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There are two important aspects that need to be considered in determining rice grades using rice grader machine;
grading technique and determinants to be used for grading (usually
referred as rice attributes). Many approaches and techniques have been
used in the determination of the features of rice for grading purpose.
These are the image processing together with NN, Wavelet Packet and
Support Vector Machine, Contacting Angle Analysis method (separating
contacting rice grain), Multi-threshold method based on maximum entropy
(chalkiness), Minimum rectangle (MER)(length and width), image
processing and the Adaptive Network Based Fuzzy Inference System
(ANFIS), image processing, image processing and NN with support from
computer vision systems and machine vision systems. Most of the
researchers have used image processing and NN method in their works.
Image processing have been used to extract the features in rice and
based on these features extracted, chosen rice is classified or graded
using the NN method.
Rice grading is important in determining
rice quality and its subsequent price in the market. It is an important
process applied in the rice production industry with the purpose of
ensuring that the rice produced for the market meets the quality
requirements of consumer. Two important aspects that need to be
considered in determining rice grades are grading technique and
determinants to be used for grading (usually referred as rice
Today's image processing techniques has become an
increasingly popular and cost effective method in rice grading. Yoshioka
et al. evaluated the effectiveness of image information processing to
measure and categorize chalkiness. These results generated an accuracy
rate of 90.2% in discriminating level of chalkiness. Aghayeghazvini et
al. determined percentage of broken rice by using image analysis. This
work indicates that the digital image processing technique can be used
for estimating broken grains. Determination of the size and size
distribution of rice and the amount of broken rice kernels using flatbed
scanning and image analysis was developed by Dalen. It was concluded
that image analysis yields the same accuracy and better precision than
manual time consuming method. A digital image analysis algorithm based
on 7 colour features namely mean value of red (R), mean value of green
(G), mean value of blue (B), mean value of hue (H), mean value of
saturation (S), mean value of intensity (I), the standard deviation of H
and morphological features such as area, length, width, major axis
length, minor axis length and others were developed by Yan et al. to
identify rice seeds planted in Zhejiang province.
roll is made up of a cylindrical cast-iron roll which is tightly fitted
to the main shaft. The whitening roll has a helical protrusion with an
opening at the side to permit air to pass through the rice whitener machine
for cooling purposes. Brown rice upon reaching the whitening chamber
moves between the cylindrical castiron roll and the movable perforated
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Rice is our human main meal in our daily life, especially in foreign
countries. However, in recent years, rice milling machine industry faces
depression affected by global economic crisis. rice milling machine in
China and foreign countries strikes the market, bringing big economic
pressure to rice milling machine suppliers. Faced with depressive
market, paddy separator machine manufacturer
china-zjlg improves scientific technology to realize rice milling
machine industry development. rice milling machine should reduce energy
consumptions at maximum by bring in advanced machinery, enhancing
operation efficiency and decreasing management and financial costs. Only
by mutual hard work of the rice milling machine supplier and the
government, can the rice milling machine industry get better
development in market depression.
The husk as received from Rice
Mills and charged into a dust separator, then sieved to separate dust
from husk. The rice husk is then dried and powdered. The powdered rice
husk is then segregated according the size. Cleaned husk and the
powdered husk is charged into a blender separately and then mixed and
coated with a propriety resin on to the Husk which is called furnish.
The "Furnish" is spread over a carrier sheet to a pre-determined
thickness manually, layer by layer to form a sandwich
(fines-coarse-fines) and charged on to a loading cage. The loading cage
shall load all the 7 sets into a 7 day light opening hydraulic hot
Complete sets of engineering In order to satisfy the
users' different demands of rice milling equipment performance, and
china-zjlg absorb the advantage of the rice milling equipment at home
and abroad, and combining the actual situation of user rice raw
materials, the development of different types of international
configuration sets of rice milling equipment, using large-scale
industrialized production and strict quality control procedures, to
help users obtain cost-effective sets of rice milling equipment, and by
the professional engineering company to provide users with design,
manufacture, installation, supervision, commissioning, training, and
other one-stop service.
An automatic control system was developed for controlling rice whitener.
The system was designed based on machine vision and fuzzy logic
techniques. The developed system had a high accuracy in controlling of
the whitening machine. Performance speed of the system was
satisfactorily higher than human operator. Decisions made by the system
resulted in a good improvement in the quality of product.
a word, china-zjlg will continue to strive to provide you with higher
quality, but also hope that you support us, welcome to leave a message.
Paddy seed were taken from paddy silo storage after drying by using rice polisher.
The moisture content of the paddy seed was 12% which is the safe
moisture content for paddy seed in silo storage. They were then brought
to a laboratory and stored at room temperature in a closed tight
container and the moisture content of the seeds was checked by using G7
grain moisture meter).The sample taken consist of paddy seeds and other
foreign materials such as paddy husks, soil, chaff, stones, weed, rice
straw, stalks, and insects. An air screen cleaner was used to separate
seeds and foreign materials. The sample was filtered for five times.
Paddy seeds and paddy husks were later collected to be used in the
experiment. Paddy seeds and paddy husks were arranged in a 6x5 array for
20% husk (6 husk and 24 paddy seeds), 40% husk (12 husk and 18 paddy
seeds), 60% husk (18 husk and 12 paddy seeds), 100% husk (30 husk) and
100% paddy seeds (30 paddy seeds) with 10 replications.
rice kernels are often susceptible to breakage due to inefficient
milling processes. Therefore, more efficient milling processes are
highly recommended for better recovery ratio and quality rice kernel
production. It is also identified as one of the most important remedies
for preventing post-harvest loss and an issue that is widely recognized
around the world. With the facts mentioned above, this study tries to
explore the conversion ratio of paddy in India by two different milling
techniques–modern and traditional mills. Variation in the conversion
ratio among the Indian States is analysed along with an inter-state
comparison of conversion ratios.
Using a friction laboratory
mill, a series of milling tests were carried out with long- and
bold-grained rice, IR 36. The process of milling can be divided into
husking and polishing; husking was rapid, while polishing was relatively
slow. Prolonged continuous-milling increased the degree of polishing
slightly, but caused a drastic increase in breakage. The
intermittent-milling permits an over milling without an increase in
breakage. No reduction in the percentage of broken rice was achieved by
2-stage milling, i.e. husking by a rubber roll huller and then polishing
by a mill.
The initial moisture content of paddy samples was determined on wet basis by automatic rice destoner.
Grain micrometer with an accuracy of 0.02 mm was used to measure length
(L), width (W) and thickness (T) of both paddy and brown rice kernels,
chosen randomly from each particular cultivar. Other physical properties
were then determined from these three major linear dimensions.
Rice as an agricultural material must have its husk removed (husked) in order to be useable as a commercial product. Two types of machine are commonly adopted in husking; impeller type and rubber roller husker. In impeller type husking machines the rice is scattered radially and husked by the impact of collision with an external surround. The impeller type huskers are not inherently inferior to rubber roll huskers, but continuing advancements of rubber roll type have led to their diminished use.
The processing of rice involves a number of discrete operations from husking to whitening and polishing. The efficiency of each affects the quality and hence market value of the finished product. Further, each of the operations is energy intensive and because the through put is so great can cause extreme wear to many of the machine parts. There is therefore great interest in maximising the efficiency, increasing machine reliability, and minimising damage to grains during such operations.
The husking performance of different rubbers was compared for changes in the applied normal load. It was found that grains rotate between the rubber counter-faces on initial motion before being husked. In addition, harder rubbers were found to husk a higher proportion of entrained grains at lower applied normal load. By measuring the coefficient of friction between rice and rubber samples, the shear force required to husk a given percentage of grains could be calculated and was shown to be constant regardless of rubber type. Based on the mechanism seen in the high speed video it was evident that there was a limiting shear stress that was the governing factor over the husked ratio.
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Fumigants are commonly used to prevent or eliminate insect infestations during rice storage in rice destoner.
During 2010, 8.5 million cwt of rice were fumigated in California,
using 12,327 pounds of fumigant active ingredients (DPR 2011). Prior to
our survey, the extent to which other management practices, such as
monitoring, sanitation and aeration, are used in stored rice was
The industry is moving forward despite considerable
challenges in the last year. Market recessions in regions such as South
America along with overcapacities in China and ongoing political
challenges have led to cancellations of orders.
Sharp drops in
raw material prices, such as rice and grain, also put a brake on
investments, suppliers noted. Devaluation of the euro by some 10% has
impacted suppliers’ cost base and competitiveness.
The world rice
production for over almost a decade (2003–2012) is as shown. In 2003,
about 580 million tons of rice was produced worldwide, 602 million tons
in 2004, 620 million tons in 2005, and 622 million tons in 2006. The
production continued to grow yearly; by 2007, the production had risen
to 648 million tons. The production reached the peak in 2011 with a
total production 720 million tons in order to feed the increasing
global population. Furthermore, the world’s annual production growth
rate was stagnated in 2012. The reason could be attributed to natural
disaster such as storm, tornado, and unfavourable climate as reported.
best benefits of modern enterprises from the leading technology, which
is reflected in the reasonable process and efficient energy-saving
equipment. We must provide the reasonable process, choose the correct
equipment configuration, not only the best quality and provide them
with the most intimate housekeeping service, this is what we can do,
also we should do. For more information, click Rice Destoner: https://www.china-zjlg.com/product/destoner-machine/
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