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stivali ugg Radiation Thermometry based on the pri

 
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PostWysłany: Śro 12:34, 08 Gru 2010    Temat postu: stivali ugg Radiation Thermometry based on the pri

Radiation Thermometry based on the principle of temperature monitoring and control system


SCM identifying Ea1, T/Ea2, T equal to E1, T/E2, T the absolute black body temperature corresponding to Tc (as measured brightness temperature of the body), the generation type (7), the microcontroller to calculate the corresponding the actual temperature of tube under test T, by the display. Meanwhile, the microcontroller power supply according to the temperature T controls the heating power, in order to achieve temperature control. In addition, the SCM system also controls the rotation speed modulation to control the sampling frequency. Figure 2 frequency power supply and temperature detection system 3 Conclusion 1) tube of ? more difficult to accurately obtained, such non-metal gray body tube, you can choose two wavelengths close to ? 1,[link widoczny dla zalogowanych],2 as the measurement wavelength, or 1 and 2 will be closer to the election,[link widoczny dla zalogowanych], such as taking 1 = 0.45t ~ m, 22 = 0.65m, so will that ? 1 ≈ ? from equation (7), T ≈ Tc, the temperature in real time, brightness temperature with the tube instead of the actual temperature, the resulting error term is. . III11I \. I made WDS using color pyrometer photoelectric detection system of the multi-point calibration, the result is 500 ~ 1000 ~ (2, and the relative error is ± 1%. 2) As the final output only two wavelength radiation on the ratio of relevant, so the measurement results and measurement of distance, surface area and shape of the tube has nothing to do radiation, and radiation transmission in the process of absorption and reflection of the media and part of the circuit sensitivity of the measurement system and its changes, operations and because the ratio of offset each other. 3) The method for induction heating technology to push the system variable wall thickness of pipe temperature detection and control of heating provides a practical and effective method. References [1] Pan Xinmin. Microcomputer sensor technology [M] Beijing: Posts & Telecom Press ,1988.54-60. [2] Lu Shao had. Introduction of modern computing [M]. Beijing: China Metrology Press ,1987.365-371. [3] Lu Xiao Yang, Lu Xiao-Li,[link widoczny dla zalogowanych], Shi Baojun. MF induction heating technology and experimental study of new pipe [J]. Shandong Institute of Architectural Engineering, 1991,6 (2) :57-63. [4] Lu Xiao Yang, Xu Bing industry , Lu Li, et al. Fuzzy Mathematics in the design parameters of bending tube heat application [J]. Plasticity Engineering, 1994,1 (4) :11-18. Data Acquisition System based on sound card to display their Jiang Shuai Feng Bao impassible ( Shanghai University of optical University, Shanghai 200093, China) Abstract This paper introduces the use of LabVIEW development system, in general a computer equipped with a sound card, sound card data acquisition to achieve the production points. The experimental results show that the system can correctly capture the audio range signal can be used as a general data collection. Key words data acquisition; sound card; LabVIEW0 data acquisition system is the introduction to a specific record of the real physical signals, for people to carry out further analysis of electronic systems. the general computer-based data acquisition system includes sensor (for non-power), signal conditioning,[link widoczny dla zalogowanych], data acquisition card and control software. which is the core component of data acquisition card, its sampling rate, sampling accuracy and number of channels directly affect the quality and quantity of data collection. the general commercial 12bit sampling accuracy, collection frequency of 200kHz data acquisition card to meet a variety of applications, but its expensive. In some applications, some of its features may not need. However, we observe today as long as any of a multimedia computer, will find, 16bit precision,[link widoczny dla zalogowanych], 44.1kHz sampling frequency of the sound card itself is a very high cost of data acquisition conversion card. According to sampling theorem, the maximum frequency of sound signal processing, in theory, only to 22kHz or so, but for low-frequency circuit analysis and testing, has been basically meet the requirements of individual performance is also better than the commercial data acquisition card, and its price of only a dozen commercial data acquisition card one. 1 sound card data acquisition system AB sound card hardware components such as the virtual instrument Figure 1: Figure 1 sound card present virtual instrument hardware chart are independent of the sound card or onboard sound with a dedicated chip, a sound card on the crystal, AD / death IA conversion chip and digital signal processing chip and other auxiliary circuits, so it can use as a data acquisition card. Now the sound card is generally used 32bit, 33MHz PCI bus interface clock frequency, the sound card to fully meet the highest sampling accuracy 16bit, 44.1kHz sampling frequency required 21 *

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