目前,农机类传感器的生产,普遍采用标定的方法,趋向精度高,价格高;一般农机的受力设计要求不高,常根据试验和经验决定尺寸,这样的测力传感器不适应实际使用要求.针对这一问题.我们研制了两种测力传感器;传感器用理论公式测试,工艺简单.试验结果表明,精度符合要求,有推广价值.1 梁式测力传感器1.1 受力分析传感器的结构简图,电阻应变片的粘贴和连接电桥,如图1所示.梁为矩形载面,宽度相同,高度不同;为了加力,DE 段较其两边的高度大.设 AD 和 BE 段的轴惯性矩为 I_1,DE At present, the production of agricultural machinery sensors generally adopts the calibration method, with high tendency of precision and high price. The design requirements of general farm machinery are not high, and the size is often determined according to the experiment and experience. Such a load cell does not meet the actual requirements. In response to this problem, we developed two kinds of load cell, the sensor is tested with the theoretical formula, the process is simple, the test results show that the accuracy meets the requirements, and has the promotion value.1 beam load cell 1.1 structure of the force analysis sensor , The resistance strain gauge paste and connect the bridge, shown in Figure 1. The beam is a rectangular load surface, the same width and height are different; in order to force, DE segment than both sides of the height. Moment of I_1, DE