17results about How to "Reliable isolation" patented technology

The invention relates to the technical field of heating and ventilation fault recognition, in particular to a heating and ventilation system fault recognition method based on operation state offset modeling and a control system. The method comprises the following steps: acquiring steady-state operation data of the heating and ventilation system and extracting actual parameters of equipment; inputting the environment and load parameters into the lightweight integrated tree base line model, and outputting an equipment operation parameter reference value; performing baseline drift correction on the reference value in combination with the accumulated operation duration of the equipment, calculating a dynamic difference value between an actual value and a calibration reference value, and constructing an operation state offset characteristic matrix; and inputting the matrix into a preset fault diagnosis rule base, matching a hidden fault in combination with the dynamic tolerance interval and the multi-dimensional Boolean logic, and giving an alarm. Performing reference compensation by using the accumulated operation time length in combination with a linear or exponential progressive attenuation model; on the premise of not consuming high computing power to re-train an underlying algorithm model, the interference of natural physical aging of the equipment on residual calculation is eliminated.

The utility model discloses a high security liquid oxygen blasting device, including a plurality of liquid oxygen explosion pipe, each liquid oxygen explosion pipe all is installed with branch line, a plurality of branch line common installation has main line, the end of main line is installed with two plug -in post, one side of two plug -in post common is equipped with detonator, the top of detonator is installed with protective cover, be equipped with limiting mechanism on the protective cover, be equipped with four adjusting mechanism on the protective cover, the outer wall fixed connection of detonator has two C type handle that is symmetrically set, install rotary button on detonator, be equipped with two insertion slot on detonator, two plug -in post all cooperate with insertion slot. The utility model discloses through the setting of protective cover and its limiting mechanism, can reliably isolate sundries, greatly promote operation security, the adjusting mechanism on protective cover can adjust support leg height flexibly, make control equipment also can keep level on the uneven ground, be convenient for staff operation.

The application provides a primary and secondary fusion column circuit breaker protection adjustment method, comprising: collecting voltage phase data and current waveform data from three-phase positions of a bus in real time, obtaining photovoltaic grid-connected point output proportion and reactive power injection amplitude sequence during low voltage ride through, and reading current district photovoltaic penetration from a district configuration file; according to the voltage phase data and the reactive power injection amplitude sequence, correcting phase offset of each period according to the change rule that reverse power flow gradually increases with the increase of output during photovoltaic output climbing, calculating the initial discrimination range of the maximum sensitivity angle of the directional element; taking the corrected discrimination angle width as an effective window for phase comparison, comparing the current bus voltage phase with the reactive power injection amplitude, identifying the phase pullback phenomenon caused by low voltage ride through, and extracting the phase swing characteristics of the bus voltage.

The utility model provides a novel pressurized injection device, and the syringe can be used for injecting pressurized liquid, the fixed seat is provided on the syringe control module, the movable seat is movably arranged on the syringe control module, the injection cylinder of syringe is fixedly arranged on the fixed seat, the piston rod of syringe is fixedly arranged on the movable seat, and the power source part of syringe control module controls the reciprocating movement of movable seat, thereby controlling the reciprocating movement of the piston rod of syringe, and further comprising detection module for detecting the push -and -pull of piston rod. The output port of syringe is connected with pressurized valve assembly control module, and the pressurized valve assembly control module comprises at least two output ports, the communication between the output port of syringe and different output ports is switched through pressurized valve assembly control module, the output or extraction of liquid from different output ports can be realized. The utility model can replace the doctor to execute balloon pressurization in radiation environment, and can make the complicated valve control and syringe bolus operation automation.

The application relates to the technical field of batteries and discloses a battery cell and a battery pack. The battery cell comprises a shell, an open end of the shell, a pole group arranged in the shell, the pole group comprising a positive pole sheet, a diaphragm and a negative pole sheet arranged in layers, the diaphragm extending out of the upper side walls of the positive pole sheet and the negative pole sheet, a battery cell cover plate assembly comprising a cover plate and a lower plastic, the cover plate being arranged on the open end, the lower plastic being arranged on the lower surface of the cover plate and in the shell, the lower surface of the lower plastic being provided with a separation part and a pair of limiting parts, the pair of limiting parts being respectively arranged at opposite ends of the lower surface of the lower plastic, the separation part being arranged between the pair of limiting parts, the end area of the separation part away from the cover plate being smaller than the end area of the limiting part away from the cover plate, the length of the separation part being smaller than the length of the limiting part, and the separation part and the limiting part both abutting against the part of the diaphragm extending out of the positive pole sheet and the negative pole sheet. The compression amount of the separation part on the diaphragm is reduced, and the possibility of damage of the separation part to the pole group is reduced.

The invention discloses full-automatic equipment for preparing a perovskite layer through a spin-coating method and the spin-coating method of the full-automatic equipment. The full-automatic equipment comprises a glove box mechanism, and a transfer mechanism and a material moving mechanism are arranged on one side of the glove box mechanism. Through the arrangement of the spin-coating mechanism and the packaging mechanism, a gas treatment assembly and a control panel of the glove box mechanism are matched, after parameters such as the spin-coating rotating speed, the reagent dosage and the annealing temperature are preset on the control panel, gas in a treatment box is pumped out through the gas treatment assembly, nitrogen is injected into the gas treatment assembly, and the packaging mechanism drives a packaging pressing plate and a sealing ring to close communicating openings; an internal low-oxygen and low-water environment is maintained; the clamping coating mechanical arm drives the glass substrate clamping piece and the reagent taking and placing assembly to automatically complete substrate clamping, reagent extraction, dropwise adding, spin coating and annealing transfer, workers only need to store and take consumables, the working intensity is low, operation is easy, unified execution of key parameters is achieved, and the production efficiency is improved. The problems of large manual operation error and uneven perovskite layer quality in the prior art are solved.

A pressure sensor includes: a housing having an inner cavity and a medium inlet hole; a substrate disposed in the inner cavity; a water circuit board having a window, the lower surface of which is fixed to the upper surface of the substrate by a first sealant; a pressure core fixed to the upper surface of the substrate, located within the window and electrically connected to the circuit board; a protective gel covering the pressure core being filled into the window; a protective cover having the window facing upwards and communicating with the interior of the protective cover; a connecting tube integrally formed from the interior of the protective cover towards the bottom side, communicating with the medium inlet hole towards the bottom side; the interior of the connecting tube communicating with the interior of the protective cover through a connecting hole provided on the side wall of the connecting tube; the present invention introduces pressure medium to the upper surface of the pressure core through the connecting tube, and reliably isolates the pressure medium from the electronic circuit through the protective cover and the protective gel.

The invention discloses gum barrier protection resin and a preparation method thereof. The resin is prepared from 40 to 70 parts of matrix resin, 20 to 40 parts of diluent resin, 5 to 20 parts of inorganic filler, 5 to 20 parts of ointment matrix, 0.1 to 0.5 part of initiator, 1 to 5 parts of auxiliary initiator and 0.1 to 1 part of polymerization inhibitor. The resin has the characteristics of low heat release and moderate curing speed, can prevent heat generated by curing from burning gingival soft tissues, has higher thixotropy, can be tightly attached to gingiva, can reliably isolate corrosive bleaching agents such as peroxide and the like, and can be used for preparing gingival soft tissues. Adverse reactions such as gingival causalgia and itching caused by solidification heat production and chemical irritant leakage are effectively reduced, and the gel is easy to smear, good in flexibility after solidification and easy to peel off integrally.

The utility model belongs to the wet flue gas desulfurization technical field, concretely relates to a kind of intelligent purging device of mist eliminator differential pressure measuring pipeline, mist eliminator differential pressure measurement transmitter is communicated with mist eliminator high pressure pressure guide pipe, mist eliminator low pressure pressure guide pipe respectively, positive pressure side pipeline shut-off solenoid valve is set on mist eliminator high pressure pressure guide pipe, negative pressure side pipeline shut-off solenoid valve is set on mist eliminator low pressure pressure guide pipe, mist eliminator high pressure pressure guide pipe is connected with flow low switch by positive pressure side pipeline purging solenoid valve, mist eliminator low pressure pressure guide pipe is connected with flow low switch by negative pressure side pipeline purging solenoid valve, flow low switch is connected with compressed air pipeline by compressed air manual ball valve.The intelligent purging device of mist eliminator differential pressure measuring pipeline provided by the utility model is innovatively designed by hardware structure and intelligent control logic, effectively solve the problems, such as low degree of automation, sweeping strategy extensive, insufficient fault diagnosis capability etc.

The invention discloses an EPS low-dropout linear regulator control circuit which is characterized in that the source electrode of a PMOS tube is connected with a power supply, and the drain electrode of the PMOS tube is connected with the input end of a low-dropout linear regulator; the drain electrode of the NMOS tube is connected with the grid electrode of the PMOS tube through a resistor II, and the source electrode is grounded; the output end of the low dropout regulator is connected with the power input end of the microcontroller; a first I / O port of the microcontroller outputs an enable signal, and a second I / O port of the microcontroller is used for monitoring an ignition signal; the cathode of the transient voltage suppression diode is connected with the power supply, and the anode is connected with the grid of the PMOS tube; the anode of the first diode receives an external ignition signal, and the cathode of the first diode is connected with the grid of the NMOS tube through a resistor III; the anode of the second diode is connected with the first I / O port of the microcontroller, and the cathode of the second diode is connected with the grid electrode of the NMOS tube through a resistor III; one end of the resistor I is connected with a power supply, and the other end is connected with the grid of the PMOS tube; one end of the resistor IV is connected with the grid of the NMOS tube, and the other end is grounded; and the resistor V and the resistor VI are connected in series between an external ignition signal and the ground, and the common end is connected with the second I / O port of the microcontroller.

The present application relates to high-end electronic manufacturing technology field, especially to a piezoelectric motor high load coordination device and operation method. The device includes: three-axis motion platform for carrying workpiece and realizing nanometer displacement adjustment; opening and closing mechanism includes fixed bottom plate, jaw cylinder, electromagnetic valve, locking piece, guide shaft and fixed side plate. The electromagnetic valve is connected with the jaw cylinder to control the opening and closing of the jaw. The locking piece includes first locking arm, second locking arm and locking block, the first locking arm is linked with the jaw cylinder through the first transmission member, the second locking arm is linked with the first locking arm through the first transmission member, and the locking piece slides along the corresponding guide shaft; each guide shaft is sleeved with an elastic element for unlocking reset. In the locked state, the transmission member drives the locking piece to expand along the guide shaft, and synchronously abuts against the moving end face of the three-axis motor to realize locking; in the unlocked state, the elastic element drives the locking piece to retract and release the motor. The present application effectively resists external lateral load and overturning moment, and synchronously locks the three-axis piezoelectric motor.

The application provides a gallium nitride device, which comprises a closed ring-shaped gate structure, a dielectric layer, a source field plate, at least a part of the source field plate being formed on one of inner and outer side walls of the dielectric layer, a residual field plate, the residual field plate being formed on the other of the inner and outer side walls of the dielectric layer, the residual field plate being left on the dielectric layer after an etching process for forming the source field plate, and a gap between the source field plate and the residual field plate, so that there is no physical contact and no electrical connection between the source field plate and the residual field plate. The gap is naturally formed between the residual field plate and the source field plate, and there is no physical contact and no electrical connection, so that the contribution of the residual field plate to the gate-source capacitance Cgs is eliminated, the switching loss of the device is significantly reduced, and the switching frequency is improved.

The invention relates to a method for encapsulating an electronic board, said electronic board comprising at least one electronic component (3) and at least one connector (4) having at least one first portion (5) electrically connected to a printed circuit (2), and said method comprising at least: a first overmolding step of covering at least one portion of the printed circuit (2) and the electronic component (3) with a first covering layer (8); a first cooling step of cooling the first covering layer (8); a second overmolding step of covering the first covering layer (8) and the first portion (5) of the connector (4) with a second covering layer (9); and a second cooling step of cooling the second covering layer (9).

The utility model discloses a roof net rack fireproof partition wall blocking structure which comprises a fireproof door assembly and a fireproof blocking assembly. The fireproof door assembly comprises a door opening steel framework and a fireproof door. The fireproof blocking assembly comprises two pieces of inorganic fireproof cloth symmetrically arranged on the two sides of the fireproof door and fireproof rock wool arranged between the two pieces of inorganic fireproof cloth in a filling mode. The inorganic fireproof cloth and the fireproof rock wool are combined and can be attached to the surfaces of the inclined rods of the roof net rack, the roof net rack three-dimensional rod piece staggered structure can be adapted without dismantling or adjusting the original structure, the blocking purpose is achieved, the construction efficiency is improved, the blocking efficiency is better than that of a traditional fireproof plate or a traditional fireproof bag, and the fireproof performance is effectively improved; the fireproof plugging assembly of the composite system does not need to be prefabricated in advance, so that the material cost is reduced; the dynamic separation function of the fireproof door is combined, the connectivity of an overhauling channel at ordinary times is ensured, and reliable isolation of fireproof subareas is achieved through the synergistic effect of door body closing and blocking materials in a fire disaster.

The invention discloses a packaging structure suitable for a silicon optical gyroscope under middle and high voltage, which comprises a metal packaging base and a silicon photonic chip assembly, and also comprises an isolating layer which is connected between the metal packaging base and the silicon photonic chip assembly and has high dielectric strength and good interface stability, compared with the prior art, the isolation layer is formed between the metal packaging base and the silicon photon chip assembly to optimize the electric field distribution and the interface state in the packaging, so that stable and reliable electric field isolation is realized, the voltage endurance capability and the electric field uniformity of the whole packaging structure are improved, and the reliability of the packaging structure is improved. Therefore, the interference of an electric field, thermal stress and environmental stress on the optical phase and polarization stability of the silicon photonic device is effectively reduced.

The invention discloses a high-voltage isolation communication device and high-voltage power supply equipment, and relates to the technical field of wireless communication of power supply equipment. The high-voltage isolation communication device comprises a wireless communication module and an isolation module, the wireless communication module comprises two wireless signal transmission modules, and the two wireless signal transmission modules are oppositely arranged and used for sending and receiving wireless signals. The isolation module comprises two isolation pipes which are oppositely arranged, and the isolation pipes are made of electrical insulating materials and provided with closed ends and open ends; the two wireless signal transmission modules are arranged in the two isolation pipes in a one-to-one correspondence mode, and wireless signal transmission is carried out through the closed ends. Wherein the wall thicknesses of the two isolation pipes are configured to enable the withstand voltage value of the isolation module to be greater than a preset value. The high-voltage isolation communication device can realize the stability and reliability of communication signal transmission under high-voltage impact, and meets the isolation requirement under high-voltage level.

The application belongs to the technical field of transformer cooling, and discloses a dry-type transformer air-air cooling structure and a transformer, which comprise a sealed box body, the inside of the box body is separated into an upper layer cavity and a lower layer cavity by a partition plate, a transformer main body is located in the upper layer cavity and extends into the lower layer cavity at a lower end, an air-air cooler is arranged in the lower layer cavity and has inner and outer circulating air paths which are isolated from each other, an elliptical pipe array is adopted as a core body, and open-hole fins are arranged in the gaps between the pipes, inner and outer circulating fans are arranged in the lower layer cavity, and an air inlet air bellow is arranged on a side wall. The inner circulation sends hot air in the upper layer cavity into the lower layer cavity after the hot air is cooled by the air-air cooler, and then the hot air flows through a transformer air duct from bottom to top and returns to the upper layer cavity; the outer circulation introduces external air into the box body through the air inlet air bellow, and then discharges the air after heat exchange. The structure realizes isolation of cold and hot air, isolation of inner and outer air, uniform and efficient heat dissipation, and can adapt to outdoor harsh environments and significantly reduce operation and maintenance costs.