33results about How to "No external power supply required" patented technology

The invention discloses a pulse output type rotation speed sensor, which comprises a gear disc installed on a rotation shaft, a magnetic pulse sensing permanent magnet, a soft magnet, an induction coil assembly, and a built-in signal reshaping circuit. The pulse output type rotation speed sensor disclosed by the invention can directly output large-amplitude pulse signals and has very strong anti-interference performance. The pulse output type rotation speed sensor adopts a passive designing technology and does not need external power supply, has the advantages of high intensity of output signals, strong anti-interference capability, no need of power supply, convenience in installation and use, no mechanical wear, long service life, and no need of control and provision of any excitation circuit, and can be used in smog, oil gas, hydrosphere and other environments.

The invention discloses a vortex street effect-based flow sensing and energy collecting device and method, and the method comprises the steps that: a solid friction medium periodically contacts and is separated from a first electrode layer and a second electrode layer at the two sides of a substrate in sequence under the action of a vortex street effect when a fluid to be measured flows through a generating body, under the coupling effect of the triboelectrification effect and electrostatic induction, a friction electric signal equal to the vortex street frequency is generated between the first electrode layer and the second electrode layer, and the flow of the fluid to be measured can be obtained by measuring the frequency of the electric signal. The flow sensing and energy collecting device based on the vortex street effect and the method thereof solve the problem that a traditional vortex street flowmeter is prone to being interfered by environmental mechanical vibration, and have the advantages of being low in cost, not prone to being affected by the environment, free of external power source for energy supply and the like. The device and the method have important application prospects in the fields of thermal engineering, energy transportation, environment monitoring, medical detection and the like.

The invention discloses a magnetic crane, which comprises a body, a handle and a control handle, wherein the handle is positioned on the upper end of the body, the control handle is positioned on one side of the body, the control handle is connected with a permanent magnet in the body through a rotating shaft, the permanent magnet is made from a high-performance rare earth permanent magnet material, and the high-performance rare earth permanent magnet material is a neodymium-iron-boron permanent magnet material which comprises the following main components in percentage by mass: 30-35% of neodymium, 20-25% of boron, 25-30% of iron, 8-10% of copper, 5-8% of aluminum and 2-6% of cobalt. Through the mode, the high-performance permanent magnet material is adopted, a magnetic force line is changed by overturning the handle, so that the magnetic crane is in working or closing state, external power supply is not required, and the magnetic crane is safe and energy-saving.

The invention discloses a fireless field food heating system based on solar catalytic oxidation, and relates to the technical field of solar application. The fireless field food heating system comprises a pot body, a methanol-air spray tank, a heat exchanger and a photovoltaic module; the pot body comprises a heating cavity used for containing food, an annular flue arranged on the outer side of the heating cavity, a catalysis chamber and a spraying chamber, the catalysis chamber and the spraying chamber are arranged between the heating cavity and the annular flue, an opening of the heating cavity faces upwards, the spraying chamber is located above the catalysis chamber, and a fan is arranged in the spraying chamber; the methanol-air spray tank is arranged on the outer side of the heating cavity, and an outlet of the methanol-air spray tank sequentially communicate with the spraying chamber, the catalysis chamber and the annular flue; the heat exchanger is arranged below the heating cavity and on the side far away from the methanol-air spray tank; the photovoltaic module is arranged on the outer side of the annular flue, the photovoltaic module can store electric energy and assist the heat exchanger in heating food, and the photovoltaic module can further provide the electric energy for the fan. The performance of the field food heating system is improved.

A self-locking human body electrostatic discharge alarm of a sidewalk gate comprises an electrostatic conduction ball assembly, a connector, a top cover, a handrail, an inner pipe, a base and a lengthening bar. A pressing rotating device is arranged between the inner pipe and the base. By means of the pressing rotating device, it is guaranteed that when personnel press down the electrostatic conduction ball assembly, the personnel can push the handrail and the lengthening bar to rotate; and when the electrostatic conduction ball assembly is not pressed down, the handrail and the lengthening bar are locked. In the base, an elastic return device is arranged between the inner pipe and the top cover. By means of the elastic return device, after personnel pass, the inner pipe, the handrail andthe lengthening bar are driven to reset. The whole function is automatically achieved completely through a mechanical structure. The self-locking human body electrostatic discharge alarm can be arranged at an entrance of an explosion area of oil gas and the like, it can be ensured that human body static electricity of entering personnel can be eliminated 100%, and accident potentials of electrostatic ignition are eliminated.

The invention relates to a self-locking electrostatic discharge alarm instrument for human body. The alarm instrument comprises an electrostatic conducting ball assembly, a first pipe fitting, a shellbody, a second pipe fitting, a bending tube, a linear bearing and a self-locking assembly, and the self-locking assembly comprises a tension spring mounting bracket, a bearing mounting bracket, a V-shaped marble, a deep-groove ball bearing and a tension spring. At ordinary times, the bending tube is locked and can not be accessed by a personnel, the personnel presses the electrostatic conductingball assembly with a stroke of 27 mm, the bending tube is unlocked, and the personnel can push the bending tube to enter. After the personnel enters, the bending tube automatically rebounds back and is locked; the bending tube can only be pushed away after the electrostatic conducting ball assembly is pressed again to unlock the bending tube; and rebounding and locking of the bending tube can be achieved automatically, the alarm instrument functionally completely meets the safety requirements that the personnel can only pass through after discharging static electricity, and can be installed atentrances of explosive areas such as oil and gas, that the entering personnel can eliminate 100% of static electricity of the human body can be ensured, and the hidden danger of accidents caused by static electricity ignition is eliminated.

The invention belongs to the anti-electricity anti-stealing technological field and discloses an anti-electricity larceny remote online monitoring system. The system comprises a fiber grating currentsensor, a fiber grating wavelength demodulation module, a smart electric meter, a fiber grating magnetic field sensor, a power source module, a main control module, a wireless communication module anda main station; the fiber grating wavelength demodulation module and the smart electric meter are both connected with the main control module; the fiber grating current sensor and the fiber grating magnetic field sensor are both connected with the fiber grating wavelength demodulation module through a single-mode fiber; the wireless communication module is applied to wireless communication between the main control module and the main station; and the power source module is used for system power supply. The anti-electricity larceny remote online monitoring system provided by the invention hasthe advantages of small size, strong anti-interference capacity and remote online monitoring.

The invention relates to the technical field of insecticidal lamps, and provides an intelligent solar insecticidal lamp. The intelligent solar insecticidal lamp comprises a trapping mechanism, an energy supply mechanism and an intelligent control mechanism; the energy supply mechanism comprises a trapping cage, a trap lamp and an insect-catching color plate, the trap lamp is arranged on the inner top side of the trapping cage, and the insect-catching color plate is detachably arranged in the trapping cage; the energy supply mechanism comprises a solar cell panel and a storage battery, the solar cell panel is arranged on the outer top side of the trapping cage and connected with the storage battery, and the storage battery is connected with the trap lamp; the intelligent control mechanism comprises a control module, a communication module and a mobile control terminal, the control module is connected with the trap lamp and the communication module and used for collecting and transmitting the operation state of the trap lamp, and the mobile control terminal is connected with the communication module and used for sending an instruction for changing operation parameters of the trap lamp to the control module. Working modes are increased, meanwhile, insect catching efficiency is improved, external power supply is not needed, operation is easy, flexibility and portability are achieved, cost is low, and the intelligent solar insecticidal lamp can adapt to various different agricultural production scenes.

The invention relates to a design method and circuit for a serial port multi-stage charging and discharging power supply, and the method and circuit obtain a power supply for instantaneous large-current power supply through the design of taking power from a micro-current signal source of a serial port to charge a special multistage charging and discharging circuit, and solve a self-power-supply problem based on the serial port on the premise that the signal communication quality is not influenced. The micro-signal source comprises a TxD terminal which supports a three-wire system and takes power from an RS232 port. A charging power supply is obtained through bidirectional rectification filtering and charge pump reverse polarity; the first-stage power supply is a primary power supply, the second-stage power supply is a backup power supply; a backup power supply is used as a main power supply support; under the condition that the power taking current does not exceed 5mA, the method and the circuit meet the extreme power supply requirements under the following conditions: the Bluetooth equipment is supported to perform + 8dB radio emission, the instantaneous current is 20mA, the communication distance reaches 300m, the data is sent once every four seconds, and the data length is supported to be 255 bytes. In addition, as an option, a long-service-life battery micro-current is adopted for power supply, and display and connector assembly effectiveness monitoring which can be as long as 9.5 years in a storage state can be provided.