초록 ▼

An impact detector for use with a grain loss monitor of a harvesting machine includes a damped detector plate member and a transducer associated with a surface of said detector plate member. The detector plate member is provided with signal damping means only around its periphery, whereby a substant

An impact detector for use with a grain loss monitor of a harvesting machine includes a damped detector plate member and a transducer associated with a surface of said detector plate member. The detector plate member is provided with signal damping means only around its periphery, whereby a substantial area of the detector plate member is delimited which is void of any signal damping means.

대표청구항 ▼

In an impact detector for use with a grain loss monitor and including a damped detector plate member having a high signal conductivity and a transducer associated with a surface of the detector plate member, the improvement comprising: the detector plate member is provided with signal damping means

In an impact detector for use with a grain loss monitor and including a damped detector plate member having a high signal conductivity and a transducer associated with a surface of the detector plate member, the improvement comprising: the detector plate member is provided with signal damping means substantially around the periphery thereof delimiting a substantial area thereof which is void of any signal damping means, said signal damping means being capable of damping signal echoes within the detector plate member at the outer edges thereof, said detector plate member being an elongated metallic plate of generally U-shaped cross-section having limbs provided with said signal damping means on the inner surfaces thereof and with further damping means being provided on each of the two opposed surfaces of the detector plate member at the respective opposite ends thereof.