초록 ▼

A portable, microprocessor-based data collection unit can be plugged directly into traffic detectors for recording event data, such as traffic volume, disconnected from the traffic detector without loss of data, and then plugged directly into a personal computer to unload the data, communicating via

A portable, microprocessor-based data collection unit can be plugged directly into traffic detectors for recording event data, such as traffic volume, disconnected from the traffic detector without loss of data, and then plugged directly into a personal computer to unload the data, communicating via a serial communications cable without any additional interface device or reader. Developed with retrofitting in mind, with its own microprocessor, and battery-powered real-time clock and data storage all interconnected in one circuit, the data collection unit can use existing air switches/loop detectors and power supplies of prior traffic counters. The microprocessor, with suitable software burned into an EPROM, can operate as a microcomputer for interchangeably collecting traffic data and unloading the data to another computer via a common connector. Upon initialization, the microprocessor samples various ports in the connector to determine whether to operate in a field mode or an office mode and, in the field, to which kind of detector it is connected.

대표청구항 ▼

A system for collecting and processing traffic data, comprising: a traffic detection means including a transducer for detecting passage of vehicles and providing a corresponding output signal responsive to each passing vehicle; a portable field data recording unit including a microprocessor means pr

A system for collecting and processing traffic data, comprising: a traffic detection means including a transducer for detecting passage of vehicles and providing a corresponding output signal responsive to each passing vehicle; a portable field data recording unit including a microprocessor means programmed for receiving and processing the transducer output signals in a field location and tabulating traffic data therefrom over predetermined time intervals and memory means for storing the traffic data; a traffic data processing computer means programmed for receiving, storing and further processing the traffic data from the field data recording unit at a location removed from the field location; and connector means for connecting the data recording unit to one of the transducer and the computer means; the data recording unit including a CPU clock for clocking the microprocessor means and a real-time clock for providing a time of day to the microprocessor means, the CPU clock and the real-time clock operable independently of each other.