| THE TOKYO ELECTRIC POWER CO., INC. Patent applications |
| Patent application number | Title | Published |
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| 20100218618 | DOPPLER TYPE ULTRASONIC FLOW METER, FLOW METERING METHOD, AND COMPUTER PROGRAM - Provided is a technique for performing a precise flow rate measurement of a large-bore pipeline without causing any aliasing. Ultrasonic pulses are transmitted at a first repetition frequency and at a second repetition frequency different from the first one, and a fluid velocity distribution measuring means measures a first flow velocity distribution for the first repetition frequency and a second flow velocity distribution for the second repetition frequency. A flow rate calculating means specifies either a first noise-superposed area to occur with the first repetition frequency or a second noise-superposed area to occur with the second repetition frequency, and calculates the flow velocity distribution either by eliminating the noise-superposed area from the first flow velocity distribution and interpolating it with the second flow velocity distribution or by eliminating the second noise-superposed area from the second flow velocity distribution and interpolating it with the first flow velocity distribution. | 09-02-2010 |
| 20090262985 | VIBRATION MEASURING SYSTEM, VIBRATION MEASURING METHOD, AND COMPUTER PROGRAM - There is provided a non-contact vibration measurement technique for a structure by continuously imaging the structure from a far distance using a PIV system and measuring vibration through image analysis. A vibration measurement method includes an imaging step for imaging an object separated by a long distance at a minute time interval by including a long focus optical system, an image processing step for comparing luminance pattern distributions at plural time instants obtained by the imaging step so as to measure a moving direction and a moving amount of a predetermined particle image in the object, a measuring result input step for inputting numerous measurement results of the moving direction and the moving amount of the predetermined particle image measured by the image processing step, a vibration frequency calculation step for calculating an acceleration vector from the imaging interval and performing Fourier transform thereon so as to calculate the vibration frequency of the object, and a vibration frequency output step for outputting the calculation result obtained by the vibration frequency calculation step. | 10-22-2009 |
