The principle of eddy current measurement is a non-contact measurement principle. This type of sensor is particularly suitable for measuring rapid displacement changes without the need to apply an external force on the object being measured. Non-contact measurements are important for situations where the surface being tested is not allowed to touch, or where the sensor requires an extremely long life.
Strictly speaking, the principle of eddy current measurement should belong to an inductive measurement principle. The eddy current effect is derived from the energy of the oscillating circuit. The eddy current needs to be formed in a conductive material. An alternating current is supplied to the inner coil of the sensor probe to form a magnetic field around the sensor coil. If a conductor is placed in this magnetic field, according to Faraday's law of electromagnetic induction, eddy currents are excited in the conductor. According to the law of 楞, the direction of the magnetic field of the eddy current is exactly opposite to the magnetic field of the coil, and this will change the impedance value of the coil inside the probe. This change in impedance value is directly related to the distance between the coil and the object being measured. After the sensor probe is connected to the controller, the controller can obtain the amount of change in the voltage value from the sensor probe, and based on this, calculate the corresponding distance value. The eddy current measurement principle can be applied to all conductive materials. Since the eddy current can penetrate the insulator, even if the surface is covered with the metal material of the insulator, it can be used as the object to be measured of the eddy current sensor. The unique coil winding design meets the requirements of its high temperature measurement environment while achieving an extremely compact sensor shape.
All German rice bran eddy current sensors are designed to withstand dust, moisture, oil and pressure measurements. Despite this, there are some limitations to the use of eddy current sensors. For example, for different applications, a corresponding linearity calibration is required. Moreover, the output signal of the sensor probe is also affected by the electrical and mechanical properties of the object being measured. However, it is these limitations in the use that make the German mites eddy current sensors have nanometer resolution. At present, the German eddy current sensor can meet the measurement range of 100μm to 100mm. Depending on the range, the installation space can also be in the range of 2mm to 140mm.
Mechanical engineering leaving the displacement sensor is almost unimaginable. These displacement sensors are used to control different movements, monitor liquid levels, check product quality and many other applications. Here we talk about the different situations that sensors can face and the harsh environment, and how to deal with the disadvantages of customer service. Sensors are often used in very harsh environments such as oil, hot steam or violently fluctuating temperatures. Some sensors are also used on vibrating components, in strong electromagnetic fields or at a certain distance from the object being measured. For some important applications, accuracy, temperature stability, resolution and cutoff frequency are also required. In response to these limitations, different measurement principles have their own advantages and disadvantages. This also means that there is no uniform way to optimize the measurement principle.
Eddy current sensors can be subdivided into both shielded and unshielded. With a shielded sensor, a narrower electromagnetic field distribution can be produced and the sensor is not affected by the proximity of the radioactive metal. For unshielded sensors, the magnet wire is emitted from the side of the sensor. The range is often larger. Proper installation is critical to signal quality. Other objects in the vicinity will also affect the signal.
German rice bran has more than 40 years of experience, constantly innovating and improving the performance of displacement sensors. Continuous progress has been made in applications such as R&D, testing, quality control and equipment monitoring.
The eddyNCDT product family achieves a maximum cut-off frequency of 25 kHz while meeting nanometer resolution.
A typical application for eddy current sensors is the fully automated welding tester. The tester is used for weld quality control. The reason why the eddy current sensor is used here is that only the eddy current sensor can withstand the strong electromagnetic field brought about by the welding robot. The measurement also meets micron-level accuracy and a 4mm range.
Strictly speaking, the principle of eddy current measurement should belong to an inductive measurement principle. The eddy current effect is derived from the energy of the oscillating circuit. The eddy current needs to be formed in a conductive material. An alternating current is supplied to the inner coil of the sensor probe to form a magnetic field around the sensor coil. If a conductor is placed in this magnetic field, according to Faraday's law of electromagnetic induction, eddy currents are excited in the conductor. According to the law of 楞, the direction of the magnetic field of the eddy current is exactly opposite to the magnetic field of the coil, and this will change the impedance value of the coil inside the probe. This change in impedance value is directly related to the distance between the coil and the object being measured. After the sensor probe is connected to the controller, the controller can obtain the amount of change in the voltage value from the sensor probe, and based on this, calculate the corresponding distance value. The eddy current measurement principle can be applied to all conductive materials. Since the eddy current can penetrate the insulator, even if the surface is covered with the metal material of the insulator, it can be used as the object to be measured of the eddy current sensor. The unique coil winding design meets the requirements of its high temperature measurement environment while achieving an extremely compact sensor shape.
All German rice bran eddy current sensors are designed to withstand dust, moisture, oil and pressure measurements. Despite this, there are some limitations to the use of eddy current sensors. For example, for different applications, a corresponding linearity calibration is required. Moreover, the output signal of the sensor probe is also affected by the electrical and mechanical properties of the object being measured. However, it is these limitations in the use that make the German mites eddy current sensors have nanometer resolution. At present, the German eddy current sensor can meet the measurement range of 100μm to 100mm. Depending on the range, the installation space can also be in the range of 2mm to 140mm.
Mechanical engineering leaving the displacement sensor is almost unimaginable. These displacement sensors are used to control different movements, monitor liquid levels, check product quality and many other applications. Here we talk about the different situations that sensors can face and the harsh environment, and how to deal with the disadvantages of customer service. Sensors are often used in very harsh environments such as oil, hot steam or violently fluctuating temperatures. Some sensors are also used on vibrating components, in strong electromagnetic fields or at a certain distance from the object being measured. For some important applications, accuracy, temperature stability, resolution and cutoff frequency are also required. In response to these limitations, different measurement principles have their own advantages and disadvantages. This also means that there is no uniform way to optimize the measurement principle.
Eddy current sensors can be subdivided into both shielded and unshielded. With a shielded sensor, a narrower electromagnetic field distribution can be produced and the sensor is not affected by the proximity of the radioactive metal. For unshielded sensors, the magnet wire is emitted from the side of the sensor. The range is often larger. Proper installation is critical to signal quality. Other objects in the vicinity will also affect the signal.
German rice bran has more than 40 years of experience, constantly innovating and improving the performance of displacement sensors. Continuous progress has been made in applications such as R&D, testing, quality control and equipment monitoring.
The eddyNCDT product family achieves a maximum cut-off frequency of 25 kHz while meeting nanometer resolution.
A typical application for eddy current sensors is the fully automated welding tester. The tester is used for weld quality control. The reason why the eddy current sensor is used here is that only the eddy current sensor can withstand the strong electromagnetic field brought about by the welding robot. The measurement also meets micron-level accuracy and a 4mm range.
The high quality Portable Speaker Box has fashionable shape, lound sound,soft plastic handle, can be applied to different occasions, such as supermarket, classroom, etc. Extensive protection from short-circuit, overload and high temp is ensured. Cooling system ensures the extreme quite sound system.
Wheeled Trolley speaker,Portable Sound Box,Wireless Portable Speaker,Trolley speaker box,Portable Bluetooth Speakers
Taixing Minsheng Electronic Co.,Ltd. , https://www.ms-speakers.com