JPH0668399A - Control system for distance to precedent vehicle - Google Patents

Abstract

PURPOSE:To control the interval to the precedent vehicle by detecting the travel speed of a vehicle and the distance to the precedent vehicle. CONSTITUTION:The vehicle is mounted with an inter-vehicle distance detecting means 42 for the precedent vehicle, a travel speed detecting means 41 which detects the current travel speed of the vehicle, a means 52 which detects the time required for the vehicle to reach the precedent speed at the current travel speed and compares its information by a microcomputer 45 to send a speed limit command signal 51, a warning display and a warning sound to a driving function part 50 so that the vehicle travels below the speed based upon the information, and the driving function part 50 which performs driving operation on the basis of the command; and the inter-vehicle distance is administrated and controlled. Then the inter-vehicle distance is administrated and controlled to evade the worse traffic accident even if the vehicle driver overlooks a signboard and an attention sign showing a traffic signal and traffic regulations or ignores a speed limit warning intentionally or unconsciously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preceding vehicle-to-vehicle distance control system for detecting a traveling speed of a vehicle and an inter-vehicle distance to a preceding vehicle to control an inter-vehicle distance.

[0002]

2. Description of the Related Art In recent years, electronic technology has been widely used in traffic management systems.

In a conventional traffic management system, by collecting wide-ranging traffic conditions and traffic road information with a vehicle detector, a TV camera, etc., the ever-changing road traffic conditions can be collected in a computer of a traffic control center. . The traffic control center computer centrally manages, calculates, analyzes and judges various traffic information data and displays it on the central display board (map board) or monitor TV receiver. In order to prevent accidents, many traffic management systems, such as transmitting signals to traffic lights and signboards (traffic signs) that indicate traffic restrictions, and calling by radio broadcasting on highways, etc. The effect of preventing traffic accidents is appearing.

Further, the vehicle itself has an effect of preventing traffic accidents by improving various functions. For example, when the vehicle runs at a speed higher than a certain speed, a chime occurs, and the driver performs a deceleration action by a function of warning the vehicle driver, that is, the driver of the speed limit because the vehicle is too fast.

That is, after recognizing a traffic signal, a speed regulation mark, and a warning signal from the traffic management system, the driver actively operates the brake to decelerate by operating the brake.

The first cause of occurrence of traffic accidents such as vehicles is not complying with the speed limit, and the precious life is lost due to the driver's reckless driving over speed. Awareness raising is required to raise awareness of strict adherence.

[0007]

However, in the above-mentioned conventional configuration, in order to prevent a traffic accident such as a vehicle, a signal board or a sign (indicator) indicating traffic regulation is installed, a call is made by radio broadcasting on a highway, etc. Also, the function to warn the driver of the speed limit when the vehicle is running at a certain speed or more and the chime becomes too fast, and the driver actively accepts the brake after passively accepting the speed limit. I was carrying out actions to slow down. Therefore, if the driver overlooks or misses the signboards or calls mentioned above, or if he / she consciously or unknowingly ignores the warning, it is the responsibility of the vehicle operator, of course, but it is the speed limit. However, there was a problem in that it could not avoid the occurrence of a traffic accident in the worst case because it collided with a preceding vehicle.

The present invention solves the above-mentioned conventional problems. Even when a driver overlooks or misses a signboard or a call, or when a warning is consciously or unknowingly ignored, the automatic It is an object of the present invention to provide a preceding vehicle-to-vehicle distance control system that secures a vehicle-to-vehicle distance from a vehicle ahead and avoids a traffic accident.

[0009]

To achieve the above object, a preceding vehicle-to-vehicle distance control system of the present invention detects an inter-vehicle distance to a preceding vehicle and a current traveling speed of the vehicle. Driving speed detection means and time to reach the preceding vehicle at the current running speed of the vehicle are detected, and the information is compared by the computer, and the command and warning display / warning from the computer to the driving function unit to make the speed below the above information Means for issuing sound,
The vehicle is provided with a drive function unit that is driven based on the above-mentioned command, and the vehicle-to-vehicle distance is managed and controlled.

[0010]

According to the present invention, in addition to the signal board for preventing traffic accidents such as vehicles in the conventional traffic control system and the traffic control system and the speed display in the cockpit of the vehicle in the above-mentioned structure, An inter-vehicle distance detecting means for detecting an inter-vehicle distance to a preceding vehicle, a traveling speed detecting means for detecting a current traveling speed of the vehicle, and a time at which the vehicle reaches the preceding vehicle at the current traveling speed of the vehicle are detected and the information thereof is displayed. The vehicle is equipped with a means for issuing a command and a warning display and a warning sound so that the speed can be compared with the above-mentioned information to the drive function unit by a computer, and a drive function unit that drives based on the above command. A warning sound can be issued to instruct the operator to warn that it is too much. Then, it contributes to raising the awareness of the vehicle operator and raising the traffic morale so as to voluntarily comply with the vehicle speed and perform control, and the vehicle can keep the limited inter-vehicle distance to avoid the occurrence of a traffic accident.

Further, according to the present invention, in addition to a marking plate (marker) indicating a speed regulation for preventing a traffic accident such as a vehicle in a conventional traffic control system, modulated ultrasonic waves or radio waves corresponding to those warnings are displayed. By transmitting signal waves,
The vehicle has a receiving unit that receives the modulated ultrasonic waves or radio signal waves, an inter-vehicle distance detecting unit that detects an inter-vehicle distance between the vehicle and a preceding vehicle, a speed detecting unit that detects a current traveling speed, and the current state of the vehicle. Detecting the time to reach the preceding vehicle at the traveling speed of, comparing the information with a computer and issuing a command and a warning display and a warning sound to the drive function unit so that the speed is less than the above information, and the command The drive function unit is driven based on the control function to automatically manage and control the vehicle speed, even if the driver intentionally or unintentionally steps on the accelerator to increase the speed. The vehicle speed can be managed and the inter-vehicle distance can be controlled so that the speed does not exceed the commanded speed.

[0012]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the preceding vehicle-to-vehicle distance control system according to the present embodiment includes a traveling speed detecting means 41 for detecting the current traveling speed of the vehicle and an inter-vehicle distance detecting means 42 for detecting an inter-vehicle distance to the preceding vehicle. And a microcomputer 45 as a means for detecting the time at which the vehicle reaches the preceding vehicle at the current traveling speed of the vehicle and comparing the information with the information. The vehicle is equipped with a speed limit command signal 51 for outputting a speed limit warning signal / warning sound to set the speed, and a drive function unit 50 that drives based on the command signal. A vehicle-to-vehicle distance control system characterized by managing a distance and performing control.

Generally, the traveling of a vehicle has a structure in which the rotation of the engine 1 is caused to rotate the drive tire 5 via the mission 2 and the propeller shaft 4.

The vehicle running speed detecting means 41 transmits the rotation of the conduction shaft of the wheel or the mission system to the rotation of the speedometer flexure shaft, and inputs the rotation to the speedometer 6. The means for measuring the number of rotations of the speedometer flexible shaft is equipped with a magnet around the central axis of the flexible shaft, and is supported by a metal disk in the vicinity of the rotating magnet, and a bearded mainspring is attached to the central shaft. The outer edge is fixed. The disk receives a torque in the rotating direction of the magnet due to the eddy current generated by the rotation of the magnet. Since the magnitude of the torque is proportional to the number of rotations, the disk turns to the point where it balances the power of the hairspring. The position of the pointer linked to the hairspring is posted on the speed dial. Further, in the traveling speed detecting means 41, the eddy current is converted into a digital amount by the A / D conversion section 7, the output is counted by the digital counter 8 and is instructed from the microcomputer 45, and the traveling speed / status display section of the vehicle. The traveling speed and traveling condition are displayed on the liquid crystal display device 9 or the like.

Here, the drive function section 50 of the vehicle manages the drive functions of the vehicle such as the engine controller section, the brake controller section, the gear change section, the conduction drive control section, the traveling distance control section, the traveling direction control section. It refers to the controlling part or the whole.

The relationship and operation of each component will be described below. First, the vehicle-to-vehicle distance detecting means 42 is a radar device that generally uses a highly directional electromagnetic wave such as radio waves, lasers, and ultrasonic waves as a measurement medium, and a reflected wave of the transmitted electromagnetic wave by the preceding vehicle can be obtained. If so, the inter-vehicle distance can be accurately measured. In this device for detecting the inter-vehicle distance between preceding vehicles, the direction of the radar is rotated in accordance with the direction and the angle of steering steering to obtain the reflected wave from the preceding vehicle and measure the inter-vehicle distance.

Assuming that the preceding vehicle has stopped due to an accident or the like, the predicted time T _c until the vehicle reaches the preceding vehicle is
It can be calculated from the above inter-vehicle distance and traveling speed. If the time T _c measured intermittently is T _cn-1 and T _cn ,
(T _cn -T _cn-1 )> 0 is the acceleration state, (T _cn -T _cn-1 ) <
It can be said that 0 is the deceleration state.

As described above, the speed limit command signal 51 and the warning display / warning sound are issued from the microcomputer 45 to the drive function unit 50 based on the above information so as to make the traveling speed of the vehicle less than the above information. 52 and a drive function unit 50 that drives based on a speed limit command signal 51 are provided in a vehicle, and a vehicle-to-vehicle distance control system is provided which manages and controls a vehicle-to-vehicle distance by opening / closing control of a slot valve. can do.

That is, according to the present invention, it is possible to issue a warning sound from the surrounding vehicle operators about the careless behavior of the vehicle operator over the speed limit, and recognize the warning sound to comply with the vehicle speed voluntarily. This will contribute to raising the awareness of the vehicle operator and raising the traffic morale by controlling the vehicle so that the vehicle can keep the limited inter-vehicle distance and avoid the occurrence of traffic accidents.

As is clear from the first embodiment, by measuring the inter-vehicle distance of the traveling vehicle, the speed limit command signal 51 and the warning display / warning sound are transmitted from the computer to the drive function unit 50 so that the speed is lower than the information. By causing the means 52 for issuing the command and the drive function unit 50 that drives based on the above command,
It controls the vehicle speed and controls the vehicle speed by controlling the vehicle speed so that it does not exceed the command speed even if the vehicle operator consciously or unconsciously steps on the accelerator to increase the speed. There is an effect that can be done.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 2 and 3, the preceding vehicle-to-vehicle distance control system of the present embodiment has a traveling speed command device 31 equipped with a transmission / transmission means 30 for transmitting and transmitting an appropriate traveling speed command signal to the vehicle. Install near the. On the other hand, the vehicle has a receiving unit 40 for receiving the speed limit command signal 51 and a traveling speed detecting means 4 for detecting the current traveling speed of the vehicle.
1, an inter-vehicle distance detecting means 42 for detecting an inter-vehicle distance between the vehicle and the preceding vehicle, and a microcomputer as means for detecting the time to reach the preceding vehicle at the current traveling speed of the vehicle and comparing the information. 45 is provided. Then, the speed limit command signal 51 and a warning display are issued from the microcomputer 45 to the drive function unit 50 so that the speed is lower than the information.
It is provided with a means 52 for issuing a warning sound and a drive function section 50 for driving based on the command signal.

The receiving unit 40 for receiving the information signal in the above-mentioned vehicle is, for example, a receiving unit for wireless communication of various modulated ultrasonic waves or laser or light, demodulates this and converts it into a digital signal, and the information is stored in the microcomputer 45. It has a traveling speed / situation display section 9 for output display.

The above-mentioned running speed detecting means 41, for example, converts the number of rotations of the wheels or the transmission shaft of the vehicle with an electromagnetic pulse counter and measures it with a running speed detector, and at the same time displays the information to the operator, the microcomputer 45. The output is displayed.

Here, the drive function unit 50 of the vehicle manages the drive functions of the vehicle such as the engine controller unit, the brake controller unit, the gear change unit, the conduction drive control unit, the traveling distance control unit, and the traveling direction control unit. It refers to the controlling part or the whole.

The relationship and operation of each component will be described below. First, the computer 10 of the traffic control device manages and calculates the road traffic situation that changes momentarily in a partial area by means of collecting information data from a sensor that detects the road surface condition or traffic congestion situation in a narrow range. A transmission / transmission means 30 is provided for analyzing and judging, transmitting and displaying the data on the traffic signal 23 and the road marking plate (marker) 24 indicating the traffic regulation, and at the same time transmitting and transmitting the data to the traveling vehicle. The transmission / transmission unit 30 is, for example, a transmission unit of wireless communication using various modulated ultrasonic waves or laser or light that is cycled to a traveling speed or an indicator light.

On the other hand, in the vehicle, a receiving section 40 for receiving the information signal, a running speed detecting means 41 for detecting the current running speed of the vehicle, and an inter-vehicle distance detecting means 42 for detecting an inter-vehicle distance between the preceding vehicle and the vehicle. A microcomputer 45 is provided as means for detecting the time when the vehicle reaches the preceding vehicle at the current traveling speed of the vehicle and comparing the information with the information. The microcomputer 45 provides the drive function unit 50 with a speed limit command signal 51, a warning display / warning sound issuing unit 52, and a drive function unit 50 that drives based on the command so that the traveling speed is equal to or lower than the information. .

A sensor for detecting the road surface condition of a road is equipped with a road surface depression detector or the like in the road space to catch a change in the road surface condition such as a depression on the road surface or the presence or absence of an obstacle.
As a sensor for detecting the traffic congestion situation, an ultrasonic vehicle detector is installed in the road space or a loop antenna is buried under the ground to catch the number of vehicles passing through and driving guidance.

A computer 1 of the traffic control center which collects the above-mentioned caught information data to a traffic control device near the line via a line
0 manages the ever-changing road traffic situation in partial areas,
The transmission / transmission means 30 transmits and transmits to the traveling vehicle after calculation, analysis and determination. Depending on the content of the caught information data, it is possible to provide a transmission / transmission means 30 that directly transmits / transmissions to the traveling vehicle at any time without using the computer 10 of the traffic control center.

That is, the present invention can issue a command and a warning sound so that the operators of the surrounding vehicles can set an appropriate traveling speed when the traveling speed of the vehicle operator is careless.
Then, it contributes to raising the awareness of the vehicle operator and enhancing the traffic morals so that the vehicle automatically follows the driving distance and avoids the occurrence of traffic accidents.

As is clear from the second embodiment, a large number of sensors and transmission transmitting means 30 for detecting the road surface condition and traffic congestion in a narrow area and the transmission transmitting means 30 are installed at a high density so that the transmission information to the vehicle can be transmitted. In order to promptly and abundantly issue a driving guidance command to each vehicle, a receiving unit 40 that receives the information signal, a traveling speed detection unit 41 that detects the current traveling speed of the vehicle, and an inter-vehicle distance detection between the preceding vehicle. Means 4
2 and the current traveling speed of the vehicle, the microcomputer 45 as a means for detecting the time to reach the preceding vehicle at the current traveling speed and comparing the information to the drive function unit 50 so that the traveling speed is less than the information. 51, a warning display / warning sound issuing means 52, and a drive function unit 50 that drives based on the command, the driving vehicle checks the distance from the preceding vehicle and runs at a certain distance. In addition, the automatic stop function included in the drive function unit 50 operates to avoid a rear-end collision with the preceding vehicle.

(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 3, the preceding vehicle-to-vehicle distance control system according to the present embodiment uses a vehicle detector 11, a TV camera 12, a patrol car 13 and the like in a wide range of traffic conditions and traffic road information as in the conventional traffic management system. By collecting the, the road traffic conditions that change every moment in the area are collected in the computer 10 of the traffic control center. The computer 10 centrally manages, calculates, analyzes, and determines various traffic information data sent from the vehicle detector 11 and the like, and displays the data on the central display board (map board) 21 and the monitor TV receiver 22. .

The computer 10 of the traffic control center uses the information of the judgment result signal 26 as a traffic sign 23 to prevent traffic accidents such as vehicles and a road marking plate (sign) indicating traffic restrictions.
24, and controls the blue seconds of the signal light 25 and appropriately regulates the speed limit amount of the road marking plate (sign) 24.

Further, in the present embodiment, the transmission and transmission means for transmitting and transmitting the information of the judgment result signal 26 of the computer 10 to the traffic signal 23 and the road marking plate (sign) 24 indicating the traffic regulation etc. to the vehicle. 30 is provided.
The transmission / transmission means 30 is, for example, a transmission section for wireless communication of various modulated ultrasonic waves or laser or light synchronized with a speed limit amount or a signal lamp.

On the other hand, in the vehicle, a receiving unit 40 for receiving the information signal, a traveling speed detecting means 41 for detecting the current traveling speed of the vehicle, and an inter-vehicle distance detection for detecting an inter-vehicle distance between the vehicle and a preceding vehicle. The means 42 and the microcomputer 45 as means for detecting the time to reach the preceding vehicle at the current traveling speed of the vehicle and comparing the information are provided.
Then, the speed limit command signal 51 is sent from the microcomputer 45 to the drive function unit 50 so that the speed is equal to or less than the information.
A warning sign / warning sound issuing means 52 for issuing a warning display and a warning sound, and a drive function section 50 for driving based on the command.

The receiving section 40 for receiving the information signal in the above-mentioned vehicle is, for example, a receiving section for wireless communication of various modulated ultrasonic waves or laser or light and demodulating the demodulated ultrasonic wave, converting it into a digital signal, and storing the information in the microcomputer 45. It has a function to output and display.

The above-mentioned running speed detecting means 41 converts, for example, the number of revolutions of the wheels or the conduction shaft of the vehicle with an electromagnetic pulse counter and measures it with a running speed detector, and displays the information to the vehicle operator and at the same time the microcomputer 45. The output is displayed.

Here, the drive function section 50 of the vehicle manages the drive functions of the vehicle such as the engine controller section, the brake controller section, the gear change section, the conduction drive control section, the traveling distance control section, the traveling direction control section. It refers to the controlling part or the whole.

The relationship and operation of each component will be described below. By collecting a wide range of traffic conditions and traffic road information with the vehicle detector 11, the TV camera 12, the patrol car 13, etc., the ever-changing road traffic conditions are collected in the computer 10 of the traffic control center.
The computer 10 centrally manages, calculates, analyzes and judges various traffic information data and displays them on the central display board (map board) 21 and the monitor TV receiver 22, and the computer 10 of the traffic control center judges the judgment result signal 26. When the maximum speed limit of 50 km is transmitted to the road marking plate (sign) 24, the transmission / transmission means 30 transmits wireless communication from the transmission unit to the traveling vehicle. The vehicle receives the information signal from the receiving unit 40.
The current traveling speed of the vehicle is detected by the traveling speed detecting means 41, and the output is detected by the microcomputer 45.
Compare with. When the microcomputer 45 determines that the speed is exceeded, a deceleration command is issued and the automatic deceleration unit included in the drive function unit 50 operates. Also microcomputer 4
The warning display / warning sound issuing means 52 tells the driver of the vehicle to automatically decelerate. At this time, even if the driver steps on the accelerator, the speed limit of 50 km cannot be exceeded, and only the brake is effective.

Therefore, even if the driver overlooks or misses the traffic signal 23, the road marking plate 24, or the call, or if the warning is consciously or unintentionally ignored, the vehicle automatically operates. It is possible to avoid the traffic accident by protecting the restricted inter-vehicle distance.

As the vehicle running speed detecting means 41, the vehicle-to-vehicle distance control system as described in the first embodiment can be used.

The difference of the third embodiment from the second embodiment is that in the second embodiment, information data from a sensor for detecting a road surface condition or a traffic congestion condition of a road in a narrow range is installed or That is, the computer of the traffic control device near the traveling vehicle is provided with the transmission / transmission means 30 which analyzes and judges and immediately informs the vehicle traveling in the vicinity. Further, according to the content of the caught information data, it is possible to provide the transmission / transmission means 30 for transmitting / transmission directly to the traveling vehicle at any time without going through the center computer. Therefore, there is an advantage that the local road condition and the inter-vehicle distance can be closely observed and promptly responded to to issue a command to each vehicle.

Further, by installing a large number of sensors and transmission / transmission means 30 for detecting the road surface condition and traffic congestion in a narrow area with high density, the information transmitted to the vehicle can be abundantly and quickly transmitted to each vehicle. The microcomputer 45 and the microcomputer 45 of the receiving unit 40 for receiving the information signal, the traveling speed detecting means 41 for detecting the current traveling speed of the vehicle, and the means for comparing the information in order to transmit the traveling guidance command. To the drive function unit 50 from the command signal 51 that limits the speed to a traveling position below the information.
With a means 52 for issuing a warning display / warning sound and a drive function section 50 for driving based on the command, the distance between the vehicle in which the driver is driving and the preceding vehicle is confirmed, and a certain distance is maintained. It is possible to drive, and the automatic stop function operates to avoid a rear-end collision with a preceding vehicle.

Further, according to the traffic condition, the information board, the warning board, the road variable sign board 26 and the indicator are controlled together with the traveling speed management of the vehicle to guide the vehicle to avoid road congestion, so that the traffic congestion is reduced and the vehicle is Since the number of unnecessary stoppages is reduced,
Exhaust gas at the time of starting is reduced, vehicle noise is also reduced, the flow of the vehicle is smooth, traffic congestion and the number of stoppages are reduced, so accidents due to irritating driving are reduced, and the vehicle is driven by a more effective driving management system. Great economic benefits such as reduced time and fuel economy.

(Fourth Embodiment) Finally, a fourth embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 4, the preceding vehicle-to-vehicle distance control system of the present embodiment is a vehicle-to-vehicle distance detecting means 42 with respect to the preceding vehicle.
Electromagnetic waves are transmitted in the vertical direction in front of the vehicle in three directions, for example, the first direction is horizontal, the second direction is the look-down angle (depression angle) θ ₂ direction, and the third direction is the look-up angle (elevation angle) θ ₃ direction. And a transmission means for receiving the reflected waves of the transmitted electromagnetic wave in the three directions by the preceding vehicle, outputting a direction signal indicating the receiving direction of the reflected wave, and a propagation delay time from the transmission of the electromagnetic wave to the reception of the reflected wave. A direction distance measuring means for calculating a distance to the preceding vehicle and outputting a distance signal is provided.

Storage means for storing the three-way signals and respective distance signals, and to determine increase / decrease in propagation delay time of reflected wave by the preceding vehicle stored in the storage means when the transmitted waves are intermittently transmitted. Discriminating means for outputting a signal, the discriminating means for discriminating that the reflected wave from the road surface is invalid based on the propagation delay time when the transmitting direction is a downward angle (depression angle), and outputting the signal, and the transmitting direction is horizontal. Detecting an inter-vehicle distance with a preceding vehicle, characterized by having a determining means for determining a propagation delay time of a reflected wave of a predetermined value or more as invalid and outputting a signal in the case of transmission of a direction and a look-up angle (elevation angle). It is a device that does.

That is, in the case of the second direction signal, the distance signal within the distance (l ₂ ) corresponding to the traveling speed is regarded as a reflection signal from the road surface and treated as an invalid signal. Further, in the case of the third direction signal, if no reflected wave is received within a preset time, it is considered that the reflecting object is not in the vicinity and processing is performed. Further, in the case of the third direction signal, the height (l ₃ ) to the reflecting object in the sky is calculated based on the propagation delay time from the transmission of the electromagnetic wave to the reception of the reflected wave. It is characterized by determining whether or not there is. Therefore, if it is determined that the object has a height that does not hinder the running, such as a tunnel, a traffic control marking device, or an overpass, it is treated as an invalid object. On the other hand, the obstacle that approaches the front is discriminated as an obstacle to running and outputs a signal.

When the transmitting means for transmitting electromagnetic waves is installed on the vehicle body at the position d from the road surface, the following (1),
Equation (2) holds.

Tan θ ₂ = d / l ₂ (1) (maximum height of vehicle) <(d + l ₃ ) ... (2) In the transmitting means for transmitting the horizontal electromagnetic wave in the first direction, the traveling speed V ₁ A distance signal equal to or greater than the distance (l ₁ ) corresponding to is set in a storage unit that stores the distance signal as a safe inter-vehicle distance. That is, the distance required to safely decelerate and stop the current traveling speed V _{1 is set} to l ₁ . In addition, a determination is made to output a signal to maintain a safe inter-vehicle distance by calculating the relative traveling speed of the own vehicle and the traveling speed of the preceding vehicle or the increase / decrease situation of the inter-vehicle distance with the preceding vehicle. Have means.

The vehicle, which is being driven by the vehicle, is equipped with the determination means of the preceding vehicle-to-vehicle distance detecting device and the drive function unit, and can check the distance between the preceding vehicle and keep a certain distance. The automatic stop function operates to avoid a rear-end collision with a preceding vehicle.

[0054]

As is apparent from the above embodiments, according to claim 1 of the present invention, a display board for digitally displaying the traveling speed is provided on the outer body of the vehicle, or the traveling speed is ramped on the outer body of the vehicle. The vehicle is provided with means for displaying the color of the vehicle or the number of lighting of the lamp, and their traveling speeds can be monitored and alerted by the people around the vehicle together with the operator.

The effect of the conventional vehicle-to-vehicle distance control system is to be more surely ensured, and when the driver overlooks the traffic lights or the signboards indicating traffic restrictions, the driver is aware of the speed limit warning. Even if the driver accidentally or unknowingly ignores it, the driver of another vehicle can detect the danger and avoid the worst traffic accident.

That is, according to the present invention, a warning sound can be issued from the vehicle operators in the vicinity of the careless behavior of the vehicle operator when the speed limit is exceeded. And, when it is recognized by others, it contributes to raising the awareness of the vehicle operator and enhancing the traffic morale so that the vehicle speed is voluntarily observed and controlled.
The vehicle voluntarily protects the limited inter-vehicle distance and avoids the occurrence of traffic accidents.

According to the second aspect of the present invention, when the driver overlooks or misses the signboard or the caller indicating the traffic signal or traffic regulation, or the warning is consciously or unconsciously ignored. Even in such a case, the speed limit is automatically increased, and the worst traffic accident can be avoided.

That is, according to the present invention, even when the operator overlooks or misses the above-mentioned signboard or call, or when the warning is intentionally or unconsciously ignored,
The vehicle automatically protects the restricted inter-vehicle distance and avoids the occurrence of traffic accidents.

According to claim 3 of the present invention, when the information of the computer of the traffic control center sends the maximum speed limit of 50 km to the road marking plate (sign), the function of transmitting and transmitting is transmitted to the vehicle running from the transmitting unit. Send wireless communication. The vehicle receives the information signal, compares the output of the function that detects the current traveling speed of the vehicle with a microcomputer, and if the microcomputer determines that the speed is excessive, it issues a deceleration command to the drive function unit and the automatic deceleration unit. Works. Further, the driver can be informed of the purpose of the automatic deceleration by means of the warning display / warning sound issued by the microcomputer.
At this time, even if the driver steps on the accelerator, the speed limit is 5
Only the brakes will be effective, as it cannot exceed 0km.

According to claim 4 of the present invention, the effect of the vehicle-to-vehicle distance control system according to claims 1, 2 and 3 of the present invention can be more surely enforced, and the determination of the preceding vehicle-to-vehicle distance detecting device can be made. The vehicle being driven by the means and drive function means can check the distance from the preceding vehicle and keep a certain distance, and the automatic stop function operates to cause a rear-end collision with the preceding vehicle. It is possible to realize an excellent inter-vehicle distance control system for preceding vehicles that can be avoided.

[Brief description of drawings]

FIG. 1 is a block diagram of a traffic management system according to a first embodiment of this invention.

FIG. 2 is a block diagram of a traffic management system according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a traffic management system according to a third embodiment of the present invention.

FIG. 4 is a schematic explanatory diagram of a traffic management system according to a fourth embodiment of the present invention.

[Explanation of symbols]

 10 Traffic Control Center Computer 30 Transmission Transmission Means 31 Travel Speed Command Device 40 Receiver 41 Travel Speed Detection Means 42 Inter-Vehicle Distance Detection Means 45 Microcomputer 50 Drive Function Unit 51 Speed Limit Command Signal 52 Warning Display / Warning Sound Warning Means

Claims (4)

[Claims] 1. An inter-vehicle distance detecting means for detecting an inter-vehicle distance to a preceding vehicle, a current traveling speed of a vehicle, a time for reaching the preceding vehicle at the traveling speed is detected, and the information is compared by a microcomputer. An inter-vehicle distance is provided by providing a vehicle with a speed limit command signal and means for issuing a warning display / warning sound to the drive function unit so that the speed is equal to or lower than the information, and a drive function unit driven based on the command signal. A preceding vehicle-to-vehicle distance control system that manages and controls the vehicle. 2. A traveling speed command device having a transmission / transmission means for transmitting and transmitting an appropriate speed limit command signal to a vehicle, and a vehicle-interval for detecting an inter-vehicle distance between a receiving section for receiving the information in the vehicle and a preceding vehicle. Distance detection means, travel speed detection means for detecting the current travel speed of the vehicle and time at which the vehicle arrives at the preceding vehicle at the current travel speed of the vehicle are detected, and the information is compared by a microcomputer to the drive function unit. The vehicle is equipped with a speed limit command signal, a means for issuing a warning display / warning sound so that the speed is less than or equal to the information, and a drive function unit that drives based on the command signal, to manage and control the inter-vehicle distance. The preceding vehicle-to-vehicle distance control system. 3. A traffic control center computer which is a means for centrally managing, calculating, analyzing and judging traffic condition or road information data, and means for collecting a wide range of traffic conditions and road traffic information, and based on the judgment. A traveling speed command device having a transmission / transmission means for transmitting and transmitting an appropriate road guidance command signal to a vehicle, and an inter-vehicle distance detection means for detecting an inter-vehicle distance between a receiving section for receiving the above information in the vehicle and a preceding vehicle. , The traveling speed detecting means for detecting the current traveling speed of the vehicle and the time at which the vehicle arrives at the preceding vehicle at the current traveling speed of the vehicle are detected, and the information is compared by a microcomputer, and the speed is less than that information in the drive function unit. As described above, the vehicle is equipped with a speed limit command signal, means for issuing a warning display / warning sound, and a drive function unit that drives based on the command signal, and manages and controls the inter-vehicle distance. Unishi was the preceding vehicle-to-vehicle control system. 4. An inter-vehicle distance detecting means for detecting an inter-vehicle distance to a preceding vehicle according to claim 1, 2 or 3, and a transmitting means for transmitting an electromagnetic wave in a plurality of different transmission directions in a vertical direction in front of the vehicle. Receives the reflected wave of the transmitted electromagnetic wave from the preceding vehicle, outputs a direction signal indicating the receiving direction of the reflected wave, and also determines the distance to the preceding vehicle based on the propagation delay time from the transmission of the electromagnetic wave to the reception of the reflected wave. Directional distance measuring means for calculating and outputting a distance signal, storage means for storing the direction signal and the distance signal, and a reflected wave from the preceding vehicle stored in the storage means when the transmitted wave is intermittently transmitted. Discriminating means for discriminating an increase / decrease in the propagation delay time and outputting a signal, and in the case of transmission in which the transmission direction is a look-down angle (depression angle), the reflected wave from the road surface is discriminated as invalid based on the propagation delay time, and the signal is judged. output Between the preceding vehicles and a determining means for outputting a signal by determining that the propagation delay time of the reflected wave of a predetermined value or more is invalid when the transmission direction is horizontal and the angle of elevation (elevation angle) is transmitted. Control system.