本文介绍了一种用于疲劳试验机的参数越限报警装置,它吸取了国内外同类装置的长处,具有精度高,控制准确、可靠,响应快,操作方便,全晶体管化,可长时间连续运行的特点,特别是对试样破损能进行报警,不受频率低和试验种类的限制,并能在变形和活塞位置控制下,用破损报警装置去控制试样的负荷值的变化范围,很适合用于低频和低循环疲劳验试用。本文最后提出了提高试样破损报警准确度的方向。 This paper introduces a parameter for the fatigue testing machine threshold alarm device, which draws the strengths of similar devices at home and abroad, with high precision, accurate control, reliable, fast response, easy operation, full transistor, continuous for a long time The characteristics of the operation, especially the damage to the sample can be alarm, not subject to the low frequency and the type of test, and in the deformation and piston position control, breakage alarm device to control the sample load range of changes, it is Suitable for low frequency and low cycle fatigue test. In the end, this paper proposes the direction of improving the accuracy of the sample damage alarm.