Analysis and Measurement of Reflectance of Moist Sand Surface Using a Four Transmitter Array

Autor:	Seiichi Motooka, Liang Tao, Nobuyuki Takano, Masao Fujimoto
Rok vydání:	1999
Předmět:	Work (thermodynamics) Data processing Materials science Moisture Transmitter General Engineering General Physics and Astronomy Ultrasonic sensor Water content Stability (probability) Remote sensing Power (physics)
Zdroj:	Japanese Journal of Applied Physics. 38:3157
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.38.3157
Popis:	A one-transmitter eight-receiver (1T8R) array pattern was employed in our previous work to measure the moisture content of sand by neural-network data processing of ultrasonic pulse-echo signals. In order to enhance the power of the incident wave to improve the stability of measurement of sand moisture, this paper proposes a four-transmitter five-receiver (4T5R) array pattern. The results of theoretical estimation and experimental measurement show a similar tendency, that the reflectance of 4T5R is markedly larger than that of 1T8R. Thus it is verified that the new transmitter-receiver arrangement improves the measuring stability.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8111015b91a9bfdb3ff766064265b839 https://doi.org/10.1143/jjap.38.3157 Zobrazit plný text záznamu