Development of Real-Time Dielectric Relaxation Spectrometer by Using Ultrahigh-Speed Gate Arrays

利用超高速门阵列开发实时介电弛豫谱仪

• 批准号: 62850003
• 负责人: HAYAKAWA Reinosuke
• 金额: $ 8.83万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62850003/
• 关键词: Dielectric relaxation spectroscopy; Real-time measurement; Walsh-Hadamard transform; Multi-frequency signal; Non-stationary system; 高分子強誘電体; 分極反転

The real-time dielectric relaxation spectrometer developed in this study consists of a waveform generator, an electric displacement detector, a waveform analyzer and a personal computer as a system controller. A summary of the study is as follows:(1) We developed a waveform analyzer which performs a parallel processing of Walsh-Hadamard transform by using ultra-fast ECL gate arrays to demodulate simultaneously all the frequency components is the multi-frequency response of electric displacement.(2) We developed a waveform generator which synthesizes a multi-frequency waveform of electric field to be applied to the sample. The waveform data, transferred from the computer, are stored in the memory unit of the generator and are then converted to an analog signal according to the clock pulse sequence selected by the computer.(3) We constructed a broadband electric displacement detector and prepared a sample cell for a test measurement. Further, we developed computer softwares for measurement control, spectrum display and data analysis.(4) By using the spectrometer, we observed the change in the high-frequency dielkectric relaxation spectra of ferroelectric VDF-TrFE copolymers in the course of polarization reversal.

本研究开发的实时介电弛豫谱仪由波形发生器、电位移检测器、波形分析仪和作为系统控制器的个人计算机组成。研究总结如下：(1)我们开发了一种波形分析仪，利用超快ECL门阵列对Walsh-Hadamard变换进行并行处理，同时解调所有频率分量，即电的多频响应。 (2)我们开发了一种波形发生器，可以合成施加到样品上的多频率电场波形。从计算机传输来的波形数据存储在发生器的存储单元中，然后根据计算机选择的时钟脉冲序列转换为模拟信号。（3）构建了宽带电位移检测器并准备了用于测试测量的样品池。进一步开发了测量控制、光谱显示和数据分析的计算机软件。(4)利用光谱仪观察了铁电VDF-TrFE共聚物在极化反转过程中高频介电弛豫光谱的变化。

项目成果

Yasuyuki Kimura: Review of Scientific Instruments.

木村康幸：科学仪器评论。

Iwao Teraoka: Japanese Journal of Applied Physics.

寺冈岩男：日本应用物理学杂志。

Yasuyuki,Kimura: "Development of Real-Time Dielectric Relaxation Spectrometer by Using Hardware Logic" Review of Scientific Instruments.

Yasuyuki,Kimura：“利用硬件逻辑开发实时介电弛豫谱仪”科学仪器综述。

Iwao,Teraoka: "Real-Time Spectroscopy of High-Frequency Dielectric Relaxation in VDF-TrFE Copolymer during Polarization Reversal Process" Japanese Journal of Applied Physics.

Iwao,Teraoka：“极化反转过程中 VDF-TrFE 共聚物高频介电弛豫的实时光谱”日本应用物理学杂志。