Design of an electro-mechanical slip measuring device | |
| Author | Ruiz, Jose A., Jr. |
| Call Number | AIT Thesis no.AE-78-16 |
| Subject(s) | Tractors--Wheels Electromechanical devices |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The main purpose of the work was to design, construct, and test a wheel slip measuring device. The device operates on electro-mechanical system having two sensors, each attached to the front and drive wheels of a tractor. The sensor consists of eight reed switches connected in parallel and a permanent magnet that rotates with the wheel. The rotation of the magnet intermittently opens and closes the reed switches that generates eight electrical pulses per wheel revolution. Electronic counters record these pulses that give information on the total number of wheel revolutions made by the tractor when traversing a certain distance. Calibration is accomplished by running the tractor over a known distance and taking the ratio distance/pulse for the r ear wheel at no load and for the front wheel at load. The first ratio multiplied by the total number of pulses in the rear wheel during field operation gives the theoretical distance covered during the run, while the second ratio multiplied by the pulses in the front wheel gives the distance actually covered by the tractor . Slip is computed by subtracting the actual distance from the theoretical distance and dividing the difference by the latter. The device is simple lightweight, and low cost, made mainly of PVC and aluminum. It is easy to install and can be operated by the tractor driver himself. Slip tests were performed in ploughing, harrowing and transporting operations in the field and compared with the conventional method. Results obtained by using the device gave less than one per cent error in calculating distance travelled and about three percent in wheel slip measurement. |
| Year | 1978 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Singh, Gajendra |
| Examination Committee(s) | Exell, Robert H.B. ; Jindal, Vinod Kumar |
| Scholarship Donor(s) | U.S. Regional Economic Development |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1978 |