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生产成套音叉需要对音叉频率进行校准测试,通常用示波器测量频率的方法有半波数法、李沙育图形法、亮度调制法、齿轮形法、圆拂掠法和插入法等。这些方法或是读数精度不够,或是测量数值不连续,或是操作太繁,不便于大批量测试。本文提出的仪器及椭圆振动周期法可方便地校测音叉频率,特别是在充许公差内进行快速测定频率尤为方便。校测方案校测方案是采用比较法,将被测音叉频率与标准器频率相比较,由示波器所示图形查看是否一致(图1)。此方案的优点是简单易行,但需用一标准频率,可是一般音频
The production of complete tuning fork requires tuning fork frequency calibration test, usually with the oscilloscope to measure the frequency of half-wave number method, Lissajous figure method, brightness modulation method, gear-shaped method, round brushing method and insertion method. These methods are either not accurate enough in readings, discontinuous in measured values, or too cumbersome to test in large batches. The instrument proposed in this paper and the elliptical vibration period method can be easily calibrated tuning fork frequency, especially within the allowable tolerance for rapid determination of frequency is particularly convenient. Calibration program Calibration program is the use of comparison method, the measured tuning fork frequency and standard frequency compared to the oscilloscope shown graph to see whether the same (Figure 1). The advantage of this scheme is that it is simple and convenient, but needs a standard frequency, but the general audio frequency