Image Processing Reference
In-Depth Information
be effectively limited by that size. Low-power design will push the limits of the device's life length
basedontheresultingpowersource.
The resulting physical form can impose limitations and requirements on the design of the PCB and
positioning of electronics components, which could have performance and maintenance effects. For
example, the form factor could force the antenna to be mounted at a nonoptimal position (i.e., from
a radio communication point of view), which could cause degraded communications performance.
It is also possible that when selecting certain components, or a combination of components, the whole
PCB must be redesigned in order to it the components onto it in conjunction with having it it within
the device housing.
Wireless Vibration Monitoring Case Example
hephysicalformandshapeofthevibrationmonitoringdeviceisverymuchdictatedbythe
dimensions of the battery, which is selected based on the life length requirements on the device.
hisinturnrestrictstheshapeofthePCBandthustheareaavailableformountingelectrical
components. he result is a cramped area, which has forced a solution that uses both sides of the
PCB for component mounting (which has a slightly higher cost).
The weight of the device is also an important requirement. It should be as low as possible
because the device weight directly influences the quality of the vibration measurement (a heavy
deviceishardertomove,i.e.,vibrate).Arelatedrequirementisthesizeofthemountingareafor
thedevice;thisshouldbeassmallaspossiblewhilestillbelargeenoughtoprovidesolidmounting,
which also affects the quality of the vibration readings. Finally, a more esthetic requirement is that
thedeviceshouldhaveasimilarlookandfeelasaruggedindustrialaccelerometer.Figure.
shows the sensor prototype design.
 
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