14results about How to "Improve anti-electromagnetic interference performance" patented technology

This invention discloses a differential VGA signal decoding and display device, relating to the display field. It includes a signal input module, an ESD protection module, a differential receiving module, a synchronization separation module, an image decoding driver module, a display module, an audio processing module, and a control module. These modules are interconnected and work together to decode, process, and display differential VGA signals. This differential VGA signal decoding and display device solves the problems of short transmission distance, weak anti-interference capability, limited resolution, and high power consumption associated with traditional VGA interfaces. It also achieves full compatibility with traditional VGA devices, integrating audio processing, local playback, intelligent signal enhancement, and remote monitoring and management functions. It achieves reliable conversion from analog to differential signals, supports high-definition display, and has a transmission distance of up to 50 meters, while maintaining full compatibility with traditional VGA devices. This technology is particularly suitable for professional fields such as industrial automation and medical imaging, meeting the diverse display and intelligent operation and maintenance needs of professional scenarios.

This utility model discloses a residual voltage detection module and device for distribution network lines, relating to the field of residual voltage detection technology. It solves the technical problem of urgently needing a residual voltage detection circuit capable of quickly and reliably identifying residual voltage in distribution network lines and adapting to different power grid environments. The module includes, in sequence, an input control circuit, a residual voltage judgment circuit, a residual voltage blocking circuit, an isolation output circuit, and a residual voltage reset circuit. The input terminal of the input control circuit is connected to the first and second power supply circuits of the distribution terminal. The input control circuit controls the start or stop of the residual voltage detection module. The residual voltage judgment circuit detects the presence of a residual voltage signal in the distribution terminal. The residual voltage blocking circuit blocks the residual voltage signal. The isolation output circuit isolates and outputs the blocked residual voltage signal to the residual voltage reset circuit. The module provided by this utility model has high reliability, fast response speed, and can effectively adapt to complex and changing operating environments.

This invention relates to a method for modeling the capillary evolution of humidity-related adhesion forces under micrometer-scale probes. This method establishes a physical relationship between ambient relative humidity and Kelvin radius, and calculates the Kelvin radius in conjunction with the initial volume of the liquid bridge, thereby constructing a parameterized model of capillary forces that characterizes the change in liquid bridge volume with ambient humidity. The influence of the liquid film on the solid surface is considered during model construction, enabling the model to more realistically reflect the formation and evolution of liquid bridges in actual micro / nano interfaces. As the two surfaces gradually move away, the relationship between the curvature of the liquid bridge interface and the Kelvin radius is established under the condition that the liquid bridge volume remains constant, thus achieving a continuous description of the evolution of capillary and adhesion forces during the separation process between the micrometer-scale probe and the sample interface. Furthermore, experimental measurements and model verification of micrometer-scale interface forces are conducted using a self-developed fiber Bragg grating probe.

The utility model discloses a kind of inertial navigation system for coal mining machine, optical fiber inertial navigation equipment is mounted on coal mining machine, the signal of optical fiber inertial navigation equipment is wirelessly transmitted to wireless coverage unit through CPE antenna on body, wireless coverage unit is connected with switch, the data of wireless coverage unit is forwarded, exchanges, central control host computer is connected with switch, receives the data forwarded from switch;Coal mining machine is connected with switch or central control host computer through communication line.The utility model system is high in integration, realizes multi-source data real-time integration, equipment collaborative management and control, greatly improves working face automation efficiency.

This application relates to the technical field of thyristor drive circuits, and in particular to a Schmitt trigger circuit for a thyristor magnetization system. It includes an isolated power supply unit, an energy storage unit, a trigger pulse receiving unit, and a Schmitt strong pulse forming unit. The isolated power supply unit includes an isolation transformer and a filter capacitor. The energy storage unit consists of a charging resistor and an energy storage capacitor connected in series. The trigger pulse receiving unit receives external trigger commands. The Schmitt strong pulse forming unit includes an NPN transistor, a MOSFET switch, etc. These units cooperate with each other. The application also covers parameter limitations and electrical isolation settings for each component. This circuit can be applied to high-power, high-voltage, strong magnetic pulse magnetization equipment. This application achieves electrical isolation and equivalent Schmitt trigger characteristics, providing nanosecond-level steep-front strong trigger pulses to the thyristor, thereby reducing turn-on losses, improving di / dt tolerance, and enhancing electromagnetic interference immunity.

The utility model discloses a kind of high-temperature-resistant composite cable, including cable body, the cable body includes rubber strip, the outside of the rubber strip is evenly provided with multiple core wires, adjacent the core wire between is provided with partition, the core wire, partition and rubber strip are wrapped by first wrapping layer, the outside of the first wrapping layer is coated with shielding layer, the outside of the shielding layer is evenly provided with multiple buffer strips, multiple the buffer strip is coated outside shielding layer by second wrapping layer, the outside of the second wrapping layer is coated with sheath.The utility model, rubber strip improves the tensile property of cable, the outside of rubber strip is evenly provided with multiple core wires, adjacent core wire between is provided with partition, partition can be separated to core wire, avoid mutual interference between core wire, shielding layer improves the anti-electromagnetic interference effect of cable, the outside of shielding layer is evenly provided with multiple buffer strips, and buffer strip improves the buffering performance of cable.

The utility model discloses a kind of force-sensitive trigger probe of annular microstructure optical fiber sensing, it is related to precision measurement technical field, to solve the integration of existing probe structure and FBG sensor generally not high, the problem of limited measurement accuracy improvement;A kind of force-sensitive trigger probe of annular microstructure optical fiber sensing, including support unit, support unit is fixedly connected with annular sensitive unit, the central position of annular sensitive unit is provided with trigger probe unit, annular sensitive unit includes several rings, and sensitive beam is arranged between adjacent rings and between trigger probe unit and nearest ring, and optical fiber grating sensing module is arranged on sensitive beam.The utility model technical scheme considers sensitivity and stiffness, through the combination of multi-ring structure and sensitive beam, both ensure overall stiffness, and realize high sensitivity strain detection by sensitive beam.

This invention belongs to the field of generator fault detection technology, and provides a winding insulation detection method and system considering axial eccentricity faults in generators. The method includes: building a simulation system to independently simulate static eccentricity, dynamic eccentricity, and tilting eccentricity in the generator axial direction; deploying ultrasonic sensors on the generator winding insulation to collect ultrasonic signals generated by wear defects in the winding insulation; extracting the arrival time of the ultrasonic signals using an energy detection method and calculating the arrival time difference, and combining this with a genetic algorithm to locate the wear defects in the winding insulation; performing synchronous sampling and filtering preprocessing on the ultrasonic signals to achieve a quantitative assessment of the wear state of the winding insulation. The present invention is reliable and easy to implement, and the proposed detection method has the characteristics of strong anti-electromagnetic interference capability and high positioning accuracy, and can solve the axial eccentricity simulation problem of vertical hydro generators with a small-volume, low-cost, and practical device.

This utility model discloses an electromagnetic compatibility (EMC) testing device for automotive starting function, relating to the field of automotive whole-vehicle EMC testing technology. It includes a contact head, a cylinder, an angle adjustment unit, a spatial position adjustment unit, a reversing valve, and an air supply unit. The contact head is used to contact the automotive start button. The cylinder includes a cylinder body and a piston rod. The end of the piston rod is connected to the contact head. The spatial position adjustment unit and the angle adjustment unit are used to adjust the spatial position and direction of the contact head, respectively, so that it can be aligned with the automotive start button. The reversing valve connects to the two inner chambers of the cylinder through two branches to control the cylinder's movement. The air supply unit connects to the reversing valve to supply air to it. This utility model designs three button control methods. Compared with the prior art, this automotive starting function EMC testing device has strong versatility and anti-interference capabilities, and can be flexibly applied to radiation immunity testing of automotive starting function according to vehicle testing requirements.

This utility model provides a remote control device for a high-voltage disconnect switch, including a main support and a disconnect switch. The disconnect switch is mounted on the main support and has an open position and a closed position. The main support also has a control structure for controlling the opening and closing of the disconnect switch. The control structure includes a connecting frame fixedly mounted on the main support, a pipe body mounted on the connecting frame, a first outlet pipe and a second outlet pipe connected to both ends of the pipe body, and the outlet ends of the first and second outlet pipes are respectively connected to a counterweight barrel with control components. Valve bodies are respectively installed between the first and second outlet pipes and the pipe body. This utility model significantly improves the operational stability of the equipment under harsh working conditions, while the remote control function greatly improves operational efficiency and safety.

This invention relates to a microscale six-degree-of-freedom motion measurement method and device based on a light intensity distribution model, belonging to the field of precision optical metrology and micro / nano manipulation. The device includes a laser diode and laser coupler, a multi-core optical fiber, a light-modulated target, a multi-channel photodetector, a data acquisition card, and a processor. The multi-core optical fiber consists of a single transmitting fiber and multiple uniformly surrounding receiving fibers. The light-field distribution modulation target has a spatial geometric reflection structure to break the spatial symmetry of the reflected light path. A forward mathematical model is established to describe the nonlinear functional relationship between the six-degree-of-freedom pose of the light-modulated target and multiple independent optical power signals. The six-degree-of-freedom pose is calculated based on the measured optical power values. This invention effectively overcomes the measurement blind zone of traditional fiber optic sensors while maintaining a simple system structure, small size, strong anti-interference capability, and low cost, achieving synchronous, high-precision, and robust measurement of microscale spatial six-degree-of-freedom displacement.

This utility model belongs to the technical field of reversing light drive circuits, specifically an integrated drive circuit for a rear fog reversing light, including a rear fog light control module, a reversing light control module, and an LED chip module. The rear fog light control module is connected to both the reversing light control module and the LED chip module. The LED chip module is also connected to both the rear fog light control module and the reversing light control module. In this application, the LED driver ensures that the LED current remains constant when the input voltage changes from 9V to 16V, allowing the LED brightness to vary within a small range, thus ensuring consistent product brightness. It simplifies the assembly process, reduces manual soldering and wiring harness installation time, and improves production line efficiency. Compared to discrete component circuits, the LED driver chip-level integrated solution has stronger vibration and electromagnetic interference resistance, reducing the probability of failure.

The utility model discloses a kind of multilayer aluminum substrates, including first circuit layer, first insulating layer and second insulating layer stacked on the both sides surface of the first circuit layer, first aluminum plate and second aluminum plate respectively stacked on the surface of the first insulating layer and second insulating layer, third insulating layer and fourth insulating layer respectively stacked on the surface of the first aluminum plate and second aluminum plate, second circuit layer and third circuit layer respectively stacked on the surface of the third insulating layer and fourth insulating layer, and third aluminum plate connected with the second circuit layer or third circuit layer by bonding layer.The multilayer aluminum substrate provided by the utility model can provide more wiring space, so that the circuit board can adapt to complex circuit design.

The utility model provides an inertia combined navigation system for airplane, including the power module of inertia combined navigation system includes the isolation type DC DC power unit and non -isolated type DC DC power unit in series, and is equipped with two common mode filter circuitry at the input port of isolation type DC DC power unit, is equipped with LC filter circuitry between the output port of isolation type DC DC power unit and the input port of non -isolated type DC DC power unit, every switch pin of non -isolated type DC DC power unit is equipped with RC absorption circuitry, and the distance of target RC absorption circuitry distance and the switch pin of this target RC absorption circuitry connection is less than first preset distance, and the distance of target RC absorption circuitry distance and the ground pin of this target RC absorption circuitry connection is less than second preset distance. The utility model provides an inertia combined navigation system with higher electromagnetic compatibility.