What is the measuring principle of the fruit hardness tester? How is a fruit hardness tester measured?

The fruit hardness tester, also known as the fruit hardness tester, is a professional instrument for measuring the hardness of fruits such as apples and pears. The use of fruit hardness tester is very extensive. In the fields of cultivation of good seed, harvest storage, production transportation and processing, etc., the hardness of fruit needs to be tested. Because fruit hardness is a relatively abstract matter, if it cannot be specifically expressed, then this information cannot be used to guide fruit production, processing, storage, etc. Therefore, the modern fruit hardness is calculated by the formula, and the determination of the fruit hardness tester The principle is also based on this formula.

Fruit firmness generally refers to the pressure (N) of a fruit unit area (S) subjected to a dynamometric spring. Their ratio is defined as the fruit firmness (P). The formula for the hardness of fruits is P=N/S, where P is the hardness value of the tested fruit, the unit is 100,000 Pascals or (kg/cm2); N is the force of the force-measuring spring pressure on the surface of the fruit, the unit is N Newton Or (kg); S is the force area of ​​the fruit, in square meters or (cm2). The fruit hardness tester calculates the hardness value of fruit by applying pressure to the fruit sample and calculating the force required by the fruit hardness tester's indenter to press the fruit sample. The fruit hardness measured by the fruit hardness tester has the advantages of high measurement accuracy, convenient carrying, and intuitive display of numerical values.
The above briefly introduces the determination principle of the fruit hardness tester. Now let's talk about how the fruit hardness tester measures. When using a fruit hardness tester to measure fruit hardness, hold the fruit hardness tester in the right hand so that the fruit hardness tester is perpendicular to the test. On the surface of the fruit, the indenter is pressed into the fruit under the effect of even force. At this point, the pointer starts to rotate. When pressing to the indenter line (pressing 10 mm), the scale value of the pointer is measured. The hardness value. At present, the fruit hardness tester is widely used by fruit tree research departments, fruit companies, fruit tree farms, agricultural colleges and other institutions, and has played an important role in practical work.