35results about How to "Improve electromagnetic anti-interference ability" patented technology

The invention discloses a multigroup lightning protection optical cable which comprises cables and a coating layer covering the cables, wherein the cables are made of multigroup cable cores covered by an inside liner; and the coating layer comprises a shielding layer for shielding the cables, an outer jacket covering the shielding layer and a grounding layer arranged between the inside liner and the shielding layer. The multigroup lightning protection optical cable can prevent lightning from damaging communication equipment, and can effectively shield the interference of an electric magnetic field generated by the cables on other communication cable signals and the interference of an external magnetic field on the cables.

The invention discloses an optical fiber liquid level sensor and a measuring method thereof. The optical fiber liquid level sensor comprises an elastic wafer, a threaded cylinder, an incident optical fiber and a receiving optical fiber, wherein the elastic wafer is stuck on the bottom part of the cylinder; the incident optical fiber and the receiving optical fiber are symmetrically stuck on the elastic wafer along the diameter direction; a gap is formed between the incident optical fiber and the receiving optical fiber. The optical fiber liquid level sensor and the measuring method have the beneficial effects that influence factors of liquid density variation and accelerated velocity on liquid level measurement can be eliminated, so that more accurate liquid level information is obtained. According to the optical fiber liquid level sensor, the liquid level information is measured in a non-contact manner, so that the measurement is not restricted by properties of to-be-measured liquid, the possibility of explosion risk caused by electric sparks generated due to electrical measurement is prevented, therefore the anti-explosion performance is realized; meanwhile, a sensing part is easily installed, the price is low, the situation that the sensing part of the optical fiber sensor is polluted by the liquid is prevented, the stability of the sensor in the measurement process is guaranteed to a certain extent, and the electromagnetic interference resistance performance is good.

The present invention belongs to the field of radiation detection technology. The radiation imaging array solid detector includes flash crystal of cesium iodide or cadmium tungstate, photodiode coupled with the flash crystal and casing holding the flash crystal and the photodiode. The casing consists of metal cover plate, metal bottom plate, front end cover, back end cover and two side plates. The metal cover plate is provided with several slots for heavy metal partitions to set in and to separate flash crystals to form several solid detectors. The photodiode is led out through insulators penetrating the metal bottom plate and rubber pad, and there are rubber pads for insulation between different parts. Compared with available technology, the present invention has high detection efficiency, simple production process, less dead area and other advantages.

The invention discloses a multi-parallel inverter motor speed regulating system and a control method of the multi-parallel inverter motor speed regulating system. The system is formed by connecting multiple inverter modules in parallel. The direct current sides of multiple inverter sub modules are directly connected with a direct current power supply with a direct current bus capacitor in parallel. The alternating current sides of the multiple inverter sub modules are connected with multiple sets of smoothing reactors respectively in series and then directly connected in parallel to drive an alternating current motor. By the adoption of the structure, modularization expansion of the motor speed regulating system is easily conducted, and the fault-tolerance performance of the motor speed regulating system is enhanced. By means of a random SVPWM method based on carrier phase shifting, switching frequency of parallel inverters is equivalently improved, switching subharmonic energy within narrow frequency bands is equalized, the harmonic performance of output currents of the parallel inverters is improved, and electromagnetic interference resistance of the motor speed regulating system is enhanced. By the adoption of a space vector synthetic technology for dynamically allocating SVPWM zero vectors, zero-sequence circulating currents between the parallel inverter modules are effectively eliminated, and normal operation of the system is guaranteed.

The invention relates to a medical image viewing device capable of being applied in internet of things. The medical image viewing device comprises a shell, a viewing window arranged at the front of the shell, and an illumination mechanism arranged in the shell; the illumination mechanism comprises a first illumination module and a second illumination module; the first illumination module comprisesa vertically arranged fixed plate and a plurality of first illuminating lamps; in the medical image viewing device based on the internet of things, a transmission gear is driven to rotate by a driving gear, and then a transmission shaft can correspondingly rotate, the transmission shaft controls a transmission rod to realize the angle adjusting of a second illuminating lamp, thereby illuminatinga specific region and improving viewing reliability. Not only that, the model of an integrated circuit is BTS432D in a state indication circuit, and the integrated circuit has high electromagnetic interference resistance, thereby guaranteeing that the interference resistance and the device reliability are improved in the work process of the device.

The invention provides a method for operating an LED lamp (100) and an LED lamp (100) suitable for the method. The LED lamp (100) comprises at least one first LED assembly (1) and a second LED assembly (2), wherein the first LED assembly (1) and the second LED assembly (2) emit lights with different spectrums during operation , and it is preferred that the proportion of blue light emitted by the first LED component (1) is higher than that of the second LED component (2). Controlling the light emitted by the first LED assembly (1) and the second LED assembly (2) in the LED assembly (1, 2) according to the preset spectral control curve (STK) with respect to time, preferably physiological periodicity The specific gravity within the total spectrum. In case a change signal is received from the user interface, the spectral control curve (STK) is changed at least locally, and this local change is at least partially taken into account automatically when the spectral control curve (STK) is subsequently re-run.

The invention relates to a nuclear magnetic resonance spectrometer gas circuit and temperature control system based on an LAN (Local Area Network) and a CAN (Controller Area Network) bus, belonging to a nuclear magnetic resonance spectrometer and providing a nuclear magnetic resonance spectrometer gas circuit and temperature control system based on the LAN and the CAN buses, with characteristics of strong independence and reliability, simpler structure, easy expansion, convenient maintenance, and the like. The nuclear magnetic resonance spectrometer gas circuit and temperature control system is provided with a central processing unit, a display unit, a CAN interface circuit, a rotating speed measuring circuit, a pneumatic valve drive circuit, a temperature measuring unit and a heating unit, wherein the central processing unit is connected with a computer; the central processing unit is connected with the display unit, the CAN interface circuit, the rotating speed measuring circuit, the pneumatic valve drive circuit, the temperature measuring unit and the heating circuit by adopting a standard CAN bus cable; the input end of the rotating speed measuring circuit is externally connected with a photoelectric rotating speed sensor, and the output end of the pneumatic valve drive circuit is externally connected with an electronic air valve; and the temperature measuring unit is externally connected with a thermoelectric couple, and the heating circuit is externally connected with a heating wire.

The present invention relates to radiation detection technology. The connecting device for detector module circuit in container detecting system includes comprehensive cable, connectors connected to two ends of the comprehensive cable and connecting sockets mounted onto the end oft detector module and matching the connectors. Structurally, the connecting device features the comprehensive cable including several power source lines and several signal lines, the connectors with several convex contacts in the ends for connection with the power source lines and the signal lines, and the connecting sockets with corresponding concave contacts intelligent ends. Compared with available technology, the present invention has simple cable installation and connection, low cost, raised safety and raised electromagnetic interference resisting performance.

The invention belongs to the technical field of instrument detection, and provides an anti-interference detection method, circuit and electronic equipment for leak detection equipment, wherein the anti-interference detection method for leak detection equipment comprises the steps of: selecting a frequency band for a collected input signal , obtain a target frequency segment, the input signal includes an audio signal and a display signal; amplify the audio signal of the target frequency segment through the first branch and output the target audio information, and convert all the target frequency segment. The display signal is amplified by the second branch and then outputs the target display information. The invention achieves the effect of improving the anti-interference ability of the environment by selecting the frequency band of the collected input signal according to the on-site environment; and divides the input signal into two independent signals and processes them through two independent branches to prevent the interference between the signals. Mutual interference, thereby improving the electromagnetic anti-interference ability of the instrument itself, ensuring the authenticity of the audio signal, thereby improving the accuracy of the instrument test.

The invention discloses a method and a device for checking electromagnetic compatibility of a stabilized voltage power supply of a switch. The method comprises the following steps: bridge connecting an RC loop between a primary and a secondary of the power supply; checking the voltage waveform at the both ends of resistators on the RC loop; and judging the electromagnetic compatibility of the stabilized voltage power supply of the switch according to the checked voltage waveform. By the invention, the electromagnetic compatibility of the stabilized voltage power supply of the switch can be checked conveniently and rapidly in a low cost.

The invention relates to the technical field of automotive electronic control. An intelligent management system of an automobile power supply comprises an MCU (Microprocessor), a power supply processing circuit, a plurality of intelligent power controlled circuits, a temperature monitoring unit and a CAN (Controller Area Network) communication unit, wherein an input end of the power supply processing circuit is connected to a storage battery and an engine power supply; an output end of the power supply processing circuit is connected to the MCU; input ends of the intelligent power controlled circuits are connected to the storage battery, the engine power supply and the MCU; output ends of the intelligent power controlled circuits are connected to a power supply end of an automobile externally connected ECU (Electronic Control Unit); the circuits are used for detecting current and voltage of the storage battery and the engine power supply, simultaneously receiving a control signal of the MCU, and adjusting power output according to the control signal so as to output a plurality of paths of controlled output and constant-voltage output; the temperature monitoring unit is arranged on heating areas of a storage battery bin and an engine bin; an output end of the temperature monitoring unit is connected to the MCU; and a signal end of the CAN communication unit is connected with the automobile externally connected ECU and the MCU. The intelligent management system of the automobile power supply is applicable to automobiles applying the CAN bus technology.

The present invention, radiant imaging solid detector, belongs to the field of radiodetection technology. The solid detector includes scintillating crystal and coupled photodiode held in some casing. The casing includes outer shell and lower cover with lightproof and moistureproof paint painted in the sealing part, and has rubber pad for fixing the scintillating crystal inside the casing and fixing and leading out the photodiode poles. Compared with available technology, the present invention has the features of being lightproof and moistureproof, simple structure, etc. When used, several solid detectors may constitute detector array capable of eliminating cross-talk of flash, strengthening electromagnetic antijamming capacity and raising imaging definition.