55results about How to "Small signal attenuation" patented technology

The embodiment of the invention discloses an ultrasonic harmonic image generation method and device, electronic equipment and a medium. A specific embodiment of the method comprises the following steps: controlling an ultrasonic transmitting probe to transmit a low-frequency ultra-harmonic signal; controlling an ultrasonic receiving probe to receive the echo signal set to be detected; carrying out compressed sampling processing on the echo signal set to be detected and then carrying out signal reconstruction to obtain a reconstructed echo signal set; carrying out delay superposition processing on the reconstructed echo signal set to obtain a superposed echo signal; performing signal filtering decomposition processing on the superposed echo signals to obtain a super-harmonic signal set; performing envelope detection on the super-harmonic signal set to obtain an echo amplitude information set; and generating a target area ultrasonic harmonic image set, and sending the target area ultrasonic harmonic image set to a target terminal for display. According to the embodiment, by transmitting the low-frequency signal and receiving the ultra-harmonic signal, the attenuation of the received signal can be reduced, the signal penetration depth can be improved, the purity of the received signal can be improved, and the quality and the resolution of the generated ultrasonic harmonic image can be improved.

The invention relates to the technical field of laser communication, in particular to a free space optical communication system, device and method. According to the free space optical communication system provided by the invention, the space light beam is firstly coupled with the multimode optical fiber, and the characteristic that the diameter of a fiber core of the multimode optical fiber is larger is utilized, so that the coupling efficiency is improved, and the energy loss in the coupling process can be effectively reduced. Then, a mode demultiplexer is used, and a mode conversion technology is adopted to separate and convert multiple modes of light in the multimode optical fiber, so that the obtained LP01 mode is separated and converted into a fundamental mode of the single-mode optical fiber to serve as an output optical signal, and the problem that the modes of the multimode optical fiber and the single-mode optical fiber are not matched is solved through the mode conversion technology; and finally, the converted fundamental mode signal in the single-mode fiber is used for communication, so that a high-speed communication module can be better matched.

The utility model discloses a double-shielding high transmission data cable, including: insulating core wire, buffer hose, aluminum plastic composite tape, ground wire, metal braid layer and sheath, insulating core wire is formed by three insulating layer co-extrusion on the conductor, every two insulating core wire pair twist to form one group of twisted pair wire, each group of twisted pair wire is lapped with aluminum plastic composite tape, the metal braid layer is lapped with the buffer hose, the metal braid layer is lapped with the metal braid layer, the metal braid layer is lapped with the metal braid layer, and the metal braid layer is lapped with the metal braid layer. The four groups of twisted pair wires are twisted into a cable by taking the ground wire as a center, a metal braided layer is braided on the four groups of twisted pair wires which form the cable, an aluminum foil layer on an aluminum-plastic composite belt is in contact with the metal braided layer and the ground wire, a buffer hose is spirally wound on the metal braided layer at equal intervals, and the buffer hose is formed by mixing and extruding a PVC material and aluminum hydroxide particles. And a sheath is extruded on the metal braid layer, is filled in the gap of the buffer hose and is attached to the metal braid layer. The advantages of the utility model are that the cable can maintain the high-speed and high-reliability transmission performance of data signals in a conventional environment and an environment in which a fire disaster occurs or a building collapses.

The utility model relates to the field of environment detection, in particular to coal field geological environment detection equipment. The coal field geological environment detection equipment comprises a supporting plate; a detection equipment body is arranged above the supporting plate; wherein a lifting assembly capable of moving up and down is arranged at the top of the supporting plate, and the detection equipment body can be driven to move through the lifting assembly; a buffer assembly is arranged above the supporting plate, and interference of external vibration on the detection equipment body can be reduced through the buffer assembly. According to the coal field geological environment detection equipment provided by the utility model, the vibration of the equipment can be reduced through the arrangement of the buffer assembly, the coal field geological environment is often complex and changeable, including but not limited to uneven ground, frequent vibration and the like, and the vibration of the equipment can be reduced through the additional arrangement of the buffer assembly. The influence of unstable factors caused by external vibration or equipment motion on a detection result can be effectively reduced, and the working stability of the equipment in a complex terrain is improved.

The application discloses a downhole multi-parameter logging device and belongs to the technical field of logging while drilling, comprising a drill collar, a battery module and a circuit module are respectively arranged at the two ends of the inner cavity of the drill collar and are axially fixed through locking modules, a metal centralizer is fixedly arranged in the inner cavity of the drill collar, a plurality of independent centralizing blocks are arranged at the center of the metal centralizer, the drill collar comprises a drill collar body, an antenna housing, a strip-shaped magnetic core and a coil, and stable signal transmission is guaranteed, the battery module comprises annular batteries and butterfly springs, can be replaced on site and has a damping function, the circuit module comprises resistivity, azimuth gamma and inclination measurement modules, is integrally designed and has strong anti-interference performance, the metal centralizer realizes self-adaptive centralizing through centrifugal force and hydraulic damping, and the independent centralizing blocks can compensate temperature errors, the device is stable in structure, is suitable for complex well conditions, is convenient to maintain and can realize accurate and synchronous measurement of multiple parameters, thereby providing reliable data support for logging while drilling.

The invention relates to a high-speed signal transmission device and method, and belongs to the technical field of signal transmission, the device comprises a fixing support, a high-speed cable and an adjustable fixing device, the fixing support is provided with a limiting hole of a cable connector with a preset size, one end of the high-speed cable is connected with the cable connector, the other end of the high-speed cable is connected with a board card connector, and the board card connector is connected with the fixing device. The board card connector is connected with a board card, the fixing device is arranged in the fixing support and corresponds to the test board in size, and the fixing device fixes the test board. The device improves the signal transmission efficiency, stability and flexibility.

The utility model discloses a protective Bluetooth on-machine measuring head, and particularly relates to the field of on-machine measuring heads, which comprises a machine head, a transparent shell positioned below the machine head, a probe seat positioned at the bottom of the transparent shell and a measuring head rod piece mounted at the bottom end of the probe seat, a base extending into the transparent shell is installed at the bottom end of the machine head, a Bluetooth module is installed on the outer wall of the base, the machine head, the transparent shell and the probe base are sleeved with a protection piece capable of moving in a lifting mode, and an upper limiting piece for adsorbing the top end of the protection piece is installed at the edge of the top end of the machine head. And a lower limiting piece for adsorbing the bottom end of the protection piece is arranged on the outer side of the probe seat. According to the utility model, the telescopic tube and the rubber magnetic ring form a flexible barrier to absorb the impact force of chippings and prevent the transparent shell from being scratched or broken, the transparent shell is made of a low-dielectric-constant material, the signal attenuation is small, the transmission efficiency of the Bluetooth module is ensured, and the rubber magnetic ring and the plastic telescopic tube avoid the metal shielding effect and maintain the signal integrity.

The utility model relates to the technical field of medical treatment, in particular to a medical endoscope wireless isolation protection device which comprises a transmitting end and a receiving end. The transmitting end comprises an image sensor module, a high-speed serializer and a millimeter wave wireless transmitting module which are connected in sequence; the receiving end comprises a millimeter wave wireless receiving module, a high-speed deserializer, an image processing unit and a display storage module which are connected in sequence; a traditional copper cable is replaced by millimeter wave wireless transmission, high-speed data transmission is achieved, a physical electrical isolation barrier is established, a ground loop and electromagnetic interference of traditional wired transmission are eliminated, meanwhile, a high-speed serial interface is adopted, the number of data lines is reduced during transmission, and signal attenuation is reduced.

The present invention proposes a synchronous acquisition circuit, system and method, wherein the acquisition master station generates a synchronous reference clock signal, and transmits the synchronous reference clock signal to the acquisition slave stations connected in sequence; the acquisition station samples data from the sensor connected to it according to the synchronous reference clock signal and acquisition parameters to obtain a corresponding sampling signal, and transmits the sampling signal to an external device; wherein the acquisition parameters include the frequency of the synchronous reference clock signal and the ratio relationship between the target sampling frequency of the synchronous acquisition circuit and the frequency of the synchronous reference clock signal. The acquisition stations in the synchronous acquisition circuit are distributed in series, and the number of acquisition stations is no longer limited by the number of channels of the synchronous signal output. The synchronous acquisition is controlled by the synchronous reference clock signal transmitted one by one, and the line length between adjacent acquisition stations can be controlled to avoid the line being too long, thereby reducing signal attenuation and improving anti-interference ability.

The invention relates to the technical field of underwater target detection, and discloses a data acquisition method applied to underwater target side-scan sonar image detection, and the method comprises the steps: recognizing a detection region of an underwater target, and setting a sound wave transmission path of side-scan sonar equipment; identifying an echo signal of the underwater target, extracting signal intensity and delay parameters of the echo signal, and constructing an underwater two-dimensional image of the underwater target; performing quality optimization processing on the underwater two-dimensional image to obtain an optimized image, identifying signal receiving time and receiving position coordinates of the echo signal, and generating image paraphrases of the underwater target; identifying a non-target object of the side-scan sonar device, extracting key features of the non-target object, and setting a beam obstacle avoidance path of the side-scan sonar device; and setting a re-tracking mechanism of the underwater target, and performing data acquisition on the underwater target based on the re-tracking mechanism and the beam obstacle avoidance path to obtain a data acquisition result. According to the invention, the accuracy of underwater target data acquisition can be improved.

The invention discloses a combiner box communication system based on HPLC (High Performance Liquid Chromatography) high-speed power line carrier communication. The combiner box communication system comprises a signal isolation processing module, a filter circuit, a power amplification circuit, an HPLC chip and a microprocessor, when a box transformer substation system needs parameters in each combiner box system, a query instruction is sent out according to an agreed communication protocol format, and data is sent out through a magnetic ring and a power line; after the combiner box communication system of the corresponding address receives the instruction of inquiring the voltage value, data signal processing and filtering processing are carried out in the combiner box communication system, instruction information is transmitted to the microprocessor through the HPLC chip, and the microprocessor analyzes the received instruction and sends out a parameter value appointed to be inquired through the HPLC chip; and the magnetic ring on the power line of the box transformer substation system receives the data signal and analyzes the data signal through the internal HPLC module. The system is suitable for occasions such as a photovoltaic power station and a wind power plant where a plurality of distributed energy devices need to be remotely monitored, the operation and maintenance efficiency can be effectively improved, and the operation and maintenance cost is reduced.

The invention belongs to the technical field of integrated circuits, and provides a single-ended MEMS input-to-differential output circuit and an implementation method thereof. Through the CMFB circuit, effective signals of the CMEMS are averagely distributed to the VBIAS end and the VIN end, the maximum signal range which can be processed by the Pre-amplifier is doubled, meanwhile, a single-end-to-differential circuit is omitted, power consumption and noise are reduced, and circuit performance is improved. Compared with the prior art, according to the technical scheme, an impedance matching circuit or a capacitance compensation circuit is omitted, so that signal attenuation caused by parasitism is reduced, and performance is improved. Particularly, the stray capacitance of the VBIAS end can be ignored. The problem of performance deterioration under the condition that the stray capacitance of the VBIAS end is too large in the prior art is solved.

The invention discloses a multi-channel integrated wireless intelligent irrigation electrically operated valve capable of being independently adjusted, and relates to the technical field of electrically operated valves. Through cooperation of the wireless communication module, the control module and the driving motor, remote intelligent control over the irrigation valve is facilitated, and the intelligent degree and convenience of irrigation control are improved; free space loss and shielding loss are calculated in a layered mode through an analysis unit, communication risks of different areas are accurately judged by combining comparison of theoretical receiving strength and electric valve receiving sensitivity, influences of shielding on signals are quantified, it is ensured that the transmission loss of the selected installation area is minimum, instruction loss or delay caused by shielding is reduced from the source, and the communication efficiency is improved. The reliability of remote control is improved; the deviation angle is calculated and analyzed through the analysis unit, angle deviation caused by wind, rain and collision is responded in real time, the deviation degree is accurately quantified through the length difference of the spring, it is ensured that the signal rod is always located at the optimal receiving angle, and signal attenuation caused by angle deviation is reduced.

This invention relates to the field of connector technology and discloses a self-coupling connector, including a main connector. A lower housing is fixedly disposed on one side of the main connector, and an upper housing is disposed at the upper end of the lower housing. Four sets of first bolts are threadedly connected to the upper and lower housings around their perimeters. A mating pin is fixedly disposed inside the main connector. A positioning component is disposed inside the lower and upper housings, and a shielding component is disposed inside the lower and upper housings near the positioning component. The positioning component includes a mating cavity formed in the lower and upper housings, and a sleeve is fixedly disposed on one inner wall of the mating cavity. The self-coupling connector of this invention, through overall cooperation, allows the locking block to automatically engage inside the slot and shield the mating pin end face in the sleeve, preventing contamination when not mated.

The invention relates to a Compton scattering signal detection system based on a wavelength shift optical fiber, which comprises a packaging shell, a scintillator detector, a signal transmission module and a signal collection module, and is characterized in that the packaging shell comprises a black polycarbonate plate and a black sleeve; the scintillator detector comprises a plastic scintillator, optical glass, a mirror surface aluminum foil and a Teflon coating layer; the signal transmission module comprises a wavelength shift optical fiber, a titanium dioxide reflecting layer, an optical fiber shading sleeve, a light guide and a black rubber sleeve; the signal collection module comprises a photomultiplier and a signal collection card. Compared with the prior art, the Compton scattering signal detection efficiency and precision are improved, signal attenuation and loss are avoided, the system structure is simplified, and the manufacturing and maintenance cost is reduced.

This invention discloses an integrated sensing, driving, and control system and method for micro-nano robots based on an optical communication protocol. The system includes a control module and connected optical communication, multimodal sensing, driving, and power management modules. The optical communication module uses a preset protocol to achieve bidirectional conversion between optical and electrical signals. The downlink uses PWM encoding and near-infrared light, while the uplink uses Manchester encoding and blue light. The multimodal sensing module integrates multiple sensors, and the sampling parameters are dynamically configured by the control module. The driving module converts control commands into PWM signals to precisely drive micro-actuators. The power management module switches between working and sleep modes according to commands. The control module is responsible for command decoding and system scheduling. This system achieves efficient collaboration of communication, sensing, driving, and control on a single chip, featuring high integration, reliable communication, low latency, and low power consumption. It provides a core technology solution for the application of micro-nano robots in complex environments such as biomedicine and environmental monitoring.

The invention relates to the technical field of audio and video acquisition, in particular to a multichannel audio and video synchronous acquisition board, which comprises a multichannel audio access unit, a photoelectric conversion module, an FPGA (Field Programmable Gate Array), a processor and a power supply module, the output end of the multi-channel audio access unit and the output end of the photoelectric conversion module are both connected with the input end of the FPGA, the output end of the FPGA is connected with the processor, and the power module is used for supplying power to the multi-channel audio access unit, the photoelectric conversion module, the FPGA and the processor. And the requirement of multi-channel synchronous acquisition of different digital video signals and audio signals is met.

A signal transmission cable relates to the technical field of wires and cables and comprises a cable core, the cable core comprises a pair of signal lines and a pair of power lines, each signal line comprises a first conductor on the inner layer and a first high-density PE insulating layer on the outer layer, the first conductor is formed by stranding sixteen tin-plated oxygen-free copper wires with the diameter of 0.20 mm, and the second conductor is formed by stranding sixteen tin-plated oxygen-free copper wires with the diameter of 0.20 mm. An aluminum-plastic composite tape sub-shielding layer is wound on the periphery of the pair of signal lines; the power line comprises a second conductor on the inner layer and a second high-density PE insulating layer on the outer layer. The second conductor is formed by bunch stranding of seventy-seven tin-plated oxygen-free copper wires with the diameter of 0.20 mm. A PE polyester tape inner isolating layer is wound outside the cable core, a tinned copper wire total shielding layer is woven outside the PE polyester tape inner isolating layer, a PE polyester tape outer isolating layer is wound outside the tinned copper wire total shielding layer, and a 105 DEG C high-flame-retardant polyvinyl chloride protective layer is extruded outside the PE polyester tape outer isolating layer. The cable is small in signal attenuation, strong in anti-interference performance, stable in signal transmission, and good in flame retardation effect.

The invention discloses optical fiber ultrasonic detection equipment, which comprises an optical signal generation assembly, a transmitting optical fiber and a plurality of opto-acoustic transduction transmitters which are connected in sequence, and an echo detection assembly, a transmitting optical fiber and a plurality of opto-acoustic transduction receivers which are connected in sequence, a front end substrate; the transmitting port of each photoacoustic transduction transmitter and the receiving port of each photoacoustic transduction receiver are jointly distributed on the same surface of the front-end substrate; the optical signal generation assembly comprises a laser generation device used for generating excitation optical signals and a phased array unit. The phased array unit is used for controlling the laser generating device to transmit excitation light signals to all the photoacoustic transduction emitters according to a set rule. The plurality of photoacoustic transduction emitters and the plurality of photoacoustic transduction receivers are arranged on the front-end substrate, so that the front-end substrate can be attached to the surface of the human tissue, and non-invasive detection of the human tissue is realized; the precision and reliability of an ultrasonic detection structure are improved, the operation difficulty of ultrasonic detection is reduced, and wide application of ultrasonic detection is facilitated.

This utility model discloses a piezoelectric film vibration detection sensor, belonging to the field of vibration detection technology. It includes a PVDF piezoelectric film sensing unit, which comprises a PVDF piezoelectric film substrate. An upper silver electrode layer and a lower silver electrode layer are respectively disposed on the upper and lower sides of the PVDF piezoelectric film substrate. A flexible substrate is adhesively bonded to the bottom of the lower silver electrode layer, and a signal conditioning module is disposed on one side of the bottom of the flexible substrate. The upper and lower surfaces of the PVDF piezoelectric film substrate are tightly bonded to the upper and lower silver electrode layers, respectively, achieving ohmic contact between the electrodes and the piezoelectric film. The upper and lower silver electrode layers collect the charge signals generated by the PVDF piezoelectric film substrate, resulting in high detection sensitivity. The electrical signals are then transmitted to the signal conditioning module, which amplifies weak charge signals, filters noise, performs analog-to-digital conversion, and analyzes the vibration amplitude and frequency characteristics in real time, completing the electromechanical conversion of the vibration signal. This facilitates the capture of minute and ultra-low frequency vibration signals, with fast response and low signal attenuation.

The present application relates to the field of microwave photonics, and more particularly to a high linearity microwave photonics down-conversion receiving system based on an optoelectronic oscillator. The system comprises a laser, a first phase modulator, a first optical amplifier, a phase-shifted Bragg grating, a first photodetector, a second phase modulator, an optical filter, a second optical amplifier, and a second photodetector. The frequency of the local oscillator signal generated by the first photodetector can be tuned by changing the frequency of the laser, thereby effectively realizing the tuning of the down-converted signal output by the second photodetector. By adjusting the gain value of the first optical amplifier, the amplitude of the local oscillator spectral harmonic in the output optical signal of the first phase modulator is a specific value, thereby realizing the suppression of the third-order intermodulation distortion in the output signal, and further improving the spurious-free dynamic range of the entire down-conversion receiving system. The system has reconfigurability and high linearity, and can play a technical value in the field of radar and communication applications.

The invention discloses a mine flameproof wireless antenna introduction device and an installation method thereof. The device comprises a flameproof sleeve and a sealing and pressing member. A radio frequency cable passes through the sealing and pressing member, a flameproof shell and a flameproof sleeve. The flameproof sleeve comprises a flameproof outer sleeve and a flameproof inner sleeve. The flameproof inner sleeve and the flameproof outer sleeve are connected by flameproof threads. The sealing and pressing member comprises a pressure plate, a sealing cylinder and a sealing pad. The pressure plate, the sealing cylinder and the sealing pad are all extended into the flameproof shell. The radio frequency cable passes through the pressure plate, the sealing cylinder, the sealing pad, the flameproof shell and the flameproof inner sleeve in sequence. Epoxy resin is filled between the radio frequency cable and the flameproof inner sleeve. The method comprises the following steps: 1. Testing of the flameproof outer sleeve and the flameproof inner sleeve; 2. Testing of the sealing and pressing member; 3. Testing of the flameproof shell; 4. Installation of the flameproof sleeve, the sealing and pressing member and the radio frequency cable; 5. Testing of the wireless antenna introduction device. The invention ensures that wireless operation is safe and reliable and can be adapted to mine flameproof equipment.

The utility model discloses a vacuum sealing wire connector, which comprises a sealing cavity, a connecting bottom plate, a connecting flange and an outer end cover, one side of the sealing cavity is connected with the outer end cover, the other side of the sealing cavity is connected with the connecting flange, and the connecting bottom plate is arranged on the sealing cavity. According to the utility model, the vacuum end electrical transmission signal line is compacted on the double-end connecting piece, an electrical signal is transmitted to the normal pressure end through the copper alloy double-end connecting piece with good electric conduction and heat conduction performance, and the double-end connecting piece is fixed through the sintered glass, so that the vacuum sealing performance is good, and the insulating strength is high; a vacuum cavity and a normal-pressure cavity can be effectively isolated, so that a working scene in which electric signals are unobstructed and gas is effectively isolated is formed, and signal transmission in a vacuum isolation state is realized. The normal-pressure end can lead out electric signals in various modes and is connected to processing and executing elements such as a PLC, a servo controller and a frequency converter through cables, and the device has the advantages of being high in connection strength and small in signal attenuation.

This invention relates to the field of oil and gas field fracturing technology, and particularly to an integrated device and method for horizontal well cluster-level fluid extraction, production measurement, and fracturing. The technical solution is as follows: a multi-nozzle pressure-controlled switch jet pump and a first packer are connected to the casing downhole via tubing. Within the horizontal section, a production measurement and fracturing control valve and a water hammer wave monitor are connected via tubing. The production measurement and fracturing control valve and the water hammer wave monitor are located between the second and third packers. The advantages are: by coordinating the multi-nozzle pressure-controlled switch jet pump with the production measurement pump core of the storage-type downhole jet pump, fluid extraction and formation production data can be measured in cluster-level sections of the horizontal well. Furthermore, by moving the positions of the production measurement and fracturing control valve and the water hammer wave monitor, fracturing operations can be performed on the corresponding cluster sections requiring modification. Simultaneously, water hammer wave data can be measured at close range. A single drilling run completes the functions of fluid extraction, production measurement, and fracturing, resulting in low construction costs and high measurement accuracy.

The utility model discloses a connector with an anti-interference function, which relates to the technical field of connectors and comprises a shell, a first grounding terminal assembly, a second grounding terminal assembly, a third grounding terminal and a fourth grounding terminal. The first grounding terminal assembly comprises a first forming piece, a first grounding piece, a first grounding terminal, conductive adhesive and a shielding piece. The first forming piece, the first grounding piece and the first grounding terminal of the first grounding terminal assembly are connected in a forming mode. The first grounding piece is provided with a first short-circuit point which is tightly connected with the middle part of the first grounding terminal; the shielding sheet is provided with a second short circuit point which is tightly connected with the lower end of the first grounding terminal; the conductive adhesive and the shielding sheet are molded and fixed, so that the shielding effect of equipment is enhanced, electromagnetic interference is effectively prevented, and signal interference can be effectively prevented; and through short circuit, mutual interference is reduced, the anti-interference performance is improved, and the stability is ensured.

The full-localization video decoding board comprises a processor adopting a domestic chip, an FPGA (Field Programmable Gate Array), a storage unit, an interface unit and a power supply system, the interface unit comprises a first connector and a second connector; a serial port of the processor is connected to the first connector through the serial port conversion chip; the output end of the processor is connected with the receiving end of the FPGA; the FPGA is connected to the second connector through the first conversion chip and the second conversion chip in sequence; the first conversion chip is used for converting an RGB signal output by the FPGA into a VGA single-ended signal and accessing the VGA single-ended signal to the second conversion chip; the second conversion chip is used for converting the VGA single-ended signal into an XGA signal and outputting the XGA signal to the second connector; the FPGA is further connected to the second connector through a third conversion chip, and the third conversion chip is used for converting RGB signals output by the FPGA into VGA single-end signals and outputting the VGA single-end signals to the second connector. The utility model has the advantages of simple circuit structure, low cost, strong compatibility, high transmission stability and the like.

The invention discloses a 220KV current transformer bushing end screen signal pickup device. The existing device has the problems of inconvenient installation, large signal attenuation and low detection efficiency. The invention comprises a high-frequency signal acquisition component and a low-frequency signal acquisition component which are threadedly connected. The high-frequency signal acquisition component comprises a high-frequency component housing, a horizontal baffle, a copper rod fixing block, a copper rod, and a high-frequency partial discharge sensor. The horizontal baffle and the copper rod fixing block isolate the copper rod from the high-frequency component housing. The low-frequency signal acquisition component comprises a low-frequency component housing, a cotter pin, a metal hose lead-out tube, a sensor mounting inner tube, a sensor mounting outer tube, and a low-frequency dielectric loss sensor. After the metal hose together with the high-frequency signal line and the low-frequency signal line are led out of the pickup device through the metal hose lead-out tube, a resin material is injected to seal the metal hose lead-out tube. The invention adopts an integrated sealing structure, has good shielding performance and anti-interference performance, is safe and reliable to use, and can effectively adapt to the on-site environment.

The invention discloses a cased well ground signal two-way wireless electromagnetic transmission device and method, and belongs to the technical field of oil and gas field development logging, the cased well ground signal two-way wireless electromagnetic transmission device comprises an underground terminal system, a metal loop transmission channel and a ground terminal system, the metal loop transmission channel is a closed metal loop constructed with an oil pipe and a casing as carriers, and the metal loop transmission channel is a closed metal loop. The underground terminal system is sequentially and electrically connected with a first centralizer, an ascending transmission short section, a packer, a descending transmission short section, a sensor integration short section and a second centralizer from top to bottom along the axis of a casing pipe, and the first centralizer and the second centralizer are made of conductive rubber materials. The oil pipe and the sleeve are electrically conducted to construct the closed metal loop, the oil pipe and the sleeve serve as carriers to construct a closed metal loop transmission channel, transmission media do not need to be additionally laid, the metal loop provides a low-loss transmission path for TM waves, signal attenuation is effectively reduced, and the transmission efficiency is improved. The problem of serious signal attenuation in a deep well in traditional wireless electromagnetic transmission is solved.

The utility model discloses a transmission line, include: first transmission section, including at least one first stator, second transmission section, along the motion direction of first transmission section and first transmission section interval setting, and including at least one second stator, third transmission section, along first direction and first transmission section interval setting, and including at least one third stator, first horizontal connection mechanism, including first horizontal connection drive assembly and first horizontal connection stator, first horizontal connection drive assembly is used for driving first horizontal connection stator and transmission direction end first stator and transmission direction head second stator connection, or with third stator connection, first up and down connection mechanism, including first up and down connection drive assembly and first up and down connection stator, and optical fiber line, will first stator, first horizontal connection stator, first up and down connection stator and third stator in proper order series connection, and this application can guarantee the accurate control and stable operation of the runner in the transmission process.

The present invention relates to the field of radio frequency cable technology, and in particular to an ultra-flexible, lightweight, high-power radio frequency cable for medical use and a production method thereof, comprising: the radio frequency cable is composed of a cable core, an inner protective layer, a shielding layer, and an outer protective layer from inside to outside; the cable core comprises a plurality of twisted conductors; the plurality of twisted conductors are connected by twisting; the inner protective layer is coated on the outer periphery of the cable core to isolate the current and reduce the torsional force of the cable core; the shielding layer is used to eliminate signal mutual interference, and comprises a first shielding layer and a second shielding layer, the first shielding layer is coated on the outer periphery of the inner protective layer, and the second shielding layer is coated on the outer periphery of the first shielding layer; the outer protective layer is coated on the outer periphery of the second shielding layer to protect the internal overall structure; the outer protective layer is made of a flexible material. The present invention can improve the bending performance and power transmission performance, and can reduce the weight of the radio frequency cable.