40results about How to "Avoid breakdown damage" patented technology

The invention discloses an optical module with a blaze protection function. The optical module comprises a light reception assembly used for receiving a light signal, a boost circuit, a current mirror device and an MCU. The boost circuit sends high voltage generated by the boost circuit to a response current output terminal of the light reception assembly through the current mirror device and a current-limiting resistor. The current mirror device receives response current outputted by the light reception assembly, and sends the response current to the MCU after zoom processing. The MCU connects with boost voltage, and adjusts high voltage amplitude outputted by the boost circuit. According to the invention, a high voltage protection circuit is designed at a receiving end of the optical module, so that when a blaze reaches, the light reception assembly is prevented from breakdown and damage, and the optical module is effectively protected. At the same time, through employing a high integrated level transmit-receive one body chip to construct a module circuit, a circuit board dimension is reduced, a SFP interface packaging form is adapted, support of a digital diagnosis function is completed, and maintenance cost of a whole is reduced.

The invention relates to a uniform discharge low-temperature plasma fabric processing device under intelligent atmospheric pressure. The uniform discharge low-temperature plasma fabric processing device under the intelligent atmospheric pressure comprises a main case and a cooling device, wherein a driving discharge roller and a fabric guide roller are arranged in the main case; a plurality of electrode groups are distributed surrounding the periphery of the driving discharge roller; the electrode groups are controlled by a drive mechanism to adhere the driving discharge roller or separate from the driving discharge roller; a laser sensor for detecting fabric joints or foreign matters is arranged on one end of the inlet of the driving discharge roller; automatic liquid dripping needle tubes and camera devices for acquiring water drop angle images are respectively arranged on one end of the inlet and one end of the outlet of the driving discharge roller; the drive mechanism, the laser sensor and the camera devices are respectively connected with a control system. According to the uniform discharge low-temperature plasma fabric processing device under the intelligent atmospheric pressure provided by the invention, the fabric is put in a continuously uniform electric field, so that the damage on the surface of the fabric due to uneven discharge can be effectively avoided; meanwhile, water drop angle data analyses are automatically carried out before and after processing, and the tension of the surface of the fabric after processing is intelligently controlled, so that the working efficiency and the processing yield are remarkably improved.

The invention discloses a stray current measuring method based on fast Fourier transform. The stray current measuring method based on fast Fourier transform includes the following steps: acquiring stray electric signals of a buried steel pipeline; performing signal conditioning on the acquired stray electric signals, and obtaining continuous time domain analog signals; utilizing a high accuracy analog-to-digital conversion chip to sample the continuous time domain analog signals in a fixed sampling frequency f0, and performing analog-to-digital conversion to obtain discrete time domain data signals; and using a cycle T to perform Fourier transform on the N discrete time domain data signals to obtain frequency domain signals of 0Hz-508Hz. The stray current measuring system based on fast Fourier transform includes a detection circuit, a signal conditioning circuit, a sampling and analog-to-digital conversion module and a signal processing chip. The stray current measuring method and system based on fast Fourier transform can obtain the source and the magnitude of the stray current born by the test point according to the analysis result, can make an accurate determination about protection of the pipeline, and have the advantages of high interference immunity and high accuracy.

The invention discloses a bipolar high-voltage pulse power supply capable of generating uniform low-temperature plasma, and relates to the field of low-temperature plasmas. The bipolar high-voltage pulse power supply comprises a rectification filtering module, two resonance charging modules, a double-primary winding pulse transformer and a control module, each resonance charging module comprises a resonance inductor, a resonance diode, a resonance capacitor and a semiconductor switch, wherein one ends of the resonance inductors serve as input anode ends of the resonant charging modules, second ends of the semiconductor switches serve as an input cathode end and an output cathode end of the resonance charging modules, the other ends of the resonance capacitors serve as output anode ends of the resonant charging modules, one end of a secondary coil, the first end of a first primary coil and the first end of a second primary coil are dotted terminals respectively, the control module obtains bipolar high-voltage pulses on the secondary coil by controlling alternate conduction of the two semiconductor switches, the number of the semiconductor switches is reduced, and uniform low-temperature plasmas are generated more stably.

The invention relates to a silicone plastic package rectifier diode. The silicone plastic package rectifier diode comprises a diode main body which comprises a PN junction, a positive terminal and a negative terminal which are located on a same silicon substrate, the positive terminal and the negative terminal are respectively located at two ends of the silicon substrate, a leading-out line is respectively welded on the positive terminal and the negative terminal, the silicon substrate and partial leading-out lines welded with the positive terminal and the negative terminal are packaged in an epoxy resin tube in a plastic mode, and a coating capable of clearly displaying working parameters of the diode main body is coated outside the epoxy resin tube. The silicone plastic package rectifier diode is simple in structure, the diode main body is packaged in the epoxy resin tube in a plastic mode to guarantee that electrical characteristics of the diode main body are not influenced, the coating capable of clearly displaying working parameters of the diode main body is coated outside the epoxy resin tube to avoid changing into a tube which does not meet requirements for the working parameters when a new silicone plastic package rectifier diode is changed, and accordingly breakdown and damage of the silicone plastic package rectifier diode are avoided.

The invention provides a heat dissipation system for a high-voltage frequency converter of adesulfurization and denitrification induced draft fan, and relates to the technical field of environment-friendly desulfurization and denitrification production. The system comprises a frequency converter assembly and a heat dissipation assembly, the frequency converter assembly is arranged in a control room, the frequency converter assembly comprises a transformer cabinet, a power unit cabinet and a switching cabinet, the transformer cabinet and the power unit cabinet are each provided with a cabinet top fan, the heat dissipation assembly comprises 10P air conditioners and 5P air conditioners, and the 10P air conditioners are located on the two sides of the rear end of the interior of the control room. The two 10P air conditioners and the three 5P air conditioners are arranged to perform internal circulation heat dissipation, air is not extracted from the outside, insulation breakdown damage of internal electrical components caused by accumulation of a large amount of conductive dust in the frequency converter assembly can be avoided, the service life of the electrical components is prolonged, the fault rate of the frequency converter assembly is reduced, no hot air duct or negative pressure exists, overload operation and over-temperature burning loss of a cabinet top fan of the frequency converter assembly can be avoided, and the service life is prolonged.