In order to study the influence of sensitive beam structure parameters of grain flow sensor on yield measurement precision

a series of novel experiments are designed and implemented.Experiments result shows that: under the impact load

the bending stiffness of A-type structure（short hole spacing sensitive beam structure）load cell is 62 % higher than that of B-type structure（long hole spacing sensitive beam structure）

and the response frequency is higher

but the response frequency is inversely proportional to its load.At the same time

under the same impact load

the output signal of A-type structure is about 10 % larger than that of B-type structure

but it is easier to produce zero point drift

which is also increased by 35 %.Through the experiment and theoretical analysis

it is considered that the sensor with A-type structure is more suitable to be used as an impulse grain flow sensor.