手推式地面清潔機(jī)設(shè)計(jì)

手推式地面清潔機(jī)設(shè)計(jì),手推式地面清潔機(jī)設(shè)計(jì),手推式,地面,清潔,設(shè)計(jì) AbstractAn electric control and data acquisition system of longitudinal axial flow cleaning device test-bed was designed based on the technology of computer aided testing. The system can collect real-time data, adjust the parameters timely, operate simply, provide reliable data for experimental study of cleaning device. The experiments show that the accuracy of cleaning experiment data is improved by the system, which has significant guide to experimental study, design and manufactory of cleaning device. Key words: longitudinal axial flow, air-and-screen cleaning device, electric control,acquisition system I. INTRODUCTION he air-and-screen cleaning device is an important part of the combine-harvester, which affects the machine work performance directly. Therefore, it is significant to study the performance of cleaning device. But due to the field conditions are diverse, field experiments are strong seasonally and poor repeatability, some experiments cannot proceed in the field, therefore, it is necessary to develop cleaning test-bed, which is used to simulate and reproduce the whole process of cleaning, obtain the performance and working parameters of the key components.Traditional test methods adopt experimental equipment of simulating instrument and simulated record device, the measurement precision and test efficiency are very low, which cannot meet the requirements of cleaning test cycle is long, lots of parameters, a large quantity of data and real-time acquisition 1-3. The computer test technology and electronic control technology are introduced into the experiments to achieve automation of cleaning test data collection and test process, provide scientific research methods to cleaning device performance study of harvest machinery,in order to get better cleaning testing results. II. THE INTEGRATE STRUCTURE OF CLEANING DEVICE TEST-BED The cleaning device test-bed is made up of feeding analogue devices, framework, centrifugal fan and adjusting mechanism, cross flow blower and adjusting mechanism, This work was supported by Science and Technology Plan Projects of Heilongjiang Province Agricultural Reclamation Bureau (HNKXIVZD - 024) Yifeng Zhang is with college of engineering, Heilongjiang Bayi Agricultural University, Daqing, 163319, China. Mobile: 13836961961 E-mail: zhang_. vibrating screen frame, screener, shuttle board, drive gear, take-up pan, wind speed sensor, integrated console, data acquisition systems,torque sensor, motor, etc. The structure parameters and operating parameters can be adjustable,can meet the test requirements of axial flow cleaning device by adjusting the sieve crank radius, crank rotational speed, centrifugal fan rake angle, fan rotational speed, fan position, vibrating screen obliquity, shuttle board length and replacement of different types of sieving slice, etc.The structure of test-bed is shown in figure 1. III. DESIGN OF THE ELECTRICAL CONTROL AND DATA ACQUISITION SYSTEM The electric control and data acquisition system of test-bed was designed, which can collect real-time data of environment temperature, environment humidity, fan rotational speed, fan torque, fan power, feed speed, rotational speed of vibrating screen shaft, torque of vibrating screen shaft and the screen surface wind speed etc., through the operation cabinet, the system can control real-time size and switch of vibrating screens vibration frequency, fan rotational speed, feeding speed etc. The control principle and main circuit diagram are shown in figure 2, 3. A. Hardware System Measurement and control hardware system of the cleaning device test-bed include torque sensor, rotational speed sensor, wind speed sensor, environmental temperature sensor, humidity sensor, the data acquisition card, inverter, frequency control motor, integrated console, PLC and industrial control computer, printer,etc.,its composition as shown in figure 4. Parameters of the cleaning device experiment should be measured are as followed: feeding roller speed, centrifugal fan speed and torque, centrifugal fan outlet angle, cross flow blower speed and torque, the crank rotational speed and torque, eccentricity, vibrating screen obliquity, vibrating screen amplitude,etc., the parameters of eccentricity, centrifugal fan export obliquity and vibrating screen obliquity can be measured by human, the rest parameters can be input computer through the sensor directly. The Design of Electric Control and Data Acquisition System for Cleaning Device Yifeng Zhang and Shujuan Yi (College of Engineering, Heilongjiang Bayi Agricultural University, Daqing163319, China) T 1828 978-1-4244-8736-3/11/$26.00 c2011 IEEE Illustrate :1 electrical cabinet 2 Thread storage box 3 centrifugal fan rack4 centrifugal fan electrical machine 5 centrifugal fan 6 adjustable speed motor 7 shuttle board 8 crank connecting link driving mechanism9 feeding analogue devices 10 upper vibrating screen 11 under vibrating screen12 discharge grain roll 13 main frame 14 take-up pan 15 cross flow blower 16 cross flow blower electrical machine 17 cross flow blower frame Fig. 1. General assembly drawing of cleaning device test-bed ; ; ; ; ; .0.0 ; 46 .0.0 K 0 :three times rotational speed pulse total numerical value. Similarly,torque for: 1 0 00 1 3 0.33 1000 pp K f ff T MN N K ff ff = = (2) Type: M:torque Nm; F:the current output frequency; N:torque measuring range 500 Nm; K 1 : total numerical value of three times torque pulse; f 0 : zero output frequency of torque; f p : output frequency of forward direction full range. 2) PLC Communication Parts Aftert PLC converts pulse signals to the corresponding rotational speed and torque values, store it in fixed region of a variable storage area, serial of PLC has been in receiving state, after receive read command of the industrial PC, convert to sending status, data of the variable storage area is sent to industrial PC through a serial port. Considering the transceiver switching have certain time interval, so the system with timing interrupt 1 to produce 5 ms delay time to send again. PLC communication service processes as shown in figure 7. ,07B2 FRQQHFW WR FRPSOHWLRQ HYHQW LQWHUUXSW RSHQ LQWHUUXSWHG VWDUW LQLWLDO SLQ ,17B2 UHFHLYLQJ FKDUDFWHU HQG FRPPXQLFDWLRQ PDLQ SURJUDP UHDG FKDUDFWHUV WR 9% 9% 5 1 UHFHLYLQJ FKDUDFWHU ,17B FRQQHFW WR WLPHU LQWHUUXSWLRQ ,17B VHQG FKDUDFWHUV FORVH WKH WLPHU LQWHUUXSWLRQ Fig. 7. Flow diagram of communication with the PLC 3) Monitor Parts of Industrial PC The main functions of the software:this software based on PLC serial communication way, can undertake data acquisition, display, storage and load for rotational speed and torque of vibrating screen, speed and torque of centrifugal fan, speed and torque of cross flow blower, wind speed, the environment temperature and environment humidity. Data format stores for XML and XLS. Software operating condition The hardware requirements:CPU For Pentium III 800M above, memory is not less than 64M, the remaining space need 1G above.The operating system:the operating system need windows 2000 or windows xp. The software is green without loading and unloading, just copy to the disk or delete simply. Main interface of software:detection software uses visible programming language, main interface of detector software is shown in figure 8. 2011 Chinese Control and Decision Conference (CCDC) 1831 Fig. 8.Data acquisition and control system main interface of the test-bed for cleaning device . CONCLUSION An electric control and data acquisition system of cleaning device test-bed was designed with the view of collecting real-time data and timely adjusting the parameters through computer. Through the electric control and data acquisition can collect real-time data of environment temperature, environment humidity, fan rotational speed, fan torque, fan power, feed speed, rotational speed of vibrating screen shaft, torque of vibrating screen shaft and the screen surface wind speed etc., through the operation cabinet can control size and switch real-timely of vibrating screens vibration frequency, fan rotational speed, feeding speed etc. Through experiment show that the designed electric control and data acquisition system of cleaning device test-bed is superior in precision and reliability, easy operation,and easy to adjust, provides a basis for axial flow cleaning device design and experimental research in the future. REFERENCES 1 Shujuan Yi, Min Li, Chen Meng. “Computer Data Acquis ition System of Gra in Thresh ing and Separating In stallation” J. Journal of agricultural machinery, 2005, pp. 99 103. 2 Binbin Ji, Jin Chen, Yaoming Li. “Design and Test Re search of a Data Acquiring System Used in the Thre shing and Separating Equipment for the Combine Experiment” J.journal of measurement and control technology. 2004 (6) ,pp. 92 94. 3 Lizhang Xu, Yaoming Li, Ligong Zhang , Tiecheng Sun. “Development on Test-bed of Axial Threshing and Cleaning Unit”J. Journal of agricultural machinery. 2002 , pp. 85 88. 1832 2011 Chinese Control and Decision Conference (CCDC)