scholarly journals Calculation of the components of the temperature measurement error by a resistance thermocouple of an installed unbalanced bridge

2021 ◽  
Vol 2094 (5) ◽  
pp. 052015
Author(s):  
A Leonov ◽  
N Zh Shkaruba ◽  
G N Temasova
Keyword(s):  
Measurement Error ◽  
Temperature Measurement ◽  
Supply Voltage ◽  
Voltage Drop ◽  
Measurement Range ◽  
Nonlinearity Error ◽  
Measuring Device ◽  
Unbalanced Bridge ◽  
Voltage Drops ◽  
Grain Drying

Abstract The article has devoted to solving an urgent problem related to the determination and calculation of the components of the temperature measurement error. A grain drying machine had selected as the object of research, in which the temperature of the grain at the exit from the machine is measured with the help of a Cu50 resistance thermocouple installed in an unbalanced bridge. It had found that the scale of the measuring device, calibrated in degrees Celsius, will have a nonlinearity error, which increases towards the end of the measurement range. For the Cu50 resistance thermocouple installed in the grain drying machine, when measuring the temperature in the range of 0 … 100 °C in absolute terms, the nonlinearity error was 0.3 mA, in relative terms - 4.4 %, which is quite large. The measurement error has calculated with a tolerance for the nominal resistance of the thermistor ± 0.1 Ohm, which in the given form was 0.5%. The resulting value indicates that this component will have an insignificant effect on the total measurement error. The measurement error due to the supply voltage drop by 0.2 V in relative form was 4.2 %. Thus, the voltage drops when using an unbalanced bridge will have a significant effect on the measurement result.

scholarly journals Analysis and research of methods of linearization of the transfer function of precision semiconductor temperature sensors

2020 ◽  
Vol 21 (4) ◽  
pp. 737-742
Author(s):  
O. V. Boyko ◽  
Z. Y. Hotra
Keyword(s):  
Measurement Error ◽  
Transfer Function ◽  
Temperature Measurement ◽  
Conversion Factor ◽  
Temperature Sensors ◽  
Nonlinearity Error ◽  
Temperature Measuring ◽  
Quadratic Component ◽  
Measuring Devices ◽  
Precision Temperature

The analysis of the nonlinearity of the transfer function of primary temperature transducers based on transistor structures has been performed. It’s shown that the quadratic component of the transfer function creates a significant nonlinearity error up to 0,2-0,6°C. We have developed methods of linearization based on both the formation of compensatory measuring current and change of the conversion factor of the output scaling amplifier at certain ranges of temperature measurement, which ensure their use in precision temperature measuring devices. The measurement error does not exceed 0.01°C in the range of 30-100°C.

scholarly journals Temperature Measurement at Curved Surfaces Using 3D Printed Planar Resistance Temperature Detectors

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1100
Author(s):  
Adam Steckiewicz ◽  
Kornelia Konopka ◽  
Agnieszka Choroszucho ◽  
Jacek Maciej Stankiewicz
Keyword(s):  
Temperature Measurement ◽  
Fused Deposition Modeling ◽  
Numerical Models ◽  
Elastic Base ◽  
Measuring Device ◽  
Fused Deposition ◽  
Influence Of Temperature On ◽  
Printed Sensors ◽  
Analytical Formulae ◽  
3D Printed

In this article, novel 3D printed sensors for temperature measurement are presented. A planar structure of the resistive element is made, utilizing paths of a conductive filament embedded in an elastic base. Both electrically conductive and flexible filaments are used simultaneously during the 3D printing procedure, to form a ready–to–use measuring device. Due to the achieved flexibility, the detectors may be used on curved and irregular surfaces, with no concern for their possible damage. The geometry and properties of the proposed resistance detectors are discussed, along with a printing procedure. Numerical models of considered sensors are characterized, and the calculated current distributions as well as equivalent resistances of the different structures are compared. Then, a nonlinear influence of temperature on the resistance is experimentally determined for the exemplary planar sensors. Based on these results, using first–order and hybrid linear–exponential approximations, the analytical formulae are derived. Additionally, the device to measure an average temperature from several measuring surfaces is considered. Since geometry of the sensor can be designed utilizing presented approach and printed by applying fused deposition modeling, the functional device can be customized to individual needs.

Research on and Applications of Au/Pt Thermocouples

2013 ◽  
Vol 483 ◽  
pp. 105-109
Author(s):  
Guo Chang Zhao ◽  
Chun Lei Zhao ◽  
Li Ping Song ◽  
Xian Yi Tong
Keyword(s):  
Temperature Measurement ◽  
Wide Spectrum ◽  
Measurement Range ◽  
Great Promise ◽  
Measuring Devices ◽  
Current State ◽  
High Temperature Measurement ◽  
Calibration Methods ◽  
Operational Life ◽  
The Us

Elemental thermocouples are capable of meeting the demanding requirements of high temperature measurement with high accuracy, wide temperature measurement range, and long operational life. With an ever increasing need for more accurate, more precise temperature measuring devices over a wide spectrum of temperatures, elemental thermocouples show great promise when compared with its counterparts. The Au/Pt thermocouple, one of the more effective elemental metal combinations, is the ideal standard thermometer in the range of 0°C - 1000°C due to its reproducibility, accuracy, stability, and durability, causing the US and Korea to standardize its use. Much academic work has been done on the accuracy, stability, thermoelectric properties, structural design, and calibration methods of Au/Pt thermocouples to develop it to its current state. This paper summarizes research done on Au/Pt thermocouples, both domestically and internationally, in order to provide a foundation for future improvement.

Analysis of Multi-Channel Virtual Temperature Measurement System Hardware Design and its Uncertainty

2012 ◽  
Vol 220-223 ◽  
pp. 1423-1426
Author(s):  
Ke Qin Liu ◽  
Xue Tao Pan ◽  
Jian Wen Cai
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Virtual Instrument ◽  
Measurement Range ◽  
Platinum Resistance ◽  
Total Uncertainty ◽  
Technical Parameters ◽  
Calculation Results ◽  
Virtual Temperature ◽  
Temperature Measurement System

According to a number of issues in the traditional temperature measurement, the multi-channel temperature measurement system based on virtual instrument is developed. In terms of measurement range and accuracy, Integrated Temperature Sensor TMP36, platinum resistance Pt100, and K-type thermocouple are selected to achieve multi-point temperature measurement, signal conditioning circuit is designed to match with every sensor. On this basis, combined with the technical parameters of each component, by means of the theory of uncertainty, analysis of the total uncertainty of system has been made. The calculation results show that the selection of each component for the temperature measurement system is reasonable, which can completely meet the measurement requirements.

Effect of Fouling on Temperature Measurement Error and a Solution

1998 ◽  
Vol 120 (2) ◽  
pp. 525-528 ◽  
Author(s):  
Y. I. Cho ◽  
B.-G. Choi
Keyword(s):  
Control System ◽  
Heat Exchanger ◽  
Measurement Error ◽  
Process Control ◽  
Temperature Measurement ◽  
Process Control System ◽  
Scale Layer ◽  
Automated Process Control System ◽  
Temperature Reading ◽  
Automated Process

The objective of the present study was to investigate the effect of fouling on the accuracy of temperature measurement. When a thin scale layer is deposited on a temperature-measuring probe, the temperature reading can be in error by several degrees in spite of ± 0.1 K resolution of the probe. This erroneous temperature reading can pose a serious problem in the evaluation of heat exchanger performance and in the operation of an automated process control system.

CMP dummy pattern insertion with reduction in power supply voltage drops

2004 ◽  
Author(s):  
Kiyohito Mukai ◽  
Junichi Shimada ◽  
Mitsumi Ito ◽  
Masanori Hirofuji ◽  
Hiroyuki Tsujikawa
Keyword(s):  
Power Supply ◽  
Supply Voltage ◽  
Power Supply Voltage ◽  
Voltage Drops
Sign in / Sign up

Export Citation Format

Share Document