What is the definition and application range of wood moisture content
1. Definition of wood moisture content:
my country defines the moisture content of wood as the percentage of the weight of moisture contained in the wood and the weight of the wood after drying.
The moisture content can be calculated based on the weight of the dry wood, and the calculated value is called the moisture content, and is referred to as the moisture content (W, %). Calculation formula:
W=(Gs-Ggo)/Ggo×100%,
W1=(Gs-Ggo)/Gs×100%
Among them: W——Wood moisture content; W1——Wood relative moisture content
Gs—wet wood weight;
Ggo——Gauze dry weight.
National standard: moisture content is 3.0 -10.0%.()
moisture content of wood
The water in standing trees is not only the substance required for tree growth, but also the carrier for trees to transport various substances.
Likewise, the moisture in wood affects both the storage of wood and the utilization of wood for processing.
Different species of wood have different moisture content. The change of wood moisture content affects the strength of wood within a certain range,
Rigidity, hardness, wear resistance, thermal conductivity, permeability, calorific value, volume stability, etc.
There are two ways to express the moisture content of wood.
2. Technical indicators of wood moisture tester
1). Measuring range: 3-55% moisture content.
2). Measuring time: 1 second.
3). Resolution: 0.1%.
4). Power supply: 9v battery.
5). Display mode: LED.
Technical level: Compared with the traditional drying weight loss method to measure moisture, the instrument has the advantages of fast, accurate, non-contact and no damage to samples. There are density and temperature compensation measuring devices in the instrument, which can correct the inaccurate measurement results caused by changes in layer thickness and material density. For example, when the load on the belt changes and the density of the material in the conveyor belt changes, corresponding compensation measurements are required. The whole instrument is controlled by microcomputer, which has the characteristics of automation and intelligence.
