KR20120053176A - The vehicle's front and rear collision warning devices and collision warning method using the same - Google Patents

Abstract

PURPOSE: A head-on and rear-end collision warning system is provided to divide a vehicle on opposite lane or fixed structure by using algorithm detected in a plurality of collision sensing units when traveling on curved road, thereby preventing indiscreet generation of warning signals. CONSTITUTION: A head-on and rear-end collision warning system comprises collision detecting units(20,20a,20b), a computation module(40), a controller(60), an alarm generating unit(80). The collision detecting units are installed a front side and a rear side of a vehicle, and detects object approaching the front and rear sides. The computation module calculates relative distance and velocity with the objects by receiving signals detected through the collision detecting units. The controller decides the collision risk with the objects by receiving value calculated through the computation module. The alarm generating unit outputs alarm signal by auralizing or visualizing the risk of a collision by receiving the signals of the controller.

Description

Vehicle front and rear collision warning devices and collision warning method using the same}

The present invention is to warn the driver when the vehicle is in danger of collision, and more particularly, when the vehicle is close to the front and rear vehicles or objects to generate a warning signal for the risk of collision to prevent the accident in advance The present invention relates to a front and rear collision warning device and a collision warning method using the same.

Due to the development of automobile technology, the spread of automobiles is popularized, so it is easy to move long distances and make life easier.However, in high-density places like Korea, road traffic conditions worsen and traffic congestion becomes severe. Many road accidents occur due to inexperienced driving and speeding while driving on roads.

In particular, when driving on the road, the novice driver or female driver cannot freely change lanes due to inexperienced driving, resulting in traffic congestion and accident risk due to collision with the other vehicle. Likewise, inexperienced drivers are insensitive to distance and speed when approaching a vehicle or an object in front and rear while driving, and there is always a risk of an accident.

Recently, a vehicle collision warning device has been proposed to prevent a crash of a vehicle as described above, and the vehicle collision warning device may be a collision that may occur in a blind spot where the driver's vision does not reach when driving or changing a driving lane. Alert you in advance of danger.

The vehicle collision warning device detects the presence or absence of a collision possibility using an ultrasonic signal or a laser signal. Referring to FIG. 1, a conventional vehicle collision warning device will be described.

1 is a block diagram illustrating a conventional vehicle collision warning device.

The conventional vehicle collision warning apparatus referring to FIG. 1 includes an obstacle detecting unit 1, a control unit 3, a display unit 5, a warning sound generating unit 7, and a power supply unit 9. .

The obstacle detecting unit 1 is installed at the rear of the vehicle and detects the presence of an obstacle. For example, the obstacle detecting unit 1 may be installed at the rear bumper of the vehicle and may be formed of a conventional ultrasonic sensor or an infrared sensor.

The controller 3 receives the detection signal from the obstacle detecting unit 1 to calculate the distance between the vehicle and the obstacle, and controls the display unit 5 and the warning sound generating unit 7 to be described later based on the calculated distance. In addition, the position of the obstacle or the calculated distance is controlled to be output to the display unit to be described later.

The display unit 5 visually displays the distance between the vehicle and the obstacle and the position of the obstacle. For example, the display unit 5 may be implemented as a conventional liquid crystal display (LCD) panel or a light emitting diode (LED) panel.

The warning sound generating unit 7 voices the distance between the vehicle and the obstacle and the position of the obstacle to the driver, and guides the collision risk when the distance between the vehicle and the obstacle is within a predetermined value.

Conventional vehicle collision warning device as described above was able to alert the driver in advance by detecting the presence of obstacles in the blind spot that the driver's field of vision does not reach or the vehicle approaching the rear when parking, alerting the driver in advance. .

However, the conventional vehicle collision warning device as described above has a problem in that the measurable range of the obstacle detection unit is limited, and thus, most blind spots cannot be detected because the vehicle or obstacles located in the rear and rear are not detected. Obstacle detection unit is installed there was a problem that can not detect the danger and alarm at all in front of the vehicle.

In addition, there is a problem that the risk of collision may occur due to lack of distance recognition with the vehicle in front of the vehicle when driving at night on the highway does not find a vehicle stopped on the shoulder or when the vehicle in front of the fog or rain when the taillight is broken.

In this case, even if an obstacle detector is installed in front of the vehicle, a fixed facility such as a vehicle or guardrail in the opposite lane without a collision risk is detected every day in a curved section of the road, and an indiscriminate alarm signal is generated so that the vehicle is actually applied to the vehicle. There was a hard problem.

The present invention has been made to solve the problems described above, the front and rear collision warning device of the vehicle to detect the risk of collision for most blind spots while driving by improving the measuring range of the sensor for detecting the front and rear of the vehicle And to provide a collision warning method using the same.

In addition, to provide a front and rear collision warning device and an alarm method using the same to prevent indiscriminate alarm signal by classifying fixed facilities such as vehicles or guardrails in the opposite lane without the risk of collision in the curved section of the road. do.

The problem to be solved by the present invention is not limited to the above-mentioned problem, another problem to be solved by the present invention not mentioned here is those skilled in the art from the following description. Will be clearly understood.

In the core technical configuration of the present invention for achieving the object as described above, first, the front and rear collision warning device of the vehicle, the collision detection unit for detecting an object close to the front and rear installed in the front and rear of the vehicle; A calculation module configured to receive a signal sensed through the collision detection unit and calculate a relative distance and a speed of the object; A controller which receives a value calculated by the calculation module and determines a risk of collision with an object proximate to front and rear of the vehicle; And an alarm generation unit for receiving the signal determined by the control unit to visualize or visualize the risk of collision and to display it as an alarm signal, wherein the collision detection unit is installed at a plurality of front and rear bumpers at regular intervals. And separately calculate the individually detected signals through the operation module, and the controller receives the values individually detected and calculated by each collision detection unit, compares each other, and determines a collision risk through a predetermined algorithm. It is done.

According to a preferred embodiment, the collision detection unit is inserted into a predetermined space formed in the bumper of the vehicle, a pan-tilt driving device is provided in the space in the bumper is characterized in that the collision detection unit rotates up and down or left and right.

Next, the front and rear collision warning method of the vehicle, the collision detection step for detecting a plurality of collision objects that operate separately, the adjacent objects located in front and rear of the vehicle; A calculation step of receiving a signal detected in the collision detection step and calculating a relative distance and a speed with respect to the object; A comparison determination step of receiving a value detected and calculated individually by each collision detection unit, comparing each other, and determining a collision risk through a predetermined algorithm; And generating an alarm signal by audible or visualizing a risk of collision by receiving a signal in the comparison determination step, wherein the comparison determination step comes from the opposite lane when driving on a curved road. Curve driving determination step for determining the collision risk by classifying the vehicle or fixed facilities; wherein, in the curve driving determination step, the distance measurement value of all the collision detection unit by comparing the signals sensed individually by the plurality of collision detection unit If it is variable at a constant ratio, it is determined that there is no risk of collision, and thus it is characterized in that no alarm signal is generated.

According to a preferred embodiment, the calculating step includes a laser transmission step of transmitting a laser signal to the front and rear of the vehicle, a laser reception step of receiving the laser signal reflected to an object proximate to the front and rear of the vehicle, and transmission and reception of the laser signal And a distance measuring step of calculating a relative distance to the object by comparing the time difference, and a speed measuring step of calculating a relative speed with the object by using the time difference between the transmission and reception of the laser signal and the measured distance. do.

According to the present invention having the above-described configuration and method, a plurality of collision detection units are installed on the front and rear bumpers of the vehicle to improve the front and rear measurement range of the vehicle to detect most blind spots while driving, thereby accurately detecting an alarm occurrence point for a collision risk. There is an advantage to judge.

In addition, by using the measured values and algorithms individually detected by the plurality of collision detection units, it is possible to prevent indiscriminate alarm signals by distinguishing fixed facilities such as vehicles or guardrails in the opposite lane that do not have a risk of collision when driving in a curved section. There is an advantage.

1 is a block diagram illustrating a conventional vehicle collision warning device.
2 is a block diagram illustrating a front and rear collision warning device of a vehicle according to an embodiment of the present invention.
3 is an exemplary view for explaining a measurement range when driving in a straight line according to an exemplary embodiment of the present invention.
4 is an exemplary view for explaining a measurement range when driving a curved section according to an embodiment of the present invention.
5 is an algorithm for explaining a collision risk warning when driving in a straight line according to an embodiment of the present invention.
6 is an algorithm for explaining a collision risk warning when driving in a curved section according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

In addition, it will be apparent to those skilled in the art that the present invention may be practiced without specific matters such as a specific circuit element in the following description.

2 is a block diagram illustrating a front and rear collision warning device of a vehicle according to an embodiment of the present invention.

The front and rear collision warning device of the vehicle of the present invention with reference to FIG. 2 includes a collision detection unit 20, a calculation module 40, a control unit 60, and an alarm generation unit 80.

First, the collision detection unit 20 will be described.

The collision detection unit 20 is installed in the front and rear of the vehicle to detect an object close to the front and rear, a plurality of the front and rear bumpers of the vehicle are installed at a predetermined interval arithmetic module to be described later separately detected signals Transmit to 40.

As described above, the measurement range is improved through the plurality of collision detection units 20, so that most blind spots can be detected during driving, and the time point of occurrence of an alarm for a collision risk can be accurately determined.

In particular, the collision detection unit 20 may be inserted into a predetermined space formed in the bumper of the vehicle, and may be rotated vertically or horizontally by a pan-tilt driving device provided in the space in the bumper. Therefore, in addition to detecting the front and rear of the vehicle, it is possible to detect an object that is close to the front and rear sides.

Here, the collision detection unit 20 is preferably composed of a laser diode for firing a laser and a photosensor for detecting a laser reflected from a nearby object emitted from the laser diode, but is not limited to this, and the other object through the transmission and reception of signals Various transmission / reception sensors capable of measuring the distance to and from may be used.

Next, the operation module 40 will be described.

The calculation module 40 receives a signal sensed through the collision detection unit 20 and calculates a relative distance and speed with respect to the object, together with the collision detection unit 20 or the control unit 60 to be described later. It may consist of one module or be separately separated and mounted inside the vehicle.

Such a calculation module 40 is to separate the signals detected by the collision detection unit 20 separately and transmit the calculated value to the controller to be described later.

Next, the control unit 60 will be described.

The controller 60 determines the risk of collision with an object proximate to the front and rear of the vehicle by receiving a value calculated through the calculation module 40. The controller 60 may be configured as a MCU in which a program for executing a predetermined algorithm is embedded. .

The MCU (Micro Controller Unit) is a non-memory semiconductor (system semiconductor) that controls various characteristics ranging from simple control to special functions, and can perform various functions by porting a program that performs a specific purpose at any time through a computer. Make sure

As described above, the control unit receives the values individually detected and calculated by each collision detection unit 20, compares each other, and determines a collision risk through a predetermined algorithm.

Next, the alarm generating unit 80 will be described.

The alarm generating unit 80 receives the signal determined by the control unit 60 to visualize or visualize the danger of collision and expresses it as an alarm signal, and is installed in the form of a display or a speaker around the driver's seat in the vehicle.

The alarm generating unit 80 may be displayed in conjunction with a navigation screen installed in front of the driver's seat, and when a collision risk is detected during driving, other functions through the display or the speaker are paused and the alarm signal is generated first.

3 is an exemplary diagram for describing a measurement range when driving a straight section according to an exemplary embodiment of the present invention.

Based on the above description, referring to FIG. 3, since a plurality of collision detection units can individually detect a collision risk from a vehicle that is not located in the same lane, that is, a vehicle entering or leaving a lane, the collision risk can be determined. The front and rear collision risk range becomes more accurate and wider.

Referring to FIG. 5 to describe the same embodiment as in FIG. 3, FIG. 5 is an algorithm for describing a collision risk warning when driving a straight section according to an exemplary embodiment of the present invention.

The front and rear collision warning method of the vehicle with reference to FIG. 5 includes a collision detection step, a calculation step, a comparison determination step, and an alarm generation step.

First, the collision detection step will be described.

The collision detection step is a step of detecting a proximity object located in front and rear of the vehicle, a plurality of collision detection unit to operate individually, the plurality of collision detection unit transmits and receives a laser signal to detect whether there is a relative vehicle or a fixed facility within a certain distance Done.

Next, the operation steps will be described.

The calculating step is a step of calculating the relative distance and speed with respect to the object by receiving the signal detected in the collision detection step, calculating the relative distance using the time difference between the transmission and reception of the laser signal, and the relative using the time difference and the calculated distance The speed is calculated.

Herein, the operation step will be described in detail. A laser transmission step of transmitting a laser signal to the front and rear of the vehicle, a laser reception step of receiving the laser signal reflected to an object proximate to the front and rear of the vehicle, and a time difference between the transmission and reception of the laser signal The distance measuring step may be performed by comparing a distance between the object and a speed measuring step of calculating a relative speed with the object by using a time difference between the transmission and reception time of the laser signal.

Next, a comparative judgment step will be described.

The comparison determination step is a step of determining a collision risk through a predetermined algorithm by receiving the values sensed and calculated individually, it is determined whether the collision risk based on the relative speed and relative distance to the adjacent vehicle.

First of all, the collision risk can be determined according to the relative speed of the adjacent vehicle. The speed difference between the vehicle and the adjacent vehicle can be compared through a predetermined algorithm, and if it is determined that the collision risk is determined, an alarm signal can be immediately generated. The alarm signal may be generated by judging together with the collision risk result according to the relative distance to be described later.

Next, the risk of collision can be determined according to the relative distance between the vehicles close to each other. The distance difference between the vehicle and the vehicle close to the vehicle can be compared through a predetermined algorithm, and an alarm signal can be immediately generated when the risk of collision is determined. Alternatively, the alarm signal may be generated by judging together with the result of the collision risk according to the relative speed.

In this case, it will be obvious that the comparison decision step requires a different algorithm for determining a collision risk depending on where the adjacent vehicle is located in front of or behind the vehicle.

Next, the alarm generation step will be described.

The alarm generating step is to express an alarm signal by audible or visualizing a collision risk by receiving a signal in a comparison determination step, and an alarm signal may be differently expressed depending on where the adjacent vehicle is located in front or rear. .

4 is an exemplary diagram for describing a measurement range when driving a curved section according to an exemplary embodiment of the present invention.

Referring to FIG. 6 to describe the same embodiment as in FIG. 4, FIG. 6 is an algorithm for describing a collision risk warning when driving a curved section according to an exemplary embodiment of the present invention.

The algorithm for driving the curved section shown in FIG. 6 is a curve driving determination step that is further included in the above-described comparative determination step. When driving a curved road, the collision risk is determined by classifying vehicles or fixed facilities coming from opposite lanes. do.

That is, in the curve driving determination step, when the distance measurement values of all the collision detection units are varied at a constant ratio by comparing the signals individually detected by the plurality of collision detection units, it is determined that there is no danger of collision so as not to generate an alarm signal.

In addition, when the distance measurement values of all the collision detection units are varied at a constant ratio, when the distance measurement of each collision detection unit becomes impossible in sequence, it is determined that the curved obstacle disappears so as not to generate an alarm signal as described above.

As described above, in the curve driving determination step, it is possible to prevent indiscriminate alarm signals by distinguishing fixed facilities such as vehicles or guardrails in the opposite lane without a collision risk.

Here, in order to apply different algorithms by distinguishing whether the vehicle is driving in a straight line or in a curve, it may be easily determined through a steering angle sensor.

Based on the above description, the algorithm shown in FIG. 6 will be described as follows.

First, if it is determined that the vehicle is curved driving, the first, second, and third collision detection units sequentially transmit and receive laser signals, and measure relative distances to nearby objects according to signal values of the collision detection units.

In addition, it is determined whether the relative distances measured sequentially are varied at a constant rate. At this time, if the distance values sequentially measured by the first, second, and third collision detection units are varied at a constant rate, the road is free of collision risks. If it is judged as a facility, it is fed back to the step of transmitting and receiving the laser signal, and if the measured distance values are not changed at a constant rate, it is reported that there is a possibility of collision risk, and the process goes to the next judgment step of the algorithm.

In the next judging step, it is to judge whether or not to enter the stage of direct collision risk, and it is determined whether the relative distance from one or more collision detection units is close to a predetermined value or less. In this case, when the relative distance value measured by the at least one collision detecting unit approaches a predetermined value or less, it is determined that there is a risk of collision and transmits a signal to generate a warning signal. On the contrary, if the relative distance value measured by the at least one collision detection unit does not approach a predetermined value or less, it is fed back to the step of transmitting / receiving the laser signal after determining that the vehicle has progressed to a straight section through a curved section or has been backward or stopped.

As described above, the present invention not only enables accurate collision warning by further expanding the detection range of the front and rear blind spots when driving in a straight section, but also provides a vehicle or a fixed facility in the opposite lane when driving in a curved section. Accurately identify and prevent indiscriminate alarm signals.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the claims that follow may be better understood. It should be appreciated by those skilled in the art that the above-described concepts and specific embodiments of the present invention can be used immediately as a basis for designing or modifying other shapes for carrying out similar objects to the present invention.

In addition, the above-described embodiment is only one embodiment according to the present invention, and various modifications and changes may be made by those skilled in the art within the scope of the technical idea of the present invention. These various modifications and changes are also within the scope of the technical idea of the present invention, and will be included in the claims of the present invention described below.

1: obstacle detection unit 3: control unit
5: display part 7: warning sound generating part
9: power supply
20: collision detection unit 40: calculation module
60: control unit 80: alarm generating unit

Claims (4)

Collision detection unit is installed in the front and rear of the vehicle for detecting an object close to the front and rear;
A calculation module configured to receive a signal sensed through the collision detection unit and calculate a relative distance and a speed of the object;
A controller which receives a value calculated by the calculation module and determines a risk of collision with an object proximate to the front and rear of the vehicle; And
And an alarm generator for receiving the signal determined by the controller to visualize or visualize the risk of collision and to display the alarm signal as an alarm signal.
The collision detection unit is installed in the plurality of front and rear bumpers at regular intervals to calculate the separately detected signals through the calculation module, respectively,
Wherein the control unit receives a value detected and calculated separately from each of the collision detection unit, the front and rear collision warning device of the vehicle, characterized in that to determine the collision risk through a predetermined algorithm. The method of claim 1,
The collision detection unit is inserted into a predetermined space formed in the bumper of the vehicle,
A pan-tilt driving device is provided in a space in the bumper to rotate the collision detection unit vertically or horizontally. A collision detection step of detecting a proximity object located in front and rear of the vehicle, the plurality of collision detection units operating individually;
A calculation step of receiving a signal detected in the collision detection step and calculating a relative distance and a speed with respect to the object;
A comparison determination step of receiving a value detected and calculated individually by each collision detection unit, comparing each other, and determining a collision risk through a predetermined algorithm; And
Alarm generation step of expressing the alarm signal by hearing or visualizing the collision risk by receiving the signal in the comparison determination step;
The comparing and determining step may further include a curve driving determination step of determining a collision risk by classifying a vehicle or a fixed facility facing in the opposite lane when driving on a curved road.
In the curve driving determination step,
When the distance measurement values of all the collision detection units are varied at a constant ratio by comparing the signals sensed individually by a plurality of collision detection units, it is determined that there is no risk of collision, and thus does not generate an alarm signal. . The method of claim 3, wherein
The operation step,
A laser transmission step of transmitting a laser signal to the front and rear of the vehicle,
A laser receiving step of receiving the laser signal reflected from an object proximate to the front and rear of the vehicle;
A distance measuring step of calculating a relative distance from the object by comparing the transmission / reception time difference of the laser signal;
And a speed measurement step of calculating a relative speed with the object by using the time difference between the transmission and reception of the laser signal and the measured distance.

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