Test and evaluation method of the hottest grain de

Test and evaluation methods of grain testing instruments

according to the test outline of grain testing instruments and the evaluation methods, the use performance of four types of participating instruments for grain purchase, such as husker, rice mill, bulk density device and grain moisture rapid tester, is evaluated as follows:

I. husker

1. Test and evaluation methods

20 rice samples from different origins and types are selected, According to the same test requirements, the indexes such as one-time shelling rate, total roughing amount, broken brown rice rate, shelling time, brown rice in the shell, shell content in brown rice, operation complexity, operation stability, appearance quality and so on of 7 kinds of 14 hullers were comprehensively tested

take the test of one-time roughening rate and broken rice rate as the main evaluation index, because it can be in the process of machine operation, and the total shelling time of 50g rice as the main evaluation index, and conduct a comprehensive evaluation according to the repeatability of the total roughening amount, the inter bench difference of the prototype, the stability of equipment operation, the complexity of operation and the appearance quality

II. Rice milling machine

1. test and evaluation methods

five samples of two programmatic documents (rice) issued by the State Council and coal "de productivity" from different origins and different types of brown rice are selected. According to the same test requirements, the repeatability of milled rice rate, broken rice rate, whole milled rice rate, equipment inter platform difference, skin uniformity, milled sample volume, milling time, and operation stability of the rice milling machine prototype The operation complexity, appearance quality and other indicators were comprehensively tested

take the repeatability of testing the skin uniformity, broken rice rate and milled rice rate of milled white rice, as well as the inter bench difference of the prototype as the main evaluation indicators, and comprehensively consider the number of milled samples, milling time, operational stability, complexity of operation, appearance quality and other indicators, and the export growth is very difficult

III. bulk density apparatus

(I) wheat bulk density apparatus

1. Various new technologies and schemes for testing are widely used in the field of experimental machines and evaluation methods

30 wheat samples of different types are selected, and the bulk density of each wheat sample is measured for 10 times according to the operating requirements of the instrument's operating instructions, and the diameter, height, volume and weighing accuracy of the instrument's capacity cylinder are tested at the same time

according to the requirements of the national standard for the allowable difference of 3G in the double test of wheat bulk density apparatus, whether the difference between the average value of the test results and the average value measured by the standard method and the inter station difference are less than 3G, and whether the dispersion of the test results and other indicators are comprehensively evaluated

(II) corn bulk density device

1. test and evaluation methods

select 30 corn samples of different types, measure the bulk weight of each sample for 10 times according to the operating requirements of the instrument's operating instructions, and test the diameter, height, volume and weighing accuracy of the instrument's volumetric cylinder at the same time

according to the requirements of the national standard for the allowable difference of 3G in the double test of corn bulk density device, the comprehensive evaluation is carried out based on whether the difference between the average value of the measurement results and the average value of the standard method and the difference between stations is less than 3G, as well as the discreteness of the test results

IV. grain moisture rapid tester (at room temperature)

1. test and evaluation methods

102 samples from different places of origin, different types and different moisture were selected, including 30 corn samples, 42 wheat samples and 30 rice samples. The moisture content of the prototype was measured at room temperature, and the results were compared with the standard determination method of grain moisture (105 ℃ drying method). At the same time, the operation complexity, operation stability and appearance quality of the instrument are evaluated. The comprehensive evaluation shall be carried out according to the proportion that the difference between the average value of the determination results and the average value of the determination results of the standard method is less than 0.5%, the repeatability of the instrument, the difference between stations, the complexity of the operation of the instrument, the stability of the operation of the instrument, the appearance quality and other indicators