In this paper we developed an automatic sampling device which is capable of taking samples of the substrates at pre-programmed schedule and storing the samples for retrieval. For the reason that the sampler is operated in a severe ocean environment, the first design consideration is to use mechanisms and parts as simple as possible to reduce the risk of failure. Another primary concern is to make sure the design can preserve sediment securely in water. Besides, other considerations include size, weight, and functions of programmable sequential sampling. The sampling device is developed in two phases. Firstly, a device equipped with only one sampler is designed for achieving the purpose of programmable sampling. Secondly, the design will be extended to have multiple samplers to accomplish the task of sequential sampling. Six main designs are implemented in the first stage. They are the conceptual design of the grab for taking and storing sediment, the design of separation and reunion between grab and transmission mechanism, gearing design for transmitting motion of the sampler, timer and control circuit design for the lowest power consuming consideration, pressure hull design for installing a motor, batteries, and needed electric devices, and frame design for firmly supporting all instruments. The design of phase one was completed and its preliminary testing result came out successfully except that the collection chamber is not sealed securely enough. A new sample holder was designed and then successfully solved the problem of sediment sealing. According to the design of phase one, the concept design of the sequential sampling device of having 24 sample holders is presented.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0730104-102057 |
| Date | 30 July 2004 |
| Creators | Tsai, Yi-Cheng |
| Contributors | Hsin-Hung Chen, Chau-Chang Wang, Tsu-Chin Liu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730104-102057 |
| Rights | unrestricted, Copyright information available at source archive |
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