76 results about "Electromagnetic wave transmission" patented technology

To provide a dielectric constant measuring method for reducing an analysis error of a dielectric constant in measurement by a free space method.SOLUTION: The method includes a step of preparing a first complex electric field distribution on an incident plane P1 of a dielectric sample 33, a step of preparing a second complex electric field distribution on an emission plane P2 of an electromagnetic wave transmitted from a receiving horn antenna and assumed to be incident on the dielectric sample 33 in a direction opposite to an emission direction of the electromagnetic wave, a step of calculating an angular spectrum distribution on a wave number space by inverse Fourier transformation of the first complex electric field distribution, a step of measuring a thickness of the dielectric sample 33 in a direction along an electromagnetic wave transmission direction, a step of calculating a reference of a complex electric field distribution which is a complex electric field distribution when the electromagnetic wave propagates in a free space by a distance corresponding to the thickness, and a step of obtaining a third complex electric field distribution of the electromagnetic wave propagating in the emission direction on the emission plane P2.SELECTED DRAWING: Figure 2

Various embodiments of the present disclosure relate to a low-E film to which an electromagnetic wave transmission pattern of a specific frequency is applied. The low-E film comprises: an insulating layer made of an insulating material; and a metal coating layer including a metal or metal oxide coated on one surface of the insulating layer. The metal coating layer has a first pattern formed by removing a portion of the metal coating layer, and the first pattern includes a pattern having a plurality of oval surfaces of an identical shape within a rectangular unit cell, and the pattern having the plurality of oval surfaces is arranged with the long axes of the respective oval surfaces at constant angles, and the long axes of the pattern having the oval surfaces or the extension lines of the long axes meet at one intersection point located at the middle point of the unit cell.

This application belongs to the field of microwave absorber technology, and particularly relates to a frequency-selective microwave absorber. The frequency-selective absorber includes a support layer having a first surface and a second surface disposed opposite to each other; a first dielectric layer bonded to the first surface; a second dielectric layer bonded to the second surface; a loss layer bonded to the side of the first dielectric layer away from the first surface to absorb electromagnetic waves of a preset frequency band; and a transmission layer bonded to the side of the second dielectric layer away from the second surface, allowing electromagnetic waves of the preset frequency band to pass through. The support layer, the first dielectric layer, the second dielectric layer, the loss layer, and the transmission layer are all transparent structures. This application can solve the technical problem in the prior art where frequency-selective absorbers lack optical transparency.

The utility model discloses an electrostatic shielding aluminum shell resistor which comprises an electrostatic aluminum shell resistor machine, the electrostatic aluminum shell resistor machine comprises a shielding shell, a first sliding groove is formed in the upper end of the interior of the shielding shell, and a second sliding groove is formed in the lower end of the interior of the shielding shell. The interior of the first sliding groove is slidably connected with a first sliding rod, the interior of the second sliding groove is slidably connected with a third sliding rod, and the shielding shell is tightly connected with the sliding rods of the resistor body to form a relatively closed environment, so that propagation of electromagnetic waves penetrating through pores and gaps is reduced; the shielding effectiveness on a high-frequency electromagnetic field can be remarkably enhanced, electromagnetic interference is reduced, and the performance and stability of the whole circuit are improved.

The application provides an electromagnetic transmittance enhancer, and belongs to the technical field of microwave frequency electromagnetic wave regulation and control, comprising a plurality of super units arranged in a rectangular shape. Each super unit comprises a dielectric base, a dielectric substrate and a metal patch, the dielectric substrate is vertically arranged at the middle position on the top of the dielectric base; the metal patch is in an inverted L shape and is arranged on one side of the dielectric substrate; when the electromagnetic wave in the air is incident on the upper surface of the electromagnetic transmittance enhancer, the plurality of super units will simultaneously resonate, the electric field component of the transmitted electromagnetic wave will excite electric dipoles of different lengths in the horizontal and vertical directions of the metal patch, and the electric dipoles will interfere with the incident electromagnetic wave to cancel each other out, so that the resonance zero point of the synthesized dipoles points to the direction of the reflected wave, and the electromagnetic wave is transmitted forward from the gap channel between adjacent units. The electromagnetic transmittance enhancer provided by the application can improve the transmittance of electromagnetic wave transmission to the medium under a large incident angle.

A plasma generator by means of a resonant waveguide is disclosed. The plasma generator comprises: an annular or elliptical central waveguide that includes a plurality of slots on the inner side surface thereof; a first incident waveguide that is tangentially connected to the central waveguide to enable electromagnetic wave communication; an electromagnetic wave supply unit that transmits electromagnetic waves to the incident waveguide; and a plasma chamber that has an electromagnetic wave incident window which is positioned on an outlet side of the slots to seal the inside of the central waveguide, and through which electromagnetic waves introduced through the slots may be radiated to the outside.

This invention relates to the field of measurement while drilling (MWD) technology, specifically a drill collar-type electromagnetic wave transmission wireless MWD downhole tool. It includes a drill collar body, a nested body, a battery module, and a measurement circuit module. A hollow nested body is fitted inside the upper part of the drill collar body. Several first grooves are spaced circumferentially along the outer side of the center of the nested body, each containing a battery module. The measurement circuit module includes a drive module and a sensor module. This invention features a reasonable and compact structure. This drill collar-type electromagnetic wave transmission wireless MWD downhole tool is simple and efficient to operate. It can be docked or disassembled on-site like conventional drilling tools, eliminating the need for cumbersome work such as connecting and tightening measurement sections, measuring angle differences, lifting, wellhead installation, and key alignment with other measurement systems. This saves at least one hour of time. Furthermore, it is handled similarly to conventional drilling tools in terms of transportation and flushing, requiring no meticulous maintenance.

The application discloses a method, system, device, medium and product for ionospheric modeling based on detection data, relates to the field of electromagnetic wave transmission and ionospheric modeling, and comprises the following steps: acquiring GNOS-II detection data of different dates according to a space environment, and screening effective rays based on the correction degree of electron density of the detection data; acquiring grid points through by the effective rays based on a space-based ionospheric inversion method according to corresponding data of the effective rays; determining total electron content of the space-based ionospheric inversion by using a dual-frequency calculation method according to the corresponding data of the effective rays; performing horizontal constraint and vertical constraint on global ionospheric electron density distribution by using a ground-based ionospheric inversion method according to the grid points through by the effective rays and the total electron content of the space-based ionospheric inversion; outputting the constrained global ionospheric electron density distribution to obtain a global ionospheric model. The application realizes real-time high-precision ionospheric construction in a global range.

The application discloses a UWB high-precision positioning method and system, comprising the following steps: obtaining the one-way radio electromagnetic wave transmission time difference obtained by communication between each base station and a tag in a current single ranging stage, the coordinate information of each base station and the antenna delay compensation curve obtained by pre-solution communication between each base station and the tag; calculating the distance between each base station and the tag according to the obtained data; and determining the real-time position coordinates of the tag according to the calculated distance between each base station and the tag. Advantages: the ranging source data precision between the base station and the tag is improved, and finally the UWB positioning precision is improved.

The application belongs to the field of electromagnetic compatibility, and particularly relates to a characteristic impedance calculation method of an asymmetric transverse electromagnetic cell (ATEM cell) based on a static field theory. First, a simplified modeling is performed on a middle cross section of a main transmission section of the ATEM cell, and then according to basic principles of electromagnetic fields, positive and negative charge distributions of inner and outer conductors under electrostatic field conditions are calculated. Then, the capacitance of the cross section is calculated according to the calculated charge amount, and finally, the characteristic impedance of the middle cross section of the main transmission section of the ATEM cell is calculated by using a characteristic impedance formula of a lossless transmission line. The characteristic impedance of the middle cross section of the main transmission section of the ATEM cell obtained by the method has a small error compared with the actually tested characteristic impedance, and has practical engineering application significance.

The invention relates to the technical field of composite material damage evaluation and performance prediction, and discloses a thermal-mechanical-chemical-electromagnetic coupling-based integrated calculation method for ablation damage and electromagnetic wave transmission performance of a quartz fiber reinforced composite material under laser irradiation. The method comprises the following steps: acquiring verification data through a laser ablation experiment and an electromagnetic wave transmission test, establishing a laser damage numerical model of the quartz fiber reinforced composite material, and correcting a simulation calculation result by using the verification data; secondly, extracting features in a simulation calculation result, performing electromagnetic wave-transparent numerical calculation based on an established electromagnetic wave-transparent performance numerical model, and verifying and correcting through experimental data again; and finally, a verified integrated calculation method is formed. According to the method, organic coupling and integrated prediction from physical and chemical damage to electromagnetic performance degradation are realized, the problems of model separation, excessive geometric simplification, dependence on high-cost experiments and the like in the prior art are solved, and the prediction precision, efficiency and engineering applicability are remarkably improved.

The application discloses a dual-mode dual-circularly polarized antenna array, which comprises a dual-mode feed network and a radiation network stacked in order from bottom to top, the dual-mode feed network is used for transmitting electromagnetic waves in the form of TE10 mode and TEM mode input thereto to the radiation network, and the radiation network is used for radiating electromagnetic waves transmitted by the dual-mode feed network to free space, the dual-mode feed network is a hybrid feed network based on a hollow waveguide structure and an SISL structure, and the radiation network is a hybrid radiation network based on a partition structure and a stepped horn structure; the dual-mode dual-circularly polarized antenna array has the advantages of low profile, low sidelobe, simple structure and capability of being applied to a high-gain scene.

This application relates to a dual-band frequency selective surface structure, in which an aerogel layer serves as the intermediate dielectric layer, and two single-level frequency selective surface units are arranged on opposite sides. Each single-level frequency selective surface unit is formed by two ceramic layers sandwiching a periodic metal structure, thus forming a coupled structure of a dual-layer frequency selective surface. This coupled structure can improve the selectivity of the frequency response to electromagnetic waves, thereby effectively shielding electromagnetic waves outside the operating frequency band. The combination of ceramic and aerogel layers can ensure the transmission stability of electromagnetic waves during incident, maintaining a stable electromagnetic transmission response even when electromagnetic waves are incident at large angles. At the same time, it can achieve low-loss transmission of electromagnetic waves within the operating frequency band, effectively balancing the angular stability and high frequency selectivity of dual-band electromagnetic wave transmission. This solves the technical problems of existing multi-frequency selective surfaces having poor angular stability, poor out-of-band suppression, and the inability to simultaneously achieve both angular stability and high selectivity.

This invention discloses a method and system for detecting internal defects in tunnel lining based on a radar antenna, belonging to the field of data measurement technology. The method includes: S1, setting a guide rail on the lining surface to couple a radar antenna to move at a constant speed; S2, triggering multi-frequency electromagnetic wave transmission at a fixed spatial interval and receiving the echo; S3, setting a reference medium block to collect calibration signals and calculate the gain coefficient; S4, applying gain compensation and separating the dataset by frequency; S5, determining the depth of the structural reflection interface based on the first dataset; S6, using this depth as a benchmark to extract candidate anomaly clusters within a preset depth range in the second dataset; S7, calculating the spatial energy concentration E and waveform phase consistency P index of each cluster, and jointly determining the defect. This invention has the advantages of stable constraints, multi-frequency defect identification, and anti-interference.

The present invention provides a wiring board, module, and image display device that can improve the connectivity between power supply lines and power supply units. [Solution] The wiring board 10 comprises a substrate 11 including a first surface 11a and a second surface 11b located opposite the first surface 11a, a plurality of mesh wiring sections 20 arranged spaced apart from each other on the first surface 11a of the substrate 11, and a power supply section 40 electrically connected to the mesh wiring sections 20. The wiring board 10 has an electromagnetic wave transmission and reception function. The substrate 11 is transparent. The mesh wiring sections 20 are configured as antennas. A plurality of linearly extending first notches 45 are formed in the power supply section 40.

The invention relates to the technical field of electric heating materials, and discloses an electric heating element with wave-transparent performance and a preparation method thereof.Graphene inorganic fiber fabric is adopted as a conductive heating substrate, so that the electric heating element has excellent electric heating performance, the transmission capacity of the electric heating element to electromagnetic waves is remarkably improved, and the dual requirements of invisibility and deicing are met; in the preparation method, a forward transmission coefficient obtained by a vector network analyzer is introduced, and a surface resistance, an electrode size and a power density calculation model are combined, so that the number of partitions and electrode structure parameters are scientifically determined, and the whole machine is ensured to work stably under the conditions of input voltage and target power; a heating path is accurately designed through an equivalent parallel resistance model, so that the heat uniformity and the response speed are improved; and the cross section area of the electrode is determined by combining international electronic design standards to ensure structural safety and thermal stability.

The utility model relates to the technical field of electromagnetic wave conduction, in particular to a coaxial-waveguide power synthesis device, which comprises a waveguide tube, an inner conductor and a coaxial, the waveguide tube comprises an open end and a closed end, the coaxial penetrates through the closed end and is connected with the inner conductor, the coaxial-waveguide power synthesis device further comprises a short-circuit block, one end of the short-circuit block is connected with the closed end, and the other end of the short-circuit block is connected with the inner conductor. One end of the waveguide tube is connected with the closed end, the other end of the waveguide tube is connected with the inner conductor, the inner conductor, the closed end and the inner wall of the waveguide tube are arranged at intervals, and the coaxial-waveguide power synthesis device can transmit heat of the inner conductor to the waveguide tube so as to dissipate the heat, reduce reflection and improve electromagnetic performance.

The application discloses a circuit-to-waveguide conversion structure, comprising: a waveguide and a dielectric substrate, the waveguide is fixedly connected with the dielectric substrate, the waveguide is provided with a waveguide port for energy transfer with the dielectric substrate, an energy limiting part is provided around the waveguide port and is inwardly recessed, the energy limiting part is connected with the dielectric substrate to form a cavity, the opposite upper space of the cavity presents a high impedance surface to electromagnetic waves of a target working frequency band, the high impedance surface can inhibit the propagation of electromagnetic waves in the gap between the upper surface of the dielectric substrate and the lower surface of the waveguide, the transmission of space electromagnetic waves is inhibited, the dielectric substrate is provided with a circuit transmission line and a quasi-waveguide feeding part, the quasi-waveguide feeding part is oppositely arranged with the waveguide port, the end of the circuit transmission line is connected with the quasi-waveguide feeding part, and the quasi-waveguide feeding part is used for transmitting the energy on the circuit transmission line to the quasi-waveguide feeding part and generating excitation, and the electromagnetic wave transmission mode of the quasi-waveguide feeding part is consistent with the electromagnetic wave transmission mode in the waveguide.

To provide a signal transmitter / receiver capable of achieving both target detection performance and reduction of erroneous detection.SOLUTION: A signal transceiver comprising: a control circuit; an antenna body including an antenna element group that is an assembly of a plurality of antenna elements; and an electromagnetic wave absorber, wherein the electromagnetic wave absorber and the antenna body have all of the following features 1 to 3. Feature 1: An angle φ formed between the electromagnetic wave absorber and the antenna body surface is π / 4 or more and 3 π / 4 or less. Feature 2: An electromagnetic wave absorber is installed toward an electromagnetic wave transmission direction of the antenna body surface. Feature 3: The following expressions 1 and 2 are satisfied, where A (k) is a return loss at a peak top when an electromagnetic wave is incident on the electromagnetic wave absorber from the antenna body at an incident angle k, and θ is an angle formed by a traveling direction of the electromagnetic wave transmitted by the antenna body and a direction of a main side lobe. A (π / 2 - θ)> A (2 π / 3 - θ) Expression 1 A (π / 2 - θ)> A (π / 3 - θ) Expression 2 SELECTED DRAWING: Figure 1

The utility model discloses a shielding module, a controller and computer equipment. The shielding module is composed of three main parts: an integrated component, an insulating layer and a shielding layer. Wherein the insulating layer is covered on the integrated component, and the shielding layer is covered on the insulating layer. Specifically, the integrated component is responsible for data transmission and / or data processing. The insulating layer is used for insulating the integrated assembly so as to prevent current leakage and short circuit. And the shielding layer is used for shielding external electromagnetic interference and ensuring stable operation of the integrated assembly, so that the electromagnetic compatibility of the whole module is improved. According to the shielding module, electromagnetic wave transmission can be effectively inhibited, good electromagnetic compatibility is provided, the material and processing cost can be remarkably reduced, the product weight and size are reduced, and therefore portability and installation flexibility are improved.

This invention discloses a multi-band microstrip patch antenna, relating to the field of antenna technology. The multi-band microstrip patch antenna includes a rectangular patch antenna, a dielectric substrate, an air layer, a metal ground plane, and a coaxial feed line. The rectangular patch antenna is located on one side of the dielectric substrate, the metal ground plane is located on the other side, and the air layer is located between the dielectric substrate and the metal ground plane. The rectangular patch antenna includes multiple concentric rings, curved fractals, a curved flow, and a microstrip feed line. Curved fractals are applied to the outer ring of each concentric ring, and a magnetic cuboid is located on the rectangular patch antenna. Signals enter the multiple concentric rings and curved flow with curved fractals on the microstrip patch antenna via the coaxial feed line. Compared to existing antennas, the above-described multi-band microstrip patch antenna can achieve multi-band electromagnetic wave transmission and reception in the low-frequency band, and it has a simple structure, multiple functions, is easy to manufacture, and has low manufacturing costs.

The application discloses an electromagnetic wave non-reciprocal transmission structure based on light-excited graphene and a transmission method thereof. The structure is composed of silicon rods with different widths placed on a silicon / silicon dioxide substrate, and large-area CVD graphene is transferred to the structure to form a graphene super surface structure. Due to the asymmetry of the structure and the excitation of the nonlinear Kerr effect, the transmission efficiency of electromagnetic waves is significantly related to the incident direction of signal light. By optimizing the structure parameters, the light-excited graphene super surface structure based on the light-excited graphene super surface structure shows a large positive and negative transmission ratio. The device structure is simple and compact, the required incident laser intensity is only 80kW / cm 2 , and is relatively easy to realize in experiments. By utilizing the optical adjustable function of graphene, the working frequency band of the non-reciprocal device can be effectively controlled, thereby flexibly realizing the optical isolation function.

A radome 1 comprises a radome body 2 formed of an electromagnetic-wave transmitting first resin base material, a snow-melting base 3 formed of an electromagnetic-wave transmitting second resin base material having a refractive index mutually matching the refractive index of the first resin base material, and a heater wire 4 laid in an electromagnetic-wave transmitting region R of the snow-melting base 3 and secured to the snow-melting base 3. A recess part 21 recessed in an electromagnetic-wave transmitting direction is formed in a local region of the radome body 2 covering the electromagnetic-wave transmitting region R. The snow-melting base 3 is fitted in the recess part 21 in such a manner as to bury the heater wire 4 internally. It is possible to prevent breakage and failure of a snow-melting part by eliminating a snow-melting part wholly projecting from a radome body locally.

The invention discloses a robot dexterous hand liquid identification method and device based on electromagnetic wave transmission, and belongs to the technical field of intelligent and robots. According to the device, a flexible ultra-wideband antenna array is integrated on a dexterous finger, electromagnetic waves of a specific frequency band are emitted to penetrate through a liquid container, returned penetrating signals are captured, and the dielectric constant of liquid is calculated according to the attenuation intensity and phase shift of the penetrating signals; and realizing non-contact identification of the to-be-detected liquid in combination with a pre-established database of the mapping relationship between the to-be-detected liquid types and the dielectric constants. The technical bottleneck that a traditional robot arm cannot sense liquid attributes in the grabbing process is broken through, wireless sensing and dexterous hand operation are combined, and the robot arm is suitable for the fields of storage quality inspection, medical detection, smart home and the like and has the remarkable advantages of being low in cost, non-invasive, real-time in response and the like.

The invention provides a multi-mode linearly-modulated electromagnetic structure which comprises a metamaterial base body, a plurality of channels arranged at intervals are arranged in the thickness direction of the metamaterial base body, and controllable adjusting media are arranged in the channels. According to the multi-mode electromagnetic structure capable of being linearly modulated, geometric reconstruction of an electromagnetic response structure of the structure is completed by adjusting the content of a medium in a channel, and then the transmission and cut-off states of the structure are changed. The invention provides a multi-mode linearly-modulated electromagnetic structure, a method of injecting / discharging liquid in a channel in a segmented and partitioned manner is adopted, compared with a traditional diode loading method, a new design thought is introduced, and linear adjustment of electromagnetic wave transmission, reflection and absorption capacity is facilitated.

The invention discloses a terahertz reconfigurable intelligent surface based on a non-uniform circular ring coupling structure, and belongs to the technical field of electromagnetic wave transmission functional devices. Comprising a plurality of antenna units which are periodically arranged in the same plane and a substrate dielectric substrate, the antenna units are orthogonally arranged on a plane perpendicular to a terahertz wave incident plane, and each antenna unit sequentially comprises a metal disc on the upper surface, a non-uniform coupling metal circular ring diode switch control layer on the lower surface and a metal disc on the lower surface from top to bottom in the incident direction. The metal structure on the inner side of the control layer is in horizontal mirror symmetry; the non-uniform coupling metal ring diode switch control layer is provided with channel groups which are adjacent to each other and form 90 degrees, each channel group comprises a channel I, a channel II, a channel III and a channel IV, and a diode I and a diode II are arranged at the midpoints of the channel III and the channel IV on the right side and are attached to the inner side metal disc and the outer side metal structure. According to the invention, a high-efficiency ultra-wideband electric control phase shift effect is realized, and unit independent coding control is realized through inverted feeding of the phase shift structure.

The embodiment of the invention provides an antenna structure and a wearable device, and aims to reduce loss during electromagnetic wave transmission. According to the wearable device provided by the invention, an antenna structure comprises a first branch knot, a second branch knot and a third branch knot; the first branch knot and the second branch knot are located on the same side of the third branch knot and arranged in parallel. The length of the first branch knot is 70%-130% of the length of the second branch knot, electromagnetic waves generated by the first branch knot and electromagnetic waves generated by the second branch knot counteract each other, and when the wearable device is worn on the head of a user, the included angle between the electric field polarization direction of the electromagnetic waves generated by the third branch knot and the horizontal plane is 30-80 degrees. An included angle (shown as an angle A in figure 8) between the maximum radiation direction of the electromagnetic wave generated by the third branch knot and the horizontal plane is 30-80 degrees; and in the radiation direction, the loss during electromagnetic wave transmission is minimum, so that the connection stability between the wearable equipment and the communication equipment is improved.

The utility model discloses a lossless moisture content testing device for self-weight deposition of sludge. The lossless moisture content testing device comprises a deposition assembly, a drainage assembly, a shell and a testing assembly, the sedimentation column is used for simulating the self-weight deposition process of the high-water-content dredged mud, and the coaxial cable detector is used for measuring the water content of The coaxial cable detector can quickly and nondestructively measure the moisture content change of the sludge at different heights in the self-weight deposition process, and can be used for quickly and quantitatively analyzing the humidity distribution condition of the sludge in the self-weight deposition process in engineering. A shell is arranged on the outer side of a settlement column, probe sets are installed on the periphery, the upper portion and the lower portion of the settlement column at intervals, it is ensured that a waveguide rod is exactly in contact with the settlement column, and the electromagnetic waves received by coaxial cable detectors of different heights are transmitted to soil in the settlement column according to the difference of time needed by the soil in the settlement column. A relation curve between the feedback time of the electromagnetic waves and the water content is obtained, and the water content of slurry at different heights can be rapidly calibrated.

The application discloses a cascaded super surface electromagnetic transmission modeling and analysis method based on a wave matrix and a cascaded super surface, belongs to the technical field of high-frequency communication and artificial electromagnetic super surface, and takes the wave matrix theory as the core. The cascaded structure contains a dielectric partition and n sheet admittance layers, the total electric field is the sum of the forward and backward propagation fields, the magnetic field expression is obtained by combining a 90-degree rotation matrix, an equivalent four-port network is obtained, the wave matrix is associated with the scattering and transmission matrix, the total wave matrix is obtained by combining the wave matrix of each layer, the isolation medium is introduced for correction, and the modeling is completed by solving the parameters. The cascaded super surface electromagnetic transmission modeling and analysis method based on the wave matrix and the cascaded super surface can form a building surface signal enhancement system framework, improve the electromagnetic wave transmission efficiency through the glass curtain wall, reduce the deployment and maintenance cost, endow the super surface with mechanical adaptability, enhance the compatibility with the glass curtain wall, and support large-scale deployment in complex scenes.

The invention mainly relates to the technical field of geological drilling, and provides a small-diameter near-bit measurement-while-drilling device in order to improve the efficiency and accuracy of obtaining small-diameter drilling engineering parameters, inner pipe track parameters and stratum information, and the core of the small-diameter near-bit measurement-while-drilling device is that all functional units are tightly integrated in a small-diameter outer protective shell inner pipe assembly; the overall size of the device is reduced; stratigraphic magnetic field interference is considered, and a multi-sensor data fusion algorithm is adopted to carry out fusion processing on engineering parameters, inner pipe track parameters and stratigraphic information; an automatic switching mechanism is designed, slurry pulse transmission and electromagnetic wave transmission are switched according to underground working conditions, continuity and accuracy of data transmission are ensured, high-precision measurement while drilling of engineering parameters, inner pipe track parameters and stratum information is realized, and meanwhile, on the premise that a small-diameter underground key machine tool is designed in a small size, the measurement precision is greatly improved. Coordination and unification of strength, power, a measurement-while-drilling channel and a power transmission channel are achieved, and adaptability and reliability of the device in a complex underground environment are improved.