KR200469656Y1 - Appartus for anti-collision for vehicle - Google Patents

Abstract

A collision avoidance device for a vehicle is provided, the radar sensor unit for measuring a distance to another vehicle located in front of the vehicle based on a GPS device for calculating speed data and direction data of the vehicle, the speed data, and the direction data, and the speed data; On the basis of the direction data, the power supply unit for supplying the power required for the radar sensor to radiate the radar by the radar sensor unit to another vehicle, the power supply unit, the distance between the vehicle measured from the radar sensor unit and the other vehicle and the pre-stored safety Comparing the distance, and if the distance between the vehicle and the other vehicle is less than the safety distance for each speed includes a collision prevention unit for outputting a warning message.

Description

Anti-collision device for vehicle {APPARTUS FOR ANTI-COLLISION FOR VEHICLE}

The present invention relates to a vehicle collision avoidance device.

In recent years, as the collision accident of the vehicle has rapidly increased, there are a lot of cases of outputting a safety distance securing warning sound to the user so as to connect the speedometer and the radar sensor inside the vehicle or to secure the safety distance according to the vehicle speed by using a vision sensor using a camera. It is a trend.

At this time, the safety distance secure warning sound is implemented by a method of measuring the relative distance with the front vehicle by using a sensor unit installed in the vehicle. In this regard, Korean Patent Laid-Open Publication No. 10-2012-0107660 (2012.10.4 publication), which is a related art, uses a sensor unit to measure a relative distance and a relative speed with a vehicle ahead and deliver a message about securing a safety distance. Is disclosed.

However, when the speedometer inside the vehicle is output in connection with the radar sensor and outputs a warning signal for securing a safety distance, the installation process is complicated because the wiring of the vehicle must be connected to the radar sensor during the installation of the radar sensor. In addition, the malfunction rate of the radar sensor may be increased and may act as a threat to the driver's safety.

One embodiment of the present invention, using a GPS and a step motor can be installed independently without the need of interworking with the vehicle's internal system, and for a vehicle that can output the distance to the vehicle in front of the straight road and curve distance It is an object of the present invention to provide an anti-collision device. However, the technical problem to be achieved by the present embodiment is not limited to the technical problem as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the vehicle collision avoidance device according to an embodiment of the present invention, based on the GPS device, the speed data and the direction data for calculating the speed data and the direction data of the vehicle, Radar sensor unit for measuring the distance from other vehicles located in front of the vehicle, speed data and direction data, the radar sensor unit of the power supply unit for supplying the radar sensor the power needed to radiate the radar to other vehicles, radar And a collision avoidance unit configured to compare the distance between the vehicle measured from the sensor unit and another vehicle and a previously stored safety distance for each speed, and output a warning message when the distance between the vehicle and the other vehicle is less than or equal to the safety distance for each speed.

According to any one of the problem solving means of the present invention described above, even non-experts can be easily installed, and because it is not associated with the system of the vehicle, the malfunction rate of the device can be significantly reduced, and since complicated cameras are not used, complicated image processing You can print a warning message to the user without doing anything.

1 is a block diagram showing a vehicle collision prevention device according to an embodiment of the present invention.
2 is a perspective view and a partially enlarged view illustrating an embodiment in which the vehicle collision avoidance device of FIG. 1 is installed in a vehicle.
3A is a diagram illustrating a circuit diagram and a frequency output according to an embodiment of the radar sensor unit of FIG. 1.
FIG. 3B is a diagram illustrating a circuit diagram and an adaptive delay (Td) characteristic according to an exemplary embodiment of the radar sensor unit of FIG. 1.
4 is a diagram illustrating an embodiment in which the vehicle collision avoidance device of FIG. 1 measures a distance.
5 is a diagram illustrating a control signal of the step motor controller of FIG. 1.

The description of the disclosed technique is merely an example for structural or functional explanation and the scope of the disclosed technology should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the disclosed technology should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the disclosed technology should not be construed as being limited thereby, as it does not mean that a particular embodiment must include all such effects or merely include such effects.

On the other hand, the meaning of the terms described in this specification should be understood as follows.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In the drawings, the same reference numerals are used throughout the specification to refer to the same or like parts.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well. Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise. It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosed technology belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a vehicle collision prevention apparatus according to an embodiment of the present invention, Figure 2 is a perspective view and a partially enlarged view showing an embodiment in which the vehicle collision prevention apparatus of Figure 1 is installed in a vehicle, 3A is a diagram illustrating a circuit diagram and a frequency output according to an embodiment of the radar sensor unit of FIG. 1, and FIG. 3B is a diagram illustrating a circuit diagram and an adaptive delay (Td) characteristic according to an embodiment of the radar sensor unit of FIG. 1. 4 is a diagram illustrating an embodiment in which the vehicle collision avoidance apparatus of FIG. 1 measures a distance, and FIG. 5 is a diagram illustrating a control signal of the step motor controller of FIG. 1.

Referring to FIG. 1, the vehicle collision avoidance device 1 includes a GPS device 100, a radar sensor unit 200, a power supply unit 300, and a collision avoidance unit 400. Here, the vehicle collision avoidance device 1 may further include a step motor 500 and a step motor controller 600. Since the components disclosed in FIG. 1 are merely illustrated for convenience of description, the configuration of the vehicle collision avoidance device 1 of the present application is not limited to those shown in FIG. 1.

The vehicle collision avoidance device 1 is provided to measure a distance from a vehicle positioned in front of the vehicle and to prevent a collision accident with the vehicle positioned in front of the vehicle. To this end, the GPS device 100 calculates speed data and direction data of the vehicle. Here, the GPS device 100 may be at least one of a navigation system including a GPS, a GPS terminal, and a smart terminal. For example, the GPS device 100 may be used by any terminal having a GPS function. In addition, the GPS device 100 may be embedded in the substrate of the radar sensor unit 200.

The radar sensor unit 200 measures a distance to another vehicle located in front of the vehicle based on the speed data and the direction data. The radar sensor of the radar sensor unit 200 uses a transmission pulse generator driven by a chirp radar sensor or a pulse repetition frequency oscillator that adjusts the transmission power by adjusting the gain of the transmission amplifier. The pulse radar sensor may propagate the generated pulse.

Here, the chirp radar sensor and the pulse radar sensor will be described with reference to FIGS. 3A and 3B. Referring to FIG. 3A, there is shown a circuit diagram of (a) the chirp radar sensor and (b) a graph according to the input frequency and the output frequency of the chirp radar sensor. Referring to (a), the chirp radar sensor includes a chirp transmitter (TX AMP), a transmit amplifier (TX AMP), a circulator, an antenna, an amplifier (AMP), a spectrum analyzer, and an SPI ( Serial Peripheral Interface). At this time, the chirp radar sensor may adjust the transmission power through gain control of the transmission amplifier through the SPI.

Referring to (b), it shows the frequency change of the chirp signal of the chirp transmitter over time. A is a transmission signal of the chirp radar sensor, B is a reception signal of the chirp radar sensor. In this case, the maximum distance that the chirp radar sensor can measure may be determined by Equation 1 below.

Here, Tb is a time delay between the transmission signal and the reception signal of the chirp radar sensor, R is the maximum distance that the chirp radar sensor can measure, and C is the speed of light. At this time, since C is constant at the speed of light, the maximum distance R that the chirp radar sensor can measure may be determined according to the time delay T _b .

Referring to FIG. 3B, there is shown a circuit diagram of (a) the pulse radar sensor and (b) a graph according to the time delay function of the pulse radar sensor. Referring to (a), the pulse radar sensor includes a pulse repetition frequency oscillator (PRF Osc), a transmit pulse generator, a RF switch, a transmit amplifier (TX AMP), and a SPI ( It may include a serial peripheral interface, a transmit antenna (TX Ant), a receive antenna (RX Ant), an intermediate frequency (intermediate frequency), an RF switch, a receive pulse generator, and an adaptive delay. . In this case, the pulse repetition period frequency oscillator may be 10MHz, the gain control of the transmission amplifier through the SPI, it is possible to adjust the transmission power.

The pulse radar sensor propagates a pulse having a width of P_width into space through a transmission antenna through a transmission pulse generator driven by a pulse repetition period frequency oscillator. On the other hand, the propagated pulse may be reflected by a target located in front, for example, a vehicle located in front, and the reflected signal may be received through a receiving antenna and synchronized with an adaptive delay T _d . In this case, the pulse radar sensor may measure the distance by calculating T _d , which is a delay time of the transmitted and received signal.

Referring to (b), the function of the adaptive delay Td is shown graphically. The Y axis represents the voltage of the adaptive delay Td for adjusting the delay time. In this case, the adaptive delay Td may adjust the delay time of the reception pulse generator by the sweep voltage. As a result, the distance can be measured in synchronization with the reflection pulse of the target of the transmission signal. The maximum distance the pulse radar sensor can measure may be adjustable by setting the sweep voltage in a manner that adjusts the sweep voltage. For example, assume that the maximum measurable distance when the sweep voltage of the adaptive delay Td is 4.5V is 150m and the maximum measurable distance when the sweep voltage is 0V is 0m. At this time, if the sweep voltage of the adaptive delay Td is changed to a value other than 4.5V, the maximum measurable distance of the pulse radar sensor is also adjusted based on this. Thus, the pulse radar sensor can adjust the maximum distance measurable by controlling the sweep voltage.

Referring back to FIG. 1, the power supply unit 300 may supply power required for the radar sensor of the radar sensor unit 200 to radiate the radar to another vehicle based on the speed data and the direction data. In this case, the power required for the radar sensor to radiate the radar to another vehicle is the same as described above and will be omitted.

The collision avoidance unit 400 compares the distance between the vehicle measured by the radar sensor unit 200 and another vehicle and a previously stored safety distance for each speed, and warns when the distance between the vehicle and the other vehicle is less than or equal to the safety distance for each speed. You can print a message.

At this time, the princess distance means the distance the vehicle travels while the driver presses the brake while finding a danger and the brake actually starts to operate. For example, it may be a distance for which the user has traveled for about 1 second at a speed typically when the user tries to light the brake. In addition, the braking distance means the slipped distance from the time when the brake is activated to the stop. For example, in the case of a passenger car, the coefficient of friction when sliding may be 0.8. In addition, the radar sensor unit 200 may adjust the maximum distance at which the radar is emitted by adjusting the delay time T _b based on the data in Table 1.

The configuration of the collision avoidance unit 400 will be described with reference to FIG. 2. In this case, the collision avoidance unit 400 may include at least one light emitting device 410 and a speaker 430. Here, the at least one light emitting device 410 may be mounted on the rear surface of the panel 700 provided with the radar sensor unit 200 including the radar sensor. In addition, the at least one light emitting device 410 may be turned on when the distance between the vehicle and another vehicle is less than or equal to the safety distance for each speed. In this case, the at least one light emitting device 410 may be provided to display that the safety distance is not visually secured to the user.

The speaker 430 may be mounted on the rear surface of the panel 700 provided with the radar sensor unit 200 including the radar sensor. In this case, the speaker 430 may output a warning message as a sound when the distance between the vehicle and another vehicle is less than the safety distance for each speed. At this time, the warning message may be a voice message such as "secure a safe distance", "slow down", "collision", "dangerous", or may be a message indicating the distance to the vehicle ahead. For example, the radar sensor unit 200 measures the distance to the vehicle in front of the vehicle in real time, and based on the information received from the radar sensor unit 200, "the distance to the front vehicle is 20m. Secure a safety distance." , You might generate the message "The distance to the front vehicle is 50m. If you keep your current speed, it will crash after 10 seconds." Since distance is the product of speed and time, time can be calculated simply based on distance and speed. In addition, the warning message may be an alarm sound, which may also output a louder alarm sound as the distance to the vehicle ahead, and increase the octave of the alarm sound to alert the user.

1 again, if the GPS device 100 is a device including a display screen, the collision avoidance unit 400 may output a warning message on the display screen if the distance between the vehicle and another vehicle is less than or equal to the safety distance for each speed. It may be. In this case, when the GPS device 100 includes both a display and a speaker, such as a smart phone, a smart pad, a tablet PC, and the like, a warning message may be output to the user using both the display and the speaker of the smart terminal.

The step motor 500 may detect a direction corresponding to the front of the vehicle based on the direction data. In this case, the step motor 500 may adjust the angle of the radar sensor unit 200 so that the radar radiated from the radar sensor unit 200 is radiated in a direction corresponding to the front of the vehicle. The step motor 500 may adjust the angle of the radar sensor unit 200 based on at least one of the GPS angle, the GPS angle change, and the GPS angle change rate included in the direction data as shown in Table 2 below.

For example, when there is a GPS angle change (vehicle direction change) and a GPS angle change rate (vehicle direction change rate), the rotation angle of the step motor 500 may change, and the GPS angle change and the GPS angle change rate are zero at the same time. In this case, since the left and right angles of the stepper motor 500 are zero, the radar sensor unit 200 may face the front side.

An embodiment in which the step motor 500 is rotated will be described with reference to FIGS. 2, 4, and 5. Referring to FIG. 2, the step motor 500 may be connected to the panel 700 to which the radar sensor unit 200 is attached. In this case, when the step motor 500 is driven, the radar sensor unit 200 may rotate left and right. The step motor 510 may be fixed to the front of the vehicle by the fixing unit 510.

Referring to FIG. 4, (a) shows that the vehicle and the other vehicle are positioned on a straight line distance, and the radar A is radiated forward. However, when a vehicle different from the vehicle is positioned on a curved distance as shown in (b), when the radar B is radiated at a straight distance, the radar B does not reach the vehicle in front of the vehicle. Therefore, by rotating the radar sensor 200 in the front vehicle direction using the step motor 500, the radar (C) can be radiated in the front vehicle direction. In addition, when the GPS device 100 is provided with navigation, the vehicle collision avoidance device 1 can predict the curved road from the map information received from the navigation in advance, and thus drive the step motor 500 in accordance with the mechanism of Table 2. By doing so, the radar radiation direction of the radar sensor unit 200 can be adjusted.

2, the step motor controller 600 may adjust the rotation direction and the rotation speed of the step motor 500. The control signal of the step motor controller 600 may be the same as that of FIG. 5, which will be described with reference to FIG. 5. The step motor controller 600 may control the rotation direction of the step motor 500 using the DIR signal, and may adjust the rotation speed of the step motor 500 using the CLK signal.

An anti-collision device for a vehicle according to an embodiment of the present invention may be implemented by combining a device having a GPS or navigation function. The radar sensor may measure the distance between the vehicle ahead and the user's vehicle, output a safety distance according to the vehicle speed to the user through a warning sound, and automatically adjust the transmission power of the radar sensor. In addition, the collision avoidance apparatus for a vehicle according to an embodiment of the present invention may secure a safety distance between a user's vehicle and a front vehicle by adjusting the radar radial direction with a stepper even in a curved road where curvature exists.

It will be understood by those of ordinary skill in the art that the foregoing description of the present invention has been presented for purposes of illustration and that those skilled in the art will readily understand that various changes in form and details may be made without departing from the spirit and scope of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalents thereof are included in the scope of the present invention Should be interpreted.

Claims (7)

A GPS device for calculating speed data and direction data of the vehicle;
A radar sensor unit measuring a distance from another vehicle located in front of the vehicle based on the speed data and the direction data;
A power supply unit for supplying power required for the radar sensor of the radar sensor unit to radiate the radar to the other vehicle based on the speed data and the direction data;
A collision prevention unit for comparing a distance between the vehicle and another vehicle measured from the radar sensor unit with a previously stored safety distance for each speed, and outputting a warning message when the distance between the vehicle and the other vehicle is less than or equal to the safety distance for each speed;
The direction corresponding to the front of the vehicle is detected based on the GPS angle, the GPS angle change, and the GPS angle change rate included in the direction data, and the radar radiated from the radar sensor unit radiates in a direction corresponding to the front of the vehicle. Step motor for adjusting the angle of the radar sensor unit so as to;
Step motor control unit for adjusting the rotation direction and rotation speed of the step motor
Lt; / RTI >
The GPS device adjusts the update distance of the GPS based on the princess distance, the braking distance, and the inter-vehicle stability distance of the vehicle corresponding to the speed data,
The radar sensor unit adjusts the maximum distance at which the radar is radiated based on the princess distance, the braking distance, and the inter-vehicle stability distance of the vehicle corresponding to the speed data,
The power supply unit adjusts the distance the radar is radiated based on a sweep voltage output from the power supply unit,
And a plurality of radar sensors included in the radar sensor unit are arranged in an array on a panel in the front direction of the vehicle.
delete delete The method of claim 1,
The GPS device, at least one of a navigation, GPS terminal, smart terminal, including a GPS, a vehicle collision prevention device.
The method of claim 1,
The collision prevention unit,
At least one light emitting device mounted on a rear surface of the panel provided with the radar sensor and turned on when a distance between the vehicle and another vehicle is less than or equal to a safety distance for each speed; And
Speaker mounted on the rear of the panel provided with the radar sensor, and outputs the warning message as a sound when the distance between the vehicle and the other vehicle is less than the safety distance for each speed
To include, the vehicle collision prevention device.
The method of claim 1,
If the GPS device is a device including a display screen,
The collision preventing unit outputs the warning message to the display screen when the distance between the vehicle and another vehicle is less than or equal to the safety distance for each speed.
The method of claim 1,
The radar sensor uses a transmit pulse generator driven by a chirp radar sensor or a pulse repetition frequency oscillator that adjusts a transmission power by adjusting a gain of a transmission amplifier. An anti-collision device for a vehicle, which is a pulse radar sensor to propagate.

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