2012 Vol. 2, No. 12

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Matching Design and Typical Applications of Tractor Intake System
He Fei, Zhao Chuanyang
2012, 2(12): 1-4.
Abstract(1020) [PDF 1039KB](8)
Abstract:
The agricultural diesel engine worked for long time in bad environment of high torque，high mechanical load and thermal load，high dust，and more than 85% of the engine had fault，such as early wear，fuel consumption high，unable to work，and the vast majority of above cases were related to air intake system design.Based on the actual production，through the author′s experiences for many years engaging in engine air intake system supporting and designing，the agricultural diesel engine intake system supporting，design principles and methods，and matched typical examples of application were described，in order to providing reference for the agricultural machinery design professionals and user.
Innovation Research of Grassroots Agricultural Machinery Extension System Running Mechanism in Shanxi Province
Zhao Jing
2012, 2(12): 5-7.
Abstract(956) [PDF 433KB](7)
Abstract:
Grassroots agricultural machinery extension system appeared gradually weakening in recent years.So，developments of agricultural technology extension and agricultural and rural economic were seriously affected.Major problems of grassroots agricultural machinery extension system in Shanxi province were analyzed based on findings.And system innovation was explored.Taking system innovation as method，promoting reform as major initiatives，building powerful social service system is real way of agricultural machinery extension.
Problems and Countermeasures of Agricultural Machinery Technology Training in Guang′an City
Hu Ping
2012, 2(12): 8-9.
Abstract(848) [PDF 583KB](4)
Abstract:
Problems of agricultural machinery technology training were studied by field survey and in-depth interviews in Guang′an city.The results showed that agricultural machinery technology training of Guang′an city have many problems.For example，strength of training teachers is very weak，enthusiasm of farmer training is not high，training facilities are incomplete，training funds are shortage.Some measures like increasing funds investment，organizing and managing elaborately，strengthening leadership and advocacy and targeted training were proposed to provide reference for agricultural machinery technical training of Guang′an city.
Boosting Agricultural Mechanization Development with Blending Agricultural Machinery and Agricultural Technology
Kang Liqing
2012, 2(12): 10-11.
Abstract(1157) [PDF 285KB](7)
Abstract:
Agricultural mechanization is the only way for the modernization of agriculture，and development of agricultural mechanization must coordinate relationship between agricultural machinery and agricultural technology.In order to continuously improve overall agricultural productivity，consolidate stable development of agriculture，and continuously increase income of farmer，combination of agricultural machinery and agricultural technology must be strengthened.Based on analyzing necessity and importance of blending agricultural machinery and agricultural technology，ways were proposed，including establish long-term mechanism about blending，promote subject research，concentrate on blending，and strengthen educational training.
Design and Analysis of Micro-environment Online Monitoring System in Northern Greenhouse
Yu Hui, Ji Jianwei, Li Zhengming, Zou Qiuying, Li Qinfu
2012, 2(12): 12-16.
Abstract(968) [PDF 781KB](9)
Abstract:
With analysis of greenhouse environment and control method，intelligent control system was designed，which was fitted to greenhouse in Northied China.Design structure was of distributed master-slave mode.STM32F103VCT6 was MCU core，which carried a lot of peripheral module.Mission of computer was to achieve the orders of customer and information collection，in order to realize real-time telemetry，adjustment and control.With the greenhouse environment monitoring to guarantee the growth condition of the crop，scientific，efficient and intelligent management of the greenhouse was achieved.
Application of Mathematical Morphology in Fault Signal Extraction
Zhao Xiling
2012, 2(12): 17-19.
Abstract(784) [PDF 446KB](5)
Abstract:
Mathematical morphology filter is a nonlinear digital filtering algorithm.It can effectively extract edge contour and geometric characteristic of signal.According to the characteristic of fault signal in rotating machinery，the morphology filter was improved.As most fault features were pulse signal，damped exponential signals were used as the structure element in morphology filter.Simulation showed that this method was efficient to extract the fault features of noise.
Application and Development of Sensor in Automobile
Xiao Jun
2012, 2(12): 20-21.
Abstract(939) [PDF 277KB](6)
Abstract:
Application and Development of Sensor in Automobile
Evaluation of Meteorological Conditions on Planting Chestnut in Tangshan Northern Mountain Area Based on DTOPSIS Method
Meng Yanjing, Yuan Suqin, Yang Fengrui, Gao Guiqin, Long Qiang
2012, 2(12): 22-25.
Abstract(886) [PDF 496KB](3)
Abstract:
In order to explore meteorological conditions characteristics of chestnut cultivation in northern mountainous places of Tangshan，according to climate requirements of chestnut growth cycle，combined with chestnut growth characteristics and ideas of fruit-tree experts；evaluation of comprehensive advantages on chestnut growth in northern Tangshan mountain area was made using DTOPSIS method.Results showed that there was not suitable to plant chestnut in all Tangshan northern countries（cities，districts）from the climate perspective.Qianxi town was the most suitable place to plant chestnut，secondly Qian′an，then Luanxian and Zunhua.It was unfit to plant chestnut in Zunhua，Fengrun and Yutian.
Improving Rural Ecological Environment，Constructing Civilized Well-off Society
Yao Ying, Wang Jing, Zhang Xiaoyong
2012, 2(12): 26-27.
Abstract(1009) [PDF 312KB](4)
Abstract:
According to build a well-off society goal request by 2020，present situation of rural environmental pollution were expounded actual economic situation.Agricultural pollution hazards were analyzed.And ideas and countermeasures for improving rural ecological environment and constructing civilized well-off society were proposed.It provides some references for department of environmental protection，government at all levels，and agricultural workers.
Application of Modified Atmosphere Packaging Technology in Food Preservation
Chang Rui
2012, 2(12): 28-30.
Abstract(1084) [PDF 387KB](6)
Abstract:
Modified atmosphere packaging technology can effectively prolong the shelf life of food.Mechanism of modified atmosphere packaging technology and main protective gas（carbon dioxide，oxygen and nitrogen）were introduced.On the basis of that，application of modified atmosphere packaging in food preservation，such as livestock and fresh meat，fresh fruit and vegetable，fresh fish and prawn，baking and cooked food，were summarized.
Preparation and Determination of Antibiotics Residues in Fresh Meat Using Auto Solid Phase Extraction and HPLC
Liu Zhaojin, Wei Chenggong, Li Xiujuan
2012, 2(12): 31-33.
Abstract(1006) [PDF 486KB](3)
Abstract:
A solid phase extraction method was established for preparation of antibiotics residues from chicken and pork.They were detected simultaneously using high performance liquid chromatography.The spiked recovery rate of terramycin，tetracycline，aureomycin ranged from 87.4%～97.9%，89.2%～92.7% and 89.7%～99.4% in chicken.The spiked recoveries ranged from 83.9%～97.9%，90.6%～108.0% and 98.1%～109.3% in pork.
Development Status of Drainage and Irrigation Machinery in China
Yang Xiaogang
2012, 2(12): 34-36.
Abstract(825) [PDF 590KB](7)
Abstract:
Drainage and irrigation machinery plays an important role in some field in China，like farm irrigation，drainage and drought control，keeping high yield，ecological environment improvement，and so on.Drainage and irrigation machinery industry had become more important than ever.Development status of drainage and irrigation machinery industry was expounded.That can better contribute to development of water conservancy industry.
Exploration of Budgeting for Land Consolidation Project in Chongqing City
Ma Jie, Liu Jinzhao
2012, 2(12): 37-39.
Abstract(1045) [PDF 565KB](6)
Abstract:
Basing on budget ration standard of land consolidation project，combing with the actual working conditions in the rural areas of Chongqing city，and analyzing about 158 land consolidation projects and 47 construction land reclamation projects in 2012，at the same time，some suggestions and measures aiming at solving of these issues were put forward in order to providing scientific basis for reasonable and normal use of the project fund in Chongqing city.
Design and Simulation of CNC Test Bench Based on Motion Controller
Dong Zhen, Zhang Lixin, Hu Xuelong, Lai Dengling
2012, 2(12): 40-42.
Abstract(1048) [PDF 521KB](4)
Abstract:
Controlling principle of CNC test-bench was discussed based on motion controller.Institutional design scheme was introduced.Entire test-bench adopting modularity design had simple structure，so that it was practical and easy to maintain.Against the friction problem within precision CNC test-bench，model and simulation of the servo system was implemented by MatlabSimulink.By comparing the simulation results with the known experimental data，the feasibility design of test-bench was verified.It provides the basis for subsequent improvement.
Design of Closed Circuit Fruits and Vegetables Preservation O2 Elimination Device
Jiang Xiumei, Jiang Xiulun, Sun Kuijun
2012, 2(12): 43-45.
Abstract(804) [PDF 405KB](3)
Abstract:
Key instrument was O2 absorber in the controlled atmosphere store.Closed circuit fruits and vegetables preservation O2 elimination device was designed successfully based on introduction，digestion and absorption of foreign advanced technology.With closed circuit working mode，machine was composed of frame，oxygen measuring instrument，molecular separation tank，induced draft fan，vacuum pump，filter and reversing valve，etc.This machine could decrease oxygen concentration and remove carbondioxide in storage of fruits and vegetables.Environments of low oxygen concentration and suitable carbondioxide concentration were beneficial to inhibit the respiration of fruits and vegetables，and that could reduce the loss of nutrients.Meanwhile，that could inhibit the propagation of pathogen and prevent the occurrence of physiological diseases.Machine had the advantages of cheap price，high automation and low energy consumption，its main performance index had reached or exceeded the international advanced level，now it had be used in lots of controlled atmosphere store in China.
Design of 4YZP-2A Type Self-propelled Corn Harverster
Han Shuzhi, Zhang Jianmin, Sun Chengjin, Zhang Yuna, Shen Peiguo, Li Dejie
2012, 2(12): 49-53.
Abstract(1340) [PDF 1068KB](9)
Abstract:
According to the characteristices of corn planting and harvesting in Huang-huai-hai region，4YZP-2A type self-propelled corn Harvester was designed.Structure design and technical features of whole machine，transmission system and main working parts were introduced.Picker header was made with rake star-wheel and no-row corn harvesting device，and corn plants would be effectively crawled and feed methodically to picking device.Optimization design and rational distribution were carried out with corn husker，ear peeling rate was greatly improved.Actual field working test proved that 4YZP-2A type self-propelled corn harvester was in line with the national standards，and it also passed the identification of Shandong Agricultural Machinery test and appraisal station.
Design and Research of Sheet-bending Part of Harvesting Machinery
Zhang Zhongfang, Yang Shengli, Zhang Guangwei
2012, 2(12): 54-56.
Abstract(941) [PDF 523KB](12)
Abstract:
Harvesting machinery industry developed quickly with state subsidies of agricultural machinery and customer satisfaction.Sheet metal forming technology followed with development of harvesters，mould for various bending forming was developed based on the discussion of harvesters sheet-bending.It provides some foundations for accuracy of sheet-bending part and flexibility of sheet production.
Research and Practice of Task-driving Teaching Method in MCU Course
Li Xu, Cai Peizhong, Kang Jiang
2012, 2(12): 57-60.
Abstract(1080) [PDF 536KB](4)
Abstract:
The MCU course is one of the main courses of mechanical major in Hunan Agricultural University，which features are strong practicality，comprehensiveness and applicability.Main problems of MCU course teaching in machine design，manufacture and automation speciality in Hunan Agricultural University were analyzed.Task-driving teaching method was proposed，and task teaching module was designed.Practice results showed that the teaching effect of task-driving teaching were better than effects of traditional teaching mode.Task-driving teaching method in MCU course was valuable to furtherly spread.
Quality Evaluation System of Post Practice for Food Processing Technology Major Students
Zhang Lifang
2012, 2(12): 61-63.
Abstract(1082) [PDF 388KB](3)
Abstract:
Higher vocational education is to train talents，and post practice is to cultivate high skill talented person′s important link of teaching.During the training，post practice plays a very important role.Based on the survey，quality evaluation system of post practice of enterprise staff，teachers，monitoring group and students was established.Quality evaluation system of post practice in higher vocational colleges was optimized.
Seed Production Techniques of Hybrid Cotton
Duan Lihui
2012, 2(12): 64-65.
Abstract(811) [PDF 272KB](3)
Abstract:
Yield of hybrid cotton has obvious advantages over conventional cotton.Demand for hybrid cotton was skyrocketed with increasing acreage.Seed production techniques of hybrid cotton were explored.It provideed some technical guidance for large-scale seed production.
Discussion of Management Organization Structure in Water and Soil Conservation Research Unit
Li Huaiyou, Zhao Ancheng, Zhang Xining
2012, 2(12): 66-70.
Abstract(1100) [PDF 773KB](3)
Abstract:
Seven management organization structure types（linear organization structure，functional organization structure，linear functional organization structure，business division organization structure，simulation decentralised organization structure，matrix organizational structure and complex organization structure）and their advantages and disadvantages were discussed.Management amplitude and management level of water and soil conservation research unit were analyzed.Balance and unity of centralized management and decentralized management in water and soil conservation research unit were discussed.Organization structure，management amplitude，management level and decentralized management mode of Xifeng station were analyzed.Composite structure，flat organization structure form，decentralized management are mechanism basis and system security for Xifeng station to get steady booming.They are also causes of sustained，rapid and booming success experience in Xifeng station.
Improved Quadtrac EP Series Four Crawler Tractors of CaseIH Company
Wu Qingfen
2012, 2(12): 71-74.
Abstract(659) [PDF 765KB](4)
Abstract:
Quadtrac EP Series 4 crawler tractor structural characteristics and technical performance of the main components of CaseIH company were described briefly.It provides a reference for China′s tractor industry further research and development of similar products.

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