Optical fiber identification module and system

Abstract

The utility model discloses an optical fiber identification module and system. A main control unit is in communication connection with an antenna card reader unit, the antenna card reader unit is also in communication connection with a signal processing unit, the signal processing unit is also in communication connection with a first impedance matching unit, and the first impedance matching unit is also in communication connection with an antenna unit; the antenna unit comprises a hollow circuit board and an annular antenna, the hollow circuit board comprises a hollow area, each circle of the annular antenna is in a circular arc shape, and the annular antenna is arranged around the hollow area. The shape of each loop of the loop antenna comprises an arc shape, so that the gain of the loop antenna changes slightly along with the angle, and the identification range of the antenna unit is large, so that the loop antenna with a smaller size can complete the identification in a larger range, and the cost is lower. Due to the arrangement of the first impedance matching unit and the signal processing unit, the maximum identification distance of the loop antenna is controllable, and the accuracy and reliability of optical fiber identification detection can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber identification, and in particular to an optical fiber identification module and system. Background Art

[0002] Existing fiber optic identification technology typically uses a probe-and-ring press-on method, connecting to a semiconductor storage device encapsulated within the fiber. This device stores read-only data such as encryption keys and usage counts. However, with this probe-and-ring press-on method, mechanical components wear over time, leading to a decrease in connection stability and potentially requiring repair or replacement.

[0003] Existing technologies also employ radio frequency identification (RFID) for optical fiber identification, but these typically use rectangular antennas. For ease of installation, the fiber's end is typically cylindrical, resulting in the position of the RFID tag inside the fiber varying with each installation. Furthermore, the rectangular antenna's radiation pattern indicates significant gain variation with angle within its effective range, resulting in high loss. Furthermore, the antenna is large and has a limited identification range. Utility Model Content

[0004] The utility model provides an optical fiber identification module and system, which are lossless, have a large identification range, can improve the accuracy and reliability of optical fiber identification detection, and have low cost.

[0005] In a first aspect, an embodiment of the present utility model provides a fiber identification module, comprising: an antenna card reading control module and an antenna module;

[0006] The antenna card reading control module includes a main control unit, an antenna card reader unit and a signal processing unit; the antenna module includes an antenna unit and a first impedance matching unit;

[0007] The main control unit is communicatively connected to the antenna card reader unit, the antenna card reader unit is further communicatively connected to the signal processing unit, the signal processing unit is further communicatively connected to the first impedance matching unit, and the first impedance matching unit is further communicatively connected to the antenna unit;

[0008] The antenna unit includes a hollow circuit board and a loop antenna, the hollow circuit board includes a hollow area, each circle of the loop antenna includes an arc shape, and the loop antenna is arranged around the hollow area;

[0009] A first distance from the edge of the hollow area to the center is greater than the radius of the optical fiber to be identified, and a second distance from the inner side of the ring antenna to the center of the hollow area is greater than the radius of the optical fiber to be identified and is less than or equal to the maximum identifiable distance of the ring antenna.

[0010] In a second aspect, an embodiment of the present utility model further provides a fiber identification system, comprising the fiber identification module and the laser therapy machine described in any embodiment of the first aspect;

[0011] The laser therapy machine includes a controller and an external power supply;

[0012] The controller is communicatively connected to the optical fiber identification module, and the external power supply is electrically connected to the optical fiber identification module.

[0013] The embodiment of the present utility model discloses a fiber optic identification module and system, which uses a loop antenna to be arranged around a hollow area. Since the shape of each circle of the loop antenna includes a circular arc, the gain changes little with the angle, and the recognition range of the antenna unit is large, so that a smaller-sized loop antenna can complete a larger range of recognition at a lower cost. Due to the provision of a first impedance matching unit and a signal processing unit, the maximum recognition distance of the loop antenna is controllable, which can improve the accuracy and reliability of fiber optic identification detection. The solution of the embodiment of the present utility model can identify specific fiber models without loss, preventing the reuse of optical fibers that have reached the end of their service life from affecting the effect of the laser therapy machine.

[0014] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an optical fiber identification module provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic structural diagram of an antenna unit provided in an embodiment of the present utility model;

[0018] Figure 3 A schematic structural diagram of a loop antenna provided in an embodiment of the present utility model;

[0019] Figure 4 A schematic structural diagram of another optical fiber identification module provided in an embodiment of the present utility model;

[0020] Figure 5A schematic structural diagram of an antenna card reading control module provided in an embodiment of the present utility model;

[0021] Figure 6 A schematic structural diagram of an antenna module provided in an embodiment of the present utility model;

[0022] Figure 7 A structural diagram of another antenna card reading control module provided by an embodiment of the present utility model;

[0023] Figure 8 A schematic structural diagram of a first power supply circuit provided in an embodiment of the present utility model;

[0024] Figure 9 A schematic structural diagram of a second power supply circuit provided in an embodiment of the present utility model;

[0025] Figure 10 This is a structural diagram of a fiber optic identification system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Figure 1 A schematic diagram of the structure of an optical fiber identification module provided by an embodiment of the present utility model is shown in FIG. Figure 2 This is a schematic diagram of the structure of an antenna unit provided by an embodiment of the present utility model. Figure 1The optical fiber identification module 10 includes an antenna card reader control module 100 and an antenna module 200. The antenna card reader control module 100 includes a main control unit 110, an antenna card reader unit 120, and a signal processing unit 130. The antenna module 200 includes an antenna unit 210 and a first impedance matching unit 220. The main control unit 110 is in communication with the antenna card reader unit 120, which is in communication with the signal processing unit 130. The signal processing unit 130 is in communication with the first impedance matching unit 220, which is in communication with the antenna unit 210.

[0029] The main control unit 110 may include an STM32F103C8T6 chip, and the antenna card reader unit 120 may include a CLRC663 chip.

[0030] refer to Figure 2 The antenna unit 210 includes a hollow circuit board 211 and a loop antenna 212. The hollow circuit board 211 includes a hollow area 2111. Each loop of the loop antenna 212 is arc-shaped, and the loop antenna 212 is arranged around the hollow area 2111. A first distance r1 from the edge of the hollow area 2111 to the center o is greater than the radius of the optical fiber to be identified. A second distance r2 from the inner side of the loop antenna 212 to the center o of the hollow area 2111 is greater than the radius of the optical fiber to be identified and is less than or equal to the maximum identifiable distance of the loop antenna 212.

[0031] Figure 3 A schematic diagram of a loop antenna according to an embodiment of the present invention is provided. Figure 2 and Figure 3 It is understood that the winding method of the loop antenna 212 of the embodiment of the present invention can be as follows: Figure 2 As shown in FIG, the spiral winding method is used, and the method can also be used as shown in FIG. Figure 3 As shown in FIG, the loop antenna 212 is coiled such that the second end of each coiled arc antenna is connected to the first end of the adjacent coil antenna away from the center. It should be noted that the hollow region 2111 of the hollow circuit board 211 of the present embodiment can be customized according to the size of the optical fiber to be identified, and the outer contour and size of the hollow circuit board 211 can be customized according to the installation location. The shape of the hollow region 2111 can be freely selected according to the use requirements. Exemplary shapes of the hollow region 2111 include circular and square.

[0032] The antenna in the embodiment of the present invention adopts a loop antenna 212. The shape of each circle of the loop antenna 212 includes a circular arc, so that within the effective range, the gain changes little, and the gain of the antenna remains relatively stable at different scanning angles, that is, within a wider angle range, the receiving or transmitting capability of the antenna will not drop significantly, and the received signal is more uniform and stable than that of a square. Among them, the maximum recognition distance of the loop antenna 212 can be modified by adjusting the impedance value of the circuit in the signal processing unit 130 and the first impedance matching unit 220. To prevent false triggering, the impedance value can be increased, thereby narrowing the maximum recognition range. If a larger recognition range is required, the impedance value can be reduced, thereby reading and writing electronic tags and improving the accuracy of optical fiber detection. The embodiment of the present invention can ensure that electromagnetic wave signals can be transmitted at maximum output power and reduce return loss by impedance matching and forming an electromagnetic field of the desired shape.

[0033] It will be appreciated that in the embodiment of the present invention, when the fiber identification module 10 is operating normally, all components are initialized. The main control unit 110 then controls the antenna reader unit 120 to transmit a software-programmed microwave signal of a specific frequency via the signal processing unit 130 and the first impedance matching unit 220 to the antenna unit 210. The antenna unit 210 is configured to radiate and receive radio waves. The specific frequency microwave signal is converted by the antenna unit 210 into direct current, forming an electromagnetic field. When an electronic tag installed inside the optical fiber to be identified enters the maximum identification distance of the antenna unit 210, the tag is activated for data transmission. The antenna unit 210 transmits the electronic tag information to the antenna reader unit 120 via the first impedance matching unit 220 and the signal processing unit 130. Once the antenna reader unit 120 detects the electronic tag, it can read and write the information stored in the tag. After successfully reading and writing the electronic tag from the antenna reader unit 120, the main control unit 110 can perform password identification of the tag by repeatedly handling the tag, modify the number of identifications, and transmit the identified tag data to the host computer. If the electronic tag being identified is not encrypted, it cannot be read. When the number of identifications reaches the maximum number that the electronic tag can identify, the electronic tag is replaced and the detection process is repeated, so that the specific optical fiber model can be identified without loss, preventing the reuse of optical fibers that have reached the end of their service life and affecting the effectiveness of the treatment machine.

[0034] The embodiment of the present invention uses a loop antenna 212 disposed around the hollow area 2111. Since each circle of the loop antenna 212 is arc-shaped, the gain changes little with angle, and the recognition range of the antenna unit 210 is large, so that a smaller-sized loop antenna 212 can complete a larger range of recognition, and the cost is low. Due to the provision of the first impedance matching unit 220 and the signal processing unit 130, the maximum recognition distance of the loop antenna 212 is controllable, which can improve the accuracy and reliability of optical fiber identification and detection. The solution of the embodiment of the present invention can identify specific optical fiber models without loss, preventing the reuse of optical fibers that have reached the end of their service life from affecting the effect of the laser therapy machine.

[0035] Figure 4 A schematic diagram of the structure of another optical fiber identification module provided by the embodiment of the present invention, optionally, based on the above embodiment, refer to Figure 4 The optical fiber identification module 10 further includes a signal transmission module 300. The signal transmission module 300 includes a first interface 310, a second interface 320, and a coaxial line 330. The first interface 310 is provided on the antenna card reading control module 100, and the second interface 320 is provided on the antenna module 200. The coaxial line 330 is connected between the first interface 310 and the second interface 320. The first impedance matching unit 220 is sequentially connected to the signal processing unit 130 through the second interface 320, the coaxial line 330, and the first interface 310.

[0036] In this embodiment of the present invention, antenna unit 210 includes a hollow circuit board 211 and a loop antenna 212. Antenna unit 210 uses a first impedance matching unit 220 for impedance matching. The signal from loop antenna 212 is transmitted via a coaxial line 330 and is a single-ended signal. At a specific operating frequency, the impedance of first impedance matching unit 220 is adjusted to match the impedance of antenna unit 210 to the same as the impedance of coaxial line 330, thereby reducing transmission loss. For example, the operating frequency may be 13.56 MHz, and the impedance of coaxial line 330 may be 50 ohms.

[0037] Figure 5 This is a structural diagram of an antenna card reading control module 100 provided in an embodiment of the present utility model. Figure 6 This is a schematic diagram of the structure of an antenna module provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 4-5The signal processing unit 130 includes a filter circuit 131, a second impedance matching unit 132, and a balun transformer 133. The first impedance matching unit 220 antenna reader unit 120 is communicatively connected to the filter circuit 131, which is communicatively connected to the second impedance matching unit 132. The second impedance matching unit 132 is communicatively connected to the balun transformer 133. The balun transformer 133 is communicatively connected to the first impedance matching unit 220 via the first interface 310, the coaxial line 330, and the second interface 320. The first impedance matching unit 220 is communicatively connected to the loop antenna 212. The second impedance matching unit 132 includes a first differential matching circuit 1321 and a second differential matching circuit 1322. The first end of the first side of the balun transformer 133 is communicatively connected to the first differential matching circuit 1321, and the second end of the first side of the balun transformer 133 is communicatively connected to the second differential matching circuit 1322; the first end of the second side of the balun transformer 133 is grounded, and the second end of the second side of the balun transformer 133 is communicatively connected to the first impedance matching unit 220; the first impedance matching unit 220 is communicatively connected to the loop antenna 212.

[0038] It can be understood that in the embodiment of the present invention, the antenna card reader unit 120 is used to transmit and receive differential signals, the loop antenna 212 is used to transmit and receive single-ended signals, and the balun transformer 133 is also called a balanced-unbalanced converter. The balun transformer 133 is used for signal processing in order to change the single-ended signal transmission into differential signal transmission.

[0039] In this embodiment of the present invention, the first impedance value of the second impedance matching unit 132 is equal to the second impedance value of the first impedance matching unit 220 and the loop antenna 212, and the third impedance value of the coaxial line 330. The fourth impedance value of the first differential matching circuit 1321 is equal to the fifth impedance value of the second differential matching circuit 1322, and the sum of the fourth impedance value and the fifth impedance value is equal to the first impedance value.

[0040] In the embodiment of the present invention, the second impedance matching unit 132 includes a first differential matching circuit 1321 and a second differential matching circuit 1322. Because the fourth impedance value of the first differential matching circuit 1321 and the fifth impedance value of the second differential matching circuit 1322 are equal, and the sum of the fourth and fifth impedance values ​​equals the first impedance value of the second impedance matching unit 132, common-mode signals can cancel each other out, significantly reducing radiated common-mode interference signals. Useful signals are transmitted via differential-mode signals, thereby improving the EMC performance and anti-interference capabilities of the circuit. The balanced-output second impedance matching unit 132 is divided into two single-ended circuits (the first differential matching circuit 1321 and the second differential matching circuit 1322). Through conversion calculation, the input and output impedances of the first differential matching circuit 1321 and the second differential matching circuit 1322 are both 1 / 2 of that of the second impedance matching unit 132. This ensures that when the first differential matching circuit 1321 and the second differential matching circuit 1322 are combined into a single-ended circuit, the overall input and output impedances remain unchanged.

[0041] Illustratively, in an embodiment of the present invention, impedance matching can be achieved using simulation software and a Smith chart. The antenna module 200 includes an antenna unit 210 and a first impedance matching unit 220. By RF simulation of the loop antenna, the Smith chart is adjusted so that the real part of the impedance is 50 ohms and the imaginary part is 0 at an operating frequency of 13.56 MHz. The circuit after RF simulation matching is then measured using a coaxial cable 330 using a network analyzer to test the return loss and Smith chart effect. The signal processing unit 130 in the antenna card reading control module 100 is used to send and receive signals. The signal processing unit 130 needs to perform impedance matching. The impedance after passing through the filter circuit 131 is calculated by the Smith chart on a single end, and then the first differential matching circuit 1321 and the second differential matching circuit 1322 are matched to 25 ohms and connected to the differential end of the balun transformer 133 (the first end of the first side of the balun transformer 133 and the second end of the first side of the balun transformer 133). The actual test is performed when the antenna module 200 is powered on, and the signal processing unit 130 and the first impedance matching unit 220 are connected using the balun transformer 133 and the single-ended coaxial cable 330.

[0042] After the matching steps above, the signal is strongest at the operating frequency of 13.56 MHz. The return loss of both the antenna card reader control module 100 and the antenna module 200 is approximately -20 dB, indicating that less than 1% of the injected 1 mW power is reflected back to the transmitter. The Smith chart is near the midpoint of 50 ohms, indicating a signal transmission quality of approximately 99%. Actual measurements using a 1.2 x 12 mm electronic tag revealed that the tag could be recognized within a range of ±13 mm perpendicular to the plane of the loop antenna 212. Simulation and physical testing confirmed that the loop antenna 212 can recognize tags within an inner diameter of 40 mm. The size of the loop antenna 212 can be customized to meet identification requirements. For example, the loop antenna 212 can be formed by four windings. The inner diameter of the loop antenna 212 can be 32 mm, the outer diameter can be 42 mm, the coil width of the loop antenna 212 can be 10 mils, and the pitch can be 12 mils.

[0043] Optionally, based on the above embodiment, continue to refer to Figure 5 The first differential matching circuit 1321 includes a first capacitor C1 and a second capacitor C2, and the second differential matching circuit 1322 includes a third capacitor C3 and a fourth capacitor C4. The first end of the first capacitor C1 is communicatively connected to the first end of the first side of the balun transformer 133, the second end of the first capacitor C1 is electrically connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is grounded. The first end of the third capacitor C3 is electrically connected to the second end of the first side of the balun transformer 133, the second end of the third capacitor C3 is electrically connected to the first end of the fourth capacitor C4, and the second end of the fourth capacitor C4 is grounded.

[0044] It is understood that impedance matching can be achieved by adjusting the capacitance of the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4. For example, the capacitance of the first capacitor C1 can be 133 pF, the capacitance of the second capacitor can be 27 pF, the capacitance of the third capacitor C3 can be 133 pF, and the capacitance of the fourth capacitor can be 27 pF.

[0045] Optionally, based on the above embodiment, continue to refer to Figure 6 The first impedance matching unit 220 includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8. The first end of the fifth capacitor C5 is electrically connected to the second end of the second side of the balun transformer 133, the second end of the fifth capacitor C5 is electrically connected to the loop antenna 212, and the sixth capacitor C6 is connected in parallel with the fifth capacitor C5. The first end of the seventh capacitor C7 is electrically connected to the second end of the second side of the balun transformer 133, the second end of the seventh capacitor C7 is electrically connected to the first end of the second side of the balun transformer 133, and the eighth capacitor C8 is connected in parallel with the seventh capacitor C7.

[0046] It is understood that impedance matching can be achieved by adjusting the capacitance of the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8. For example, the capacitance of the fifth capacitor C5 can be 20 pF, the capacitance of the sixth capacitor C6 can be 0.5 pF, the capacitance of the seventh capacitor C7 can be 82 pF, and the capacitance of the eighth capacitor C8 can be 0 pF.

[0047] It should be noted that, because the capacitance of capacitors connected in parallel is added, the first impedance matching unit 220 has two capacitors connected in series and in parallel for the convenience of debugging. Conventional capacitors have a large capacitance interval, and adding two capacitances allows for more parameter adjustments.

[0048] Optionally, based on the above embodiment, continue to refer to Figure 5 The antenna card reader unit 120 includes a first transceiver terminal TX1 and a second transceiver terminal TX2. The filter circuit 131 includes a first inductor L1, an eighth capacitor C8, a second inductor L2, and a ninth capacitor C9.

[0049] A first end of the first inductor L1 is electrically connected to the first transceiver signal terminal TX1, a second end of the first inductor L1 is electrically connected to the second end of the first capacitor C1, and a first end of the eighth capacitor C8 is electrically connected to the second end of the first inductor L1. A first end of the second inductor L2 is electrically connected to the second transceiver signal terminal TX2, a second end of the second inductor L2 is electrically connected to the second end of the third capacitor C3, and a first end of the ninth capacitor C9 is electrically connected to the second end of the second inductor L2.

[0050] Exemplarily, the inductance of the first inductor and the second inductor may both be 470 nH, and the capacitance of the eighth capacitor and the ninth capacitor may both be 120 pF.

[0051] Figure 7 This is a structural diagram of another antenna card reading control module provided by the embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 7 The antenna card reader control module 100 further includes a power supply unit 140. A power output terminal of the power supply unit 140 is electrically connected to a power input terminal of the antenna card reader unit 120 and the main control unit 110.

[0052] Figure 8 This is a schematic diagram of the structure of a first power supply circuit provided in an embodiment of the present utility model. Figure 9 A schematic diagram of the structure of a second power supply circuit provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to Figure 7-8 The power supply unit 140 includes a first power supply circuit 141 and a second power supply circuit 142 .

[0053] In this embodiment of the present invention, the power output terminal includes a first power output terminal of the first power supply circuit 141 and a second power output terminal of the second power supply circuit 142. The power input terminal includes a first power input terminal and a second power input terminal. The first power input terminal of the antenna card reader unit 120, the main control unit 110, and the second power supply circuit 142 are all electrically connected to the first power output terminal. The second power input terminals of the main control unit 110 and the antenna card reader unit 120 are both electrically connected to the second power output terminal.

[0054] Continue to refer Figure 7-8 After the first power supply circuit 141 inputs the external power supply VIN, the first power output end of the first power supply circuit 141 outputs the first voltage VCC1 which is respectively supplied to the antenna card reader unit 120, the main control unit 110 and the second power supply circuit 142. The first voltage VCC1 generates the second voltage VCC2 through the second power supply circuit 142, which is respectively supplied to the main control unit 110 and the antenna card reader unit 120 for operation.

[0055] Optionally, based on the above embodiment, the main control unit 110 includes a serial peripheral control terminal, a serial communication terminal, and an RS485 communication terminal. The serial peripheral control terminal is communicatively connected to the antenna card reader unit 120, and the serial communication terminal and the RS485 communication terminal are both communicatively connected to the laser therapy machine 20.

[0056] It should be noted that in this embodiment of the present invention, the power supply unit 140 is connected to the power distribution board and main control board of the laser therapy machine 20. The power distribution board provides a set of power to the antenna card reader control module 100, and the main control board provides a set of buses for the antenna card reader control module 100 to communicate. The main control unit 110 includes a serial peripheral control terminal that can input signals to the antenna read / write unit 120, and also includes a serial communication terminal and an RS485 communication terminal, with the serial communication terminal serving as the primary communication terminal and the RS485 communication terminal serving as the backup communication terminal.

[0057] In the embodiment of the present invention, the main control unit 110 in the antenna card reading control module 100 uses a serial peripheral control terminal to transmit and receive microwave signals, and the supply of the transmitting voltage can selectively use the first power supply circuit 141 or the second power supply circuit 142.

[0058] This embodiment of the utility model utilizes wireless radio frequency identification (RFID), enabling optical fiber model identification and reading and writing of data. A balun transformer 133 is used to convert differential signals into single-ended signals for transmission and reception. The antenna card reader control module 100 and antenna module 200 are designed separately, requiring only a single coaxial line 330 for connection, allowing for flexible mechanical design. The signal processing unit 130 and the first impedance matching unit 220 are impedance matched based on analog RF simulation. The loop antenna 212 can be customized based on the size of the optical fiber to be identified and the mechanical dimensions of the antenna module 200's installation location. Because the loop antenna 212 utilizes a circular arc shape within each loop of the loop antenna 212, the recognition gain varies minimally within the maximum recognition distance. The antenna gain remains relatively stable across different scanning angles, meaning that the antenna's receiving or transmitting capabilities do not significantly decrease over a wide range of angles, resulting in a more uniform and stable received signal compared to a square antenna. Furthermore, the signal processing unit 130 and the first impedance matching unit 220 make the maximum recognition distance of the loop antenna 212 controllable, preventing false triggering and improving the accuracy and reliability of optical fiber identification detection. The solution of the embodiment of the present utility model can identify a specific optical fiber model without loss, thereby preventing the reuse of optical fibers that have reached the end of their service life from affecting the effect of the laser therapy machine.

[0059] Figure 10 A schematic diagram of the structure of an optical fiber identification system provided by the embodiment of the present utility model, referring to Figure 10 The optical fiber identification system includes the optical fiber identification module 10 of any of the above embodiments and a laser therapy device 20. The laser therapy device 20 includes a controller 21 and an external power supply 22. The controller 21 is communicatively connected to the optical fiber identification module 10, and the external power supply 22 is electrically connected to the optical fiber identification module 10.

[0060] The external power supply 22 may be a power distribution board of the laser therapy machine 20 , and the controller 21 may be a main control board of the laser therapy machine 20 .

[0061] The optical fiber identification system provided by the embodiment of the present utility model includes the optical fiber identification module 10 in any of the above embodiments, and thus has the same beneficial effects. For the contents not described in detail in this embodiment, reference may be made to the optical fiber identification module 10 provided in the above embodiments.

[0062] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A fiber identification module, characterized in that: include: Antenna card reading control module and antenna module; The antenna card reading control module includes a main control unit, an antenna card reader unit and a signal processing unit; the antenna module includes an antenna unit and a first impedance matching unit; The main control unit is communicatively connected to the antenna card reader unit, the antenna card reader unit is further communicatively connected to the signal processing unit, the signal processing unit is further communicatively connected to the first impedance matching unit, and the first impedance matching unit is further communicatively connected to the antenna unit; The antenna unit includes a hollow circuit board and a loop antenna, the hollow circuit board includes a hollow area, each circle of the loop antenna includes an arc shape, and the loop antenna is arranged around the hollow area; A first distance from the edge of the hollow area to the center is greater than the radius of the optical fiber to be identified, and a second distance from the inner side of the ring antenna to the center of the hollow area is greater than the radius of the optical fiber to be identified and is less than or equal to the maximum identifiable distance of the ring antenna.

2. The optical fiber identification module according to claim 1, characterized in that: Also included is a signal transmission module; The signal transmission module includes a first interface, a second interface and a coaxial line; The first interface is provided on the antenna card reading control module, and the second interface is provided on the antenna module; The coaxial line is connected between the first interface and the second interface, and the first impedance matching unit is communicatively connected to the signal processing unit via the second interface, the coaxial line, and the first interface in sequence.

3. The optical fiber identification module according to claim 2, characterized in that: The signal processing unit includes a filtering circuit, a second impedance matching unit and a balun transformer; The antenna card reader unit is communicatively connected to the filter circuit, the filter circuit is communicatively connected to the second impedance matching unit, the second impedance matching unit is communicatively connected to the balun transformer, the balun transformer is communicatively connected to the first impedance matching unit via the first interface, the coaxial line, and the second interface in sequence, and the first impedance matching unit is communicatively connected to the loop antenna; The second impedance matching unit includes a first differential matching circuit and a second differential matching circuit; the first end of the first side of the balun transformer is communicatively connected to the first differential matching circuit, and the second end of the first side of the balun transformer is communicatively connected to the second differential matching circuit; the first end of the second side of the balun transformer is grounded, and the second end of the second side of the balun transformer is communicatively connected to the first impedance matching unit; the first impedance matching unit is communicatively connected to the loop antenna; The first impedance value of the second impedance matching unit is equal to the second impedance values ​​of the first impedance matching unit and the loop antenna, and the third impedance value of the coaxial line; The fourth impedance value of the first differential matching circuit is equal to the fifth impedance value of the second differential matching circuit; and the sum of the fourth impedance value and the fifth impedance value is equal to the first impedance value.

4. The optical fiber identification module according to claim 3, characterized in that: The first differential matching circuit includes a first capacitor and a second capacitor, and the second differential matching circuit includes a third capacitor and a fourth capacitor; A first end of the first capacitor is communicatively connected to a first end of a first side of the balun transformer, a second end of the first capacitor is electrically connected to a first end of the second capacitor, and a second end of the second capacitor is grounded; The first end of the third capacitor is electrically connected to the second end of the first side of the balun transformer, the second end of the third capacitor is electrically connected to the first end of the fourth capacitor, and the second end of the fourth capacitor is grounded.

5. The optical fiber identification module according to claim 3, characterized in that: The second impedance matching unit includes a fifth capacitor, a sixth capacitor, a seventh capacitor and an eighth capacitor; A first end of the fifth capacitor is electrically connected to the second end of the second side of the balun transformer, a second end of the fifth capacitor is electrically connected to the loop antenna, and the sixth capacitor is connected in parallel with the fifth capacitor; The first end of the seventh capacitor is electrically connected to the second end of the second side of the balun transformer, the second end of the seventh capacitor is electrically connected to the first end of the second side of the balun transformer, and the eighth capacitor is connected in parallel with the seventh capacitor.

6. The optical fiber identification module according to claim 4, characterized in that: The antenna card reader unit includes a first signal receiving and transmitting terminal and a second signal receiving and transmitting terminal; the filter circuit includes a first inductor, an eighth capacitor, a second inductor and a ninth capacitor; The first end of the first inductor is electrically connected to the first signal receiving and transmitting end, the second end of the first inductor is electrically connected to the second end of the first capacitor, and the first end of the eighth capacitor is electrically connected to the second end of the first inductor; The first end of the second inductor is electrically connected to the second transceiver end, the second end of the second inductor is electrically connected to the second end of the third capacitor, and the first end of the ninth capacitor is electrically connected to the second end of the second inductor.

7. The optical fiber identification module according to claim 1, characterized in that: The antenna card reading control module also includes a power supply unit; The power output end of the power supply unit is electrically connected to the antenna card reader unit and the power input end of the main control unit.

8. The optical fiber identification module according to claim 7, characterized in that: The power supply unit includes a first power supply circuit and a second power supply circuit; The power output end includes a first power output end of the first power supply circuit and a second power output end of the second power supply circuit; the power input end includes a first power input end and a second power input end; The antenna card reader unit, the main control unit and the first power input end of the second power supply circuit are all electrically connected to the first power output end; The second power input terminals of the main control unit and the antenna card reader unit are both electrically connected to the second power output terminal.

9. The optical fiber identification module according to claim 1, characterized in that: The main control unit includes a serial peripheral control terminal, a serial communication terminal and an RS485 communication terminal; The serial peripheral control terminal is communicatively connected to the antenna card reader unit; The serial communication terminal and the RS485 communication terminal are both connected to the laser therapy machine for communication.

10. A fiber identification system, characterized in that: Comprising the optical fiber identification module and laser therapy machine according to any one of claims 1 to 9; The laser therapy machine includes a controller and an external power supply; The controller is communicatively connected to the optical fiber identification module, and the external power supply is electrically connected to the optical fiber identification module.

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