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2022-12-19T04:08:05Z
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A Simplified Telemetering System for Wire-use or Wireless Transmission
有線・無線回線のための簡易テレメータシステム
瀬戸, 憲彦
71958
中村, 正夫
71959
北浦, 泰子
71960
田上, 貴代子
71961
PCM(pulse coded modulation)
FM(frequency modulation)
S/N Improvement coefficient
In order to analyze a mechanism of earthquakes around Wakayama-city, we have had the earthquake observation plan using a wireless or wire type telemetering system in this area with For this purpose, we have developed a following telemetering system. This report describes a one-channel type FM-FM (wireless) and FM (wire) telemetering system. The system has the following characteristics : (1) This system has high S/N and high stability, comparing with a four-channel FM system, because it can use wider frequency deviation for sub-carrier. (2) The system is compact and low cost, and can be driven with a low input power. We produced 21 sets of wireless telemetering systems and five sets of wire-use ones. These telemetering systems are used mainly in the north-west of Kii peninsula and provide stable operation.
<論説>
departmental bulletin paper
東京大学地震研究所
1999
application/pdf
技術報告
5
16
22
AA1144042X
13426486
https://repository.dl.itc.u-tokyo.ac.jp/record/32253/files/05_016-022.pdf
jpn