Patent ID: 8797162
Filing Date: 2014-08-05
Classification: B65D,G08B

Abstract:
1. A detection unit comprising: a magnet; a first magnetic switch predetermining a first magnetic threshold, the first magnetic switch outputting a first control signal if magnetic flux density of the magnet is greater than the first predetermined magnetic threshold, and outputting a second control signal according if the magnetic flux density of the magnet is less than the first predetermined magnetic threshold; a second magnetic switch predetermining a second magnetic threshold, the first magnetic switch outputting a third control signal if the magnetic flux density of the magnet is greater than the second predetermined magnetic threshold, and outputting a fourth control signal according if the magnetic flux density of the magnet is less than the second predetermined magnetic threshold, the first control signal being the same as the third control signal, the second control signal being the same as the fourth control signal; a processor electronically connected to the first magnetic switch and the second magnetic switch; and a clock electronically connected to the processor; in response to receiving the first control signal and the third control signal from the first magnetic switch or the second magnetic switch, the processor reads a first real-time clock (RTC) signal from the clock; and in response to receiving the first control signal and the third control signal from the first magnetic switch or the second magnetic switch, the processor reads a second RTC signal from the clock.