NDLI: A simple low-cost, thermistor-based, local air-velocity mapping method (PCB modules)

Content Provider	IEEE Xplore Digital Library
Author	Alba, J. Bolton, S.
Copyright Year	1988
Description	Author affiliation: GenRad Inc., Concord, MA, USA (Alba, J.; Bolton, S.)
Abstract	A method is presented for using interchangeable thermistors as local air-velocity transducers for the thermal verification of electronic assemblies. Because of their small size, thermistors are ideally suited for local velocity measurements in hard-to-reach places, and do not interfere with the phenomena being measured. Accuracy is acceptable in the velocity range from 0 to 600 ft/min, in the ambient temperature range from 20 to 45 degrees C, and the cost is lower than that of other sensors. Because the thermistor is intrinsically a temperature sensor, it can also double as a local air-temperature transducer. Thermistor signals are high level, and therefore easier to read than those from other types of transducers such as thermocouples or transistor junctions, and no reference temperatures or precalibration are required. Used in conjunction with data logging equipment and a computer, a printed-circuit module is produced, displayed, and stored. These data are intended for use with proprietary software to predict individual board component junction temperatures and failure rate.<>
Starting Page	385
Ending Page	389
File Size	307235
Page Count	5
File Format	PDF
DOI	10.1109/ECC.1988.12621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermistors Temperature sensors Transducers Velocity measurement Assembly Size measurement Temperature distribution Costs Sensor phenomena and characterization Computer displays
Content Type	Text
Resource Type	Article

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