JP2019012489A - Warning device and warning system - Google Patents

Abstract

To provide a warning device and a warning system capable of suppressing warnings that do not meet driver's intention.SOLUTION: A warning device 1 is roughly configured to comprise a warning unit 10 that, when a vehicle is accelerated or decelerated due to a gradient Sof a road being traveled, determines that whether or not a vehicle speed Sis a speed intended by a driver under a condition that a change amount of an operation amount Sof an accelerator pedal 20 is less than or equal to an operation amount threshold value 102 and a variation amount of biological information Sis equal to or less than a biometric information threshold value 103, and when the condition is satisfied, determines that the vehicle speed Sis not a speed intended by a driver and generates a warning about the vehicle speed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a warning device and a warning system.

  As conventional technology, an image pickup means for picking up a roadside identification symbol provided so as to indicate the position of the sag portion on the road surface side of the road, and the roadside identification symbol picked up by the image pickup means is located behind the vehicle. In the case of the vehicle warning device, there is known a vehicle warning device including warning means for warning the possibility of a decrease in vehicle speed (see, for example, Patent Document 1).

  Since this vehicle warning device takes care that there is a risk of a decrease in the vehicle speed to a driver who does not recognize the sag portion based on the roadside identification symbol, the driver drives while taking care not to decrease the vehicle speed. As a result, it is possible to prevent congestion of the following vehicle.

JP 2008-257635 A

  However, the conventional vehicular warning device may give a warning even though the driver recognizes the decrease in the vehicle speed.

  Accordingly, an object of the present invention is to provide a warning device and a warning system that can suppress warnings that do not match the driver's intention.

  According to one aspect of the present invention, when the vehicle speed is accelerated or decelerated due to the slope of the running road, whether or not the vehicle speed is the speed intended by the driver is determined based on whether the change amount of the operation amount of the accelerator pedal is the first. Is determined based on the condition that the change amount of the biological information is equal to or less than the second threshold value, and is determined to be not intended when the condition is satisfied, and a warning regarding the vehicle speed is issued. Provided is a warning device including a warning unit that emits.

  According to the present invention, warnings that do not match the driver's intention can be suppressed.

FIG. 1A is a block diagram illustrating an example of a warning device according to the first embodiment, and FIG. 1B is a schematic diagram illustrating an example of the interior of a vehicle in which the warning device is arranged. FIG. 2A is a block diagram showing an example of a vehicle communication system including the warning device according to the first embodiment, and FIG. 2B is a schematic diagram for explaining an example of a sag unit and the like. FIG. FIG. 3A and FIG. 3B are graphs showing an example of biometric information acquired by the warning device according to the first embodiment. FIG. 4 is a flowchart illustrating an example of the operation of the warning device according to the first embodiment. FIG. 5 is a flowchart illustrating an example of the operation of the warning device according to the second embodiment.

(Summary of embodiment)
In the warning device according to the embodiment, when the vehicle is accelerated or decelerated due to the slope of the running road, the amount of change in the operation amount of the accelerator pedal indicates whether or not the vehicle speed is the speed intended by the driver. It is determined based on the condition that it is equal to or less than the first threshold value and the change amount of the biological information is equal to or less than the second threshold value, and it is determined that it is not intended when the condition is satisfied. It is schematically configured with a warning section that issues a warning.

  This warning device determines the presence or absence of the driver's intention based on the amount of change in the amount of operation of the accelerator pedal and the amount of change in biological information when the vehicle accelerates or decelerates due to the road gradient. Therefore, compared with a case where this configuration is not adopted, warnings that do not match the driver's intention can be suppressed.

[First embodiment]
(Outline of warning device 1)
FIG. 1A is a block diagram illustrating an example of a warning device according to the first embodiment, and FIG. 1B is a schematic diagram illustrating an example of the interior of a vehicle in which the warning device is arranged. FIG. 2A is a block diagram showing an example of a vehicle communication system including the warning device according to the first embodiment, and FIG. 2B is a schematic diagram for explaining an example of a sag unit and the like. FIG. Note that, in each drawing according to the embodiment described below, the ratio between figures may be different from the actual ratio. Further, in FIGS. 1A and 2A, the flow of main signals and information is indicated by arrows.

  For example, as shown in FIGS. 1A to 2A, the warning device 1 is mounted on the vehicle 2 and warns that the vehicle speed is accelerated or decelerated due to the gradient during traveling. It is configured.

Specifically, warning device 1, when it is accelerated or decelerated due to the gradient S ₂ of the road during traveling, whether the vehicle speed S ₃ is intended speed of the driver's accelerator pedal 20 the amount of change in the manipulated variable S ₄ is equal to or less than the first threshold value (operation amount threshold 102), and biometric information S change amount of the ₅ second threshold (biometric information threshold 103) below It is roughly configured to include a warning unit 10 that determines whether the vehicle speed is satisfied and issues a warning regarding the vehicle speed by determining that the condition is not intended when the condition is satisfied.

The warning unit 10 is configured to perform a warning when the speed variation of the vehicle speed S ₃ in addition to the above conditions is the velocity change threshold 104 than the predetermined.

  For example, the warning unit 10 of the present embodiment performs determination when the road on which the vehicle is traveling is an expressway. Note that the warning unit 10 is not limited to this, and may be configured to perform the determination when traveling on a road that continues up and down a long distance such as a mountain road.

As a modification, the warning unit 10 may determine a road on which a determination is made in advance. Such a road is, for example, an uphill or downhill with a large gradient on a highway, or a road having a sag portion between an uphill and a downhill. Warning unit 10 acquires, for example, road information S ₁ is information of the road from the navigation device or the like to be described later.

The warning device 1 is electromagnetically connected to a vehicle LAN (Local Area Network) 28 as shown in FIG. Then, for example, as shown in FIG. 2A, the warning device 1 acquires road information S ₁ , gradient S ₂ , vehicle speed S ₃ , operation amount S _4, and biological information S ₅ via the vehicle LAN 28. . The vehicle LAN 28 is, for example, a vehicle network such as a CAN (Controller Area Network) or a LIN (Local Interconnect Network) that can exchange signals and information with each other by wire and wireless.

The vehicle communication system 3 shown in FIG. 2 (a), for example, provides road information S ₁ , gradient S ₂ , vehicle speed S ₃ , manipulated variable S _4, biological information S _5, etc. between the warning device 1 and other devices. It is for exchanging with. Therefore, for example, the vehicle communication system 3 includes the warning device 1, the gradient acquisition device 22, the vehicle speed measurement device 23, the operation amount detection device 24, the biological information measurement device 25, the output device 26, and the display device 27. And a vehicle LAN 28 and a vehicle control unit 30.

(Configuration of warning unit 10)
FIG. 3A and FIG. 3B are graphs showing an example of biometric information acquired by the warning device according to the first embodiment. In FIG. 3A, the vertical axis represents a heart rate as an example of biological information, and the horizontal axis represents time. In FIG. 3B, the vertical axis represents the amount of eye movement, which is an example of biological information, and the horizontal axis represents time. In FIG. 3A and FIG. 3B, the dotted line is an example when the change in the driver's concentration is small, and the solid line is an example when the driver's concentration is increased.

The warning unit 10 includes, for example, a CPU (Central Processing Unit) that performs operations and processes on acquired data according to a stored program, a RAM (Random Access Memory) that is a semiconductor memory, a ROM (Read Only Memory), and the like. Microcomputer. In this ROM, for example, a program for operating the warning unit 10, a gradient threshold value 101, an operation amount threshold value 102, a biological information threshold value 103, and a speed change threshold value 104 are stored. Stored. For example, the RAM is used as a storage area for temporarily storing calculation results, acquired road information S ₁ to biometric information S _{5, and the} like in time series.

For example, when the vehicle 2 is traveling on a downhill 4 as shown in FIG. 2B at a vehicle speed V ₁ and an acceleration α ₁ , the vehicle 2 has an acceleration β ₁ (= α ₁₎ in the acceleration direction. Sin θ ₁ : θ ₁ is an angle of the downhill 4). That is, the vehicle 2 is accelerated at an acceleration (α ₁ + β ₁ ) greater than the acceleration α ₁ when air resistance, rolling resistance, and the like are not considered. Accordingly, when the driver keeps the operation amount of the accelerator pedal 20 constant (α ₁ = 0) in order to keep the speed constant, the vehicle 2 is accelerated by β ₁ and the vehicle speed V ₁ increases unintentionally.

For example, when the vehicle 2 is traveling on an uphill 6 as shown in FIG. 2B at a vehicle speed V ₂ and an acceleration α ₂ , the vehicle 2 is decelerated (opposite to the traveling direction). Is added with acceleration β ₂ (= α ₂ Sinθ ₂ : θ ₂ is the angle of the uphill 6). That is, the vehicle 2 is decelerated at an acceleration (α ₂ −β ₂ ) smaller than the acceleration α ₂ when air resistance, rolling resistance, and the like are not considered. Accordingly, when the driver keeps the operation amount of the accelerator pedal 20 constant so as to keep the speed constant (α ₂ = 0), the vehicle 2 is decelerated by β ₂ and the vehicle speed V ₂ is unintentionally lowered.

  In particular, for example, as shown in FIG. 2B, when the sag portion 5 exists between the downhill 4 and the uphill 6, the driver travels the uphill 6 without noticing the change in the slope. It is known that this is one of the causes of traffic jams. The sag portion 5 is a section where the road gradient gradually changes from the downward direction to the upward direction.

Therefore warning unit 10, the slope S ₂ may be the gradient threshold value 101 or more, the vehicle speed S ₃ has a driver's intention based on such further MV change amount of S ₄ and the variation of the biological information S ₅ It is determined whether it is a thing.

If the amount of change in the manipulated variable S ₄ is large, the driver, since the adjustment of the vehicle speed S _3, is considered to have a high degree of concentration. If also small amounts of change in the manipulated variable S _4, the driver, since hardly adjusted vehicle speed S _3, is considered to be low degree of concentration. Therefore warning unit 10, based on the stored operation amount S ₄ to calculate the amount of change, if the change amount is the operation amount threshold 102 or less, it is judged to be low degree of concentration, the operation amount threshold When larger than 102, it is determined that the degree of concentration is high.

Also if the biometric information S ₅ were heart rate, for example, as shown by the solid line in FIG. 3 (a), the degree of concentration of the driver is high, since the condition in which nervous by such attentive around, The heart rate is thought to increase. On the other hand, when the concentration of driving is not high, it is not in a state of tension, and for example, it is considered that the change in heart rate is small as shown by the dotted line in FIG.

Also if the biometric information S ₅ was vision shift amount, for example, as shown by the solid line in FIG. 3 (b), the degree of concentration of the driver is high, the greater the to eye movement, such as pay attention to ambient conditions Therefore, it is considered that the amount of eye movement increases. On the other hand, when the degree of concentration of driving is not high, the range of the line-of-sight movement is likely to be narrowed. For example, as indicated by a dotted line in FIG.

Therefore warning unit 10, when the change amount of the acquired biometric information S ₅ is equal to or less than the biometric information threshold 103, it is determined that low degree of concentration, greater than the biological information threshold 103, the high degree of concentration It is configured to determine.

Here the warning unit 10, to the vehicle 2 may be the difference between the amount of change in the reference value such as an average value of the biological information S ₅ when running on a road gradient threshold 101 is smaller than the gradient, previously A difference from a predetermined reference value may be used as the amount of change, and is not limited to this.

Note the warning unit 10 as a modified example has a biometric information threshold 103 related to biometric information S _5, when the biometric information S ₅ obtained is below biometric information threshold 103, so as to determine that there is a low degree of concentration It may be configured.

Further warning unit 10, when a warning when the speed variation of the vehicle speed S ₃ is small, the warning may become cumbersome, there speed variation threshold 104 or more speed change that is determined in advance It is configured to warn you.

That warning unit 10, when the vehicle runs on an expressway, when the gradient S ₂ is the slope threshold 101 or more, the change amount of the operation amount S ₄ of the accelerator pedal 20, the speed variation of the vehicle speed S _3, and It is configured to warn that it is not the vehicle speed S ₃ intended by the driver based on the change amount of the biological information S _5.

Warning unit 10 other words, it is determined based on the intention of the driver to the operating amount change amount of S ₄ and the variation of the biological information S ₅ of the accelerator pedal 20, further type of traveling road, the gradient S _2, By considering the speed change amount in combination, a more appropriate warning is provided.

(Configuration of the gradient acquisition device 22)
For example, as illustrated in FIG. 2B, the gradient acquisition device 22 acquires the gradient (for example, Y ₁ / X or Y ₂ / X) of the road on which the vehicle 2 is traveling and warns as the gradient S _2. It is configured to output to the device 1. The gradient acquisition device 22 is configured by, for example, a navigation device or a measurement device that measures the inclination of the vehicle 2.

  In the case of a navigation device, for example, the gradient is calculated using information from map information, an inclination sensor, a gyro sensor, or the like. The navigation device may be configured to acquire a gradient using, for example, a GPS (Global Positioning System) function.

In the case of measuring devices, for example, configured to calculate the slope S ₂ based on measurements such as inclination sensor disposed in the vehicle 2.

In the present embodiment, it is assumed that the gradient acquisition device 22 is a navigation device. Therefore, the road information S ₁ is output from this navigation device, that is, the gradient acquisition device 22.

(Configuration of vehicle speed measuring device 23)
Vehicle velocity measuring device 23 is, for example, a device for measuring the vehicle speed S ₃ provided in the vehicle 2. Vehicle velocity measuring device 23, for example, is configured so as to output measured vehicle speed S ₃ of the vehicle 2 by the number of revolutions of the GPS and the vehicle 2 wheel.

(Configuration of operation amount detection device 24)
Operation amount detecting apparatus 24 is configured to detect an operation amount S ₄ of the accelerator pedal 20. The operation amount S ₄ is, for example, a stroke amount of the accelerator pedal 20. The operation amount detection device 24 is configured by, for example, a magnetic sensor that detects the approach and separation of the accelerator pedal 20.

Note operation amount detecting apparatus 24 as a modification is not limited to detecting an operation amount S ₄ of the accelerator pedal 20 may be a device that detects an accelerator opening as the operation amount S _4.

(Configuration of the biological information measuring device 25)
Biological information measurement device 25, the heart rate of the driver, the blood pressure, vision shift amount, the skin resistance, and is configured to measure at least one biological information S ₅ of the skin surface temperature and the amount of sweat. In this embodiment, as an example, using the heart rate of the driver as the biological information S _5.

  For example, as shown in FIG. 1B, the biological information measuring device 25 has a pair of electrodes disposed on the grip portion 210 of the steering wheel 21 that contacts the palm of the driver. The biological information measuring device 25 is configured to output the heart rate measured through the pair of electrodes.

  As a modification, the biological information measuring device 25 may measure a heart rate, a blood pressure, or the like using, for example, an optical sensor or a pressure sensor.

  For example, when measuring the amount of eye movement, the biological information measuring device 25 processes and measures an image captured by a camera arranged at a position where the driver's face can be imaged. In addition, for example, when measuring the skin resistance value or the amount of sweating, the biological information measuring device 25 measures a resistance value by arranging a pair of electrodes in contact with the driver, and measures based on the resistance value. For example, when measuring the skin surface temperature, the biological information measuring device 25 performs measurement based on an image of a thermo camera arranged at a position where the driver can be imaged.

(Configuration of output device 26)
For example, as illustrated in FIG. 1B, the output device 26 includes a plurality of speakers arranged on left and right doors, pillars, and the like. The output device 26 is adapted to output a warning sound by the input of the alarm signal S ₆ output from the warning device 1.

(Configuration of display device 27)
The display device 27 is, for example, a liquid crystal display disposed on the center console of the vehicle 2. The display device 27 may be configured as a sub display in a meter panel on which a speedometer or the like is arranged, for example.

Warning device 1 is, for example, may be a warning image by outputting a warning signal S ₆ to the display device 27.

(Configuration of vehicle control unit 30)
The vehicle control unit 30 is a microcomputer including a CPU, a RAM, a ROM, and the like, for example. For example, a program for operating the vehicle control unit 30 is stored in the ROM. For example, the RAM is used as a storage area for temporarily storing calculation results and the like. For example, the vehicle control unit 30 controls communication using the vehicle LAN 28 and comprehensively controls the vehicle 2.

  Hereinafter, an example of the operation of the warning device 1 according to the present embodiment will be described with reference to the flowchart of FIG.

(Operation)
For example, when the vehicle 2 starts traveling, the warning unit 10 of the warning device 1 periodically acquires road information S ₁ to biological information S ₅ (Step 1). Note the timing of acquiring the road information S _{1 ~} biometric information S ₅ is not limited thereto, may be obtained each time it is compared to a threshold.

Next warning unit 10 determines the road the vehicle is traveling based on the road information S ₁ is whether a motorway. Warning unit 10, if the road running were highway (Step2: Yes), then compares the gradient _{S 2} and slope threshold 101.

Warning unit 10, when the gradient _{S 2} is the slope threshold 101 or more (Step3: Yes), subsequently on the basis of the operation amount _{S 4} to calculate the change amount of the operation amount _{S 4,} the variation amount and the operation amount The threshold value 102 is compared. Warning unit 10, when the amount of change in the manipulated variable _{S 4} is an operation amount threshold value 102 or less (Step4: Yes), followed by comparing the amount of change and the velocity change threshold value 104 of the vehicle speed _{S 3.}

Warning unit 10, when the speed variation of the vehicle speed _{S 3} was the velocity change threshold value 104 or more (Step5: Yes), followed by comparing the biometric information _{S 5} and the biological information threshold 103.

Warning unit 10, when the variation of the biological information _{S 5} is equal to or smaller than the biometric information threshold 103 (Step6: Yes), low concentration level of the driver, the acceleration or deceleration the vehicle speed _{S 3} unintentionally and has a determined and generates a warning signal _{S 6} for alerting, warning is output to the output device 26 or display device 27 via the vehicle LAN 28 (Step7), and terminates the warning operation.

  Here, in step 2, the warning unit 10 advances the process to step 1 when the traveling road is not a highway (Step 2: No).

In step 3, the warning unit 10 advances the processing to step 1 when the gradient S ₂ is smaller than the gradient threshold 101 (Step 3: No).

In step 4, the warning unit 10 advances the process to step 1 when the change amount of the operation amount S ₄ is larger than the operation amount threshold value 102 (Step 4: No).

Warning unit 10 in step 5, when the amount of change in the vehicle speed _{S 3} the speed change threshold 104 is smaller than (Step5: No), the process proceeds to step 1.

Warning unit 10 in Step 6, if the variation of the biological information _{S 5} is larger than the biometric information threshold 103 (Step6: No), high concentration level of the driver, the vehicle speed _{S 3} along the intended acceleration or It is determined that the vehicle is decelerating, and the process proceeds to step 1 without issuing an unintentional warning.

  Note that the order of steps 2 to 6 may be changed.

(Effects of the first embodiment)
The warning device 1 according to the present embodiment can suppress warnings that do not match the driver's intention. Specifically, warning device 1, or the vehicle 2 due to the slope S ₂ is accelerated beyond the speed change threshold 104 of the road, when there is a change in velocity or to decelerate, the accelerator pedal 20 since determining the presence or absence of the driver's intention based on a change amount of the operation amount S ₄ and the variation of the biological information S _5, as compared with the case not employing the configuration, suppressing a warning not fit to the driver's intention Can do.

  Since the warning device 1 determines whether or not to issue a warning on an expressway whose vehicle speed is higher than that of a general road, the warning device 1 suppresses an unintended speed increase on a downhill compared to a case where this configuration is not adopted. On an uphill, unintended speed reduction can be suppressed. When the warning device 1 is traveling on a road having the sag portion 5 as shown in FIG. 2B, the warning device 1 can warn of a decrease in speed particularly on the uphill 6; Compared with, it is possible to suppress the occurrence of traffic jams due to a decrease in the speed of the host vehicle.

Warning device 1, since as one of conditions a speed variation of the vehicle speed S _3, as compared with the case not employing the configuration, it is possible to suppress the warning when the speed change is small, the more the driver Unintentional warnings can be suppressed.

[Second Embodiment]
The second embodiment is different from the other embodiments in that a warning is issued when a condition is continuously satisfied for a predetermined time.

  FIG. 5 is a flowchart illustrating an example of the operation of the warning device according to the second embodiment. In the embodiments described below, parts having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

The warning unit 10 is configured to determine that the vehicle speed is not intended when the condition is continuously satisfied for a predetermined time. The warning unit 10 has a function of measuring time, and stores this predetermined time as a threshold value. Note the warning unit 10 as a modified example, if the condition of at least steps 4 and step 6 for determining the driver's intention is satisfied continuously for a time predetermined, that the vehicle speed S ₃ is intended It may be configured to determine that it is not.

  Hereinafter, an example of the operation of the warning device 1 of the present embodiment will be described with reference to the flowchart of FIG.

(Operation)
Steps 11 to 16 are the same as steps 1 to 6 in the first embodiment. Next, the warning part 10 advances a process to step 1, when the continuation time which satisfies step 12-step 16 is shorter than the predetermined time (Step17: No).

Here, in step 17, when the continuation time that satisfies step 12 to step 16 is equal to or longer than a predetermined time (Step 17: Yes), the warning unit 10 has a low driver concentration and the vehicle is not intended. It determines the speed S ₃ is accelerating or decelerating, and generates a warning signal S ₆ to alert outputs to the output device 26 or display device 27 to alert (Step 18), and terminates the warning operation.

(Effect of the second embodiment)
The warning device 1 according to the present embodiment does not issue a warning until the duration time that satisfies the warning condition is equal to or longer than a predetermined time. It can be carried out.

[Third Embodiment]
The warning system in the third embodiment is
A gradient acquisition unit 22 that acquires the slope S ₂ of the road during traveling,
A vehicle speed measuring device 23 for measuring the vehicle speed S _3,
An operation amount detecting apparatus 24 for detecting an operation amount S ₄ of the accelerator pedal 20,
A biological information measurement device 25 for measuring biological information S _5,
Due to the slope S ₂ of the road in the traveling acceleration or deceleration by the vehicle speed S ₃ is the driver's intended a speed whether the operation amount S ₄ of variation is first Works accelerator pedal 20 or less threshold (operation amount threshold 102), and the variation of the biological information S ₅ is determined by conditions that is less than the second threshold value (biological information threshold 103), conditions are met a warning device 1 having a warning unit 10 for issuing a warning about the vehicle speed S ₃ and determined not intended when it is,
Is generally configured.

  This warning system can suppress warnings that do not match the driver's intention.

  The warning device 1 and the warning system according to the above-described embodiment and modification are, for example, a program executed by a computer, an ASIC (Application Specific Integrated Circuit), and an FPGA (Field Programmable Gate Array) depending on applications. ) Or the like.

  As mentioned above, although some embodiment and modification of this invention were demonstrated, these embodiment and modification are only examples, and do not limit the invention based on a claim. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. In addition, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Further, these embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Warning apparatus, 2 ... Vehicle, 3 ... Vehicle communication system, 4 ... Downhill, 5 ... Sag part, 6 ... Uphill, 10 ... Warning part, 20 ... Accelerator pedal, 21 ... Steering, 22 ... Gradient acquisition apparatus, DESCRIPTION OF SYMBOLS 23 ... Vehicle speed measuring device, 24 ... Operation amount detection device, 25 ... Biological information measuring device, 26 ... Output device, 27 ... Display device, 28 ... Vehicle LAN, 30 ... Vehicle control part, 101 ... Gradient threshold value, 102 ... operation amount threshold value, 103 ... biological information threshold value, 104 ... speed change threshold value, 210 ... gripping part

Claims (6)

  When the vehicle is accelerated or decelerated due to the slope of the running road, whether or not the vehicle speed is the speed intended by the driver, the change amount of the operation amount of the accelerator pedal is equal to or less than the first threshold value. And a warning unit that makes a determination based on a condition that the amount of change in biometric information is equal to or less than a second threshold value, determines that the change is not intended when the condition is satisfied, and issues a warning regarding the vehicle speed. Warning device. The warning unit issues a warning when the speed change amount of the vehicle speed is equal to or higher than a predetermined speed change threshold value in addition to the condition.
The warning device according to claim 1. The warning unit further determines that the vehicle speed is not intended when the condition is continuously satisfied for a predetermined time.
The warning device according to claim 1 or 2. The biological information is at least one of the driver's heart rate, blood pressure, line-of-sight movement, skin resistance, skin surface temperature, and sweating.
The warning device according to any one of claims 1 to 3. The warning unit makes a determination when the road on which the vehicle is traveling is a highway,
The warning device according to any one of claims 1 to 4. A gradient acquisition device for acquiring the gradient of the road being traveled;
A vehicle speed measuring device for measuring the vehicle speed;
An operation amount detection device for detecting an operation amount of an accelerator pedal;
A biological information measuring device for measuring biological information;
When the vehicle speed is accelerated or decelerated due to the slope of the traveling road, whether or not the vehicle speed is the speed intended by the driver is determined by a change amount of the operation amount of the accelerator pedal as a first threshold. Is determined based on the condition that the amount of change in the biological information is equal to or less than a second threshold value, and is determined to be unintended when the condition is satisfied. A warning device having a warning part to emit;
With warning system.

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