JP2001071833A - Information notifying device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To notify information on driving of a vehicle only when necessary. SOLUTION: This information notifying device for a vehicle is provided with a driving operation detecting means 3 for detecting the driving operation of a driver; a driving characteristic computing means 5b for computing the driving characteristic of the driver on the basis of the detected driving operation; driving characteristic recording means 6b, 7b for recording the driving characteristic of the driver; a driving characteristic change detecting means 5c for comparing the present driving characteristic with the past driving characteristic to detect the change of the driving characteristic; a notification necessity judging means 5c for judging the necessity of notifying the driver of information on driving on the basis of the change of the driving characteristic; and information notifying means 5c, 8 for notifying the information on driving with contents and by a method corresponding to the necessity of notifying the information. Unnecessary notification of information carried out in a conventional device is thereby prevented to notify accurate, effective information corresponding to the driving characteristic of the driver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle information notifying device for notifying information on driving of a vehicle.

[0002]

2. Description of the Related Art When driving in areas such as densely populated houses, school zones, and accident-prone sections, particularly where safe driving is required, the throttle valve opening and the transmission shift position at the time of starting are restricted. 2. Description of the Related Art There is known a safe driving support device that emits an alarm (for example, see Japanese Patent Application Laid-Open No. 8-326573).

[0003]

However, in the above-described conventional safe driving support device, an alarm is always issued when driving in a safe driving area. Also, even when driving safely according to the driver's own judgment, an alarm is issued unnecessarily, causing discomfort to the occupant and reducing the effect of the alarm when necessary due to familiarity with the alarm There is a problem.

[0004] It is an object of the present invention to provide a vehicle information notifying device for notifying information on the operation of a vehicle only when necessary.

[0005]

Means for Solving the Problems The invention of claim 1 will be described with reference to FIG. 1 showing the configuration of an embodiment. (1) The invention of claim 1 detects a driving operation of a driver Driving operation detecting means 3, driving characteristic calculating means 5b for calculating driving characteristics of the driver based on the detected driving operation,
Driving characteristic recording means 6b, 7 for recording the driving characteristics of the driver
b, operating characteristic change detecting means 5c for comparing the current operating characteristic with the past operating characteristic to detect a change in the operating characteristic,
A notification necessity determining unit 5c that determines a necessity of notifying the driver of information on driving based on a change in the driving characteristics;
It has information notifying means 5c and 8 for notifying information about driving by contents and methods according to the necessity of information notification. (2) In the vehicle information notifying device according to the second aspect, the driving characteristic calculating means 5b determines, as driving characteristics of the driver, a mental state characteristic value indicating a mental state of the driver, and at least one of an obstacle and a driving environment. A reaction situation characteristic value indicating the driver's reaction is calculated, and the notification necessity determination unit 5c calculates
The necessity of information notification is determined based on the mental situation characteristic value and the reaction situation characteristic value. (3) In the vehicle information notifying device according to the third aspect, the driving characteristic calculating unit 5b determines, as driving characteristics of the driver, a mental state characteristic value indicating a mental state of the driver, and at least one of an obstacle and a driving environment. A reaction situation characteristic value indicating the driver's reaction is calculated, and the notification necessity determination unit 5c calculates
The mental situation characteristic value and the reaction situation characteristic value are compared with respective threshold values, and the necessity of information notification is determined based on the comparison result. (4) A vehicle information notifying device according to a fourth aspect of the present invention includes a current position detecting means 1 for detecting a current position of the vehicle, a vehicle behavior detecting means 2 for detecting a behavior of the vehicle, and a vehicle behavior detecting value of a vehicle whose vehicle behavior detected value exceeds a predetermined value. Emergency state detection means 5a for detecting an emergency state
And emergency state recording means 6a and 7a for recording an emergency state occurrence place and an emergency state occurrence time. The notification necessity determination means 5c considers the emergency state occurrence place, the emergency state occurrence time, the current location and the vehicle behavior. Thus, the necessity of information notification is determined. (5) The vehicle information notification device according to claim 5, wherein the notification necessity determining means 5c determines the necessity of information notification as the emergency state recording amount of the emergency state recording means 6a, 7a increases. It is. (6) In the vehicle information notification device according to claim 6, the mental condition characteristic value includes a maximum speed, an average speed, an average deceleration, a rapid acceleration frequency, an average inter-vehicle time, a horn frequency, and an average driving time of the vehicle, The response situation characteristic value includes a sudden deceleration frequency, an average brake allowance time, an average pedal change time, an average steering allowance time, and an average steering acceleration peak value time interval. (7) In the vehicle information notification device according to claim 7, the traveling environment of the vehicle includes rainy weather traveling, daytime traveling, and nighttime traveling.

In the section of the means for solving the above-described problem, a diagram of one embodiment is used for easy understanding of the description, but the present invention is not limited to this embodiment. .

[0007]

(1) According to the invention of claim 1, the driving characteristics are calculated and recorded based on the driving operation of the driver, and the current driving characteristics and the past driving characteristics are compared to determine the driving characteristics. Detect changes. Then, the necessity of informing the driver of information on driving based on the change in driving characteristics is determined, and the information on driving is notified by the content and method according to the necessity of information notification. Such unnecessary information notification can be prevented, accurate and effective information notification according to the driving characteristics of the driver can be performed, and a high information notification effect can be obtained. (2) According to the invention of claim 2, as the driving characteristics of the driver, a mental status characteristic value indicating a mental state of the driver, and a reaction status characteristic indicating a response of the driver to at least one of an obstacle and a driving environment. The value is calculated, and the necessity of information notification is determined based on the mental situation characteristic value and the reaction situation characteristic value, so that the driving characteristic of the driver can be accurately analyzed. The effect can be further enhanced. (3) According to the invention of claim 3, as the driving characteristics of the driver, a mental situation characteristic value indicating the mental state of the driver, and a reaction situation characteristic indicating the reaction of the driver to at least one of the obstacle and the driving environment. Values, the mental situation characteristic value and the reaction situation characteristic value are compared with the respective threshold values, and the necessity of information notification is determined based on the comparison result. Can be accurately analyzed, the above-described effect of claim 1 can be further enhanced, and more effective and detailed information notification can be performed for each driver. (4) According to the invention of claim 4, the emergency state of the vehicle is detected and recorded, and the necessity of information notification is determined in consideration of the emergency location, the emergency time, the current location, and the vehicle behavior. Therefore, in addition to the above effects of claims 1 to 3,
It is possible to perform accurate and effective information notification according to the traveling environment. (5) According to the invention of claim 5, since the number of emergency state recording elements is increased, the necessity of information can be determined to be high, and more accurate information provision can be performed. (6) According to the sixth aspect of the present invention, the maximum speed, acceleration / deceleration, horn frequency, and the like are used as the mental situation characteristic values, and the pedal depressing time, the steering allowance time, and the like are used as the reaction situation characteristic values. Can be determined. (7) According to the invention of claim 7, the distinction between the weather and day and night is used as the traveling environment, so that a more accurate determination can be made.

[0008]

FIG. 1 shows a configuration of an embodiment. The GPS receiver 1 constitutes a current position detecting means for detecting a current position of a vehicle which is a driving environment by satellite navigation. The vehicle signal detection device 2 outputs control signals such as a vehicle speed detected by various sensors, acceleration / deceleration in the front-rear direction and lateral direction of the vehicle, a yaw rate, and a control signal such as turning on / off a warning light. Has formed. With these detection signals and control signals, the behavior of the vehicle such as an emergency state described later can be detected.

The operation signal detecting device 3 detects signals such as accelerator opening, brake fluid pressure, and steering angular velocity detected by various sensors, and operation signals of vehicle operating members such as lamps, turn signals, shift positions, and wipers. Is output. With these operation signals, characteristics relating to the driver's driving operation and driving environments such as night driving and rainy weather driving can be detected, forming driving operation detecting means. The inter-vehicle distance detecting device 4 detects a preceding vehicle which is an obstacle and measures the inter-vehicle distance by using a laser radar, a stereo camera, or the like.

The signal processing controller 5 comprises a microcomputer and peripheral parts (not shown) such as a ROM, a RAM and an A / D converter.
a, a signal processing unit 5b and an information notification determination unit 5c.

[0011] The emergency state detection unit 5a includes a GPS receiver 1,
Based on various signals input from the vehicle signal detection device 2, the operation signal detection device 3, and the inter-vehicle distance detection device 4, a state in which the behavior of the vehicle is abnormal, that is, a state in which the behavior of the vehicle exceeds a predetermined value, is detected as an emergency state. It constitutes an emergency state detecting means.

In this embodiment, when the deceleration in the vehicle longitudinal direction exceeds a predetermined value, for example, 0.8 G, when the peak value time interval of the steering angular velocity becomes a predetermined value, for example, 0.3 sec or less, the vehicle When the lateral acceleration exceeds a predetermined value, for example, 0.8 G, an emergency state is set when the yaw rate exceeds a predetermined value, for example, 100 deg / sec.

The peak value time interval of the steering angular velocity is, as shown in FIG. 2, the time T1, T2,... Between adjacent peak values on the positive or negative side of the steering angular velocity. The shorter the peak value time interval of the steering angular velocity, the quicker the driver's steering operation was performed.

The signal processing unit 5b is adapted to drive the driver as shown in Table 1 based on various signals input from the GPS receiver 1, the vehicle signal detector 2, the operation signal detector 3, and the inter-vehicle distance detector 4. A characteristic value relating to the operation is calculated to constitute a driving characteristic calculating means.

[Table 1]

In Table 1, driving characteristic values 1 to 7 are characteristic values sn (n = 1 to 7) indicating the mental state of the driver, and the mental state of the driver is determined based on these mental state characteristic values sn. It is determined whether the vehicle is in a state favorable for safe driving. The rapid acceleration rate of the mental condition characteristic value s4 indicates the frequency of rapid acceleration during acceleration, and is (number of times of rapid acceleration) / (total number of times of acceleration). The average inter-vehicle time of the characteristic value s5 is the average value of (inter-vehicle distance to preceding vehicle) / (relative speed to preceding vehicle).

On the other hand, the driving characteristic values 8 to 12 are characteristic values r indicating the driver's reaction to obstacles including the preceding vehicle and the driving environment.
n (n = 8 to 12), and these reaction situation characteristic values r
Based on n, it is determined whether or not the driver's reaction situation is in a state favorable for safe driving. The rapid deceleration rate of the reaction situation characteristic value r8 indicates the frequency of rapid deceleration during deceleration, and is (number of times of rapid deceleration) / (total number of times of deceleration). The average brake margin time of the characteristic value r9 is an average value of (distance to obstacle) / (relative speed to obstacle) at the time when the brake pedal is depressed. The average pedal change time of the characteristic value r10 is an average value of the accelerator pedal and the brake pedal change time. The average steering allowance time of the characteristic value r11 is (the distance to the obstacle) / (the relative speed with respect to the obstacle) at the time when the steering is operated. Further, the average steering peak interval of the characteristic value r12 is:
This is the average value of the peak time intervals of the steering angular velocity described above. The type and number of the operation characteristic values are not limited to this embodiment.

The information notification determining unit 5c of the controller 5
Constitutes a driving characteristic change detecting means for detecting a change in the driving characteristic value between the current operation and the past operation recorded in the recording devices 6 and 7 which are driving characteristic recording means to be described later. Based on the information, a notification necessity determining means for determining whether or not it is necessary to notify the driver of information regarding driving of the vehicle is configured, and if it is necessary to notify, information according to the necessity of the information notification The contents are notified by the notifying means according to the necessity of the information notification. The information on the driving includes a proposal of a break, a promotion of safe driving, a proposal of an end of driving immediately, and the like.

The recording device 6 is a fixed non-volatile memory, and has an emergency state recording unit 6a and a current operation recording unit 6b. The emergency state recording unit 6a records the details of the emergency state encountered by all the drivers, the place of occurrence and the date and time of occurrence, and the current operation recording unit 6b records the driving characteristic values sn and rn of the driver during the current operation. Record In addition, this time operation recording part 6
The recorded contents of b are deleted after the current operation is completed.

The recording device 7 is a detachable non-volatile memory, and has an emergency state recording unit 7a and a past operation recording unit 7b. This recording device 7 is prepared for each driver,
Prior to the start of operation, it is used by attaching it to a predetermined place in the passenger compartment. The emergency status recording unit 7a records the emergency status of the driver having the recording device 7 during the past operation, and additionally records the details of the emergency status encountered during the current operation, the location and the date and time of occurrence. I do. Past operation record part 7b
Records the past driving characteristic values sn and rn of the driver having the recording device 7 and their increase / decrease rates snd and rnd, and at the end of the current operation, the driving characteristic values of the current operation and the past operation. The driving characteristic value is updated based on the. The emergency state recording units 6a and 7a of these recording devices 6 and 7 constitute an emergency state recording unit.

It is to be noted that only a large-capacity fixed recording device is installed in a vehicle, a recording area is allocated to each driver, and the ID of the driver is confirmed at the start of operation, and an emergency state is recorded in the recording area of the driver at the time of operation. May be recorded.
The types of the recording devices 6 and 7 are not particularly limited, and a semiconductor memory, a hard disk, or the like can be used. Further, the information on the emergency state can be used to determine the cause of the occurrence of an accident or the like.

The information notifying device 8 as information notifying means includes:
A display (not shown) and a speaker (not shown) notify the driver of driving information.

FIG. 3 is a flowchart showing an information notification processing program. The operation of the embodiment will be described with reference to this flowchart. The microcomputer of the signal processing controller 5 executes the information notification processing program at predetermined time intervals while an ignition key switch (not shown) of the vehicle is on.

In step 1, it is confirmed whether or not the recording device 7, which records the past driving characteristic values for each driver, the emergency occurrence location, and the occurrence date and time, is mounted at a predetermined location of the vehicle. If it is not mounted, the process proceeds to step 2, where the information notification device 8 notifies the driver that the recording device 7 of the driver is to be mounted at a predetermined location, and returns to step 1.

When the recording device 7 of the driver is mounted, the process proceeds to step 3 and signal detection by the GPS receiver 1, the vehicle signal detection device 2, the operation signal detection device 3, and the inter-vehicle distance detection device 4 is started. In step 4, it is confirmed whether or not the above-described emergency condition is detected. If the emergency condition is detected, the process proceeds to step 5, and if the emergency condition is not detected, the process proceeds to step 6. If an emergency condition is detected, the contents, location and date and time of occurrence of the emergency condition are recorded in the emergency condition recording units 6a and 7a in step 5.

In step 6, based on various signals input from the GPS receiver 1, the vehicle signal detector 2, the operation signal detector 3, and the inter-vehicle distance detector 4 during a predetermined time, for example, five minutes before the present. Therefore, the driving characteristic values shown in Table 1 above, that is, the mental situation characteristic values sn (n = 1
7) and the reaction situation characteristic value rn (n = 8 to 12) are calculated and recorded in the current operation recording unit 6b. Next step 7
Then, the notification necessity calculation routine shown in FIG. 4 is executed, and the notification necessity N of the information on the driving is calculated.

In step 21 of FIG. 4, the current operation characteristic value (here, the operation characteristic value from 5 minutes ago to the present) recorded in the current operation recording unit 6b is used.
7), rn (n = 8 to 12) are read, and in a subsequent step 22, past operation characteristic values sn (n = 1 to 7) and rn (n = 8) recorded in the past operation recording unit 7b. ~
12) is read. In step 23, the mental state characteristic index calculation routine shown in FIG. 5 is executed, and the mental state characteristic index Sn (n) for each mental state characteristic value sn (n = 1 to 7).
= 1 to 7).

In step 41 of FIG. 5, the rate of increase / decrease snd (n = 1 to 7) of the mental state characteristic value is calculated based on the present and past mental state characteristic values sn by the following equation.

Snd = ((current characteristic value sn)-(past characteristic value sn)) / (past characteristic value sn) × 100 Next, in steps 42 to 46, the rate of change sn of the mental situation characteristic value is calculated.
d is compared with threshold values L1n, L2n (<L1n) (n = 1 to 7), and if snd ≧ L1n, a predetermined value An (n = 1 to 7) is set to the mental situation characteristic index Sn, and L1n If> snd ≧ L2n, the mental state characteristic index Sn is a predetermined value Bn (n = 1 to 7)
Is set, and if snd <L2n, a predetermined value Cn (n = 1 to 7) is set to the mental situation characteristic index Sn.

After calculating the mental state characteristic index Sn, in step 24 of FIG. 4, the mental state characteristic index Sn (n = 1 to 1)
The mental situation analysis index S is calculated by the integration of 7).

S = ΣSn where Σ represents the summation operation of n = 1 to 7. In the subsequent step 25, a reaction situation characteristic index calculation routine shown in FIG. 6 is executed to calculate a reaction situation characteristic index Rn (n = 8 to 12) for each reaction situation characteristic value rn (n = 8 to 12).

In step 51 of FIG. 6, the rate of change rnd (n = 8 to 12) of the reaction state characteristic value is calculated by the following equation based on the current and past reaction state characteristic value rn.

## EQU3 ## rnd = ((current characteristic value rn)-(past characteristic value rn)) / (past characteristic value rn) .times.100 Next, in steps 52 to 56, the rate of change rn of the reaction situation characteristic value rn
d is compared with threshold values L1n, L2n (<L1n) (n = 8 to 12). If rnd ≧ L1n, a predetermined value An (n = 8 to 12) is set to the reaction situation characteristic index Rn. > Rnd ≧ L2n
Then, a predetermined value Bn (n = 8 to
12) is set, and if rnd <L2n, a predetermined value Cn (n = 8 to 12) is set in the reaction situation characteristic index Rn.

At step 26 in FIG. 4 after calculating the reaction situation characteristic index Rn, the reaction situation characteristic index Rn (n = 8 to
A reaction situation analysis index R is calculated by the integration of 12).

R = ４Rn Here, Σ represents a sum operation of n = 8-12. Next, in step 27, an environment coefficient calculation routine shown in FIG. 7 is executed to calculate an environment coefficient E indicating the quality of the driving environment.

Here, threshold values L1n, L2n (n = 1 to 1)
Table 2 shows an example of 2) and the predetermined values An, Bn, and Cn (n = 1 to 12).

[Table 2] As shown in Table 3, weights may be assigned to the predetermined values An, Bn, and Cn of the mental situation characteristic index Sn and the reaction situation characteristic index Rn.

[Table 3]

In steps 61 to 63 in FIG. 7, it is checked whether or not the current position is a past emergency occurrence position. If it is a place where an emergency occurs, a predetermined value a is set to the environmental characteristic value e1, and if not, a predetermined value b is set to the environmental characteristic value e1. In steps 64-66, it is checked whether the current time is a past emergency occurrence time. If it is an emergency occurrence time, a predetermined value c is set to the environmental characteristic value e2, and if not, a predetermined value d is set to the environmental characteristic value e2. Step 67
In steps 69 to 69, it is confirmed whether or not the vehicle is traveling on rainy weather, which is one of the indicators of the traveling environment. If the vehicle is traveling on rainy weather, the environment characteristic value e3 is set to a predetermined value f. A predetermined value g is set. Here, for example, when the operation of the wiper is detected by the operation signal detection device 3, it is assumed that the vehicle is traveling on rainy weather.

Table 4 shows an example of the predetermined values a, b, c, d, f, and g.

[Table 4]

At step 70, the environmental characteristic value e1,
An environment coefficient E is obtained from the following equation based on e2 and e3.

E = e1 × e2 × e3 As described above, in the present embodiment, in addition to the location, a lot of information such as time and weather is processed as an emergency state recording element. Warnings). It should be noted that daytime running and nighttime running, which are indicators of the running environment, are detected in accordance with the turning on / off state of the lamps, an environmental characteristic value e4 for daytime running and nighttime running is set, and this environmental characteristic value e4 is used. The environment coefficient E may be calculated. In this case, the environmental characteristic value e4 in the night driving is larger than that in the day driving.

Mental situation analysis index S, reaction situation analysis index R
After calculating the environmental coefficient E and the environmental coefficient E, in step 28 of FIG. 4, the necessity N of information notification is calculated based on the mental situation analysis index S and the reaction situation analysis index R as shown in the following equation.

[Mathematical formula-see original document] N = (S + R) * E Note that the current mental situation analysis index S and reaction situation analysis index R
May be used after a predetermined time has elapsed after the start of operation, and a predetermined value may be used until then.

In steps 29 to 33, the necessity N of information notification is compared with thresholds P1 and P2 (<P1), and N
If ≧ P1, the degree of necessity is determined to be “large”, if P1> N ≧ P2, the degree of necessity is “medium”, and if N <P2, the degree of necessity is determined to be “small”. The thresholds P1 and P2 are, for example, P1 = 50,
P2 = 40.

After calculating the information necessity N, the program returns to the information notification processing program of FIG. 3 and checks in step 8 whether information notification is necessary. If the degree of information notification is large or medium, the notification is necessary and the process proceeds to step 9 to select an information notification method. Specifically, in the case where the notification necessity is high, the volume of the speaker is increased to notify the information on driving. In addition, when the notification necessity is in the middle, the volume of the speaker is set to a medium level and the information about the driving is reported. The information on the driving includes proposals and warnings for safe driving, such as a proposal to end the operation immediately and a proposal to take a break for a while. The sound may be changed or displayed on a display according to the necessity of notification. In step 10, information is notified in accordance with the notification necessity by the notification method selected by the information notification device 8.

In step 11, it is confirmed whether or not the operation has been completed. For example, if the ignition switch is turned off, it is determined that the current operation has been completed and step 1 is performed.
Proceed to 2 and if the operation is not completed, return to step 3 and repeat the series of information notification processing described above.

When the current operation is completed, step 1
2, the operation characteristic values sn and rn recorded during the current operation recorded in the current operation recording unit 6b and the operation characteristic values s during the past operation recorded in the past operation recording unit 7b.
The driving characteristic values sn and rn are recalculated based on n and rn, and the recorded contents of the past operation recording unit 7b are updated with the newly calculated driving characteristic values sn and rn. After that, the recorded contents of the current operation recording unit 6b are deleted, and the process is terminated.

By updating the driving characteristic values sn and rn for each operation, it is possible to improve the driving technique for each driver and to cope with deterioration of the vehicle braking performance due to tire wear. The driving characteristic values and emergency state information after two hours or more have elapsed since the start of the operation are data in a state where the degree of fatigue of the driver is high, and since the reliability is low, the driving characteristic values are updated. It may not be used.

As described above, according to this embodiment, the driving characteristics are calculated and recorded based on the driving operation of the driver, and the changes in the driving characteristics are compared by comparing the current driving characteristics with the past driving characteristics. To detect. Then, the necessity of informing the driver of information on driving based on the change in driving characteristics is determined, and the information on driving is notified by the content and method according to the necessity of information notification. Such unnecessary information notification can be prevented, accurate and effective information notification according to the driving characteristics of the driver can be performed, and a high information notification effect can be obtained.

Further, as driving characteristics of the driver, a mental state characteristic value indicating a mental state of the driver and a reaction state characteristic value indicating a reaction of the driver to obstacles and a driving environment are calculated.
Since the necessity of information notification is determined based on the sum of the mental situation characteristic value and the reaction situation characteristic value, the driving characteristic of the driver can be accurately analyzed, and the above effect can be further enhanced. .

Further, the emergency state of the vehicle is detected and recorded,
Since the necessity of information notification is determined in consideration of the emergency state occurrence location, the emergency state occurrence time and the driving environment,
In addition to the above effects, accurate and effective information notification according to the traveling environment can be performed.

It should be noted that there is a distinction between daytime driving and nighttime driving, weather such as rainy weather and fog, and general road driving and highway driving.
The driving characteristic values may be classified and recorded for each driving pattern, and the past driving characteristic value of the same driving pattern as the current driving pattern may be compared with the current driving characteristic value to calculate the necessity of information notification. .

<< Modification of One Embodiment of the Invention >> A description will be given of a modification in which predetermined values An, Bn, and Cn of the mental situation characteristic index Sn and the reaction situation characteristic index Rn are updated in response to occurrence of an emergency state. I do.

FIG. 8 shows the predetermined values A of the characteristic indices Sn and Rn.
It is a flowchart which shows the update process of n and Bn. This processing is executed after executing step 12 of the information notification processing program according to the embodiment shown in FIG. In step 81, it is confirmed whether or not there is a record of the emergency state in the emergency state recording unit 7a for each driver, and if there is no record of the occurrence of the emergency state in the past, the process ends.

If there is a record of the occurrence of an emergency condition, in step 82, the mental situation characteristic value sn (n = 1 to 7) and the reaction situation characteristic at the time of occurrence of the emergency condition, which are recorded in the past operation recording unit 7b. The value rn (n = 8 to 12) is read.

In the following step 83, predetermined values An, Bn, Cn of the mental condition characteristic index Sn (n = 1 to 7) are calculated by the following equations.
(N = 1 to 7) and a weight coefficient Dsn (n = 1 to 7) and an initial value A of predetermined values An, Bn, and Cn (n = 1 to 7)
0n, B0n, and the total value At, B of C0n (n = 1 to 7)
Calculate t and Ct.

Dsn = Σsn / Σ (Σsn), At = ΣA0n = A01 + A02 +... + A07, Bt = ΣB0n = B01 + B02 +. + B07, Ct = ΣC0n = C01 + C02 +. + C07個 sn
Indicates m sums for each mental situation characteristic value sn (n = 1 to 7). That is,

８s1 = (s1 of emergency record 1) + ... + (s1 of emergency record m), Σs2 = (s2 of emergency record 1) + ... + (s2 of emergency record m) Σ, ・ s7 = (s7 of emergency record 1) + ... + (s7 of emergency record m)

Σ (Σsn) is

９ (Σsn) = Σs1 + Σs2 +... + Σs7.

Ds1 = Σs1 / Σ (Σsn), Ds2 = Σs2 / Σ (Σsn), Ds7 = Σs7 / Σ (Σsn)

In step 84, using the calculated weighting factors Dsn (n = 1 to 7), predetermined values An, Bn, Cn (n) of the mental situation characteristic index Sn (n = 1 to 7) are calculated by the following equations.
= 1 to 7) and update.

Dsn × At → An (n = 1 to 7), Dsn × Bt → Bn (n = 1 to 7), Dsn × Ct → Cn (n = 1 to 7)

Next, at step 85, predetermined values An, Bn, C of the reaction situation characteristic index Rn (n = 8 to 12) are calculated by the following equations.
n (n = 8 to 12) with a weight coefficient Drn (n = 8 to 1)
2) and the total values At, Bt, Ct of the initial values A0n, B0n, C0n (n = 8-12) of the predetermined values An, Bn, Cn (n = 8-12) are calculated.

Drn = Σrn / Σ (Σrn), At = ΣA0n = A08 + A09 +... + A012, Bt = ΣB0n = B08 + B09 +... + B012, Ct = ΣC0n = C08 + C09 +... + C012個 rn
Indicates m totals for each reaction state characteristic value rn (n = 8 to 12). That is,

１３r8 = (r8 of emergency record 1) + ... + (r8 of emergency record m), Σr9 = (r9 of emergency record 1) + ... + (r9 of emergency record m) Σ, ・ r12 = (r12 of emergency record 1) + ... + (r12 of emergency record m)

Σ (Σrn) is

１４ (Σrn) = Σr8 + Σr9 +... + Σr12.

[Equation 15] Dr8 = Σr8 / Σ (Σrn), Dr9 = Σr9 / Σ (Σrn), ··· Dr12 = Σr12 / Σ (Σrn)

In step 86, using the calculated weighting coefficients Drn (n = 8 to 12), predetermined values An, Bn, Cn of the reaction situation characteristic index Rn (n = 8 to 12) are calculated by the following equation.
(N = 8 to 12) is weighted and updated.

Drn × At → An (n = 8 to 12), Drn × Bt → Bn (n = 8 to 12), Drn × Ct → Cn (n = 8 to 12)

As described above, according to this modified example, the change rate of the driving characteristic value at the time of occurrence of an emergency condition for each driver is determined by
Since the characteristic indexes of the mental state and the reaction state are weighted, in addition to the effects of the above-described embodiment, it is possible to sufficiently reflect the driving characteristics of each driver when determining the necessity of information notification. Thus, accurate and effective information notification according to the driving characteristics and the driving environment of the driver can be performed.

<< Another Modification of One Embodiment of the Invention >> In the above-described embodiment, the necessity N of the information notification is obtained by multiplying the sum of the mental situation analysis index S and the reaction situation analysis index R by the environmental coefficient E. Has been described, and the information notification is performed by the notification content and the notification method according to the notification necessity N. In this modification, the content and method of information notification are determined by separately evaluating the mental status analysis index S and the reaction status analysis index R.

FIG. 9 is a flowchart showing the information notification processing of this modification. In addition, illustration and description of the same processes as those in the above-described embodiment will be omitted, and differences will be mainly described. First, in steps 91 and 92, a mental situation analysis index S and a reaction situation analysis index R are obtained as in steps 21 to 26 in FIG. Each of these indices S and R has such a property that the greater the value, the higher the necessity of information notification. Steps 93, 95, 97
, The mental state analysis index S and the reaction state analysis index R are compared with threshold values YS and YR, respectively, and the content and method of information notification are determined based on the comparison result.

If the mental situation analysis index S is smaller than the threshold value YS and the reaction situation analysis index R is smaller than the threshold value YR, the process proceeds from step 93 to step 94, where it is determined that no information notification is necessary, and the processing is performed. finish. Mental situation analysis index S
Is greater than or equal to the threshold value YS and the reaction situation analysis index R is smaller than the threshold value YR, the routine proceeds from step 95 to step 96, where the information notifying device 8 notifies the driver of information that prompts the driver to take a break.

The mental state analysis index S is equal to the threshold value YS.
Smaller and the reaction situation analysis index R is equal to the threshold value YR
In the above case, the process proceeds from step 97 to 98, and the information notifying device 8 notifies information for promoting a relaxed driving.
Further, when the mental condition analysis index S is equal to or more than the threshold value YS and the reaction condition analysis index R is equal to or more than the threshold value YR, the process proceeds from step 97 to 98, and the information notification device 8 stops driving immediately. Notify the information that prompts.

These information notifications are sent to the information notification device 8
However, a warning buzzer may be sounded according to the information notification content. In this case, for example, the information notification urging the stop of the operation is set to the maximum volume.

Further, the mental condition analysis index S and the reaction condition analysis index R are multiplied by the above-mentioned environmental coefficient E, and the information notification contents and the notification method in steps 93 to 99 are determined based on those values. Good.

As described above, according to this modification, the mental situation characteristic value and the reaction situation characteristic value are compared with the respective threshold values, and the necessity of information notification is determined based on the comparison result. Therefore, the driving characteristics of the driver can be accurately analyzed, and the above-described effect of the embodiment can be further enhanced. In addition, more effective and detailed information notification can be performed for each driver. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment.

FIG. 2 is a diagram for explaining a peak value time interval of a steering angular velocity.

FIG. 3 is a flowchart showing an information notification processing program.

FIG. 4 is a flowchart illustrating a routine for calculating a notification necessity degree.

FIG. 5 is a flowchart illustrating a routine for calculating a mental situation characteristic index Sn.

FIG. 6 is a flowchart showing a routine for calculating a reaction situation characteristic index Rn.

FIG. 7 is a flowchart illustrating a routine for calculating an environmental coefficient E;

FIG. 8 is a flowchart showing a process of updating predetermined values An and Bn according to a modified example.

FIG. 9 is a flowchart illustrating an information notification process according to another modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 GPS receiver 2 Vehicle signal detection device 3 Operation signal detection device 4 Inter-vehicle distance detection device 5 Controller 5a Emergency state detection unit 5b Signal processing unit 5c Information notification determination unit 6 Recording device 6a Emergency state recording unit 6b Current operation recording unit 7 Recording device 7a Emergency status recording unit 7b Past operation recording unit 8 Information notification device

Claims (7)

[Claims] 1. A driving operation detecting means for detecting a driving operation of a driver, a driving characteristic calculating means for calculating a driving characteristic of the driver based on the detected driving operation, and a driving characteristic for recording the driving characteristic of the driver. A recording means, a driving characteristic change detecting means for detecting a change in the driving characteristic by comparing the current driving characteristic with a past driving characteristic, and a necessity of notifying the driver of driving information based on the driving characteristic change. A vehicle information notification device, comprising: a notification need determination unit that determines the vehicle information; and an information notification unit that notifies information about driving by a content and a method according to the necessity of the information notification. 2. The vehicle information notifying device according to claim 1, wherein the driving characteristic calculating means includes, as driving characteristics of the driver, a mental situation characteristic value indicating a mental state of the driver, an obstacle and a driving environment. A response situation characteristic value indicating the driver's response to at least one of the following: the notification necessity determination unit determines the necessity of information reporting based on the mental situation characteristic value and the reaction situation characteristic value. An information notification device for a vehicle, comprising: 3. The information notification device for a vehicle according to claim 1, wherein the driving characteristic calculating means includes, as driving characteristics of the driver, a mental situation characteristic value indicating a mental state of the driver, an obstacle, and a driving environment. A response situation characteristic value indicating a response of the driver to at least one of the above, the notification necessity determining means compares the mental situation characteristic value and the reaction situation characteristic value with respective thresholds, and calculates An information notification device for a vehicle, wherein the necessity of information notification is determined based on a comparison result. 4. The vehicle information notifying device according to claim 1, wherein a current position detecting means for detecting a current position of the vehicle, a vehicle behavior detecting means for detecting a behavior of the vehicle, An emergency state detection means for detecting an emergency state of the vehicle having a detected value exceeding a predetermined value; and an emergency state recording means for recording an emergency state occurrence location and an emergency state occurrence time, wherein the notification necessity determination means includes an emergency state An information notification device for a vehicle, which determines the necessity of information notification in consideration of an occurrence location, an emergency state occurrence time, a current location, and a vehicle behavior. 5. The information notification device for a vehicle according to claim 4, wherein the notification necessity determining unit determines that the information notification necessity is determined to be higher as the number of emergency state recording elements of the emergency state recording unit increases. Characteristic vehicle information notification device. 6. The vehicle information notification device according to claim 2, wherein the mental condition characteristic value includes a maximum speed, an average speed, an average deceleration, a rapid acceleration frequency, and an average headway of the vehicle. Time, horn frequency, average driving time, and the reaction situation characteristic values include sudden deceleration frequency, average brake margin time, average pedal depressing time, average steering margin time, average steering acceleration peak value time interval. An information notification device for a vehicle, comprising: 7. The vehicle information notification device according to claim 4, wherein the running environment of the vehicle includes rainy running, daytime running, and nighttime running. Information notification device.