RANCANG BANGUN ALAT PENGUKUR FREKUENSI RESONANSI DAN CEPAT RAMBAT GELOMBANG PADA DAWAI MENGGUNAKAN SENSOR PICK UP MAGNETIK

F. Wardani, I. Sucahyo, M. Dewi
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Abstract

Abstrak Pengukuran frekuensi resonansi yang sesuai dengan hukum Marsenne dan cepat rambat gelombang dapat dilakukan menggunakan sonometer. Sonometer dapat diterapkan pada alat praktikum laboratorium instrumentasi. Metode pengukuran tersebut yaitu dawai dengan massa per satuan panjang sebesar 0,39; 0,78 dan 1,12 kg/m diletakkan di atas kayu sepanjang 80 cm secara bergantian yang diberi beban di ujung serta pengait di ujung lainnya dengan menambahkan komponen driver coil yang disambungkan dengan sumber input AFG (Audio Frequency Generator) dan dua bridge. Gelombang merambat melalui dawai dan dideteksi oleh sensor pick up magnetik yang disambungkan dengan osiloskop. Pengukuran frekuensi resonansi dilakukan dengan memanipulasi massa per satuan panjang dawai (0,39; 0,78 dan 1,12 kg/m) dan jarak antara driver coil dengan sensor pick up magnetik (0,39 dan 0,18 m). Ketiga manipulasi massa per satuan panjang dawai untuk jarak 0,3 m menghasilkan frekuensi 220,48; 264,20 dan 373,63 Hz serta untuk jarak 0,18 m menghasilkan frekuensi 36,75; 44,03 dan 62,27 Hz. Pengukuran tersebut membuktikan bahwa semakin pendek jarak maka didapatkan frekuensi resonansi yang semakin besar, sedangkan semakin kecil massa per satuan panjang pada dawai maka semakin besar frekuensi resonansi. Kedua hal tersebut sesuai dengan hukum marsenne. Pengukuran cepat rambat gelombang dilakukan dengan memanipulasi massa persatuan panjang dawai 0,39; 0,78 dan 1,12 kg/m. Ketiga manipulasi tersebut diperoleh 354,46; 250,64 dan 209,17 m/s. Oleh karena itu, dapat dijelaskan bahwa semakin kecil massa persatuan panjang dawai maka semakin cepat gelombang merambat.   Kata Kunci: Frekuensi resonansi, cepat rambat gelombang, sensor pick up magnetic, massa per satuan panjang, jarak antara driver coil dengan sensor pick up magnetik     Abstract Measurement of the resonant frequency in accordance with Marsenne's law and the propagation of the waves was carried out using a sonometer. Sonometer can be applied to laboratory instrumentation lab tools. The measurement method is a string with a mass per unit length of 0.39; 0.78 and 1.12 kg / m are placed on the wood along 80 cm alternately which is loaded at the end and the hook at the other end by adding a coil driver component connected to the AFG (Audio Frequency Generator) input source and two bridges. The waves propagate through the strings and are detected by a magnetic pick-up sensor connected to an oscilloscope. Resonant frequency measurements were performed by manipulating the mass per unit length of the string (0.39; 0.78 and 1.12 kg / m) and the distance between the driver coil and the magnetic pick-up sensor (0.39 and 0.18 m). The three manipulations of mass per unit length of string for a distance of 0.3 m yield a frequency of 220.48; 264.20 and 373.63 Hz and for a distance of 0.18 m the resulting frequency is 36.75; 44.03 and 62.27 Hz. These measurements prove that the shorter the distance, the greater the resonant frequency is obtained, while the smaller the mass per unit length of the string, the greater the resonant frequency. Both of these are in accordance with Marsenne's law. Measurement of the velocity of the wave propagation is done by manipulating the mass of the length of the string 0.39; 0.78 and 1.12 kg / m. The three manipulations were obtained 354.46; 250.64 and 209.17 m / s. Therefore, it can be explained that the smaller the united mass of the strings, the faster the waves propagate.   Keywords: Resonant frequency, wave velocity, magnetic pick up sensor, mass per unit length, distance between coil driver and magnetic pick up sensor
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兰仓建筑研究的频率和范围冲压成型磁拾取传感器
根据Marsenne定律和快速浏览波的谐振频率进行抽象测量。声波计可用于仪器实验室实验室使用。这种测量方法是用单位长度的质量为0.39的弦;0.78和1.12公斤/m轮流放在木杆上,一端加80厘米的负载,另一端加钩,再加上与AFG输入源(音频频率发生器)和两座桥连接的线圈部件。波长穿过线圈,被连接到示波器的磁镐传感器探测到。通过操纵质量以线性长度(0.39;驱动线圈与磁镐传感器之间的距离(0.39和0.18米;0.39至0.18英尺)264.20和373.63 Hz以及0.18米的距离产生频率36.75;44.03和62.27赫兹。这证明距离越短,共振频率就越大,弦上的单位长度的质量就越小,共振频率就越大。这两件事都符合马森尼定律。波浪冲量是通过操纵0.39长的弦的质量来进行的。78磅,1.12公斤/m。这三个操作得到354.46;250,64和209.17米/s。因此,可以解释的是,统一的质量越小,波长就越快。关键词:共振频率,快速浏览波,带有磁拾取的传感器的质量,长度单位的质量,驱动线圈与磁拾取的距离与马森尼定律的共振频率和波浪的传播是用声波计算的。超声波计可以应用于实验室器乐工具。测量方法是一组质量每单位0.39的弦;0.78和1.12公斤/ m安装在一根直径80厘米的木头上waves通过strings进行了宣传,并被一种磁诱发传感器连接到一个oscillope。重复的频率测量是通过操纵弦的质量表现出来的(0.39;司机线圈和磁盘传感器之间的距离(0.39和0.18米;0.3米)264.20和373.63 Hz, 0.18米的低回量是36.75;44.03和62.27赫兹。这些措施证明距离越短,质量越小,弦的质量就越小,共振的频率越高。这两个人都要遵守Marsenne的法律。对海浪宣传的速度的评估是通过操纵弦的质量0.39完成的;0.78和1.12公斤/ m.三种操纵被控制的354.46;例如,可以说明小马勒和他的团队的团结,更快的波浪宣传。键词:共振频率,波浪速度,磁选择传感器,质量单位单位,线圈驱动和磁选择传感器之间的距离
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