5735results about How to "Stable output" patented technology

A power supply system capable of smoothing photovoltaic generation output, and enabling time shift is provided. A power supply system including a DC power supply string in which a storage battery is connected in parallel to a DC power supply; and a DC / AC power conversion device for connecting the DC power supply string to a power system or a load is provided. A switch is connected between the DC power supply and the storage battery, where an output power of the DC power supply or a combined output power of the DC power supply and the storage battery is switched and supplied to the DC / AC power conversion device by the switch. The photovoltaic generation output is thereby smoothed, and time shift is enabled.

An electric energy storage system (EESS) for providing a power management solution for a multi-subsystem energy storage in electric, hybrid electric, and fuel cell vehicles. The EESS has a controller that determines when to draw power from each subsystem as needed by the vehicle.

A manufacturing method of a liquid crystal display of the present invention is a manufacturing method of a liquid crystal display having a glass substrate provided thereon with a matrix of thin film transistors, each having a semiconductor film pattern formed by photo-etching a high-resistance semiconductor film and a low-resistance semiconductor film, and a third metal film serving as a source metal film layer layered on the semiconductor film pattern, in which the semiconductor film pattern is formed on the glass substrate first, and thence the third metal film is layered on the glass substrate. Consequently, a liquid crystal display can be manufactured with a fewer number of manufacturing steps while at the same time the manufacturing costs can be saved by preventing a decrease in the yield caused by film separation.

The invention relates to a series-parallel hybrid-driven piezoelectric pump, and belongs to the fields of fluid transmission and control. Upper and lower pump bodies are connected through screws; 2 to 20 piezoelectric vibrators are connected between pump cavities of the two pump bodies in a pressed mode; valve sheets are adhered to the pump cavities of the upper and lower pump bodies and the inlets of valve cavities; the inlet of the upper pump body and the adjacent pump cavity, two adjacent pump cavities, and the valve cavities and the adjacent pump cavities are communicated through inter-cavity flow channels; the valve cavities are communicated with outlets; a series pump I is formed by the pump cavities and the piezoelectric vibrators; the inlet of the lower pump body and the adjacent pump cavity, two adjacent pump cavities, and the valve cavities and the adjacent pump cavities are communicated through inter-cavity flow channels; a series pump II is formed by the pump cavities and the piezoelectric vibrators; the inlets of the series pumps I and II are communicated; and the valve cavities of the series pumps I and II are communicated and communicated with the outlet on the upper valve body. The pump has the advantages that a series-parallel pump is formed by a plurality of piezoelectric vibrators of which the two sides drive fluid simultaneously, so that the pump is high in flow, pressure and energy efficiency, low in pulsation and suitable for constructing a piezoelectric hydraulic driver with high system back pressure.

An optical sensor includes a light-emitting element for directing light to an image, a light-receiving element for receiving light reflected by the image, a normal detection optical path for allowing the light emitted by the light-emitting element and the light reflected from the image to follow a normal detection optical path during normal operation, a calibration reflecting plate disposed inside the optical sensor for reflecting light from the light-emitting element when sensitivity is calibrated, a calibration optical path for allowing the light emitted by the light-emitting element to follow a calibration optical path to the light-receiving element when the emitted light is reflected by the calibration reflecting plate, and a first optical function element disposed in the calibration optical path and switchable between a light permeating state, in which the light passes therethrough, and a light intercepting state, in which the light is blocked, when voltage is applied.

The present invention contemplates a programmed displacement to prolong the usage life of UV crystal for deep UV generation by displacing step by step the crystal with interval between steps much shorter than the degradation time of the crystal. Meanwhile, the present invention contemplates the programmed displacement to obtain stable UV generation by avoiding defect locations of the crystal. Further, the present invention contemplates the programmed displacement to achieve optimal stability in UV power for each layer of UV ablation in photo-refractive surgery.

It is to form a memory access circuit comprising a memory, a clock generator for generating a reference clock signal, and a clock delay adjusting circuit for delaying the reference clock signal to create a delay clock signal. The clock delay adjusting circuit is a circuit for generating a plurality of delay clock signals of various delay value. The memory access circuit further comprises a test data generator for generating test data and a memory access test controller for supplying a memory writing test start signal in reply to the external synchronizing signal. The test data generator generates the test data in reply to the memory writing test start signal, writes the test data into the memory in synchronization with the reference clock, and supplies the write data corresponding to the test data in synchronization with the reference clock, and the memory access test controller reads the test data from the memory in synchronization with the delay clock signal, compares the read test data with the write data, and adjusts the memory access timing according to as a result of the comparison.

In a temperature sensor having a temperature sensitive element, a sheath pin connected to the temperature sensitive element, and a cover case. The cover case, filled with a filler, accommodates the temperature sensitive element and the sheath pin. A hardening temperature of the filler is not less than an actual usage environment of the temperature sensor. Another temperature sensor has a temperature sensitive element exposed at a high temperature of not less than 750° C., a thermistor element, a sheath pin, an anti-vibration filler, and a metal cover case fixed to an end part of the sheath pin. The metal cover case accommodates the sheath pin and the thermistor element. The filler is made of a porous insulation material having a pore ratio within a range of 30 to 70% and filled around the thermistor element in the metal cover case.

The invention discloses a control method for motion stability and outline machining precision of a multi-shaft linkage numerical control system. The control method achieves control on the motion stability and outline machining errors of the multi-shaft linkage numerical control system by using a compound control mode of multi-shaft parameter module predictive control and non-linear self-adaptive fuzzy proportional-integral-derivative (PID) control. Simultaneously, error module calculating efficiency is improved by building an outline error module, a speed error module and an acceleration error module. By means of performance optimization indexes, tracking errors, outline errors, speed errors and acceleration errors of the system are minimum, and control performance of a multi-shaft servo control system is improved. Multi-shaft parameter module predicative control increment is solved through a simplified calculating module so as to meet real-time requirements of the control system. Robust property of the multi-shaft linkage numerical control system is improved by adopting the non-linear self-adaptive fuzzy PID control method. The control method effectively improves the motion stability and outline machining precision of the multi-shaft linkage numerical control system.