30results about How to "Stable and accurate output" patented technology

An apparatus, method and system are provided for power conversion to supply power to a load such as a plurality of light emitting diodes. An exemplary apparatus comprises: a first power converter stage having a first power switch and a first inductive element; a second power converter stage having a second power switch and a second inductive element; a plurality of sensors; and a controller. The second power converter stage provides an output current to the load. The controller is adapted to use a sensed input voltage to determine a switching period, and is further adapted to turn the first and second power switches into an on-state at a frequency substantially corresponding to the switching period while maintaining a switching duty cycle within a predetermined range.

The invention provides a portable health-monitoring device with the function of motion compensation, comprising: a motion sensor (5) for detecting the motion signal of detected people; a biomedicine sensor (1) for detecting the biomedicine signal of detected people; and a motion compensation module (14) coupled to the motion sensor and the biomedicine sensor for compensating the biomedicine signal via the motion signal when the motion signal is less than a threshold value detected by the motion sensor, and the outputs the compensated signal as well as memories said output value of the portable health-monitoring device; in addition, when the motion signal is bigger than the threshold value detected by the motion sensor, the motion compensation module uses the memorized output value as the output of said portable health-monitoring device. The invention also provides a relative method for aforementioned device.

A bearing assembly with a rotation sensor, comprising an outer member (1), an inner member (2), a plurality of rolling elements (3) interposed between the opposed raceway surfaces, and a rotation sensor (4). The rotation sensor (4) includes an annular magnetic encoder (15) and an annular magnetic sensor (16) fitted to the outer member (1) through a sensor cap (12) and a sensor connector (22). The sensor cap (12) is formed in a cylindrical shape having a bottom shape, and has an opening end fitted to an inner periphery or outer periphery of the outer member (1) The sensor connector (22) is formed integrally with the magnetic sensor (16), formed in a polygonal shape on its outer periphery, and fitted to the inner periphery of the sensor cap (12) by a press-fitting.

The invention discloses a magnetic measurement positioning device, which comprises a packaging shell, wherein side guide wheels are respectively arranged on the upper portion and the lower portion of the packaging shell along the axial direction, a first three-dimensional fluxgate sensor is arranged on the upper portion of the packaging shell, a second three-dimensional fluxgate sensor is arranged on the lower portion of the packaging shell, the first and the second three-dimensional fluxgate sensors are respectively connected with signal collecting modules through wires, the signal collecting modules are connected with power supply and signal transmission cables which extend outside the packaging shell, and the distance between the first and the second three-dimensional fluxgate sensors is kept in constant. The invention provides the magnetic measurement positioning device and a method for monitoring slope deep displacement by utilizing the magnetic measurement positioning device can solve the problems that displacement values which meet monitoring accuracy requirement can not be calculated and more sensors are used, guarantee measurement accuracy of deep displacement, greatly reduce system cost, and is convenient in popularization and application.

The invention discloses a coder, and the coder comprises a coder support, a PCB assembly, and a reflection-type code disc. An inner side of the PCB assembly is provided with a plurality of reflection-type photoelectric devices, and the PCB assembly is installed in the coder support in an integrated manner. The reflection-type code disc is provided with a plurality of code tracks on an inner side surface, and is arranged to be opposite to the PCB assembly. Moreover, the plurality of code tracks on the reflection-type code disc cooperate with the plurality of reflection-type photoelectric devices on the PCB assembly. According to the invention, the plurality of reflection-type photoelectric devices are employed for cooperating with the reflection-type code disc to form a new coder element module, thereby enabling the coder to stably and precisely output U\V\W signals, and to be higher in cost performance.

The invention discloses a radiotherapy dose planning method and system for implanting particles into a tumor, and a medium, and is used for a radiotherapy interventional surgical robot in radioactive particles. The method comprises the following steps: obtaining medical image information; a medical image multi-organ segmentation step of performing multi-organ segmentation on the medical image, including labeling one or more organs on the medical image; a puncture needle path planning step: limiting a feasible path of a puncture needle based on the marked organ and the virtual needle insertion panel; a radioactive particle radiation dose calculation step: calculating the radiation dose of the radioactive particles in the in-vivo environment; and a radioactive particle source arrangement dose optimization step: optimizing the number and spatial positions of the implanted particles according to the radiation dose of the particles and the form and volume of the tumor focus to obtain a particle source arrangement result with the accumulated radiation dose meeting the set dose. According to the invention, radiation particle dose distribution meets clinical requirements.

The invention discloses a closed loop control device and method based on double detection LTE signal levels, and belongs to the technical field of test technology. According to the closed loop control device and method disclosed by the invention, inherent temperature drift of a negative feedback closed loop circuit and errors introduced by device aging are eliminated in the double detection manner; signal insertion loss compensation introduced by the negative feedback closed loop circuit and amplitude control range expansion are realized by a channel combination amplifying circuit; fast processing of amplitude control in three dimensions of time domain, frequency domain and temperature of a communication signal is realized by an FPGA digital signal processing unit; amplitude negative feedback closed loop control is carried out in a specific sub-frame by the amplitude negative feedback closed loop principle, the problem that the amplitude control of the negative feedback closed loop cannot be carried in a broadband communication time slot signal is effectively solved, the stable and accurate output of a high speed time slot signal in modern communication is realized, and the requirements of modern communication equipment and terminal test on the long-term stable and accurate output of the large bandwidth communication signal are satisfied.

The invention relates to a impulse non-stepped speed changer, wherein, one end of transmission is connected to the input axle, and another end is connected to the input axle to seal two central wheels of 2Z-X type positive taper gear differential wheel system whose closed transmission rate is 1:1; it uses rotational arm to output power and stepped output the power via two combined devices with 180 degree phase difference. The invention has overcome the defect the of traditional impulse non-stepped speed changer, with reasonable structure, simple control, high economic benefit, high loading ability, wider speed change rage, stable output torque, and the application for high-speed large power vehicle speed change system.

The invention relates to a self-pressurizing cryoablation system, which comprises cryoablation equipment and a cryoablation catheter, wherein the cryoablation equipment comprises a control unit, a vacuum unit and a delivery unit; the delivery unit comprises an air source manufacturing device, an air path control device, a low-temperature conversion device and an equipment connecting piece which are sequentially connected; the air outlet end and the vacuum unit of the equipment connecting piece are communicated with the cryoablation catheter; the low-temperature conversion device comprises a dewar bottle and a heat exchanger; the air source manufacturing device is arranged in the dewar bottle; the air outlet end of the air source manufacturing device is communicated with the air inlet end of the air path control device; the air source manufacturing device comprises a coolant storage tank, a pressure relief valve communicated with the coolant storage tank, a coolant supplement joint communicated with the coolant storage tank and a heating device arranged in the coolant storage tank; and the control unit is electrically connected with the vacuum unit, the heating device and the air path control device. The large and heavy pressurized air tank without external connector is helpful to save the space of cryoablation equipment.

The embodiment of the invention provides a soldering flux supply system and method. The system comprises a nozzle, a pressure liquid storage tank and a gas transmitter. The nozzle is provided with anoutput port for enabling soldering flux to flow out; the pressure liquid storage tank is provided with a cavity capable of containing the soldering flux and communicates with the nozzle; the solderingflux in the pressure liquid storage tank is conveyed towards the nozzle under the action of air pressure in the pressure liquid storage tank; and the gas transmitter communicates with the pressure liquid storage tank and is used for conveying gas for the pressure liquid storage tank and controlling the conveying amount of the gas so as to adjust the air pressure in the pressure liquid storage tank. According to the technical scheme, the flow of the soldering flux can be adjusted, and the soldering flux can be stably and accurately output.

The invention discloses a multi-degree-of-freedom compliant micromanipulator based on bionic flapping wings, and relates to a piezoelectric stacked compliant micromanipulator. The multi-degree-of-freedom compliant micromanipulator comprises an operation platform, a non-planar base, a connecting seat and three single-degree-of-freedom displacement mechanisms. The three single-degree-of-freedom displacement mechanisms are installed on the non-planar base, and the operation platform is supported by the three single-degree-of-freedom displacement mechanisms. Each single-degree-of-freedom displacement mechanism comprises an internal displacement transmission mechanism and a machine frame with a flexible hinge. Each internal displacement transmission mechanism comprises a rigid frame, a pushingblock, a piezoelectric stacked driver I, a piezoelectric stacked driver II and amplification decoupling mechanisms arranged in pairs. The machine frames are connected with the operation platform, andthe rigid frames are connected with the non-planar base. The multi-degree-of-freedom compliant micromanipulator has the advantages of no displacement coupling and multi-degree-of-freedom motion, and is applied to micro-operation robot systems and micro-electromechanical systems.

The invention discloses a photoelectric conversion chassis and relates to the technical field of photoelectric conversion. The photoelectric conversion chassis comprises a first input module, a secondinput module, a display device, a processor, a storage module, a first output module, a second output module, a remote communication module, and a remote device. Due to the setting of the first inputmodule and the second input module, different digital quantity or analog quantity can be output, the converted digital quantity or analog quantity can be effectively output by the first input moduleand the second input module and are displayed by the display device in real time; by adopting the CPCI series industrial control board, the input and output of the photoelectric conversion chassis aremore stable and accurate; and due to the setting the remote device and the remote communication module, the remote automatic monitoring of the photoelectric conversion chassis can be achieved.

An oscillator and a self-calibration method thereof are provided. The oscillator includes: an oscillation unit for generating an oscillation signal; a converting unit for converting frequency of the oscillation signal into a voltage signal; a comparison unit for comparing the voltage signal with a first voltage corresponding to a higher frequency and a second voltage corresponding to a lower frequency, and outputting a comparison result signal; an adjusting unit for storing a calibration value, adjusting the calibration value based on the comparison result signal and outputting a calibration signal corresponding to the adjusted calibration value; and a calibration unit for calibrating the frequency of the oscillation signal based on the calibration signal. Self-calibration for the frequency of the oscillation signal may be achieved, which may ensure the stability of the frequency of the oscillation signal.

The present invention provides a platform device and method capable of compensating non-coaxiality of a rotary encoder. The platform device comprises a supporting frame, a horizontal arm, a vertical arm, a floating table and an encoder, a vertical sliding sleeve of the horizontal arm is in sliding fit with a supporting rod of the supporting frame, horizontal sliding sleeves at the two ends of the vertical arm are in sliding fit with the horizontal arm, and the floating table is in sliding fit with the vertical arm. The encoder is connected with the floating table, the floating table synchronously acts along with the encoder when the encoder slightly moves, and the encoder is connected with a transmission shaft of bridge portal crane driving equipment through a rotating shaft of the encoder. The device overcomes the problem that the opening degree of the bridge door cannot be accurately fed back to main control equipment to influence the normal operation of the equipment when the original bridge door machine and the encoder are slightly non-coaxial, and has the advantages of simple structure, compensation of the tiny non-coaxial condition of the rotating shaft of the encoder and the transmission shaft of the driving equipment, synchronous operation of the encoder and the monitored equipment, high reliability and the like. Stable and accurate code value output of the encoder is ensured, safe operation of equipment is ensured, and operation is simple and convenient.