搜索结果: 1-5 共查到“农业机械学 measurement”相关记录5条 . 查询时间(0.047 秒)
ALT pedometer – a new sensor-aided measurement system for improvement in oestrus detection
oestrus detection pedometers sensors dairy cow
2014/2/26
Without sensor-aided animal data measuring systems far fewer oestrus cycles are recognized because cycle length, oestrus duration and oestrus intensity have developed negatively at high animal perform...
测量排气流量的内锥流量计数值模拟与实验（Numerical and Experimental Study on V-cone Flowmeter for the Vehicle Exhaust Gas Flow Measurement）
内锥流量计 流量测量 碳平衡法
2009/8/11
为了保证碳平衡法测量实车油耗的精度，对油耗测量系统中的内锥流量计进行了特性研究。用Fluent软件对内锥流量计进行了数值模拟，研究不同等效直径比、前后锥角、有无连接支撑杆等几何参数以及雷诺数对内锥流量计永久压力损失和流出系数的影响规律；将设计的两种内锥流量计与标准临界文丘里管组进行了对比验证实验，并以文丘里管实测值为参考值，得出了计算流出系数的拟合公式，将此拟合公式作为流量计算模型。结果表明数值模...
Measurement of potato tubers resistance against mechanical loading
potato mechanical njuries flesh darkening measurement methods tubers resistance
2014/2/27
The contribution presents a method for the determination of the potato tubers resistance against mechanical loading, the measurement results obtained with the selected potato varieties, and the compar...
Measurement of pressure in hydraulics system of the ZTS 160 45 tractor
tractor ploughing set pressure hydraulic pump three-point hitech
2014/2/28
This contribution is oriented on the field of dynamic loading analysis of three-point hitch of tractor hydraulic pump. The hydraulic pump is placed in circuit of three-point hitch of the tractor ZTS 1...
Comparison of two possibilities for mowing machine material feed rate measurement under laboratory conditions
mowing machines feed rate measurement accuracy
2014/2/28
The impact of materials and conditions (parameters) changes on mowing machine material feed rate measurement accuracy were measured under laboratory conditions. The influence of crop variety, crop mat...