JPH0562098A - Approach informing device - Google Patents

Abstract

PURPOSE:To provide a device which can surely prevent the collision of two objects approaching the crossing, etc., and to provide an approach informing device with less demand. CONSTITUTION:In-monitoring area invading object detecting sensors S1, S2, ...are provided before the prescribed place of a crossing, etc., and they detect an approach object to invade in the monitoring area with the prescribed place as a center. The invasion information of the approach object into the monitoring area detected by the in-monitoring area invading object detecting sensors S1, S2, ... is inputted to an information receiver 11, and further, guided to a power controller 12. The power controller 12 performs the ON and OFF control of the power supplied to an approach object detector 21 and a signal transmitter 22 based on the invasion information of the approach object in the monitoring area sent from the information receiver 11, and therefore, it is not necessary to maintain the approach object detector 21 with the comparatively large demand in an ON condition always, and as a whole, the demand of the device can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an approach notification device which detects the presence of an object approaching a predetermined location such as an intersection of a road and generates a signal, and in particular, an approach notification improved in power saving. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, a curve mirror has been known as a device which is installed at an intersection or the like on a road with poor visibility so as to prevent collision of vehicles, people, etc. at the intersection.

However, according to this curved mirror, the curved mirror is disposed from another direction depending on the arrangement position of the curved mirror, the positional relationship between the vehicle and the person entering the intersection and the curved mirror, or the optical characteristics of the curved mirror. It may not be possible to confirm the entering vehicle or person, and the conventional curve mirror may be overlooked because it relies only on visual recognition, which may lead to a serious accident such as a collision at an intersection. there were.

Therefore, the present applicant previously filed Japanese Patent Application No. 3-17.
No. 0128 proposes an approach notification device which is attached to a curved mirror or the like and prevents collision of two objects approaching a predetermined location such as an intersection from different directions at the same time.

Now, to briefly describe the configuration, this device is provided at a predetermined location and detects a presence of an object approaching the predetermined location, and a predetermined output according to the detection output of the detection means. When the object such as a vehicle approaches a predetermined location such as an intersection of a road, it is detected by the detection means. According to the detection output, the signal generating means generates a signal to an object such as another vehicle approaching the predetermined location.

[0006]

By the way, in the conventional device as described above, an intersection or the like is constantly monitored, and when an object such as a vehicle approaches, this approach information is generated for an object such as another vehicle. ing. On the other hand, in this case, the detection means for detecting the presence of an object approaching the predetermined location is a sound wave, a light,
A device with relatively large power consumption that utilizes the Doppler effect such as radio waves is adopted. For this reason, the above-mentioned conventional device, which keeps these devices in the ON state at all times, has a problem that the power consumption becomes large.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is a device capable of reliably preventing a collision between two approaching objects at an intersection or the like, and further, power consumption. It is to provide an approach notification device with less traffic.

[0008]

In order to achieve the above object, the present invention provides an approaching object detecting device which is disposed at a predetermined location such as an intersection of a road and detects an approaching object approaching the predetermined location. In an approach notification device including a signal transmission device that generates a signal for another object approaching the predetermined location according to the detection output of the approaching object detection device, the proximity notification apparatus is provided at a predetermined position before the predetermined location, Monitoring centering on the above-mentioned predetermined location An approaching object detection sensor within the monitoring area for detecting an approaching object entering the predetermined area, and an approach approaching the monitoring area based on the output of the approaching object detection sensor within the monitoring area Based on the approach information of the approaching object received by the information receiving apparatus and the approach information of the approaching object received by the information receiving apparatus, the power supply to the approaching object detecting apparatus and the signal transmitting apparatus side is turned on. , And having a power control device for OFF, a.

[0009]

According to the present invention, an approaching object detection sensor in the monitoring area is provided in front of a predetermined location such as an intersection to detect an approaching object that enters the monitoring area centered at the predetermined location.
Then, the approach information of the approaching object into the monitoring area detected by the approaching object detection sensor in the monitoring area is input to the information receiving device and further guided to the power supply control device. Then, the power supply control device turns on and off the power supplied to the approaching object detection device and the signal transmission device based on the approach information of the approaching object sent from the information receiving device.
Take control. Therefore, it is not necessary to keep the approaching object detection device, which consumes a relatively large amount of power, in the ON state at all times, and it is possible to reduce the power consumption of the device as a whole.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In the following description, the case where an intersection is selected as the predetermined location and the approach notification device is installed near the intersection on the road will be described.

FIG. 1 is a block diagram showing the overall construction of an embodiment to which the present invention is applied. First, the configuration will be described. In the approach notification device 50 of the present embodiment, a plurality of sensors (incoming object detection sensors within a predetermined area) S ₁ , S ₂ , ... The power management unit 10 and the notification unit 20 are provided integrally with the curved mirror provided at the intersection of the road, and the signal receiving device 40 provided in the moving object 50 such as a vehicle.

[0012] Here, the sensor S _1, S ₂ · · ·, for example as shown in FIG. 3, A ₁ a predetermined distance short of the intersection A,
Inside the surveillance area W surrounded by straight lines A ₁ A ₂ , A ₃ A ₄ , A ₅ A ₆ , A ₇ A ₈ with _four S _{1 to} S ₄ installed at the positions of A ₃ , A ₅ , and A ₇ . It detects a vehicle or the like entering the vehicle, and photoelectric sensors, ultrasonic sensors, etc. can be used.

Further, the power management unit 10 includes the information receiving device 1
1 and a power supply control device 12, of which the information receiving device 11 receives the detection signals from the sensors S ₁ , S ₂ ... And receives the entry information of the vehicle attempting to enter the monitoring area W. It is a thing.

Further, the power supply control device 12 is connected to the power supply 30, and the power supply supplied to the reporting unit 20 is turned on based on the vehicle entry information into the monitoring area W sent from the information receiving device 11. , OFF control is performed.

Further, the notifying unit 20 includes the approaching object detecting device 2
1 and a signal transmission device 22, of which the approaching object detection device 21 detects an object such as a vehicle approaching the position where the reporting unit 20 is installed. As the approaching object detection device 21, for example, a well-known device that detects an approaching object by utilizing the Doppler effect such as sound waves, light, and radio waves can be used.

Further, the signal transmission device 22 of the notification unit 20 is
Corresponding to the detection output of the approaching object detection device 21, a signal is transmitted to another moving object 50 close to the notification unit 20. Here, as the signal transmitted from the signal transmission device 22, for example, a signal of radio wave, light, sound wave or the like can be used.

The signal receiving device 4 arranged on the moving object 50.
0 receives a signal transmitted from the signal transmission device 22. In addition, the signal receiving device 40 issues a predetermined alarm to the driver of the moving object 50 in response to the signal reception output, and the moving speed of the moving object 50 in order to prevent the collision of the moving object 50. It also controls to decelerate.
The configuration of this embodiment has been described above. Next, the operation will be described.

First, the power management unit 10 and the notification unit 20 shown in FIG. 1 are, for example, the curve mirror 3 arranged at one side of an intersection A where a road 31 and a road 32 shown in FIG. 3 intersect.
4 and the signal receiving device 40 shown in FIG.
Is a vehicle C1 which is a moving object traveling on the roads 31 and 32.
And C2.

The reporting unit 20 disposed on the curve mirror 34
The approaching object detection device 21 (FIG. 1) detects a vehicle approaching the installation position of the curve mirror 34 through the road 31 and a vehicle approaching the installation position of the curve mirror 34 through the road 32. Here, the detection target detected by the approaching object detection device 21 of the notification unit 20 may be a person other than the vehicle.

Here, the approaching object detection device 2 of the notification unit 20
1 is a vehicle C approaching the position where the curve mirror 34 is disposed.
1, C2, etc. are detected, the signal transmission device 2 of the notification unit 20
2 (FIG. 1) is a signal S for vehicles C1 and C2.
1 and S2 are transmitted (see FIG. 4).

Then, for example, the signal receiving device 4 of the vehicle C1
0 receives the signal S1 from the reporting unit 20,
A warning is issued to the driver of No. 1. This alarm is issued, for example, by displaying a lamp or generating an alarm sound.

Further, when the signal receiving device 40 of the vehicle C2 receives the signal S2 from the notification section 20, it also gives an alarm to the driver of the vehicle C2. This warning is also given, for example, by displaying a lamp or generating a warning sound.

As a result, the driver of the vehicle C1 and the vehicle C2 can surely know that there is another vehicle or person approaching the intersection A from the lamp display and the generation of the alarm sound. If the driver of the vehicle performs an operation such as reducing the speed of the vehicle, it is possible to reliably prevent the collision at the intersection at the intersection A.

The above is the operation of the reporting unit 20, but in the present embodiment, the power management unit 10 is further provided to check the entry situation of the vehicle in the direction of the intersection A, and the reporting unit 2 as described above.
When the operation of 0 is unnecessary, the power supply to the notification unit 20 is cut off.

The processing procedure in this case will be described below with reference to FIG. First, the information receiving device 11 of the power management unit 10 detects each sensor S ₁ installed at the entrance of the monitoring area W,
The output information of S ₂ , S ₃ , and S ₄ is constantly monitored, and it is checked whether or not there is a vehicle entering the monitoring area W (step 100).

Here, for example, as shown in FIG.
When both 1 and C2 are outside the monitoring area W (No in step 100), the power supply controller 12 cuts off the supply of the power supply 30 to the notification unit 20 side (step 150).

As a result, the power supply to the approaching object detection device 21 constituting the notification unit 20 is cut off. However, since the approaching object detection device 21 detects a vehicle or the like traveling in the monitoring area W, the monitoring area If no vehicle or the like is detected in W, there is no need to operate. Then, as a result, power saving in the notification unit 20 is achieved.

On the other hand, when a vehicle is detected in the monitoring area W (YES in step 100), it is checked whether or not there is a vehicle approaching at the same time (step 110).
This is to try to turn on the power to the notification unit 20 side only when a vehicle approaching with a possibility of collision is detected even if a vehicle exists in the monitoring area W. For example, in FIG. As shown in the monitoring area W, the vehicle C2
If only this is detected and no vehicles approaching at the same time are detected (No in step 110), the power supply operation is not performed and the process ends.

On the other hand, if there are vehicles approaching at the same time (YES in step 110), it is further checked whether or not the power source 30 is turned on (step 120). N in step 120
When it is determined to be o, the power source 30 is supplied to the notification unit 20 side (step 170) and the operation of the notification unit 20 is executed (step 140).

If the power is already supplied to the notification unit 20 side (YES in step 120), it is checked whether the vehicle in the monitoring area W is moving (step 13).
0) If there is even one moving vehicle (step 13
If YES, the reporting unit 20 is activated. On the other hand, as shown in FIG. 6, even if two vehicles C1 and C2 exist in the monitoring area W, they are all stationary (N in step 130).
O), the scanning interval by the approaching object detection device 21 is widened (step 160). Therefore, also in this case, power saving of the notification unit 20 can be achieved.

[0031]

As described above, according to the present invention, the entering object detection in the surveillance area is provided at a predetermined position before the predetermined location and detects an approaching object that enters the surveillance area centered on the predetermined location. A sensor, an information receiving device that receives the approach information of the approaching object that enters the monitoring area based on the output of the approaching object detection sensor in the monitoring area, and the approach information of the approaching object that is received by the information receiving device. Based on the above, the approaching object detection device and the power supply control device for turning on / off the power supply to the signal transmission device side are provided, so that collision of two approaching objects at an intersection or the like can be reliably prevented and power consumption can be reduced. It is possible to obtain a small number of approach notification devices.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment to which the present invention is applied.

FIG. 2 is a flowchart showing the operation of a power management unit in the embodiment shown in FIG.

FIG. 3 is an explanatory diagram of a monitoring area set near an intersection.

FIG. 4 is an explanatory diagram when an alarm is output to vehicles approaching each other.

FIG. 5 is an explanatory view when only one vehicle is running in the monitoring area.

FIG. 6 is an explanatory diagram when a vehicle in the monitoring area is stationary.

[Explanation of symbols]

S ₁ , S ₂ , ... Sensor (sensor for detecting approaching object in surveillance area) 10 Power management unit 11 Information receiving device 12 Power control device 20 Notification unit 21 Approaching object detection device 22 Signal transmitting device 30 Power supply 40 Signal receiving device 50 Moving object A Intersection C1, C2 Vehicle W Monitoring area

Claims (1)

[Claims] 1. Arranged at a predetermined location such as a road intersection,
An approaching object detection device for detecting an approaching object approaching the predetermined place, and a signal transmission device for generating a signal to another object approaching the predetermined place in response to a detection output of the approaching object detection device are provided. In the approach notification device, an approaching object detection sensor in a monitoring area, which is provided at a predetermined position before the predetermined location and detects an approaching object that enters a predetermined surveillance area centered on the predetermined location, and in the monitoring area An information receiving device that receives the approach information of an approaching object that enters the monitoring area based on the output of the approaching object detection sensor, and the approaching object detection device that is based on the approach information of the approaching object received by the information receiving device. And a power supply control device for turning on and off the power supply to the signal transmission device side.