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公开(公告)号:US20220326058A1
公开(公告)日:2022-10-13
申请号:US17847626
申请日:2022-06-23
Applicant: DENSO CORPORATION
Inventor: Hiroyuki AKUZAWA , Taichi WATANABE , Amane HIGASHI
Abstract: A measurement control device includes: a sensing unit that outputs a signal according to an air flow rate; a pulsation state calculation unit that calculates a pulsation state of pulsation generated in the air flow rate using an output value of the sensing unit; and a pulsation error correction unit that corrects the air flow rate. The pulsation state calculation unit has an upper extreme value determination unit and a frequency calculation unit. The upper extreme value determination unit cancels the upper extreme value that has presently appeared, when the output value remains to be more than a predetermined lower threshold. The upper extreme value determination unit updates the lower threshold on a basis of at least one of air flow rate, pulsation frequency, or pulsation amplitude specified on the basis of the output value.
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公开(公告)号:US20230009483A1
公开(公告)日:2023-01-12
申请号:US17944562
申请日:2022-09-14
Applicant: DENSO CORPORATION
Inventor: Taichi WATANABE , Hiroyuki AKUZAWA , Amane HIGASHI
Abstract: A measurement control device includes a sensing unit and a low-pass filter unit. The sensing unit outputs an air flow rate value corresponding to an air flow rate flowing through a flow path. The low-pass filter unit removes high-frequency components included in the air flow rate value input from the sensing unit. The measurement control device calculates a pulsation state that is a state of a pulsation occurring in the air flow rate based on the air flow rate value that has passed through the low-pass filter unit. The measurement control device corrects the air flow rate value using the pulsation state.
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公开(公告)号:US20210108952A1
公开(公告)日:2021-04-15
申请号:US17132292
申请日:2020-12-23
Applicant: DENSO CORPORATION
Inventor: Noboru KITAHARA , Kengo ITO , Teruaki KAIFU , Amane HIGASHI
Abstract: A measurement control device measures an air flow rate using an output value of a sensing portion that outputs a signal according to the air flow rate, and outputs the measurement result of the air flow rate to a predetermined external device. The measurement control device includes: a pulsation state calculator that calculates a pulsation state, which is a state of pulsation generated in the air flow rate, by using the output value of the sensing portion instead of acquiring an output value from an external device; and a flow rate correcting unit that corrects the air flow rate using the pulsation state calculated by the pulsation state calculator.
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