CN-114303040-B - Walking information identification method and device using multiple magnetic sensors

CN114303040BCN 114303040 BCN114303040 BCN 114303040BCN-114303040-B

Abstract

The application provides a walking information identification method and device using a plurality of magnetic sensors. The walking information identification method comprises the steps of generating magnetic induction signals from magnetic paint coated on the ground, generating frequency conversion signals by using the magnetic induction signals, and generating walking information by using the frequency conversion signals.

Inventors

JIN YONGXUAN
Ren Shuoxi
JIN DAYUAN

Assignees

株式会社定石化学
株式会社定石化学

Dates

Publication Date: 20260421
Application Date: 20210603
Priority Date: 20200623

Claims (14)

1. A walking information identification method using a plurality of magnetic sensors, comprising: generating a magnetic induction signal from a magnetic paint applied to the ground; generating a frequency transformed signal using the magnetic induction signal; generating walking information using the frequency converted signal; Detecting the magnetic induction signals with a preset period to generate detection signals, equally dividing the detection signals according to a preset number to generate average signals, and collecting the average signals of a preset conversion unit and then carrying out frequency conversion to generate the frequency conversion signals; the magnetic induction signal comprises: a first magnetic sub-signal generated from the magnetic paint by a first magnetic sensor, and A second magnetic sub-signal generated from the magnetic paint by a second magnetic sensor; The frequency transformed signal is generated by using a noise reduction signal generated by a difference between the first magnetic sub-signal and the second magnetic sub-signal; the noise reduction signal is generated by utilizing a difference between the average signal corresponding to the first magnetic sub-signal and the average signal corresponding to the second magnetic sub-signal.
2. The method as recited in claim 1, further comprising: And generating the direction information of the magnetic paint by using the time difference between the first magnetic sub-signal and the second magnetic sub-signal.
3. The method of claim 1, further comprising generating an optical sensing signal from the magnetic paint, Generating the walking information includes: and generating walking information by using at least one of the frequency conversion signal and the optical sensing signal.
4. The method of claim 3, wherein the step of, The magnetic induction signal corresponds to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.
5. The method of claim 3, wherein the step of, The optical sensing signal subdivides the magnetic pattern corresponding to the magnetic induction signal so that the amount of information per unit length or per unit area is greater than if only the magnetic induction signal were used.
6. A walking information recognition device using a plurality of magnetic sensors, comprising: a magnetic sensor for generating a magnetic induction signal from a magnetic paint coated on the ground; a frequency conversion part for generating a frequency conversion signal by using the magnetic induction signal, and A control unit for generating walking information using the frequency conversion signal; Detecting the magnetic induction signals with a preset period to generate detection signals, equally dividing the detection signals according to a preset number to generate average signals, and collecting the average signals of a preset conversion unit and then carrying out frequency conversion to generate the frequency conversion signals; the magnetic induction signal comprises: a first magnetic sub-signal generated from the magnetic paint by a first magnetic sensor, and A second magnetic sub-signal generated from the magnetic paint by a second magnetic sensor; The frequency transformed signal is generated by using a noise reduction signal generated by a difference between the first magnetic sub-signal and the second magnetic sub-signal; the noise reduction signal is generated by utilizing a difference between the average signal corresponding to the first magnetic sub-signal and the average signal corresponding to the second magnetic sub-signal.
7. A walking information identification method using a magnetic/optical pattern, comprising: generating magnetic induction information from a magnetic paint coated on the ground by a magnetic sensor; Generating, by an optical sensor, optical sensing information from the magnetic paint; generating walking information using at least one of the magnetic induction information and the optically sensed information, and Providing user information corresponding to the walking information; the pattern of the magnetic paint coated on the ground is formed of a one-dimensional pattern for one dimension and a two-dimensional pattern for two dimensions; the one-dimensional pattern and the two-dimensional pattern include various colors so as to embed various information in combination with magnetic characteristics and optical characteristics.
8. The method of claim 7, wherein the step of determining the position of the probe is performed, The magnetic induction information corresponds to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.
9. The method of claim 8, wherein the step of determining the position of the first electrode is performed, The optical sensing information subdivides the magnetic pattern corresponding to the magnetic induction information so that the amount of information per unit length or unit area is greater than in the case where only the magnetic induction information is used.
10. The method of claim 8, wherein the step of determining the position of the first electrode is performed, The manner in which the magnetic induction information is used to generate the walk information is changed based on the optical sensing information.
11. The method of claim 8, wherein the step of determining the position of the first electrode is performed, The walking information is generated by using user terminal sensor information in addition to the magnetic induction information and the optical sensing information.
12. The method of claim 11, wherein the step of determining the position of the probe is performed, The user terminal sensor information is used to correct at least one of the magnetic induction information and the optical sensing information.
13. The method of claim 11, wherein the step of determining the position of the probe is performed, The magnetic induction information is used to control the optical sensor.
14. A walk information identifying apparatus using a magnetic/optical pattern, comprising, A magnetic sensor for generating magnetic induction information from a magnetic paint coated on the ground; An optical sensor for generating optical sensing information from the magnetic paint, and A control section for generating walking information using at least one of the magnetic induction information and the optical sensing information, and providing user information corresponding to the walking information; the pattern of the magnetic paint coated on the ground is formed of a one-dimensional pattern for one dimension and a two-dimensional pattern for two dimensions; the one-dimensional pattern and the two-dimensional pattern include various colors so as to embed various information in combination with magnetic characteristics and optical characteristics.

Description

Walking information identification method and device using multiple magnetic sensors Technical Field The present invention relates to a method and apparatus (METHOD AND APPARATUS OF RECOGNIZING WALKING INFORMATION BY USING MULTIPLE MAGNETIC SENSORS) for identifying walking information using a plurality of magnetic sensors, and more particularly, to a technique for identifying walking information from a magnetic paint applied to the ground. The present invention claims priority from korean patent office, application No. 10-2020-0076501, 23, 2020, and application No. 10-2020-0076502, the disclosure of which is incorporated herein by reference in its entirety. Background Unless otherwise indicated herein, what is described in this section is not prior art to the claims in this application and is not admitted to be prior art by inclusion in this section. The visually impaired can find out the wanted direction by using the walking stick to detect the concave-convex of the sidewalk block of the blind. However, there has been a problem that the visually impaired person and the ordinary person slip or fall due to the concave-convex portion of the blind person's pavement block. In addition, since pedestrians sitting in the wheelchair need to detect the unevenness of the pavement while driving the wheelchair, there is also a safety problem. In addition, the blind person pavement block has not only structural problems but also a problem that the amount of information that can be transmitted to the visually impaired person is very small. The blind person sidewalk block transmits only the straight line section and the cross section to the visually impaired person according to the form of the concave-convex, and has some limitations in providing more information. Accordingly, there is a need for a technique that can provide various information to visually impaired people without the need for irregularities. Disclosure of Invention The present invention aims to accurately detect magnetic signals from magnetic paint applied to a road (walking road) using a plurality of magnetic sensors. In addition, the present invention aims to effectively remove noise using a plurality of signals detected by a plurality of sensors when a magnetic signal sensitive to noise is detected. In addition, the present invention is directed to efficiently detecting magnetic signals from a magnetic paint applied to a road in order to recognize patterns for providing walking information. The present invention is also directed to a method for providing a magnetic pattern and/or an optical pattern to a paint applied to a road (pedestrian road) and for receiving pedestrian information by detecting the magnetic pattern and the optical pattern by pedestrians such as visually impaired people. In addition, the present invention aims to coat a magnetic pattern and an optical pattern together with a paint including a magnetic substance, so that sufficient information can be stored to provide walking information even if a portion to which the paint is applied is not large. In addition, the present invention aims to effectively provide pedestrians with walking information by constructing a magnetic pattern or an optical pattern not only in one dimension but also in two dimensions. Further, not limited to the above-described objects, it is apparent that other objects can be deduced from the following description. In order to achieve the above object, a walking information identification method using a plurality of magnetic sensors according to an embodiment of the present invention includes generating a magnetic induction signal from a magnetic paint coated on the ground, generating a frequency conversion signal using the magnetic induction signal, and generating walking information using the frequency conversion signal. The frequency conversion signal can be generated by detecting the magnetic induction signal with a preset period to generate a detection signal, equally dividing the detection signal by a preset number to generate an average signal, and collecting the average signal of a preset conversion unit and then performing frequency conversion. At this time, the magnetic induction signal may include a first magnetic sub-signal generated from the magnetic paint by a first magnetic sensor and a second magnetic sub-signal generated from the magnetic paint by a second magnetic sensor. At this time, the frequency conversion signal may be generated by using a noise reduction signal generated by a difference between the first magnetic sub-signal and the second magnetic sub-signal. At this time, the noise reduction signal may be generated by using a difference between the average signal corresponding to the first magnetic sub-signal and the average signal corresponding to the second magnetic sub-signal. At this time, the walking information identification method using a plurality of magnetic sensors according to an embodiment of the present invention may further