22 results about "Reading distance" patented technology

The utility model discloses a label reads distance measuring device, including measuring box, a plurality of background board, clamping assembly and label fixed platform, and label fixed platform is located at the front end of measuring box, and the locating slot for label positioning installation is set up on label fixed platform, the lateral surface of measuring box is set up and forms a plurality of card embedding groove, and each background board is made of different material, and is installed in each card embedding groove respectively, clamping assembly includes spring and clamping block, and the bottom wall of each card embedding groove is set up and has the accommodation groove, and the spring is set up in the accommodation groove, and clamping block is under the action of spring and is worn to in the card embedding groove, and the one end of clamping block is set up as inclined plane to the outside of measuring box, and the bottom of each background board near card embedding groove end wall one side is set up and forms the limit slot, and clamping block can be embedded in the limit slot of background board bottom end. The utility model has the advantages of the measuring device when carrying out label reads distance measurement, need not to hold background board, and the manpower cost is smaller, and can ensure the accuracy of measurement data more.

This utility model belongs to the field of electronic tag technology and discloses an RFID electronic tag with an anti-tamper structure. It includes a brittle base, an antenna layer on the surface of the brittle base, a tag chip connected to the antenna layer, and multiple breakpoints with a width of 0.01m on the antenna layer. A top cover layer is provided on the surface of the antenna layer, and an adhesive layer for attaching to an object is provided at the bottom of the brittle base. The bottom of the top cover layer is coated with a fine and continuous conductive ink line to form a grid-like detection circuit. In this utility model, the detection circuit is weakly coupled to the antenna in the antenna layer, forming a parasitic capacitance. This causes a significant shift in the antenna's resonant frequency, preventing the energy emitted by the reader at its operating frequency from being effectively received by the tag antenna. This results in a sharp decrease in the tag's reading distance, or even complete unreadable data, thus achieving the anti-tamper function.

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.

The utility model relates to a radio frequency identification (RFID) distance reading testing device which comprises an RFID reader-writer, a pipeline, a plate and a label. The pipeline is formed by assembling short pipe units with shielding layers through connecting pieces, one end of the pipeline is provided with an RFID reader-writer, and the middle of the pipeline is provided with a limiting opening. The test plate is detachably mounted on the limiting part, and a multi-number label is arranged on the test plate. The device adopts a modular design and has the three advantages that the space utilization rate is high, the pipeline length is adjustable, and the device adapts to different test scenes; the closed structure effectively shields external interference and improves the test precision; and multi-label parallel testing is supported, and different label types can be quickly adapted by replacing the preset label plate. According to the device, test environment controllability, operation process standardization and equipment reuse high efficiency are realized, and the accuracy and efficiency of RFID equipment test are remarkably improved.

The application discloses an intelligent warehouse management method and system based on RFID, which comprises the following steps: collecting RFID tag data, article information and sensor information in a warehouse, establishing environment and article combined evaluation factors, designing a frequency band adaptability scoring formula, and dynamically selecting the best working frequency band; and combining the best frequency band to dynamically adjust the transmitting power, so that the RFID system minimizes energy consumption and reduces operation cost under the premise of ensuring identification accuracy and reading distance, and the reliability and intelligent level of the warehouse system are effectively improved.

A packaging for a consumer product is provided with: a first visible code, the first visible code being associated with a first maximum reading distance of a camera and a first information density; and a second visible code having a second maximum distance reading distance and a second information density. The first maximum distance is less than the second maximum distance, and the first information density is greater than the second information density. A system having the packaging and a camera and a method for using the system are also related.

The present invention discloses a step-missing safety device based on radio frequency identification technology, comprising: at least one RFID reader / writer, M passive RFID step tags, and a control system. The RFID reader / writer has a built-in antenna, and establishes a communication connection with the passive RFID step tags via the built-in antenna. The passive RFID step tags have preset step numbers, and the step numbers are different and have a preset sequence. The RFID reader / writer has a preset effective reading distance, within which the RFID reader / writer can simultaneously read the step numbers of N passive RFID step tags, where N is greater than or equal to 3. The control system determines whether an escalator or a sidewalk has a step-missing fault based on the number or sequence of the simultaneously read passive RFID step tags.

The utility model belongs to the technical field of pigeon foot rings, and provides a detachable pigeon foot ring, which comprises a foot ring body, an ultrahigh frequency label and a sizing material block, the end part of the foot ring body is provided with buckling parts which are matched with each other, and a groove is arranged between the buckling parts; the ultrahigh frequency tag is arranged in the groove; the rubber block is filled in the groove and limits the ultrahigh frequency label in the groove; the groove comprises a first positioning part and a second positioning part, the first positioning part is arranged at the bottom of the groove, and the second positioning part is arranged on the side wall of the groove. According to the utility model, the ultrahigh-frequency tag is used for replacing the existing low-frequency tag, so that the reading distance of the pigeon foot ring can be increased; secondly, the ultrahigh-frequency label is limited by the first positioning part, so that the label is prevented from being extruded and deformed by glue during glue filling, and reading of the label in the later period is not affected; and finally, the sizing material block is filled and cured between the second positioning parts and is matched with the second positioning parts for limiting, so that label separation caused by loosening of the sizing material block is avoided.

This utility model discloses a high-sensitivity, ultra-long-range RFID chip, comprising a PET substrate, an antenna, and a chip. The antenna, made of aluminum foil, is etched onto the PET substrate. The antenna includes a rectangular body with a hollowed-out radiating area in the middle. Below the radiating area is a feed port that isolates the antenna. A conductive adhesive layer is coated at the feed port. The chip, conductive adhesive layer, and feed port are fixedly connected by hot pressing. Symmetrical rectangular signal enhancement areas are located at both ends of the body. The signal enhancement areas are integrally formed with the body and located below the body. A long strip-shaped binding and positioning detection groove is located at the bottom of the body corresponding to the feed port. By adopting this solution, the original thick-wire bent antenna is adjusted to a planar antenna, which enhances the signal. At the same time, with the help of signal enhancement from the radiating area and the signal enhancement area, the sensitivity and reading distance of the RFID chip are improved, with a maximum reading distance of 8 to 10 meters.

The invention relates to a system for determining rotation information of an organ (1) around an axis (R) by means of a device comprising an encoder (11, 12) carried by a body (50) fixed in rotation to said organ, said encoder having a track (11a, 12a) capable of emitting a periodic signal representative of the rotational displacement of said organ; a sensor comprising a sensitive pattern (15, 16) disposed at a reading distance (d) from the track (11a, 12a) to deliver the information as a function of said displacement; said system comprising a housing (17) in which said component is rotatably mounted by means of a bearing (18) and, fixed in the housing (17), a module (19) to which the sensor is attached, the guide bearing (18) being carried by the module (19), a spacer (26) for adjusting the reading distance (d) being disposed between the body (50) and the guide bearing (18). Figure 5

The present invention discloses an adaptive range control method and system for combined RFID and barcode reading. The method comprises the following steps: using an RFID reader to capture the backscattered signal of a tag in real time, extracting the carrier frequency offset, and calculating the real-time movement speed and direction of the tag based on the Doppler effect; predicting the first distance between the tag and the RFID reader and the second distance between the tag and the barcode scanner at the next moment based on the real-time movement speed and direction, combined with the fixed spatial coordinates of the RFID reader and the barcode scanner; obtaining the RFID effective reading radius and the barcode effective reading distance; and setting an adjustment strategy to adjust the reading mode based on the relationship between the first distance, the second distance, the RFID effective reading radius, and the barcode effective reading distance. The present invention can improve the dynamic adaptability, collaborative efficiency, and robustness in complex environments of combined tag reading.

The invention discloses a gate control method and device, a gate, a storage medium and a product. The method is applied to the integrated ticket checking gate machine, and the gate machine comprises a machine body with a radio frequency identification card reader and a ticket checking assembly, and a pair of gate plates; the machine body comprises a metal shell with a multipath reflection mechanism; an antenna assembly capable of transmitting carrier signals in the direction of a gate passing channel is integrated in each gate plate. The radio frequency identification card reader is used for identifying a worker certificate containing a radio frequency identification tag; the ticket checking assembly is used for checking audience bills and resident identity cards; the method comprises the following steps: acquiring a certificate identification result or a bill verification result; and controlling the pair of flashboards to open under the condition that the preset passing requirement is met according to the certificate identification result or the bill verification result. According to the invention, the reading distance of antenna signals is increased, signal crosstalk between adjacent gates is eliminated, ticket and certificate simultaneous inspection is realized, two kinds of equipment do not need to be deployed at the same time, and the personnel circulation efficiency is greatly improved.

According to the technical scheme, the myopia-preventing self-moving support is characterized in that the myopia-preventing self-moving support comprises a bottom frame, and the bottom frame is provided with a supporting piece used for fixing a screen / book; the distance measuring part is used for detecting the distance between the underframe and a user; the driving part is used for driving the chassis to move forwards and backwards; the controller controls the driving part to drive the underframe to move back and forth according to a signal of the distance measuring part; the distance between a user and a reading object can be monitored in real time, the position of the support can be automatically adjusted, it is ensured that the reading distance is moderate, the user does not need to manually adjust the position of the support, the correct reading habit of students can be cultivated, visual impairment caused by bad postures is reduced, and therefore myopia is effectively prevented.

The utility model relates to the technical field of electronic tags, in particular to a linear electronic tag for textile tracking and a preparation method of the linear electronic tag. According to the linear electronic tag, a linear metal wire is directly used as a far-field antenna to be integrated in cloth and is coupled with a near-field module; compared with the prior art, the high reading distance and performance can be achieved without improving the shape of the far-field antenna, the production efficiency is improved and the cost is reduced in the mode that the far-field antenna is cut and the coupling module is installed, the technology is more simplified, operation is easy, the method is suitable for large-scale stable production, and development of the field is greatly promoted.

The invention relates to a distance measuring wheel convenient for interpretation, which comprises a main body, a wheel body, a distance measuring assembly, an upper transmission group, a lower transmission group and a middle shaft assembly, the main body comprises a handle part and a wheel fork part, the wheel body is arranged on the wheel fork part, the distance measuring assembly is arranged on the handle part, the upper transmission group is connected with the distance measuring assembly and is provided with an upper connecting gear, and the lower transmission group is connected with the wheel body and is provided with a lower connecting gear. The middle shaft assembly comprises a middle shaft, an elastic piece, an upper joint piece and a lower joint piece, the middle shaft is connected with the upper joint piece and the lower joint piece to rotate synchronously, and the upper joint piece and the lower joint piece are meshed with the upper connecting gear and the lower connecting gear respectively. The elastic force of the elastic piece can push the upper joint piece and the lower joint piece to the upper connecting gear and the lower connecting gear respectively, so that the transmission stability is ensured, and a lower measurement error is maintained.

The application discloses a kind of based on three-dimensional stereo winding intelligent ring NFC system, it is related to near field communication technology and wearable device technical field.The system includes: high-frequency magnetic core module is set in the inside of intelligent ring, is made using soft magnetic material of high magnetic permeability and low loss rate;Stereo winding coil module is formed by three-dimensional winding of metal wire along the bottom and side surface of high-frequency magnetic core module, and is wound on the outer periphery of high-frequency magnetic core module;The two ends of connection terminal module and stereo winding coil module are electrically connected, for coupling to NFC chip;Encapsulating body module is covered high-frequency magnetic core module and stereo winding coil module by preset encapsulating material.Through block magnetic core and bottom plus side surface three-dimensional stereo coil, magnetic field orientation and human body interference suppression are realized;Through actual measurement screening plus simulation optimization, the size of magnetic core, number of turns and encapsulating thickness are determined, improve wearing reading distance, communication success rate, while improving bandwidth tolerance.

1. The name of the design product: wireless measuring instrument (children multi-purpose). 2. The use of the design product: for reading distance measurement and reminder. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: combination state figure 1. 5. Other components that need to be explained: component 1 is a movable ranging probe, component 2 is a display screen and desktop support.

The invention relates to a system for determining information on the rotation of a member (1) around an axis (R) by means of a device comprising an encoder (11, 12) carried by a body (50) integral in rotation with said member, said encoder having a track (11a, 12a) capable of emitting a periodic signal representative of the rotational movement of said member; a sensor comprising a sensitive pattern (15, 16) arranged at a reading distance (d) from the track (11a, 12a) to deliver the information as a function of said movement; said system comprising a casing (17) in which said member is mounted in rotation by means of a bearing (18) and, fixed in the casing (17), a module (19) on which the sensor is associated, the guide bearing (18) being carried by the module (19), a spacer (26) for adjusting the reading distance (d) being arranged between the body (50) and the guide bearing (18). Figure 5

The utility model discloses an RFID reader-writer identification range testing device which comprises an upper computer, a reader-writer fixing seat made of non-metal materials, a horizontal adjusting assembly and a height adjusting assembly, the horizontal adjusting assembly comprises a mounting seat, a moving seat and a horizontal adjusting screw rod, the moving seat is arranged on the mounting seat in a sliding mode, and the height adjusting screw rod is arranged on the moving seat in a sliding mode. The horizontal adjusting screw rod is connected with the moving seat; the height adjusting assembly is arranged on the moving seat and provided with a lifting seat and a label fixing piece made of non-metal materials, and the label fixing piece is located above the reader-writer fixing seat. According to the utility model, the position of the tag fixing plate is adjusted through the horizontal adjusting screw rod and the height adjusting screw rod, so that the adjustment of the relative position of the electronic tag and the RFID reader-writer is realized, the interference of metal can be avoided in the testing process, the maximum reading distance of the RFID reader-writer in the X-axis, Y-axis and Z-axis directions can be accurately measured, and the measurement accuracy is improved. The reliable communication distance in the actual application process is reasonably evaluated, and the situation of collision of the electronic tags is prevented.

The invention discloses an RFID read-write device and a read-write method thereof, and relates to the field of RFID read-write equipment. According to the RFID read-write device and the read-write method thereof, the RFID read-write device comprises an equipment base and a mobile host fixedly arranged on the equipment base, an RFID read-write antenna module and a handle are installed on the two sides of the bottom of the equipment base respectively, and a connecting mechanism is arranged between the RFID read-write antenna module and the equipment base. According to the RFID read-write device and the read-write method thereof, the servo motor is controlled to rotate, during use, the RFID read-write antenna module is overturned out of the storage station, the telescopic connecting plate drives the RFID read-write antenna module to move forwards, the reading distance is adjusted, after use is finished and the telescopic connecting plate shrinks inwards, the RFID read-write antenna module is overturned to enter the storage station, and the RFID read-write antenna module enters the storage station. On one hand, misreading of goods labels of other shelf layers due to the fact that the read-write range of the RFID read-write antenna module is too large is avoided, the goods labels in the deep position of the goods shelf can be read conveniently, and on the other hand, the RFID read-write antenna module can be protected conveniently during carrying.

The application discloses a sensor error determination method, a production system, a program product and a storage medium. The method is based on a preset calibration data set to construct a mapping relationship between a walking distance and a walking time. The calibration data set includes time parameters and distance parameters. The time parameters include timestamp data of at least two marking points on a calibration sample when the at least two marking points pass through at least one calibration station. The distance parameters include physical distance data between the at least two marking points. Based on the timestamp data and the mapping relationship, the calculated distance parameters of the calibration sample when passing through the at least one calibration station are calculated. The calculated distance parameters and read distance parameters are fitted to determine error parameters of the sensor. The read distance parameters include walking readings collected by the sensor when the at least two marking points pass through the at least one calibration station. The calibration and calibration of the sensor error can be realized without stopping and disassembling the equipment, and the calibration process is greatly simplified, and the production interruption and material loss are reduced.

The invention discloses a data error correction method and system for an RFID distance reading terminal, and relates to the technical field of data processing. The method comprises the following steps: performing radio frequency scanning on a working environment, and establishing error reference data; calibrating the original phase data of the target label to obtain a target label data matrix; sparse reconstruction optimization calculation is carried out on the target label data matrix, and a direct path component is separated from a mixed multipath signal of a target label; constructing a phase observation equation set, solving the phase observation equation set, and generating a plurality of candidate distance estimation values; and performing consistency verification fusion on the candidate distance estimation value, the distance calculated based on the direct path time delay and the distance estimated based on the RSSI, and outputting a final corrected distance estimation value. The technical problem that in the prior art, an RFID distance reading terminal is insufficient in distance reading result accuracy in a complex multi-path environment is solved, and the technical effect of improving the distance reading result accuracy is achieved.