The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2023
Filed:
May. 06, 2022
Hitachi, Ltd., Tokyo, JP;
Tomohiko Yano, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electric field measuring device measures an electric field corresponding to an inter-electrode voltage between two electrodes, based on a voltage signal that arises at an electric field antenna including the two electrodes because of the electric field. The electric field measuring device includes an amplifier, a reference capacitive element, a GPIO that generates a step wave, and a microcomputer that processes a voltage signal. The microcomputer inputs the step wave to the amplifier, using the GPIO, obtains a step response waveform, and obtains an amplitude compensation factor, based on the step response waveform. The microcomputer compensates the voltage signal, using the amplitude compensation factor.