Trimble Inc. TRIMTRAC1 Benutzerhandbuch
DRAFT TrimTrac Locator Technical Manual 25
The TrimTrac locator will transition from the IDLE state to either the FIX or
STATUS states as follows:
STATUS states as follows:
1. To the FIX state if:
a. Motion is detected during the IDLE state for more than T7 seconds
(“Motion Timeout”) AND the Motion Report Flag is set to FALSE
(“0”); OR
(“0”); OR
b. Motion has been detected between the time the motion detector
latch was last reset and before the device entered the current IDLE
state, regardless how the Motion Report Flag is set.
state, regardless how the Motion Report Flag is set.
2. To the STATUS state if:
a. The Motion Report Flag is set to TRUE (“1”) AND motion is
detected during the IDLE state for more than T7 seconds;
provided, however, that no motion has been detected between the
time the motion detector latch was last reset and before the device
entered the current IDLE state; OR
provided, however, that no motion has been detected between the
time the motion detector latch was last reset and before the device
entered the current IDLE state; OR
b. The RTC Wakeup countdown timer, T1, has expired.
A fundamental operational premise of the TrimTrac locator is to compute and
send position reports only if the device has moved. To repeatedly report position
even though there has been no motion would needlessly reduce battery-life while
increasing communication costs.
send position reports only if the device has moved. To repeatedly report position
even though there has been no motion would needlessly reduce battery-life while
increasing communication costs.
The purpose of the Motion Timeout, T7, is to minimize false detections of motion
while the TrimTrac locator is stationary. Typical Motion Timeouts are in the
range of 15 to 20 seconds.
while the TrimTrac locator is stationary. Typical Motion Timeouts are in the
range of 15 to 20 seconds.
Certain applications may benefit from knowing as soon as possible when motion
first occurs rather that waiting for a position fix to be calculated first. The
purpose of the Motion Report Flag is to cause a Motion Report to be generated
and sent as soon as possible upon detection of motion and then computing a new
position fix.
first occurs rather that waiting for a position fix to be calculated first. The
purpose of the Motion Report Flag is to cause a Motion Report to be generated
and sent as soon as possible upon detection of motion and then computing a new
position fix.
If the unit is at rest, but there has been motion since the last time the motion
detector latch had been reset, the unit will attempt one final position fix once the
DELAY state timer, T4, has expired. In so doing, the unit will report its current
at-rest position if a successful fix has been achieved. Whether or not the unit was
successful in obtaining this fix, no further position fixes will be attempted until
subsequent motion is detected.
detector latch had been reset, the unit will attempt one final position fix once the
DELAY state timer, T4, has expired. In so doing, the unit will report its current
at-rest position if a successful fix has been achieved. Whether or not the unit was
successful in obtaining this fix, no further position fixes will be attempted until
subsequent motion is detected.
The purpose of the RTC Wakeup countdown timer, T1, is to periodically report
into the server application during extended stationary periods. In so doing, the
health and status of the TrimTrac locator is verified and queued SMS messages
can be delivered to the TrimTrac locator. The server may at this time request
status and logged data from the TrimTrac locator or change its configuration
into the server application during extended stationary periods. In so doing, the
health and status of the TrimTrac locator is verified and queued SMS messages
can be delivered to the TrimTrac locator. The server may at this time request
status and logged data from the TrimTrac locator or change its configuration