CN113590318B - 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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- CN113590318B CN113590318B CN202110854806.7A CN202110854806A CN113590318B CN 113590318 B CN113590318 B CN 113590318B CN 202110854806 A CN202110854806 A CN 202110854806A CN 113590318 B CN113590318 B CN 113590318B
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- 230000008569 process Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 101100377807 Arabidopsis thaliana ABCI1 gene Proteins 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 4
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Classifications
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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 tag and a radio frequency reading system; the tag is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment; the edge computing equipment adjusts and reads the tag through the radio frequency reading system, and controls the output of the corresponding intelligent terminal equipment through interaction with the tag. The method has the advantages that the label to be identified is divided into a plurality of subsets through adding the custom query command and the rapid identification data mapping, so that empty time slots or empty nodes in the traditional tree algorithm are effectively eliminated, the identification efficiency of the system is improved, and meanwhile, when the label responds to the query command of the edge computing equipment, only the rest part of the label after the ID is matched with the query prefix is required to be sent, so that the information transmission quantity is greatly reduced, and the energy consumption of the system is reduced.
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 get 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 bottleneck, the instant processing of massive data may make the cloud computing (as shown in fig. 1) not worry, the path of private data acquired by the cloud computing transmitted to a data center is longer, and risks such as data loss or information leakage are easily caused. The edge computing device (as shown in fig. 2) is a development platform integrating network, computing, storage and application core capabilities on the network edge side close to a subject or data source, provides edge intelligent services nearby, and meets the key requirements of industry numbers in aspects of agile connection, real-time service, data optimization, application intelligence, security, privacy protection and the like. Advantages and developments of edge computing control devices, one: more nodes load traffic, making data transmission faster. The advantages are as follows: the method is closer to the terminal equipment, safer in transmission, more instant in data processing, smaller in influence of more dispersed nodes than cloud computing faults, and solves the problem of equipment heat dissipation.
The traditional radio frequency identification technology is mainly divided into 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 equipment, the complex program of the whole system is increased, the reader-writer is only responsible for reading the tag, the efficiency of a control system is low, the tag can be read 50 times/s at the highest speed by using the traditional reader-writer when the tag is read, the tag reading speed reaches 100 times/s by using the edge computing equipment, the tag reading speed is increased, and the tag reading accuracy is greatly increased.
Therefore, there is a need to design a control system based on rf technology and edge computing devices to solve these problems.
Disclosure of Invention
The invention aims to provide a control system based on radio frequency technology and edge computing equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a control system based on radio frequency technique and edge computing device, includes radio frequency system, edge computing device and intelligent terminal equipment, its 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, the average reading rate P of the tags read by the edge computing device can be obtained through the distribution of the edge computing device and the tags r The read rate of the label by the edge computing device is expressed as:
wherein P is t Is the basic label quantity read by the edge device, z is the distance index of the label read by the edge device, namely the loss of the read labels along with the distance increase, d represents the total quantity of the labels, and d 0 Representing the output power of the edge computing device.
Preferably, by adding custom queries in a radio frequency system
The mapping of the command and the quick identification data eliminates the idle time slot or empty inquiry generated in the label identification process, and improves the average reading rate of the edge computing equipment for reading the labels, and the specific process is as follows:
s1, when the ID length of a tag is determined, the edge computing device sends a query sequence as an initialization query command, and all tags in the working domain of the edge computing device respond after receiving the query sequence;
s2, when a plurality of labels respond simultaneously, the edge computing device detects that identification occurs, and if the first identification bit and the second identification bit of the responding labels are continuous identification bits, the edge computing device sends a custom inquiry command in the next time slot;
s3, after the tag receives the query command, matching the ID of the tag with the query command, and returning the rest matched part as mapping data to the edge computing device;
s4, accurately identifying the first two identification information of the label after the edge computing equipment receives the mapping data returned by the label, and repeating the steps S2-S4 until all the labels are successfully identified if the first identification bit and the second identification bit are continuous identification bits.
Preferably, if the ID length of the tag is m bits, (11..11) the query sequence sent by the edge computing device is one m bits all 1 as the initialization 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 custom inquiry command and the quick identification data mapping, effectively eliminates empty time slots or empty nodes appearing in the traditional tree algorithm, improves the identification efficiency of the system, and simultaneously only needs to send the rest part of the label after the ID and the inquiry prefix are matched when responding to the inquiry command of the edge computing equipment, 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 invention or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a block diagram of a control system based on RF technology and edge computing devices 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 various algorithms;
FIG. 4 is a graph of the data transmission rates of the algorithms;
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication 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 in a specific case.
The invention is further described below with reference to the accompanying drawings:
example 1
As shown in fig. 1-2, 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,
the radio frequency system comprises a tag and a radio frequency reading system;
the tag is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment;
the edge computing equipment adjusts and reads the tag through the radio frequency reading system, and controls the output of the corresponding intelligent terminal equipment through interaction with the tag.
Preferably, the average reading rate P of the tags read by the edge computing device can be obtained through the distribution of the edge computing device and the tags r The read rate of the label by the edge computing device is expressed as:
wherein P is t Is the basic label quantity read by the edge device, z is the distance index of the label read by the edge device, namely the loss of the read labels along with the distance increase, d represents the total quantity of the labels, and d 0 Representing the output power of the edge computing device.
Preferably, by adding a custom inquiry command and quick identification data mapping in the radio frequency system, idle time slots or empty inquiry generated in the label identification process is eliminated, and meanwhile, the average reading rate of the label read by the edge computing equipment is improved, and the specific process is as follows:
s1, when the ID length of a tag is determined, the edge computing device sends a query sequence as an initialization query command, and all tags in the working domain of the edge computing device respond after receiving the query sequence;
s2, when a plurality of labels respond simultaneously, the edge computing device detects that identification occurs, and if the first identification bit and the second identification bit of the responding labels are continuous identification bits, the edge computing device sends a custom inquiry command in the next time slot;
s3, after the tag receives the query command, matching the ID of the tag with the query command, and returning the rest matched part as mapping data to the edge computing device;
s4, accurately identifying the first two identification information of the label after the edge computing equipment receives the mapping data returned by the label, and repeating the steps S2-S4 until all the labels are successfully identified if the first identification bit and the second identification bit are continuous identification bits.
Preferably, if the ID length of the tag is m bits, the query sequence sent by the edge computing device is one m-bit all 1 (11..11) as the initialization query command. .
The working procedure of this embodiment is: and when transition reading is carried out, performance comparison is carried out on a CCMA algorithm, a dynamic frame time slot ALOHA (DFSA) algorithm, a DBSA algorithm and an IACA algorithm in a simulation mode, and an average query period, namely the total transmission data quantity and the energy efficiency, is adopted to measure the performance average query period of the algorithm, namely the average query period required by identifying one label. Wherein Ntotal represents identifying n labels
For a total required interrogation period (also referred to as a time slot), for a simple and intuitive description of the energy consumption problem in the communication of the tag with the edge computing device, etr is defined as the energy consumption of the tag when receiving the interrogation, eu is the energy consumption of the tag when responding to the edge computing device, and thus the energy efficiency can be expressed as:
wherein Q is the total number of inquiry cycles, which includes the number of time slots occupied by the custom command QueryP, R is the total number of tag responses, and Eu is the energy unit.
As shown in fig. 3, the average query periods of the CCMA algorithm, the DESA algorithm, the DBSA algorithm and the IACA algorithm are compared, and it can be seen that the CCMA algorithm is significantly superior to the CCMA algorithm of other algorithms in that the CCMA algorithm needs 2.25 query periods on average for identifying one tag, and the DBSA algorithm and the IACA algorithm need 4.9 and 2.98 query periods, respectively.
As shown in fig. 4, the total transmission data size of the CCMA algorithm required for different algorithms is significantly smaller than the transmission data size of the DBSA and IACA algorithms, and the performance advantages of the CCMA algorithm become more obvious as the number of tags to be identified in the system increases, for example, when the number of tags is 405, the DBSA and IACA algorithms respectively require 253756 bytes and 77650 bytes of transmission data size, while the CCMA algorithm only requires 19732 bytes, and at the same time, the DFSA algorithm can be found to have advantages over the tree algorithm in terms of transmission data size, because the arbitration modes of the randomness algorithm and the deterministic algorithm are different, the randomness algorithm adopts the pseudo-random number RN16 for arbitration, and the deterministic algorithm uses the tag D for arbitration, in the case that the number of tags included in the identification time slot in the deterministic algorithm is more than the number of tags included in the identification time slot in the deterministic algorithm.
The radio frequency detection antenna is connected with the edge computing equipment through a cable, the edge computing equipment reads the tag through a self reading algorithm, the size of the detection antenna is nickel size, and the nickel size meets the following conditions: the viscosity is between 85 Pa.s and 115 Pa.s, the linear resolution is less than 200 mu m, the resistivity is less than 80mΩ/Sq, and the adhesive force is more than or equal to 625N/cm < 2 >. Specifically, the conventional RFID antenna is generally manufactured by printing conductive paste on a substrate, and the main components in the nickel paste comprise NixB@Ni composite powder, glass powder, an organic thickener and the like, so that the effects can be achieved by preparing 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, TCP and UDP, at the TCP/IP transport layer of the Internet. UDP transmits data that is transmitted from an application program to an IP layer, but does not guarantee that the data can arrive at a destination in order and not repeatedly, and at this time, a user may receive data that is out of order and repeated, and even the data may be missed in the transmission process, so that the application program must solve reliability (such as a message loss, repetition, real-time and flow control problem) on the basis of UDP, which necessarily increases development difficulty and cost of the application program, but transmission efficiency of UDP is higher. TCP does a lot of work to ensure reliability, provides an acknowledgement and timeout retransmission mechanism, a sliding window mechanism (to control traffic and congestion), 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, etc. to meet real-time requirements. The time delay from the controller to the actuator and the delay from the sensor to the controller are described herein as pure delay elements et and are approximated by a second order rational function using the Pade approximation method.
From the reliability, the development cost of the application program is considered, and the TCP protocol is selected as the network transmission protocol of the control/feedback information of the system. The electro-hydraulic position servo system commonly used in an industrial control system is used as a control object, and the H controller is designed to obtain expected stable control and have robustness on the bounded perturbation of time delay parameters (perturbation within the range of 100 ms) under the condition that the forward channel Tca of the system is less than or equal to 100ms and the feedback channel time delay Tsc is less than or equal to 100ms aiming at the uncertain time-varying time delay of network information transmission. However, the method has poor effect when processing any time delay (such as Tca or Tsc is greater than 100 ms), and for such a situation, the ideal control effect can be obtained by only performing enough analysis and research on the time delay of the remote control system to determine the upper bound of the time delay of the remote control system and modifying the Tca or Tsc to redesign the controller
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (1)
1. The utility model provides a control system based on radio frequency technique and edge computing device, includes radio frequency system, edge computing device and intelligent terminal equipment, its characterized in that:
the radio frequency system comprises a tag and a radio frequency reading system;
the tag is fixedly arranged on the intelligent terminal equipment and used for controlling the intelligent terminal equipment;
the edge computing equipment adjusts and reads the tag through the radio frequency reading system and controls the output of the corresponding intelligent terminal equipment through interaction with the tag;
by 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 obtained r The read rate of the label by the edge computing device is expressed as:
wherein P is t Is the basic label quantity read by the edge device, z is the distance index of the label read by the edge device, namely the loss of the read labels along with the distance increase, d represents the total quantity of the labels, and d 0 Representing an output power of the edge computing device;
by adding a custom inquiry command and quick identification data mapping in a radio frequency system, idle time slots or empty inquiry generated in the label identification process is eliminated, and meanwhile, the average reading rate of the label read by the edge computing equipment is improved, and the specific process is as follows:
s1, when the ID length of a tag is determined, the edge computing device sends a query sequence as an initialization query command, and all tags in the working domain of the edge computing device respond after receiving the query sequence;
s2, when a plurality of labels respond simultaneously, the edge computing device detects that identification occurs, and if the first identification bit and the second identification bit of the responding labels are continuous identification bits, the edge computing device sends a custom inquiry command in the next time slot;
s3, after the tag receives the query command, matching the ID of the tag with the query command, and returning the rest matched part as mapping data to the edge computing device;
s4, accurately identifying the front two identification information of the label after the edge computing equipment receives the mapping data returned by the label, and repeating the steps S2-S4 until all the labels are successfully identified if the first and second identification bits are continuous identification bits;
if the tag has an ID length of m bits, the edge computing device transmits a query sequence of one m bits all 1 (11..11) as an initialization query command.
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