CN111029720A - RFID antenna radiation performance reinforcing device - Google Patents
RFID antenna radiation performance reinforcing device Download PDFInfo
- Publication number
- CN111029720A CN111029720A CN201911197736.1A CN201911197736A CN111029720A CN 111029720 A CN111029720 A CN 111029720A CN 201911197736 A CN201911197736 A CN 201911197736A CN 111029720 A CN111029720 A CN 111029720A
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- supporting plate
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- radiation
- bearing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The invention relates to a device for strengthening the radiation performance of an RFID antenna, which comprises: the low-radiation brushless motor and the mechanism control module are fixed in parallel in a motor shielding cover on the lower surface of the mechanism bracket; the driving cam arm is fixed on the output shaft of the low-radiation brushless motor through a transmission pin; the inner ring of the driving bearing is fixed in an inner hole of the driving cam arm by a pressing sleeve, the outer ring of the bearing can freely rotate and is embedded into the supporting plate groove frame, the groove width on the supporting plate groove frame is slightly larger than the outer diameter of the driving bearing, and the driving bearing can rotate and roll in the groove of the supporting plate groove frame; the supporting plate groove frame is fixed with the antenna supporting plate; the RFDI antenna is fixed on the antenna supporting plate; the supporting plate shaft is fixed on the central plane of the antenna supporting plate, the inner ring of the supporting plate bearing is sleeved on the supporting plate shaft and is fixed by the shaft retainer ring, and the inner ring of the supporting plate bearing is embedded into the inner hole of the supporting seat; the supporting seat is fixed on the upper surface of the mechanism bracket.
Description
Technical Field
The invention belongs to the field of RFID antenna electromagnetic radiation uniform fields of an RFID reading and identifying system of the Internet of things, and particularly relates to an electromechanical module system for enhancing the radiation range of an RFID antenna.
Background
The technology of the internet of things is another information industry revolution after computers, the internet and mobile communication, and the RFID technology is one of the supporting technologies of the internet of things industry, so that the internet of things technology has great vitality due to the fact that the RFID technology is carried on the internet of things. At present, the RFID industry develops rapidly, and RFID systems are widely applied to the fields of warehouse management, management of valuables, confidential articles, dangerous chemicals, securities, archives and books, production lines, traffic, unmanned supermarkets and the like.
However, the existing RFID antenna still has great disadvantages, the size and the sensing distance of the RFID antenna are difficult to be coordinated, and the construction cost, the reading range and the reading accuracy of the RFID system are difficult to be coordinated.
Due to the miniaturization of the antenna, the size of the antenna is reduced, the coverage area of the RFID reader system is reduced, and the accuracy is reduced. After the volume of the antenna is increased, the radiation intensity of the antenna is not uniform, so that the problem of label missing reading is caused. To increase the radiation range of the reader antenna, more readers and RFID antennas may be deployed in the reading area, however the cost of the overall system also increases. By improving the sensitivity of the reader, the transceiver module of the RFID reader can receive a weaker tag signal or expand the reading range of the RFID system by reducing the power consumption of the tag, improving the sensitivity and forward power of the tag circuit, and other measures, and thus a new chip needs to be developed, which is difficult to meet the urgent application requirements. Other approaches, such as multi-antenna polling, phased array antennas and RFID antennas with shuttles, can solve some of the problems of the application, but they also have certain limitations, such as: the problem of high cost due to the limited number of direction angles of the multi-antenna and the phased-array antenna; the radiation range of the RFID antenna which can only increase along the one-way axis reciprocating motion by additionally arranging the reciprocating mechanism on the RFID antenna is limited, and the reciprocating mechanism needs larger space to meet the problems of the mechanism stroke, the volume of an RFID antenna module is increased, and the like.
Disclosure of Invention
The present invention is directed to a device for enhancing radiation performance of an RFID antenna, which is used to solve the above-mentioned problems of the prior art.
The invention relates to a device for strengthening the radiation performance of an RFID antenna, which comprises: the antenna comprises an RFDI antenna (1), an antenna supporting plate (2), a supporting plate groove frame (3), a supporting plate shaft (4), a supporting plate bearing (5), a supporting seat (6), a driving bearing (7), a driving cam arm (8), a low-radiation brushless motor (10), a motor shielding cover (11), a mechanism control module (12) and a mechanism bracket (13); the low-radiation brushless motor (10) and the mechanism control module (12) are fixed in parallel in a motor shielding cover (11) on the lower surface of the mechanism bracket (13); the driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin; the inner ring of the driving bearing (7) is fixed in the inner hole of the driving cam arm (8) by a pressing sleeve, the outer ring of the bearing can freely rotate and is embedded into the supporting plate groove frame (3), the groove width on the supporting plate groove frame (3) is slightly larger than the outer diameter of the driving bearing (7), and the driving bearing (7) can rotate and roll in the groove of the supporting plate groove frame (3); the supporting plate groove frame (3) is fixed with the antenna supporting plate (2); the RFDI antenna (1) is fixed on the antenna supporting plate (2); the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2), the inner ring of the supporting plate bearing (5) is sleeved on the supporting plate shaft (4) and is fixed by a shaft check ring, and the inner ring of the supporting plate bearing (5) is embedded into the inner hole of the supporting seat (6); the supporting seat (6) is fixed on the upper surface of the mechanism bracket (13).
An embodiment of the device for enhancing radiation performance of an RFID antenna according to the present invention further includes: the support column (14) is intended to be fixed in the mechanism carrier (13) in the module base (15).
According to an embodiment of the device for enhancing radiation performance of the RFID antenna, the module cover plate (16) is used for covering the module base (15).
According to an embodiment of the device for enhancing the radiation performance of the RFID antenna, the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13), is connected with the low-radiation brushless motor (10) through a communication cable, controls the low-radiation brushless motor (10) to be synchronous with the working time of the RFID antenna (1), and moves according to the preset time and the preset rotating speed.
According to one embodiment of the device for enhancing the radiation performance of the RFID antenna, the driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin and rotates synchronously.
According to an embodiment of the device for enhancing the radiation performance of the RFID antenna, the driving bearing (7) revolves for one circle to drive the supporting plate slot frame (3) to swing back and forth for one period.
According to an embodiment of the device for enhancing radiation performance of the RFID antenna, the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13).
According to one embodiment of the device for enhancing the radiation performance of the RFID antenna, the motor shielding cover (11) is fixed on the lower surface of the mechanism bracket (13) by screws.
According to one embodiment of the device for enhancing the radiation performance of the RFID antenna, the supporting plate slot frame (3) is fixed with the antenna supporting plate (2) by a screw connecting piece.
According to one embodiment of the device for enhancing the radiation performance of the RFID antenna, the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2) through a countersunk head screw.
The invention integrates the RFID antenna, the rotary swing mechanism and the control system together to manufacture the RFID antenna radiation strengthening device, the RFID antenna is made to swing back and forth through the rotary swing mechanism, the radiation range of the RFID antenna is enlarged, the field intensity of a space to be read is increased, the coverage range and the reading accuracy of the RFID reader system are greatly improved, a shielding device is designed for the control module and the low-radiation brushless motor, and components which are easy to become electromagnetic interference sources, such as a sensor, a relay, a proximity switch and the like, are adopted, so that a good electromagnetic environment is provided for the RFID antenna, and the system performance of the RFID reader in a closed narrow limited space is particularly improved. The module has the advantages of simple structure, less parts, higher reliability and lower cost.
Drawings
FIG. 1 is a schematic diagram of an RFID antenna radiation performance enhancement device;
FIG. 2 is a view of the external view of FIG. 1 with the cover plate removed;
FIG. 3 is a cross-sectional view of an RFID antenna radiation performance enhancing apparatus;
FIG. 4 is a schematic diagram of an internal structure of an RFID antenna radiation performance enhancement device;
fig. 5 is another cross-sectional view of an RFID antenna radiation performance enhancing apparatus.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Fig. 1 is an outline view of an RFID antenna radiation performance enhancing apparatus, fig. 2 is a state view of the outline view shown in fig. 1 with a module cover hidden, fig. 3 is a cross-sectional view of the RFID antenna radiation performance enhancing apparatus, which is a schematic view of the inside of the RFID antenna radiation performance enhancing apparatus, and fig. 5 is a cross-sectional view of the other side of the RFID antenna radiation performance enhancing apparatus, as shown in fig. 1 to 5, the RFID antenna radiation performance enhancing apparatus of the present invention includes: RFDI antenna (1), antenna layer board (2), layer board cell-rack (3), layer board axle (4), layer board bearing (5), supporting seat (6), initiative bearing (7), initiative cam arm (8), motor shaft (9), low-radiation brushless motor (10), motor shield cover (11), mechanism control module (12), mechanism bracket (13), support column (14), module base (15), spare parts and subassembly such as module apron (16) constitute.
As shown in fig. 1 to 5, the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13), and can be connected with the low-radiation brushless motor (10) through a communication cable; the low-radiation brushless motor (10) and the mechanism control module (12) are fixed in parallel in a motor shielding cover (11) on the lower surface of the mechanism bracket (13), and the motor shielding cover (11) is fixed on the lower surface of the mechanism bracket (13) by screws; the driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin; the inner ring of the driving bearing (7) is fixed in the inner hole of the driving cam arm (8) by a pressing sleeve, the outer ring of the bearing can freely rotate and is embedded into the supporting plate groove frame (3), the groove width on the supporting plate groove frame (3) is slightly larger than the outer diameter of the driving bearing (7), and the driving bearing (7) can rotate and roll in the groove; the supporting plate groove frame (3) is fixed with the antenna supporting plate (2) by a screw connecting piece; the RFDI antenna (1) is fixed on the antenna supporting plate (2) by a screw connector; the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2) through a countersunk screw, the inner ring of the supporting plate bearing (5) is sleeved on the supporting plate shaft (4) and is fixed by a shaft retainer ring, and the inner ring of the supporting plate bearing (5) is embedded into the inner hole of the supporting seat (6); the supporting seat (6) is fixed on the upper surface of the mechanism bracket (13); the above parts fixed on the mechanism bracket (13) form a mechanism assembly and are fixed in the module base (15) by screws and supporting columns (14); the module cover plate (16) covers and is fixed on the module base (15) through screws to form a complete RFID antenna radiation performance strengthening device.
The mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13), can be connected with the low-radiation brushless motor (10) through a communication cable and controls the working time synchronization of the low-radiation brushless motor (10) and the RFID antenna (1), and moves according to the set time and the set rotating speed. The driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin and rotates synchronously with the output shaft. An inner ring of the driving bearing (7) is fixed in an inner hole of the driving cam arm (8) by a pressing sleeve, an outer ring of the bearing can rotate freely and is embedded into the supporting plate groove frame (3), the driving bearing (7) rotates and revolves in the groove under the driving of the driving cam arm (8), and the driving bearing (7) revolves for one circle to drive the supporting plate groove frame (3) to swing for one period in a reciprocating mode. The supporting plate groove frame (3) is fixed with the antenna supporting plate (2) by a screw connecting piece; the RFDI antenna (1) is fixed on the antenna supporting plate (2) by a screw connector; the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2) through a countersunk screw, the inner ring of the supporting plate bearing (5) is sleeved on the supporting plate shaft (4) and is fixed by a shaft retainer ring, and the inner ring of the supporting plate bearing (5) is embedded into the inner hole of the supporting seat (6); the support seat (6) is fixed on the upper surface of the mechanism bracket (13), and the RFDI antenna (1) is driven by the antenna supporting plate (2) to swing in a reciprocating way. The above parts fixed on the mechanism bracket (13) form a mechanism assembly and are fixed in the module base (15) by screws and supporting columns (14); the module cover plate (16) covers and is fixed on the module base (15) through screws to form a complete RFID antenna radiation performance strengthening device.
When the RFID antenna radiation performance strengthening device works normally, the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13), and can be connected with the low-radiation brushless motor (10) through a communication cable and control the low-radiation brushless motor (10) to move according to set time and rotating speed. The driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin and rotates synchronously with the output shaft. An inner ring of the driving bearing (7) is fixed in an inner hole of the driving cam arm (8) by a pressing sleeve, an outer ring of the bearing can rotate freely and is embedded into the supporting plate groove frame (3), the driving bearing (7) rotates and revolves in the groove under the driving of the driving cam arm (8), and the driving bearing (7) revolves for one circle to drive the supporting plate groove frame (3) to swing for one period in a reciprocating mode. The supporting plate groove frame (3) is fixed with the antenna supporting plate (2) by a screw connecting piece; the RFDI antenna (1) is fixed on the antenna supporting plate (2) by a screw connector; the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2) through a countersunk screw, the inner ring of the supporting plate bearing (5) is sleeved on the supporting plate shaft (4) and is fixed by a shaft retainer ring, and the inner ring of the supporting plate bearing (5) is embedded into the inner hole of the supporting seat (6); the support seat (6) is fixed on the upper surface of the mechanism bracket (13), and the RFDI antenna (1) is driven by the antenna supporting plate (2) to swing in a reciprocating way. The above parts fixed on the mechanism bracket (13) form a mechanism assembly and are fixed in the module base (15) by screws and supporting columns (14); the module cover plate (16) covers and is fixed on the module base (15) through screws to form a complete RFID antenna radiation performance strengthening device.
The RFID antenna radiation performance strengthening device has the following characteristics:
a shielding device is designed for a control module and a low-radiation brushless motor, and components which are easy to become electromagnetic interference sources such as a sensor, a relay and a proximity switch are omitted, so that a good electromagnetic environment is provided for an RFID antenna.
The method applies the design principle of three types (modularization, generalization and serialization), has high assembly, debugging, installation and use efficiency, and can be matched with various Internet of things identification devices.
The control is simple, complex control module hardware and programming are not needed, and the control is synchronous with the working time of the RFID antenna; the structure is succinct, spare part is small in quantity, and the reliability is higher, and the cost is lower.
The method and the device realize real-time identification of the objects or targets stored in the closed narrow limited space range, and have high identification speed and accuracy.
The invention provides a device for strengthening the radiation performance of an RFID antenna, aiming at the defects of low read-write efficiency and low read accuracy of an RFID reader in the prior art and analyzing the problem that the fundamental reason is the uniformity and coverage area of an electromagnetic field radiated by the RFID antenna. The reading speed and the reading accuracy of the RFID system are improved. The invention provides a device for strengthening the radiation performance of an RFID antenna, which realizes real-time identification of articles or targets stored in a closed narrow limited space range, further realizes on-site detection of the articles or targets and tag information statistics and improves the reading efficiency and accuracy. Compared with the prior art, the invention realizes the quick inventory of mixed storage of various articles, has convenient use and high efficiency and solves the problems of reading efficiency and accuracy. Compared with the existing antenna mechanism of the RFID system, the antenna mechanism of the RFID system has the advantages that the problem of identification accuracy of article management in a closed narrow limited space range is solved, and the time, the identification quantity, the reading range and the identification accuracy of multiple articles are greatly improved. Therefore, the invention plays an important role in warehouse management and intelligent carrier cabinets.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An RFID antenna radiation performance enhancement device, comprising: the antenna comprises an RFDI antenna (1), an antenna supporting plate (2), a supporting plate groove frame (3), a supporting plate shaft (4), a supporting plate bearing (5), a supporting seat (6), a driving bearing (7), a driving cam arm (8), a low-radiation brushless motor (10), a motor shielding cover (11), a mechanism control module (12) and a mechanism bracket (13);
the low-radiation brushless motor (10) and the mechanism control module (12) are fixed in parallel in a motor shielding cover (11) on the lower surface of the mechanism bracket (13); the driving cam arm (8) is fixed on an output shaft of the low-radiation brushless motor (10) through a transmission pin; the inner ring of the driving bearing (7) is fixed in the inner hole of the driving cam arm (8) by a pressing sleeve, the outer ring of the bearing can freely rotate and is embedded into the supporting plate groove frame (3), the groove width on the supporting plate groove frame (3) is slightly larger than the outer diameter of the driving bearing (7), and the driving bearing (7) can rotate and roll in the groove of the supporting plate groove frame (3); the supporting plate groove frame (3) is fixed with the antenna supporting plate (2); the RFDI antenna (1) is fixed on the antenna supporting plate (2); the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2), the inner ring of the supporting plate bearing (5) is sleeved on the supporting plate shaft (4) and is fixed by a shaft check ring, and the inner ring of the supporting plate bearing (5) is embedded into the inner hole of the supporting seat (6); the supporting seat (6) is fixed on the upper surface of the mechanism bracket (13).
2. The RFID antenna radiation performance enhancing apparatus of claim 1, further comprising: the support column (14) is intended to be fixed in the mechanism carrier (13) in the module base (15).
3. The RFID antenna radiation performance enhancing apparatus according to claim 1, wherein the module cover (16) is used to cover the module base (15).
4. The RFID antenna radiation performance enhancing apparatus according to claim 1, wherein the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13), connected to the low-radiation brushless motor (10) through a communication cable, and controls the low-radiation brushless motor (10) to move at a predetermined time and rotation speed in synchronization with the operation time of the RFID antenna (1).
5. The RFID antenna radiation performance enhancing apparatus according to claim 1, wherein the driving cam arm (8) is fixed to the output shaft of the low-radiation brushless motor (10) by a driving pin and rotates synchronously.
6. The device for enhancing the radiation performance of the RFID antenna according to claim 1, wherein the driving bearing (7) revolves for one circle to drive the pallet trough frame (3) to swing back and forth for one period.
7. The device for enhancing the radiation performance of an RFID antenna according to claim 1, wherein the mechanism control module (12) is fixed on the lower surface of the mechanism bracket (13).
8. The device for enhancing the radiation performance of an RFID antenna according to claim 1, wherein the motor shield (11) is fixed to the lower surface of the mechanism bracket (13) by screws.
9. The device for enhancing the radiation performance of the RFID antenna according to claim 1, wherein the tray slot frame (3) is fixed with the antenna tray (2) by a screw connection.
10. The device for enhancing the radiation performance of the RFID antenna according to claim 1, wherein the supporting plate shaft (4) is fixed on the central plane of the antenna supporting plate (2) through a countersunk head screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911197736.1A CN111029720B (en) | 2019-11-29 | 2019-11-29 | RFID antenna radiation performance reinforcing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197736.1A CN111029720B (en) | 2019-11-29 | 2019-11-29 | RFID antenna radiation performance reinforcing device |
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| CN111029720A true CN111029720A (en) | 2020-04-17 |
| CN111029720B CN111029720B (en) | 2021-06-08 |
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