The invention is a rotating magnet Silver Circle appraiser, which provides an auxiliary tool for the appraisal of mechanism Silver Circle in the late Qing Dynasty of the Republic of China. In order to overcome the heavy weight, inconvenience to carry and easy to bump into the Silver Circle in the process of using the existing Silver Circle appraiser, the present invention applies the principle of eddy current. In the front part of the outer shell, an eddy current generator composed of a motor output shaft connected with a magnet is arranged, and a switch and a battery bin are arranged in the middle and rear part of the outer shell. Batteries are connected to motor electrodes by switches. The motor drives the magnet to rotate and generates a changing magnetic field, which acts on the identified silver circle, observes the force on the silver circle, and judges whether the silver circle is true or false. The magnet in the invention is enclosed in the outer shell, and does not bump into the Silver Circle in the process of identification. The weight of the magnet is one-tenth of that of the existing Silver Circle appraiser. The weight of the motor, battery and the outer shell is also far less than that of the existing Silver Circle appraiser, and the size is compact and easy to carry.
【技术实现步骤摘要】
旋转磁铁银圆鉴定器
本专利技术涉及一种为民国清末机制银圆的鉴定,提供参考依据的辅助工具,尤其是利用旋转磁铁产生的变化磁场来鉴定银圆的器具。
技术介绍
现在所谓的银圆鉴定器,其实就是用尺寸比较大的强磁铁,放在银圆表面,向上快速运动,产生变化磁场作用于银圆,看其受力翻滚程度,其分辨能力最多只能分辨出不动、微动、翻动和吸引四种状态,重量大携带不便,在使用过程中容易磕碰到银圆,造成不必要的损伤。
技术实现思路
为了克服现有银圆鉴定器重量大,携带不便,以及使用过程中容易磕碰到银圆。本专利技术应用电涡流原理,旋转磁铁产生变化的磁场,作用于被鉴定银圆,观察银圆受力情况,判断银圆真假。为实现上述目的,本专利技术所采取的技术方案:包括外壳、电池、开关、马达和磁铁,其机电特征在于:外壳前部中设置有,马达输出轴连接磁铁组成的电涡流发生器,外壳中后部,设置有开关与电池仓,电池通过电线和开关连接马达电极。磁铁可以是双极的,也可以是多级的。工作时,按下开关,马达通电,磁铁随马达输出轴一起旋转,形成不断变化的磁场,这时将磁铁接近银圆,银圆内部形成涡电流,受力被推动,就可以根据受力情况判断银圆真假。 ...
【技术保护点】
1.一种旋转磁铁银圆鉴定器,包括外壳(1)、磁铁(2)、马达(3)、开关(4)和电池仓(5),其特征在于:在外壳前部中,设置有马达轴连接磁铁组成的电涡流发生器,外壳中后部,设置有开关与电池仓。
【技术特征摘要】
1.一种旋转磁铁银圆鉴定器,包括外壳(1)、磁铁(2)、马达(3)、开关(4)和电池仓(5),其特征在于:在外壳前部中,设置有马达轴连接磁铁组成的电涡流发生器,外壳中后部,设置有开关与电池仓。2.根据权利1所述的旋转磁铁银圆鉴定器,其中,所述的磁铁可以是用多个尺寸较小的钕铁硼磁铁组成...
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