Radio frequency identification tag identification rate test board

Abstract

According to the radio frequency identification tag identification rate test board provided by the invention, the first test antenna and the second test antenna are used for simulating the radio frequency identification antenna in an underground environment without drilling fluid and an underground environment containing drilling fluid respectively, and the driving mechanism is used for driving the movable end of the transmission mechanism; the test chip is driven to respectively pass through the first test antenna and the second test antenna, and the signal identification rate of the test chip in the first test antenna and the second test antenna is analyzed by using a signal detection instrument, so that the underground identification conditions of a wireless radio frequency tag and a radio frequency identification antenna can be simulated; and influence factors influencing the recognition efficiency are explored. For the first test antenna, the influence of different diameters of the first test antenna on the signal recognition rate of the test chip can be researched by selecting the first winding base bodies with different diameters, and the signal recognition rate of the test chip can be further researched by adjusting the transmission speed of the transmission mechanism. And the influence of different speeds of the test chip penetrating through the first test antenna on the signal recognition rate is researched.

Description

Technical Field

[0001] This invention belongs to the field of downhole radio frequency identification testing technology, and specifically relates to a wireless radio frequency tag recognition rate testing platform. Background Technology

[0002] Radio Frequency Identification (RFID) technology is a wireless communication technology that utilizes radio frequency electromagnetic fields, with information stored within RFID tags. RFID technology is currently widely used in drilling, completion, and cementing operations, such as attaching RFID tags to downhole tools. These tags are readable in drilling and completion fluids such as mud, seawater, brine, and mixtures of sand and proppant. Because downhole tools with RFID tags only recognize tags containing unique identifiers, multiple downhole tools can be connected to the same tubing string and run into the well, based on RFID control principles. The RFID antenna reads the information carried by the RFID tags, thereby controlling the mechanical movements of the downhole tools. Each downhole tool only moves when activated by a specific tag. Using RFID-operated downhole tools eliminates complex mechanical operations, simplifies workflows, and reduces non-productive time.

[0003] To optimize the identification efficiency of RFID tags and RFID antennas in downhole environments, it is necessary to study downhole tools using RFID control methods, and to conduct in-depth research on the read rate of the control data carried by the tags and other influencing factors after the RFID tags are deployed.

[0004] Therefore, how to provide a wireless RFID tag recognition rate test bench that can simulate the recognition situation of wireless RFID tags and RFID antennas in underground wells, and explore the factors affecting recognition efficiency, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a wireless radio frequency tag recognition rate test bench that can simulate the recognition situation of wireless radio frequency tags and radio frequency identification antennas in underground wells, and explore the factors affecting recognition efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides a wireless radio frequency tag recognition rate test bench, comprising: a test bench, a drive mechanism, a transmission mechanism, a test chip for simulating wireless radio frequency tags, a first test antenna and a second test antenna for simulating radio frequency identification antennas, and a signal detection instrument;

[0007] The driving mechanism and the transmission mechanism are mounted on the test bench. The driving mechanism is used to drive the movable end of the transmission mechanism to move, and the test chip is mounted on the movable end of the transmission mechanism.

[0008] The first test antenna includes a first winding substrate and a first winding metal wire. The first winding substrate is a hollow shell with a first inner cavity. The first winding metal wire is wound around the surface of the first winding substrate. The first inner cavity is used to pass through the movable end of the transmission mechanism and the test chip.

[0009] The second test antenna includes a second wound substrate and a second wound metal wire. The second wound metal wire is wound around the surface of the second wound substrate. The second wound substrate is a double-layered shell with inner and outer shells. The double-layered shell forms a second inner cavity between the inner wall, the outer wall and the two end faces. The second inner cavity is used to store drilling fluid. The double-layered shell forms a third inner cavity on the inner side of the inner wall. The third inner cavity is used to pass through the movable end of the transmission mechanism and the test chip.

[0010] The signal detection instrument is used to electrically or signal connect to the first test antenna and the second test antenna, respectively, to analyze the signal recognition rate of the test chip in the first test antenna and the second test antenna.

[0011] Optionally, in the above-mentioned RFID tag recognition rate test bench, a heating device is provided in the second inner cavity of the double-layer shell.

[0012] Optionally, in the above-mentioned RFID tag recognition rate test bench, the double-layer shell is provided with a heating device mounting hole and a liquid injection hole on the end face of the second inner cavity.

[0013] Optionally, in the above-mentioned RFID tag recognition rate test bench, the transmission mechanism is a belt drive mechanism or a chain drive mechanism, the test chip is mounted on the belt of the belt drive mechanism or the chain of the chain drive mechanism, and the drive mechanism is used to drive the pulley of the belt drive mechanism to rotate or to drive the sprocket of the chain drive mechanism to rotate.

[0014] Optionally, in the above-mentioned RFID tag recognition rate test bench, the test bench includes at least two layers;

[0015] The upper layer includes a first platform and a second platform. The first platform is used to support the drive mechanism and a part of the transmission mechanism, and the second platform is used to support another part of the transmission mechanism. A crossbeam is erected between the first platform and the second platform, and a support mechanism for supporting the first test antenna or the second test antenna is installed on the crossbeam.

[0016] The lower layer is used to house the signal detection instrument.

[0017] Optionally, in the above-mentioned RFID tag recognition rate test bench, the test chip, the first test antenna, and the second test antenna are mounted on the belt or chain located on the upper side;

[0018] The crossbeam is a hollow profile, and the belt or chain located on the lower side passes through the inner cavity of the crossbeam.

[0019] Optionally, in the above-mentioned RFID tag recognition rate test bench, the support mechanism includes a support plate and a stiffener. The upper part of the support plate is used to support the first test antenna or the second test antenna, and the lower part has a slot for embedding the crossbeam. The support plate has a plurality of first mounting holes on both sides of the slot along the height direction. The stiffener has a second mounting hole at each end. The second mounting holes of the stiffener and the first mounting holes of the support plate are connected by bolts, so that a mounting position for connecting the crossbeam is formed between the support plate and the stiffener.

[0020] Optionally, in the above-mentioned RFID tag recognition rate test bench, the upper part of the support plate is provided with a V-shaped groove.

[0021] Optionally, in the above-mentioned RFID tag recognition rate test bench, the driving mechanism is a rotary handle or a speed-regulating motor.

[0022] Optionally, in the above-mentioned RFID tag recognition rate test bench, the first winding substrate is a hollow cylinder, and the second winding substrate is a double-layered cylinder with inner and outer shells.

[0023] This invention provides a wireless radio frequency tag recognition rate testing platform, which has the following advantages:

[0024] The first and second test antennas simulate RFID antennas in downhole environments without and with drilling fluid, respectively. A drive mechanism drives the moving end of the transmission mechanism, causing the test chip to pass through the first and second test antennas. Signal detection instruments are used to analyze the signal recognition rate of the test chip within the first and second test antennas. This simulates the identification performance of RFID tags and antennas downhole and explores factors affecting recognition efficiency. For the first test antenna, different diameters of the first winding substrate can be selected to study the impact of different antenna diameters on the signal recognition rate of the test chip. Furthermore, adjusting the transmission speed of the transmission mechanism can be used to study the impact of different speeds at which the test chip passes through the first test antenna on the signal recognition rate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of a wireless radio frequency tag recognition rate test bench (using a first test antenna) provided in an embodiment of the present invention.

[0027] Figure 2 A schematic diagram of a wireless radio frequency tag recognition rate test bench provided in an embodiment of the present invention (using a first test antenna, and...) Figure 1 (The cross-sectional dimensions of the test antennas differ).

[0028] Figure 3 A schematic diagram of a wireless radio frequency tag recognition rate test bench (using a second test antenna) provided in an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of the support plate provided in an embodiment of the present invention;

[0030] Figure 5 This is an exploded view of the support plate provided in an embodiment of the present invention;

[0031] Figure 6 A side view of the second test antenna provided in an embodiment of the present invention;

[0032] Figure 7 for Figure 6 Cross-sectional view along direction AA.

[0033] In the image above:

[0034] 1-Test bench; 2-Speed-regulating motor; 3-Coupling; 4-Bearing housing; 5-Pulley; 6-Test chip; 7-Crossbeam;

[0035] 8-Supporting mechanism; 801-Supporting plate; 802-Firming plate;

[0036] 901 - First test antenna; 902 - Second test antenna;

[0037] 10-Belt; 11-Shelf. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] The core of this invention is to provide a wireless radio frequency tag recognition rate test bench that can simulate the recognition situation of wireless radio frequency tags and radio frequency identification antennas in underground wells and explore the factors affecting recognition efficiency.

[0040] To enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] For details, please refer to Figures 1-7 The present invention provides a wireless radio frequency tag recognition rate test bench, comprising: a test bench 1, a drive mechanism, a transmission mechanism, a test chip 6, a first test antenna 901, a second test antenna 902, and a signal detection instrument.

[0042] Among them, the test bench 1 serves as the main load-bearing device for the RFID tag recognition rate test bench, and can directly or indirectly install various components on the test bench 1.

[0043] The fixed ends of both the drive mechanism and the transmission mechanism are mounted on the test bench 1. The drive mechanism is used to drive the movable end of the transmission mechanism to move, and the test chip 6 is mounted on the movable end of the transmission mechanism. Driven by the drive mechanism, the movable end of the transmission mechanism can move the test chip 6 mounted on it to simulate the movement trajectory of the RFID tag underground.

[0044] The first test antenna 901 includes a first winding substrate and a first winding metal wire. The first winding substrate is a hollow shell with a first inner cavity. The shape of the hollow shell can be adapted according to actual needs, which will not be described in detail here. The first winding metal wire is wound around the surface of the first winding substrate. The first inner cavity is used to pass through the movable end of the transmission mechanism and the test chip 6.

[0045] The second test antenna 902 includes a second wound substrate and a second wound metal wire. The second wound metal wire is wound around the surface of the second wound substrate. The second wound substrate is a double-layered shell with inner and outer shells. The shape of the double-layered shell can be adapted according to actual needs, which will not be described in detail here. A second inner cavity is formed between the inner wall, the outer wall, and the two end faces of the double-layered shell. The second inner cavity is used to store drilling fluid. A third inner cavity is formed on the inner side of the inner wall of the double-layered shell. The third inner cavity is used for the passage of the movable end of the transmission mechanism and the test chip 6.

[0046] It should be noted that the first test antenna 901 and the second test antenna 902 are used selectively in the experiment depending on the different influencing factors being studied. The first test antenna 901 and the second test antenna 902 can be mounted on the test bench 1 through the support mechanism 8 and are detachably connected to the support mechanism 8.

[0047] The signal detection instrument is used to electrically or signal-connect to the first test antenna 901 and the second test antenna 902, respectively, to analyze the signal recognition rate of the test chip 6 within the first test antenna 901 and the second test antenna 902. Preferably, the signal detection instrument is typically connected to the first test antenna 901 and the second test antenna 902 via a signal line.

[0048] It should be noted that the test chip 6 is used to simulate a RFID tag, and its structure is the same as that of the RFID tag under test. The first test antenna 901 and the second test antenna 902 are used to simulate RFID antennas, and their structures are the same as those of downhole RFID antennas. The difference between the two is that they can simulate different downhole environmental conditions. For the first test antenna 901, the influence of the diameter of the first test antenna 901 on the signal recognition rate of the test chip 6 can be studied by selecting a first winding substrate with different diameters (i.e., studying the influence of the diameter of the RFID antenna on the downhole signal recognition rate). The influence of the speed at which the test chip 6 passes through the first test antenna 901 on the signal recognition rate can also be studied by adjusting the transmission speed of the transmission mechanism (or adjusting the rotation speed of the drive mechanism) (i.e., studying the influence of the RFID tag's moving speed on the downhole signal recognition rate). Furthermore, the influence of the distance between the RFID tag and the RFID antenna on the signal recognition rate, and the influence of drilling fluid composition on the signal recognition rate can also be studied.

[0049] This invention provides a wireless radio frequency tag (RFID) recognition rate test bench. A first test antenna 901 and a second test antenna 902 simulate RFID antennas in a downhole environment without drilling fluid and in a downhole environment containing drilling fluid, respectively. A drive mechanism drives the movable end of a transmission mechanism, causing the test chip 6 to pass through the first test antenna 901 and the second test antenna 902. Signal detection instruments are used to analyze the signal recognition rate of the test chip 6 within the first and second test antennas 901 and 902. This allows for the simulation of the signal recognition rate of RFID tags and RFID antennas in downhole environments and the exploration of factors affecting recognition efficiency.

[0050] To investigate the factors affecting recognition efficiency, a first test antenna 901 of the same diameter can be used. By adjusting the speed of the drive / transmission mechanism, the test chip 6 can be given different speeds to explore the effect of the speed at which the test chip 6 passes through the first test antenna 901 on the recognition rate. Keeping the speed of the drive / transmission mechanism constant, the diameter of the first test antenna 901 can be adjusted to explore the effect of the distance between the test chip 6 and the first test antenna 901 on the recognition rate. A second test antenna 902 can be used to heat the drilling fluid to explore the effect of the drilling fluid temperature on the recognition rate. A second test antenna 902 can be used to fill the second inner cavity with drilling fluid of different compositions to explore the effect of the drilling fluid composition on the recognition rate.

[0051] To further investigate the impact of drilling fluid temperature on identification efficiency, a heating device is installed in the second inner cavity of the double-layered shell to heat the drilling fluid. Specifically, the heating device can be a heating rod, heating wire, or similar structure. The double-layered shell has mounting holes for the heating device and injection holes on its end faces within the second inner cavity. For example, a heating rod mounting hole can be provided on one end face of the double-layered shell within the second inner cavity for inserting a heating rod, and the interface of the heating rod mounting hole is sealed to ensure that the entire second test antenna 902 is leak-proof. Injection holes are also provided on the end faces of the double-layered shell within the second inner cavity; these holes can be located on the same side or different side faces of the double-layered shell within the second inner cavity, without further limitation.

[0052] In a specific embodiment, the transmission mechanism is a belt drive mechanism or a chain drive mechanism. The test chip 6 is mounted on the belt 10 of the belt drive mechanism or the chain of the chain drive mechanism. The drive mechanism is used to drive the pulley 5 of the belt drive mechanism to rotate or to drive the sprocket of the chain drive mechanism to rotate.

[0053] like Figures 1-3 As shown, the belt drive mechanism includes two pulleys 5 and a belt 10 that meshes with the two pulleys 5. A bearing seat 4 is provided on each side of each pulley 5, and the bearing seats 4 are mounted on the test bench 1. A rotating shaft is located at the center hole of each pulley 5, and both ends of the rotating shaft pass through the bearing seats 4 on both sides and are securely fitted with bearings inside the bearing seats 4. A speed-regulating motor 2 is connected to the rotating shaft of one of the pulleys 5 via a coupling 3 to drive the pulley 5 to rotate. This pulley 5 acts as the driving pulley, and the other pulley 5 acts as the driven pulley. The bearing seats 4 and the central shaft provide support for the pulleys 5. Of course, the driving principle and arrangement of the chain drive mechanism are the same as those of the belt drive mechanism, and will not be described in detail here.

[0054] To further optimize the setup of the test bench 1, the test bench 1 includes at least two layers.

[0055] The upper layer includes a first platform and a second platform. The first platform is used to support a part of the drive mechanism and the transmission mechanism, and the second platform is used to support another part of the transmission mechanism. A crossbeam 7 is erected between the first platform and the second platform. A support mechanism 8 for supporting the first test antenna 901 or the second test antenna 902 is installed on the crossbeam 7.

[0056] The lower layer is used to place signal detection instruments, i.e., the third platform. Other equipment besides signal detection instruments can also be placed on the third platform. For example, when using the first test antenna 901, the second test antenna 902 can be placed on the third platform.

[0057] Specifically, the test bench 1 includes two spaced-apart support platforms. The top planes of the two support platforms are the first platform and the second platform, respectively. The bottoms of the two support platforms are connected together by a shelf 11. The plane on which the shelf 11 is located is the third platform, which can hold signal detection instruments and other equipment.

[0058] Specifically, the test chip 6, the first test antenna 901, and the second test antenna 902 are mounted on the belt 10 or chain located on the upper side. The crossbeam 7 is a hollow profile, and the belt 10 or chain located on the lower side passes through the inner cavity of the crossbeam 7, thereby providing a movement channel for the belt 10 or chain on the lower side.

[0059] In a further specific embodiment, in order to accommodate the first test antenna 901 and the second test antenna 902 of different sizes, the support mechanism 8 includes a support plate 801 and a stiffener 802. The upper part of the support plate 801 is used to support the first test antenna 901 or the second test antenna 902, and the lower part is provided with a slot for embedding the crossbeam 7. The support plate 801 has a plurality of first mounting holes on both sides of the slot along the height direction. The two ends of the stiffener 802 are provided with a second mounting hole. The second mounting holes of the stiffener 802 and the first mounting holes of the support plate 801 are connected by bolts, so that a mounting position for connecting the crossbeam 7 is formed between the support plate 801 and the stiffener 802.

[0060] The upper part of the support plate 801 is configured with a V-shaped groove to support the first test antenna 901 and the second test antenna 902. There is a stiffening plate 802 on each of the front and rear sides of the support plate 801. The second mounting hole and the first mounting hole are aligned and connected with bolts and nuts. The support mechanism 8 serves as a base to support the two test antennas, ensuring the stability of the support plate 801 placed on the crossbeam 7. The position of the stiffening plate 802 can be adjusted according to the diameter of the test antenna to ensure that the belt 10 passes through the center of the test antenna.

[0061] The upper part of the support plate 801 can be provided with a V-shaped groove. The first winding substrate is a hollow cylinder, and the second winding substrate is a double-layered cylinder with inner and outer sleeves. In particular, for the first test antenna 901 and the second test antenna 902, which have cylindrical structures, the V-shaped groove surface support is more stable and can be adapted to cylinders of different diameters.

[0062] Specifically, the drive mechanism is a rotary handle or a speed-regulating motor 2. Using a speed-regulating motor 2 can improve the accuracy of speed regulation.

[0063] In a specific embodiment, the test bench 1 can be welded from structural steel, and the placement plate 11 can be a steel plate. When the drive mechanism uses a speed-regulating motor 2 and the transmission mechanism uses a belt drive mechanism, bearing seats 4 are provided on both sides of the pulley 5, and the rotating shaft passes through the bearing seats 4 and is connected to the output shaft of the speed-regulating motor 2 through a coupling 3. The fixed end of the speed-regulating motor 2 is installed on the first platform of the test bench 1, and the bearing seats 4 and the crossbeam 7 are connected to the first platform and the second platform respectively by bolts and nuts. The bearing seats 4 have built-in bearings, and the bearing seats 4 and the rotating shaft provide support for the pulley 5. A belt 10 is wound around the two pulleys 5, and the test chip 6 is fixed on the belt 10.

[0064] The test antenna comprises a wound substrate and wound metal wires, with the metal wires tightly wound around the entire outer surface of the wound substrate. For one type of test antenna, namely the first test antenna 901, the wound substrate is a hollow cylinder. For another type of test antenna, namely the second test antenna 902, the wound substrate has a two-layer structure, with the outer layer, inner layer, and end faces forming a sealed cavity. Drilling fluid can be injected into the cavity, and a heating device for heating the drilling fluid can also be inserted. The belt 10 can pass through the internal space of the inner cylinder.

[0065] The crossbeam 7 is a hollow square steel profile, through which the belt 10 can pass. The support mechanism 8 includes a support plate 801 and stiffeners 802. The upper V-shaped groove of the support plate 801 is used to place the test antenna. The lower part of the support plate 801 has several vertically arranged through holes (first mounting holes). The two ends of the stiffeners 802 also have through holes (second mounting holes). A stiffener 802 is provided on each of the front and rear sides of the support plate 801. After the through holes are aligned, they are connected with bolts and nuts to provide a base for support and ensure the stability of the support plate 801 on the crossbeam 7. The installation position of the stiffeners 802 can be adjusted according to the diameter of the test antenna to ensure that the belt 10 passes through the center of the test antenna. The placement plate 11 is fixed on the test bench 1 to place the signal detection instrument, which is connected to the test antenna via a signal line.

[0066] In summary, the RFID tag recognition rate test bench provided by this invention can simulate the process of RFID tags passing through an RFID antenna with circulating drilling fluid. This allows for the investigation of the effects of the RFID tag's speed across the antenna on the recognition rate, the distance between the RFID tag and the antenna on the recognition rate, the drilling fluid temperature on the recognition rate, and the drilling fluid composition on the recognition rate. It enables the study of the influence of multiple factors on the recognition rate. Experimental data obtained through ground-based tests can guide the design of downhole tools.

[0067] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] In the description of this application, "multiple" means two or more. If "first" or "second" is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0069] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0070] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0072] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A wireless radio frequency tag recognition rate testing platform, characterized in that, include: The test bench, drive mechanism, transmission mechanism, test chip for simulating radio frequency tags, first and second test antennas for simulating radio frequency identification antennas, and signal detection instruments; The driving mechanism and the transmission mechanism are mounted on the test bench. The driving mechanism is used to drive the movable end of the transmission mechanism to move, and the test chip is mounted on the movable end of the transmission mechanism. The first test antenna includes a first winding substrate and a first winding metal wire. The first winding substrate is a hollow shell with a first inner cavity. The first winding metal wire is wound around the surface of the first winding substrate. The first inner cavity is used to pass through the movable end of the transmission mechanism and the test chip. The second test antenna includes a second wound substrate and a second wound metal wire. The second wound metal wire is wound around the surface of the second wound substrate. The second wound substrate is a double-layered shell with inner and outer shells. The double-layered shell forms a second inner cavity between the inner wall, the outer wall and the two end faces. The second inner cavity is used to store drilling fluid. The double-layered shell forms a third inner cavity on the inner side of the inner wall. The third inner cavity is used to pass through the movable end of the transmission mechanism and the test chip. The signal detection instrument is used to electrically or signal connect to the first test antenna and the second test antenna, respectively, to analyze the signal recognition rate of the test chip in the first test antenna and the second test antenna.

2. The RFID tag recognition rate testing platform according to claim 1, characterized in that, A heating device is provided in the second inner cavity of the double-layered shell.

3. The RFID tag recognition rate testing platform according to claim 2, characterized in that, The double-layer shell has a heating device mounting hole and a liquid injection hole respectively opened on the end face of the second inner cavity.

4. The RFID tag recognition rate testing platform according to claim 1, characterized in that, The transmission mechanism is a belt drive mechanism or a chain drive mechanism. The test chip is mounted on the belt of the belt drive mechanism or the chain of the chain drive mechanism. The drive mechanism is used to drive the pulley of the belt drive mechanism to rotate or to drive the sprocket of the chain drive mechanism to rotate.

5. The RFID tag recognition rate testing platform according to claim 4, characterized in that, The test bench includes at least two layers; The upper layer includes a first platform and a second platform. The first platform is used to support the drive mechanism and a part of the transmission mechanism, and the second platform is used to support another part of the transmission mechanism. A crossbeam is erected between the first platform and the second platform, and a support mechanism for supporting the first test antenna or the second test antenna is installed on the crossbeam. The lower layer is used to house the signal detection instrument.

6. The RFID tag recognition rate testing platform according to claim 5, characterized in that, The test chip, the first test antenna, and the second test antenna are mounted on the belt or chain located on the upper side; The crossbeam is a hollow profile, and the belt or chain located on the lower side passes through the inner cavity of the crossbeam.

7. The RFID tag recognition rate testing platform according to claim 6, characterized in that, The support mechanism includes a support plate and a stiffener. The upper part of the support plate is used to support the first test antenna or the second test antenna, and the lower part has a slot for embedding the crossbeam. The support plate has a plurality of first mounting holes on both sides of the slot along the height direction. The stiffener has a second mounting hole at each end. The second mounting holes of the stiffener and the first mounting holes of the support plate are connected by bolts, so that the support plate and the stiffener form a mounting position for connecting the crossbeam.

8. The RFID tag recognition rate testing platform according to claim 7, characterized in that, The upper part of the support plate is provided with a V-shaped groove.

9. The RFID tag recognition rate testing platform according to claim 4, characterized in that, The drive mechanism is a rotary handle or a speed-regulating motor.

10. The RFID tag recognition rate testing platform according to claim 1, characterized in that, The first winding substrate is a hollow cylinder, and the second winding substrate is a double-layered cylinder with inner and outer shells.

Images