ION Technical Content
Low Cost Dead Reckoning Sensors
| Abstract: | The objective of the work reported in this paper was to develop low cost sensors for consumer automobile navigation. This paper describes the electronic and the mechanical design of the sensors. Some aspects of the designs are covered by three Etak patents. A fluxgate compass,an inclinometer,and a two axes rate gyro were developed with an objective to reduce manufacturing cost enabling their use in a low cost consumer product. Very practical sensors having low cost were successfully developed. The fluxgate compass is compact, low powered, and requires no adjustment during manufacturing. A two axes inclinometer and a two axes rate gyro sharing the capabilities of a combined analog/digital CMOS ASIC provide performance equal to other available sensors of similar performance at a fraction of the cost. The ASIC provides the gym output in digital form eliminating the customary requirment for a high resolution A/D converter. Low power and ruggedness are also features of the gyro. A high performance vehicle navigation system using dead-reckoning and map-matching can be made with sensors costing less than $50. This dead-reckoning capability is also a cost effective addition to systems using GPS to fill in for times when GPS is inaccurate due to signal disturbances caused by shielding of sat&es by buildings, trees, etc. |
| Published in: |
Proceedings of the 1993 National Technical Meeting of The Institute of Navigation January 20 - 22, 1993 Parc 55 Hotel San Francisco, CA |
| Pages: | 145 - 149 |
| Cite this article: | Phillips, Alan C., "Low Cost Dead Reckoning Sensors," Proceedings of the 1993 National Technical Meeting of The Institute of Navigation, San Francisco, CA, January 1993, pp. 145-149. |
| Full Paper: |
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