Читать книгу People Flow in Buildings - Marja-Liisa Siikonen - Страница 33
Example 2.1 Figure 2.6 shows the elevator load during an elevator stop. Let us assume car arrival load is 90 kg, minimum load is 10 kg, and departure load 75 kg. How many passenger transfers, P, during a stop are counted when using the three above mentioned, load‐based passenger counting methods.
ОглавлениеFirst method: P = (90–75)/75 = 0.2 ≈ 0 transfers
The first method divides the difference of arrival and departure load by the average passenger weight and suggests no passenger transfers.
Second method: P exit = (90–10)/75 = 1.07 ≈ 1 and P enter = (75–10)/75 = 0.87 ≈ 0
The second method calculates the difference of arrival and minimum load for exiting passengers, and the difference of departure and minimum load for entering passengers. This method suggests that one passenger has exited the car.
Third method: P exit = 2 and P enter = 3.
The third method counts all stepwise changes during a stop. The load has decreased two times and increased three times during the stop. This method suggests totally five passenger transfers during the elevator stop being the most accurate of the three methods.
