JP4948484B2 - Hazardous Location Avoidance Support Device - Google Patents

Description

  The present invention relates to a dangerous point avoidance support device that is mounted on, for example, a navigation device and supports avoidance of a dangerous point existing on a route to a destination.

  Conventionally, as one of the dangerous point avoidance support devices, there is known a dangerous point information display device capable of specifically notifying the driver what kind of danger may exist when the vehicle travels in a dangerous area. (For example, refer to Patent Document 1). In this danger spot information display device, the vehicle-mounted device CPU displays, based on the position of the vehicle, when the vehicle is assumed to pass a near-miss point in the near-miss map recorded as a database in the data storage unit. Information on risk factors at the near-miss point is projected on the front window by the device, and is superimposed on the actual front view and displayed as a visual image.

JP 2007-51973 A

  However, in the danger location information display device disclosed in Patent Document 1 described above, the vehicle is subject to external conditions that change from moment to moment, such as situations in which external communication becomes impossible, tire wear, rain not in the weather information, and the like. Because it cannot be monitored in real time only, there is a problem that it is impossible to cope with an unexpected situation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a risk location avoidance support device that can assist in avoiding a risk location even if an unexpected situation occurs. is there.

In order to solve the above-mentioned problem, a dangerous point avoidance assisting device according to the present invention inputs a data storage unit that stores map data and dangerous point data that represents a dangerous point, a positioning unit that measures a current position, and a destination Determines whether to use the normal route or the avoidance route based on the risk factor risk unit determined by the risk factor determination unit, the risk factor determination unit that determines whether there is a risk factor risk When the use route determination unit and the use route determination unit determine that the normal route should be used, the recommended route from the current position measured by the positioning unit to the destination input by the input unit, When the normal route calculation unit that calculates based on the map data read from the data storage unit and the use route determination unit determine that the avoidance route should be used, the positioning unit performs measurement. The recommended route that avoids hot spots to the destination that is input by the input unit from the current position, and a bypass route calculation unit for calculating, based on the map data and the hazard data read from the data storage unit, risk factors The determination unit uses at least one of time zone or tire wear as a risk factor, and determines that there is a danger when the time zone or the tire is worn around the danger point .

  According to the risk location avoidance support device according to the present invention, the normal route or the avoidance route can be provided to the user according to the presence or absence of the risk of the risk factor, so that the avoidance of the risk location is supported even if an unexpected situation occurs. be able to.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a dangerous spot avoidance assistance apparatus according to Embodiment 1 of the present invention. This danger location avoidance support device is realized by being incorporated in a navigation device, and includes a control unit 10, an input unit 11, a positioning unit 12, a risk factor judgment unit 13, a flag judgment value setting unit 14, and a data storage unit 15. And a display unit 16.

  The control part 10 is comprised, for example from the microcomputer, and controls the whole dangerous location avoidance assistance apparatus. Details of the control unit 10 will be described later.

  The input unit 11 is used, for example, to input a departure point, a transit point, a destination, or the like, and is placed on an input button, a remote controller (remote controller), and a display unit 16 provided on a body panel (not shown). A touch panel, a voice input microphone (not shown) for voice operation, or a combination thereof. Data input from the input unit 11 is sent to the control unit 10 as operation data.

  The positioning unit 12 calculates the current position of the host vehicle based on signals obtained from a GPS (Global Positioning System) receiver, a vehicle speed sensor, and an angular velocity sensor (all of which are not shown), and the control unit serves as the host vehicle position data. Send to 10.

  The risk factor determination unit 13 includes a night detection unit 21, an outside air temperature detection unit 22, a raindrop detection unit 23, and a tire wear detection unit 24.

  The night-time detection unit 21 is based on the current time and season obtained from a clock and calendar (not shown) built in the navigation device. 17:00 to 7 o'clock), and if the surroundings are dark, that is, the nighttime zone, the night driving flag as one of the risk factors is set (set to "1"). The night driving flag is cleared (set to “0”). The setting state of this night driving flag is sent to the control unit 10.

  The outside air temperature detection unit 22 determines the outside air temperature based on a signal obtained from a thermometer (not shown) mounted on the vehicle. For example, when the outside air temperature becomes 0 ° C. or less, there is a risk of road surface freezing. Therefore, the outside air temperature flag is set as one of the risk factors, and when the outside air temperature is higher than 0 ° C, the outside air temperature flag is cleared. The setting state of the outside air temperature flag is sent to the control unit 10.

  The raindrop detection unit 23 determines whether or not there is rain based on a signal obtained from a raindrop detection sensor (not shown) mounted on the vehicle or a signal indicating that the wiper is continuously operating for a predetermined time or more. If it is determined that there is rain, a rain flag is set as one of the risk factors, and if it is determined that there is no rain, the rain flag is cleared. The setting state of the rain flag is sent to the control unit 10.

  The tire wear detection unit 24 determines whether the tire groove depth input by the user using the input unit 11 is 2 mm or less, for example, and determines that the tire groove depth is 2 mm or less. If the tire is worn, the tire wear flag is set as one of the risk factors, and if it is determined that the tire groove depth is greater than 2 mm, the tire is worn. Recognizing that there is no tire wear flag is cleared. The setting state of the tire wear flag is sent to the control unit 10.

  Note that the tire wear detection unit 24 adds an image recognition device 17 as an option for the tire groove depth from the value input from the input unit 11 by the user, and image data obtained from the image recognition device 17. It can also comprise so that it may obtain | require by analyzing.

  The flag determination value setting unit 14 corresponds to a part of the selection means of the present invention, and sets a flag determination value for instructing whether to enable the night driving flag, the outside air temperature flag, the rain flag, and the tire wear flag described above. Set. The flag determination value is provided corresponding to each of the night travel flag, the outside air temperature flag, the rain flag, and the tire wear flag. The flag determination value set by the flag determination value setting unit 14 is sent to the control unit 10.

  The data storage unit 15 stores map data and dangerous part data. Map data is basically composed of a set of nodes corresponding to intersections and road links corresponding to roads connecting two intersections (nodes), for map display or route calculation to the destination. Used.

Hazardous area data includes the following data.
(1) Data indicating a place where the road surface is more slippery than usual due to weather conditions such as rain or outside temperature, such as a manhole, a grating, a bridge, etc.
(2) Data indicating a location where the risk of overlooking the risk factor during night driving increases, such as a narrow road or a road with many obstacles. The traffic information for each time zone can be obtained from, for example, VICS (Vehicle Information and Communication System) and is not included in the data referred to here.
(3) Data indicating a portion where there is a risk of slipping when the grip force is reduced, for example, a corner where there are many accidents, since the grip force is lower than usual and the corner is easily slipped when the tire is worn.

  The map data and the dangerous part data stored in the data storage unit 15 are read out by the control unit 10.

  The display unit 16 displays, for example, a map around the host vehicle, a route to the destination, and other various messages according to the display data sent from the control unit 10.

  Next, details of the control unit 10 will be described. The control unit 10 includes a use route determination unit 31 and a guide route calculation unit 32.

  The use route determination unit 31 includes a flag determination value storage unit 41. The flag determination value storage unit 41 corresponds to another part of the selection unit of the present invention and stores the flag determination value sent from the flag determination value setting unit 14. The use route determination unit 31 compares the flag determination value stored in the flag determination value setting unit 14 with the night travel flag, the outside air temperature flag, the rain flag, and the tire wear flag sent from the risk factor determination unit 13. Thus, it is determined whether to use the normal route or the avoidance route. The determination result of the use route determination unit 31 is sent to the guide route calculation unit 32.

  The guide route calculation unit 32 includes a normal route calculation unit 51 and an avoidance route calculation unit 52. The normal route calculation unit 51 is sent from the input unit 11 from the starting point indicated by the operation data sent from the input unit 11 or the current position shown by the own vehicle position data sent from the positioning unit 12. A recommended route to the destination indicated by the operation data is calculated based on the map data read from the data storage unit 15. Data representing the recommended route calculated by the normal route calculation unit 51 is sent to the display unit 16.

  The avoidance route calculation unit 52 is sent from the input unit 11 from the starting point indicated by the operation data sent from the input unit 11 or the current position shown by the own vehicle position data sent from the positioning unit 12. A recommended route that avoids the dangerous spot to the destination indicated by the operation data is calculated based on the map data and the dangerous spot data read from the data storage unit 15. Data representing the recommended route calculated by the avoidance route calculation unit 52 is sent to the display unit 16.

  Next, the operation of the dangerous point avoidance assistance device according to Embodiment 1 of the present invention configured as described above is illustrated with a focus on route guidance start processing for starting route guidance for guiding the user to the destination. This will be described with reference to the flowchart shown in FIG. The flag determination value is set in advance in the flag determination value storage unit 41 using the flag determination value setting unit 14, and the destination is set in the guidance route calculation unit 32 using the input unit 11. It shall be.

  When the route guidance start process is started by an instruction from the input unit 11, it is first checked whether or not the risk factor determination mode is ON (step ST11). That is, the use route determination unit 31 determines whether or not at least one of the night driving flag, the outside air temperature flag, the rain flag, and the tire wear flag sent from the risk factor determination unit 13 is set (set to “1”). Investigate. If it is determined in step ST11 that the risk factor determination mode is not ON, the sequence proceeds to step ST14.

  On the other hand, if it is determined in step ST11 that the risk factor determination mode is ON, it is then checked whether a risk factor flag is set (step ST12). That is, the use route determination unit 31 is at least one of flag setting values (values corresponding to a night driving flag, an outside air temperature flag, a rain flag, and a tire wear flag representing risk factors) stored in the flag determination value storage unit 41. Check whether one is set.

  If it is determined in this step ST12 that the risk factor flag is not raised, the sequence proceeds to step ST14. In step ST14, normal route guidance is performed. That is, the normal route calculation unit 51 reads from the data storage unit 15 the recommended route from the current position indicated by the vehicle position data sent from the positioning unit 12 to the destination input from the input unit 11. Calculate based on map data. Data representing the recommended route calculated by the normal route calculation unit 51 is sent to the display unit 16. As a result, the normal guidance route that does not avoid the dangerous part is displayed on the display unit 16, and the route guidance is started. Thus, the route guidance start process ends.

  If it is determined in step ST12 that the risk factor flag is set, avoidance route guidance is performed (step ST13). That is, the avoidance route calculation unit 52 reads the recommended route from the current position indicated by the own vehicle position data sent from the positioning unit 12 to the destination input from the input unit 11 from the data storage unit 15. Calculated based on map data and hazardous location data. Data representing the recommended route calculated by the avoidance route calculation unit 52 is sent to the display unit 16. Thereby, the guidance route which avoided the dangerous part is displayed on the display part 16, and route guidance is started. Thus, the route guidance start process ends.

  As described above, according to the dangerous point avoidance assistance device according to the first embodiment of the present invention, the normal route or the avoidance route depending on whether there is a risk of risk factors such as rain, outside air temperature, time zone, and tire wear. Can be provided to the user, so that even if an unexpected situation occurs, it is possible to assist in avoiding a dangerous spot.

It is a block diagram which shows the structure of the dangerous location avoidance assistance apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the dangerous location avoidance assistance apparatus which concerns on Embodiment 1 of this invention centering on a route guidance start process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Control part, 11 Input part, 12 Positioning part, 13 Risk factor judgment part, 14 Flag judgment value setting part (selection means), 15 Data storage part, 16 Display part, 17 Image recognition apparatus, 21 Night detection part, 22 Outside Temperature detection unit, 23 raindrop detection unit, 24 tire wear detection unit, 31 use route determination unit, 32 guide route calculation unit, 41 flag determination value storage unit (selection means), 51 normal route calculation unit, 52 avoidance route calculation unit.

Claims (3)

A data storage unit for storing map data and dangerous point data representing the dangerous point;
A positioning unit that measures the current position;
An input unit for inputting a destination;
A risk factor determination unit that determines whether there is a risk factor risk,
A use route determination unit that determines whether to use a normal route or an avoidance route based on the presence or absence of the risk of the risk factor determined by the risk factor determination unit;
When the use route determination unit determines that the normal route should be used, the data storage unit displays a recommended route from the current position measured by the positioning unit to the destination input by the input unit. A normal route calculator that calculates based on the map data read from
When the use route determination unit determines that an avoidance route should be used, a recommended route that avoids a dangerous point from the current position measured by the positioning unit to the destination input by the input unit An avoidance route calculation unit that calculates based on the map data and the dangerous point data read from the data storage unit ,
The risk factor determination unit uses at least one of a time zone or tire wear as a risk factor, and determines that there is a danger when the time zone or the tire is worn around the danger spot. Location avoidance support device. The risk factor according to claim 1, wherein the risk factor determination unit determines whether there is a risk by combining any one of rain and outside temperature as a risk factor in addition to time zone or tire wear. Location avoidance support device. A selection means for selecting a risk factor to be used for determining whether to use a normal route or an avoidance route from among a plurality of risk factors whose presence or absence is determined by the risk factor determination unit,
The use route determination unit determines whether to use the normal route or the avoidance route based on the risk factor selected by the selection means among the risk factors determined by the risk factor determination unit. The dangerous place avoidance assisting device according to claim 1 or 2, characterized in that it is determined whether or not a crack has occurred.

Images