Patent ID: 9128155
Filing Date: 2015-09-08
Classification: B66B,G01R

Abstract:
1. A switch detection system comprising: a first switch having a pole node, a normally closed contact, and a normally open contact, the pole node of the first switch connected to a voltage source node; a second switch having a pole node, a normally closed contact and a normally open contact, the pole node of the second switch connected to the normally closed contact of the first switch; a voltage detector connected to the normally closed contact of the second switch; a first resistor connected to the normally open contact of the first switch; a second resistor connected to the normally open contact of the first switch and the normally open contact of the second switch; and a processor having a first connection connected to the pole node of the first switch and a second connection connected to the first resistor; wherein the processor is configured to: determine a voltage across the first connection of the processor and the second connection of the processor; determine a voltage drop across the connections of the processor; and calculate a number of resistors in series between the first connection of the processor and the second connection of the processor.