سلام
تو قوانین مسابقات soccerB مشخصات توپ رو اینطور نوشته:
2.1 IR light
The ball emits infra-red (IR) light of wavelengths in the range 920nm - 960nm, pulsed at a square-wave carrier frequency of 40kHz. The ball should have enough ultra bright, wide angle LEDs to minimize unevenness of the IR output.
2.4 Modulation
The 40kHz carrier output of the ball shall be modulated with a trapezoidal (stepped) waveform of frequency 1.2kHz. Each 833-microsecond cycle of the modulation waveform shall comprise 8 carrier pulses at full intensity, followed (in turn) by 4 carrier pulses at 1/4 of full intensity, four pulses at 1/16 of full intensity and four pulses at 1/64 of full intensity, followed by a space (i.e. zero intensity) of about 346 microseconds. The peak current level in the LEDs shall be within the range 45-55mA. The radiant intensity shall be more than 20mW/sr per LED.
Specifications
IR-signal mode
A: Pulse modulated RoboCupJunior Soccer Ball Standard (step waveform modulation, 40kHz carrier)
B: Unmodulated RoboCupJunior Soccer Ball Standard (steady IR emission)
C: 600Hz pulse modulation (40kHz carrier)
D: 1200Hz pulse modulation (40kHz carrier
پس میتوان نتیجه گرفت که توپ مسابقات روی مد D قرار داره
برای تشخیص این موج شما نیاز به مدار واسط دارید و نمیتونید مستقیما خروجی سنسور را به میکرو وصل کنید.
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