Patent ID: 9159208
Filing Date: 2015-10-13
Classification: G08B,H05B,Y02B

Abstract:
1. A system for detecting an object in a predefined space, comprising: a first sensor configured to detect the object in the predefined space; and a second sensor configured to detect the object in the predefined space, wherein the second sensor is deactivated until the first sensor has detected the object in the predefined space, wherein a deactivated second sensor consumes less energy than an activated second sensor; a third sensor configured to detect the object in the predefined space, wherein the third sensor is deactivated until the second sensor has detected the object in the predefined space, wherein a deactivated third sensor consumes less energy than an activated third sensor; a control unit configured to: (i) activate the second sensor in response to the first sensor detecting the object, (ii) deactivate the first sensor in response to the activation of the second sensor, (iii) activate the third sensor in response to the second sensor detecting the object, (iv) deactivate the second sensor in response to the activation of the third sensor, and (v) intermittently activate for a predetermined amount of time at least one of the second and third sensors, even if the first sensor has not detected the object in the predefined space; and wherein the first, second, and third sensors are ordered according to their respective consumption of energy such that the first sensor consumes the least amount of energy when activated, and the third sensor consumes the greatest amount of energy when activated.