Inductive Measuring Apparatus and Calibration Device and Method

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This patent describes an inductive measuring apparatus designed to provide more accurate measurements by actively calibrating and correcting for interference or errors during operation. The device includes a transmitter and receiver, both with coils, and utilizes a calibration device that introduces a controlled current pulse into the coil. The response from this pulse is processed to detect and correct for disturbances or noise, particularly those caused by temperature changes or electronic drift. This ensures that the final measured result is significantly less distorted by external or internal interferences.

Use CasesContent extracted from patent full text and abstract with AI.

• Soil conductivity and subsurface sensing for agriculture, geology, or archaeology.
• Detection and localization of underground metallic objects such as pipes, cables, or unexploded ordnance.
• Environmental and ground water research that requires accurate assessment of ground properties.
• Quality control in industrial settings requiring precise inductive measurements (e.g., metal detection, process monitoring).
• Calibration and verification of electromagnetic sensors in laboratory or field applications.

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly improves measurement accuracy by actively compensating for interference and drift.
• Enables continual calibration during real-time measurements, reducing downtime and the risk of inaccurate data.
• Reduces technical complexity and the need for operator expertise thanks to an automated correction process.
• Scalable and adaptable to different measuring needs and environments by supporting multiple coils and calibration routines.
• Enhances reliability over a wide range of temperatures and conditions, making it robust for field use.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a measuring apparatus having a transmitter (1, 2, 3) for transmitting a measurement signal, a receiver (4) for receiving a response to the transmitted measurement signal and a signal processing device (7, 8, 9; 18) for determining a measurement result from the response, wherein the transmitter and/or the receiver has/have a coil (3; 4; 16), having a calibration device for reducing an interfering influence on the measurement result, characterized in that the calibration device is configured in such a manner that a current pulse can be introduced into the coil (3; 4; 16) from a current source (DC) and the signal processing device (7, 8, 9; 18) can carry out a measured value correction with the aid of the calibration signal generated by the current pulse and can determine a measurement result from the response and the measured value correction. The invention also relates to a measuring method.