Walking information recognition method and device using multiple magnetic sensors

Abstract

A walking information recognition method and device using a plurality of magnetic sensors are provided. The walking information recognition method includes generating a magnetic induction signal from a magnetic paint applied to a floor, generating a frequency conversion signal using the magnetic induction signal, and generating walking information using the frequency conversion signal.

Description

Technical Field

[0001] This invention relates to a method and apparatus for recognizing walking information using multiple magnetic sensors, and more particularly to a technique for recognizing walking information from magnetic coatings applied to the ground.

[0002] This invention claims priority to the Korean Patent Application No. 10-2020-0076501, filed on June 23, 2020, and the Korean Patent Application No. 10-2020-0076502, filed on June 23, 2020, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] Unless otherwise stated in this specification, the content described in this section is not prior art to the claims of this application, and even if included in this section, it should not be considered prior art.

[0004] Visually impaired people can use canes to detect the unevenness of the treadmill pavement to find the direction they want to go.

[0005] However, due to the unevenness of the tactile paving for the blind, there have been problems that have caused visually impaired people and ordinary people to slip or fall.

[0006] In addition, safety issues have arisen because wheelchair users need to inspect the unevenness of the sidewalk while driving their wheelchairs.

[0007] In addition, the tactile paving for the blind not only has structural problems, but also has the problem of conveying very little information to visually impaired people.

[0008] The tactile paving blocks for the blind, based on their uneven shape, only convey straight sections and intersections to visually impaired individuals, which limits their ability to provide more information.

[0009] Therefore, there is a need for a technology that can provide various information to visually impaired people without requiring any protrusions or indentations. Summary of the Invention

[0010] The present invention aims to accurately detect magnetic signals from magnetic coatings applied to roads (pedestrian paths) using multiple magnetic sensors.

[0011] In addition, the present invention aims to effectively remove noise by utilizing multiple signals detected by multiple sensors when detecting noise-sensitive magnetic signals.

[0012] In addition, the present invention aims to effectively detect magnetic signals from magnetic coatings applied to roads in order to identify patterns used to provide walking information.

[0013] In addition, the present invention aims to include magnetic patterns and / or optical patterns in the coating applied to roads (pedestrian paths), so that visually impaired people and other pedestrians passing by can receive walking information by detecting the magnetic and optical patterns.

[0014] In addition, the present invention aims to use a coating containing magnetic materials to coat magnetic patterns and optical patterns together, so that even if the coated area is small, it can store enough information to provide walking information.

[0015] In addition, the present invention aims to effectively provide pedestrians with walking information by constructing magnetic or optical patterns not only in one dimension but also in two dimensions.

[0016] Furthermore, not limited to the above purposes, other purposes can obviously be derived from the following description.

[0017] To achieve the aforementioned objective, a method for identifying pedestrian information using multiple magnetic sensors according to an embodiment of the present invention includes: generating a magnetic induction signal from a magnetic coating applied to the ground, generating a frequency conversion signal using the magnetic induction signal, and generating pedestrian information using the frequency conversion signal.

[0018] At this time, the frequency conversion signal can be generated by: detecting the magnetic induction signal at a preset period to generate a detection signal, dividing the detection signal equally according to a preset number to generate an average signal, and then performing frequency conversion on the average signal after collecting a preset conversion unit.

[0019] At this time, the magnetic induction signal may include: a first magnetic signal generated from the magnetic coating by a first magnetic sensor; and a second magnetic signal generated from the magnetic coating by a second magnetic sensor.

[0020] At this time, the frequency conversion signal can be generated by using a noise-reduced signal generated by the difference between the first magnetic signal and the second magnetic signal.

[0021] At this time, the noise-reduced signal can be generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

[0022] At this point, the pedestrian information recognition method using multiple magnetic sensors according to an embodiment of the present invention may further include: generating the direction information of the magnetic coating by using the time difference between receiving the first magnetic signal and the second magnetic signal.

[0023] At this point, a method for identifying walking information using multiple magnetic sensors according to an embodiment of the present invention further includes: generating an optical sensing signal from the magnetic coating, wherein generating the walking information may include: generating the walking information using at least one of the frequency conversion signal and the optical sensing signal.

[0024] At this time, the magnetic induction signal can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0025] At this time, the optical sensing signal can subdivide 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 that when only the magnetic induction signal is used.

[0026] In addition, to achieve the aforementioned objective, an embodiment of the present invention provides a pedestrian information recognition device utilizing multiple magnetic sensors, comprising: a magnetic sensor for generating a magnetic induction signal from a magnetic coating applied to the ground; a frequency conversion unit for generating a frequency conversion signal using the magnetic induction signal; and a control unit for generating pedestrian information using the frequency conversion signal.

[0027] At this time, the frequency conversion unit can generate a detection signal by detecting the magnetic induction signal at a preset period, divide the detection signal into an average signal according to a preset number, and generate the frequency conversion signal by collecting the average signal of a preset conversion unit and performing frequency conversion.

[0028] At this time, the magnetic induction signal may include: a first magnetic signal generated from the magnetic coating by a first magnetic sensor; and a second magnetic signal generated from the magnetic coating by a second magnetic sensor.

[0029] At this time, the frequency conversion signal can be generated by using a noise-reduced signal generated by the difference between the first magnetic signal and the second magnetic signal.

[0030] At this time, the noise-reduced signal can be generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

[0031] At this time, the control unit can use the time difference between receiving the first magnetic signal and the second magnetic signal to generate the direction information of the magnetic coating.

[0032] At this time, the pedestrian information recognition device utilizing multiple magnetic sensors according to an embodiment of the present invention may further include: an optical sensor for generating an optical sensing signal from the magnetic coating, wherein the control unit may generate pedestrian information using at least one of the frequency conversion signal and the optical sensing signal.

[0033] At this time, the magnetic induction signal can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0034] At this time, the optical sensing signal can subdivide 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 that when only the magnetic induction signal is used.

[0035] To achieve the aforementioned objective, a method for identifying pedestrian information using magnetic / optical patterns according to an embodiment of the present invention includes: generating magnetic induction information from a magnetic coating applied to the ground using a magnetic sensor; generating optical sensing information from the magnetic coating using an optical sensor; generating pedestrian information using at least one of the magnetic induction information and the optical sensing information; and providing user information corresponding to the pedestrian information.

[0036] At this time, the magnetic induction information can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0037] At this time, the optical sensing information can subdivide the magnetic pattern corresponding to the magnetic induction information so that the amount of information per unit length or per unit area is greater than that when only the magnetic induction information is used.

[0038] In this case, in the pedestrian information recognition method using magnetic / optical patterns according to an embodiment of the present invention, the method of generating the pedestrian information using the magnetic induction information can change according to the optical sensing information.

[0039] At this time, the walking information can be generated using user terminal sensor information in addition to the magnetic induction information and the optical sensing information.

[0040] At this time, the user terminal sensor information can be used to correct at least one of the magnetic induction information and the optical sensing information.

[0041] At this time, the magnetic induction information can be used to control the optical sensor.

[0042] In addition, to achieve the aforementioned objective, a pedestrian information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention may include: a magnetic sensor for generating magnetic induction information from a magnetic coating applied to the ground; an optical sensor for generating optical sensing information from the magnetic coating; and a control unit for generating pedestrian information using at least one of the magnetic induction information and the optical sensing information, and providing user information corresponding to the pedestrian information.

[0043] At this time, the magnetic induction information can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0044] At this time, the optical sensing information can subdivide the magnetic pattern corresponding to the magnetic induction information so that the amount of information per unit length or per unit area is greater than that when only the magnetic induction information is used.

[0045] At this time, in a pedestrian information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention, the method of generating the pedestrian information using the magnetic induction information can change according to the optical sensing information.

[0046] At this time, the walking information can be generated using user terminal sensor information in addition to the magnetic induction information and the optical sensing information.

[0047] At this time, the user terminal sensor information can be used to correct at least one of the magnetic induction information and the optical sensing information.

[0048] At this time, the magnetic induction information can be used to control the optical sensor.

[0049] According to the present invention, multiple magnetic sensors can be used to accurately detect magnetic signals from magnetic coatings applied to roads (pedestrian paths).

[0050] Furthermore, according to the present invention, when a noise-sensitive magnetic signal is detected, noise can be effectively removed using multiple signals detected by multiple sensors.

[0051] In addition, according to the present invention, magnetic signals can be effectively detected from the magnetic coating applied to the road to facilitate the identification of patterns used to provide walking information.

[0052] In addition, according to the present invention, the coating applied to the road (pedestrian road) may include magnetic patterns and / or optical patterns, and pedestrians such as visually impaired persons passing by may receive walking information by detecting the magnetic patterns and optical patterns.

[0053] Furthermore, according to the present invention, magnetic patterns and optical patterns can be coated together using a coating that includes magnetic materials, thereby enabling sufficient information to be stored to provide walking information even if the coated area is small.

[0054] Furthermore, according to the present invention, by constructing magnetic or optical patterns not only in one dimension but also in two dimensions, walking information can be effectively provided to pedestrians.

[0055] The effects of this embodiment are not limited to those described above, and those skilled in the art can clearly understand other effects not mentioned in the claims. Attached Figure Description

[0056] Figure 1This is a usage state diagram of a pedestrian information recognition device according to an embodiment of the present invention;

[0057] Figure 2 This is a block diagram of a pedestrian information recognition device according to an embodiment of the present invention;

[0058] Figure 3 A graph illustrating the process of generating a frequency-converted signal according to an embodiment of the present invention;

[0059] Figure 4 and Figure 5 This is a structural diagram of a pedestrian information recognition device including multiple magnetic sensors according to an embodiment of the present invention;

[0060] Figure 6 This is a block diagram of a pedestrian information recognition device including multiple magnetic sensors according to an embodiment of the present invention;

[0061] Figure 7 A graph illustrating the process of generating a noise-reduced signal according to an embodiment of the present invention;

[0062] Figure 8 A graph illustrating the process of generating a frequency-converted signal from a noise-reduced signal according to an embodiment of the present invention;

[0063] Figure 9 This is a flowchart of generating pedestrian guidance signals according to an embodiment of the present invention;

[0064] Figure 10 This is a schematic diagram illustrating the application of multiple magnetic patterns according to an embodiment of the present invention;

[0065] Figure 11 It is a graph representing the magnetic field strength based on the positions of multiple magnetic patterns and pedestrian information recognition devices;

[0066] Figure 12 A schematic diagram illustrating a pattern of magnetic coating applied to the ground according to the present invention;

[0067] Figure 13 A table representing the information signals provided to each unit of the magnetic coating pattern;

[0068] Figure 14 A table showing examples of hexadecimal methods generated by composite patterns;

[0069] Figure 15 This is a diagram illustrating the generation of walking information during forward walking;

[0070] Figure 16 This is a schematic diagram illustrating the generation of walking information during reverse walking.

[0071] Figure 17This is a schematic diagram of controlling an optical sensor based on a magnetic induction signal;

[0072] Figure 18 This is a flowchart of a method for identifying pedestrian information using multiple magnetic sensors according to an embodiment of the present invention;

[0073] Figure 19 This is a diagram representing a computer system according to an embodiment of the present invention;

[0074] Figure 20 This is a usage status diagram of a pedestrian information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention;

[0075] Figure 21 A schematic diagram illustrating a pattern of magnetic coating applied to the ground according to the present invention;

[0076] Figure 22 A table representing the information signals provided to each unit of the magnetic coating pattern;

[0077] Figure 23 A table showing examples of hexadecimal methods generated by composite patterns;

[0078] Figure 24 This is a diagram illustrating the generation of walking information during forward walking;

[0079] Figure 25 This is a schematic diagram illustrating the generation of walking information during reverse walking.

[0080] Figure 26 This is a schematic diagram illustrating communication with a user terminal according to an embodiment of the present invention;

[0081] Figure 27 This is a schematic diagram of controlling an optical sensor based on magnetic induction information;

[0082] Figure 28 This is a schematic diagram illustrating the application of two magnetic patterns according to an embodiment of the present invention;

[0083] Figure 29 It is a graph representing the magnetic field strength based on the positions of two magnetic patterns and the pedestrian information recognition device;

[0084] Figure 30 This is a structural diagram of a pedestrian information recognition device including two magnetic sensors according to an embodiment of the present invention.

[0085] Figure 31 This is a flowchart of generating pedestrian guidance signals according to an embodiment of the present invention;

[0086] Figure 32 This is a block diagram of a pedestrian information recognition device according to an embodiment of the present invention;

[0087] Figure 33 A graph illustrating the process of generating a frequency-converted signal according to an embodiment of the present invention;

[0088] Figure 34 This is a structural diagram of a pedestrian information recognition device that integrates two magnetic sensors in the same direction according to an embodiment of the present invention;

[0089] Figure 35 This is a block diagram of a pedestrian information recognition device including two magnetic sensors according to an embodiment of the present invention;

[0090] Figure 36 A graph illustrating the process of generating a noise-reduced signal according to an embodiment of the present invention;

[0091] Figure 37 A graph illustrating the process of generating a frequency-converted signal from a noise-reduced signal according to an embodiment of the present invention;

[0092] Figure 38 This is a flowchart of a method for identifying pedestrian information using magnetic / optical patterns according to an embodiment of the present invention;

[0093] Figure 39 This is a diagram representing a computer system according to an embodiment of the present invention. Detailed Implementation

[0094] The present invention will now be described in detail with reference to the accompanying drawings. In the following description, repeated descriptions, functional descriptions that may unnecessarily obscure the essence of the invention, and detailed descriptions of configurations will be omitted. Embodiments of the present invention are provided to explain the invention more completely to those skilled in the art. Therefore, for clarity, the shapes and sizes of elements in the drawings may be exaggerated.

[0095] According to one embodiment of the present invention, instead of tactile paving blocks with uneven surfaces, magnetic coatings or coatings of various colors are used on general tactile paving blocks without uneven surfaces to record magnetic or optical information as one-dimensional or two-dimensional patterns, which are read by magnetic sensors or optical sensors respectively. This provides walking information not only to visually impaired people, but also to ordinary people.

[0096] In addition, according to one embodiment of the present invention, one-dimensional patterns and two-dimensional patterns are applied simultaneously on the pedestrian block, and each magnetic and optical information can be detected and utilized complementaryly, thereby providing a significant reduction in the malfunction of the sensor that detects each piece of information.

[0097] At this point, the walking information provided can be information related to the location and direction of movement of the pattern, as well as various other information that the construction worker wants to convey.

[0098] Therefore, in one embodiment of the present invention, a magnetic field detection device or an optical detection device for distinguishing colors (color detection device) can be used in combination to identify the information, and can be linked with a user terminal, such as a portable electronic communication device, to convey more information to pedestrians in an auditory or visual manner.

[0099] One embodiment is not limited to sidewalk blocks; it can also be implemented by applying coatings with magnetic and optical information to the ground or other surfaces, and can also be applied to objects that move using it and systems that operate such objects.

[0100] In addition, one embodiment of the present invention includes at least one magnetic sensor for recognizing the magnetic pattern, and a noise-reduced signal is generated by the difference between the signals input to each magnetic sensor, and magnetic information can also be detected by the noise-reduced signal.

[0101] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0102] Figure 1 This is a usage state diagram of a pedestrian information recognition device according to an embodiment of the present invention.

[0103] Reference Figure 1 In one embodiment of the present invention, the pedestrian information recognition device 110 is made in the form of a stick so that it can be carried by a user (pedestrian, etc.) and can be configured to recognize information stored in the magnetic coating 120 applied to the ground 130.

[0104] At this time, the magnetic coating 120 can form a specific pattern by utilizing its magnetic properties, or it can form a specific pattern by utilizing the optical properties of different colors.

[0105] At this time, the pedestrian information recognition device 110 according to an embodiment of the present invention can identify the pedestrian information inherent in the specific pattern of the magnetic paint 120 applied to the ground and provide it to the user.

[0106] At this point, walking information can include all the information needed for walking, such as current location, surrounding buildings, tourist information, and walking route range.

[0107] Figure 2 This is a block diagram of a pedestrian information recognition device according to an embodiment of the present invention.

[0108] Reference Figure 2 According to an embodiment of the present invention, the pedestrian information recognition device 110 may include a magnetic sensor 211, an analog-to-digital converter (ADC) 213, and a processor (e.g., MCU, MICOM, etc.) 215.

[0109] At this time, the pedestrian information recognition device 110 according to an embodiment of the present invention can generate pedestrian information from the magnetic coating on the ground, and can provide the pedestrian information to the user terminal 220 through wired or wireless communication.

[0110] At this time, the magnetic sensor 211 can detect magnetic signals from the magnetic coating on the ground.

[0111] At this point, since the magnetic signal can be an analog signal, it can be converted into a digital signal by the analog-to-digital converter 213, as described below.

[0112] At this time, the magnetic sensor 211 can also detect noise signals based on the environment in which the Earth's magnetic field or the surrounding ferromagnetic field is generated or guided. Therefore, in this case, a magnetic sensor that detects dynamic signals can be used instead of a magnetic sensor that detects static signals.

[0113] A magnetic sensor that detects dynamic signals cannot detect a signal when the magnetic coating containing recorded magnetic information is stationary; it can only detect a signal when the surface is in motion. In other words, a sensor capable of detecting magnetic signals that change over time can be used.

[0114] At this time, the analog-to-digital converter 213 can convert the analog signal detected by the magnetic sensor 211 into a digital signal for processing on the processor 215.

[0115] At this time, the analog-to-digital converter 213 can be an ADC with a resolution of 12 bits or more and a sampling rate of 1 kS / s or more.

[0116] At this time, the processor 215 can process the digital signal transformed by the analog-to-digital converter 213 to generate walking information.

[0117] More specifically, the processor 215 can perform a Fast Fourier Transform (FFT) on the digital signal to extract the period, i.e., the frequency, of the pattern recorded on the magnetic coating.

[0118] At this time, the processor 215 can generate the walking information based on the frequency to convey it to the user terminal 220, and the walking information analyzed from the signal detection process during the fast Fourier transform is preferably conveyed to the user terminal 220 within 1 second.

[0119] At this time, the communication method for conveying the walking information can be a short-range wireless communication method or a wired communication method, such as Wi-Fi, near field communication (NFC), Bluetooth, etc.

[0120] At this time, the walking information can be converted into tactile (e.g., vibration) or auditory (e.g., sound) signals by the user terminal 220 and provided to the user, and can also be provided visually through the display screen of the user terminal 220.

[0121] As mentioned above, the reason for providing different methods is to improve the efficiency and quantity of information delivery to users within the same timeframe.

[0122] Figure 3 A graph illustrating the process of generating a frequency-converted signal according to an embodiment of the present invention.

[0123] Reference Figure 3 The curve 310 on the left is a curve obtained by measuring the field programmable gate array (FPGA) using a magnetic sensor after constructing the magnetic interaction pattern corresponding to 60Hz.

[0124] At this point, the curve 310 on the left is a graph showing the 1024 signals collected in 1.024 seconds, obtained by detecting a signal from an analog magnetic sensor once every 5 microseconds using an FPGA and taking the average of 200 detected signals as a single signal.

[0125] At this point, the width (amplitude) of the minimum and maximum intensity of the curve 310 on the left can vary within a signal range of approximately 100mV (about 2.62V-2.52V).

[0126] The curve 320 on the right is the result curve after performing a Fast Fourier Transform on the 1024 signals. When the magnetic interactive pattern is applied to a frequency corresponding to 60Hz, the result of the transformed signal detected by the magnetic sensor shows that the 60Hz signal 321 is clearly distinguishable from other signals. Therefore, the magnetic pattern signal can be used to provide walking information, etc. That is, because magnetic signals are very sensitive to noise and have the characteristic of large variations in measured values ​​relative to various noise levels, it is difficult to obtain the required walking information from the magnetic signals measured by the coated magnetic paint if it cannot be effectively measured. Therefore, by collecting a sufficient number of detection signals to calculate the average value, and then performing a frequency transformation on the calculated average value, the required frequency pattern can be detected from the magnetic paint coated on the ground.

[0127] However, when detecting magnetic signals from a single magnetic sensor, the means to reduce noise are somewhat insufficient. Therefore, as described below, multiple magnetic sensors can be used to reduce noise in order to more precisely detect the frequency corresponding to the magnetic interaction pattern.

[0128] Figure 4 and Figure 5 This is a structural diagram of a pedestrian information recognition device including multiple magnetic sensors according to an embodiment of the present invention.

[0129] Reference Figure 4 According to an embodiment of the present invention, the pedestrian information recognition device 110 is made in the form of a stick so that it can be carried by a user (pedestrian, etc.) and includes two magnetic sensors 421, 423 that can detect magnetic signals from the left and right sides of the stick, and may include a center mark 410 that can distinguish the center of the stick.

[0130] At this time, the first magnetic sensor 421, which is used to detect the magnetic signal on the left side of the rod, and the second magnetic sensor 423, which is used to detect the magnetic signal on the right side of the rod, can be spaced apart from each other on the rod, with the center mark 410 as the center.

[0131] On the other hand, refer to Figure 5 In a pedestrian information recognition device 110 according to an embodiment of the present invention, two magnetic sensors 425 and 427 capable of detecting magnetic signals are integrated on one side of the rod, and a center mark 410 capable of distinguishing the center of the rod is included.

[0132] At this point, the pedestrian information recognition device 110 according to an embodiment of the present invention, which includes two magnetic sensors 421, 423, 425, and 427, can reduce noise by utilizing the time difference of the magnetic signals detected from each magnetic sensor. Furthermore, the magnetic signals detected from each magnetic sensor are mutually excluded, thereby reducing noise.

[0133] Figure 6 This is a block diagram of a pedestrian information recognition device including multiple magnetic sensors according to an embodiment of the present invention.

[0134] Reference Figure 6 According to an embodiment of the present invention, the pedestrian information recognition device 110 may include a first magnetic sensor 511-1, a second magnetic sensor 511-2, an analog-to-digital converter (ADC) 513, and a processor (e.g., MCU, MICOM, etc.) 515.

[0135] At this time, according to an embodiment of the present invention, the pedestrian information recognition device 110, such as an embodiment including a magnetic sensor, can generate pedestrian information from the magnetic coating on the ground and provide the pedestrian information to the user terminal 520 through wired or wireless communication or other means.

[0136] At this time, the first magnetic sensor 511-1 and the second magnetic sensor 511-2 can detect magnetic signals from the magnetic coating on the ground. At this time, the same magnetic signal needs to be detected from the same magnetic coating, and the detection can be performed at certain intervals.

[0137] At this point, since the magnetic signal can be an analog signal, it is converted into a digital signal by an analog-to-digital converter, as described below.

[0138] At this point, magnetic sensors 511-1 and 511-2 can also detect noise signals generated in environments where the Earth's magnetic field or nearby ferromagnetic fields are generated or guided. Therefore, in this case, a magnetic sensor that detects dynamic signals can be used instead of a magnetic sensor that detects static signals.

[0139] A magnetic sensor that detects dynamic signals cannot detect a signal when the magnetic coating containing recorded magnetic information is stationary; it can only detect a signal when the surface is in motion. In other words, a sensor capable of detecting magnetic signals that change over time can be used.

[0140] At this time, the analog-to-digital converter 513 can convert the analog magnetic signals detected by the first magnetic sensor 511-1 and the second magnetic sensor 511-2 into digital signals for processing on the processor 515.

[0141] At this time, the analog magnetic signals detected by the first magnetic sensor 511-1 and the second magnetic sensor 511-2 can be the differences between the various analog magnetic signals detected by the first magnetic sensor 511-1 and the second magnetic sensor 511-2. More specifically, refer to... Figure 6 Describe it.

[0142] At this time, the analog-to-digital converter 513 can be an ADC with a resolution of 12 bits or more and a sampling rate of 1 kS / s or more.

[0143] At this point, the processor 515 can process the digital signal transformed by the analog-to-digital converter 513 to generate walking information.

[0144] More specifically, the processor 515 can perform a Fast Fourier Transform (FFT) on the digital signal to extract the period, i.e., the frequency, of the pattern recorded on the magnetic coating.

[0145] At this time, the processor 515 can generate the walking information based on the frequency to convey it to the user terminal 520, and the walking information analyzed from the signal detection process during the fast Fourier transform is preferably conveyed to the user terminal 520 within 1 second.

[0146] At this time, the communication method for conveying the walking information can be a short-range wireless communication method or a wired communication method, such as Wi-Fi, near field communication (NFC), Bluetooth, etc.

[0147] At this time, the walking information can be converted into tactile (e.g., vibration) or auditory (e.g., sound) signals by the user terminal 520 and provided to the user, and can be provided visually through the display screen of the user terminal (520).

[0148] As mentioned above, the reason for providing different methods is to improve the efficiency and quantity of information delivery to users within the same timeframe.

[0149] Figure 7 A graph illustrating the process of generating a noise-reduced signal according to an embodiment of the present invention.

[0150] Reference Figure 7 According to one embodiment of the present invention, a pedestrian information recognition device including two magnetic sensors can detect the same magnetic signal at certain time intervals.

[0151] For example, if the source of the magnetic signal is closer to the first magnetic sensor than the second magnetic sensor, the detection speed of the first magnetic signal 610 detected by the first magnetic sensor is t2-t1 faster than the detection speed of the second magnetic signal 620 detected by the second magnetic sensor.

[0152] However, the noise signal 611 detected by the first magnetic sensor and the noise signal 621 detected by the second magnetic sensor are input within the same time period, with no time difference.

[0153] Therefore, by calculating the difference between the first magnetic signal 610 and the second magnetic signal 620, a noise-reduced signal 630 with the noise signal 631 removed can be generated, thereby allowing for a more precise extraction of the frequencies recorded in the magnetic coating.

[0154] At this time, the noise reduction signal 630 can be the difference between the average signal corresponding to the first magnetic signal 610 and the average signal corresponding to the second magnetic signal 620.

[0155] Furthermore, a pedestrian information recognition device according to an embodiment of the present invention can be as follows: Figure 5 As shown, it exists as an integrated arrangement of two magnetic sensors 425 and 427 for detecting magnetic fields in different directions respectively.

[0156] More specifically, either of the two magnetic sensors 425 or 427 can be installed in the pedestrian information recognition device 110 in an orientation that enables the detection of a vertical magnetic field, while the other magnetic sensors 427 or 425 can be installed in the pedestrian information recognition device 110 in an orientation that enables the detection of a horizontal magnetic field.

[0157] At this point, if the magnetic field in the vertical direction is the strongest in the paint with the magnetic pattern applied, then the magnetic field signal in the horizontal direction is relatively weak.

[0158] At this time, the pedestrian information recognition device according to an embodiment of the present invention can be integrated to enable the first magnetic sensor 425 to detect a first magnetic signal corresponding to a vertical magnetic field and the second magnetic sensor 427 to detect a second magnetic signal corresponding to a horizontal magnetic field.

[0159] At this time, when the pedestrian information recognition device according to an embodiment of the present invention is applied to the above-described method based on the two signals, the noise signals occurring in the surrounding area can be reduced, thereby allowing for a clear reading of the signals to be detected in the coating.

[0160] On the other hand, the method can also utilize the detection time difference between the two sensors mentioned above.

[0161] Figure 8 A graph illustrating the process of generating a frequency-converted signal from a noise-reduced signal according to an embodiment of the present invention.

[0162] Reference Figure 8 The curve on the left is 710. Figure 3 The figure shows a graph of the difference between the first and second magnetic signals, i.e., the noise reduction signal, after the construction of the magnetic interaction pattern corresponding to 60Hz.

[0163] As mentioned above, by using two magnetic sensors, noise can be reduced and the frequencies recorded in the magnetic coating can be extracted more precisely.

[0164] At this time, the curve 710 on the left can be a curve representing the difference between the first magnetic signal and the second magnetic signal detected by the FPGA every 5us, and the average value of the 200 detected signals as a signal, and the curve of 1024 signals collected in 1.024 seconds.

[0165] Alternatively, the curve 710 on the left can be a graph representing the detection of the first magnetic signal and the second magnetic signal by the FPGA every 5µs, the calculation of the average value of 200 of the detected signals, and the curve of 1024 signals collected in 1.024 seconds based on the difference between the average values.

[0166] At this point, the width (amplitude) of the minimum and maximum intensity of the curve 710 on the left can vary within a signal of approximately 100mV (approximately 2.62V-2.52V), which is about 3 times smaller than the case detected using a magnetic sensor (2.62V-2.52V=100mV).

[0167] The curve 720 on the right is the result curve after performing a fast Fourier transform on the 1024 signals. By coloring the magnetic interaction pattern to correspond to 60Hz and then detecting it, the result of transforming the noise reduction signal shows that high frequencies such as 60Hz, 120Hz, and 180Hz are more likely to appear for 60Hz, so the magnetic pattern of 60Hz 721 can be clearly distinguished.

[0168] Figure 9 This is a flowchart of generating pedestrian guidance signals according to an embodiment of the present invention.

[0169] According to one embodiment of the present invention, two magnetic sensors are installed at different locations of the pedestrian information recognition device, and at least one magnetic coating applied to the ground can be distinguished by using the relative signals detected in the two sensors.

[0170] In addition, according to one embodiment of the present invention, magnetic coating can be applied to the ground in the form of lines to guide users or moving objects such as wheelchairs to the middle between the lines.

[0171] At this time, the method for generating the guidance signal according to an embodiment of the present invention can be initialized by first substituting 0 into the variable t, defining the output of the first magnetic sensor located on the right side of the pedestrian information recognition device according to an embodiment of the present invention as SR (t=0), and defining the output of the second magnetic sensor located on the left side as SL (t=0) to initialize S801.

[0172] At this point, the variable t can correspond to time, and SR(t) and SL(t) can correspond to the output of each magnetic sensor according to time.

[0173] In addition, according to an embodiment of the present invention, the method for generating a guiding signal can, as time changes, define SR(t) and SL(t) corresponding to each time as corresponding to the time S802, and compare SR(t) and SL(t) S803.

[0174] In this embodiment of the present invention, in the method for generating a guiding signal, when SR(t) is greater than SL(t), a signal to move to the left can be generated S807, and when SR(t) is not greater than SL(t), it is possible to compare whether SR(t) and SL(t) are the same S805.

[0175] At this time, the method for generating a guiding signal according to an embodiment of the present invention can return to the beginning and repeat the steps if SL(t) and SR(t) are the same, and generate a rightward moving signal S809 if SL(t) and SR(t) are different.

[0176] At this time, according to an embodiment of the present invention, after generating a signal to move left or right, in order to determine the user's current position again, the method for generating a guidance signal can substitute null value S811 into SR(t) and SL(t), substitute t+1 into variable t, and re-execute from step S802.

[0177] Therefore, the method for generating guidance signals according to an embodiment of the present invention can guide a user or moving object to walk or move to the center between lines by repeatedly performing the steps described above.

[0178] Figure 10 This is a schematic diagram illustrating the use of multiple magnetic patterns according to an embodiment of the present invention.

[0179] Reference Figure 10 In one embodiment of the present invention, at least two magnetic patterns 911 and 913 can be applied to both sides of a pedestrian road.

[0180] At this time, the first magnetic pattern 911 and the second magnetic pattern 913 applied to both sides of the pedestrian road form the same pattern based on one direction, so that the user carrying the pedestrian information recognition device 900 of an embodiment of the present invention can receive the same magnetic induction information.

[0181] Alternatively, when right-hand traffic is taken into account, the first magnetic pattern 911 located on the right side of the pedestrian forms a forward magnetic pattern, and the second magnetic pattern 913 located on the left side of the pedestrian forms a reverse pattern of the first magnetic pattern 911, so as to provide constant walking information regardless of the direction of pedestrian movement. Alternatively, additional magnetic patterns can be formed according to the direction of movement to include additional information.

[0182] At this time, the user's location carrying the pedestrian information recognition device 900 according to an embodiment of the present invention can be determined based on the strength of the magnetic fields of the first magnetic pattern 911 and the second magnetic pattern 913. For details, please refer to [link / reference]. Figure 10 describe.

[0183] In addition, the magnetic patterns 911 and 913 can be formed on both sides of the channel, thereby serving as a movable lane for vehicles or wheelchairs.

[0184] Figure 11 It is a graph representing the magnetic field strength based on the positions of multiple magnetic patterns and pedestrian information recognition devices.

[0185] Reference Figure 11 The position of the pedestrian information recognition device 1000 located between the first magnetic pattern 1011 and the second magnetic pattern 1013 can change according to the strength of the magnetic field of the first magnetic pattern 1011 and the second magnetic pattern 1013.

[0186] At this time, if the pedestrian information recognition device 1000 of an embodiment of the present invention approaches the first magnetic pattern 1011, the strength of the magnetic field of the first magnetic pattern 1011 will increase; if it approaches the second magnetic pattern 1013, the strength of the magnetic field of the second magnetic pattern 1013 will increase. Thus, the user carrying the pedestrian information recognition device 1000 of an embodiment of the present invention can know his / her own position on the pedestrian road.

[0187] In addition, the strength of the magnetic fields of their respective magnetic patterns 1011 and 1013 prevents users from walking into driveways or dangerous areas and guides them to safe roads.

[0188] At this time, the pedestrian information recognition device 1000 according to an embodiment of the present invention may include two magnetic sensors, and through this, the user may be guided to the middle of the pedestrian path as described above.

[0189] Figure 12 A schematic diagram showing a pattern of magnetic coating applied to the ground according to the present invention.

[0190] Existing tactile paving blocks for the visually impaired can only provide simple directional information. However, according to an embodiment of the present invention, magnetic coatings can be applied in the form of patterns or interactive patterns, thereby providing not only directional information but also location information or various other types of information.

[0191] Reference Figure 12 According to an embodiment of the present invention, the pattern of the magnetic coating applied to the ground 1130 can be formed by a one-dimensional pattern 1110 for one dimension and a two-dimensional pattern 1120 for two dimensions.

[0192] At this point, the one-dimensional pattern 1110 can set the N and S poles of the magnetic coating to 1 and 0 to provide information via binary signals.

[0193] At this point, referring to the example of one-dimensional pattern 1110, as shown in the table below, a magnetic pattern can be formed using only the N pole and the S pole, and position information (e.g., subway exit information) can be provided through the binary signal of the pattern.

[0194] Magnetic pattern information NNNNNNNS North Exit 1 NNNNNNSS North Exit 2 SSSSSSSN South Exit 1 SSSSSSNN South Exit 2 NNSSSNNN West Exit 1 NNNSSSNN West Exit 2 SSNNNSSS Exit 1 on the east side SSSNNNSS East Exit 2

[0195] Table 1

[0196] At this time, the two-dimensional pattern 1120 can be formed as a QR code (Quick Response code), which can include more information than the prior art. The above information is provided to the user through visual or auditory means by linking magnetic field detection devices (magnetic sensors) and user terminals.

[0197] In addition, the one-dimensional pattern 1110 and the two-dimensional pattern 1120 can include various colors, thereby combining magnetic and optical properties to embed various information.

[0198] In summary, the one-dimensional pattern 1110 and the two-dimensional pattern 1120 can be formed using only the N and S poles. Alternatively, the three colors red, green, and blue (RGB) can be added to form the pattern.

[0199] At this point, combining magnetic and optical properties allows for an exponential increase in the amount of information that can be embedded compared to using only magnetic properties to form patterns. Furthermore, it enables recording based on a hexadecimal system, which is more efficient than binary (N, S) operations, allowing for the recording of more information than per unit length or per unit area. This is because, when artificial intelligence is used in portable electronic communication devices, the accuracy of the displayed information is determined by the amount of initial input information, thereby improving the reliability of the information.

[0200] In other words, according to an embodiment of the present invention, the one-dimensional pattern 1110 and the two-dimensional pattern 1120 can be converted from a binary-bit magnetic pattern into a multi-bit pattern to provide more information.

[0201] Furthermore, in one embodiment of the present invention, a specific pattern can indicate the position of an optical pattern using a simple magnetic pattern, or vice versa, allowing the user to easily collect information. This will be referred to... Figure 14 Detailed description.

[0202] Furthermore, the specific pattern according to an embodiment of the present invention can be applied to flat sidewalk blocks without bumps or protrusions, which is easier and more affordable to construct than existing tactile paving blocks and allows for the setting of more information compared to bumpy blocks.

[0203] Furthermore, the specific pattern according to an embodiment of the present invention not only has the advantage of convenient construction, but also the advantage of being easily modified when it is necessary to change the internal information.

[0204] Furthermore, the specific pattern according to an embodiment of the present invention can be formed in various colors, thereby providing convenience and safety not only for visually impaired people, but also for ordinary pedestrians, and has the advantage of not limiting the color of the paint and ensuring aesthetics.

[0205] Furthermore, according to an embodiment of the present invention, a specific pattern can combine the magnetic signal of a magnetic pattern with the optical signal of an optical pattern to provide information, or the same magnetic signal and the same optical signal can be formed for complementary use.

[0206] For example, since a specific pattern in one embodiment of the present invention is recorded as N poles and S poles, magnetic signals and optical signals can be complementaryly utilized by representing each color corresponding to the polarity.

[0207] In addition, the specific pattern can have the same effect as lanes on roads using magnetic paint, and can be used to guide pedestrian movement and autopilot systems such as wheelchairs.

[0208] Figure 13 A table representing the information signals provided to each unit in the magnetic coating pattern.

[0209] In the composite pattern that combines the magnetic pattern and the optical pattern, since each element of the pattern can represent a lot of information, a lot of information can be recorded per unit length or per unit area.

[0210] In addition, two-dimensional patterns can provide exponential information compared to one-dimensional patterns, thus providing more information than existing QR codes.

[0211] Reference Figure 13 There is a significant difference in the amount of information that can be generated by a one-dimensional composite pattern with a constant length (e.g. 2) and two elements compared to a two-dimensional composite pattern with the same constant length (e.g. 2x2).

[0212] At this point, although a one-dimensional composite pattern can provide up to 36 types of information through two elements, a two-dimensional composite pattern of the same length can provide 1296 types of information.

[0213] Therefore, two-dimensional composite patterns, that is, a combination of magnetic and optical patterns, can record exponential information compared to one-dimensional composite patterns, and can provide users with more information.

[0214] Figure 14 A table showing examples of hexadecimal methods generated by composite patterns.

[0215] As described above, according to one embodiment of the present invention, magnetic patterns are processed with various colors, thereby transforming the magnetic patterns in binary form into multi-bit patterns, providing more information per unit length or per unit area.

[0216] When portable electronic communication devices utilize artificial intelligence, the amount of initial input information determines the accuracy and quantity of information displayed in the results.

[0217] Reference Figure 14 According to an embodiment of the present invention, the pattern can provide a binary signal consisting of 0 and 1 through a one-dimensional magnetic pattern formed by N poles and S poles, and can provide a hexadecimal signal consisting of 0, 1, 2, 3, 4, 5 by adding RGB (Red, Green, Blue) three color information, thereby providing more kinds of information per unit length or per unit area.

[0218] For example, converting the number 128 (decimal) to binary requires physical space to hold 8 digits (10,000,000). However, converting 128 (decimal) to quaternary requires only 4 positions (2000), and converting it to hexadecimal requires only 3 positions (332). This significantly reduces the physical space required, allowing for more diverse information to be provided per unit length or per unit area.

[0219] Figure 15 This is a diagram illustrating the generation of walking information during forward walking. Figure 16 This is a diagram illustrating the generation of walking information during reverse walking.

[0220] Reference Figure 15 and Figure 16 The patterns 1410 and 1510 generated by the magnetic coating should be readable not only in one direction, but also in both the forward and reverse directions. When the pedestrian information recognition device 1400 and 1500 of an embodiment of the present invention reads the pattern, they should be able to generate the same pedestrian information.

[0221] Therefore, according to an embodiment of the present invention, the patterns 1410 and 1510 are recorded as symmetrical or asymmetrical, so that pedestrians can clearly recognize their direction and thus the signals input from the patterns 1410 and 1510 can be processed differently.

[0222] Furthermore, according to an embodiment of the present invention, the patterns 1410 and 1510 are formed as magnetic patterns, thereby providing information about reaching the destination by using different frequencies of the patterns detected at the starting point and the frequencies of the patterns detected at the arrival position.

[0223] Furthermore, according to an embodiment of the present invention, patterns 1410 and 1510 are formed to have the same frequency at the starting point and the destination, and the frequency can be changed in the middle of the movement path to provide different patterns to the user.

[0224] In addition, in one embodiment of the present invention, the patterns 1410 and 1510 are formed as optical patterns. The symmetrical recording of the patterns ensures that the same information can be obtained regardless of the approach position, thereby preventing malfunction of the optical sensor (color detection device). Alternatively, specific optical patterns can be recorded at the beginning and end of the pattern to prevent malfunction of the color detection device.

[0225] Reference Figure 15 and Figure 16 Users carrying the pedestrian information recognition device 1400, 1500 according to an embodiment of the present invention can walk while recognizing a pattern composed of at least one magnetic pattern and an optical pattern.

[0226] At this time, patterns 1410 and 1510 can provide binary signals of 0 binary signals 1411 and 1511 and binary signals 1413 and 1513 through magnetic patterns or optical patterns, and the shape of each pattern can include movement direction information. Based on walking information, a directional shape can be formed according to the forward and reverse directions.

[0227] Reference Figure 15 and Figure 16 For example, patterns 1410 and 1510 can be formed into a positively oriented triangular shape, enabling the optical sensors included in the pedestrian information recognition devices 1400 and 1500 according to an embodiment of the present invention to determine the walking direction by recognizing the shape of the pattern.

[0228] Furthermore, as described above, the pedestrian information recognition devices 1400 and 1500 according to an embodiment of the present invention can distinguish between the positive and negative directions of the input signals embedded in the patterns 1410 and 1510 and perform different processing.

[0229] like Figure 15 As shown, when a pedestrian carrying a pedestrian forward recognition pattern 1410 of a pedestrian information recognition device 1400 according to an embodiment of the present invention walks, the signal input to the pedestrian information recognition device can be 01010010.

[0230] At this time, if the pedestrian information recognition device 1400 determines that the pattern 1410 input by the optical sensor is in a positive orientation, it can process the pedestrian information in a first-in-first-out (FIFO) manner and extract the pedestrian information. At this time, the pedestrian information can be 01010010.

[0231] In addition, such as Figure 16 As shown, when a pedestrian reverse identification pattern 1510 carrying a pedestrian information identification device 1500 according to an embodiment of the present invention is walking, the signal input to the pedestrian information identification device 1500 can be 01001010.

[0232] At this time, if the pedestrian information recognition device 1500 determines that the pattern 1510 input by the optical sensor is reversed, it can process the pedestrian information in a Last Input First Out (LIFO) manner and extract the pedestrian information. At this time, the pedestrian information can be 01010010.

[0233] Figure 17 This is a schematic diagram of controlling an optical sensor based on a magnetic induction signal.

[0234] According to one embodiment of the present invention, the magnetic patterns 1621, 1622, 1630 and the optical pattern 1610 may have different functions.

[0235] In one embodiment of the present invention, the magnetic coating or magnetic patterns 1621, 1622, 1630 only provide the direction for informing the position of the optical pattern 1610, and the optical pattern 1610 found at its position can share the role of providing various other information.

[0236] At this point, as described above, the optical pattern 1610 can use multiple colors as information units, thus providing more information than traditional methods. Examples of this information could be information about buildings located at the corresponding location, pedestrian walkways, surrounding tourist information, etc.

[0237] Since there is a risk of wasting power when the optical sensor is always working, and the capacity of the portable battery is limited, the optical sensor can be configured to operate only when specific magnetic patterns 1621 and 1622 are input.

[0238] by Figure 17 For example, the one-dimensional magnetic patterns 1621, 1622, and 1630 can provide the user with the current location and the location information of the optical pattern 1610.

[0239] At this point, the optical pattern 1610 is formed in two dimensions and can provide various information such as detailed information about the relevant location and surrounding tourist information.

[0240] At this time, the magnetic patterns 1621 and 1622 near the optical pattern 1610 are formed by a arbitrarily set specific pattern (e.g., 01010101), so that the optical sensor can be operated when the pedestrian information recognition device according to an embodiment of the present invention recognizes the magnetic patterns 1621 and 1622 having the specific pattern.

[0241] In addition, when a user carrying a pedestrian information recognition device according to an embodiment of the present invention walks in the opposite direction, the optical sensor should also be able to operate at the same position. Therefore, a mutually symmetrical pattern can be formed by magnetic patterns 1621 and 1622 that are symmetrically adjacent to each other with the optical pattern 1610 as the center.

[0242] exist Figure 17 Although the shadows of each pattern 1610, 1621, 1622, and 1630 are represented in two forms in the accompanying drawings, each pattern in this application is not limited to these forms. In addition, although the magnetic patterns 1621, 1622, and 1630 in the accompanying drawings are represented in one dimension and the optical pattern 1610 is represented in two dimensions, these patterns in this application are not limited to these forms.

[0243] Figure 18 This is a flowchart of a method for identifying pedestrian information using multiple magnetic sensors according to an embodiment of the present invention.

[0244] Reference Figure 18 According to an embodiment of the present invention, a method for identifying pedestrian information using multiple magnetic sensors includes: firstly, generating a magnetic induction signal S1701 from a magnetic coating applied to the ground.

[0245] In addition, a method for identifying walking information using multiple magnetic sensors according to an embodiment of the present invention includes: generating a frequency conversion signal S1703 using the magnetic induction signal.

[0246] In addition, a method for recognizing walking information using multiple magnetic sensors according to an embodiment of the present invention includes: generating walking information using the frequency conversion signal S1705.

[0247] At this time, the frequency conversion signal can be generated by detecting the magnetic induction signal at a preset period to generate a detection signal, dividing the detection signal into an average signal according to a preset number, and then performing frequency conversion on the average signal after collecting a preset conversion unit.

[0248] At this time, the magnetic induction signal may include: a first magnetic signal generated from the magnetic coating by a first magnetic sensor; and a second magnetic signal generated from the magnetic coating by a second magnetic sensor.

[0249] At this time, the frequency conversion signal can be generated by using a noise-reduced signal generated by the difference between the first magnetic signal and the second magnetic signal.

[0250] At this time, the noise-reduced signal can be generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

[0251] At this point, the pedestrian information recognition method using multiple magnetic sensors according to an embodiment of the present invention may further include: generating the direction information of the magnetic coating by using the time difference between receiving the first magnetic signal and the second magnetic signal.

[0252] At this time, the method for identifying walking information using multiple magnetic sensors according to an embodiment of the present invention further includes: generating an optical sensing signal from the magnetic coating. In this case, step S1705 can use at least one of the frequency conversion signal and the optical sensing signal to generate walking information.

[0253] At this time, the magnetic induction signal can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0254] At this time, the optical sensing signal can subdivide 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 that when only the magnetic induction signal is used.

[0255] Figure 19 This is a diagram illustrating a computer system according to an embodiment of the present invention.

[0256] Reference Figure 19 Embodiments of the present invention can be implemented in a computer system or a portable electronic device, such as a computer-readable recording medium. Figure 18 As shown, computer system 1800 may include at least one processor 1810, memory 1830, user interface input device 1840, user interface output device 1850, and memory 1860, all communicating with each other via bus 1820. Additionally, computer system 1800 may also include a network interface 1870 connected to network 1880. Processor 1810 may be a semiconductor device that executes processing instructions stored in central processing unit, memory 1830, or memory 1860. Memory 1830 and memory 1860 may be various forms of volatile or non-volatile storage media. For example, memory may include ROM 1831 or RAM 1832.

[0257] At this time, a pedestrian information recognition device utilizing multiple magnetic sensors according to an embodiment of the present invention may include: a magnetic sensor for generating a magnetic induction signal from a magnetic coating applied to the ground; a frequency conversion unit for generating a frequency conversion signal using the magnetic induction signal; and a control unit for generating pedestrian information using the frequency conversion signal.

[0258] At this time, the frequency conversion unit can generate a detection signal by detecting the magnetic induction signal at a preset period, divide the detection signal into an average signal according to a preset number, and generate the frequency conversion signal by collecting the average signal of a preset conversion unit and performing frequency conversion.

[0259] At this time, the magnetic induction signal may include: a first magnetic signal generated from the magnetic coating by a first magnetic sensor; and a second magnetic signal generated from the magnetic coating by a second magnetic sensor.

[0260] At this time, the frequency conversion signal can be generated by using a noise-reduced signal generated by the difference between the first magnetic signal and the second magnetic signal.

[0261] At this time, the noise-reduced signal can be generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

[0262] At this time, the control unit can use the time difference between receiving the first magnetic signal and the second magnetic signal to generate the direction information of the magnetic coating.

[0263] At this time, the pedestrian information recognition device utilizing multiple magnetic sensors according to an embodiment of the present invention may further include: an optical sensor for generating an optical sensing signal from the magnetic coating, wherein the control unit may generate pedestrian information using at least one of the frequency conversion signal and the optical sensing signal.

[0264] At this time, the magnetic induction signal can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0265] At this time, the optical sensing signal can subdivide 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 that when only the magnetic induction signal is used.

[0266] At this time, the control unit may correspond to the processor 1800 of the computer system. The magnetic sensor and the optical sensor may communicate with the processor 1800 via the bus 1820, and the generated magnetic induction signal and the optical sensing signal may be stored in the memory 1830 or the storage 1860.

[0267] Therefore, embodiments of the present invention can be implemented as a computer-implemented method or as a non-transitory computer-readable medium recording computer-executable instructions. When the computer-readable instructions are executed by a processor, they can perform a method according to at least one aspect of the present invention.

[0268] In addition, according to one embodiment of the present invention, instead of tactile paving blocks with uneven surfaces, magnetic coatings or coatings of various colors are used on general tactile paving blocks without uneven surfaces to record magnetic or optical information as one-dimensional or two-dimensional patterns, which are read by magnetic sensors or optical sensors respectively, thereby providing walking information not only to visually impaired people, but also to ordinary people.

[0269] In addition, according to one embodiment of the present invention, one-dimensional patterns and two-dimensional patterns are applied simultaneously on the pedestrian block, and each magnetic and optical information can be detected and utilized complementaryly, thereby providing a significant reduction in the malfunction of the sensor that detects each piece of information.

[0270] At this point, the walking information provided can be information related to the location and direction of movement of the pattern, as well as various other information that the construction worker wants to convey.

[0271] Therefore, in one embodiment of the present invention, a magnetic field detection device or an optical detection device for distinguishing colors (color detection device) can be used in combination to identify the information, and can be linked with a user terminal, such as a portable electronic communication device, to convey more information to pedestrians in an auditory or visual manner.

[0272] One embodiment is not limited to sidewalk blocks; it can also be implemented by applying coatings with magnetic and optical information to the ground or other surfaces, and can also be applied to objects that move using it and systems that operate such objects.

[0273] In addition, one embodiment of the present invention includes at least one magnetic sensor for recognizing the magnetic pattern, and a noise-reduced signal is generated by the difference between the signals input to each magnetic sensor, and magnetic information can also be detected by the noise-reduced signal.

[0274] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0275] Figure 20 This is a usage diagram of a pedestrian information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention.

[0276] Reference Figure 20 According to an embodiment of the present invention, the pedestrian information recognition device 2010 utilizing magnetic / optical patterns is made in the form of a stick so that it can be carried by a user (pedestrian, etc.) and can be configured to recognize information stored in the magnetic coating 2020 applied to the ground 2030.

[0277] At this time, magnetic coating 2020 can form specific patterns by utilizing the properties of magnetism, or by utilizing the optical properties of different colors.

[0278] At this time, the pedestrian information recognition device 2010 according to an embodiment of the present invention can identify the pedestrian information inherent in the specific pattern of the magnetic paint 2020 applied to the ground and provide it to the user.

[0279] At this point, walking information can include all the information needed for walking, such as current location, surrounding buildings, tourist information, and walking route range.

[0280] Figure 21 This is a schematic diagram illustrating a pattern of magnetic coating applied to the ground according to the present invention.

[0281] Existing tactile paving blocks for the visually impaired can only provide simple directional information. However, according to an embodiment of the present invention, magnetic coatings can be applied in the form of patterns or interactive patterns, thereby providing not only directional information but also location information or various other types of information.

[0282] Reference Figure 21 According to an embodiment of the present invention, the pattern of the magnetic coating applied to the ground 2130 can be formed by a one-dimensional pattern 2110 for one dimension and a two-dimensional pattern 2120 for two dimensions.

[0283] At this point, the one-dimensional pattern 2110 can set the N and S poles of the magnetic coating to 1 and 0 to provide information via binary signals.

[0284] At this point, referring to the example of one-dimensional pattern 2110, as described in [Table 1], a magnetic pattern can be formed using only the N pole and the S pole, and position information (e.g., subway exit information) can be provided through the binary signal of the pattern.

[0285] At this time, the two-dimensional pattern 2120 can be formed as a QR code (Quick Response code), which can include more information than the prior art. The above information is provided to the user through visual or auditory means by linking magnetic field detection devices (magnetic sensors) and user terminals.

[0286] In addition, the one-dimensional pattern 2110 and the two-dimensional pattern 2120 can include various colors, thereby combining magnetic and optical properties to embed various information.

[0287] In summary, the one-dimensional pattern 2110 and the two-dimensional pattern 2120 can be formed using only the N and S poles. Alternatively, the three colors red, green, and blue (RGB) can be added to form the pattern.

[0288] At this point, combining magnetic and optical properties allows for an exponential increase in the amount of information that can be embedded compared to using only magnetic properties to form patterns. Furthermore, it enables recording based on hexadecimal, which is more efficient than binary (N, S) operations, and can record more information than per unit length or per unit area.

[0289] This is because when artificial intelligence is used in portable electronic communication devices, the accuracy of the displayed information is determined by the amount of initial input information, thereby improving the reliability of the information.

[0290] In other words, according to an embodiment of the present invention, the one-dimensional pattern 2110 and the two-dimensional pattern 2120 can be converted from a magnetic pattern in binary form to a multi-bit pattern to provide more information.

[0291] Furthermore, in one embodiment of the present invention, a specific pattern can indicate the position of an optical pattern using a simple magnetic pattern, or vice versa, allowing the user to easily collect information. This will be referred to... Figure 27 Detailed description.

[0292] Furthermore, the specific pattern according to an embodiment of the present invention can be applied to flat sidewalk blocks without bumps or protrusions, which is easier and more affordable to construct than existing tactile paving blocks and allows for the setting of more information compared to bumpy blocks.

[0293] Furthermore, the specific pattern according to an embodiment of the present invention not only has the advantage of convenient construction, but also the advantage of being easily modified when it is necessary to change the internal information.

[0294] Furthermore, the specific pattern according to an embodiment of the present invention can be formed in various colors, thereby providing convenience and safety not only for visually impaired people, but also for ordinary pedestrians, and has the advantage of not limiting the color of the paint and ensuring aesthetics.

[0295] Furthermore, according to an embodiment of the present invention, a specific pattern can combine the magnetic signal of a magnetic pattern with the optical signal of an optical pattern to provide information, or the same magnetic signal and the same optical signal can be formed for complementary use.

[0296] For example, since a specific pattern in one embodiment of the present invention is recorded as N poles and S poles, magnetic signals and optical signals can be complementaryly utilized by representing each color corresponding to the polarity.

[0297] In addition, the specific pattern can have the same effect as lanes on roads using magnetic paint, and can be used to guide pedestrian movement and autopilot systems such as wheelchairs.

[0298] Figure 22A table representing the information signals provided to each unit in the magnetic coating pattern.

[0299] In the composite pattern that combines the magnetic pattern and the optical pattern, since each element of the pattern can represent a lot of information, a lot of information can be recorded per unit length or per unit area.

[0300] In addition, two-dimensional patterns can provide exponential information compared to one-dimensional patterns, thus providing more information than existing QR codes.

[0301] Reference Figure 22 There is a significant difference in the amount of information that can be generated by a one-dimensional composite pattern with a constant length (e.g. 2) and two elements compared to a two-dimensional composite pattern with the same constant length (e.g. 2x2).

[0302] At this point, although a one-dimensional composite pattern can provide up to 36 types of information through two elements, a two-dimensional composite pattern of the same length can provide 1296 types of information.

[0303] Therefore, two-dimensional composite patterns, that is, a combination of magnetic and optical patterns, can record exponential information compared to one-dimensional composite patterns, and can provide users with more information.

[0304] Figure 23 A table showing examples of hexadecimal methods generated by composite patterns.

[0305] As described above, according to one embodiment of the present invention, magnetic patterns are processed with various colors, thereby transforming the magnetic patterns in binary form into multi-bit patterns, providing more information per unit length or per unit area.

[0306] This is because when portable electronic communication devices utilize artificial intelligence, the amount of initial input information determines the accuracy of the information displayed in the results, thereby improving the reliability of the information.

[0307] Reference Figure 23 According to an embodiment of the present invention, the pattern can provide a binary signal consisting of 0 and 1 through a one-dimensional magnetic pattern formed by N poles and S poles, and can provide a hexadecimal signal consisting of 0, 1, 2, 3, 4, 5 by adding RGB (Red, Green, Blue) three color information, thereby providing more kinds of information per unit length or per unit area.

[0308] For example, converting the number 128 (decimal) to binary requires physical space to accommodate 8 bits (10,000,000). However, converting 128 (decimal) to quaternary requires 2,000 bits to accommodate 4 positions, and converting it to hexadecimal requires only 3 bits (332). This significantly reduces physical space, allowing for more diverse information to be provided per unit length or per unit area.

[0309] Figure 24 This is a diagram illustrating the generation of walking information during forward walking. Figure 25 This is a diagram illustrating the generation of walking information during reverse walking.

[0310] Reference Figure 24 and Figure 25 The patterns 2410 and 2510 generated by the magnetic coating should be readable not only in one direction, but also in both the forward and reverse directions. When the pedestrian information recognition device 2400 and 2500 of an embodiment of the present invention reads the pattern, they should be able to generate the same pedestrian information.

[0311] Therefore, according to an embodiment of the present invention, the patterns 2410 and 2510 are recorded as symmetrical or asymmetrical, so that pedestrians can clearly recognize their direction, and thus the signals input from the patterns 2410 and 2510 can be processed differently.

[0312] Furthermore, according to an embodiment of the present invention, the patterns 2410 and 2510 are formed as magnetic patterns, thereby providing information about reaching the destination by varying the frequencies of the patterns detected at the starting point and the frequencies of the patterns detected at the arrival position.

[0313] Furthermore, according to an embodiment of the present invention, patterns 2410 and 2510 are formed as patterns with the same frequency at the starting point and the destination, and the frequency can be changed in the middle of the movement path to provide different patterns to the user.

[0314] In addition, in one embodiment of the present invention, the patterns 2410 and 2510 are formed as optical patterns and the patterns are symmetrically recorded so that the same information can be obtained no matter which position is approached, thereby preventing malfunction of the optical sensor (color detection device). Alternatively, specific optical patterns can be recorded at the beginning and end of the pattern to prevent malfunction of the color detection device.

[0315] Reference Figure 25 and Figure 25 Users carrying a pedestrian information recognition device 2400 or 2500 according to an embodiment of the present invention can walk while recognizing a pattern composed of at least one magnetic pattern and an optical pattern.

[0316] At this time, patterns 2410 and 2510 can provide binary signals of 0 binary signals 2411 and 2511 and 1 binary signals 2413 and 2513 through magnetic patterns or optical patterns, and the shape of each pattern can include movement direction information. Based on walking information, a directional shape can be formed according to the forward and reverse directions.

[0317] Reference Figure 24 and Figure 25 For example, patterns 2410 and 2510 can be formed into a positively oriented triangular shape, enabling the optical sensors included in the pedestrian information recognition devices 2400 and 2500 according to an embodiment of the present invention to determine the walking direction by recognizing the shape of the pattern.

[0318] Furthermore, as described above, the pedestrian information recognition devices 2400 and 2500 according to an embodiment of the present invention can distinguish between the positive and negative directions of the input signals embedded in the patterns 2410 and 2510 and perform different processing.

[0319] like Figure 24 As shown, when the sole of the shoe is walking on the pedestrian forward recognition pattern 2410 of the walking information recognition device 2400 of an embodiment of the present invention, the signal input to the walking information recognition device can be 01010010.

[0320] At this time, if the pedestrian information recognition device 2400 determines that the pattern 2410 input by the optical sensor is in the positive direction, it can process the pedestrian information in a first-in-first-out (FIFO) manner and extract the pedestrian information. At this time, the pedestrian information can be 01010010.

[0321] In addition, such as Figure 25 As shown, when a pedestrian reverse identification pattern 2510 carrying a pedestrian information identification device 2500 according to an embodiment of the present invention is walking, the signal input to the pedestrian information identification device 2500 can be 01001010.

[0322] At this time, if the pedestrian information recognition device 2500 determines that the pattern 2510 input by the optical sensor is reversed, it can process the pedestrian information in a Last Input First Out (LIFO) manner and extract the pedestrian information. At this time, the pedestrian information can be 01010010.

[0323] Figure 26 This is a schematic diagram illustrating communication with a user terminal according to an embodiment of the present invention.

[0324] Reference Figure 26A pedestrian information recognition device 7260 according to an embodiment of the present invention includes a magnetic sensor and / or an optical sensor for detecting a pattern (magnetic pattern and / or optical pattern) 2620 formed on a ground 2630. The device can use wired or wireless communication to provide pedestrian information to a user terminal (portable electronic communication device) 2640 such as a mobile phone by transmitting the signal detected by the magnetic sensor and / or the optical sensor.

[0325] At this time, the signal detected by the magnetic sensor can be converted into a tactile (e.g., vibration) or auditory (e.g., sound) signal by the user terminal 2640 and provided to the user, and the signal detected by the optical sensor can be provided visually by the display screen of the user terminal 2640.

[0326] As mentioned above, the reason for providing different methods is to improve the efficiency and quantity of information delivery to users within the same timeframe.

[0327] Figure 27 This is a schematic diagram of controlling an optical sensor based on magnetic induction information.

[0328] According to one embodiment of the present invention, the magnetic patterns 2721, 2722, 2730 and the optical pattern 2710 may be configured to have different functions.

[0329] In one embodiment of the present invention, the magnetic coating or magnetic patterns 2721, 2722, 2730 only provide the direction for informing the position of the optical pattern 2710, and the optical pattern 2710 found at its position can share the role of providing various other information.

[0330] At this point, as described above, the optical pattern 2710 can use multiple colors as information units, thus providing more information than traditional methods. Examples of this information could be information about buildings located at a corresponding location, pedestrian walkways, surrounding tourist information, etc.

[0331] Since there is a risk of wasting power when the optical sensor is always working, and the capacity of the portable battery is limited, the optical sensor can be configured to operate only when specific magnetic patterns 2721 and 2722 are input.

[0332] by Figure 27 For example, magnetic patterns 2721, 2722, and 2730 formed in one dimension can provide the user with the current location and the location information of optical pattern 2710.

[0333] At this point, the optical pattern 2710 is formed in two dimensions and can provide various information such as detailed information about the relevant location and surrounding tourist information.

[0334] At this time, the magnetic patterns 2721 and 2722 near the optical pattern 2710 are formed by a arbitrarily set specific pattern (e.g., 01010101), so that the optical sensor can be operated when the pedestrian information recognition device according to an embodiment of the present invention recognizes the magnetic patterns 2721 and 2722 having the specific pattern.

[0335] In addition, when a user carrying a pedestrian information recognition device according to an embodiment of the present invention walks in the opposite direction, the optical sensor should also be able to operate at the same position. Therefore, a mutually symmetrical pattern can be formed by magnetic patterns 2721 and 2722 that are symmetrically adjacent to each other with the optical pattern 2710 as the center.

[0336] exist Figure 27 Although the shadows of each pattern 2710, 2721, 2722, and 2730 are represented in two forms in the accompanying drawings, each pattern in this application is not limited to these forms. In addition, although the magnetic patterns 2721, 2722, and 2730 in the accompanying drawings are represented in one dimension and the optical pattern 2710 is represented in two dimensions, these patterns in this application are not limited to these forms.

[0337] Figure 28 This is a schematic diagram illustrating the use of two magnetic patterns according to an embodiment of the present invention.

[0338] Reference Figure 28 In one embodiment of the present invention, at least two magnetic patterns 2811 and 2813 can be applied to both sides of a pedestrian road.

[0339] At this time, the first magnetic pattern 2811 and the second magnetic pattern 2813 applied to both sides of the pedestrian road form the same pattern based on one direction, so that the user carrying the pedestrian information recognition device 2800 of an embodiment of the present invention can receive the same magnetic induction information.

[0340] Alternatively, when right-hand traffic is taken into account, the first magnetic pattern 2811 located on the right side of the pedestrian forms a forward magnetic pattern, and the second magnetic pattern 2813 located on the left side of the pedestrian forms a reverse pattern of the first magnetic pattern 2811, so as to provide constant walking information regardless of the direction of pedestrian movement. Alternatively, additional magnetic patterns can be formed according to the direction of movement to include additional information.

[0341] At this time, the user's location carrying the pedestrian information recognition device 2800 according to an embodiment of the present invention can be determined based on the strength of the magnetic fields of the first magnetic pattern 2811 and the second magnetic pattern 2813. For details, please refer to [link / reference]. Figure 29 describe.

[0342] In addition, the magnetic patterns 2811 and 2813 can be formed on both sides of the channel, thereby serving as a movable lane for vehicles or wheelchairs.

[0343] Figure 29 It is a graph representing the magnetic field strength based on the positions of two magnetic patterns and the pedestrian information recognition device.

[0344] Reference Figure 29 The position of the pedestrian information recognition device 2900 located between the first magnetic pattern 2911 and the second magnetic pattern 2913 can change according to the strength of the magnetic field of the first magnetic pattern 2911 and the second magnetic pattern 2913.

[0345] At this time, if the pedestrian information recognition device 2900 of an embodiment of the present invention approaches the first magnetic pattern 2911, the strength of the magnetic field of the first magnetic pattern 2911 will increase; if it approaches the second magnetic pattern 2913, the strength of the magnetic field of the second magnetic pattern 2913 will increase. Thus, the user carrying the pedestrian information recognition device 2900 of an embodiment of the present invention can know his / her own position on the pedestrian road.

[0346] In addition, by using the strength of the magnetic fields of their respective magnetic patterns 2911 and 2913, users are prevented from walking into driveways or dangerous areas, and are guided to safe roads.

[0347] At this time, the pedestrian information recognition device 2900 according to an embodiment of the present invention can be described as follows: Figure 30 The configuration shown includes two magnetic sensors, which can also guide the user to the middle of the pedestrian path as described above.

[0348] Figure 30 This is a structural diagram of a pedestrian information recognition device including two magnetic sensors according to an embodiment of the present invention.

[0349] Reference Figure 30 According to an embodiment of the present invention, the pedestrian information recognition device 2010 is made in the form of a stick so that it can be carried by a user (pedestrian, etc.) and includes two magnetic sensors 3021 and 3023 that can detect magnetic signals from the left and right sides of the stick, and may include a center mark 3010 that can distinguish the center of the stick.

[0350] Figure 31 This is a flowchart of generating pedestrian guidance signals according to an embodiment of the present invention.

[0351] according to Figure 30In one embodiment of the present invention shown, two magnetic sensors 3021 and 3023 are installed at different locations on the pedestrian information recognition device 2010. By using the relative signals detected by the two sensors, at least one magnetic coating applied to the ground can be distinguished.

[0352] In addition, according to one embodiment of the present invention, magnetic coating can be applied to the ground in the form of lines to guide users or moving objects such as wheelchairs to the middle between the lines.

[0353] At this time, the method for generating the guidance signal according to an embodiment of the present invention can be initialized by first substituting 0 into the variable t, defining the output of the first magnetic sensor 3023 located on the right side of the pedestrian information recognition device according to an embodiment of the present invention as SR (t=0), and defining the output of the second magnetic sensor 3021 located on the left side as SL (t=0) for S3101.

[0354] At this point, the variable t can correspond to time, and SR(t) and SL(t) can correspond to the output of each magnetic sensor according to time.

[0355] In addition, according to an embodiment of the present invention, the method for generating a guiding signal can, as time changes, define the SR(t) and SL(t) corresponding to each time as corresponding to the time S3102, and compare the SR(t) and SL(t) S3103.

[0356] In this embodiment of the present invention, in the method for generating a guiding signal, when SR(t) is greater than SL(t), a signal to move to the left can be generated S3107, and when SR(t) is not greater than SL(t), it is possible to compare whether SR(t) and SL(t) are the same S3105.

[0357] At this time, the method for generating a guiding signal according to an embodiment of the present invention can return to the beginning and repeat the steps if SL(t) and SR(t) are the same, and generate a rightward moving signal S3109 if SL(t) and SR(t) are different.

[0358] At this time, according to an embodiment of the present invention, after generating a signal to move left or right, in order to determine the user's current position again, the method for generating a guidance signal can substitute null value S1111 into SR(t) and SL(t), substitute t+1 into variable t, and re-execute from step S3102.

[0359] Therefore, the method for generating guidance signals according to an embodiment of the present invention can guide a user or moving object to walk or move to the center between lines by repeatedly performing the steps described above.

[0360] Figure 32 This is a block diagram of a pedestrian information recognition device according to an embodiment of the present invention.

[0361] Reference Figure 32 According to an embodiment of the present invention, the pedestrian information recognition device 2010 may include a magnetic sensor 3211, an analog-to-digital converter (ADC) 3213, and a processor (e.g., MCU, MICOM, etc.) 3215.

[0362] In addition, although Figure 32 Not shown, but as described above, the pedestrian information recognition device 2010 of one embodiment of the present invention may also include an optical sensor, and pedestrian information may be recognized by optical sensing signals input to the optical sensor.

[0363] At this time, the pedestrian information recognition device 2010 according to an embodiment of the present invention can generate pedestrian information from the magnetic coating on the ground, and provide the pedestrian information to the user terminal 3220 through wired or wireless communication or other means.

[0364] At this time, the magnetic sensor 3211 can detect the magnetic signal from the magnetic coating on the ground.

[0365] At this point, since the magnetic signal can be an analog signal, it is converted into a digital signal by the analog-to-digital converter 3213, as described below.

[0366] At this point, the magnetic sensor 3211 can also detect noise signals based on the environment in which the Earth's magnetic field or the surrounding ferromagnetic field is generated or guided. Therefore, in this case, a magnetic sensor that detects dynamic signals can be used instead of a magnetic sensor that detects static signals.

[0367] A magnetic sensor that detects dynamic signals cannot detect a signal when the magnetic coating containing recorded magnetic information is stationary; it can only detect a signal when the surface is in motion. In other words, a sensor capable of detecting magnetic signals that change over time can be used.

[0368] At this time, the analog-to-digital converter 3213 can convert the analog magnetic signal detected by the magnetic sensor into a digital signal for processing on the processor 3215.

[0369] At this time, the analog-to-digital converter 3213 can be an ADC with a resolution of 12 bits or more and a sampling rate of 1 kS / s or more.

[0370] At this time, the processor 3215 can process the digital signal transformed by the analog-to-digital converter 3213 to generate walking information.

[0371] More specifically, the processor 3215 can perform a Fast Fourier Transform (FFT) on the digital signal to extract the period, i.e., the frequency, of the pattern recorded on the magnetic coating.

[0372] At this time, the processor 3215 can generate the walking information based on the frequency to convey it to the user terminal 3220, and the walking information analyzed from the signal detection process during the fast Fourier transform is preferably conveyed to the user terminal 3220 within 1 second.

[0373] At this time, the communication method for conveying the walking information can be a short-range wireless communication method or a wired communication method, such as Wi-Fi, near field communication (NFC), Bluetooth, etc.

[0374] Figure 33 A graph illustrating the process of generating a frequency-converted signal according to an embodiment of the present invention.

[0375] Reference Figure 33 The curve 1310 on the left is a curve obtained by measuring the field programmable gate array (FPGA) using a magnetic sensor after constructing the magnetic interaction pattern corresponding to 60Hz.

[0376] At this point, the curve 3310 on the left is a graph showing the 1024 signals collected in 1.024 seconds, obtained by detecting a signal from an analog magnetic sensor once every 5 microseconds using an FPGA and taking the average of 200 detected signals as a single signal.

[0377] At this point, the minimum and maximum intensity widths (amplitudes) of curve 3310 on the left can vary within a signal range of approximately 100mV (about 2.62V-2.52V).

[0378] The curve 3320 on the right is the result curve after performing a Fast Fourier Transform on the 1024 signals. When the magnetic interactive pattern is applied to a frequency corresponding to 60Hz, the result of the transformed signal detected by the magnetic sensor shows that the 60Hz signal 3321 is clearly distinguishable from other signals. Therefore, the magnetic pattern signal can be used to provide walking information, etc. That is, because magnetic signals are very sensitive to noise and have the characteristic of large variations in measured values ​​relative to various noise levels, it is difficult to obtain the required walking information from the magnetic signals measured by the coated paint if it cannot be effectively measured. Therefore, by collecting a sufficient number of detection signals to calculate the average value, and then performing a frequency transformation on the calculated average value, the required frequency pattern can be detected from the magnetic paint coated on the ground.

[0379] However, when detecting magnetic signals from a single magnetic sensor, the means to reduce noise are somewhat insufficient. Therefore, as described below, two magnetic sensors can be used to reduce noise in order to more precisely detect the frequency corresponding to the magnetic interaction pattern.

[0380] Figure 34 This is a structural diagram of a pedestrian information recognition device that integrates two magnetic sensors in the same direction according to an embodiment of the present invention.

[0381] Reference Figure 34 According to an embodiment of the present invention, the pedestrian information recognition device 2010 is made in the form of a stick so that it can be carried by a user (pedestrian, etc.) while walking. Two magnetic sensors 3425 and 3427 capable of detecting magnetic signals are integrated on one side of the stick, and it may include a center mark 3410 capable of distinguishing the center of the stick.

[0382] At this time, the first magnetic sensor 3425 and the second magnetic sensor 3427 for detecting magnetic signals can be located on the same side of the rod so that the same magnetic signals can be detected at certain intervals.

[0383] In addition, a pedestrian information recognition device 2010 according to an embodiment of the present invention can integrate two magnetic sensors 3425 and 3427 that detect magnetic fields in different directions respectively.

[0384] To elaborate further, either of the two magnetic sensors 3425 or 3427 can be installed in the pedestrian information recognition device 2010 in an orientation that enables the detection of a vertical magnetic field, while the other magnetic sensors 3427 or 3425 can be installed in the pedestrian information recognition device 2010 in an orientation that enables the detection of a horizontal magnetic field.

[0385] At this point, if the magnetic field in the vertical direction is the strongest in the paint with the magnetic pattern applied, then the magnetic field signal in the horizontal direction is relatively weak.

[0386] At this time, the pedestrian information recognition device according to an embodiment of the present invention can be integrated to enable the first magnetic sensor 3425 to detect a first magnetic signal corresponding to a vertical magnetic field and the second magnetic sensor 3427 to detect a second magnetic signal corresponding to a horizontal magnetic field.

[0387] At this time, as described below, the pedestrian information recognition device 2010 according to an embodiment of the present invention can reduce the ambient noise signal based on the two signals by utilizing the difference in the magnetic signals detected in each magnetic sensor 3425, 3427, and thereby clearly read the signal to be detected in the coating.

[0388] In this case, the difference in the signal can be achieved by utilizing the detection time difference between the two sensors.

[0389] Figure 35 This is a block diagram of a pedestrian information recognition device including two magnetic sensors according to an embodiment of the present invention.

[0390] Reference Figure 35 According to an embodiment of the present invention, the pedestrian information recognition device 2010 may include a first magnetic sensor 3511-1, a second magnetic sensor 3511-2, an analog-to-digital converter (ADC) 1513, and a processor (e.g., MCU, MICOM, etc.) 3515.

[0391] At this time, according to an embodiment of the pedestrian information recognition device 2010 of the present invention, such as an embodiment including a magnetic sensor, pedestrian information can be generated from magnetic coating on the ground, and the pedestrian information can be provided to the user terminal 3520 through wired or wireless communication or other means.

[0392] At this time, the first magnetic sensor 3511-1 and the second magnetic sensor 3511-2 can detect magnetic signals from the magnetic coating on the ground. At this time, the same magnetic signal needs to be detected from the same magnetic coating, and the detection can be performed at certain intervals.

[0393] At this point, since the magnetic signal can be an analog signal, it is converted into a digital signal by the analog-to-digital converter 3513, as described below.

[0394] At this point, magnetic sensors 3511-1 and 3511-2 can also detect noise signals based on the environment in which the Earth's magnetic field or the surrounding ferromagnetic field is generated or guided. Therefore, in this case, a magnetic sensor that detects dynamic signals can be used instead of a magnetic sensor that detects static signals.

[0395] A magnetic sensor that detects dynamic signals cannot detect a signal when the magnetic coating containing recorded magnetic information is stationary; it can only detect a signal when the surface is in motion. In other words, a sensor capable of detecting this signal as it changes over time can be used.

[0396] At this time, the analog-to-digital converter 3513 can convert the analog magnetic signals detected by the first magnetic sensor 3511-1 and the second magnetic sensor 3511-2 into digital signals for processing on the processor 3515.

[0397] At this time, the analog magnetic signals detected by the first magnetic sensor 3511-1 and the second magnetic sensor 3511-2 can be the differences between the various analog magnetic signals detected by the first magnetic sensor 3511-1 and the second magnetic sensor 3511-2. More specifically, refer to... Figure 36 Describe it.

[0398] At this time, the analog-to-digital converter 3513 can be an ADC with a resolution of 12 bits or more and a sampling rate of 1 kS / s or more.

[0399] At this point, the processor 3515 can process the digital signal transformed by the analog-to-digital converter 1513 to generate walking information.

[0400] More specifically, the processor 3515 can perform a Fast Fourier Transform (FFT) on the digital signal to extract the period, i.e., the frequency, of the pattern recorded on the magnetic coating.

[0401] At this time, the processor 3515 can generate the walking information based on the frequency to convey it to the user terminal 3520, and the walking information analyzed from the signal detection process of the fast Fourier transform is preferably conveyed to the user terminal within 1 second.

[0402] At this time, the communication method for conveying the walking information can be a short-range wireless communication method or a wired communication method, such as Wi-Fi, near field communication (NFC), Bluetooth, etc.

[0403] Figure 36 The graph represents the process of generating a noise-reduced signal according to an embodiment of the present invention.

[0404] Reference Figure 36 According to one embodiment of the present invention, a pedestrian information recognition device including two magnetic sensors can detect the same magnetic signal at a certain time interval.

[0405] For example, if the source of the magnetic signal is closer to the first magnetic sensor than the second magnetic sensor, the first magnetic signal 3610 detected by the first magnetic sensor can detect t2-t1 faster than the second magnetic signal 3620 detected by the second magnetic sensor.

[0406] However, the noise signal 3611 detected by the first magnetic sensor and the noise signal 3621 detected by the second magnetic sensor are input within the same time period, with no time difference.

[0407] Therefore, by calculating the difference between the first magnetic signal 3611 and the second magnetic signal 3620, a noise-reduced signal 3630 with the noise signal 3631 removed can be generated, thereby allowing for a more precise extraction of the frequencies recorded in the magnetic coating.

[0408] At this time, the noise reduction signal 3630 can be the difference between the average signal corresponding to the first magnetic signal 3610 and the average signal corresponding to the second magnetic signal 3602.

[0409] At this time, the first magnetic signal 3610 and the second magnetic signal 3620 may have detected either the same horizontal magnetic field or the same vertical magnetic field, or they may have detected different horizontal magnetic fields or vertical magnetic fields.

[0410] Figure 37 The graph represents the process of generating a frequency-converted signal from a noise-reduced signal according to an embodiment of the present invention.

[0411] Reference Figure 37 The curve on the left, as shown in Figure 3710. Figure 32 As shown, after the construction corresponds to the magnetic interaction pattern at 60Hz, the difference between the first magnetic signal and the second magnetic signal is represented by the first magnetic sensor and the second magnetic sensor, which is the curve of the noise reduction signal.

[0412] As mentioned above, by using two magnetic sensors to reduce noise, the frequencies recorded in the magnetic coating can be extracted more precisely.

[0413] At this time, the curve 3710 on the left can be a curve representing 1024 signals collected in 1.024 seconds, where the difference between the first magnetic signal and the second magnetic signal is detected by the FPGA every 5us, and the average value of 200 detected signals is taken as a signal.

[0414] Alternatively, the curve 3710 on the left can be a graph representing the first magnetic signal and the second magnetic signal detected by the FPGA every 5µs, the average value of 200 detected signals calculated, and the difference between the average values ​​of the signals collected in 1.024 seconds.

[0415] At this point, the width (amplitude) of the minimum and maximum intensity of the curve 3710 on the left can vary within a signal of approximately 100mV (approximately 2.62V-2.52V), which is about 3 times smaller than the case detected using a magnetic sensor (2.62V-2.52V=100mV).

[0416] The curve 3720 on the right is the result curve after performing a fast Fourier transform on the 1024 signals. By coloring the magnetic interaction pattern to correspond to 60Hz and then detecting it, it can be seen from the result of transforming the noise reduction signal that high frequencies such as 60Hz, 120Hz, and 180Hz are more likely to appear for 60Hz, so the magnetic pattern of 60Hz 3721 can be clearly distinguished.

[0417] Figure 38 This is a flowchart of a pedestrian information recognition method using magnetic / optical patterns according to an embodiment of the present invention.

[0418] refer to Figure 38 According to one embodiment of the present invention, the method for recognizing pedestrian information using magnetic / optical patterns first generates magnetic induction information S3801 from magnetic coating on the ground using a magnetic sensor.

[0419] In addition, in one embodiment of the present invention, the method for recognizing pedestrian information using magnetic / optical patterns generates optical sensing information S3803 from the magnetic coating using an optical sensor.

[0420] In addition, a method for recognizing pedestrian information using magnetic / optical patterns according to an embodiment of the present invention generates pedestrian information S3805 by using at least one of the magnetic induction information and the optical sensing information.

[0421] In addition, an embodiment of the present invention provides user information S3807 corresponding to the walking information using a walking information recognition method based on magnetic / optical patterns.

[0422] At this time, the magnetic induction information can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0423] At this time, the optical sensing information can subdivide the magnetic pattern corresponding to the magnetic induction information so that the amount of information per unit length or per unit area is greater than that when only the magnetic induction information is used.

[0424] In this case, in the method for recognizing pedestrian information using magnetic / optical patterns according to an embodiment of the present invention, the way in which the magnetic induction information is used to generate the pedestrian information may change based on the optical sensing information.

[0425] At this time, the walking information, in addition to the magnetic induction information and the optical sensing information, can be generated using the sensor information of the user terminal.

[0426] At this time, the user terminal sensor information can be used to correct at least one of the magnetic induction information and the optical sensing information.

[0427] At this time, the magnetic induction information can be used to control the optical sensor.

[0428] Figure 39 This is a diagram illustrating a computer system according to an embodiment of the present invention.

[0429] Reference Figure 39 Embodiments of the present invention can be implemented in a computer system or a portable electronic device, such as a computer-readable recording medium. Figure 39 As shown, the computer system 3900 may include at least one processor 3910, memory 3930, user interface input device 3940, user interface output device 3950, and memory 3960, all communicating with each other via a bus 3920. Additionally, the computer system 3900 may also include a network interface 3970 connected to a network 3980. The processor 3910 may be a semiconductor device that executes processing instructions stored in the central processing unit, memory 3930, or memory 3960. Memory 3930 and memory 3960 may be various forms of volatile or non-volatile storage media. For example, memory may include ROM 3931 or RAM 3932.

[0430] At this time, a pedestrian information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention includes: a magnetic sensor for generating magnetic induction information from a magnetic coating applied to the ground; an optical sensor for generating optical sensing information from the magnetic coating; and a control unit for generating pedestrian information using at least one of the magnetic induction information and the optical sensing information, and providing user information corresponding to the pedestrian information.

[0431] At this time, the control unit may correspond to the processor 3900 of the computer system. The magnetic sensor and the optical sensor may communicate with the processor 3900 via the bus 3920, and the generated magnetic induction information and optical sensing information may be stored in the memory 3930 or the storage 3960.

[0432] At this time, the magnetic induction information can correspond to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

[0433] At this time, the optical sensing information can be subdivided into the magnetic pattern corresponding to the magnetic induction information, so that the amount of information per unit length or per unit area is greater than that when only the magnetic induction information is used.

[0434] In this case, in a walking information recognition device utilizing magnetic / optical patterns according to an embodiment of the present invention, the manner in which the magnetic induction information is used to generate the walking information may change based on the optical sensing information.

[0435] At this time, the walking information, in addition to the magnetic induction information and the optical sensing information, can be generated using the sensor information of the user terminal.

[0436] At this time, the user terminal sensor information can be used to correct at least one of the magnetic induction information and the optical sensing information.

[0437] At this time, the magnetic induction information can be used to control the optical sensor.

[0438] Therefore, embodiments of the present invention can be implemented as a computer-implemented method or as a non-transitory computer-readable medium recording computer-executable instructions. When the computer-readable instructions are executed by a processor, they can perform a method according to at least one aspect of the present invention.

[0439] As described above, the pedestrian information recognition method and apparatus of the present invention are not limited to the configuration and method of the embodiments described above. The embodiments can be configured by selectively combining all or part of each embodiment in order to achieve various modifications.

Claims

1. A walking information recognition method using a plurality of magnetic sensors, characterized by, include: Magnetic induction signals are generated from magnetic coatings applied to the ground. The magnetic induction signal is used to generate a frequency conversion signal; Pedestrian information is generated using the frequency-converted signal; The frequency conversion signal is generated by: detecting the magnetic induction signal at a preset period to generate a detection signal, dividing the detection signal equally according to a preset number to generate an average signal, and then performing frequency conversion on the average signal after collecting a preset conversion unit; The magnetic induction signal includes: A first magnetic signal is generated from the magnetic coating by a first magnetic sensor; as well as A second magnetic signal is generated from the magnetic coating by a second magnetic sensor; The frequency conversion signal is generated by using a noise-reduced signal generated from the difference between the first magnetic signal and the second magnetic signal; The noise-reduced signal is generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

2. The method of claim 1, wherein, Also includes: The direction information of the magnetic coating is generated by using the time difference between receiving the first magnetic signal and the second magnetic signal.

3. The method of claim 1, wherein, Also includes: Optical sensing signals are generated from the magnetic coating. Generating the walking information includes: Walking information is generated using at least one of the frequency conversion signal and the optical sensing signal.

4. The method according to claim 3, characterized in that, The magnetic induction signal corresponds to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

5. The method according to claim 3, characterized in that, 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 that when only the magnetic induction signal is used.

6. A pedestrian information recognition device utilizing multiple magnetic sensors, characterized in that, include: A magnetic sensor is used to generate a magnetic induction signal from magnetic coating applied to the ground. A frequency conversion unit is used to generate a frequency conversion signal using the magnetic induction signal; as well as The control unit is used to generate walking information using the frequency conversion signal; The frequency conversion signal is generated by: detecting the magnetic induction signal at a preset period to generate a detection signal, dividing the detection signal equally according to a preset number to generate an average signal, and then performing frequency conversion on the average signal after collecting a preset conversion unit; The magnetic induction signal includes: A first magnetic signal is generated from the magnetic coating by a first magnetic sensor; as well as A second magnetic signal is generated from the magnetic coating by a second magnetic sensor; The frequency conversion signal is generated by using a noise-reduced signal generated from the difference between the first magnetic signal and the second magnetic signal; The noise-reduced signal is generated by using the difference between the average signal corresponding to the first magnetic signal and the average signal corresponding to the second magnetic signal.

7. A walking information recognition method using a magnetic / optical pattern, characterized by, include: Magnetic induction information is generated from magnetic coating applied to the ground using a magnetic sensor. Optical sensing information is generated from the magnetic coating using an optical sensor; Walking information is generated using at least one of the magnetic induction information and the optical sensing information; as well as Provide user information corresponding to the walking information; The pattern of the magnetic coating applied to the ground is formed by 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, thereby embedding various information by combining magnetic and optical properties.

8. The method according to claim 7, characterized in that, The magnetic induction information corresponds to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.

9. The method according to claim 8, characterized in that, The optical sensing information subdivides the magnetic pattern corresponding to the magnetic induction information so that the amount of information per unit length or per unit area is greater than that when only the magnetic induction information is used.

10. The method according to claim 8, characterized in that, The way the magnetic induction information is used to generate the walking information changes based on the optical sensing information.

11. The method according to claim 8, characterized in that, The walking information is generated using user terminal sensor information in addition to the magnetic induction information and the optical sensing information.

12. The method according to claim 11, characterized in that, 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 according to claim 11, characterized in that, The magnetic induction information is used to control the optical sensor.

14. A pedestrian information recognition device utilizing magnetic / optical patterns, characterized in that, include, A magnetic sensor is used to generate magnetic induction information from magnetic coatings applied to the ground. An optical sensor is used to generate optical sensing information from the magnetic coating; as well as The control unit is configured to generate walking information using at least one of the magnetic induction information and the optical sensing information, and to provide user information corresponding to the walking information; The pattern of the magnetic coating applied to the ground is formed by 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, thereby embedding various information by combining magnetic and optical properties.

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