Intelligent path identification module circuit design
A surface array CCD is used as the sensor of the path recognition module. The image sensor outputs a PAL analog video signal. Using the A/D converter inside the S12 microcontroller, and with the synchronization signal separated from the video signal, the image signal can be collected into the RAM of the microcontroller, and then the image signal is processed by the software algorithm to obtain the actual black line path. parameter.
Using the LM1881 video separation chip, the field and line synchronization signals can be separated from the analog video signal, and the two signals can be combined with the analog video signal and input into the single-chip microcomputer, so that the digital image information with correct timing can be collected.
The video signal separation circuit is as follows:
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