Abstract: A drive-by-wire non-contact capacitive throttle control apparatus and method of forming the same. A capacitive position sensor is provided, which includes a stationary electrode and a rotatable electrode. The rotatable electrode can be attached to a throttle lever such that the rotatable electrode rotates as the throttle lever rotates. The capacitance between the rotatable electrode and the stationary electrode varies with the position of the throttle lever. The position of the throttle lever can be measured by measuring the capacitance between the electrodes and a signal can be generated based on the sensed position. The signal can be electrically transmitted to an ECU (Electronic Control Unit) utilizing one or more electrical wires. The signal can be sent in the form of a varying voltage, which in turn controls the throttle of a vehicle.

Abstract: A drive by wire contactless throttle control which includes a contactless Hall-effect magnetic sensor. The Hall-effect magnetic sensor can be located in a mounting bracket in contactless association with a thumb lever on a handle bar. A magnet can be placed in a slot inside the thumb lever with a bonder and filled with an epoxy. The Hall-effect magnetic sensor senses the magnetic field produced by the magnet as the thumb lever rotates and determines position of the thumb lever and generates a signal based on the sensed position. The signal can be sent to an ECU (Electronic Control Unit) utilizing electrical wires in the form of varying voltage, which in turn controls throttle of a vehicle, such as an all terrain vehicle, snowmobile, etc.

Abstract: Core-less current sensor comprises two parallel conductors carrying equal currents in the same direction. The magnetic field in mid location of the two parallel conductors carrying equal currents in the same direction for all current magnitudes is zero in absence of an external magnetic interference. Sum of magnetic fields in two points equidistant from the mid location on both the sides is zero as magnetic fields at these points are equal in magnitude and opposite in polarity for all current magnitudes and for equal amount of currents flowing through both conductors in same direction in absence of an external magnetic interference. Two sensing elements can be arranged between the two parallel conductors for sensing the magnetic field due to currents flowing through them for the purpose of current measurement. Sensor output is the difference between two outputs measured by the sensing elements. Outputs of sensing elements can vary due to external interference.

Abstract: A magnetic pattern detection system (200) includes a housing (201), and a magnetic detector (100) including at least one magneto resistive (MR) sensor array (144) having an easy axis within the housing. A magnetic field source (151, 152) is within the housing (201), wherein the magnetic field source is operable when turned on to provide a magnetic field to line up random magnetic domains along the easy axis of the MR array (144). An amplifier (170) within the housing (201) is coupled to an output of the MR sensor array (144).

Abstract: Core-less current sensor comprises two parallel conductors carrying equal currents in the same direction. The magnetic field in mid location of the two parallel conductors carrying equal currents in the same direction for all current magnitudes is zero in absence of an external magnetic interference. Sum of magnetic fields in two points equidistant from the mid location on both the sides is zero as magnetic fields at these points are equal in magnitude and opposite in polarity for all current magnitudes and for equal amount of currents flowing through both conductors in same direction in absence of an external magnetic interference. Two sensing elements can be arranged between the two parallel conductors for sensing the magnetic field due to currents flowing through them for the purpose of current measurement. Sensor output is the difference between two outputs measured by the sensing elements. Outputs of sensing elements can vary due to external interference.

Abstract: A closed loop magnetic sensor system for measuring an input magnetic field from a magnetic field source has a compensation circuit, which can be for example a printed wire board, and a magnetic sensor, such as a Magnetoresistive (MR) sensor, for measuring an input magnetic field. Preferably, the magnetic sensor is magnetically coupled to the compensation circuit by arranging the magnetic sensor in an air gap provided in the compensation circuit. The compensation circuit has a compensating conductor, arranged on or in a dielectric medium, which can be configured as a plurality of nested coils. Electrical control circuitry, electrically, coupled to the magnetic sensor and compensating conductor, is adapted and arranged to drive a feedback current through the compensating conductor according to the output of the magnetic sensor such that the input magnetic field is substantially compensated at the magnetic sensor. The magnetic system can serve as current sensor for sensing current through a primary conductor.