A TTL-controlled trigger generator with rise-time of nanosecond level

Pavement Damage Crack Recognition Method Based on High-Resolution Linear Array Cameras and Adaptive Lifting Algorithm

“…During the driving process of the vehicle, the photoelectric encoder rotates synchronously with the wheel to generate TTL(Transistor-Transistor Logic) pulse signals, which are processed by the data acquisition card and part of peripheral circuits [27][28][29]. The computer counts the pulses and converts them into mileage and speed information in real time.…”