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Sun Z.,Jilin University | Sun Z.,Yangtze Normal University | Sun Y.,Jilin University | Wan P.,Huazhong Agricultural University | Li J.,Jilin Provincial Academy of Agricultural Machinery
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

A bionic chewing equipment was developed for food breakdown by simulating the masticatory system and using the bionic technology. Some parts were designed and assembled by reverse engineering method, like bionic teeth and temporomandibular joints. The equipment could realize 3-D chewing motion, the movement parameters were determined. Test of occlusive force showed that chewing force of equipment could break food and change with food. Masticatory experiment showed that masticatory efficiency of the equipment had no significant difference with subjects and its maximum value was 92.3%. The bionic chewing equipment was stable and reliable. Source


Jia H.,Jilin University | Li Y.,Jilin University | Qi J.,Jilin University | Fan X.,Jilin Provincial Academy of Agricultural Machinery | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

At present, acquisition of soil compaction for sowing line surface needs people to get into the field again after the operation of agricultural machinery, which is labor intensive, time consuming and belongs to non-real-time measurements. A soil compaction acquisition system for sowing line surface was designed based on ZigBee technology. A linear displacement transducer was used as measuring sensor to measure expansion amount of wheel spoke of press wheel in the system, and CC2530 was chosen as main control chip to realize module control and data wireless transmission. The main control chip CC2530 and the sensor were connected at child node to collect and store the measurement data of the sensor. The measured data of the sensor were sent to the main node. The main node received data from the child node and vehicle speed sensor, and the soil compaction measurement was realized based on mathematical model. The mathematical model was established based on the relationship between expansion amount of wheel spoke of press wheel and soil compaction to realize data acquisition of soil compaction. Field test was conducted to validate the system's performance, which showed an average relative error of 6.3% and maximum relative error of 13.3%. The system can realize real-time acquisition and wireless transmission of soil compaction information for sowing line surface, which can provide technical support for real-time adjustment of pressure. © 2015, Chinese Society of Agricultural Machinery. All right reserved. Source


Wu W.,Jilin University | Liu C.,Jilin University | Liu C.,Jiamusi University | Han F.,Jilin University | And 4 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

Several grain storage problems were analyzed in the article in the existing grain storage security system in China, due to the loss of the grain postpartum, and the backward technology and equipment. Relevant data and charts from Jilin Province, taken as an example of China's major grain producing area, were discussed. The discussion showed that it was necessary to develop the grain drying technology and equipment in grain producing areas. From the current national policy about the grain drying and storage, and the situation of the present grain drying technology, China has the ability to popularize the mechanical grain drying in different rural areas with the supporting techniques. Experts suggest that it takes about 10 years to carry out the project as "Popularizing the Mechanical Grain Drying in Rural Areas" with its aim of "One village with one dryer, and one family with one storage granary", to replenish the state grain depot, and establish the high efficiency and low loss system of national security grain storage system with the Chinese characteristics. Source


Li J.,Jilin University | Li J.,Jilin Provincial Academy of Agricultural Machinery | Zhang Y.,Jilin University | Wu W.,Jilin University | And 2 more authors.
Advanced Materials Research | Year: 2012

This paper presents a grain moisture measurement method based on storage pressure. The system mainly includes the structure and circuit hardware design of a test sensor. The software system using visual programming language, combined with MATLAB, established a grain moisture model, to achieve the measurement on grain moisture. Finally, the experimental analysis was made on the system. The results show that this moisture measurement method is practical and stable. © (2012) Trans Tech Publications. Source


Sun Z.,Jilin University | Sun Z.,Yangtze Normal University | Sun Y.,Jilin University | Li Y.,Yangtze Normal University | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2012

The bionic chewing equipment and parodontium were designed by bionic technology and two stages, a signal amplifying circuit was made, the testing software was developed by Visual C++, and then the bionic food texture analyzer was set up. Apples and carrots were measured by using this texture analyzer and the corresponding experiments were done and results were contrasted with those from panelists and the universal food texture analyzer. Pearson correlation coefficients showed that test values of the bionic food texture analyzer and sensory evaluation had a good relationship, the correlation coefficients with apple's hardness, crunchiness were 0.970, 0.904, and with carrot's hardness, crunchiness were 0.961, 0.971. The data are better than the coefficients from the universal food texture analyzer and sensory evaluation. Source

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