CN110674656A - Radio frequency identification reader and method of use - Google Patents
Radio frequency identification reader and method of use Download PDFInfo
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- CN110674656A CN110674656A CN201910879283.4A CN201910879283A CN110674656A CN 110674656 A CN110674656 A CN 110674656A CN 201910879283 A CN201910879283 A CN 201910879283A CN 110674656 A CN110674656 A CN 110674656A
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- 230000005855 radiation Effects 0.000 claims abstract description 89
- 238000001514 detection method Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 description 12
- 101100108293 Caenorhabditis elegans aex-4 gene Proteins 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013523 data management Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10881—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
Abstract
The invention provides a radio frequency identification reader, which is characterized by comprising: the directional antenna module is used for directionally transmitting or receiving signals; the laser module is used for aiming at an object to be identified; the radio frequency identification reader is provided with a first working mode and a second working mode, wherein in the first working mode, the directional antenna module transmits or receives signals at a first radiation angle, the laser module generates a first aiming pattern, in the second working mode, the directional antenna module transmits or receives signals at a second radiation angle, and the laser module generates a second aiming pattern; wherein: the first radiation angle is greater than the second radiation angle, the first aiming pattern to indicate a range of the first radiation angle, the second aiming pattern to indicate a range of the second radiation angle.
Description
Technical Field
The present invention relates to a radio frequency identification reader and a method for using the same, and more particularly, to a radio frequency identification reader with adjustable radiation angle and a method for using the same.
Background art:
radio Frequency Identification (RFID) is one of automatic Identification technologies, and performs contactless bidirectional data communication in a Radio Frequency manner, and reads and writes a recording medium (an electronic tag or a Radio Frequency card) in a Radio Frequency manner, thereby achieving the purposes of identifying a target and exchanging data. A complete set of RFID system, it is made up of Reader writer (Reader), electronic label (Tag) and data management system, its working principle is that the Reader writer (Reader) transmits a radio wave energy of the particular frequency, in order to drive the circuit and send out the internal data, the Reader just receives and deciphers the data in order at this moment, send to the data management system and do the corresponding processing. The RFID technology relies on electromagnetic waves, and does not need to connect physical contact of both parties, even the RFID reader of a high frequency band can simultaneously identify and read the contents of a plurality of tags, so that the radio frequency identification technology is more and more widely applied.
However, since the electromagnetic wave for radio frequency identification is invisible, the reader/writer has blindness in reading the tag, and the user does not know at all which position the tag is read. And no matter how far the article to be checked is, the antenna of the reader-writer adopts the same radiation angle to identify the label, if the radiation angle is too small when identifying and reading the article in a short distance, part of the label is omitted and is not identified and read, and if the radiation angle is too large when identifying and reading the article in a long distance, the power consumption is too high, which causes waste.
The present invention addresses the above problems by providing a new radio frequency identification reader and method of use thereof, employing new methods and technical means to solve these problems.
Disclosure of Invention
In view of the problems faced by the background art, the present invention is directed to a radio frequency identification reader with adjustable radiation angle and a method for using the same.
In order to achieve the purpose, the invention adopts the following technical means:
the invention provides a radio frequency identification reader, which is characterized by comprising: the directional antenna module is used for directionally transmitting or receiving signals; the laser module is used for aiming at an object to be identified; the radio frequency identification reader is provided with a first working mode and a second working mode, wherein in the first working mode, the directional antenna module transmits or receives signals at a first radiation angle, the laser module generates a first aiming pattern, in the second working mode, the directional antenna module transmits or receives signals at a second radiation angle, and the laser module generates a second aiming pattern; wherein: the first radiation angle is greater than the second radiation angle, the first aiming pattern to indicate a range of the first radiation angle, the second aiming pattern to indicate a range of the second radiation angle.
Optionally, a control button is included to trigger the rfid reader to switch between a first operating mode and a second operating mode.
Optionally, the projection directions of the first aiming pattern and the second aiming pattern are both arranged coaxially with or parallel to the maximum receiving direction of the directional antenna module.
Optionally, the directional antenna module comprises a control unit and a distance detection module, the distance detection module is configured to detect a distance from an object to be identified to the radio frequency identification reader, the control unit is configured to control the radio frequency identification reader to operate in a first operating mode when the distance from the object to be identified is smaller than a threshold value, and control the directional antenna module to operate in a second operating mode when the distance from the object to be identified is larger than the threshold value.
Optionally, the size of the first aiming pattern is larger than the size of the second aiming pattern at the same distance.
Optionally, the first aiming pattern and the second aiming pattern are elliptical or circular.
Optionally, the directional antenna is both a transmit antenna and a receive antenna.
The invention provides a using method of a radio frequency identification reader, which is characterized by comprising the following steps: the method comprises the following steps: a first aiming pattern is emitted through a laser module to aim at a first area to be read, when the first aiming pattern only aims at the first area through adjustment, the second step is carried out, otherwise, the third step is carried out; step two: transmitting or receiving signals at a first radiation angle by a directional antenna module, wherein the first radiation angle matches an aiming range of the first aiming pattern; step three: and aiming the first area by the laser module to emit a second aiming pattern, wherein the aiming range of the second aiming pattern is different from that of the first aiming pattern.
Optionally, the aiming range of the second aiming pattern is smaller than that of the first aiming pattern, and after the third step, the method further comprises: transmitting or receiving signals through the directional antenna module at a second radiation angle that matches the aiming range of the second aiming pattern.
Optionally, the rfid reader further includes a control button, and before or during the third step, the control button is switched to enable the laser module to emit the second aiming pattern.
Compared with the prior art, the invention has the following beneficial effects:
the radio frequency identification reader is provided with a first working mode and a second working mode, wherein in the first working mode, the directional antenna module transmits or receives signals at a first radiation angle, the laser module generates a first aiming pattern, in the second working mode, the directional antenna module transmits or receives signals at a second radiation angle, and the laser module generates a second aiming pattern; wherein: the first radiation angle is greater than the second radiation angle, the first aiming pattern to indicate a range of the first radiation angle, the second aiming pattern to indicate a range of the second radiation angle. The user can select an appropriate radiation angle according to the size and distance of an article to be read, and whether the selected radiation angle is appropriate can be distinguished by the recognizable first aiming pattern and the recognizable second aiming pattern.
Drawings
FIG. 1 is a schematic diagram of one embodiment of an RFID reader of the present invention, illustrating the RFID reader's aiming at an item to be identified by an aiming pattern;
FIG. 2 is a block diagram of the RFID reader of FIG. 1;
FIG. 3 is a schematic view of an RFID reader according to an embodiment of the present invention, reading an object to be identified by different radiation angles, and indicating different ranges of radiation angles by different aiming patterns;
FIG. 4 is a schematic diagram of a radio frequency identification reader in an embodiment of the present invention in which a directional antenna transmits signals at different radiation angles and a laser module indicates the range of different radiation angles with different aiming patterns;
FIG. 5 is a block diagram of another embodiment of an RFID reader of the present invention;
FIG. 6 is a flow chart of a method of use of one embodiment of the radio frequency identification reader of the present invention;
FIG. 7 is a flow chart of a method of using another embodiment of the RFID reader of the present invention.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
Detailed Description
For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.
As shown in fig. 1 and 2, the rfid reader 100 of the present invention mainly includes a directional antenna module 1, a laser module 2, a trigger button 3, a control unit 4, and a display screen 5.
As shown in fig. 3 and 4, the directional antenna module 1 is designed to transmit or receive signals through a plurality of radiation angles (referred to as horizontal radiation angles) with different sizes, and the reception ranges a, a' of the directional antenna module 1 on the vertical planes at different distances along the maximum radiation direction X are all precisely measured to be a known shape, which can be adjusted to a regular shape, such as a circle or an ellipse, by a certain technical means according to needs. The power of the directional antenna module 1 is the same when transmitting signals through different radiation angles, and the maximum radiation direction X is also the same. The directional antenna module 1 may be an antenna with adjustable radiation angle, such as an array antenna or a combined antenna, and is preferably a phased array antenna, so as to achieve precise control of the radiation angle of the directional antenna module 1. The directional antenna module 1 is configured to transmit or receive signals at least through a first radiation angle θ and a second radiation angle θ ', the first radiation angle θ is larger than the second radiation angle θ', and since the power of the directional antenna module 1 transmitting signals through the first radiation angle θ and the second radiation angle θ 'is the same, the signals transmitted by the directional antenna module 1 at the first radiation angle θ can cover a larger area at near while the signals transmitted at the second radiation angle θ' can cover a larger area at far. In this embodiment, the directional antenna module 1 is both a transmitting antenna and a receiving antenna; in other embodiments, the directional antenna module 1 may be only a receiving antenna, so that a transmitting antenna may be additionally provided.
With continued reference to fig. 4, the laser module 2 includes a laser emitter 21 and an optical element 22, the optical element 22 may be a suitable optical device such as a special-shaped lens or a diffractive optical element 22, preferably a diffractive optical element 22, so that the visible laser emitted by the laser emitter 21 passes through the optical element 22 to generate an aiming pattern with a desired shape, and the projection direction of the aiming pattern generated by the laser module 2 is coaxially or parallel to the maximum radiation direction X (or the maximum receiving direction) of the directional antenna module 1, so that at a certain distance from the rfid reader 100, the aiming pattern generated by the laser module 2 substantially coincides with the receiving range a of the directional antenna module 1. And since the reception range a, a 'of the directional antenna module 1 changes with increasing distance, the optical element 22 is designed such that the size of the aiming pattern changes with increasing distance in synchronism with the reception range a, a' of the directional antenna module 1, so that the aiming pattern always remains approximately coincident with the reception range a, a 'of the directional antenna module 1 at different distances, by means of which the reception range a, a' of the directional antenna module 1 at different distances can be accurately indicated.
Furthermore, the laser module 2 can generate at least two aiming patterns, that is, the laser module 2 can generate at least a first aiming pattern P and a second aiming pattern P ', the first aiming pattern P is used for indicating the range of the first radiation angle θ, the second aiming pattern P' is used for indicating the range of the second radiation angle θ ', and the projection directions of the first aiming pattern P and the second aiming pattern P' are coaxially arranged with or parallel to the maximum receiving direction of the directional antenna module 1. Since the reception range a, a 'of the directional antenna module 1 is generally circular or elliptical, the first aiming pattern P and the second aiming pattern P' may also be circular or elliptical; at the same distance, the size of the first aiming pattern P is larger than the size of the second aiming pattern P'. In this embodiment, the laser emitter 21 emits laser lights with different wavelengths to form different aiming patterns by diffracting through the same optical element 22, such as the first aiming pattern P by a red laser and the second aiming pattern P' by a blue laser. In other embodiments (not shown, the same applies below), the laser module 2 may include two laser emitters 21, and the laser emitted by the two laser emitters 21 respectively generate the first aiming pattern P and the second aiming pattern P' via the optical element 22; or two of said laser emitters 21 cooperate with two of said optical elements 22 to generate said first aiming pattern P and said second aiming pattern P', respectively. In other embodiments, the laser emitter 21 can cooperate with two of the optical elements 22 to generate the first aiming pattern P and the second aiming pattern P', respectively; or the optical element 22 comprises two different diffractive zones by which the laser transmitter 21 generates the first aiming pattern P and the second aiming pattern P', respectively. In other embodiments, the laser module 2 can generate more than two aiming patterns.
The trigger button 3 is electrically connected to the control unit 4, and is used for controlling the laser module 2 to emit aiming patterns and controlling the directional antenna module 1 to emit or receive signals through the control unit 4.
In one embodiment, the rfid reader 100 is configured to have at least two operating modes, namely, the rfid reader 100 has at least a first operating mode in which the directional antenna module 1 transmits or receives signals at a first radiation angle θ and the laser module 2 generates a first aiming pattern P, and a second operating mode in which the directional antenna module 1 transmits or receives signals at a second radiation angle θ 'and the laser module 2 generates a second aiming pattern P'. As shown in fig. 2, in this embodiment, the rfid reader 100 further has at least one control key 7, where the control key 7 is used to trigger the rfid reader 100 to switch between a first operating mode and a second operating mode, that is, when the user observes that the first aiming pattern P exceeds the area of the object 8 to be identified and selects another object beside the object, the user can manually trigger the control key 7 to switch the rfid reader 100 to the second operating mode; on the contrary, when the area of the object 8 to be identified is large, it is time-consuming and labor-consuming to aim and traverse the area of the object 8 to be identified through the second aiming pattern P', and the user can manually trigger the control key 7 to switch the rfid reader 100 to the first operating mode. Of course, the rfid reader 100 may be configured with more operation modes according to the requirement, and in different operation modes, the radiation angles of the directional antenna module 1 are different in size, and the aiming patterns corresponding to the radiation angles of different sizes are also different. In this embodiment, the rfid reader 100 may further display the read information of the object 8 to be identified through the display screen 5.
In this embodiment, the user is required to manually switch the working mode of the rfid reader 100, which consumes energy; in other embodiments (not shown, the same applies below), the rfid reader 100 may further include a distance detection module 9, the distance detection module 9 is configured to detect a distance from the object 8 to be identified to the rfid reader 100, and the control unit 4 is configured to control the rfid reader 100 to operate in the first operation mode when the distance from the object 8 to be identified is smaller than a threshold value, and control the directional antenna module 1 to operate in the second operation mode when the distance from the object 8 to be identified to the rfid reader 100 is larger than the threshold value. The distance detection module 9 may be a laser distance measurement sensor, an infrared distance sensor, an ultrasonic distance sensor, or the like.
As shown in fig. 5, in another embodiment, after the distance detection module 9 detects the distance of the object 8 to be identified, the distance information of the object 8 to be identified is fed back to the control unit 4, and the control unit 4 automatically adjusts the radiation angle of the directional antenna module 1 according to the distance information, so that the radiation angle of the directional antenna module 1 matches the distance from the object 8 to be identified to the rfid reader 100. Since the farther the same article is away from the reader 100, the smaller the occupied viewing angle is, and the closer the same article is away from the reader, the farther the article 8 to be identified is from the reader 100, the smaller the radiation angle is required by the directional antenna module 1 to make the transmitted radio frequency signal cover the area where the article 8 to be identified is located, so as to read one or more electronic tags 81 on the article 8 to be identified; when the distance between the object 8 to be identified is short, the directional antenna module 1 needs a larger radiation angle to cover the area where the object 8 to be identified is located, so as to read the one or more electronic tags 81 on the object 8 to be identified without omission. The method is also suitable for reading the articles on a standard shelf (a shelf with the same size) or reading the articles with the same size in a pile, the visual angles occupied by different articles 8 to be identified at the same distance are basically the same, a fixed functional relationship can be established between the radiation angle of the directional antenna module 1 and the distance of the articles 8 to be identified, when the control unit 4 obtains the distance information of the articles 8 to be identified, the functional relationship can be called, the radiation angle of the directional antenna module 1 can be quickly adjusted to be proper, and the aiming pattern emitted by the laser module 2 can be quickly adjusted to be matched with the current radiation angle. In this embodiment, the radiation angle of the directional antenna module 1 is automatically adjusted by the control unit 4 to match with the distance of the object 8 to be identified, so that the method is more intelligent. In this embodiment, the aiming pattern can be emitted by the laser module 2 to aim at the object 8 to be identified; in this embodiment, the rfid reader 100 may further include a camera 6 for capturing an image of the object 8 to be identified, a display area 51 may be disposed on the display screen 5 to assist the user in aiming at the object 8 to be identified, the display area 51 is substantially overlapped with the receiving range a of the directional antenna, so that the display area 51 may indicate the horizontal radiation angle and the vertical radiation angle of the directional antenna, and the display area 51 is preferably a display frame for the user to select the object 8 to be identified. In other embodiments, the laser module 2 or the display area 51 may not be provided.
As shown in fig. 6, which is a flow chart of a method for using the rfid reader 100 according to an embodiment of the present invention, the method includes the following steps:
s1: the distance from the article 8 to be identified to the rfid reader 100 is detected by the distance detection module 9.
The user triggers the distance detection module 9 to detect the distance by pressing the trigger button 3.
The rfid reader 100 may further include a laser module 2, and in step S1, the user may simultaneously trigger the laser module 2 to emit an aiming pattern to aim at the object 8 to be identified by pressing the trigger button 3, where the aiming range of the aiming pattern substantially coincides with the receiving range a of the directional antenna module 1, so as to prompt the user of the area where the electronic tag 81 that can be read by the rfid reader 100 is located.
The distance detection module 9 further feeds back distance information of the object 8 to be identified to the control unit 4.
S2: the radiation angle of the directional antenna module 1 is adjusted by the control unit 4, so that the radiation angle of the directional antenna module 1 is matched with the distance from the object 8 to be identified to the radio frequency identification reader 100.
The radiation angle of the directional antenna module 1 is inversely related to the distance from the object 8 to be identified to the rfid reader 100. Since the farther the same article is away from the reader 100, the smaller the occupied viewing angle is, and the closer the same article is away from the reader, the farther the article 8 to be identified is from the reader 100, the smaller the radiation angle is required by the directional antenna module 1 to make the transmitted radio frequency signal cover the area where the article 8 to be identified is located, so as to read one or more electronic tags 81 on the article 8 to be identified; when the distance between the object 8 to be identified is short, the directional antenna module 1 needs a larger radiation angle to cover the area where the object 8 to be identified is located, so as to read the one or more electronic tags 81 on the object 8 to be identified without omission.
S3: the directional antenna module 1 transmits radio frequency signals towards the object 8 to be identified and receives signals fed back by the electronic tag 81 on the object 8 to be identified or directly receives signals transmitted by the electronic tag 81 on the object 8 to be identified.
Taking a passive tag as an example, after the laser module 2 transmits the aiming pattern for a certain time, the control unit 4 controls the directional antenna module 1 to transmit a radio frequency signal to an area framed by the aiming pattern, so as to activate the electronic tag 81 in the framed area, so that the electronic tag 81 feeds back the signal to the radio frequency identification reader 100 and is received by the directional antenna module 1, and the control unit 4 further decodes the signal fed back by the electronic tag 81 and displays the decoded information on the display screen 5.
If the electronic tag 81 is an active tag, after the laser module 2 transmits the aiming pattern for a certain time, the control unit 4 controls the directional antenna module 1 to receive the signal transmitted by the electronic tag 81 in the selected area of the aiming pattern frame, and the control unit 4 further decodes the signal fed back by the electronic tag 81 and displays the decoded information on the display screen 5. Semi-active tags are similar.
As shown in fig. 7, which is a flow chart of a method for using the rfid reader 100 according to another embodiment of the present invention, the method includes the following steps:
s10: the first aiming pattern P is shot by the laser module 2 to aim at a first area to be read, when the first aiming pattern P only aims at the first area through adjustment, S20 is carried out, otherwise, S30 is carried out;
s20: transmitting or receiving signals at a first radiation angle θ by the directional antenna module 1, wherein the first radiation angle θ matches an aiming range of the first aiming pattern P;
s30: the first area is aimed by the laser module 2 emitting a second aiming pattern P' having an aiming range different from that of the first aiming pattern P.
The aiming range of the second aiming pattern P' is smaller than that of the first aiming pattern P, further comprising, after S30: the signal is transmitted or received by the directional antenna module 1 at a second radiation angle θ ', which matches the aiming range of the second aiming pattern P'.
The rfid reader 100 further includes a control button 7, and before S30 or in S30, the user can switch the control button 7 to make the laser module 2 emit the second aiming pattern P'.
The radio frequency identification reader and the using method thereof have the following beneficial effects:
1. the rfid reader 100 has a first operating mode in which the directional antenna module 1 transmits or receives signals at a first radiation angle θ and the laser module 2 generates a first aiming pattern P, and a second operating mode in which the directional antenna module 1 transmits or receives signals at a second radiation angle θ 'and the laser module 2 generates a second aiming pattern P'; wherein: the first irradiation angle theta is greater than the second irradiation angle theta ', the first aiming pattern P to indicate a range of the first irradiation angle theta, the second aiming pattern P ' to indicate a range of the second irradiation angle theta '. The user can select an appropriate radiation angle according to the size and distance of an article to be read, and whether the selected radiation angle is appropriate can be distinguished by the recognizable first aiming pattern P and the second aiming pattern P'.
2. The distance detection module 9 is configured to detect a distance from the object 8 to be identified to the rfid reader 100, and feed back distance information of the object 8 to be identified to the control unit 4, and the control unit 4 automatically adjusts the radiation angle of the directional antenna module 1 according to the distance information, so that the radiation angle of the directional antenna module 1 matches with the distance from the object 8 to be identified to the rfid reader 100. When a short-distance article is read, the radiation angle of the directional antenna can be increased so as to cover a wider range and prevent a part of tags from being missed during reading; when a remote object is identified and read, the radiation angle of the directional antenna can be reduced, and the power consumption can be reduced; the whole process is automatically completed by the distance detection module 9 in cooperation with the control unit 4, and is more intelligent.
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.
Claims (10)
1. A radio frequency identification reader, comprising:
the directional antenna module is used for directionally transmitting or receiving signals;
the laser module is used for aiming at an object to be identified;
the radio frequency identification reader is provided with a first working mode and a second working mode, wherein in the first working mode, the directional antenna module transmits or receives signals at a first radiation angle, the laser module generates a first aiming pattern, in the second working mode, the directional antenna module transmits or receives signals at a second radiation angle, and the laser module generates a second aiming pattern; wherein:
the first radiation angle is greater than the second radiation angle, the first aiming pattern to indicate a range of the first radiation angle, the second aiming pattern to indicate a range of the second radiation angle.
2. The radio frequency identification reader of claim 1, wherein: the radio frequency identification reader comprises a control key used for triggering the radio frequency identification reader to switch between a first working mode and a second working mode.
3. The radio frequency identification reader of claim 1, wherein: the projection directions of the first aiming pattern and the second aiming pattern are coaxially arranged or parallel to the maximum receiving direction of the directional antenna module.
4. The radio frequency identification reader of claim 1, wherein: the distance detection module is used for detecting the distance from an object to be identified to the radio frequency identification reader, the control unit is used for controlling the radio frequency identification reader to work in a first working mode when the distance from the object to be identified is smaller than a threshold value, and controlling the directional antenna module to work in a second working mode when the distance from the object to be identified is larger than the threshold value.
5. The radio frequency identification reader of claim 1, wherein: the size of the first aiming pattern is larger than the size of the second aiming pattern at the same distance.
6. The radio frequency identification reader of claim 1, wherein: the first aiming pattern and the second aiming pattern are oval or circular.
7. The radio frequency identification reader of claim 1, wherein: the directional antennas are both transmit and receive antennas.
8. A method for using a radio frequency identification reader is characterized by comprising the following steps:
the method comprises the following steps: a first aiming pattern is emitted through a laser module to aim at a first area to be read, when the first aiming pattern only aims at the first area through adjustment, the second step is carried out, otherwise, the third step is carried out;
step two: transmitting or receiving signals at a first radiation angle by a directional antenna module, wherein the first radiation angle matches an aiming range of the first aiming pattern;
step three: and aiming the first area by the laser module to emit a second aiming pattern, wherein the aiming range of the second aiming pattern is different from that of the first aiming pattern.
9. The method of using a radio frequency identification reader as claimed in claim 8, wherein: the second aiming pattern has an aiming range smaller than that of the first aiming pattern, and after the third step, the method further comprises: transmitting or receiving signals through the directional antenna module at a second radiation angle that matches the aiming range of the second aiming pattern.
10. The method of using a radio frequency identification reader as claimed in claim 8, wherein: and the radio frequency identification reader also comprises a control key, and before or in the third step, the control key is used for switching to enable the laser module to emit a second aiming pattern.
Priority Applications (1)
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