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Fundamentals of Data Acquisition
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From VTI Instruments Corporation
Data acquisition systems make various types of physical measurements, such as temperature, pressure, flow, strain, position, and speed, using electronic equipment. The data collected is usually sent to a computer for analysis and display. Data acquisition and control (DAC) systems also take action (control) based on the data they receive. Turning on or off lights, motors, valves, heaters, and fans are common functions of control. Sending out voltage, current, digital words, pulses, and waveforms are also forms of control from the DAC system. DAC software running in the computer coordinates and executes these functions. (Figure 1) Products & Services
Digital-to-analog converters (DAC) transform a digital number into a corresponding analog voltage or current.
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Data acquisition is the digitizing and processing of multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. Signal conditioning includes the amplification, filtering, converting, and other processes required to make sensor output suitable for rereading by computer boards.
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Signal conditioning products provide amplification, filtering, converting, and other processes required to make sensor output suitable for reading by computer boards.
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Frequency-to-voltage converters accept a signal and convert its frequency to a corresponding analog voltage level.
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Counter and timer boards are computer cards that perform digital counting and/or timing functions.
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Topics of Interest
Each Series high-voltage power supply (HVPS) is a remotely programmable constant-voltage HVPS offering output voltage from 0VDC up to the maximum rating of each particular unit in the series. All...
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The power supply is a vital but often neglected part of any electronic product. It is the interface between the noisy, variable and ill-defined power source from the outside world and the hopefully...
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Often, there may arise the need to apply an AC PWM drive1 to input voltages such as 200, 208, 380, 415 and possibly other levels, as well as input frequencies such as 50 Hz. The AC PWM regulator...
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As described in Chapter 3, all DC/AC pulse-width-modulation (PWM) inverters are treated as a first-order-hold (FOH) element in digital control systems. We will discuss this model in various circuits...
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UltraVolt's high-voltage power supplies (HVPSs) have an output-current monitor (Iout Monitor), which allows the total output current of the HV multiplier to be monitored. Note, since the sense circuit...
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