JP3762954B2 - Safe driving support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a safe driving support device that detects the possibility of a vehicle coming into contact with another vehicle or an obstacle and gives a warning to a driver to prevent a contact accident in advance.
[0002]
[Prior art]
Conventionally, many devices for supporting safe driving of vehicles have been proposed, and various experiments have been conducted. For example, processing the image obtained from the camera attached to the front of the vehicle, recognizing the lane, identifying the vehicle in front, measuring the time it takes for the reflected light to return by applying a laser beam to the vehicle To measure the inter-vehicle distance from the vehicle ahead and control the throttle opening so that the inter-vehicle distance is constant, or if the inter-vehicle distance is still short, an alarm is sounded first, and if the inter-vehicle distance is further shortened, downshift and It is a system that applies a brake.
[0003]
In addition to the method of using a laser beam to measure the distance between vehicles ahead, a millimeter wave radar, an ultrasonic sensor, etc. have been studied, and stereo ranging using two cameras has been proposed. In addition, a specific method has also been proposed that uses a warning and a brake timing determination to predict a time until a collision rather than an inter-vehicle distance (Japanese Patent Laid-Open No. 5-166097). Further, a method has been proposed in which the determination timing is automatically adjusted to the driver's reaction time (Japanese Patent Laid-Open No. 7-159525).
[0004]
Now, an example of a conventional safe driving support device will be described with reference to FIG. FIG. 9 is a schematic block diagram of a conventional safe driving support apparatus. First, the physical quantity for calculating the risk degree of the vehicle is measured by the sensor 1. Typical examples of the physical quantity are a distance from the preceding vehicle and a relative speed with the preceding vehicle. In some cases, the vehicle speed / acceleration, ON / OFF information of brakes and direction indicators are detected. As an actual sensor, a millimeter wave radar, an image recognition device using a camera, or the like is used. Here, for the sake of simplicity, a case will be described in which a distance / relative speed detector with a preceding vehicle using a millimeter wave radar is used as a sensor.
[0005]
The distance / relative speed with the preceding vehicle detected by the sensor 1 is input to the risk degree calculation device 2. The degree of risk is represented by the time until a collision occurs when the traveling state of the host vehicle or the preceding vehicle remains unchanged. That is, it is the time for how many seconds the vehicle touches the preceding vehicle when traveling without entering the deceleration operation.
[0006]
This time calculation is simple and is obtained by dividing the distance to the preceding vehicle by the relative speed to the preceding vehicle. Actually, when the safe driving support device works effectively, the vehicle ahead is often decelerating, so the relative acceleration, which is the time change rate of the relative speed with the vehicle ahead, is calculated and contacted with the vehicle ahead. There is also a method for more accurately obtaining the time until.
[0007]
The time until contact with the preceding vehicle calculated in this manner is input to the risk determination device 3 and compared with the risk determination threshold 4. When the risk level calculated by the risk level calculation device 2 is greater than the risk level determination threshold value 4, a warning generation command is sent to the warning generation device 5, and the driver is in a dangerous state with a warning sound or the like. Tell them that there is.
[0008]
As this warning sound, a sound such as “pea”, “boo”, or the like that makes the driver tense and promptly performs a subsequent danger avoiding operation is used. Also, the risk determination threshold 4 is determined to be 4 seconds, for example. This risk determination threshold value is determined by the driver's recognition of a warning sound, the driver himself / herself judging that it is actually in a dangerous state, and entering a deceleration operation without causing a sudden braking. The time is set so that the vehicle can decelerate. Alternatively, the risk determination threshold 4 may be a function of the speed of the host vehicle. Furthermore, there is a system that sends a command to an actuator that automatically closes the accelerator, downshifts, and automatically brakes, but only the system that generates a warning is introduced here.
[0009]
The above is a case where the time until the collision is used as the risk level, but a system in which the distance between the vehicles is simply set as the risk level is also conceivable.
[0010]
In this way, even if the driver feels like driving or is driving aside, the driver is notified that the vehicle is in a dangerous state by a warning, thereby reducing unnecessary rear-end collision accidents. Is possible.
[0011]
[Problems to be solved by the invention]
These technologies will lead to automated driving in the future, but for the time being, they are technologies for assisting human drivers unless they are roads dedicated to automated driving. This is because human comprehensive recognition and judgment ability is far superior to the current mechanical system.
[0012]
In particular, it is well known that the ability to collect information visually is far superior to current image processing recognition technology. Even when the distance between vehicles is actually maintained, not only the previous vehicle but also the position of the previous vehicle, the situation in front of it, the weather, the situation of surrounding vehicles, and the load capacity of the own vehicle The human being controls the vehicle by comprehensively judging the driving ability and fatigue level of the driver.
[0013]
When trying to realize these with a mechanical system, it is possible to recognize, judge and control more advanced than humans in part, but it is not as comprehensive as humans. Even if we make use of the latest state-of-the-art technology to create a mechanical system close to human ability, it will be very expensive. Until an inexpensive mechanical system is developed in the future that is comparable to human capabilities, the mechanical system is expected to play an auxiliary role for human drivers.
[0014]
Let's take a concrete look at this auxiliary role. Here, it is not the purpose of “dedicated to the driver to drive safely by making the driver easier,” represented by navigation devices, auto-cruise, and power steering. Think of it only for mechanical systems that aim to avoid danger by informing the driver and controlling the vehicle.
[0015]
There are two types of danger that the driver is not aware of: One is a difficult danger even if a human tries to recognize it like a vehicle in a blind spot. The second is a danger when the driver is not fully committed to safe driving, such as inadvertently, side by side, or snoring. The former is more problematic because it is possible to avoid danger by sufficiently confirming safety. Furthermore, the latter is a big problem for a system that assists the driver and supports safe driving.
[0016]
For example, considering the inter-vehicle distance warning, there is a time lag before the driver recognizes the danger and enters the danger avoidance action even if the inter-vehicle distance is narrowed and a warning is given to notify the driver. This is because a warning must be issued in a state where the inter-vehicle distance is maintained, and a warning is frequently issued during normal driving. When controlling a vehicle such as an automatic brake instead of a warning, the possibility of falling into another dangerous state is not unavoidable depending on the degree of completion of the system. Then, the driver stops the operation of the warning device, and the device cannot fulfill the purpose of supporting safe driving.
[0017]
As described above, the conventional safe driving support apparatus has a problem that it is difficult to easily and inexpensively realize a system that operates reliably in a truly dangerous state and does not malfunction in a non-hazardous state. Was.
[0018]
The present invention solves the above-mentioned conventional problems, and accepts malfunctions due to technical limitations on the system, and based on human judgment and combination, it is possible to detect dangerous situations easily and inexpensively. An object of the present invention is to provide an excellent safe driving support device that notifies safe driving and supports safe driving.
[0019]
[Means for Solving the Problems]
In order to solve the above problems and achieve the object, the present invention ,other Calculate time to contact And this Time and time thresholds and Comparison results Warn in response to A safe driving support device that uses time calculated in the past About time New Threshold Determination means for determining, and command means for instructing the determination means to determine a new threshold value in response to a user operation The threshold is set by the output of the judgment threshold setting means provided with a volume or a switch that can set the stage so that the driver can arbitrarily set the risk judgment threshold. Has the effect of being able to.
[0020]
The present invention calculates the risk that indicates the possibility of contact with other objects And this Threshold for risk level and risk level Comparison results Warn in response to A safe driving support device, A determination means for determining a new threshold value for the risk level using the risk level calculated in the past; Yu Depending on the user's operation For the determination means Command means for commanding determination of a new threshold value.
[0021]
And with the above configuration , Police In the case of notification, the driver operates the command means for determining a new threshold value, thereby increasing the determination threshold value of the determination means, thereby making it difficult to issue a warning next time. In other words, when a warning is issued in a driving situation where you do not want a warning to be issued, the driver pushes the switch of the command means that raises the judgment threshold, thereby increasing the risk judgment threshold. Avoid warnings unless the risk is higher.
[0023]
In certain driving situations Police When a driver wants to issue a warning but a warning is not issued, the driver operates the command means to make it easier to issue a warning next time.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Book Invention is a decision Used for Threshold of By providing the setting means, for example, in the case of a device that issues a warning when the inter-vehicle distance with the preceding vehicle is shortened, the driver himself / herself comprehensively determines the driver's condition, cargo loading status, etc. The driver himself / herself can set the inter-vehicle distance for issuing a warning to 3 m, for example.
[0030]
The present invention Is the threshold value for pushbutton switches, etc. of If there is a warning due to the provision of command means, the driver Finger By operating the command means, the judgment threshold value is raised, and a function for making it difficult to issue a warning next time is provided. When the warning is issued, the driver of When the command means is operated, the judgment threshold inside the device is increased, so that the judgment threshold such as the warning start inter-vehicle distance is not set directly by the driver, but based on the actual driving situation Therefore, it is configured to be able to set a risk determination threshold value more suited to the driver's sense.
[0032]
Also , Push button switch etc. Finger By providing the command means, the driver would like to issue a warning under a certain driving situation but the warning was not issued. Finger The function of making it easy to issue a warning after the next time by operating the command means. And the driver Finger When the determination means is erroneously operated and the determination threshold is abnormally increased, the determination threshold is decreased without resetting the apparatus.
[0037]
(Embodiment 1)
FIG. 1 is a schematic block diagram according to Embodiment 1 of the present invention. 1, blocks having the same functions as those in FIG. 9 of the conventional example are denoted by the same reference numerals, and description thereof is omitted. Where 6 ' Is a determination threshold value setting means, which is composed of a push button, a volume, a touch panel, a remote control and the like, and allows the driver to arbitrarily set the time (in seconds) until the vehicle collides with the vehicle ahead.
[0038]
Next, the operation of FIG. 1 will be explained. Like the conventional example of FIG. 9, the sensor 1 detects the distance / relative speed with the preceding vehicle, calculates the time until the collision with the risk calculation device 2, This is compared with the risk determination device 3 based on the risk determination threshold 4, and if it is determined as dangerous, the warning generator 5 issues a warning. However, the risk determination threshold value 4 is not a fixed value, and the determination threshold value setting means 6 ' Set by For example, if the time until a collision with the vehicle ahead is set to 2 seconds or 3 seconds and can be set to 0 seconds, the system operation is effectively stopped. The range may be limited. This determination threshold value setting means 6 ' The driver can control the level of warning occurrence, for example, when driving for a long distance, when feeling slightly tired, or when a heavy load is placed on the loading platform and the deceleration capacity is lower than usual Can be warned early. That is, the warning generation level according to the state of the driver and the vehicle can be achieved.
[0039]
(Embodiment 2)
FIG. 2 is a schematic block diagram of a safe driving support apparatus according to Embodiment 2 of the present invention. Blocks having the same functions as those in FIG. 1 are denoted by the same reference numerals, and their operation sequences are substantially the same as those in FIG. The difference from Embodiment 1 in FIG. Calculation There are two types (A and B in the figure) of devices 2 and thereafter. The risk determination device 3A and the risk determination device 3B have the same configuration, and the risk determination threshold 4A and the risk determination threshold 4B have different values. Specifically, the risk determination threshold 4B is determined to be dangerous at a lower level. The warning generating device 5A is the same as the conventional warning generating device 5, but the warning generating device 5B is slightly different from the conventional one. That is, a sound closer to the notification sound is emitted rather than the warning sound.
[0040]
Hereinafter, in the description of FIG. 2, the warning output by the warning generation device 5B is expressed as a notification sound in order to clearly distinguish the warning generation devices 5A and 5B. As described in the section of the problem to be solved by the present invention, the risk level calculated by the safe driving support device does not necessarily match the true risk level in the actual driving situation. For example, even if the time until the collision is the same 3 seconds, the true risk differs greatly when the driver fully understands the situation and when the driver is driving aside. It is. If a risk determination threshold value is set so that the risk avoidance action can be taken with a sufficient margin even during side-view driving, an alarm may occasionally sound during normal driving. This is misunderstood for the driver, and in the worst case, the device may not function or the device may be removed.
[0041]
Therefore, a risk level that is dangerous during side-view driving but not so dangerous during normal driving is set as the risk determination threshold value 4B. Then, even if the warning generation device 5B operates during normal driving and a notification sound is occasionally generated, it is a notification sound. You can know that there is. However, when it is determined that the calculated risk is very high and the true risk is high, the risk determination threshold 4A, which is a high-level determination threshold, is exceeded, so the warning generating device 5A By sounding an alarm at, the driver can be informed that the real danger is imminent.
[0042]
The notification sound is a sound that does not make a person nervous, and is generally a low-frequency sound, an intermittent sound with low sound energy, or a small sound. For example, there are sounds such as “trick” and “tick” that occur when intermittent pulses are given to the speaker, and sounds such as a stream of brook.
[0043]
In this way, it is not an alarm that tensions the driver when a risk level that is perceived as false alarm during normal driving is calculated depending on the driver's situation. By making a notification sound, the driver can accept the false alarm, give the driver an indication of the situation in which the system will operate, and give the driver dangerous information in case of side-view driving, And if it is determined that the vehicle is truly dangerous, it can issue a warning that the driver is nervous and promptly avoids danger, so there is no need for the driver to stop the function of the device, and safe driving The device can support.
[0044]
Further, in this example, the case of two types after the risk determination device has been described, but three or more types may be used or may be made stepless. In the case of stepless, for example, by changing the frequency and size of the notification sound according to the time until the collision, an advantage that the driver can be informed of the danger of danger in an analog manner is added. The
[0045]
(Embodiment 3)
FIG. 3 is a schematic block diagram of a safe driving support apparatus according to Embodiment 3 of the present invention. The configuration from the sensor 1 to the warning generator 5 is the same as that of the first embodiment shown in FIG. Here, 7 is an initial value setting means, and 8 is a determination threshold value increase command means, which is constituted by a push button switch, for example. 9 is a risk storage means.
[0046]
Next, the operation will be described. In the initial setting of the system, the risk determination threshold 4 is set by the initial value setting means 7. This threshold value is sufficiently safe in comparison with the driving conditions of various drivers and the deceleration performance of the vehicle. That is, the alarm sounds even if the calculated risk is small.
[0047]
Further, the risk level storage means 9 calculates, for example, the calculated risk level for the past 30 seconds and the maximum risk level between them, and determines the calculated maximum risk level as a determination threshold value. Input to means 6. On the other hand, the judgment threshold value increase command means 8 is a push button switch that can be easily operated by the driver during driving. When a warning occurs in a certain driving situation, the driver wants to issue a warning. If the driver wants to increase the risk determination threshold value, the driver operates the determination threshold value increase command means 8. The increase command signal enters the determination threshold value determination means 6.
[0048]
In this determination threshold value determination means 6, when a rising command signal is received from the determination threshold value increase command means 8, the maximum risk value for the past 30 seconds obtained from the risk storage means 9 is determined as a risk level determination. Set as threshold value 4. In this way, it is possible to raise the risk determination threshold 4 so that no warning is issued when the same level of risk is calculated next time.
[0049]
Here, as the operation of the determination threshold value determination means 6, the larger one of the current risk determination threshold value and the maximum risk value obtained from the risk storage means 9 is set as a new risk determination threshold value. A new risk determination threshold value is set to avoid setting errors due to abnormal operations. There are also methods that combine a function to limit the value so that it does not fall outside a predetermined range, or to prevent the degree of one-time increase in the risk determination threshold from exceeding a certain value.
[0050]
Further, when a new risk determination threshold value is set, a function of displaying the threshold value or notifying the driver by voice may be added. Moreover each Of course, a combination with the embodiment is also conceivable.
[0051]
The above In the first embodiment, the apparatus is configured so that the driver can set the risk determination threshold in advance. However, depending on the driver, it may be difficult to set the time until the collision, for example. This is because, for example, even if it is 3 seconds, it is difficult to understand just how many dangers it is. In the third embodiment, since the driver can set according to the actual driving situation, there is an advantage that a risk determination threshold value that matches the driver's feeling can be set.
[0052]
(Embodiment 4)
FIG. 4 is a schematic block diagram of a safe driving support apparatus according to Embodiment 4 of the present invention. The statistical processing means 10 is added to the block diagram of FIG. This is to prevent the risk determination threshold value 4 from abnormally increasing due to the operation of the determination threshold value increase command means 8. As a specific operation, a plurality of risk determination threshold values 4 output from the determination threshold value determination means 6 are stored, and the average is taken as the risk determination threshold value 4. Also, the standard deviation of the plurality of threshold values is calculated, and when there is a threshold value that is more than twice the standard deviation and far from the average, the threshold value is deleted and the plurality of remaining threshold values are deleted. It also has an abnormal value deletion function that calculates the average of threshold values and sets it as a risk determination threshold value 4.
[0053]
These operations are performed every time a predetermined number of threshold values are obtained, and the risk determination threshold value 4 is updated. When a certain predetermined number is obtained as in an exponential function filter, these operations are performed. Thereafter, the threshold value can be updated every time the threshold value is obtained. The operation of the exponential function filter is, for example, a new value obtained by adding a value obtained by multiplying the past risk determination threshold value by 0.9 and multiplying the threshold value that is the output of the determination threshold value determination means 6 by 0.1. This is a risk determination threshold value.
[0054]
In this way, when the driver does not know the internal operation of the apparatus and operates the determination threshold value increase command means 8 corresponding to the true danger level, the determination threshold value determination is performed in the third embodiment (FIG. 3). The output of the means 6 can be considered to have a considerable width, and as a result, the risk determination threshold value may increase considerably. Book In the fourth embodiment, the threshold value rises fairly slowly, so that an appropriate threshold value can be set.
[0055]
(Embodiment 5)
FIG. 5 is a schematic block diagram of a safe driving support apparatus according to Embodiment 5 of the present invention. The determination threshold value increase command means 8 in the third embodiment shown in FIG. Contrary to the operation of FIG. 3 of the third embodiment, there is a method in which the initial value setting means 7 sets a considerably high value, that is, a value that does not issue a warning unless the danger level is considerably high, and gradually decreases it. You can get it, but it's not very good from a safety perspective. The operation here is an operation used in combination with the function of FIG. 3 of the third embodiment. That is, when the risk determination threshold value is unintentionally increased by the operation of FIG. 3, the safe driving support device is reset or the function described in FIG. 1 of the first embodiment is provided. If this is the case, the driver has to manually reset the risk determination threshold value. However, if the function of the fifth embodiment is provided, the risk determination threshold value is lowered in accordance with the driver's feeling. Can do.
[0056]
Specifically, the driver operates the determination threshold lowering command means 11 when the driver wants to issue a warning in a certain driving situation, but the warning is not issued. Then, for example, the determination threshold value determination means 6 outputs the maximum value of the risk level for the past 30 seconds as the risk level determination threshold value 4 output from the risk level storage means 9. Although the operation is similar to the operation of FIG. 3 of the third embodiment, the difference is that the threshold value is lowered, and the statistical average as shown in FIG. 4 of the fourth embodiment. Do not do something like that.
[0057]
In this way, even if the risk determination threshold value has increased too much, it is possible to easily reset the risk determination threshold value in accordance with the driver's feeling.
[0058]
(Embodiment 6)
FIG. 6 is a schematic block diagram of a safe driving support apparatus according to Embodiment 6 of the present invention. The warning type selection means 12 is added to FIG. 9 of the conventional example. Thus, the driver can set the type of warning. This function is particularly effective when the notification sound described with reference to FIG. The notification sound is such a sound that the driver who has heard it is not nervous as described above. However, since there are various drivers, it is difficult to create a notification sound that satisfies all drivers. Therefore, several notification sound candidates are prepared and the driver is made to select them. For example, when it is difficult for a driver to hear low frequency sound, the problem can be solved by setting high frequency sound.
[0059]
It is also possible to select a warning sound such as “brake!”. Because it takes time for the driver to hear the warning sound and determine what the warning is, and because some drivers recognize the danger and panic and do nothing, It is thought that giving voice instructions directly helps to avoid danger.
[0060]
In this way, the effect of the second embodiment is further enhanced, and the risk avoidance behavior is easily caused, thereby providing an effect of supporting safer driving.
[0061]
(Embodiment 7)
FIG. 7 is a schematic block diagram of a safe driving support apparatus according to Embodiment 7 of the present invention. The stop lamp blinking means 13 is added to FIG. 9 of the conventional example. When the warning generator 5 is actually operated to give a warning, it can be presumed that the deceleration operation will be entered or entered regardless of the true degree of danger. This is the same even when the type of warning is a notification sound. In other words, in the case of side-view driving etc., it is considered that the driver judges the danger based on the notification sound and enters the deceleration operation, and in normal driving, the accelerator is returned to enter the deceleration operation lightly and gently. It is. In other words, it can be said that there is a very high possibility of deceleration from now on.
[0062]
On the other hand, when you are driving aside, it takes time from when the warning is issued until the actual deceleration operation starts, and as a result, the degree of subsequent deceleration increases and sudden braking occurs. A collision of the following car is also conceivable.
[0063]
Therefore, as shown in FIG. 7, the warning generation device 5 is instructed to generate a warning, and the stop lamp blinking means 13 is also instructed. Then, when a warning that is highly likely to decelerate is generated, the subsequent vehicle is informed that the possibility of starting deceleration is very high, so that a rear-end collision of the subsequent vehicle can be made difficult to occur. The specific operation of the stop lamp blinking means 13 is an operation of blinking for about 0.5 seconds at a frequency of about 5 Hz, for example, using a command as a trigger.
[0064]
By the way, the stop lamp system is a very important system for a vehicle, and when a system for operating the stop lamp is added, the OR condition is often used basically. This concept is also used in this embodiment. That is, it does not flash when the driver has already stepped on the brake, and flashes when the driver has not stepped on the brake. Even in this case, the object of the present embodiment can be achieved.
[0065]
(Embodiment 8)
FIG. 8 is a schematic block diagram of a safe driving support apparatus according to Embodiment 8 of the present invention. The infrastructure information communication means 14 (specifically, information receiving means) is added to FIG. 9 of the conventional example, and the risk determination threshold value can be changed according to the information.
[0066]
There is a high probability that rear-end collisions will occur on curves with poor visibility, at the tail end of highway traffic jams, and in areas where temperatures are likely to be frozen due to low temperatures. Although it is known that the accident occurrence rate can be reduced by giving such location information from outside the vehicle and changing the operating conditions of the in-vehicle device, this embodiment specifically sets the risk determination threshold value. By lowering it, the accident is suppressed.
[0067]
Information providing organizations such as road managers provide such information through information providing media for vehicles such as radio wave beacons, optical beacons, FM multiplex broadcasting, wireless telephones, leaky coaxial cables, and the like. The infrastructure information communication means 14 is a means for receiving such information. When an accident occurrence rate is approached, the infrastructure information communication means 14 generates a signal for lowering the risk determination threshold 4 and the risk determination threshold decreases. When the vehicle passes through the place, the signal from the infrastructure information communication means 14 disappears, so the risk determination threshold value returns to the original value.
[0068]
There may be a mixture of vehicles that have functions similar to this device instead of this safe driving support device, and conventional vehicles that are not equipped with such a device at all. Sex is actually high. However, if there are some vehicles in the vehicle group that are equipped with this safe driving support device or a device having the same function as this device, these vehicles will decelerate or take an inter-vehicle distance. The accident rate can be lowered for the entire vehicle group. Here, the device having the same function as the safe driving support device is a device that informs the driver by voice or display that the end of the traffic jam is approaching.
[0069]
Information from the infrastructure need not be unique to this safe driving support device. This is because not all vehicles are equipped with this device, and some vehicles are equipped with a device having the same function as described above. Therefore, the information from the infrastructure is not information for adding the risk determination threshold value XX [seconds] but, for example, position information at the end of the traffic jam, designated maximum traveling speed, designated inter-vehicle distance information, and the like. The infrastructure information communication means 14 calculates and outputs how much the risk determination threshold value is changed from the information. The calculation formula is based on a simulation of vehicle behavior to determine the relationship between how the inter-vehicle distance and travel speed change when the risk threshold is changed. That's fine.
[0070]
As described above, in a place / area where the accident occurrence rate is high, the accident occurrence rate can be reduced by the information from the infrastructure.
[0071]
Further, as common to all the embodiments, when the power source of the device is interlocked with the ignition switch of the vehicle, the power source of the device is turned off when the engine is stopped. Therefore, if a backup memory is added to the apparatus and the determined risk judgment threshold value is written in the backup memory, the past risk judgment threshold value can be used when the engine is started next time. Furthermore, as an embodiment, any In Combination embodiments are also conceivable.
[0072]
【The invention's effect】
As described above, the safe driving support device of the present invention has the following effects for each invention.
[0073]
Book In the invention, an appropriate alarm generation level must be set according to the state of the driver and the vehicle, but in the present invention, it can be arbitrarily set by the judgment of the driver. Compared to a system that automatically determines the danger determination threshold in conjunction with a sensor that senses the state of a complicated and noble driver and a sensor that measures the load capacity, it is not automatic but has the same function. Can be realized by adding a switch or a volume, so that an inexpensive apparatus configuration can be obtained.
[0075]
Book The invention sets the threshold for judging the risk according to the actual driving situation. Finger Since it can be set by command means, there is an advantage that a risk determination threshold value suitable for the driver's feeling can be set. In addition, since a simple push button or the like is used as the device, it can be realized with an inexpensive and simple operation.
[0076]
Also Even when the risk determination threshold value has increased too much, it is possible to easily reset the risk determination threshold value in accordance with the driver's feeling.
[0077]
Also The driver who wants to issue a warning under certain driving conditions Finger Operate the command means to make it easier to generate the next and subsequent warnings.
[0078]
further , The driver does not know the internal operation of the device, the risk increases or decreases according to the true risk Do When the command means is operated, it is conceivable that the output of the determination threshold value determination means has a considerable range, and as a result, the risk determination threshold value may increase or decrease considerably. Then, since the rise or fall of the threshold value becomes fairly gradual, an appropriate threshold value can be set.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram of a safe driving support device according to a first embodiment of the present invention.
FIG. 2 is a schematic block diagram of a safe driving support apparatus in Embodiment 2 of the present invention.
FIG. 3 is a schematic block diagram of a safe driving support device according to a third embodiment of the present invention.
FIG. 4 is a schematic block diagram of a safe driving support apparatus in Embodiment 4 of the present invention.
FIG. 5 is a schematic block diagram of a safe driving support device in a fifth embodiment of the present invention.
FIG. 6 is a schematic block diagram of a safe driving support device in a sixth embodiment of the present invention.
FIG. 7 is a schematic block diagram of a safe driving support device in a seventh embodiment of the present invention.
FIG. 8 is a schematic block diagram of a safe driving support apparatus in an eighth embodiment of the present invention.
FIG. 9 is a schematic block diagram of a conventional safe driving support device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sensor, 2 ... Risk level calculation apparatus 3, 3A, 3B ... Risk level determination apparatus 4, 4A, 4B ... Risk level determination threshold value 5, 5, A, 5B ... Warning generation apparatus, 6 ' ... judgment threshold setting means, 6: Determination threshold value determining means, 7 ... Initial value setting means, 8 ... Determination threshold value increase command means, 9 ... Risk level storage means, 10 ... Statistical processing means, 11 ... Determination threshold value decrease command means, 12 ... Warning type selection means, 13 ... Stop Lamp blinking means, 14 ... Infrastructure information communication means

Claims (2)

Calculating a time until it contacts the other things, a safe driving support device for issuing a warning according to a result of comparison between the threshold value for this time and time,
A determination unit that determines a new threshold value for time using a time calculated in the past, and a command unit that commands the determination unit to determine a new threshold value according to a user operation. A safe driving support device characterized by the above. Calculating a risk that indicates the possibility of contact with other things, a safe driving support device for issuing a warning according to a result of comparison between the threshold for the risk and risk,
Determining means for determining a new threshold for risk using the risk degree calculated in the past, and command means for commanding the determination of new thresholds for said determining means according to the operation of the User chromatography The A safe driving support device comprising:

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