Electrode clamp device and control method

Abstract

The present invention discloses an electrode clamp device and a control method. The electrode clamp device is applied to experiments of the injection current thermoacoustic imaging method, and comprises: an electrode clamp, a first guide rail module, a second guide rail module, a clamp linkage structure and an experimental signal providing unit; the electrode clamp is mounted on the second guide rail module and moves along the extension direction of the second guide rail module, and the electrode clamp is used to clamp the experimental sample; the clamp linkage structure is mounted on the first guide rail module and moves along the extension direction of the first guide rail module, and the clamp linkage structure is used to drive the electrode clamp to move; the extension directions of the first guide rail module and the second guide rail module are not perpendicular to each other; the experimental signal providing unit is electrically connected to the electrode clamp and is used to provide the electrode clamp with an experimental current signal. The technical solution of the embodiment of the present invention replaces the manual clamping of the experimental sample, realizes the automatic clamping of the experimental sample, and can provide the experimental signal required for the experiment.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of medical functional imaging, and in particular to an electrode clamp device and a control method thereof. Background Art

[0002] The injection current imaging method is of great significance for imaging electrical properties and monitoring the physiological and pathological status of tissues.

[0003] In thermoacoustic testing, current needs to be applied to the test sample through electrodes. Conventional methods typically use manual operation to clamp the test sample with electrodes and apply current. However, manual clamping of the test sample is difficult and can easily damage the sample.

[0004] Based on this, designing a device that can automatically control the clamping of experimental samples and provide current to the experimental samples has become an urgent problem to be solved in the industry. Summary of the Invention

[0005] The present invention provides an electrode clamp device and a control method for automatically controlling the clamping of an experimental sample and providing current to the experimental sample.

[0006] According to one aspect of the present invention, an electrode fixture device is provided, which is applied to experiments of injection current thermoacoustic imaging methods. The device comprises: an electrode fixture, a first guide rail module, a second guide rail module, a fixture linkage structure, and an experimental signal providing unit;

[0007] The electrode fixture is installed on the second guide rail module and moves along the extension direction of the second guide rail module. The electrode fixture is used to clamp the experimental sample;

[0008] The clamp linkage structure is installed on the first guide rail module and moves along the extension direction of the first guide rail module, and the clamp linkage structure is used to drive the electrode clamp to move;

[0009] The extension directions of the first guide rail module and the second guide rail module are not perpendicular to each other;

[0010] The experimental signal providing unit is electrically connected to the electrode fixture and is used to provide an experimental current signal to the electrode fixture.

[0011] Optionally, the electrode fixture includes a first electrode fixture and a second electrode fixture; the first electrode fixture and the second electrode fixture move in opposite directions.

[0012] Optionally, the first electrode fixture includes a first electrode holder and a first electrode, and the second electrode fixture includes a second electrode holder and a second electrode;

[0013] The first electrode is fixed on the first electrode seat, the second electrode is fixed on the second electrode seat, and the first electrode seat and the second electrode seat are installed on the second guide rail module.

[0014] Optionally, the fixture linkage structure includes: a magnetic unit and a motion controller;

[0015] The magnetic unit is arranged on the first guide rail module and moves along the extension direction of the first guide rail module;

[0016] The motion controller is electrically connected to the first guide rail module and is used for driving the first guide rail module to rotate.

[0017] Optionally, the magnetic unit includes: a first electromagnet, a second electromagnet, and the electrode clamp device further includes a magnet power supply;

[0018] The first electromagnet and the second electromagnet are arranged on the first guide rail module. The magnet power supply is electrically connected to the first electromagnet and the second electromagnet to provide electrical energy to the first electromagnet and the second electromagnet so that the first electromagnet and the second electromagnet generate magnetic force.

[0019] Optionally, the device further comprises: a pressure sensor;

[0020] The pressure sensors include at least two, which are respectively arranged on the opposite inner sides of the first electrode seat and the second electrode seat. The pressure sensors are used to measure the pressure between the first electrode and the experimental sample and the pressure between the second electrode and the experimental sample.

[0021] Optionally, the device further comprises: an impedance tester;

[0022] Two ends of the impedance tester are electrically connected to the first electrode and the second electrode respectively, and the impedance tester is used to measure the electrical impedance value between the first electrode and the second electrode.

[0023] Optionally, the device further comprises: a first optical switch and a second optical switch;

[0024] The first optical switches include at least two and are arranged at the center of the first guide rail module; the second optical switches include at least two and are arranged at the center of the second guide rail module;

[0025] The first optical switch is used to measure the distance between the first optical switch and the first electromagnet, and the second optical switch is used to measure the distance between the second optical switch and the first electrode base; or

[0026] The first optical switch is used to measure the distance between the first optical switch and the second electromagnet, and the second optical switch is used to measure the distance between the second optical switch and the second electrode base.

[0027] According to another aspect of the present invention, there is provided a method for controlling the electrode fixture device according to the first aspect, the method comprising:

[0028] The clamp linkage structure drives the first guide rail module to rotate, the clamp linkage structure moves axially on the first guide rail module, and the clamp linkage structure drives the electrode clamp to move axially on the second guide rail module;

[0029] The electrode fixture holds the experimental sample;

[0030] The experimental signal providing unit provides an experimental current signal to the electrode fixture.

[0031] Optionally, the electrode fixture device further includes an impedance tester, and before the experimental signal providing unit provides the experimental current signal to the electrode fixture, further includes:

[0032] The impedance tester measures the electrical impedance value between the first electrode and the second electrode.

[0033] The technical solution of the embodiment of the present invention is to set a first guide rail module and a second guide rail module whose extension directions are not perpendicular to each other, and the clamp linkage structure is installed on the first guide rail module, and the electrode clamp is installed on the second guide rail module. When the electrode clamp device is in operation, the first guide rail module rotates to drive the clamp linkage structure set on the first guide rail module to move, so that the clamp linkage structure drives the electrode clamp to move together on the second guide rail module. Compared with the method of manually clamping the experimental sample in the prior art, the electrode clamp device provided in this embodiment realizes automatic control clamping of the experimental sample and automatic control end clamping. In addition, the electrode clamp device provided in this embodiment is also electrically connected to the electrode clamp by setting an experimental signal providing unit. The experimental signal providing unit outputs the experimental current signal and transmits it to the experimental sample through the electrode clamp to meet the experimental needs.

[0034] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 is a structural schematic diagram of an electrode clamp device provided according to an embodiment of the present invention;

[0037] Figure 2 is a structural schematic diagram of another electrode clamp device provided according to an embodiment of the present invention;

[0038] Figure 3 is a structural schematic diagram of another electrode clamp device provided according to an embodiment of the present invention;

[0039] Figure 4 is a structural schematic diagram of another electrode clamp device provided according to an embodiment of the present invention;

[0040] Figure 5 This is a flow chart of a control method for an electrode clamp device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] An embodiment of the present invention provides an electrode clamp device. Figure 1 Schematic diagram of the structure of an electrode fixture provided by an embodiment of the present invention. The electrode fixture is suitable for experiments using an injection current thermoacoustic imaging method. Figure 1 As shown, the electrode fixture device includes: an electrode fixture 10, a first guide rail module 20, a second guide rail module 30, a fixture linkage structure 40 and an experimental signal providing unit 50.

[0044] The electrode fixture 10 is mounted on the second guide rail module 30 and moves along the extension direction of the second guide rail module 30. The electrode fixture 10 is used to clamp the experimental sample. The fixture linkage structure 40 is mounted on the first guide rail module 20 and moves along the extension direction of the first guide rail module 20. The fixture linkage structure 40 is used to drive the movement of the electrode fixture 10. The extension directions of the first guide rail module 20 and the second guide rail module 30 are not perpendicular to each other. The experimental signal providing unit 50 is electrically connected to the electrode fixture 10 and is used to provide the electrode fixture 10 with an experimental current signal.

[0045] Specifically, the electrode clamp device is used in experiments using the injection current thermoacoustic imaging method to automatically clamp the experimental sample. The electrode clamp 10 can move along the extension direction of the second guide rail module 30. For example, the electrode clamp 10 can move toward the experimental sample and contact the experimental sample to clamp the experimental sample during the experiment; alternatively, the electrode clamp 10 can move away from the experimental sample and leave the experimental sample to terminate the clamping of the experimental sample after the experiment is completed and return the experimental device to its original position.

[0046] The clamp linkage structure 40 is provided on the first guide rail module 20 and can move along the extension direction of the first guide rail module 20. The clamp linkage structure 40 has a linkage effect and can drive the electrode clamp 10 provided on the second guide rail module 30 to move together. For example, the clamp linkage structure 40 can move along the extension direction of the first guide rail module 20 in the direction close to the experimental sample, and drive the electrode clamp 10 to approach and contact the experimental sample, completing the action of automatically clamping the experimental sample before the experiment; alternatively, the clamp linkage structure 40 can also move along the extension direction of the first guide rail module 20 in the direction away from the experimental sample, and drive the electrode clamp 10 away from the experimental sample, so as to return the experimental device to its original position after the experiment.

[0047] For example, the first guide rail module 20 and the second guide rail module 30 can both rotate about an axial direction, and the rotation of the guide rails themselves can transport the structure disposed on the guide rails along the guide rails' axial direction. For example, the first guide rail module 20 can use a CTX0602-50H-28 model guide rail, and the second guide rail module 30 can use a GGP30mm model guide rail. The first guide rail module 20 is used to drive the clamp linkage structure 40 to move on the first guide rail module 20, and the clamp linkage structure 40 drives the electrode clamp 10 to move on the second guide rail module 30.

[0048] Because the electrode fixture 10 needs to move axially along the second guide rail module 30 under the drive of the fixture linkage structure 40, the extension directions of the first guide rail module 20 and the second guide rail module 30 must not be perpendicular to each other. In other words, the first guide rail module 20 and the second guide rail module 30 can be extended at an angle less than 90°. Preferably, the first guide rail module 20 and the second guide rail module 30 can be extended in parallel, thereby greatly reducing the resistance when the fixture linkage structure 40 drives the electrode fixture 10 to move, thereby reducing energy consumption.

[0049] In current injection thermoacoustic imaging experiments, a specific current signal needs to be applied to the experimental sample. This current signal is provided by the experimental signal providing unit 50. The experimental signal providing unit 50 is electrically connected to the electrode fixture 10. At the beginning of the experiment, the electrode fixture 10 clamps the experimental sample and maintains good contact with the sample. The experimental signal providing unit 50 outputs the experimental current signal, which is transmitted to the experimental sample through the electrode fixture 10 to conduct the experiment.

[0050] The technical solution of this embodiment is to set a first guide rail module and a second guide rail module whose extension directions are not perpendicular to each other, and the clamp linkage structure is installed on the first guide rail module, and the electrode clamp is installed on the second guide rail module. When the electrode clamp device is in operation, the first guide rail module rotates to drive the clamp linkage structure set on the first guide rail module to move, so that the clamp linkage structure drives the electrode clamp to move together on the second guide rail module. Compared with the method of manually clamping the experimental sample in the prior art, the electrode clamp device provided in this embodiment realizes automatic control clamping of the experimental sample and automatic control end clamping. In addition, the electrode clamp device provided in this embodiment is also electrically connected to the electrode clamp by setting an experimental signal providing unit. The experimental signal providing unit outputs the experimental current signal and transmits it to the experimental sample through the electrode clamp to meet the experimental needs.

[0051] Optional, Figure 2 FIG. 1 is a structural diagram of another electrode fixture device provided by an embodiment of the present invention. Figure 2 As shown, the electrode holder 10 includes a first electrode holder 101 and a second electrode holder 102. The first electrode holder 101 and the second electrode holder 102 move in opposite directions.

[0052] Specifically, the electrode fixture 10 includes two sets of electrode fixtures: a first electrode fixture 101 and a second electrode fixture 102. The first electrode fixture 101 and the second electrode fixture 102 can gradually approach the left and right sides of the experimental sample, respectively, to automatically clamp the experimental sample. The first electrode fixture 101 is mounted on the first guide rail 301 of the second guide rail module 30, and the second electrode fixture 102 is mounted on the second guide rail 302 of the second guide rail module 30.

[0053] Because the electrode clamp device performs the actions of clamping and releasing the experimental sample during operation, the first electrode clamp 101 moves along the axial direction of the first guide rail 301, and the second electrode clamp 102 moves along the axial direction of the second guide rail 302. Therefore, the first electrode clamp 101 and the second electrode clamp 102 always move in opposite directions. For example, before the experiment begins, the first electrode clamp 101 and the second electrode clamp 102 move toward each other, gradually approaching the experimental sample to achieve clamping of the experimental sample; after the experiment ends, the first electrode clamp 101 and the second electrode clamp 102 move away from each other, gradually moving away from the experimental sample to release the experimental sample.

[0054] Optionally, based on the above embodiment, continue to refer to Figure 2 The first electrode fixture 101 includes a first electrode holder 1011 and a first electrode 1012 , and the second electrode fixture 102 includes a second electrode holder 1021 and a second electrode 1022 .

[0055] The first electrode 1012 is fixed on the first electrode holder 1011 , the second electrode 1022 is fixed on the second electrode holder 1021 , and the first electrode holder 1011 and the second electrode holder 1021 are installed on the second guide rail module 30 .

[0056] Specifically, the first electrode holder 1011 is disposed on the first guide rail 301 of the second guide rail module 30, and the second electrode holder 1021 is disposed on the second guide rail 302 of the second guide rail module 30. The first electrode holder 1011 is used to secure the first electrode 1012, and the second electrode holder 1021 is used to secure the second electrode 1022. In other words, the first electrode 1012 is driven by the first electrode holder 1011 to move along the axial direction of the second guide rail module 30; and the second electrode 1022 is driven by the second electrode holder 1021 to move along the axial direction of the second guide rail module 30.

[0057] In addition, the first electrode 1012 and the second electrode 1022 can be plate-shaped electrode plates, or electrodes of other shapes, such as rod-shaped electrode rods and / or needle-shaped electrode needles. For experimental samples of macroscopic size, the first electrode 1012 and the second electrode 1022 in this embodiment use electrode plates, which can increase the contact area between the first electrode 1012 and the second electrode 1022 and the experimental sample, so that the first electrode 1012 and the experimental sample and the second electrode 1022 and the experimental sample maintain good contact performance, thereby making the experimental results more accurate. For example, the first electrode 1012 and the second electrode 1022 can be made of 100mm*50mm*2mm copper plates to ensure good contact, and the experimental current signal can be loaded onto the experimental sample through the first electrode 1012 and the second electrode 1022.

[0058] Optional, Figure 3 FIG. 1 is a structural diagram of another electrode fixture device provided by an embodiment of the present invention. Figure 3 As shown, the clamp linkage structure 40 includes: a magnetic unit 401 and a motion controller 402;

[0059] The magnetic unit 401 is disposed on the first guide rail module 20 and moves along the extension direction of the first guide rail module 20;

[0060] The motion controller 402 is electrically connected to the first guide rail module 20 and is used to drive the first guide rail module 20 to rotate.

[0061] Specifically, the motion controller 402 is electrically connected to the first guide rail module 20 and can provide the power required for the rotation of the first guide rail module 20, thereby driving the first guide rail module 20 to rotate and drive the fixture linkage structure 40 to move on the first guide rail module 20. The motion controller 402 can be powered by electricity, i.e., a motor controller, which can be implemented using an FPGA (Field Programmable Gate Array) chip; it can also generate power using other forms of energy, for example, the motion controller 402 can also be a fuel controller.

[0062] The first guide rail module 20 is provided with a magnetic unit 401, which can generate a magnetic force to attract the electrode fixture 10 provided on the second guide rail module 30. The first electrode holder 1011 and the second electrode holder 1021 in the electrode fixture 10 are made of ferromagnetic material and can move along the second guide rail module 30 with the magnetic unit 401 under the magnetic force of the magnetic unit 401. In other words, when the motion controller 402 outputs a driving force to control the rotation of the first guide rail module 20, the magnetic unit 401 provided on the first guide rail module 20 moves along the axial direction of the first guide rail module 20. At the same time, the magnetic unit 401 generates a magnetic force, attracting the electrode fixture 10 to move along the axial direction of the second guide rail module 30.

[0063] Optionally, based on the above embodiment, continue to refer to Figure 3 The magnetic unit 401 includes: a first electromagnet 4011 and a second electromagnet 4012 , and the electrode clamp device also includes a magnet power supply 60 .

[0064] The first electromagnet 4011 and the second electromagnet 4012 are arranged on the first guide rail module 20, and the magnet power supply 60 is electrically connected to the first electromagnet 4011 and the second electromagnet 4012 to provide electrical energy to the first electromagnet 4011 and the second electromagnet 4012 so that the first electromagnet 4011 and the second electromagnet 4012 generate magnetic force.

[0065] Specifically, the magnetic unit 401 may include an electromagnet and / or a permanent magnet to generate a magnetic force to attract the electrode fixture 10 for joint movement, without limitation. In this embodiment, the magnetic unit 401 is illustratively an electromagnet, including a first electromagnet 4011 and a second electromagnet 4012. A magnet power supply 60 provided in the electrode fixture assembly provides electrical energy to the electromagnets. The first electromagnet 4011 and the second electromagnet 4012 may be KKP-40 electromagnets, and the magnet power supply 60 may be a BTF-25-5 power supply.

[0066] The magnet power supply 60 is electrically connected to the first electromagnet 4011 and the second electromagnet 4012, and outputs an electrical signal to the first electromagnet 4011 and the second electromagnet 4012, thereby controlling the first electromagnet 4011 and the second electromagnet 4012 to generate a magnetic force, thereby attracting the electrode clamp 10 to move simultaneously along the extension direction of the second guide rail module 30. Compared to the direct control of the movement of the first electrode clamp 101 and the second electrode clamp 102 by the motion controller 402, in this embodiment, the first electromagnet 4011 attracts the first electrode clamp 101 and the second electromagnet 4012 attracts the second electrode clamp 102 to move together, which can increase the safety of the automatic clamping of the experimental sample. When the first electrode clamp 101 and the second electrode clamp 102 are clamped too tightly and are about to damage the experimental sample, the magnet power supply 60 can be immediately turned off, and the first electrode clamp 101 and the second electrode clamp 102 stop moving, thereby protecting the experimental sample from being damaged.

[0067] Optional, Figure 4 FIG. 1 is a structural diagram of another electrode fixture device provided by an embodiment of the present invention. Figure 4 As shown, the electrode fixture device further includes: a pressure sensor 70. The pressure sensors 70 include at least two, which are respectively arranged on the inner side surfaces of the first electrode holder 1011 and the second electrode holder 1021. The pressure sensors 70 are used to measure the pressure between the first electrode 1012 and the experimental sample 110 and the pressure between the second electrode 1022 and the experimental sample 110.

[0068] Specifically, during the process of the electrode clamping device clamping the experimental sample 110, the pressure sensor 70 can be used to determine whether the first electrode 1012 and the second electrode 1022 are pressing the experimental sample 110. The pressure sensors 70 include at least two, one disposed on the inner side surface of the first electrode holder 1011 and one on the inner side surface of the second electrode holder 1021, with the two pressure sensors 70 facing each other. The pressure sensors 70 may also include multiple pressure sensors, and the number is not limited herein. The pressure sensor 70 can be an IMS-C04A model sensor, which is a piezoelectric pressure sensor.

[0069] The pressure sensor 70 disposed on the inner side of the first electrode holder 1011 can measure the pressure between the first electrode 1012 and the experimental sample 110, and the pressure sensor 70 disposed on the inner side of the second electrode holder 1021 can measure the pressure between the second electrode 1022 and the experimental sample 110. After measuring the corresponding pressure data, the pressure sensor 70 can transmit it to the motion controller 402. When the electrode clamp device performs the action of clamping the experimental sample 110, the motion controller 402 can determine the progress of clamping the experimental sample 110 based on the received pressure value and control the rotation speed of the first guide rail module 20, which is equivalent to controlling the movement speed of the magnetic unit 401 to drive the electrode clamp 10 to move, so as to press the experimental sample 110 and protect the experimental sample 110 from being damaged.

[0070] For example, the motion controller 402 can regulate the rotation speed of the first guide rail module 20 according to the following rules: When the electrode fixture 10 has not yet contacted the experimental sample 110, that is, the pressure sensor 70 reading is zero and the motion controller 402 has not received any pressure value, the motion controller 402 drives the magnetic unit 401 on the first guide rail module 20 to move at a speed of 3-5 mm / s, and the electrode fixture 10 on the second guide rail module 30 also follows at a speed of 3-5 mm / s. When the motion controller 402 receives a reading from the pressure sensor 70 greater than 0.05 Newtons, indicating that the electrode fixture 10 has contacted the experimental sample 110, the motion controller 402 controls the rotation speed of the first guide rail module 20 to decrease to 1-2 mm / s. When the pressure sensor 70 reading is greater than 0.1 Newtons, indicating that the electrode fixture 10 has further clamped the experimental sample 110, the motion controller 402 continues to control the rotation speed of the first guide rail module 20 to decrease to 0.5-0.9 mm / s. When the reading of the pressure sensor 70 is greater than 0.2 Newtons, it indicates that the electrode clamp 10 has completely pressed the experimental sample 110. In order to protect the experimental sample 110 from damage, the motion controller 402 is immediately stopped and locked, so that the magnetic unit 401 drives the electrode clamp 10 to stop moving and the experiment begins. According to the pressure value between the electrode and the experimental sample 110, by repeatedly reducing the moving speed of the magnetic unit 401 and the electrode clamp 10, the inertial movement distance of the electrode clamp 10 when an emergency stop occurs can be greatly reduced, thereby further ensuring the integrity of the experimental sample 110, and the process of clamping the experimental sample 110 is more accurate than the manual clamping operation. After the experiment is completed, the motion controller 402 is started to control the magnetic unit 401 and the electrode clamp 10 to move away from the experimental sample 110 at a speed of 3mm / s. The motion controller 402 does not need to regulate the speed.

[0071] Optionally, based on the above embodiment, continue to refer to Figure 4The electrode fixture device further includes an impedance tester 80 . The two ends of the impedance tester 80 are electrically connected to the first electrode 1012 and the second electrode 1022 , respectively. The impedance tester 80 is used to measure the electrical impedance value between the first electrode 1012 and the second electrode 1022 .

[0072] Specifically, the impedance tester 80 is electrically connected to the first electrode 1012 and the second electrode 1022, and can measure the electrical impedance of the experimental sample 110 between the first electrode 1012 and the second electrode 1022. Based on the electrical impedance value, it can be determined whether the electrode fixture 10 is pressing the experimental sample 110. The impedance tester 80 can use a DT9505B model electrical impedance meter. By reading the impedance tester 80, the electrical impedance value of the experimental sample 110 between the first electrode 1012 and the second electrode 1022 is obtained. The impedance tester 80 can measure and display the electrical impedance value in real time.

[0073] For example, the specific process of determining whether the electrode fixture 10 is pressing the experimental sample 110 according to the electrical impedance value is as follows: during the process of the electrode fixture device performing the action of clamping the experimental sample 110, when the electrode fixture 10 moves to a point where it has not yet contacted the experimental sample 110, since there is air between the first electrode 1012 and the experimental sample 110 and between the second electrode 1022 and the experimental sample 110, the electrical impedance value of the experimental sample 110 between the first electrode 1012 and the second electrode 1022 tested by the impedance tester 80 is close to infinity; ... When the electrode holder 10 moves to contact the experimental sample 110, the impedance tester 80 will measure a certain impedance value. As the electrode holder 10 gradually presses the experimental sample 110, the impedance value should gradually decrease, but the impedance value is always greater than the impedance value of the experimental sample 110. When the impedance value measured by the impedance tester 80 is less than or equal to the impedance value of the experimental sample 110, for example, when the impedance tester 80 measures an impedance value of 1000 ohms, it indicates that the electrode holder 10 has pressed the experimental sample 110 and can provide the required impedance value data of the experimental sample 110 for subsequent experiments. Compared with the manual holding of the experimental sample in the prior art, the use of this electrode holder device can more accurately achieve automatic clamping of the experimental sample 110.

[0074] After the experimental sample 110 is properly clamped, the switches at both ends of the impedance tester 80 can be turned to the experimental signal providing unit 50 to turn on the experimental signal providing unit 50. The experimental signal providing unit 50 sends an experimental current signal to the experimental sample 110 to start the experiment.

[0075] Optionally, based on the above embodiment, continue to refer to Figure 4The electrode fixture device further includes: a first optical switch 901 and a second optical switch 902 . The first optical switches 901 include at least two and are disposed at the center of the first guide rail module 20 . The second optical switches 902 include at least two and are disposed at the center of the second guide rail module 30 .

[0076] The first optical switch 901 is used to measure the distance between the first optical switch 901 and the first electromagnet 4011, and the second optical switch 902 is used to measure the distance between the second optical switch 902 and the first electrode seat 1011; alternatively, the first optical switch 901 is used to measure the distance between the first optical switch 901 and the second electromagnet 4012, and the second optical switch 902 is used to measure the distance between the second optical switch 902 and the second electrode seat 1021.

[0077] Specifically, after the experiment is over, the electrode clamp 10 releases the experimental sample 110, and the motion controller 402 controls the magnetic unit 401 and the electrode clamp 10 to move in a direction away from the experimental sample 110, and after the magnetic unit 401 and the electrode clamp 10 leave the experimental sample 110 to the preset position, the motion controller 402 can control the first guide rail module 20 to stop rotating, so that the magnetic unit 401 and the electrode clamp 10 stop in time to prevent them from slipping off the guide rail. The preset position can be the farthest position on both sides of the center of the first guide rail module 20 and the second guide rail module 30, or it can be any position between the clamping position and the farthest position of the electrode clamp 10 during the experiment, which is not limited here. Selecting the preset position between the clamping position and the farthest end can save time in the clamping process before the next experiment and reduce the energy consumption of the motion controller 402.

[0078] As the magnetic unit 401 and the electrode fixture 10 move away from the experimental sample 110, whether they have reached the preset position can be determined by measuring with the first optical switch 901 and the second optical switch 902. The first and second optical switches 901, 902 can be SN04-N inductive proximity switches. The first optical switch 901 is positioned at the center of the first guide rail module 20, and the second optical switch 902 is positioned at the center of the second guide rail module 30. The first and second optical switches 901, 902 emit light from the center toward the farthest ends of their respective guide rail modules. Utilizing the principle that light travels in a straight line, the first optical switch 901 measures the distance between the first optical switch 901 and the magnetic unit 401, and the second optical switch 902 measures the distance between the second optical switch 902 and the electrode fixture 10. These measurements are compared with the preset distance to determine whether the magnetic unit 401 and the electrode fixture 10 have reached the preset position. The preset distance refers to the distance between the first and second optical switches 901, 902, and the preset position.

[0079] Each of the first optical switches 901 and the second optical switches 902 includes at least two. For example, one of the first optical switches 901 can measure the distance between the first optical switch 901 and the first electromagnet 4011, and the other first optical switch 901 can measure the distance between the first optical switch 901 and the second electromagnet 4012; one of the second optical switches 902 can measure the distance between the second optical switch 902 and the first electrode base 1011, and the other second optical switch 902 can measure the distance between the second optical switch 902 and the second electrode base 1021.

[0080] When the first optical switch 901 measures that the distance between it and the magnetic unit 401 has reached a preset distance, and / or the second optical switch 902 measures that the distance between it and the electrode fixture 10 has reached a preset distance, the first and second optical switches 901 and 902 send level signals to the motion controller 402, causing it to stop operating and control the first guide rail module 20 to stop rotating, which in turn also causes the second guide rail module 30 to stop rotating. Consequently, the magnetic unit 401 and the electrode fixture 10 also stop moving, effectively preventing the guide rail modules from slipping.

[0081] An embodiment of the present invention further provides a method for controlling the electrode clamp device described in the above embodiments. Figure 5 This is a flow chart of a control method for an electrode fixture device provided by an embodiment of the present invention. Figure 5 As shown, the method includes:

[0082] S110 , the clamp linkage structure drives the first guide rail module to rotate, the clamp linkage structure moves axially on the first guide rail module, and the clamp linkage structure drives the electrode clamp to move axially on the second guide rail module.

[0083] S120, the electrode fixture holds the experimental sample.

[0084] S130. The experimental signal providing unit provides an experimental current signal to the electrode fixture.

[0085] Specifically, the motion controller in the clamp linkage structure drives the first guide rail module to rotate, so that the magnetic unit in the clamp linkage structure installed on the first guide rail module moves along the axial direction of the first guide rail module, and the magnetic unit drives the electrode clamp to move along the axial direction of the second guide rail module. During the movement, the electrode clamp can automatically clamp the experimental sample. After the clamping action is completed, the experimental current signal can be output to the electrode clamp through the experimental signal providing unit and loaded onto the experimental sample. By using the electrode clamp device and applying the control method, it is possible to automatically clamp the experimental sample and provide the experimental current signal for conducting experiments.

[0086] Optionally, based on the above embodiment, the electrode fixture device further includes an impedance tester, and before the experimental signal providing unit provides the experimental current signal to the electrode fixture, further includes:

[0087] The impedance tester measures the electrical impedance value between the first electrode and the second electrode.

[0088] Specifically, the electrical impedance value obtained by the impedance tester can be used to determine whether the electrode is pressing the experimental sample tightly and ensure good contact between the electrode and the experimental sample.

[0089] In addition, the electrode fixture device further includes a pressure sensor, which can measure the pressure value between the first electrode and the experimental sample and the pressure value between the second electrode and the experimental sample.

[0090] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An electrode fixture device, characterized in that: The device is applied to experiments of injection current thermoacoustic imaging method, and comprises: an electrode fixture, a first guide rail module, a second guide rail module, a fixture linkage structure and an experimental signal providing unit; The electrode clamp is mounted on the second guide rail module and moves along the extension direction of the second guide rail module. The electrode clamp is used to clamp the experimental sample; The clamp linkage structure is installed on the first guide rail module and moves along the extension direction of the first guide rail module, and the clamp linkage structure is used to drive the electrode clamp to move; Wherein, the clamp linkage structure includes: a magnetic unit and a motion controller; The magnetic unit is arranged on the first guide rail module and moves along the extension direction of the first guide rail module; The motion controller is electrically connected to the first guide rail module and is used to drive the first guide rail module to rotate; The magnetic unit includes: a first electromagnet, a second electromagnet, and the electrode clamp device also includes a magnet power supply; The first electromagnet and the second electromagnet are arranged on the first guide rail module, and the magnet power supply is electrically connected to the first electromagnet and the second electromagnet, and is used to provide electrical energy to the first electromagnet and the second electromagnet, so that the first electromagnet and the second electromagnet generate magnetic force; The extension directions of the first guide rail module and the second guide rail module are not perpendicular to each other; The experimental signal providing unit is electrically connected to the electrode fixture, and is used to provide an experimental current signal to the electrode fixture; The electrode fixture includes a first electrode fixture and a second electrode fixture, the first electrode fixture includes a first electrode holder and a first electrode, and the second electrode fixture includes a second electrode holder and a second electrode; The device also includes: a pressure sensor; the pressure sensors include at least two, which are respectively arranged on the opposite inner sides of the first electrode seat and the second electrode seat, and the pressure sensors are used to measure the pressure between the first electrode and the experimental sample and the pressure between the second electrode and the experimental sample.

2. The electrode holder device according to claim 1, characterized in that The first electrode fixture and the second electrode fixture move in opposite directions.

3. The electrode holder device according to claim 2, characterized in that: The first electrode is fixed on the first electrode seat, the second electrode is fixed on the second electrode seat, and the first electrode seat and the second electrode seat are installed on the second guide rail module.

4. The electrode holder device according to claim 1, wherein: Also includes: Impedance tester; Two ends of the impedance tester are electrically connected to the first electrode and the second electrode respectively, and the impedance tester is used to measure the electrical impedance value between the first electrode and the second electrode.

5. The electrode holder device according to claim 1, characterized in that Also includes: a first optical switch and a second optical switch; The first optical switches include at least two and are disposed at the center of the first guide rail module; the second optical switches include at least two and are disposed at the center of the second guide rail module; The first optical switch is used to measure the distance between the first optical switch and the first electromagnet, and the second optical switch is used to measure the distance between the second optical switch and the first electrode base; or The first optical switch is used to measure the distance between the first optical switch and the second electromagnet, and the second optical switch is used to measure the distance between the second optical switch and the second electrode base.

6. A control method for an electrode fixture device according to any one of claims 1 to 5, characterized in that: include: The clamp linkage structure drives the first guide rail module to rotate, the clamp linkage structure moves axially on the first guide rail module, and the clamp linkage structure drives the electrode clamp to move axially on the second guide rail module; The electrode fixture clamps the experimental sample; The experimental signal providing unit provides an experimental current signal to the electrode fixture; The pressure sensor measures the pressure between the first electrode and the experimental sample and the pressure between the second electrode and the experimental sample.

7. The control method of the electrode fixture device according to claim 6, characterized in that: The electrode fixture device further includes an impedance tester, and before the experimental signal providing unit provides the experimental current signal to the electrode fixture, further includes: The impedance tester measures an electrical impedance value between the first electrode and the second electrode.

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