In the absence of multipath interference, the phase value will change linearly and regularly with the change in frequency. In a strong multipath environment, because an electromagnetic wave signal does not propagate along a direct path but is mixed with a lot of reflected signals, a phase value read by a reader is a vector superposition of phase values of a plurality of signals, and therefore the phase value varies irregularly along with the variation of frequency. As shown in fig. 3, the variation of the labels a and B in different positions.
The multipath interference strength at a certain position can be judged by analyzing the change condition of the phase value when the frequency changes, and then the antenna position with less multipath interference is selected for generating the hologram. Assuming that the antenna transmits n different frequencies in total, it is equivalentThere are n channels. The similarity of phase difference values between continuous channels needs to be compared, and an entropy function is introduced for calculation. Assuming that the average phase value measured after the reader reads the tag for a plurality of times under the c channel is
The difference between the average phase values read for two channels of adjacent frequencies is:
there are n channels in total, and thus n-1 phase difference values. By analyzing the similarity of the phase difference values read by each adjacent frequency when the antenna is at a certain position, whether the multipath interference at the antenna position is serious is judged according to the similarity. The similarity of n-1 phase difference values of the antenna position is obtained by using an entropy function as follows:
wherein, Delta thetaiFor the phase difference, the more similar the phase difference value is, the more similar elThe closer to 1, the smaller the multipath interference at the antenna location; on the contrary, if elThe closer to 0, the more serious the multipath interference is, and the great error will be introduced to the positioning result after the tag phase value read by the reader when the antenna is at the position is introduced into the pixel value calculation formula, so the phase value measured when the antenna is at the position should be discarded. The invention increases the proportion of the antenna used for generating the hologram at the position with less multipath interference by setting the weight; and conversely, the weight of the positioning result is reduced at the position with serious multipath interference, so that the influence of the multipath interference on the positioning result is minimized.
The weight function is set as:
after the weight function is introduced, the calculation formula of the pixel value becomes:
in one embodiment, a storage cabinet for automatically identifying objects is provided, as shown in fig. 4, which includes a storage cabinet, a plurality of storage boxes with rf tags disposed in the storage cabinet, and an antenna, a reader/writer and a human-computer interactive computer adapted to the rf tags, wherein,
the radio frequency tag is used for communicating with the reader-writer and recording related data information of the storage box to be positioned;
the antenna is used for moving m positions and transmitting n frequencies at each position of movement;
the reader-writer is used for acquiring radio frequency label information detected by different frequencies at each position of the antenna, and superposing all grid pixel values reflecting an area to be positioned at each position at different frequencies to acquire a hologram at each position; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag; the system is used for acquiring the severity of multipath interference of the antenna on each position, setting the weight corresponding to each position when the hologram is generated according to the severity to correct the actual position of the radio frequency tag, and sending the corrected position of the radio frequency tag to a human-computer interactive computer;
the man-machine interactive computer is a touch screen computer, is arranged on the storage cabinet and is used for issuing instructions to the reader-writer so as to control the reader-writer to acquire information; and the system is used for managing the articles according to the acquired related data information of the radio frequency tag.
In this embodiment, the radio frequency tag is a UHF radio frequency tag, and the state bit of the radio frequency tag when the radio frequency tag is stored or taken out is checked through a reader/writer corresponding to the storage cabinet. In this example, the radio frequency tag is fixedly mounted on the storage box body. The storage box is characterized in that the storage box is provided with a plurality of storage boxes, the storage boxes are provided with a plurality of storage boxes, and the storage boxes are provided with a plurality of storage boxes.
Be provided with face identification camera and fingerprint identification all-in-one on the apotheca, carry out face identification through face identification camera, carry out fingerprint identification through fingerprint identification all-in-one, then open the cabinet door of apotheca when face identification and/or fingerprint identification match after through, still be provided with bar code scanning head, surveillance camera head and computer audio amplifier etc. on the apotheca.
The above description is only a preferred embodiment of the multi-frequency holographic positioning method based on phase disclosed in the present invention, and is not intended to limit the scope of the embodiments of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present disclosure should be included in the protection scope of the embodiments of the present disclosure.
Claims (9)
1. The multi-frequency holographic positioning method based on the phase is characterized by comprising the following steps:
s1, dividing the region to be positioned into x y grids, calculating pixel values of all grids of the whole region to be positioned, and constructing a hologram reflecting the pixel values of all grids of the region to be positioned;
s2, moving the antenna by m positions, transmitting n frequencies at each moved position, and superposing all grid pixel values reflecting an area to be positioned at the same position under different frequencies to obtain a hologram at each position; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag;
s3, obtaining the severity of the multi-path interference of the antenna at different positions, and setting corresponding weight to correct the actual position of the radio frequency label when generating the hologram according to the severity.
2. The multi-frequency phase-based holographic positioning method of claim 1, wherein step S1 specifically comprises the step of assuming the location coordinates of the rf tag as (x)i,yj) The position coordinate of the antenna is (x)a,yb) When the rf tag is located at the assumed position, theoretically, the phase value of the rf tag read by the reader-writer is:
and converting the similarity between the theoretical phase value calculated by each grid and the radio frequency tag phase value actually read by the reader-writer into the pixel value of the grid for representation, wherein the antenna is positioned at (x)a,yb) At the moment, any grid (x) in the area to be positionedi,yj) The pixel value of (b) is:
wherein J represents an imaginary number, θTIs a theoretical phase value, θtCalculating pixel values of all grids of the whole area to be positioned for the phase value actually read by the reader, and constructing a hologram H reflecting the pixel values of all grids of the positioning area:
3. the phase-based multi-frequency holographic positioning method according to claim 2, wherein the step S2 specifically includes the following steps, the antenna moves m positions, n frequencies are transmitted at each position of the movement to construct a multi-frequency virtual antenna array, the holograms are overlapped, and the grid with the maximum pixel value in the generated final hologram is the actual position of the radio frequency tag:
where l denotes the number of virtual antennas and c denotes the number of carrier channels.
4. The multi-frequency phase-based multi-frequency holographic positioning method of claim 3, wherein the step S3 further comprises the step of assuming that the average phase value measured after the reader/writer reads the RF tag for a plurality of times under the c-th channel is equal to
The difference between the average phase values read for two channels of adjacent frequencies is:
a total of n channels, and therefore n-1 phase differences, are obtained, and the similarity of the n-1 phase differences at the antenna position is obtained by using the entropy function as follows:
wherein, Delta thetaiIn order to be the phase difference between the two,
different weights are correspondingly set according to different similarities, and a specific calculation formula is as follows:
after introducing the weights, the calculation formula of the pixel values becomes:
5. a storage cabinet capable of automatically identifying articles is characterized by comprising a storage cabinet, a plurality of storage boxes with radio frequency tags, a reader-writer and a man-machine interactive computer, wherein the storage boxes are arranged in the storage cabinet, the reader-writer is matched with the radio frequency tags in a direction, the man-machine interactive computer is connected with the reader-writer,
the radio frequency tag is used for communicating with the reader-writer and recording related data information of the storage box to be positioned;
the antenna is used for moving m positions and transmitting n frequencies at each position of movement;
the reader-writer is used for acquiring radio frequency label information detected by different frequencies at each position of the antenna, and superposing all grid pixel values reflecting an area to be positioned at each position at different frequencies to acquire a hologram at each position; then, overlapping the holograms generated at each position to generate a final hologram, wherein a grid with the maximum pixel value in the final hologram is the actual position of the radio frequency tag; the system is used for acquiring the severity of multipath interference of the antenna on each position, setting the weight corresponding to each position when the hologram is generated according to the severity to correct the actual position of the radio frequency tag, and sending the corrected position of the radio frequency tag to a human-computer interactive computer;
the man-machine interactive computer is used for issuing instructions to the reader-writer so as to control the reader-writer to acquire information; and the system is used for managing the articles according to the acquired related data information of the radio frequency tag.
6. The storage cabinet capable of automatically identifying articles as claimed in claim 5, wherein the radio frequency tag is a rewritable UHF radio frequency tag.
7. The storage cabinet for automatically identifying articles as claimed in claim 5 or 6, wherein the radio frequency tag is disposed on the storage box in a waterproof sealing manner or by a fastening means.
8. The storage cabinet capable of automatically identifying articles as claimed in claim 5, wherein the human-computer interaction computer is a touch screen computer.
9. The storage cabinet for automatically identifying articles as claimed in claim 5 or 8, wherein the human-computer interaction computer is disposed on the storage cabinet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210194145.4A CN114781412A (en) | 2022-03-01 | 2022-03-01 | Multi-frequency holographic positioning method based on phase and storage cabinet capable of automatically identifying articles |
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| CN202210194145.4A CN114781412A (en) | 2022-03-01 | 2022-03-01 | Multi-frequency holographic positioning method based on phase and storage cabinet capable of automatically identifying articles |
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