Vehicle detector with operational display
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 11, 2000
Grant Date -
N/A
app pub date -
Apr 24, 1997
filing date -
Apr 24, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A programmable vehicle detector with operator actuatable function selection and parameter value setting keys, and an operational display. A small cluster (four) of key switches enables an operator to select programmable vehicle detector functions, such as pulse/presence, scanning/non-scanning, end of green control; and also adjust the value of settable parameters, such as loop frequency, sensitivity, delay time, and maximum presence time. The value of certain parameters is displayed, either by manual interrogation by operation of the switches during a set mode or automatically during normal operation. During normal operation, the display also indicates dynamically the relative value of the loop inductance, using a unique bar graph, the generation of Call a signal, and the time remaining in a delay time period and a maximum presence time period. The display further indicates which of several channels has been selected for function and parameter programming, or is currently being monitored for operation. The vehicle detector can be operated as both a scanning multi-channel detector or a non-scanning multi-channel detector.
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