特点与优势

易于使用

l   开箱即用，可与所有标准LORDMicroStrain®DVRT®传感器配合使用

l   用于嵌入式和空间受限应用的微型机身

l   用于快速缩放的单元之间的相同性能

高性能

l   适用于难以测量的高动态范围

l   随时可以使用LORDMicroStrain®无线传感器网络

应用

           i.  人体应变计，骨骼和组织中的微动和变形

          ii.  生产线监控微型位置控制元件的过程控制

          iii. 线性和角度运动控制

          iv. 测量材料和结构中的应变和挠度

          v.  用于质量控制的尺寸测量

系统总览

DEMOD-DC®微型串联信号调节器采用直流电源供电，可过滤来自电源的瞬态电压，并为DVRT®提供正弦波激励。该激励用于测量传感元件的微小阻抗变化。精密解调器组件提供整流和差分放大。数字微调可确保传感器与传感器之间的一致性。模拟输出经过滤波和缓冲，以提供干净的高电平信号。

DEMOD-DC®建议与所有标准LORDMicroStrain®DVRT®一起使用，其中需要更低成本和更小尺寸的信号调节器。如果预计传感器会在其传感线圈（其主体）上暴露于较热环境下，建议使用温度补偿DEMOD-DVRT®-TC。此外，如果LORDMicroStrain®DVRT®已定制并使用一个线圈构建，则再次推荐使用DEMOD-DVRT®-TC。

通常，DEMOD-DC®与特定的LORDMicroStrain®DVRT®一起订购，并作为一对销售。该对在工厂一起校准，并提供共同的校准证书。这种“配对”校准可确保到用户手中后性能准确。该证书提供了多种输出计算，包括线性拟合，多段拟合和多项式拟合。

产品规格

The DEMOD-DC® in-line signal conditioner makes DVRT® sensors as easy to use as a potentiometer. With integral signal conditioning electronics, the user connects power, ground and analog out, and the DEMOD-DC® outputs a buffered, high-frequency response voltage proportional to linear position. During the manufacturing process the analog output voltage is digitally trimmed, ensuring that every DVRT®’s offset and gain values match one another. The DEMOD-DC® provides internal power regulation and reverse polarity protection, and will operate with a wide range of input voltages.

Features & Benefits

Ease of Implementation

• out-of-the-box use with all standard LORD MicroStrain® DVRT® sensors

• miniature body for embedded and space restricted applications

• identical performance between units for quick scaling

High Performance

• high dynamic range for difficult measurements

• ready for use with LORD MicroStrain® wireless sensor network

Applications

• In-vivo Strain, Micromotion and deformation in Bone & Tissue

• Process Control for Production-Line Monitoring Miniature Position Control Elements

• Linear & Angular Motion Control

• Measuring Strain and Deflection in Materials and Structures

• Dimensional Gauging for Quality Control

  
  

System Overview

Operating from a DC power supply, the DEMOD-DC® Miniature In-line Signal Conditioner filters incoming transients from the power supply, and supplies a sine wave excitation to the DVRT®. This excitation is used to measure minute impedance changes of the sensing elements. Precision demodulator components provide rectification and differential amplification. Digital trimming ensures conformity from sensor to sensor. The analog output is filtered and buffered to provide clean, high level signals.

The DEMOD-DC® is recommended for use with all standard LORD MicroStrain® DVRT® where a lower cost and smaller size signal conditioner is required. If the sensor is expected to be exposed to thermal gradients across its sensing coils (its body), the temperature compensated DEMOD-DVRT® -TC is recommended. Additionally, if the LORD MicroStrain® DVRT® has been customized and built with one coil, the DEMOD-DVRT® -TC is again recommended.

Typically, a DEMOD-DC® is ordered with a specific LORD MicroStrain® DVRT® and sold as a pair. The pair is calibrated together at the factory and delivered with a common calibration certificate. This ‘paired’ calibration ensures accurate performance in the user’s hands. The certificate provides several output calculations including Linear Fit, Multi-Segment Fit and Polynomial Fit.

Specifications