Kaman Products




KD-5100

Applications

  • Fast steering mirror.
  • Servo control position feed back.
  • Stage positioning.
  • Angular displacement indication.
  • X-Y orbit position feed back.
  • Stylus position.


DIT-5200 Differential Impedance Transducer

(datasheet download)

Features
  • True differential for common mode rejection at an economical price.
  • High precision eddy current balanced bridge technology.
  • Capable of subnanometer resolution.
  • Thermal stability ±.03% FS/°C, at null ±.005% FS/°C.
  • Small package size: just 7.7 cubic inches.
  • High sensitivity: up to 10V/mil (394 mV/µm).
  • Extremely linear, to 0.1% full range.
  • Single and dual channel configurations.

DIFFERENTIAL MEASUREMENTS
In an eddy current differential system, the two coils in the inductive bridge are housed in two separate sensors. Rather than one active coil and one reference coil, both sensors contain active coils as in figure 2. These two sensors are usually placed on opposite sides of a target or opposite sides of a target pivot point, as in figure 1.
THEORY OF OPERATION
As the target moves closer to one sensor, it moves away from the other. Therefore as the impedance in one leg of the inductive bridge increases, the other decreases. This push-pull effect amplifies the linear output-per-displacement and eliminates the need for summation amplifiers that add noise and drift. As a result, differential systems provide greater resolution and thermal stability than single-ended systems.

| Home | Kaman | Contact Us |
Web site design and maintenance by Chamois Software