18results about How to "No electromagnetic interference" patented technology

The utility model discloses a chemical oxygen generator. The oxygen generator comprises a percussion mechanism assembly, a zirconium-containing blanket, an oxygen production flux core assembly, a shell, a purification material assembly, a heat insulation material and an air outlet end, the percussion mechanism assembly and the air outlet end are fixed to the upper end and the lower end of the shell in a sealed mode respectively, the oxygen production flux core is fixed into the shell through a heat insulation material and a zirconium-containing blanket, and the purification material assembly is arranged in a cavity between the bottom of the oxygen production flux core and the air outlet end. A percussion mechanism of the percussion mechanism assembly penetrates through the zirconium-containing blanket and then makes contact with the oxygen production flux core assembly, the percussion mechanism is started through low voltage so that an oxygen production flux core can produce oxygen, and the purification material assembly adsorbs impurities in oxygen production gas of the oxygen production flux core and provides an air channel. And the air outlet end is used for limiting the axial movement of the oxygen production medicine core assembly, the heat insulation material and the purification material assembly in the shell and providing an air outlet channel for purified oxygen. The device has no electromagnetic interference in the oxygen production process, and is safe and reliable to start and low in oxygen production cost.

The invention provides a self-biased very-low-frequency mechanical transmitting antenna driven by piezoelectricity and a preparation method of the self-biased very-low-frequency mechanical transmitting antenna. The preparation method comprises the following steps: step 1, preparing a piezoelectric ceramic material; step 2, cutting and slotting; thirdly, resin is poured; step 4, cutting the layer sheets; step 5, packaging; step 6, polarization treatment; step 7, preparing a bonding layer; and 8, hot-pressing and compounding. Compared with an existing magnetoelectric antenna, the self-biased very-low-frequency mechanical transmitting antenna has the advantages of being self-biased, high in piezoelectric property, miniaturized, free of extra noise sources and electromagnetic interference and the like, has the advantages of being high in stress transmission efficiency, small in ohmic loss and the like, can meet the requirement for miniaturization of the magnetoelectric mechanical antenna, is easy to form a large-scale array, and is suitable for large-scale popularization and application. The magnetic emission performance under zero bias is improved, and the low-frequency communication effect is achieved.

The invention discloses a built-in double-feedback hysteresis solid-state switching circuit which comprises a triode, a first photoelectric coupler, a second photoelectric coupler and a field effect transistor, a resistor R2 is connected between an emitting electrode and a collecting electrode of the triode in parallel, and the input end of the resistor R2 is sequentially connected with a resistor R1 and a voltage stabilizing diode D1 in series. The input end of the voltage stabilizing diode D1 and the second pin end of the second photoelectric coupler are connected to the control end for power supply, the output end of the field effect transistor is connected with a voltage stabilizing diode D2 in parallel, and the output end of the voltage stabilizing diode D2 is connected with a power end for power supply. The circuit has a double-feedback hysteresis circuit function, the reliability of circuit control can be improved, the service life of the circuit is prolonged, and the circuit is high in reliability, long in service life, low in noise, free of sparks, free of electromagnetic interference, wider in application range and suitable for product equipment with requirements for power amplification conversion control.

The application discloses a three-axis optical fiber acceleration sensor based on a silicon light microstructure, which distributes detection light into three mutually orthogonal detection light paths, respectively uses silicon-based micro-mirrors in the light paths to make the detection light incident to mutually orthogonal three side surfaces of a reflective mass, maps the optical power of reflected light according to the position of a reflection point based on the gradient distribution of the reflectivity of the mass surfaces, and feeds back the reflected light to an optical fiber through a coupling component, so as to determine the change of the position of the reflection point according to the identification result of the power state of the reflected light, accurately detect the displacement of the mass in each direction, and calculate the corresponding acceleration. The three-axis optical fiber acceleration sensor can realize high linearity and three-axis simultaneous measurement on a single or small amount of optical fibers, is completely connected through optical fibers, is suitable for a distributed detection scene at a long distance, can be demodulated centrally, and reduces the power consumption of terminal equipment. The application has a simple structure and is easy to mass produce.

This invention relates to the field of biodegradable tabletop manufacturing technology, specifically to a biodegradable and environmentally friendly fiber tabletop and its manufacturing method, comprising: a substrate layer, wherein the substrate layer is provided with a moisture-proof sealing layer, a load-bearing reinforcement layer, a core layer, and an outer reinforcement layer from bottom to top; a functional coating, wherein the functional coating is applied to the top of the substrate layer, wherein the functional coating is provided with a substrate surface treatment layer, an antistatic layer, and a surface sealing coating from bottom to top; and a coating layer, wherein the coating layer is bonded to the top of the functional coating, wherein the coating layer is provided with a functional coating and a peelable protective film from bottom to top. This invention uses biodegradable natural fibers and bio-based resin to construct the substrate layer, the moisture-proof sealing layer to block moisture erosion, the ionic liquid antistatic layer to achieve stable static dissipation without electromagnetic interference, and the biodegradable conductive layer on the surface coating to ensure high X-ray transmittance. The entire material system is completely biodegradable after disposal, making it widely applicable in electronic laboratories and medical environments.

The application discloses a floating photovoltaic power generation device suitable for fish culture, which comprises a corrosion-resistant floating body, a power generation module, a sun tracking module and a self-cleaning module integrated on the floating body to form an integrated independent power supply unit, and photovoltaic panels replace high-voltage power transmission to supply power to the culture device; the sun tracking module realizes sun tracking of the photovoltaic panels through a two-degree-of-freedom deflection structure combined with intelligent control and takes into account underwater culture illumination; the self-cleaning module realizes automatic cleaning of the photovoltaic panels through cooperation of a brush / roller brush and spraying; the floating body can be used alone or composed of a power generation group, and is matched with structures such as buoyancy reinforcement, gravity center lowering and wind and wave resistance linkage, and is suitable for different scales and types of culture water areas. The application realizes on-site power consumption, eliminates hidden dangers of high-voltage power transmission, improves photovoltaic power generation efficiency, reduces operation and maintenance cost, takes into account power generation and culture ecology, and has high practicability.

The present disclosure provides a thermal ablation catheter with a thermocouple, comprising: a thermocouple temperature measuring end, which is in a sandwich structure, including a first electrode, a second electrode and a sandwich weld, wherein the free ends of the first electrode and the second electrode face oppositely and are parallel to each other and close to each other, and are conductively connected through the sandwich weld; a liner, which is a hollow structure for accommodating a thermal ablation component, and the thermocouple temperature measuring end is arranged on the outer circumferential surface of the liner; a heating resistance wire, which is wound around the outer circumference of the liner in a helical shape; wherein the thermocouple temperature measuring end is arranged on the liner between two adjacent turns of the heating resistance wire, the outer surface of the thermocouple temperature measuring end and the outer surface of the heating resistance wire are on the same circumferential surface, the first electrode, the second electrode and the heating resistance wire are arranged in parallel, the thermocouple temperature measuring end is centrally symmetrical, and the first electrode and the adjacent thermal resistance wires, the second electrode and the adjacent thermal resistance wires are centrally symmetrical about the center point of the thermocouple temperature measuring end.

The invention discloses a shape memory alloy material-based hinge which comprises a shell, an end cover is arranged at the end part of the shell, an output shaft is arranged at the central axis position of the shell, a rotor is arranged on the output shaft, a rotor cover plate is arranged on the rotor, a torsion spring is arranged on the output shaft, one torsion arm of the torsion spring is mounted on the rotor cover plate, and the other torsion arm of the torsion spring is mounted on the rotor cover plate. The other torsion arm of the torsion spring is installed on the shell, and a shape memory alloy driving spring is arranged between the shell and the rotor. When the temperature reaches the phase transition temperature of the shape memory alloy, the length of the shape memory alloy driving spring is increased, the rotor is pushed to rotate anticlockwise, the rotor drives the output shaft to rotate, and therefore rotation output is achieved. When the temperature reaches the phase change temperature of the shape memory alloy, the length of the shape memory alloy driving spring is shortened, the rotor is pushed to rotate clockwise under the torque action of the torsion spring, the rotor drives the output shaft to rotate clockwise, and therefore rotation resetting is achieved, and the technical advantages of being free of electromagnetic interference and achieving rotation driving are achieved.

The utility model relates to the technical field of lightning arrester electronic accessories, in particular to an annular piezoresistor disc for a lightning arrester, which comprises a heat dissipation type annular piezoresistor, the heat dissipation type annular piezoresistor comprises a resin insulation outer layer, an electrode layer, a zinc oxide ceramic body, a carbon-free insulation tube and an insulation sealant, the resin insulating outer layer is sleeved on the outer side of the zinc oxide ceramic body, the electrode layer is fixedly connected to the top end of the zinc oxide ceramic body, the carbon-free insulating tube is sleeved on the outer side of the zinc oxide ceramic body, and the insulating sealant is coated on the opposite sides of the electrode layer and the zinc oxide ceramic body. The zinc oxide ceramic body has good high temperature resistance, corrosion resistance and stability; the resin insulation outer layer ensures insulation, and meanwhile, the heat dissipation efficiency is enhanced through a plurality of groups of heat dissipation holes formed in the outer side.

The invention provides a seawater sample test calibration system, which comprises a sample storage module, a probe module, a state control module and a demodulation storage module, the sample storage module is used for storing seawater samples with different salinity in the seawater sample testing process; the state control module is used for controlling the temperature change and the pressure change of the sample storage module; the probe module is used for measuring temperature data of the state control module and acquiring spectral wavelength data of the sample storage module; and the demodulation storage module is used for demodulating and storing the temperature data, the spectral wavelength data, the pressure data of the sample storage module and the absolute salinity data of the seawater sample. The invention also provides a seawater sample test calibration method.

An interference electricity waveform simulation and measurement device with time sequence output is characterized in that the interference electricity waveform simulation and measurement device comprises a cabinet body, an operation table, a main voltage output unit and a PLC control unit, the interior of the cabinet body is divided into an upper part and a lower part, the upper half part of the cabinet body is provided with the operation table, the lower half part of the cabinet body is hollow, and the main voltage output unit is connected with the PLC control unit. A main voltage output unit is arranged in the lower half part of the cabinet body, and a PLC control unit is arranged in the lower half part of the cabinet body; three groups of isolation transformers and voltage regulating transformers are connected in series to form a voltage output circuit, electrical logic control is realized by using a PLC, no breakpoint of voltage conversion is realized, the detector can accurately simulate the interference electricity phenomenon and detect the anti-interference electricity function of a low-voltage electric appliance, and the reliability of the detector is improved. Electrical control intelligence: intelligent voltage time sequence control is designed based on a PLC, man-machine interaction is realized through a touch screen, and reliable operation and no electromagnetic interference are ensured through combination of various low-voltage elements.

The application provides a variable aperture driving motor, a camera device and an electronic device. The variable aperture driving motor comprises a base assembly, the base assembly having a receiving cavity; a lens support body, at least a part of the lens support body being movably arranged inside the receiving cavity; a vane group, a first end of the vane group being arranged at a top end of the base assembly, a second end of the vane group being connected with the lens support body, so that the second end of the vane group can rotate relative to the first end of the vane group; a vibration assembly, at least a part of the vibration assembly being arranged on the base assembly, and the vibration assembly being capable of vibrating relative to the base assembly between an initial position and a first direction and between the initial position and a second direction; and a transmission assembly, at least a part of the transmission assembly being arranged on the vibration assembly and being drivingly connected with the lens support body, the vibration assembly and the transmission assembly being capable of relative movement under the action of friction. The application solves the problem of poor use performance of the variable aperture driving device in the prior art.

The utility model discloses a sorting trolley based on linear motor relates to automatic sorting technical field of commodity circulation, including mounting bracket, the both ends fixed connection of mounting bracket have gyro wheel group, and the one end of mounting bracket is installed with electric roller, the bottom fixed setting of mounting bracket has secondary board. The utility model has the beneficial effect that: through the power supply mode that trolley collector is contacted with slide contact line, compared with wireless power supply, energy transmission efficiency is higher, and cost is lower, and there is no electromagnetic interference problem, can provide the continuous stable electric power for sorting trolley, utilize the elasticity of spring and the rotation of rotary frame, make the current collector brush can be lifted upwards by slide contact line after installation, and always adhere to slide contact line under the action of spring pressure, automatically compensate the installation error and deformation of slide contact line, guarantee the reliability and continuity of contact.

The invention provides an optical element driving device, which comprises a support carrier provided with a first groove; the linear piezoelectric brake is arranged in the first groove, and one end of the linear piezoelectric brake abuts against a driven part; the pre-pressing assembly is arranged in the first groove, one side of the pre-pressing assembly abuts against the side, away from the driven part, of the linear piezoelectric brake, the other side of the pre-pressing assembly abuts against the inner wall of the first groove, and pre-pressing force is provided for the linear piezoelectric brake and the driven part; wherein the driven part is the optical element, compared with traditional electromagnetic driving, the driving device adopts the linear piezoelectric brake to drive the optical element, the driving mode is low in noise and free of electromagnetic interference, and under the pre-pressing effect of the pre-pressing assembly, the friction force between the piezoelectric brake and the optical element is further increased; the driving precision is further improved, and the stability of the device in the operation process is guaranteed.

The utility model discloses a three-phase program-controlled alternating current power source, which relates to the field of three-phase program-controlled alternating current power sources and comprises a digital DSP (digital signal processor) controller + large-scale FPGA (field programmable gate array) module, a three-phase alternating current power output module, a three-phase remembered sine wave generating circuit, a touch screen, a liquid crystal display module, a low-pass filter A, a low-pass filter B and a low-pass filter C, and the touch screen and the liquid crystal display module are connected with the digital DSP controller and the large-scale FPGA module. According to the utility model, the three-phase power source adopts a DSP + FPGA technology, a large-scale FPGA with powerful and flexible functions, an internal and external phase-locked closed-loop control technology, a high-speed and high-precision D / A and a high-fidelity power amplifier to form a new-generation high-precision standard power source, the frequency stability is high, the continuity is good, the precision of output voltage and current can reach 0.01 level, and a single-phase 0-380V, three-phase three-wire, high-precision and high-precision standard power source can be provided. And the three-phase four-wire alternating current voltage is 0-380V.

The invention discloses a high-speed motor centrifugal magnetic adjusting device, which comprises a composite rotating shaft, a magnetic adjusting rotor, a rigid rotor and a magnetic adjusting device, and is characterized in that the composite rotating shaft is divided into a tooth-shaped section with circumferential transmission teeth and an optical axis section with a smooth surface, the magnetic adjusting rotor is sleeved on the tooth-shaped section and can slide along the axial direction, and the rigid rotor is fixed on the optical axis section; the magnetic adjusting devices are arranged on the end face between the magnetic adjusting rotor and the rigid rotor and evenly distributed in the circumferential direction, each magnetic adjusting device comprises a triangular groove piece, a boss piece and a tension ball, and the triangular groove pieces are fixed to the end face of the rigid rotor and provided with guide slopes to form slope sliding rails. The upper end of the boss piece is embedded into a radial groove in the bottom of the flux adjusting rotor, the lower end of the boss piece is in slope sliding fit with the guide slope, and the tension ball is arranged in a spherical cavity in the radial outer end of the boss piece and limited. Centrifugal force is generated through rotation of the tension ball, the centrifugal force is converted into axial component force through the slope sliding rail to push the magnetic field adjusting rotor to move axially, so that the magnetic field coupling strength of the motor is adjusted, and the device is suitable for a wide-speed-range high-speed motor system.

This application discloses a temperature-controlled fan control box and system, belonging to the technical field of fan control boxes. The temperature-controlled fan control box includes a housing, and a power module, a control and protection switch, a thermostat, and a relay integrated inside the housing. The power module's input terminal is connected to an external power source, and its output terminal is connected to the power input terminal of the control and protection switch. The output terminal of the control and protection switch is connected to both the thermostat's power input terminal and the relay coil's power supply terminal. The thermostat's signal output terminal is connected to the relay coil's control terminal to output a start / stop signal. The relay's normally open contact terminal is connected to the fan interface on the housing to control the fan's power supply. This application solves the problems of messy wiring, inconvenient operation, insufficient intelligence, and significant safety risks in traditional temperature-controlled fan systems. It combines integration, intelligence, and portability, making it suitable for small working environments such as laboratories.

The utility model discloses an underwater operation communication device for an electromagnetic automatic hanging-off beam of a hydropower station, which relates to the technical field of underwater operation communication of hydropower stations and comprises a signal conversion buoy device and a signal receiving waterproof device. The signal receiving waterproof device is installed on the electromagnetic automatic hanging-off beam, a receiving system and a demodulation system are arranged in the signal receiving waterproof device, the demodulation system can convert received overwater signals into underwater signals, and the signals are enhanced by a transmitting system through an underwater signal transmitting mechanism and sent to a receiving system in the underwater signal receiving waterproof device. And a demodulation system in the signal receiving waterproof device is electrically connected with the receiving system and is used for receiving the electric signal and decoding an operation instruction. According to the utility model, the problems of electromagnetic interference caused by a complex electrode structure in the electromagnetic automatic hanging-off beam and signal transmission caused by different media on water and under water can be solved, and the electromagnetic automatic hanging-off beam has the advantages of reliable signal transmission and strong anti-interference capability.