JP3005866B2 - Car safe driving system - Google Patents

Abstract

PURPOSE:To prevent an accident at a crossing by loading an inter-car distance sensor and a microcomputer and providing a means to raise an alarm when it is judged that approach to the crossing is dangerous. CONSTITUTION:When a car A approaches a crossing 1a, a receiver 21 loaded onto the car A receives the chrominance signal of a signal 2 at the crossing 1a, remaining time until switching the chrominance signal, car speed, the acceleration and deceleration of the car and distance between cars and this information is inputted to a microcomputer 22 so as to judge whether the approach to the crossing 1a in the driving state is dangerous or safe. When the approach is judged dangerous, the alarm is raised to the driver. Thus, the accident at the crossing can be prevented without fail by preventing the signal confirmation miss of driver, the estimation and the error of judgement of the signal switching time and the error of judgement of the car speed and the distance to the crossing or the like.

Description

Description: TECHNICAL FIELD The present invention relates to a safe driving system for an automobile when entering an intersection or the like.

(Prior Art) Conventionally, in a car traveling on a road, a driver visually judges a driving condition by seeing a traffic light installed at an intersection, and operates a brake based on the judgment to apply a brake.

(Problems to be Solved by the Invention) In the above-mentioned prior art, there is only one-way information transmission from a traffic light at an intersection to a driver on a car side, and there is no communication between the traffic light and the driver, and all of the visual information of the driver can be seen. At the intersection, the driver's signal confirmation error, the error in determining the relationship between the signal change time and the vehicle speed, the error in determining the vehicle speed and the distance to the intersection, the error in determining the relationship between the vehicle distance and the vehicle speed, etc. There is a problem that it is the biggest cause of the accident occurrence.

(Means for Solving the Problems) The present invention aims to solve the above problems,
A traffic signal transmitting a red signal, a blue signal, and a yellow signal and a remaining time signal until the signal change of the color signal is arranged at an intersection, and a distance signal indicating a distance to the traffic signal at a predetermined distance from the traffic signal A distance signal transmitter for transmitting the signal, the vehicle receives and detects each of the signals, and when the vehicle reaches a set position, when the detected color signal is a red signal, there is no braking operation; and When the color signal is a yellow signal, based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed of the car,
If it is predicted that it is impossible to enter the intersection in the state of the yellow traffic light, a microcomputer for judging the danger is mounted, an alarm means for issuing an alarm in response to the microcomputer judging the danger, and It is equipped with means to prompt the driver to confirm safety when the traffic light is green,
A traffic signal transmitting a red signal, a blue signal, and a yellow signal and a remaining time signal until the signal change of the color signal is arranged at an intersection, and a distance signal indicating a distance to the traffic signal at a predetermined distance from the traffic signal A distance signal transmitter for transmitting the signal, the vehicle receives and detects each of the signals, and when the vehicle reaches a set position, when the detected color signal is a red signal, there is no braking operation; and When the color signal is a yellow signal, based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed of the car,
If it is predicted that it is impossible to enter the intersection in the state of the yellow traffic light, a microcomputer for judging the danger is mounted, an alarm means for issuing an alarm in response to the microcomputer judging the danger, and The system is characterized in that it comprises means for prompting the driver to confirm safety when the signal is green, and means for activating the automatic brake when the driver does not respond and does not decelerate after the warning.

(Operation) When a car is approaching an intersection, the receiver mounted on the car uses the color signal of the traffic signal at the intersection, the remaining time signal and vehicle speed until the color signal changes, the acceleration / deceleration of the car, the inter-vehicle distance. Is received and input to the microcomputer to judge whether it is dangerous or safe to enter the intersection in the driving state, and if it is judged to be dangerous, an alarm is issued to the driver, and the driver does not perform any braking operation to prevent danger In such a case, an automatic brake is activated to prevent an accident due to a driver's visual error or judgment error when entering an intersection.

Furthermore, when the microcomputer 22 detects a green signal when the vehicle reaches the intersection, the driver displayed to confirm safety is required to confirm safety before passing the intersection very safely. it can.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the overall configuration of an alarm system, in which a traffic signal 2 is installed at an intersection 1a of a road 1 through which a car passes.
The traffic light 2 includes signal lights 3, 4, and 5 of three colors, a transmission unit 6, and a transmission antenna 7, and a remaining time color signal corresponding to the signal color is transmitted from the transmission unit 6 through the antenna 7.

Distance signal transmitters 8 and 9 are installed at two points before the traffic signal 2, for example, at points L1 and L2 from the traffic signal 2. Transmitters 8 and 9 are transmitting units 10 and 11 and transmitting antenna
A distance signal indicating a distance is transmitted from the transmission units 10 and 11 through the antennas 12 and 13.

As shown in FIG. 2, the transmitting section 6 of the traffic light 2 includes an oscillation circuit.
14, a modulation circuit 15, a transmission circuit 16, a clock circuit 17, a signal remaining time measurement circuit 18, and these power supply circuits 19, and the output of the transmission circuit 16 is output as a radio signal through the antenna 7. The configuration itself of the transmission unit 6 is publicly known, and the transmission units 10 and 11 of the distance signal transmitters 8 and 9 are similarly configured. The clock circuit 17 sets the time interval of the transmission signal. Then, the traffic light 2 and the two distance signal transmitters 8, 9
The transmitting units 6, 10, 11 are configured to transmit signals at mutually different time intervals so that each signal can be distinguished. Note that these transmitting units 6, 10, and 11 may be configured to provide a difference in each transmitting frequency so that each transmitting signal can be determined.

As shown in FIG. 3, the vehicle A has an inter-vehicle distance measuring device.
20, a signal receiving device 21, a microcomputer 22, a display device 23, a synthesized voice generating device 24, a signal remaining time measuring device 27, and a speaker 25 are mounted. The microcomputer 22 constitutes a state judging means, and comprises a display device.
23, the synthesized voice generating device 24 and the speaker 25 constitute an alarm output unit.

The inter-vehicle distance measuring device 20 measures the distance between the own vehicle and the preceding vehicle by measuring the time until a transmitted signal is reflected and returned, such as a commonly used radar, for example. . The signal remaining time measuring device is, for example,
After receiving the transmitted signal from the traffic light, the remaining time can be counted and measured by a timer, a counter or the like.

As shown in FIG. 4, the signal receiving device 21 is a receiving antenna.
26, a receiving circuit 28, a signal determining circuit 29, a position determining circuit 30, a signal remaining time measuring circuit 31,
It consists of 32. The receiving device 21 receives the radio signals from the signal 2 and the distance signal transmitters 8 and 9 via the antenna 26, the signal discriminating circuit 29 discriminates the signal color from the color signal, and the position discriminating circuit 30 detects the signal color from the distance signal. The signal remaining time measuring circuit 31 measures the remaining time until the signal is switched. Then, these discriminating circuits 29, 3
0, the output of the signal remaining time measurement circuit 31 is input to the microcomputer 22.

Although not shown, the vehicle 19 is provided with a known vehicle speed detector for detecting the vehicle speed, and its output is also input to the microcomputer 22.

Next, the safe driving system of the present invention will be described in detail with reference to the flowchart shown in FIG.

When the power is turned on, first, an initial setting is performed, and a color signal transmitted from the transmitting antenna 7 of the traffic light 2 at the intersection,
Remaining time signal and distance signal until the color signal changes
The distance signal to the intersection transmitted from the transmitting antennas 8 and 9 is received by the receiving device 21 of the vehicle heading for the intersection, and these signals and the vehicle speed, the inter-vehicle distance, and the acceleration / deceleration signal of the vehicle are received by the receiving device 21. Of the microcomputer 22.

When the car approaches an intersection or reaches a set position, the microcomputer 22 detects a red light, and if there is no braking operation, an alarm is issued by the speaker 25 and the display device 23, and if there is no further braking operation, , The automatic brakes are activated and stop approaching the intersection. When the microcomputer 22 detects a yellow signal, the microcomputer 22 calculates the remaining time of the signal, the distance to the intersection, the vehicle speed, the distance between vehicles, and the acceleration / deceleration of the vehicle.
Comprehensively calculates and judges whether it is dangerous or safe to enter the intersection in that driving state, and if it is dangerous, issues a warning to the driver with the speaker 25 and at the same time displays
Display on 23 and inform driver. If the driver does not perform any braking operations to prevent danger, the automatic brakes are activated to stop entry to the intersection and protect the vehicle from accidents at the intersection.

When the microcomputer 22 detects a green signal when the vehicle reaches the intersection and reaches the set position, it is displayed to confirm the safety, and the driver can confirm the safety and can pass through the intersection very safely.

The distance signals 8, 9 are not limited to two places, but may be installed at many places.

(Effects) According to the present invention, a traffic signal transmitting a three-color signal of red, blue, and yellow and a remaining time signal until a signal change of the color signal is arranged at an intersection, and a point at a predetermined distance from the traffic signal A distance signal transmitter for transmitting a distance signal indicating the distance to the traffic light is provided, and each of the signals is received and detected in the vehicle, and when the detected color signal is a red signal when the vehicle comes to a set position. When there is no braking operation, and when the detected color signal is a yellow signal, the vehicle cannot enter the intersection with the yellow signal based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed. If it is predicted, a microcomputer for judging danger is mounted, alarm means for issuing an alarm in response to the microcomputer judging danger, and a safety confirmation to the driver when the color signal is blue. It is noted that A traffic signal transmitting three color signals of red, blue, and yellow and a remaining time signal until a signal change of the color signal is disposed at an intersection, and a distance from the traffic signal to a predetermined distance indicates a distance to the traffic signal. A distance signal transmitter for transmitting a distance signal is provided, the vehicle receives and detects each of the signals, and when the detected color signal is a red signal when the vehicle comes to a set position, there is no braking operation, and If the detected color signal is a yellow signal and it is predicted that it is impossible to enter the intersection in the state of the yellow signal based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed based on the vehicle speed, it is dangerous. It is equipped with a microcomputer that determines that the microcomputer, warning means that issues an alarm in response to the microcomputer has determined that there is a danger, and a means that prompts the driver to confirm safety when the color signal is blue,
If there is no response from the driver after the warning and the vehicle is not decelerated, there is a means to activate the automatic brake, so the driver's signal confirmation error at the time of entering the intersection, the signal switching time prediction error and the vehicle speed and the distance to the intersection are judged. Mistakes can be prevented, and accidents at intersections can be reliably prevented.

Furthermore, when the microcomputer 22 detects a green signal when the vehicle reaches the intersection, it displays a message to confirm safety, and the driver confirms the safety and can pass the intersection very safely. it can.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an automobile warning system showing an embodiment of the present invention, FIG. 2 is an electric block diagram showing a transmission section of a traffic signal, and FIG. 3 is an electric diagram showing a part of an alarm system provided in the automobile. FIG. 4 is an electric block diagram showing a signal receiving apparatus, and FIG. 5 is a flowchart showing an example of processing by a microcomputer. 1 ... road, 1a ... intersection 3,4,5 ... signal light, 6 ... transmission unit 7 ... transmission antenna, 8,9 ... distance signal transmitter 10,11 ... transmission unit, 12, 13 ... ... Transmitting antenna A ... Car, 21 ... Signal receiving device 22 ... Microcomputer, 23 ... Display device 24 ... Synthesized voice generator, 25 ... Speaker

Claims (2)

(57) [Claims] 1. A traffic signal for transmitting three color signals of red, blue, and yellow and a remaining time signal until a signal change of the color signal is disposed at an intersection, and a signal from the traffic signal to a point at a predetermined distance from the traffic signal. A distance signal transmitter for transmitting a distance signal indicating a distance is provided, and the vehicle receives and detects each of the signals. When the detected color signal is a red signal when the vehicle reaches a set position, there is no braking operation. And, when the detected color signal is a yellow signal, based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed, it is predicted that the vehicle cannot enter the intersection in the state of the yellow signal. Equipped with a microcomputer for judging the danger, alarm means for issuing an alarm in response to the microcomputer judging the danger, and means for urging the driver to confirm safety when the color signal is blue. Characterized by the fact that The entire operating system. 2. A traffic signal for transmitting three color signals of red, blue, and yellow and a remaining time signal until a signal change of the color signal is disposed at an intersection, and a signal from the traffic signal to a point at a predetermined distance from the traffic signal. A distance signal transmitter for transmitting a distance signal indicating a distance is provided, and the vehicle receives and detects each of the signals. When the detected color signal is a red signal when the vehicle reaches a set position, there is no braking operation. And, when the detected color signal is a yellow signal, based on the remaining time of the yellow signal, the distance to the intersection, and the vehicle speed, it is predicted that the vehicle cannot enter the intersection in the state of the yellow signal. Is equipped with a microcomputer that determines that there is a danger, alarm means that issues an alarm in response to the microcomputer has determined that danger, and means that prompts the driver to confirm safety when the color signal is blue, No driver response after alarm If not fast, safe driving system of a motor vehicle, characterized in that it comprises means for actuating the automatic brake.