Abstract: A microprocessor based device for monitoring a location and recording the time and date of each event involving the presence of an object such as a deer at the monitored location. A transmitter of an infrared beam may be mounted on a tree on one side of a trail in alignment with an infrared receiver mounted on a tree on the opposite side of the trail. When an object breaks the beam, the time and date of the event are recorded in memory, and the time and date of each event may be retrieved from memory and displayed in chronological order on an LCD display on the face panel of the receiver. Alternatively, a portable printer may be used to obtain a printed record of recorded events. Optionally, a camera may be aimed at the monitored location and automatically activated to photograph the animals present at the monitored location. The electronics incorporates various power conserving features to provide long life for the batteries so that extended operation is possible in remote areas.

Abstract: A multiple parameter doppler radar system transmits a radar signal which is alternated between a first and second frequency toward a target. The doppler shifted signals reflected from the target are received and processed to derive a pair of doppler signals related respectively to the first and second frequency signals. The frequency of one of the doppler signals is measured and scaled to a target speed. The phase magnitude between the two doppler signals is measured and scaled to a target range. The phase lead/lag relationship of the two doppler signals is detected to determine if the target is moving toward or away from the radar system. The components of the system are controlled by a microprocessor which is programmed to perform quality determinations on the data derived from the signals to assess the reliability of the data even in a multiple target environment prior to displaying the parameters of target motion.

Abstract: A special accessory for traffic radar devices includes two operating routines. These routines are to be used with a programmable microprocessor which comprises a portion of the traffic radar device. The routines are designated as a stopwatch routine and an interrupt routine. The stopwatch routine controls the overall operation of the speed computation within the programmable microprocessor of the traffic radar device while the interrupt request routine causes the microprocessor to perform as a precision clock capable of measuring elapsed time.