A Measuring Method for the Length of Thin Threads

Abstract

The invention discloses a measurement method for the length of thin thread-shaped objects. The technical scheme adopted by the invention is that the measurement method comprises the following steps of setting two glass culture dishes with higher transparency and printing on cellophane to form grid cellophane; adsorbing the grid cellophane to an upper glass culture dish by using an adsorbing agent, dropping a layer of floating carrier agent in a lower glass culture dish and dispersing and placing the thin thread-shaped objects in the lower glass culture dish and enabling the thin thread-shaped objects not to be overlapped; placing the upper upper glass culture dish in the lower upper glass culture dish and counting total cross points of horizontal and vertical grid lines of the thin thread-shaped objects and the grid cellophane; converting by using an improved criss-cross method formula that R is equal to 11 / 14*N*a to obtain the length of the thin thread-shaped objects. According to the measurement method disclosed by the invention, the sizes of the grids are designed by the using printable cellophane and combining specific measurement conditions; meanwhile, by adopting a splint-shaped upper-lower culture dish structure with two layers of light-transmitting glass, the thin thread-shaped objects to be measured do not float in a carrying agent easily and further the measurement result is more accurate. The measurement method has the advantages of simpleness in use, strong feasibility and high accuracy.

Description

technical field

[0001] The invention relates to a measuring method, in particular to a measuring method for the length of a fine thread, belonging to the technical field of measurement. Background technique

[0002] Measuring the length of the tiny roots of plants and mycelium and other scattered threads with a diameter of less than 1mm is an important part of studying the interaction between plant roots and underground fungi. However, the current traditional root scanning instruments are not accurate enough for the measurement of such linear objects. In order to measure the length of thread-like objects below such diameters, people can only rely on the traditional cross method (author: Newman, E "Amethodofestimatingthetotallengthofrootinasample" "JournalofappliedEcology" 139-145, 1966), and use the improved cross method formula R= 11 / 14×N×a is converted to measure the length of the thin linear object, R is the length of the measured object, N is the number of intersections...

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