Denoising MAX6675 reading using Kalman filter and factorial design

Septiana, Reski; Roihan, Ibnu; Koestoer, Raldi Artono

doi:10.11591/ijece.v11i5.pp3818-3827

Cited by 5 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in figure 5, the amplification of thermocouple's thermal potential is performed by the AD8422 type INA from Analog Devices Inc., denoted as IC1. For K-type thermocouple with its temperature varying in −20 • C-1000 • C, if the gain of INA is set to 100, the output signal V o would be ranged in ±5 V. According to (12), the value of gain controlling resistor R4 should be set as 200 Ω, thus the −3 dB bandwidth of INA is limited to about 120 kHz. R1, R2 with C1 are acted as differential mode RC filter, while R1, R2 with C2 and C3 are acted as common mode RC filter.…”

Section: Analog Front-endmentioning

confidence: 99%

See 1 more Smart Citation

Research on a dedicated thin-film thermocouple testing system for transient temperature measurement

Xie,

Cui,

Wang

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

The thin-film thermocouple (TFTC) is featured on small heat capacity and rapid response speed for transient temperature measurements under narrow space and difficult installation. Consequently, we propose a novel transient temperature testing system specifically designed for TFTC. This system features signal conditioning circuits with extended bandwidth and superior transfer speeds, a cold junction compensation method that supports customizable indexing tables, and an adaptive data filtering approach that precisely balances the smoothing of steady-state data with rapid responsiveness to transient data. This approach effectively mitigating the measurement distortion of transient temperature signals and the nonlinear phenomenon in cold junction compensation for TFTC. Utilizing NiCr/NiSi TFTC, we evaluated the system's accuracy, demonstrating a precision range of -0.5 to 0.25 °C within 20 - 100 °C, and a response delay under 0.1 ms. Compared to traditional thermocouple measurement systems, our system exhibits a finer time-domain resolution. Lastly, we successfully applied this system to observe the response of TFTC under the thermal load of short-pulse laser shocks, measuring a time constant of only 1.16 ms for the TFTC. This novel transient temperature testing system provides a new approach for TFTC to achieve online dynamic measurement and online calibration, and provides technical support for TFTC measurement technology towards engineering applications.

show abstract

Section: Analog Front-endmentioning

confidence: 99%

“…In practice, embedded controllers with single-IC signal conditioning devices are widely utilized [12,13]. These ICs are integrated with amplifier, A/D converter as well as digital interface, which is capable of connecting to TFTC and microcontrollers directly [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Research on a dedicated thin-film thermocouple testing system for transient temperature measurement

Xie,

Cui,

Wang

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…GELU is used to overcome dying node neurons with lighter computation than ELU, and the asymptotic behavior of GELU provides a more stable training process [19]. Simplification of equations for computational process efficiency and prevention of dying node neurons is also found in Leaky ReLU [20] as stated in (2) to (6).…”

Section: N: Number Of Samples In Batch Datamentioning

confidence: 99%

“…There are several approaches in minimizing the presence of noise in thermocouple sensor, one of them is applying the Kalman filter algorithm [6]. In fact, the process of implementing the Kalman filter is strongly depend on the system dynamic model which is set at the beginning and ineffective with the high variation data [7].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the accuracy of low-cost thermocouple devices through deep-wavelet neural network calibration

Julian,

Wahyuni,

Dewantara

et al. 2024

IJECE

View full text Add to dashboard Cite

Data collection using thermocouple sensors in low-cost data acquisition is prone to noise interference, which could reduce the data quality. Noise sources such as cold junction compensators, electromagnetic interference, and Johnson noise can significantly affect the reliability and accuracy of conventional measurements. This study aims to improve the quality of thermocouple sensor readings on low-cost data acquisition using calibration method based on deep learning and the denoising process using a wavelet transform. This taken approach successfully increase the accuracy value of 97.67% with a mean absolute error (MAE) of 0.2. The precision also increases of 262.7% as indicated by the result of signal-to-noise ratio (SNR) with a value of 105.29 dB. Comparative analysis was carried out against National Instruments® device and it was found that deep-wavelet method had a lower and higher of MAE and SNRdB values of 16.67% and 0.8% respectively. This study shows that the denoising-calibration method with deep-wavelet can improve the accuracy and reliability of data from low-cost thermocouple devices.

show abstract

“…During the assessment of these thin-film thermocouple sensors, the PC-based data acquisition systems are used to collect the amplified thermocouple temperature difference potential in order to explore the static and dynamic characteristics of the fabricated thin-film thermocouples [6], but these collecting system utilized above are lacked of flexibility and portability. Practically, for conciseness and integration, integrated thermocouple-to-digital converters are adopted commonly in microcontroller based measurement and control systems [7][8][9][10][11]. These device integrated the DC amplifier, cold-junction temperature sensor with compensating circuits, A/D converter with internal reference as well as the specialized digital interface.…”

Section: Introductionmentioning

confidence: 99%

Research of transient temperature measuring based on thin-film thermocouple and Wi-Fi wireless DAQ method

2023

View full text Add to dashboard Cite

The thin-film thermocouple temperature sensor is a new type of temperature sensor which was emerged with the development of thin-film materials. It features on a small heat capacity and a rapid response speed for transient temperature measurement on the surface of objects. The existing temperature data acquisition systems for filamentary thermocouples do not yet meet the conditions for distortion-free measurement of transient temperature signals in terms of sampling frequency and transmission rate. In addition, it is less flexible in terms of data transmission methods, while the cold end of the thermocouple compensation method has not yet compensated for the non-linear phenomenon of thermocouples, which affects the final measurement accuracy. This paper devised a wireless temperature data acquisition system for K-type thin-film thermocouples using a Wi-Fi wireless network to transmit sampling data, then applied the devised system as a data acquisition method to investigate the measurement of transient temperatures in conjunction with thin-film thermocouple sensors. The results of performance test indicated that the devised system is capable of transient temperature measurement of K-type thin-film thermocouples in the range of 0–650°C with a maximum sampling rate of 100 kHz, a temperature resolution of 0.16 degrees Celsius, an accuracy of 0.2% after non-linear compensation and the ability to measure transient temperature signals with a maximum frequency component of 25 kHz. Taken advantage of the devised wireless data acquisition system to measure the impulse response of a thin-film thermocouple sensor specimen, the meausured response curve is consistent with the law of first-order system, and the time constant of the sensor was obtained as approximately 1.16 ms. A comparison between the existing data acquisition apparatuses of type K thermocouple was made. The limitations of the devised system are also discussed.

show abstract

Denoising MAX6675 reading using Kalman filter and factorial design

Cited by 5 publications

References 28 publications

Research on a dedicated thin-film thermocouple testing system for transient temperature measurement

Research on a dedicated thin-film thermocouple testing system for transient temperature measurement

Enhancing the accuracy of low-cost thermocouple devices through deep-wavelet neural network calibration

Research of transient temperature measuring based on thin-film thermocouple and Wi-Fi wireless DAQ method

Contact Info

Product

Resources

About