US 12,332,280 B2
Voltage source approach detection voltage detector
Yoji Oura, Yachiyo (JP); Masami Kojima, Hachioji (JP); Masakatsu Sawada, Fujisawa (JP); Ryuzo Noda, Miyazaki (JP); and Kazuaki Matsuo, Miyazaki (JP)
Assigned to Kandenko Co., Ltd, Tokyo (JP); Sanwa Electric Instrument Co., Ltd., Tokyo (JP); and CDN Corporation, Miyazaki (JP)
Filed by KANDENKO CO., LTD., Tokyo (JP); Sanwa Electric Instrument Co., Ltd., Tokyo (JP); and CDN CORPORATION, Miyazaki (JP)
Filed on Mar. 29, 2023, as Appl. No. 18/192,192.
Prior Publication US 2024/0329088 A1, Oct. 3, 2024
Int. Cl. G01R 15/14 (2006.01); G01R 19/165 (2006.01); G08B 21/18 (2006.01)
CPC G01R 15/144 (2013.01) [G01R 19/16576 (2013.01); G08B 21/182 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A voltage source approach detection voltage detector detecting approach to a voltage source, wherein
a detection circuit has: a first electrode having, as a measurement target, a voltage induced in a human body due to approach to the voltage source; and a second electrode having, as a measurement target, a voltage on the ground,
a circuit is provided to output a signal from the detection circuit at the time when the human body approaches the voltage source,
the first electrode is formed of a plate having a predetermined area with a dielectric body being interposed between the first electrode and the human body, and
the second electrode has such a shape that a perpendicular projection area to the first electrode is small while an area for the ground is large.