9results about How to "Avoid signal loss" patented technology

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.

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.

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.

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 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.

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.