UHF frequency band RFID glass tube temperature measurement label

Abstract

The utility model discloses a UHF frequency band RFID glass tube temperature measurement label comprising a toughened glass tube, a tuning coil, an ultrahigh frequency RFID temperature measurement circuit module and a ceramic rod are arranged in the toughened glass tube along the axial direction in sequence, and a main radiation coil is wound on the ceramic rod. The ultrahigh frequency RFID temperature measurement circuit module comprises a PCB, a temperature measurement chip and an impedance matching capacitor. According to the scheme, the ceramic rod is combined with the main radiation coil, the dielectric constant of the ceramic rod is utilized, efficient radiation is achieved through the short main radiation coil, and the overall size of the glass tube is reduced; the components are axially arranged to optimize the electromagnetic environment, and stable signal transmission and accurate temperature measurement are guaranteed; an impedance matching capacitor in the ultrahigh frequency RFID temperature measurement circuit module adjusts coil impedance, perfect matching with a chip is achieved, signal loss is reduced, the signal transmission efficiency is remarkably improved, the tag achieves long-distance communication and temperature measurement in the UHF frequency band, and the scene requirements of animal internal temperature measurement, laboratory monitoring and the like are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic tag technical field, concretely relates to a UHF frequency band RFID glass tube temperature measurement label. BACKGROUND

[0002] In the field of RFID technology application, the conventional glass tube label mostly adopts 125KHz and 134.2KHz low frequency band.This kind of low frequency animal biological glass tube label, internal structure is mainly composed of spiral coil, magnet bar and low frequency RFID chip.Because its reading distance is limited within 10CM, must pass through the read-write ware close contact label to obtain chip data, this makes in the scene needing to continuously monitor temperature data, data acquisition operation is extremely inconvenient, difficult to satisfy real-time, efficient monitoring demand.

[0003] In recent years, along with the wide application of passive wireless UHF ultra-high frequency RFID temperature measurement technology, in the field such as animal body temperature measurement, laboratory temperature monitoring, the demand for small glass tube label is increasing day by day.However, the conventional spiral coil, magnet bar and ultra-high frequency RFID temperature measurement chip are combined, and remote temperature measurement in UHF ultra-high frequency band cannot be realized.Therefore, an UHF frequency band RFID glass tube temperature measurement label is urgently needed. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a kind of UHF frequency band RFID glass tube temperature measurement label.

[0005] The utility model discloses a kind of UHF frequency band RFID glass tube temperature measurement label, including toughened glass tube, further include: in the toughened glass tube inside along its axial direction sequentially arranged tuning coil, ultra-high frequency RFID temperature measurement circuit module and ceramic rod, main radiating coil is wound on the ceramic rod;

[0006] The ultra-high frequency RFID temperature measurement circuit module includes PCB board and the ultra-high frequency RFID temperature measurement chip and impedance matching capacitor electrically connected on the PCB board;The tuning coil, main radiating coil are electrically connected with the PCB board respectively.

[0007] As a further improvement of the utility model, it further includes counterweight metal block, the counterweight metal block is placed in the toughened glass tube, and is fixedly installed at the one end of the tuning coil away from the PCB board.

[0008] As a further improvement of the utility model, the one side of the PCB board is electrically connected with the ultra-high frequency RFID temperature measurement chip and the tuning coil, the other side of the PCB board is connected and fixed with the ceramic rod, and the main radiating coil is wound on the ceramic rod;

[0009] The heat-conducting sealant is filled in the tempered glass tube corresponding to the end of the ceramic rod away from the PCB board, and is used for fixing the ceramic rod, the PCB board connected with the ceramic rod and the main radiation coil.

[0010] As a further improvement of the utility model, the inner diameter of the main radiation coil is matched with the outer diameter of the ceramic rod, and the length of the main radiation coil is matched with the length of the ceramic rod.

[0011] As a further improvement of the utility model, the diameter and the pitch of the main radiation coil and the tuning coil are same.

[0012] As a further improvement of the utility model, the dielectric constant of the ceramic rod is 12±4.

[0013] As a further improvement of the utility model, the diameter of the tempered glass tube is 2.5mm-3.5mm, and the length of the tempered glass tube is 15mm-23mm.

[0014] As a further improvement of the utility model, the number of turns of the main radiation coil is greater than the number of turns of the tuning coil.

[0015] As a further improvement of the utility model, the impedance matching capacitor is used for adjusting the impedance of the main radiation coil and the tuning coil, so as to realize the impedance matching with the ultra-high frequency RFID temperature measuring chip.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a kind of temperature measuring labels, which comprises tempered glass tube, ceramic rod, main radiation coil, tuning coil, PCB board, impedance matching capacitor and ultra-high frequency RFID temperature measuring circuit module, and the main radiation coil is arranged in the tempered glass tube along the axial direction.

[0018] The utility model discloses a kind of temperature measuring labels, which comprises tempered glass tube, ceramic rod, main radiation coil, tuning coil, PCB board, impedance matching capacitor and ultra-high frequency RFID temperature measuring circuit module, and the main radiation coil is arranged in the tempered glass tube along the axial direction.

[0019] The utility model discloses a ultrahigh frequency RFID temperature measurement circuit module is set up, and the PCB board is used as the carrier to realize the electric connection of each element, and the ultrahigh frequency RFID temperature measurement chip is the core processing unit, and the impedance matching capacitor is adjusted the impedance of main radiation coil and tuning coil, realizes the perfect matching with chip. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure schematic diagram of the UHF frequency band RFID glass tube temperature measurement label of an embodiment of the utility model is disclosed;

[0021] Figure 2 The structure schematic diagram of the UHF frequency band RFID glass tube temperature measurement label of an embodiment of the utility model is disclosed.

[0022] In the drawing,

[0023] 1, toughened glass tube;2, ceramic rod;3, main radiation coil;4, PCB board;41, impedance matching capacitor;5, ultrahigh frequency RFID temperature measurement chip;6, tuning coil;7, counterweight metal block. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of the utility model protection.

[0025] In the description of the utility model, it is necessary to explain that the orientation or position relation of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it can not be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and can not be understood as indicative or implied relative importance.

[0026] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication, for ordinary skilled in the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0027] The utility model is further described in detail below in combination with the drawings:

[0028] As Figure 1 As shown in a kind of UHF frequency band RFID glass tube temperature measuring label provided by the utility model, including toughened glass tube 1, ceramic rod 2, main radiation coil 3, ultra-high frequency RFID temperature measuring circuit module and tuning coil 6, wherein, tuning coil 6, ultra-high frequency RFID temperature measuring circuit module and ceramic rod 2 are sequentially arranged in toughened glass tube 1 along the axial direction of toughened glass tube 1, and main radiation coil 3 is wound on ceramic rod 2;Ultra-high frequency RFID temperature measuring circuit module includes PCB 4, impedance matching capacitor 41 and ultra-high frequency RFID temperature measuring chip 5, and impedance matching capacitor 41 and ultra-high frequency RFID temperature measuring chip 5 are electrically connected on PCB 4.Impedance matching capacitor 41 is used to adjust the impedance of main radiation coil 3 and tuning coil 6, to realize the impedance matching with ultra-high frequency RFID temperature measuring chip 5.

[0029] In this embodiment, by adopting the mode that ceramic rod 2 is combined with main radiation coil 3, the dielectric constant of ceramic rod 2 is utilized, so that shorter main radiation coil 3 can generate the radiation effect of longer coil under the same excitation condition, thereby facilitating the size reduction of toughened glass tube 1 as a whole, and the performance of the glass tube temperature measuring label can also be ensured;By sequentially arranging tuning coil 6, ultra-high frequency RFID temperature measuring circuit module and ceramic rod 2 in toughened glass tube 1 along the axial direction, this layout makes each component perform its own function and does not interfere with each other, and the three components are orderly arranged, which optimizes the internal electromagnetic environment and ensures the stability of signal transmission and the accuracy of temperature measuring function, laying a foundation for realizing long-distance temperature measurement;By arranging ultra-high frequency RFID temperature measuring circuit module, PCB 4 is used as a carrier to realize the electrical connection of each element, ultra-high frequency RFID temperature measuring chip 5 is a core processing unit, and impedance matching capacitor 41 adjusts the impedance of main radiation coil 3 and tuning coil 6 to realize perfect matching with the chip.This effectively reduces the reflection and loss of signal in the transmission process, greatly improves the signal transmission efficiency, and enables the label to realize longer distance communication and temperature measurement under UHF frequency band.

[0030] Specifically:

[0031] As Figure 1As shown in the above embodiment, preferably, the one side of the PCB board 4 is electrically connected with the ultra-high frequency RFID temperature measuring chip 5 and the tuning coil 6, the other side of the PCB board 4 is connected and fixed with the ceramic rod 2, and the main radiation coil 3 is wound on the ceramic rod 2. In actual installation, the end of the steel glass tube 1 corresponding to the ceramic rod 2 away from the PCB board 4 is filled with a heat-conducting sealant, which is used to fix the ceramic rod 2 and the PCB board 4 and the main radiation coil 3 connected therewith. That is, in the embodiment, the fixation of the ceramic rod 2 and the whole tag is realized by filling the heat-conducting sealant in the steel glass tube 1 corresponding to the end of the ceramic rod 2 away from the PCB board 4, so that the ceramic rod 2 cannot shake in the steel glass tube 1. At the same time, since the steel glass tube 1 is sealed in a vacuum state, the heat conduction effect can also be achieved.

[0032] In the above embodiment, preferably, the heat-conducting sealant is partially sealed in the steel glass tube 1, which can significantly reduce the electromagnetic interference caused by the mismatch between the dielectric constant of the sealant and the characteristics of the coil compared with the full sealing mode. Since the dielectric constant of the sealant is low, the full sealing mode can uncontrollably affect the inductance, capacitance and other parameters of the short coil, thereby interfering with the resonant frequency and impedance matching performance of the coil. The partial sealing mode can avoid the direct contact between a large amount of sealant and the short coil, thereby minimizing the interference with the electromagnetic performance of the tag, ensuring the stable operation of the tag in the UHF frequency band, and guaranteeing the accuracy and reliability of the signal transmission and temperature measurement functions.

[0033] In the above embodiment, preferably, the inner diameter of the main radiation coil 3 is matched with the outer diameter of the ceramic rod 2, and the length of the main radiation coil 3 is matched with the length of the ceramic rod 2. At the same time, the number of turns of the main radiation coil 3 is greater than that of the tuning coil 6. In the embodiment, the main radiation coil 3 is the main radiation body, and the tuning coil 6 is used to adjust the resonant frequency of the tag. In different application scenarios, the number of turns of the tuning coil 6 is different. For example, in a glass tube temperature measuring tag product with a diameter of 3.5 mm and a length of 15 mm, the inner diameter of the main radiation coil 3 and the tuning coil 6 is 2.4 mm, the coil pitch is 0.5 mm, the number of turns of the main radiation coil 3 is 9.5, the number of turns of the tuning coil 6 is 2 when the tag is applied in a culture dish, and the number of turns of the tuning coil 6 is 4 when the tag is applied in pig temperature measurement.

[0034] In the above embodiment, preferably, the diameter and the pitch of the main radiation coil 3 and the tuning coil 6 are the same

[0035] In the above embodiment, preferably, the dielectric constant of the ceramic rod 2 is 12±4, and the outer side of the ceramic rod 2 is sleeved with the main radiation coil 3. Based on the dielectric constant of the ceramic rod 2, the size of the steel glass tube 1 can be reduced as a whole, and the performance of the glass tube temperature measuring tag can also be ensured.

[0036] In the above embodiments, preferably, the diameter of the tempered glass tube 1 is 2.5mm-3.5mm, and the length of the tempered glass tube 1 is 15mm-23mm. In this embodiment, the tempered glass tube 1 preferably has a diameter of 3.5mm and a length of 15mm. This allows the glass tube temperature tag of this embodiment to be injected into an animal for animal identification and full life-cycle management. Readers can be placed at feeding and drinking locations for body temperature monitoring. In the laboratory, the glass tube temperature tag can be placed in experimental glass tubes or petri dishes to monitor and record the temperature in real time during the experiment.

[0037] In the above embodiment, preferably, the impedance matching capacitor 41 is a parallel capacitor electrically connected to the PCB board 4. Through-holes are provided on the PCB board 4 corresponding to both the main radiating coil 3 and the tuning coil 6. The main radiating coil 3 and the tuning coil 6 pass through the corresponding through-holes and are soldered to the PCB board 4 to achieve electrical connection. In this embodiment, a matching circuit is built into the PCB board 4. Through the above operation, this matching circuit is electrically connected to the main radiating coil 3, the tuning coil 6, the parallel capacitor, and the UHF RFID temperature measuring chip 5.

[0038] In the above embodiments, preferably, based on circuit principles, the resistance of a typical helical coil antenna is inductive, which can be expressed as Zin = Rin + jLin (where Lin > 0), while the resistance of the chip is Z = R + jRc (Rc < 0), which is capacitive. To achieve maximum power transmission, the chip impedance needs to be conjugate matched with the impedance of the helical antenna, i.e., Z = Zin*, which means R = Rin and Rc = -Lin. However, due to the strong inductance of the coil, it is difficult to achieve good impedance matching solely relying on the helical antenna and the chip itself. Therefore, in this embodiment, a parallel capacitor 41 is added between the helical antenna and the chip as an impedance matching capacitor to adjust the impedance characteristics of the entire circuit, allowing for better impedance matching between the helical antenna and the chip, ensuring minimal signal loss during transmission, achieving efficient power transmission, and thus improving the performance of the RFID electronic tag.

[0039] like Figure 2 As shown, in the above embodiment, preferably, in order to meet the requirements of the glass tube temperature measuring label in the laboratory, this embodiment provides a counterweight metal block 7 on the top of the tuning coil 6 to ensure that the glass tube label can sink to the bottom of any liquid to test the internal temperature of the liquid, and to perform vacuum sealing when sealing the glass tube to ensure that the glass tube label will not burst due to pressure difference at high temperature.

[0040] In the above embodiments, preferably, the counterweight metal block 7 is placed inside the tempered glass tube 1 and fixedly installed at the end of the tuning coil 6 away from the PCB board 4.

[0041] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A UHF band RFID glass tube temperature measuring label comprising a tempered glass tube, characterized in that, Also include: A tuning coil, an ultra-high frequency RFID temperature measurement circuit module and a ceramic rod are sequentially arranged in the steel glass tube along its axial direction, and a main radiation coil is wound on the ceramic rod; The ultra-high frequency RFID temperature measurement circuit module includes a PCB board, an ultra-high frequency RFID temperature measurement chip and an impedance matching capacitor which are electrically connected on the PCB board; the tuning coil and the main radiation coil are respectively electrically connected with the PCB board.

2. The UHF frequency band RFID glass tube temperature measuring label according to claim 1, characterized in that, A counterweight metal block is arranged in the steel glass tube and fixedly installed at one end of the tuning coil away from the PCB board.

3. The UHF frequency band RFID glass tube temperature measuring label according to claim 1, characterized in that, One side of the PCB board is electrically connected with the ultra-high frequency RFID temperature measurement chip and the tuning coil, and the other side of the PCB board is connected and fixed with the ceramic rod, and the main radiation coil is wound on the ceramic rod; The end of the ceramic rod away from the PCB board in the steel glass tube is filled with a heat-conducting sealant, and the heat-conducting sealant is used to fix the ceramic rod, the PCB board and the main radiation coil connected therewith.

4. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The inner diameter of the main radiation coil is matched with the outer diameter of the ceramic rod, and the length of the main radiation coil is matched with the length of the ceramic rod.

5. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The diameter of the main radiation coil and the tuning coil is the same as the pitch.

6. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The dielectric constant of the ceramic rod is 12±4.

7. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The diameter of the steel glass tube is 2.5mm-3.5mm, and the length of the steel glass tube is 15mm-23mm.

8. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The number of turns of the main radiation coil is greater than that of the tuning coil.

9. The UHF frequency band RFID glass tube temperature measurement tag according to claim 1, characterized in that, The impedance matching capacitor is used to adjust the impedance of the main radiation coil and the tuning coil to realize impedance matching with the ultra-high frequency RFID temperature measurement chip.

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