| Summary: | 碩士 === 南臺科技大學 === 電子工程系 === 104 === In this era of plenty precision instruments and manufacturing process advancement where controlling noise in measurement systems is vital, for various kinds of precision instruments are usually equipped with a specific anti-vibration device during operation. Otherwise, vibration in most laboratories, industrial environments and machine operation generates noise in all frequency range which can significantly affects on the measurement or production result. Typically, for receiving the vibration and acceleration signals, an anti-vibration system consists of sensors element and a sense circuit whereas not only detects signals generated from the physical vibration measurement, but also the noise from the sense circuit itself for various kinds of reasons. This study aims to achieve the performance improvement of Charge Amplifier in the vicinity of homemade Accelerometer inside Active Vibration Isolation, for the end purpose to eliminate the noise interference from power-line and to reduce the volume of Charge Amplifier in order to put on the sense circuit in the Accelerometer. Eventually, it integrates the Analog to Digital Converter (ADC) at the output terminal for analog-to-digital conversion. In addition, one of the major advantages in digital transmission of signals is its ability of noise tolerance and lesser interference by the physical effects inside the circuit. The cornerstone of this approach mainly figures out how to select the proper ADC for analog-to-digital conversion to digitalize output signal for computer to process the retrieved information.
In ther later chapters, we study the ADC which will be integrated to the output terminal of the accelerometer circuit. The Dynamic Element Matching Technique used in the SAR ADC can reduce the errors caused by element mismatches. The ADC integrated to the output terminal of the acceleromenter circuit will convert the signal to be processable by the backend comoputers.
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