Spreader application rate monitoring device

摘要

An application monitoring device to determine and display the volume of liquid or granular material applied per unit area of ground by mobile application equipment is described. The device includes a first measuring means which generates an area electrical pulse signal having a frequency proportional to the rate at which the application equipment covers or traverses a unit of area, and a second measuring means which generates a volume electrical pulse signal having a frequency proportional to the rate of application of the material. A frequency multiplying means operates on the electrical a pulse signal of the first measuring means, and a pulse counting device connected to the output of the frequency multiplying means and the second measuring means accumulates the electrical pulses from the second measuring means for a period of time determined by the frequency multiplying means and corresponding to the time required by said application equipment to cover a unit of area. Display means indicate the above accumulated value of pulses which is a measure of the volume of material applied per unit area.