Adjustable ground verification device and method for electromagnetic wave resistivity logging instrument antenna system

Abstract

The present application relates to the technical field of antenna system design verification, and particularly relates to an electromagnetic wave resistivity logging instrument antenna system adjustable ground verification device and method, comprising processing an antenna model, a ruler and a supporting seat; winding a copper wire coil with a preset number of turns on the antenna model and installing a magnetic conductor; fixing the assembled antenna model on the processed ruler according to a preset antenna arrangement scheme; arranging a connecting cable along the ruler; connecting the connecting cable, and performing functional testing and debugging after the connection is completed; the present application adopts 3D printing to quickly manufacture a PLA or non-magnetic material antenna model prototype, and constructs a modular testing system containing flexibly adjustable antenna position and coil turns, realizes parallel verification of a circuit and a mechanical structure, thereby greatly shortening a research and development cycle and significantly reducing material and processing cost waste caused by repeated design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antenna system design verification, and particularly relates to an adjustable ground verification device and method for an electromagnetic wave resistivity logging instrument antenna system. BACKGROUND

[0002] An electromagnetic wave resistivity logging instrument is a key device for evaluating formation resistivity in oil exploration, and the design of the core antenna system directly determines the detection accuracy and reliability of the instrument. The antenna system is often arranged by multiple transmitting and receiving antennas in a specific spatial configuration, and needs to realize efficient transmission and reception of electromagnetic wave signals in a complex downhole environment. In the traditional design process, the development and verification of antenna structure, spatial layout and electronic circuit often restrict each other, which is a complex process involving multiple disciplines and requiring repeated iterative optimization.

[0003] The existing antenna system design verification method has significant limitations. The final metal mechanical processing part is usually used for circuit testing, resulting in a serial relationship between mechanical processing and circuit development. Once the test results are not ideal, the modification cost is extremely high and the cycle is long. The antenna position is fixed and cannot be adjusted, and the coil parameters are difficult to modify online, which makes the optimization process inefficient and lacks data guidance. In addition, the test platform is rough to build, and the connecting cable is often exposed to the periphery of the antenna, introducing additional electromagnetic interference, which seriously affects the accuracy and reliability of the test data, making the subsequent design optimization lack real and effective basis.

[0004] The present application provides an effective solution for instrument research and development team to verify the function under ground environment by constructing a modular, parameter-adjustable rapid prototyping verification system. A variety of types of non-magnetic material antenna models are quickly manufactured by using 3D printing technology, and a test platform supporting flexible adjustment of antenna position and coil turns is built by combining a scale-marked ruler, a detachable fixing mechanism and an embedded wiring channel. Through the iterative testing method driven by data, the circuit and mechanical structure are developed and verified in parallel, which fundamentally shortens the research and development cycle, reduces the development cost and risk. SUMMARY

[0005] In order to overcome the problems proposed in the above background art, the present application proposes an antenna system design verification device suitable for electromagnetic wave resistivity measuring instruments, which can be used as a detection tool for instruments after production and processing, and can efficiently and accurately test and evaluate the performance indicators (such as gain, impedance matching, self-resonance frequency, etc.) of the finished antenna system. It can also be applied to the design stage of the antenna system. The device can quickly and low-cost verify the feasibility and performance expectation of the design scheme, effectively identify design defects or deviations through simulation of actual working conditions or comparison of test data. This verification capability throughout the design-manufacturing process significantly reduces the risk of repeated modification, rework, and even design failure due to the mismatch between design expectations and actual application results, thereby avoiding the resulting huge research and development costs and production resource waste. It is of great significance to improve the research and development efficiency and product reliability of electromagnetic wave resistivity measuring instruments.

[0006] The technical scheme of the present application is: an adjustable ground verification method for an electromagnetic wave resistivity logging instrument antenna system, comprising the following steps:

[0007] S11: design an antenna according to requirements to obtain an antenna design scheme, wherein the antenna design scheme includes the number of transmitting antennas, the number of receiving antennas, the type of antennas, and a preset antenna arrangement scheme, and the preset arrangement scheme includes the spacing and spatial orientation configuration of the transmitting antennas and the receiving antennas;

[0008] S12: process the antenna model, the ruler, and the support seat according to the number of transmitting antennas, the number of receiving antennas, and the type of antennas in the antenna design scheme;

[0009] S13: wind a copper wire coil with a preset number of turns on the antenna model and install a magnetic conductor to assemble the antenna model;

[0010] S14: fix the assembled antenna model on the processed ruler according to the preset antenna arrangement scheme;

[0011] S15: arrange the connection cable along the ruler and pass the connection cable through the ruler preset perforation;

[0012] S16: connect the connection cable, and after connection, perform functional testing and debugging.

[0013] As a preferred, when assembling the antenna model, the copper wire coil is fixed with a detachable fixing material, wherein the detachable fixing material is one of a cable tie and a polyimide adhesive tape, and after fixing the assembled antenna model on the processed ruler according to the preset antenna arrangement scheme, the antenna model is further subjected to displacement constraint.

[0014] Preferably, the types of the antenna model include horizontal antenna, radial antenna, symmetric slant antenna, slant antenna and cross antenna, and the antenna model is processed by 3D printing, and the material of the antenna model is one of PLA material and other non-magnetic material.

[0015] Preferably, the functional test and debugging include the following steps:

[0016] S21: controlling the transmitting antenna to emit an electromagnetic wave signal;

[0017] S22: controlling multiple receiving antennas to synchronously receive the electromagnetic wave signal emitted by the transmitting antenna, and collecting and recording waveform data of the electromagnetic wave signal;

[0018] S23: comparing and analyzing the waveform data of the electromagnetic wave signal received by the multiple receiving antennas and the electromagnetic wave signal emitted by the transmitting antenna, to obtain phase difference and amplitude attenuation characteristics of the signal;

[0019] S24: based on the obtained phase difference and amplitude attenuation characteristics of the signal, analyzing and adjusting the position of the transmitting antenna, the position of the receiving antenna and the number of turns of the coil;

[0020] S25: repeating steps S21-S24 to perform iterative optimization until the amplitude and phase characteristics of the received signal meet the preset index.

[0021] The antenna system of the electromagnetic wave resistivity logging instrument is an adjustable ground verification device, comprising a support seat, a ruler and an antenna model. The support seat is provided in at least two groups, and the two groups of support seats are arranged at the bottom of the ruler. The antenna model is provided in multiple groups, and the inside of the multiple groups of antenna models is provided with a through hole. The multiple groups of antenna models are sleeved on the ruler through the through hole, and the ruler is provided with a scale mark.

[0022] Preferably, the bottom surface of the support seat is provided with a base, the top surface of the support seat is provided with a fixed block, the top surface of the fixed block is provided with an arc-shaped groove, the inside of the arc-shaped groove is provided with a positioning pin, the positioning pin is provided in multiple groups, the bottom surface of the ruler is provided with multiple positioning holes, and the positioning pin is inserted into the inside of the positioning hole.

[0023] Preferably, the ruler is provided in a cylindrical structure, the side wall of the ruler is provided with a wiring groove, the side of the ruler opposite to the wiring groove is provided with a positioning surface, and the inside side wall of the through hole is provided with a fixed surface opposite to the positioning surface.

[0024] As preferred, the antenna model comprises an antenna body, a magnet conductor and an antenna coil, the through hole is opened in the inside of the antenna body, a plurality of groups of installation grooves are opened on the side wall of the antenna body, each group of antenna models comprises a plurality of groups of magnet conductors, and the plurality of groups of magnet conductors are arranged in the inside of the plurality of groups of installation grooves.

[0025] As preferred, the circuit module is further provided with transmitting circuit and receiving circuit, and the circuit module is arranged at one end of the scale.

[0026] The beneficial effects of the present application are as follows:

[0027] 1. Compared with the prior art which generally relies on overall metal machining and then carries out circuit test, the present application has the defects of long development cycle, high trial and error cost and extremely difficult modification, and the present application innovatively adopts 3D printing to quickly manufacture the antenna model prototype of PLA or non-magnetic material, and a modular test system comprising flexibly adjustable antenna position and coil turns is constructed, parallel verification of the circuit and the mechanical structure is realized, thereby greatly shortening the research and development cycle and significantly reducing the material and processing cost waste caused by repeated design;

[0028] 2. The present application constructs a physical platform which can flexibly adjust parameters and can remain stable during testing by adopting the detachable coil fixing mode of the cable tie or the adhesive tape, the scale graduation positioning and the displacement prevention constraint of the antenna fixing device, and the precision and rapid optimization of the antenna spacing, orientation and electrical parameters are realized by combining the data-driven iterative optimization method based on the phase and amplitude characteristics, thereby greatly improving the efficiency of design verification and the reliability of optimization results;

[0029] 3. The present application constructs a highly integrated and well-shielded test environment by designing the scale structure with internal through hole, special wiring groove and positioning surface, forcibly requiring all connection cables to be built-in in the scale, and integrating the transmitting and receiving circuit modules, thereby fundamentally eliminating the interference of external wiring on electromagnetic signals, ensuring the accuracy and consistency of test data, and providing a key guarantee for obtaining real and reliable optimization results. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The principle structure schematic diagram of the adjustable ground verification device of the electromagnetic wave resistivity logging instrument antenna system of the present application is shown.

[0031] Figure 2 The radial structure schematic diagram of the scale in the adjustable ground verification device of the electromagnetic wave resistivity logging instrument antenna system of the present application is shown.

[0032] Figure 3The radial profile structure schematic diagram of the antenna model in the adjustable ground verification device of the electromagnetic wave resistivity logging instrument antenna system of the application is shown;

[0033] Figure 4 The three-dimensional structure schematic diagram of the antenna model in the adjustable ground verification device of the electromagnetic wave resistivity logging instrument antenna system of the application is shown;

[0034] Figure 5 The design principle diagram of the electromagnetic wave resistivity while drilling instrument in the first embodiment of the application is shown;

[0035] Figure 6 The electromagnetic wave waveform diagram obtained before the adjustment of the antenna position and the number of turns of the coil in the first embodiment of the application is shown;

[0036] Figure 7 The electromagnetic wave waveform diagram obtained after the adjustment of the antenna position and the number of turns of the coil in the first embodiment of the application is shown;

[0037] Figure 8 The antenna position distribution diagram obtained after the functional test and debugging in the first embodiment of the application is shown;

[0038] Figure 9 The plane structure schematic diagram of the electromagnetic wave resistivity while drilling instrument in the first embodiment of the application is shown.

[0039] Marked for explanation: 1, support seat; 2, scale; 3, antenna model; 4, perforation; 9, wiring slot; 10, positioning surface; 11, fixed surface; 12, antenna body; 13, magnet conductor; 14, antenna coil; 15, installation slot. DETAILED DESCRIPTION

[0040] The application will be further described in combination with the drawings and embodiments.

[0041] Please refer to Figures 1-4 The application provides an embodiment: an adjustable ground verification method for an electromagnetic wave resistivity logging instrument antenna system, comprising the following steps:

[0042] S11: antenna design is performed according to requirements to obtain an antenna design scheme, wherein the antenna design scheme comprises the number of transmitting antennas, the number of receiving antennas, the type of antennas and a preset antenna arrangement scheme, and the preset arrangement scheme comprises the spacing and spatial orientation configuration of the transmitting antennas and the receiving antennas;

[0043] S12: the antenna model, the scale and the support seat are processed according to the number of transmitting antennas, the number of receiving antennas and the type of antennas in the antenna design scheme;

[0044] S13: copper wire coils with a preset number of turns are wound on the antenna model and magnet conductors are installed to assemble the antenna model;

[0045] S14: fixing the assembled antenna model on the processed ruler according to the preset antenna arrangement scheme;

[0046] S15: arranging the connecting cable along the ruler and threading the connecting cable through the preset perforation of the ruler;

[0047] S16: connecting the connecting cable, and performing functional test and debugging after the connection is completed.

[0048] In the embodiment, first, the number, type and arrangement scheme of the antennas are determined according to the design requirements; then, the corresponding antenna model, ruler and support are processed; after the coil winding, the magnetic conductor installation and the antenna assembly are completed, the antenna module is fixed on the ruler according to the preset scheme; after the wiring is standardized through the internal perforation of the ruler, system debugging and functional test are performed; through the modular and adjustable physical test platform, parallel verification of circuit design and mechanical structure is realized, cost waste and time delay caused by later design modification are reduced, and the efficiency and reliability of antenna system optimization are effectively improved.

[0049] When assembling the antenna model, the copper wire coil is fixed by using detachable fixing materials, wherein one of a cable tie and a polyimide adhesive tape is used, and after the assembled antenna model is fixed on the processed ruler according to the preset antenna arrangement scheme, the antenna model is also subjected to displacement prevention constraint.

[0050] In the embodiment, the coil is fixed by using detachable fixing materials such as a cable tie or a polyimide adhesive tape during the antenna model assembly process, and a special displacement prevention constraint is applied after the antenna module is installed on the ruler according to the preset arrangement scheme, so that the number of turns of the coil is quickly and flexibly adjusted, the stability of the spatial position of the antenna during the test process is ensured by combining the displacement prevention constraint, the efficiency of the iterative optimization of the antenna parameters is significantly improved, the reliability and consistency of the test data are ensured, and repeated debugging and material waste caused by displacement errors are effectively avoided.

[0051] When the antenna model is processed, the types of the antenna model include horizontal antenna, radial antenna, symmetric diagonal antenna, diagonal antenna and cross antenna, and the antenna model is processed by 3D printing, and the material of the antenna model is one of PLA material and other non-magnetic materials.

[0052] In the embodiment, the rapid and low-cost prototype manufacturing of complex structure antennas is realized by 3D printing, and the application of non-magnetic materials completely eliminates the interference of the model itself on the electromagnetic field, ensuring the accuracy and reliability of the test data, and providing an efficient physical implementation basis for the parallel comparison and performance optimization of various antenna structures.

[0053] In the functional test and debugging, specifically comprising:

[0054] S21: controlling the transmitting antenna to emit an electromagnetic wave signal;

[0055] S22: controlling multiple receiving antennas to synchronously receive the electromagnetic wave signal emitted by the transmitting antenna and collect waveform data of the electromagnetic wave signal;

[0056] S23: comparing and analyzing the waveform data of the electromagnetic wave signal received by the multiple receiving antennas and the electromagnetic wave signal emitted by the transmitting antenna, to obtain phase difference and amplitude attenuation characteristics of the signal;

[0057] S24: based on the obtained phase difference and amplitude attenuation characteristics of the signal, analyzing and adjusting the position of the transmitting antenna, the position of the receiving antenna, and the number of turns of the coil;

[0058] S25: repeating steps S21-S24 for iterative optimization until the amplitude and phase characteristics of the received signal meet the preset indicators.

[0059] In the embodiment, as described above, the functional test and debugging process specifically comprises: controlling the transmitting antenna to emit a signal and synchronously collecting waveform data by multiple receiving antennas; dynamically analyzing and adjusting the antenna position and the number of turns of the coil by comparing the phase difference and amplitude attenuation characteristics of the transmitted and received signals; continuously correcting the parameters by using the iterative optimization method until the preset indicators are met; by establishing a closed-loop optimization mechanism of test-analysis-adjustment, the precise and rapid debugging of the antenna system parameters is realized, which not only greatly improves the efficiency of electromagnetic wave propagation characteristic optimization, but also effectively avoids the blindness of relying on experience debugging in the traditional method through dynamic adjustment driven by data, significantly improving the reliability and verification efficiency of instrument design.

[0060] The antenna system adjustable ground verification device of electromagnetic wave resistivity logging instrument comprises a support seat 1, a ruler 2 and an antenna model 3, the support seat 1 is provided as at least two groups, two groups of the support seat 1 are respectively arranged at both ends of the bottom surface of the ruler 2, the antenna model 3 is provided as multiple groups, the inside of each of the multiple groups of the antenna model 3 is provided with a through hole 4, and each of the multiple groups of the antenna model 3 is sleeved on the ruler 2 through the through hole 4.

[0061] The ruler 2 is supported by the support seat 1, so that the ruler 2 and the antenna model 3 on the ruler 2 are erected in the air, different measured objects can be placed below or beside the antenna model 3 for ground performance calibration and testing of electromagnetic wave resistivity, and the scale mark on the ruler 2 is used for measuring the distance between each antenna model 3, which is easy to install according to the design scheme and convenient for recording during the debugging process and after the debugging is completed.

[0062] The bottom surface of the support seat 1 is provided with a base, the top surface of the support seat 1 is provided with a fixed block, the top surface of the fixed block is provided with an arc-shaped groove, the inside of the arc-shaped groove is provided with a positioning pin, the positioning pin is provided in multiple groups, the bottom surface of the ruler 2 is provided with multiple positioning holes, and the positioning pin is inserted into the inside of the positioning hole.

[0063] Wherein, the support seat 1 can be supported by the base and fixed on the ground, the arc-shaped groove can be used for positioning the ruler 2 and cooperating with the cylindrical structure of the ruler 2 to better fix the ruler 2, and the positioning pin and the positioning hole opened on the bottom surface of the ruler 2 can completely fix the ruler 2 and facilitate disassembly and installation and disassembly of the antenna module.

[0064] The ruler 2 is provided in a cylindrical structure, the sidewall of the ruler 2 is provided with a wiring slot 9, one side of the ruler 2 relative to the wiring slot 9 is provided with a positioning surface 10, and the inside sidewall of the perforation 4 is provided with a fixed surface 11 opposite to the positioning surface 10.

[0065] Wherein, when the connecting cable is penetrated, the connecting cable can pass through the wiring slot 9 without passing through the outer surface of the antenna model 3, so as not to affect the signal transmission, and the positioning surface 10 and the fixed surface 11 can prevent the antenna model 3 from rotating on the ruler 2 and affecting the test result.

[0066] The antenna model 3 comprises an antenna body 12, a magnet conductor 13 and an antenna coil 14, the perforation 4 is arranged in the inside of the antenna body 12, a plurality of installation grooves 15 are arranged on the sidewall of the antenna body 12, each group of antenna models 3 comprises a plurality of magnet conductors 13, the plurality of magnet conductors 13 are arranged in the plurality of installation grooves 15 respectively, and the antenna coil 14 is wound outside the magnet conductor 13.

[0067] Wherein, the antenna body 12 is the core support structure of the antenna model 3, the magnet conductor can be accurately positioned through the installation groove 15, and the magnet conductor 13 is used for efficiently converging and guiding magnetic force lines and increasing the signal of the antenna coil 14.

[0068] As preferred, the circuit module is further provided with a transmitting circuit and a receiving circuit, and the circuit module is arranged at one end of the ruler 2.

[0069] Wherein, in the arrangement of the finished instrument, due to the limitation of the internal space, the electronic circuit part and the transmitting coil are generally arranged separately, and in the test process, the limitation is not received, but the emission direction of the electromagnetic wave is basically radial emission electromagnetic wave, so the circuit module is placed at both ends of the ruler 2, and the interference of the circuit module on the electromagnetic field is reduced.

[0070] Embodiment one

[0071] Please refer to Figures 5-9 , when electromagnetic wave propagates in the formation, the change of phase and amplitude is mainly affected by the formation conductivity (the reciprocal of resistivity) and the formation dielectric constant. The formation conductivity reflects the ability of the formation to conduct current, and the formation dielectric constant reflects the ability of the formation to accumulate charge. The electromagnetic wave resistivity measurement while drilling is an indirect measurement method, which measures the response of electromagnetic wave propagation in the formation. Generally, one transmitting antenna and two receiving antennas are used to measure the phase difference and amplitude attenuation of the induced electromotive force in the formation, and then the phase difference and amplitude ratio corresponding to the formation resistivity value are obtained through data processing. When the electromagnetic wave passes through the conductive formation, the signal amplitude will appear exponential decay, and the signal decay will also be different because the distance between the near receiving coil R1 and the far receiving coil R2 and the transmitting coil T1 is different. Therefore, the electromagnetic wave signal amplitude and phase measured by the near and far receiving coils are also different.

[0072] According to the characteristics of this principle, we design and develop electromagnetic wave resistivity while drilling instrument. This instrument has 12 electromagnetic coils, six of which are transmitting antennas and six are receiving antenna coils. The arrangement of the coils is shown in the attached Figure 5 .

[0073] As shown in the attached Figure 5 , there are 12 coils distributed on the instrument, R coils are receiving coils and T coils are transmitting coils. In the design and use process, generally one coil transmits and two coils receive, or one coil transmits and six coils receive. The distance between the receiving coil and the transmitting coil is different, and the received signal phase is also different. In the implementation process of the circuit system, the error of electronic components, the error between the design value and the actual value of the electromagnetic coil, and the error of the processing technology will all affect the integrity of the signal. Therefore, the circuit system and the coil need to be functionally verified and tested before the drill pipe is processed, and the corresponding adjustment is made according to the test results. In the actual development process, different antenna modules are designed to be cut off, 3D printing is used to replace the materials, and after the processing is completed, all the antenna segments are arranged according to the design scheme and linked with the circuit system. The arrangement diagram is shown in the attached Figure 6 .

[0074] After the installation is completed according to the design drawing, functional testing and debugging are performed, and the antenna position and circuit system are not adjusted. The signal is transmitted by T1 antenna, and received by R1 and R2 antennas. The initial test signal is shown in the attached Figure 7 . After the adjustment of the circuit system and the antenna position and number of turns, the test pattern is shown in the attached Figure 8 .

[0075] After the adjustment of the circuit, it can be seen that Figure 8 Compared with Figure 7 , the amplitude of the received signal is obviously improved, and because of the movement of the position, the phase is also changed. Through this method, the other antenna positions are also adjusted and the final position is determined, as shown in Figure 9 .

[0076] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. An antenna system adjustable ground verification device for electromagnetic wave resistivity logging instruments, characterized in that: The utility model relates to an antenna model fixing device, including support seat (1), scale (2) and antenna model (3), support seat (1) is provided as at least two groups, two groups support seat (1) is provided respectively at scale (2) bottom surface both ends, the inside of multiple groups antenna model (3) is all provided with perforation (4), multiple groups antenna model (3) all through the perforation (4) sleeve set on scale (2), scale (2) is provided with scale mark, the bottom surface of support seat (1) is provided with base, the top surface of support seat (1) is provided with fixed block, the top surface of fixed block is provided with arc groove, the inside of arc groove is provided with positioning pin, positioning pin is provided as multiple groups, the bottom surface of scale (2) is provided with multiple groups positioning hole, positioning pin is inserted in the inside of positioning hole, scale (2) is provided as cylinder structure, the sidewall of scale (2) is provided with wiring slot (9), the side of scale (2) is provided with locating surface (10) relative to wiring slot (9), the inside sidewall of perforation (4) is provided with fixed surface (11) opposite locating surface (10), antenna model (3) includes antenna body (12), magnet conductor (13) and antenna coil (14), the inside of perforation (4) is provided in antenna body (12), the sidewall of antenna body (12) is provided with multiple groups installation groove (15), every group antenna model (3) includes multiple groups magnet conductor (13), multiple groups magnet conductor (13) are provided in multiple groups installation groove (15) respectively, antenna coil (14) is wound on the outside of magnet conductor (13), still include circuit module, the transmitting circuit and receiving circuit are provided on circuit module, and circuit module is provided in one end of scale (2).

2. A method of ground-based verification of the antenna system of an electromagnetic wave resistivity logging instrument, characterized in that: It comprises the following steps: S11: according to the requirement, antenna design is carried out to obtain an antenna design scheme, wherein the antenna design scheme comprises the number of transmitting antennas, the number of receiving antennas, the type of antennas and a preset antenna arrangement scheme, the preset arrangement scheme comprises the spacing and spatial orientation configuration of the transmitting antennas and the receiving antennas; S12: according to the number of transmitting antennas, the number of receiving antennas and the type of antennas in the antenna design scheme, the antenna model, the scale and the support seat are processed; S13: a copper wire coil with a preset number of turns is wound on the antenna model, and a magnet conductor is installed to assemble the antenna model; S14: according to the preset antenna arrangement scheme, the assembled antenna model is fixed on the processed scale; S15: a connection cable is arranged along the scale, and the connection cable is guided through the preset perforation of the scale; S16: the connection cable is connected, and after the connection is completed, functional testing and debugging are performed; When assembling the antenna model, a detachable fixing material is used to fix the copper wire coil, wherein the detachable fixing material is one of a cable tie and a polyimide adhesive tape, and after the assembled antenna model is fixed on the processed scale according to the preset antenna arrangement scheme, a displacement constraint is applied to the antenna model. When the antenna model is processed, the antenna model is processed by 3D printing, and the antenna model is one of PLA material and other non-magnetic materials. When the functional test and debugging are performed, specifically comprising: S21: controlling the transmitting antenna to emit an electromagnetic wave signal; S22: controlling multiple receiving antennas to synchronously receive the electromagnetic wave signal emitted by the transmitting antenna, and collecting and recording waveform data of the electromagnetic wave signal; S23: comparing and analyzing the waveform data of the electromagnetic wave signal received by the multiple receiving antennas and the electromagnetic wave signal emitted by the transmitting antenna, to obtain phase difference and amplitude attenuation characteristics of the signal; S24: based on the obtained phase difference and amplitude attenuation characteristics of the signal, analyzing and adjusting the position of the transmitting antenna, the position of the receiving antenna, and the number of turns of the coil; S25: repeating steps S21-S24 for iterative optimization until the amplitude and phase characteristics of the received signal meet the preset index.

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