JP2002183899A - On-vehicle type vehicle speed monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equip an on-vehicle type vehicle speed monitor without installing a radar device separately. SOLUTION: This on-vehicle type vehicle speed monitor is so constituted that an on-vehicle sensor equipped in a vehicle for detecting an obstacle in front of the vehicle and preventing the collision with the preceding car is set to the radar device and necessary information is extracted from information from the on-vehicle sensor by a monitor vehicle detecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle type vehicle speed monitoring device which is mounted on a vehicle and monitors the speed of a vehicle traveling on a road.

[0002]

2. Description of the Related Art A radar device used in a conventional vehicle-mounted vehicle speed monitoring device is unique to the device, and is usually installed at the center of a linear warning light mounted on the roof of a vehicle. I was

FIG. 6 shows a conventional on-vehicle type vehicle speed monitoring device, wherein 1 is a vehicle, 2 is a rotating light, 3 is a radar device,
Reference numeral 4 denotes a processing unit, and reference numeral 5 denotes a vehicle speed detection unit.

FIG. 7 is a diagram showing the relationship between a conventional on-vehicle type vehicle speed monitoring device and a target vehicle whose speed is to be monitored. Reference numeral 6 denotes a monitoring target vehicle. is there.

Next, the operation of the conventional vehicle-mounted vehicle speed monitoring device will be described. 6 and 7, when a radio wave emitted from the radar device 3 of the on-vehicle type vehicle speed monitoring device irradiates the monitoring target vehicle 6 in front of the vehicle 1, it corresponds to the relative speed between the vehicle 1 and the monitoring target vehicle 6. The detected Doppler frequency is detected by the radar device 3, and the absolute speed of the monitoring target vehicle 6 is calculated from the traveling speed of the vehicle 1 detected by the own vehicle speed detection unit 5. The calculated speed of the preceding vehicle is displayed on the processing unit 4 to monitor the speed of the vehicle.

FIG. 8 is a diagram showing a linear warning light before a radar device of a conventional vehicle-mounted vehicle speed monitoring device is installed.
1 is a vehicle, 2 is a rotating light, 8 is a speaker, and 9 is a linear warning light composed of the rotating light 2 and the speaker 8.

FIGS. 9 (a) and 9 (b) are views showing the state of installation of a radar device in a conventional vehicle-mounted vehicle speed monitoring device. FIG. 9 (a) is a front view and FIG. 9 (b) is a top view. In the figure, 1 is a vehicle, 2 is a rotating light, 3 is a radar device, and 9 is a linear warning light composed of rotating lights 2 on both sides.

[0008]

As described above, in the conventional vehicle-mounted vehicle speed monitoring device, it is necessary to separately install radar units in the vehicle in order to equip the vehicle-mounted vehicle speed monitoring device. In addition, the radar device is usually located between the linear warning lights, and the speaker device, which is provided as a standard feature of the linear warning light, is removed to install the radar device. However, the mainstream flashlight has been changed from a straight type to a boomerang type, and when a vehicle is purchased, a boomerang type flashlight is equipped as standard. Therefore, when installing a vehicle-mounted vehicle speed monitoring device in a vehicle, it was necessary to remove the standard boomerang-type warning light and replace it with a straight-type warning light, which required unnecessary expenses. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. When a vehicle-mounted vehicle speed monitoring device is provided, a dedicated radar device is not prepared but originally installed in a vehicle. The on-board sensor installed on the vehicle is used as a radar device for the purpose of detecting obstacles ahead of the vehicle and preventing collision with the preceding vehicle, and detects the target vehicle for speed monitoring from multiple vehicles detected by the on-board sensor The purpose is to do.

[0010]

According to a first aspect of the present invention, there is provided an on-vehicle type vehicle speed monitoring device provided on a front surface of a vehicle, having an antenna beam in a vehicle width direction, and scanning the antenna beam in the vehicle width direction. A vehicle-mounted sensor that detects a plurality of vehicles traveling in front of the vehicle and obtains speed, angle, and distance information of each vehicle, and a monitoring vehicle detection unit that detects a target vehicle for speed monitoring from an output of the vehicle-mounted sensor. It was done.

According to a second aspect of the present invention, there is provided an on-vehicle vehicle speed monitoring apparatus.
A self-vehicle speed detection device for detecting the speed of the own vehicle, and a speed monitoring device processing unit for calculating the absolute speed of the detected speed monitoring target vehicle from the outputs of the self-vehicle speed detection device and the monitoring vehicle detection unit. It was done.

According to a third aspect of the present invention, there is provided an on-vehicle vehicle speed monitor.
The monitoring vehicle detection unit is provided with a function of setting a vehicle having the highest speed as a target vehicle for speed monitoring among a plurality of vehicles traveling ahead of the own vehicle.

According to a fourth aspect of the present invention, there is provided an on-vehicle type vehicle speed monitoring apparatus.
The antenna beam is formed as a narrow beam.

According to a fifth aspect of the present invention, there is provided an on-vehicle type vehicle speed monitoring apparatus.
The vehicle-mounted sensor is attached to a hood or a bumper.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is an overall view showing Embodiment 1 of the present invention, in which 1 is a vehicle, 4 is a processing unit, 5 is a vehicle speed detection unit, 10 is a boomerang-type alarm light,
Reference numeral 11 denotes an on-vehicle sensor attached to a front surface of the vehicle, for example, a bumper or a hood, and 12 denotes a monitoring vehicle detection unit.

FIG. 2 shows a vehicle-mounted sensor 11 according to the present invention.
FIG. 2 is a view showing a state where the vehicle is mounted on the vehicle 1.
In the figure, 1 is a vehicle, and 11 is a vehicle-mounted sensor mounted on a bumper of the vehicle.

FIG. 3 is a view showing a warning light attached to the roof of the vehicle 1 according to the present invention.
Is a front view, and (b) is a top view. In the figure, reference numeral 1 denotes a vehicle, and 10 denotes a boomerang warning light.

FIG. 4 is a diagram showing the relationship between the on-vehicle type vehicle speed monitoring apparatus according to the present invention and the target vehicle for which the speed is to be monitored. It is a non-monitored vehicle.

FIG. 5 shows the configuration of the monitoring vehicle detection unit 12, which obtains angle information, distance information, and speed information of a plurality of vehicles received from the on-vehicle sensor 11, and obtains speed information, lane information of the monitored vehicle. , And transmits the distance information to the processing unit 4.

Next, the operation will be described. 1, 4,
In FIG. 5, a radio wave emitted from the vehicle-mounted sensor 11 is
A plurality of vehicles traveling in front of the vehicle 1 are irradiated.
Here, a case where the monitored vehicle 6 and the non-monitored vehicle 13 are present is shown. The on-vehicle sensor 11 has a narrow antenna beam in the vehicle width direction, and scans the narrow beam in the vehicle width direction to capture a plurality of targets. Speed information, angle information, and distance information are obtained for each of the plurality of vehicles.

The monitored vehicle 6 and the non-monitored vehicle 13 are the monitored vehicle 6 that is to monitor a high-speed vehicle, and the non-monitored vehicle 13 is a low-speed vehicle.
The information on the plurality of vehicles is input to the monitoring vehicle detection unit 12, and the monitoring vehicle detection unit 12 has a maximum speed vehicle determination unit 12a that selects the vehicle with the highest speed.

Further, a monitoring speed threshold is input from the processing unit 4 to the specific vehicle speed verification unit 12b of the monitoring vehicle detection unit 12, and it is determined whether the speed of the vehicle selected by the maximum speed vehicle determination unit 12a is higher than this threshold. Verify and discard the data if less than the threshold. If it is equal to or more than the threshold, the speed information, the lane information, and the distance information are transmitted to the processing unit 4 as the monitoring target vehicle.

The lane is determined by calculating the distance deviated laterally with respect to the vehicle 1 from the angle information and the distance information from the on-board sensor 11 using a trigonometric function, and setting the width of one lane to 3.5.
The lane in which the monitored vehicle exists is determined as m. The speed, lane and distance of the monitored vehicle are displayed on the processing unit 4 to monitor the speed of the vehicle.

[0024]

According to the present invention, an on-vehicle sensor installed on a vehicle for the purpose of detecting an obstacle in front of the vehicle and preventing collision with a preceding vehicle is used as a radar device, and is usually installed on the roof of the vehicle. This has the effect of eliminating the need for a radar device. Further, there is an effect that the on-vehicle type vehicle speed monitoring device can be equipped with the boomerang-type warning light, which is provided as standard on the vehicle.

[Brief description of the drawings]

FIG. 1 is an overall view showing a first embodiment of a vehicle-mounted vehicle speed monitoring device according to the present invention.

FIG. 2 is a diagram showing a vehicle mounting position of a vehicle-mounted sensor in the vehicle-mounted vehicle speed monitoring device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a state in which a warning light is attached to the vehicle in the vehicle-mounted vehicle speed monitoring device according to the first embodiment of the present invention;

FIG. 4 is a diagram showing a situation in which the speed of a target vehicle is monitored in the on-vehicle type vehicle speed monitoring device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a monitored vehicle detection unit in the first embodiment of the vehicle-mounted vehicle speed monitoring device according to the present invention.

FIG. 6 is an overall view showing a conventional vehicle-mounted vehicle speed monitoring device.

FIG. 7 is a diagram showing a situation in which the speed of a target vehicle is monitored in a conventional vehicle-mounted vehicle speed monitoring device.

FIG. 8 is a view showing a state in which a warning light is mounted on a vehicle before a radar device is installed in a conventional vehicle-mounted vehicle speed monitoring device.

FIG. 9 is a diagram showing a state in which a radar device is mounted on a vehicle in a conventional vehicle-mounted vehicle speed monitoring device.

[Explanation of symbols]

Reference Signs List 1 vehicle, 2 linear warning light, 3 radar device, 4 processing unit, 5 own vehicle speed detecting unit, 6 monitored vehicle, 9 linear warning light, 10 boomerang warning light, 11 on-board sensor, 12 monitoring Vehicle detection unit, 13 Non-monitoring target vehicle.

Claims (5)

[Claims] 1. A vehicle provided in front of a vehicle, having an antenna beam in a vehicle width direction, scanning the antenna beam in the vehicle width direction to detect a plurality of vehicles traveling in front of the own vehicle, and detecting each vehicle. An on-vehicle type vehicle speed monitoring device comprising: an on-vehicle sensor that obtains speed, angle, and distance information; and a monitoring vehicle detection unit that detects a target vehicle for speed monitoring from an output of the on-vehicle sensor. 2. A vehicle speed detecting device for detecting a speed of the vehicle, and a speed monitoring device for calculating an absolute speed of the detected speed monitoring target vehicle from outputs of the vehicle speed detecting device and a monitoring vehicle detecting unit. The on-vehicle type vehicle speed monitoring device according to claim 1, further comprising a processing unit. 3. The on-vehicle vehicle according to claim 1, wherein the monitoring vehicle detection unit sets a vehicle having a maximum speed as a target vehicle for speed monitoring among a plurality of vehicles traveling in front of the own vehicle. Type vehicle speed monitoring device. 4. The on-vehicle vehicle speed monitoring device according to claim 1, wherein said antenna beam is a narrow beam. 5. The on-vehicle type vehicle speed monitoring device according to claim 1, wherein the on-vehicle sensor is mounted on a hood or a bumper.