JP4008201B2 - Travel warning guidance device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a travel warning guide device that is mounted on a vehicle and that performs warning guidance by voice, especially warning guidance for preventing dangerous travel such as sudden start, sudden stop, and sudden steering.
[0002]
[Prior art]
The driving safety of a vehicle is made up of three elements: road, car, and person. Environment such as road structure and climate, the structure and equipment of the vehicle itself, the character and physical condition of the driving car, etc. are related. With regard to the structure and equipment of the vehicle itself, great progress has been made in recent years with the introduction of electronics, and anti-skid brake systems, airbag systems, obstacle detection systems behind vehicles, inter-vehicle distance / speed control systems, etc. have been put into practical use. Yes. On the other hand, as for matters relating to the driver, a navigation device has been put into practical use as a device for supporting safe driving. In the navigation device, based on the position of the vehicle detected using GPS, the travel route to the destination is displayed on a map on the display to guide intersections along the way, entrances and exits of expressways, service areas It provides an environment where drivers can concentrate on driving by providing voice guidance for parking areas.
[0003]
[Problems to be solved by the invention]
However, the conventional navigation apparatus can notify the road condition and traffic condition by voice, but does not warn the driver by detecting the driving condition. Therefore, simply providing information on road conditions and traffic conditions to the driver cannot contribute to safe driving if the driver is not aware of safe driving.
[0004]
The present invention solves such a conventional problem, and an object of the present invention is to provide a travel warning guide device that can alert a driver to be aware of safe driving.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a travel warning guidance device according to the present invention comprises a dangerous travel detection means for detecting dangerous travel by comparing with a preset reference value, and the same road when the dangerous travel is detected . It is equipped with voice output means that outputs the warning guidance expression, the voice of the speaker's gender or age according to the number of driving times, and is dangerous due to voice when dangerous driving is detected By warning that, the driver can be made aware of safe driving. Also, when warning the driver, it is more effective for the driver by changing to another expression according to the number of times passing the same road, or outputting in the voice of a woman or child rather than repeating the usual warning It is possible to have an awareness of safe driving.
[0006]
Further, the travel warning guide device of the present invention is characterized in that the dangerous travel detection means detects a sudden start or a sudden stop, and a sudden stop that may cause a rear-end collision or a sudden stop that may cause a rear-end collision is detected. If it is detected, a warning to that effect can be given to the driver so that the driver can be aware of safe driving.
[0007]
Further, the travel warning guide device of the present invention is characterized in that the dangerous travel detection means detects a sudden handle, and when a sudden handle that may cause a collision or rollover is detected, that fact is detected. Can be given a driver's awareness of safe driving.
[0008]
Further, the travel warning guidance device of the present invention is characterized in that the steep steering is detected by the dangerous travel detection means using an angular velocity sensor, and the rotation angle of the vehicle is determined by a gyro sensor using the angular velocity sensor. The sudden handle can be detected by detecting or detecting the steering angle by an angular velocity sensor provided on the steering handle.
[0009]
Further, the travel warning guide device of the present invention is characterized in that the warning guidance by the voice output means is performed at a constant ratio or irregularly with respect to the number of warning occurrences, sudden start and stop, If a warning is issued each time when a dangerous driving such as a sudden steering wheel is detected, the driver may feel noisy and may not hear it. Can gradually raise awareness of safe driving.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an in-vehicle navigation device provided with a travel warning guide device in an embodiment of the present invention. In FIG. 1, a vibration gyro, which is an angular velocity sensor, is used for an azimuth sensor 1 to detect a traveling azimuth of a vehicle and a sudden handle of the vehicle. The vehicle speed sensor 2 detects the vehicle speed from vehicle speed pulses corresponding to the vehicle wheel rotation speed. The acceleration sensor 3 detects sudden start and stop of the vehicle, and can detect both acceleration and deceleration. The sensor signal processing unit 4 amplifies signals from the direction sensor 1, the vehicle speed sensor 2, and the acceleration sensor 3 and outputs signals necessary for control. The DVD-ROM drive 5 reads map data, voice data, voice recognition dictionary data, and the like from the DVD-ROM. The liquid crystal display 6 displays a map and the current vehicle position, direction, operation menu, and the like, and includes a light receiving unit 6a that receives a signal from the remote controller 7 on the front surface. The remote controller 7 constitutes an operation unit together with a touch panel and operation buttons provided on the front surface of the liquid crystal display 6. The GPS receiver 8 receives radio waves transmitted from a plurality of satellites and calculates the current position (latitude / longitude) of the vehicle. The GPS antenna 9 is an antenna for receiving GPS radio waves. The external communication control unit 10 is for connecting to an external network such as the Internet via a mobile phone or an adapter. Among these, the DVD-ROM drive 5 is integrated with the liquid crystal display 6, arranged on the dashboard of the vehicle together with the GPS receiver 8, and connected to the communication interface 13 of the apparatus main body 12 through the in-vehicle LAN 11. The apparatus main body 12 is installed in a trunk room of a vehicle or a center console in the vehicle.
[0012]
The microphone 14 is arranged in the vicinity of the driver in the vehicle, and inputs a phrase uttered by the user. The voice recognition unit 15 performs frequency analysis on the word of the phrase input from the microphone 14 and recognizes the input voice. . The image processor 16 performs a display image forming process based on map data, current position data of the own vehicle, building data, and the like. The storage unit 17 includes a ROM that stores programs and data, a RAM that temporarily stores work data, a VRAM that stores image data, and the like. The speech processor 18 converts a phoneme symbol sequence output as a speech recognition result into a speech signal, or converts speech data stored in the ROM of the storage unit 17 into a speech signal. The speaker 19 constitutes an audio output means together with the audio processor 18, and from the search result and voice recognition result, voice guidance such as intersection guidance, branch guidance, toll gate guidance, exit guidance, warning guidance on the driving route, and the remote control 7. Outputs the operation details of the sound. The CPU (Central Processing Unit) 20 includes a current position detection means 21, a route search means 22, a dangerous travel detection means 23, and the like for controlling the entire apparatus and realizing a navigation function. As realized.
[0013]
Next, the operation of the present embodiment will be described first as the navigation device. In FIG. 1, when the apparatus is started up by a predetermined operation, the current position detection means 21 in the CPU 20 receives the position information from the GPS receiver 8 and the signals from the direction sensor 1 and the vehicle speed sensor 2 as a sensor signal processing unit 4. The exact current position of the vehicle is calculated based on the data processed by the above. Based on the vehicle position information, the CPU 20 reads the corresponding road map data from the DVD-ROM through the DVD-ROM drive 5, converts it into image data by the image processor 16, and temporarily stores it in the VRAM of the storage unit 17. The color signal is converted and displayed together with the vehicle position on the screen of the liquid crystal display 6 through the communication interface 13. The road map data can be acquired from an external server through the external communication control unit 10. On the other hand, when an address name such as a destination is input through the microphone 14, the voice recognition unit 15 recognizes the address name, and the CPU 20 sets the address name as the destination and stores it in the RAM of the storage unit 17. The route search means 22 calculates the optimum guide route from the current position of the host vehicle to the specified destination and displays it on the map of the liquid crystal display 6 in an overlapping manner. When the driver advances the vehicle along the guidance route displayed on the liquid crystal display 6, the CPU 20 uses the current position information calculated by the current position detecting means 21 and the road network data on the road map data to display the liquid crystal display 6. The vehicle position mark above will be updated sequentially. When the vehicle reaches a branch point in the guidance route, voice guidance data added to the road map data is output from the speaker 19. The driver can travel to the destination at the shortest distance without hesitation by such guidance of the navigation device.
[0014]
Next, the operation when the driver makes a dangerous run such as sudden start or stop will be described with reference to the flowchart of FIG. The vehicle speed sensor 2 is always in an operating state while the vehicle is running, and the vehicle speed pulse from the vehicle speed sensor 2 is detected by the number of pulses counted for 2 seconds by the counter in the CPU 20. Further, the acceleration sensor 3 is always in an operating state during traveling of the vehicle. For example, in the case of a capacitance type acceleration sensor, when a pendulum that works as a sensor is used as one pole of a capacitor and acceleration is applied to the pendulum, Since the capacitance of the capacitor changes due to the displacement, + acceleration and -deceleration can be detected based on this change. The dangerous running detection means 23 of the CPU 20 monitors the acceleration value by inputting a signal from the acceleration sensor 3 (step S1), and the input acceleration is equal to or higher than the reference value and the vehicle speed is equal to or higher than the reference value. It is determined whether or not the vehicle is in danger driving (step S2). If it is determined that the vehicle is in dangerous driving, the CPU 20 reads out the corresponding warning audio signal from the audio signals stored in the ROM of the storage unit 17, and outputs the audio. A warning indicating danger is output from the speaker 19 via the processor 18 (step S3). The ROM of the storage unit 17 stores a correspondence table of acceleration and vehicle speed as shown in FIG. 2B. When the acceleration value G is G ₁ or more and the vehicle speed V is V ₁ or more, Judged as dangerous driving. The determination of dangerous driving is set so that the acceleration value G increases as the vehicle speed V increases. These numerical values are obtained experimentally. Note that even if the detected acceleration is the same, a warning is output when the vehicle speed is high, and a warning is not output when the vehicle speed is low. The warning sound is, for example, “Dangerous!”, “I will collide!”, “I will be collided!”, Etc.
[0015]
Thus, in the present embodiment, when the driver suddenly starts or stops, the dangerous driving detection means 23 determines whether or not the vehicle is in danger driving by comparing with a predetermined reference value. When it is determined that the vehicle is traveling, a warning to that effect is output by voice, so that the driver can be aware of safe driving.
[0016]
Next, a warning guidance operation when the driver turns the steering wheel will be described with reference to the flowchart of FIG. Although the direction sensor 1 originally detects the traveling direction of the own vehicle, in the present embodiment, it is also used to detect the sudden handle of the vehicle, so it progresses every second based on the clock signal. The direction is detected, and the previous direction and the current direction are stored in the RAM of the storage unit 17 (step S11). The dangerous running detection means 23 of the CPU 20 inputs a signal from the direction sensor 1 and compares the previous value of the azimuth with the value of the current azimuth. In addition, it is determined whether or not the vehicle is in a dangerous driving state in which the vehicle speed is equal to or higher than a reference value (step S12). The corresponding warning sound signal is read out, and a warning indicating danger is output from the speaker 19 via the sound processor 18 (step S13). The ROM of the storage unit 17 stores a correspondence table between the azimuth difference and the vehicle speed as shown in FIG. 3B. The azimuth difference value θ is θ ₁ or more and the vehicle speed V is V ₁ or more. If it is judged as dangerous driving. The judgment of dangerous driving is set so that the azimuth difference value θ decreases as the vehicle speed V increases. These numerical values are obtained experimentally. Even if the detected heading difference is the same, a warning is output when the vehicle speed is high, and a warning is not output when the vehicle speed is low. The warning sound is, for example, “Dangerous!” Or “I will collide!”.
[0017]
As described above, in the present embodiment, when the driver turns the steering wheel suddenly, the dangerous driving detection means 23 determines whether it is dangerous driving or not by comparing with a predetermined reference value. If it is determined that the warning is issued, a warning to that effect is output by voice, so that the driver can be aware of safe driving.
[0018]
In the above embodiment, whether or not to warn is changed according to the driving state. However, when it is determined that the vehicle is in danger driving, it is at a fixed rate or irregularly with respect to the number of occurrences. You can also give a warning. For example, when traveling on the same road throughout the year, such as a regular flight truck, a warning is output at a rate of several times or once a week or once a month. In addition, if the expression of the warning or the gender or age of the speaker is changed according to the time zone or season of daytime or nighttime, or according to an event such as Golden Week or New Year, it is timely considering the degree of congestion on the road. Can be output a warning. In the above embodiment, the detection of the sudden handle is detected from the rotation angle of the vehicle due to the change in the direction of the vehicle, but the sudden handle is detected by detecting the steering angle by the angular velocity sensor provided in the steering handle. You may make it do.
[0019]
【The invention's effect】
As described above, the present invention relates to dangerous traveling detection means for detecting dangerous traveling by comparing with a preset reference value, and voice output means for outputting warning guidance by voice when dangerous traveling is detected. When a dangerous driving is detected, it is possible to give the driver awareness of safe driving by warning that it is dangerous by voice. It is possible to provide an excellent driving support device exceeding the above.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram illustrating a configuration of a navigation device including a travel warning guide device according to an embodiment of the present invention. FIG. 2 illustrates a travel warning guide process at a sudden start or stop according to an embodiment of the present invention. Schematic flowchart [FIG. 3] Schematic flowchart showing a travel warning guidance process at the time of sudden steering according to an embodiment of the present invention [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Direction sensor 2 Vehicle speed sensor 3 Various sensors 4 Sensor signal processing part 5 DVD-ROM drive 6 Liquid crystal display 7 Remote control 8 GPS receiver 9 GPS antenna 10 External communication control part 11 In-vehicle LAN
12 Communication Interface 13 Device Main Body 14 Microphone 15 Voice Recognition Unit 16 Image Processor 17 Storage Unit 18 Voice Processor 19 Speaker 20 CPU
21 current position detection means 22 route search means 23 dangerous driving detection means

Claims (7)

Dangerous driving detection means for detecting dangerous driving by comparing with a reference value set in advance , and expression of warning guidance, gender or age of the speaker depending on the number of times of driving on the same road when the dangerous driving is detected A travel warning guidance device comprising: voice output means for changing and outputting the voice.   The travel warning guide device according to claim 1, wherein the dangerous travel detection means detects a sudden start or a sudden stop.   The travel warning guide device according to claim 1 or 2, wherein the dangerous travel detection means detects a sudden handle by rotation of the vehicle.   The travel warning guide device according to claim 1 or 2, wherein the dangerous travel detection means detects a sudden handle by rotation of a steering handle.   4. The travel warning guidance device according to claim 3, wherein the dangerous steering detection means detects the sudden handle using an angular velocity sensor.   6. The travel warning guidance device according to claim 1, wherein the warning guidance by the voice output means is performed at a constant ratio with respect to the number of times the warning is generated.   6. The travel warning guide device according to claim 1, wherein the warning output by the voice output means is irregularly performed with respect to the number of times the warning is generated.

Images