...including electronic circuits built into the traditional mechanical scales that use weights or weights for balancing, there are various types of scales ranging from small precision scales for scientific use (electrobalances, analytical electronic balances, top-pan electronic balances, etc.) to commercial scales (storefront electronic pan scales, electronic toll scales, electronic counting scales, electronic platform scales, etc.) to large industrial scales (load cell-type conveyor scales, crane scales, truck scales, etc.), and their accuracy is about the same as that of mechanical scales (1/10 5 to 1/10 3 of the weighing capacity). Figure 1 shows an electrobalance (weighing capacity in grams, sensitivity of 10 μg) that uses weights and electromagnetic force to balance the scale. The pan is hung from the force point and the weight point of a beam fixed to a movable coil similar to an ammeter, and the mass of the object is calculated by adding or subtracting the weight and the current in the movable coil so that the beam is horizontal. There are also automatic types (automatic balances) that automatically balance the beam and display the measurement results digitally. *Some terminology explanations that mention "electrobalance" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…従来の分銅やおもりでつり合わせる機械式はかりに電子回路を組み込んだものを含め,理化学用の精密小型ばかり(エレクトロバランス,分析用電子てんびん,上皿電子てんびんなど)から商業用はかり(店頭用の電子皿ばかり,電子料金ばかり,電子計数ばかり,電子台ばかりなど),工業用大型ばかり(ロードセル式のコンベヤばかり,クレーンばかり,トラックばかりなど)に至る各種のはかりがあり,これらの精度は機械式はかりと同程度(秤量の1/105~1/103)である。図1はてんびんのつり合せに分銅と電磁力とを併用したエレクトロバランスelectrobalance(秤量数g,感量10μg)で,皿は電流計に似た可動線輪に固定したさおの力点と重点とにつるされ,物体の質量は,分銅と可動線輪の電流とを加減してさおが水平になるようにし,このときの分銅の質量と電流の質量換算値との和から求める。さおのつり合せを自動的に行い,測定結果をディジタル表示する自動式のもの(自動てんびん)もある。… ※「electrobalance」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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