Signal processors

A device, such as a meter or computer, that displays the signal from the transducer in a form that is easily interpreted by the analyst. 

Historically, the first spectroscopic studies involved characterizing the emission of visible light from the sun, from flames, and from salts added to flames. Our survey of spectroscopy, however, begins with absorption because it is the more important technique in modern analytical spectroscopy. 

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Digital Signal Processor board fPSP) it is hosted into the PC and processes in real time the binary sequences stored into the acquisition board FIFO memories. The board processes arrival times and extracts the correlated AT generated by AE events. The PC picks up the data stored into the DSP memories and calculates the position of the AE sources. 

The data are transmitted from the front end processor to the computer in digital form over an ethemet link. The data consist of ultrasonic data, either raw RF A-scans or data processed by the digital signal processor in the PSP-4. In addition to the ultrasonic data, scanner coordinates are transmitted over the ethemet link. 

Fig. 11. Particle size analyzer based on ultrasonic spectroscopy where DSP = digital signal processor, and RS 232 is a standard serial connection that allows...

K. Kose, T. Haishi 1998, (Development of a flexible pulse programmer for MR] using a commercial digital signal processor board), in Spatially Resolved Magnetic Resonance, eds. P. Blunder, B. Blu-mich, R. Botto, E. Fukushima, Wiley-VCH. 

The IR detectors are usually connected to a controller that supplies power to the detectors and acts as a signal processor and output device. A typical controller monitors up to four detectors and energizes an output when any one of the detectors senses IR radiation that exceeds the alarm threshold level. The controller also contains the circuitry that checks the detectors and electrically supervises the interconnecting wiring to the explosive squibs or solenoid valves by trickling a small current through the external circuits. 

The mechanical movements taking place in this supramolecular system, in which a free molecule can be driven electrochemically to associate with either of two different receptors, opens the way to futuristic applications in the field of molecular-level signal processors.161 One can conceive second generation systems wherein the electrochemically driven... 

Image Sensors and Signal Processor for Digital Still Cameras,... 

Sensors, Signal Processors, Readouts, and Power Supplies... 

In general, an instrument consists of four components a sensor that converts a property of the solution into a weak electrical signal, a signal processor that amplifies or scales the signal and converts it to a useable form, a readout device that displays the signal for the analyst to see, and a power supply to provide the power to run these three components. The information flow within the instrument occurs with the movement of electrons, or electrical current. 

The signal processor is also measurement specific. A different mathematical treatment, such as a logarithmic conversion, is required for data from each kind of sensor, depending on what the operator desires as a readout. Some data treatment is often conducted with computer software. 

The readout device is a translator like the sensor. It translates the electrical signal produced by the signal processor to something the analyst can understand. This can be a number on a digital display, the position of a needle on a meter, a computer monitor display, etc. The readout device is not specific to the measurement. It can take the signal from any signal processor and display it. 

The power supply is also not measurement specific. Almost all sensors, signal processors, and readouts operate from similar voltages. The power supply converts the alternating current (ac) line power (or battery power) to voltage levels needed to operate the other functional elements of the instrument. See Figure 6.6 and Workplace Scene 6.1. 

Sensor, signal processor, power supply, and readout device. 

Identify and quantify Apply some signal processing procedure or algorithm to infer the in situ concentration of explosive molecules in the samples Signal processor... 

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