有人认为特斯拉把车主手里的edr数据拿到就可以让真相大白于天下，未免太天真的

Event Data Recorder
An Event Data Recorder is defined as a device or function in a vehicle that records the vehicle’s dynamic time-series data during the time
period just prior to a crash event (e.g., vehicle speed vs. time) or during a crash event (e.g., deltaV vs. time), intended for retrieval after
the crash event. For the purposes of this definition, the event data do not include audio and video data (49 CFR Part 563).
Data Synchronization
Pre-crash and crash data are recorded in discrete intervals and may be asynchronous.
Events
The Model 3 RCM can store up to two events: Event 1 and Event 2. The conditions for triggering the recording of an event differs
depending on event type.
Time Zero
Time Zero, as indicated throughout the event record, is the point where the restraint control algorithm is activated in any sensing
direction.
Recording duration
The end of an event is typically the moment at which the cumulative delta-V within a 20ms time period does not change by more than
0.8 km/h or the moment at which the crash detection algorithm of the RCM resets. Some events may lead to the recording of different
duration data as provided for by 49 CFR Part 563.
Deployment events
A deployment event may be recorded when the RCM commands the deployment of a device (e.g. airbag, pretensioner, or High Voltage
(HV) battery disconnect). Airbag deployment events are always locked in memory and are never overwritten. Pretensioner/HV disconnect
only deployments may not be locked and may be overwritten.
Non-deployment events
A non-deployment event may be recorded when the RCM senses a physical occurrence triggering the recording of an event but does not
command the deployment of a device (e.g. airbag, pretensioner, High Voltage (HV) battery disconnect). A non-deployment event is
recorded if one of the two event memory locations is available (not locked). Non-deployment events are not locked in memory. A nondeployment event is overwritten by another non-deployment event or a deployment event.
Data polarity
Where applicable, the data in this report follows the polarity conventions found in SAE J1733 and J211. For example, forward longitudinal
acceleration and resultant delta-V are positive and left-to-right lateral acceleration and resultant delta-V are positive. Positive roll angle is
rotation about the vehicle’s longitudinal axis using the right hand rule (clockwise vehicle roll when viewed from the rear of the vehicle).
Positive steering wheel angle is clockwise rotation of the steering wheel (steering to the right from straight).
Signal Not Available (SNA)
Signal Not Available (SNA) indicates a data element which is not available due to a fault or network communication disruption with the
sensor that supplies the data to the EDR.
Data Element Definitions
Vehicle Identification Number (VIN)
The Vehicle Identification Number (VIN) is stored in the RCM when it is installed at the Tesla Fremont Factory or by Tesla Service. The last
6 digits of the VIN can be anonymized by selecting the “Save without VIN sequence number” option in the Tesla EDR Retrieval Program.
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Retrieval Date
The Retrieval Date is the calendar date and time when the data was retrieved from the RCM. This date and time is sourced from the
computer that was used to retrieve the data. This is not the date and time of an event.
Retrieval User Comments
The Retrieval User Comments is an open field that can be used by the Tesla EDR Retrieval operator to record text comments at the time
of retrieval.
Retrieval Program Information
The Retrieval Program Information is the version number of the Tesla EDR Retrieval Program that was used to retrieve the EDR data from
the RCM.
EDR Report Information
The EDR Report Information identifies the version of the Tesla EDR Report Service.
Report Date
Report Date is the calendar date when the online Tesla EDR Report Service was used to generate the report. The source of this data
element is the Tesla server.
Number Of Events
The Number Of Events represents the total number of events that are stored in the RCM memory. The maximum number of events that
can be recorded is two.
Time From Event 1 to 2 (seconds)
The Time From Event 1 to 2 is the amount of time elapsed between the Time Zero of two linked events (if applicable). Linked events must
occur within 5 seconds and in the same ignition cycle. Non-linked events will report “N/A” in the Time From Event 1 to 2 value. The value is
reported to the nearest 0.5 seconds.
Ignition Cycle At Retrieval
The Ignition Cycle At Retrieval is the number of times that the RCM had been powered on as reported at the time that the Tesla EDR
Retrieval Program was used to retrieve the data from the RCM. The maximum value for ignition cycles is over 4 billion.
Maximum Delta-V, Longitudinal/Lateral (km/h)
The Maximum Delta-V, Longitudinal/Lateral is the maximum magnitude of the recorded delta-V during the event. The value is reported to
the nearest kilometer per hour. The range for Maximum Delta-V is -100 km/h to +100 km/h. The source of the data is the internal
calculation (integration) of the sensor data inside of the RCM.
Time to Maximum Delta-V, Longitudinal/Lateral (ms)
The Time to Maximum Delta-V, Longitudinal/Lateral is the time from Time Zero to the maximum magnitude of the recorded delta-V
during the event. The maximum value is 300 ms and the value is reported to the nearest millisecond.
Time to Maximum Delta-V, Resultant (ms)
The Time to Maximum Delta-V, Resultant is the time from Time Zero to the calculated maximum resultant of the longitudinal and lateral
delta-V components. The maximum value is 300 ms and the value is reported to the nearest millisecond.
Ignition Cycle At Event
The Ignition Cycle At Event is the number of times that the RCM had been powered on as reported at Time Zero. The maximum value for
ignition cycles is over 4 billion.
Ignition Cycle Runtime
Ignition Cycle Runtime is the total cumulated time from when the RCM was powered on to Time Zero for a given event. The maximum
value of Ignition Cycle Runtime is over 70 million minutes and the resolution is 0.1 minutes.
Odometer At Event Time Zero
Odometer At Event Time Zero is the value of the vehicle’s lifetime mileage accumulation at Time Zero. The maximum value for this data
element is over 1 million kilometers and the resolution is 0.1 kilometers.
Airbag Warning Lamp Status
Airbag Warning Lamp Status indicates the commanded state of the warning lamp as “on” or “off” within approximately the last second
before Time Zero.
ABS Warning Indicator Status
ABS Warning Indicator Status indicates the commanded state of the warning lamp as “on” or “off” within approximately the last second
before Time Zero.
Vehicle Drive Mode
Vehicle Drive Mode is the status of the vehicle’s powertrain setting within approximately the last second before Time Zero . Possible
values for this data element include Park, Reverse, Neutral and Drive.
Driver/Passenger Safety Belt Status
The Driver/Passenger Safety Belt Status is the recorded status of the safety belt at the time of the event. This data element is recorded
one second before Time Zero.
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Occupant Classification In Front Passenger Seat
The Occupant Classification data element indicates the detected occupant type in the front passenger seat. Values include: Empty, Child,
Small Adult, Large Adult.
Driver Seat Position
Driver Seat Position indicates the recorded seat track position of the driver seat. The possible values are Rearward and Forward.
Rear occupant seat status
The Model 3 may record data associated with the second row seat occupancy and seat belt status. The possible values for occupancy
status include: Not Occupied or Occupied, or Not Available. The possible values for rear occupant seat belt status are Buckled, Not
Buckled, or Not Available.
Driver Airbag Deployment 2nd Stage Disposal
This data element indicates if the driver airbag second stage was commanded to deploy (either for occupant restraint or propellant
disposal purposes).
Right Front Passenger Airbag Deployment 2nd Stage Disposal
This data element indicates if the passenger airbag second stage was commanded to deploy (either for occupant restraint or propellant
disposal purposes).
Complete File Recorded
Complete File Recorded indicates whether or not the complete data set available to the EDR was successfully recorded.
Deployment Summary
The Deployment Summary table indicates which of the deployable safety devices (if any) were commanded to deploy and at what time
(relative to the event Time Zero). The possible values for the status of each device is “Deployment Commanded” or “Deployment Not
Commanded”. The deployment commanded time is to the nearest millisecond.
Time Series Data
All time references are based on the event definition of Time Zero.
Vehicle Speed
Vehicle Speed is calculated using the four wheel speed signals as well as inertial acceleration measurements. This speed will be reported
either in kilometers per hour or miles per hour, depending on vehicle configuration. The minimum value for vehicle speed is 0 and the
maximum value is greater than 200 km/h (124 mph). The resolution of Vehicle Speed is to the nearest kilometer per hour or mile per hour,
depending on vehicle configuration.
Accelerator Pedal (%)
Accelerator Pedal (%) is the percent of full application of the accelerator pedal. The resolution of Accelerator Pedal (%) is to the nearest
percent.
Rear Motor Speed (rpm)
Rear Motor Speed is the rate of rotation of the rear drive motor. The maximum value for Rear Motor Speed is 17,900 rpm (revolutions per
minute). The resolution of Rear Motor Speed is to the nearest 1 rpm. Positive RPM values indicate that the vehicle motor is rotating
negatively about the vehicle’s lateral (y) axis, which provides forward motive force.
Service Brake
Service Brake indicates the status of the driver’s application of the brake pedal as reported by the brake booster. The possible values for
Service Brake are “On” (pedal being applied by driver) and “Off” (pedal not being applied by driver).
Stability Control
Stability Control is the status of the Electronic Stability Control system (ESC). The possible values are “On” (meaning the ESC was
enabled but not active), “Off” (meaning the ESC was turned off), and “Engaged” (meaning that the ESC was active).
ABS Activity
ABS Activity is the status of the Anti-lock Braking System (ABS). The possible values are “On” (meaning the ABS was active) and “Off”
(meaning the ABS was not active). Active ABS status does not necessarily indicate that the ABS control unit was actively modulating
braking at one or more wheels.
Steering Wheel Angle (deg)
Steering Wheel Angle represents the measured rotational angle of the steering wheel. The range of Steering Wheel Angle data is -819 deg
to +819 deg. The resolution of steering wheel angle is to the nearest degree. Data is recorded for 5 seconds prior to Time Zero every 0.1
seconds.
Lateral/Longitudinal Pre-Crash Acceleration
Lateral and Longitudinal Pre-Crash Acceleration data is the measured physical acceleration of the vehicle as measured at the RCM during
the 5 seconds prior to (and including) Time Zero.
Roll/Yaw Rate Pre-Crash Data
Roll and Yaw Rate Pre-Crash data is the measured angular velocity of the RCM for the 5 seconds prior to (and including) Time Zero. The
resolution of this data element is to the nearest 0.1 degrees/second and the samples are recorded every 0.1 seconds.
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Longitudinal/Lateral Delta-V data
Longitudinal and Lateral Time Series Delta-V Data indicates the change in velocity of the vehicle. The source of the data is the internal
calculation (integration) of the sensor data inside of the RCM. The resolution of Delta-V data is to the nearest kilometer per hour and the
data is reported every 10 ms after Time Zero (until the end of the event). The range for delta-V data is -100 km/h to +100 km/h.
Longitudinal/Lateral/Normal Time Series Acceleration data
Longitudinal and Lateral Time Series Acceleration Data indicates the measured physical acceleration of the vehicle. The source of the data
is the accelerometers located inside the RCM. The resolution of acceleration data is 0.8 g and the data is reported every 0.5 ms after Time
Zero (until the end of the event). The range of acceleration data is -96 g to +96 g.
Serial Numbers
Serial numbers are the sensor identification numbers that are stored in the RCM. These values are stored when the RCM is powered up
(each ignition cycle).
Hexadecimal Data
The Hexadecimal Data found in this report represents the original, raw data and identifying information retrieved from the RCM accessed
to ultimately generate this report. The binary data is represented in hexadecimal format as a matter of convenience. While it represents all
the raw data retrieved from the subject RCM not all of that raw data may be used in a given report or application