Micro eddy current sensors detect defects in machined parts based on electromagnetic induction principles and eddy current effects, as follows:

Detection principle:The coil inside the sensor probe is subjected to high-frequency alternating current, which generates a high-frequency alternating magnetic field. When the magnetic field approaches the conductive workpiece, eddy currents will be induced on the surface of the workpiece. The magnetic field generated by eddy currents is opposite in direction to the magnetic field of the original coil, which weakens the original magnetic field and causes a change in the impedance of the coil.

Ways to discover defects:If there are defects on or near the surface of the workpiece, such as cracks, pores, etc., it will change the distribution of eddy currents, thereby affecting the impedance of the coil. Sensors monitor this impedance change in real-time, and by analyzing the change data, they can determine whether there are defects and the approximate location and size of the defects.

Method for discovering workpiece abnormalities:The eddy current distribution and coil impedance changes of normal workpieces follow a certain pattern. When there is an abnormality in the workpiece, the change in eddy current distribution will cause the coil impedance to deviate from the normal range. By comparing the impedance change signal monitored in real-time with the signal under normal conditions, if there are significant fluctuations or deviations from the standard value in the signal, it can be determined that there is an abnormality in the workpiece.

Senser Micro Eddy Current SensorThe product features are as follows:

• Non contact measurement: Avoid the wear and error caused by traditional contact measurement.

• High precision: With high linearity and resolution, it can provide accurate measurement results.

• Good reliability: well-designed and capable of long-term stable operation in harsh environments.

• High sensitivity: able to respond quickly to small displacement changes, strong anti-interference ability, and not affected by media such as oil and water.

• Fast response speed: can quickly capture displacement changes of the measured object, suitable for real-time monitoring.

• Flexible assembly: Some models of probes and preamplifiers can be flexibly assembled/disassembled, and installation does not require special tools.

• Good parameter consistency: Some products support interchangeable probes, extension cables, and preamplifiers without the need for special matching or calibration.

  
  

The reasons why using micro eddy current sensors can achieve cost reduction and efficiency improvement are as follows:

• Reduce equipment wear and tear: The non-contact measurement method avoids wear and tear between the sensor and the object being measured, extends the service life of the sensor and the device being measured, and reduces equipment maintenance and replacement costs.

• Improve detection efficiency: Fast response speed, fast detection speed, real-time monitoring, can quickly obtain detection results, suitable for online detection, improves production efficiency, and reduces detection time costs.

• Reduce labor costs: Automated testing can be achieved without frequent human involvement in the testing process, reducing manpower requirements and lowering labor costs.

• Adapt to harsh environments: With strong environmental adaptability, it can work stably in harsh environments such as oil stains, dust, and moisture without the need for additional protective measures and environmental modifications, reducing costs.

• Reduce scrap rate: High precision detection can timely detect defects in processed parts, facilitate timely adjustment of production processes, reduce the production of unqualified products, and lower the cost of scrap losses.