Wiper control device
AssigneeDenso Electronics Corporation
InventorsTaiki Soma, Yasuo Naruse, Manabu Morita, Tomokatsu Fuseya, Mitsuyoshi Tomida
Life of this patent
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Abstract
A wiper control device includes an acquisition unit and an estimation unit. The estimation unit is configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position. The estimation unit is configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor. The current ripple has a periodicity corresponding to driving of the wiper motor.
Claims18
A wiper control device comprising:
- an acquisition unit configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position;
- and
- an estimation unit configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor, the current ripple having a periodicity corresponding to driving of the wiper motor, wherein
- the estimation unit is configured to estimate the wiper angle based on a number of times that an absolute value of an amount of change in the current flowing through the wiper motor becomes equal to or greater than a threshold value.
A wiper control device comprising:
- an acquisition unit configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position;
- and
- an estimation unit configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor, the current ripple having a periodicity corresponding to driving of the wiper motor, wherein
- the estimation unit is configured to estimate the wiper angle based on a number of times that the current flowing through the wiper motor changes from being less than a threshold value to being equal to or greater than the threshold value.
A wiper control device comprising:
- an acquisition unit configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position;
- and
- an estimation unit configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor, the current ripple having a periodicity corresponding to driving of the wiper motor, wherein
- the estimation unit is configured to estimate the wiper angle based on a number of times that the current flowing through the wiper motor changes from being greater than a threshold value to being equal to or less than the threshold value.
Dependencies are inferred from the claim text.