CN113590318A - Control system based on radio frequency technology and edge computing equipment - Google Patents
Control system based on radio frequency technology and edge computing equipment Download PDFInfo
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- CN113590318A CN113590318A CN202110854806.7A CN202110854806A CN113590318A CN 113590318 A CN113590318 A CN 113590318A CN 202110854806 A CN202110854806 A CN 202110854806A CN 113590318 A CN113590318 A CN 113590318A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5061—Partitioning or combining of resources
- G06F9/5072—Grid computing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2458—Special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
- G06F16/2471—Distributed queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—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
- 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
- G06K17/0029—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 the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a control system based on a radio frequency technology and edge computing equipment, which comprises a radio frequency system, the edge computing equipment and intelligent terminal equipment, wherein the radio frequency system comprises a label and a radio frequency reading system; the label is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment; the edge computing equipment adjusts and reads the label through the radio frequency reading system, and controls the output of the corresponding intelligent terminal equipment through interaction with the label. The invention has the advantages that the labels to be identified are divided into a plurality of subsets by adding the self-defined query command and the rapid identification data mapping, thereby effectively eliminating the empty time slots or empty nodes in the traditional tree algorithm, improving the identification efficiency of the system, and simultaneously, when the labels respond to the query command of the edge computing equipment, only the ID of the labels needs to be sent to the rest part after being matched with the query prefix, thereby greatly reducing the transmission quantity of information and reducing the energy consumption of the system.
Description
Technical Field
The invention belongs to the technical field of radio frequency and edge computing equipment, and particularly relates to a control system based on a radio frequency technology and edge computing equipment.
Background
Compared with the traditional cloud computing which needs to compute huge data and obtain instant feedback in too many scenes, the scenes begin to expose the defects of cloud computing, more and more devices are connected to the internet and generate data, the cloud computing taking a central server as a node may encounter bandwidth bottlenecks, the cloud computing (such as fig. 1) may be unwilling by instant processing of mass data, and the path for transmitting the privacy data acquired by the cloud computing to a data center is long, so that risks such as data loss or information leakage are easily caused. The edge computing device (as shown in fig. 2) is a development platform which integrates network, computing, storage and application core capabilities at the edge side of a network close to an object or a data source, provides edge intelligent services nearby, and meets the key requirements of industry figures in aspects of agile connection, real-time business, data optimization, application intelligence, safety, privacy protection and the like. The advantages and the development of the edge computing control device are that: more nodes load the traffic, making the data transmission speed faster. The advantages are as follows: closer to terminal equipment, the transmission is safer, and data processing is more immediate, and the influence that the more dispersed node produced than cloud computing trouble is littleer, has still solved equipment heat dissipation problem.
The traditional radio frequency identification technology mainly comprises a reader-writer, a detection antenna, an identification display terminal and the like, the stability of the equipment is reduced by connecting a plurality of devices, meanwhile, the complex program of the whole system is increased, the reader-writer is only responsible for reading labels, the efficiency of the control system is low, the traditional reader-writer can read the labels 50 times/s at the fastest speed when reading the labels, and the label reading speed reaches 100 times/s by using the edge computing device, so that the label reading speed is increased, and the label reading accuracy is greatly increased.
Therefore, a control system based on rf technology and edge computing devices is needed to solve these problems.
Disclosure of Invention
The invention aims to provide a control system based on a radio frequency technology and edge computing equipment.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control system based on radio frequency technology and edge computing equipment comprises a radio frequency system, the edge computing equipment and intelligent terminal equipment, and is characterized in that:
the radio frequency system comprises a tag and a radio frequency reading system;
the label is fixedly arranged on the intelligent equipment and used for controlling the intelligent terminal equipment.
Preferably, through the distribution of the edge computing device and the tags, the average reading rate P of the edge computing device for reading the tags can be obtainedrThe reading rate of the edge computing device to the label is expressed as:
wherein P istIs the basic tag quantity read by the edge device, n is the index of the distance from the edge device to the read tag, i.e. the loss of the read tag as the distance increases, d represents the total number of tags, d0Representing the output power of the edge computing device.
Preferably, by adding a custom query command and a quick identification data mapping in the radio frequency system, an idle time slot or an idle query generated in the tag identification process is eliminated, and meanwhile, the average reading rate of the edge computing device for reading the tag is improved, and the specific process is as follows:
s1, when the ID length of the label is determined, the edge computing device sends a query sequence as an initialization query command, and all labels in the working domain of the edge computing device respond after receiving the query sequence;
s2, when multiple labels respond at the same time, the edge computing device will detect the identification, if the first and second identification bits of the responding label are continuous identification bits, the edge computing device will send a self-defined inquiry command in the next time slot;
s3, after receiving the query command, the tag matches its ID with the query command, and then returns the rest after matching as a mapping data to the edge computing device;
s4, when the edge computing device receives the mapping data returned by the label, it will accurately identify the first two bits of identification information of the label, if the first and second bits are continuous identification bits, then repeat the steps S2-S4 until all labels are successfully identified.
Preferably, if the ID length of the tag is n bits, the query sequence sent by the edge computing device is an n-bit all-1 query sequence (11.. 11) as the initial query command
The invention has the advantages and positive effects that:
the invention divides the label to be identified into a plurality of subsets by adding the self-defined query command and the quick identification data mapping, effectively eliminates the empty time slot or empty node in the traditional tree algorithm, improves the identification efficiency of the system, and simultaneously, when the label responds to the query command of the edge computing equipment, only the ID of the label needs to be sent to the rest part after being matched with the query prefix, thereby greatly reducing the transmission quantity of information and reducing the energy consumption of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of a control system for an edge computing device based on RF technology according to the present invention;
FIG. 2 is a logic diagram of the operation of a control system based on RF technology and edge computing devices according to the present invention;
FIG. 3 is a comparison graph of query cycles for each algorithm;
FIG. 4 is a graph of data transfer rates for each algorithm;
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further described with reference to the accompanying drawings in which:
example 1
As shown in fig. 1-2, a control system based on rf technology and edge computing device includes an rf system, an edge computing device and an intelligent terminal device,
the radio frequency system comprises a tag and a radio frequency reading system;
the label is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment;
the edge computing equipment adjusts and reads the label through the radio frequency reading system, and controls the output of the corresponding intelligent terminal equipment through interaction with the label.
Preferably, through the distribution of the edge computing device and the tags, the average reading rate P of the edge computing device for reading the tags can be obtainedrThe reading rate of the edge computing device to the label is expressed as:
wherein P istIs the basic tag quantity read by the edge device, n is the index of the distance from the edge device to the read tag, i.e. the loss of the read tag as the distance increases, d represents the total number of tags, d0Representing the output power of the edge computing device.
Preferably, by adding a custom query command and a quick identification data mapping in the radio frequency system, an idle time slot or an idle query generated in the tag identification process is eliminated, and meanwhile, the average reading rate of the edge computing device for reading the tag is improved, and the specific process is as follows:
s1, when the ID length of the label is determined, the edge computing device sends a query sequence as an initialization query command, and all labels in the working domain of the edge computing device respond after receiving the query sequence;
s2, when multiple labels respond at the same time, the edge computing device will detect the identification, if the first and second identification bits of the responding label are continuous identification bits, the edge computing device will send a self-defined inquiry command in the next time slot;
s3, after receiving the query command, the tag matches its ID with the query command, and then returns the rest after matching as a mapping data to the edge computing device;
s4, when the edge computing device receives the mapping data returned by the label, it will accurately identify the first two bits of identification information of the label, if the first and second bits are continuous identification bits, then repeat the steps S2-S4 until all labels are successfully identified.
Preferably, if the ID length of the tag is n bits, the query sequence sent by the edge computing device is an n-bit all-1 query sequence (11.. 11) as the initialization query command. .
The working process of the embodiment: when transition reading is carried out, performance comparison is carried out on a CCMA algorithm, a dynamic frame timeslot ALOHA (DFSA) algorithm, a DBSA algorithm and an IACA algorithm in a simulation mode, and the average query period of the performance of the algorithms is measured by adopting three indexes of an average query period, total transmission data volume and energy efficiency, namely the average query period required by identification of one label. Wherein Ntotal represents the total query period (also called time slot) required for identifying n tags, in order to simply and intuitively describe the energy consumption problem in the communication between the tags and the edge computing equipment, Etr is defined as the energy consumption of the tags when receiving the query, and Eu is the tag response
The energy consumption generated when the device is computed should be marginal, so the energy efficiency can be expressed as:
wherein, Q is the total number of inquiry cycles including the number of time slots occupied by the user-defined command QueryP, R is the total tag response times, and Eu is the energy unit.
As shown in fig. 3, average query periods of the DESA algorithm, DBSA algorithm, and IACA algorithm of the CCMA algorithm are compared, and it can be seen that the CCMA algorithm is obviously superior to other CCMA algorithms that the CCMA algorithm needs 2.25 query periods on average for identifying one tag, and the DBSA algorithm and IACA algorithm need 4.9 query periods and 2.98 query periods, respectively.
As shown in fig. 4, the total amount of transmission data required by different algorithms CCMA is significantly smaller than the amount of transmission data required by DBSA and IACA algorithms, which becomes more significant with the performance advantage of CCMA as the number of tags to be identified in the system increases, for example, DBSA and IACA algorithms require 253756 bytes and 77650 bytes of transmission data respectively when the number of tags is 405, while CCMA algorithm requires only 19732 bytes, we can find that DFSA algorithm has an advantage over tree algorithm in the amount of transmission data because random algorithm and deterministic algorithm have different arbitration modes, random algorithm uses pseudo random number RN16 for arbitration, deterministic algorithm uses tag D for arbitration, and generally how many tags contained in deterministic algorithm for identifying slots contain the number contained in random algorithm for identifying slots.
Radio frequency detection antenna is connected this antenna and marginal computing equipment through the cable, and marginal computing equipment reads the reading of algorithm through self reading, and its thick liquids of detection antenna are nickel thick liquid, and wherein the nickel thick liquid satisfies: the adhesive has a viscosity of 85-115 Pa-s, a linear resolution of less than 200 μm, a resistivity of less than 80m Ω/Sq, and an adhesion of greater than or equal to 625N/cm 2. Specifically, the conventional RFID antenna is usually manufactured by printing conductive paste on a substrate, and the main components of the nickel paste include NixB @ Ni composite powder, glass powder, an organic thickener, and the like, and the above effects can be achieved by blending different proportions of various materials.
In the second aspect, network communication between the local industrial personal computer and the remote industrial personal computer is realized by Socket programming. There are two parallel protocols at the TCP/IP transport layer of the Intenet network-TCP and UDP. UDP sends data transmitted by an application to an IP layer, but it is not guaranteed that the data can reach a destination in order and without repetition, and at this time, a user may receive data that is out of order and repeated, and even the data may be missed in a transmission process. TCP does a lot of work to ensure reliability, and provides an acknowledgement and timeout retransmission mechanism and a sliding window mechanism (to control traffic and congestion) inside, and introduces 3-way handshake to eliminate the interference of repeated messages in the process of establishing and closing messages, and provides operations such as forced data transmission to meet real-time requirements. The time delay link from the controller to the actuator and the delay link from the sensor to the controller are described in this document by a pure time delay link ets, and are approximated by a second-order rational function by a Pade approximation method, which is respectively expressed as:
from the reliability, the TCP protocol is selected as the network transmission protocol of the control/feedback information of the system in consideration of the development cost of the application program. An electro-hydraulic position servo system commonly used in an industrial control system is used as a control object, aiming at uncertain time-varying delay of network information transmission, under the condition that a forward channel Tca of the system is less than or equal to 100ms and a feedback channel delay Tsc is less than or equal to 100ms, the designed H controller not only can obtain expected stable control, but also has robustness on bounded perturbation of delay parameters (perturbation within the range of 100 ms). But the effect is not good when any time delay (such as Tca or Tsc is more than 100ms) is processed, and for the situation, as long as the time delay of the remote control system is analyzed and researched sufficiently, the upper bound of the time delay of the remote control system is determined, and the Tca or Tsc is modified to redesign the controller, the more ideal control effect can be obtained
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (4)
1. A control system based on radio frequency technology and edge computing equipment comprises a radio frequency system, the edge computing equipment and intelligent terminal equipment, and is characterized in that:
the radio frequency system comprises a tag and a radio frequency reading system;
the label is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment;
the edge computing equipment adjusts and reads the label through the radio frequency reading system, and controls the output of the corresponding intelligent terminal equipment through interaction with the label.
2. A control system based on rf technology and edge computing devices according to claim 1, characterized in that: through the distribution of the edge computing device and the labels, the average reading rate P of the edge computing device for reading the labels can be obtainedrThe reading rate of the edge computing device to the label is expressed as:
wherein P istIs the basic tag quantity read by the edge device, n is the index of the distance from the edge device to the read tag, i.e. the loss of the read tag as the distance increases, d represents the total number of tags, d0Representing the output power of the edge computing device.
3. A control system based on rf technology and edge computing devices according to claim 2, characterized in that: by adding a custom query command and rapid identification data mapping in a radio frequency system, idle time slots or idle queries generated in the tag identification process are eliminated, and the average reading rate of reading tags by edge computing equipment is improved, and the specific process is as follows:
s1, when the ID length of the label is determined, the edge computing device sends a query sequence as an initialization query command, and all labels in the working domain of the edge computing device respond after receiving the query sequence;
s2, when multiple labels respond at the same time, the edge computing device will detect the identification, if the first and second identification bits of the responding label are continuous identification bits, the edge computing device will send a self-defined inquiry command in the next time slot;
s3, after receiving the query command, the tag matches its ID with the query command, and then returns the rest after matching as a mapping data to the edge computing device;
s4, when the edge computing device receives the mapping data returned by the label, it will accurately identify the first two bits of identification information of the label, if the first and second bits are continuous identification bits, then repeat the steps S2-S4 until all labels are successfully identified.
4. A control system based on rf technology and edge computing devices according to claim 3, characterized in that: if the ID length of the label is n bits, the query sequence sent by the edge computing device is an n-bit all-1 query sequence (11.. 11) as an initialization query command.
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