| 摘要 |
<p>The method involves carrying out voltage measurement of photo transistors (132, 142, 152) placed opposite to a red lamp (4), an orange lamp (5) and a green lamp (6) at a specific instant, and carrying out another voltage measurement of the photo transistor after a predefined delay. The two voltage measurements of the photo transistors are compared. An operating state of the lamp opposite to the photo transistors is deduced. A standard deviation of absolute value between the voltage measurements is compared with a predefined threshold. An independent claim is also included for a device for detecting a signaling state of lighting signals comprising a sensor.</p> |
