TRANSMISSION LINE LENGTH DETECTION DEVICE AND NETWORK COMMUNICATION DEVICE

A transmission line length detection device (3) is configured in such a way as to include: a first capacitance calculation unit (21) to observe a voltage change in a transmission line (2) in a communication network, and to calculate the total capacitance which is the capacitance of the whole of the...

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Bibliographische Detailangaben
Hauptverfasser:	ITAKURA, Hiroshi, AKEBOSHI, Yoshihiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MEASURING MEASURING ANGLES MEASURING AREAS MEASURING ELECTRIC VARIABLES MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING MAGNETIC VARIABLES PHYSICS TESTING TRANSMISSION
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Beschreibung
Zusammenfassung:	A transmission line length detection device (3) is configured in such a way as to include: a first capacitance calculation unit (21) to observe a voltage change in a transmission line (2) in a communication network, and to calculate the total capacitance which is the capacitance of the whole of the transmission line (2) on the basis of the voltage change; a second capacitance calculation unit (22) to measure the characteristic impedance of the transmission line (1) and to calculate the capacitance per unit length of the transmission line (2) from the characteristic impedance; and an electric length calculation unit (23) to calculate the electric length of the transmission line (2) by dividing the total capacitance calculated by the first capacitance calculation unit (21) by the capacitance per unit length calculated by the second capacitance calculation unit (22).