CN112686069B

CN112686069B - Antenna synchronous movement electronic tag reading and writing method and system

Info

Publication number: CN112686069B
Application number: CN202110304162.4A
Authority: CN
Inventors: 孙斌; 齐鸣
Original assignee: Kunshan Jetech Technology Co ltd
Current assignee: Kunshan Jetech Technology Co ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-06-11
Anticipated expiration: 2041-03-22
Also published as: CN112686069A

Abstract

The invention discloses a method and a system for reading and writing an electronic tag with an antenna moving synchronously, wherein the method comprises the following steps: the m antennas are sequentially arranged along the feeding direction, and are sequentially arranged according to the hop distance sequence or the adjacent antennas are staggered by mq-1 hop distances; the tag feeding line is controlled to feed at a constant speed, the antenna is controlled to reciprocate, the antenna keeps a relatively static state with the corresponding tag to perform read-write operation when moving towards the feeding direction, and the antenna moves towards the opposite direction of the feeding direction and does not work in the process of returning to the initial position. The label feeding line of the invention keeps a constant-speed feeding state all the time, can adjust the moving speed of the feeding line and the antenna, matches labels with different hop distances, and reduces the influence of the hop distances on productivity to the minimum; under the condition of not changing the time required by reading and writing, the productivity can be improved by increasing the reading and writing antenna, the material feeding speed and the antenna moving speed; the antenna moves synchronously, so that the stay time of the tag in the effective read-write area is prolonged, the shielding requirement required by the read-write of the tag is met, and the read-write reliability is improved.

Description

Antenna synchronous movement electronic tag reading and writing method and system

Technical Field

The invention relates to the technical field of electronic tags, in particular to an antenna synchronous movement electronic tag reading and writing method and system.

Background

The radio frequency tag, also called electronic tag or RFID tag, mainly consists of a large scale integrated circuit chip with identification code and a receiving and transmitting antenna, the electric energy in use is taken from the radio wave energy received by the receiving and transmitting antenna, and the radio frequency tag has the advantages of capacity, long communication distance, difficulty in copying, high tolerance to environmental change, capability of reading a plurality of tags at the same time and the like.

At present, the code writing operation in the production process of the electronic tag is mainly carried out by a roll-to-roll detection code writing machine. The existing roll-to-roll detection code writing machine has two modes of stepping and continuous feeding.

The stepping feeding mode refers to that the antenna of the reader-writer is not moved, the label to be read and written moves to the upper part of the antenna to suspend moving until the reading and writing operation is finished and then continues to move. The mode has the advantages that the mode is not limited by the label reading and writing time and can be applied to label production with long reading and writing time, but the feeding process of the equipment is frequently started and stopped in the stepping feeding mode, the capacity is low, and the capacity is generally 200 pieces/minute.

The antenna of the reader-writer is not moved in the continuous feeding mode, and the label to be read and written passes through the effective read-write area above the antenna at a certain speed, so that the reading and writing are completed in the period. Due to the limited range of the effective read-write area above the antenna, the mode is only suitable for the label quality detection with short time consumption and the simplest code writing, and can reach 200 and 300 pieces/minute. Once the read-write application needs a long time, the read-write operation time can be won only by reducing the speed, so that the productivity advantage is lost. Moreover, this continuous feeding mode cannot be used for products with small jump distance (the jump distance refers to the interval in which the label appears continuously on the base paper, i.e. the sum of the length and the interval of the label in the feeding direction). For effective shielding, the smaller the hop distance of the tag, the smaller the effective read-write area of the antenna matched with the tag, the smaller the allowable position deviation, the greater the difficulty in debugging the device, and the difficulty in achieving an ideal read-write effect, so the tag is rarely used in practical applications.

Disclosure of Invention

The invention aims to provide a method and a system for reading and writing an electronic tag with an antenna moving synchronously, so as to solve the technical problem.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the invention provides a method for reading and writing an electronic tag with an antenna synchronously moving, which is applied to a tag reading and writing system, wherein the tag reading and writing system is provided with a tag feeding line, tags are uniformly arranged on the tag feeding line at intervals, the hop distance of the tags is P, and the method comprises the following steps:

s1, m antennas are sequentially arranged beside the label feeding line along the feeding direction, wherein m is a positive integer larger than or equal to 2, the antennas are sequentially arranged according to the hop distance sequence or the adjacent antennas are staggered by mq-1 hop distances, and q is a positive integer;

s2, controlling the label feeding line to feed at a constant speed, and controlling the antenna to reciprocate, wherein the antenna keeps a relatively static state with the corresponding label to perform read-write operation when moving towards the feeding direction, and the antenna moves towards the opposite direction of the feeding direction and does not work when returning to the initial position;

the antenna arranged at the x-th position is responsible for reading all tags at the x + nm position on the tag feeding line, wherein n is a natural number, and the tags read by a single antenna are not repeated.

By adopting the scheme, each antenna and the reference position antenna are staggered by different multiples of hop distances, m antennas read a group of m labels which are at fixed intervals and are not repeated with the previous reading each time, the labels and the corresponding labels are kept in a relatively static state for reading and writing when the antennas move towards the feeding direction, the label feeding line continues to feed when the antennas are reset, the antennas immediately start to move towards the feeding direction next time after returning to the initial position, and the antennas and the next group of m labels synchronously move for reading and writing, so that all the labels can be ensured to be read and written;

the tag feeding line is kept in a constant-speed feeding state all the time, the antenna is kept relatively static with the tag feeding line in the reading and writing process, the moving speed of the feeding line and the antenna can be adjusted, tags with different hop distances are matched, and the influence of the product hop distance on the productivity is reduced to the minimum. Meanwhile, the method of synchronous movement can effectively increase the stay time of the tag in the effective reading and writing area of the antenna, meet the shielding requirement required by the reading and writing of the tag and improve the reading and writing reliability.

On the basis of the technical scheme, the invention can be further improved as follows:

furthermore, the movement of the antenna towards the feeding direction is divided into forward acceleration, uniform speed synchronization and forward deceleration which are sequentially carried out, the speed of the uniform speed synchronization is the same as the feeding speed of the label feeding line, the movement time of the uniform speed synchronization is T, T is more than or equal to the period required by the reading and writing operation of the label, and the antenna and the corresponding label are kept in a relatively static state during the uniform speed synchronization to carry out the reading and writing operation.

By adopting the above scheme, the uniform-speed synchronous movement time T is greater than or equal to the period required by the tag read-write operation, so as to ensure the normal operation of tag read-write, and in order to improve the productivity during the actual operation, the uniform-speed synchronous movement time is generally set to be the same as the period required by the tag read-write operation.

Further, the time for the antenna to move towards the feeding direction is t1, the time for the antenna to move towards the opposite direction of the feeding direction is t2, and the feeding speed of the label feeding line is mP/(t1+ t 2).

By adopting the scheme, the label feeding line moves at the uniform motion mP distance in one reciprocating motion period of the antenna, and the antenna realizes the read-write operation of m labels, so that the feeding speed of the label feeding line can be maximally improved on the premise of ensuring that all labels are read and written, and the productivity is improved.

Further, the time of the antenna moving towards the material feeding direction is equal to the time of the antenna moving towards the opposite direction of the material feeding direction.

Furthermore, the movement of the antenna towards the direction opposite to the feeding direction is divided into reverse acceleration, reverse constant speed and reverse deceleration which are sequentially carried out.

Furthermore, the label feeding line is a rotary feeding line with opposite feeding and discharging directions, and is divided into a feeding section and a discharging section, an even number of antennas are arranged beside the label feeding line, the antennas are divided into two groups of antenna groups with the same number, the two groups of antenna groups are respectively arranged beside the feeding section and the discharging section, the two groups of antenna groups synchronously reciprocate and alternately work, and when one group of antenna groups performs read-write operation, the other group does not work.

By adopting the scheme, the two groups of antenna groups synchronously reciprocate in the same direction, so that when one group of antenna groups and the label synchronously move for reading and writing, the other group of antenna groups moves back to the initial position and does not work, the design that the antenna of at least one feeding section and the antenna of at least one discharging section share one reader can be realized, and the reader is effectively saved under the condition of not influencing the productivity. In addition, the rotary feeding can effectively reduce the length of the equipment, so that the arrangement of each equipment module is more compact.

Further, the time for moving the antenna towards the material feeding direction is longer than the time for moving the antenna towards the opposite direction of the material feeding direction.

By adopting the scheme, the reciprocating motion scheme that t1 is equal to t2 can be further optimized, because the antenna needs to do reciprocating motion, an acceleration and deceleration stage is necessarily existed, the displacement is determined to be nonlinear, the label material walking line always does uniform motion, in order to improve the productivity, the reciprocating motion period of the antenna is shortened as much as possible while the reading and writing time needed by the antenna is ensured, the time for reading and writing the antenna and the time for returning to the initial position can be unevenly distributed, the whole motion is optimized and adjusted, and the resetting is realized by adopting faster acceleration and deceleration, faster speed and shorter time in the process that the antenna returns to the initial position; the tag feeding line moves m tags in one antenna reciprocating period (T1+ T2) and completes read-write operation on a group of m tags, wherein T1 is greater than the period T required by tag read-write, so that the method can be known to increase the number m of antennas and shorten the time of moving the antennas in the opposite direction of feeding, namely the reset time T2, and can effectively increase the productivity.

Furthermore, the label feeding line is a linear feeding line with the same feeding and discharging directions.

The second aspect of the present invention provides an electronic tag reading and writing system using the antenna synchronous moving electronic tag reading and writing method, including:

the label feeding line is provided with labels which are uniformly arranged at intervals, the jump distance of the labels is P, and the label feeding line moves at a constant speed along the feeding direction;

the antennas are used for reading the tags, m antennas are sequentially arranged beside the tag feeding line along the feeding direction of the tag feeding line, the antennas are sequentially arranged according to a hop distance sequence or adjacent antennas are staggered by mq-1 hop distances, wherein q is a positive integer;

a moving unit for controlling the antenna to reciprocate;

when the antenna moves towards the material feeding direction, the antenna and the corresponding label are kept in a relatively static state to perform read-write operation, and when the antenna moves towards the material feeding direction, the antenna does not work.

Compared with the prior art, the invention has the beneficial effects that:

1. when the electronic tag is read and written, the antenna and the tag move synchronously, the antenna and the tag finish reading and writing operations in an approximately relatively static state, and the relative position between the antenna and the tag changes very little, so that the shielding effect of the antenna can be guaranteed, and the phenomenon of cross reading is avoided;

2. when the electronic tag is read, each antenna and the reference position antenna are staggered by different multiples of hop distance, and the antenna group reads a group of tags which are at fixed intervals and are not repeated with the previous reading each time, so that the reading and the writing of the continuously rolled tags can be finished, and omission can be avoided;

3. the label feeding line keeps a constant-speed feeding state, frequent starting and stopping are not needed, the moving speed of the feeding line and the antenna can be adjusted, labels with different hop distances are matched, the influence of the product hop distance on the productivity is reduced to the minimum, and the productivity mainly depends on the number of readers and the moving speed of the feeding line and the antenna under the condition that the reading and writing period of the labels is not changed;

4. the invention can determine the number of the used antennas and the material feeding speed according to the performance, the price, the stability and the usability, thereby improving the productivity by times and obtaining the maximum benefit.

5. The label feeding line can be set to be a rotary type with opposite feeding and feeding directions and opposite discharging and feeding directions, and two groups of antennas which synchronously reciprocate in the same direction are arranged, so that half of readers can be effectively saved, the length of equipment can be reduced by rotary feeding, and the miniaturization of the equipment is facilitated;

6. the invention can unevenly distribute the reciprocating time of the antenna, thereby improving the feeding speed of a label feeding line under the condition of ensuring that the reading and writing period of the label is not changed, thereby improving the productivity, and when the hop distance of the label is 20mm and the reading and writing period is 150ms, the yield is improved by 20 percent after the antenna reciprocating motion is optimized;

7. compared with the traditional reader-writer step feeding mode, the invention effectively improves the productivity, when the tag jump distance is 20mm and the read-write period is 150ms, the productivity of the two antennas is 1.6 times that of the traditional step feeding read-write mode, and the difference distance is gradually enlarged along with the increase of the tag jump distance.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of the movement process of embodiment 1 of the present invention.

Fig. 2 is a time-velocity diagram of antenna movement according to embodiment 1 of the present invention.

Fig. 3 is a time-velocity diagram of antenna motion according to embodiment 2 of the present invention.

Fig. 4 is a schematic diagram of the movement process of embodiment 3 of the present invention.

Fig. 5 is a schematic diagram of the movement process of embodiment 4 of the present invention.

Fig. 6 is a schematic diagram of the movement process of embodiment 5 of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

Example 1:

as shown in fig. 1, an antenna synchronous movement electronic tag reading and writing system includes a tag feeding line and two antennas beside the tag feeding line.

The label feeding line is a straight line, labels are uniformly arranged on the label feeding line at intervals, the jump distance of the labels is P, and the read-write period of the labels is set to be T.

The two antennas are arranged along the material feeding direction of the tag, and the adjacent antennas are arranged in a staggered mq-1 hop distance mode, wherein q is a positive integer. In this example, if the number of antennas m =2 and q =2 is taken, 3 hop distances are staggered between adjacent antennas.

The antenna is controlled to reciprocate by the moving unit, the antenna and the corresponding label are kept in a relatively static state to perform read-write operation when moving towards the feeding direction, and the antenna does not work when moving towards the opposite feeding direction.

As shown in fig. 2, which is a graph of motion time-velocity relationship of an antenna, motion of the antenna in a feeding direction is divided into forward acceleration, uniform velocity synchronization, and forward deceleration, which are sequentially performed, where a velocity V1 of the uniform velocity synchronization is the same as a feeding velocity of a tag feeding line, and a motion time of the uniform velocity synchronization is T, and the antenna and a corresponding tag keep a relatively static state during the uniform velocity synchronization to perform read/write operations.

The movement of the antenna towards the opposite direction of the feeding is divided into reverse acceleration, reverse uniform speed and reverse deceleration which are sequentially carried out, and the speed V2 of the reverse uniform speed is equal to the speed V1 of the uniform speed synchronization.

Wherein S1, S2, S3, S4, S5 and S6 are displacements of forward acceleration, uniform speed synchronization, forward deceleration, reverse acceleration, reverse uniform speed and reverse deceleration, respectively, T1 and T2 are movement times of movement in the feeding direction and movement in the reverse direction of feeding, respectively, wherein S1+ S2+ S3= S4+ S5+ S6, T1= T2> T, and V2= V1.

Setting the time of the antenna for forward acceleration and forward deceleration to be 15ms, T1= T +30ms, and the reciprocating period of the antenna is T1+ T2=2(T +30 ms).

The number of the antennas is m =2, namely, the reciprocating motion of the antennas detects 2 tags at a time, and the material conveying line moves for 2 hop distances. The feeding speed of the label feeding line is V = mP/(T1+ T2) = P/(T +30 ms).

The moving unit is realized by a linear module or a mechanical component which can realize reciprocating motion through a crank connecting rod mechanism controlled by a motor and the like, and the moving unit is the prior art in the field.

As shown in fig. 1, the specific working process of this embodiment is as follows:

when t =0, the antenna No. 1 and the tag No. 1 are in corresponding positions, the antenna and the tag feeding line synchronously start to move towards the feeding direction, and the antenna No. 1 starts to read and write the tag No. 1;

when t = t1, the antenna reaches the termination position, and then the reset movement is started, and meanwhile, the label feeding line still feeds;

when t = t1+ t2, the antenna 1 reaches the initial position and is located at a position corresponding to the tag 3, the antenna and the tag feeding line synchronously start to move towards the feeding direction, and the antenna 1 starts to read and write the tag 3;

when t =2t1+ t2, the antenna reaches the termination position, and then the reset movement is started, and meanwhile, the label feeding line is still feeding;

when t =2t1+2t2, the antenna 1 reaches the initial position and is located at a position corresponding to the tag 5, the antenna 2 reaches the initial position and is located at a position corresponding to the tag 2, the antenna and the tag feeding line synchronously start to move towards the feeding direction, the antenna 1 starts to read and write the tag 5, and the antenna 2 starts to read and write the tag 2;

when t =3t1+2t2, the antenna reaches the termination position, and then the reset movement is started, and meanwhile, the label feeding line is still feeding;

when t =3t1+3t2, No. 1 antenna reaches initial position and is in corresponding position with No. 7 label, No. 2 antenna reaches initial position and is in corresponding position with No. 4 label, and antenna and label walk the stockline and begin to move towards the direction of walking material in step, and No. 1 antenna begins to read and write to No. 7 label, and No. 2 antenna begins to read and write to No. 4 label.

By analogy, the antenna 1 is responsible for reading the tags at the 1 st, 3 rd, 5 th and 7 … 1+2n positions on the tag feeding line, and the antenna 2 is responsible for reading the tags at the 2 nd, 4 th and 6 … 2+2n positions on the tag feeding line (n is a natural number), and two antennas are used for covering all the tags.

Example 2:

this embodiment further optimizes the reciprocating process of the antenna based on embodiment 1.

As shown in fig. 3, which is a graph of motion time-velocity relationship of an antenna, motion of the antenna in a feeding direction is divided into forward acceleration, uniform velocity synchronization, and forward deceleration, which are sequentially performed, where a velocity V1 of the uniform velocity synchronization is the same as a feeding velocity of a tag feeding line, and a motion time of the uniform velocity synchronization is T, and the antenna and a corresponding tag keep a relatively static state during the uniform velocity synchronization to perform read/write operations.

The movement of the antenna towards the opposite side of the feeding direction is divided into reverse acceleration, reverse constant speed and reverse deceleration which are sequentially carried out, wherein the speed V2 of the reverse constant speed is higher than the speed V1 of the constant speed synchronization.

Wherein, S1, S2, S3, S4, S5 and S6 are displacements of forward acceleration, uniform speed synchronization, forward deceleration, reverse acceleration, reverse uniform speed and reverse deceleration respectively, and t1 and t2 are movement time of movement towards the material conveying direction and movement towards the direction opposite to the material conveying direction respectively.

Wherein S1+ S2+ S3= S4+ S5+ S6, t1 > t2, and V2 > V1.

The antenna needs to do reciprocating motion, so that an acceleration and deceleration stage is necessary, the displacement of the antenna is determined to be nonlinear, the label material moving line always does uniform motion, in order to improve the productivity, the reciprocating motion period of the antenna is shortened as much as possible while the reading and writing time required by the antenna is ensured, the time for reading and writing the antenna and the time for returning to the initial position can be unevenly distributed, the whole motion is divided into the processes of forward acceleration, uniform speed synchronization, forward deceleration, reverse acceleration, reverse uniform speed and reverse deceleration, and optimization adjustment is carried out. In the process that the antenna returns to the initial position, reverse constant speed and faster acceleration and deceleration which are higher than the constant speed synchronous speed are adopted, resetting is realized at a faster speed and in a shorter time, and the reciprocating period of the antenna is t1+ t2<2t 1. For ease of understanding and visual display of the data relationships, assume an optimized reciprocation period T1+ T2= 2T.

The antenna reciprocates once, the label feeding line moves for 2 jump distances, and the feeding speed of the antenna is V = mP/(T1+ T2) = mP/2T = 2P/2T.

Example 3:

as shown in fig. 4, this embodiment is substantially the same as embodiment 2, and also optimizes the antenna reciprocating motion, and unevenly distributes the time for the antenna to perform the read-write operation and the time for returning to the initial position, but the difference is that four antennas are configured in this embodiment, the antenna reciprocates once, and the tag feeding line moves by 4 hops.

The four antennas are arranged along the feeding direction, and the adjacent antennas are arranged in a staggered mq-1 hop distance mode, wherein q is a positive integer. In this example, if the number of antennas m =4 and q =1 is taken, the adjacent antennas are staggered by 3 hop distances.

For the convenience of understanding and visual display of data relationship, the optimized reciprocating motion period T1+ T2=2T is assumed, and the feeding speed of the label feeding line is V = mP/(T1+ T2) = 4P/2T.

For the sake of visual illustration of the working process of the present embodiment, it is assumed that t1=3t2, i.e. the time for the antenna to move in the feeding direction is three times the reset time. The specific working process of this embodiment is as follows:

when t =0, the antenna No. 1 and the label No. 1 are in corresponding positions, the antenna and the label feeding line synchronously start to move towards the feeding direction, and the label No. 1 starts to be read and written;

when t = t1, the antenna reaches the end position, at this time, the label feeding line moves by 3 hop distances, and then the reset motion is started, and meanwhile, the label feeding line still feeds;

when t = t1+ t2, the antenna returns to the initial position, at this time, the tag feeding line continues to move by 1 hop distance, the

antennas

1 and 2 are respectively located at corresponding positions with the

tags

5 and 2, the antenna and the tag feeding line synchronously start to move towards the feeding direction, and the

tags

5 and 2 start to be read and written;

when t =2t1+2t2, the antenna returns to the initial position, the

antennas

1, 2 and 3 are respectively at the corresponding positions with the

tags

9, 6 and 3, the antenna and the tag feeding line synchronously start to move towards the feeding direction, and the

tags

9, 6 and 3 start to be read and written;

when t =3t1+3t2, the antenna returns to the initial position, the

antennas

1, 2, 3 and 4 are respectively located at corresponding positions with the

tags

13, 10, 7 and 4, the antennas and the tags synchronously start to move towards the feeding direction when feeding the material lines, and the

tags

13, 10, 7 and 4 start to be read and written.

By analogy, the antenna 1 is responsible for reading all tags at the 1 st, 5 th, 9 … 1+4n positions on the tag feeding line, the antenna 2 is responsible for reading all tags at the 2 nd, 6 th, 10 … 2+4n positions on the tag feeding line, the antenna 3 is responsible for reading all tags at the 3 rd, 7 th, 11 … 3+4n positions on the tag feeding line, the antenna 4 is responsible for reading all tags (n is a natural number) at the 4 th, 8 th, 12 … 4+4n positions on the tag feeding line, and all tags are covered by four antennas.

Example 4:

as shown in fig. 5, this embodiment is substantially the same as embodiment 3 except that the antennas are arranged in a hop sequence.

The specific working process of this embodiment is as follows:

when t =0, the

antennas

1, 2, 3 and 4 are respectively at corresponding positions with the

tags

1, 2, 3 and 4, the reading and writing work is started, the antenna and the tag feeding line synchronously start to move towards the feeding direction, and the

tags

1, 2, 3 and 4 are started to be read and written;

when t = t1+ t2, the antenna returns to the initial position, the

antennas

1, 2, 3 and 4 are respectively located at corresponding positions with the

tags

5, 6, 7 and 8, the antennas and the tag feeding lines synchronously start to move towards the feeding direction, and the

tags

5, 6, 7 and 8 begin to be read and written.

Example 5:

as shown in fig. 6, in this embodiment, a scheme is further optimized on the basis of embodiment 1, the label feeding line in this embodiment is a rotary feeding line having opposite feeding and discharging directions, and the label feeding line is divided into a feeding section and a discharging section having opposite feeding directions.

The two antennas are divided into a feeding section group and a discharging section group which are respectively arranged at the feeding section and the discharging section.

The mobile unit controls the two antennas to synchronously reciprocate in the same direction, when one antenna moves towards the material feeding direction for reading and writing, the other antenna moves towards the opposite direction of the material feeding direction and does not work, so that the operation of sharing one reader-writer by the two antennas can be realized, and the reader-writer is effectively saved under the condition of not influencing the productivity. In this embodiment of the rotary feed, two antennas are used, the first (the lower feed upstream antenna in the figure) and the second (the upper feed downstream antenna in the figure) are staggered by 7 hops (mq-1 =7, where m =2, q = 4).

When the material is conveyed in a rotary manner, because one antenna group always works in the reciprocating process of the antenna group, the relationship between the motion time and the motion speed of the antenna shown in fig. 2 is adopted, and V1= V2, and T1= T2> T.

Comparative example:

and (3) reading and writing the label by adopting a stepping feeding mode of a detection code writing machine, namely, the antenna is not moved, and the label to be read and written is moved to the upper part of the antenna and is suspended to move until the label is continuously moved after the reading and writing operation is finished. The jump distance of the label is P, the read-write period of the label is set to be T, the feeding speed of a label feeding line is V =20m/min, the start-stop time is 30ms, and the time (stepping feeding time) T from the label detection completion to the detection start of the next label is obtained_m=P÷V+30ms。

Example of effects:

the productivity of examples 1, 2, 3, 4, 5 and comparative examples were calculated by setting the tag hop distances P to 20, 30, 40, 50, 60, 70mm and the read/write cycles T to 150, 200, 250, 300ms, respectively, wherein the productivity of examples is calculated by dividing 1 ÷ (T1+ T2) × m, i.e., 1 divided by the antenna reciprocation cycle times the number of tags (number of antennas) read/written in one cycle. The productivity calculation formula of the comparative example is 1 ÷ (T + T)_m) I.e. 1 divided by the sum of the read-write period and the step-by-step walking time. The productivity units are converted to pieces/minute. The feed speed of the label feed line of the example is V = mP/(t1+ t 2). For examples 1, 5, the antenna reciprocation time was evenly distributed, and the antenna acceleration and deceleration time was set to be 15ms, then T1= T2, T1+ T2=2(T +15 × 2 ms); for examples 2, 3, 4, the antenna round trip time was non-uniformly distributed, setting t1>T2, and T1+ T2= 2T.

The calculations are summarized in the following table:

as shown in the table, the productivity of the embodiment 1 is the same as that of the embodiment 5, and the rotary feed line of the embodiment 5 does not affect the productivity, but can effectively save the number of the readers and the cost.

The productivity of the

embodiments

3 and 4 is twice that of the embodiment 2, because the number of the antennas of the

embodiments

3 and 4 is twice that of the embodiment 2, and the speed of the label feeding line is correspondingly increased to be twice that of the embodiment 2. In actual production, the number of the used antennas and the material feeding speed can be determined according to performance, price, stability and usability, so that the maximum benefit can be obtained.

In the embodiment 4, the staggered positions of the antennas are different from those in the embodiment 3, the arrangement sequence is also different, but the reading and writing results are the same, and all the tags on the feeding line are covered by four antennas to jointly complete the reading and writing operation of the continuous tag roll. And it can also be seen that even if the order of numbering of the antennas is reversed as in embodiment 5, the order of detection is changed, the result of reading and writing is not changed.

Because the volume of the antenna and the shielding mechanism is large, the antenna is difficult to be arranged in sequence according to the size of the label in practical use, so that the method for staggering mq-1 hop distances of adjacent antennas is more practical, the quantity of the staggered hop distances of the adjacent antennas can be adjusted according to the size of the label, and the parameter q is reasonably set.

In the productivity of embodiments 1 to 5, under the condition that the reciprocating period of the antenna is not changed, the feeding speed of the label feeding line is increased along with the increase of the jump distance of the label, so that the productivity is kept unchanged; in the step-by-step feeding mode of the comparison example, under the condition that the read-write period T is not changed, the productivity is gradually reduced along with the increase of the jump distance of the label.

The productivity of example 2 is much higher than that of comparative example 1, when the tag hop distance is 20mm and the read-write cycle is 150ms, the productivity of example 2 is 1.6 times that of comparative example 1, and the advantage is gradually increased as the tag hop distance is increased.

The productivity of the embodiment 2 is higher than that of the embodiment 1, because the movement process of the antenna of the embodiment 2 is optimized, and the time for the antenna to move towards the direction opposite to the feeding direction is shorter than the time for the antenna to move towards the feeding direction, the reciprocating movement time of the antenna is shortened and the productivity is improved under the condition that the reading and writing period of the antenna is not changed. When the label jump distance is 20mm and the read-write period is 150ms, the production capacity of the embodiment 2 is improved by 20 percent compared with the embodiment 1.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. An antenna synchronous movement electronic tag reading and writing method is applied to a tag reading and writing system, and is characterized in that the tag reading and writing system is provided with a tag feeding line, tags are uniformly arranged on the tag feeding line at intervals, the hop distance of the tags is P, and the method comprises the following steps:

the antenna arranged at the x-th position is responsible for reading all tags at the x + nm position on the tag feeding line, wherein n is a natural number, and the tags read by a single antenna are not repeated;

the movement of the antenna towards the feeding direction is divided into forward acceleration, uniform speed synchronization and forward deceleration which are sequentially carried out, the speed of the uniform speed synchronization is the same as the feeding speed of the label feeding line, the movement time of the uniform speed synchronization is T, wherein T is more than or equal to the period required by label read-write operation, and the antenna and the corresponding label are kept in a relatively static state to carry out read-write operation when the uniform speed synchronization is carried out;

the time that the antenna moves towards the feeding direction is t1, the time that the antenna moves towards the opposite direction of the feeding direction is t2, and the feeding speed of the label feeding line is mP/(t1+ t 2).

2. The antenna synchronous moving electronic tag reading and writing method according to claim 1, wherein the time of the antenna moving towards the feeding direction is equal to the time of the antenna moving towards the opposite direction of the feeding.

3. The antenna synchronous movement electronic tag reading-writing method according to claim 2, characterized in that the movement of the antenna towards the direction opposite to the material-moving direction is divided into reverse acceleration, reverse uniform velocity and reverse deceleration which are sequentially performed.

4. The antenna synchronous movement electronic tag reading and writing method according to claim 3, characterized in that the tag feeding line is a rotary feeding line with opposite feeding and discharging directions, and the tag feeding line is divided into a feeding section and a discharging section, an even number of antennas are arranged beside the tag feeding line, the antennas are divided into two groups of antennas with the same number, the two groups of antennas are respectively arranged beside the feeding section and the discharging section, and the two groups of antennas reciprocate synchronously and work alternately, and when one group of antennas performs reading and writing, the other group of antennas does not work.

5. The antenna synchronous moving electronic tag reading and writing method according to claim 1, wherein the time of the antenna moving towards the feeding direction is longer than the time of the antenna moving towards the opposite direction of the feeding.

6. The antenna synchronous movement electronic tag reading and writing method according to claim 2, 3 or 5, characterized in that the tag feeding line is a straight line type feeding line with the same feeding and feeding directions as the discharging and feeding directions.

7. An electronic tag reading and writing system using the antenna synchronous moving electronic tag reading and writing method of any one of claims 1 to 6, comprising:

a moving unit for controlling the antenna to reciprocate;