How the resolution of a shaft encoder could be improved

Assignment Help Mechanical Engineering

Reference no: EM131199572

Explain how the resolution of a shaft encoder could be improved by pulse interpolation. Specifically, consider the arrangement shown in Figure P6.47. When the masking windows are completely covered by the opaque regions of the moving disk, no light is received by the photosensor. The peak level of light is received when the windows of the moving disk coincide with the windows of the masking disk. The variation of the light intensity from the minimum level to the peak level is approximately linear (generating a triangular pulse), but more accurately sinusoidal, and may be given by

where θ denotes the angular position of the encoder window with respect to the masking window, as shown, Δθ is the window pitch angle. Note that, in the sense of rectangular pulses, the pulse corresponds to the motion in the interval Δθ/4 ≤ θ ≤ 3Δθ/4. By using this sinusoidal approximation for a pulse, as given above, show that one can improve the resolution of an encoder indefinitely simply by measuring the shape of each pulse at clock cycle intervals using a high-frequency clock signal.

FIGURE P6.47

Reference no: EM131199572

Questions Cloud

How do you feel your recommendations will be viewed : If you find areas where policy revision is needed, how will you present your recommendations? How do you feel your recommendations will be viewed? Do you anticipate resistance? If so, what plan do you have to overcome that?

Differentiation and between broad and narrow market appeal : One of the big dangers in crafting a competitive strategy is that managers, torn between the pros and cons of the various generic strategies, will opt for " stuck in the middle" strategies that represent compromises between lower costs and greater di..

Pursuing a job opportunity that a friend told : What tools/methods do you anticipate using in your job search following your graduation? Have you run into remarkably good or bad experiences you'd like to share? (If so, keep thing anonymous!) How prepared would you feel in pursuing a job oppo..

Create a training proposal letter for a potential client : Pretend you are a business consultant selling your consultant business. Create a training proposal letter for a potential client that explains your professional services.

How the resolution of a shaft encoder could be improved : The peak level of light is received when the windows of the moving disk coincide with the windows of the masking disk.

Supplier of a high-end or low-end line of snow-blowers : Assume you are a procurement agent for Wal-Mart or you represent a potential supplier to the retailer selling high-end or low-end snow-blowers. You can decide if you are an agent/supplier of a high-end or low-end line of snow-blowers. Begin your post..

How current changes in federal and local policies influence : How might current changes in federal, state, and local policies influence decisions to be made? Include a schedule of assumptions for your proposal. What questions might the board ask regarding feasibility of this proposal?

Pursuing a job opportunity : What tools/methods do you anticipate using in your job search following your graduation? Have you run into remarkably good or bad experiences you'd like to share? (If so, keep thing anonymous!) How prepared would you feel in pursuing a job oppo..

Which is a part of the process of redesigning work : Which of the following is best classified as a polycentric policy of strategic approaches to international staffing? Which of the following is a part of the process of redesigning work?

User Account

All Pages