分析液压万能试验机误差原因
下面分析一下在试验结果中的误差表现以及原因,共三点。
The analysis of the test results of error performance as well as the reason, a total of threepoints.
一、随机误差:即在相同的条件下,对同一参数反复停止屡次丈量,所得到的测定值也不可能完整相同。原因可能:在实验过程中,试验机内摩擦力的变化;环境湿度等的变化。
A: namely, the random error in the same conditions, the same parameters repeatedlyrepeatedly measured, the measured values cannot be completely the same. Reason: in the course of the experiment, the change of internal friction test machine; change of environment humidity etc..
二、液压系统误差:坚持一定数值或者一定规律变化的误差。系统误差是有规律的,这种规律表现在每一次详细的实验中,找到这种规律,就能够加以修正。
Two, the hydraulic system error: error to change certain numerical or certain laws. System error is the law, the law in every detail in the experiment, found the law, can be modified.
原因:万能试验机示值不准,所测得的力值总是偏大或偏小。电阻应变仪丈量应变时,仪器面板上的系数的误差。
Reason: the value not shown universal testing machine, the measured force value is too large or too small. Resistance strain gauge measuring strain, error coefficient on the instrument panel.
三、差错误差:由于实验工作中的错误,忽略大意等缘由惹起的误差。这种误差是没有规律的,需求重复核对方可防止。
Three, the error error: due to experimental errors in the work, ignore the error effect etc. the cause. This error is not regular, repeating each other can prevent nuclear demand.
原因:万能试验机操作错误,实验人员看错了数字,记载时写错了小数点位置等。
Reason: the universal testing machine operation error, the wrong number, records the wrongdecimal point.
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