Steady-state thermography is limited to detecting hot spots that heat up at least mK 0. This may be useful for locating shorts on high-power devices, but is inadequate for detecting lower power defects such as leakage current or hot spots in packaged devices.
Steady-state thermography also suffers from poor spatial resolution as the heat from localized hot spots diffuses rapidly, blurring the location of the heat source. Lock-in thermography is a process of automatically and repeatedly powering a device at regular intervals using a laboratory power supply and reed relays while the temperature response of the device is integrated and analyzed over time.
Over many power cycles, the sum of thermal images captured while the device is unpowered are subtracted from the sum of thermal images captured while the device is powered. Increasing the number of test cycles results in improved test sensitivity. Using this technique, hot spots that heat up less than 1mK 0.
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Sign me up for the newsletter! Published Date : Jan 05, Category : Top 10 Windows. Table of Contents show. Folder Lock. Gilisoft File Lock Pro. Instant Lock. Secret Disk. Folder Guard. Iobit Protected Folder. Folder Locker Pro. With a few rules in place, lock-ins can be avoided—and agility, the most important characteristic of IT excellence, can be affixed instead. DevPro Journal. Home Professional Growth.
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