CN110766106A - Dense archive information acquisition system based on switch switching control and high-frequency RFID technology - Google Patents
Dense archive information acquisition system based on switch switching control and high-frequency RFID technology Download PDFInfo
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- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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Abstract
The invention discloses a dense file information acquisition system based on switch switching control and high-frequency RFID technology, which comprises a control module, a plurality of radio frequency readers-writers, N switch control modules and N radio frequency antennas, wherein the controller is connected with the radio frequency readers-writers, the radio frequency readers-writers are connected with the N switch control modules, each switch control module is respectively used for controlling whether one radio frequency antenna is conducted or not, each radio frequency antenna is arranged opposite to one radio frequency label, and the controller is used for broadcasting an information reading instruction to the radio frequency readers-writers and acquiring radio frequency label information in a polling mode. The invention is suitable for the radio frequency point-to-point management of a large-scale dense file system, and has simple structure and convenient installation.
Description
Technical Field
The invention belongs to the intelligent warehousing management technology, and particularly relates to a dense file information acquisition system based on switch switching control and a high-frequency RFID technology.
Background
The invention patent CN206726245 provides a dense archive management system based on a high-frequency RFID technology, which comprises a control module, a radio frequency reader-writer and a radio frequency tag, wherein the control module controls the radio frequency reader-writer to read information of the radio frequency tag; the system consists of a control module and a plurality of radio frequency readers, and the control module is connected with the radio frequency readers through data lines, so that the system is simple in structure and convenient to install and implement on site; by adding the control module, the system can be expanded into a radio frequency management system with a multi-stage control module structure, and can easily deal with larger-scale intensive file management; and each path of radio frequency antenna is uniquely identified through the ID numbers of the control module and the radio frequency reader-writer. However, the design of the rf reader in this patent application has the following problems:
the design adopts a mode that a radio frequency reader-writer is connected with a radio frequency antenna. Because the radio frequency antenna and the managed file are in one-to-one correspondence, when the file size is enlarged, the number of the required radio frequency readers is greatly increased. The radio frequency reader-writer is a key part of the radio frequency reader-writer and is expensive, so that the system cost is greatly improved, and the market application of the system is limited;
the control module is connected with the radio frequency readers in a serial mode, and the control module queries the radio frequency readers on the bus one by one to acquire the RFID label information. The working mode is as follows: the control module sends an inquiry command, the radio frequency reader-writer receives the command, the radio frequency reader-writer reads the label and the radio frequency reader-writer feeds back the label information to the control module. Obviously, the larger the archive management scale is, the more radio frequency readers/writers need to be connected to the bus by the control module, and the longer the time required for obtaining all the RFID tag information of the system is. This is associated with a significant reduction in the real-time response of the system.
Disclosure of Invention
The invention aims to provide a dense archive information acquisition system based on switch switching control and high-frequency RFID technology.
The technical solution for realizing the invention is as follows: a dense archive information acquisition system based on switch switching control and high-frequency RFID technology comprises a control module, a plurality of radio frequency readers, N switch control modules and N radio frequency antennas, wherein the controller is connected with the radio frequency readers, the radio frequency readers are connected with the N switch control modules, each switch control module is used for controlling whether one radio frequency antenna is conducted or not, each radio frequency antenna is arranged opposite to one radio frequency tag, and the controller is used for broadcasting an information reading instruction to the radio frequency readers and acquiring radio frequency tag information in a polling mode.
Preferably, the control module comprises N-level controllers, the controller at the upper level is connected with M controllers at the lower level through a bus, and N, M are all natural numbers.
Preferably, the controllers each include a CPU, a power module, an address selection module, and a communication module, the CPU is a single chip, the power module is configured to supply power, the address selection module is configured to set an ID number of the controller and the number of controllers in a next stage according to a sequence of the controller, and the communication module is configured to implement communication with the controllers in a previous stage and/or a next stage and convert an output level of the CPU into a specified standard specified level.
Preferably, the radio frequency reader-writer comprises a CPU, an address selection module, a communication module, a power module and a radio frequency read-write module, wherein the CPU is a single chip microcomputer, the power module is used for supplying power, the address selection module is used for setting an ID number of the reader-writer in the reader-writer connected with the controller, the communication module is used for realizing communication with a previous-stage controller connected with the communication module, the radio frequency read-write module comprises a high-frequency RFID chip and a filtering and matching circuit, the high-frequency RFID chip is used for outputting a modulated high-frequency signal and receiving the high-frequency signal coupled back by the radio frequency antenna, and the filtering and matching circuit is used for filtering a higher harmonic component of the high-frequency signal and realizing impedance matching with the.
Preferably, the switch control module adopts an optical coupling module as the switch device.
Compared with the prior art, the invention has the following remarkable advantages:
(1) simple structure, simple to operate: the invention is realized by N-level control, the structure is clear, the controllers among all levels are connected through a data line, one file corresponds to one label, and the label is attached to a file box or the file and corresponds to the radio frequency antenna one by one;
(2) the expansion is convenient: the invention can determine the number of control levels and the number of antennas according to actual needs, and the ID number and the connected lower level number are set through an addressing module, namely N is variable, and the program determines the size of a file storage area and a polling process through the setting of a reading dial switch;
(3) the cost performance is high: the hardware structures of the controller and the radio frequency reader-writer are simple, the maintenance is convenient, the number and the price of components are far lower than those of components related to a radio frequency module based on an ultrahigh frequency technology, and the key points are that one radio frequency reader-writer corresponds to N radio frequency antennas, so that the cost of N-1 radio frequency reader-writers is saved, and the cost performance is high;
(4) the software has high efficiency and good real-time property: based on the arrangement of a hardware structure, the invention acquires the file information and adopts a broadcasting and polling mode, so that the change of the file can be fed back in time, and the real-time performance is obviously improved.
The present invention is described in further detail below with reference to the attached drawings.
Drawings
FIG. 1 is a schematic diagram of a controller assembly.
Fig. 2 is a schematic diagram of the reader/writer composition.
FIG. 3 is a schematic structural view of embodiment 1.
Fig. 4 is a flow chart of the operation of the present invention.
Detailed Description
A dense archive information acquisition system based on switch switching control and high-frequency RFID technology comprises a control module, a plurality of radio frequency readers, N switch control modules and N radio frequency antennas, wherein the controller is connected with the radio frequency readers, the radio frequency readers are connected with the N switch control modules, each switch control module is used for controlling whether one radio frequency antenna is conducted or not, each radio frequency antenna is arranged opposite to one radio frequency tag, and the controller is used for broadcasting an information reading instruction to the radio frequency readers and acquiring radio frequency tag information in a polling mode.
In a further embodiment, the control module includes N-level controllers, the upper-level controller is connected to M lower-level controllers through a bus, and N, M are all natural numbers. The number of stages of the controller is set according to the actual data amount.
In some embodiments, the files are placed on the file rack, the position of each file is fixed, each path of radio frequency antenna is arranged opposite to the radio frequency label of each file, the radio frequency reader-writer controls the on-off state of the multiple paths of radio frequency antennas through a plurality of switches, and each layer is provided with a plurality of layers of radio frequency tags
In certain embodiments, the control module includes two level controllers, each connected to M primary controllers via a bus.
As shown in fig. 1, in a further embodiment, the controllers each include a CPU, a power supply module, an address selection module, and a communication module, the CPU is a single chip, the power supply module is configured to supply power, the address selection module is configured to set an ID number of the controller and the number of controllers in a next stage according to a sequence of the controllers, and the communication module is configured to implement communication with the controllers in a previous stage and/or a next stage, and convert an output level of the CPU into a specified standard specified level.
As shown in fig. 2, in a further embodiment, the radio frequency reader-writer includes a CPU, an address selecting module, a communication module, a power module, and a radio frequency reading-writing module, where the CPU is a single chip, the power module is used to supply power, the address selecting module is used to set an ID number in a reader-writer connected to a previous stage and a master controller of the reader-writer, the communication module is used to implement communication with a controller of the previous stage, the radio frequency reading-writing module includes a high frequency RFID chip and a filtering and matching circuit, the high frequency RFID chip is used to output a modulated high frequency signal and receive a high frequency signal coupled back by the radio frequency antenna, and the filtering and matching circuit is used to filter a higher harmonic component of the high frequency signal and implement impedance.
In a further embodiment, the switch control module uses an optocoupler module as the switching device. And is responsible for the conduction of the radio frequency antenna between the radio frequency reader and the radio frequency reader.
The invention is suitable for radio frequency point-to-point management of a large-scale dense file system, wherein one radio frequency reader-writer is connected with N switch control modules, and one switch module is connected with one radio frequency antenna. The radio frequency reader-writer controls the switch control module to be switched on and off, so that signals of the radio frequency read-write module on the radio frequency reader-writer can be sent to the radio frequency antenna connected with the radio frequency read-write module through the switch control module in a switching-on mode, and information of the radio frequency tag is read. The controller in the control module can be connected with N (N is more than or equal to 1) radio frequency readers through a serial bus, so that large-scale radio frequency point-to-point management of the dense files is realized. In the aspect of function realization, a mode of combining a broadcast control instruction and a polling query instruction is adopted, a system controller sends a radio frequency tag reading instruction to a radio frequency reader-writer in a broadcast mode, and receives radio frequency tag information fed back by the radio frequency reader-writer by using a point-to-point query instruction. According to the invention, point-to-point reading of a plurality of radio frequency tags can be realized through one radio frequency reader-writer and the multi-way switch module, and compared with a common mode that one radio frequency reader-writer reads one radio frequency tag, the application cost of large-scale dense file radio frequency management is greatly reduced; meanwhile, the broadcasting is combined with the polling software design, so that the real-time property of the system for responding to the change of the radio frequency tag is ensured. The system designed by the invention is easy to expand, convenient to maintain, high in cost performance and good in market prospect.
As shown in fig. 4, the working process of the present invention is:
and (3) starting the system, namely broadcasting and sending a radio frequency query starting instruction to the secondary controller from the upper computer, sending the same instruction to the primary controller by the secondary controller, and carrying out the same operation on the radio frequency reader-writer by the primary controller. In order to conveniently introduce the uploading process of the file information, the introduction is started from the working flow of the radio frequency reader after receiving a radio frequency inquiry starting instruction sent by the primary controller:
the radio frequency reader-writer controls whether the optical coupling module is conducted or not through a control line, when the radio frequency reader-writer polls a certain path, the corresponding optical coupling is conducted, and other paths are in a closed state, so that after the antenna reads the file label information, the file label information is uploaded to the radio frequency reader-writer through a data line, the radio frequency reader-writer collects all data from the data line, an inquiry instruction of a primary controller is waited, and the ID number of each path of antenna is limited through hardware design. After receiving a radio frequency opening instruction of the secondary controller, the primary controller broadcasts a radio frequency reading and writing instruction to a radio frequency reader-writer connected to the primary master control, after the radio frequency reader-writer finishes the operation of reading label information, the primary controller sends inquiry instructions in sequence according to ID numbers in a certain period, the IDs of the radio frequency reader-writers are set by an address selection module according to the actual installation sequence, and then the primary controller receives file information uploaded by the radio frequency reader-writer, collects the file information, updates the file data information, and uploads the file information after the inquiry of the secondary controller. And exchanging information of the secondary controller and the primary controller with the primary controller and the radio frequency reader-writer. It should be emphasized that after the primary controller receives the rf start command sent by the secondary controller, the start plus polling of the rf reader has already started, and the query command of the secondary controller and the operation of the primary controller on the rf reader are independent from each other, which is considered for the real-time property of the update of the file information. As shown in fig. 3, after the upper computer broadcasts the start command to the secondary controller, polling is performed at a certain period to update the archive information of the database. The size of the archival information data that the system can collect depends on the number of N on each level. In addition, the radio frequency tag corresponds to information on a specific file for the radio frequency antenna to read.
Example 1
As shown in fig. 3, in this embodiment, the present invention and the existing system are respectively utilized to perform information acquisition on files placed in 3 compact shelves, each compact shelf is 6 layers and 3 rows, that is, 6 × 3 placing cells, each cell places 4 files, then, a radio frequency antenna is arranged corresponding to a radio frequency tag on each file one by one, 4 radio frequency antennas corresponding to each cell are connected to a radio frequency reader/writer, 3 secondary controllers are responsible for 3 rows, 3 radio frequency readers/writers on each layer are connected to a primary controller through a bus, 6 primary controllers corresponding to 6 layers of each compact shelf are connected to 1 secondary controller, and 3 secondary controllers are connected to an upper computer through a bus.
In this embodiment, the time required for the rf reader to read the information of one rf antenna is 20ms, and the polling period of the controller is 100 ms.
The working modes of the existing system are as follows: the controller sends an inquiry command, the radio frequency reader-writer receives the command, the radio frequency reader-writer reads the label and the radio frequency reader-writer feeds back the label information to the controller.
According to the working mode of the existing system, after the primary controller sends the query instruction, the radio frequency reader-writer starts to read the antenna information, the time required for reading 4 antennas is 20 × 4, namely 80ms, and the time for the primary controller to acquire one piece of radio frequency reader-writer information is 180ms after one query period plus 80 ms. Meanwhile, the layer has 3 sections, so that the time required for uploading all the file information of the layer to the primary control of the layer is 180 x 3ms, namely 540 ms. Similarly, the time when the secondary controller on the current column to which the layer belongs acquires the profile information of the layer is: when the secondary controller issues a query instruction, the primary controller starts querying, so that the sum of 540ms and a polling cycle is 640ms, each compact shelf has 6 layers, and the time for acquiring all the file information of the current compact shelf is 640 × 6, namely 3840 ms. In the same way, the time for the upper computer to acquire the file information of the current compact shelf is 3840ms plus one polling cycle, and 3 compact shelves are provided in total, and the time for acquiring all the file information of the whole system is 3940 × 3ms, namely 11820 ms.
The working mode of the invention is as follows: the controller broadcasts and sends a read-write instruction to all the radio frequency readers connected to the bus, the radio frequency readers receive the instruction, all the radio frequency readers simultaneously start to read the tags, and when the radio frequency reading and writing are finished, the controller polls all the radio frequency readers-the radio frequency readers respectively to feed back tag information to the controller in a certain period.
According to the mode of working the invention, the primary controller firstly broadcasts the radio frequency read-write command, 3 radio frequency readers on one layer start working, and the time for reading 4 antennas by one radio frequency reader-writer is 20 x 4ms, namely 80 ms. The primary controller waits for 80ms, and the starting point sends a query instruction in a cycle of 100ms to the point, so that the time for the primary controller to acquire all the archive information on the layer is 100 x 3ms, and in addition, the waiting time of 80ms is 380 ms. Similarly, the secondary controller on the shelf to which the current layer belongs actually needs to wait 380ms to obtain the latest information, so the time for the current shelf to obtain all the file information is 100 × 6ms, 6 is the number of layers on the row, and then one waiting time is added, which is 980ms in total. Similarly, the time for the upper computer to acquire all the archive information is the polling cycle of 100ms multiplied by the number of compact shelves 3, and the time for waiting for each column to acquire the information is 980ms, which is 1280ms in total.
From the above calculation, in the case of a definite installation example, the time for uploading all the archive information of the former mode to the upper computer is 11820ms, while the time for uploading all the archive information of the former mode to the upper computer is 1280 ms.
Obviously, as the file size is increased and the number of the controller stages is increased, the time gap between the invention and the prior art is more and more obvious. Therefore, the real-time performance of the invention in the aspect of large-scale archive management is remarkably improved.
In practical use of the present invention, fig. 3 and 4 show the difference in the number of connection stages of the controller. When the method is implemented on site, only the fixed positions and the connection lines of the equipment and the setting of the addressing module need to be arranged, and all levels of software do not need to be modified.
Claims (5)
1. A dense archive information acquisition system based on switch switching control and high-frequency RFID technology is characterized by comprising a control module, a plurality of radio frequency readers-writers, N switch control modules and N radio frequency antennas, wherein the controller is connected with the radio frequency readers-writers, the radio frequency readers-writers are connected with the N switch control modules, each switch control module is used for controlling whether one radio frequency antenna is conducted or not, each radio frequency antenna is arranged opposite to one radio frequency label, and the controller is used for broadcasting information reading instructions to the radio frequency readers-writers and acquiring radio frequency label information in a polling mode.
2. The system for acquiring the dense archive information based on the on-off switching control and the high-frequency RFID technology according to claim 1, wherein the control module comprises N-level controllers, the upper-level controller is connected with M lower-level controllers through buses, and N, M are all natural numbers.
3. The system for acquiring dense archive information based on-off switching control and high-frequency RFID technology according to claim 2, wherein the controllers each comprise a CPU, a power supply module, an addressing module and a communication module, the CPU is a single chip microcomputer, the power supply module is used for supplying power, the addressing module is used for setting the ID number of the controller and the number of the controllers at the next level according to the sequence of the controllers, and the communication module is used for realizing communication with the controllers at the previous level and/or the controllers at the next level and converting the output level of the CPU into a specified standard specified level.
4. The dense archive information acquisition system based on the switch switching control and the high-frequency RFID technology according to claim 1, wherein the radio frequency reader-writer comprises a CPU, an addressing module, a communication module, a power module and a radio frequency read-write module, the CPU is a single chip microcomputer, the power module is used for supplying power, the addressing module is used for setting an ID number of the reader-writer in the reader-writer connected with the controller, the communication module is used for realizing communication with a previous-stage controller connected with the communication module, the radio frequency read-write module comprises a high-frequency RFID chip and a filtering and matching circuit, the high-frequency RFID chip is used for outputting a modulated high-frequency signal and receiving the high-frequency signal coupled back by the radio frequency antenna, and the filtering and matching circuit is used for filtering a higher harmonic component of the high-frequency signal and realizing impedance matching with the radio frequency.
5. The switch-over control and high-frequency RFID technology based dense archive management system according to claim 1, characterized in that the switch control module adopts an optocoupler module as a switch device.
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| CN111645066A (en) * | 2020-04-30 | 2020-09-11 | 南京理工大学 | File management system and method combining visual guidance grabbing robot with radio frequency monitoring |
| CN111797947A (en) * | 2020-05-25 | 2020-10-20 | 武汉天喻聚联网络有限公司 | Radio frequency antenna polling method and system |
| CN112668683A (en) * | 2020-12-25 | 2021-04-16 | 广州安的电子科技有限公司 | Intelligent safety door and detection method thereof |
| CN112764366A (en) * | 2020-11-17 | 2021-05-07 | 宁波鑫海智造科技有限公司 | File cabinet folder identification control circuit |
| CN113704053A (en) * | 2021-07-27 | 2021-11-26 | 广州南盾通讯设备有限公司 | Equipment cabinet asset management device and control method thereof |
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