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Gas Station Car Sensor

IP.com Disclosure Number: IPCOM000004499D
Publication Date: 2000-Dec-11
Document File: 3 page(s) / 33K

Publishing Venue

The IP.com Prior Art Database

Abstract

With rising oil prices, gasoline theft from gas stations has increased rapidly. It is necessary for the employees of a gas station to be aware of cars entering and leaving the fuel pumps. Improvements from existing methods could result in better security and better ability to service customers. Inductor coil loops are an existing technology successful with the use of detecting vehicles. How to detect a vehicle at a fuel pump accurately and in a non- intrusive manner? Traditional methods using air houses can register cars or even pedestrians or bicycles that are not operating the fuel pumps. These air houses can also interfere with snow removal or cleaning of the station area. What is need is a way to detect a vehicle at a fuel pump accurately and in a non-intrusive manner. The present invention is a method of using the existing technology of inductor coil vehicle sensors in the use of gas station security. An inductive loop is simply a coil of wire embedded in the road's surface. To install the loop one lays the asphalt and then comes back and cuts a groove in the asphalt with a saw. The wire is laid in the groove and sealed with a rubbery compound. Inductive loops work by detecting a change of inductance. Therefore, when a large metal object, like a vehicle, passes over the coil a change in inductance is detected.

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Gas Station Car Sensor

With rising oil prices, gasoline theft from gas stations has increased rapidly. It is necessary for the employees of a gas station to be aware of cars entering and leaving the fuel pumps. Improvements from existing methods could result in better security and better ability to service customers.

Inductor coil loops are an existing technology successful with the use of detecting vehicles.

How to detect a vehicle at a fuel pump accurately and in a non- intrusive manner?

Traditional methods using air houses can register cars or even pedestrians or bicycles that are not operating the fuel pumps. These air houses can also interfere with snow removal or cleaning of the station area. What is need is a way to detect a vehicle at a fuel pump accurately and in a non-intrusive manner.

The present invention is a method of using the existing technology of inductor coil vehicle sensors in the use of gas station security. An inductive loop is simply a coil of wire embedded in the road's surface. To install the loop one lays the asphalt and then comes back and cuts a groove in the asphalt with a saw. The wire is laid in the groove and sealed with a rubbery compound. Inductive loops work by detecting a change of inductance. Therefore, when a large metal object, like a vehicle, passes over the coil a change in inductance is detected.

Figure 1a Side view of Gas Station Vehicle Detector

Figure 1b Top view of Gas Station Vehicle Detector

Figures 1a and 1b illustrate a wire inductor coil 110 that is embedded in concrete 120 of a gas station. When a car 130 pulls up along side a fuel pump 140 a change in the inductance of inductor coil 130 occurs. This change in inductance is detected by electronics 150, which in turn signals the employee inside.