Full-automatic microphone testing machine

Abstract

The invention discloses a full-automatic microphone testing machine, comprising a mechanical feed system, a mechanical testing system, a mechanical sorting system, a polarity judgment module, a conversion amplifying module, an AD acquisition module and a PLC computing control module, wherein the mechanical testing system comprises a graduated turntable, a test probe and an auxiliary test unit. In the invention, the graduated turntable is adopted to carry out rotary accurate feeding and discharging control on a microphone; the test probe is combined with the auxiliary test unit together to carry out performance test on the microphone so as to acquire the performance information of the microphone product; the polarity judgment module, the conversion amplifying module, the AD acquisition module and the PLC computing control module are utilized to automatically judge, process and analyze the information so as to obtain the product features of each microphone; and finally the mechanical sorting system is used for sorting according to the product features so as to realize the automatic testing and sorting function of the microphone.

Description

technical field [0001] The invention relates to the technical field of testing equipment for electret microphones (microphones), in particular to a fully automatic microphone testing machine. Background technique [0002] At present, microphones (electret microphones) have been widely used in various electronic and digital products such as mp3, mp4, digital cameras, and telephones. With the advancement of technology and the continuous updating of needs, there are more and more types of microphones: one-way microphones, two-way microphones, anti-noise microphones, silicon crystal microphones, ultrasonic microphones, infrasound microphones, and standard microphones are too numerous to list. [0003] In the production process of microphones, the testing and sorting of microphones is one of the most important processes. At present, there are three test methods for microphone testing: manual testing with sensitivity tester; manual testing with Zhejiang University frequency sweepe...

AI Technical Summary

Problems solved by technology

This method has low work efficiency, high labor cost, and it is easy to introduce subjective errors of operators, which affects the overall quality and competitiveness of products.

The Zhejiang University frequency sweeper takes a long time to test and has high requirements for the test environment. It is only suitable for special product testing and laboratory measurement, and is not suitable for product batch inspection. At present, the automatic tester on the market is based on the Zhejiang University test system. Due to the frequency sweep method for measurement, the environment has a great influence on the measurement results, resulting in inaccurate measurement results; there are often missed and misjudged cases; at the same time, it is impossible to detect leaking products

In addition, the products detected by automatic testers in the existing market still need manual inspection, so they can no longer fully meet the increasing customer requirements and are not competitive in the market

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