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 Posted: Wed 17:57, 08 Dec 2010 Post subject: stivali ugg Feeding equipment in the Combined Bala |
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Feeding equipment in the Combined Balance Performance and Control
0V AC through the half-wave rectifier diode D3 into AC synchronous signal, after losing to compare the foot of 1,2 J2 detection and optical pulse signal generated across the interface circuit input computer, computer from the rising edge of the beginning of time t after the 4,5 by J2 pin output control voltage optocoupler u control by thyristor, making the coil feeder supply voltage waveform shown in Figure 3 (b) below. As the AC cycle D is 20ms, half-wave lOres, so the adjustment range of t 0 ~ lOms between. Electromagnetic vibration feeder coil power supply in a certain time (ie, the number of cycles D) in, t1 bigger, f waveform width smaller,[link widoczny dla zalogowanych], the smaller the effective voltage, electromagnetic vibrating feeder exciting force smaller, more to the feeding amount less; the other hand, t smaller, electromagnetic vibrating feeder higher excitation force,[link widoczny dla zalogowanych], to the feeding amount more. 5 \on the scale of the impact of combination feeding of feed material per unit weight distribution of the various factors and control methods have a certain understanding for the establishment of an appropriate model portfolio ready to improve the accuracy of weighing the amount of DA portfolio:: and speed are important for producers and consumers will undoubtedly have a very large economic and social benefits. References [1] Au Wai Fong. bucket electromagnetic vibration feeder in the law of relative motion of objects [J] . Jiangxi Agricultural University, 1994 (6) :194-201 [2] Xi-Liang, Lu Yan. Electromagnetic Vibration Feeder working characteristics and applications [J]. Agricultural Machinery,[link widoczny dla zalogowanych], 2003 (9) :92-95 [3 ] Qin was brilliant editor. Electrotechnics (} Volume) [M]. Beijing: Higher Education Press, 1999 [4] Wang Shaoxia, high just China. seed quantitative electronic scale electromagnetic vibration transmission to the material principle and application [J]. Agricultural Machinery, 1998 (29) :139-145 [5] Xi-Liang,[link widoczny dla zalogowanych], Li Pingping. Electromagnetic Vibration Feeder control and application of number 7 [J]. Agricultural Machinery, 2004 (1) :100-103 [6] results Xinhua, Xinzhong Li . electromagnetic scale electrical vibration feeding the electrical control system [J]. Industrial Measurement, 1999 (S1) :310-312 phase-locked amplification technology based on research and development of optical fiber gas meter Wenyan Li Wei (Wuhan University, Wuhan 430070) (Measurement and Testing Technology Research Institute of Hubei Province, Wuhan 430071) summarized the optical fiber sensing technology based on phase-locked meter system structure and working principle, mainly through the use of fluorescence quenching detection of fluorescence excitation light generated between the phase difference to achieve the phase-locked synchronous fluorescence measurement and monitoring technology for detection of coherent signal processing to the two most of the analysis, processing, verify the operation of optical fiber gas meter. Key words fiber gas meter; fluorescence quenching; lock 0 Introduction 1 phase detection meter optical sensing elements and fiber optic gas sensor working principle of the rapid development in recent years a new type of gas sensor, it is through changes in optical signals to achieve the detection of the gas, which is characterized by safety, for explosive and harsh environments of gas measurement, gas sensors become the main direction of development. A typical optical fiber sensor is a light source, optical fiber, composed of sensitive components and optical detectors, fiber-optic sensing of jobs the main principle is the use of fluorescent material, scattering, absorption and refractive index changes to reflect the characteristics of the gas composition. The basic principle is shown in Figure 1. Figure 1 Basic schematic optical fiber gas sensor gas meter is the specific wavelength of light emission and specific incentives for optical coupling into the signal fiber, transferred to a fixed sensor,[link widoczny dla zalogowanych], the measured gas sensor under the optical signal change, thus changing the state of the optical signal transmission, which changes the optical signal under test a quantitative relationship between changes in the gas, which reflects changes in the gas under test. transmission status change signal feedback coupled into the fiber optic light transmission to light detector. the amount of TH: 11.1 meter optical fiber composed of optical fiber gas sensing Min meter block diagram shown in Figure 2. Figure 2 Block diagram of 1.2 meter optical fiber gas sensor gas meter called the signal sensing part of the working principle of fluorescence quenching refers to the material between solute molecules and the result decreased fluorescence intensity of the physical or chemical processes. interact with the fluorescent material strength decrease caused by substances called material quencher, quenching process is actually competing with the light emitting elements so as to shorten the process of excited state lifetime . fiber gas meter is based on the measured gas and the occurrence of the immobilized reagents directly 19 *
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