JPH09162619A - Antenna for receiving proximity warning radio wave from automobile driven for emergency purpose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the structure of the antenna and its mount method to recognize a radio wave incoming direction when a short radio wave is selected for a warning radio wave. SOLUTION: Since it is required to mount an antenna 1 to four faces of a vehicle, the antenna 1 should be configured small and should not occupy a great deal of space. An insulation sheet is sticked onto a radio wave interruption metallic thin plate 2, a metallic plate or a metallic foil tape acting like the antenna 1 is sticked on the sheet, a connection wire is led out, a protection plastic sheet 4 is covered onto them, and the face of the protection plastic sheet 4 is adhered onto an inner face of a window pane. In the case of sticking antenna not to the window but to a metallic face, the antenna 1 not employing the radio wave interruption metallic thin plate 2 may be adhered to an outer metallic face of a vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and an installation method of an antenna for determining the direction of an emergency vehicle by an ordinary vehicle receiving the approach alarm when the emergency vehicle emits an approach warning by radio waves. It belongs to the technical field of antennas.

[0002]

BACKGROUND OF THE INVENTION The present invention relates to a case where an emergency vehicle sends an approach warning by radio waves, and since it has not been realized yet, naturally there is no conventional technique. On the roads recently, cars are often running in a traffic jam. Therefore, the exhaust gas is terribly noisy and the driver is forced to drive with the windows closed. On the other hand, the number of accidents and sudden illnesses is increasing, and the number of emergency vehicles dispatched is extremely high, and the sound of the siren is enough to bother residents of the roadside houses. However, the driver of an important car can not hear because the window is closed, and the operation of the emergency car is often delayed. This is a serious problem for society. Therefore, the inventor of the present application has previously proposed, in Japanese Patent Application No. 6-17461, that an emergency vehicle sends an approach warning by radio waves to each vehicle in the traveling direction. The present invention relates to the antenna of each vehicle on the receiving side in that case. It is considered that short waves are used as the radio waves in that case.

If an emergency vehicle emits a radio-wave approach warning and each vehicle has a simple receiver that emits a warning sound and blinks a lamp with a dedicated receiver for that frequency, it is certain that the approach warning will be received. Is. However, it is unclear from which direction the radio waves came to each vehicle in the traffic jam, that is, from which direction the emergency car came, and when and how to get to the left side of the road, Especially at intersections, it may be difficult to cope. In order to know the direction in which the radio waves came, it is necessary to install direction-finding antennas each equipped with a receiver on the front, rear, left, and right of the vehicle body, but it is too noisy to set up four antennas on the vehicle body. It is expensive and cannot be spread.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple antenna that each vehicle must install to know the direction of transmission when an emergency vehicle issues an approach warning by radio shortwave. To do.

[0005]

[Means for Solving the Problems] An elongated metal plate for antenna or a metal foil tape is attached to one surface of a metal plate for blocking radio waves via an insulating sheet, and a plastic sheet for protection is attached on the metal plate for protection of the antenna. The receiver connecting wire is pulled out from a part of the metal plate or metal foil tape, and when attaching to the window glass, attach the metal plate for antenna or the metal foil tape side to the outside on the inner surface of the glass, When attaching to the metal plate of the vehicle body, attach the metal plate for the antenna or the metal foil tape to the outside of the metal plate. In this case, the blocking metal plate is not always necessary, and the antenna metal plate or the metal foil tape may be directly attached to the vehicle body metal plate portion.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION At present, each vehicle in a row of vehicles on a congested road often has its windows closed, and therefore the approach warning by the sound of the siren of an emergency vehicle is not always heard by the driver. Absent. If it is decided to issue a near-field warning by wireless short-wave in the future as a countermeasure, if each vehicle is equipped with a dedicated antenna and receiver, the driver will always receive it. However, in this case, it is necessary to know the approaching direction of the emergency vehicle.

For that purpose, four sets of antennas and receivers for receiving radio waves coming from the front, rear, left and right directions of the vehicle must be provided. The receiver can be as simple as blinking the buzzer and lamp when receiving, but the antenna must also be simple. That is the structure shown in the previous section. Since the long and narrow metal plate or metal foil tape-shaped antenna alone receives radio waves from its front and rear surfaces, a metal surface is attached to one surface to block the radio waves and the other surface is exposed to radio waves. Install it outside. In order to make it economical, each part is made into a flat thin plate and adhered, and the installation is done with an adhesive tape.

FIG. 1 is a front view in which the antenna of the present invention is attached to the inner surface of an automobile windshield, and FIG. 2 is a side sectional view. The antenna 1 is attached to the radio wave blocking plate 2 by an elongated metal plate or a metal foil tape via an insulating adhesive sheet 3, and a protective plastic sheet 4 is further adhered thereon. When the adhesive or the double-sided adhesive tape 5 is attached to the outer surface of the plastic sheet 4 and attached to the upper portion of the inner surface of the windshield 6, the installation of the antenna 1 is completed. Reference numeral 7 is a connection line to the receiver. FIG. 3 is a side sectional view in the case of being attached to the metal surface of the vehicle body. The installation of the antenna 1 is completed by adhering the protective plastic sheets 4 to both sides of the antenna 1 and adhering it to the vehicle body metal surface 8 with the insulating double-sided adhesive sheet 3.

[0009]

As described above, by using a metal foil for the antenna and adhering it to the vehicle body with an adhesive, the cost of manufacturing and installing the antenna becomes extremely low, which greatly contributes to the radio wave of the approach warning of an emergency vehicle. Will do.

[Brief description of the drawings]

FIG. 1 is a front view in which an antenna of the present invention is attached to the inner surface of an automobile windshield.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a side sectional view in which the antenna of the present invention is attached to the outer surface of an automobile body.

[Signs in the drawings]

 1 Antenna 2 Radio wave blocking plate 3 Adhesive sheet 4 Protective plastic sheet 5 Double-sided adhesive tape 6 Windshield 7 Connection line to receiver 8 Metal surface of car body

Claims (2)

[Claims] 1. When an emergency vehicle uses radio waves for approaching warning, a long thin metal plate or metal foil tape serving as an antenna is attached to one side of a rectangular metal sheet for blocking radio waves via an insulating sheet, and further thereon. A protective plastic sheet is attached to the antenna and the surface of the protective plastic sheet is received. Antenna for receiving an electric wave approach alarm of an emergency vehicle attached to the inside of the window glass of each vehicle. 2. An elongated rectangular metal plate or metal foil tape to be an antenna is attached to an insulating rectangular plastic sheet,
The antenna for receiving a radio wave approach alarm of an emergency vehicle according to claim 1, further comprising a protective plastic sheet adhered thereon, and the back surface of the insulating rectangular plastic sheet is adhered to the outer surface of the outer metal plate of the vehicle.