JPWO2013175594A1 - Driver state determination device and driver state determination method - Google Patents

Abstract

A driver state determination device according to the present invention includes a meandering detection unit that detects the degree of meandering per vehicle reference time C, a consciousness reduction determination unit that determines whether or not the driver's consciousness of the vehicle has decreased, and a meandering detection unit And a control unit that controls the operation of the consciousness decrease determination unit such that the greater the degree of meandering detected is, the less likely it is to be determined that the consciousness is decreased.

Description

  The present invention relates to a driver state determination device and a driver state determination method that detect a predetermined driving operation and determine the state of a driver.

  2. Description of the Related Art Conventionally, techniques for detecting a predetermined driving operation and confirming a driver state or awakening a driver are known. For example, in the following Patent Document 1 (Japanese Patent Application Laid-Open No. 2011-18695), a wobbling detection unit that detects wobbling of a vehicle and whether or not the number of wobblings exceeds a threshold value. A technique for notifying a driver of a break acquisition advice when a determination is made is disclosed. As described above, a driver state determination device that notifies a driver of advice or warning according to the number of times the vehicle fluctuates is known.

JP 2011-18695 A JP 2011-227551 A

  By the way, for example, when the driving skill of the driver is low, or when there is a habit of driving, the wobbling of the vehicle may increase even if the driver's awareness is not lowered. Therefore, when determining the driver state according to the number of times of wandering as described above, the number of misjudgments that determine that the driver's consciousness has not decreased but increased is increased, and an unnecessary alarm is output. Problems occur. Thus, in the conventional driver state determination device, there is room for improvement in the accuracy of determination as to whether or not the driver's consciousness has decreased.

  Accordingly, an object of the present invention is to provide a driver state determination device and a driver state determination method that can accurately determine the state of the driver by determining the state of the driver according to the driving skill and driving habit.

  The driver state determination apparatus according to the present invention that has solved the above problems includes a meandering detection unit that detects the degree of meandering per reference time of the host vehicle and a consciousness determination that determines whether or not the driver's consciousness of the host vehicle has decreased. A determination unit; and a control unit that controls the operation of the consciousness decrease determination unit such that the greater the degree of meandering detected by the meandering detection unit, the less likely it is to be determined that the consciousness is decreased.

  The driver state determination apparatus according to the present invention is configured such that the greater the degree of meandering, the less likely it is to be determined that the consciousness is reduced. For this reason, it becomes possible to determine a decrease in consciousness according to the driver's driving skill and driving habits, and the driver's state can be accurately determined.

  Further, in the driver state determination device according to the present invention, the control unit includes a consciousness decrease determination unit so that the consciousness decrease is less likely to be determined when the degree of meandering per reference time detected by the meander detection unit is greater than a reference value. It is preferable to control the operation of. According to the present invention, when the degree of meandering per reference time is larger than the reference value, it is difficult to determine that the consciousness is lowered. For this reason, even when the driver's driving skill is low or when the vehicle fluctuates due to driving habits, it is possible to reduce the determination that this is a decrease in consciousness. Therefore, it is possible to reduce the erroneous determination of the driver's consciousness decrease and to determine the driver state with higher accuracy.

  In the driver state determination apparatus according to the present invention, the meandering degree is preferably at least one of the meandering amount and the meandering number per reference time of the host vehicle. According to this invention, a control part controls the action | operation of a consciousness fall determination part based on at least any one of the amount of meanders per reference time, and the number of times of meandering. Accordingly, it is possible to perform appropriate consciousness determination according to at least one of the amount of meandering and the number of times of meandering, and reduce erroneous determination of driver consciousness degradation.

  Further, in the driver state determination device according to the present invention, the consciousness reduction determination unit determines whether or not the consciousness has decreased based on the traveling state of the host vehicle, and when the traveling state of the host vehicle exceeds a threshold value. When it is determined that the driver's consciousness of the host vehicle has decreased, the control unit sets the threshold higher when the degree of meandering per reference time is greater than the reference value compared to when the degree of meandering is less than or equal to the reference value. It is preferable. According to this invention, a control part changes the determination threshold value of a consciousness fall determination part according to the meandering degree per reference | standard time. Therefore, it becomes possible to perform more delicate determination of consciousness reduction, and it is possible to further reduce erroneous determination of consciousness deterioration determination.

  Further, the driver state determination method according to the present invention is a driver state determination method for determining whether or not the driver's consciousness of the own vehicle has deteriorated. In the driver state determination method, the meandering degree detection step of detecting the degree of meandering per reference time of the own vehicle. And a control step for controlling the operation of the consciousness decrease determination so that it is difficult to determine that the driver has decreased consciousness as the detected degree of meandering is larger.

  In the driver state determination method according to the present invention, the operation of the consciousness decrease determination is controlled by the control step so that the greater the degree of meandering, the harder it is determined that the driver has decreased consciousness. For this reason, even if the driver's driving skill is low or the vehicle fluctuates due to driving habits, it is possible to reduce the determination that this is a decrease in consciousness. Therefore, it is possible to reduce the erroneous determination of the driver's consciousness decrease and to determine the driver state with higher accuracy.

  ADVANTAGE OF THE INVENTION According to this invention, the driver state determination apparatus which can determine a driver's state accurately can be provided by determining a driver's state according to a driving skill or driving habit.

It is a block diagram of the driver state determination apparatus which concerns on embodiment of this invention. It is a flowchart which shows the consciousness fall determination processing performed by the driver state determination apparatus of FIG.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 1, a driver state determination device 1 according to the present embodiment is mounted on a vehicle 100 that is a host vehicle, and determines whether or not a driver performing a predetermined driving operation is in a state of reduced consciousness. It is. The driver state determination device 1 includes a meandering detection unit 27 that detects the degree of meandering per reference time of the vehicle 100, a consciousness decrease determination unit 26 that determines whether or not the driver of the vehicle 100 has decreased, and a meandering detection unit. 27 is configured to include a control unit 28 that controls the operation of the consciousness lowering determination unit 26 so that the degree of meandering detected by 27 is less likely to be determined as consciousness lowering. The consciousness decrease determination unit 26, the meandering detection unit 27, and the control unit 28 are mounted on, for example, a driver state detection ECU 2 (Electronic Control Unit) 2.

  The driver state determination device 1 includes various sensors for measuring a vehicle state including an inter-vehicle distance detection unit 11, a steering angle sensor 12, a lateral position detection unit 13, a vehicle speed sensor 14, a front camera 15, and the like, an alarm device 16, A driver state detection ECU 2 is provided. The various sensors and alarm device 16 are connected to the driver state detection ECU 2. Further, the driver state detection ECU 2 generates consciousness decrease information indicating a driver's consciousness decrease state, and outputs the generated consciousness decrease information to the alarm device 16.

  The inter-vehicle distance detection unit 11 is provided, for example, in the front part of the vehicle 100, and detects the inter-vehicle distance between the vehicle 100 and a preceding vehicle that travels in front of the vehicle 100. The inter-vehicle distance detection unit 11 transmits the detected inter-vehicle distance to the driver state detection ECU 2 as an inter-vehicle distance signal. For example, a front radar such as a laser radar or a millimeter wave radar can be used as the inter-vehicle distance detection unit 11.

  The steering angle sensor 12 functions as a traveling state detection unit that detects the traveling state of the vehicle 100, and specifically, is a steering amount detection unit that has a function of detecting the steering amount of the steering wheel of the vehicle 100. . As the steering angle sensor 12, for example, a sensor that detects a steering angle of a steering wheel input by a driver is used. The steering angle sensor 12 transmits the detected steering angle to the driver state detection ECU 2 as a steering angle signal. The driver state detection ECU 2 calculates the steering angular velocity based on the steering angle signal from the steering angle sensor 12, and stores the calculated steering angular velocity in the information storage unit 23 described later.

  The lateral position detection unit 13 is a sensor that detects a lateral position based on the center of the lane in which the vehicle 100 is traveling, for example. The lateral position detector 13 transmits the detected lateral position to the driver state detection ECU 2 as a lateral position signal. As the horizontal position detection unit 13, for example, a unit that detects a horizontal position based on a white line (lane marker) of a lane in a front image captured by a camera can be used. The driver state detection ECU 2 calculates the lateral position speed based on the amount of change in the lateral position signal from the lateral position detection unit 13 and stores the calculated lateral position speed in the information storage unit 23.

  The vehicle speed sensor 14 has a function of detecting the speed of the vehicle 100 and is provided, for example, on a wheel of the vehicle 100. For example, the vehicle speed sensor 14 detects the rotational speed of the wheel and calculates the vehicle speed of the vehicle 100 from the rotational speed. The vehicle speed sensor 14 transmits the calculated vehicle speed to the driver state detection ECU 2 as a vehicle speed signal.

  The front camera 15 is attached to the front part of the vehicle 100, for example, images the predetermined range ahead of the vehicle 100, and produces | generates image data, such as a preceding vehicle and a road. Imaging by the front camera 15 and generation of image data are performed at predetermined time intervals, and the generated image data is output to, for example, a curvature calculation unit 22 described later of the driver state detection ECU 2.

  The warning device 16 is a device that issues a warning to the driver in accordance with the driving consciousness reduction information output from the driver state detection ECU 2 to alert the driver. As the alarm device 16, for example, a speaker that emits sound to the driver can be used.

  The driver state detection ECU 2 includes, for example, a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like, and includes an information acquisition unit 21, a curvature calculation unit 22, an information storage unit 23, A steering amount calculation unit 24, an overcorrection determination unit 25, a consciousness decrease determination unit 26, a meandering detection unit 27, and a control unit 28 are provided.

  The information acquisition unit 21 repeatedly acquires various signals output from the inter-vehicle distance detection unit 11, the steering angle sensor 12, the lateral position detection unit 13, and the vehicle speed sensor 14, and stores each signal in the information storage unit 23.

  The curvature calculation unit 22 acquires image information of the traveling road ahead of the vehicle 100 captured by the front camera 15 and calculates the curvature of the traveling road based on the image information. The curvature of the traveling road is calculated based on, for example, the detection state of the white line on the traveling road. The curvature calculation unit 22 stores the calculated curvature of the traveling path in the information storage unit 23.

  The information storage unit 23 has a function of storing travel information of the vehicle 100 detected by various sensors such as the inter-vehicle distance detection unit 11. The information storage unit 23 cumulatively stores the lateral position of the vehicle 100 detected by, for example, the lateral position detection unit 13.

  The normal steering amount calculation unit 24 calculates the normal steering amount based on, for example, a forward gaze model using the inter-vehicle distance, steering angle, lateral position, vehicle speed, lateral position speed, road curvature, and the like stored in the information storage unit 23. To do. The normal steering amount indicates a steering angle estimated to be steered in a driver's normal consciousness state, and is also referred to as a normal steering region or steering angle dispersion.

  The overcorrection determination unit 25 has a function of calculating a difference between the normal steering amount and the steering amount detected by the steering angle sensor 12 as an index indicating whether the driver's steering correction is excessive. Here, the excessive correction means that the correction is performed excessively compared with the steering amount that should be corrected. When the driver's consciousness state decreases, the variation in steering becomes large, and when this variation becomes large, the steering correction accompanying it becomes excessive. In other words, when the driver's consciousness state decreases, a specific steering pattern including excessive steering correction occurs.

  The consciousness decrease determination unit 26 has a function of determining whether or not the driver's consciousness of the vehicle 100 has decreased. The consciousness decrease determination unit 26 determines whether or not the consciousness has decreased based on the traveling state of the vehicle 100. For example, when the traveling state of the vehicle 100 exceeds the threshold value X, the consciousness of the driver of the vehicle 100 has decreased. Judge that it is. More specifically, the traveling state is a specific steering pattern or a vehicle behavior pattern that is set in advance so that it is determined that the driver has reduced consciousness when a predetermined condition is satisfied. For example, when the difference calculated by the overcorrection determination unit 25 is greater than or equal to the threshold value X, it is determined that the driver is in a state of reduced consciousness, and when the difference is less than the threshold value X, the driver is not in a state of reduced consciousness. judge. When the driver's consciousness determination unit 26 determines that the driver is in a state of consciousness reduction, the consciousness reduction determination unit 26 outputs consciousness reduction information to the alarm device 16.

  The meandering detection unit 27 detects the degree of meandering of the vehicle 100. Specifically, the meandering detection unit 27 has a function of detecting an average meandering amount and the number of meandering times per reference time of the vehicle 100. For example, the meandering detection unit 27 obtains the lateral position of the vehicle 100 stored in the information storage unit 23 every predetermined time, and calculates the average meandering amount. Further, the meander detection unit 27 counts the number of meanders from the lateral position of the vehicle 100 stored in the information storage unit 23, for example. Specifically, the number of times that the lateral position of the vehicle 100 per reference time is equal to or greater than the threshold value Y is counted. The threshold Y can be set to 1 m, for example. As for the method of counting the number of meandering times, a method of detecting the mountain (peak value) of the trajectory of the lateral position of the vehicle and counting the number of times may be used.

  The control unit 28 has a function of comprehensively controlling the driver state detection ECU 2. The control unit 28 controls the operation of the consciousness decrease determination unit 26 such that the greater the degree of meandering detected by the meandering detection unit 27, the more difficult it is determined that the consciousness is decreased. Specifically, when the degree of meandering per reference time is larger than the reference value, the control unit 28 sets the threshold value X of the consciousness deterioration determining unit 26 higher than when the degree of meandering is equal to or less than the reference value. .

  Next, the operation of the driver state determination device 1 according to the present embodiment and the driver state determination method according to the present embodiment will be described with reference to FIG. The process shown in FIG. 2 is executed by the driver state detection ECU 2, and is a consciousness decrease determination process routine for determining whether or not the driver's consciousness driving the vehicle 100 has decreased. This consciousness decrease determination process is repeatedly executed at predetermined time intervals such as 100 ms.

  First, in step S10 (hereinafter referred to as “S10”, the same applies to other steps), the meandering detection unit 27 performs lateral position acquisition processing. Specifically, the lateral position of the vehicle 100 detected by the lateral position detection unit 13 is stored in the information storage unit 23, and the meandering detection unit 27 acquires this stored information.

  In S10, the signals output from the inter-vehicle distance detection unit 11 and the like are stored in the information storage unit 23, and the steering angular velocity and the lateral position velocity are calculated based on these signals. It is stored in the storage unit 23. After the process of S10 is completed, the process proceeds to S12.

  In S <b> 12, time measurement processing is executed by the meandering detection unit 27. In S12, the meandering detection unit 27 starts measuring the operation continuation time, and the process proceeds to S14.

  In S <b> 14, meandering amount calculation processing is executed by the meandering detection unit 27. Specifically, the lateral position of the vehicle 100 acquired in S10 is added to the lateral position of the vehicle 100 already stored in the information storage unit 23, and the average value of the lateral position is calculated as the average meandering amount of the vehicle 100. . After this average meandering amount calculation process is completed, the process proceeds to S16. The process of S14 corresponds to a meandering degree detecting step for detecting the meandering degree of the host vehicle.

  In S <b> 16, the meandering amount determination process is executed by the control unit 28. Specifically, the control unit 28 determines whether or not the average meandering amount calculated in S14 is larger than the reference value A. When the average meandering amount is larger than the reference value A, the process proceeds to S18, and when the average meandering amount is equal to or less than the reference value A, the process proceeds to S10 and the lateral position acquisition process is executed again.

  In S <b> 18, the meander detection unit 27 performs a meander count process. In S <b> 18, the meander detection unit 27 calculates the number of meanders of the vehicle 100 based on the number of lateral position information stored in the information storage unit 23, for example. Specifically, meandering detection unit 27 counts the number of times that the lateral position of vehicle 100 is equal to or greater than threshold value Y, and proceeds to S20. The process of S18 corresponds to a meandering degree detecting step for detecting the meandering degree of the host vehicle.

  In S20, the meandering number determination process is executed by the control unit 28. Specifically, the control unit 28 determines whether or not the number of meanders calculated in S18 is greater than the reference value B. If the number of meanders is greater than the reference value B, the process proceeds to S22, and if it is equal to or less than the reference value B, the process proceeds to S10 and the horizontal position acquisition process is executed again.

  In S <b> 22, a first operation duration determination process is executed by the control unit 28. Specifically, the control unit 28 determines whether or not the operation continuation time at which measurement is started in S12 is less than the reference time C. Then, when the operation continuation time is less than the reference time C, the process proceeds to S26, and when it is equal to or more than the reference time C, the process proceeds to S24.

  Note that “when the operation duration time is less than the reference time C” in S22 means that “the average meandering amount per reference time C detected by the meandering detection unit 27 is larger than the reference value A and the number of meanders is the reference value. "When more than B". Regarding the setting of the reference time C, it is more preferable to use a time within a predetermined time set from the start of operation (initial).

  In S24, the control unit 28 executes a second operation duration determination process. Specifically, the control unit 28 determines whether or not the operation continuation start time when the measurement is started in S12 is longer than the reference time D. The reference time D is set longer than the reference time C. Then, when the operation continuation time is longer than the reference time D, the process proceeds to S28, and when it is equal to or less than the reference time D, the process proceeds to S10 and the lateral position acquisition process is executed again.

  In S26, a first threshold value changing process is executed by the control unit 28. In the first threshold value changing process, the control unit 28 determines that the driving skill of the driver is low, for example, and sets the threshold value X that is the determination threshold value of the consciousness decrease determination unit 26 to be high. This makes it difficult for the consciousness decrease determination unit 26 to determine that the driver's consciousness has decreased. The process of S26 corresponds to a control step for controlling the operation of the consciousness decrease determination so that the driver is less likely to be determined to have decreased consciousness as the detected degree of meandering is larger.

  On the other hand, in S28, the control unit 28 executes the second threshold value changing process. In the second threshold value changing process, the control unit 28 determines that the driver's consciousness lowering state continues for a long time and sets the threshold value X low. Thereby, the consciousness decrease determination unit 26 can easily determine that the driver's consciousness has decreased. After the process of S26 or S28 described above, the process proceeds to S30.

  In S <b> 30, the consciousness decrease determination unit 26 executes consciousness decrease determination processing. Specifically, the consciousness decrease determination unit 26 determines whether or not the traveling state of the vehicle 100 exceeds the threshold value X, and outputs the consciousness decrease information to the alarm device 16 when the threshold value X is exceeded. Then, after the alarm device 16 issues an alarm to the driver, the series of processing ends. On the other hand, if it is equal to or less than the threshold value X, the consciousness decrease determination unit 26 determines that the driver's consciousness has not decreased, and then ends the series of processes. For example, when the consciousness decrease determination unit 26 performs the consciousness decrease determination based on the difference between the normal steering amount and the actual steering amount, the consciousness decrease determination unit 26 is conscious when the difference in the steering amount is larger than the threshold value X. It is determined that it has decreased, and when it is equal to or less than the threshold value X, it is determined that awareness has not decreased.

  As described above, the driver state determination apparatus 1 according to the present embodiment has the meandering detection unit 27 that detects the meandering amount and the number of meanders per reference time C of the vehicle 100 and whether the driver's consciousness of the vehicle 100 has decreased. When the average meandering amount detected by the lowering consciousness determination unit 26 and the meandering detection unit 27 is larger than the reference value A and the number of meandering times is larger than the reference value B, it is difficult to determine that the consciousness is lowered. And a control unit 28 that controls the operation of the consciousness decrease determination unit 26.

  As described above, in the present embodiment, when the average meandering amount per reference time C is larger than the reference value A and the number of meandering times is larger than the reference value B, it is difficult to determine that the consciousness is lowered. For this reason, immediately after the start of driving, if the driver's driving skill is low, driving is hesitant, or even if he / she is not accustomed or is driving well, it is determined that this is a decrease in consciousness. Misjudgments can be reduced. Accordingly, it is possible to reduce the erroneous determination of the driver's consciousness decrease and to increase the accuracy of the determination as to whether or not the driver's consciousness has decreased. In this embodiment, the threshold value X is updated so as to match the driver's driving skill, driving habit, etc., and the greater the degree of meander, the less likely it is to be determined that the consciousness is lowered. It is possible to perform a decrease determination, and it is possible to reduce the driver's feeling of discomfort with the support content of the driver state determination device 1.

  Moreover, in the driver state determination apparatus 1, the control part 28 sets the threshold value X low when driving | running | working continuation start time is longer than the reference time D (refer S28 of FIG. 2). Therefore, since the driver state determination device 1 has logic according to the level of danger such as when the driver's consciousness reduction state continues for a long time, the driver state determination device 1 is surely connected when the driver enters the consciousness reduction state. It is possible to reduce the risk by outputting an alarm or the like.

  In the driver state determination device 1 of the present embodiment, the consciousness decrease determination unit 26 determines whether or not the consciousness has decreased based on the traveling state of the vehicle 100, and the traveling state of the vehicle 100 exceeds the threshold value X. The control unit 28 determines that the consciousness of the driver of the vehicle 100 has decreased, the average meandering amount per reference time C exceeds the reference value A, and the number of meanders per reference time C exceeds the reference value B. In this case, the threshold value X is set higher than when the average meandering amount is the reference value A or less or the meandering frequency is the reference value B or less. Therefore, since the control unit 28 changes the determination threshold value of the consciousness decrease determination unit 26 according to the meandering degree per reference time C, it becomes possible to perform a more precise consciousness decrease determination, and erroneous determination of the consciousness decrease determination This can be further reduced.

  In addition, the driver state determination method of the present embodiment has a meandering degree detection step for detecting the meandering degree per reference time C of the vehicle 100, and the greater the detected meandering degree, the more difficult it is to determine that the driver has become less conscious. And a control step for controlling the operation of the consciousness degrading determination, so that even if the driver's driving skill is low or the driving habits cause the vehicle 100 to fluctuate, it is determined that the consciousness is degrading. Therefore, it is possible to reduce the erroneous determination of the driver's consciousness decrease and to determine the driver state with higher accuracy.

  The above-described embodiment is an explanation of an embodiment of the driver state determination device and the driver state determination method according to the present invention, and the driver state determination device and the driver state determination method according to the present invention are described in this embodiment. It is not limited to that. The driver state determination device and the driver state determination method according to the present invention are modified or changed to the driver state determination device and the driver state determination method according to the present embodiment without changing the gist described in each claim. It may be applied.

  For example, in the above embodiment, the processing of S16 and S20 in FIG. 2 is performed, and the determination threshold is increased when the average meandering amount per reference time C is larger than the reference value A and the number of meandering times is larger than the reference value B. An example in which it is difficult to determine that consciousness has been reduced has been described. However, the condition that makes it difficult to determine that the consciousness is reduced is not limited to this. For example, one of S16 and S20 may be omitted. Specifically, at least one of the case where the average meandering amount per reference time C of the vehicle 100 is larger than the reference value B and the number of meandering times per reference time C of the vehicle 100 is larger than the reference value B. You may make it difficult to determine with consciousness fall.

  Further, in the above embodiment, an example has been described in which it is difficult to determine that the consciousness is lowered when the average meandering amount per reference time C of the vehicle 100 is larger than the reference value B. However, the average meandering amount is not necessarily used. In other words, instead of the average meandering amount, any index indicating the degree of meandering may be used. For example, when the minimum meandering amount per reference time C of the vehicle 100 is larger than a predetermined reference value, it is difficult to determine that the consciousness is lowered. Also good.

  Further, in the above-described embodiment, an example has been described in which it is difficult to determine that the degree of consciousness is lowered when the degree of meandering per reference time C of the vehicle 100 is greater than the reference value. However, the present invention is not limited to an example in which it is difficult to determine that the consciousness is lowered when the vehicle is larger than the reference value. Specifically, three or more threshold values X may be set when setting the determination threshold value X for consciousness deterioration according to the degree of meandering, or the relationship between the degree of meandering and the threshold value X may be a map or graph, for example. The threshold value X may be determined as appropriate according to the detected meandering degree.

  In the above-described embodiment, the example in which the difference between the actual steering amount and the normal steering amount is used for the consciousness reduction determination has been described. However, this difference in steering amount does not necessarily have to be used. In other words, if there is an index that can detect whether or not the running state of the vehicle deviates compared to the normal time (when the driver is awake), this index can be used instead of the steering amount. Specifically, for example, the consciousness deterioration determination may be performed based on whether or not the vehicle approach angle with respect to the lane exceeds a predetermined angle. In this case, the same effect as in the above embodiment can be obtained.

  The present invention can be used as a driver state determination device mounted on a vehicle.

DESCRIPTION OF SYMBOLS 1 ... Driver state determination apparatus, 2 ... Driver state detection ECU, 11 ... Inter-vehicle distance detection part, 12 ... Steering angle sensor, 13 ... Lateral position detection part, 14 ... Vehicle speed sensor, 15 ... Front camera, 16 ... Alarm device, 21 DESCRIPTION OF SYMBOLS Information acquisition part 22 ... Curvature calculation part 23 ... Information storage part 24 ... Normal steering amount calculation part 25 ... Overcorrection determination part 26 ... Decrease consciousness determination part 27 ... Meander detection part 28 ... Control part.

The driver state determination device according to the present invention that has solved the above-described problems is preset so that it is determined that the meandering detection unit that detects the degree of meandering per reference time of the host vehicle and the driver of the host vehicle have lost consciousness. The lower the awareness of the driver of the host vehicle based on the driving state that is a specific steering pattern or vehicle behavior pattern, and the greater the degree of meander detected by the meander detection unit, the more conscious And a control unit that controls the operation of the consciousness decrease determination unit so that it is difficult to be determined as a decrease.

In addition, the driver state determination method according to the present invention is based on the driving state of the driver of the host vehicle based on a driving state that is a specific steering pattern or vehicle behavior pattern that is set in advance so as to determine that the driver of the host vehicle has deteriorated . In the driver state determination method for determining whether or not the consciousness has decreased, the meandering degree detecting step for detecting the meandering degree per reference time of the own vehicle, and the greater the detected meandering degree, the more the driver has become less conscious. And a control step for controlling the operation of the consciousness decrease determination so that the determination is difficult.

Claims (5)

A meandering detection unit for detecting the degree of meandering per reference time of the vehicle;
A consciousness decrease determination unit that determines whether or not the driver's consciousness of the host vehicle has decreased;
A control unit that controls the operation of the consciousness decrease determination unit such that the greater the degree of meandering detected by the meandering detection unit is, the less likely it is to be determined that the consciousness decrease is;
A driver state determination device. The control unit controls the operation of the consciousness decrease determination unit so that it is less likely to be determined as consciousness decrease when the degree of meandering per reference time detected by the meandering detection unit is larger than a reference value.
The driver state determination apparatus according to claim 1. The degree of meandering is at least one of the amount of meandering and the number of meandering times per reference time of the host vehicle.
The driver state determination apparatus according to claim 1 or 2. The consciousness decrease determination unit determines whether or not consciousness has decreased based on the traveling state of the host vehicle, and the driver's consciousness decreases when the traveling state of the host vehicle exceeds a threshold value. It is determined that
When the degree of meandering per reference time is greater than the reference value, the control unit sets the threshold higher than when the degree of meandering is equal to or less than the reference value.
The driver state determination apparatus according to claim 2. In the driver state determination method for determining whether or not the driver's awareness of the host vehicle has decreased,
A meandering degree detecting step for detecting a meandering degree per reference time of the vehicle;
And a control step for controlling an operation of the consciousness decrease determination so that it is difficult to determine that the driver has decreased consciousness as the detected degree of meandering is larger.

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