Instrumentation (AMME2700) 1 Instrumentation Dr. Xiaofeng Wu.

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Presentation transcript:

Instrumentation (AMME2700) 1 Instrumentation Dr. Xiaofeng Wu

Instrumentation (AMME2700) Sampling Rate

Instrumentation (AMME2700) Digital to Analogue Converter: Binary Weighted Resistors R f = R 8R4R2RR VoVo -V REF LSB MSB

Instrumentation (AMME2700) Digital to Analogue Converter

Instrumentation (AMME2700) Analogue to Digital Converter

Instrumentation (AMME2700) Bits and Words

Instrumentation (AMME2700) Decimal and Binary Data Conversion Example1: Example 2: Sign bit Integerfractional

Instrumentation (AMME2700) Resolution and Quantization Error

Instrumentation (AMME2700) Example  Compute the quantization error for 100mV and 1V analogue signal input using 8-bit and 12-bit A/D converter, both having a full scale range of 0 to 10V. The load cell can measure from 0 to1kg, with a voltage output from 0 to 10mV. If the precision is 1g, please determine the gain needed using 8-bit and 12-bit A/D converter.