Electro Balance - Electro Balance

...The reading mechanism digitally displays the detection signal from the balancing mechanism, and has a wide variety of functions, such as a built-in microcomputer that can set the unit price of the item and display the price according to the weight of the item, a tare erase function that subtracts the weight of the container (tare) from the measurement result, and a printout of the measurement result. There are various types of scales, including those that incorporate electronic circuits into the traditional mechanical scales that are balanced with weights or weights, ranging from small precision scales for physicochemical use (electrobalances, analytical electronic balances, top-pan electronic balances, etc.) to commercial scales (storefront electronic plate scales, electronic fare scales, electronic counting scales, electronic platform scales, etc.) to large industrial scales (load cell 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 (capacity: several grams, sensitivity: 10 μg) that uses weights and electromagnetic force to balance the balance. The dish is hung from the force and weight points of a beam fixed to a movable coil similar to an ammeter. The mass of an object is calculated by adding the mass of the weight and the mass equivalent of the current by adjusting the weight and the current in the movable coil so that the beam is horizontal.

*Some of the terminology explanations that mention "electrobalance" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…読取機構には，つり合せ機構の検出信号をディジタル表示するほか，マイクロコンピューターを内蔵させ品物の単価をセットして品物の質量に応じた料金の表示，入れ物(風袋)の質量を測定の結果から差し引く風袋消去，測定結果のプリントアウトなど，多種多様の機能をもつものがある。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。…

※「エレクトロバランス」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