scholarly journals Design and Development of A Three-Point Auto Hitch Dynamometer for An Agricultural Tractor

2017 ◽  
Vol 20 (3&4) ◽  
pp. 271-288 ◽  
Author(s):  
A. F. Kheiralla ◽  
A. Yahya ◽  
M. Zohadie ◽  
W. Ishak

This paper describes the design, development and calibration of a three-point auto hitch dynamometer for measuring the horizontal and vertical forces that existed at the three-point hitch of an agricultural tractor.  The design concept of the dynamometer was based on an instrumented inverted U frame assembly that was mounted between tractor links and implement. The design incorporates for both lower point hitch spread and mast height adjustments, and quick hitch capability in accordance with category 1 and II three-point hitch system.  The force sensing elements were comprised of three steel extended octagonal ring transducers that were located between the inverted U frame and hook brackets.  Electrical resistance strain gauges were mounted on the extended octagonal ring transducer at strain angle nodes to independently monitor strains that were proportional to the horizontal and vertical forces at the ring center. Each transducer was designed for maximum horizontal and vertical forces of 25 kN and 10 kN at measurement mean sensitivities of 25.19 µStrain/kN and 25.60 µStrain/kN, respectively. However, the complete dynamometer has been designed to measure the maximum resultant horizontal and vertical forces of 50 kN and 20 kN, respectively.  Field demonstration tests on the dynamometer and data acquisition system showed that they were able to function effectively as intended.  The data acquisition system was able to successfully scan and record the dynamometer signals as programmed.  This dynamometer was part of the complete instrumentation system to be developed onboard a Massey Ferguson 3060 tractor for the generation of a comprehensive database on the power and energy requirements of the tractor and its working implement in the field.

2016 ◽  
Vol 112 ◽  
pp. 752-756
Author(s):  
Kumar Rajnish ◽  
Dipal Soni ◽  
Sriprakash Verma ◽  
Hriday Patel ◽  
Rajesh Trivedi ◽  
...  

Author(s):  
Adrián Gonzalo Stacul

<pre>The main purpose of this paper is the design, development and implementation of a <span>PCM</span> bit-<span>synchronizer</span> based on a System Generator and <span>Simulink</span> model. The entire system will be applied to a ground station with an ad-<span>hoc</span> <span>telemetric</span> data acquisition system to be applied in <span>UAV</span> monitoring and sounding rockets. Based on this information, the ground station will compute the platform trajectories, velocities and attitudes. </pre>


2017 ◽  
Vol 65 (1) ◽  
pp. 67-72
Author(s):  
Md Habibur Rahman ◽  
Nasif Shams ◽  
Gour Chand Mazumder ◽  
Saiful Huque

This paper describes the design, development and performance of a locally developed data acquisition system for solar PV module with variable load. The system can automatically change the operating point of a PV module and acquire the output voltage and load current into computer and then analyze. To change the operating point, a variable load has been developed by IRF250 MOSFETs. The current drawn by the load from the PV module is controlled by a staircase voltage, which is developed by a counter and a DAC. The count value of the counter and hence the voltage level of the staircase is changed by an Arduino-based controlling unit. To get the short-circuit current, the PV module is connected in series with a high ampere power supply and the voltage across the PV module is conditioned by a difference amplifier and fed to an ADC channel of the controlling unit. The output current of the PV module has been sensed by a Hall sensor, ACS712, and read by another ADC channel. To make the whole system automatic, a program has been developed using Arduino IDE and loaded in the Arduino board. With the help of this program, the system can measure the current and voltage of the PV module and send to a PC. This acquired data is processed by software and the performance of the PV module is obtained. The system has been developed in laboratory and its performance has been studied. Although, there are some fluctuations in the acquired data but with filtration satisfactory performance is obtained. This instrument can be used for PV module testing purpose. Dhaka Univ. J. Sci. 65(1): 67-72, 2017 (January)


Author(s):  
Y. H. Shaikh ◽  
A. R. Khan ◽  
K. B. Patange ◽  
J. M. Pathan ◽  
S. H. Behere

This paper presents the study of dynamic electrical resistance of the electrodeposition cell during the growth metallic dendrites showing fractal character. The electric resistance of the circular electrodeposition cell is measured in real time using a computer based data acquisition system. The data acquisition system constructed is capable of measuring the cell voltage and the current through the cell under program control at pre-decided intervals. This allows for the measurement of the dynamic electrical resistance of the electrodeposition cell. The system is based on standard analogue to digital controller ADC interfaced to the computer through the printer port.


2011 ◽  
Vol 2 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Y. H. Shaikh ◽  
A. R. Khan ◽  
K. B. Patange ◽  
J. M. Pathan ◽  
S. H. Behere

This paper presents the study of dynamic electrical resistance of the electrodeposition cell during the growth metallic dendrites showing fractal character. The electric resistance of the circular electrodeposition cell is measured in real time using a computer based data acquisition system. The data acquisition system constructed is capable of measuring the cell voltage and the current through the cell under program control at pre-decided intervals. This allows for the measurement of the dynamic electrical resistance of the electrodeposition cell. The system is based on standard analogue to digital controller ADC interfaced to the computer through the printer port.


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