US 12,267,068 B2
Detection method, detection device, and detection system
Ryo Nakae, Okayama (JP); Takehiko Nara, Okayama (JP); and Naoki Tanaka, Okayama (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/579,835
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jul. 21, 2022, PCT No. PCT/JP2022/028347
§ 371(c)(1), (2) Date Jan. 16, 2024,
PCT Pub. No. WO2023/013430, PCT Pub. Date Feb. 9, 2023.
Claims priority of application No. 2021-127758 (JP), filed on Aug. 3, 2021.
Prior Publication US 2024/0322824 A1, Sep. 26, 2024
Int. Cl. H03K 17/96 (2006.01); H01H 13/00 (2006.01); H01H 13/52 (2006.01); H03K 17/975 (2006.01); H04N 23/51 (2023.01); G06F 3/041 (2006.01)
CPC H03K 17/962 (2013.01) [H01H 13/00 (2013.01); H01H 13/52 (2013.01); H03K 17/975 (2013.01); H04N 23/51 (2023.01); G06F 3/0414 (2013.01); G06F 2203/04105 (2013.01); H03K 2217/96071 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A detection method comprising:
obtaining periodically and repeatedly sensor values output from a capacitive sensor, and storing, in memory, the sensor values obtained as sensor data, the sensor data being time-series data;
determining whether the sensor values obtained exceed a first threshold;
calculating, as a first difference value of each of target sensor values, a difference between the target sensor value and a sensor value immediately before the target sensor value, the target sensor values including a sensor value determined to exceed the first threshold and past sensor values in reverse chronological order from the sensor value determined to exceed the first threshold;
calculating, as a second difference value of each of the target sensor values, a difference between (i) the first difference value of the target sensor value and (ii) the first difference value of the sensor value immediately before the target sensor value;
comparing each of the second difference values calculated and a second threshold, and selecting one sensor value from the sensor data based on a result of the comparing; and
outputting the one sensor value selected.