阅读说明：本技术 基于rfid的六氟化硫气体全寿命周期管理系统及方法 (Sulfur hexafluoride gas full-life cycle management system and method based on RFID ) 是由 齐国栋 谢连科 张永 张用 巩泉泉 亓秋波 臧玉魏 于 2021-08-10 设计创作，主要内容包括：本发明提供了一种基于RFID的六氟化硫气体全寿命周期管理系统及方法,包括射频识别子系统、称重子系统及远端控制平台；所述方案设计一种可以自动称钢瓶重量的标签以及可以用于钢瓶信息储存的标签,并基于两种标签提出了一种实现六氟化硫充气量、回收回用量、净化量、新气购置量及入出库信息等全链条自动化的数据收集方法；有效减少手工录入对于现场工作带来负担,提高了六氟化硫气体管理效率。(The invention provides a sulfur hexafluoride gas full-life cycle management system and method based on RFID, comprising a radio frequency identification subsystem, a weighing subsystem and a remote control platform; the scheme designs a label capable of automatically weighing the steel cylinder weight and a label capable of being used for storing the steel cylinder information, and provides a full-chain automatic data collection method for realizing the sulfur hexafluoride gas filling amount, the recycling amount, the purifying amount, the new gas purchasing amount, the warehousing-in and warehousing-out information and the like based on the two labels; the burden of manual input on field work is effectively reduced, and the sulfur hexafluoride gas management efficiency is improved.)

1. A sulfur hexafluoride gas life cycle management system based on RFID is characterized by comprising a radio frequency identification subsystem, a weighing subsystem and a remote control platform; wherein the content of the first and second substances,

the radio frequency identification subsystem is used for storing the basic information of the steel cylinder and purchasing and recycling related information by using the electronic tag, and realizing information acquisition and information updating in the electronic tag through a reader-writer and an upper computer;

the weighing subsystem comprises a self-tuning weighing sensor tag arranged at the bottom of the steel cylinder, the self-tuning weighing sensor tag is used for hanging a metal film at a tag antenna through compressible foam, and the weight of gas is measured based on the distance between the metal film and the tag antenna when the foam is compressed;

the remote control platform is used for issuing information acquisition and updating instructions to the radio frequency identification subsystem and the weighing subsystem and receiving the feedback data information; and collecting and processing the data of the whole life cycle of the sulfur hexafluoride gas.

2. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 1, wherein said self-tuned load cell tags are based on chameleon engine chip control, matching varying antenna impedances by dynamically adjusting chip impedances.

3. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 1 wherein a specified thickness of insulation is disposed between said electronic tag and the surface of the cylinder.

4. The RFID-based sulfur hexafluoride gas full-life cycle management system of claim 1, wherein the gas quality is determined based on a distance between the metal film and the tag antenna during foam compression, specifically: when the weight of the measured object is increased, the distance between the metal film and the tag antenna is changed to generate the changes of impedance and sensor codes; determining a relationship of a sensor code to gravity based on a change in the sensor code of the self-tuned weighing sensor tag; and the relation between the matching capacitor and the weight is obtained by combining the relation between the sensor code and the matching capacitor, so that the quality of the gas in the steel cylinder is measured.

5. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 4 wherein said sensor code versus gravity relationship is specified as follows:

DEC＝0.25*F*S+8

where DEC is the sensor code and F is the weight of the object being measured.

6. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 4 wherein said relationship between sensor code and matching capacitance is specified as follows:

Cp＝1.9+2.06*DEC/1000

wherein Cp is a matching capacitance.

7. The RFID-based sulfur hexafluoride gas full-life cycle management system of claim 4, wherein said matching capacitance to weight relationship is specified as follows:

Cp＝5.15*10^-5*M+1.91648

wherein M is the weight of the measured object.

8. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 1 wherein said self-tuned load cell tag chip is a Magnus S chip having a set of 32 capacitance states and a 5-bit sensor code representing the tuning setting.

9. The RFID-based sulfur hexafluoride gas full life cycle management system of claim 1 wherein said cylinder base information includes sulfur hexafluoride cylinder number, name, model, unit of manufacture, and verification time.

10. An RFID-based sulfur hexafluoride gas full life cycle management method utilizing the RFID-based sulfur hexafluoride gas full life cycle management system as claimed in any one of claims 1-9, said method comprising:

storing the basic information of the steel cylinder and the purchasing and recycling related information based on the electronic tag, and realizing information acquisition, information updating and information feedback in the electronic tag through a reader-writer and an upper computer according to a control command issued by a remote control platform;

the weight of the gas in the steel cylinder is measured in real time through the self-tuning weighing sensor tag, and the measured weight information is fed back to the remote control platform;

and the remote control platform receives the fed back data information and then performs corresponding processing to realize the management of the whole life cycle of the sulfur hexafluoride gas.

Technical Field

The invention belongs to the technical field of monitoring management, and particularly relates to a sulfur hexafluoride gas life cycle management system and method based on RFID.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Sulfur hexafluoride (SF6) gas is widely used in high and medium voltage electrical equipment due to its excellent insulating and arc extinguishing properties. However, the greenhouse effect of SF6 gas is 23900 times that of CO2, and the SF6 gas can exist in air for 3200 years. In order to control and reduce the emission of sulfur hexafluoride gas, a sulfur hexafluoride recycling working mechanism needs to be established, however, the working mechanism involves a plurality of stages of capital construction, operation and maintenance, overhaul, retirement, purification treatment and reuse, and has the following problems:

(1) the gas consumption and the gas charging quantity of the SF6 steel cylinder of the electrical equipment of the system can not be quickly and accurately obtained

The sulfur hexafluoride electrical equipment in the power grid system is huge in quantity, most of the nameplates of the operation equipment are not marked with gas consumption and equipment volume (the equipment contains various complex structures and is difficult to estimate through the shape), and the gas filling quantity of SF6 is unknown; SF6 gas inflation quantity marked on the nameplates of part of newly-put-into-service equipment is inaccurate, and actual operation pressure is generally higher than a rated pressure value, so that accurate data of sulfur hexafluoride gas consumption of system electrical equipment is difficult to master, gas recovery rate cannot be controlled during equipment maintenance and retirement, and the recovery rate cannot reach the standard.

(2) Data information of the whole life cycle of SF6 can not be effectively obtained and automatically managed

The quantities of newly purchased SF6 gas, recovered gas, purified gas, gas recycling quantity, inventory and the like are huge every year, and due to the lack of an effective material management and control technology, the problems that the recovered gas cannot be timely sent to a sulfur hexafluoride treatment center, the purified gas is not timely taken and filled into equipment, the newly purchased gas quantity cannot be uniformly managed and controlled and the like still exist, so that the supervision of the whole life cycle of the SF6 gas is difficult to carry out.

Disclosure of Invention

In order to solve the problems, the invention provides a system and a method for managing the whole life cycle of sulfur hexafluoride gas based on RFID, and the system and the method effectively improve the management efficiency of the sulfur hexafluoride gas based on a designed label for automatically weighing the steel cylinder and a label for storing the information of the steel cylinder.

According to a first aspect of the embodiment of the invention, the sulfur hexafluoride gas full-life cycle management system based on the RFID comprises a radio frequency identification subsystem, a weighing subsystem and a remote control platform; wherein the content of the first and second substances,

the radio frequency identification subsystem is used for storing the basic information of the steel cylinder and purchasing and recycling related information by using the electronic tag, and realizing information acquisition and information updating in the electronic tag through a reader-writer and an upper computer;

the weighing subsystem comprises a self-tuning weighing sensor tag arranged at the bottom of the steel cylinder, the self-tuning weighing sensor tag is used for hanging a metal film at a tag antenna through compressible foam, and the weight of gas is measured based on the distance between the metal film and the tag antenna when the foam is compressed;

the remote control platform is used for issuing information acquisition and updating instructions to the radio frequency identification subsystem and the weighing subsystem and receiving the feedback data information; and collecting and processing the data of the whole life cycle of the sulfur hexafluoride gas.

Further, the self-tuning weighing sensor tag is controlled based on a chameleon engine chip, and the impedance of the chip is dynamically adjusted to match the changed antenna impedance.

Furthermore, in order to avoid the electromagnetic field of the metal steel cylinder from generating current accidents and causing the failure of reading and writing of the electronic tag, an insulating material with a specific thickness is arranged between the electronic tag and the surface of the steel cylinder.

Further, the gas quality is measured based on the distance between the metal film and the tag antenna during foam compression, specifically: when the weight of the measured object is increased, the distance between the metal film and the tag antenna is changed to generate the changes of impedance and sensor codes; determining a relationship of a sensor code to gravity based on a change in the sensor code of the self-tuned weighing sensor tag; and the relation between the matching capacitor and the weight is obtained by combining the relation between the sensor code and the matching capacitor, so that the quality of the gas in the steel cylinder is measured.

According to a second aspect of the embodiments of the present invention, there is provided an RFID-based sulfur hexafluoride gas full-life cycle management method, which utilizes the RFID-based sulfur hexafluoride gas full-life cycle management system, and includes:

storing the basic information of the steel cylinder and the purchasing and recycling related information based on the electronic tag, and realizing information acquisition, information updating and information feedback in the electronic tag through a reader-writer and an upper computer according to a control command issued by a remote control platform;

the weight of the gas in the steel cylinder is measured in real time through the self-tuning weighing sensor tag, and the measured weight information is fed back to the remote control platform;

and the remote control platform receives the fed back data information and then performs corresponding processing to realize the management of the whole life cycle of the sulfur hexafluoride gas.

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

(1) the invention provides a sulfur hexafluoride management and control system based on an RFID technology, which is based on a designed label capable of automatically weighing the weight of a steel cylinder and a label capable of being used for storing information of the steel cylinder, realizes a full-chain automatic data collection mode of sulfur hexafluoride gas filling amount, recycling amount, purification amount, fresh gas purchasing amount, warehousing-in and warehousing-out information and the like, and effectively reduces the burden of manual input on site work.

(2) The scheme of the invention applies the chameleon technology to the aspect of weight measurement, designs an automatic weighing label based on RFID, automatically acquires the weight of the sulfur hexafluoride steel cylinder through the automatic weighing label, reads the positions of an electronic label and a GPS/Beidou positioning and weighing device on the sulfur hexafluoride steel cylinder by combining an RFID card reader, writes the acquired information of the weight, the label, the position and the like into the electronic label, and automatically transmits the data to a remote control platform through the Internet of things.

(3) The invention designs a label packaging method which eliminates the influence of a steel cylinder on the reading rate of the label, and the reading rate of the electronic label is improved by arranging the insulating material with specific thickness between the electronic label and the surface of the steel cylinder.

Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a flow chart of the whole process of sulfur hexafluoride gas circulation in the first embodiment of the present invention;

FIG. 2 is a charging process according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of an RFID system according to a first embodiment of the invention;

fig. 4 is an equivalent circuit of a conventional tag according to a first embodiment of the present invention;

FIG. 5 is a schematic diagram of a tag self-tuning equivalent circuit according to a first embodiment of the present invention;

FIG. 6 is a diagram illustrating self-tuning tag simulation according to a first embodiment of the present invention;

FIG. 7 is a graph illustrating the tag test results of the self-tuning load cell in accordance with the first embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a distance test between a tag and a metal surface according to a first embodiment of the present invention;

fig. 9 is a diagram of a success rate reading interface of the reader according to the first embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The first embodiment is as follows:

the embodiment aims to provide a sulfur hexafluoride gas life cycle management system based on RFID.

A sulfur hexafluoride gas life cycle management system based on RFID comprises a radio frequency identification subsystem, a weighing subsystem and a remote control platform; wherein the content of the first and second substances,

the radio frequency identification subsystem comprises an electronic tag, a reader-writer and an upper computer; the electronic tag is used for storing basic information of the steel cylinder and purchasing and recycling related information, and information collection and information updating in the electronic tag are realized through the reader-writer and the upper computer;

the weighing subsystem comprises a self-tuning weighing sensor tag arranged at the bottom of the steel cylinder, the self-tuning weighing sensor tag is used for hanging a metal film at a tag antenna through compressible foam, and the weight of gas is measured based on the distance between the metal film and the tag antenna when the foam is compressed;

the remote control platform is used for issuing information acquisition and updating instructions to the radio frequency identification subsystem and the weighing subsystem and receiving the feedback data information; and collecting and processing the data of the whole life cycle of the sulfur hexafluoride gas.

Further, the self-tuning weighing sensor tag is controlled based on a chameleon engine chip, and the impedance of the chip is dynamically adjusted to match the changed antenna impedance.

Further, the chip of the self-tuning load cell tag is a Magnus S chip, a set of capacitors of which has 32 capacitance states and a 5-bit sensor code representing the tuning setting.

Furthermore, in order to avoid the electromagnetic field of the metal steel cylinder from generating current accidents and causing the failure of reading and writing of the electronic tag, an insulating material with a specific thickness is arranged between the electronic tag and the surface of the steel cylinder.

Further, the gas quality is measured based on the distance between the metal film and the tag antenna during foam compression, specifically: when the weight of the measured object is increased, the distance between the metal film and the tag antenna is changed to generate the changes of impedance and sensor codes; determining a relationship of a sensor code to gravity based on a change in the sensor code of the self-tuned weighing sensor tag; and the relation between the matching capacitor and the weight is obtained by combining the relation between the sensor code and the matching capacitor, so that the quality of the gas in the steel cylinder is measured.

Further, the relationship between the sensor code and gravity is specifically expressed as follows:

DEC＝0.25*F*S+8

where DEC is the sensor code, DEC and the number "8" are both unitless, F is the measured weight in 'N', S is the contact area in m²。

Further, the relationship between the sensor code and the matching capacitor is specifically expressed as follows:

Cp＝1.9+2.06*DEC/1000

where Cp is the matching capacitance in pF, and 1.9 and 2.06 in pF.

Further, the relationship between the matching capacitance and the weight is specifically expressed as follows:

Cp＝5.15*10^-5*M+1.91648

wherein, M is F/g, the weight of the measured object is kg, and g is 10N/kg.

Specifically, for ease of understanding, the embodiments of the present invention are described in detail below with reference to the accompanying drawings:

firstly, the whole process of sulfur hexafluoride gas circulation is described with reference to fig. 1:

and after the fresh gas is purchased, the purchasing information is uploaded to a purchasing fresh gas database, and the gas is put in storage. And when the steel cylinder is put in storage, the steel cylinder information is collected, the state of the steel cylinder is changed, and the storage data is uploaded to a gas storage database. In order to ensure the normal operation of equipment, the gas in a warehouse needs to be inspected in a qualified way, if the gas is qualified, the gas is stored in a central warehouse, the available gas quantity is updated, and if the gas is not qualified, the recyclable part is purified for reuse; the unrecoverable waste is subjected to secondary development and utilization after treatment such as alkali liquor absorption.

Before and after gas purification, information including equipment number, weight, gas parameters, operator number and the like is written into an electronic tag of the steel cylinder (an insulating material with a specific thickness is arranged between the electronic tag and the surface of the steel cylinder), a gas purification database is updated, and warehousing operation is completed after purification is qualified. The gas is uniformly distributed to the next stage unit for use by the remote control platform. The lower-level unit uploads information such as equipment, gas consumption, operator numbers and the like to a gas data for the transformer substation and a gas database of the in-service equipment while using the lower-level unit.

Due to the instability of the equipment, the equipment needs to be overhauled regularly, the weight of the residual gas in the steel cylinder needs to be measured and recovered during the overhaul of the equipment, information such as write-in allowance, equipment numbers, maintainers and the like is written in the electronic tag, and meanwhile, the data is updated to a gas recovery database. Due to the limited service life of the equipment, the replacement of the equipment in the temporary period is needed to ensure the normal operation of power supply, and the state marking of the equipment in the retired state is needed in the system to prevent misuse and cause bad results.

Next, the charging work flow will be described in detail with reference to fig. 2:

because the sulfur hexafluoride gas is uniformly distributed by the center, the recovered gas also needs to be conveyed to the processing center for uniform purification and recovery, and the sulfur hexafluoride is mainly stored in the steel cylinder at present, so that quality supervision and supervision of the steel cylinder are indispensable.

After the steel bottle arrives at a station, whether the worker is damaged or not is checked by experience, if the damage is caused, the steel bottle is placed into the area to be detected, and if not, the steel bottle is placed into the filling area through the sorting belt. In the filling district, the super high frequency read write line transmission energy activation electronic tags to the steel bottle basic information that reads in the electronic tags reads label steel bottle information, wherein the steel bottle information includes: the electronic label number, the steel cylinder self-number, the manufacturer code, the next inspection date, the material and the model of the steel cylinder, the affiliated unit and other basic information, and meanwhile, the reader-writer judges whether the steel cylinder exceeds the inspection date and is scrapped or not according to the next inspection date and the service life. If qualified, the steel bottle is conveyed to be filled by the sorting belt, and if unqualified, the steel bottle is conveyed to the area to be detected by the sorting belt and then is conveyed to the inspection station. Qualified steel bottle fills the dress by the staff, fills the dress back and rechecks by inspection personnel to filling the good real bottle (through the preorder inspection qualified and accomplish the steel bottle that gas filled the dress), and the area is picked up in the real bottle differentiation of qualified entering, and unqualified carries out recovery processing with gas. Information such as gas filling weight, filling personnel ID, inspection personnel, time and the like is written into the filled steel bottle label through a reader-writer, a gas filling record table is automatically generated, information is automatically uploaded to a system database, and finally the steel bottle is transmitted to a real bottle area through a sorting belt.

The invention provides a sulfur hexafluoride gas life cycle management system based on RFID, which comprises a radio frequency identification subsystem, a weighing subsystem and a remote control platform; the main inventive concept of the invention is as follows: the label that can weigh steel bottle weight automatically and can be used for steel bottle information storage have been designed to put forward one kind based on two kinds of labels and realized sulfur hexafluoride gas filling amount, the volume of retrieving back to, purification volume, new gas purchase volume and the full chain automation's such as warehouse entry information data collection method, specific:

(1) radio Frequency Identification (RFID) subsystem

The ultrahigh frequency RFID technology is a technology that uses radio frequency signals to realize contactless information transmission in a space coupling (alternating magnetic field or electromagnetic field) manner, and achieves the purpose of identification by means of the transmitted information. The most important advantage of the ultrahigh frequency RFID technology is non-contact identification, the information of materials entering and exiting the warehouse including the information of personnel and equipment can be recorded noninductively, and the materials can be rapidly managed by one-time collection of weighing measurement.

The sulfur hexafluoride material control based on the RFID technology mainly comprises an electronic tag, a reader-writer and an upper computer. The upper computer is in charge of central control, and completes the functions of storing, processing, inquiring and the like of the sulfur hexafluoride steel cylinder information by the database through data communication with the reader-writer; the electronic tag is used for storing information such as the serial number, name, model, production unit, inspection time and the like of the sulfur hexafluoride steel cylinder; the reader-writer is used for writing instant information of the sulfur hexafluoride steel cylinder into the electronic tag or reading working state information of the sulfur hexafluoride steel cylinder from the electronic tag, and timely finishing commands of the upper computer for uploading and downloading data. In the system, the reader-writer and the upper computer complete communication through various serial ports of RS232, RS485, Wiegand and TCPIP network interfaces, the reader-writer and the electronic tag complete data exchange in a full duplex mode, and the working frequency is an ultrahigh frequency band of 902-plus 930 MHz.

The system applies the RFID label technology to realize remote reading and writing, and solves the problem of ineffective management. Because the read-write distance is long, the filling and checking data information can be automatically read or written into the electronic tag by the reader-writer and automatically uploaded to the system database, the defects of complicated operation, negligence, high labor intensity and the like of manually holding the terminal machine are avoided, and the working efficiency is greatly improved. The reader-writer automatically judges whether the steel cylinder is an overdue unchecked unqualified steel cylinder according to the label reading information, the qualified steel cylinder is sent to a filling area by a sorting belt, the unqualified steel cylinder is automatically sent to a region to be detected, the inspection is waited, and manual operation is not needed.

Furthermore, when the tag is attached to a metal surface, the performance of the tag is deteriorated, and the main reason is that a metal environment electromagnetic field generates current, so that the field intensity of an incident magnetic field is weakened, energy is offset again, and finally, the read-write operation fails. If the reading work of the tag on the metal surface is to be finished, the electronic tag needs to be specially processed, so that the electronic tag can be applied to the metal surface. The invention considers that a special anti-metal label antenna design method is adopted, but the cost is higher; research shows that the influence of metal boundary conditions (metal media around the electronic tag) on the tag is reduced by raising the tag to a certain height from the metal surface; therefore, the common label is higher than the surface of the metal steel cylinder through the insulating material pad by adopting the method. In order to select the proper distance between the label and the metal surface, we have performed the corresponding experimental test, as shown in fig. 8, which is an experimental schematic diagram of the distance between the label and the metal surface; during the experiment, the time interval for reading the label by the reader-writer is set as a fixed value, the distance between the label and the reader-writer is fixed at 1.5 m, the number of plastic sheets on the surfaces of the label and the steel cylinder is gradually increased to change the interval distance, and the label reading rate is measured; FIG. 9 is a chart showing the success rate of the reader reading interface, and the results are shown in Table 1.

Table 1 results of the experiment: tag read rate

Within the error range, when the label is directly attached to the surface of the steel bottle, the reading rate of the label is zero. However, as the distance between the two increases, the read rate of the tag increases rapidly. When the distance between the label and the steel cylinder plane is increased to 11mm, the reading rate of the label is 100%. And on the premise of keeping the reading distance unchanged, the distance between the tag and the metal box is continuously increased, and the reading rate of the tag is maximized. Therefore, the spacing distance is selected to be 11mm in this embodiment.

(2) Weighing subsystem

The invention designs a label for automatically weighing a steel cylinder, which is used for realizing automatic weighing of the steel cylinder. According to the scheme, the weight of the sulfur hexafluoride steel cylinder is measured through the label for automatically weighing the steel cylinder, the RFID card reader is combined to read the position of the electronic label for weighing the sulfur hexafluoride steel cylinder and the GPS/Beidou positioning and weighing equipment, the obtained information such as the weight, the label and the position is written into the electronic label, and the data are sent to the remote control platform through the Internet of things.

The label for automatically weighing the steel cylinder has the following specific design idea:

all RFID passive tags consist of a chip connected to an antenna. To maximize the performance of the tag, the (bi-directional) RF power conversion between the chip and the antenna needs to be optimized by impedance matching. The impedance may be expressed by a combination of impedance (R) and reactance (X). The antenna is considered as the source (Ra and Xa) and the chip as the load (Rc and Xc). Fig. 4 shows an impedance equivalent diagram of the tag antenna and the chip. Impedance matching requires that the chip and antenna impedances be "complex conjugates" of each other. The following formula is satisfied:

Ra＝Rc

Xc＝-Xc

as shown in fig. 5, which shows the equivalent circuit of self-tuning the tag, the conventional RFID chip has a single fixed impedance, and the impedance of the antenna varies with frequency, and the tag is "detuned" by changing the rf field under the influence of nearby liquids and metals. The chameleon engine can automatically complete self-tuning in time to achieve the optimal impedance matching of the antenna under the current working frequency and environmental conditions. The equivalent circuit diagram of the tag with the chameleon chip is shown in fig. 5, and the impedance of the chip is dynamically adjusted to match the changed antenna impedance. On the Magnus S chip, a set of capacitors has 32 capacitance states with a 5-bit sensor code representing the tuning setting. The specific parameters are shown in Table 2.

TABLE 2 chameleon parameters

If the antenna impedance of the tag changes, the sensor code will also change because the chameleon engine adapts to the capacitance bank, and the simulation result is shown in fig. 6. The chameleon sensor code DEC is related to the matching capacitance Cp by:

Cp＝1.9+2.06*DEC/1000

mechanical deformation of the antenna itself produces a change in the resonant frequency of the antenna and the chameleon engine adjusts to this change. The tag suspends a small piece of metal film at the tag antenna by a compressible foam. When the foam is compressed by the weight, the metal approaches the antenna structure, which in turn causes a change in impedance and sensor code. As shown in fig. 7, the results of the self-tuning load cell tag experiment show that as the weight of the measured object increases, the tag sensor code changes. From the graph, the sensor code DEC can be fitted with respect to gravity F:

DEC＝0.25*F*S+8

this gives the capacitance Cp in relation to the weight M:

Cp＝5.15*10^-5*M+1.91648

(3) remote management platform

By utilizing a front-end automatic sensing technology (the Radio Frequency Identification (RFID) subsystem and the weighing subsystem), a steel cylinder safety supervision database can be quickly and automatically established, dynamic information of a steel cylinder is tracked in real time, the technical state and the physical position of the steel cylinder are monitored, and potential safety hazards in the filling, transporting and using processes of the steel cylinder are controlled and eliminated to the maximum extent; the sulfur hexafluoride gas storage management is realized, and a high-accuracy sulfur hexafluoride gas material management mode is formed.

Example two:

the embodiment aims to provide a sulfur hexafluoride gas life cycle management method based on RFID.

A sulfur hexafluoride gas life cycle management method based on RFID utilizes the sulfur hexafluoride gas life cycle management system based on RFID, and the method comprises the following steps:

storing the basic information of the steel cylinder and the purchasing and recycling related information based on the electronic tag, and realizing information acquisition, information updating and information feedback in the electronic tag through a reader-writer and an upper computer according to a control command issued by a remote control platform;

the weight of the gas in the steel cylinder is measured in real time through the self-tuning weighing sensor tag, and the measured weight information is fed back to the remote control platform;

and the remote control platform receives the fed back data information and then performs corresponding processing to realize the management of the whole life cycle of the sulfur hexafluoride gas.

The RFID-based sulfur hexafluoride gas full-life cycle management method and system can be achieved, and have wide application prospects.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present invention has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that after reading the present invention, they can make various changes, modifications or equivalents to the specific embodiments of the present invention, but these changes, modifications or equivalents are within the protection scope of the appended claims.