| 主权项 |
1. A control device for controlling the light intensity of at least one lighting device operationally coupled to the control device comprising:
an input arranged for receiving, from a light sensor operationally coupled to the input, light level measurements; and a controller arranged for determining, based on at least one light level measurement received via the input, whether the light sensor has been tampered with; and further arranged for controlling the at least one lighting device according to a fallback mode if it has been determined that the light sensor has been tampered with and controlling the at least one lighting device according to a daylight harvesting mode if it has been determined that the light sensor has not been tampered with; wherein the fallback mode comprises controlling the light intensity of the at least one lighting device based on a stored program accessible to the controller; and wherein the daylight harvesting mode comprises controlling the light intensity of the at least one lighting device based on the at least one light level measurement, wherein the controller is arranged for determining whether the light sensor has been tampered with based on comparing the at least one light level measurement to any of:
a light sensor dark current value,a second light level measurement, wherein the second light level measurement is received via the input after the at least one lighting device has been controlled to either increase or decrease the light intensity,a third light level measurement, wherein the third light level measurement is received via the input in a second time period, and wherein the at least one light level measurement is received via the input in a first time period, and wherein the end of the first time period and the start of the second time period are at least one minute apart. |
