16 results about "Uhf antennas" patented technology

The invention relates to the technical field of archive management, and discloses an RFID archive management positioning device which comprises a frame body, a layer plate, a controller, an electronic door lock, a touch operation screen, an RF read-write module, an ultrahigh frequency RF antenna, a position indicator light belt, universal wheels, a camera, a glass door and a sensing assembly. Wherein the shelf board is located in the rack body and used for placing file bags or file boxes, the ultrahigh frequency RF antennas are distributed at the positions perpendicular to the shelf board and parallel to the glass door, the position indicator light belt is installed on the shelf board, and the touch operation screen is installed on the glass door. According to the invention, accurate positioning in a high-density scene is realized through cross-type ultrahigh-frequency antenna layout and an optimized positioning algorithm, the algorithm eliminates environmental interference through RSSI signal strength normalization processing, reduces response time delay error through a multipoint sampling average value method, and combines a trilateration principle with multiple groups of antenna data, so that the positioning accuracy is improved. And the positioning error can be controlled within the range of + / -1 file.

The utility model discloses a copper wire sewing thread antenna ultrahigh frequency clothes washing label which comprises label cloth, a double-ring type radio frequency resonant cavity assembly, an ultrahigh frequency antenna sewn by a copper wire sewing thread and a common sewing thread sewing thread, the label cloth comprises an upper layer and a lower layer, and the double-ring type radio frequency resonant cavity assembly is installed in the two layers of label cloth. The ultrahigh frequency antenna sewn by the copper wire sewing thread is sewn on the label cloth, the ultrahigh frequency antenna sewn by the copper wire sewing thread is used for being coupled with the double-ring type radio frequency resonant cavity assembly to form a radio frequency label with an antenna wing, and the common sewing thread sewing thread is sewn on the label cloth. The clothes washing label is low in raw material and manufacturing cost, rapid and stable in installation, beneficial to prolonging the service life of the clothes washing label, beneficial to popularization and application in the low-profit clothes washing industry and the low-profit linen industry, capable of promoting informatization management, reducing personnel and cost, increasing benefits and free of errors.

The present invention relates to the technical field of ultra-high frequency radio frequency antennas. Disclosed are a copper wire sewing thread ultra-high frequency antenna material and a method for manufacturing an ultra-high frequency antenna by using a sewing machine. The copper wire sewing thread ultra-high frequency antenna comprises a copper wire sewing thread formed by twisting a bare copper wire and a sewing thread, and the copper wire sewing thread is sewn on a tag fabric substrate, so as to form the copper wire sewing thread ultra-high frequency antenna. The manufacturing method comprises the steps of performing twisting to form a copper wire sewing thread, determining a sewing type, determining a sewing stitch trajectory, a sewing stitch pitch and a sewing length, sewing the copper wire sewing thread onto a tag fabric substrate, etc. The copper wire sewing thread ultra-high frequency antenna of the present invention has good electrical conductivity, a small diameter, high tensile strength and good flexibility; the ultra-high frequency antenna is manufactured by means of a high-speed sewing machine on the basis of a fabric material, thus offering advantages of resistance to washing, resistance to folding and pressing, resistance to ironing, as well as high manufacturing efficiency; and the manufacturing cost thereof is low, facilitating wide application of radio frequency technology in the footware and apparel industry, linen industry and bag industry, thereby improving the level of information-based management.

The invention relates to a method for testing the thickness of an RFID tag using a coupled antenna structure and application thereof, and the method comprises the following steps: 1), respectively arranging an ultrahigh-frequency antenna and a metal loop at the two sides of the thickness of a thickness test object, and forming the RFID tag of the coupled antenna structure; (2) an RFID reader-writer is adopted to transmit ultrahigh-frequency electromagnetic waves with specific frequency to read information of the RFID tag of the coupled antenna structure; 3) obtaining the maximum reading distance of the RFID tag of the coupled antenna structure under a specific frequency; 4) for thickness test objects which are made of the same material and have different thicknesses, respectively obtaining corresponding maximum reading distances; 5) acquiring a linear relation curve of the thickness of the thickness test object and the maximum reading distance of the RFID tag of the coupled antenna structure, and 6) acquiring the thickness of the thickness test object corresponding to the maximum reading distance measured by the RFID reader-writer from the linear relation curve in the step 5). According to the method, the RFID tag of the coupled antenna structure can play a role of a thickness measuring sensor.

In some embodiments, a radio frequency identification (RFID) system may include at least one Ultra High Frequency (UHF) antenna component, a conductive loop having a largest dimension that is smaller than the wavelength of radiation transmitted at a Microwave Frequency (MW). The conductive loop may define a gap and an RFID chip may be electrically coupled to the conductive loop. The conductive loop may be configured to be resonant at an Ultra High Frequency (UHF) and less resonant at Microwave Frequency (MW). The antenna component may be selected from the group consisting of a dipole antenna, a monopole antenna, a loop antenna, or a slot antenna.

The invention provides a double-frequency electronic identifier, and aims to solve the problems that an existing identifier is unstable in performance, single in function and insufficient in safety in a complex environment, and metal and non-metal surface applications are difficult to consider at the same time. The dual-frequency chip is arranged on the substrate, and a high-frequency communication module, an ultrahigh-frequency communication module and a storage area for common access of the high-frequency communication module and the ultrahigh-frequency communication module are integrated in the dual-frequency chip; the high-frequency antenna is arranged on the substrate and is electrically connected with the high-frequency communication module of the dual-frequency chip; the ultrahigh frequency antenna is arranged on the substrate and is electrically connected with the ultrahigh frequency communication module of the dual-frequency chip; and the shell covers the substrate, the dual-frequency chip, the high-frequency antenna and the ultrahigh-frequency antenna.

The invention discloses a GIS partial discharge monitoring and early warning method and device based on multi-antenna cancellation and multi-mode fusion, and the method comprises the steps: collecting GIS partial discharge original signals through N groups of external ultrahigh frequency antennas, inhibiting multi-source interference through combining a noise template windowing translation method, and outputting pure partial discharge signals; the method comprises the following steps: synchronously acquiring multi-mode data of bus voltage and current, cleaning the data by adopting a sliding window + linear interpolation + 3 sigma criterion, and extracting time domain and frequency domain features; multi-modal features are fused based on an attention mechanism, a lightweight CNN-LSTM model is input to realize partial discharge trend prediction and grading early warning, and model precision is optimized through a cross entropy loss function; and transmitting an early warning result to a digital platform, and after early warning is triggered, carrying out iterative optimization on model parameters according to an on-site maintenance verification result. According to the method, the extraction rate of partial discharge signals in a complex electromagnetic environment can reach more than 90%, the processing delay is less than or equal to 1ms, the early warning accuracy is improved by 10% +, and the method is suitable for external monitoring of 500kV-1000kV extra-high voltage GIS equipment.

The application relates to the technical field of file management, and discloses an RFID file management positioning device which comprises a frame body, a layer plate, a controller, an electronic door lock, a touch operation screen, an RF read-write module, an ultra-high frequency RF antenna, a position indicating lamp strip, a universal wheel, a camera, a glass door and a sensing assembly; the layer plate is arranged in the frame body and used for placing file bags or file boxes; the ultra-high frequency RF antenna is arranged at a position perpendicular to the layer plate and parallel to the glass door; the position indicating lamp strip is arranged on the layer plate; and the touch operation screen is arranged on the glass door. The application realizes accurate positioning in a high-density scene through a cross-type ultra-high frequency antenna layout and an optimized positioning algorithm; the algorithm eliminates environmental interference through RSSI signal strength normalization processing, reduces response time delay error through a multi-point sampling average value method, and combines the principle of trilateration with multi-group antenna data, so that the positioning error can be controlled within a range of 1 file.

The utility model relates to the technical field of automation, in particular to a double-frequency book returning machine for a library, which comprises a frame body, an ultrahigh-frequency antenna and a double-frequency antenna box, a book returning channel is arranged in the frame body, a book returning opening is formed on one side of the frame body by the book returning channel, and the ultrahigh-frequency antenna and the double-frequency antenna box are arranged in the frame body. The book returning channel is provided with fluency strips on the other face opposite to the frame body, the ultrahigh frequency antenna is arranged on the top of the book returning channel, and the double-frequency antenna box is arranged at the bottom of the book returning channel. The ultrahigh-frequency antenna at the top and the ultrahigh-frequency antenna in the double-frequency antenna box at the bottom read ultrahigh-frequency tags of books at the same time, reading results are mutually verified, misreading caused by overflow of the ultrahigh-frequency antennas is reduced, meanwhile, the high-frequency antennas in the double-frequency antenna box read high-frequency RFID tags of the books, and the reading efficiency is improved. Therefore, the technical problem that in the prior art, a traditional book returning machine cannot identify high-frequency and ultrahigh-frequency label books at the same time is solved.

The utility model discloses an ultrahigh frequency RFID identification system, comprising a planar antenna array, a power division phase shift network and an ultrahigh frequency reader-writer module, the planar antenna array comprises a plurality of ultrahigh frequency antenna groups, and the plurality of ultrahigh frequency antenna groups are placed in a coplanar manner; and the power division phase shift network is respectively connected with the ultrahigh frequency antenna group and the ultrahigh frequency reader-writer module. The ultrahigh frequency antenna group comprises a plurality of linearly arranged antenna array elements and an independent feed structure, and the feed power ratio is 1: 1-8: 1. The planar antenna array is adopted to replace a traditional single-antenna system or a multi-antenna system, accurate control over the radiation boundary of the ultrahigh-frequency RFID recognition system and beam scanning in the specific direction are achieved through distribution of the feed amplitude and phase of the planar antenna array, and therefore the probability of serial reading and missed reading is reduced, and robustness in the RFID recognition process is improved.

The invention discloses an intelligent checking vehicle control system and checking method for a stereoscopic warehouse, and the system comprises a four-direction moving chassis, a data processing and transmission module, a power supply and battery management module, and an ultrahigh frequency RFID recognition system. The ultrahigh-frequency RFID identification system comprises an antenna array consisting of four groups of ultrahigh-frequency antennas of which the angles can be independently adjusted, and an RFID reader-writer connected with the antenna array; the four-way mobile chassis is in communication connection with a path planning and navigation module, and the path planning and navigation module plans a driving path for the four-way mobile chassis based on a pre-established warehouse digital twin model and sensor data; a charging contact of the autonomous charging module is arranged on the four-direction moving chassis; the data processing and transmission module is in communication connection with the ultrahigh frequency RFID identification system, the path planning and navigation module and the autonomous charging module; and the power supply and battery management module supplies power to the system. The problems that in the prior art, efficiency is low, recognition is limited, and algorithm adaptability is poor are solved.

The invention relates to a channel type read-write device supporting multi-protocol label mixed inventory and a control method, a main channel door and an auxiliary channel door of the device are oppositely arranged at an interval to form a passage channel for objects with labels, and the main channel door and the auxiliary channel door realize signal and data interaction through a cable; the main channel door comprises a control module, a read-write module, a first infrared sensor, an audible and visual alarm, a first group of ultrahigh frequency antennas and a power supply module, and the auxiliary channel door comprises a second infrared sensor, an audible and visual alarm and a second group of ultrahigh frequency antennas. The read-write module is a multi-protocol identification core and is composed of a protocol processing unit, an interface unit and a radio frequency unit. The control module comprises a processor and a multi-interface extension hardware circuit integrated with serial and network interfaces, and the problems of protocol incompatibility, data congestion, antenna interference, low module collaboration efficiency and the like of multi-protocol label checking are accurately solved through interface extension and time sequence coordination of a hardware level, efficient transmission of multi-protocol identification data and collaboration of modules of a main channel gate and an auxiliary channel gate.

The utility model discloses a copper wire sewing thread ultrahigh frequency antenna material in the technical field of ultrahigh frequency radio frequency antennas, a copper wire sewing thread ultrahigh frequency antenna comprises a copper wire sewing thread, the copper wire sewing thread is formed by twisting a bare copper wire and a sewing thread, and the copper wire sewing thread is sewn on a label cloth base material to form the copper wire sewing thread ultrahigh frequency antenna. The copper wire sewing thread ultrahigh frequency antenna has the advantages of being good in conductivity, small in diameter, large in tensile strength, good in flexibility, capable of being sewn on a cloth material through a high-speed sewing machine, resistant to washing, folding and pressing, resistant to ironing and high in manufacturing efficiency, low in manufacturing cost, and suitable for popularization and application. Wide application of radio frequency technologies in the shoe industry, the linen industry and the handbag industry is promoted, and the informatization management level is improved.

The utility model discloses a carbon brush ignition monitoring integrated dust hood, which belongs to the technical field of motor excitation, and comprises a dust hood sleeved on a collector ring, the dust hood is provided with an ultrahigh frequency antenna and a window, the ultrahigh frequency antenna is used for measuring ultrahigh frequency electromagnetic wave signals in the ignition process of a carbon brush, and the ultrahigh frequency antenna is connected with a detection circuit through an SMA (Shape Memory Alloy) interface. According to the utility model, the ultrahigh frequency antenna is arranged on the dust collection cover, so that the ignition and discharge of the carbon brush can be monitored, two functions of restraining carbon powder and monitoring the ignition of the carbon brush are realized, and meanwhile, the embedded design is adopted, so that the integrity and the aesthetic property are better. The adopted carbon brush ignition monitoring mode can achieve monitoring of tiny carbon brush ignition, compared with an existing ultraviolet arc light probe and other means, the carbon brush ignition monitoring device has the advantages of being not blocked, wide in measurement range, high in sensitivity and the like, and large-range carbon brush ignition monitoring can be achieved more easily.

The dual-mode radio frequency identification (RFID) device is provided with an integrated dual-mode radio frequency identification connecting band, and the integrated dual-mode radio frequency identification connecting band comprises an ultrahigh frequency / high frequency (UHF / HF) dual-mode radio frequency identification chip or a combination of an ultrahigh frequency radio frequency identification chip and a high frequency radio frequency identification chip. A high frequency (HF) antenna and an ultrahigh frequency (UHF) antenna are both coupled to the integrated dual-mode radio frequency identification connection band, the ultrahigh frequency antenna is formed by methods other than etching, such as cutting or printing operations, thereby reducing the cost of manufacturing the device. If a pair of chips is employed, one of the pair of chips may have a greater thickness than the other, which enables the thicker chip to be integrated into the device after the thinner chip without the need for a minimum spacing between the two chips that is set due to the size of the hot electrode used to fix the chips. Further, the first chip may be tested prior to securing the second chip, thereby limiting the cost of abandoned devices.

This utility model discloses a dual-frequency tag, relating to the field of RFID electronic tag technology. The dual-frequency tag includes: an antenna substrate; an antenna body comprising a high-frequency section and an ultra-high-frequency section. The high-frequency section includes a loop circuit and a high-frequency chip. The loop circuit is arranged circumferentially around the high-frequency chip to form a loop structure. The ultra-high-frequency section includes a circuit and an ultra-high-frequency chip, forming a U-shaped structure; a tag face material, which is adhered to the antenna body; and an adhesive layer, which is disposed on one side of the antenna substrate, with an area equal to that of the antenna substrate. This utility model, by simultaneously mounting an ultra-high-frequency antenna and a high-frequency antenna on the same antenna substrate, enables the RFID chip to simultaneously operate at two frequency bands, improving production efficiency and material utilization, shortening the production cycle, and reducing production costs. Furthermore, the adhesive layer adhered to the other side of the antenna substrate allows for quick installation by bonding the dual-frequency tag to the surface of an object, expanding its application scenarios.