How pulse width is calibrated to measure distance

[ShanLan12]

Hello, I have a question for you, I recently came across a piece of code in my project which uses the MS1005 chip using the stop1 channel and stop2 channel connected to the same pin. A rising edge trigger and a falling edge trigger can be used to get the pulse width and use this pulse width to calibrate the distance measured. May I ask why it does this and how it calibrates the distance

Here is the schematic for this project
XU_MAIN_v13.pdf
Thank you!

[iliasam]

Firstly, have you read this - https://github.com/iliasam/OpenTOFLidar/wiki/TDC-data-processing ?
You have connected "STOP1" and "STOP2" lines, so you need to change TDC configuration (comparing with my code).

[ShanLan12]

Thank you for your answer.
I still don't know what the pulse width has to do with the measured distance, and why you can use the pulse width to correct the measured distance.

[iliasam]

Try to read this: https://github.com/iliasam/OpenTOFLidar/wiki/Walk-error-calibration and the original article: https://habr.com/ru/articles/485574/

[ShanLan12]

Thanks!