JP2007011454A - Speed-warning device, control method therefor, and control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an accident and ease traffic congestion by warning against excess or drop in the speed, on a long upward slope or a downward slope. <P>SOLUTION: A comparison part 46 compares a reference speed, which is correlated with long downward slope information or long upward slope information, with a current speed of own vehicle and determines whether the speed of own vehicle attains to a certain range of the reference speed, when own vehicle reaches a positional range of slope information (the long downward slope information and the long upward slope information) read out from a map ROM 3. When the speed of own vehicle is determined to attain a certain range of the reference speed, as the result of this comparison, a reporting part 48 reports to the user to the effect, with a voice message or the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for preventing an accident and alleviating a traffic jam by warning about an excess or a decrease in speed on a long downhill or uphill.

  In recent years, with the progress of information processing technology such as GPS, navigation systems have rapidly spread. The navigation system displays the position of the vehicle that is sequentially identified using GPS or the like on the surrounding map, searches for a route to the destination specified by the cursor operation or facility search on the screen, and follows the route. It outputs guidance guidance such as the direction of travel.

Conventionally, in such a navigation system, it is possible to detect speed, acceleration, and deceleration using vehicle speed pulses and acceleration sensors in a vehicle electronic control system and navigation sensor group. Techniques for announcing excess and decline have been proposed. For example, when the speed reaches a preset speed set by the user, there are an example in which a speaker informs by voice such as “10 km / H over” (for example, Patent Document 1), and an example in which a decrease in vehicle speed contrary to the driver's intention is informed by a speaker or the like ( For example, Patent Document 2).
JP-A-6-231392 JP 11-2222050

  However, in normal places such as ordinary roads on flat ground, there are many changes in road conditions, speed, and nearby objects, and overspeeding and slowing down are easy to notice. There was an annoying problem. Rather, unintentional speed increases and decreases frequently occur on long downhills and long uphills on expressways, but there has been no warning technique that takes this fact into consideration. For this reason, there has been a long-awaited desire to prevent accidents caused by excessive speed, which tends to occur on long downhills, and to reduce traffic congestion due to speed reduction, which tends to occur on long uphills.

  The present invention solves the problems of the prior art as described above, and its purpose is to prevent accidents and alleviate traffic congestion by alerting excessive speeds and drops on long downhills and uphills. is there.

  In order to solve the above-described problems, an aspect of the present invention (claims 1, 3, 5) includes a navigation sensor group, an information storage unit and an output unit, and a control unit that performs information processing including control of each unit. And a speed warning device (a control method and a control program thereof) comprising: map information for route search or map display; and a long downhill and a long uphill where a predetermined gradient or more on a road continues for a certain distance or more. The position range including the starting point and the slope information including the reference speed are recorded in advance in a predetermined map information storage means, and an output from the navigation sensor group or an output from the electronic control system of the vehicle is recorded. Using the vehicle speed detection means (process) for detecting the vehicle speed at which the vehicle is traveling and the output from the navigation sensor group, the vehicle position is displayed on the map. Detect where it is When the vehicle position approaches the position range of the slope information read from the map information storage means and vehicle position detection means (processing), the vehicle speed is determined by comparing the reference speed with the vehicle speed. Comparison judgment means (process) for judging whether or not the reference speed has reached a certain range, and if it is determined that the vehicle speed has reached the certain range of the reference speed as a result of the comparison, the user is informed accordingly. The control unit realizes notification means (processing) for notifying the output unit by the output unit.

  In this way, information on long downhills and long uphills is stored in advance along with map information, and when approaching each location, overspeed is detected on long downhills and speed reduction is detected on long uphills. By notifying them, it is possible to prevent accidents and reduce traffic congestion when it is truly necessary.

  According to another aspect of the present invention (Claims 2, 4 and 6), in each of the above aspects, the slope information includes the position range delimited by a start point and an end point with respect to a long downhill or a long uphill, and an overspeed. A reference speed for determination or a speed reduction determination is associated, and the comparison determination means (process) compares the position range from the start point to the end point by comparing the position range from the start point to the end point. The informing means (process) is controlled to notify the user when the vehicle speed exceeds or falls below a predetermined width above the reference speed associated with.

  In this way, by simple condition judgment based on the position range divided by the start point and end point and the reference speed associated with it, accident prevention and congestion reduction can be efficiently realized with a simple configuration and a small processing load. Become.

  As described above, according to the present invention, it is possible to prevent an accident and alleviate a traffic jam by warning of an excess or a decrease in speed on a long downhill or uphill.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. Note that the assumptions common to the explanation in the background art and the problems are not repeated.

[1. Constitution〕
The present embodiment relates to a speed warning device (hereinafter referred to as “this device”), and may be integrated with the navigation system or separate from the navigation system, and can be grasped as a control method and control program for this device.

  First, the configuration of this apparatus is shown in FIG. Among these, the interface unit 2 is a part that receives information from an electronic control system (such as an ECU) and a navigation sensor group (such as GPS and gyroscope) (not shown) in the vehicle, and receives, for example, a vehicle speed signal 1 that is a speed pulse. The navigation control CPU 4 (also simply referred to as “CPU 4”) is a control unit that performs information processing including control of each unit, and is a processing unit that realizes functional operations of the units 42 to 48 described later illustrated in FIG.

  The map ROM 3 (map information storage means) is a storage area secured on an information storage unit (HDD, DVD-ROM, etc.) (not shown). Map information for route search or map display is stored in the map ROM 3. , The road information including the position range including the starting point and the reference speed for at least one of a long downhill and a long uphill where a predetermined gradient or more continues over a certain distance on the road ("long downhill information", "long uphill information respectively" ”) Is recorded in advance.

  In addition, this apparatus is an information output unit that is composed of a voice synthesis IC (5), a voice control IC (DSP, electronic volume, etc.) 6, a power amplifier 7, and a voice output device for voice output. A vehicle speaker 8 is provided, and a display IC (9) and a display (10) such as a liquid crystal panel are provided for display output.

[2. Effect)
In the CPU 4 of the apparatus as described above, the own vehicle speed detection unit 42 (own vehicle speed detection means) uses the output of the vehicle speed signal 1 and the like received by the interface unit 2 and the like from the navigation sensor group and the electronic control system, The vehicle speed at which the vehicle is traveling is detected (vehicle speed detection process). The own vehicle position detection unit 44 (own vehicle position detection means) detects where the own vehicle position is on the map by map matching using the output from the navigation sensor group such as GPS (own vehicle position). Position detection processing).

  Then, the comparison unit 46 (comparison judgment means), when the vehicle position approaches the position range of the slope information (long downhill information and long uphill information) read from the map ROM 3, the long downhill information or long By comparing the reference speed associated with the uphill information with the current vehicle speed, it is determined whether or not the vehicle speed has reached a certain range of the reference speed (comparison determination process). As a result of this comparison, when it is determined that the host vehicle speed has reached a certain range of the reference speed, the notification unit 48 (notification unit) notifies the user to that effect by the output unit (notification process).

  More specifically, the slope information recorded in the map ROM 3 includes, for a long downhill or long uphill, the position range delimited by a start point and an end point, and a reference speed for speed excess judgment or speed reduction judgment. The comparison unit 46 compares the reference speed associated with the position range from the start point to the end point while the vehicle is traveling in the position range from the start point to the end point. When it exceeds or falls below, the notification unit 48 is controlled to notify the user to that effect.

  As described above, information on long downhills and long uphills is stored in advance along with map information, and when approaching each location, overspeed is detected on long downhills, and speed reduction is detected on long uphills. By informing, it is possible to prevent accidents and reduce traffic congestion when it is truly necessary.

  In addition, as described above, a simple condition judgment based on the position range divided by the start point and the end point and the reference speed associated therewith can efficiently prevent accidents and reduce traffic congestion with a simple configuration and a small processing load. It becomes feasible.

[3. (Example of flowchart)
The procedure of the above process is illustrated in the flowchart of FIG. That is, in the running state (step 10), if there is slope information at the current position (step 20), the following processing is performed depending on whether it is downhill (steps 30, 40) or uphill (steps 30, 140). Do.

  First, although not essential, when the vehicle speed is within a certain range of the reference speed set in the slope information (steps 50 and 150), it is desirable to output a warning message accordingly (steps 60 and 160). ). For example, when the starting point of a downhill is less than 10 km / H, for example, when there is room to reach the legal maximum speed limit (step 50), a message such as “Become a long downhill ahead. Step 60). On the other hand, if the starting point of the uphill is, for example, 10 km / H or less below the legal maximum speed limit (step 150), a message such as “Take a long uphill ahead. ).

  After that, the vehicle speed calculated sequentially from the speed signal is over-computed (step 70) and the speed drop is judged (step 170). If the predetermined speed is exceeded on a long downhill (step 80), the “speed limit 10 km The user is warned that the speed has been exceeded (step 90).

  On the other hand, in the case of a predetermined speed reduction on a long uphill (for example, the vehicle speed at the starting point or 10 km / H down from the legal maximum speed limit) (step 180), “Please note that the speed is decreasing. Is output (step 190). The amount of deceleration to be issued can be determined arbitrarily based on the reference speed and the vehicle speed at the starting point, such as the rate and width of the speed reduction. For example, the speed is reduced by 5 km / H in 5 seconds. The same applies to overspeed.

  Furthermore, when a state where there is a high possibility of overspeed or slowdown (for example, acceleration amount or deceleration amount within a predetermined number of seconds, sudden approach to the speed limit, etc.) is detected even if the warning is not reached, “the speed is likely to be exceeded. If the forecast guidance such as “It seems that the speed is likely to drop significantly” is given, it is more effective to prevent excessive speed and accidents on long downhills, and to relieve traffic congestion by slowing down on long uphills.

[4. Other embodiments]
In addition, this invention is not limited to the said embodiment, The thing illustrated below and other embodiment other than that are included. For example, any element such as the configuration, numerical value, and processing procedure shown in each figure is merely an example for explanation, and can be changed as appropriate. A warning by a display, a buzzer sound, a beep sound, etc. is possible as well.

The functional block diagram which shows the structure of embodiment of this invention. The flowchart which shows the process sequence in embodiment of this invention.

Explanation of symbols

1 ... Vehicle speed signal 2 ... Interface unit 3 ... Map ROM
4. Navigation control CPU
42 ... Vehicle speed detection unit 44 ... Vehicle position detection unit 46 ... Comparison unit 48 ... Notification unit 5 ... Speech synthesis IC
6 ... Voice control IC
7 ... Power amplifier 8 ... Speaker 9 ... Drawing IC
10 ... Display

Claims (6)

A speed warning device including a navigation sensor group, an information storage unit and an output unit, and a control unit that performs information processing including control of each unit,
Map information for route search or map display, and a slope range information including a reference range and a position range including a starting point for at least one of a long downhill and a long uphill where a predetermined gradient or more on a road continues for a certain distance or more. Pre-recorded map information storage means;
A vehicle speed detection means for detecting a vehicle speed of how fast the vehicle is traveling, using an output from the navigation sensor group or an output from an electronic control system of the vehicle;
Vehicle position detection means for detecting where the vehicle position is on the map using the output from the navigation sensor group;
When the vehicle position approaches the position range of the slope information read from the map information storage means, the vehicle speed reaches a certain range of the reference speed by comparing the reference speed and the vehicle speed. Comparison judgment means for judging whether or not,
As a result of the comparison, when it is determined that the vehicle speed has reached a certain range of the reference speed, a notification means for notifying the user of the fact by the output unit;
The speed warning device, wherein the control unit realizes the above. The slope information is obtained by associating the position range divided by a start point and an end point with a long downhill or a long uphill, and a reference speed for speed excess judgment or speed reduction judgment,
The comparison determination means is configured to compare the reference speed associated with the position range to a reference range associated with the position range from the start point to the end point, while the vehicle speed exceeds or exceeds a predetermined width. 2. The speed warning device according to claim 1, wherein the notification unit is controlled so as to notify the user of the fact in the event of a failure. A speed warning device control method comprising a navigation sensor group, an information storage unit and an output unit, and a control unit that performs information processing including control of each unit,
Map information for route search or map display, and a slope range information including a reference range and a position range including a starting point for at least one of a long downhill and a long uphill where a predetermined gradient or more on a road continues for a certain distance or more. Pre-recorded in a predetermined map information storage means using the storage unit,
Using the output from the navigation sensor group or the output from the electronic control system of the vehicle, the own vehicle speed detection process for detecting the own vehicle speed at which the own vehicle is traveling,
A vehicle position detection process for detecting where the vehicle position is on the map using the output from the navigation sensor group;
When the vehicle position approaches the position range of the slope information read from the map information storage means, the vehicle speed reaches a certain range of the reference speed by comparing the reference speed and the vehicle speed. A comparison determination process for determining whether or not
As a result of the comparison, when it is determined that the vehicle speed has reached a certain range of the reference speed, a notification process for notifying the user of the fact by the output unit;
A control method for a speed warning device, wherein the control unit executes The slope information is obtained by associating the position range divided by a start point and an end point with a long downhill or a long uphill, and a reference speed for speed excess judgment or speed reduction judgment,
In the comparison determination process, the own vehicle speed exceeds the reference speed associated with the position range by more than a predetermined width, or exceeds or falls below the reference speed associated with the position range while the vehicle is traveling in the position range from the start point to the end point. The method of controlling a speed warning device according to claim 3, wherein the notification process is controlled so as to notify the user of the fact in the event of a failure. A control program for a speed warning device including a navigation sensor group, an information storage unit and an output unit, and a control unit that performs information processing including control of each unit,
Map information for route search or map display, and a slope range information including a reference range and a position range including a starting point for at least one of a long downhill and a long uphill where a predetermined gradient or more on a road continues for a certain distance or more. Pre-recorded in a predetermined map information storage means using the storage unit,
Using the output from the navigation sensor group or the output from the electronic control system of the vehicle, the own vehicle speed detection process for detecting the own vehicle speed at which the own vehicle is traveling,
A vehicle position detection process for detecting where the vehicle position is on the map using the output from the navigation sensor group;
When the vehicle position approaches the position range of the slope information read from the map information storage means, the vehicle speed reaches a certain range of the reference speed by comparing the reference speed and the vehicle speed. A comparison determination process for determining whether or not
As a result of the comparison, when it is determined that the vehicle speed has reached a certain range of the reference speed, a notification process for notifying the user of the fact by the output unit;
Is a control program for a speed warning device. The slope information is obtained by associating the position range divided by a start point and an end point with a long downhill or a long uphill, and a reference speed for speed excess judgment or speed reduction judgment,
In the comparison determination process, the own vehicle speed exceeds the reference speed associated with the position range by more than a predetermined width, or exceeds or falls below the reference speed associated with the position range while the vehicle is traveling in the position range from the start point to the end point. The speed warning device control program according to claim 5, wherein the notification process is controlled so as to notify the user of the fact in the event of a failure.

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