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LVDT Calibration System

CAL-LVDT-100 / RY-LVDT-200
High-Precision Automated LVDT Calibration System

Product Description

I. Product Overview
         The CAL-LVDT-200 is a bespoke, metrology-grade calibration platform specifically engineered for Linear Variable Differential Transformer (LVDT) sensors. Built around the L501 linear actuator unit with an integrated high-precision linear optical encoder (grating scale), the system combines precision mechanical architecture with a closed-loop control topology. It enables fully automated, high-fidelity calibration for a wide array of LVDT specifications.
         Compared to conventional 25mm manual calibration rigs, this system provides an extended operational stroke, a higher degree of automation, and superior coaxial stability. It serves as a premier solution for sensor R&D, production-line characterization, and metrological verification.

II. Core Advantages
1. Sub-micron Precision with 200mm Extended Calibration Stroke
  • The drive unit features a 200mm wide-range effective stroke, accommodating the calibration requirements of long-displacement sensors.
  • Leveraging a 0.1μm motion resolution and ±0.2μm bi-directional repeatability, the system provides an ultra-precise displacement reference standard for calibration cycles.
2. Coaxial Architecture to Eliminate Alignment Errors
  • Utilizing a dual L-shaped aluminum alloy mounting plate paired with a 3-jaw self-centering chuck, the system ensures secure and centered sensor fixturing.
  • The positioning interfaces achieve 0.01mm-level concentricity, with a total system coaxiality of ≤0.05mm post-clamping. This high degree of geometric alignment inherently eliminates offset errors and parallax deviations during the metrological process.
3. Universal Compatibility with Tool-less Fixturing
  • The adjustable clamping range of the chuck accommodates various LVDT geometries with diameters up to 48mm and strokes up to 200mm.
  • This "universal-fit" design significantly enhances throughput for multi-model sensor batches without the need for frequent jig changeovers.
4. Rigid Construction for Zero-Redundancy Displacement Transfer
  • The drive unit is secured to a high-flatness aluminum alloy baseplate via precision dowel pins, ensuring long-term structural determinism.
  • The high-rigidity architecture ensures zero-backlash and zero-redundancy during displacement transfer, safeguarding the integrity and consistency of the calibration datasets.
5. Advanced Closed-Loop Control & Autonomous Software
  • Employs a high-performance closed-loop stepper controller, ensuring high-bandwidth dynamic response and deterministic positioning.
  • The dedicated automation software allows for pre-set step increments and cycle counts, automatically executing data acquisition and linearity/hysteresis analysis.
 
III. Technical Specifications
Parameter Specification Remarks
Effective Stroke 200 mm Extended range
Motion Resolution 0.1 μm Sub-micron precision
Bi-directional Repeatability ±0.2 μm Metrology-grade consistency
Coaxiality (Post-clamping) ≤0.05 mm Minimizes cosine errors
Sensor Diameter Compatibility ≤48 mm Universal 3-jaw chuck
Feedback Mechanism Linear Optical Encoder High-resolution grating scale
Control Mode Closed-loop Servo-Stepper / Automated Suite Deterministic control
Base Material High-flatness Aluminum Alloy Specialized surface finish
Total System Mass Approx. 7 kg Portable/Benchtop design


IV. Application Fields
  • Sensor Manufacturing: Full-scale calibration and Final Acceptance Testing (FAT) for displacement sensors.
  • Metrology Institutes: Periodic calibration of high-precision LVDTs and inductive gauging probes.
  • Aerospace & Precision Engineering: Micro-displacement verification and thermo-mechanical stability experiments for high-precision sub-systems.
         By combining a custom coaxial fixturing solution with a high-fidelity drive unit, this system elevates LVDT calibration from manual incremental stepping to a new standard of automated digital metrology.