Abstract: An apparatus and method for communication between patients and caregivers who speak different languages, or with speech deficient persons. A touch sensitive screen is provided to allow a patient to select responses to questions posed by care givers. A simple graphical user interface is provided which assists patients on respirators or otherwise unable to speak to communicate with hospital staff and family members. Combining thin profile LCD monitors with touch screen technology provides the user interface. In a preferred embodiment, a battery powered portable general purpose computer features a patient monitor on an adjustable articulated arm, and a second monitor for the care giver to view the patient's inputs and responses. Ideally, a roll-around hardware mounting configuration, with battery pack power, allows the system to be quickly moved and used in virtually any location.

Abstract: A traffic radar system is provided in which the speed of a target vehicle is determined by measuring the difference in frequency between a component of a doppler signal which has a frequency proportional to the relative speed of the target vehicle and a moving patrol vehicle and a reference signal having a frequency proportional to the speed of the patrol vehicle. The reference signal is developed from a tachometer device which generates a periodic signal having a frequency proportional to the rotational speed of a vehicle wheel and phase-locked loop arrangements including adjustable dividers are provided for locking an oscillator to the tachometer signal and generating a reference signal at a frequency proportional to the actual speed of the patrol vehicle. For calibration, a component of the doppler signal produced from reflections from stationary objects is used.