Campus Units

Agricultural and Biosystems Engineering

Document Type

Conference Proceeding


Livestock Environment VII

Publication Date


Journal or Book Title

Livestock Environment VII, Proceedings of the Seventh International Symposium, 18-20 May 2005 (Beijing, China)

Conference Title

Livestock Environment VII

Conference Date

May 18–20, 2005


Beijing, China


The objective of this study was to develop a low-cost, automatic and continuous Herd Activity and Welfare Kit (HAWK). The operational goal for the GPS HAWK was to collect GPS positions and analog sensor data at a user-specified sampling frequency and store it in a secure format. The GPS HAWK uses a Garmin 12-channel, WAAS corrected, low-power GPS receiver with(0-5V single-ended, 10-bit resolution) analog to digital (A/D) conversion channels as well as 16 general purpose I/O pins that can be configured for digital operations or serial communication. Data is stored to an EEPROM device and offloaded daily to a 32MB Compact Flash memory card. Power is supplied using a 6VDC, 7.2Ah sealed lead acid battery. The GPS HAWK was enclosed in a weatherproof enclosure and mounted above the shoulders to provide better satellite visibility to the receiver and to prevent contact with concrete feed bunks in confined animal feeding studies.


This proceeding is from Proceedings of the Seventh International Symposium, 18-20 May 2005 (Beijing, China) Publication Date 18 May 2005. Paper No. 701P0205.

Copyright Owner

American Society of Agricultural Engineers



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