Driver load measuring method, device, and program for a vehicle accompanied by attitude changes, and storage medium for storing the program
First Claim
1. A driver load measuring device for measuring a load on a driver driving a vehicle accompanied by attitude changes, said driver load measuring device comprising:
- angular velocity detecting means for periodically detecting an angular velocity of said vehicle driven by said driver to which said load is applied;
angular velocity predicting means for predicting a value for said angular velocity at an n-th timing from values for said angular velocity at the previous timings before said n-th timing, according to time-series data of said angular velocity detected above;
means for obtaining an error between said predicted value and said detected value for said angular velocity at said n-th timing; and
load calculating means for calculating said load according to a distribution of said errors in a predetermined time periods,wherein said load calculating means comprises;
means for obtaining a percentile value α
at a predetermined probability of said errors;
means for setting a plurality of ranges (cells) discrete from said percentile value α
at a predetermined rate, according to said percentile value α
;
means for classifying all of said errors into said plurality of cells; and
means for obtaining an entropy of said angular velocity according to the results of classification of said errors;
said load on said driver being represented by said entropy of said angular velocity.
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Abstract
A driver load measuring method, device, and program, and a storage medium for storing the program for accurately measuring a load on a driver driving a vehicle accompanied by attitude changes. The driver load measuring device includes a yaw rate detecting section for detecting a yaw rate y as an example of the angular velocity of a vehicle accompanied by attitude changes, a storing section for storing the results of detection of the yaw rate y, a predicting section for predicting an n-th yaw rate according to an actual [n-1]-th yaw rate y[n-1], an actual [n-2]-th yaw rate y[n-2], and an actual [n-3]-th yaw rate y[n-3] each detected previously, an error calculating section for calculating an error between a predicted result yp[n] of the n-th yaw rate and an actual n-th yaw rate y[n], a frequency distribution recording section for recording a frequency distribution of the errors e in a predetermined time period, and a cell setting section for obtaining a percentile (% tile) value α according to the above frequency distribution and setting a plurality of ranges (cells) discrete from this % tile value α at a predetermined rate.
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Citations
11 Claims
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1. A driver load measuring device for measuring a load on a driver driving a vehicle accompanied by attitude changes, said driver load measuring device comprising:
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angular velocity detecting means for periodically detecting an angular velocity of said vehicle driven by said driver to which said load is applied; angular velocity predicting means for predicting a value for said angular velocity at an n-th timing from values for said angular velocity at the previous timings before said n-th timing, according to time-series data of said angular velocity detected above; means for obtaining an error between said predicted value and said detected value for said angular velocity at said n-th timing; and load calculating means for calculating said load according to a distribution of said errors in a predetermined time periods, wherein said load calculating means comprises; means for obtaining a percentile value α
at a predetermined probability of said errors;means for setting a plurality of ranges (cells) discrete from said percentile value α
at a predetermined rate, according to said percentile value α
;means for classifying all of said errors into said plurality of cells; and means for obtaining an entropy of said angular velocity according to the results of classification of said errors; said load on said driver being represented by said entropy of said angular velocity. - View Dependent Claims (2, 3)
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4. A driver load measuring method for measuring a load on a driver driving a vehicle accompanied by attitude changes, said driver load measuring method comprising the steps of:
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periodically detecting an angular velocity of said vehicle driven by said driver to which said load is applied; predicting a value for said angular velocity at an n-th timing from values for said angular velocity at the previous timings before said n-th timing, according to time-series data of said angular velocity detected above; obtaining an error between said predicted value and said detected value for said angular velocity at said n-th timing; and calculating said load according to a distribution of said errors in a predetermined time period, wherein said load calculating step comprises the steps of; obtaining a percentile value α
at a predetermined probability of said errors;setting a plurality of ranges (cells) discrete from said percentile value α
at a predetermined rate, according to said percentile value α
,classifying all of said errors into said plurality of cells; and obtaining an entropy of said angular velocity according to the results of classification of said errors; said load on said driver being represented by said entropy of said angular velocity. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A driver load measuring device for measuring a load on a driver driving a vehicle accompanied by attitude changes, said driver load measuring device comprising:
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angular velocity detecting means for periodically detecting an angular velocity of said vehicle driven by said driver to which said load is applied; angular velocity predicting means for predicting a value for said angular velocity at an n-th timing from values for said angular velocity at the previous timings before said n-th timing, according to time-series data of said angular velocity detected above; means for obtaining an error between said predicted value and said detected value for said angular velocity at said n-th timing; and load calculating means for calculating said load according to a distribution of said errors in a predetermined time period, wherein said load calculating means comprises; means for obtaining a percentile value α
from first errors of an angular velocity detected by applying a first load to said driver and setting reference cells according to said percentile value α
,means for classifying said first errors into said reference cells; means for calculating a first entropy of said angular velocity according to the results of classification of said first errors; means for classifying into said reference cells second errors of an angular velocity detected by applying a second load to said driver; means for recalculating a second entropy of said angular velocity according to the results of classification of said second errors; and means for calculating the relativity between said first entropy and said second entropy. - View Dependent Claims (11)
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Specification