CN114154601A - Temperature measurement method and device based on RFID chip, temperature measurement system and storage medium - Google Patents
Temperature measurement method and device based on RFID chip, temperature measurement system and storage medium Download PDFInfo
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- CN114154601A CN114154601A CN202111254682.5A CN202111254682A CN114154601A CN 114154601 A CN114154601 A CN 114154601A CN 202111254682 A CN202111254682 A CN 202111254682A CN 114154601 A CN114154601 A CN 114154601A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
Abstract
The invention discloses a temperature measurement method and device based on an RFID chip, a temperature measurement system and a storage medium, wherein the temperature measurement method based on a passive ultrahigh frequency RFID chip comprises the following steps: after communication connection with a passive ultrahigh frequency RFID chip is established, reading the data of a memory of the passive ultrahigh frequency RFID chip, and determining the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip; and acquiring the current reverse link frequency of the passive ultrahigh frequency RFID chip, and determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency. Therefore, the temperature measurement method based on the passive ultrahigh frequency RFID chip can be compatible with various temperature measurement environments, the detection method is simple, easy and sensitive, the temperature measurement cost can be reduced, and the working efficiency and the user experience are improved.
Description
Technical Field
The invention relates to the technical field of temperature detection, in particular to a temperature measuring method based on a passive ultrahigh Frequency RFID (Radio Frequency Identification) chip, a computer readable storage medium, a temperature measuring system and a temperature measuring device based on the passive ultrahigh Frequency RFID chip.
Background
The temperature detection can be applied to various industries, and in the adopted temperature detection method, the external power supply can be divided into active measurement and passive measurement according to the requirement.
In the related technology, most temperature measurement is active, the RFID chips with the temperature measurement function mostly adopt an active or semi-active working mode, active equipment needs to be powered by a battery, the cost of finished products is high, the battery needs to be replaced regularly, regular maintenance is needed, a small part of RFID chips with temperature sensing modules and are passive, and the use scenes of the RFID chips are greatly reduced because the temperature sensors increase the working power consumption of the chips, the sensitivity is low, and the working distance is shortened.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one purpose of the invention is to provide a temperature measurement method based on a passive ultrahigh frequency RFID chip, which is compatible with various temperature measurement environments, simple and sensitive in detection method, capable of reducing temperature measurement cost, and capable of improving working efficiency and user experience.
A second object of the invention is to propose a computer-readable storage medium.
The third purpose of the invention is to provide a first temperature measuring system.
The fourth purpose of the invention is to provide a temperature measuring device based on a passive ultrahigh frequency RFID chip.
The fifth purpose of the invention is to provide a second temperature measuring system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a temperature measurement method based on a passive ultrahigh frequency RFID chip, including the following steps: after communication connection with a passive ultrahigh frequency RFID chip is established, reading the data of a memory of the passive ultrahigh frequency RFID chip, and determining the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip; and acquiring the current reverse link frequency of the passive ultrahigh frequency RFID chip, and determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency.
According to the temperature measuring method, firstly, a communication relation between the passive ultrahigh frequency RFID chip and the reader is established, then the current reverse link frequency of the RFID chip is obtained, and then the temperature value of the RFID chip is determined according to the relation between the reverse link frequency and the temperature of the RFID chip. Therefore, the temperature measurement method based on the passive ultrahigh frequency RFID chip can be compatible with various temperature measurement environments, the detection method is simple, easy and sensitive, the temperature measurement cost can be reduced, and the working efficiency and the user experience are improved.
In some embodiments of the invention, before establishing the communication connection with the passive uhf RFID chip, the method further comprises: and determining a fitting mode, obtaining the correlation coefficient of the relation according to the fitting mode, and writing the correlation coefficient of the relation and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
In some embodiments of the invention, determining the relationship between reverse link frequency and temperature of the passive uhf RFID chip comprises: and reading the correlation coefficient of the relationship and the fitting mode, and establishing the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient of the relationship and the fitting mode.
In some embodiments of the invention, determining the relationship between reverse link frequency and temperature of the passive uhf RFID chip comprises: determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and establishing a relation between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient of the relation and the fitting mode.
In some embodiments of the present invention, the fitting manner includes at least one of a linear fitting manner, a least squares fitting manner, and a piecewise function fitting manner.
In some embodiments of the present invention, obtaining the correlation coefficient of the relationship according to the fitting manner includes: determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode; determining a test temperature, acquiring a reverse link frequency corresponding to the test temperature, and determining a correlation coefficient of the relationship according to the test temperature, the reverse link frequency corresponding to the test temperature and the function.
In some embodiments of the invention, determining the function between the reverse link frequency and the temperature of the passive uhf RFID chip from the fitting comprises: determining a first relationship between the reverse link frequency and a chip protocol, and determining a second relationship between a system-on-chip frequency and the reverse link frequency, and determining a third relationship between the system-on-chip frequency and temperature; determining a fourth relationship between the reverse link frequency and the temperature according to the first relationship, the second relationship, and the third relationship; and fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
In order to achieve the above object, a second aspect of the present invention provides a computer-readable storage medium, on which a temperature measurement program based on a passive ultrahigh frequency RFID chip is stored, and when the temperature measurement program based on the passive ultrahigh frequency RFID chip is executed by a processor, the temperature measurement method based on the passive ultrahigh frequency RFID chip according to the above embodiment is implemented.
The computer-readable storage medium of the embodiment of the invention can be compatible with various temperature measurement environments through the temperature measurement program based on the passive ultrahigh frequency RFID chip stored on the computer-readable storage medium, and the detection method is simple, easy and sensitive, and can also reduce the temperature measurement cost, improve the working efficiency and improve the user experience.
In order to achieve the above object, a third aspect of the present invention provides a temperature measurement system, where the temperature measurement system includes a memory, a processor, and a temperature measurement program based on a passive ultrahigh frequency RFID chip, where the temperature measurement program is stored in the memory and is executable on the processor, and when the processor executes the temperature measurement program based on the passive ultrahigh frequency RFID chip, the temperature measurement method based on the passive ultrahigh frequency RFID chip according to the above embodiment is implemented.
The temperature measurement system comprises the memory and the processor, the processor executes the temperature measurement program based on the passive ultrahigh frequency RFID chip stored in the memory, the temperature measurement system is compatible with various temperature measurement environments, the detection method is simple and sensitive, the temperature measurement cost can be reduced, and the working efficiency and the user experience are improved.
In order to achieve the above object, a fourth aspect of the present invention provides a temperature measuring device based on a passive uhf RFID chip, the device including: the first determining module is used for reading the memory data of the passive ultrahigh frequency RFID chip after establishing communication connection with the passive ultrahigh frequency RFID chip and determining the relation between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip; the acquisition module is used for acquiring the current reverse link frequency of the passive ultrahigh frequency RFID chip; and the second determining module is used for determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency.
The temperature measuring device comprises a first determining module, an obtaining module and a second determining module, wherein after a communication relation between a passive ultrahigh frequency RFID chip and a reader is established, the obtaining module obtains the current reverse link frequency of the RFID chip, and then the temperature value of the RFID chip is determined through the second determining module according to the relation between the reverse link frequency of the RFID chip determined by the first determining module and the temperature value of the RFID chip. Therefore, the temperature measuring device based on the passive ultrahigh frequency RFID chip can be compatible with various temperature measuring environments, the detection method is simple, easy and sensitive, the temperature measuring cost can be reduced, and the working efficiency and the user experience are improved.
In some embodiments of the present invention, the first determining module is further configured to determine a fitting manner before establishing a communication connection with the passive uhf RFID chip; obtaining a correlation coefficient of the relation according to the fitting mode; and writing the correlation coefficient of the relationship and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
In some embodiments of the present invention, the first determining module is further configured to read a correlation coefficient of the relationship and the fitting manner, and establish a relationship between a reverse link frequency of the passive uhf RFID chip and a temperature according to the correlation coefficient of the relationship and the fitting manner.
In some embodiments of the present invention, the first determining module is further configured to determine a fitting manner, obtain a correlation coefficient of the relationship according to the fitting manner, and establish a relationship between a reverse link frequency of the passive uhf RFID chip and a temperature according to the correlation coefficient of the relationship and the fitting manner.
In some embodiments of the present invention, obtaining the correlation coefficient of the relationship according to the fitting manner includes: determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode; determining a test temperature, acquiring a reverse link frequency corresponding to the test temperature, and determining a correlation coefficient of the relationship according to the test temperature, the reverse link frequency corresponding to the test temperature and the function.
In some embodiments of the invention, determining the function between the reverse link frequency and the temperature of the passive uhf RFID chip from the fitting comprises: determining a first relationship between the reverse link frequency and a chip protocol, and determining a second relationship between a system-on-chip frequency and the reverse link frequency, and determining a third relationship between the system-on-chip frequency and temperature; determining a fourth relationship between the reverse link frequency and the temperature according to the first relationship, the second relationship, and the third relationship; and fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
In order to achieve the above object, an embodiment of a fifth aspect of the present invention provides a temperature measurement system, where the temperature measurement system includes a passive ultrahigh frequency RFID chip and the temperature measurement device in the above embodiment, and the temperature measurement device communicates with the passive ultrahigh frequency RFID chip to obtain a temperature value of the passive ultrahigh frequency RFID chip.
The temperature measuring system provided by the embodiment of the invention can be compatible with various temperature measuring environments through the temperature measuring device in the embodiment, the detection method is simple, easy and sensitive, the temperature measuring cost can be reduced, and the working efficiency and the user experience are improved.
Additional aspects and advantages 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
FIG. 1 is a flow chart of a passive UHF RFID chip based thermometry method according to one embodiment of the present invention;
FIG. 2 is a flow chart of a passive UHF RFID chip based thermometry method according to one embodiment of the invention;
FIG. 3 is a flow chart of a passive UHF RFID chip based thermometry method according to one embodiment of the invention;
FIG. 4 is a flow chart of a passive UHF RFID chip based thermometry method according to one embodiment of the present invention;
FIG. 5 is a block diagram of a thermometry system according to one embodiment of the present invention;
FIG. 6 is a block diagram of a passive UHF RFID chip based temperature measurement device according to an embodiment of the invention;
FIG. 7 is a block diagram of a thermometry system according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a temperature measurement method and device, a temperature measurement system, and a storage medium based on an RFID chip according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a flow chart of a passive uhf RFID chip-based thermometry method according to an embodiment of the present invention.
As shown in fig. 1, the invention provides a temperature measurement method based on a passive ultrahigh frequency RFID chip, which comprises the following steps:
and S10, after the communication connection with the passive ultrahigh frequency RFID chip is established, reading the memory data of the passive ultrahigh frequency RFID chip, and determining the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
It should be noted that, in the temperature measurement method in this embodiment, the passive ultrahigh frequency RFID chip can be in communication connection with the ultrahigh frequency reader, so as to read the reverse link frequency of the passive ultrahigh frequency RFID chip through the ultrahigh frequency reader, and then detect the current temperature according to the relationship between the reverse link frequency and the temperature.
Specifically, since the passive uhf RFID chip needs to be connected to the uhf reader, the passive uhf RFID chip and the uhf reader in this embodiment should conform to a related communication protocol so that they can be connected in communication, and optionally, the communication protocol may include ISO 18000-6C, ISO 18047-6, GB _ T _29768, and the like. In addition, the passive ultrahigh frequency RFID chip and the ultrahigh frequency reader also need to have functions of reading and writing a memory to ensure smooth reading, writing and storing of the detection data and/or the frequency data. It can be understood that the temperature range measured by the temperature measurement method in this embodiment is within the working temperature range of the passive ultrahigh frequency RFID chip, so that the temperature measurement method can detect more accurate temperature, and meanwhile, the passive ultrahigh frequency RFID chip can work normally.
Optionally, the uhf reader in this embodiment has the capability of reading the chip reverse link value, which can be obtained by, but not limited to, a reader, an oscilloscope, and a spectrometer.
Because the relationship between the corresponding reverse link frequency and the temperature is different in different communication protocols, the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip is further determined after the communication connection between the passive ultrahigh frequency RFID chip and the ultrahigh frequency reader is established. More specifically, taking international GB _ T _29768 as an example, the reverse link frequency BLF is 1/TpriWherein, TpriFor the reference clock period of the reverse link, ideally, the reverse link frequency BLF is 1/Tpri＝f0K is 320kHz x K, K is the reverse link rate factor, determined by the uhf RFID protocol, f0Reference frequency f of international protocol GB _ T _29768 as reference frequency of reverse link frequency0The value is 320kHz, which can be obtained by dividing the system clock frequency of the chip.
In some embodiments of the present invention, as shown in fig. 2, before establishing a communication connection with the passive uhf RFID chip, the thermometry method further includes: s101, determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and writing the correlation coefficient of the relation and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
It should be noted that although the relationship between the reverse link frequency and the temperature corresponding to different communication protocols is different, the reverse link frequencies of different communication protocols may all be represented by a formula with the same format, where the formula may be BLF (t) (f) (x) x f (y) x f (z), where f (x) is a function of the RFID air interface protocol, and a value of f (x) is related to a protocol followed by the uhf RFID tag, is a fixed value or a set of fixed values, and is not affected by the environment; (y) is a function of the system frequency and the BLF reference frequency, and is related to chip design, and the value of the chip of the same model is fixed and is not influenced by the environment; f (z) is a function of the reference frequency and temperature, in which function the temperature is the independent variable and the reference frequency is the dependent variable.
Specifically, the functional relationship between the reverse link frequency and time, that is, BLF ═ f (t), may be fitted by different fitting methods, and the different fitting methods have different correlation coefficients, and the accuracy of the different fitting methods for temperature measurement is also different. In some embodiments, the fitting manner in this embodiment may include: at least one of a linear fit, a least squares fit, and a piecewise function fit.
More specifically, the linear fitting manner may be BLF (t) a × t + b, where a and b are correlation coefficients; the least square fitting method may be BLF (t) a × t2+ b × t + c, where a, b, and c are correlation coefficients; the piecewise function fitting may be in the form of
Wherein f is1(t)、f2(t)……fn(t) and t0、t1……tnIs a correlation coefficient, wherein f1(t)、f2(t)……fn(t) fixed temperature, t0、t1……tnThe reverse link frequency. After determining the correlation coefficients involved in each fitting mode, the embodiment may match the correlation coefficients into the fitting modes, and write each fitting mode into the memory of the passive ultra-high-screen RFID chip
After storing each of the fitting patterns and its corresponding correlation coefficient in memory, then in some embodiments, determining the relationship between the reverse link frequency and temperature of the passive uhf RFID chip comprises: and reading the correlation coefficient and the fitting mode of the relationship, and establishing the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient and the fitting mode of the relationship.
Specifically, in this embodiment, determining the relationship between the reverse link frequency and the temperature may initialize the chip temperature measurement portion in the wafer test stage, that is, determining the relationship between the reverse link frequency and the temperature of the passive uhf RFID chip in the wafer test stage. More specifically, the fitting manner may be read according to the accuracy requirement, and three fitting manners in the above embodiments are taken as examples, where the fitting accuracy of the piecewise function is the highest, and a plurality of test points need to be tested at the same time; the fitting precision of linear fitting is bottom-crossed, but the number of points to be tested is small, and the initialization efficiency is highest.
After the correlation coefficients matched with the fitting modes are determined and the fitting formula of the exact coefficients is obtained, in step S10, after the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip is determined, the correlation coefficients and the fitting modes may be read first, and then the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip is established according to the read correlation coefficients and the fitting modes. For example, linear fitting requires at least two sets of "temperature-BLF" values to determine the correlation coefficients a and b, and the value of the "temperature-BLF" value can be selected according to the particular application scenario. For example, the temperature measuring interval is 0-45 ℃, and the output frequency f of the test chip can be respectively 10 DEG C1(ii) a Testing the chip output frequency f at 25 DEG C2. The testing equipment calculates the correlation coefficients a and b according to the formula BLF (t) a x t + b, and writes the correlation coefficients a and b into the RFID chip memory according to a specified format.
It should be noted that the fitting manner in this embodiment may further include other fitting manners besides the three fitting manners described above, and in this embodiment, when the fitting manner is used for temperature detection, different fitting manners may be simultaneously used, for example, different fitting manners may be selected according to the range of the reverse link frequency for temperature detection.
In some embodiments of the present invention, determining a relationship between reverse link frequency and temperature for a passive uhf RFID chip comprises: and determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and establishing the relation between the reverse link frequency of the passive ultrahigh frequency RFID chip and the temperature according to the correlation coefficient of the relation and the fitting mode.
Specifically, the relationship between the reverse link frequency and the temperature of the passive uhf RFID chip in this embodiment can be determined in an uhf RFID reader. More specifically, the fitting manner may be determined according to requirements, and since the embodiment has a plurality of fitting manners that may be selected when determining the relationship between the reverse link frequency and the temperature of the passive uhf RFID chip, it may be understood that different fitting manners may be adopted for different communication protocols, and of course, a plurality of fitting manners may also be adopted for combination. The relation between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip can be established through the determined fitting mode of the correlation coefficient, then the reverse link frequency is directly detected in the subsequent temperature measurement process, and the corresponding temperature can be obtained according to the fitting formula.
Fitting by least squares method, for example, according to the formula BLF (t) a × t2At least three groups of 'temperature-BLF' values are needed to determine the values of a, b and c, and the 'temperature-BLF' value can be selected according to specific application scenes. Testing BLF values of passive ultrahigh frequency RFID chips at different temperatures, for example, the temperature measuring interval is 0-45 ℃, and when the temperature measuring interval is 10 ℃, the passive ultrahigh frequency RFID chips send instructions to obtain or calculate the BLF values; at 25 ℃, the chip sends an instruction to obtain or calculate a BLF value, and at 40 ℃ the chip sends an instruction to obtain or calculate a BLF value. The UHF RFID reader then writes the coefficient values into the memory by sending a write command. That is, in this embodiment, the actual value of the reverse link frequency is obtained by the reader through the carrier of the chip, and then the correlation coefficient of each fitting manner is obtained according to the actual value.
S20, obtaining the current reverse link frequency of the passive ultrahigh frequency RFID chip, and determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency.
Specifically, after the determination of the fitting mode correlation coefficient is completed and the relationship between the passive ultrahigh frequency RFID chip and the temperature is determined, the current reverse link frequency of the passive ultrahigh frequency RFID chip in the working process can be acquired, and then the temperature value of the passive ultrahigh frequency RFID chip is determined according to the relationship between the passive ultrahigh frequency RFID chip and the temperature.
In some embodiments of the present invention, as shown in fig. 3, obtaining the correlation coefficient of the relationship according to the fitting manner includes:
s301, determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode. S302, determining a test temperature, acquiring a reverse link frequency corresponding to the test temperature, and determining a correlation coefficient of a relation according to the test temperature, the reverse link frequency corresponding to the test temperature and a function.
Specifically, for example, according to the formula BLF (f) (t) a × t2+ b × t + c, at least three groups of "temperature-BLF" values are required to determine the values a, b, and c, and the value of "temperature-BLF" can be selected according to a specific application scenario. Testing BLF values of passive ultrahigh frequency RFID chips at different temperatures, for example, the temperature measuring interval is 0-45 ℃, and when the temperature measuring interval is 10 ℃, the passive ultrahigh frequency RFID chips send instructions to obtain or calculate the BLF values; at 25 ℃, the chip sends an instruction to obtain or calculate a BLF value, and at 40 ℃ the chip sends an instruction to obtain or calculate a BLF value. Then, three values a, b and c are determined according to the corresponding relations between three different sets of BLFs and temperatures, so as to determine a fitting formula BLF (f) (t) a × t2+ b × t + c. So that the corresponding temperature can be calculated according to the fitting formula in the subsequent temperature measurement process.
In this embodiment, as shown in fig. 4, determining the function between the reverse link frequency and the temperature of the passive uhf RFID chip from the fitting method includes: s401, a first relation between the reverse link frequency and the chip protocol is determined, a second relation between the system-on-chip frequency and the reverse link frequency is determined, and a third relation between the system-on-chip frequency and the temperature is determined. A fourth relationship between reverse link frequency and temperature is determined based on the first relationship, the second relationship, and the third relationship S402. And S403, fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
Specifically, since the relationship between the reverse link frequency and the temperature is different for different communication protocols, after the communication connection between the passive uhf RFID chip and the uhf reader is established, the first relationship between the reverse link frequency and the chip protocol is determined, for example, the international GB _ T _29768 protocol, where the reverse link frequency BLF is 1/TpriWhere Tpri is the reference clock period for the reverse link. And alsoA second relationship between the system-on-chip frequency and the reverse link frequency is determined, and a third relationship between the system-on-chip frequency and temperature is determined. Specifically, since the reverse link frequency can be obtained by dividing the frequency of the chip system, and the chip system frequency has a certain functional relationship with the temperature, the chip system frequency is higher if the temperature is higher. Through the first to third relations, a fourth relation between the reverse link frequency and the temperature can be determined, where the fourth relation may be BLF (t) mentioned in the above embodiment, so that the fourth relation may be fitted to obtain a function between the reverse link frequency and the temperature of the passive uhf RFID chip.
In conclusion, the temperature measurement method based on the passive ultrahigh frequency RFID chip can be compatible with various temperature measurement environments, is simple and sensitive, and can reduce the temperature measurement cost and improve the working efficiency and the user experience.
Further, the present invention provides a computer readable storage medium, on which a temperature measurement program based on a passive ultrahigh frequency RFID chip is stored, and when the temperature measurement program based on the passive ultrahigh frequency RFID chip is executed by a processor, the temperature measurement method based on the passive ultrahigh frequency RFID chip in the above embodiments is implemented.
The computer-readable storage medium of the embodiment of the invention can be compatible with various temperature measurement environments through the temperature measurement program based on the passive ultrahigh frequency RFID chip stored on the computer-readable storage medium, and the detection method is simple, easy and sensitive, and can also reduce the temperature measurement cost, improve the working efficiency and improve the user experience.
FIG. 5 is a block diagram of a thermometry system according to one embodiment of the present invention.
Further, as shown in fig. 5, the present invention provides a temperature measurement system 100, where the temperature measurement system 100 includes a memory 101, a processor 102, and a temperature measurement program based on a passive uhf RFID chip, which is stored in the memory 101 and can be run on the processor 102, and when the processor 102 executes the temperature measurement program based on the passive uhf RFID chip, the temperature measurement method based on the passive uhf RFID chip in the above embodiment is implemented.
The temperature measurement system comprises the memory and the processor, the processor executes the temperature measurement program based on the passive ultrahigh frequency RFID chip stored in the memory, the temperature measurement system is compatible with various temperature measurement environments, the detection method is simple and sensitive, the temperature measurement cost can be reduced, and the working efficiency and the user experience are improved.
FIG. 6 is a block diagram of a passive UHF RFID chip based thermometry apparatus according to one embodiment of the present invention.
Further, as shown in fig. 6, the present invention provides a temperature measuring device 200 based on a passive uhf RFID chip, where the temperature measuring device 200 includes a first determining module 201, an obtaining module 202, and a second determining module 203.
The first determining module 201 is configured to, after establishing communication connection with a passive ultrahigh frequency RFID chip, read memory data of the passive ultrahigh frequency RFID chip, and determine a relationship between a reverse link frequency and a temperature of the passive ultrahigh frequency RFID chip; the obtaining module 202 is configured to obtain a current reverse link frequency of the passive ultrahigh frequency RFID chip; the second determining module 203 is configured to determine a temperature value of the passive uhf RFID chip according to the relationship and the current reverse link frequency.
In some embodiments of the present invention, before establishing the communication connection with the passive uhf RFID chip, the first determining module 201 is further configured to: and determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and writing the correlation coefficient of the relation and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
In some embodiments of the present invention, the first determining module 201 is specifically configured to: and reading the correlation coefficient and the fitting mode of the relationship, and establishing the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient and the fitting mode of the relationship.
In some embodiments of the present invention, the first determining module 201 is specifically configured to: and determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and establishing the relation between the reverse link frequency of the passive ultrahigh frequency RFID chip and the temperature according to the correlation coefficient of the relation and the fitting mode.
In some embodiments of the present invention, the fitting manner includes at least one of a linear fitting manner, a least squares fitting manner, and a piecewise function fitting manner.
In some embodiments of the present invention, the first determining module 201 is specifically configured to: determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode; and determining the test temperature, acquiring the reverse link frequency corresponding to the test temperature, and determining the correlation coefficient of the relation according to the test temperature, the reverse link frequency corresponding to the test temperature and the function.
In some embodiments of the present invention, the first determining module 201 is specifically configured to: determining a first relationship between a reverse link frequency and a chip protocol, and determining a second relationship between a system-on-chip frequency and a reverse link frequency, and determining a third relationship between the system-on-chip frequency and a temperature; determining a fourth relationship between reverse link frequency and temperature based on the first relationship, the second relationship, and the third relationship; and fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
It should be noted that, for a specific implementation of the temperature measuring device based on the passive ultrahigh frequency RFID chip in the embodiment of the present invention, reference may be made to the specific implementation of the temperature measuring method based on the passive ultrahigh frequency RFID chip in the foregoing embodiment, and details are not described here again.
In conclusion, the temperature measuring device based on the passive ultrahigh frequency RFID chip can be compatible with various temperature measuring environments, the detection method is simple and sensitive, the temperature measuring cost can be reduced, and the working efficiency and the user experience are improved.
FIG. 7 is a block diagram of a thermometry system according to another embodiment of the present invention.
Further, as shown in fig. 7, the present invention provides a temperature measurement system 300, where the temperature measurement system 300 includes a passive uhf RFID chip 301 and the temperature measurement device 200 according to the above embodiment, and the temperature measurement device 200 communicates with the passive uhf RFID chip 301 to obtain a temperature value of the passive uhf RFID chip 301.
The temperature measuring system provided by the embodiment of the invention can be compatible with various temperature measuring environments through the temperature measuring device in the embodiment, the detection method is simple, easy and sensitive, the temperature measuring cost can be reduced, and the working efficiency and the user experience are improved.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second", and the like used in the embodiments of the present invention 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 in the embodiments. Thus, a feature of an embodiment of the present invention that is defined by the terms "first," "second," etc. may explicitly or implicitly indicate that at least one of the feature is included in the embodiment. In the description of the present invention, the word "plurality" means at least two or two and more, such as two, three, four, etc., unless specifically limited otherwise in the examples.
In the present invention, unless otherwise explicitly stated or limited by the relevant description or limitation, the terms "mounted," "connected," and "fixed" in the embodiments are to be understood in a broad sense, for example, the connection may be a fixed connection, a detachable connection, or an integrated connection, and it may be understood that the connection may also be a mechanical connection, an electrical connection, etc.; of course, they may be directly connected or indirectly connected through intervening media, or they may be interconnected within one another or in an interactive relationship. Those of ordinary skill in the art will understand the specific meaning of the above terms in the present invention according to their specific implementation.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (16)
1. A temperature measurement method based on a passive ultrahigh frequency RFID chip is characterized by comprising the following steps:
after communication connection with a passive ultrahigh frequency RFID chip is established, reading the data of a memory of the passive ultrahigh frequency RFID chip, and determining the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip;
and acquiring the current reverse link frequency of the passive ultrahigh frequency RFID chip, and determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency.
2. The passive uhf RFID chip-based thermometry method of claim 1, wherein prior to establishing a communication link with the passive uhf RFID chip, the method further comprises:
determining a fitting mode;
obtaining a correlation coefficient of the relation according to the fitting mode; and
and writing the correlation coefficient of the relationship and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
3. The passive UHF RFID chip-based thermometry method of claim 2, wherein determining the relationship between reverse link frequency and temperature of the passive UHF RFID chip comprises:
and reading the correlation coefficient of the relationship and the fitting mode, and establishing the relationship between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient of the relationship and the fitting mode.
4. The passive UHF RFID chip-based thermometry method of claim 1, wherein determining the relationship between reverse link frequency and temperature of the passive UHF RFID chip comprises:
determining a fitting mode, obtaining a correlation coefficient of the relation according to the fitting mode, and establishing a relation between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the correlation coefficient of the relation and the fitting mode.
5. The passive UHF RFID chip-based thermometry method of any one of claims 2-4, wherein the fitting mode comprises at least one of a linear fitting mode, a least squares fitting mode, and a piecewise function fitting mode.
6. The passive UHF RFID chip-based thermometry method according to any one of claims 2-4, wherein obtaining the correlation coefficient of the relationship according to the fitting method comprises:
determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode;
determining a test temperature, acquiring a reverse link frequency corresponding to the test temperature, and determining a correlation coefficient of the relationship according to the test temperature, the reverse link frequency corresponding to the test temperature and the function.
7. The passive UHF RFID chip based thermometry method of claim 6, wherein determining the function between reverse link frequency and temperature of the passive UHF RFID chip from the fitting comprises:
determining a first relationship between the reverse link frequency and a chip protocol, and determining a second relationship between a system-on-chip frequency and the reverse link frequency, and determining a third relationship between the system-on-chip frequency and temperature;
determining a fourth relationship between the reverse link frequency and the temperature according to the first relationship, the second relationship, and the third relationship;
and fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
8. A computer-readable storage medium, wherein a passive uhf RFID chip-based thermometry program is stored thereon, and when executed by a processor, the passive uhf RFID chip-based thermometry program implements the passive uhf RFID chip-based thermometry method according to any one of claims 1 to 7.
9. A temperature measurement system is characterized by comprising a memory, a processor and a temperature measurement program which is stored on the memory and can run on the processor, wherein when the processor executes the temperature measurement program based on the passive ultrahigh frequency RFID chip, the temperature measurement method based on the passive ultrahigh frequency RFID chip is realized according to any one of claims 1 to 7.
10. A temperature measuring device based on a passive ultrahigh frequency RFID chip is characterized in that the device comprises:
the first determining module is used for reading the memory data of the passive ultrahigh frequency RFID chip after establishing communication connection with the passive ultrahigh frequency RFID chip and determining the relation between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip;
the acquisition module is used for acquiring the current reverse link frequency of the passive ultrahigh frequency RFID chip;
and the second determining module is used for determining the temperature value of the passive ultrahigh frequency RFID chip according to the relationship and the current reverse link frequency.
11. The passive uhf RFID chip-based thermometry apparatus of claim 10, wherein the first determining module is further configured to determine a fitting pattern before establishing a communication link with the passive uhf RFID chip; obtaining a correlation coefficient of the relation according to the fitting mode; and writing the correlation coefficient of the relationship and the fitting mode into a memory of the passive ultrahigh frequency RFID chip.
12. The passive uhf RFID chip-based temperature measurement device of claim 11, wherein the first determining module is further configured to read a correlation coefficient of the relationship and the fitting method, and establish a relationship between a reverse link frequency of the passive uhf RFID chip and a temperature according to the correlation coefficient of the relationship and the fitting method.
13. The passive uhf RFID chip-based temperature measurement device of claim 10, wherein the first determining module is further configured to determine a fitting manner, obtain the correlation coefficient of the relationship according to the fitting manner, and establish the relationship between the reverse link frequency and the temperature of the passive uhf RFID chip according to the correlation coefficient of the relationship and the fitting manner.
14. The passive uhf RFID chip-based thermometry apparatus of any one of claims 11-13, wherein obtaining the correlation coefficient of the relationship from the fitting comprises:
determining a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip according to the fitting mode;
determining a test temperature, acquiring a reverse link frequency corresponding to the test temperature, and determining a correlation coefficient of the relationship according to the test temperature, the reverse link frequency corresponding to the test temperature and the function.
15. The passive uhf RFID chip-based thermometry device of claim 14, wherein determining the function between the reverse link frequency and the temperature of the passive uhf RFID chip from the fitting comprises:
determining a first relationship between the reverse link frequency and a chip protocol, and determining a second relationship between a system-on-chip frequency and the reverse link frequency, and determining a third relationship between the system-on-chip frequency and temperature;
determining a fourth relationship between the reverse link frequency and the temperature according to the first relationship, the second relationship, and the third relationship;
and fitting the fourth relation according to the fitting mode to obtain a function between the reverse link frequency and the temperature of the passive ultrahigh frequency RFID chip.
16. A thermometry system, comprising:
a passive ultrahigh frequency RFID chip;
the thermometric device of any of claims 10-15, the thermometric device in communication with the passive uhf RFID chip to obtain a temperature value for the passive uhf RFID chip.
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| CN202111254682.5A CN114154601A (en) | 2021-10-27 | 2021-10-27 | Temperature measurement method and device based on RFID chip, temperature measurement system and storage medium |
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| CN202111254682.5A CN114154601A (en) | 2021-10-27 | 2021-10-27 | Temperature measurement method and device based on RFID chip, temperature measurement system and storage medium |
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