公开(公告)号：US20210063226A1

公开(公告)日：2021-03-04

申请号：US16750207

申请日：2020-01-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Haozhe Tang ,  Yang Li ,  Songhua Hu

IPC: G01F23/26

Abstract: An apparatus for filtering touches and disturbances of a container comprises a processing unit (PU) and computer-readable storage devices storing machine instructions. The PU obtains and sums together sensor values for a first sampling time from electrodes affixed to the container. The PU determines a difference between the sum for the first sampling time and a sum for a second sampling time, which is compared to a threshold representative of a change in capacitance due to a touch on the container. The PU determines whether the touch on the container has occurred at the first sampling time based on the comparison. If a touch occurred, the PU continues to obtain additional sensor values for additional sampling times and determine whether a touch on the container has occurred at the additional sampling times, until determining no touch occurred. The PU determines liquid level for the container after determining no touch occurred.

公开(公告)号：US11287301B2

公开(公告)日：2022-03-29

申请号：US16750207

申请日：2020-01-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Haozhe Tang ,  Yang Li ,  Songhua Hu

IPC: G01F23/26 ,  G01F23/263

Abstract: An apparatus for filtering touches and disturbances of a container comprises a processing unit (PU) and computer-readable storage devices storing machine instructions. The PU obtains and sums together sensor values for a first sampling time from electrodes affixed to the container. The PU determines a difference between the sum for the first sampling time and a sum for a second sampling time, which is compared to a threshold representative of a change in capacitance due to a touch on the container. The PU determines whether the touch on the container has occurred at the first sampling time based on the comparison. If a touch occurred, the PU continues to obtain additional sensor values for additional sampling times and determine whether a touch on the container has occurred at the additional sampling times, until determining no touch occurred. The PU determines liquid level for the container after determining no touch occurred.