分析液壓萬能試驗機誤差原因
下面分析一下在試驗結果中的誤差表現(xiàn)以及原因,共三點。
The analysis of the test results of error performance as well as the reason, a total of threepoints.
一、隨機誤差:即在相同的條件下,對同一參數(shù)反復停止屢次丈量,所得到的測定值也不可能完整相同。原因可能:在實驗過程中,試驗機內摩擦力的變化;環(huán)境濕度等的變化。
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、液壓系統(tǒng)誤差:堅持一定數(shù)值或者一定規(guī)律變化的誤差。系統(tǒng)誤差是有規(guī)律的,這種規(guī)律表現(xiàn)在每一次詳細的實驗中,找到這種規(guī)律,就能夠加以修正。
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:萬能試驗機示值不準,所測得的力值總是偏大或偏小。電阻應變儀丈量應變時,儀器面板上的系數(shù)的誤差。
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、差錯誤差:由于實驗工作中的錯誤,忽略大意等緣由惹起的誤差。這種誤差是沒有規(guī)律的,需求重復核對方可防止。
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:萬能試驗機操作錯誤,實驗人員看錯了數(shù)字,記載時寫錯了小數(shù)點位置等。
Reason: the universal testing machine operation error, the wrong number, records the wrongdecimal point.
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