Method and system for recording vehicle data relative to vehicle standard time
First Claim
Patent Images
1. A data recording system on a vehicle, the system comprising:
- a plurality of vehicle data measuring devices operable to measure vehicle performance data;
a master vehicle clock operable to maintain vehicle standard time for the vehicle, and operable to maintain driver local time;
a data logging device communicative with a plurality of the vehicle data measuring devices and the master vehicle clock, the data logging unit being operable to monitor the vehicle performance data and to record selected vehicle performance data along with a time stamp in vehicle standard time from the master vehicle clock;
an input control communicative with the master vehicle clock, the input control being operable to receive user input to decrement or increment the driver local time, and operable to communicate a change in driver local time to the master vehicle clock;
a local time display communicative with the master vehicle clock, the local time display being operable to display the driver local time.
3 Assignments
0 Petitions
Accused Products
Abstract
A master clock on a truck maintains vehicle standard time for the purposes of monitoring and recording vehicle performance data throughout the vehicle. Vehicle performance data is stored for a predefined period of time in response to detecting predefined events. Instances of vehicle performance data is time stamped with vehicle standard time. The master vehicle clock can also maintain the local time displayed to the driver. In response to inputs from the driver, the difference between driver local time and vehicle standard time is computed and the updated local time is displayed to the driver.
220 Citations
23 Claims
-
1. A data recording system on a vehicle, the system comprising:
-
a plurality of vehicle data measuring devices operable to measure vehicle performance data; a master vehicle clock operable to maintain vehicle standard time for the vehicle, and operable to maintain driver local time; a data logging device communicative with a plurality of the vehicle data measuring devices and the master vehicle clock, the data logging unit being operable to monitor the vehicle performance data and to record selected vehicle performance data along with a time stamp in vehicle standard time from the master vehicle clock; an input control communicative with the master vehicle clock, the input control being operable to receive user input to decrement or increment the driver local time, and operable to communicate a change in driver local time to the master vehicle clock; a local time display communicative with the master vehicle clock, the local time display being operable to display the driver local time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. In a vehicle including a data logging device for monitoring and recording events, a method for recording vehicle data relative to vehicle standard time and for maintaining driver local time for display in a cabin of the vehicle, the method comprising:
-
recording vehicle performance data relative to vehicle standard time by stamping slices of the vehicle performance data with the vehicle standard time from a master vehicle clock; storing a delta value representing a difference between the vehicle standard time and a driver local time; computing the driver local time from the delta value and the vehicle standard time; displaying the driver local time in the cabin of the vehicle; in response to a user request to decrement or increment the driver local time, updating the delta value to reflect the difference between the vehicle standard time and the driver local time; monitoring for a manually triggered event entered into an input device in the vehicle; in response to detecting the manually triggered event, storing the slices of vehicle performance data and time stamp over a predefined period that includes a time of occurrence of the manually triggered event. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A data recording system on a vehicle, the system comprising:
-
a data link; a plurality of electronic control units including sensors for measuring vehicle performance data, and operable to transmit vehicle performance data on the data link; the plurality of electronic control units including a data logging unit, and an instrument control unit; the data logging unit comprising a real time clock operable to maintain vehicle standard time, and memory operable to store a delta value representing a difference between the vehicle standard time and driver local time, the data logging unit being responsive to each of the plurality of electronic control units for receiving vehicle parameters from each of the electronic control units and storing selected vehicle parameters along with a time indicator in vehicle standard time indicating a time of occurrence of the corresponding parameter; and the instrument control unit comprising a display device, a keypad and a microprocessor, the display device being operable to display driver local time, the keypad operable to generate input signals representing an increment and a decrement in the driver local time and representing a manually triggered event, and the microprocessor being operable to receive the input signals and in response operable to communicate a change in driver local time and the manually triggered event to the data logging unit over the data link wherein the data logging unit is operable to store the selected vehicle parameters from the electronic control units over a period of time that includes a time of occurrence of the manually triggered event in response to the manually triggered event from the instrument control unit.
-
-
19. A master vehicle clock in a truck comprising:
-
a real time clock operable to maintain vehicle standard time for at least two electronic control units in the truck; a data logging device in communication with the electronic control units and the real time clock;
the data logging device being operable to buffer vehicle performance parameters from the electronic control units and the data logging device being operable to write a set of the buffered vehicle performance parameters along with a vehicle standard time indicator to a file in response to a user input event, where the set of buffered vehicle performance parameters is defined by a moving period of time that includes a time of the user input event,memory communicative with the real time clock, the memory operable to maintain a difference between the vehicle standard time and a driver local time; local time display device communicative with the real time clock, the local display device being operable to display the local driver time in a cabin of the truck; and an input control communicative with the real time clock, the input control being operable to receive input from a user representing a change in the driver local time, and operable to communicate the change to the real time clock.
-
-
20. A data recording system on a vehicle, the system comprising:
-
a plurality of vehicle data measuring devices operable to measure vehicle performance data from a plurality of vehicle subsystems; a master clock maintaining a common vehicle standard time for said plurality of vehicle data measuring devices and generating time signals corresponding to vehicle standard time; a data logging unit coupled to a plurality of the vehicle data measuring devices and to the master clock, the data logging unit recording the occurrence of predefined events detected by the data logging unit from data sent from the plurality of vehicle data measuring devices and detected from manually entered input during operation of the vehicle, the data logging unit also recording time stamps in association with the recorded events and a set of vehicle parameters sent from the vehicle data measuring devices within a predefined period of the occurrence of the recorded events, the time stamps being responsive to time signals from the master clock, whereby the time of an event relative to vehicle standard time is recorded for use in evaluating the event or diagnosing the cause of the event. - View Dependent Claims (21, 22, 23)
-
Specification