Device and method for adjusting a signal for an object detector

A method of adjusting a signal for an object sensing device to account for a level of noise in the signal to improve an object counting accuracy, the method comprising:

• receiving, by a controller coupled to a plurality of electromagnetic radiation detectors, a radiation intensity signal corresponding to an intensity of electromagnetic radiation received by the plurality of radiation detectors;
• determining, by the controller, that a value of the radiation intensity signal is within a voltage threshold, thereby indicating that no seed is passing through the electromagnetic radiation received by the plurality of radiation detectors;
• determining, by the controller, a derivative of the radiation intensity signal;
• determining, by the controller, that the derivative of the radiation intensity signal is less than a derivative threshold level for at least a predefined elapsed time;
• and
• in response to determining that the value of the radiation intensity signal is within the voltage threshold and that the derivative of the radiation intensity signal is less than the derivative threshold level for at least the predefined elapsed time:
• updating a base noise floor value to be the value of the radiation intensity signal.