阅读说明：本技术 用于电化学驱动的驱动测试装置及驱动测试方法 (Driving test device and driving test method for electrochemical driving ) 是由 邸江涛 王玉莲 李清文 于 2020-03-17 设计创作，主要内容包括：本发明公开了一种用于电化学驱动的驱动测试装置及驱动测试方法。该驱动测试装置包括：电化学系统,其包括信号施加装置、工作电极、对电极、参比电极以及电解质,其中,所述工作电极为待测人工肌肉纤维；测试系统,其包括载荷和数据采集装置,所述载荷设置在电解质外部,且所述载荷与所述工作电极连接,并能够在所述工作电极的驱使下运动,所述数据采集装置用于将所述载荷的位移变化信息以电压信号的形式输出并存储。本发明提供的驱动测试装置通过非接触位移传感器监测载荷的位移变化信息,进而实现对工作电极驱动信号的采集,且载荷外置,不存在被电解质液腐蚀的危险,使得该驱动测试装置更加安全。(The invention discloses a drive test device and a drive test method for electrochemical drive. The drive test apparatus includes: the electrochemical system comprises a signal applying device, a working electrode, a counter electrode, a reference electrode and electrolyte, wherein the working electrode is artificial muscle fiber to be detected; the test system comprises a load and a data acquisition device, wherein the load is arranged outside the electrolyte, is connected with the working electrode and can move under the driving of the working electrode, and the data acquisition device is used for outputting and storing displacement change information of the load in the form of voltage signals. The driving test device provided by the invention monitors the displacement change information of the load through the non-contact displacement sensor, so that the collection of the driving signal of the working electrode is realized, and the load is external, so that the danger of corrosion by electrolyte liquid does not exist, and the driving test device is safer.)

1. A drive test apparatus for electrochemical driving, characterized by comprising:

the electrochemical system comprises a signal applying device, a working electrode, a counter electrode, a reference electrode and an electrolyte, wherein one end of the working electrode, one end of the counter electrode and one end of the reference electrode are arranged in the electrolyte, the other end of the working electrode, the other end of the counter electrode and the other end of the reference electrode are electrically connected with the signal applying device, the signal applying device is used for applying electrochemical signals to the working electrode, the counter electrode and the reference electrode, and the working electrode is artificial muscle fibers to be tested;

the test system comprises a load and a data acquisition device, wherein the load is arranged outside the electrolyte, is connected with the working electrode and can move under the driving of the working electrode, and the data acquisition device is used for outputting and storing displacement change information of the load in the form of voltage signals.

2. The drive test device for electrochemical driving according to claim 1, characterized in that: the electrolyte is contained in a container, and the load is arranged outside the container, wherein the load is connected with the working electrode through a connecting wire; and/or the connecting wire is wound on the fixed pulley.

3. The drive test device for electrochemical driving according to claim 1, characterized in that: the data acquisition device comprises a displacement sensor and a data acquisition card, the data acquisition card is electrically connected with the displacement sensor, and the displacement sensor is used for measuring the displacement change information of the load and converting the displacement change information of the load into a voltage signal.

4. The drive test device for electrochemical driving according to claim 3, characterized in that: the displacement sensor is a non-contact displacement sensor.

5. The drive test device for electrochemical driving according to claim 1, characterized in that: the signal applying means comprises an electrochemical workstation.

6. The drive test device for electrochemical driving according to claim 1, characterized in that: the artificial muscle fiber comprises conductive fiber, and the conductive fiber comprises carbon nanotube fiber or carbon nanotube composite fiber.

7. The drive test device for electrochemical driving according to claim 1, characterized in that: the counter electrode comprises any one of a platinum sheet, a platinum net, a platinum wire, a platinum net with an activated carbon nanotube film in the middle and a carbon nanotube film with a platinum net in the middle; and/or the reference electrode comprises Ag/Ag⁺And an electrode.

8. The drive test device for electrochemical driving according to claim 1, characterized in that: the electrolyte comprises an inorganic electrolyte and an organic electrolyte, the inorganic electrolyte comprises a neutral electrolyte solution, an acidic electrolyte solution and an alkaline electrolyte solution, and the organic electrolyte comprises salts with cations of tetraethyl, tetrabutyl and tetrahexyl, salts with anions of tetrafluoroborate and hexafluorophosphate and a combination of any one or more of ionic liquids; and/or, the electrolyte comprises a fixed electrolyte or a liquid electrolyte.

9. A drive test method for electrochemical driving, characterized by comprising:

providing a drive test device for electrochemical driving according to any one of claims 1 to 8;

applying electrochemical signals to the working electrode, the counter electrode and the reference electrode by the signal applying device, wherein the working electrode converts the electrochemical signals into driving signals for driving the load to move;

the load moves under the driving of the working electrode, the displacement change information of the load is measured by the data acquisition device, and the displacement change information of the load is output and stored in the form of a voltage signal.

10. The drive test method for electrochemical driving according to claim 9, characterized in that: the electrochemical signal comprises any one of a square wave signal, a triangular signal and a sinusoidal signal.

Technical Field

The invention relates to an electrochemical driving test device, in particular to a driving test device and a driving test method for electrochemical driving, and belongs to the technical field of electrochemical performance testing.

Background

Artificial Muscle Fiber (Artificial Muscle Fiber) is a new type of intelligent driving material developed in recent years, can produce reversible movements in the forms of extension, rotation, bending and the like under the external stimulation, and has important application prospect in daily life, medical treatment, military and other aspects. The driving methods of artificial muscles can be divided into three major categories, namely electrothermal driving, solvent/gas adsorption and desorption driving, and electrochemical driving. The electrothermal drive is that the volume of muscle fiber is expanded due to joule heat generated by current, so that reversible torsion and telescopic drive are formed, but the frequency is limited slowly by temperature change, and the carnot cycle efficiency is very low under the influence of a thermal effect; the adsorption and desorption driving of the solvent/gas is formed by utilizing the expansion of the volume caused by the adsorption of the solvent and gas molecules in the material, and the driving is greatly influenced by the environment, the driving frequency is low, and the response time is long.

Compared with the two driving modes, the electrochemical driving is mainly formed by the fact that solvating ions in electrolytes migrate to the inside of highly porous muscle fibers to cause the fiber volume to expand, the driving mode is easy to control, the required control voltage is low (within 5V, namely within the electrochemical decomposition voltage of the solvent), the heat effect is negligible, and the driving mode is more in accordance with the muscle of a living body in form, so that the driving mode is more advantageous. Based on this, research is conducted on the electrochemical driven artificial muscle fiber, and at present, the electrochemical driven artificial muscle fiber can be mainly divided into two categories, one is in a liquid environment, and the other is assembled into an all-solid state. The current electrochemical device places the whole testing device in a liquid electrolyte environment, wherein the liquid electrolyte environment contains acid, alkali and organic substances, which may cause certain corrosion to a load or contact organic toxic substances, thus being unfavorable for human body; data acquisition is performed by adopting a high-speed camera shooting mode, which is not only large in data volume, long in time consumption and large in error, but also cannot output a driving signal in real time along with the change of an electrochemical signal, so that an electrochemical driving device needs to be improved urgently.

Disclosure of Invention

The present invention is directed to a driving test apparatus and a driving test method for electrochemical driving, which overcome the disadvantages of the prior art.

In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:

an aspect of an embodiment of the present invention provides a drive test apparatus for electrochemical driving, including:

the electrochemical system comprises a signal applying device, a working electrode, a counter electrode, a reference electrode and an electrolyte, wherein one end of the working electrode, one end of the counter electrode and one end of the reference electrode are arranged in the electrolyte, the other end of the working electrode, the other end of the counter electrode and the other end of the reference electrode are electrically connected with the signal applying device, the signal applying device is used for applying electrochemical signals to the working electrode, the counter electrode and the reference electrode, and the working electrode is artificial muscle fibers to be tested;

the test system comprises a load and a data acquisition device, wherein the load is arranged outside the electrolyte, is connected with the working electrode and can move under the driving of the working electrode, and the data acquisition device is used for outputting and storing displacement change information of the load in the form of voltage signals.

Further, the electrolyte is contained in a container, and the load is disposed outside the container, wherein the load is connected to the working electrode through a connection line.

Further, the connecting line is wound on the fixed pulley.

Furthermore, the data acquisition device comprises a displacement sensor and a data acquisition card, the data acquisition card is electrically connected with the displacement sensor, and the displacement sensor is used for measuring the displacement change information of the load and converting the displacement change information of the load into a voltage signal.

Further, the displacement sensor is a non-contact displacement sensor.

Further, the signal applying device includes an electrochemical workstation.

Further, the artificial muscle fiber comprises a conductive fiber, and the conductive fiber comprises a carbon nanotube fiber or a carbon nanotube composite fiber.

Further, the counter electrode comprises any one of a platinum sheet, a platinum net, a platinum wire, a platinum net with an activated carbon nanotube film sandwiched in the middle, and a carbon nanotube film with a platinum net sandwiched in the middle.

Further, the reference electrode comprises Ag/Ag⁺And an electrode.

Further, the electrolyte comprises an inorganic electrolyte and an organic electrolyte, the inorganic electrolyte comprises a neutral electrolyte liquid, an acidic electrolyte liquid and an alkaline electrolyte liquid, and the organic electrolyte comprises salts with cations of tetraethyl, tetrabutyl and tetrahexyl, salts with anions of tetrafluoroborate and hexafluorophosphate and a combination of any one or more of ionic liquids.

Further, the electrolyte includes a fixed electrolyte or a liquid electrolyte.

The embodiment of the invention also provides a driving test method for electrochemical driving, which comprises the following steps:

providing said drive test means for electrochemical driving;

applying electrochemical signals to the working electrode, the counter electrode and the reference electrode by the signal applying device;

applying electrochemical signals to the working electrode, the counter electrode and the reference electrode by the signal applying device, wherein the working electrode converts the electrochemical signals into driving signals for driving the load to move;

the load moves under the driving of the working electrode, the displacement change information of the load is measured by the data acquisition device, and the displacement change information of the load is output and stored in the form of a voltage signal.

Further, the electrochemical signal includes any one of a square wave signal, a triangular signal and a sinusoidal signal.

Compared with the prior art, the driving test device for electrochemical driving provided by the embodiment of the invention is safe, convenient and efficient, can display the driving change in real time, and realizes the real-time output of an electrochemical signal and a driving signal; the driving test device for electrochemical driving provided by the invention monitors the displacement change information of the load through the non-contact displacement sensor, so as to further realize the acquisition of the driving signal of the working electrode; in addition, the load of the driving test device is externally arranged outside the electrolyte and the three-electrode system, so that the driving test device is not corroded by electrolyte liquid, the driving test device is safer, and the load can be replaced more conveniently and efficiently.

Drawings

FIG. 1 is a schematic diagram of a drive test apparatus for electrochemical drive according to an exemplary embodiment of the present invention;

FIG. 2 is a schematic flow chart of a method for electrochemical-driven drive testing in an exemplary embodiment of the invention;

FIG. 3 is a graph showing the variation in the driving amount of artificial muscle fiber with time in real time when the applied signal is a square wave voltage in example 1 of the present invention;

FIG. 4 is a graph showing the variation of the driving amount of artificial muscle fiber with time in real time when the applied signal is a triangular wave voltage in example 2 of the present invention;

FIG. 5 is a graph showing the variation of the contraction distance of the artificial muscle fiber with time in real time when square wave signals of different voltages are applied in example 3 of the present invention;

fig. 6 is a graph showing the variation of the contraction distance of the artificial muscle fiber with time in real time when square wave signals of different frequencies are applied in example 4 of the present invention.

Detailed Description

In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.

Referring to fig. 1, a driving test device for electrochemical driving mainly comprises a working system, a signal applying device and a test system, wherein the working system and the signal applying device form the electrochemical system;

wherein, the working system comprises an electrolyte 1, a working electrode 2, a counter electrode 3 and a reference electrode 4, and one of the four electrodes is not available; the signal applying means includes a signal input recorder (i.e., electrochemical workstation) 10 for applying various electrochemical signals such as a square wave signal and a triangular wave signal; one end of the working electrode 2, the counter electrode 3 and the reference electrode 4 is immersed in the electrolyte, and the other end is connected with a signal input recorder (electrochemical workstation) 10 through a data line, and is used for receiving various signals transmitted by the electrochemical workstation 10, such as voltage, current and the like;

the test system comprises a load 6, a non-contact displacement sensor 7, a data acquisition card 8 and a computer 9, wherein the data acquisition card 8 is respectively connected with the non-contact displacement sensor 7 and the computer 9, the load 6 is connected with the working electrode 2 through a connecting wire and can synchronously move with the working electrode under the driving of the working electrode 2, and the non-contact displacement sensor 7 is electrically connected with the data acquisition card 8 and is used for monitoring displacement change information of the load 6, converting the displacement change information into a voltage signal and further transmitting the voltage signal to the data acquisition card for storage.

Specifically, the electrolyte 1 is contained in a container, the load 6 is disposed outside the container, and at least one fixed pulley is further disposed between the load 6 and the working electrode 2, and a connection line for connecting the load 6 and the working electrode 2 is wound on the fixed pulley 5.

Specifically, the working electrode 2 is an artificial muscle fiber to be measured, the artificial muscle fiber comprises a conductive fiber, the conductive fiber comprises a carbon nanotube fiber or a carbon nanotube composite fiber, the counter electrode comprises any one of a platinum sheet, a platinum net, a platinum wire, a platinum net with an activated carbon nanotube film in the middle and a carbon nanotube film with a platinum net in the middle, and the reference electrode comprises Ag/Ag⁺An electrode; specifically, the electrolyte may be a fixed electrolyte or a liquid electrolyte; preferably, the electrolyte includes an inorganic electrolyte and an organic electrolyte,the inorganic electrolyte includes a neutral electrolyte, an acidic electrolyte and an alkaline electrolyte, and the organic electrolyte includes a salt having a cation of tetraethyl, tetrabutyl or tetrahexyl, a salt having an anion of tetrafluoroborate or hexafluorophosphate, and an ionic liquid, but is not limited thereto.

Specifically, referring to fig. 1 and 2, a driving test method for electrochemical driving includes the following steps:

1) providing a driving test device for electrochemical driving as shown in fig. 1, taking an artificial muscle fiber to be tested as a working electrode 2, leading the artificial muscle fiber to be tested out of a container for accommodating electrolyte and the working electrode by using a thin wire (namely the connecting wire), connecting the thin wire to a load 6 through a plurality of fixed pulleys 5, preparing a counter electrode 3 and a reference electrode 4 at the same time, forming a three-electrode system together with the working electrode, placing the three-electrode system in an electrolyte solution 1, and connecting one end of the working electrode, one end of the counter electrode and one end of the reference electrode with an electrochemical workstation 10 through a special data wire;

2) different forms of electrochemical signals are applied to a three-electrode system (a working electrode, a counter electrode and a reference electrode which are placed in electrolyte liquid) by an electrochemical workstation 10;

3) and (3) collecting and recording a driving signal by using a test system: connecting and debugging the non-contact displacement sensor 7 and the data acquisition card 8, and acquiring displacement change information acquired by the non-contact displacement sensor 7 on a computer 9 in a voltage signal mode;

4) opening the data acquisition card 8 while applying signals to the electrochemical workstation 10, so that the driving signals and the electrochemical signals are synchronously output;

5) the data obtained by the electrochemical workstation and the data obtained by the data acquisition card are stored, and corresponding research of electrochemical driving can be carried out according to different output signal places of the electrochemical workstation.