17results about How to "Small signal attenuation" patented technology

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 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 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.

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.

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.

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 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.

This invention discloses a high-strength, high-conductivity copper-silver alloy for communication connectors and its preparation method, belonging to the technical field of copper alloy materials. The process includes: S1 melting and casting, the alloy containing Ag and one or more of the amplitude modulation decomposition inducing elements Ni, Co, Al, Ti, and Fe; S2 homogenization treatment; S3 cooling at 10-50℃ / h to 350-550℃ and holding for 2-24h to induce amplitude modulation decomposition and form a nanoscale periodic amplitude modulation structure; S4 cold deformation processing; S5 multi-stage gradient aging: holding at 200-350℃ for 1-5h, heating at 5-20℃ / h to 400-500℃ and holding for 2-8h, cooling at ≤10℃ / h to 300-350℃ and holding for 4-12h to form a periodically arrayed coherent nano-precipitated phase; S6 preparing an inner self-lubricating plating layer and an outer protective coating. This invention guides the orderly growth of precipitates using an amplitude-modulated template, resulting in an alloy with tensile strength ≥470MPa, conductivity ≥89%IACS, elongation ≥6%, and excellent high-temperature stability, making it suitable for connectors used in extreme environments such as 5G communication and deep space exploration.

A low-capacitance environment-friendly intelligent track traffic signal special flexible cable is characterized by comprising two signal lines, a filling body, a belting layer and a sheath layer, the cable core assembly comprises two groups of signal wire pairs, one group is a working wire pair, the other group is a standby wire pair, functions of lightning protection and stray capacitance elimination and a comprehensive waterproof function are taken into consideration, so that the cable has low capacitance and excellent wear resistance, is applied to occasions such as new construction or quality improvement and reconstruction of urban rails or subway lines, greatly reduces the construction cost of railway signals, and has good application prospects. The cable is simple in structure, considerable in economic value and application value, low in capacitance, excellent in cable water resistance, interference resistance and wear resistance and small in signal attenuation, the safety and reliability of line operation are greatly improved, the railway signal construction cost can be effectively reduced, and the cable has popularization and application value.