JP2011107909A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device easily equipped with a support function in the case of starting an operation. <P>SOLUTION: The navigation device is provided with a control part for detecting the location of a vehicle by using a map, and when detecting that the vehicle has stopped in a prescribed time or more in an area where there is possibility of drinking (steps S1 to S5), this control part performs warning processing in the case of starting driving (step S6). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a navigation apparatus for guiding a vehicle from a current position to a destination using a map.

  As a vehicle-mounted device mounted on a vehicle such as an automobile, a navigation device that guides the vehicle from a current position to a destination using a map is known (for example, see Patent Document 1). This type of navigation device is provided with functions such as traffic information notification, hands-free telephone control, music provision, and DVD playback, as well as guidance to a destination.

JP 2009-121876 A

However, although the conventional navigation device has various functions for supporting a comfortable drive during driving, it does not have a support function at the start of driving.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the conventional technology and to provide a navigation device that simply has a support function at the start of driving.

In order to achieve the above object, the present invention provides a navigation device that guides a vehicle from a current position to a destination using a map, and includes a control unit that detects the position of the vehicle using the map. Is characterized by performing a warning process at the start of driving when it is detected that the vehicle has stopped in an area where drinking is possible for a predetermined time or more.
According to this invention, the control unit that detects the position of the vehicle using the map is provided, and when the control unit detects that the vehicle has stopped in an area where drinking is possible for a predetermined time or more, Since the warning process is performed, it is possible to call the driver by guessing the situation of drunkness when the driver starts driving while using the hardware and the map used in the basic function of the navigation device. Therefore, it is possible to provide a navigation device that simply has a support function at the start of operation.

  In the above configuration, when the vehicle stops, the control unit determines whether or not the stop position is the region where there is a possibility of drinking, and when the vehicle starts driving, the stop time is a predetermined time or more. It may be determined whether or not the vehicle has elapsed, and the warning process may be performed when the stop position is in the area and the stop time has exceeded a predetermined time. According to this configuration, it is not necessary to operate the navigation device specially while the vehicle is stopped, and it is possible to avoid complication of the configuration and power consumption.

Further, in the above configuration, the control unit performs a process of determining whether or not the stop time has elapsed for a predetermined time or more when the vehicle is started only when the stop position is in the region. The processing amount of the navigation device at the start of operation can be reduced.
In the above configuration, the control unit stores the stop time in a non-volatile memory when the stop position is in the area, and stores the current time and the non-volatile memory when the vehicle starts to operate. It may be determined whether or not the stop time of the vehicle has exceeded a predetermined time based on the stop time. According to this configuration, the stop time can be accurately obtained without causing the navigation device to count the stop time while the vehicle is stopped.

In the above configuration, the control unit performs the warning process when the stop position is the area, the stop time includes a night time zone, and the stop time has exceeded a predetermined time. , Can more accurately guess the situation of drunk, avoid the situation of excessive warning.
In the above configuration, a vehicle stop processing unit may be provided to stop the vehicle from starting when the stop position is in the area and the stop time has elapsed for a predetermined time or more. In this case, drunk driving can be forcibly prohibited.

  According to the present invention, while using the hardware and the map used in the basic function of the navigation device, the driver can guess the situation of drunkness when starting driving, and can call attention. Support function can be realized easily.

1 is a block diagram of a navigation device according to a first embodiment of the present invention. It is a flowchart which shows a drinking countermeasure process. It is a flowchart which shows the drunk countermeasure process of the navigation apparatus which concerns on 2nd Embodiment. It is a figure which shows the display content of the reaction time game. It is a block diagram of the navigation apparatus concerning a 3rd embodiment. It is a flowchart which shows a drinking countermeasure process.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a block diagram of a navigation apparatus according to the first embodiment of the present invention.
The navigation device 10 is a vehicle-mounted navigation device that is mounted on a vehicle that is a moving body and has a navigation function that guides the vehicle from a current position to a destination using a map. As shown in FIG. 1, the navigation device 10 includes a position detection unit 20 for detecting the current position of the vehicle, a control unit 30 that controls each unit of the navigation device 10, a storage unit 40 that stores various types of information, An information output unit 50 that performs audio output and image output, and an instruction input unit 60 that inputs user instructions are provided.

The position detection unit 20 includes an absolute position and direction detection unit 21 that detects the absolute position and direction of the vehicle, a relative direction detection unit 22 that detects a relative direction and the like, and a vehicle data processing unit 23 that inputs a signal indicating the vehicle status. It has.
The absolute position and direction detection unit 21 has a GPS unit, receives GPS radio waves from GPS satellites via the GPS antenna 24, and determines the current location of the vehicle (own vehicle position) from the GPS signals superimposed on the GPS radio waves. The indicated position coordinates and moving direction are obtained by calculation, and these pieces of information are output to the control unit 30.
The relative azimuth detecting unit 22 includes a gyro sensor and an acceleration sensor, detects a relative azimuth of the vehicle (for example, a turning amount in the yaw axis direction) by the gyro sensor, and accelerates the vehicle (for example, a traveling direction) by the acceleration sensor. The vehicle inclination) is detected and the information is output to the control unit 30.

A vehicle speed pulse signal SA and a parking brake signal SB are input to the vehicle data processing unit 23 as signals indicating vehicle conditions. Here, the vehicle speed pulse signal SA is a pulse signal proportional to the vehicle speed, and the parking brake signal SB is a signal indicating whether a parking brake provided in the vehicle is in an activated state or inactive state.
The vehicle data processing unit 23 functions as a vehicle speed detection unit that detects a vehicle speed based on the vehicle speed pulse signal SA, and determines whether the vehicle 1 is running or stopped based on the vehicle speed pulse signal SA and the parking brake signal SB. It also functions as a stop detection unit that determines whether or not it has been performed. These detection results are output to the control unit 30.

That is, the navigation apparatus 10 acquires the positioning information (position and moving direction) of the vehicle at a predetermined time interval by the absolute position / azimuth detection unit 21, and also uses the relative direction detection unit 22, the vehicle data processing unit 23, and the like. The moving direction and the vehicle speed are obtained, and the relative position from the absolute position measured by GPS is acquired as positioning information (position, moving direction, speed) corresponding to the current position of the vehicle.
This positioning information is used for map matching processing for matching the position of the vehicle to the position on the map, and the current position on the map is specified. This makes it possible to display the position of the vehicle together with the surrounding map, to search the route from the current location to the destination, and to guide the route to the destination.

The control unit 30 includes a main CPU and its peripheral circuits, and functions as a computer that controls each unit of the navigation device 10. The control unit 30 calculates positioning information (position, moving direction, speed) indicating the current position of the vehicle based on information obtained from the absolute position and direction detection unit 21, the relative direction detection unit 22, the vehicle data processing unit 23, and the like. It also functions as an arithmetic processing unit that executes arithmetic processing, the above-described map matching processing, arithmetic processing for route search and route guidance, and the like. It should be noted that the map matching process can widely apply a known map matching process.
The peripheral circuit includes a clock unit 35 such as a real time clock that clocks the current time, and the control unit 30 appropriately acquires the time clocked by the clock unit 35 and displays the current time. Note that the timer 35 may be a circuit configured outside the controller 30.

The storage unit 40 includes a ROM (Read Only Memory) 41, a DRAM (Dynamic Random Access Memory) 42, a SRAM (Static Random Access Memory) 43, and a HDD (Hard Disk Drive) device 44.
The ROM 41 is a read-only memory that stores a control program executed by the control unit 30 and various data. The DRAM 42 is a volatile memory, and is a work memory that temporarily stores data used by the control unit 30 for calculations and the like. The SRAM 43 is a non-volatile memory, and can store data while the navigation device 10 is powered off, such as when the accessory power is off (ACC OFF) and the vehicle engine is stopped.

The HDD device 44 is a large-capacity storage device that stores a database for searching for map information and destinations. Map information is a map for navigation (map data), map image data for display, road data used for route guidance, location information of each point on the map, city name assigned to each point, It includes address information such as street addresses, facility information related to facilities at each point, and the like.
The facility information includes information for specifying the facility, such as the official name, abbreviation, address, telephone number, and map position of each facility. In this embodiment, at least alcohol is included in this facility. The restaurant and parking lot to be provided are included. For this reason, if the map information is searched using information on the current position of the vehicle as a search key, the vehicle is located near a parking lot of a restaurant (including a parking lot adjacent to a restaurant) or a downtown area where many restaurants exist. It is possible to detect whether or not the vehicle is located in a parking lot. As this map information, publicly known map information including information on restaurants and parking lots can be widely applied.

The information output unit 50 is a unit that performs audio output and image output. Under the control of the control unit 30, the information output unit 50 displays various information such as a map, a route to a destination, and a warning message on the display device 51 formed by a liquid crystal display device or the like. A display processing unit 52 that displays an image and a sound output unit 54 that drives the speaker 53 to output various sounds such as a guidance sound and a warning message are provided. The speaker 53 may be either a speaker installed in advance in the vehicle or a speaker built in the navigation device 10.
The instruction input unit 60 detects the operation of the operator operated by the user (occupant) and the operation of the touch panel 61 arranged on the display screen of the display device 51, and inputs various instructions from the user to control the control unit. 30 is notified.

By the way, in this Embodiment, when the control part 30 has stopped in the area where drinking is possible for more than predetermined time, it has the function to perform the drinking countermeasure process which performs a warning process at the time of a driving | operation start. .
FIG. 2 is a flowchart showing the operation in this case.
First, if a driver drives a vehicle and parks (stops) in an area where there is a possibility of drinking (hereinafter referred to as a drinking inference area), specifically, a parking lot of a restaurant (adjacent to a restaurant) If the vehicle is parked in a parking lot around the downtown area, the control unit 30 detects that the vehicle is parked in the estimated drinking area (step S1), and proceeds to the subsequent step S2.
That is, the control unit 30 monitors whether or not the vehicle is parked (stopped) based on the vehicle speed pulse signal SA and the parking brake signal SB. When the vehicle is parked, map information is obtained using the current position as a search key. It searches and performs the process which determines whether the vehicle parked in the drinking guessing area. For this reason, when the vehicle is parked, it can be reliably and promptly detected whether or not the vehicle is parked in the drinking estimation area.

  In the process of step S2, the control unit 30 determines whether or not the current time is a night time zone (in this configuration, from 18:00 to 3 o'clock) when there is a high possibility of drinking. If it is not the night time zone (step S2: No), the control unit 30 terminates the processing. On the other hand, if it is the night time zone (step S2: Yes), the SRAM 33 uses the current time as the parking start time (stop time). (Step S3). Thereafter, the control unit 30 determines whether or not the engine of the vehicle has been restarted (= whether or not the engine has been started from a stopped state) and waits until it is restarted (step S4).

  Here, when the vehicle is parked, the driver turns off the key and stops the engine, so that the accessory power supply is turned off (ACC OFF), and the supply of operating power to the navigation device 10 is cut off. Since the series of processes in steps S1 to S4 is executed in a very short time, it is executed before the power supply to the navigation device 10 is cut off (before the power is turned off), and the parking start time (stop time) is ensured. Saved. In addition, since the supply of operating power is cut off in the standby process in step S4, the process is interrupted in step S4, the driver keys on, the accessory power supply is turned on (ACC ON), and the navigation apparatus 10 receives operating power. When supplied, the control unit 30 resumes the process from step S4.

When the engine is restarted (step S4: Yes), the control unit 30 reads the parking start time (stop time) stored in the SRAM 43, and obtains the difference between the parking start time and the current time to determine the parking time ( Stop time) is calculated, and it is determined whether or not the parking time is equal to or greater than a predetermined threshold value (2 hours in this example) (step S5).
When the parking time is less than 2 hours (step S5: No), the control unit 30 terminates the process. On the other hand, when the parking time is 2 hours or more (step S5: Yes), the driver is warned about drinking. Processing is performed (step S6).
In this case, the control unit 30 causes the display processing unit 52 to display a warning message on the screen of the display device 51 (“If you are drinking, please use the driving agency service”) and the audio output unit 54. Thus, the sound corresponding to the warning message is output from the speaker 53 as sound. As a result, when the driver gets into the vehicle and starts driving, a warning about drinking is performed, and caution can be urged not to drive drunk (drunken driving or drunk driving).

  As described above, the navigation device 10 according to the present embodiment performs warning processing at the start of driving when it detects that the vehicle has been parked (stopped) for a predetermined time (2 hours) or more in an area where drinking is likely (drinking drinking area). Therefore, it is possible to call attention by guessing the situation of drunkness when the driver starts driving. Moreover, the navigation device 10 uses the hardware and the map used for the basic function of the navigation device (the function of specifying the position of the vehicle using the map) and the map as they are, so that at the start of driving that prevents drunk driving at the start of driving. Can be realized easily and inexpensively.

Also, when the vehicle is parked, it is determined whether the parking position is an area where drinking is likely (drinking drinking area), and whether the parking time has passed for a predetermined time or longer when the vehicle is started to operate. Since the warning process is selectively performed based on these determination results, the navigation device 10 only needs to operate when the vehicle is parked and when the vehicle is started to operate. For this reason, it is not necessary to operate the navigation apparatus 10 during parking (while the accessory power supply is turned off (ACC OFF) after the vehicle is stopped), and the complexity of the configuration and the power consumption can be avoided.
Further, only when the parking position is the drinking alcohol estimation area, when the vehicle is started to drive, the process of determining whether or not the parking time has passed for a predetermined time or more is performed. The amount of processing can be reduced. This type of navigation device 10 may perform various processes for restarting navigation such as acquisition of the current position and restart of the interrupted navigation process at the start of driving. In this embodiment, since the processing amount of the navigation device at the start of driving is reduced, the delay in resuming navigation can be suppressed.

Further, when the vehicle is parked, the parking start time (stop time) is stored in the SRAM 43 which is a nonvolatile memory, and when the vehicle is started to operate, parking is performed based on the parking start time stored in the SRAM 43 and the current time. Since it is determined whether or not the time has exceeded a predetermined time, the parking time can be accurately determined without causing the navigation device 10 to count the parking time during parking.
In addition, since the process of determining whether or not the parking time has elapsed for a predetermined time or more is performed only when the parking position is the drinking alcohol estimation area and the parking time includes the night time zone, the processing amount of the control unit 30 is reduced. In addition to being able to reduce this, it is possible to more accurately estimate the alcoholic situation and avoid excessive warnings.

Second Embodiment
FIG. 3 is a flowchart showing the drinking countermeasure process of the navigation device 10 according to the second embodiment. In this flowchart, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
When the parking time is 2 hours or more (step S5: Yes), the control unit 30 of the navigation device 10 performs a test (reaction time game) for testing the driver's reaction time in a game format (step S16).

FIG. 4 shows the display contents in this case. As shown in this figure, an image imitating an operation button (hereinafter referred to as an operation button image) X is displayed on the display screen 51A of the display device 51 (1) → (2) → (3) → (4 ) → (5) →... Is displayed in a random position for a short time (1-2 seconds), and whether or not the operation button image X has been pressed via the touch panel 61 is determined. The monitoring process is continuously performed for a predetermined time.
FIG. 4 shows a state in which the operation button image X shown in (4) is displayed. At this time, the display of the operation button image X shown in (1), (2), and (3) is not finished. , (5) shows the operation button image X displayed after this.

And the control part 30 calculates | requires the driver's reaction time TA by calculating | requiring the difference of the display timing of the operation button image X, and the pressing timing when this operation button image X was pressed, and calculating these average values. Then, it is determined whether there is a possibility of drinking based on this reaction time TA (step S17).
Usually, when the person is drinking, the reaction time becomes longer. Therefore, when the reaction time TA is longer than the predetermined reference time T0 (TA> T0), it is determined that there is a possibility of drinking. When the game time is short, it may happen that the reaction time TA happens to be short. Therefore, it is desirable that the game time is sufficiently long so that it can be determined whether the game time is drunk.

  If there are multiple drivers, register the age and normal response time of each individual in advance, select the current driver before the reaction time game, etc. Based on the time, an allowable reaction time T1 is set, and when the measured reaction time TA is longer than the time obtained by adding the allowable time T1 to the reference time T0 (TA> (T0 + T1)), the possibility of drinking It may be determined that there is. In this case, it is possible to determine whether or not the person is drinking in consideration of age difference or individual difference such as a young person or an elderly person, and the drinking determination can be performed with higher accuracy.

Next, when it is determined that there is no possibility of drinking (step S17: No), the control unit 30 ends the process, whereas when it is determined that there is a possibility of drinking (step S17: Yes), Warning processing regarding drinking is performed for the driver (step S18).
In this case, since there is a high possibility that the driver is drunk (possibly drunk), the control unit 30 causes the display processing unit 52 to display a strong warning message (“ If you have drunk, let's use the driving agency service. ”) Is displayed, and the voice output unit 54 causes the speaker 53 to output a voice corresponding to the warning message. Thus, when the driver gets into the vehicle and starts driving, a strong warning about drinking is issued, and attention can be urged not to drive drunk (drunken driving or drunk driving).

  As described above, according to the present embodiment, the determination of drinking is performed based on the reaction time of the driver. Therefore, in addition to the various effects of the first embodiment, only when the possibility of drinking is higher. Warning processing can be performed, and a situation where warning is given when the possibility of drinking is low can be avoided.

<Third Embodiment>
FIG. 5 is a block diagram of the navigation device 10 according to the third embodiment, and FIG. 6 is a flowchart showing a drinking countermeasure process. As shown in FIG. 5, the navigation apparatus 10 includes a vehicle stop processing unit 71 that can stop the start of the vehicle. The vehicle stop processing unit 71 notifies the engine control unit of the vehicle of engine start prohibition under the control of the control unit 30, thereby prohibiting engine start and stopping the vehicle from starting.

FIG. 6 is a flowchart showing the drinking countermeasure process of the navigation device 10, and the same parts as those in the above embodiments are given the same reference numerals and the description thereof is omitted.
The control unit 30 of the navigation device 10 differs from the warning process shown in step S28 when it is determined that there is a possibility of drinking as a result of the reaction time game (step S16) (step S17: Yes).
In this warning process, the control unit 30 causes the display processing unit 52 to display a warning message (for example, “Are you drunk?) On the screen of the display device 51 and a message to stop the engine ( "The engine is stopped." Is displayed, the corresponding sound is displayed from the speaker 53, and the start of the vehicle is stopped by prohibiting the engine start by the vehicle stop processing unit 71.
Therefore, when the possibility of drinking is high, drunk driving can be prevented from being completely completed.

In this case, when a predetermined time elapses after the transition to the start stop state, the control unit 30 notifies the engine control unit of permission to start the engine from the vehicle stop processing unit 71 and releases the start stop state. That is, when the possibility of drinking is high at the start of driving, driving by the driver is forcibly prohibited until a predetermined time has elapsed from the start of driving.
Even when the vehicle is stopped, driving by a driver who has not drunk, such as a driving agency service, is permitted. That is, the reaction time game is configured to be re-executable, and when it is determined that there is no possibility of drinking as a result of the game, the control unit 30 releases the start stop state by the vehicle stop processing unit 71. As a result, the driving agency service can be used.

The above-described embodiment is merely one aspect of the present invention, and can be arbitrarily modified within the scope of the present invention. For example, you may change as follows about the parking time (stop time) which estimates that it drank. First, as in the first and second embodiments, if the warning message is displayed or the voice is only output, it is set to a short time, and the warning is frequently given to raise the driver's consciousness even when parking for a short time. Also good. On the other hand, when the engine is not forced to start as in the third embodiment, it may be set longer so that it does not operate erroneously.
In addition, depending on the parking time (stop time) and the time zone in which it is estimated that alcohol has been drunk, only the warning process is performed for the first hour or the first hour of the night time zone (for example, from 18:00 to 19:00). Thereafter, warning processing and engine stop (vehicle stop) may be performed.

  In the above-described embodiment, the case where the vehicle data processing unit 23 determines whether or not the vehicle has stopped based on the vehicle speed pulse signal SA and the parking brake signal SB has been described. It may be determined whether or not the vehicle is stopped by only one of the signal SA and the parking brake signal SB. In this case, when the vehicle speed detected from the vehicle speed pulse signal SA is zero, when the parking brake signal SB is activated, or when the vehicle speed detected from the vehicle speed pulse signal SA is zero, the parking brake signal SB is activated. In the state, it may be determined that the vehicle has stopped.

Further, in the above-described embodiment, the case where it is determined whether or not the parking start time includes the night time zone has been described, but instead of or in addition to this, the driving start time includes the night time zone. It may be determined whether or not. In short, it is only necessary to determine whether or not the vehicle is stopped at a time when the possibility of drinking is high, and whether or not the stop time from the parking start time to the driving start time includes a night time zone where there is a high possibility of drinking Can be determined.
In addition, there are drinking liquor stores that supply alcohol even when it is not at night, so the process of determining whether the stop time includes a night time zone where there is a high possibility of drinking is omitted. A warning process may be performed when the stop time satisfies the above conditions. The vehicle on which the navigation device 10 of the present invention is mounted is not limited to automobiles, but means vehicles in a broad sense including motorcycles and bicycles.

DESCRIPTION OF SYMBOLS 10 Navigation apparatus 20 Position detection part 30 Control part 35 Timekeeping part 40 Memory | storage part 43 SRAM (nonvolatile memory)
50 Information Output Unit 60 Instruction Input Unit 71 Vehicle Stop Processing Unit

Claims (6)

In a navigation device that uses a map to guide a vehicle from its current location to its destination
A control unit that detects the position of the vehicle using the map, and the control unit performs warning processing at the start of driving when detecting that the vehicle has stopped in an area where drinking is possible for a predetermined time or more; A featured navigation device.   When the vehicle stops, the control unit determines whether or not the stop position is the region where there is a possibility of drinking, and whether or not the stop time has elapsed for a predetermined time or longer when the vehicle starts to drive. The navigation apparatus according to claim 1, wherein the warning process is performed when the stop position is in the area and the stop time has exceeded a predetermined time.   The said control part performs the process which determines whether the stop time passed more than predetermined time, when the said vehicle is started drive, only when the stop position is the said area. 3. The navigation device according to 2.   The control unit stores the stop time in a nonvolatile memory when the stop position is in the area, and when the vehicle starts operation, the current time and the stop time stored in the nonvolatile memory The navigation device according to claim 2 or 3, wherein it is determined whether or not the stop time of the vehicle has elapsed for a predetermined time or more based on the above.   The control unit performs the warning process when the stop position is the area, the stop time includes a night time zone, and the stop time has exceeded a predetermined time. The navigation device according to any one of 1 to 4.   6. The vehicle stop processing unit according to claim 1, further comprising a vehicle stop processing unit configured to stop the start of the vehicle when the stop position is in the area and the stop time has elapsed for a predetermined time or more. Navigation device.

Images