25results about How to "Avoid signal loss" patented technology

The invention relates to the technical field of multi-core optical fiber connection, and provides a multi-core optical fiber high-efficiency plugging type micro-connection structure system and a connection method thereof.The system comprises a multi-core optical fiber connector body, an optical fiber plugging terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used for being connected with an optical fiber core of a multi-core optical fiber; the optical fiber plugging and unplugging terminal is used for realizing plugging and unplugging operation of the multi-core optical fiber connector body and the butt joint seat and simultaneously realizing mechanical alignment of the multi-core optical fiber connector body and the butt joint seat; the optical fiber alignment auxiliary terminal is used for assisting the multi-core optical fiber to realize micron-order alignment in the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used for correcting optical fiber connection offset caused by temperature change, stress and manufacturing errors in real time and maintaining the stability of the system. The method has the effect of improving the connection quality of the multi-core optical fiber.

The invention discloses a multi-component gas laser synchronous detection system and method, and belongs to the technical field of laser spectrum gas detection. According to the invention, the corresponding absorption peak position is obtained through the concentrations of CH4, H2S, O2 and CO standard gases in the multi-component sealed gas pool, and the laser driving module is regulated in real time to lock the central wavelength output by the corresponding laser module; a laser driving module synchronously outputs CH4 and H2S analog voltage signals in the same direction and O2 and CO analog voltage signals in the reverse direction to drive a corresponding CH4 laser, a H2S laser, an O2 laser and a CO laser, paired analog voltage signals in opposite directions can be synchronously output, and modulation amplitudes of current modulation signals of the four lasers are mutually counteracted when gas to be detected is detected. And meanwhile, absorption signal positions of the four gases can be arranged at strong light intensity positions, so that the amplitude values and the signal-to-noise ratios of the absorption signals of the four gases are remarkably improved, and the synchronous absorption detection precision of the four gases is greatly improved.

The invention relates to the technical field of unmanned aerial vehicle detection countering, and discloses a mooring type unmanned aerial vehicle detection countering system based on power line carrier control, and the countering system is composed of a radio interference module, a drive-by-wire unmanned aerial vehicle control module, a four-direction mooring positioning module, a system integration control module and a performance optimization module. The radio interference module is composed of a high-power radio transmitter, a frequency selector, a signal analyzer and an interference mode switcher, interference signals are accurately controlled and adjusted through the multi-component design, it is ensured that all key links including control, navigation and video transmission links are covered, the interference mode switcher is switched among different interference modes, and the interference mode switcher is switched among different interference modes. The unmanned aerial vehicle is controlled in a wired mode, the influence of radio interference on the unmanned aerial vehicle is avoided, the stability and reliability of the unmanned aerial vehicle in a radio interference environment are ensured by the wired control mode, and the beneficial effects of effectively sending countering signals to the ground, minimizing a shielding blind area and maximizing countering efficiency are achieved.

This application discloses a distributed fiber optic vibration sensor wiring method and wiring device for bridge structures. The method includes the following steps: determining the key monitoring areas of the bridge; deploying a wiring device in the key monitoring areas; sequentially passing single-mode optical fibers through the fiber inlet and outlet ports to obtain an optical fiber sensing network; winding the single-mode optical fibers according to a set method to form redundant fiber segments; using cyanoacrylate adhesive to couple and fix the straight segments of the main optical fibers along the centerline of the bridge structure to the bridge surface; dynamically adjusting the number of winding turns of the redundant fiber segments by controlling the servo motor in the wiring device according to the real-time vibration frequency and amplitude of the bridge; by deploying a wiring device with redundant optical fibers in the key monitoring areas, the density of local optical fiber sampling points is increased by utilizing the redundant segments to meet the bridge monitoring requirements; and the winding speed is dynamically adjusted by the servo motor to ensure that the optical fibers maintain constant tension during storage and deployment, thus avoiding damage to the optical fibers.

This application provides an orthogonal system architecture and a network device. The orthogonal system architecture includes a first circuit board, a second circuit board, a first connector, and a second connector. The first circuit board and the second circuit board are disposed vertically to each other. The first connector is electrically connected to the first circuit board via a first cable assembly, the second connector is disposed on the second circuit board and is electrically connected to the second circuit board, and the first connector is plug-connected to the second connector, to electrically connect the first circuit board to the second circuit board. When the foregoing structure is used, the first circuit board is electrically connected to the first connector via the first cable assembly. Compared with transmitting a signal through a transmission line on a board, a cable has good high-speed performance and a low signal loss. This improves system high-speed performance. In addition, a signal is transmitted through the cable, so that cross transmission lines in the first circuit board can be avoided. In this way, restrictions on a quantity of layers and a board material of the first circuit board are relaxed, and design and manufacturing difficulties of the circuit board are reduced.

The utility model discloses a set top box with an extensible function, and relates to the technical field of set top boxes. The set top box comprises a mounting frame, the side face of the mounting frame is fixedly connected with a set top box body, the side face of the mounting frame is provided with an external port, the side face of the mounting frame is provided with an automatic pushing device, the automatic pushing device comprises a U-shaped track frame, the side face of the U-shaped track frame is fixedly connected to the side face of the mounting frame, and the side face of the U-shaped track frame is provided with an external port. A rail groove is formed in the side face of the U-shaped rail frame, and a containing block is fixedly connected to the side face of the U-shaped rail frame. According to the utility model, the driving force of the motor I is matched with a fixed block, a reciprocating screw sleeve, a reciprocating screw rod and other components in the automatic pushing device, so that the movement of the function extension module is realized, and a socket on the side surface of the function extension module moves towards an external port, and therefore, the function extension module is butted with the mounting frame; and the effects of reducing the burden of the user and saving time and energy are achieved.

The invention discloses a circuit and a method for improving interference of local oscillator phase discrimination stray on a receiver. The circuit comprises a clock input, a local oscillator unit, a filtering and amplifying unit and a frequency conversion unit which are connected in sequence. The filtering and amplifying unit is formed by connecting a pre-amplifier, an adjustable filtering unit and a post-amplifier in series; the adjustable filtering unit comprises a passband filtering and trap wave network to realize secondary suppression. The circuit can dynamically switch paths according to spurious offset, so that phase discrimination spurious is remarkably suppressed at a specific frequency point, local oscillator signals in a wide frequency range are compatible, low insertion loss and power fluctuation are kept, and the contradiction between bandwidth and performance is effectively balanced. The receiver local oscillator is realized by adopting conventional components and switch structures, does not need a special process, is easy to be integrated into an existing receiver local oscillator circuit, and has good compatibility.

The invention relates to a tilt-assisted double-sided display structure. The tilt-assisted double-sided display structure includes an optical waveguide substrate, a coupling-in grating, a coupling-out grating, and an expansion grating. The optical waveguide substrate has a first surface and a second surface, and the first surface and the second surface face each other. The coupling-in grating is arranged on the first face. The out-coupling grating is arranged on the first surface. The expansion grating is arranged on the second face, and a part of the expansion grating is overlapped with the coupling-out grating. According to the inclined auxiliary double-sided display structure, when the optical waveguide substrate is inclined or the incident angle of the incident light irradiated to the coupled-in grating is inclined, unexpected diffraction of the coupled-out light can be avoided through the expansion grating, image pixel missing is avoided, and signals are prevented from being leaked to a free space.

The invention discloses a control method of a kitchen range, the kitchen range comprises a battery, an ignition switch knob, an ignition pulse module, a main control chip, a power supply control module, a wireless module and a valve control module, after a user executes fire turning-off operation through the ignition switch knob, a connection circuit of the battery and the power supply control module is disconnected; the power supply control module supplies power to the main control chip through the stored electric energy, so that the main control chip is delayed to be powered off, and within the delayed power-off time of the main control chip, the main control chip controls closing of the gas valve and fire turning off of the stove through the valve control module, and the main control chip sends state information of the stove to other equipment through the wireless module; compared with the prior art, according to the control method of the kitchen range, under the condition that the circuit connection between the battery and the main control chip is disconnected, the power supply control module supplies power to the main control chip, so that the main control chip has time to send the state information of the kitchen range to other equipment through the wireless module, and signal disconnection between the other equipment and the kitchen range is avoided.

The invention discloses a radiology department digital gastrointestinal machine imaging control method and system, and relates to the technical field of radiology department digital gastrointestinal machine imaging control, and the method comprises the steps: carrying out the data collection based on image collection and processing; carrying out image optimization and personalized dose control; and generating a report according to the acquired image and the control result. According to the method, X-ray dose parameters are predicted and adjusted in real time based on a deep learning algorithm and data collected in real time, the radiation dose is controlled at the lowest level on the premise of ensuring that diagnosis requirements are met, noise and artifacts in images are effectively removed through the technologies of noise filtering, high-pass filtering, non-local mean denoising and the like, and the diagnosis accuracy is improved. According to the method, the definition and readability of the image are improved, the diagnosis report is automatically generated according to the collected image and the control result, the time of a doctor is saved, the diagnosis efficiency is improved, the report generation process is automated, the possibility of human errors is reduced, and the report reliability is improved.

The invention provides a quantum chip testing device and method. The quantum chip testing device comprises a wire binding plate and a testing plate detachably connected with the wire binding plate. The wire binding board comprises a first connecting structure, the test board comprises a second connecting structure matched with the first connecting structure, and when the first connecting structure and the second connecting structure are connected together, communication connection between the wire binding board and the test board is achieved. According to the quantum chip testing device, the testing plate and the wire binding plate are separated, and a quantum chip testing solution suitable for wire binding packaging from normal temperature to ultralow temperature is realized through a plug-in type or clamping type design, so that a plurality of chips can be tested at the same time in an ultralow temperature environment, the loss of the chips caused by welding is reduced, and the service life of the chips is prolonged. The test board can be flexibly inserted, pulled or clamped, convenient operation and repeated utilization of the test board are realized, the test board is compatible with different test instruments, the efficiency is improved, the cost is reduced, and the expandability is improved.

A system and method for early warning of falls into water by maintenance personnel in floating photovoltaic power plants is applicable to agricultural-photovoltaic complementary scenarios such as fishponds. Through waterproof safety equipment worn by maintenance personnel, the system achieves dual determination of the fall-in status. After triggering an early warning, a signal is transmitted via a dual-band communication module, and after validity verification by the base station, it is synchronized to the backend and rescue terminal. The system adopts a tiered response mechanism: the first-level response dispatches rescue forces within 300 meters of the fall-in point; if no confirmation is made within a short time, a second-level response is automatically triggered. The rescue terminal plans an obstacle avoidance path based on preset 3D data of the fishpond, prioritizing the avoidance of obstacles such as photovoltaic piles and deep water areas. On-site, specialized tools such as telescopic rescue poles and fluorescent waterproof lifebuoys are used to carry out targeted rescues based on the personnel's conscious state, and real-time feedback of rescue node information is provided. After the rescue is completed, vital sign checks and medical coordination are conducted, and a fully traceable summary report is generated. This invention shortens the rescue response time and improves scenario adaptability and process standardization.

The application provides a control method and system of an underwater propeller stepping motor, and belongs to the technical field of underwater robot propeller control. The method and system solve the problems of low disturbance identification accuracy, difficulty in synchronizing fine division switching and motor phase when the underwater propeller has no additional sensor. The method comprises the following steps: synchronously collecting motor bus current dynamic ripple and IMU angular velocity and acceleration signals; the current ripple is converted into a current fluctuation intensity parameter through an effective value conversion; the angular velocity is taken as a rotation intensity parameter, and the acceleration is taken as a transient translation parameter after high-pass filtering; the two parameters are fused to obtain an attitude shaking intensity parameter; the real-time ratio of the two parameters is used to dynamically allocate a fusion weight, and an effective disturbance index is calculated; the index is compared with a threshold value in a delay interval to generate a fine division switching instruction; and the motor phase current zero-crossing point is used as a trigger source to update the driving chip fine division control pin level through DMA operation, so that fine division mode switching is completed. The method and system are mainly used in the field of ocean exploration.

According to an embodiment of the present disclosure, there are provided a circuit board, an antenna structure including the circuit board, and an image display device including the antenna structure. The circuit board includes a core layer including a wiring portion and a ground portion disposed around the wiring portion, a circuit wiring extending on the wiring portion, a first ground pattern disposed around the circuit wiring and spaced apart from the circuit wiring, and a first via structure disposed in the ground portion to penetrate the core layer, the first via structure is not disposed in the wiring portion.

The invention belongs to a personalized intelligent medicine feeding regulation and control system based on machine learning, and the system comprises the steps: collecting a skin multi-source bioelectricity signal, carrying out the case matching and feature extraction through employing an ant colony-mantis shrimp visual fusion algorithm, and generating a bioelectricity feature data set; the optimization direction of the bioelectricity characteristic data set is shared through decentralized lightweight federal learning, and a medicine feeding equipment interaction model with communication and energy supply capabilities is constructed; establishing a minimum block chain network, and recording equipment operation behaviors to generate a physical hash value; decrypting the encrypted data set and extracting key features, constructing a database according to user health information, and establishing a correlation model of medication parameters and health states; and predicting an optimal medication scheme of the user through the LSTM neural network, converting the scheme into a control instruction, and issuing the control instruction to the medicine feeding equipment interaction model to form a personalized medicine feeding regulation and control closed loop. According to the invention, multiple advantages are formed in physiological data medication regulation individuation and data safety protection.

The invention relates to a motor electromagnetic characteristic separation device and method. The device comprises a soundproof box; the test tool is arranged in the soundproof box and is used for installing a motor to be tested; the sound signal processing unit is arranged outside the soundproof box and is used for acquiring noise sound pressure level data; the vibration signal processing unit is arranged outside the soundproof box and is used for acquiring a vibration signal processing result; and the data processing unit is used for carrying out electromagnetic noise characteristic separation according to the noise sound pressure level data, and / or carrying out electromagnetic vibration characteristic separation according to the vibration signal processing result. According to the invention, signal loss caused by excessive leakage of energy in the soundproof box can be avoided, sound pressure data pollution caused by external extra exciting force can be avoided, and meanwhile, after the motor is powered off, the motor can collect enough signal data; when motor electromagnetic noise specially-increased separation is carried out, alignment slicing, data processing, matrix calculation and visual result output of data before and after power failure can be automatically realized.

The invention provides a split type residual gas analyzer device, which relates to the technical field of mass spectrometry instruments, and comprises an electronic unit, a probe and a compensation and amplification unit, the electronic unit is connected with the probe through a cable; the electronic unit comprises a main control module and a radio frequency module, and the main control module is configured to adjust the frequency of the radio frequency module to realize resonance; the compensation and amplification unit comprises a feedback signal compensation module used for compensating the voltage drop loss of the radio frequency feedback signal; the compensation and amplification unit further comprises a signal primary amplification module used for amplifying signals output by the probe. Wherein a signal output by the probe is amplified by the signal primary amplification module and then is transmitted to the electronic unit through a cable. The split type residual gas analyzer provided by the invention can be effectively applied to radiation-containing fields such as synchrotron radiation light sources and nuclear industry, effectively ensures that the electronic unit is used in a non-radiation or weak-radiation environment, and prolongs the service life of the whole analyzer.

The utility model belongs to the technical field of construction management, and particularly relates to an instruction remote control lock which comprises an outer shell, a driving motor, a signal receiver and a receiving antenna, the driving motor is fixedly connected to the inner wall of one side of the outer shell, a connecting shaft is arranged on one side of the outer shell, a rotating disc is arranged on the side, away from the driving motor, of the connecting shaft, and the rotating disc is connected with the signal receiver. A connecting rod is arranged on one side of the rotating disc, a limiting rod is arranged at the end, away from the rotating disc, of the connecting rod, and the signal receiver is fixedly connected to the top of the connecting shaft; in the unlocking and locking process, the receiving antenna firstly retracts into the outer shell and then moves upwards to be reset, the purpose of scraping dust on the surface of the receiving antenna can be achieved through contact between the receiving antenna and the outer shell when the receiving antenna moves, and therefore cleaning of the surface of the receiving antenna can be completed in the unlocking and locking process; dust accumulation can be reduced, and signal loss and reception sensitivity reduction caused by excessive dust accumulation can be avoided.

This invention discloses a partial discharge interference suppression method based on pulse period consistency evaluation. First, the partial discharge signal is analyzed using a cumulative energy function to calculate the average energy. Em Then, a cumulative energy curve is constructed, and after smoothing and filtering, local minima are identified as pulse start points and local maxima as pulse end points, allowing for accurate extraction of pulse timestamps. Next, periodic consistency is evaluated based on the pulse time series: the interference period is estimated using a third-order autocorrelation function. T Then, time deviation score and energy consistency score are calculated separately to quantify the periodicity characteristics of the pulse through dual scoring. Finally, pulses with scores all above the threshold are identified as periodic interference, and the partial discharge quantity of their corresponding time period is set to zero. This invention does not require changes to the hardware connection, can adaptively distinguish and eliminate periodic interference generated by power electronic devices, improve the accuracy and reliability of partial discharge monitoring, and overcome the shortcomings of traditional manual window selection methods.

The utility model relates to the technical field of directional couplers, in particular to a directional coupling circuit and electronic equipment. According to the circuit, a signal transceiver is arranged on the top layer of a printed circuit board; the annular tubular channel is arranged in the printed circuit board, an input port of the annular tubular channel is connected with the signal transceiver, a straight-through port of the annular tubular channel is connected with external equipment, and an input signal sent by the signal transceiver is transmitted to the external equipment; the microstrip line is arranged between the top layer and the bottom layer of the printed circuit board, the microstrip line is parallel to the annular tubular channel and penetrates through the annular tubular channel, and a coupling port of the microstrip line is connected with the signal transceiver; the annular tubular path couples an input signal to the microstrip line, so that the microstrip line generates a directional coupling signal; the signal transceiver performs power detection on the input signal based on the directional coupling signal. According to the circuit, the situation that the directional coupler is independently manufactured or purchased from an external supplier when the directional coupler is applied to a printed circuit board is avoided, and the cost investment is reduced.

The electric control lock for the intelligent cabinet comprises a lock hook, a lock catch, a driving device and a push rod structure which are arranged on a lock shell, a limiting structure is arranged between the push rod structure and the lock shell, and the limiting structure comprises a limiting guide groove which extends in the movement direction of the push rod structure and is formed in the lock shell. The push rod structure is provided with a limiting guide groove, the limiting guide block is arranged on the push rod structure in a sleeving mode and connected into the limiting guide groove in a sliding mode, and the limiting guide block is elastically connected with the push rod structure through an elastic piece. As the driving device still runs to drive the push rod structure to continuously move for a small section of stroke, the push rod structure continuously moves relative to the limiting guide block by compressing the elastic piece, so that the conditions of movement blocking, abrasion and even jamming between the push rod structure and the driving device are avoided, the driving device is effectively protected, and the service life of the device is prolonged. The service life and the use performance of the product are improved.

The invention discloses a radio frequency circuit, electronic equipment, a radio frequency control method and device and a medium, and belongs to the technical field of communication. The radio frequency circuit comprises a radio frequency module, a power amplifier, a first change-over switch, a duplexer, an antenna switch and an antenna, the two ends of the power amplifier are connected with the radio frequency module and the fixed end of the first change-over switch respectively, the first movable end of the first change-over switch is connected with the first radio frequency end of the antenna switch, the two ends of the duplexer are connected with the second movable end of the first change-over switch and the second radio frequency end of the antenna switch respectively, and the fixed end of the antenna switch is connected with the antenna; the second end of the radio frequency module is connected with the third radio frequency end of the antenna switch; the third end of the radio frequency module is connected with the duplexer; under the condition that the fixed end of the first change-over switch is communicated with the first movable end, the radio frequency circuit works in a half-duplex communication mode; and under the condition that the fixed end of the first change-over switch is communicated with the second movable end, the radio frequency circuit works in a full-duplex communication mode.

The invention discloses a four-frequency-band laminated satellite navigation antenna, which is characterized in that firstly, microstrip antennas are respectively designed for S, B3, L and B2b frequency bands, and a feed mode and a perturbation structure are optimized to improve the performance; the S and B3 frequency bands and the B2b and the L frequency band respectively form a double-layer laminated structure, wherein the short circuit point design of the B3 frequency band antenna enhances the isolation from the S frequency band. And then, a strip line feed network layer is additionally arranged below the B3 and L frequency band antennas, so that high integration and compactness of the antenna are realized. And finally, all antennas are integrated with a feed network to form a complete four-frequency-band laminated antenna, and performance testing is carried out on the complete four-frequency-band laminated antenna. The antenna is compact and light in structure, excellent in performance of each frequency band, capable of working at the same time, high in isolation degree and particularly suitable for occasions with limited space and high performance requirements such as airborne satellite navigation, and the performance and reliability of the antenna are manifested.

The utility model discloses a sealing plug for improving the antistatic capacity of a detonator, which particularly relates to the technical field of antistatic capacity of detonators and comprises a detonator leg wire, a discharge electrode, a limiting boss, an ignition circuit, an insulating tube and an ignition element. Detonator leg wires are respectively connected with discharge electrodes, and the discharge electrodes are far away from the ignition element as far as possible in the design range of the detonator. And the discharge electrode is connected and conducted with the ignition circuit and the ignition element through welding or any other mode. The insulation tube is arranged below the limiting boss, an ignition element is arranged in the insulation tube, an ignition circuit is arranged in the insulation tube, and the ignition element is connected with the detonator leg wire through the ignition circuit. According to the utility model, the position of the discharge electrode is flexibly adjusted, so that the anti-static capacity of the detonator is effectively controlled. The insulating tube is arranged between the ignition element close to or containing the sensitive agent and the detonator shell, so that electric arc generated by discharge at the position is avoided, and the detonator is ensured not to be detonated by the electric arc when being subjected to electrostatic stimulation.

The invention discloses an anti-electromagnetic pulse optical fiber image-transmitting element and a preparation method and application thereof. The method comprises the following steps: matching a core material glass rod and a skin material glass tube, and then drawing the core material glass rod and the skin material glass tube into a primary monofilament; drawing the metal material as a metal rod into a metal wire; the obtained primary monofilaments are subjected to hexagonal densest arrangement, obtained metal wires are arranged according to the rule of clearance type insertion, replacement type insertion or clearance type and replacement type combined insertion, primary composite rods are obtained, and then the primary composite rods are drawn into primary multifilaments; arranging the obtained primary multifilaments into a secondary composite rod, drawing the secondary composite rod into secondary multifilaments, cutting the secondary multifilaments at a fixed length, and arranging the secondary multifilaments into plate sections; and carrying out hot melt pressing molding on the obtained plate section. The technical problem to be solved is that metal wires are additionally arranged in an optical fiber image transmission element to form an electromagnetic shielding layer, so that the invasion of electromagnetic interference such as EMP and the like can be effectively blocked, and signals transmitted by an optical fiber are protected from being influenced.