SIGNAL PROCESSING DEVICE, MEASURING DEVICE, AND MEASUREMENT METHOD

• Main Authors: KURASHIMA TAKAYUKI, MAAKI SHOTARO, HOTTA AKIZUMI, NARUSAWA TOMOHIRO, HAMA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 13.12.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To measure the impedance of a battery by a simple structure.SOLUTION: A measuring device 1 for sampling a voltage signal Va occurring to a battery 10 to which an AC current Ia is applied and measuring the impedance of the battery 10, applies an AC current Ia to the battery 10, said current having a prescribed frequency fi which is defined so that the sampled value changes sequentially. Further, the measuring device 1 samples the voltage signal Va on a prescribed cycle Ts which is longer than the half-wavelength cycle of the AC current Ia, and computes the impedance of the battery 10 on the basis of discrete data that indicates a group of sampled discrete values Vd.SELECTED DRAWING: Figure 1 【課題】簡易な構成により電池のインピーダンスを測定する。【解決手段】交流電流Ｉａが印加された電池１０に生じる電圧信号Ｖａを標本化して電池１０のインピーダンスを測定する測定装置１は、標本化した値が順次変化するように定められた所定の周波数ｆｉを有する交流電流Ｉａを電池１０に印加する。さらに測定装置１は、交流電流Ｉａの半波長分の周期よりも長い所定の周期Ｔｓで電圧信号Ｖａを標本化し、標本化した離散値Ｖｄの一群を示す離散データに基づいて電池１０のインピーダンスを演算する。【選択図】図１