论文部分内容阅读
目前我国常用的三等标准测力计分压式和拉式两种,虽然还有一种所谓拉压式测力计(见图1),但由于拉力和压力共同使用时示值不稳定度往往超差,影响测力计的精度,因此一般只能按其中一种使用(用作拉力就不用压力,用作压力就不用拉力)。而且在《三等标准测力计检定规程》(JJG144—73)中第11条规定:“……将拉(压)力定度改为压(拉)力定度的测力计,需要进行两次定度,两次定度
At present, China’s third-class standard dynamometer partial pressure and pull two, although there is a so-called tension and compression dynamometer (see Figure 1), but due to the tension and pressure when used together instability is often Out of tolerance, affecting the accuracy of the dynamometer, it is generally only one of the use of (as a pressure on the pressure will not have to use pressure). Moreover, Article 11 of the “Third Class Standard Dynamometer Verification Regulation” (JJG144-73) stipulates: "... a dynamometer that changes the tension (tension) force to the pressure (pull) force rating needs to be carried out Twice, twice