JP2013155629A - Driving support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving support device which makes it possible to recognize that a vehicle is in such a dangerous state that the vehicle performs sudden acceleration exceeding acceleration corresponding to an accelerator opening.SOLUTION: A driving support device determines by a vehicle state determination means P3 that a vehicle is in a dangerous state when an area of vehicle state determination map information stored in a map information storage means D1 and specified by acceleration detected by an acceleration detection means P1 and an accelerator position detected by an accelerator opening detection means P2 is an area defined by a high acceleration range and a low accelerator opening range. A vehicle state display means P4 displays information corresponding to the vehicle state determined by the vehicle state determination means P3.

Description

  The present invention relates to a driving support device that supports driving of a vehicle.

  2. Description of the Related Art Conventionally, a device for evaluating a driver's driving skill using data read from an operation recording device mounted on a vehicle is known. For example, the evaluation apparatus described in Patent Document 1 utilizes the fact that when driving a vehicle, an economical driving with good fuel consumption can be realized by slowly depressing an accelerator pedal together with acceleration. The driving skill was evaluated based on the amount of depression of the accelerator pedal.

JP 2007-33396 A

  However, in the evaluation apparatus of Patent Document 1, whether or not the driving operation is economical is evaluated based on the depression amount of the accelerator pedal (that is, the opening degree of the accelerator). When the vehicle is traveling, the speed is not reduced and the amount of depression of the accelerator pedal is reduced. Similarly, when the vehicle is in a dangerous state where the vehicle has been accelerated, it is determined that the driving operation is good, and there is a problem that appropriate evaluation cannot be performed.

  The present invention aims to solve this problem. That is, an object of the present invention is to provide a driving support device capable of recognizing that the vehicle is in a dangerous state where the vehicle suddenly exceeds the acceleration corresponding to the accelerator opening.

  In order to achieve the above object, according to a first aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, in a driving support device for supporting driving of a vehicle, acceleration detecting means for detecting the acceleration of the vehicle P1, accelerator opening detecting means P2 for detecting the accelerator opening of the vehicle, the acceleration detected by the acceleration detecting means P1, and the accelerator opening detected by the accelerator opening detecting means P2. Vehicle state determination means P3 for determining the state of the vehicle by applying to predetermined vehicle state determination map information indicating the relationship between the acceleration of the vehicle and the accelerator opening of the vehicle and the state of the vehicle, and the vehicle state Vehicle state display means P4 for displaying information according to the state of the vehicle determined by the determination means P3, and the vehicle state determination means P3 is connected to the acceleration detection means P1. The region of the vehicle state determination map information specified by the detected acceleration and the accelerator opening detected by the accelerator opening detecting means P2 is a part of the range of values that the acceleration of the vehicle can take. It is determined that the vehicle is in a dangerous state when it is a region partitioned by a predetermined high acceleration range and a predetermined low accelerator opening range that is a part of a range of values that the accelerator opening of the vehicle can take. This is a driving support device that is configured to do this.

  The invention described in claim 2 is the invention described in claim 1, wherein the vehicle state determination means P3 further includes the acceleration detected by the acceleration detection means P1 and the accelerator opening detection means P2. The vehicle accelerator position is determined by the vehicle state determination map information area specified by the accelerator position detected in step S3, which is larger than the upper limits of the high acceleration range and the low accelerator position range. The vehicle is configured to determine that the vehicle is in a dangerous state and in a fuel-efficient state when the vehicle is in a region partitioned by a predetermined high accelerator opening range that is another part of the range of possible values. It is characterized by being.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the vehicle state determination unit P3 further detects the acceleration and the accelerator opening detected by the acceleration detection unit P1. Other than the range of values that can be taken by the acceleration of the vehicle, wherein the region of the vehicle state determination map information specified by the accelerator opening detected by the means P2 is smaller than the lower limit value of the high acceleration range. The vehicle is configured to determine that the vehicle is in a fuel-efficient state when the vehicle is in a region partitioned by a predetermined low acceleration range and a high accelerator opening range that are part of the vehicle. It is.

  The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the vehicle state determination means P3 further includes the acceleration detected by the acceleration detection means P1 and When the region of the vehicle state determination map information specified by the accelerator opening detected by the accelerator opening detection means P2 is a region partitioned by the low acceleration range and the low accelerator opening range, The vehicle is configured not to be in a dangerous state and not in a fuel-efficient state.

  According to the first aspect of the present invention, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is a region divided by a predetermined high acceleration range and a predetermined low accelerator opening range. Therefore, the vehicle is determined to be in a dangerous state, and information corresponding to the state is displayed. Therefore, by appropriately setting the vehicle state determination map information, the vehicle has a small accelerator opening. However, the driver is in a state of sudden acceleration at an acceleration that requires attention, i.e., that the vehicle is operating in a dangerous state that causes sudden acceleration exceeding the acceleration corresponding to the accelerator opening. Can be recognized. Accordingly, the above state is displayed in real time based on the acceleration and the accelerator opening acquired during the traveling of the vehicle to alert the driver during the traveling or the acceleration and the accelerator collected during the traveling of the vehicle. The opening degree is analyzed after traveling and the above state is displayed, and driving guidance can be provided to the driver after traveling to assist the driving of the vehicle.

  According to the invention described in claim 2, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is further divided into a predetermined high acceleration range and a predetermined high accelerator opening range. The vehicle is in a dangerous state and a fuel-efficient state, and information according to that state is displayed, so by appropriately setting the vehicle state determination map information, The driver can be made aware that the vehicle is rapidly accelerating at an acceleration that requires attention due to excessive opening of the accelerator, that is, the vehicle is in a dangerous and fuel-efficient state.

  According to the invention described in claim 3, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is further divided into a predetermined low acceleration range and a predetermined high accelerator opening range. If the vehicle is in the area, it is determined that the vehicle is in a state of poor fuel consumption, and information corresponding to the state is displayed. Therefore, by appropriately setting the vehicle state determination map information, the vehicle opens the accelerator. Driving in a state where the vehicle is not accelerating sufficiently even if the degree is high, that is, the vehicle is in a state of poor fuel economy that results in slow acceleration below the acceleration according to the accelerator opening. Can be recognized.

  According to the invention described in claim 4, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is further divided into a predetermined low acceleration range and a predetermined low accelerator opening range. When it is an area, it is determined that the vehicle is not in a dangerous state and is not in a fuel-efficient state, and information corresponding to the state is displayed. Therefore, by appropriately setting the vehicle state determination map information, However, it is possible to make the driver recognize that the vehicle is being driven at an efficient acceleration according to the opening of the accelerator, that is, the driving operation is in a safe and fuel-efficient state.

It is a figure which shows the basic composition of the driving assistance device of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the digital tachograph which is one Embodiment of the driving assistance device which concerns on this invention, Comprising: (a) is a figure which shows the state which closed the cover, (b) shows the state which opened the cover. FIG. It is a block diagram of the digital tachograph of FIG. It is a flowchart which shows an example of the process (vehicle state display process) which concerns on this invention which CPU of FIG. 3 performs. It is a figure which shows an example of the vehicle state determination map information memorize | stored in the non-volatile memory with which the digital tachograph of FIG. 2 is provided. It is a figure which shows the 1st modification of the vehicle state determination map information of FIG. It is a figure which shows the 2nd modification of the vehicle state determination map information of FIG. It is a figure which shows the 3rd modification of the vehicle state determination map information of FIG.

  Hereinafter, a digital tachograph as an operation recorder which is an embodiment of the driving support device of the present invention will be described with reference to FIGS.

  The digital tachograph 1 described below is mounted on a vehicle for carrying goods such as a truck and a trailer, and collects vehicle data such as speed, engine speed, and traveling position of the vehicle as operation information. It is recorded on the memory card 23. Further, the digital tachograph 1 is connected to an accelerator opening sensor 24, detects the opening of the accelerator of the vehicle at a predetermined timing, and also records the measurement result of the accelerator opening sensor 24 in the memory card 23 as an operation record. Record.

  Here, the accelerator opening is defined as 0% when the accelerator pedal provided on the vehicle is not depressed (engine idling state) and 100% when the accelerator pedal is fully depressed. It is the value indicated by the ratio of the amount of fuel ejection with the amount of depression. Further, for example, when the engine brake is effective, the fuel injection amount (that is, the accelerator opening) may be controlled to be smaller than the engine idling state depending on the traveling state of the vehicle. In such a case, the accelerator opening is shown using a negative value at the same rate as when the accelerator pedal is depressed.

  The digital tachograph 1 is connected to an information management device (not shown) configured by a personal computer or the like installed in a management company that manages the operation of the vehicle by wireless communication. The digital tachograph 1 and the information management device are connected to each other. An operation management system is configured.

  As shown in FIGS. 2A and 2B, the digital tachograph 1 has a main body 1a formed of a box-shaped housing. The main body 1a is formed of a synthetic resin or the like, and a front case 1b is provided on the front surface portion thereof. The digital tachograph 1 is attached to the vehicle such that the front case 1b is arranged toward the driver's seat side of the vehicle.

  The front case 1b includes a cover 1c, an insertion slot 1d, a display unit 27, and an operation unit 28.

  The front surface of the cover 1c is formed in a plate shape, is substantially equal to the height of the front case 1b, and is large enough to close the insertion slot 1d. The cover 1c is provided on the front surface side (the front side in FIG. 2) of the front case 1b, and is configured to be slidable in the width direction of the front case 1b (left and right direction in FIG. 2). That is, the cover 1c transitions between a closed state (FIG. 2 (a)) that covers the insertion slot 1d and an open state (FIG. 2 (b)) in which the memory card 23 can be inserted into and removed from the insertion slot 1d. It has become.

  The insertion slot 1d is formed in a slit shape in the width direction at a location near the left side of the front case 1b. A card-like memory card 23 to be mounted on the reader / writer unit of the external recording media interface 13 (see FIG. 3) accommodated in the main body 1a is inserted into / removed from the insertion slot 1d.

  The display unit 27 is composed of an LCD display, and displays operation status, various alarms, and the like. The display unit 27 is configured to display a message indicating the state of the vehicle.

  The operation unit 28 includes a start / end switch 28a, a display changeover switch 28b, a run / rest switch 28c, a high-speed switch 28d, and a dedicated road switch 28e.

  The start / end switch 28a generates a signal for starting and ending the recording of operation information according to the pressing operation. The display changeover switch 28b generates a signal for switching functions, display screens, and the like in accordance with the pressing operation. The run / rest switch 28c generates a signal for recording the start and end of a temporary break during operation as operation information in response to a pressing operation when the operation information recording is started. The high-speed switch 28d is operated when the traveling road is switched between a general road and a highway, and generates a signal for recording the operation as operation information. The dedicated road switch 28e is operated when the traveling road is switched between a general road and a dedicated road, and generates a signal for recording the operation as operation information.

  The front case 1b is provided with an audio output unit 1e composed of a plurality of small-diameter through holes, and a speaker 26 is disposed on the back side (the back side of the paper in FIG. 2) of the audio output unit 1e. Yes.

  As shown in FIG. 3, the digital tachograph 1 includes a CPU 2, a nonvolatile memory 3, a speed interface (hereinafter referred to as I / F) 10, an engine speed I / F 11, a GPS I / F 12, an external recording medium I / F 13, an accelerator opening. A sensor I / F 14, an audio I / F 16, a speaker 26, an LCD controller 17, a display unit 27, an operation unit I / F 18, an operation unit 28, a communication terminal I / F 19, and a power source (not shown) are provided.

  The power source is connected to a battery or an ignition switch of a vehicle on which the digital tachograph 1 is mounted, and supplies power to the digital tachograph 1 in conjunction with the ignition switch.

  The CPU 2 includes a ROM, a RAM, and the like, and controls the entire digital tachograph 1 by a control program stored in advance in the ROM. For example, the CPU 2 collects vehicle data based on signals from the speed I / F 10, the engine speed I / F 11, the GPS I / F 12, and the accelerator opening sensor I / F 14 as an operation recording process, and records it externally. For example, a recording process is performed on a portable memory card 23 such as a CF card connected to the media I / F 13. In addition to this, the CPU 2 performs a vehicle state display process to be described later.

  The speed I / F 10 is connected to a speed sensor 20 that outputs a travel pulse signal every time the vehicle travels a unit distance. The speed sensor 20 sends the travel pulse signal to the CPU 2 via the speed I / F 10. Output.

  The engine speed I / F11 is connected to a speed sensor 21 that detects the engine speed of the vehicle and outputs a signal indicating the engine speed. The engine speed sensor 21 is connected to the engine speed I / F11. A signal indicating the engine speed is output to the CPU 2 via.

  Connected to the GPS I / F 12 is a GPS receiver 22 that receives signals indicating positions and times supplied from a plurality of GPS satellites constituting the GPS. The GPS receiver 22 outputs a position signal and a time signal to the CPU 2 via the GPS I / F 12. This position signal includes latitude and longitude, that is, position information indicating the position of the vehicle.

  The external recording medium I / F 13 is provided with a reader / writer unit to which the memory card 23 can be attached and detached. The external recording medium I / F 13 records vehicle data or the like on the memory card 23 attached to the reader / writer unit or reads information recorded on the memory card 23 under the control of the CPU 2.

  The accelerator opening sensor I / F 14 is connected to an accelerator opening sensor 24 that measures the accelerator opening of the vehicle. The accelerator opening sensor 24 includes, for example, a computer or the like that is communicably connected to an electronic control unit (ECU) that controls a fuel injection device that supplies fuel to a vehicle engine. The fuel injection amount is acquired, and an accelerator opening signal including information (current fuel injection amount) corresponding to the acquisition result is output to the CPU 2 via the accelerator opening sensor I / F 14.

  The accelerator opening sensor is not limited to such a configuration. For example, the high accelerator opening range BH and the low accelerator opening range BL that indicate a part of the range of values that the accelerator opening can take in the vehicle state determination map information that will be described later are set to ranges that are each greater than 0%. In this case, the accelerator opening sensor may be constituted by a rotary encoder disposed on a swing shaft portion of an accelerator arm that is swingably attached to the vehicle. In such a configuration, the accelerator opening sensor measures the swing angle of the accelerator arm (that is, the accelerator opening) from the state where the accelerator pedal is not depressed, and via the accelerator opening sensor I / F14. An accelerator opening signal including measurement information corresponding to the measurement result is output to the CPU 2. In such a configuration, when the accelerator opening is 0% or less, the accelerator opening is detected as 0%.

  The audio I / F 16 is connected to a speaker 26 provided at the back of the audio output unit 1e of the front case 1b and arranged toward the driver's seat of the vehicle. The speaker 26 receives audio I / F from the CPU 2. The sound corresponding to the sound signal input through F16 is output.

  The LCD controller 17 is connected to the display unit 27 described above, and the display unit 27 displays images such as characters and graphics in accordance with image signals input from the CPU 2 via the LCD controller 17 on the display unit 27. To do.

  The operation unit 28 described above is connected to the operation unit I / F 18, and the operation unit 28 outputs a signal corresponding to the input operation to the CPU 2 via the operation unit I / F 18.

  For example, a communication terminal 29 capable of wireless communication using a public wireless communication line is connected to the communication terminal I / F 19, and the communication terminal 29 sends vehicle data to the information management device under the control of the CPU 2. Etc. are transmitted via the communication terminal I / F 19, or various information is received from the information management device and output to the CPU 2 via the communication terminal I / F 19.

  The nonvolatile memory 3 is an electrically erasable / rewritable read-only memory, and for example, a well-known EEPROM or flash memory is used. The nonvolatile memory 3 includes, for example, identification data unique to a vehicle on which the digital tachograph 1 is mounted, vehicle state determination map information used in vehicle state display processing described later, and fuel when the accelerator pedal is not depressed. Various information such as an ejection amount (fuel ejection amount at idling) and a fuel ejection amount (maximum fuel ejection amount) when the accelerator pedal is depressed to the maximum are stored.

  FIG. 5 shows an example of vehicle state determination map information. The vehicle state determination map information is information indicating the relationship between the vehicle acceleration and accelerator opening and the vehicle state. The vehicle state determination map information is, for example, based on the information collected by collecting the acceleration and accelerator opening during actual traveling and the state of the vehicle at that time in the vehicle type on which the digital tachograph 1 is mounted. Has been created. Of course, the vehicle state determination map information may be created based on a simulation or the like.

  The vehicle state determination map information of FIG. 5 sets a high acceleration range AH and a low acceleration range AL that is lower than the lower limit value for acceleration with the horizontal axis as acceleration and the vertical axis as accelerator opening, and the accelerator is opened. The degree is configured by setting a high accelerator opening range BH and a low accelerator opening range BL composed of values lower than the lower limit value thereof. And it is comprised including four area | regions (area | regions 1-4) divided by the high acceleration range AH and the low acceleration range AL, the high accelerator opening range BH, and the low accelerator opening range BL.

  Specifically, the vehicle state determination map information includes (1) “region 1” divided by a low acceleration range AL and a low accelerator opening range BL, and (2) a low acceleration range AL and a high accelerator opening range BH. (Region 2) partitioned by (3), (region 3) partitioned by high acceleration range AH and low accelerator opening range BL, and (4) partitioned by high acceleration range AH and high accelerator opening range BH “Area 4” is included. Then, the high acceleration range AH, the low acceleration range AL, the high accelerator opening range BH, and the low accelerator opening range BL are collected during actual driving so that each of these four areas shows different vehicle states. It is set based on information and information obtained by simulation.

  When the vehicle acceleration and accelerator opening are applied to the vehicle state determination map, points on the vehicle state determination map information indicated by the acceleration and accelerator opening are included in “region 1”, that is, the vehicle acceleration. When the region of the vehicle state determination map information specified by the accelerator opening is “region 1”, the acceleration is small and the accelerator opening is small, that is, the vehicle is efficient according to the accelerator opening. It shows that the vehicle is running at an acceleration.

  In addition, when the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is “region 2”, the acceleration is small and the accelerator opening is large, that is, the vehicle has the accelerator opening. It shows that it is in a state of not accelerating sufficiently despite being large.

  Further, when the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is “region 3”, the acceleration is large and the accelerator opening is small, that is, the vehicle has a small accelerator opening. Nevertheless, it shows that the vehicle is rapidly accelerating at an acceleration that requires attention.

  Further, when the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is “region 4”, the acceleration is large and the accelerator opening is large, that is, the vehicle is too open. This indicates that the vehicle is rapidly accelerating at a speed that requires attention.

  In the present embodiment, the high acceleration range AH is set to 3.00 [km / h / 0.5 seconds] or more and less than 6.00 [km / h / 0.5 seconds], and the low acceleration range AL is It is set to 0.00 [km / h / 0.5 seconds] or more and less than 3.00 [km / h / 0.5 seconds]. Moreover, the high accelerator opening range BH is set to 50 [%] or more and 100 [%] or less, and the low accelerator opening range BL is set to 0 [%] or more and less than 50 [%]. Yes.

  In the present embodiment, the high acceleration range AH, the low acceleration range AL, the high accelerator opening range BH, and the low accelerator opening range BL in the vehicle state determination map information are set to be constant ranges. However, it is not limited to this.

  For example, in the vehicle state determination map information, as shown in FIG. 6, the high accelerator opening range BH and the low accelerator opening range BL are set so as to change stepwise according to the detected acceleration. 7, a configuration in which the high accelerator opening range BH and the low accelerator opening range BL are set so as to change in proportion to the detected acceleration, and as shown in FIG. The opening range BH and the low accelerator opening range BL change in proportion to the detected acceleration, and the high acceleration range AH and the low acceleration range AL change in proportion to the detected accelerator opening. The high acceleration range AH and the low acceleration range AL are set to be a plurality of different acceleration ranges according to the accelerator opening of the vehicle, or the high accelerator opening range BH and Low accelerator opening range BL may be configured or is configured such that a plurality of different accelerator position range depending on the acceleration of the vehicle.

  By doing in this way, since each acceleration range and each accelerator opening range can be set finely according to the characteristics of the vehicle, the state of the vehicle can be accurately displayed.

  The vehicle state determination map information in the present embodiment is stored in a data table format in the nonvolatile memory 3 as an example. Of course, the storage format of the vehicle state determination map information is not limited to this, and the upper limit value and the lower limit in the high acceleration range AH, the low acceleration range AL, the high accelerator opening range BH, and the low accelerator opening range BL. The value may be stored in a form represented by a fixed value or a function.

  Next, the operation (vehicle state display processing) according to the present invention of the digital tachograph 1 having the above-described configuration will be described with reference to the flowchart of FIG.

  The driver receives the memory card 23 at the management company before boarding the vehicle. The memory card 23 stores vehicle identification data and information on loading / unloading areas that need to be loaded / unloaded on the day by an information management device installed in the management company. ing. The driver attaches the received memory card 23 to the external recording medium I / F 13 of the digital tachograph 1 and then turns on the ignition switch of the vehicle. In response to the ignition switch being turned on, power is supplied to the CPU 2. Thereafter, when the CPU 2 detects that an operation for requesting the start of recording of operation information is input to the operation unit 28, vehicle data such as the speed, the engine speed, the traveling position, and the accelerator opening in the vehicle are obtained. The operation recording process which collects and records as operation information on the memory card 23 is started. In parallel with this, the CPU 2 advances the process to step S110 of the vehicle state display process shown in FIG. 4 at a predetermined timing (for example, every 0.5 seconds).

  In step S110, the acceleration of the vehicle is detected. Specifically, the CPU 2 measures the pulse interval time of the travel pulse signal output each time the unit travels from the speed sensor 20, and determines the current speed based on the pulse interval time and the unit travel distance. It is detected and temporarily stored in a RAM built in the CPU 2. Then, the CPU 2 obtains a value obtained by subtracting the immediately preceding speed (that is, the speed 0.5 seconds before) stored in the RAM in the main process executed immediately before the current speed from the current speed [km / h / 0.5 seconds]. Then, the process proceeds to step S120.

In step S120, the accelerator opening is detected. Specifically, the CPU 2 determines the fuel injection amount indicated by the accelerator opening signal output from the accelerator opening sensor 24, the idling fuel injection amount and the maximum fuel injection amount stored in the nonvolatile memory 3. Based on this, the accelerator opening [%] is detected. Here, when the fuel injection amount indicated by the accelerator opening signal is K [L / sec], the fuel injection amount at idling is Ki [L / sec], and the maximum fuel injection amount is Km [L / sec], the accelerator is opened. Degree A is the following equation:
A = ((K−Ki) / (Km−Ki)) × 100 [%]
It is represented by
Then, the process proceeds to step S130.

  In step S130, CPU2 determines the area | region specified by applying the acceleration detected by step S110 and the accelerator opening detected by step S120 to the vehicle state determination map information memorize | stored in the non-volatile memory 3. FIG. When the specified area is “area 4”, the process proceeds to step S140 (“area 4” in S130). When the specified area is “area 3,” the process proceeds to step S150 (“area 3” in S130). ", The process proceeds to step S160 (" area 2 "in S130), and otherwise (" area 4 "," area 3 ", other than" area 2 "), the processing of this flowchart is terminated (" Other than that ").

  In step S140, it is notified that the vehicle is in a dangerous state and in a state of poor fuel consumption. Specifically, the CPU 2 determines that the vehicle is suddenly accelerating at an acceleration that requires attention due to excessive opening of the accelerator, and that the vehicle is in a dangerous and fuel-efficient state. For example, an audio signal is output to the speaker 26 via / F16 for outputting an audio message “Pippo, Pippo, accelerator pedal suddenly accelerates and fuel consumption has deteriorated”. The speaker 26 outputs the voice message in response to the voice signal. And the process of this flowchart is complete | finished. Note that in this specification, “display” includes not only visual display but also operations that are recognized by human senses such as auditory display (that is, notification by voice). Used.

  In step S150, it is notified that the vehicle is in a dangerous state. Specifically, the CPU 2 assumes that the vehicle is suddenly accelerating at an acceleration that requires attention despite the small opening of the accelerator, and uses the voice I / F 16 to notify the state. For example, a voice signal for outputting a voice message “Peeply, naturally accelerating rapidly” is output to the speaker 26. The speaker 26 outputs the voice message in response to the voice signal. And the process of this flowchart is complete | finished.

  In step S160, it is notified that the vehicle is in a state of poor fuel consumption. Specifically, the CPU 2 assumes that the vehicle is not sufficiently accelerated despite the large accelerator opening, and in order to notify the state, the speaker 26 via the audio I / F 16. On the other hand, for example, an audio signal for outputting an audio message “Beep, accelerator pedal is too depressed” is output. The speaker 26 outputs the voice message in response to the voice signal. And the process of this flowchart is complete | finished.

  Step S110 described above corresponds to the acceleration detection means in the claims, step S120 corresponds to the accelerator opening detection means in the claims, and step S130 corresponds to the vehicle state determination means in the claims. Steps S140, S150, and S160 correspond to vehicle state display means in the claims.

  Next, an example of the operation according to the present invention in the digital tachograph 1 of the present embodiment will be described.

  When the ignition switch is turned on, the digital tachograph 1 is supplied with power and starts operating. Then, the acceleration of the vehicle is detected and the opening of the accelerator is detected (S110, S120), and applied to the vehicle state determination map information stored in the nonvolatile memory 3, and the region included in the vehicle state determination map ( Regions 1 to 4) are specified (S130).

  For example, when the detected acceleration is 4.00 [km / h / 0.5 seconds] and the detected accelerator opening is 60 [%], “region 4” is specified in the vehicle state determination map information (S130). ("Region 4"). As a result, the digital tachograph 1 assumes that the vehicle is suddenly accelerating at an acceleration that requires attention due to excessive opening of the accelerator, and that the vehicle is in a dangerous and poor fuel consumption state. In order to notify that there is a voice message, the speaker 26 outputs a voice message saying “Pippo, Pippo, accelerator pedal suddenly accelerates and fuel consumption has deteriorated” (S140).

  When the detected acceleration is 3.00 [km / h / 0.5 seconds] and the detected accelerator opening is 10 [%], “region 3” is specified in the vehicle state determination map information (S130). “Region 3”). Thus, the digital tachograph 1 is informed that the vehicle is in a dangerous state, assuming that the vehicle is rapidly accelerating at an acceleration that requires attention despite the small accelerator opening. Then, a voice message “Peeply accelerating naturally” is output from the speaker 26 (S150).

  When the detected acceleration is 1.00 [km / h / 0.5 seconds] and the detected opening is 70 [%], “region 2” is specified in the vehicle state determination map information (in S130). “Area 2”). As a result, the digital tachograph 1 assumes that the vehicle is not sufficiently accelerated despite the large accelerator opening, so that the speaker 26 is informed that the vehicle is in a fuel-efficient state. Will output a voice message saying "Pip, accelerator pedal is too depressed."

  In addition, when the detected acceleration is 2.00 [km / h / 0.5 seconds] and the detected opening is 10 [%], in the vehicle state determination map information, “region 2”, “region 3”, It is specified that the area is other than “area 4” (“other” in S130). As a result, the digital tachograph 1 does not give any notification that the vehicle is not in a dangerous state or a fuel-efficient state.

  As described above, the digital tachograph 1 of this embodiment includes a CPU 2 (acceleration detection means P1) that detects vehicle acceleration, a CPU 2 (accelerator opening detection means P2) that detects the accelerator opening of the vehicle, and the CPU 2. By applying the detected acceleration and the accelerator opening detected by the CPU 2 to predetermined vehicle state determination map information indicating the relationship between the acceleration of the vehicle and the accelerator opening of the vehicle and the vehicle state, the vehicle state is determined. CPU2 (vehicle state determination means P3) for determination, and CPU2 (vehicle state display means P4) for displaying information according to the vehicle state determined by CPU2, CPU2 (vehicle state determination means P3) Is an area of the vehicle state determination map information specified by the acceleration detected by the CPU 2 and the accelerator opening detected by the CPU 2. A region (“region 3”) defined by a predetermined high acceleration range AH that is a part of a range of values that can be taken and a predetermined low accelerator opening range BL that is a part of a range of values that can be taken by the accelerator opening of the vehicle. "), The vehicle is determined to be in a dangerous state.

  Further, the CPU 2 (vehicle state determination means P3) further includes a region of the vehicle state determination map information specified by the acceleration detected by the CPU 2 and the accelerator opening detected by the CPU 2 in the high acceleration range AH and the low acceleration range AH. A region (“region 4”) partitioned by a predetermined high accelerator opening range BH, which is another part of the range of values that can be taken by the accelerator opening of the vehicle that is larger than the upper limit value of the accelerator opening range BL The vehicle is in a dangerous state and is determined to be in a state of poor fuel consumption.

  Further, the CPU 2 (vehicle state determination means P3) further determines that the region of the vehicle state determination map information specified by the acceleration detected by the CPU 2 and the accelerator opening detected by the CPU 2 is a lower limit of the high acceleration range AH. When the vehicle is a region (“region 2”) divided by a predetermined low acceleration range AL and a high accelerator opening range BH, which is another part of the range of values that can be taken by the acceleration of the vehicle that is smaller than the value, It is configured to determine that the vehicle is in a state of poor fuel consumption.

  As described above, according to the present embodiment, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is a region divided by the predetermined high acceleration range AH and the predetermined low accelerator opening range BL. ("Area 3"), it is determined that the vehicle is in a dangerous state and information corresponding to the state is displayed. Therefore, by appropriately setting the vehicle state determination map information, the vehicle Even if the accelerator opening is small, the vehicle is suddenly accelerating at an acceleration that requires attention, that is, the vehicle is operated in a dangerous state that causes sudden acceleration exceeding the acceleration corresponding to the accelerator opening. The driver can be made aware that Accordingly, the above-described state can be displayed in real time based on the acceleration and the accelerator opening acquired during the traveling of the vehicle, the driver can be alerted during the traveling, and the driving of the vehicle can be supported.

  Further, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is a region (“region 4”) partitioned by a predetermined high acceleration range AH and a predetermined high accelerator opening range BH. When it is determined that the vehicle is in a dangerous state and in a fuel-efficient state, and information corresponding to the state is displayed, the vehicle state determination map information is appropriately set so that the vehicle Thus, the driver can be made aware that the vehicle is suddenly accelerating at an acceleration requiring attention due to excessive opening of the accelerator, that is, the vehicle is in a dangerous and fuel-efficient driving operation.

  Further, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is a region divided by a predetermined low acceleration range AL and a predetermined high accelerator opening range BH (“region 2”). Therefore, the vehicle is determined to be in a state of poor fuel economy, and information corresponding to the state is displayed. Therefore, by appropriately setting the vehicle state determination map information, the vehicle has an accelerator opening degree. The driver is in a state where the vehicle is not sufficiently accelerated despite being large, that is, the vehicle is in a state of poor fuel economy that results in a slow acceleration that is less than the acceleration corresponding to the accelerator opening. Can be recognized.

  In the above-described embodiment, the state of the vehicle is notified by outputting a voice message from the speaker 26. However, the present invention is not limited to this. For example, instead of the voice message, or in parallel with the output of the voice message, the same message as the voice message may be displayed on the display unit 27 so that the state of the vehicle is set. Or, it is provided with LEDs of a plurality of colors (for example, red, orange, yellow, etc.), each vehicle state is assigned to each color, and instead of displaying a message, the LED emits light at the display timing of the message (that is, Display).

  In the present embodiment, in the vehicle state display process shown in the flowchart of FIG. 4, the regions of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening are “region 2”, “region 3”, “region”. When it is other than “4” (that is, when “other than those” in S130), the process ends without performing any processing, but the present invention is not limited to this. For example, in step S130 in the flowchart of FIG. 4, it is further determined that the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is “region 1”. You may make it display the message "it is in a favorable state" on the display part 27, or you may make it provide LED of green and blue and make the said LED light-emit.

  That is, the CPU 2 (vehicle state determination means P3) further determines that the region of the vehicle state determination map information specified by the acceleration detected by the CPU 2 and the accelerator opening detected by the CPU 2 is the low acceleration range AL and When the vehicle is in a region partitioned by the low accelerator opening range BL (“region 1”), the vehicle may be determined not to be in a dangerous state and not in a fuel-efficient state.

  By doing in this way, the region of the vehicle state determination map information specified by the vehicle acceleration and the accelerator opening is further divided into a region divided by a predetermined low acceleration range AL and a predetermined low accelerator opening range BL (“ Area 1 ”), it is determined that the vehicle is not in a dangerous state and not in a fuel-efficient state, and information corresponding to the state is displayed (message display or LED light emission). By appropriately setting the judgment map information, the vehicle is driving at a high acceleration that is efficient according to the accelerator opening, that is, a driving operation that is in a safe and fuel-efficient state. The driver can be made aware of this.

  Further, in this embodiment, a digital tachograph as an example of a driving support device has been described. However, the present invention is not limited to this. For example, the present invention is applied to a taximeter, a car navigation device, and the like. Also good.

  In the present embodiment, the digital tachograph supports driving by notifying the state of the vehicle in real time during traveling, but the present invention is not limited to this. For example, in an information management device composed of a personal computer or the like installed in a management company that manages the operation of a vehicle, the operation information including the vehicle speed and the accelerator opening recorded in the memory card 23 by the digital tachograph 1 It may be configured to use the same processing as the vehicle status display processing described above to analyze the vehicle status afterwards and display it on the screen of a personal computer or printing paper.

  By doing so, it is possible to analyze the acceleration and accelerator opening collected during the traveling of the vehicle after traveling, display the state of the vehicle, and provide driving guidance to the driver after traveling, thereby supporting the driving of the vehicle be able to.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Digital tachograph (driving support device)
2 CPU (acceleration detection means, accelerator opening detection means, vehicle state determination means, vehicle state display means)
3 Non-volatile memory AH High acceleration range AL Low acceleration range BH High accelerator opening range BL Low accelerator opening range

Claims (4)

In a driving support device that supports driving of a vehicle,
Acceleration detecting means for detecting acceleration of the vehicle;
An accelerator opening detecting means for detecting an accelerator opening of the vehicle;
The acceleration detected by the acceleration detecting means and the accelerator opening detected by the accelerator opening detecting means indicate the relationship between the acceleration of the vehicle and the accelerator opening of the vehicle and the state of the vehicle. Vehicle state determination means for applying the predetermined vehicle state determination map information to determine the state of the vehicle;
Vehicle state display means for displaying information according to the state of the vehicle determined by the vehicle state determination means,
The vehicle state determination unit is configured such that an area of the vehicle state determination map information specified by the acceleration detected by the acceleration detection unit and the accelerator opening detected by the accelerator opening detection unit is the vehicle. Is a region partitioned by a predetermined high acceleration range that is a part of a range of values that the acceleration of the vehicle can take and a predetermined low accelerator opening range that is a part of the range of values of the accelerator opening of the vehicle The driving support device is configured to determine that the vehicle is in a dangerous state.   The vehicle state determination means further includes an area of the vehicle state determination map information specified by the acceleration detected by the acceleration detection means and the accelerator opening detected by the accelerator opening detection means. An area defined by a predetermined high accelerator opening range that is another part of a range of values that can be taken by the accelerator opening of the vehicle, which is larger than the upper limits of the high acceleration range and the low accelerator opening range. 2. The driving support device according to claim 1, wherein the driving support device is configured to determine that the vehicle is in a dangerous state and in a state of poor fuel consumption.   The vehicle state determination means further includes the region of the vehicle state determination map information specified by the acceleration detected by the acceleration detection means and the accelerator opening detected by the accelerator opening detection means. When the vehicle is an area defined by a predetermined low acceleration range that is another part of the range of values that can be taken by the acceleration of the vehicle, which is smaller than the lower limit value of the high acceleration range, and the high accelerator opening range. The driving support device according to claim 1, wherein the vehicle is configured to determine that the vehicle is in a state of poor fuel consumption.   The vehicle state determination means further includes the region of the vehicle state determination map information specified by the acceleration detected by the acceleration detection means and the accelerator opening detected by the accelerator opening detection means. The vehicle is configured to determine that the vehicle is not in a dangerous state and in a poor fuel consumption state when the vehicle is in a region partitioned by the low acceleration range and the low accelerator opening range. The driving support apparatus according to any one of Items 1 to 3.

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