User's Manual

V3d Product Specification, Version 2.06
3.0 Functional and Electrical Requirements
This section details the general functional and electrical requirements of the V3d, including the
higher-level application functions, sensor response and GPS.
3.1 Sensors
3.1.1 Optic Sensor
3.1.1.1 Performance
The sensor spectral response wavelength range shall be from 320 to 840 nm λ, with sensitivity
greater than 0.3 A/W across the range.
3.1.1.2 Function
The sensor output shall be sampled by / reported to the microprocessor at the configurable
sensor sampling rate of range from 1 to 60 seconds, even when the V3d is in its lowest power
state. The measured value is to be compared against a stored threshold, and when exceeded,
a logger record is to be immediately generated and sent to the IMB. The measured value is a
peak of the sensor output over the previous interval.
The sensor is re-armed after a the sensor level returns from the alarm state. At the point where
the sensor level crosses the threshold back to a typical level the sensor alarm is once again
active. Also, the sensor is disarmed or otherwise ignored while the illuminating indicator is
known to be activated.
3.1.1.3 Configuration
The threshold shall be user programmable, changeable over-the-air through either network or
locally. Also the threshold can be disabled, such that no event message is generated.
3.1.1.4 Mounting
The optic sensor is to be mounted interior to the enclosure, with exterior light presented to the
optic sensor through a simple light pipe or optical window, to preserve the enclosure
environmental seal.
3.1.2 Acoustic Sensor
3.1.2.1 Performance
The acoustic response frequency range shall be from 20Hz to 16kHz, with signal to noise ratio
greater than 40 dB across the range, with sensor values reported on a logarithmic scale.
3.1.2.2 Function
The sensor output shall be sampled by / reported to the microprocessor at the configurable
sensor sampling rate of range from 1 to 60 seconds, even when the V3d is in its lowest power
state. The measured value is to be compared against a stored threshold, and when exceeded,
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