KR19990005650A - Rapid curve alarm device and method of vehicle navigation system - Google Patents

Abstract

The present invention relates to a sudden curve alarm device and method of the vehicle navigation system, in particular, CCTV (400) for outputting an image signal; Input the coordinate data and the time data output from the second GPS receiver 100 to calculate the current position of the vehicle, input the rotation speed data output from the second vehicle speed sensor 200, the moving distance of the vehicle To calculate the rotation angle of the vehicle by inputting the direction detection data of the vehicle output from the second gyroscope 300, and reading the map data stored in the second CD-ROM 700. A CPU 800 for outputting a voice control signal according to a routing signal of the input unit 600, and comparing a rotation angle of a road appearing in front of the vehicle while driving with a reference rotation angle relative to a vehicle speed; A second LCD display panel 1200 which displays map data and a current position of the vehicle; And a voice output unit 1300 for outputting a route guidance and an alarm sound of the vehicle as a voice that can be heard by the user. The present invention recognizes a sharp curve in advance and informs the driver, By recognizing the sharp curve in advance can reduce the speed, there is an effect that can prevent a safety accident.

Description

Rapid curve alarm device and method of vehicle navigation system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a global positioning system (hereinafter referred to as GPS), and more particularly, to processing image signals applied through closed-circuit televisions (hereinafter referred to as CCTV). By extracting the linearity and comparing the extracted linearity of the road with the stored numerical road map, it recognizes the sharp curve considering the driving speed and generates a sharp curve alert using GPS that can generate an alarm indication and an alarm sound to the driver. An apparatus and method are provided.

As is well known, GPS orbits the earth twice a day at an altitude of 20,183 km, and a total of 18 GPS satellites on each of six orbits transmit coordinate signals for the current position and signals for the time when the coordinate signals are transmitted. Dogs (24 in total, including spare satellites for each orbit) are arranged at equal intervals, and the GPS receiver can be used to detect and process the position of the GPS receiver by receiving and processing signals transmitted from the GPS satellites. The device is a device that detects the position of a person by detecting a signal transmitted from three or more GPS satellites by using a GPS receiver comprising a GPS antenna and a GPS receiver circuit. GPS satellite signal required).

As shown in FIGS. 1 and 2, a conventional vehicle legal apparatus using GPS includes a GPS antenna and a GPS receiving circuit, and includes a first GPS receiver 10 receiving coordinate data and visual data of a GPS satellite transmitted from a GPS satellite. )Wow; A first gyroscope 20 for detecting a moving direction of the vehicle; A first vehicle speed sensor 30 for detecting the rotation speed of the wheel; A first CD-ROM (COMPACT DISK READ ONLY MEMORY) 40 in which map data is stored; Connected to the signal output terminal of the first GPS receiver 10, the first gyroscope 20, the first vehicle speed sensor 30, and the first CD-ROM 40, and connected to the first CD-ROM 40. When the stored map data is read out and the GPS satellite signal can be detected through the first GPS receiver 10, the coordinate data and the visual data received through the first GPS receiver 10 are calculated. When the position of the vehicle is calculated and the signal of the GPS satellites cannot be detected through the first GPS receiver 10, the vehicle is applied from the first gyroscope 20 and the first vehicle speed sensor 30. A microcomputer 50 for analyzing the traveling direction signal and the rotational speed signal of the wheel, calculating the position of the vehicle, and outputting a display control signal to display the calculated position of the vehicle; First Crystal Display (Liquid Crystal Display), which is connected to the signal output terminal of the microcomputer 50 and displays the position of the vehicle by the display control signal output from the microcomputer 50. It consists of 60.

That is, referring to FIG. 1, an operation process of a vehicle navigation apparatus using a conventional GPS, when coordinate data and time data are received through the first GPS receiver 10, the first GPS receiver 10 The received coordinate data and time data are output to the microcomputer 50.

The microcomputer 50 reads the map data stored in the first CD-ROM 40 and inputs coordinate data and visual data output from the first GPS receiver 10 to determine the position of the vehicle. After calculating, and matching the calculated position of the vehicle to the map data read out from the first CD-ROM 40, in order to display on the first LCD display panel 60, a display control signal is displayed on the first LCD. Output to display panel 60 is performed.

In addition, the first LCD display panel 60 displays the map data indicating the position of the vehicle so that the driver can view the display data by the display control signal output from the microcomputer 50.

On the other hand, when coordinate data and time data are not received by the first GPS receiver 10, the microcomputer 50 moves forward direction data of the vehicle detected through the first gyroscope 20 and the first vehicle speed. After analyzing the rotation speed data of the wheel detected by the sensor 30, calculate the position of the vehicle, match the calculated position of the vehicle to the map data read from the first CD-ROM 40, and then In order to display on the first LCD display panel 60, a display control signal is output to the first LCD display panel 60.

In addition, the first LCD display panel 60 displays the map data indicating the position of the vehicle so that the driver can view the display data by the display control signal output from the microcomputer 50.

However, the above-described conventional GPS navigation device using GPS has no device for recognizing a sharp curve in advance when the vehicle is traveling at high speed, and especially when the driver is traveling at high speed at night, Due to the narrow field of view, due to the failure to reduce the speed in advance because the sudden curve was not recognized, there was a problem that frequent accidents occur.

The present invention is to solve the above-mentioned conventional problems, digital signal processing by inputting the image signal output through the CCTV (Digital Signal Processor) unit, the linearity of the road through the digital data processed by the DSP unit Is extracted, compared with the linearity of the numerical map stored in the second CD-ROM, and recognizes the sharp curve length by the comparison result value, the vehicle navigation system that can generate an alarm indication and alarm sound to the driver To provide a curve alarm and method.

In order to achieve the above object, the sharp curve warning device of the vehicle navigation apparatus of the present invention comprises a GPS antenna and a GPS receiver circuit, and a second GPS receiver for receiving coordinate data and visual data of the GPS satellites transmitted from the GPS satellites. ; A second vehicle speed sensor detecting a rotation speed of the vehicle wheel and outputting rotation speed data; A second gyroscope which detects a traveling direction of the vehicle and outputs traveling direction detection data of the vehicle; A CCTV mounted on the vehicle to take an image of a road appearing in front of the vehicle and output an analog image signal; A DSP unit connected to the signal output terminal of the CCTV to input an analog image signal output from the CCTV to convert the digital image signal into a digital image signal, extract linear data from the digital image signal, and output digital linear data; An input unit capable of inputting desired information by the user and outputting a route setting signal when setting a route to be driven; A second CD-ROM in which map data is stored; Coordinate data and time output from the second GPS receiver connected to the signal output terminal of the second GPS receiver, the second gyroscope, the second vehicle speed sensor, the DSP unit and the input unit and the second CD-ROM. Calculates the current position of the vehicle by inputting data, inputs rotational speed data output from the second vehicle speed sensor, calculates the moving distance of the vehicle, and detects the direction of travel of the vehicle output from the second gyroscope; To calculate the rotation angle of the vehicle, read out the map data stored in the second CD-ROM, and compare the digital linear data output from the DSP unit and the numerical map read out from the second CD-ROM. Comparing the linearity, if the digital linear data output from the DSP unit is greater than or equal to the linearity of the numerical map read out from the second CD-ROM, the vehicle position is corrected to guide the corrected vehicle position. The position of the current vehicle to match the map data when the digital linear data output from the DSP unit is smaller than the linearity of the numerical map read out from the second CD-ROM, the vehicle position matched to the map data. Outputs map data and a display control signal to display a, inputs a route setting signal output from the input unit, outputs a voice control signal, and adjusts a rotation angle of the road appearing in front of the vehicle and a reference rotation angle relative to the vehicle speed. In comparison, the central control unit (hereinafter referred to as a CPU) outputting an alarm sound control signal when the rotational angle of the road appearing in front of the vehicle is greater than the reference rotational angle relative to the vehicle speed; A fixed memory device (Read Only Memory; hereinafter referred to as ROM) connected to a signal input / output terminal of the CPU and storing an operation control program of the CPU; A read / write memory (Radom Access Memory), which is connected to a signal input / output terminal of the CPU and temporarily stores data input to the CPU for data processing of the CPU; A graphic control unit connected to a signal output terminal of the CPU and outputting a graphic control signal for inputting and displaying map data and a display control signal output from the CPU; A second LCD display panel connected to a signal output terminal of the graphic controller to display map data and a current position of the vehicle by a graphic control signal output from the graphic controller; A voice output unit connected to a signal output terminal of the CPU to input a voice control signal and an alarm sound control signal output from the CPU, and output a route guidance and an alarm sound of the vehicle as a voice that a user can hear; It features.

1 is a functional block diagram showing a configuration of a vehicle navigation apparatus using a conventional GPS, Figure 2 is a perspective view schematically showing the installation state of a vehicle navigation apparatus using a conventional GPS, Figure 3 is a vehicle navigation according to an embodiment of the present invention 4 is a functional block diagram showing the configuration of a sharp curve alarm device of the apparatus.

Explanation of symbols for the main parts of the drawings

10: first GPS receiver 20: first gyroscope

30: first vehicle speed sensor 40: first CD-ROM

50: microcomputer 60: first LCD display panel

100 second GPS receiver 200 second vehicle speed sensor

300: second gyroscope 400: CCTV

500: DSP unit 600: input unit

700: second CD-ROM 800: CPU

900: ROM 1000: RAM

1100 graphic controller 1200 second LCD display panel

1300: audio output unit

Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

As shown in FIG. 3, the second GPS receiver 100 receives coordinate data and time data, and outputs the coordinate data to the CPU 800. The second vehicle speed sensor 200 rotates the rotation speed data. Is output to the CPU 800, the second gyroscope 300 outputs the heading direction detection data of the vehicle to the CPU 800, the CCTV 400 outputs an analog image signal to the DSP unit 500 The DSP unit 500 inputs an analog image signal output from the CCTV 400, converts it into a digital image signal, extracts linear data from the digital image signal, and converts the digital linear data into the CPU 800. The input unit 600 outputs a route setting signal to the CPU 800, the second CD-ROM 700 outputs map data to the CPU 800, and the CPU 800. ) Inputs the coordinate data and the time data output from the second GPS receiver 100 Calculating a current position of the vehicle, inputting rotational speed data output from the second vehicle speed sensor 200, calculating a moving distance of the vehicle, and a traveling direction of the vehicle output from the second gyroscope 300. Input the detection data, calculate the rotation angle of the vehicle, read out the map data stored in the second CD-ROM 700, the digital linear data and the second CD output from the DSP unit 500 When the linearity of the digital map read from the ROM 700 is compared, and the digital linear data output from the DSP unit 500 is greater than or equal to the linearity of the digital map read from the second CD-ROM 700. And correcting the vehicle position to match the corrected vehicle position to map data, and when the digital linear data output from the DSP unit 500 is smaller than the linearity of the numerical map read out from the second CD-ROM 700, When matching the current vehicle location with map data And outputting map data and a display control signal to the graphic control unit 1100 to display the vehicle position matched with the map data, and inputting a route setting signal output from the input unit 600 to generate a voice control signal. Output to the voice output unit 1300, and compares the rotation angle of the road appearing in the front of the vehicle with the reference rotation angle relative to the vehicle speed, when the rotation angle of the road appearing in front of the vehicle driving is greater than the reference rotation angle relative to the vehicle speed , Outputs an alarm sound control signal to the voice output unit 1300, the ROM 90 outputs an operation control program of the CPU 800 to the CPU 800, and the RAM 1000 is the CPU For the data processing of 800, the data input to the CPU 800 is temporarily stored and output again to the CPU 800, and the graphic controller 1100 map data output from the CPU 800. And display A graphic control signal for inputting and displaying a ray control signal is output to the second LCD display panel 1200, and the second LCD display panel 1200 is controlled by the graphic control signal output from the graphic control unit 1100. Display the map data and the current position of the vehicle, and the voice output unit 1300 inputs the voice control signal and the alarm sound control signal output from the CPU 800, the user hears the route guidance and the alarm sound of the vehicle The present embodiment is constituted by outputting as sound as possible.

Hereinafter, the operation process of the sudden curve alarm device of the vehicle navigation system configured as described above with reference to FIG.

First, the ROM 900 stores an operation control program of the CPU 800, and the RAM 1000 stores data input to the CPU 800 for a data processing operation of the CPU 800. Stores for a while.

Meanwhile, the second GPS receiver 100 receives coordinate data and time data transmitted from a GPS satellite and outputs the same to the CPU 800, and the CPU 800 is output from the second GPS receiver 100. The current position of the vehicle is calculated through the coordinate data and the time data (S1).

In addition, the second gyroscope 300 detects the rotation angle of the vehicle, outputs the direction detection data of the vehicle to the CPU 800, and the second vehicle speed sensor 200 detects the rotation speed of the vehicle wheel. Thus, the rotational speed data of the vehicle wheel is output to the CPU 800, the CPU 800 is the direction detection data of the vehicle output from the second gyroscope 300 and the second vehicle speed sensor 200 The rotational position of the vehicle is tracked by inputting the rotation speed data of the wheel output from the vehicle and calculating the moving distance of the vehicle (S2).

On the other hand, the CPU 800 reads the map data stored in the second CD-ROM 700, and matches the current position of the vehicle calculated with the read map data (S3).

In addition, the CCTV 400 mounted on the vehicle takes an image of a road appearing in front of the vehicle while driving the vehicle, and outputs an analog image signal to the DSP unit 500, and the DSP unit 500 outputs the CCTV. The analog image signal outputted at 400 is input and converted into a digital image signal, the linear data is extracted from the digital image signal, and the digital linear data is output to the CPU 800 (S4).

On the other hand, the CPU 800 inputs the digital linear data output from the DSP unit 500, and calculates the width of the road and the linearity of the road (S5).

Further, the CPU 800 compares the calculated road width with the linearity of the numerical map read out from the second CD-ROM 700 (S6), so that the calculated road width is the second CD-ROM 700. If the value is greater than or equal to the linearity of the numerical map read from, the calculated travel distance is calculated using the calculated road linearity, the travel angle of the vehicle according to the calculated road linearity is calculated (S7), and the calculated travel distance and The current position of the vehicle is corrected according to the moving angle to match the corrected vehicle position with the map data (S8).

Meanwhile, the CPU 800 outputs map data and a display control signal to the graphic controller 1100 in order to display the map data matching the corrected vehicle position, and the graphic controller 1100 controls the CPU 800. Inputting the map data and the display control signal output from the control panel, and outputting a graphic control signal to the second LCD display panel 1200, wherein the second LCD display panel 1200 is output from the graphic control unit 1100. The current position of the vehicle is displayed to the driver by the graphic control signal (S9).

In addition, when the width of the road of the current vehicle position taken by the CCTV 400 is smaller than the road width on the numerical road stored in the second CD-ROM 700, the CPU 800 is configured to perform the second GPS. In order to display the current vehicle position measured by the receiver 100, map data and a display control signal are output to the graphic controller 1100, and the graphic controller 1100 is map data output from the CPU 800. And a display control signal to input a graphic control signal to the second LCD display panel 1200, wherein the second LCD display panel 1200 is connected to the vehicle by the graphic control signal output from the graphic control unit 1100. Displays the current position to the driver (S9).

On the other hand, when the driver inputs a path to drive through the input unit 600, the CPU 800 inputs a path setting signal output from the input unit 600, the voice control signal to the voice output unit 1300 The voice output unit 1300 inputs a voice control signal output from the CPU 800 and outputs a route guidance of the vehicle as a voice that can be heard by the user.

In addition, the CPU 800 compares the reference road rotation angle stored in the CD-ROM 700 with the road rotation angle of the front taken through the CCTV (400) (S10), the CCTV (400) When the road rotation angle of the road taken through is greater than the reference rotation angle compared to the vehicle speed stored in the CD-ROM 700, in order to generate an alarm sound, and outputs an alarm control signal to the voice output unit 1300, The voice output unit 1300 inputs a voice control signal output from the CPU 800, and outputs a sudden curve alert signal as a voice that a user can hear (S11).

As described above, the sharp-curve alarm device and method of the vehicle navigation apparatus of the present invention are digitally processed by inputting an image signal output through CCTV in the DSP unit, and the linearity of the road through the digital data digitally processed in the DSP unit. It extracts and compares the linearity of the numerical map stored in the second CD-ROM, recognizes the sharp curve length by the result of comparison, and generates an alarm indication and an alarm sound to the driver, so that the driver can operate especially at night. At the time, it is possible to reduce the speed by recognizing the sharp curve in advance, there is an effect that can prevent a safety accident.

Claims (2)

A second GPS receiver comprising a GPS antenna and a GPS receiver circuit for receiving coordinate data and time data of the GPS satellites transmitted from the GPS satellites; A second vehicle speed sensor detecting a rotation speed of the vehicle wheel and outputting rotation speed data; A second gyroscope which detects a traveling direction of the vehicle and outputs traveling direction detection data of the vehicle; A CCTV mounted on the vehicle to take an image of a road appearing in front of the vehicle and output an analog image signal; A DSP unit connected to the signal output terminal of the CCTV and inputting an analog image signal output from the CCTV to convert the digital image signal into a digital image signal, extracting linear data from the digital image signal, and outputting the digital linear data; An input unit capable of inputting desired information by the user and outputting a route setting signal when setting a route to be driven; A second CD-ROM in which map data is stored; Coordinate data and time output from the second GPS receiver connected to the signal output terminal of the second GPS receiver, the second gyroscope, the second vehicle speed sensor, the DSP unit and the input unit and the second CD-ROM. Calculates the current position of the vehicle by inputting data, inputs rotational speed data output from the second vehicle speed sensor, calculates the moving distance of the vehicle, and detects the direction of travel of the vehicle output from the second gyroscope; To calculate the rotation angle of the vehicle, read out the map data stored in the second CD-ROM, and compare the digital linear data output from the DSP unit and the numerical map read out from the second CD-ROM. Comparing the linearity, if the digital linear data output from the DSP unit is greater than or equal to the linearity of the numerical map read out from the second CD-ROM, the vehicle position is corrected to guide the corrected vehicle position. The position of the current vehicle to match the map data when the digital linear data output from the DSP unit is smaller than the linearity of the numerical map read out from the second CD-ROM, the vehicle position matched to the map data. Outputs map data and a display control signal to display a, inputs a route setting signal output from the input unit, outputs a voice control signal, and adjusts a rotation angle of the road appearing in front of the vehicle and a reference rotation angle relative to the vehicle speed. In comparison, the CPU outputting an alarm sound control signal when the rotation angle of the road appearing in front of the vehicle is greater than the reference rotation angle relative to the vehicle speed; A ROM connected to a signal input / output terminal of the CPU and storing an operation control program of the CPU; A RAM connected to a signal input / output terminal of the CPU and temporarily storing data input to the CPU for data processing of the CPU; A graphic control unit connected to a signal output terminal of the CPU and outputting a graphic control signal for inputting and displaying map data and a display control signal output from the CPU; A second LCD display panel connected to a signal output terminal of the graphic controller to display map data and a current position of the vehicle by a graphic control signal output from the graphic controller; A voice output unit connected to a signal output terminal of the CPU to input a voice control signal and an alarm sound control signal output from the CPU, and output a route guidance and an alarm sound of the vehicle as a voice that a user can hear; Rapid curve warning device of the vehicle navigation system characterized in that. A current position calculation step (S1) of receiving coordinate data and time data through a second GPS receiver to calculate a current position of the vehicle; After the current position calculation step (S1), input the direction detection data output from the gyroscope to calculate the rotation angle of the vehicle, input the rotation speed data output from the vehicle speed sensor to calculate the moving distance of the vehicle, A movement position tracking step (S2) for tracking the movement position of the; A map data reading step (S3) of reading the map data stored in the second CD-ROM after the moving position tracking step (S2) and matching the current position of the vehicle with the read map data; A digital linear data output step (S4) of converting the analog image signal output from the CCTV to output digital linear data after the map data reading step (S3); A linear calculation step (S5) of calculating a road width and a linear shape of the current vehicle position after the digital linear data output step (S4); A road width comparison step S6 for comparing the road width of the current vehicle location with the road width on the numerical road stored in the second CD-ROM after the linear calculation step S5; After the road width comparison step (S6), if the road width of the current vehicle location is greater than or equal to the road width on the numerical road stored in the second CD-ROM, the moving distance of the vehicle is calculated using the measured road linearity And a moving angle calculation step (S7) of calculating a moving angle of the vehicle according to the measured road linearity; A vehicle position correction step (S8) of correcting the current position of the vehicle according to the calculated movement distance and the movement angle after the movement angle calculation step (S7); After the road width comparison step S6, when the road width of the current vehicle position is smaller than the road width on the numerical road stored in the second CD-ROM, or after the vehicle position correction step S8, the current vehicle of the vehicle A display step S9 for displaying the position; After the display step (S9), the rotation angle comparison step of comparing the road rotation angle and the reference rotation angle relative to the vehicle speed (S10); After the rotation angle comparison step (S10), if the forward road rotation angle is greater than the reference rotation angle relative to the vehicle speed, an alarm sound output step (S11) for outputting an alarm sound, characterized in that Curve alarm method.