JP2002331848A - Driving condition detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly detect a rush driving condition of a driver. SOLUTION: A driving condition detector comprises a traveling speed detecting means (a vehicle speed sensor 3) for detecting the traveling speed of the concerned vehicle, an acceleration detecting means (an acceleration sensor 4) for detecting the acceleration of the concerned vehicle, a discriminated acceleration storage means 1a for storing the acceleration for each speed when a driver performs the regular traveling, an acceleration comparing means 1b for comparing the acceleration detected by the acceleration detecting means with a discriminated acceleration stored in the discriminated acceleration storage means 1a for each vehicle speed, and a driving condition discriminating means 1c for discriminating the driving condition of the driver based on the result of comparison of the acceleration comparing means 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving state detecting device for grasping a driver's mental state from a driving state of the driver.

[0002]

2. Description of the Related Art In general, measures are taken to prevent an accident by detecting a driver's psychological state that causes an accident and giving an alarm. Conventional alarm devices of this type are provided with a steering angle sensor on the steering, or
A yaw rate sensor is provided on the vehicle body to sense the meandering of the vehicle body,
In some cases, when a driver whose arousal level is lowered starts meandering driving, an alarm device provided in the vehicle is activated. There is also known an operating state warning device disclosed in Japanese Patent Application Laid-Open No. 7-257222. This device compares the driving pattern formed from the frequency of acceleration, deceleration, and turning during driving of the own vehicle with the driving pattern in a state where the mental state is not disturbed, and determines the mental state of the driver. is there.

[0003]

According to this kind of driving state warning device, it is possible to detect the mental state of the driver. However, in normal running, acceleration tends to be larger at low speed running than at high speed running in relation to the gear ratio. Therefore, only one threshold is used to determine acceleration, and the driver's psychological state is determined. In the conventional method for determining, there is a problem that a warning is frequently generated during low-speed running, and it is difficult to be warned during high-speed running.

Further, in the conventional method, it is determined whether or not there is an abnormality based on the frequency of occurrence of acceleration, deceleration, and turning. Therefore, there is a problem that a certain time is required before a warning is issued. In addition, since the determination is made only based on the frequency of occurrence, even if the vehicle is suddenly decelerated or suddenly decelerated, such as when driving in a traffic jam, a certain time or more may elapse during the operation. There is also a problem in that the situation is not determined as an unsafe state.

SUMMARY OF THE INVENTION It is an object of the present invention to accurately detect a driver's urgent action and to give a warning to the driver so as to suppress it.

[0006]

SUMMARY OF THE INVENTION The present invention has been devised to achieve the above object, and the invention according to claim 1 comprises a traveling speed detecting means for detecting the traveling speed of the own vehicle, Acceleration detection means for detecting acceleration, determination acceleration storage means for storing the acceleration when the driver is traveling normally for each speed, acceleration detected by the acceleration detection means, and the determination acceleration storage A driving state detection device comprising: acceleration comparison means for comparing the judgment acceleration stored in the means for each vehicle speed; and driving state judgment means for judging the driving state of the driver based on the result of comparison by the acceleration comparison means. Is provided.

[0007] That is, the conventional (Japanese Patent Laid-Open No. 7-257222)
Japanese Patent Application Laid-Open No. H11-207,1992 has a problem that it is necessary to perform data measurement for a certain period of time or more because the rapid operation is determined based on the frequency of occurrence of abnormal acceleration and deceleration. If an abnormal acceleration is detected in the above, a warning is immediately issued to the driver, so that the above-described problem does not occur. In addition, since the determination of the driving state is based on the current speed and the determination acceleration for each speed regardless of the frequency of occurrence, accurate determination can be performed even if the occurrence interval of the abnormal acceleration is longer than a certain time. It can be carried out.

According to a second aspect of the present invention, there is provided a traveling speed detecting means for detecting a traveling speed of the own vehicle, an acceleration detecting means for detecting an acceleration of the own vehicle, and an output of the acceleration detecting means for each vehicle speed zone. Maximum acceleration calculation means for calculating the maximum acceleration, determination acceleration storage means for storing the acceleration when the driver is traveling normally for each vehicle speed zone, and maximum acceleration calculated by the maximum acceleration calculation means Acceleration comparison means for comparing the judgment acceleration stored in the judgment acceleration storage means with each of the vehicle speed zones, and driving state judgment means for judging the driving state of the driver based on the result of the comparison by the acceleration comparison means. It is intended to provide an operating state detecting device provided with:

That is, according to the invention of claim 2, in addition to the invention of claim 1, in order to further determine the driving state for each vehicle speed range, the storage capacity of the determination data is reduced and the determination load is reduced. it can.

[0010] Further, the invention according to claim 3 is based on claim 1.
Alternatively, in the invention according to claim 2, there is provided a driving state detection device configured so that the driving state determination means determines an abnormal driving state when the acceleration of the own vehicle exceeds a value of the determination acceleration by a predetermined number of times. is there. In such an invention,
Even if the acceleration of the own vehicle exceeds the value of the determination acceleration, for example, it is not determined that the vehicle is abnormally driven up to two times. There is no.

Therefore, the alarm that operates in response to the abnormal operation does not accidentally operate.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the traveling speed detected by the traveling speed detecting means or the acceleration detected by the acceleration detecting means is provided. A driving state storage device that stores driving information as driving information, and that changes a value of the determination acceleration stored in the determination acceleration storage device based on the driving information. is there.

According to this invention, the data unique to the driver is reflected, and the driving state is determined with high accuracy and accuracy.

[0014] Further, the invention according to claim 5 provides the invention according to claim 4.
In the invention described in the above, there is provided a driver discriminating means for discriminating a driver, and driving information storing means for storing the driving information for each driver, and using the driving information stored in the driving information storing means. An object of the present invention is to provide a driving state detection device configured to change the value of the determination acceleration for each driver.

According to the fifth aspect of the present invention, the current driver can be determined by the driver determining means for determining the driver, so that the determination suitable for each driver can be performed.

According to a sixth aspect of the present invention, in accordance with the fourth or fifth aspect of the present invention, there is provided a vehicle position detecting means for detecting a position of the own vehicle. It is another object of the present invention to provide a driving state detection device configured to store the position information detected by the vehicle position detection means in the traveling information storage means. By storing the vehicle position information and the quick driving information together, the person or the business person can know the change in the driving state more accurately.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, there is provided detecting means for detecting at least one of a lighting state of a headlight and an operating state of a wiper. The present invention also provides a driving state detection device configured to correct the value of the determination acceleration based on at least one of a lighting state of the headlight and an operation state of a wiper.

For this reason, the judgment acceleration corresponding to the operation at night or during rainy weather is used, so that the judgment of the driving state suitable for the driving environment is made.

According to an eighth aspect of the present invention, in the driving state detecting device according to any one of the first to seventh aspects, there is provided communication means for communicating with the outside of the vehicle, and the driving state determination means is provided for abnormal operation. The present invention is to provide an operating state detecting device configured to transmit to an external receiving device via the communication means when it is determined.

Since the communication means transmits information on abnormality, driving, that is, urgent driving, to the outside, a business operator or the like can perform proper management for safety.

According to a ninth aspect of the present invention, there is provided the driving state according to any one of the first to eighth aspects, further comprising a warning means for warning a driver based on a result of the determination by the driving state determining means. A detection device is provided.

Since the warning is issued by the warning means, the driver can stop the abnormal driving and secure the safety.

[0023]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of an operation state detection device according to the first embodiment, and reference numeral 1 denotes an ECU serving as a control unit.

The ECU 1 is composed of a microcomputer mainly including an I / F (interface), a CPU, and memories (ROM, RAM).
A vehicle speed sensor 3 as a traveling speed detecting means for detecting the traveling speed of the own vehicle 7 and an acceleration sensor 4 as an acceleration detecting means for detecting the acceleration of the own vehicle 7 are connected to the input unit of the CU 1 and the driving unit is connected to the output unit. Warning means 2 such as a buzzer, a chime, and a speaker for warning a person are connected. The EC
U1 is mainly a determination acceleration storage unit 1a that stores, for each vehicle speed, the acceleration of the vehicle 7 during one cycle from the start to the stop when the vehicle is traveling normally, and the current acceleration detected by the acceleration sensor 4. The acceleration comparing means 1b for comparing the acceleration (hereinafter referred to as detected acceleration) with the judgment acceleration stored in the judgment acceleration storing means 1a for each vehicle speed, and the driving state of the driver based on the comparison result of the acceleration comparing means 1b. It is electrically configured to function as the driving state determining means 1c for determining and determining the driver's mental state.

FIG. 2 shows the urgency determination process by the ECU 1. The hurry determination process is started when the signal of the ignition switch IG is turned on.
As shown in FIG. 2, first, the vehicle speed (running speed) of the own vehicle 7 is detected from the output from the vehicle speed sensor 3 (S10).
1) The acceleration of the vehicle 7 is detected for each vehicle speed by the acceleration sensor 4 (S102). Subsequently, after the acceleration of the vehicle 7 is calculated for each vehicle speed, the acceleration comparing means 1b compares the detected acceleration and the determination acceleration for each vehicle speed to determine whether the detected acceleration exceeds the determination acceleration ( S103). When the result of the comparison by the acceleration comparison means 1b indicates that the detected acceleration exceeds the determination acceleration, the driving state determination means 1c
It is assumed that the driver's mental state is unstable and the driver's mental state is unstable and the driver's mental state is stable when the detected acceleration is less than the judgment acceleration. It is determined that the vehicle is driving safely. When the result of the comparison by the acceleration comparing means 1b indicates that the driving is in a hurry (S104), the driving state determining means 1c outputs an operation signal to the warning means 2 to warn the driver and perform the rush driving. The operation is stopped, and when the comparison result indicates that the vehicle is being safely driven, the output of the operation signal to the warning means 2 is prohibited and the current driving state is maintained.
For this reason, the driver will know whether his or her mental state is unstable or stable in response to urgent driving based on the presence or absence of a warning. Since the sudden acceleration operation and the sudden deceleration operation are stopped, it is possible to prevent an accident in a mental state corresponding to the rapid driving.

As described above, by comparing the detected acceleration with the determination acceleration for each vehicle speed to determine the presence or absence of the rush driving, the sensitivity to the detection of the rush driving can be drastically improved. However, if the sensitivity to rush driving is improved in this way, rush driving may be determined even when an emergency avoidance acceleration operation for avoiding danger is performed. Therefore, when the total number of times the detected acceleration exceeds the determination acceleration exceeds a predetermined number of times, for example, two times, the driving state determination unit 1c may be configured to output an activation signal to the warning unit 2. By doing so, the operation of the warning means 2 is prohibited even if an emergency avoidance operation is performed until the detected acceleration exceeds the determination acceleration by a predetermined number of times, so that the reliability of the detection of the rush driving is improved, and Can be prevented from being inadvertently warned. In addition, since the rush driving has a characteristic of being repeated until the driver's mental state is stabilized, a predetermined number of dead zones (up to two times in the present embodiment) is set before the rush driving is determined. This does not hinder detection.

As shown in FIG. 1, there is provided running information storage means 1d for storing the running speed (vehicle speed) detected by the vehicle speed sensor 3 or the detected acceleration detected by the acceleration sensor 4 as running information. Alternatively, the value of the determination acceleration stored in the determination acceleration storage means 1a may be changed based on the traveling information. When that happens,
The data of the current acceleration of the driver is reflected in the determination acceleration for each vehicle speed, and the determination of the rush driving suitable for the driver is made, so that the reliability of the detection of the rush driving is improved.

A selector switch 11 is connected to the input section of the ECU 1 as driver discriminating means for discriminating the current driver. The ECU 1 is connected to the traveling speed detected by the vehicle speed sensor 3 or the acceleration sensor. 4 is provided as driving information for each driver, and the acceleration detected by step 4 is stored as driving information for each driver. Using the driving information stored in the driving information storing means 1d, the value of the determination acceleration is stored for each driver. May be changed to
As described above, when the current driver is determined by the input of the driver selection signal of the select switch 11 and the value of the determination acceleration is changed for each driver, the determination of the rush driving suitable for each driver is made. Therefore, its reliability is improved.

Further, as shown in FIGS. 1 and 3, the vehicle 7 serves as vehicle position detecting means for detecting the position of the vehicle 7,
A gyro sensor 9 may be provided, and the position information of the vehicle 7 detected by the gyro sensor 9 and the determination result of the quick driving may be stored in the traveling information storage unit 1d together. In this way, after traveling in one course, the person or the operator can accurately know the change in the driving state and reflect it in the safe driving of the next traveling. As shown in FIG. 3, as the vehicle position detecting means for detecting the position of the vehicle 7, a GPS 10 using a GPS satellite S can be used instead of the gyro sensor 9.

Further, a headlight 1 is connected to an input unit of the ECU 1.
3 or an operation signal of the wiper 12 and a switching signal (many, medium, small).
The value of the determination acceleration of the determination acceleration storage means 1a may be changed for each vehicle speed based on at least one of the N / OFF signal, the operation signal of the wiper 12, and the switching signal (many, medium, small). For example, when the headlight 13 is on, the vehicle is traveling at night or traveling in a tunnel, and the acceleration determined for each vehicle speed is corrected to be small. When the operation signal of the wiper 12 is output, the switching signal of the wiper 12 (many, medium, small) ), The judgment acceleration for each vehicle speed is corrected to be small, and when the headlight 13 is ON and the operation signal of the wiper 12 is output,
Further, the determination acceleration for each vehicle speed may be corrected to be small. In this case, since the determination acceleration corresponding to the driving conditions at the time of night driving (or at the time of tunnel driving) or at the time of rainy driving is used, it is determined that the rush driving is suitable for the driving state and the driving environment.

As shown in FIG. 1, a communication means 5 for communicating with the outside of the vehicle, such as an automatic dial or wireless communication, is connected to the ECU 1, and the acceleration comparing means 1b determines that the current driving of the driver is a quick driving. In this case, data indicating a rush operation may be automatically transmitted to the external communication means (receiving device) 6 via the communication means 5. in this case,
The external communication means 6 is installed at a destination such as a business office 8,
When it is determined that the driving is in a hurry, as shown in FIG. 4, the point at which the driving in the hurry is discovered and the time (or date and time) may be transmitted together. In this case, the information of the rush driving is automatically transmitted from the communication means 5 of the own vehicle to the business office 8 or the like, so that the business operator or the like can give the driver an appropriate instruction for safety. Can be. For example, when the communication means 5 on the driver side transmits to the communication means 6 installed in the business office 8 or the like that the emergency operation is being performed, the business office 8 or the like instructs the driver to perform a quick operation. Stop it, etc. and take measures to prevent rush driving. Of course, a warning means (not shown) that operates in synchronization with the communication means 6 may be installed at a transmission destination such as the business office 8 so that prompt response can be made. Although the acceleration is detected by the acceleration sensor 4 in the present embodiment, the vehicle speed sensor 3 detects the acceleration.
The acceleration may be obtained by differentiating the vehicle speed detected by the above.

Next, another embodiment of the operating state detecting apparatus according to the present invention will be described. The same components as those of the operation state detection device according to claim 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 5 is a block diagram showing an operating state detecting apparatus according to the second aspect of the present invention. As illustrated, the ECU 21 as a control device includes an I / F (interface),
It is composed of a microcomputer mainly composed of a CPU and memories (ROM, RAM).
The vehicle speed sensor 3 is connected to the input unit of the vehicle 1 as traveling speed detecting means for detecting the traveling speed of the vehicle 7.
The acceleration sensor 4 is connected as acceleration detecting means for detecting the acceleration of the vehicle. In addition, a warning unit 2 such as a buzzer, a chime, a speaker or the like for warning the driver when a rush driving is determined is connected to the output unit of the ECU 21. The ECU
21 is a maximum acceleration calculating means 21e for calculating a maximum acceleration for each vehicle speed zone mainly based on the output of the acceleration sensor 4.
A determination acceleration storage unit 21f that stores, for each predetermined vehicle speed band, an acceleration of one cool from start to stop when the driver is traveling normally, and a maximum acceleration calculation unit 21e. Acceleration comparing means 21g for comparing the calculated maximum acceleration with the judgment acceleration stored in the judgment acceleration storage means 21f for each vehicle speed zone, and judging the driving state of the driver based on the comparison result of the acceleration comparing means 21g. It is electrically configured to function as driving state determination means 21h for determining the driver's mental state. The vehicle speed range is, for example, 0 to 10 km /
h, 10 to 20 km / h,...

FIG. 6 shows the urgency determination process of the ECU 21. This process is started when the signal of the ignition switch IG is turned on. As shown in FIG. 6, first, the vehicle speed of the host vehicle 7 is detected from the output from the vehicle speed sensor 3 (S201), and the acceleration of the host vehicle 7 is detected for each vehicle speed zone from the output of the acceleration sensor 4 (S201). S202). Subsequently, the maximum acceleration of the own vehicle 7 is calculated for each vehicle speed zone by the maximum acceleration calculating means 21e (S20).
3) Next, the maximum acceleration and the determination acceleration stored in the determination acceleration storage means 21f are compared for each vehicle speed band by the acceleration comparison means 21g, and it is determined whether or not the maximum acceleration exceeds the determination acceleration. (S204). The acceleration comparison means 21g determines that the maximum acceleration is the judgment acceleration storage means 21f.
When the acceleration exceeds the judgment acceleration, it is determined that the driver is in a rush operation (abnormal operation) in which the psychological state of the current driver is unstable and an accident is likely to occur, and when the maximum acceleration is equal to or less than the judgment acceleration, The driver's mental state is assumed to be stable and safe driving. The driving state determination unit 21h sends an operation signal to the warning unit 2 when it is determined that the driver is in a hurry driving (abnormal driving) in which the current mental state of the driver is unstable and an accident is likely to occur (S205). Output to warn the driver,
When it is determined that safe driving is being performed, the output of the operation signal to the warning means 2 is prohibited. Then, when the comparison result of the acceleration comparing means 21g indicates that the vehicle is running in a hurry (S20).
5) The operating state determining means 21h outputs an operation signal to the warning means 2 to stop the rush driving operation by warning, and when the comparison result indicates that safe driving is in progress, the warning means 2h.
To prohibit the output of the operation signal to the current operation state. As a result, a warning is issued, for example, when a rising acceleration at the exit of the curve, a sudden acceleration at the time of starting, or a change in acceleration peculiar to rush driving until reaching the cruising speed are detected. Knowing that the state is uneasy, the driving operation corresponding to the sudden driving such as the sudden acceleration operation and the sudden deceleration operation is to be revised, so that the occurrence of the accident due to the sudden driving is prevented.

By the way, when the maximum acceleration is calculated for each vehicle speed zone, and the maximum acceleration and the judgment acceleration are compared for each vehicle speed zone to determine the rapid driving, the accuracy of the detection of the rapid driving is greatly improved, but the danger is avoided. In some cases, an emergency avoidance acceleration operation may be determined to be a rush operation. Therefore, the warning means 2 may be operated when the total number of times the maximum acceleration exceeds the determination acceleration exceeds a predetermined number. For example, when the total number of times exceeding the determination acceleration of the maximum acceleration exceeds a predetermined number of times, for example, two times, the driving state determining unit 21 operates so that the warning unit 2 is operated.
h may be configured. As described above, since the rush driving has a characteristic of being repeated until the driver's mental state is stabilized, the rush driving is performed a predetermined number of times (two times in the present embodiment) until it is determined that the rush driving is performed. Setting the dead zone does not hinder detection. Therefore, the operation of the warning means 2 by the emergency avoidance operation is prevented until the maximum acceleration exceeds the determination acceleration by a predetermined number of times, so that the driver does not feel discomfort due to an unexpected warning.

As shown in FIG. 5, there is provided running information storage means 21i for storing the running speed (vehicle speed) detected by the vehicle speed sensor 3 or the detected acceleration detected by the acceleration sensor 4 as running information. The value of the judgment acceleration stored in the judgment acceleration storage means 21f may be changed based on the traveling information. In this case, the data of the current driver's acceleration is reflected in the determination acceleration for each vehicle speed range recorded in advance in the determination acceleration storage means 21f. Will be done accurately.

A selector switch 11 is connected to an input section of the ECU 21 as driver discriminating means for discriminating a current driver. On the other hand, the ECU 21 is connected to the traveling speed or the acceleration detected by the vehicle speed sensor 3. A driving information storage means 21i is provided for storing the acceleration detected by the sensor 4 as driving information for each driver, and the value of the determination acceleration is determined for each driver using the driving information stored in the driving information storage means 21i. May be changed to In this case, the current driver is determined by the input of the driver selection signal of the select switch 11, and the value of the determined acceleration is changed for each driver. Is determined.

Further, as shown in FIG. 5, a gyro sensor 9 is provided as a vehicle position detecting means for detecting the position of the vehicle 7 and the position information detected by the gyro sensor 9 indicates whether the vehicle is in a rush operation or a normal operation. May be stored in the travel information storage means 21i. In this way, after traveling in one course, the driver or the operator can accurately know the change in the driver's mental state, and this can be reflected in safe driving in the next course. Also,
As shown in FIG. 3, it is also possible to use a GPS 10 using a GPS satellite S as a vehicle position detecting means for detecting the position of the vehicle 7.

Further, a headlight 1 is connected to an input unit of the ECU 1.
3 or an operation signal of the wiper 12 and a switching signal (many, medium, small).
The value of the determination acceleration of the determination acceleration storage means 1a may be changed for each vehicle speed band based on at least one of the N / OFF state and the operating state of the wiper 12. For example, when the headlamp 13 is ON, it is determined that the vehicle is traveling at night or traveling in a tunnel.
Is output, the judgment acceleration is corrected to be small for each vehicle speed band in accordance with the switching signal (many, medium, small) of the wiper 12, the headlight 13 is turned on, and the wiper 12 is turned off.
When the operation signal is output, the determination acceleration may be further corrected to be small for each vehicle speed zone. With this configuration, the determination acceleration corresponding to the driving conditions during night driving (or during tunnel driving) or during rainy weather driving is used, and the rush driving corresponding to the driving state and the driving environment is determined.
The reliability of the detection of the rush operation is improved.

As shown in FIG. 5, the ECU 21 is connected to communication means 5 such as an automatic dial or wireless communication for communicating with the outside of the vehicle. Alternatively, when it is determined that the vehicle is in a hurry operation, data indicating the hurry operation may be transmitted to the external communication means (receiving device) 6 via the communication means 5. In addition, the external communication means 6 is installed, for example, at a transmission destination such as the business office 8 and when it is determined that the driving is in a hurry, as shown in FIG.
The time (or date and time) may be transmitted together with the rush driving data. In this way, the information of the hurry driving is automatically transmitted from the communication means 5 of the own vehicle to the transmission destination such as the business office 8 or the like. The driver will be instructed to be "dangerous" and will take measures to prevent driving in a hurry. In the present embodiment, the acceleration sensor 4
Although the acceleration is detected by the acceleration, the acceleration may be obtained by differentiating the vehicle speed detected by the vehicle speed sensor 3.

FIG. 7 shows another urgent determination process of the ECU 21, in which whether the actual maximum acceleration Gpi for each vehicle speed range is outside a predetermined range (distribution range) obtained from a maximum acceleration distribution curve created in advance. 1 shows an embodiment of a hurry determination process for determining rush driving. FIG. 8 shows data of the speed and acceleration of the vehicle 7 in one cool period from the time when the vehicle 7 starts to the time when the vehicle 7 stops when the vehicle is driven in a normal psychological state to create the distribution curve. FIG. 9 shows FIG.
FIG. 6 shows an acceleration distribution curve for each vehicle speed band of the own vehicle 7 created based on the average value and the standard deviation of the acceleration obtained by sampling the acceleration data at predetermined sampling intervals for each vehicle speed band. In the middle, black ● indicates the magnitude of the actual acceleration Gpi.

As shown in FIG. 7, in the hurry determination processing, it is determined whether or not the hurry determination processing has been executed for the first time based on whether the signal of the ignition switch IG is ON or OFF (S1). When the process is executed for the first time, the value of the counter N becomes 0 (N = 0). Next, the vehicle speed sensor 3
The vehicle speed of the host vehicle 7 is calculated from the output (output pulse) output from the CPU (S2), the acceleration by the acceleration sensor 4 is detected (S3), and then the acceleration sensor 4 is detected by the maximum acceleration calculation means 21e. The maximum acceleration Gpi of the vehicle 7 is calculated for each vehicle speed zone based on the output value (S
4). In the present embodiment, the acceleration is detected by the acceleration sensor 4. However, the acceleration may be obtained by differentiating the vehicle speed detected by the vehicle speed sensor 3.

Next, it is determined whether or not the current maximum acceleration Gpi exceeds the distribution range of the basic distribution curve set for each vehicle speed zone (S5). Is regarded as normal operation and the maximum acceleration Gpi
The average value and the standard deviation are calculated for each vehicle speed range, and the basic distribution obtained in advance for each vehicle speed range, that is, the self-distribution when the driver or the standard driver drives in a stable state of mental state. The acceleration distribution curve (hereinafter, referred to as a basic distribution curve) for each vehicle speed band, which is created based on the vehicle speed of the vehicle 7 and the maximum acceleration Gpi and stored in the memory, is corrected for each vehicle speed (S).
6). This corresponds to the basic distribution curve for each vehicle speed band shown in FIG.

After the basic distribution curve is corrected based on the maximum acceleration Gpi associated with the actual driving (first time) as described above, the basic distribution curve is further corrected in accordance with the running conditions, and the determination is made. Improve accuracy.

The running condition is determined based on whether the operation signal of the wiper 12 is output and whether the headlight 13 is on. When the operation signal of the wiper 12 is being output, it is determined that the vehicle is traveling on rainy weather, and then the state of rainy weather is determined according to the small (weak), medium, and large (strong) wiper 12. Next, the distribution curve for each vehicle speed band is corrected based on this determination, and the corrected distribution curve for each vehicle speed band is stored in the memory (S7).

When the operation signal of the headlamp 13 is output, it is assumed that the headlight 13 is in the nighttime (or when the vehicle is traveling in a tunnel). The curve is corrected and similarly stored in the memory (S
8). In this case, the correction of the basic distribution curve for rainy weather driving and night driving increases sensitivity to normal driving,
For example, correction such as lowering the average value is performed on the basic distribution curve during normal running (fine weather, daytime).

FIG. 10 shows a selection table of the basic distribution curve for each final vehicle speed zone obtained by the above-mentioned correction.
If a table is stored in the memory of the ECU 21 in this manner, the number of the wipers 12 is large (small), medium, strong (large),
Further, by detecting ON / OFF of the headlight 13, a basic distribution curve corresponding to the current traveling condition can be easily and quickly read. Then, after the basic distribution curve is optimally corrected in accordance with the current driving condition, the ECU 21 calculates the optimal basic distribution curve for the current driving state.
The maximum acceleration Gpi of the host vehicle 7 is calculated for each vehicle speed zone based on the output value of the vehicle speed sensor 3 and the output value of the acceleration sensor 4, and the process returns to step S2.

After the first time, the process proceeds to step S5 after detecting the vehicle speed in step S2, detecting the acceleration in step S3, and calculating the maximum acceleration Gpi in step S4. Then, it is determined whether or not the maximum acceleration Gpi for each vehicle speed band calculated based on the current driving in this step S5 exceeds a predetermined range of the basic distribution curve for each vehicle speed band read into the memory (S5). When the maximum acceleration Gpi for each vehicle speed band calculated based on the current driving is within a predetermined range of the basic distribution curve for each vehicle speed band read into the memory, it is determined that the vehicle is in normal driving without disturbance in mental state. Proceeding to S6 and subsequent steps, the basic distribution curve for each vehicle speed zone is corrected in accordance with the above-mentioned traveling conditions, and stored in a memory for learning. Maximum acceleration Gpi for each vehicle speed zone calculated based on current driving
Exceeds the predetermined range of the read basic distribution curve for each vehicle speed zone, it is determined that the driving is in a hurry with disturbance in the mental state, and the process proceeds to step S9.

In step S5, when it is determined that the vehicle is running normally, the warning means 2 does not operate, and when it is determined that the vehicle is running quickly, an output signal is output to the warning means 2 to warn the driver. .

In the above-described determination, the emergency operation is determined to be an urgent avoidance operation that does not depend on the driver's mental state. Therefore, the total number of times the emergency operation is determined is a predetermined number N, for example, 2 When the number of times has exceeded the number of times, that is, when the value of the counter N is 3 or more (S9), it is determined that the operation is in a hurry (S10), and at the same time, an operation signal is output to the warning means 2 to inform the driver Warning. Therefore, the rush operation is monitored with high accuracy. For example, the signs specific to the rush operation appearing in the acceleration at the rise of the curve exit, the rapid acceleration at the start, and the acceleration until the cruising speed is reached are determined a predetermined number of times (2 in this embodiment). Times), the warning means 2
The driving operation corresponding to the rush driving is revised by the warning issued from, and safety is ensured. In addition,
Although the communication means 5 and 6 are not shown in FIG. 7, the communication line is automatically opened when the hurrying operation is detected, and a warning is issued from the business office 8 etc. A step of notifying a warning such as "Stop" is appropriately incorporated.

Further, the confidence interval of the basic distribution curve is set to, for example, 95% in order to improve the accuracy of determination for quick driving, and the number of data to be collected for creating the basic distribution is set to 14, but it is large. If there is room in the memory or the capacity of the memory, the number of data collections can be increased to further increase the determination accuracy. Further, when the change of the driver is detected by the select switch 11 for inputting the current driver, the ECU 21 performs the step of the hurry determination processing from the beginning, and performs the processing for each driver. A unique basic distribution curve shall be created. When a speaker is used as the warning means 2, a deterrent sound can be output to the driver. Further, a maximum speed or a maximum acceleration may be set for each vehicle speed zone with respect to the vehicle speed or the determination acceleration, and when the maximum speed or the maximum acceleration is exceeded, the warning means 2 may be preferentially activated.
Further, the determination acceleration may be corrected based on a driving condition, for example, a highway or a general road.

[0052]

As described above, according to the present invention, the following excellent effects are exhibited. (1) When an unusual acceleration is detected, a warning is issued to the driver immediately, so that data measurement for a certain time or more is not required. In addition, the determination can be made irrespective of the frequency of occurrence of rush driving. If this is done, an accurate determination can be made even if there is a certain time or more in the acceleration generation interval (claim 1). (2) When an unusual acceleration is detected, a warning is issued to the driver immediately, so that data measurement for a certain time or more is not required. Further, since the driving state is determined for each vehicle speed zone, the storage capacity of the determination data is reduced, and the determination load can be reduced (claim 2). (3) Since the driver is given a degree of freedom without determining whether or not the driving operation of the driver is abnormal up to a predetermined number of times, it is determined that the driving is abnormal even if an emergency avoidance operation that can normally occur such as road conditions is performed. Nothing. Therefore, the alarm that operates in response to the abnormal operation does not accidentally operate (claim 3). (4) Since the driver-specific data is reflected and the driving state is determined with high accuracy and accuracy, a highly reliable warning can be issued (claim 4). (5) Further, since the current driver can be determined by the driver determining means for determining the driver, a determination suitable for each driver can be made (claim 5). (6) By storing the vehicle position information and the quick driving information together so that the driver or the operator can know the change in the driving state more accurately, it can be used for safe driving. (Claim 6). (7) Since the determination acceleration corresponding to the operation at night or during rainy weather is used, the driving state suitable for the traveling environment is determined. Therefore, safety can be improved (claim 7). (8) Abnormal operation information to the outside by communication means, that is,
Since the information on the rush driving is transmitted, the business operator and the like can perform appropriate management for safety (claim 8). (9) Since the warning is issued by the warning means, abnormal driving can be prevented (claim 9).

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system of a driving state detecting device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a rush judgment process according to the driving state detecting device according to the embodiment of the present invention;

FIG. 3 is a schematic diagram showing an embodiment in which rush driving data is transmitted using communication means according to the embodiment of the present invention.

FIG. 4 is a table showing a point and a time at which a rush operation is performed according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a system of a driving state detecting device according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating a hurry judgment process according to the driving state detecting device according to the second embodiment of the present invention.

FIG. 7 is a flowchart showing another embodiment of the urgency determination process according to the driving state detection device according to the second embodiment of the present invention.

FIG. 8 shows a driving state detection device according to an embodiment of the present invention, and shows the speed and the maximum acceleration of the own vehicle during one cool period from the start to the stop of the own vehicle for creating an acceleration distribution curve. FIG.

FIG. 9 shows a driving state detection device according to one embodiment of the present invention, and a distribution curve diagram of acceleration for each vehicle speed band for determining a rush driving state created based on the speed and the maximum acceleration of the own vehicle. FIG.

FIG. 10 is a diagram showing an operating state detecting device according to an embodiment of the present invention, showing a storage state of a basic distribution curve in a memory.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ECU 1a Judgment acceleration storage means 1b Acceleration comparison means 1c Driving state judgment means 1d Running information storage means 2 Warning means 3 Vehicle speed sensor 4 Acceleration sensor 5 Communication means (own vehicle side) 6 Communication means (business office side) 9 Gyro sensor ( Own vehicle position detecting means) 10 GPS (own vehicle position detecting means) 11 select switch (driver discriminating means) 12 wiper 13 headlight 21 ECU 21e maximum acceleration calculating means 21f judgment acceleration storage means 21g acceleration comparing means 21h driving state judgment Means 21i Travel information storage means

Claims (9)

[Claims] 1. A traveling speed detecting means for detecting a traveling speed of an own vehicle, an acceleration detecting means for detecting an acceleration of the own vehicle, and an acceleration when a driver is normally traveling is stored for each speed. Determination acceleration storage means, acceleration comparison means for comparing the acceleration detected by the acceleration detection means with the determination acceleration stored in the determination acceleration storage means for each vehicle speed, and a comparison result of the acceleration comparison means A driving state detection device comprising: driving state determination means for determining a driving state of a driver based on the driving state. 2. A traveling speed detecting means for detecting a traveling speed of the own vehicle, an acceleration detecting means for detecting an acceleration of the own vehicle, and a maximum acceleration calculation for calculating a maximum acceleration for each vehicle speed zone based on an output of the acceleration detecting means. Means, a determination acceleration storage means for storing the acceleration when the driver is running normally for each vehicle speed band, and a maximum acceleration calculated by the maximum acceleration calculation means and stored in the determination acceleration storage means. Acceleration comparing means for comparing the determined acceleration with each of the vehicle speed zones, and driving state determining means for determining a driving state of the driver based on a result of the comparison by the acceleration comparing means. Operating condition detection device. 3. The driving state detection device according to claim 1, wherein the driving state determination means is configured to determine an abnormal driving state when the acceleration of the own vehicle exceeds a value of the determination acceleration by a predetermined number of times. . 4. A travel information storage means for storing, as travel information, a travel speed detected by the travel speed detection means or an acceleration detected by the acceleration detection means, and the determination acceleration storage means based on the travel information. The driving state detection device according to any one of claims 1 to 3, wherein a value of the determination acceleration stored in the storage device is changed. 5. It has a driver discriminating means for discriminating a driver, and traveling information storage means for storing the traveling information for each driver, and using the traveling information stored in the traveling information storage means. The driving state detection device according to claim 4, wherein the value of the determination acceleration is changed for each driver. 6. A vehicle information detecting device for detecting a position of the own vehicle, wherein the traveling information is obtained by combining the determination result of the driving state determining device and the position information detected by the own vehicle position detecting device. 5. The storage device according to claim 4, wherein the storage unit stores the information.
Or the operating state detecting device according to claim 5. 7. A detecting means for detecting at least one of a lighting state of a headlight and an operation state of a wiper, wherein at least one of a lighting state of the headlight and an operation state of a wiper is provided. The driving state detection device according to any one of claims 1 to 6, wherein the value of the determination acceleration is corrected based on the determination. 8. A communication device for communicating with the outside of the vehicle, wherein when the driving state determining unit determines that the vehicle is in abnormal operation, the driving state is transmitted to an external receiving device via the communication unit. The operation state detection device according to any one of claims 1 to 7. 9. The driving state detection device according to claim 1, further comprising a warning unit that warns a driver based on a determination result of the driving state determination unit.