Accession Number : AD0480094

Title :   INVESTIGATION OF INFRARED RADIATION FOR CHECKOUT PURPOSES.

Descriptive Note : Final technical rept. 21 Jan-21 Dec 65,

Corporate Author : RAYTHEON CO WAYLAND MASS SURFACE RADAR AND NAVIGATION OPERATION

Personal Author(s) : Vanzetti ,Ricardo ; Bobo ,Stephen N. ; Stoddard,James F.

Report Date : MAR 1966

Pagination or Media Count : 124

Abstract : A study was conducted in which the assumption that infrared techniques can be used to isolate faulty components in a circuit was unequivocally proved. The work consisted of a theoretical calculation of the probable thermal interactions which served to verify the experimental data obtained in the second half of the program. The experimental program consisted of a series of 35 experiments with a 9-component linear amplifier board; various departures from normal circuit operation were caused to occur by the systematic replacement of each component with a series of components having differing values. The data obtained from these experiments indicated that when a component of 1/4-watt nominal rating dissipates a minimum of 10 milliwatts, variations as small as 10% of value may be observed by a radiometer sensitive to approximately 0.25 C variation in temperature. The implications of this are that a radiometric fault isolation system having readily achievable specifications is now well within the state of the art. (Author)

Descriptors :   (*INFRARED DETECTORS, FAILURE(ELECTRONICS)), (*INFRARED RADIATION, FAILURE(ELECTRONICS)), (*RADIOMETERS, TEST EQUIPMENT), NONDESTRUCTIVE TESTING, CHECKOUT PROCEDURES, EMISSIVITY, REFLECTION, WAVE PROPAGATION, CIRCUITS, MATHEMATICAL ANALYSIS, CRYOGENICS, DISPLAY SYSTEMS, DIGITAL SYSTEMS, DETECTION, ELECTRONIC EQUIPMENT, ANALOG SYSTEMS, INFRARED SPECTRA, DATA PROCESSING, COPPER COMPOUNDS, MERCURY COMPOUNDS, GERMANIUM, ELECTRICAL CONDUCTIVITY, COMPUTER PROGRAMMING, DIGITAL COMPUTERS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE