Soil moisture tester national standard detection and measurement accuracy

The soil moisture tester plays an important role in the field of moisture detection. There is a certain contradiction between the measurement accuracy and the measurement speed. In view of this situation, there is provided an apparatus for rapidly determining moisture with a drying method. Soil moisture tester ensures accurate weighing; circular infrared heating source, rapid drying of the sample; in the drying process, the soil moisture tester continuously measures and instantly shows the sample lost moisture content%, after the drying process is completed, the final measured moisture content value Locked to show. Compared with the international oven heating method, infrared heating can quickly and uniformly dry the sample at high temperature, and the sample surface is not easily damaged. The detection results are in good agreement with the national standard oven method, which is replaceable, and the detection efficiency is much higher. In the oven method. Intelligent operation, general samples can be measured in just a few minutes, is a new type of rapid detection equipment.

Soil water is the main source of plant water absorption (except for hydroponic plants). In addition, plants can directly absorb a small amount of water that falls on the leaves. The main source of soil water is precipitation and irrigation water, and it participates in the water cycle of the lithosphere-biosphere-atmosphere circle-circle-water circle.

The analysis of the soil moisture tester found that the soil moisture mainly comes from atmospheric precipitation and irrigation water. In addition, the increase of groundwater and the condensation of water vapor in the atmosphere are also sources of soil moisture. Moisture forms various types of water and reflects different properties due to various forces such as gravity, capillary attraction, water attraction, and gravitation on the surface of soil particles. Solid water, ice crystals formed when soil water freezes. Vapor water, present in the soil air. Bound water, including hygroscopic water and membrane water. Free water, including capillary water, gravity water, and groundwater.

CNC Milling is to use the rotating multitool to cut workpieces, such processing method is efficient. Tool rotate (background) while working, and the workpieces move (as a feed movement), workpieces can also be fixed, but at the moment, rotate tool must also move (at the same time to complete the main motion and feed motion).Milling machine has a horizontal milling machine or vertical milling machine, large gantry milling machine.The machine tool can be ordinary machine tool, can also be a nc machine tools. With rotating cutter as a cutting tool.Milling is generally conducted on milling and boring machine, suitable for processing plane, groove, all kinds of forming surface (such as spline gear and thread) and special shape mould surface, etc
The characteristic of the CNC Milling is:
(1) cutter blade periodically participate in continuous cutting.
(2) each blade in the process of cutting, cutting thickness is variable.
(3) each tooth feeding alpha f (mm/teeth), said cutter every turn a blade workpieces relative displacement of time.

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