13results about How to "Reduce size and weight" patented technology

This invention provides a dual U-shaped coupling mechanism and an underwater constant-voltage wireless charging system and parameter design method. By optimizing the coil structure and parameter design method, it has strong applicability to underwater enclosed wireless charging, can significantly suppress mutual inductance drop, and maintain a high mutual inductance level to reduce seawater eddy current loss. It achieves constant voltage output for loads with different voltage requirements and power levels within a large angular offset range, improving the universality and adaptability of the underwater wireless charging system for underwater electromechanical equipment with different power requirements. At the same time, it takes into account the small size and weight of the system, which is more conducive to realizing the unmanned operation of the underwater wireless charging system.

The invention discloses a single-layer Compton camera system and an imaging method, and relates to the technical field of nuclear radiation imaging. The system comprises a single-plane pixel type gamma ray detector used for collecting gamma ray interaction event data, including time information and energy information of each interaction and two-dimensional position information in a detector plane, and forming pixel counting distribution; the shielding structure is arranged on one side of the plane of the detector, is located in a local area of the detector and is used for enabling pixel counting distribution to generate a local counting missing feature when gamma rays are incident from one side where the shielding structure is located; and the judging and imaging module is used for judging a gamma ray incident side based on the local counting missing feature and executing Compton imaging reconstruction in a corresponding hemispherical view field range according to the judged incident side. According to the invention, partitioned omnidirectional imaging can be carried out on the radioactive source under the condition that a detector does not need to act on depth information, and meanwhile, generation of mirror image artifacts is avoided.

The utility model provides a kind of UL off-grid inverter, belong to inverter technical field, it includes, DC / DC step-up and step-down circuit, for completing battery step-up and step-down, voltage equalizing circuit, for ensuring that two-phase voltage amplitude of inverter is symmetrical, output zero line is taken to DC bus midpoint, two-phase three-level inverter circuit, for output specified AC voltage, by DC / DC step-up and step-down circuit and voltage equalizing circuit cooperation, make DC input first through high-frequency isolation step-up and step-down, positive and negative bus keep symmetry, common-mode noise is greatly reduced, electromagnetic compatibility is better, two-phase inverter bridge and LC filter combination after output voltage harmonic is extremely low, power quality meets UL off-grid requirement, L1 and L2 end with same neutral point N as reference, can software setting zero degree cophasal parallel output 120V large current, or 180 ° split-phase output 240V, hardware does not need additional transformer or switch, volume weight reduces, cost drops accordingly.

This utility model relates to the field of oil detection technology, specifically to a comprehensive oil monitoring device. The comprehensive oil monitoring device includes a detection module for detecting the viscosity, water content, contamination level, and ferrography of the oil. The detection module comprises the following components installed in sequence: an online oil inlet, a heat dissipation assembly, a solenoid valve, a wear sensor (ferrography analysis), a defoaming assembly, a viscosity / moisture detection assembly, a contamination detection assembly, and an oil outlet. The heat dissipation assembly and the solenoid valve are connected to the offline oil inlet via a switching device. This utility model can quickly and automatically complete the detection of four parameters: oil viscosity, water content, contamination, and ferrography, and can conveniently switch between online and offline modes.

The invention provides a negative logic UC3901 isolation control circuit and method based on a phase-shifted full-bridge converter. The circuit is characterized by comprising a full-bridge inverter, a power transformer, a current doubler rectifier, a voltage and current sampling circuit, a voltage loop compensation network, a current loop compensation network, a magnetic isolation circuit, a main control circuit and a driving circuit, the full-bridge inverter, the power transformer and the current doubler rectifier form a power circuit of the converter, and the rest parts form a control circuit; the magnetic isolation circuit comprises a UC3901 chopping chip, an isolation transformer and a rectifier filter, and the UC3901 chip is used for chopping an analog control signal Vcoms of over 0.45 V, so that the analog control signal Vcoms becomes an alternating current signal, and magnetic isolation transmission of the analog signal is realized. A conventional magnetic isolation drive circuit is replaced by the magnetic isolation circuit, the size and the weight of the circuit are reduced, and meanwhile a novel magnetic isolation mode is provided.

The invention discloses a radar beam compensation method and device based on motion feedforward and a detection tracking system, and the method comprises the steps: enabling the azimuth rotation of a rotary table to serve as a known and measurable input disturbance through introducing a real-time beam phase compensation mechanism based on rotary table motion information feedforward; reverse compensation is actively carried out on radar beams in an electronic mode in a feed-forward mode, so that stable pointing of the radar beams to a target in an inertial space is ensured in the whole process of movement of a rotary table, and finally it is ensured that target track information is not lost when the radar guides an optical camera to search the target.

The invention relates to the field of separation and animal and plant material essence extraction, and provides a device and a method for extracting animal and plant essence. The device comprises a solid-state semiconductor microwave source, a gallium nitride power amplifier, a combiner, a waveguide, a cooling system, a heating cavity, a collector, a vacuum system, a temperature and vacuum degree control unit and an impedance dynamic matching unit. The microwave source generates microwaves with specific frequency through crystal oscillation and distributes the microwaves to the gallium nitride power amplifier at the rear end; the power amplifier amplifies the received microwaves as required, and operates in a single-path or combined-path manner according to the load condition; the combiner modulates and combines the enhanced single-path or multi-path microwave signals; the waveguide receives the modulated and combined microwave signals and transmits the microwave signals to the heating cavity; materials are heated and vaporized at low temperature in the heating cavity, and are collected and cooled by the collector. According to the device, the essence element extraction efficiency is improved by 30-40%, the service life is prolonged, the size is reduced, and the environment adaptability is high.

This invention discloses a stripe projection 3D imaging system based on a Micro-LED array. Its 3D information acquisition module consists of an integrated packaged Micro-LED driver board, a Micro-LED array, a micro-projection module, and a CCD camera. The 3D reconstruction module utilizes a computer. The micro-projection module is equipped with a plano-convex lens and a mechanical focusing damping structure, and is separately arranged in the front and rear optical paths of the Micro-LED array. The system's workflow is as follows: the driver board reads pre-stored stripe pattern data and timing-controls the Micro-LED array to output coded structured light stripes; the focusing structure adjusts the object distance in the optical path, focusing and scaling the stripes before projecting them onto the surface of the object being measured; the CCD camera simultaneously acquires a sequence of deformed images modulated by the object's shape and transmits it to the computer; the computer combines a multi-step phase-shifting algorithm and Gray code rules to complete phase calculation and unfolding, and, combined with a preset phase-height mapping relationship, reconstructs the 3D shape and point cloud data of the object being measured. This invention enables low-cost, miniaturized, and high-performance 3D shape measurement.

The invention provides a six-degree-of-freedom measurement assembly and method for a load seat in a photoelectric stabilized platform, the six-degree-of-freedom measurement assembly comprises an outer frame, a flexible supporting piece and an optical load which are sequentially connected from outside to inside, the outer frame is provided with a plurality of displacement sensors, and each displacement sensor comprises a differential probe and a signal resolving circuit which are connected with each other. The optical load is provided with a plurality of measured target blocks, the measured target blocks are arranged among the differential probes, and the signal resolving circuit outputs excitation to the differential probes and collects signal changes of the differential probes at the same time; when the posture of the optical load is changed, the position of the measured target block is changed relative to the differential probe, so that the output signal of the differential probe is changed, the signal resolving circuit collects the changed output signal of the differential probe, and the distance change condition of the measured target block relative to the differential probe is resolved. According to measurement values of the displacement sensors distributed at different positions, a decoupling calculation equation is given in combination with a measurement method, and six-degree-of-freedom attitude information of the optical load can be calculated.

This invention specifically relates to a gas sampling device for a nuclear sampling system, comprising a sampling device, a vapor-liquid separation device, an online gas measurement device, and an automatic nitrogen purging device. The vapor-liquid separation device includes a vapor-liquid separator, an exhaust gas discharge pipeline, and an automatic waste liquid discharge pipeline. The sampling device includes multiple sampling pipelines, each connected to the vapor-liquid separator at its port and connected to the inlet of the online gas measurement device via an instrument measurement bypass pipeline. The outlet of the online gas measurement device is connected to the exhaust gas discharge pipeline via an instrument measurement gas outlet pipeline. Each sampling pipeline, each instrument measurement bypass pipeline, each instrument measurement gas outlet pipeline, each exhaust gas discharge pipeline, each automatic waste liquid discharge pipeline, and each nitrogen purging pipeline is equipped with an isolation valve. The nuclear sampling system gas sampling device of this invention enables simultaneous multi-point purging and sampling, automatic hydrophobication of gas samples, real-time online measurement of gas content, and automatic nitrogen backpurging.

The utility model discloses an anti-unbalance loading three-section lifting column structure with double-screw synchronous thrust, and relates to the technical field of mechanical transmission and control. According to the utility model, the power of the motor is transmitted to the reduction gearbox, and after speed reduction and torque increase, the power is transmitted to the gearbox through the transmission gear set to drive the left-handed ball screw and the right-handed ball screw which are horizontally parallel to each other to rotate synchronously. The ejector rod is in threaded connection with the outer wall of the right-handed rotation ball screw, the screw rods rotate to enable the ejector rod to do linear motion, the two screw rods synchronously and reversely rotate to achieve simultaneous lifting and load pushing or pulling on the two sides, compared with a screw rod and chain structure, the double-screw-rod structure is free of chains, the gap problem caused by chain abrasion is avoided, stable operation of the lifting column can be guaranteed, and the service life of the lifting column is prolonged. And the cargo falling risk is reduced. Meanwhile, the design of a hollow lead screw is abandoned, the two solid lead screws are adopted, the strength is higher, the size and weight are smaller, the transmission efficiency is higher, continuous work can be achieved in an automatic production line, and the production efficiency is improved.

The invention relates to a control method of a power-down holding circuit for high-precision voltage conversion. The power-down holding circuit comprises a direct-current path circuit, a voltage switching circuit and a BOOST circuit, the voltage switching circuit comprises an electronic switch and a voltage sampling circuit which are electrically connected; the direct-current path circuit, the BOOST circuit and the voltage sampling circuit are electrically connected with an input voltage respectively; the input end of the electronic switch is electrically connected with the voltage sampling circuit and the BOOST circuit respectively; the DC path circuit and the output end of the electronic switch are electrically connected with the DC / DC power supply respectively; the BOOST circuit is electrically connected with the electronic switch; the device is reasonable in design, compact in structure and convenient to use.

The fluid oscillator is applied to the control method of high-load compressor corner area flow separation, and the structure of the fluid oscillator comprises an air inlet, a porous material, an intermediate transition section, a micro controllable valve, an inlet and an outlet, the air inlet is adjacent to the pressure surface side of the compressor blade, the porous material is connected with the air inlet, one end of the intermediate transition section is connected with the air inlet, the other end of the intermediate transition section is connected with the micro controllable valve, the micro controllable valve is connected with the inlet, the inlet is connected with the outlet, and the outlet is located on the end wall near the compressor cascade corner area. Compared with the traditional technology, the application does not need an external air source, has the advantages of simple structure, small volume and weight, long-term work reliability and strong engineering practicability. Through the method, the flow separation near the compressor corner area can be effectively inhibited, the single-stage compressor can obtain a higher pressure ratio, and the turbomachinery has a larger thrust-to-weight ratio and higher efficiency.