1469 results about "High voltage source" patented technology

Embodiments of the present disclosure relates to an integrated circuit including an array of memory cells having the word lines and high-voltage power lines positioned on one side of the transistors and the bit lines and low voltage power lines positioned on the other side of the transistor. The memory cells according to the present disclosure also improve routing efficiency, thus, removing bottleneck of further scaling both SRAM cell.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The invention provides a self-adaptive dual-energy pulse X-ray detection system and a detection method. The self-adaptive dual-energy pulse X-ray detection system comprises a dual-energy X-ray emission module, a pulse modulation and high-voltage power supply module, a detector array and a self-adaptive control system, wherein the dual-energy X-ray emission module is in signal connection with the pulse modulation and high-voltage power supply module; the detector array is positioned on the opposite side of a detected object; and the self-adaptive control system is in signal connection with the pulse modulation and high-voltage power supply module. The self-adaptive dual-energy pulse X-ray detection system and the self-adaptive dual-energy pulse X-ray detection method have high penetrating power, and the problems of fuzzy recognition and generation of image blind areas can be effectively avoided.

The invention discloses a multiband high-voltage power supply control system and a normalization control and protection method thereof, and relates to the technical field of power supply control, and the method comprises the steps: collecting multi-mode signals of S, C and Ku band high-voltage power supply systems and a cooling system; an SDAE deep network and an integrated learning AdaBoost framework are combined to construct a fault diagnosis model, and a fault type and confidence are obtained according to signal features; when a fault occurs, high-voltage output of a corresponding power supply unit is cut off and reported through an isolation interface, and a deep reinforcement learning agent is used for carrying out protection action intelligent decision making; a digital twinborn model of a power supply unit is constructed, an improved grey wolf optimizer is used for multi-task collaborative optimization, optimized system parameters are acquired and issued to a PLC for execution, and waveband output stability is ensured. According to the invention, high reliability, rapid response and intelligent operation and maintenance of the multi-band high-voltage power supply system are realized through deep integration of multi-source signal acquisition, intelligent fault diagnosis, adaptive protection decision and digital twinning optimization.

Sensing circuitry for an implantable stimulator device is disclosed. The sensing circuitry includes a downselector with switching networks used to couple selected electrode nodes and / or DC voltages to one or more sense amps. The switching networks comprise high-voltage devices that are controlled in accordance with a high-voltage power supply voltage VH. VH may be generated by a boost circuit, and may be set to the higher of a boosted voltage and a compliance voltage that powers the stimulation circuitry. The switching networks include three switches, some of which may comprise transfer gates. The downselector can be controlled to couple one or more electrodes nodes to a particular sense amp during sensing durations. The downselector can also be controlled during stimulation durations to couple one or more electrodes nodes together, thus supplementing operation of the stimulation circuitry.

The invention provides a high-voltage power supply and distribution system for an electric vertical take-off and landing aircraft, and belongs to the technical field of power supply and distribution regulation control systems, and the system comprises a main bus bar module which is used for the current collection and distribution of an energy storage battery and a ground DC bus high-voltage power supply, and is provided with a fuse for overload cut-off; the output bus bar module comprises six mutually-independent motor load output channels and two mutually-independent high-voltage output channels, and each motor load output channel supplies power to the two symmetrically-arranged motors at the same time and is used for distributing 12 motor loads and 2 high-voltage output loads; the power-on buffer module is used for power-on buffer of 12 paths of motor loads and restraining power-on impact current; the self-locking control module has a motor load output control self-locking function, and can keep normal output of motor load current under the condition that the monitoring unit fails; and the monitoring unit module is used for monitoring the input voltage, the output voltage and the load current, and performing power-on buffer control and high-voltage contactor self-locking control on the motor load.

A disclosed nondestructive testing device for internal defects of a copper-aluminum composite board comprises a base plate, the base plate is connected with a C-shaped frame through an integral moving device, the upper end and the lower end of the C-shaped frame are respectively provided with an X-ray source and a ray detector, and the X-ray source and the ray detector are oppositely arranged; a signal conversion device, a high-voltage power supply and a control host are further arranged on the bottom plate, the high-voltage power supply is connected with the X-ray power supply, and the ray detector is in electric signal connection with the control host through the signal conversion device. The X-ray principle is utilized to irradiate the copper-aluminum composite board, the density difference in the board is reflected through the X-ray imaging board, the internal defects of the board are automatically judged through an algorithm, X-rays penetrate through the detected board and do not affect or damage the board, and the non-contact detection mode is compared with a destructive detection means, so that the detection accuracy is improved. The problem that a product is damaged in the detection process is solved.

The invention discloses a high-stability high-voltage power supply, and belongs to the technical field of high-voltage power supplies, the high-stability high-voltage power supply comprises a clamping assembly, the clamping assembly comprises a fixing part and a lifting part, a heat dissipation area is formed between the lifting part and the power supply, a heat dissipation assembly is arranged in the clamping assembly, and the heat dissipation assembly comprises a fixed-point heat dissipation part and an auxiliary heat dissipation part corresponding to a heat source area, and a liquid circulation system is integrated, so that multi-mode collaborative heat dissipation of the power supply is realized. Through active suction heat dissipation of the corrugated cover and contact type liquid cooling of the elastic water bag, the problem of local overheating is accurately and efficiently solved, the heat dissipation efficiency and temperature uniformity are remarkably improved, air cooling and liquid cooling work cooperatively, the overall heat dissipation capacity is enhanced, meanwhile, two-way buffering is formed through the pre-pressing water bag and the bottom elastic cushion during transportation of the same structure, and the heat dissipation efficiency is improved. And excellent anti-vibration and anti-impact protection is provided, heat dissipation and protection functions are integrated, and long-term high-stability operation of the high-voltage power supply is guaranteed.

The invention belongs to the technical field of power electronics, and particularly discloses a high-stability and high-dynamic-performance high-voltage power supply which comprises a main circuit, a detection circuit and a control circuit. The main circuit comprises a first LCC resonant converter module, a second LCC resonant converter module and a follow current resistor; the control circuit is used for taking the output voltage of the n LCC resonant converter sub-modules as a control quantity and changing the driving signal frequency, phase and duty ratio of the LCC resonant converter sub-modules; and the driving signal frequency, the phase and the duty ratio of the second LCC resonant converter module are obtained according to the driving signal frequency, the phase and the duty ratio of the n LCC resonant converter sub-modules, so that the output voltage amplitude of the second LCC resonant converter module is equal to the output voltage ripple amplitude of the first LCC resonant converter module. The high stability of the output voltage can be ensured while the response speed of the output voltage can be greatly improved.

The utility model relates to the related field of voltage reference circuits, in particular to a voltage reference circuit with a simple structure and capable of realizing high-voltage application, which comprises a resistor R5 connected with a high-voltage power supply, MOS (Metal Oxide Semiconductor) transistors PM1, PM2 and PM3, triodes Q0, Q1 and Q2, and MOS transistors NM0 and NM5, compared with a traditional structure, the circuit is simple in structure and easy to implement, and due to the fact that an operational amplifier and a band-gap reference circuit are not needed, and the number of electronic components is small, the circuit area is greatly reduced; the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit is simple in structure, low in process requirement, free of a high-voltage process and free of additional special devices, adopts a low-voltage process to enable the circuit to generate a low-voltage reference capable of bearing a high-voltage power supply of more than 100V, achieves the purposes of high-voltage resistance, voltage reduction and voltage stabilization, and has the characteristics of low cost and convenience in design, so that the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit has very high use value and application value and is suitable for popularization.

The invention belongs to the technical field of spinning, and particularly relates to atmosphere-controllable needleless electrostatic spinning equipment and a method for preparing micro-nano fibers. The equipment comprises a needleless electrode wire, a liquid brushing tank, a direct-current high-voltage power supply, a winding roller, a metal plate, an air inlet, a sliding rail, an air outlet and a closed outer cover. The needle-free electrode wire is connected with the liquid brushing groove in series and connected with the positive electrode of the direct-current high-voltage power source, the metal plate is arranged over the needle-free electrode wire and connected with the negative electrode of the direct-current high-voltage power source or grounded, and the air inlet can reciprocate on the sliding rail. The atmosphere-controllable needleless electrostatic spinning equipment is used for stabilizing jet flow, the fiber forming quality is improved, generated beads are reduced, it is ensured that fibers are uniform and fine, and the mechanical property and stability of the fibers are remarkably improved; one-step preparation of porous fibers and fibers needing secondary reaction modification is achieved, and the consistency of the fibers in the fiber membrane is improved.

The present invention discloses an independent injection control method and injection device for an arrayed electrohydrodynamic nozzle, belonging to the technical field of inkjet printing. The injection device includes an electrohydrodynamic nozzle, a high-voltage power supply, a laser module, and a control module. The electrohydrodynamic nozzle is composed of an ink cartridge, a nozzle plate, and a nozzle. The high-voltage power supply is used to provide high voltage electricity to form an electric field driving force to eject the solution. The laser module generates laser for regulating the temperature of the liquid meniscus of the solution. The control module controls the opening and closing of the high-voltage power supply and the laser. The present invention regulates the temperature of the liquid meniscus at the tip of the nozzle by using a laser-induced method, changes the surface tension coefficient of the solution at the tip of the liquid meniscus through the change of temperature, realizes the adjustment between the electric field force and the surface tension, and further controls the independent injection of each nozzle. In this way, the present invention can realize the independent injection of each nozzle without changing the nozzle structure, and has the advantages of simple nozzle structure and convenient maintenance.

The utility model belongs to the field of dust removal and environmental protection of a coal-fired power plant, and particularly relates to a pre-charged adjustable high-voltage wire inlet system of an electric precipitator, which comprises a pre-charged device and a wall bushing which are arranged at the front end of the electric precipitator, the pre-charged device is provided with a high-voltage power supply, and the high-voltage power supply is provided with a double-switch disconnecting link and is connected with an insulating pillar through a high-voltage lead. Every two adjacent insulation supporting columns are connected through a rigid material, and the last insulation supporting column is connected with a wall bushing on a wall plate through a high-voltage wire and then connected with a pre-charging device to conduct power supply. According to the utility model, one high-voltage power supply is used for supplying power to the pre-charging devices arranged on the two or more loudspeakers, each pre-charging device can be independently disconnected without influencing the normal operation of other pre-charging devices and an electric field under the condition that a main power supply is not cut off, and on the premise that the pre-charging devices normally operate the required high-voltage power supply, the pre-charging devices can be independently disconnected. The construction cost is greatly saved, and the market competitiveness is improved.

The invention discloses an intelligent monitoring system for high-voltage power supply equipment, which belongs to the technical field of power distribution equipment monitoring and comprises three-in-one monitoring equipment including a temperature measuring device, a leakage current monitoring device and an ultrahigh-frequency partial discharge monitoring device. And data is transmitted to the wireless receiving unit through ultra-narrow-band wireless communication, and is finally summarized to a background intelligent data analysis platform, so that real-time monitoring and efficient and accurate judgment of the running state of the high-voltage equipment are realized. The system has the advantages of being high in intelligent degree, convenient to install, low in power consumption and the like, solves the problems that a traditional monitoring device is difficult to supply power, complex in wiring, unstable in data transmission and the like, and is suitable for state sensing and health management of large-scale high-voltage power distribution equipment. By using the system, field detection can be reduced, a large amount of manpower and material resources can be saved for power enterprises, the power facility management efficiency can be improved, the maintenance management level is improved, and stable operation of a power grid is ensured.

The utility model relates to the technical field of automobile testing, in particular to a double-pulse automatic testing device which comprises a shell provided with a containing cavity, an opening is formed in the shell, and a cover plate capable of being opened and closed is arranged at the opening; a signal generator, a tested device and an oscilloscope which are electrically connected in sequence are arranged in the accommodating chamber; the door lock module is used for locking the cover plate when the cover plate is closed; the high-voltage control module is electrically connected with the high-voltage power supply, the high-voltage power supply end of the tested device, the door lock module and the output end of the signal generator, and is used for connecting the high-voltage power supply and the tested device when the door lock module is locked and disconnecting the high-voltage power supply and the tested device after a double-pulse signal is output; the discharging module is electrically connected with the high-voltage control module and the high-voltage power supply end of the tested device and is used for releasing the high-voltage power supply after the high-voltage power supply is disconnected; and the door lock module is electrically connected with the high-voltage power supply end of the tested device and is used for unlocking the cover plate after the high-voltage power supply is released. By adopting the device, the test safety can be improved.

The present invention discloses an electrostatic precipitation cathode system capable of collecting positively charged dust, which includes RS small barbed wires, dust collection cathode wires, and a cathode rapping device. The RS small barbed wires are distributed in all electric fields of the electrostatic precipitator and have barbs capable of tip discharge when the high-voltage power supply is energized. The dust collection cathode wires are only distributed in 1 to 3 electric fields near the air outlet of the electrostatic precipitator and can adsorb positively charged dust particles by using a negatively charged dust suction structure when the high-voltage power supply is energized. The cathode rapping device can regularly rap the dust collection cathode wires to remove positively charged dust particles, thereby effectively improving the electrostatic precipitation efficiency.

The utility model relates to the technical field of electric spark sources, in particular to a portable electric spark source which comprises an input power supply, a central control box, an upper computer and an exciter, and a source system is arranged in the central control box; the seismic source system comprises a voltage detection module, a high-voltage power supply module, an energy storage module and a high-voltage switch module. The input power supply is electrically connected with the high-voltage power supply module, the voltage detection module and the high-voltage switch module respectively; the high-voltage power supply module is electrically connected with the voltage detection module, the upper computer, the energy storage module and the high-voltage switch module, and the high-voltage switch module is electrically connected with the energy storage module and the exciter. According to the portable electric spark source, the high-voltage power supply and the high-voltage switch are integrated, so that the size and the weight of equipment are remarkably reduced, and the portability is improved.

The invention discloses a high-voltage power supply high-selection circuit and a control method thereof, the high-voltage power supply high-selection circuit comprises a floating power supply generation circuit, a high-voltage floating comparator circuit, inverters INV1-INV4, a high-voltage PMOS tube PDM5 and a high-voltage PMOS tube PDM6, the floating power supply generation circuit generates a floating high voltage HVDD and a floating low voltage HVSS, two inputs of the high-voltage floating comparator circuit are respectively connected with input signals V1 and V2, and the high-voltage floating comparator circuit is connected with the high-voltage PMOS tube PDM5 and the high-voltage PMOS tube PDM6. The inverters INV1-INV4 generate two inverted signals A and B according to an output signal of the high-voltage floating comparator circuit, a high-voltage power supply end of the high-voltage floating comparator circuit, a source electrode of the high-voltage PMOS tube PDM5 and a source electrode of the high-voltage PMOS tube PDM6D are connected with a floating high voltage HVDD, and a low-voltage power supply end of the high-voltage floating comparator circuit is connected with a floating low voltage HVSS. According to the invention, the high-voltage power supply high-selection circuit is realized.

The invention relates to a voltage output method and system based on a high-voltage power supply widening controller, and belongs to the technical field of high-voltage power supplies. The method comprises the following steps: acquiring a wide-range voltage parameter, and dividing a frequency control region and a pulse width modulation control region of a high-voltage power supply through an arbitration control algorithm to obtain switching judgment information of a power supply working region; constructing a working area switching logic according to the resistance-capacitance network, executing the working area switching logic through a frequency pulse correlation algorithm, coordinating the pulse width and the working frequency, and generating a double-modulation execution signal; a closed-loop negative feedback mechanism is established, and a wide-range overvoltage-free voltage regulation and control instruction is obtained by combining a proportional-integral compensation circuit with a resistance measurement full-right control working frequency and a pulse width; and broadening the output voltage range and inhibiting the overshoot voltage through power supply power driving, coordinating the working frequency and the pulse width in combination with the wide-range overvoltage-free voltage regulation and control instruction, and outputting the wide-range voltage of the high-voltage power supply.

The invention relates to the technical field of automobile control, and discloses a vehicle low-voltage power supply system which comprises a high-voltage power supply, a first voltage conversion module, a power regulation and control capacitor, a second voltage conversion module, a low-voltage energy storage module, a control module and a partial pressure load, and a set of complete power supply system is built. Wherein the power regulation and control capacitor is bidirectionally connected with the two low-voltage buses through the second voltage conversion module to realize bidirectional flow of energy. The instantaneous power impact can be effectively buffered, the voltage fluctuation of the system is reduced and the stability is improved by utilizing the high power density and the rapid charging and discharging capability of the power regulation and control capacitor. The invention further discloses a control method and device for the vehicle low-voltage power supply system and the vehicle.

The present invention discloses a mechanical-pneumatic double-vibration electrostatic precipitator, comprising a cathode system, an anode system, a high-voltage power supply, a shell, a mechanical vibrating device and a pneumatic vibrating device. The cathode system and the anode system are respectively distributed in the shell. When the high-voltage power supply is energized, on the one hand, the cathode system and the anode system can cooperate to form an electric field, and on the other hand, the cathode system can be used to ionize the air. The cathode system and the anode system can be mechanically vibrated and cleaned by a mechanical vibrating device arranged on one side. The pneumatic vibrating device can pneumatically vibrate and clean the cathode system and the anode system on the side facing away from the mechanical vibrating device. The dust removal effect is good, the space occupancy is low, and the service life is long.

The invention discloses an LDO (Low Dropout Regulator) circuit based on a level conversion and pre-adjustment module. The LDO circuit comprises a reference source, an error amplifier, a pre-adjustment module, a level conversion module, a power switch tube P1, a power circuit tube N1 and resistance feedback networks R1 and R2. The pre-adjustment module carries out voltage reduction processing on an input high-voltage power supply, and the level conversion module generates bias voltage according to an enable signal and the high-voltage power supply, controls a power switch and a switch in the operational amplifier, and ensures that the circuit is resistant to high voltage and extremely low in drain. The error amplifier adjusts the grid voltage of the power circuit according to the feedback and reference voltage difference value, and controls the current to stably output the voltage. And the resistance feedback network realizes closed-loop regulation of the output voltage. Under the condition that the LDO is enabled to be closed, the power tube can be ensured to be completely closed no matter the LDO is under the working voltage of 3V or 5V, so that the electric leakage condition of the LDO is greatly improved, and the LDO has the characteristic of low electric leakage.

The invention discloses a voltage and current synchronous measurement method for a high-voltage power supply of a fusion device, which is suitable for accurately sampling and monitoring voltage and current signals of each key node of the high-voltage power supply of the fusion device. According to the method, firstly, a resistance-capacitance voltage division technology is adopted, a front-end high-voltage attenuation network is constructed by utilizing high-precision resistors and capacitors, and stable voltage division and linear attenuation of high-voltage signals are achieved; then, electrical isolation is realized through a small-signal voltage and current transformer, and multi-channel synchronous acquisition of voltage and current signals is completed respectively. Then, the ADC module adopts two multi-channel AC sampling special electric energy metering chips to realize ten-channel synchronous acquisition of high voltage and current signals. And finally, the FPGA receives, processes and analyzes the acquired data in real time, and transmits a result to an upper computer monitoring platform. According to the method, the synchronism, the precision and the anti-interference performance of a fusion power supply high-voltage measurement system are remarkably improved, and reliable data support is provided for safe and stable operation of a fusion device.

The invention belongs to the technical field of ionic wind propellers, and particularly relates to a multi-stage ionic wind propelling device with a common electrode structure, which comprises a plurality of ionic wind generating units which are sequentially arranged along the airflow direction, each unit consists of a conductive support structure and an ionization needle tip on the conductive support structure, and the ionic wind generating units are used for ionizing air under the action of a high-voltage electric field; the multiple units are isolated from one another through the insulation supporting structures and are connected in series, the power supply access module alternately provides positive and negative high-voltage power supplies for all the units, all the conductive supporting structures sequentially serve as ionization electrodes and receiving electrodes in a multi-stage electric field, and the electrode sharing type continuous acceleration structure is achieved. An independent receiving end does not need to be arranged for each stage, the number of electrodes and supporting parts is remarkably reduced, the ion acceleration path is prolonged, the thrust density is improved, a frame-type or non-frame-type structure can be adopted for flexible construction according to requirements, and the advantages of being light in structure, high in thrust-weight ratio and high in expansibility are achieved; the invention is suitable for the fields of micro aircrafts and directional air supply.

The invention discloses a server power supply system, a server, a topological structure generation method and a storage medium, and relates to the technical field of power electronics. According to the invention, a high-voltage centralized conversion-medium and low-voltage distributed distribution two-stage architecture and a physical isolation design of the first direct-current bus and the second direct-current bus are adopted, and an adaptive mounting platform is provided for load nodes such as a super-capacitor node and an energy storage node depending on the second direct-current bus; the mounting number of the load nodes can be determined based on the power required by the load nodes and the voltage and through-flow level of the second direct current bus, and high-voltage power supply conversion and power supply of the load nodes are separated, so that physical isolation of high-voltage direct current of the first direct current bus and low-voltage direct current of the second direct current bus is realized. The high-voltage direct current input is ensured to be safely, efficiently and stably distributed to each load node in the server after being converted. The problems of potential safety hazard and reliability risk caused by direct access of the high-voltage direct current to the load node, poor mounting adaptability of the load node and the like in the prior art are solved.

The invention relates to the technical field of electrostatic dust collection and discloses an accurate frequency adjustment method for an intelligent frequency modulation high-voltage power supply of an electrostatic dust collector. The method comprises the steps of collecting voltage signals with frequency fluctuation in operation of a high-voltage power supply to form a voltage sequence; dividing period segments by using wave crest distribution in the voltage sequence, and clustering to obtain adjustment subsequences; obtaining a trend fluctuation index based on local signal change trend fluctuation and signal differences of the adjustment subsequences, and obtaining an amplitude drop difference and an amplitude interval difference according to an amplitude change trend difference and an amplitude bit sequence change trend difference; obtaining a period stability coefficient by combining the difference, the average condition of the trend fluctuation index and the average condition of the sub-sequence similarity; constructing a Hankel matrix and performing singular value decomposition, and obtaining a main component proportion and a difference index based on a singular value condition; and according to the Hankel matrix line data correlation, the period stability coefficient, the main component proportion and the difference index, obtaining a signal stability index, and according to the signal stability index, accurately adjusting the high-voltage power supply frequency.

The invention provides a method for preparing nanofiber doped with a large-particle antibacterial agent by a needleless electrostatic spinning device. The method comprises the following steps: adding a high-molecular polymer and a large-particle antibacterial substance into an organic solvent to prepare a spinning solution; electrospinning nanofibers doped with a large-particle antibacterial agent on the surface of the fabric through a needleless electrostatic spinning device; the needleless electrostatic spinning device comprises an electrode wire, a liquid brushing tank, a direct-current high-voltage power supply, a winding roller, a metal plate, a liquid storage bottle and a movable spraying brush. The electrode wire is used for replacing a needle type electrode, production efficiency is improved, and needle blockage is avoided; the liquid storage bottle reduces volatilization of the spinning liquid, the spinning liquid is continuously stirred and pumped to the liquid brushing tank to be brushed on the electrode wires, the antibacterial agent is prevented from being deposited, and the antibacterial agent is evenly distributed on the nanofibers; an air injection brush head is installed to prevent large particles from depositing on the electrode wires; according to the method, the selection limitation on the high-molecular polymer and the antibacterial agent is small, and the prepared antibacterial fabric has lasting antibacterial property.

The invention provides a radiation detection device and method for measuring ultra-wide-range gamma rays, and relates to the technical field of radiation detection.The radiation detection device comprises a detection assembly, a radiation shielding assembly and a signal processing assembly, and the signal processing assembly is located in the radiation shielding assembly; the detection assembly comprises three GM counting tubes with different measuring ranges and an acquisition circuit, and the acquisition circuit is used for converting signals output by the GM counting tubes into voltage counting signals; the signal processing assembly comprises a high-voltage control circuit, a power supply processing circuit, a pre-amplification circuit and a processor, the power supply processing circuit is used for converting a direct-current power supply signal and then transmitting the converted direct-current power supply signal to the high-voltage control circuit and the acquisition circuit, and the high-voltage control circuit is used for outputting a high-voltage power supply signal to each GM counting tube; the pre-amplification circuit is used for filtering and amplifying the voltage counting signals, and the processor is used for determining a target radiation dose rate according to the processed voltage signals. The radiation detection device provided by the invention has a relatively wide measuring range and relatively high measurement precision.

An enhanced flash evaporation / electrospinning composite spinning equipment includes a flash spinning equipment, an electrospinning equipment, and a grounded receiving conveyor belt; the flash spinning equipment includes a flash spinning spinneret unit, the flash spinning spinneret unit includes a first spinneret, and the first spinneret is grounded; the electrospinning equipment includes a high-voltage power supply and an electrospinning spinneret unit, the electrospinning spinneret unit includes a second spinneret, and the second spinneret is connected to the high-voltage power supply; the first spinneret and the second spinneret are both located above the receiving conveyor belt at opposite positions with a distance of D, and the value range of D is 15-40 cm. The enhanced flash evaporation / electrospinning composite spinning equipment has a simple structure, and can prepare products that are not easy to delaminate, and excellent in waterproof performance and air permeability.

The invention relates to the technical field of high-frequency and high-voltage power supplies, and discloses a dielectric barrier discharge load high-frequency and high-voltage power supply and control system, which comprises a power supply circuit, a Buck circuit and a series resonance inverter circuit, the control system comprises a frequency sweep starting control module, a zero-crossing phase-locked frequency tracking control module and a fuzzy PI control module. The system stability and the power supply dynamic performance can be improved.