Section overspeed warning apparatus and system
View Patent ↗In a section overspeed regulating method of determining whether a vehicle overspeeds on the basis of whether an average speed of the vehicle in a regulation section exceeds a speed limit, the section overspeed warning apparatus and system determine whether the current speed of the vehicle traveling on a regulation section exceeds the speed limit, and warn a driver. Whether the speed of the vehicle traveling on the regulation section exceeds the speed limit of the section is determined depending on a travel distance from a starting position of the regulation section to a current position of the vehicle, a travel time taken for the vehicle to travel by the travel distance, and a remaining distance from the current position of the vehicle to an end position of the regulation section. If it is determined that the current position of the vehicle will exceed the speed limit of the section, overspeed warning messages are output in the form of text, voice, or warning sound. Further, the section overspeed warning apparatus and system recommend the maximum speed, which allows the vehicle not to violate the speed limit of the section at the current position, to a driver as a recommended speed.
1. A section overspeed warning apparatus that warns a driver of the overspeed of a vehicle in an overspeed regulation section having a regulation start position and a regulation end position, the section overspeed warning apparatus comprising:
a distance detecting unit configured to detect a travel distance from the regulation start position to a current position of the vehicle and a remaining distance from the current position of the vehicle to the regulation end position;
a time detecting unit configured to detect a travel time taken for the vehicle to travel from the regulation start position to the current position of the vehicle;
a speed detecting unit configured to detect current speed of the vehicle;
a speed determining unit configured to determine whether the current speed of the vehicle will exceed a speed limit of the overspeed regulation section under the assumption that the vehicle travels to the regulation end position constantly at the current speed, by using the detected travel distance, the remaining distance, the travel time, and the current speed of the vehicle; and
an overspeed information output unit configured to output an overspeed warning message to warn the driver of the overspeed when it is determined that the current speed of the vehicle will exceed the speed limit.
2. The section overspeed warning apparatus according to claim 1 ,
wherein the speed determining unit determines that the current speed of the vehicle will exceed the speed limit if the following expression is satisfied:
V 1≧( S 2 ×V )÷( S 1 +S 2 −T 1 ×V )(where, T 1≦( S 1 +S 2)÷ V ),
wherein V 1 represents the current speed; S 1 represents the detected travel distance; S 2 represents the remaining distance; T 1 represents the travel time; and V represents the speed limit.
3. The section overspeed warning apparatus according to claim 2 ,
wherein the overspeed information output unit informs the driver of a result, which is obtained by calculating a right term of the expression, as a recommended speed.
4. The section overspeed warning apparatus according to claim 3 ,
wherein the overspeed information output unit outputs messages including the recommended speed by using a display screen.
5. The section overspeed warning apparatus according to claim 3 ,
wherein the overspeed information output unit outputs messages including the recommended speed by using voice.
6. The section overspeed warning apparatus according to claim 1 ,
wherein information about the regulation start position, the regulation end position, and the current position of the vehicle is supplied by a navigation device including a GPS receiver.
7. The section overspeed warning apparatus according to claim 6 ,
wherein the speed detecting unit detects the current speed of the vehicle using information that is supplied by the navigation device.
8. The section overspeed warning apparatus according to claim 1 ,
wherein the overspeed information output unit informs the driver of a fact that it is determined that the current speed of the vehicle will exceed the speed limit, by using warning sound.
9. A section overspeed warning system that warns a driver of the overspeed of a vehicle in an overspeed regulation section having a regulation start position and a regulation end position, the section overspeed warning system comprising:
a navigation device configured to supply information about the regulation start position, the regulation end position, and a current position of the vehicle; and
a section overspeed warning device configured to detect whether a current speed of the vehicle will exceed a speed limit of the overspeed regulation section by using the information supplied from the navigation device, and to inform the driver of the detection result,
wherein the section overspeed warning device includes:
an information detecting unit configured to detect a travel distance from the regulation start position to the current position of the vehicle, a remaining distance from the current position of the vehicle to the regulation end position, and a travel time taken for the vehicle to travel from the regulation start position to the current position of the vehicle;
a speed determining unit configured to determine whether the current speed of the vehicle will exceed the speed limit under the assumption that the vehicle travels to the regulation end position constantly at the current speed, by using the detected travel distance, the remaining distance, the travel time, and the current speed of the vehicle; and
an overspeed information output unit configured to output an overspeed warning message to warn the driver of the overspeed when it is determined that the current speed of the vehicle will exceed the speed limit.
10. The section overspeed warning system according to claim 9 ,
wherein the speed determining unit determines that the current speed of the vehicle will exceed the speed limit if the following expression is satisfied:
V 1≧( S 2 ×V )÷( S 1 +S 2 −T 1 ×V )(where, T 1≦( S 1 +S 2)÷ V ),
wherein V 1 represents the current speed; S 1 represents the detected travel distance; S 2 represents the remaining distance; T 1 represents the travel time; and V represents the speed limit.
11. The section overspeed warning system according to claim 10 ,
wherein the overspeed information output unit informs the driver of a result, which is obtained by calculating a right term of the expression, as a recommended speed.
12. The section overspeed warning system according to claim 11 ,
wherein the overspeed information output unit outputs messages including the recommended speed by using a display screen.
13. The section overspeed warning system according to claim 9 ,
wherein the navigation device supplies information about the current speed of the vehicle to the section overspeed warning device.