DEVICE AND METHOD FOR TRAFFIC SURVEILLANCE
First Claim
1. Vehicle detector, comprising:
- a vehicle sensor arranged for sensing disturbances caused by a vehicle;
a digitizer connected to said vehicle sensor and arranged for encoding a signal from said vehicle sensor into a digital representation;
a memory connected to said digitizer and arranged for storing said digital representation;
an antenna;
a transmitter connected to said memory and said antenna;
a controller arranged for controlling operation of said vehicle sensor, said digitizer, said memory and said transmitter;
a battery powering said vehicle sensor, said transmitter and said receiver;
and a housing enclosing said vehicle sensor, said digitizer, said memory, said transmitter and said controller;
said housing providing protection against mechanical damage and moisture for said vehicle sensor, said digitizer, said memory, said transmitter and said controller, thereby enabling said housing to be placed under ground;
said antenna is provided outside said housing and at a distance from said housing for enabling placement of said antenna within a roadway surface coating; and
said controller is arranged for turning off at least one of said transmitter, said receiver, and said vehicle sensor during a predetermined inactivity period and for activating said transmitter and said receiver and transmitting a request for further instructions when said inactivity period is ended.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle detector (10) comprises a vehicle sensor (14) arranged for sensing disturbances caused by a vehicle, a digitizer of a microprocessor (20) connected to the vehicle sensor (14). The vehicle detector (10) further comprises a memory (18) connected to the digitizer and arranged for storing the digital representation, an antenna (12) and a transmitter of a radio unit (40). The microprocessor (20) also comprises a controller arranged for controlling operation of the vehicle sensor (14), and the transmitter. The vehicle detector has a housing (49) enclosing the vehicle sensor (14), the digitizer, the memory, the transmitter and the controller. The housing (49) provides protection against mechanical damage and moisture, thereby enabling the housing to be placed under ground. The antenna (12) is provided outside the housing (49) and at a distance from the housing (49) for enabling placement of the antenna (12) within a roadway surface coating.
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Citations
20 Claims
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1. Vehicle detector, comprising:
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a vehicle sensor arranged for sensing disturbances caused by a vehicle; a digitizer connected to said vehicle sensor and arranged for encoding a signal from said vehicle sensor into a digital representation; a memory connected to said digitizer and arranged for storing said digital representation; an antenna; a transmitter connected to said memory and said antenna; a controller arranged for controlling operation of said vehicle sensor, said digitizer, said memory and said transmitter; a battery powering said vehicle sensor, said transmitter and said receiver; and a housing enclosing said vehicle sensor, said digitizer, said memory, said transmitter and said controller; said housing providing protection against mechanical damage and moisture for said vehicle sensor, said digitizer, said memory, said transmitter and said controller, thereby enabling said housing to be placed under ground; said antenna is provided outside said housing and at a distance from said housing for enabling placement of said antenna within a roadway surface coating; and
said controller is arranged for turning off at least one of said transmitter, said receiver, and said vehicle sensor during a predetermined inactivity period and for activating said transmitter and said receiver and transmitting a request for further instructions when said inactivity period is ended. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14, 15, 16, 17, 18, 19, 20)
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9. Method for providing traffic information, comprising the steps of:
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sensing disturbances caused by a vehicle; digitalizing signals of said disturbances into a digital representation; storing said digital representation; and transmitting signals to a traffic surveillance node by use of radio signals; said steps of sensing, digitalizing and storing are performed in a device placed under ground; said step of transmitting comprises the step of providing said signals to be transmitted over a distance to an antenna placed within a roadway surface coating, disabling performing of said steps of sensing disturbances, transmitting signals and receiving signals during a predetermined inactivity period; and performing said step of transmitting signals and transmitting a request for further instructions when said inactivity period is ended. - View Dependent Claims (10, 11, 12, 13)
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Specification