Process and device for the measurement of the flow of raw sap in

Details Process and device for the measurement of the flow of raw sap in Process and device for the measurement of the flow of raw sap in

1986-05-30

1988-05-24

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

47 1R, G01F 168

Patent

active

047458054

ABSTRACT:
A process for the measurement of the flow of raw sap in the stem of a tree or other plant, and a device for the embodiment of the process. According to this process, two holes of small diameter are made in the stem, preferably one above the other, and a heating probe equipped with a thermocouple is introduced into the upper hole at the level of the sap-wood, and a non-heating probe is introduced into the lower hole. Comparison of the temperature allows a flow index K to be obtained which gives the value and which is related to the flow u by a law of type K=A u exp. B, where A and B are constants.

REFERENCES:
patent: 1766148 (1930-06-01), Sawyer
patent: 2924972 (1960-02-01), Biermann
patent: 3071520 (1963-01-01), Smalling
patent: 3246515 (1966-04-01), Martino et al.
patent: 3595079 (1971-07-01), Grahm
patent: 4016758 (1977-04-01), Taylor
patent: 4135396 (1979-01-01), Stanne et al.
"Velocity Distribution Patterns in Ascending Swanson Xylem Sap During Transpiration", in I. S. A. Flow-It Measurement & Control, vol. 1, pp. 1425-1430, 1974.

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