Eddy current type sensor measuring head

Abstract

The invention relates to the technical field of pneumatic sensors, in particular to an eddy current type sensor measuring head. The eddy current type sensor measuring head comprises a volute, the diameter of the upper end of the volute is large, the diameter of the lower end of the volute is small, an input port is formed in the large-diameter upper end of the volute in the tangent direction of the volute, the small-diameter lower end is an exhaust port, an axis pipe is arranged at the axis position of the volute from top to bottom, the upper portion of the axis pipe extends out of the top face of the volute to form an output port, the output port is provided with a corrugated pipe connected with a sensor, the lower portion of the axis pipe retracts in the volute, the lower end face of the axis pipe is not flush with the bottom end face of the volute, the outer diameter of the axis pipe is smaller than the diameter of the lower end of the volute, and the measuring head is connected with the sensor through the corrugated pipe. The sensor is protected against damage when impacted, the measuring head feeds back measurement information in an eddy current mode, and measurement is sensitive and accurate.

Description

technical field [0001] The invention relates to the technical field of pneumatic sensors, in particular to an eddy current sensor measuring head. Background technique [0002] The pneumatic sensor does not contact the detection element, and uses various physical characteristics presented by the gas flow in the flow field to measure various physical quantities. It can detect dimensional accuracy, positioning accuracy, counting, deviation correction, distance measurement, liquid level control, presence or absence judgment, material detection, etc., and is widely used in industrial production. For example, in production, pneumatic sensors are required to perform positioning and distance measurement of some large machines or parts with low precision. The existing sensors for coarse positioning and distance measurement of large machines or parts are all integral structures. It is integrated with the sensor, the structure is complex, and the measurement is not sensitive. In produ...

AI Technical Summary

Problems solved by technology

For example, in production, pneumatic sensors are required to perform positioning and distance measurement of some large machines or parts with low precision. The existing sensors for coarse positioning and distance measurement of large machines or parts are all integral structures. It is integrated with the sensor, the structure is complex, and the measurement is not sensitive. In production, the sensor is often damaged due to accidental collision with the measured object, resulting in loss

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