Systems and methods for event detection and logging in access control points
AssigneeSigcom, Inc.
InventorsFrank Muraski, Adam Irving
Life of this patent
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Abstract
Systems and methods for event detection and logging in access control points are described. One described method includes detecting an event; transmitting a timing correction request over a communications link; receiving a first timing signal having a first send time; and transmitting a second timing signal. The timing signal has a second send time, a first receive time associated with the first send time, and the first send time. The method further includes receiving a timing correction based at least in part on a reference time and a latency of the communications link; determining a corrected timestamp using the timing correction; and recording the event and the corrected timestamp.
Claims14
A method for event recording comprising:
- detecting an event;
- transmitting a timing correction request over a communications link;
- receiving a first timing signal having a first send time;
- transmitting a second timing signal having a second send time, a first receive time associated with the first send time, and the first send time;
- receiving a timing correction based at least in part on a reference time and a latency of the communications link;
- determining a corrected timestamp using the timing correction;
- and
- recording the event and the corrected timestamp.
A method for event recording comprising:
- detecting an event;
- updating a state table based at least in part on the event;
- associating a timestamp with the receipt of the event signal;
- receiving a request for the state table;
- transmitting the state table and the timestamp
A system for event recording comprising:
- a first processor configured to:
- receive an event signal comprising an event identifier,
- receive a timing signal from a reference time processor, and
- store the event identifier and a timestamp in a state table;
- a second processor in communication with the first processor the second processor configured to:
- request at least a portion of the state table comprising an event identifier and a timestamp from the first processor,
- receive the at least a portion of the state table from the first processor, and to store the at least a portion of the state table.
A method for logging output signals in a human-machine interface comprising:
- receiving an output signal from a human-machine interface;
- recording the output signal with a timestamp;
- and
- transmitting the output signal over a communications link.
A system for logging output signals in a human-machine interface comprising:
- a human-machine interface;
- and
- a processor in communication with the human-machine interface, the processor configured to:
- receive an output signal from the human-machine interface,
- receive timing information from a reference time processor,
- store the output signal and a timestamp, and
- transmit the output signal over a communications link.
A computer-readable medium on which is encoded program code for event recording, the program code comprising:
- program code for detecting an event;
- program code for transmitting a timing correction request over a communications link;
- program code for receiving a first timing signal having a first send time;
- program code for transmitting a second timing signal having a second send time, a first receive time associated with the first send time, and the first send time;
- program code for receiving a timing correction based at least in part on a reference time and a latency of the communications link;
- program code for determining a corrected timestamp using the timing correction;
- and
- program code for recording the event and the corrected timestamp.
A computer-readable medium on which is encoded program code for logging output signals in a human-machine interface, the program code comprising:
- program code for receiving an output signal from a human-machine interface;
- program code for recording the output signal with a timestamp;
- and
- program code for transmitting the output signal over a communications link.
Dependencies are inferred from the claim text.