Vehicle Sensor, Detecting Method Thereof And Self Enforcing Pay-By-Phone Parking System Using The Same

A vehicle presence detecting sensor associated with a defined area, wherein, the sensor comprises a microprocessor, and a first detecting module, a second detecting module, as well as a third module, respectively connected to and controlled by the microprocessor:

• the first detecting module, for detecting any magnetic field change in the defined area and conveying the field change microprocessor;
• the second detecting module triggered by the microprocessor when a change of magnetic field is detected, for measuring a distance between an object and the sensor by means of radar telemetering and conveying the distance to the microprocessor;
• the third module triggered by the microprocessor when the distance measured falls out of a pre-determined distance range, for further detecting the change of magnetic field and conveying a detailed change of magnetic field to the microprocessor;
• the microprocessor, for activating the second detecting module when a change of magnetic field is detected by the first detecting module or activating the third module when the distance measured falls out of the pre-determined distance range, and for conforming the presence of a vehicle by comparing the distance measured by the second detecting module with the predetermined distance range, or by matching the value of the detailed change of magnetic field detected by the third module, with pre-stored values.