JPH09328725A - Blind person guide embedded sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a blind person safely by performing fixed magnetization in most parts of synthetic resin sheets having specific wall thickness and providing a special magnetized part which is magnetized in special manner at a position other than the most parts thereof to provide a magnetic field which can be detected by a detector stick. SOLUTION: A blind person guide embedded sheet X which has thickness of 20 micron or more and is made of polyethylene resin in which powders of magnetic material such as ferrite are mixed is formed. The sheet X is arranged along a road, and special magnetization is done at a right turn point, a left turn point, and a crossing with respect to the direction of advance to provide special magnetized parts. Moreover, fixed magnetization which allows the judgement of straight going property continuously is performed in the other most straight going parts of the sheet X. Furthermore, the sheet X is embedded in the ground. A blind person 2 walks by using a stick with detector 1 which has a detector 1a which transmits and receives radio waves having specific frequency and detects a characteristic magnetic field of the sheet X along the sheet X.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a person who has low vision or is blind and buried in the ground and uses a walking stick with a detector to detect the course and attention. The present invention relates to a blind guide buried sheet which gives instructions and substitutes and assists a Braille block.

[0002]

2. Description of the Related Art Conventionally, Braille blocks have been laid on roads and sidewalks for people with low vision or blindness. This has a role of giving a course and cautionary information by searching for unevenness on the surface with a cane or the like, and helping to pass safely.

[0003]

However, the above-mentioned Braille block has a problem that the unevenness of the surface is easily mixed with the unevenness of the portion other than the Braille block, and there is a risk that the path may be deviated by the illusion of the hand holding the cane. . Further, since the cane is brought into direct contact with the unevenness, there is a problem that the tip of the cane is damaged or tripped.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a synthetic resin sheet mixed with a powder of a magnetic material, most of which is uniformly magnetized and has a predetermined important property. Special magnetisation is applied to the parts that correspond to the corners of the road, such as the bends of the road, the junctions, etc., buried in the ground,
It is designed to reflect radio waves of a specific frequency emitted from a separate walking stick with a detector and to form a characteristic magnetic field. Thus, by detecting the radio wave of a specific frequency and a magnetic field having a characteristic from the ground with the separate wand with a detector, information on a straight ahead, a right turn, a left turn, an intersection, etc. is given to a person having a wand with a detector, The person can be safely and reliably guided without damaging the tip of the cane.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The blind guiding embedded sheet according to the present invention is a blind guiding embedded sheet which is buried in the ground and serves as a substitute or auxiliary for a braille block, and is made by mixing a powder of a magnetic material. A fixed magnet is applied to a large part of a flexible magnetizable synthetic resin sheet with a thickness of more than a micron and flexible, and a special magnetized part specially magnetized is provided at a predetermined position other than this large part. In the vicinity of this special magnetized part, a specific magnetic field is formed, a separate magnetic wand with a detector that can detect a specific magnetic field and a radio wave of a specific frequency and convert it into a specific voice or vibration, It is possible to detect a specific magnetic field, and in most parts other than the special magnetized part, when a radio wave of a specific frequency is emitted from the separate wand with a detector,
This radio wave is strongly reflected, and the radio wave can be detected from the ground with the separate wand with a detector.When the radio wave of the specific magnetic field and the specific frequency is detected, the wand with the separate detector is set to the The information is converted into a specific sound or vibration so that the information can be reliably transmitted to the person holding the stick.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cut perspective view showing one embodiment of the blind guide sheet according to the present invention, which is continuous in the length direction. FIG. 2 is a front view showing the usage state, and FIG. 3 is an explanatory plan view showing the same plane arrangement.
4 is an enlarged explanatory plan view of a part A of FIG. 3, FIG. 5 is an enlarged explanatory plan view of a part B of FIG. 3, and FIG. 6 is an enlarged explanatory plan view of a part C of FIG.

As shown in FIG. 1, the blind guiding embedded sheet (X) has a thickness of 20 μm or more.
The thickness is 0.8 mm. If the thickness is less than 20 microns, the mixed magnetic powder cannot be well dispersed, and the strength is extremely weak, which is not suitable. Preferably 0.4 mm to 1.0 m
m, and it must be strong and inexpensive. The width is about 5 cm to 30 cm, and can be sufficiently detected from the ground by a detector, and the cost is low, and the width does not disturb other underground buried objects.

The blind guide burying sheet (X) is made of polyethylene resin mixed with ferrite powder as a magnetic material. The ferrite used here is strontium ferrite, but any other magnetic material powder that can be magnetized, is inexpensive, and easily mixes with the synthetic resin may be used. The synthetic resin used is not limited to polyethylene, but may be of any type that has flexibility, high strength, can mix powder of a magnetic material well, and has durability, water resistance, and corrosion resistance.

As shown in FIG. 3, the blind guide sheet (X)
Are arranged along the road, and specially magnetized at right turn points (A), left turn points (B), intersections (C), etc. in the traveling direction indicated by arrows. These are special magnetized parts. Most of the rest is a straight portion (P), which is magnetized to a certain degree so that straightness can be continuously determined.

In the enlarged explanatory plan view of the right turn point (A) shown in FIG. 4, the portion (S) corresponding to the S pole of the magnet is hatched for the sake of explanation. In this way, magnetization is performed so that portions (S) corresponding to the S pole of the magnet and portions (N) corresponding to the N pole of the magnet are provided alternately in parallel. As the magnetizing means, for example, a sheet magnet magnetizing device (trade name, manufactured by Nihon Denki Sokki Co., Ltd. [type: oil condenser magnetizer SR
-L2510], but the present invention is not limited thereto. Thereby, S
The narrow widths of the pole and the N pole are formed at intervals of 1 mm to several mm. As shown in FIG. 5, also in the left turn point (B), the portion (S) corresponding to the S pole of the magnet and the portion (N) corresponding to the N pole of the magnet are alternately arranged in parallel. However, only the direction is different from that of FIG. As shown in FIG. 6, at the intersection (C), a portion (S) corresponding to the S pole of the magnet and a portion (N) corresponding to the N pole of the magnet are alternately crossed like a grid. . The arrangement of the S pole and the N pole shown in FIGS. 4, 5 and 6 is not limited to this, and other arrangements may be used as long as they have a characteristic arrangement.

As shown in FIG. 2, the blind guide sheet (X) is buried at a depth of 10 cm to 30 cm underground.
In this figure, the depth is about 20 cm from the ground surface. On the ground, the user (2) detects the wand (1) with the detector in his hand. This wand with detector (1) is composed of a detector (1a) and a wand (1b). The wand (1b) may be two or one, and may be held with one hand or with both hands. May be. The detector (1a) can emit a radio wave of one specific frequency in an area of several megahertz to several tens megahertz,
In addition, the radio wave of this one type of frequency can be received. Further, it has a function of detecting a characteristic magnetic field formed in a special magnetized portion such as a right turn point (A), a left turn point (B), and an intersection (C). These magnetic fields can be detected from the intensity and direction of the magnetic field lines. Here, the strength of the magnetic force magnetized on the special magnetized portion is 2000 to 3000 Gauss,
On the ground it is tens of gauss. This strength can be sufficiently detected by the detector (1a), and does not affect the nearby electric equipment such as a personal computer or a word processor or a magnetic product.

When one type of radio wave is transmitted by the detector (1a), it is strongly reflected and returned by the straight traveling portion (P). This is detected by the detector (1a) or has a special magnetized portion. When a magnetic field is detected by the detector (1a), based on the information,
The part of the cane (1b) can emit a specific sound or vibration. Therefore, an instruction such as "turn right" or "intersection" can be reliably transmitted to the user. This is signal information that can be surely recognized even by a blind person. If the walking stick with detector (1) is walked along the blind guide sheet (X) for the blind and proceeds in accordance with an instruction near the magnetized portion, it is possible to safely reach the destination without fail.

The technique for making the wand with detector (1) have various functions as described above is not a particularly difficult technique, but is merely an application of a technique generally used for landmine detectors and the like.

The blind guide burying sheet (X) may be provided alone, without using a braille block, so as to eliminate the drawbacks of the braille block, or may be used together with the braille block to provide the braille block. You may make up for a defect.

[0015]

The present invention is carried out in the form as described above, and has the following effects.

Most of this is made of a synthetic resin sheet mixed with a powder of a magnetic material, and is mostly magnetized at a constant rate, and specially magnetized at a predetermined important point, that is, at a position where a road is bent or at a branch point. Buried in the ground to reflect radio waves of a specific frequency emitted from a separate wand with a detector, or to form a characteristic magnetic field. By detecting the radio waves and the characteristic magnetic field, it gives information such as straight ahead, right turn, left turn, intersection, etc. to a person with a cane with a detector, and safely, securely, without damaging the tip of the cane Can be guided.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of a blind guide sheet according to the present invention.

FIG. 2 is a front view showing the state of use.

FIG. 3 is an explanatory plan view showing a plane arrangement.

FIG. 4 is an enlarged explanatory plan view of a portion A in FIG. 3;

FIG. 5 is an enlarged explanatory plan view of a portion B in FIG. 3;

FIG. 6 is an enlarged explanatory plan view of a portion C in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wand with detector 1a Detector 1b Wand 2 User A Right turn point B Left turn point C Intersection N Part corresponding to N pole of magnet P Straight running part S Part corresponding to S pole of magnet X Blind person guide buried sheet

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G08G 1/005 G01V 3/00 E

Claims (1)

[Claims] 1. A blind guide sheet embedded in the ground and serving as a substitute or auxiliary for a Braille block; a powder of a magnetic material mixed therein, having a thickness of 20 microns or more, and having flexibility. A certain portion of the synthetic resin sheet which can be magnetized has a certain magnetization, and a specially magnetized portion specially magnetized is provided at a predetermined position other than the most portion; A special wand with a detector that can form a magnetic field and detect a specific magnetic field and a radio wave of a specific frequency and convert it into a specific voice or vibration, and detect the specific magnetic field from the ground; In most parts other than the magnetized part,
When a radio wave of a specific frequency is emitted from the separate wand with a detector, the radio wave is strongly reflected, and the radio wave is configured to be detected from the ground by the separate wand with a detector. Blind guide buried sheet.