Speed-Measuring Device Performance Specifications: Lidar Module

Speed-Measuring Device Performance Specifications: Lidar Module
1.4.21 Operational Test - a test involving realistic conditions of operation. For instance,
a lidar unit receiving its power from a stationary patrol vehicle and used to measure the
speed of another vehicle traveling at a known speed.
1.4.22 Range - the distance from the reference plane of the lidar unit to the point where
the transmitted beam strikes the target, for which valid distance measurements can be
acquired.
1.4.23 Recorded Images - images recorded on photographs, microphotographs,
electronic images, videotape, or any other medium.
1.4.24 Remote Control - a means by which many functions of the lidar unit can be
controlled through a computer or a separate control panel.
1.4.25 Remote Trigger - a means by which the lidar unit can be triggered remotely. It is
envisioned (though not required) that a remote control would involve a two-way
computer data link, while a remote trigger can be as simple as a pair of wires leading
from a switch to the lidar unit.
1.4.26 RS-232 - an Electronics Industries Association (EIA) standard for serial digital
communications. Historically, this standard was put into wide use before the details
were well-defined, and it was often a challenge to interconnect two devices claiming to
meet RS-232 specifications. In the 1980s, following the adoption of standard RS-232
by EIA, implementation became more consistent.
1.4.27 Serial Port - a module within a computer or a computerized instrument which
permits communication over a cable. The individual bits of a data byte are sent or
received one after the other, or "serially."
1.4.28 Target Discrimination - the ability of a speed-measuring device to differentiate
between target vehicles.
1.4.29 Target Speed - the speed of the target vehicle along its path, with respect to the
ground.
1.4.30 Target Speed Simulator - a laboratory device capable of receiving light pulses
from a lidar unit and then sending return pulses with changing delays. The changing
delays simulate a target vehicle moving at a specified speed and direction, and at a
particular range.
1.4.31 Target Vehicle - the vehicle at which the lidar unit is aimed using the unit’s visual
sighting device.
1.4.32 Unattended Operation - an operator is not an integral part of the evidence
acquisition process.
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