The SPN series displacement sensor of Sanseer Measurement And Control uses a measurement technology based on the electromagnetic principle, which usually belongs to the category of inductive displacement sensor. Its working principle is mainly based on the working mode of the transformer, using the movement of the iron core (or magnetic ring) in the magnetic field to change the inductance of the circuit, thereby realizing the measurement of displacement. The following is a detailed explanation of the working principle of the SPN series displacement sensor:
1. **Iron core movement and inductance change**:
- In the SPN series displacement sensor, there is a movable iron core and one or more fixed coils. When the iron core moves along the displacement direction, its position in the magnetic field changes, causing the inductance of the coil to change.
2. **Differential transformer principle**:
- For differential transformer displacement sensors, there are two secondary windings connected in a differential manner. The movement of the iron core causes the magnetic flux of the two windings to change differently, thereby generating a differential voltage output. This output voltage is proportional to the displacement of the iron core, so it can be used to measure displacement.
3. **Signal processing**:
- The voltage signal induced in the coil is very weak and needs to be amplified and processed by a signal conditioning circuit. In the SPN series sensors, high-precision signal processing circuits may be built-in to ensure the stability and accuracy of the output signal.
4. **Digital output**:
- The processed analog signal can be converted into a digital signal for further digital processing and analysis. This is usually achieved through an analog-to-digital converter (ADC), which converts the analog voltage signal into a digital value.
5. **Multiple output methods**:
- The SPN series displacement sensor supports a variety of output methods, including digital communication interfaces such as RS232, RS485 and USB, so that the sensor can be easily connected to a computer, PLC or other industrial automation equipment.
6. **High accuracy and repeatability**:
- The design of the SPN series displacement sensor focuses on accuracy and repeatability. Through precision machining and high-quality material selection, the high accuracy and long-term stability of the measurement results are ensured.
7. **Strong adaptability**:
- The SPN series displacement sensor of Sanseer Measurement And Control is designed with a variety of drive methods, such as rebound, vacuum suction and pneumatic, etc., to adapt to different industrial environments and application requirements.
Through the above working principle, the SPN series displacement sensors of Sanseer Measurement And Control can provide accurate and reliable displacement data for various industrial automation and precision measurement applications.
