Four aspects of the evaluation of color performance indicators

With the progress of society, people's living standards continue to improve, catering, entertainment and other aspects of the demand is not satisfied with the status quo, rice processing industry is no exception, people on the quality of rice, quality and so put forward higher requirements, The degree of fine rice processing technology and equipment to promote the continuous improvement and development, the birth of the color machine, dedicated to the separation of rice in the different color particles, gravel, glutinous rice flour, powder particles and so on. This paper evaluates the performance indicators of the color selection machine from four aspects, so that it has a clearer understanding of the color selection machine.
One, sort of rate
Color machine in the processing of rice is the main role in the selection of different color particles (colored particles, powder particles, glutinous rice, stones, glass, etc.). Therefore, the heterochromatic sorting rate is one of the main technical indicators to evaluate the performance of color selection machine. It is well known that the calculation method of the sorting rate is the ratio of the selected isocysts to the preforms. General foreign color machine manufacturers commitment is in the different color content of 2% and design output, the sorting rate of 95%; with the development of color selection technology, the emergence of new high-performance color selection machine, the color selection machine Select the rate and put forward higher requirements, some suppliers promise in the heterochromatic content of 2.3% and design output, the color selection machine sorting rate can reach 97%; in the machine different color content of 6% Of the conditions, the need to reduce the flow rate to ensure that the sorting rate of 95%.
Second, bring out the ratio
The ratio of the ratio of good rice (good) in the election is generally expressed as defective, finished product or good product. That is, each shot out a number of defective products, for the color filter without a check, only after a selection of different color particles will be separated, so bring out than may be higher, and with a check Of the color selection machine, the election of the defective and then the second selection, so that the election of the finished product to reduce, bring out significantly lower. Under normal circumstances, bring out the main reason is too high caused by high sensitivity, and sometimes to enhance the color selection machine sorting rate, then adjust the degree of sensitivity, increase the number of solenoid valve injection, there will be significantly higher than the situation. It should be noted that the evaluation of the out of the ratio, are in a certain sorting rate conditions. Sorting rate is high, bring out the low, indicating the color selection machine selection performance is good. Generally out of the ratio should not exceed 1: 1, bring out the high will affect the rice rate of rice.
Third, the sensitivity
Color machine sensitivity indicators, generally not specified in the contract specifications, but in the equipment selection or selection of suppliers as one of the conditions. From two aspects: one is the color selection machine on the degree of selection of light yellow rice, under normal circumstances, the color selection machine alone selected light yellow rice, the sorting rate is difficult to reach more than 95%, generally 80% ~ 90%. This means that if the same light yellow rice test, in the flow of certain circumstances, the higher the sorting machine color selection, the higher the sensitivity of the color machine, rather than blindly by increasing the sensitivity to complete; , Can also be fine rice from the affected area of ​​the size of the victim to judge. This is mainly determined by the pixels of the color selection machine CCD. In the 1990s, the color selection machine had a minimum selection area of ​​1mm2 for the victim pellets. At present, with the continuous improvement of color selection technology, some equipment for the victim area of ​​less than 1mm2 of the victim can also be selected particles, indicating from the design point of view to improve the sensitivity of the color machine.
Fourth, stability
Color machine in the normal work of the case, the rice grain at 3m / s speed in the chute slide, and select a different color particles, through the CCD identification, signal feedback, separation and other processes, these processes are automatically completed in an instant Of the people can not control it. Therefore, the color machine should be required to have a certain degree of stability and automation, in any case, must ensure continuous operation to ensure that the lights continue to darken, the equipment automatically adjust to ensure that the selection rate unchanged. In the raw material conditions change, through the operator's reasonable adjustment, can still ensure that in a certain range of sorting rate unchanged, the accident rate is low, wearing parts long life.

CSG Color Sorter from the above four aspects have a good performance