Method and device for detecting deformation of printed circuit board

Abstract

The invention discloses a deformation detection method and device of a PCB. The characteristic that PDN inductance change causes ripple change of a power supply when the PCB is deformed is used, s loop oscillator is designed in a chip to detect the frequency offset, and PCB deformation is determined according to the frequency offset. Deformation detection can be carried out needless of a mechanical trigger or sensor, the design cost of PCB detection is reduced, and available space in the PCB is saved.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to a method and device for detecting deformation of a printed circuit board. Background technique [0002] With the advancement of electronic technology, more and more electronic products tend to be portable, lightweight, and intelligent, and users are paying more and more attention to the functions and service life of products. Among the many factors that affect the service life of electronic products, improper use by users often causes electronic products to be repeatedly impacted by external forces, which in turn leads to deformation of the structure and internal PCB. The consequences of repeated deformation of the PCB will affect the component solder joints on the PCB, Connecting wires and the like end up falling off or breaking, eventually damaging the electronics. [0003] A common way to detect PCB deformation is to use small pressure-triggered devices of mecha...

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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for detecting deformation of printed circuit boards, which are used to solve the problem that the current method for detecting deformation of PCB boards in the prior art requires additional time, which not only increases the cost, but also increases the cost of the PCB board. The problem of the spatial structure of

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