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Email this article Pengkondisi Sinyal RTD Presisi pada Terowongan Angin Indonesian Low-Speed Tunnel
(1) Departemen Teknik Elektro, Universitas Diponegoro; Laboratorium Aerodinamika, Aeroelastika, dan Aeroakustika, Badan Riset dan Inovasi Nasional (BRIN)
(2) Departemen Teknik Elektro, Universitas Diponegoro
(3) Laboratorium Aerodinamika, Aeroelastika, dan Aeroakustika, Badan Riset dan Inovasi Nasional (BRIN)
(4) Laboratorium Aerodinamika, Aeroelastika, dan Aeroakustika, Badan Riset dan Inovasi Nasional (BRIN)
Abstract
The temperature of the Indonesian Low-Speed Tunnel (ILST) wind tunnel test section was measured using a Pt100-type Resistance Temperature Detector (RTD) sensor. With the upgrade of the Indonesian Low-Speed Tunnel - Data Acquisition and Reduction System (ILST-DARS) using Ethernet communication, an integrated RTD linearization circuit was designed with the Conditioning Unit (CU) Mk3 to replace the Newport 267B 16-bit parallel and DAS-Hub as the current RTD interface. In this research, the design of the signal conditioner uses the RTD_Linearization_v7.xls program from Texas Instruments, the LTspice simulator software, and the AMP01E precision instrumentation amplifier. Based on the calibration results in the range of 20 – 50 0C, this signal conditioner has an average deviation value of 0.38 0C (1.31%). In the wind tunnel speed variation testing with a range of 30 – 65 m/s, the RTD signal conditioner had an average deviation of 0.41 K (0.14%). The Repeatability Test procedure was carried out at a wind speed of 65 m/s with an angle of attack for the test model from -90 to 200 and data were collected 10 times at each angle. The average deviation of temperature against variations in the angle of attack of the test model in this procedure is 0.25 K (0.08%) and the average deviation of wind speed against variations in the angle of attack of the test model is 0.03 m/s (0.04%).
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