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System for automatically measuring material pyroelectric performance under extreme condition

A technology for automatic measurement and extreme conditions, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem that the expansion function option does not have the pyroelectric measurement function, etc., to achieve a high degree of automation, convenient use and operation, and technical reliable effect

Inactive Publication Date: 2015-09-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is reported in the "Comprehensive Physical Property Measurement System (PPMS) Simple Product Instruction Manual, Quantum Design Company of the United States" that PPMS itself has most of the conventional physical property measurement functions, but its extended function options do not have the pyroelectric measurement function

Method used

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  • System for automatically measuring material pyroelectric performance under extreme condition
  • System for automatically measuring material pyroelectric performance under extreme condition
  • System for automatically measuring material pyroelectric performance under extreme condition

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0022] see figure 1 and figure 2 , the system for automatically measuring the pyroelectric properties of materials under extreme conditions includes a comprehensive physical property measurement system (1), an electrometer (4), a microcomputer terminal (3), and a switch part (2). It is characterized in that: the microcomputer terminal (3) is connected with the comprehensive physical property measurement system (1) and the electrometer (4) through the GPIB interface bus, and connected with the switch part (2) through the USB-RS232 interface, and the switch part (2) It is also connected with the electrometer (4) and the comprehensive physical property measurement system (1). Electrometer (4) provides applied voltage and test pyroelectric current operation.

Embodiment 2

[0024] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0025] The switch part (2) includes two double-pole double-throw relays (RL1, RL2), a single-chip microcomputer (STC89C52), an L293D quadruple high-current H-bridge driver, and a 9V DC switching power supply. First burn the debugged single-chip program into the single-chip computer, and the microcomputer terminal can control the L293D quadruple high-current H-bridge drive through the single-chip computer to control the pull-in of the relay, so as to realize different operations in testing, voltage application polarization, and short-circuit discharge switch between them at will.

[0026] The system for automatically measuring pyroelectric properties of materials under extreme conditions is characterized in that: the comprehensive physical property measurement system (1) adopts PPMS-9 type, and the electrometer adopts Keithley 6517B type.

[0027] The operation method of th...

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Abstract

The present invention relates to a system for automatically measuring material pyroelectric performance under an extreme condition. The system comprises an physics property measurement system (PPMS), an electrometer (KEITHLEY 6517B), a microcomputer terminal, and a switch part. The switch part comprises two double-pole double-throw relays, a single chip microcomputer (STC89C52), a L293D quadruple high-current H-bridge driver, and a 9V DC switching power supply. Firstly a debugged microcontroller is program is burned into the single chip microcomputer, the microcomputer terminal can control the L293D quadruple high-current H-bridge driver through the single chip microcomputer to control the switch-on of the relays, and thus the arbitrarily switch among testing, voltage apply polarization and short circuit discharge operations is realized. According to the system, the manual wire connection in discharge and a test can be overcome, and the whole testing process is completely automated.

Description

Technical field [0001] The invention relates to an automatic testing system for physical properties, in particular to a system for measuring pyroelectric properties of materials under extreme conditions. Background technique [0002] Magnetic and ferroelectric materials are widely used in modern science and technology. Ferromagnetic materials have a spontaneous magnetic moment, and they can be flipped (switched) in response to changes in an external magnetic field, enabling information storage. Ferroelectric materials have a spontaneous electrical polarization that can be flipped (switched) in response to an applied electric field. Compared with currently widely used memories, ferroelectric random access memory (FeRAM) based on ferroelectric materials has the advantages of non-volatility and fast read speed, so it also has great application prospects. Therefore, whether it is mechanism research or device characterization, the characterization of multiferroics is essential....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 曹义明康保娟冯振杰崔晓鹏张金仓曹世勋
Owner SHANGHAI UNIV