Topic
Decade box
About: Decade box is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 15 citations. The topic is also known as: decadebox.
Papers
TL;DR: The proposed circuit is able to accurately measure material resistance that can be further related to material properties, and it was found that, contrary to the decade box analysis, Vi affects the resistance value due tomaterial properties.
Abstract: Material resistance is important since different physicochemical properties can be extracted from it. This work describes a novel resistance measurement method valid for a wide range of resistance values up to 100 GΩ at a low powered, small sized, digitally controlled and wireless communicated device. The analog and digital circuits of the design are described, analysing the main error sources affecting the accuracy. Accuracy and extended uncertainty are obtained for a pattern decade box, showing a maximum of 1 % accuracy for temperatures below 30 ∘ C in the range from 1 MΩ to 100 GΩ. Thermal analysis showed stability up to 50 ∘ C for values below 10 GΩ and systematic deviations for higher values. Power supply V i applied to the measurement probes is also analysed, showing no differences in case of the pattern decade box, except for resistance values above 10 GΩ and temperatures above 35 ∘ C. To evaluate the circuit behaviour under fiber materials, an 11-day drying process in timber from four species (Oregon pine-Pseudotsuga menziesii, cedar-Cedrus atlantica, ash-Fraxinus excelsior, chestnut-Castanea sativa) was monitored. Results show that the circuit, as expected, provides different resistance values (they need individual conversion curves) for different species and the same ambient conditions. Additionally, it was found that, contrary to the decade box analysis, V i affects the resistance value due to material properties. In summary, the proposed circuit is able to accurately measure material resistance that can be further related to material properties.
12 citations
Patent•
24 Jan 1979
TL;DR: The two-digit resistance decade box as mentioned in this paper is a new design of resistor decade box that offers two digit setting accuracy, ease-of-setting, and improved economy of components.
Abstract: The device of this disclosure, hereafter referred to as a "two digit resistance decade box," is a new design of resistance decade box that offers two digit setting accuracy, ease of setting, and improved economy of components. The specifications include a comparison of performance and fabrication economy with the simple resistor substitution box and the conventional resistance decade box. A circuit diagram of the device is presented and explained.
7 citations
Dissertation•
11 Sep 2017
TL;DR: In this article, a digital oscilloscope was used to calculate mathematical values for each sinusoidal, rectangular and triangular wave form in the RC charging circuit and RC discharging circuit, along with a DC source, a measurement instrument, a capacitance and a resistance decade box.
Abstract: Every periodic function 𝑦(𝑡) can be represented through a Fourier series as the sum of the sine and cosine waves, whose frequencies are the integer multiples of the basic frequency. Prior to conducting laboratory measuring, it was necessary to calculate mathematical values for each sinusoidal, rectangular and triangular wave form. All measurements in the laboratory were performed by a digital oscilloscope, which significantly differs from the analogue oscilloscope. For RC charging circuit and RC discharging circuit are, along with an oscilloscope, used a DC source, a measurement instrument, a capacitance and a resistance decade box. All the results were saved to the computer and processed using Microsoft Excel
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 2016 | 1 |
| 1979 | 1 |