Digital innovative ferroelectric hysteresis loop tester

Abstract

The utility model relates to the field of performance testing, and discloses a digital innovative ferroelectric hysteresis loop tester, which comprises a ferroelectric hysteresis loop testing unit, a signal generator, a signal acquisition unit and an interaction machine, the signal acquisition unit is electrically connected with the ferroelectric hysteresis loop test unit; the signal generator is electrically connected with the ferroelectric hysteresis loop unit; the interaction machine is electrically connected with the signal acquisition unit; a signal generated by the signal generator flows through the ferroelectric hysteresis loop test unit and generates a ferroelectric hysteresis loop effect on the ferroelectric hysteresis loop test unit, the signal acquisition unit acquires an electric signal of the ferroelectric hysteresis loop test unit, transmits the electric signal to the interaction machine, outputs a digital waveform image and displays the ferroelectric hysteresis loop effect; according to the utility model, self-adaptive integration of testing, processing and displaying is realized, the system integration degree is high, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of performance testing, and in particular to a digital innovative hysteresis loop tester. Background Technology

[0002] Ferroelectric thin film materials have wide applications in electricity, optics, heat, and acoustics, making the accurate measurement of their electrical properties crucial. However, current hysteresis loop testing instruments for ferroelectric materials on the market, both domestically and internationally, are generally expensive, feature-overkill, and complex to operate, making them unsuitable for undergraduate teaching and small to medium-sized laboratory environments. Utility Model Content

[0003] The purpose of this invention is to propose a digital innovative hysteresis loop tester to solve the technical problems of high price, complex operation and poor versatility of current hysteresis loop testers for ferroelectric materials.

[0004] Specifically, this utility model provides a digital innovative hysteresis loop tester, comprising:

[0005] Hysteresis loop test unit, signal generator, signal acquisition unit, and interactive unit;

[0006] The signal acquisition unit is electrically connected to the hysteresis loop test unit;

[0007] The signal generator is electrically connected to the hysteresis loop test unit;

[0008] The interactive unit is electrically connected to the signal acquisition unit;

[0009] The signal generated by the signal generator flows through the hysteresis loop test unit and generates a hysteresis loop effect on the hysteresis loop test unit. The signal acquisition unit acquires the electrical signal of the hysteresis loop test unit, transmits it to the interactive unit, outputs a digitized waveform image and displays the hysteresis loop effect.

[0010] Furthermore, the hysteresis loop test unit is placed on a three-dimensional adjustable probe platform.

[0011] Furthermore, the hysteresis loop test unit is electrically connected to the probe on the three-dimensional adjustable probe platform.

[0012] Furthermore, the hysteresis loop test unit is made of ferroelectric thin film material.

[0013] Furthermore, the signal generator is an AC signal source.

[0014] Furthermore, the signal acquisition unit includes a data acquisition card, which outputs a numerical signal from the measured analog signal.

[0015] Furthermore, the interactive device includes a display screen and a keyboard.

[0016] Furthermore, the parameters of the hysteresis loop test unit are input via the keyboard, and the results are displayed on the screen.

[0017] The beneficial effects provided by this utility model are:

[0018] (1) The hysteresis loop effect is more intuitive and reflects the physical process more clearly and comprehensively; (2) It realizes the adaptive integration of testing, processing and display, and the system integration is high; (3) The experimental phenomena are obvious, the demonstration and detection content is comprehensive, the accuracy is reliable, the resolution is high, and it can be applied to observation and detection in actual situations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] in:

[0021] 1-Box, 2-Signal generator, 3-Interactive machine, 4-Signal acquisition unit, 5-Hysteresis loop test unit, 6-Display screen, 7-Keyboard, 8-Three-dimensional adjustable probe station.

[0022] Figure 2 This is a schematic diagram of the proportional sampling attenuation circuit and the Zener diode protection circuit of this utility model.

[0023] Figure 3 This is a schematic diagram of the hysteresis loop test circuit unit of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0025] Before formally describing this utility model, a general description of the solution will be given first to facilitate understanding.

[0026] Please refer to Figure 1 This utility model provides a digital innovative hysteresis loop tester, comprising:

[0027] Hysteresis loop test unit 5, signal generator 2, signal acquisition unit 4, and interactive unit 3;

[0028] The signal acquisition unit 4 is electrically connected to the hysteresis loop test unit 5;

[0029] The signal generator 2 is electrically connected to the hysteresis loop test unit 5;

[0030] The interactive unit 3 is electrically connected to the signal acquisition unit 4;

[0031] The signal generated by the signal generator 2 flows through the hysteresis loop test unit 5 and generates a hysteresis loop effect on the hysteresis loop test unit 5. The signal acquisition unit 4 acquires the electrical signal of the hysteresis loop test unit 5, transmits it to the interactive unit 3, outputs a digitized waveform image and displays the hysteresis loop effect.

[0032] It should be noted that the interior of the housing 1 is equipped with a signal acquisition unit 4 and a three-dimensional adjustable probe station 8 electrically connected to the signal generator 2.

[0033] It should be noted that the hysteresis loop test unit 5 is a ferroelectric thin film material with good conductivity and a significant hysteresis loop effect. Specifically, a relatively stable ferroelectric material is connected in series with a standard capacitor in the circuit.

[0034] It should be noted that the hysteresis loop test unit 5 is placed on the three-dimensional adjustable probe platform 8, and the hysteresis loop test unit 5 is electrically connected to the probe on the three-dimensional adjustable probe platform 8.

[0035] The signal generator 2 is an AC signal source that converts discrete digital signals into continuously changing analog electrical signals, which create stable input conditions for the signal acquisition unit 4.

[0036] The signal generator 2 includes a microcontroller, a DAC8043U chip, and a high-voltage operational amplifier circuit. The microcontroller drives the DAC chip to perform digital-to-analog conversion, converting the digital signal into analog electrical signals. The high-voltage operational amplifier circuit amplifies the weak input signal to the required amplitude value, ensuring that the signal's variation pattern matches that of the original input signal.

[0037] It should be noted that the signal acquisition unit includes a data acquisition card, which outputs the measured analog signal as a numerical signal.

[0038] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the proportional sampling attenuation circuit and the Zener diode protection circuit of this utility model. In this utility model, the front end of the signal acquisition unit 4 includes a proportional attenuation sampling circuit and a Zener diode protection circuit composed of high-precision resistors connected in series. The signal acquisition unit is a dual-channel signal that is proportionally reduced by an attenuator composed of high-precision resistors connected in series, and then acquired by the data acquisition card after passing through the Zener diode protection circuit.

[0039] In this invention, a USB2DAQ data acquisition card is specifically used to convert the measured electrical signals into digital signals.

[0040] It should be noted that the interactive device includes a display screen 6 and a keyboard 7. The sampling rate, sampling channels, and other hysteresis loop test unit parameters are input via the keyboard, and the results are displayed on the display screen.

[0041] Operators can manually operate the interactive unit 3, inputting corresponding operations via the keyboard 7, such as adjusting the sampling range and sampling frequency, and displaying and viewing the results on the display screen 6. The display screen 6 is an LCD screen.

[0042] It should be noted that the parameter input, signal acquisition, and processing in this utility model are all accomplished by the functions of the signal generator and signal acquisition unit (acquisition card) themselves, and do not involve any improvement process to the method.

[0043] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the hysteresis loop test circuit unit of this utility model; it should be noted that the hysteresis loop test circuit unit is a charge sampling circuit improved from the traditional Sawyer-Tower circuit, which is a ferroelectric material connected in series with a standard capacitor.

[0044] The workflow of this utility model is as follows:

[0045] The hysteresis loop test unit 5 uses a ferroelectric material sample connected in series with a standard capacitor in the circuit. The signal generator 2 applies AC signals of different frequencies to both ends of the hysteresis loop test unit 5. Then, the signal acquisition unit 4 acquires the dual-channel electrical signals of the hysteresis loop characteristics of the hysteresis loop test unit 5 and displays them on the display unit 6, thereby showing the hysteresis loop effect.

[0046] The operator can generate an internally amplified high-voltage signal by operating the button of the signal generator 2. The alternating current flows through the three-dimensional adjustable probe station 8 and reaches the electrically connected hysteresis loop test circuit unit 5, generating a hysteresis loop effect on the surface of the hysteresis loop test circuit unit 5. The dual electrical signals of the hysteresis loop effect are received by the signal acquisition unit 4 and reflected as dual digital signals to display a composite Liszt graph on the display screen 6.

[0047] The beneficial effects of this utility model are:

[0048] (1) The hysteresis loop effect is more intuitive and reflects the physical process more clearly and comprehensively; (2) It realizes the adaptive integration of testing, processing and display, and the system integration is high; (3) The experimental phenomena are obvious, the demonstration and detection content is comprehensive, the accuracy is reliable, the resolution is high, and it can be applied to observation and detection in actual situations.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A digital innovative hysteresis loop tester, characterized in that: include: Hysteresis loop test unit, signal generator, signal acquisition unit, and interactive unit; The signal acquisition unit is electrically connected to the hysteresis loop test unit; The signal generator is electrically connected to the hysteresis loop test unit; The interactive unit is electrically connected to the signal acquisition unit; The signal generated by the signal generator flows through the hysteresis loop test unit and generates a hysteresis loop effect on the hysteresis loop test unit. The signal acquisition unit acquires the electrical signal of the hysteresis loop test unit, transmits it to the interactive unit, outputs a digitized waveform image and displays the hysteresis loop effect.

2. The digital innovative hysteresis loop tester as described in claim 1, characterized in that: The hysteresis loop test unit is placed on a three-dimensional adjustable probe platform.

3. The digital innovative hysteresis loop tester as described in claim 2, characterized in that: The hysteresis loop test unit is electrically connected to the probe on the three-dimensional adjustable probe platform.

4. The digital innovative hysteresis loop tester as described in claim 1, characterized in that: The hysteresis loop test unit is made of ferroelectric thin film material.

5. The digital innovative hysteresis loop tester as described in claim 1, characterized in that: The signal generator is an AC signal source.

6. The digital innovative hysteresis loop tester as described in claim 1, characterized in that: The signal acquisition unit includes a data acquisition card, which outputs a numerical signal from the measured analog signal.

7. The digital innovative hysteresis loop tester as described in claim 1, characterized in that: The interactive device includes a display screen and a keyboard.

8. The digital innovative hysteresis loop tester as described in claim 7, characterized in that: The parameters of the hysteresis loop test unit are input via the keyboard, and the results are displayed on the screen.

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