標準號：ASME Y32.18-1972
中文標準名稱：用于原理圖的機械元件和聲學元件符號
英文標準名稱：Symbols for Mechanical and Acoustical Elements as Used in Schematic Diagrams
標準類型：J04
發布日期：1972/1/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J04
國際標準分類號：01.080.30;17.140.01
適用范圍：1. Scope: This document presents standard symbols and definitions that may be used in constructing schematic diagrams for mechanical and acoustical systems whose performances are describable by finite sets of scalar variables. The choice of symbols described herein is based upon the following assumptions: a) A system can be divided conceptually into a finite set of elements each of whose dynamical properties are known. b) To each such conceptual element there can be assigned a set of terminals. c) Symbols for the elements shall be interconnected to form a schematic diagram for the whole system so that field equations shall be satisfied at every junction point and around every closed loop. The symbols which appear in this standard were evolved with the following principles in mind: a) It shall be possible to draw the symbols easily and quickly. b) The symbol shall be distinctive and where feasible shall suggest some well-known embodiment of the element in question. c) The symbols shall preferably have been used previously in the scientific literature. NOTE 1: Questions concerning the specific form for a so-called equivalent circuit of an electro-mechanical or any other type of mixed system are not within the scope of this standard. NOTE 2: An Appendix (not a part of this standard) provides background information on the use of the symbols in constructing schematic diagrams.