KR20070103149A - Safety distance preservation system and method between vehicles - Google Patents

Abstract

A system and method for maintaining a safety distance between vehicles is provided to determine a reference safety distance between vehicles according to various driving conditions and to guide it to a driver, and to maintain the safety distance between vehicles automatically. A system for maintaining a safety distance between vehicles includes a driving condition input portion(10) for detecting conditions about the road, weather and tire; a distance between vehicles sensing portion(20); a vehicle speed sensing portion(30); a look-up table(40) for storing a data about a reference distance between vehicles by steps according to the driving conditions and the vehicle speed; a microcomputer(50) for analyzing signals inputted from the driving condition input portion and vehicle speed sensing portion, reading a reference distance between vehicles from the look-up table and comparison-determining the reference distance with the actual distance inputted from the distance between vehicles sensing portion to output a control signal corresponding to the determination; a warning portion(60) for guiding a safety distance and generating an alarm; and a speed control portion(70) for controlling a vehicle speed by control of the microcomputer.

Description

Safety distance preservation system and method between vehicles

1 is a block diagram showing a schematic configuration of a system according to an embodiment of the present invention.

2 is a flow chart showing the operating flow according to an embodiment of the present invention.

<Code Description of Main Parts of Drawing>

10: operating condition input unit 11: road detection unit

12: excellent detection unit 13: tire air pressure detection unit

20: inter-vehicle distance detection unit 30: vehicle speed detection unit

40: lookup table 50: micom

60: alarm driving unit 70: speed control unit

The present invention relates to a system for maintaining a safety distance between vehicles, and in particular, to accurately calculate a guide safety distance to be maintained between front and rear vehicles according to various vehicle operating conditions such as road conditions, weather conditions, tire air pressure conditions, etc. The present invention relates to a safety distance maintenance system and method for maintaining a safety distance between vehicles by comparing and analyzing the reference distance between vehicles and the actual distance between vehicles.

In general, while driving a vehicle, it is necessary to maintain a proper safety distance between the vehicle in front and the vehicle behind, for example, due to the sudden factors caused to the vehicle in front of the vehicle in front of the vehicle in front of the vehicle ahead of speed. If a sudden braking condition or accident occurs, it is difficult to avoid the risk of multiple collision accidents.

In particular, when driving on roads with high speed limits or downhill roads, such as highways and automobile roads, when operating in bad weather conditions such as snow and rain, and when tire air pressure is too high or too low Since the braking distance is longer, it is important to secure a safety distance between vehicles.

However, in the past, there was no way to know exactly how far the driver should maintain the safety distance in the various driving situations described above, and even if the driver knew the safety distance between cars, the vehicle driver was completely dependent on the driver's visual judgment. In case of overworking or inadvertent driving, it was impossible to maintain a proper distance between vehicles.

Meanwhile, in order to solve the above problems, the distance between the front and rear vehicles is measured by using a predetermined sensor, and when the measured distance between the vehicles is smaller than the reference value, the driver is warned and the vehicle speed is automatically limited to the distance between the vehicles. An inter-vehicle safety distance maintenance device was designed to maintain the safety distance.

However, the conventional vehicle-to-vehicle safety distance maintaining device changes vehicle's condition from time to time while the vehicle is in operation, and has no effect on vehicle braking force, for example, the state of roads, weather conditions, and tire pneumatic conditions. It is possible to secure an accurate vehicle-to-vehicle safety distance corresponding to the above-mentioned vehicle driving conditions because the vehicle-to-vehicle safety distance reference value is arbitrarily set without considering it, or the vehicle-to-vehicle safety distance reference value is set in consideration of the current driving speed. There was a problem in that a collision accident occurred even though the safety distance maintaining device between the vehicles was installed.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to accurately calculate the reference safety distance to be maintained between the front and rear vehicles according to various vehicle operating conditions, such as road conditions, weather conditions, tire air pressure conditions, etc. The present invention provides a system and method for inter-vehicle distance information which provides a guide to a vehicle and at the same time compares and analyzes the reference distance between vehicles and the actual distance between vehicles to automatically maintain a safety distance between vehicles.

The system of the present invention for achieving the above object is a driving condition input unit for detecting the current road conditions, weather conditions, tire air pressure conditions and outputs a plurality of detection signals corresponding to the microcomputer and the distance between the front vehicle Inter-vehicle distance detection unit for measuring, Vehicle speed detection unit for detecting the current vehicle speed, Look-up table for storing the reference distance data between vehicles according to the road and weather conditions, tire air pressure status and vehicle speed, The reference distance between the vehicles is read from the look-up table by analyzing a plurality of detection signals input from the driving condition input unit and the vehicle speed detecting unit, and the actual distance between the vehicles input from the inter-vehicle distance detecting unit and the reference distance between the vehicles are compared. A microcomputer for determining and outputting a control signal corresponding to the determination result, and controlling the microcomputer And alarm driver for guiding to the safety distance, and the alarm and the preceding vehicle to be kept current by the driver, characterized by the speed control portion yirueojim for adjusting the current vehicle speed under the control of the microcomputer.

The method of the present invention for achieving the above object is a safety distance maintenance system between the vehicle consisting of a driving condition input unit, a vehicle distance detecting unit, a vehicle speed detecting unit, a look-up table, a microcomputer, an alarm driver and a speed control unit. The first step in which the system is initialized when the vehicle is started and the operating power is applied, the second step of detecting the road condition, the weather condition, and the tire air pressure condition that the driving condition input unit is currently driving, and the inter-vehicle distance detection unit And a third step in which the vehicle speed detecting unit detects a current vehicle speed and a distance between the vehicle in front of the vehicle, and the microcomputer analyzes a plurality of detection signals inputted from the driving condition input unit and the vehicle speed detecting unit to reference the vehicle from the lookup table. A fourth step of reading the distance, and the microcomputer calculates the actual distance between the vehicles input from the inter-vehicle distance detecting unit and the reference distance between the vehicles; The fifth step of the intersection determination and the determination result in the fifth step, if the actual distance between the vehicle is shorter than the reference distance between the vehicle, the microcomputer controls the alarm driver to control the safety distance with the vehicle ahead And a seventh step of providing a guide and an alarm, and a seventh step of limiting the vehicle speed until the actual distance between the current vehicles is greater than or equal to the reference distance between the vehicles by controlling the speed controller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown on different drawings.

1 is a block diagram showing a schematic configuration of an inter-vehicle safety distance maintaining system according to an embodiment of the present invention, the apparatus of the present invention is a driving condition input unit 10, the inter-vehicle distance detection unit 20, vehicle speed detection The unit 30 includes a lookup table 40, a microcomputer 50, an alarm driver 60, and a speed controller 70.

The driving condition input unit 10 detects and responds to vehicle operating conditions, such as a state of a road currently being driven, a weather condition, a tire pneumatic condition, etc., which have a significant effect on the vehicle braking force as the state is changed frequently during vehicle operation. By outputting a plurality of detection signals to the microcomputer 50, more specifically, whether the current vehicle is driving on a flat surface or uphill or downhill using a gyroscope sensor that detects the degree of road inclination of the road and outputs a predetermined electrical signal. Rain detection unit 11 for detecting whether the road is running, rain detection unit for detecting the degree of rain and output a predetermined electrical signal rain rain detection unit for detecting whether the current rain or the degree of rain 12 and other for detecting a degree of internal air pressure of the tire and outputting a predetermined electrical signal. Air pressure detected by the sensor comprises a tire air pressure sensor 13 for sensing whether the LE the tire air pressure of the vehicle is currently traveling if appropriate level or cap or full.

The inter-vehicle distance detecting unit 20 is for detecting the distance to the vehicle in front of the vehicle, and is mounted on the front of the vehicle and emits infrared rays for detecting the distance to the vehicle in front of the vehicle, and is reflected back to the vehicle in front of the vehicle. It consists of a light receiving unit for receiving infrared light, and outputs a corresponding detection signal to the microcomputer 50.

The vehicle speed detecting unit 30 detects the speed of a vehicle currently driving by using a speed sensor and outputs a predetermined electrical signal to the microcomputer 50.

The lookup table 40 collides with the front vehicle even during sudden braking in consideration of vehicle operating conditions that affect the vehicle braking force, that is, the state of roads and rain conditions, the tire air pressure state, and the current vehicle speed. The reference distance data that can be prevented is classified and registered in multiple stages, and when the actual distance between vehicles is shorter than the reference distance data, an alarm control routine and a vehicle speed control routine to be controlled by the microcomputer 50 are registered. do.

The microcomputer 50 analyzes a plurality of detection signals input from the driving condition input unit 10 and the vehicle speed detecting unit 30 to read a reference distance between vehicles from the lookup table 40, and the inter-vehicle distance detecting unit. Comparing and determining the actual distance between the vehicle and the reference distance between the vehicle input from the 20, and outputs a control signal corresponding to the determination result.

The alarm driver 60 issues a safety distance guidance and an alarm with the front vehicle to be maintained by the driver under the control of the microcomputer 50.

The speed adjusting unit 70 preferably includes driving means (not shown) for controlling a brake, an accelerator, a gear shift, a fuel injection pump, and the like, and controls the driving means by the control of the microcomputer 50. The control will automatically adjust the current vehicle speed.

When described in detail with reference to Figure 2 the operating flow of the present invention configured as described above.

First, when the vehicle is started and the driving is started, the system according to the present invention receives the operating power from the vehicle power supply, and the system is turned on and initialized (S11), and the driving condition input unit 10 is currently running on the road and weather conditions. In addition, the tire air pressure state is detected (S12) and the inter-vehicle distance detecting unit 20 and the vehicle speed detecting unit 30 detect the current vehicle speed and the distance between the vehicle in front of the vehicle.

Subsequently, the microcomputer 50 analyzes a plurality of detection signals input from the driving condition input unit 10 and the vehicle speed detecting unit 30 to read a reference distance between vehicles from the lookup table 40 (S14). The microcomputer 50 compares the actual distance between the vehicles input from the inter-vehicle distance detecting unit 20 and the reference distance between the vehicles.

As a result of the determination in step S15, if the actual distance between the vehicles is shorter than the reference distance between the vehicles, the microcomputer 50 controls the alarm driver 60 to inform the driver of the safety distance with the front vehicle to be currently maintained. And an alarm (S16), and at the same time, the microcomputer 50 controls the speed controller 70 to limit the vehicle speed until the actual distance between vehicles is greater than or equal to the reference distance between the vehicles. )

After the step S17, it is determined whether the system according to the present invention is turned off (S18), and the process (S12 to S18) is fed back to the step S12 until the system according to the present invention is turned off. Will be repeated.

What has been described above is only one embodiment for implementing a safety distance maintenance system between vehicles according to the present invention, various substitutions, modifications, and changes are possible within the scope without departing from the spirit of the present invention described above It is not limited to an example and an accompanying drawing.

As described above, the present invention accurately calculates a reference safety distance to be maintained between front and rear vehicles according to various vehicle operating conditions such as road conditions, weather conditions, tire air pressure conditions, etc., and guides the driver to the reference distance between vehicles. By comparatively analyzing the actual distance and automatically maintaining the safety distance between vehicles, it is possible to prevent any accidents that may occur in advance.

Claims (4)

A driving condition input unit 10 for detecting a road state, a weather condition, and a tire air pressure state currently being driven and outputting a plurality of detection signals corresponding to the microcomputer 50; Inter-vehicle distance detecting unit 20 for measuring the distance to the vehicle ahead, A vehicle speed detection unit 30 for detecting a vehicle speed currently being driven; A lookup table 40 for storing reference distance data between vehicles according to road conditions and weather conditions, tire air pressure conditions and vehicle speeds; The reference distance between the vehicles is read from the look-up table 40 by analyzing a plurality of detection signals input from the driving condition input unit 10 and the vehicle speed detecting unit 30, and inputted from the inter-vehicle distance detecting unit 20. A microcomputer 50 which compares the actual distance between the vehicles and the reference distance between the vehicles, and outputs a control signal corresponding to the determination result; An alarm driver 60 for providing a safety distance guidance and an alarm with a front vehicle to be maintained at present by the control of the microcomputer 50; Safety distance maintenance system between the vehicle, characterized in that consisting of a speed control unit 70 for adjusting the current vehicle speed by the control of the microcomputer (50). The method of claim 1, The driving condition input unit 10 uses a gyroscope sensor that detects the degree of road inclination of a road and outputs a predetermined electrical signal, and a road for detecting whether the current vehicle is driving on a flat surface or driving uphill or downhill. The detection unit 11, A rain detection unit 12 for detecting whether the current rains and the degree of rain using a rain sensor that detects the degree of rain and outputs a predetermined electrical signal; The tire air pressure sensing unit 13 for detecting whether the tire air pressure of the vehicle currently being driven is appropriate level, or lacking or overflowing by using a tire air pressure sensor that detects the degree of internal air pressure of the tire and outputs a predetermined electric signal. Safety distance maintenance system between the vehicle, characterized in that comprising a. The method of claim 1, The inter-vehicle distance detecting unit 20 is mounted to a front end of the vehicle, and comprises a light emitting unit for emitting infrared rays for detecting a distance to the front vehicle, and a light receiving unit for receiving infrared rays reflected back to the front vehicle. Safety distance maintenance system. Driving condition input unit 10, inter-vehicle distance detecting unit 20, vehicle speed detecting unit 30, lookup table 40, microcomputer 50, alarm driving unit 60, speed adjusting unit 70 In the safety distance maintenance system between vehicles consisting of, A first step in which the system is initialized when the vehicle is started and operating power is applied; A second step of detecting, by the driving condition input unit 10, a road condition, a weather condition, and a tire air pressure condition currently being driven; A third step of detecting, by the inter-vehicle distance detecting unit 20 and the vehicle speed detecting unit 30, a distance between the current vehicle speed and the front vehicle; A fourth step of the microcomputer 50 reading a reference distance between vehicles from the lookup table 40 by analyzing a plurality of detection signals input from the driving condition input unit 10 and the vehicle speed detecting unit 30; A fifth step in which the microcomputer 50 compares the actual distance between the vehicles input from the inter-vehicle distance detecting unit 20 and the reference distance between the vehicles; As a result of the determination in the fifth step, if the actual distance between the vehicles is shorter than the reference distance between the vehicles, the microcomputer 50 controls the alarm driver 60 to guide the safety distance with the vehicle ahead of the vehicle to be currently maintained and The sixth step of alerting, And a seventh step of limiting the vehicle speed until the microcomputer 50 controls the speed control unit 70 so that the actual distance between vehicles is equal to or greater than a reference distance between vehicles. Maintenance method.

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