| 摘要 |
<p>The device for demonstrating the movement in time features two sets (2, 3) of equidistant optical resistors or LEDs in two parallel lines. The tracks (12) provided for the movement of the body (1) are located parallel to the sets (2, 3). The body (1) features a laser device (11) which in each moment illuminates two adjacent light sensitive elements of set 2. Each optical resistor (2i) is in line of the corresponding elements connected to the first logical AND-input, while on the other input to this door a time pulse signal is supplied and whose exit is via a logical flip-flop element connected to the LED (3i). The outstanding feature of the device according to the invention for demonstrating the movement in time is, that it provides a visual presentation of path sections which the body passes in equal time periods thus allowing to view whether the movement in certain moments is uniform or accelerated.</p> |
