Method and apparatus for recognizing driving information by using plurality of magnetic sensors
Disclosed herein are a method and apparatus for recognizing driving information using multiple sensors. The method for recognizing driving information according to an embodiment of the present disclosure includes generating a magnetic sensing signal from magnetic paint applied to road markings, generating a frequency-converted signal using the magnetic sensing signal, and generating driving information for a vehicle using the frequency-converted signal.
1. A method for recognizing driving information, comprising:
generating a magnetic sensing signal from magnetic paint applied to road markings;
generating a frequency-converted signal using the magnetic sensing signal;
generating driving information for a vehicle using the frequency-converted signal; and
detecting a vibration frequency by a vibration sensor installed in the vehicle while the magnetic sensing signal is being generated
wherein the magnetic sensing signal includes a first magnetic sub-signal generated from the magnetic paint through a first magnetic sensor and a second magnetic sub-signal generated from the magnetic paint through a second magnetic sensor,
wherein the frequency-converted signal is generated using an additional noise-reduced signal acquired by further removing noise corresponding to the vibration frequency from the noise-reduced signal generated using a difference between the first magnetic sub-signal and the second magnetic sub-signal.
2. The method of claim 1 , wherein the frequency-converted signal is generated by generating detection signals by detecting the magnetic sensing signal at preset periods, generating average signals by averaging a preset number of detection signals, collecting the average signals for a preset time period, and performing frequency conversion thereon.
3. The method of claim 2 , wherein the noise-reduced signal is generated using differences between the average signals corresponding to the first magnetic sub-signal and the average signals corresponding to the second magnetic sub-signal.
4. The method of claim 2 , further comprising:
generating direction information of the magnetic paint using a difference between a time at which the first magnetic sub-signal is received and a time at which the second magnetic sub-signal is received.
5. The method of claim 1 , further comprising:
generating an optical sensing signal from the magnetic paint,
wherein generating the driving information comprises generating the driving information using any one or more of the frequency-converted signal, or the optical sensing signal, or a combination thereof.
6. The method of claim 5 , wherein the magnetic sensing signal corresponds to a one-dimensional magnetic pattern or a two-dimensional magnetic pattern.
7. The method of claim 5 , wherein the optical sensing signal is configured to subdivide a magnetic pattern corresponding to the magnetic sensing signal, thereby increasing an amount of information per unit length or unit area, compared to when only the magnetic sensing signal is used.
8. An apparatus for recognizing driving information, comprising:
a magnetic sensor for generating a magnetic sensing signal from magnetic paint applied to road markings;
a processor configured to:
generate a frequency-converted signal using the magnetic sensing signal;
generate driving information for a vehicle using the frequency-converted signal; and
a vibration sensor for detecting a vibration frequency while the magnetic sensing signal is being generated,
wherein the magnetic sensing signal includes a first magnetic sub-signal generated from the magnetic paint through a first magnetic sensor and a second magnetic sub-signal generated from the magnetic paint through a second magnetic sensor,
wherein the frequency-converted signal is generated using an additional noise-reduced signal acquired by further removing noise corresponding to the vibration frequency from the noise-reduced signal generated using a difference between the first magnetic sub-signal and the second magnetic sub-signal.
9. The apparatus of claim 8 , wherein the frequency-converted signal is generated by generating detection signals by detecting the magnetic sensing signal at preset periods, generating average signals by averaging a preset number of detection signals, collecting the average signals for a preset time period, and performing frequency conversion thereon.
10. The apparatus of claim 9 , wherein the noise-reduced signal is generated using differences between the average signals corresponding to the first magnetic sub-signal and the average signals corresponding to the second magnetic sub-signal.
11. The apparatus of claim 9 , wherein the control unit generates direction information of the magnetic paint using a difference between a time at which the first magnetic sub-signal is received and a time at which the second magnetic sub-signal is received.
12. The apparatus of claim 8 , further comprising:
an optical sensor for generating an optical sensing signal from the magnetic paint,
wherein the processor generates the driving information using any one or more of the frequency-converted signal, or the optical sensing signal, or a combination thereof.