Vehicle detector with operational display
DCFirst Claim
1. A vehicle detector comprising:
- means for detecting the occupancy state of a loop detection zone;
manually actuatable flnction switches coupled to said detecting means for enabling operator control of function state selection and selection of any one of a plurality of vehicle detector parameter values; and
a variable display device coupled to said detecting means for displaying selected function states, the identification of a selected vehicle detector parameter, and the actual value of a vehicle detector parameter selected by at least one of said function switches.
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Accused Products
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.
14 Citations
44 Claims
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1. A vehicle detector comprising:
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means for detecting the occupancy state of a loop detection zone; manually actuatable flnction switches coupled to said detecting means for enabling operator control of function state selection and selection of any one of a plurality of vehicle detector parameter values; and a variable display device coupled to said detecting means for displaying selected function states, the identification of a selected vehicle detector parameter, and the actual value of a vehicle detector parameter selected by at least one of said function switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A variable vehicle detector display for facilitating operator control of function state selection, vehicle detector parameter selection, and vehicle detector parameter value selections, said display comprising:
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a first variable display portion including a plurality of individually activatable bar-like segments together defining a bar graph for displaying the relative magnitude of at least one vehicle detector parameter; a second variable display portion having a plurality of character regions for displaying actual values of at least one vehicle detector parameter; and a third display portion having a plurality of individually activatable message indicators for indicating a selected parameter whose actual value is being displayed by said second portion. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A vehicle detector comprising:
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means for detecting the occupancy state of a loop detection zone; at least two manually actuatable function switches coupled to said detecting means for enabling operator control of function state selection, selection of any one of a plurality of vehicle detector parameters, and vehicle detector parameter value selection; and a variable display device coupled to said detecting means for indicating a selected parameter and the actual value of a parameter selected by at least one of said function switches. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification