DETECTION OF THE STATE OF ELECTRICAL EQUIPMENT OF A VEHICLE

• US 20110204885A1
• Filed: 01/18/2011
• Published: 08/25/2011
• Est. Priority Date: 01/21/2010
• Status: Abandoned Application

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Original Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Inventors: Le Goff, Alexis, Blanpain, Roland
• Application Number:
  US13/008,550
• Publication Number:
  US 20110204885A1
• Time in Patent Office: Days
• US Class Current: 324/244
• CPC Class Codes: B60Q 11/005 for lighting devices, e.g. indicating if lamps are burning or not

Abstract

A method for detecting an on or off state of electrical equipment of a vehicle, wherein the amplitudes of the magnetic field measured in at least two directions are analyzed to isolate the respective contributions of the different pieces of electrical equipment and deduce their state.

Claims

1. A method for detecting an on or off state of electrical equipment of a vehicle, wherein the amplitudes of the magnetic field measured in at least two directions are analyzed to isolate the respective contributions of the different pieces of electrical equipment and deduce their state.

2. The method of claim 1, wherein the analysis takes into account a training phase in which the pieces of equipment are successively and individually turned on and off.

3. The method of claim 2, wherein the respective states of the pieces of equipment are obtained from values representative of the amplitude of the magnetic field in said directions and from coefficients obtained in the training phase.

4. The method of claim 2, wherein the respective states of the pieces of equipment are obtained from values representative of amplitude variations of the magnetic field in said directions and from coefficients obtained in a training phase.

5. The method of claim 4, wherein the respective states of the pieces of equipment are obtained by calculating probabilities of state combinations.

8. The system of claim 6, wherein the interpretation circuit implements the method of claim 1.

6. A system for detecting an on or off state of electrical equipment of a vehicle, comprising:

at least two magnetic sensors in different directions; and

a circuit for interpreting the signals provided by each sensor to isolate the respective contributions of the different pieces of electrical equipment to the magnetic field.

7. The system of claim 6, comprising three sensors integrated in a three-axis magnetometer.

9. A motor vehicle equipped with the system of claim 6.