指针式仪表品种规格繁多,然而国内外对这类仪表的主要检定项目——示值精度检定(包括示值调整及成品出厂检定)仍长期停留在依靠人的视力来检定的落后状态。用传统方法检定指针式仪表时,首先由基准仪器(或检具)给出一系列基准量(如基准位移、基准压力等),然后按被检仪表指针偏离正确刻度的多少读出仪表各对应点的示值误差。这种检定方法存在两大问题:首先是工人必须不断用目测来取得一系列基准量,读出仪表在各对应点的示值误差,所以劳动强度大,工人视力极易疲劳。其次 However, at home and abroad, the main verification items of this kind of instruments, such as indication accuracy verification (including indication adjustment and finished product verification), still lag behind in the backward state which depends on human vision for a long time. The traditional method of verification pointer instrument, first of all, by the reference instrument (or gage) given a series of reference amounts (such as the reference displacement, the reference pressure, etc.), and then measured instrument pointer deviate from the correct scale how many read the corresponding instrument The point of indication error. There are two major problems with this verification method. First, workers must constantly use visual inspection to obtain a series of datum readings, so as to read the indication error of the instrument at each corresponding point. Therefore, the labor intensity is high, and the visual acuity of workers is extremely easy to fatigue. Second