Magnetic compensation Circuit and method to compensate the output of a Magnetic Sensor, in response to changes in a primary Magnetic Field

摘要

A solution to compensate the magnetic field Sensor to allow the detection of a small magnetic field under the presence of a higher Magnetic Field comprises: a Magnetic Field sensor that detects the magnetic field produces An analog signal which is then encoded po R an Analog to Digital Converter into a digital Transmission.A Controller operating in Digital Transmission incorporates additional Sensor Data to create a compensation Signal which is sent to a digital to analog Converter. The Signal compensation, then modifies the output of the sensor in the magnetic field before entering the CAD.The Compensation is controlled through software and thus is adaptable to various conditions that require compensation. Apart from being easily adjustable compensation can give Dynamic Responses to changing conditions.The Invention is particularly applicable to the Aero electromagnetic Survey Techniques, when scattered Small Magnetic Fields of the Earth are measured in the presence of a larger Field transmitted