JPH03288300A - Alarming device - Google Patents

Abstract

PURPOSE:To precisely perceive th existence of an approaching vehicle and the degree of danger with a driver and pedestrians by detecting the existence of the approaching vehicle and vehicle speed as information by a detector using a Doppler radar, exchanging the detected information mutually between respective alarming devices and executing alarm display in an alarm display part. CONSTITUTION:An electric wave emitted from an alarming device 1a is reflected on a vehicle and enters into a detector 2a. The reflected wave received by the detector 2a of which proceeding direction and vehicle speed are calculated by an arithmetic circuit with using a Doppler effect that frequency changes by the relative speed is transmitted to an alarming device 1b by an information transmitting/receiving device 4. In the alarming device 1b, alarm display is executed to an alarm display part 5b based on the transmitted information. The alarm display is executed to an alarm display part 5a also on the vehicle approaching to the alarming device 1b in the same way. Thus, respective drivers can perceive the existence of the approaching vehicle on an opposite lane and the degree of danger precisely in advance with confirming the alarm display part 5a or 5b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a warning device, and more particularly to a warning device installed on a road with poor visibility to notify drivers and pedestrians of the approach of a vehicle.

[Conventional technology] For example, on winding roads near mountains or intersections with buildings in urban areas, it is difficult for drivers and pedestrians to confirm the presence of approaching vehicles, and there is a high risk of accidents occurring. .

Therefore, conventionally, roads with poor visibility like this were
We are working to ensure the safety of drivers and pedestrians by installing curved mirrors and vehicle detectors using tape switches and hose switches.

[Problem to be solved by the invention] As mentioned above, conventionally curved mirrors and vehicle detectors using tape switches and hose switches have been installed on roads with poor visibility, but curved mirrors The effective confirmation range is limited, and furthermore, there is a risk of errors in judgment, such as difficulty in distinguishing between an approaching vehicle and a vehicle driving away.

Additionally, vehicle detectors using tape switches or hose switches have short mechanical lifespans, making them unsuitable for practical use as devices installed on roads.

The present invention has been made to solve this problem, and its purpose is to provide a warning device that allows drivers and pedestrians to accurately know the presence of approaching vehicles and the degree of danger.

[Means for Solving the Problems] An alarm device according to the present invention detects the presence of an approaching vehicle and its vehicle speed as information using a detector using Doppler radar, and mutually exchanges detection information between each alarm device. Accordingly, an alarm is displayed on the alarm display section.

[Operation] The alarm device according to the present invention detects the presence of an approaching vehicle and its speed as information using a detector using Doppler radar, and each alarm device mutually exchanges the detected information to display the alarm on the alarm display section. Since we decided to display a warning,
This makes it possible to detect approaching vehicles from any location, including the level of danger, to drivers and pedestrians.

[Example] An example of the present invention will be described below with reference to the drawings. Fig. 1 is a block diagram showing the configuration of an alarm device that is an embodiment of the present invention, Fig. 2 is a perspective view showing the external appearance of the tank bottom, and Figs. 3 and 4 are views showing installation examples, respectively. be. In each figure, (la) and (lb) respectively indicate the entire alarm device, and when collectively referred to as the alarm device (1>).(2a
) and (2b) are Doppler radar type detectors, (
3) is an arithmetic circuit, (4) is a transmitting/receiving device, (5a), (
5b) is an alarm display section, and (6) is an external alarm display section.

Note that this embodiment shows an alarm device in which the alarm sending side and the alarm receiving side are provided in the same housing, but as will be described later, the alarm sending side and the alarm receiving side may be separate devices and separated. It may also be installed.

Next, the operation will be explained. For example, as shown in FIG. 3, assume that the warning devices (la) and (lb) are installed apart from each other on the opposite lane on a winding road near a mountain with poor visibility.

Radio waves are emitted onto the road from the alarm device (1a), and when a vehicle is present on the road as shown in the figure, the radio waves are reflected by this vehicle and the reflected waves enter the detector (2a). Using the Doppler effect, in which the frequency of the reflected waves received by the detector (2a) changes depending on the relative speed, the arithmetic circuit (3) calculates the traveling direction and vehicle speed, and detects when the detected vehicle is approaching. In the case of a vehicle coming to
4> is sent to the alarm device (1b). Alarm device (1
In b>, the alarm display section (
5b>, for example, as shown in Figure 2, "the oncoming vehicle is speeding at 5
A warning display such as "Approaching at 0 km/h" is displayed.

Similarly, an alarm is displayed on the alarm display section (5a) for a vehicle approaching the alarm device (lb). Therefore, each driver can use the alarm display section (5a) or (5b).
), it is possible to accurately detect the presence and danger level of vehicles approaching on the oncoming lane in advance. In this case, information is exchanged between the alarm devices (1a) and (1b) using electrical signals, and each alarm device (1a) can be placed at any point.
la) and (lb) can be installed, making it possible for each driver to detect danger well in advance.

Also, based on the phase of the Doppler signal, it is possible to warn only about approaching vehicles, and since the vehicle speed can also be displayed, it is possible to notify the driver of the danger level as well.

As shown in Figure 4, in places where there is a T-junction with poor visibility that is obstructed by a road survey or a building, a warning system W (1) that has a mutual information exchange function may be used, even if it is not the alarm system that sends the alarm. By installing an external alarm display section (6) consisting of an alarm device (L) at the bottom of the tank and an alarm receiving side that simply displays information from the alarm device position, economical alarm display can be performed. I can do it.

FIG. 5 is a block diagram showing another embodiment of the present invention. In this embodiment, each alarm device (10a), (10b) is provided with a comparison alarm circuit (7), and the calculation circuit (3) calculates the If the vehicle speed exceeds a predetermined vehicle speed, such as the legal speed limit, a special warning display is displayed on the own warning display unit (5) to prompt the driver, or a connected external warning display A special warning display is also displayed on the warning device at the destination (6) and the destination, so that drivers and pedestrians can receive more accurate information.

In the above embodiment, a wireless transmitter/receiver is used as the transmitter/receiver (4>), but the same implementation is possible using a wired transmitter/receiver.

[Effects of the Invention] As explained above, the present invention detects the presence of an approaching vehicle and its speed as information using a detector using Doppler radar, and mutually exchanges the detected information between each alarm device. Since a warning is displayed on the warning display section, drivers and pedestrians can be alerted to only approaching vehicles from any point, including the level of danger, providing safer road operation facilities. It has the effect of being able to

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a perspective view showing the external configuration of the alarm device in this embodiment, Figs. FIG. 5 is a diagram showing another embodiment of the present invention. In each figure, (1), (la), (lb), (
10a) and (10b) are alarm devices, (2a)
), (2b) are detectors, (3) are arithmetic circuits, (
4> is a transmitting/receiving device, <5a). (5b) is an alarm display section, and (6) is an external alarm display section. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A detector and an arithmetic circuit for detecting the presence and traveling direction of a vehicle traveling on a road and calculating the speed of the vehicle using a Doppler radar system on the alarm transmitting side; If the direction of travel of the vehicle is in the approaching direction, the system is equipped with a transmitting device that transmits that information and vehicle speed as alarm information to other alarm devices, and the alarm receiving side has a receiving device that receives alarm information transmitted from other alarm transmitting sides. An alarm device comprising: a device; and an alarm display unit that displays received alarm information.