主权项 |
1. A seatbelt buckle detection system for use with a controller and a power source coupled to the controller, the system comprising:
a seatbelt buckle housing for being mounted to a vehicle; a printed circuit board or other type of carrier fitted with one or more electrical conduits mounted within the buckle housing; a pair of leads extending along the printed circuit board for being operably coupled to a power source and a controller, the pair of leads defining part of a circuit; a first resistor of the circuit; a second resistor of the circuit; a switching device mounted to the circuit; a slider slidably engaged with the printed circuit board; a switching actuator mounted to the slider; a translatable ejector attached to the slider; a first current loop path completed with the ejector and switching actuator in a first position to actuate the switching device into a first configuration, the first current loop path including the first resistor and shunting the second resistor, the first current loop path providing a first measurable current output from the circuit; a second current loop path completed with the ejector and switching actuator in a second position to actuate the switching device into a second configuration, the second current loop path including the first resistor and the second resistor in series, the second current loop path providing a second measurable current output from the circuit that is lower than the first measurable current output; a third measurable current output defined by a fault in the system, the third measurable current output being different than both the first and second measurable current outputs to indicate the fault; and wherein the current output of the circuit is detectable by a controller to determine whether the ejector is in the first position, the ejector is in the second position, or the fault in the system is has occurred; wherein the first current loop path comprises the switching device in the first position connecting a pair of discrete contacts to shunt the second resistor; wherein the first current loop path and second current loop path are connected in parallel, and the resistance in the first current loop path is lower than the resistance in the second current loop path. |