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影響試驗機精度和性能的因素

發布時間:2017-12-11 16:07:31   發布人:http://www.aiqin1.cn
一、試驗機的測控系統。目前市場上大部分拉力機的測控系統采用的是8位的單片機控制,采樣速率低,且抗干擾能力差,另外就是AD轉換器,如果AD轉換器的位數也就是分辨率低的話,那么測量也不會準。
1. The measurement and control system of the test machine. At present, most of the measurement and control system of the pull machine on the market is controlled by 8 bit microcontroller. The sampling rate is low, and the anti-interference ability is poor. In addition, the AD converter is also used. If the number of AD converters is low, then the measurement is not accurate.
二、試驗機的力值傳感器。因為傳感器的好壞決定了試驗機的精度和測力穩定性,目前市場上的拉力機用傳感器小力值一般用S型傳感器,大力值一般用輪輻式傳感器,傳感器內部一般為電阻應變片式,如果應變片精度不高或固定應變片用的膠抗老化能力不好在或者傳感器的材料不好都將影響傳感器的精度和使用壽命。
Two, the force value sensor of the test machine. Because the sensor determines the accuracy of the test machine and force stability, the current Rally machine on the market with a small force sensor value of S sensor is generally used, large value spoke sensor for general use, the sensor is generally resistance strain gage, if the accuracy is not high or fixed with plastic strain aging resistance not good or bad sensor materials will affect the precision and service life of the sensor.
三、試驗機的傳動系統。目前市場上的試驗機傳動系統有的采用減速機,有的采用普通皮帶,這兩種傳動方式的主要弊端:前種需要定期加潤滑油,后種則保證不了傳動的同步性影響試驗結果。
Three. The transmission system of the test machine. At present, some of the main disadvantages of the two transmission modes are the reducer used in the test machine transmission system, some ordinary belts, and the conventional ones. They need regular lubricating oil, and the latter can not guarantee the synchronicity of the transmission, which will affect the test results.
四、試驗機的驅動傳感器運動的部件滾珠絲桿。因為絲桿如果有間隙的話將來做出的試驗數據,將直接影響試驗的最大變形和斷后伸長率。
Four. The ball screw of the moving part of the test machine. Because the wire rod if the experimental data gap if future, will directly affect the deformation and elongation test.
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