Photodetector development for the Wheel Abrasion Experiment on the Sojourner microrover of the Mars Pathfinder mission

IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203) Pub Date : 1997-10-01 DOI:10.1109/IECEC.1997.659283

D. Wilt, P. P. Jenkins, D. Scheiman

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引用次数: 4

Abstract

On-board the Mars Pathfinder spacecraft, launched in December of 1996, is a small roving vehicle named Sojourner. On Sojourner is an experiment to determine the abrasive characteristics of the Martian surface, called the Wheel Abrasion Experiment (WAE). The experiment works as follows: one of the wheels of the rover has a strip of black anodized aluminum bonded to the tread. The aluminum strip has thin coatings of aluminum, nickel and platinum deposited in patches. There are five patches or samples of each metal, and the patches range in thickness from 200 /spl Aring/ to 1000 /spl Aring/. The different metals were chosen for their differing hardness and their environmental stability. As the wheel is spun in the Martian soil, the thin patches of metal are abraded away, exposing the black anodization. The abrasion is monitored by measuring the amount of light reflected off of the samples. A photodetector was developed for this purpose, and that is the subject of this paper.

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火星探路者任务中旅居者微型飞行器车轮磨损实验的光电探测器研制

1996年12月发射的火星探路者号航天器上有一个名为“旅人”的小型漫游车。“旅居者”号上有一项测定火星表面磨蚀特性的实验，称为“车轮磨蚀实验”(WAE)。实验是这样进行的:探测车的一个轮子上有一条黑色阳极氧化铝条粘在胎面上。铝带上有一层薄薄的铝、镍和铂镀层。每种金属有五个贴片或样品，贴片的厚度从200 /spl Aring/到1000 /spl Aring/不等。选择不同的金属是因为它们有不同的硬度和环境稳定性。当车轮在火星土壤中旋转时，薄薄的金属片被磨损掉，露出黑色的阳极氧化。磨损是通过测量样品反射的光量来监测的。为此研制了一种光电探测器，这就是本文的主题。

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IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203)

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