VEHICLE STATE DETERMINATION DEVICE, VEHICLE STATE DETERMINATION METHOD, AND DRIVING OPERATION DIAGNOSIS DEVICE
First Claim
1. A vehicle state determination device that determines an operation state of a brake of a vehicle based on information obtained from an acceleration sensor, the vehicle state determination device, comprising:
- a storage section, which chronologically stores acceleration obtained from the acceleration sensor;
a determination starting instruction section, which instructs the start of determining the operation state of the brake based on a time point of terminating the brake operation, the time point being estimated based on a fact that an amount of change of the obtained acceleration is less than a predetermined value;
an exclusion period-of-time selecting section, which refers to the acceleration stored in the storage section from a time point when the determination starting instruction section instructs the start of determination toward the past, thereby selecting, as an exclusion period-of-time, a period of time in which the referenced acceleration decreases toward the past; and
an operation start identifying section which, for a target period of time, which is before the selected exclusion period-of-time, identifies a time point when the brake operation is started based on changes in acceleration in the target period of time.
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Accused Products
Abstract
A vehicle state determination device determines the operating state of the brakes of the vehicle on the basis of information obtained from an acceleration sensor. A data log unit stores, over time, the acceleration acquired from the acceleration sensor. A stop detection unit issues an instruction to start determining the operating state of the brakes on the basis of the timing of the end of a braking operation, which is estimated on the basis of the fact that the amount of change in the acceleration is less than a prescribed value. A first range selection unit refers to the acceleration, which is stored in the data log unit, toward the past from the time at which an instruction to start determining the operating state of the brakes was issued, and establishes a period in which the acceleration is decreasing toward the past as an exclusion period.
26 Citations
21 Claims
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1. A vehicle state determination device that determines an operation state of a brake of a vehicle based on information obtained from an acceleration sensor, the vehicle state determination device, comprising:
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a storage section, which chronologically stores acceleration obtained from the acceleration sensor; a determination starting instruction section, which instructs the start of determining the operation state of the brake based on a time point of terminating the brake operation, the time point being estimated based on a fact that an amount of change of the obtained acceleration is less than a predetermined value; an exclusion period-of-time selecting section, which refers to the acceleration stored in the storage section from a time point when the determination starting instruction section instructs the start of determination toward the past, thereby selecting, as an exclusion period-of-time, a period of time in which the referenced acceleration decreases toward the past; and an operation start identifying section which, for a target period of time, which is before the selected exclusion period-of-time, identifies a time point when the brake operation is started based on changes in acceleration in the target period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicle state determination method that is used in a vehicle state determination device for determining an operation state of a brake of a vehicle based on information obtained from an acceleration sensor, thereby determining the operation state of the brake of the vehicle, the vehicle state determination method comprising:
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causing a storage section to chronologically store acceleration obtained from the acceleration sensor; instructing the start of determining the operation state of the brake based on a time point of terminating the brake operation, the time point being estimated based on a fact that an amount of change of the obtained acceleration is less than a predetermined value; referring to the acceleration stored in the storage section from a time point when the start of determination is instructed toward the past, thereby selecting, as an exclusion period-of-time, a period of time in which the referenced acceleration decreases toward the past; and for a target period of time, which is before the selected exclusion period-of-time, identifying a time point when the brake operation is started based on changes in acceleration in the target period of time. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification