JP2012252632A - Driver monitoring apparatus - Google Patents

Driver monitoring apparatus Download PDF

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JP2012252632A
JP2012252632A JP2011126266A JP2011126266A JP2012252632A JP 2012252632 A JP2012252632 A JP 2012252632A JP 2011126266 A JP2011126266 A JP 2011126266A JP 2011126266 A JP2011126266 A JP 2011126266A JP 2012252632 A JP2012252632 A JP 2012252632A
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acceleration
information
seating
seating pressure
pressure
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Takashi Nakamura
崇 中村
Shigeyuki Iwami
成行 石見
Yuki Masuya
勇希 舛屋
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Nippon Seiki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a driver monitoring apparatus which improves accuracy in state estimation of a driver by eliminating a body motion caused by vehicle travel as a disturbance component and reducing influence due to a deviation of a detection angle generated by a mounting error between an acceleration detection part and a seating pressure detection part.SOLUTION: An acceleration detection part 10 measures an acceleration. Acceleration conversion means 31 uses acceleration measurement information acquired by the acceleration detection part 10 to convert it into acceleration conversion information having acceleration direction information indicating a direction of the acceleration and acceleration size information indicating a size of the acceleration. Multiple seating pressure detection parts 20 are provided on a seating face for detecting a seating pressure applied on the seating face. Seating pressure conversion means 32 uses seating pressure measurement information acquired by the seating pressure detection parts 20 to convert it into seating pressure conversion information having seating pressure transition direction information indicating a transition direction of seating pressure. Acceleration influence determination means 33 determines that a posture change of a driver is a body motion caused by vehicle travel, when the acceleration direction information and the seating pressure transition direction information show almost the same direction.

Description

本発明は、車両の運転者の眠気等による異常な姿勢変化(体動)を検知する運転者監視装置であって、車両本来の走行により生じる加速度契機の姿勢変化を外乱として判定する運転者監視装置に関するものである。   The present invention is a driver monitoring device that detects an abnormal posture change (body motion) due to drowsiness or the like of a vehicle driver, and monitors the driver's posture change of an acceleration trigger caused by the vehicle's original travel as a disturbance. It relates to the device.

運転者が座るシート座面部に複数の圧力センサを備え、前記圧力センサにより、運転者の姿勢を判定し、検知された運転者の姿勢が異常と判断した場合に、警報装置を作動させ、運転者に注意を喚起するシステムが特許文献1等に開示されている。   Provided with a plurality of pressure sensors on the seat seat part where the driver sits, the driver's posture is determined by the pressure sensor, and when the detected driver's posture is determined to be abnormal, an alarm device is activated to drive A system for calling attention to a person is disclosed in Patent Document 1 and the like.

しかしながら、このような圧力センサにより運転者の姿勢を判定する場合、車両の振動や運転者の操作等の外乱により、運転者の眠気・身体異常等の状態検出の精度が低くなるという問題があった。   However, when such a pressure sensor is used to determine the driver's posture, there is a problem that the detection accuracy of the driver's drowsiness / body abnormalities and the like becomes low due to disturbances such as vehicle vibrations and driver operations. It was.

そこで、特許文献2のように、座面及び背面に圧力センサを設置し、運転者の重心点の移動量の積を算出し、この算出された値が閾値を超えたとき、
1)ステアリングに設置された操舵角センサにより得られたステアリング角度が閾値を超えている場合、車両左右方向の加速度が発生していると判断する。
2)また、加速度の大きさが閾値を超えている場合、車両前後方向の加速度が発生していると判断する。
上記の条件1)、2)により加速度が発生していると判断した場合、どのような体動があったとしても運転者の姿勢変化を異常と判定しないことで、車両走行に起因する運転者の姿勢変化を除去し、運転者の姿勢変化の検出精度を上げる技術が開示されている。
Therefore, as in Patent Document 2, pressure sensors are installed on the seating surface and the back surface, the product of the amount of movement of the driver's center of gravity is calculated, and when the calculated value exceeds the threshold value,
1) When the steering angle obtained by the steering angle sensor installed in the steering exceeds the threshold, it is determined that acceleration in the lateral direction of the vehicle is occurring.
2) Further, when the magnitude of the acceleration exceeds the threshold value, it is determined that acceleration in the longitudinal direction of the vehicle is occurring.
When it is determined that the acceleration is generated according to the above conditions 1) and 2), the driver's posture change is not determined to be abnormal regardless of any body movement, so that the driver caused by the vehicle running Is disclosed that removes the change in posture and improves the detection accuracy of the change in posture of the driver.

特開平8−293085号公報JP-A-8-293085 特開平11−326084号公報JP 11-326084 A

しかしながら、このような運転者監視装置は、車両前後方向の加速度と車両左右方向の加速度をそれぞれ別々のアルゴリズムで検出しているので、車両方向に対して斜め(右前、左前、右後、左後)方向の加速度が発生した場合に検出する手段がないという問題点があった。
また、このような運転者監視装置は、加速度の大きさもしくは操舵角センサの値が所定値以上の場合に、圧力センサがどのような体動を検知していても、車両走行に起因する体動であり、異常と判断しない。
さらに、加速度検出部と、座圧検出部とは、アフターパーツ等で搭載される機会があり、このような場合においては、加速度検出部と、座圧検出部の検出角度にずれが生じる恐れがある。図13に加速度検出部10と、座圧検出部20との配置例を示す。図13(a)は理想的な配置であり、図13(b)と図13(c)は、比較例であり、加速度検出部10による加速度方向情報θaと、座圧検出部20により測定された座圧推移方向情報θbにずれが生じ、車両走行に起因する運転者の体動も異常な体動として車両運転者に報知される恐れがあった。
However, such a driver monitoring device detects acceleration in the vehicle front-rear direction and acceleration in the vehicle left-right direction using different algorithms, so that it is oblique to the vehicle direction (right front, left front, right rear, left rear). ) There is a problem that there is no means for detecting when a direction acceleration occurs.
In addition, such a driver monitoring device can detect the body caused by the vehicle running regardless of the body motion detected by the pressure sensor when the magnitude of acceleration or the value of the steering angle sensor is equal to or greater than a predetermined value. It is dynamic and is not judged abnormal.
Furthermore, the acceleration detection unit and the seating pressure detection unit have an opportunity to be mounted with after-parts, etc., and in such a case, there is a risk that the detection angle between the acceleration detection unit and the seating pressure detection unit may be shifted. is there. FIG. 13 shows an arrangement example of the acceleration detection unit 10 and the seat pressure detection unit 20. 13A is an ideal arrangement, and FIG. 13B and FIG. 13C are comparative examples, and are measured by the acceleration direction information θa by the acceleration detection unit 10 and the seat pressure detection unit 20. The seat pressure transition direction information θb may be shifted, and the driver's body motion due to vehicle travel may be reported to the vehicle driver as an abnormal body motion.

本発明は、このような問題に鑑みなされ、圧力検出部による圧力推移方向情報と加速度検出部により測定された加速度方向情報から、車両走行に起因する体動を外乱成分として除去し、また加速度検出部と座圧検出部の取付誤差による検出角度のずれによる影響を軽減することで、運転者の状態推定の精度を向上した運転者監視装置を提供することを目的とする。   This invention is made in view of such a problem, and removes the body movement resulting from vehicle travel as a disturbance component from the pressure transition direction information by the pressure detection unit and the acceleration direction information measured by the acceleration detection unit, and also detects the acceleration. It is an object of the present invention to provide a driver monitoring device that improves the accuracy of the driver's state estimation by reducing the influence of the detection angle shift caused by the mounting error between the seat portion and the seat pressure detection portion.

本発明は、前述した課題を解決するため、請求項1では、加速度を計測する加速度検出部と、前記加速度検出部より得られた加速度計測情報を用いて、加速度の方向を表す加速度方向情報と加速度の大きさを表す加速度大きさ情報とを有する加速度変換情報に変換する加速度変換手段と、
座面に複数備えられ、前記座面に掛かる座圧を検出する座圧検出部と、前記座圧検出部より得られた座圧計測情報を用いて、前記座圧の推移する方向を表す座圧推移方向情報を有する座圧変換情報に変換する座圧変換手段と、
車両運転者に対して加速度の影響の有無を判断する加速度影響判断手段と、を備えた運転者監視装置において、
前記加速度影響判断手段は、前記加速度方向情報と前記座圧推移方向情報が略同方向の場合、車両運転者の姿勢変化が車両走行に起因するものとする車両走行起因体動であると判断するものであり、
斯かる構成により、座圧検出部(圧力センサ)により検出された車両運転者の座圧推移方向情報と、加速度検出部(加速度センサ)により検出された加速度方向情報とにより、車両走行に起因する外乱成分のみを除去し、運転者の状態推定の精度を向上させることができる。
In order to solve the above-described problem, the present invention provides an acceleration detection unit that measures acceleration, and acceleration direction information that represents the direction of acceleration using acceleration measurement information obtained from the acceleration detection unit. Acceleration conversion means for converting into acceleration conversion information having acceleration magnitude information representing the magnitude of acceleration;
A seat provided with a plurality of seating surfaces and detecting a seating pressure applied to the seating surface, and a seating pressure representing the direction in which the seating pressure changes using seating pressure measurement information obtained from the seating pressure detecting unit. A sitting pressure converting means for converting into sitting pressure converting information having pressure transition direction information;
In a driver monitoring device comprising acceleration influence determining means for determining whether or not there is an influence of acceleration on a vehicle driver,
When the acceleration direction information and the seating pressure transition direction information are substantially in the same direction, the acceleration influence determination unit determines that the change in the posture of the vehicle driver is due to vehicle travel caused by vehicle travel. Is,
With such a configuration, the vehicle driver's seat pressure transition direction information detected by the seat pressure detection unit (pressure sensor) and the acceleration direction information detected by the acceleration detection unit (acceleration sensor) are attributed to vehicle travel. Only the disturbance component can be removed, and the accuracy of the driver's state estimation can be improved.

また、請求項2では、前記加速度方向情報と前記座圧推移方向情報との角度誤差を算出する角度誤差算出手段を有するものである。   According to a second aspect of the invention, there is provided angle error calculating means for calculating an angle error between the acceleration direction information and the seat pressure transition direction information.

また、請求項3では、前記角度誤差算出手段は、前記車両が進行を始めたことを判断する車両進行判定手段が前記車両が進行したと判断したとき、前記加速度方向情報と前記座圧推移方向情報との角度の差異を前記角度誤差とするものである。   According to a third aspect of the present invention, when the vehicle error determining means for determining that the vehicle has started traveling determines that the vehicle has traveled, the angle error calculating means determines the acceleration direction information and the seat pressure transition direction. The difference in angle with the information is used as the angle error.

また、請求項4では、前記角度誤差算出手段は、前記車両進行判定手段の初回の進行判定時のみ前記角度誤差を算出するものであり、初回の走行により、精度よく、また簡易な検出設定により、角度の補正を行うことができる。   According to a fourth aspect of the present invention, the angle error calculating means calculates the angle error only at the time of the first time travel determination by the vehicle progress determining means. Angle correction can be performed.

また、請求項5では、前記角度誤差算出手段は、前記角度誤差を前記加速度方向情報または、前記座圧推移方向情報に反映するように設定されているものであり、斯かる構成により、加速度検出部と座圧検出部の取付誤差等による検出角度のずれの影響を除去することで、運転者の状態推定の精度を向上させることができる。   According to a fifth aspect of the present invention, the angle error calculating means is set so as to reflect the angle error in the acceleration direction information or the seat pressure transition direction information. The accuracy of the driver's state estimation can be improved by removing the influence of the shift of the detection angle due to the mounting error between the head portion and the seat pressure detection portion.

また、請求項6では、前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、所定時間における前記座圧推移大きさ情報が最も減少した前記座圧検出部の位置から、同じ時間内における前記座圧推移大きさ情報が最も増加した前記座圧検出部の位置への方向へと設定されるものである。   According to a sixth aspect of the present invention, the seating pressure conversion information includes seating pressure transition magnitude information indicating a magnitude of the seating pressure detection unit that changes at a predetermined time, and the seating pressure transition direction information is obtained at a predetermined time. The seat pressure transition magnitude information is set in a direction from the position of the seat pressure detection section where the seat pressure transition magnitude information has decreased most to the position of the seat pressure detection section where the seat pressure transition magnitude information has increased most in the same time. Is.

また、請求項7では、前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、所定時間における前記座圧推移大きさ情報が減少した前記座圧検出部の平均位置から、同じ時間内における前記座圧推移大きさ情報が増加した前記座圧検出部の平均位置への方向へと設定されるものである。   According to a seventh aspect of the present invention, the seating pressure conversion information includes seating pressure transition magnitude information indicating a magnitude of the seating pressure detection unit that changes at a predetermined time, and the seating pressure transition direction information is obtained at a predetermined time. From the average position of the seating pressure detection unit in which the seating pressure transition magnitude information has decreased, the setting is made in the direction from the average position of the seating pressure detection unit in which the seating pressure transition magnitude information has increased within the same time. Is.

また、請求項8では、前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、複数の前記座圧検出部の中心点から、所定時間における前記座圧推移大きさ情報が最も増加した前記座圧検出部の位置への方向へと設定される、
または、所定時間における前記座圧推移大きさ情報が最も減少した前記座圧検出部の位置から、座圧検出部の中心点への方向へと設定されるものであり、
上記請求項6乃至8の発明により、座圧検出部(圧力センサ)により検出された座圧推移方向情報と、加速度検出部(加速度センサ)により検出された加速度方向情報との比較により、車両走行に起因する外乱成分のみを除去し、運転者の状態推定の精度を向上させることができる。
Further, in claim 8, the seat pressure conversion information includes seat pressure transition magnitude information indicating a magnitude that changes in a predetermined time of the seat pressure detector, and the seat pressure transition direction information includes a plurality of the seat pressure transition direction information. From the center point of the seating pressure detection unit, the seating pressure transition magnitude information in a predetermined time is set in the direction toward the position of the seating pressure detection unit that has increased most.
Alternatively, the seating pressure transition magnitude information in a predetermined time is set in the direction from the position of the seating pressure detecting unit where the seating pressure detecting unit is the smallest to the center point of the seating pressure detecting unit,
According to the sixth to eighth aspects of the present invention, the vehicle travels by comparing the seat pressure transition direction information detected by the seat pressure detector (pressure sensor) with the acceleration direction information detected by the acceleration detector (acceleration sensor). Thus, only the disturbance component due to the noise can be removed, and the accuracy of the driver's state estimation can be improved.

また、請求項9では、前記加速度変換手段は、加速度の方向を加速度角度区画に分類し、前記座圧変換手段は、座圧推移の方向を座圧角度区画に分類し、
前記加速度影響判断手段は、前記加速度角度区画と前記座圧角度区画が同じもしくは、その隣同士の区画であれば、車両運転者の姿勢変化が車両走行に起因するものとする車両走行起因体動であると判断するものであり、
斯かる構成により、座圧検出部(圧力センサ)により検出された車両運転者の座圧推移方向情報と、加速度検出部(加速度センサ)により検出された加速度方向情報との測定誤差や計算誤差の影響を加味しながら外乱成分を除去し、運転者の状態推定の精度を向上させることができる。
Further, in claim 9, the acceleration conversion means classifies the direction of acceleration into an acceleration angle section, and the seat pressure conversion means classifies the direction of seat pressure transition into a seat pressure angle section,
When the acceleration angle section and the seating pressure angle section are the same or adjacent to each other, the acceleration influence determining means determines that the vehicle driver's posture change is caused by vehicle travel. It is judged that
With such a configuration, measurement errors and calculation errors between the vehicle driver's sitting pressure transition direction information detected by the sitting pressure detection unit (pressure sensor) and the acceleration direction information detected by the acceleration detection unit (acceleration sensor) are reduced. The disturbance component can be removed while taking the influence into account, and the accuracy of the driver's state estimation can be improved.

また、請求項10では、前記座圧変換情報より車両運転者の状態が異常か、否かを判定する状態判定部を有し、前記状態判定部が前記車両運転者の状態を異常と判定し、かつ前記加速度影響判断手段が、車両運転者の姿勢変化が車両走行起因体動ではないと判断した際、運転者に異常姿勢であることを報知する警告部を有するものであり、斯かる構成により、車両運転者の姿勢異常を車両運転者に報知し、注意を喚起することができる。   According to a tenth aspect of the present invention, there is provided a state determination unit that determines whether or not the vehicle driver's state is abnormal based on the seat pressure conversion information, and the state determination unit determines that the vehicle driver's state is abnormal. And when the said acceleration influence judgment means judges that a vehicle driver's attitude | position change is not a vehicle driving | running | working body motion, it has a warning part which alert | reports to a driver | operator that it is an abnormal attitude | position, Such a structure Thus, it is possible to notify the vehicle driver of the abnormal posture of the vehicle driver and call attention.

本発明は、圧力検出部による圧力推移方向情報と加速度検出部により測定された加速度方向情報から、車両走行に起因する体動を外乱成分として除去し、また加速度検出部と座圧検出部の取付誤差による検出角度のずれによる影響を軽減することで、運転者の状態推定の精度を向上した運転者監視装置を提供する。   The present invention eliminates body movements caused by vehicle travel as disturbance components from the pressure transition direction information by the pressure detection unit and the acceleration direction information measured by the acceleration detection unit, and attaches the acceleration detection unit and the seat pressure detection unit. Provided is a driver monitoring device that improves the accuracy of a driver's state estimation by reducing the influence of a detection angle shift caused by an error.

本発明に係る運転者監視装置のブロック構成図Block configuration diagram of a driver monitoring device according to the present invention 上記発明に係る加速度検出部の加速度変換情報を示した図であり、(a)は車両に対する加速度検出部の配置の一実施例であり、(b)は加速度計測情報を加速度方向情報と加速度大きさ情報に変換した際のベクトル図It is the figure which showed the acceleration conversion information of the acceleration detection part which concerns on the said invention, (a) is one Example of arrangement | positioning of the acceleration detection part with respect to a vehicle, (b) is acceleration direction information and acceleration magnitude | size. Vector diagram when converted to information 上記発明に係る座圧検出部を座面に配置した際の配置例Arrangement example when the seat pressure detector according to the invention is arranged on the seat surface 上記発明に係る座圧検出部の配置図Arrangement of seat pressure detector according to the invention 上記発明に係る座圧検出部の座圧計測情報の時間変化における説明図Explanatory drawing in the time change of the seating pressure measurement information of the seating pressure detection part which concerns on the said invention. 上記発明に係る座圧推移方向情報への変換例であり、(a)は座圧検出部の配置例であり、(b)は座圧推移方向情報を第一実施形態で算出した例であり、(c)は座圧推移方向情報を第二実施形態で算出した例であり、(d)は座圧推移方向情報を第三実施形態で算出した例であるIt is the conversion example to the seat pressure transition direction information which concerns on the said invention, (a) is an example of arrangement | positioning of a seat pressure detection part, (b) is the example which calculated the seat pressure transition direction information in 1st embodiment. (C) is an example which calculated seat pressure transition direction information in 2nd embodiment, (d) is an example which calculated seat pressure transition direction information in 3rd embodiment. 上記発明に係る座圧推移方向情報への変換例であり、(a)は座圧検出部の配置例であり、(b)は座圧推移方向情報を第一実施形態で算出した例であり、(c)は座圧推移方向情報を第二実施形態で算出した例であり、(d)は座圧推移方向情報を第三実施形態で算出した例であるIt is the conversion example to the seat pressure transition direction information which concerns on the said invention, (a) is an example of arrangement | positioning of a seat pressure detection part, (b) is the example which calculated the seat pressure transition direction information in 1st embodiment. (C) is an example which calculated seat pressure transition direction information in 2nd embodiment, (d) is an example which calculated seat pressure transition direction information in 3rd embodiment. 上記発明に係る座圧推移方向情報への変換例であり、(a)は座圧検出部の配置例であり、(b)は座圧推移方向情報を第一実施形態で算出した例であり、(c)は座圧推移方向情報を第二実施形態で算出した例であり、(d)は座圧推移方向情報を第三実施形態で算出した例であるIt is the conversion example to the seat pressure transition direction information which concerns on the said invention, (a) is an example of arrangement | positioning of a seat pressure detection part, (b) is the example which calculated the seat pressure transition direction information in 1st embodiment. (C) is an example which calculated seat pressure transition direction information in 2nd embodiment, (d) is an example which calculated seat pressure transition direction information in 3rd embodiment. 上記発明に係る座圧推移方向情報への変換例であり、(a)は座圧検出部の配置例であり、(b)は座圧推移方向情報を第一実施形態で算出した例であり、(c)は座圧推移方向情報を第二実施形態で算出した例であり、(d)は座圧推移方向情報を第三実施形態で算出した例であるIt is the conversion example to the seat pressure transition direction information which concerns on the said invention, (a) is an example of arrangement | positioning of a seat pressure detection part, (b) is the example which calculated the seat pressure transition direction information in 1st embodiment. (C) is an example which calculated seat pressure transition direction information in 2nd embodiment, (d) is an example which calculated seat pressure transition direction information in 3rd embodiment. 上記発明における加速度方向情報と座圧推移方向情報の方向成分を複数の角度区画に分類した第四実施形態における説明図Explanatory drawing in 4th embodiment which classified the direction component of the acceleration direction information and seat pressure transition direction information in the said invention into the several angle division. 上記発明における加速度方向情報と座圧推移方向情報の方向成分を複数種の角度区画に分類した第五実施形態における説明図Explanatory drawing in 5th embodiment which classified the direction component of the acceleration direction information in the said invention, and the seat pressure transition direction information into several types of angle divisions. 上記発明における加速度方向情報と座圧推移方向情報の方向成分を複数の角度区画に分類した際の加速度影響判断手段の判断例Judgment example of acceleration influence judging means when directional components of acceleration direction information and sitting pressure transition direction information in the above invention are classified into a plurality of angle sections 上記発明における加速度方向情報と座圧推移方向情報との角度誤差の説明図Explanatory diagram of angular error between acceleration direction information and seat pressure transition direction information in the above invention

以下、添付図面に基づいて、一実施形態に係わる運転者監視装置について説明する。
図1は本発明に係る運転者監視装置100のブロック構成図であり、運転者監視装置100は、加速度検出部10と、座圧検出部20と、制御部30と、警告部40と、を備える。
Hereinafter, based on an accompanying drawing, a driver monitoring device concerning one embodiment is explained.
FIG. 1 is a block configuration diagram of a driver monitoring device 100 according to the present invention. The driver monitoring device 100 includes an acceleration detection unit 10, a seat pressure detection unit 20, a control unit 30, and a warning unit 40. Prepare.

図2は、車両に対する加速度検出部10の配置の一実施例であり、加速度検出部10は、車両水平方向と平行である第一加速度成分αxと、第二加速度成分αyとを有する加速度計測情報を検出する。
これらの加速度計測情報(第一加速度成分αxと、第二加速度成分αy)は、後述する加速度変換手段31にて、加速度方向情報θaと、加速度大きさ情報Aに変換される。
FIG. 2 shows an example of the arrangement of the acceleration detection unit 10 with respect to the vehicle. The acceleration detection unit 10 includes acceleration measurement information having a first acceleration component αx and a second acceleration component αy parallel to the vehicle horizontal direction. Is detected.
These pieces of acceleration measurement information (first acceleration component αx and second acceleration component αy) are converted into acceleration direction information θa and acceleration magnitude information A by acceleration conversion means 31 described later.

図3は、座圧検出部20を車両のシート座面210に配置した際の一実施例であり、
図4は、座圧検出部20を車両のシート座面210に配置した際の上面図である。
座圧検出部20は、2次元の座圧方向(第一座圧方向成分βx、第二座圧方向成分βy)を検出するために少なくとも3個の第一乃至第三座圧検出部20a〜20cにより構成され、それぞれがシート座面210に働く座圧計測情報を計測し、この座圧計測情報を制御部30に出力する。
FIG. 3 is an example when the seat pressure detecting unit 20 is arranged on the seat seat surface 210 of the vehicle.
FIG. 4 is a top view when the seat pressure detector 20 is disposed on the seat seat surface 210 of the vehicle.
The seat pressure detection unit 20 includes at least three first to third seat pressure detection units 20a to 20a to detect a two-dimensional seat pressure direction (first seat pressure direction component βx, second seat pressure direction component βy). 20c, each of which measures the sitting pressure measurement information acting on the seat seat surface 210, and outputs this sitting pressure measurement information to the control unit 30.

制御部30は、加速度変換手段31と、座圧変換手段32と、加速度影響判断手段33と、状態判定部34と、を備える。   The control unit 30 includes an acceleration conversion unit 31, a seat pressure conversion unit 32, an acceleration influence determination unit 33, and a state determination unit 34.

加速度変換手段31は、前記加速度検出部10より、出力された第一加速度成分αxと、第二加速度成分αyとから式1、2に表すように加速度方向情報θaと、加速度大きさ情報Aに変換する。

Figure 2012252632
・・・(式1)
Figure 2012252632
Figure 2012252632
・・・(式2) The acceleration conversion means 31 converts the acceleration direction information θa and the acceleration magnitude information A from the first acceleration component αx and the second acceleration component αy output from the acceleration detection unit 10 as shown in equations 1 and 2. Convert.
Figure 2012252632
... (Formula 1)
Figure 2012252632
Figure 2012252632
... (Formula 2)

座圧変換手段32は、座圧検出部20より出力された座圧計測情報から後述する運転者体動情報と、座圧推移方向情報θbと、を有する座圧変換情報を算出する。   The seat pressure conversion means 32 calculates seat pressure conversion information having driver body movement information, which will be described later, and seat pressure transition direction information θb, from the seat pressure measurement information output from the seat pressure detector 20.

加速度影響判断手段33は、加速度方向情報θaと座圧推移方向情報θbとを比較し、加速度方向情報θa±30°の範囲内に座圧推移方向情報θbが含まれている場合、座圧検出部20により検出された運転者の体動が車両走行に起因する体動である車両走行起因体動であると判断する。   The acceleration influence determination means 33 compares the acceleration direction information θa and the sitting pressure transition direction information θb, and if the sitting pressure transition direction information θb is included in the range of the acceleration direction information θa ± 30 °, the sitting pressure detection is performed. It is determined that the driver's body motion detected by the unit 20 is a vehicle travel-induced body motion that is a body motion resulting from vehicle travel.

状態判定部34は、座圧検出部20から出力される座圧計測情報から、車両運転者の体動が異常であるかを判断する。   The state determination unit 34 determines whether the body movement of the vehicle driver is abnormal from the sitting pressure measurement information output from the sitting pressure detection unit 20.

警告部40は、前記のように状態判定部34が車両運転者の体動が異常であるとした際に、車両運転車にスピーカーやブザー等の発音手段40aの出力する音声にて運転者に報知するが、加速度影響判断手段33が運転者の体動を車両走行起因体動であると判断した際は、警告部40は警告を行わない。
しかし、状態推定部34が車両運転者の体動が異常であり、かつ加速度影響判断手段33が運転者の体動を車両走行起因体動であると判断したとき、警告部40は、発音手段40a等に、車両運転者に体動が異常であることを報知させ、車両のインストルメントパネルやカーナビ等の表示部40bに運転者の体動が車両走行起因体動であることを表示させてもよい。
As described above, when the state determination unit 34 determines that the body movement of the vehicle driver is abnormal, the warning unit 40 informs the driver by the sound output from the sound generation means 40a such as a speaker or a buzzer. When the acceleration influence determination means 33 determines that the driver's body movement is a body movement-induced body movement, the warning unit 40 does not give a warning.
However, when the state estimation unit 34 determines that the body movement of the vehicle driver is abnormal and the acceleration influence determination unit 33 determines that the body movement of the driver is a vehicle movement-induced body movement, the warning unit 40 40a, etc., inform the vehicle driver that the body movement is abnormal, and display on the display unit 40b of the vehicle instrument panel, car navigation system, etc., that the body movement of the driver is a body movement-induced body movement. Also good.

以上の構成からなる運転者監視装置100の動作を簡潔に述べれば、
(1)加速度変換手段31は、前記加速度検出部10より得られた加速度計測情報から加速度方向情報θaと、加速度大きさ情報Aとを算出する。
(2)座圧変換手段32は、座圧検出部20より出力された座圧計測情報から運転者体動情報と座圧推移方向情報θbを算出する。
(3)状態判定部34は、運転者体動情報が異常であると判断した際、警告部40に体動異常信号を出力し、運転者に注意を喚起させる。
(4)加速度影響判断手段33は、前記加速度方向情報θaと前記座圧推移方向情報θbが略同一方向の場合、上記運転者体動情報が車両走行起因体動であると判断し、状態判定部34に体動異常信号を出力させない。
To briefly describe the operation of the driver monitoring device 100 configured as described above,
(1) The acceleration conversion means 31 calculates acceleration direction information θa and acceleration magnitude information A from the acceleration measurement information obtained from the acceleration detector 10.
(2) The seat pressure conversion means 32 calculates the driver body movement information and the seat pressure transition direction information θb from the seat pressure measurement information output from the seat pressure detector 20.
(3) When the state determination unit 34 determines that the driver body movement information is abnormal, the state determination unit 34 outputs a body movement abnormality signal to the warning unit 40 to alert the driver.
(4) If the acceleration direction information θa and the seat pressure transition direction information θb are substantially in the same direction, the acceleration influence determination unit 33 determines that the driver body movement information is a body movement-induced body movement, and determines the state. The body movement abnormal signal is not output to the unit 34.

以下、本実施形態の座圧推移方向情報について、図5乃至図12を参照して説明する。   Hereinafter, the seat pressure transition direction information of the present embodiment will be described with reference to FIGS. 5 to 12.

<座圧推移方向情報>
図5は、座圧検出部の座圧計測情報の時間変化の計測結果の説明図であり、(G11)は、座圧計測情報の時間変化が増加傾向にある場合の例であり、(G12)は、増加傾向にあるものの変化量が少ないものであり、
(G21)は、減少傾向にある場合の例であり、(G22)は減少傾向にあるものの変化量が少ないものであり、
(G31,G32)は、増加傾向、減少傾向に属さない座圧変化が少ない例と、ノイズの例を示した図である。
<Seat pressure transition direction information>
FIG. 5 is an explanatory diagram of the measurement result of the time change of the seat pressure measurement information of the seat pressure detection unit, and (G11) is an example in the case where the time change of the seat pressure measurement information tends to increase, (G12 ) Is an increasing trend but a small change,
(G21) is an example in the case of a declining trend, (G22) is a declining trend but a small amount of change,
(G31, G32) is a diagram showing an example of a small change in sitting pressure that does not belong to an increasing tendency or a decreasing tendency, and an example of noise.

(第一実施形態)
図6(b)は、座圧推移方向情報θbを、座圧推移大きさ情報が最も減少した座圧検出部の位置から座圧推移大きさ情報が最も増加した座圧検出部の位置の方向へと設定した際の図である。図6においては、座圧推移大きさ情報が最も減少した座圧検出部の位置が座圧検出部20aであり、座圧推移大きさ情報が最も増加した座圧検出部の位置が座圧検出部20dなので、座圧推移方向情報θbは、約135°と算出される。
(First embodiment)
FIG. 6B shows the direction of the seat pressure transition direction information θb from the position of the seat pressure detection section where the seat pressure transition magnitude information has decreased most to the position of the seat pressure detection section where the seat pressure transition magnitude information has increased most. It is a figure at the time of setting to. In FIG. 6, the position of the seat pressure detection unit 20a where the seat pressure transition magnitude information has decreased most is the seat pressure detection unit 20a, and the position of the seat pressure detection unit where the seat pressure transition magnitude information has increased most is the seat pressure detection. Since it is the portion 20d, the seating pressure transition direction information θb is calculated to be about 135 °.

図7(b)の座圧検出部の配置において、座圧推移大きさ情報が最も減少した座圧検出部の位置が座圧検出部21cであり、座圧推移大きさ情報が最も増加した座圧検出部の位置が座圧検出部21bなので、座圧推移方向情報θbは、約180°と算出される。   In the arrangement of the seating pressure detection unit in FIG. 7B, the seating pressure detection unit 21c has the seating pressure detection unit 21c where the seating pressure transition magnitude information has decreased most, and the seating pressure transition magnitude information has the largest increase in seating. Since the position of the pressure detector is the seat pressure detector 21b, the seat pressure transition direction information θb is calculated to be about 180 °.

図8(b)の座圧検出部の配置において、座圧推移大きさ情報が最も減少した座圧検出部の位置が座圧検出部22cであり、座圧推移大きさ情報が最も増加した座圧検出部の位置が座圧検出部22gなので、座圧推移方向情報θbは、約248°と算出される。   In the arrangement of the seating pressure detection unit in FIG. 8B, the seating pressure detection unit 22c is the seating pressure detection unit where the seating pressure transition magnitude information is the smallest, and the seating pressure transition magnitude information is the largest. Since the position of the pressure detector is the seat pressure detector 22g, the seat pressure transition direction information θb is calculated to be about 248 °.

図9(b)の座圧検出部の配置において、座圧推移大きさ情報が最も減少した座圧検出部の位置が座圧検出部23aであり、座圧推移大きさ情報が最も増加した座圧検出部の位置が座圧検出部23bなので、座圧推移方向情報θbは、約0°と算出される。   In the arrangement of the seat pressure detection unit in FIG. 9B, the seat pressure detection unit 23a is the seat pressure detection unit where the seat pressure transition magnitude information is the smallest, and the seat pressure transition magnitude information is the largest. Since the position of the pressure detector is the seat pressure detector 23b, the seat pressure transition direction information θb is calculated to be about 0 °.

(第二実施形態)
図6(c)は、座圧推移方向情報を、座圧推移大きさ情報が減少した座圧検出部の平均位置から座圧推移大きさ情報が増加した座圧検出部の平均位置の方向へと設定した際の図である。図6においては、座圧推移大きさ情報が減少した座圧検出部の位置が座圧検出部20dのみであるので減少した座圧検出部の平均位置は20dとなり、座圧推移大きさ情報が増加した座圧検出部の位置が20a,20bであるので増加した座圧検出部の平均位置はP1となり、座圧推移方向情報θbは、約120°と算出される。(座圧検出部の他配置例については、図7(c)、図8(c)、図9(c)を参照)
(Second embodiment)
In FIG. 6C, the seating pressure transition direction information is changed from the average position of the seating pressure detection unit where the seating pressure transition magnitude information is decreased to the direction of the average position of the seating pressure detection unit where the seating pressure transition magnitude information is increased. It is a figure at the time of setting. In FIG. 6, since the position of the seat pressure detection unit where the seat pressure transition magnitude information is decreased is only the seat pressure detection unit 20 d, the average position of the reduced seat pressure detection unit is 20 d, and the seat pressure transition magnitude information is Since the increased position of the seat pressure detector is 20a and 20b, the average position of the increased seat pressure detector is P1, and the seat pressure transition direction information θb is calculated to be about 120 °. (Refer to FIG. 7C, FIG. 8C, and FIG. 9C for other arrangement examples of the seat pressure detection unit)

(第三実施形態)
図6(d)は、座圧推移方向情報を、座圧検出部20の中心点Oから、所定時間における座圧推移大きさ情報が最も増加した座圧検出部G11の位置への方向へと設定した際の説明図である。図6においては、座圧推移大きさ情報が最も増加した座圧検出部の位置が座圧検出部20dなので、座圧推移方向情報θbは、約135°と算出される。
または、上記では、「座圧推移方向情報を、座圧検出部20の中心点Oから、所定時間における座圧推移大きさ情報が最も増加した座圧検出部の位置への方向へと設定」としたが、座圧推移方向情報を、所定時間における座圧推移大きさ情報が最も減少した座圧検出部G21の位置から、座圧検出部の中心点Oへの方向へと設定してもよい。(座圧検出部の他配置例については、図7(d)、図8(d)、図9(d)を参照)
(Third embodiment)
FIG. 6D shows the seating pressure transition direction information from the center point O of the seating pressure detection unit 20 to the direction of the seating pressure detection unit G11 where the seating pressure transition magnitude information has increased most during a predetermined time. It is explanatory drawing at the time of setting. In FIG. 6, the position of the seat pressure detection unit where the seat pressure transition magnitude information has increased most is the seat pressure detection unit 20d, and therefore the seat pressure transition direction information θb is calculated to be about 135 °.
Or, in the above, “setting the seating pressure transition direction information from the center point O of the seating pressure detection unit 20 toward the position of the seating pressure detection unit where the seating pressure transition magnitude information has increased most in a predetermined time”. However, even if the seating pressure transition direction information is set from the position of the seating pressure detection unit G21 where the seating pressure transition magnitude information has decreased most in a predetermined time to the direction toward the center point O of the seating pressure detection unit. Good. (Refer to FIG. 7 (d), FIG. 8 (d), and FIG. 9 (d) for other arrangement examples of the seating pressure detection unit)

(第四実施形態)
上記実施形態では、「加速度変換手段31は加速度方向情報θaとを算出し、座圧変換手段32は座圧推移方向情報θbを算出し、加速度影響判断手段33は、加速度方向情報θaと座圧推移方向情報θbとを比較する」とあるが、図10に示すように、加速度変換手段31は、加速度計測情報より、加速度の方向を複数の加速度角度区画に分類し、座圧変換手段32は、座圧計測情報より、座圧推移の方向を座圧角度区画に分類し、加速度影響判断手段33は、上記の加速度角度区画と座圧角度区画が略同じもしくは、その隣の区画であれば、加速度影響判断手段33は、座圧検出部20により検出された運転者体動情報が車両走行に起因する体動である車両走行起因体動であると判断する。
(Fourth embodiment)
In the above embodiment, “acceleration conversion means 31 calculates acceleration direction information θa, seat pressure conversion means 32 calculates seat pressure transition direction information θb, and acceleration influence determination means 33 determines acceleration direction information θa and seat pressure. As shown in FIG. 10, the acceleration conversion means 31 classifies the direction of acceleration into a plurality of acceleration angle sections based on the acceleration measurement information, and the seat pressure conversion means 32 From the sitting pressure measurement information, the direction of the sitting pressure is classified into the sitting pressure angle section, and the acceleration influence determining means 33 is the same as or adjacent to the acceleration angle section and the sitting pressure angle section. The acceleration influence determination means 33 determines that the driver body motion information detected by the seat pressure detection unit 20 is a vehicle travel-induced body motion that is a body motion resulting from the vehicle travel.

例えば、加速度角度区画がA2であった場合、図10に示すように座圧角度区画がA1、A2、A3であれば、加速度影響判断手段33は、車両走行起因体動であると判断し、座圧角度区画がA4乃至A8であれば、加速度影響判断手段33は、車両走行起因体動であると判断しない。   For example, if the acceleration angle section is A2, as shown in FIG. 10, if the seat pressure angle section is A1, A2, A3, the acceleration influence determination means 33 determines that the body movement is due to vehicle travel, If the seating pressure angle section is A4 to A8, the acceleration influence determination means 33 does not determine that the body movement is caused by body movement.

(第五実施形態)
また、図11に示すように、角度区画を複数種設けてもよい。この場合は、例えば、加速度角度区画がA2であった場合、座圧角度区画がB23、A2、B12であれば、加速度影響判断手段33は、車両走行起因体動であると判断し、座圧角度区画がそれ以外であれば、加速度影響判断手段33は、車両走行起因体動であると判断しない。角度区画に分類した際の加速度影響判断手段33の判断例を図12の表に整理した。表における○記号は、加速度影響判断手段33が車両走行起因体動であると判断し、表における×記号は、加速度影響判断手段33が車両走行起因体動であると判断しないことを示す。
(Fifth embodiment)
Moreover, as shown in FIG. 11, you may provide multiple types of angle divisions. In this case, for example, if the acceleration angle section is A2, and if the seating pressure angle section is B23, A2, B12, the acceleration influence determination means 33 determines that the body movement is caused by the body movement, and the seating pressure If the angular section is other than that, the acceleration influence determination means 33 does not determine that the body movement is caused by vehicle travel. The determination example of the acceleration influence determination means 33 when classified into the angle sections is organized in the table of FIG. The symbol “◯” in the table indicates that the acceleration influence determination means 33 determines that the body movement is caused by vehicle travel, and the symbol “X” in the table indicates that the acceleration effect determination means 33 does not determine that the movement is due to vehicle travel.

以下、本実施形態の角度誤差算出手段について、図13を参照して説明する。   Hereinafter, the angle error calculation means of this embodiment will be described with reference to FIG.

<角度誤差算出手段>
図13は、加速度検出部10と座圧検出部20とを配置した際の角度誤差を示した図であり、図13(a)は、加速度検出部10の車両と、第一加速度成分αx、第二加速度成分αyとの位置関係を表した図であり、図13(b)は座圧検出部20のシート座面210に配置した際の上面図であり、図13(c)は加速度方向情報θaと座面推移方向情報θbとの関係を示した図である。
<Angle error calculation means>
FIG. 13 is a diagram illustrating an angular error when the acceleration detection unit 10 and the seat pressure detection unit 20 are arranged. FIG. 13A illustrates the vehicle of the acceleration detection unit 10, the first acceleration component αx, FIG. 13B is a diagram illustrating a positional relationship with the second acceleration component αy, FIG. 13B is a top view when the seat pressure detection unit 20 is disposed on the seat seat surface 210, and FIG. 13C is an acceleration direction. It is the figure which showed the relationship between information (theta) a and seat surface transition direction information (theta) b.

加速度検出部10と座圧検出部20とは、アフターパーツとして、車両に備えられることもあり、図13(a2)、図13(b3)のように角度がずれることがある。この場合、図13(c2)、図13(c3)のように、加速度方向情報θaと座圧推移方向情報θbとで検出角度の誤差が生じる。このことにより、加速度影響判断手段33が、加速度方向情報θaと座圧推移方向情報θbを略同方向であると判断しない恐れがある。   The acceleration detection unit 10 and the seat pressure detection unit 20 may be provided in the vehicle as after-parts, and the angles may shift as shown in FIGS. 13 (a2) and 13 (b3). In this case, as shown in FIGS. 13 (c2) and 13 (c3), an error in detection angle occurs between the acceleration direction information θa and the seat pressure transition direction information θb. As a result, the acceleration influence determination means 33 may not determine that the acceleration direction information θa and the sitting pressure transition direction information θb are substantially in the same direction.

よって、制御部30は、このような誤差角度φを検出する角度誤差算出手段45を備えてもよい。制御部30が車両ECU300からIGN−ON後の最初の走行(前進)を検出すると、角度誤差算出手段45は、加速度方向情報θaと座圧推移方向情報θbを比較し、誤差角度φを求め、この誤差角度φにより加速度方向情報θaもしくは、座圧推移方向情報θbを補正する。   Therefore, the control unit 30 may include angle error calculation means 45 that detects such an error angle φ. When the control unit 30 detects the first traveling (advance) after the IGN-ON from the vehicle ECU 300, the angle error calculation means 45 compares the acceleration direction information θa and the seat pressure transition direction information θb to obtain the error angle φ, The acceleration direction information θa or the sitting pressure transition direction information θb is corrected by the error angle φ.

斯かる構成により、加速度検出部10と座圧検出部20とをアフターパーツとして装着した際の設置による加速度方向情報θaと座圧推移方向情報θbとの角度誤差φを補正し、加速度影響判断手段33がより正確に車両走行起因体動であるか、否かの判断を行うことができる。また、角度誤差算出手段45は、IGN−ON後の最初の走行時(前進)に検出加速度方向情報θaと座圧推移方向情報θbとを比較することで、測定誤差の生じにくい前進時に加速度方向情報θaと座圧推移方向情報θbを測定し、より正確な角度誤差φを検出することができる。   With such a configuration, the angular error φ between the acceleration direction information θa and the seating pressure transition direction information θb due to the installation when the acceleration detection unit 10 and the seating pressure detection unit 20 are mounted as after-parts is corrected, and the acceleration influence determination unit It can be determined whether or not 33 is a vehicle movement-induced body motion more accurately. In addition, the angle error calculating means 45 compares the detected acceleration direction information θa and the seating pressure transition direction information θb during the first travel after the IGN-ON (forward movement), so that the acceleration direction during forward movement is less likely to cause a measurement error. The information θa and the seat pressure transition direction information θb can be measured to detect a more accurate angle error φ.

100 運転者監視装置
10 加速度検出部
20,21,22,23 座圧検出部
30 制御部
31 加速度変換手段
32 座圧変換手段
33 加速度影響判断手段
34 状態判定手段
35 角度誤差算出手段
36 車両進行判定手段
40 警告部
40a 発音手段
40b 表示手段
200 シート
210 シート座面
220 シート背面
300 車両ECU
500 車両
θa 加速度方向情報
θb 座圧推移方向情報
φ 角度誤差
A 加速度大きさ情報
O 中心点
αx 第一加速度成分
αy 第二加速度成分
βx 第一座圧方向成分
βy 第二座圧方向成分

DESCRIPTION OF SYMBOLS 100 Driver monitoring apparatus 10 Acceleration detection part 20, 21, 22, 23 Seat pressure detection part 30 Control part 31 Acceleration conversion means 32 Seat pressure conversion means 33 Acceleration influence determination means 34 State determination means 35 Angle error calculation means 36 Vehicle progress determination Means 40 Warning section 40a Sound generation means 40b Display means 200 Seat 210 Seat seat surface 220 Seat back surface 300 Vehicle ECU
500 Vehicle θa Acceleration direction information θb Seat pressure transition direction information φ Angle error A Acceleration magnitude information O Center point αx First acceleration component αy Second acceleration component βx First seat pressure direction component βy Second seat pressure direction component

Claims (10)

加速度を計測する加速度検出部と、前記加速度検出部より得られた加速度計測情報を用いて、加速度の方向を表す加速度方向情報と加速度の大きさを表す加速度大きさ情報とを有する加速度変換情報に変換する加速度変換手段と、
座面に複数備えられ、前記座面に掛かる座圧を検出する座圧検出部と、前記座圧検出部より得られた座圧計測情報を用いて、前記座圧の推移する方向を表す座圧推移方向情報を有する座圧変換情報に変換する座圧変換手段と、
車両運転者に対して加速度の影響の有無を判断する加速度影響判断手段と、を備えた運転者監視装置において、
前記加速度影響判断手段は、前記加速度方向情報と前記座圧推移方向情報が略同方向の場合、車両運転者の姿勢変化が車両走行に起因するものとする車両走行起因体動であると判断すること、を特徴とする運転者監視装置。
Acceleration conversion information having an acceleration detection unit that measures acceleration and acceleration direction information that represents the direction of acceleration and acceleration magnitude information that represents the magnitude of acceleration using acceleration measurement information obtained from the acceleration detection unit. Acceleration conversion means for converting;
A seat provided with a plurality of seating surfaces and detecting a seating pressure applied to the seating surface, and a seating pressure representing the direction in which the seating pressure changes using seating pressure measurement information obtained from the seating pressure detecting unit. A sitting pressure converting means for converting into sitting pressure converting information having pressure transition direction information;
In a driver monitoring device comprising acceleration influence determining means for determining whether or not there is an influence of acceleration on a vehicle driver,
When the acceleration direction information and the seating pressure transition direction information are substantially in the same direction, the acceleration influence determination unit determines that the change in the posture of the vehicle driver is due to vehicle travel caused by vehicle travel. A driver monitoring device characterized by that.
前記加速度方向情報と前記座圧推移方向情報との角度誤差を算出する角度誤差算出手段を有すること、を特徴とする請求項1に記載の運転者監視装置。   The driver monitoring apparatus according to claim 1, further comprising an angle error calculating unit that calculates an angle error between the acceleration direction information and the seat pressure transition direction information. 前記角度誤差算出手段は、前記車両が進行を始めたことを判断する車両進行判定手段が、前記車両が進行したと判断したとき、前記加速度方向情報と前記座圧推移方向情報との角度の差異を前記角度誤差とすること、を特徴とする請求項2に記載の運転者監視装置。   The angle error calculation means determines the difference in angle between the acceleration direction information and the seat pressure transition direction information when the vehicle advancement determination means for determining that the vehicle has started traveling determines that the vehicle has traveled. The driver monitoring device according to claim 2, wherein the angle error is defined as the angle error. 前記角度誤差算出手段は、前記車両進行判定手段の初回の進行判定時のみ前記角度誤差を算出すること、を特徴とする請求項3に記載の運転者監視装置。   The driver monitoring apparatus according to claim 3, wherein the angle error calculation unit calculates the angle error only when the vehicle progress determination unit determines the first progress. 前記角度誤差算出手段は、前記角度誤差を前記加速度方向情報または、前記座圧推移方向情報に反映するように設定されていること、を特徴とする請求項2乃至4のいずれかに記載の運転者監視装置。   The driving according to any one of claims 2 to 4, wherein the angle error calculating means is set to reflect the angle error in the acceleration direction information or the seat pressure transition direction information. Monitoring device. 前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、所定時間における前記座圧推移大きさ情報が最も減少した前記座圧検出部の位置から、同じ時間内における前記座圧推移大きさ情報が最も増加した前記座圧検出部の位置への方向へと設定されること、を特徴とする請求項1乃至5のいずれかに記載の運転者監視装置。   The seating pressure conversion information includes seating pressure transition magnitude information indicating the magnitude of the seating pressure detection unit that changes at a predetermined time, and the seating pressure transition direction information is the seating pressure transition magnitude information at a predetermined time. The seating pressure transition magnitude information in the same time is set in the direction from the position of the seating pressure detection unit that is most decreased to the position of the seating pressure detection unit that is the most increased. Item 6. The driver monitoring device according to any one of Items 1 to 5. 前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、所定時間における前記座圧推移大きさ情報が減少した前記座圧検出部の平均位置から、同じ時間内における前記座圧推移大きさ情報が増加した前記座圧検出部の平均位置への方向へと設定されること、を特徴とする請求項1乃至5のいずれかに記載の運転者監視装置。   The seating pressure conversion information includes seating pressure transition magnitude information indicating the magnitude of the seating pressure detection unit that changes at a predetermined time, and the seating pressure transition direction information is the seating pressure transition magnitude information at a predetermined time. The average position of the seating pressure detection unit in which the seating pressure has decreased is set in a direction from the average position of the seating pressure detection unit in the same time to the average position of the seating pressure detection unit. Item 6. The driver monitoring device according to any one of Items 1 to 5. 前記座圧変換情報は、前記座圧検出部の所定時間に変化する大きさを表す座圧推移大きさ情報を有し、前記座圧推移方向情報は、複数の前記座圧検出部の中心点から、所定時間における前記座圧推移大きさ情報が最も増加した前記座圧検出部の位置への方向へと設定される、
または、所定時間における前記座圧推移大きさ情報が最も減少した前記座圧検出部の位置から、座圧検出部の中心点への方向へと設定されること、を特徴とする請求項1乃至5のいずれかに記載の運転者監視装置。
The seating pressure conversion information includes seating pressure transition magnitude information indicating a magnitude of the seating pressure detection unit that changes during a predetermined time, and the seating pressure transition direction information is a center point of the plurality of seating pressure detection units. From, the seat pressure transition magnitude information in a predetermined time is set in the direction to the position of the seat pressure detection unit that has been most increased,
Alternatively, the seating pressure transition magnitude information in a predetermined time is set in a direction from the position of the seating pressure detection unit at which the seating pressure transition magnitude information is reduced to the center point of the seating pressure detection unit. The driver monitoring apparatus according to any one of claims 5 to 6.
前記加速度変換手段は、加速度の方向を加速度角度区画に分類し、前記座圧変換手段は、座圧推移の方向を座圧角度区画に分類し、
前記加速度影響判断手段は、前記加速度角度区画と前記座圧角度区画が同じもしくは、その隣同士の区画であれば、車両運転者の姿勢変化が車両走行に起因するものとする車両走行起因体動であると判断すること、を特徴とする請求項1乃至8のいずれかに記載の運転者監視装置。
The acceleration conversion means classifies the direction of acceleration into acceleration angle sections, the seat pressure conversion means classifies the direction of seat pressure transition into seat pressure angle sections,
When the acceleration angle section and the seating pressure angle section are the same or adjacent to each other, the acceleration influence determining means determines that the vehicle driver's posture change is caused by vehicle travel. The driver monitoring device according to claim 1, wherein the driver monitoring device is determined to be.
前記座圧変換情報より車両運転者の状態が異常か、否かを判定する状態判定部を有し、前記状態判定部が前記車両運転者の状態を異常と判定し、かつ前記加速度影響判断手段が、車両運転者の姿勢変化が車両走行起因体動ではないと判断した際、運転者に異常姿勢であることを報知する警告部を有すること、を特徴とする請求項1乃至9いずれかに記載の運転者監視装置。
A state determination unit that determines whether or not the state of the vehicle driver is abnormal based on the seat pressure conversion information, the state determination unit determines that the state of the vehicle driver is abnormal, and the acceleration influence determination unit; 10. A warning unit for notifying the driver of an abnormal posture when it is determined that the posture change of the vehicle driver is not a vehicle movement-induced body movement. The driver monitoring device described.
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CN104574821A (en) * 2015-01-13 2015-04-29 上海优思通信科技有限公司 Driving safety prompting device and method
JP2018061662A (en) * 2016-10-12 2018-04-19 株式会社デンソー Biological information measuring apparatus and diagnosis support system
WO2018180331A1 (en) * 2017-03-28 2018-10-04 国立大学法人九州工業大学 Driver-status detecting device
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