Inductor detecting instrument and method

Abstract

The embodiment of the invention discloses an inductor detecting instrument and an inductor detecting method which are used for detecting a plane inductor. The inductor detecting instrument provided by the embodiment of the invention comprises a radio frequency module and a frequency comparing module, wherein the radio frequency module comprises an inductor and a radio frequency generator; the volume of the inductor is matched with the size of a through hole in a plane inductor on a to-be-measured printed circuit board (PCB); the radio frequency generator is used for outputting a corresponding radio frequency signal according to inductance volume output of the inductor; and the frequency comparing module is used for comparing the frequency of the radio frequency signal outputted by the radio frequency generator with a reference frequency and prompting the plane inductor short circuit when a difference value between the frequency of the radio frequency signal and the reference frequency exceeds a threshold value. The embodiment of the invention also provides the inductor detecting method. According to the inductor detecting method provided by the embodiment of the invention, the plane inductor can be quickly and accurately detected.

Description

technical field [0001] The invention relates to the field of circuit detection, in particular to an inductance detector and an inductance detection method. Background technique [0002] With the rapid development of semiconductor manufacturing technology, the integration level of integrated circuit (IC, Integrated Circuit) devices increases rapidly. In order to improve the stability of product performance and save costs, most high-end printed circuit boards (PCB, Printed Circuit Board) now make air-core inductors with small inductance into PCB planar inductors and print them directly on the circuit board. [0003] This PCB mosquito-repellent coil-shaped inductor design has become an industry development trend, but this design also puts forward higher requirements for PCB manufacturers, so short-circuit detection of the inductor before PCB shipment has become an essential step. [0004] In the prior art, there is an inductor short-circuit detection method, which mainly uses ...

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Problems solved by technology

[0006] However, this solution in the prior art needs to connect the inductance L to the circuit to realize the detection, that is to say, the inductance detection instrument and the inductance L must be electrically connected. However, for the PCB mosquito-repellent coil design, the planar inductance has been printed into In the PCB, it is obviously not suitable to electrically connect the inductance detection instrument with the inductance, so the solution in the prior art is only suitable for three-dimensional inductance, not for PCB planar inductance

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