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Related Concept Videos

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
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Updated: Oct 18, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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A Temperature-Compensation Technique for Improving Resolver Accuracy.

Wandee Petchmaneelumka1, Vanchai Riewruja1, Kanoknuch Songsuwankit1

  • 1School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand.

Sensors (Basel, Switzerland)
|September 28, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel temperature-compensation technique to enhance resolver accuracy. The method effectively minimizes signal errors caused by ambient temperature variations, improving measurement precision.

Keywords:
inductive transduceropampresolversubtract-and-sum circuittemperature-compensation technique

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Area of Science:

  • Electrical Engineering
  • Measurement Science

Background:

  • Resolver accuracy is significantly impacted by ambient temperature fluctuations.
  • Existing methods may struggle with wide temperature ranges or require specialized components.

Purpose of the Study:

  • To develop and validate a temperature-compensation technique for improving resolver accuracy.
  • To minimize signal errors in resolvers across varying ambient temperatures.

Main Methods:

  • A class-AB operational amplifier (opamp) drives the resolver's primary winding.
  • Resolver primary winding current is sensed via the opamp's supply current.
  • Temperature-induced errors are evaluated directly from opamp supply current measurements.

Main Results:

  • The proposed technique successfully minimizes resolver signal error from 1.463% to 0.017% at 70 °C.
  • Experimental validation confirms the technique's effectiveness with commercial devices.
  • The method demonstrates compensation for wide ambient temperature variations.

Conclusions:

  • The developed technique offers a robust solution for temperature-induced errors in resolvers.
  • This approach enhances measurement accuracy without requiring temperature-sensitive devices.
  • The findings support the practical application of this compensation method in various environments.