12results about How to "Increase the output voltage" patented technology

The invention discloses a high-power-supply-rejection-ratio band-gap reference circuit with base current correction and high-order temperature compensation, which comprises a pre-voltage-stabilizing circuit module used for generating and outputting internal power supply voltage according to external power supply voltage, the internal power supply voltage is supplied to the band-gap reference core circuit module so as to isolate transmission of power supply noise to reference output; the high-order temperature compensation circuit module is used for generating nonlinear compensation current according to the bias voltage; the band-gap reference core circuit module is used for generating current in direct proportion to absolute temperature, reference voltage and reference output voltage based on internal power supply voltage and feeding back the reference voltage to the pre-voltage-stabilizing circuit module to serve as bias reference; and the base current correction circuit module is used for sampling the base current of the bipolar transistor in the band-gap reference core circuit module. On the premise that the circuit structure and the power consumption are reasonable, the temperature drift of the reference voltage is reduced, and the power supply suppression capability is improved.

The invention relates to a signal control circuit based on a transverse tandem photoelectric detection unit structure and a control method, and belongs to the field of photoelectric detection and control. The circuit comprises a transverse tandem detection unit structure and a post-stage signal processing circuit, wherein the post-stage signal processing circuit comprises a plurality of resistor units, a bipolar transistor and an MOS (Metal Oxide Semiconductor) tube; according to the method, an optical signal is converted into an electric signal through a transverse tandem type detection unit structure, and charge release and voltage signal output processing are carried out through a post-stage signal processing circuit. When light enters the transverse tandem type detection unit structure, the output tube is switched on; when no photo-generated current exists, the output tube is switched off; and the output tube can output a voltage control signal meeting the amplitude requirement when being switched on or switched off so as to control the working state of a rear-end circuit. By combining the photoelectric detection unit and the signal processing circuit, monolithic integration and process fusion of the silicon-on-insulator process are realized, the parasitic effect between elements can be effectively reduced, and the interconnection scheme of discrete devices is upgraded.

The application discloses a thermoelectric pile structure for calibrating a far ultraviolet ultraviolet detector based on MEMS, which comprises a silicon substrate, a support layer, an absorption layer, a thermocouple pair, aluminum wires, aluminum electrodes and a single crystal silicon material structure on the silicon substrate. The double-layer thermocouple stacking structure is adopted to improve the device duty ratio, more thermocouple pairs can be laid in the case of keeping the size of the one-layer structure unchanged, and the response rate of the detector is improved. The circular structure conforms to the distribution trend that the temperature is radially diffused from the center of the absorption layer to the periphery in a decreasing manner, the hot end of the thermocouple pair can be closer to the area with higher temperature, the temperature of the hot end of the thermocouple pair is more uniform, and the response rate of the detector is improved. The radiant energy of the far ultraviolet ultraviolet radiation source is converted into an output thermoelectric electromotive force, a mathematical model of Fourier's law and the Seebeck effect is established for calculation, and the heat flux density of the far ultraviolet ultraviolet radiation source is measured.

The invention belongs to the technical field of flexible piezoelectric sensors, and relates to a carbon felt-hydrogel composite piezoelectric sensor and a preparation method thereof. The sensor comprises a piezoelectric sensing layer, a cross-scale dual-network hydrogel layer, an electrode layer, a leading-out wire and a packaging layer, the two cross-scale dual-network hydrogel layers are arranged on the upper side and the lower side of the piezoelectric sensing layer in a stacked mode to form a sandwich structure. The cross-scale dual-network hydrogel layer is an elastic hydrogel material formed by compounding a carbon fiber felt skeleton and a molecular-level network polymer, and the molecular-level network polymer penetrates through the interior and the surface of the carbon fiber felt skeleton and is formed by cross-linking and curing; the number of the electrode layers is two, and the two electrode layers are arranged on the outer sides of the two cross-scale dual-network hydrogel layers in a stacked mode respectively. The lead-out wire is electrically connected with the electrode layer; the packaging layer wraps the outer side of the electrode layer. According to the sensor, the mechanical property, the conductivity and the stability of the flexible piezoelectric sensor can be improved.

The invention discloses a flexible methanol fuel cell and a humanoid robot power supply system, and relates to the technical field of methanol power generation, the flexible methanol fuel cell comprises a flexible bag body, the two ends of the flexible bag body are provided with a liquid inlet and a liquid outlet, and the side surface is provided with a mounting opening; the membrane electrode is sealed in the mounting opening; the anode diffusion layer and the cathode diffusion layer are respectively fixed on the anode side and the cathode side of the membrane electrode, and fine wire meshes are fixed on the anode diffusion layer and the cathode diffusion layer. A humanoid robot power supply system comprises a flexible methanol fuel cell, a DMFC energy management system and an energy storage cell, and the flexible methanol fuel cell serves as a power generation unit and is integrally distributed on the outer surface of a robot. According to the flexible methanol fuel cell disclosed by the invention, the whole cell body has good bending, twisting and tensile elasticity, can adapt to various irregular surfaces and dynamic deformation scenes, and is light in weight and thin in thickness. The flexible methanol fuel cell is used as a power generation skin to be integrated on the robot, the mass energy density is improved, and the endurance working time is prolonged.

The present application belongs to the technical field of electromagnetic detection, and relates to an electromagnetic detection multi-level current emission system and control method for highland environment. The control method comprises calculating a load model impedance; analyzing an MFPWM control process to determine optimal control parameters for an emission spectrum intensity maximization optimization target; and MFPWM optimization control: by adjusting the frequency and amplitude of each modulation signal component, directional power distribution, independent regulation and control of each frequency component are realized. The present application adopts a multi-level topology structure, which realizes high output voltage while reducing switching voltage stress, avoids the cost increase and high system complexity caused by the dependence of traditional H-bridge inverters on high power supply voltage; in combination with multi-frequency pulse width modulation optimization control, the spectrum energy can be flexibly configured, the high-frequency component of the emission signal is enhanced, and the spectrum energy utilization rate and signal-to-noise ratio are improved; the high dynamic range ground impedance changes can be accurately tracked, and the needs of deep geological electromagnetic detection in extreme environments are met.

The invention provides a compact broadband frequency insensitive rectifier for collecting electromagnetic energy in an environment, and aims to face the field of wireless power supply Internet of Things equipment. The invention finds that the double-branch LC series-parallel structure has a key characteristic that the impedance is insensitive to frequency change. By fully utilizing the characteristic, a simple matching network is designed to realize broadband performance. Through a simulation and measurement combined method, the operation effectiveness of the proposed topological structure is verified, and the design of the broadband rectification circuit is successfully realized. The rectification circuits of three different matching networks are compared, and the optimal circuit is determined. Under the input of 8 dBm and the load of 1.2 k omega, the peak power conversion efficiency of the rectifier reaches 74.75%. And the efficiency is kept above 60% at the relative bandwidth of 81.1%. Under the load condition of 0.9 k omega, the relative bandwidth with the efficiency of more than 60% is kept at 81.1%, and the bandwidth with the efficiency of more than 50% is expanded to 100%.

The application provides an organic lithium-iodine battery based on a two-electron transfer mechanism and a manufacturing method and application thereof. The organic lithium-iodine battery comprises a positive electrode, a negative electrode and an organic electrolyte. The positive electrode active material used by the positive electrode comprises iodide and / or bromide, and the organic electrolyte comprises an organic solvent containing a chlorine-containing additive. The organic lithium-iodine battery uses iodide as the positive electrode active material, thereby avoiding the instability and safety hazards existing in the current I2 positive electrode. The organic solvent containing the chlorine-containing additive is used as the organic electrolyte, and excellent electrochemical performance is provided through a two-electron conversion mode. Compared with a traditional lithium-iodine battery, the organic lithium-iodine battery has higher capacity, energy density and higher output voltage. In addition, the organic lithium-iodine battery has excellent low-temperature insensitivity. At-25 DEG C, the battery realizes 2500 cycles at the cost of 20% capacity decay, and can still work stably at a low temperature of-30 DEG C.

This invention provides a ceramic proton exchange membrane for microbial fuel cells and its preparation method, comprising the following steps: mixing clay, an inorganic modifier, and an organic modifier to obtain a solid powder; the inorganic modifier is alumina and silicon dioxide, and the organic modifier is selected from one or more of wheat flour, biochar powder, straw powder, and bamboo powder; the solid powder is ball-milled, granulated, pressed into sheets, and calcined to obtain the ceramic proton exchange membrane. This invention addresses the problems of poor mass transfer performance and low power generation performance of traditional pure clay ceramic membranes. Using clay as the matrix material, and through specific inorganic and organic modifiers, the pore structure of the material is adjusted. A novel ceramic proton exchange membrane is then prepared through ball milling, granulation, pressing, and calcination. This membrane has low manufacturing cost, good proton transport efficiency, and extremely low internal resistance. When applied to microbial fuel cells, it can achieve higher output voltage and more stable power generation performance.

The application relates to a dual-purpose self-powered wind turbine blade monitoring device in the field of new energy sources. The device is mainly composed of a stator, a rotating disc, a half shaft, a coil, a rolling body, a framework, a driver and a circuit board. Inertial blocks are arranged on the outer edge of the stator. The stator is provided with a transducing cavity, axially communicating holes and an excitation cavity. The framework is composed of a frame cylinder and the end plates. The stator is sleeved on the half shaft, the framework is arranged in the transducing cavity, and the circuit board is arranged in the excitation cavity. The coil is arranged on the frame cylinder, and the rolling body is arranged in the cylinder cavity. The rolling body is a permanent magnet. When the rolling body is a cylinder, the axis of the rolling body is perpendicular to the axis of the coil. The drivers are evenly distributed on the rotating disc in the circumferential direction. The drivers are permanent magnets or are made of ferromagnetic materials. The rotating disc is fixed on the half shaft, and the drivers are oppositely arranged with the rolling body. When the half shaft rotates, the drivers rotate relative to the rolling body and apply a torque to the rolling body. The rolling body rolls, and the magnetic poles and the magnetic field strength penetrating through the coil of the rolling body alternately change. The coil cuts the magnetic lines to generate electricity.

The invention discloses an MEMS thermopile infrared sensor and a preparation method thereof. Comprising a substrate, a first supporting film, a second supporting film, a thermopile layer, a dielectric layer, a reflecting layer and a passivation layer. The thermopile layer is formed by connecting a plurality of double-layer thermocouple pairs in series, each double-layer thermocouple pair comprises a first thermocouple P-type polycrystalline silicon, a silicon oxide insulating layer and a second thermocouple metal Al, and hot ends are gathered in the middle of the surface of the chip and are arranged in a radial mode. The thickness difference of dielectric layers at the hot end and the cold end of the thermocouple strip is regulated and controlled, the dielectric layer at the hot end is enlarged, the dielectric layer at the cold end is kept thin to increase the equivalent thermal resistance of the hot end, the aluminum reflecting layer is deposited at the cold end to reduce the absorption of infrared heat by the cold end, and the temperature difference between the hot end and the cold end is enhanced through combined action. And thus, the output voltage of the MEMS thermopile infrared sensor is improved.

The invention relates to the technical field of fuel cells, and provides a gas diffusion layer and a preparation method and application thereof. The gas diffusion layer comprises a substrate layer and a microporous layer attached to the surface of one side of the substrate layer, the substrate layer is provided with stacked carbon fibers, substrate layer pores are formed among the carbon fibers, the microporous layer comprises stacked conductive particles, at least part of the conductive particles permeate into the substrate layer, and the microporous layer comprises first pores and second pores; wherein the aperture of the first pores is R1, R1 is larger than or equal to 5 microns and smaller than or equal to 10 microns, the aperture of the second pores is R2, R2 is larger than or equal to 1 microns and smaller than 5 microns, and the pore area rate of the first pores is 25%-35%. According to the gas diffusion layer, through the synergistic effect of the multi-stage distribution pores of the pore size, the air permeability is effectively improved while the performance is improved, so that the gas diffusion layer has good drainage performance and air permeability.