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.

这项研究中开发的实时介电松弛光谱仪由波形发生器，电位移探测器，波形分析仪和个人计算机作为系统控制器组成。该研究的摘要如下：（1）我们开发了一个波形分析仪，该波形分析仪通过使用超快速的ECL栅极阵列同时解码所有频率组件，该波形分析仪对WALSH-HADAMARD转换进行并行处理，所有频率成分都是电位置换的多频率响应。从计算机传输的波形数据存储在发电机的存储单元中，然后根据计算机选择的时钟脉冲序列将其转换为模拟信号。（3）我们构建了一个宽带电气位移检测器，并准备了测试测量的样品单元。此外，我们开发了用于测量控制，频谱显示和数据分析的计算机软件。（4）通过使用光谱仪，我们观察到了极化逆转过程中铁电VDF-TRFE共聚物的高频二元脱节弛豫光谱的变化。

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。