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.

Representative embodiments of the invention provide a system, apparatus, and method of controlling an intensity and spectrum of light emitted from a solid state lighting system. The solid state lighting has a first emitted spectrum at a full intensity level and at a selected temperature, with a first electrical biasing for the solid state lighting producing a first wavelength shift, and a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift. Representative embodiments provide for receiving information designating a selected intensity level or a selected temperature, and providing a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum over a predetermined range of temperatures.

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 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 wheel support bearing assembly includes an outer member inserted in a knuckle, an inner member made up of a hub axle, double rows of rolling elements, and a cover closing an opening of one end of the outer member. The cover includes a sensor connector and a sensor cap. A pulsar ring is mounted on the inner race and a rotation sensor is opposed to the pulsar ring and embedded in the sensor connector. The cover extends over an outer surface of the sensor connector. The cover has a cylindrical portion mounted in an inner peripheral surface of one end of the outer member, which end forms a pilot portion for the knuckle. The cylindrical portion of the cover has an outer periphery provided with an annular elastic member held in contact with an inner peripheral surface of the knuckle.

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.

An integrated-style shear apparatus for testing a rock structural plane includes a frame system, a vertical loading system, a horizontal loading system, and a shearing system. Both the vertical loading system and the horizontal loading system are fixed on the frame system, and the shearing system is installed inside the frame system. The shearing system is used to prepare the sample of structural plane and actualize the shear test. The vertical loading system and the horizontal loading system are used to provide normal stress and shear stress for the shearing system respectively.

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 provides a multi-encoder fault diagnosis and remote measurement system and monitoring method thereof and belongs to the technical field of photoelectric encoder measurement, and aims tosolve a problem that remote measurement cannot be realized in real time in the prior art. A plurality of encoder units are connected with multiple encoder photoelectric signal processing systems and analysis treatment is performed on moire fringe photoelectric signals and angle measurement information is output. The encoder photoelectric signal processing systems transmits received moire fringe photoelectric signal sampling data and the output angle measurement information to a master control computer through a relay station. Each encoder photoelectric signal processing system is provided witha temperature sensor which transmits collected temperature information to the master control computer. The master control computer receives the moire fringe photoelectric signal sampling data, the output angle measurement information and the working temperature information transmitted from the relay station and directly controls and regulates photoelectric signal parameter information of each working encoder unit and monitors the measurement condition. The power module is connected with the multiple encoder photoelectric signal processing systems, the relay station and the master control computer.

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 medical equipment traction rehabilitation system based on an acceleration sensor. The system comprises a stepping motor, a traction rope, a traction head cover, a microprocessor module, a tension sensor, the acceleration sensor and a display module. The tension sensor is connected with the stepping motor, the traction rope and a microprocessor, and the acceleration sensor is placed on the traction rope and connected with the microprocessor. The microprocessor module is connected with the display module. The medical equipment traction rehabilitation system based on the acceleration sensor has the advantages that in multiple applications such as rehabilitation medical apparatus and instruments, the speed and displacement of traction need to be precisely controlled,relatively precise traction force is needed to be output, and otherwise medical accidents are easily caused or the effect is not achieved; according to the medical equipment traction rehabilitation system, in the rehabilitation medical apparatus and instruments, the acceleration sensor is introduced, accordingly, the accelerated speed, speed, displacement and traction force of the traction rope are precisely measured and fed back to the microprocessor, the output traction force is precisely adjusted through the stepping motor, accordingly, stable and precise traction force output is generated, and the traction state is stably and precisely controlled.

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 invention relates to the field of flexible sensors, in particular to a flexible capacitive sensor and a preparation method and application thereof. The flexible capacitive sensor comprises a dielectric layer and a flexible electrode, the flexible electrode is arranged on the surface of the dielectric layer, and the dielectric layer comprises a flexible dielectric elastomer substrate and inorganic high-dielectric particles. The flexible capacitive sensor has good stretchability and good dielectric response performance at the same time, the sensor is endowed with a high-baseline initial capacitance value by adding the inorganic high-dielectric particles, the capacity of the sensor for resisting pF-level electromagnetic interference in the external environment is improved, and the sensing range and the application field of the sensor are widened.

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.

A vibration and noise test bench for the yaw brake system of a wind power generator, which is composed of upper and lower pressurization modules, a motor module and a base; Between the shrinkage sections of the guide rods, the upper guide rods are sequentially connected to the upper and upper friction sensors, normal force sensors and the upper back plate, and the upper brake pads are bonded to the upper back plate; except for the mounting components, the lower pressure module The structure is the same as that of the upper pressurization module, and the upper and lower parts are arranged symmetrically; the motor structure module is: the servo motor is connected with the reducer and installed in the hollow support, and the upper part of the output shaft of the reducer is fixed with a brake disc. The upper and lower loading modules and the hollow support are respectively fixed on the inverted T-shaped notches of the machine base through screws. The modular design of each part of the test bench is convenient for disassembly and modification. The upper and lower loading modules can be loaded simultaneously or separately, which can simulate Various working conditions of the above-mentioned braking system provide information on its frictional vibration and noise characteristics to explore the influence of different test parameters on the frictional vibration characteristics of the braking system.

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 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 hydraulic device that utilizes self-weight potential energy feedback to assist the output torque of a servo motor, including a fuel tank, a variable-speed hydraulic pump, a booster mechanism, a servo motor, and an accumulator. The booster mechanism is respectively connected to a variable-speed hydraulic pump and a servo motor. The booster mechanism is respectively led to the high-pressure oil port and the low-pressure oil return port. A second electromagnetic directional valve is arranged between the oil chambers of the low-pressure oil return port. Auxiliary cylinder and main oil cylinder; the present invention uses hydraulic pressure to push the rotor to drive the servo motor shaft and variable speed hydraulic pump shaft, so that the servo motor can use less output torque to achieve greater torque transmission to drive the variable speed hydraulic pump, so that the small power servo motor can It can provide higher power output in a short time, and start faster, output and adjustment control are more stable and precise, achieve energy saving effect, replace the coupling, reduce the structure volume and the power cost of the power source.

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 invention discloses a hydraulic device for feeding back output torque of a power assisting servo motor by utilizing self-weight potential energy. The hydraulic device comprises an oil tank, a variable-speed hydraulic pump, a power assisting mechanism, the servo motor and an energy accumulator. The power assisting mechanism is connected with the variable-speed hydraulic pump and the servo motor, the power assisting mechanism is led to a high-pressure oil port and a low-pressure oil return port, a second electromagnetic directional valve is arranged in an oil cavity of the low-pressure oil return port, and four sets of rising auxiliary cylinders and a main oil cylinder are arranged above the second electromagnetic directional valve. According to the hydraulic device for feeding back output torque of the power assisting servo motor by utilizing self-weight potential energy, a rotor is pushed by hydraulic pressure to drive the servo motor shaft and a variable-speed hydraulic pump shaft, so that the servo motor achieves high-torque transmission with less output torque to drive the variable-speed hydraulic pump, the low-power servo motor can provide high-power output in a short time, the starting speed is higher, output and adjustment control are more stable and accurate, the energy-saving effect is achieved, a coupler is replaced, and the structural size and the power cost of a power source are reduced.

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 invention relates to a power output circuit, an LED drive circuit, a drive method and an LED, wherein the power output circuit comprises a main control chip, a power adjustment module and a control module. According to the invention, a dialer is combined with a grounding resistor, so that the segmented dial-up power adjustment is realized; the dialer is connected with different grounding resistors and upper bias resistors for voltage division, so that different output currents are realized, and the purpose of multiple gear power is achieved; power adjustment is realized through a mode, andthe circuit output current is only related to the ratio of the grounding resistor to the upper bias resistor, so that the grounding resistor and the upper bias resistor can adopt the K-ohm resistors,the interference generated by the dialer or the line internal resistance is solved, the constant output currents with different magnitudes can be stably and accurately outputted, the cost is low, andthe reliability is high.

The multi-degree-of-freedom compliant micromanipulator based on the bionic flapping wing involves a piezoelectric stack compliant micromanipulator, which includes an operating platform, a different-plane base, a connecting seat and three single-degree-of-freedom displacement mechanisms; A single-degree-of-freedom displacement mechanism, the operating platform is supported by three single-degree-of-freedom displacement mechanisms; each of the single-degree-of-freedom displacement mechanisms includes an internal displacement transmission mechanism and a frame with flexible hinges; the internal displacement transmission mechanism includes rigid Frame, push block, piezoelectric stack driver 1, piezoelectric stack driver 2 and paired amplification and decoupling mechanisms; the frame is connected to the operating platform, and the rigid frame is connected to the different-plane base. The invention has the advantages of no displacement coupling and multi-degree-of-freedom movement, and is suitable for micro-operation robot systems and micro-electromechanical systems.

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.