Читать книгу People Flow in Buildings - Marja-Liisa Siikonen - Страница 38

The number of passengers using escalators was measured using two stereo cameras that were installed in the same plane as the inclined floor of the escalator (Uimonen, 2015). The sensors were placed directly over the entrance of the ascending escalator. People flow counting was made with the help of projection lines, see Figure 3.8 (Uimonen et al. 2016). Accurate time stamps were used to estimate passenger batch sizes. People were assumed to arrive in a batch if they entered the escalator within a three‐second period. Some error in counting was caused by people moving in the groups, or when a tall person was hiding a smaller one.

Figure 3.8 Setup of people flow counting in escalators

(Source: Uimonen et al. 2016. © Elsevier).