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目前,生产音响设备和扬声器件的工厂,在调试扬声器的流水线中,大多采用老式的拨盘式频率计。这种频率计需由熟练工人凭经验操作,操作时眼睛易疲劳。本文介绍一种成本低廉、硬件结构简单、使用方便、测试精确、显示迅速稳定的数字式频率测量装置。它既可作附件加装在原有老式的拨盘式频率仪中,也可以单独作一小型的频率测量装置,与振荡源配合使用作频率测量用。它可替代老式拨盘式频率计和一般的数字式频率计。本装置总体特点是:1.成本低廉,价格约140元,所用器件除了用8031作CPU外,其余集成电路芯片以及外围电路的价格均低廉,整个电路板体积小、重量轻。2.在20Hz～20kHz的音频范围内,能正确迅
At present, factories that produce audio equipment and speaker devices mostly use the old dial-type frequency meter in the debugging of speaker lines. This kind of frequency meter should be operated by experienced workers with experience, eye fatigue when operating. This article describes a low-cost, simple hardware structure, easy to use, accurate test, showing rapid and stable digital frequency measurement device. It can be used as an attachment to install in the old dial-type frequency instrument can also be a separate for a small frequency measurement device, used in conjunction with the oscillation source for frequency measurement purposes. It can replace the old dial-type frequency meter and the general digital frequency meter. The overall device features are: 1. Low cost, the price of about 140 yuan, the device used in addition to 8031 for the CPU, the other integrated circuit chips and low cost peripheral circuits, the entire circuit board small size and light weight. 2. In the 20Hz ~ 20kHz audio range, can be correct quickly