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Electric Gate Vehicle Detector

IP.com Disclosure Number: IPCOM000004500D
Publication Date: 2000-Dec-11
Document File: 4 page(s) / 31K

Publishing Venue

The IP.com Prior Art Database

Abstract

In farming and the livestock industry fencing and gates play a vital role in controlling the animals and containing them. For this reason gates can be cumbersome for vehicles to travel between fenced areas. Electric gates operated using an electric motor are often used so that the operator of the vehicle doesn’t need to exit the vehicle at each gate.

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Electric Gate Vehicle Detector

In farming and the livestock industry fencing and gates play a vital role in controlling the animals and containing them. For this reason gates can be cumbersome for vehicles to travel between fenced areas. Electric gates operated using an electric motor are often used so that the operator of the vehicle doesn't need to exit the vehicle at each gate.

How to control an electric gate for vehicle use without the use of a remote control?

Conventional electric fences often use a infrared remote control and sensor to control a gate. This can be ineffective when there are many different vehicles or operators passing through the gate. With this method each vehicle or possibly each operator would require a remote. This adds concerns of battery life or lost/forgotten remote controllers. What is needed is a way to control an electric gate for vehicle use without the use of a remote control.

How to control an electric gate for a vehicle and not have an animal trigger it?

Conventional sensor-triggered gate controllers operate using motion sensing or light changes. This method can be triggered by objects other than the vehicles desired. For instance animals can passing front of the gate and trigger the opening of the gate. What is needed is a way to control an electric gate for a vehicle and not have an animal trigger it.

The present invention is a method and apparatus incorporating existing inductor coil vehicle detection technology for the control of electric powered farm gates. 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 gate sensor sytem

Figure 1b Top view of gate sensor system.

Figure 1a and Figure 1b illustrate an inductor coil 110 embedded in a road or path 120. As a car 130 approaches an electric gate 140, it passes over inductor coil 110, thus causing a change in the inductance. This inductance change is detected by electronics 150, which are electrically connected to gate 140, and thus triggers electric gate 140 to open.