Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ELECTROSTATIC SENSOR AND DOOR HANDLE
Document Type and Number:
WIPO Patent Application WO/2019/069650
Kind Code:
A1
Abstract:
An electrostatic sensor characterized by comprising a detection electrode, a shield electrode that is provided around the detection electrode, a first alternating current power supply that is connected to the detection electrode and generates an alternating current that has a first voltage amplitude, a second alternating current power supply that is connected to the shield electrode and generates an alternating current that has a second voltage amplitude, a charge measurement unit that measures the charge flowing to the detection electrode from the first alternating current power supply, and a control unit that is connected to the charge measurement unit, wherein the frequencies and phases of the alternating current generated at the first alternating current power supply and the alternating current generated at the second alternating current power supply are the same, the second voltage amplitude of the alternating current generated at the second alternating current power supply is greater than the first voltage amplitude of the alternating current generated at the first alternating current power supply, and an object to be detected on the detection surface side is detected on the basis of changes in the electrostatic capacitance between the detection electrode and the object to be detected.

Inventors:
FUJIYOSHI, Tatsumi (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
SASAKI, Takashi (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
YAMADA, Tomoki (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
Application Number:
JP2018/033868
Publication Date:
April 11, 2019
Filing Date:
September 12, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ALPS ALPINE CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
International Classes:
G01V3/08; B60J5/00; B60J5/04; E05B81/76; E05B85/16
Domestic Patent References:
WO2011024306A12011-03-03
Foreign References:
JP2000080703A2000-03-21
JP2005227225A2005-08-25
JP2014228335A2014-12-08
JP2012141137A2012-07-26
JP2010286384A2010-12-24
JP2006515665A2006-06-01
Attorney, Agent or Firm:
ITOH, Tadashige et al. (16th Floor, Marunouchi MY PLAZA 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Download PDF: