JPH05227065A - Road information transmitting device - Google Patents

Abstract

PURPOSE:To accurately know multiple information. CONSTITUTION:The system consists of a voice output section 5 outputting various information in land management centers 1 and 3, a modulation section 7 modulating an AC signal from the section 5 into the prescribed frequency, an output section 9 amplifying the signal from the section 7 to be outputted as a magnetic field, and a signal cable 15 electrically connected with the section 9 and provided on the surface of a road 19. A leakage section 21 generating the magnetic field of signals modulated by an output section 9 toward the surface of a road 19 is provided on the signal cable 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface information transmitting device for outputting various audio signals as magnetic fields from a signal cable laid in a road surface.

[0002]

2. Description of the Related Art Conventionally, for example, cable broadcasting is known as a means for providing various information to passersby.

In wired broadcasting, speakers connected by wires are arranged at a predetermined interval, and audio information from a ground station is made to flow through the speakers.

[0004]

As described above, since cable broadcasting provides information to an unspecified number of people, information can be received by as many people as possible over a wide range. It is an unsuitable means when information is provided only to a specific person who guides to. Moreover, for a person who does not need it, it becomes a kind of noise because the information cannot be cut off or the like cannot be selected. As described above, since the range of information is for the general public, there is an inconvenience that the information cannot be provided only to a person who wants the information or a specific person. Also, there is a problem that different information cannot be sent from the same position because of the voice.

In view of this, the present invention is a road surface information transmitting device in which information is given only to a person who wants the information, and even if a plurality of information is sent, there is no adverse effect. It is intended to be provided in detail.

[0006]

In order to achieve the above object, the present invention provides a voice output section which is provided in a ground control center and outputs various kinds of information at a specific frequency, and a frequency from the voice output section. A modulation unit for modulating the frequency of the signal, an output unit for amplifying and outputting the modulated AC signal, and a signal cable electrically connected to the output unit and laid on the road surface. A leaking portion is provided for emitting a modulated AC signal from the output portion onto the road surface as a magnetic field.

[0007]

According to such a road surface information transmitting device, the information sent from the ground control center is emitted on the road surface as a magnetic field in a narrow area from the leak portion of the signal cable laid on the road surface.

[0008] Therefore, when the person who wants the information enters the information providing area, he / she can switch on the commercially available portable radio that he / she brings and tune it to the frequency providing the information, so that only the person himself / herself can obtain the information Can be obtained. Moreover, a plurality of pieces of information can be emitted by using a plurality of frequencies and signal cables, and information can be reliably obtained without interference by changing the radio channel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings of FIGS.

In the figure, 1 is a central ground management center, and 3 is an individual management center connected to the central ground management center 1 by a telephone line or radio waves.

The management centers 1 and 3 have a voice output section 5 and
It has a modulation section 7 and an excitation output section 9.

The audio output unit 5 independently collects various kinds of information such as shopping information of department stores and the like, public information, guide information, etc. on a tape and outputs the information to the modulator 7.

The modulation unit 7 outputs a signal from the local oscillator 11 to a frequency other than the frequency used by the existing AM station within the range of 53 to 162 × 10 kHz which can be heard by the commercially available portable radio 13, for example. It functions to perform amplitude modulation (AM). In this case, frequency modulation (FM) is also possible.

The excitation output unit 9 is connected to the signal cable 15 and has an amplification circuit for amplifying the modulated AC signal from the modulation unit 7 to a predetermined level, and an amplitude modulation wave containing a voice modulation AC signal. Is output as a magnetic field.

The signal cable 15 is a commercially available leaky coaxial cable composed of a central conductor, an outer conductor, and an insulator. As shown in FIG. 2, the sidewalks, intersections, and roads around the building 17 such as a department store are used. It is laid on the road surface 19 of.

Each of the signal cables 15 is a dedicated cable for providing one piece of information, and a plurality of signal cables 15 are arranged as needed, and a leakage portion 21 formed in a coil shape is provided over a predetermined area. .

The area of the leaking portion 21 becomes an information providing area, and as shown in FIG. 1, a magnetic field in a small area which becomes an amplitude modulation wave is generated on the road surface 19 by the AC signal flowing through the outer coil. In this case, it is desirable to display what kind of information can be obtained, information content, frequency, etc. by means of a sign or the like so that a general person can understand.

The commercially available portable radio 13 has AM, F
It is possible to receive M.

According to the road surface information transmitting device thus configured, the information sent from the management center 3 is the road surface 1
The magnetic field in a small area is emitted from the leaking portion 21 of the signal cable 15 laid inside the vehicle 9 on the road surface 19.

Therefore, for those who want information, when they enter the information providing area, they switch on the portable radio 13 they are bringing to match the frequency providing the information, for example, shopping information at a department store. Necessary information such as road information and road information can be accurately obtained.

Therefore, by adjusting the frequencies, a plurality of pieces of information can be reliably obtained without interference. Moreover, since it does not propagate as far as radio waves, it does not bother people who do not need information.

In this embodiment, the means for laying the signal cable 15 on the road or the like has been described, but the same effect can be expected when the signal cable 15 is installed in a park, a museum, an event hall or the like.

[0023]

As described above, according to the road surface information transmitting device of the present invention, a plurality of pieces of information can be accurately known even if a commercially available radio is carried. Moreover, since the information is output as a magnetic field, the information area can be set small, and there is no annoyance to those who do not need the information. Therefore, it can be widely applied to pedestrian crossing information, area information, emergency evacuation guidance, voice guidance for the visually impaired and the like.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a road surface information transmission device according to the present invention.

FIG. 2 is a schematic explanatory diagram of the whole in which a road surface information transmission device is laid.

[Explanation of symbols]

 1,3 Ground management center 5 Audio output section 7 Modulation section 9 Excitation output section 15 Signal cable 19 Road surface 21 Leakage section

Claims (1)

[Claims] 1. A voice output section provided in a ground control center for outputting various information at a specific frequency, a modulation section for modulating the frequency from the voice output section to a predetermined frequency, and an amplified modulated AC signal. And a signal cable electrically connected to the output section and laid in the road surface, the signal cable emitting the modulated AC signal from the output section as a magnetic field on the road surface. A road surface information transmitting device, characterized in that a leakage portion is provided.