ANALOG SIGNAL INTEGRATION AND RECONSTRUCTION SYSTEM
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Abstract
TRANSIENT DATE SUCH AS THAT RELATING TO THE RADIANT ENERGY INCIDENT TO A SHOCK WAVE IN A GAS SHOCK TUBE IS CONVERTED TO AN ANALOG SIGNAL AND DISPLAYED ON THE SCREEN OF AN OSCILLOSCOPE. A VIDEO SCANNING MEANS SCANS THE AMPLITUDE AXIS OF THE DISPLAYED SIGNAL AT PREDETERMINED INTERVALS ALONG THE TIME AXIS OF THE SIGNAL AND GENERATES A FIRST INDICIA WHEN EACH SCAN IS INITIATED AND A SECOND INDICIA WHEN THE SCAN INTERSECTS THE DISPLAYED SIGNAL. A COUNTING MEANS INITIATES A COUNT IN RESPONSE TO THE FIRST INDICIA OF EACH SCAN AND TERMINATES THE COUNT WHEN THE SECOND INDICIA IS GENERATED. DURING THE INTERVAL BETWEEN SCANS THE DATA IN THE COUNTING MEANS, A DIGITAL REPRESENTATION OF THE AMPLITUDE OF THE DISPLAYED SIGNAL AT THE POSITION OF THE SCAN, IS SHIFTED INTO A COMPUTER MEMORY FOR STORAGE. THE STORED DIGITAL DATA MAY BE USED EITHER TO CALCULATE THE AREA BENEATH THE DISPLAYED WAVEFORM OR FOR SUBSEQUENT RECONSTRUCTION THEREOF.
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