The **YVD-F-R** is a specific model within a series of **Inductive Displacement Transducers** (also known as LVDT-style sensors). These devices are primarily used for high-precision measurement of linear movement, position, and thickness in industrial automation. Below is a breakdown of its electronic components, technical specifications, and internal logic. --- ### 1. Key Electronic Specifications The "YVD" series typically operates on a differential transformer principle. Here are the standard electrical characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Input Voltage** | 12V DC or 24V DC (Model dependent) | | **Output Signal** | 0–5V, 0–10V, or 4–20mA | | **Linearity** | < 0.1% to 0.5% of Full Scale | | **Response Frequency** | Up to 100Hz - 500Hz | | **Working Temperature** | -20°C to +80°C | | **Protection Class** | IP65 or IP67 (Dust and Water resistant) | --- ### 2. Internal Electronic Structure The YVD-F-R functions through three main electronic stages housed within its cylindrical metal body: #### A. The Oscillator (Driver Circuit) Since inductive sensors require AC to generate a magnetic field, the internal electronics convert the DC input into a high-frequency AC sine wave. This energizes the **Primary Coil**. #### B. The Sensing Element (The Coils) * **Primary Coil:** Receives the AC signal. * **Secondary Coils:** Two identical coils wound in opposition. As the internal "core" (the moving rod) shifts, the magnetic coupling between the primary and secondary coils changes. * **Differential Logic:** The position is determined by the difference in voltage induced in the two secondary coils. #### C. Signal Conditioner (The Converter) The raw AC output from the coils is unreadable by standard PLCs. The internal circuitry performs: 1. **Rectification:** Converts AC to DC. 2. **Filtering:** Removes electrical noise. 3. **Amplification:** Scales the small millivolt signal into a robust **0-10V** or **4-20mA** industrial signal. --- ### 3. Model Suffix Breakdown While nomenclature can vary slightly by manufacturer (often associated with brands like *YOVON* or *ZSY*), the "F-R" usually indicates specific physical or electrical configurations: * **YVD:** Series designation for Inductive Displacement Sensors. * **F:** Often denotes a **Flange mount** or a specific **Internal Amplifier** type. * **R:** Usually indicates a **Spring Return** mechanism (the probe is pushed out by an internal spring rather than being physically attached to the moving object). --- ### 4. Wiring Diagram Representation Standard 3-wire or 4-wire configurations are common for the YVD series: ```markdown Color Code (Typical) | Function | Description ---------------------|------------------|--------------------------- Brown | V+ | Power Supply (12/24V DC) Blue | GND | Power Ground / Signal Com Black/White | Out | Analog Signal (0-10V / 4-20mA) ```