KR19980043951A - Route guidance device according to vehicle speed and method - Google Patents

Abstract

The present invention relates to a route guidance device according to the vehicle speed, vehicle speed detection means for detecting a vehicle speed; Driving direction detecting means for detecting a driving direction of the vehicle; Traveling distance sensing means for sensing a traveling distance of the vehicle; Determines the location of the vehicle according to the driving direction and the mileage of the vehicle, sets a point in time to inform the driver of the entry according to the detected vehicle speed when the vehicle needs to enter an arbitrary point, and provides a driving signal at that point. Control means for outputting; It comprises a guide means for notifying the driver whether or not to enter a certain point in accordance with the drive signal output from the control means, in the navigation system, by varying the guide point in accordance with the vehicle traveling speed to guide the driving information, Even if it is fast, the driver can provide information on the best route and improve system reliability without leaving the point.

Description

Route guidance device according to vehicle speed and method

The present invention relates to a route guidance apparatus according to a vehicle speed and a method thereof, and more particularly, to a route guide apparatus according to a vehicle speed for varying a time point for guiding a route according to the vehicle speed in a navigation system. It is about a method.

In the recent automotive industry, when a driver sits down and looks at a liquid crystal panel mounted on a dashboard, a research is conducted on a system that displays the current driving position along with a map on the liquid crystal panel so that the best way to get to the destination is known. It's going on.

This is the study of the car navigation system, which is the culmination of cutting-edge electronic technology. The car navigation system, which is like a friendly road guide to the driver, makes it easy for drivers to be new to the road or are unfamiliar with geography. You can make local driveway more comfortable.

Nowadays, the spread of the car navigation system as described above is rapidly spreading, and the automobile industry is paying attention to the high-tech items of the 21st century. It is still in its early stages of deployment, but is expected to reach 20% in 10 years.

The biggest attraction of the car navigation system is that the driver can enjoy driving on the road safely. Each company's system includes maps of the whole area, and you can zoom in or out on a map of the area from one hundredths of a million to up to tens of thousands at the touch of a button.

In addition, the map contains not only roads, but also displays of service points, rest areas, and various public facilities on the highways, so that you can exit immediately if you enter the road at night.

There are two types of vehicle navigation systems, a sensor method and a GPS method using a satellite.

The sensor method is a method of detecting the current position of the car by detecting the direction of the vehicle, the driving distance, etc. with the sensor, the sensor method has the disadvantage that an error occurs in the unit of 100 meters when driving long distance.

The GPS (Grobal Positioning System) method has been developed by the US Department of Defense for nearly 20 years for military purposes, and is a position measuring system using a satellite that is currently in a practical stage.

Satellites orbiting the earth transmit a 1575.42 MHz radio wave that modulates the data necessary for position measurement by frequency spreading. The receiving side receives radio waves from a plurality of satellites (three satellites for 25-dimensional position measurement and four satellites for three-dimensional position measurement), and the current position can be measured by calculating the time it takes for the radio wave to arrive. Do.

At present, the number of satellites is 16 and two-dimensional positioning is possible for 22 hours a day. However, upon completion of the GPS system, a total of 24 satellites will be launched, including three spares, and the world will be able to make three-dimensional position measurements 24 hours a day.

As described above, a car navigation system using GPS uses a GPS receiver installed in a vehicle to receive a radio wave from a satellite and then locates the current self and displays it on a map, thereby allowing the driver to reach the destination safely. Make sure

The above-described GPS receivers are highly dependent on the accuracy of the program of the microcomputer, and the contents of the GPS receiver are all kept secret and are not disclosed.

As the car navigation system using GPS is gradually put into practical use, the automotive industry is rushing to develop related products.

When the driver selects a destination to which the driver wants to go, the navigation system uses a voice to guide the left and right turns at the shortest route and intersection from the current starting point to the destination, or an interchange (jin, access road) on a highway or an urban expressway. have.

For example, when the current vehicle is traveling at a speed of 60 km / h, the moving distance of the vehicle per second is about 15.6 m / sec, and the conventional voice guidance apparatus has a direction of travel at the next intersection at a distance of 200 m ahead of the intersection. Will perform a voice guidance that is ○○○.

At this time, as shown in the accompanying FIG. 3, the time required for the voice guidance apparatus to guide the corresponding point by voice and then the driver determines the driving direction at the corresponding point includes a system delay time (0.8 to 1.5 seconds) and the system. The time required to prepare for the start of the voice guidance after confirming the point (1 second), the time of the voice guidance (5 seconds), the time that the driver recognizes and then confirms (3), and after preparing the operation All of the time (3) is consumed, which takes about 14 seconds.

In the above, the current moving distance per second of the vehicle is 15.6 m / sec, and the time required for the driver to determine the driving direction at the corresponding point after voice guidance of the corresponding point is about 14 seconds, so that the driver turns at the intersection. In order to do so, guidance must be given to the intersection at least 218.4 meters ahead.

However, in the conventional voice guidance apparatus, since the voice guidance point is fixed, when the vehicle speed is high, the turning area is excessively over the instant the voice guidance is given to the designated intersection, so that the user cannot return to the optimum route or must return. Discomfort is issued, and the disadvantage that the reliability of the driver's navigation system is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages, and in a navigation system, by guiding driving information by varying a guide point according to a vehicle driving speed, the driver provides information about an optimal route and An object of the present invention is to provide a voice guidance apparatus and a method according to a vehicle speed for improving reliability.

A configuration of the present invention for achieving the above object, the vehicle speed detecting means for detecting a vehicle speed; Driving direction detecting means for detecting a driving direction of the vehicle; Traveling distance sensing means for sensing a traveling distance of the vehicle; Determines the location of the vehicle according to the driving direction and the mileage of the vehicle, sets a time point for notifying the driver of the entry according to the detected vehicle speed when the vehicle needs to enter an arbitrary point, and generates a driving signal at that time. Control means for outputting; It includes a guide means for informing the driver whether or not to enter any point in accordance with the drive signal output from the control means.

Another aspect of the present invention for achieving the above object comprises the steps of identifying the position of the vehicle in accordance with the driving direction and the traveling distance of the vehicle; Detecting a vehicle speed when the vehicle must enter an arbitrary point; Setting a time point for notifying whether any point is entered according to the detected vehicle speed; And informing the driver of whether any point is entered at the set time point.

1 is a block diagram illustrating a route guidance apparatus according to a vehicle speed according to an embodiment of the present invention;

2 is an operation flowchart of a route guidance method according to a vehicle speed according to an embodiment of the present invention;

3 is a state diagram illustrating a time required for driving in a corresponding direction after voice guidance at a conventional intersection.

With the above configuration, the most preferred embodiment which can be easily carried out by those skilled in the art with reference to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a route guidance apparatus according to a vehicle speed according to an embodiment of the present invention. As shown in FIG. 1, the configuration of the voice guidance apparatus according to vehicle speed according to an embodiment of the present invention is a driver. A position selection switch S1 for selecting a destination and a current position to which the user wants to go, a vehicle speed detection unit 10, a driving direction detection unit 20 for detecting a driving direction of the vehicle, and a driving for detecting a driving distance of the vehicle Determine the current position of the vehicle according to the signal applied to the distance detecting unit 30, the position selection switch (S1), and the output terminal of the sensing unit 10 to 30, the vehicle speed when passing through the intersection According to the microcomputer 40 and the control signal output from the microcomputer 40 by setting the voice guidance time according to the control signal output from the microcomputer 40 to guide whether the current vehicle entering the intersection It comprises a voice guidance unit 50.

The driving direction detection unit 20 according to the embodiment of the present invention is made of a geomagnetic sensor, but is not limited thereto.

The operation of the route guidance device according to the vehicle speed according to the embodiment of the present invention by the above configuration is as follows.

When the vehicle is started and the power is supplied, the microcomputer 40 initializes all the use variables and calculates an optimal path for the current position of the vehicle and a destination to be traveled according to the driver's selection operation (S110 to S120).

When the driver selects the destination to which the position selection switch S1 is to be operated and the current position of the user, the microcomputer 40 drives an information display device (not shown) to determine the optimum route from the current position to the destination to be moved. Display.

As the vehicle moves to the corresponding destination, the driving direction detecting unit 20 detects the driving direction of the vehicle and outputs a corresponding signal, and the driving distance detecting unit 30 measures a driving amount of the vehicle and corresponds to the signal. Outputs

The microcomputer 40 sets the position of the vehicle as a reference point at the time of departure according to a map matching method, and then outputs a signal output from the driving direction detecting unit 20 and the traveling distance detecting unit 30. According to the cumulative calculation of the moving angle and the moving distance of the vehicle, the current vehicle position is estimated and the road map data and the estimated position recorded in the external memory (CD ROM, etc.) not shown are inquired and the current vehicle position is within a certain reference value. To forcibly correct the position on the road (S130 ~ S140).

When it is necessary to enter an intersection or an interchange while determining the location of the vehicle according to the map matching method as described above, the microcomputer 40 measures the speed of the current vehicle according to the signal output from the vehicle speed detecting unit 10. (S150 ~ S160).

The vehicle speed detecting unit 10 generally includes a vehicle speed sensor used in a vehicle.

The microcomputer 40 measures the speed of the current vehicle, and then reads the guide time set according to the measured vehicle speed.

In an embodiment of the present invention, the guide time according to the detected vehicle speed is divided into three steps.

In other words, when the detected vehicle speed is less than or equal to the first set speed (25 km / h), voice guidance is performed before the first set distance (about 100 m) (S170 to S180), and the detected vehicle speed is greater than or equal to the first set speed and If the speed is less than 2 set speed (50km / h), voice guidance is performed before the second set distance (about 200m) (S190 ~ S200), the detected vehicle speed is more than the second set speed and the third set speed (80km / h) In the following case, the voice guidance is performed before the third set distance 300m (S210 to S220).

For example, if the vehicle travels at 25 km / h, the moving distance of the vehicle per second is about 6.944 m / sec, and the time required for the driver to determine the driving direction at the corresponding point after voice guidance of the intersection entry. Since this is 14 seconds, if the vehicle is traveling at 25 km / sec, the driver must be notified of the intersection at least 97.22 m (14 x 6.944).

In addition, if the vehicle is traveling at 50 km / h, the traveling distance of the vehicle per second is 13.889 m / sec, and at least 194.44 m (14 × 13.889) must be notified to the driver of the intersection, and the vehicle is driven at 80 km / h. The vehicle must inform the driver of the intersection at least 311.11m (14 × 22.22) before the vehicle travels 22.22m / sec.

Therefore, when the vehicle speed is 25 km / sec or less, the microcomputer 40 drives the voice guide unit 50m before entering the intersection and sends a message that the direction of travel at the next intersection is ○○○, and the vehicle speed is 25km. If more than / h and less than 50km, the message is sent 200m before entering the intersection, if the vehicle speed is more than 50km / h and less than 80km / h, the message is sent 300m before entering the intersection.

In the present invention, although the set vehicle speed and the set distance are set in accordance with the above-described method, it is possible to further subdivide the guidance viewpoint region according to the vehicle speed without being limited to the above.

As described above, according to the embodiment of the present invention, the navigation system, by guiding the driving information by varying the guide point in accordance with the vehicle traveling speed, even if the vehicle speed is fast, without departing from the corresponding point for the optimal route from the driver It is possible to provide a voice guidance apparatus and method according to vehicle speed having an effect of providing information and improving the reliability of the system.

Claims (6)

Vehicle speed detecting means for detecting a vehicle speed; Driving direction detecting means for detecting a driving direction of the vehicle; Traveling distance sensing means for sensing a traveling distance of the vehicle; Determines the location of the vehicle according to the driving direction and the mileage of the vehicle, sets a point in time to inform the driver of the entry according to the detected vehicle speed when the vehicle needs to enter an arbitrary point, and provides a driving signal at that point. Control means for outputting; And a guide means for notifying a driver of whether an arbitrary point is entered according to a drive signal output from the control means. The method of claim 1, wherein the control means, If the detected vehicle speed is less than or equal to the first set speed, the vehicle is guided before the first set distance to enter an arbitrary point; The guidance is performed before the set distance, and if the detected vehicle speed is greater than or equal to the second set speed and less than or equal to the third set speed, the guide means drives the guide means to guide the set point before the third set distance to enter an arbitrary point. Route guidance device. The method of claim 1, wherein the control means, Route guidance apparatus according to the vehicle speed for controlling the above guide operation is performed before the vehicle enters the intersection or interchange. Determining a location of the vehicle according to the driving direction and the driving distance of the vehicle; Detecting a vehicle speed when the vehicle must enter an arbitrary point; Setting a time point for notifying whether any point is entered according to the detected vehicle speed; A method of guiding a route according to a vehicle speed, the method comprising informing a driver of whether an arbitrary point is entered at a set time point. According to claim 4, In the step of setting the guide point in accordance with the vehicle speed, When the detected vehicle speed is less than or equal to the first set speed, the vehicle is guided before the first set distance to enter an arbitrary point. When the detected vehicle speed is greater than or equal to the first set speed and less than or equal to the second set speed, the second vehicle enters an arbitrary point. Guides before the set distance, and if the detected vehicle speed is greater than or equal to the second set speed and less than or equal to the third set speed, the route according to the vehicle speed that sets the point of time so as to perform the guide before the third set distance to enter an arbitrary point. Guide way. 5. The route guidance method according to claim 4, wherein the guidance operation is performed before the vehicle enters an intersection or an interchange.