System for detecting the integrity of a lighting circuit
First Claim
1. A status monitoring circuit for monitoring the status of an external device coupled to an electrical system of a vehicle, the status monitoring circuit comprising:
- a sensing unit coupled to the external device and configured to sense an input voltage and an input current at the external device;
a monitoring unit coupled to the sensing unit and configured to determine whether the external device is operational based on the sensed input voltage, and, in response, to detect an undercurrent condition of the external device based on the sensed input current, the monitoring unit being further configured to disregard the sensed input current when the external device is not operational; and
a status indicator coupled to the monitoring unit and configured to display a fault indication in response to the monitoring unit detecting the undercurrent condition.
1 Assignment
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Accused Products
Abstract
A status monitoring circuit for monitoring the status of an external device coupled to an electrical system of a vehicle, the status monitoring device including a sensing unit coupled to the external device and configured to sense an input voltage and an input current at the external device, a monitoring unit coupled to the sensing unit and configured to determine a normal operation of the external device based on the sensed input voltage, and, in response, to detect an undercurrent condition of the external device based on the sensed input current, and a status indicator coupled to the monitoring unit and configured to display a fault indication in response to the monitoring unit detecting the undercurrent condition.
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Citations
20 Claims
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1. A status monitoring circuit for monitoring the status of an external device coupled to an electrical system of a vehicle, the status monitoring circuit comprising:
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a sensing unit coupled to the external device and configured to sense an input voltage and an input current at the external device; a monitoring unit coupled to the sensing unit and configured to determine whether the external device is operational based on the sensed input voltage, and, in response, to detect an undercurrent condition of the external device based on the sensed input current, the monitoring unit being further configured to disregard the sensed input current when the external device is not operational; and a status indicator coupled to the monitoring unit and configured to display a fault indication in response to the monitoring unit detecting the undercurrent condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A status monitoring connector configured to be coupled to an electrical system of a tractor and an electrical system of trailer comprising an external device, the status monitoring connector comprising:
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a sensing unit coupled to the external device and configured to sense an input voltage and an input current at the external device; a monitoring unit coupled to the sensing unit and configured to determine a normal operation of the external device based on the sensed voltage, and, in response, to detect an undercurrent condition of the external device based on the sensed input current; a status indicator coupled to the monitoring unit and configured to display a fault indication in response to the monitoring unit detecting the undercurrent condition; a housing configured to accommodate the sensing unit and the monitoring unit; a first end coupled to the housing and configured to couple to the electrical system of the tractor; and a second end coupled to the housing and configured to couple to the electrical system of the trailer. - View Dependent Claims (18, 19, 20)
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Specification