US 11,109,811 B2Granted

Waveform estimation apparatus, waveform estimation method, and non-transitory computer-readable storage medium

AssigneeFujitsu Limited

InventorOsafumi Nakayama

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Abstract

An apparatus is configured to execute: a first process for estimating a first component at a first time point by using a waveform and the first component calculated from the waveform before the first time point, the waveform being based on a running trace of a vehicle, the first component being less than a first frequency; a second process for estimating the first component at the first time point by using the waveform, the first component calculated from the waveform before the first time point, and a second component at the first time point, the second component being greater than the first frequency and predicted from the second component calculated from the waveform before the first time point; and a calculation process for calculating the second component at the first time point from the waveform based on the first components estimated by the first and second process.

Claims15

Dependent claims

A waveform estimation apparatus comprising:

a memory;
and
a processor coupled to the memory and configured to:
execute a first estimation process that includes estimating a first vibration component corresponding to a first time period by using an input waveform corresponding to the first time period and the first vibration component corresponding to a second time period, the first time period being a time period from a first time point and having a given time length, the second time period being a time period before the first time period and from a second time point through the first time point and having a time length same as the first time period, the first vibration component being a component less than a first frequency, the input waveform being a waveform based on a running trace of a vehicle which runs along a roadway;
execute a second estimation process that includes estimating the first vibration component corresponding to the first time period by using the input waveform corresponding to the first time period and the first vibration component corresponding to the second time period and further a second vibration component corresponding to the first time period, wherein the second vibration component is a component equal to or greater than the first frequency and being predicted from the second vibration component corresponding to the second time period;
execute a calculation process that includes calculating the second vibration component corresponding to the first time period from the input waveform corresponding to the first time period by using the first vibration component estimated by the first estimation process and the first vibration component estimated by the second estimation process;
execute a determination process that includes determining, by using a characteristic amount of the second vibration component calculated by the calculation process, a danger level indicating how dangerously the vehicle is driven;
and
in response to the danger level being higher than a threshold, change a vehicle drive mode of the vehicle.

6 more elements

A method for waveform estimation, the method comprising:

executing a first estimation process that includes estimating a first vibration component corresponding to a first time period by using an input waveform corresponding to the first time period and the first vibration component corresponding to a second time period, the first time period being a time period from a first time point and having a given time length, the second time period being a time period before the first time period and from a second time point through the first time point and having a time length same as the first time period, the first vibration component being a component less than a first frequency, the input waveform being a waveform based on a running trace of a vehicle which runs along a roadway;
executing a second estimation process that includes estimating the first vibration component corresponding to the first time period by using the input waveform corresponding to the first time period and the first vibration component corresponding to the second time period and further a second vibration component corresponding to the first time period, wherein the second vibration component is a component equal to or greater than the first frequency and being predicted from the second vibration component corresponding to the second time period;
executing a calculation process that includes calculating the second vibration component corresponding to the first time period from the input waveform corresponding to the first time period by using the first vibration component estimated by the first estimation process and the first vibration component estimated by the second estimation process;
executing a determination process that includes determining, by using a characteristic amount of the second vibration component calculated by the calculation process, a danger level indicating how dangerously the vehicle is driven;
and
in response to the danger level being higher than a threshold, change a vehicle drive mode of the vehicle.

3 more elements

A non-transitory computer-readable storage medium for storing a program that causes a processor to execute a process for waveform estimation, the process comprising:

executing a first estimation process that includes estimating a first vibration component corresponding to a first time period by using an input waveform corresponding to the first time period and the first vibration component corresponding to a second time period, the first time period being a time period from a first time point and having a given time length, the second time period being a time period before the first time period and from a second time point through the first time point and having a time length same as the first time period, the first vibration component being a component less than a first frequency, the input waveform being a waveform based on a running trace of a vehicle which runs along a roadway;
executing a second estimation process that includes estimating the first vibration component corresponding to the first time period by using the input waveform corresponding to the first time period and the first vibration component corresponding to the second time period and further a second vibration component corresponding to the first time period, wherein the second vibration component is a component equal to or greater than the first frequency and being predicted from the second vibration component corresponding to the second time period;
executing a calculation process that includes calculating the second vibration component corresponding to the first time period from the input waveform corresponding to the first time period by using the first vibration component estimated by the first estimation process and the first vibration component estimated by the second estimation process;
executing a determination process that includes determining, by using a characteristic amount of the second vibration component calculated by the calculation process, a danger level indicating how dangerously the vehicle is driven;
and
in response to the danger level being higher than a threshold, change a vehicle drive mode of the vehicle.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/194,426Filed 19 Nov 2018
Priority: JP JP2017-22288220 Nov 2017
Published: US 2019/0150847 A123 May 2019
Granted: 7 Sep 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61B 5/7239
Details of waveform analysis: using differentiation including higher order derivatives
A61B 5/18
Devices for psychotechnics ; Testing reaction times ; Devices for evaluating the psychological state: for vehicle drivers or machine operators
A61B 5/6893
Mounted on external non-worn devices, e.g. non-medical devices: cars
A61B 5/7278
Specific aspects of physiological measurement analysis: artificial waveform generation or derivation, e.g. synthesizing signals from measured signals

Family

US 2019/0150847 A1Pre-grant publication · published 23 May 2019
US 11,109,811 B2This patent

From the US filing history. Foreign family members aren’t listed.

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