Micro-area testing device with movable probe

Abstract

The invention relates to the technical field of analysis and testing, in particular to a micro-area testing device with a movable probe, which comprises a detection table, a fixed frame, a fixed probe and a telescopic support, the fixed probe is used for stabilizing a test benchmark, and a four-direction moving mechanism is mounted on the telescopic support to drive the movable probe to move accurately. The four-direction moving mechanism is provided with a jumping mechanism which comprises a swing arm, an auxiliary arm and a laser instrument, the swing arm is controlled to swing through a driving assembly, transposition of a movable probe and the laser instrument is achieved, the probe jumps to a micro-area testing position, an optical microscope is arranged near the movable probe, a detection area is monitored in real time, and the detection accuracy is improved. The probe is integrated with a pH sensor and a potential sensor, and a pH sensitive film is arranged at a probe head. The device can flexibly detect micro-areas at different positions, the laser instrument firstly determines the position, the movable probe rapidly moves for detection, the optical microscope guarantees the detection accuracy, and the device is suitable for electrochemical detection of the micro-areas in multiple fields.

Description

Technical Field

[0001] The present invention relates to the technical field of analysis and testing, and in particular to a micro-area testing device with a movable probe. Background Art

[0002] In fields such as materials science, electrochemistry, and biomedicine, high-precision pH and potential measurements at tiny locations (microregions) are crucial for understanding the corrosion behavior of materials, the physiological activities of biological cells, and the local characteristics of chemical reactions. Traditional detection technologies typically rely on fixed-position probes. This design limits the ability to monitor parameter changes at different locations in real time, making it difficult to fully understand and precisely control material corrosion processes. Furthermore, traditional devices lack flexibility and cannot adapt to complex and diverse detection requirements, such as multi-point detection on samples of varying shapes and sizes. While existing technologies have achieved a certain degree of probe movement for detection, they still have significant shortcomings in precise positioning, efficient coverage of the detection area, and adaptability to diverse detection environments. For example, some devices are limited to linear or unidirectional movement, lacking the flexibility to perform comprehensive detection on complex surfaces. This results in incomplete test results that accurately reflect the actual sample conditions. Furthermore, the probe's movement accuracy is often insufficient, affecting the accuracy of the test data. Furthermore, existing technologies also lack sufficient protection for the probe, extending its service life, and enabling visualization of the detection process. The inability to provide intuitive visual feedback to operators hinders the timely identification of detection problems, increasing operational difficulty and the probability of error. In view of the above problems, developing a device that can flexibly and accurately test the pH value and potential of micro-areas is of great significance for promoting research and application in related fields. Summary of the Invention

[0003] In response to the above-mentioned problems of insufficient flexibility of micro-area detection technology, inaccurate detection position, low probe movement efficiency and inability to conduct real-time visual monitoring, the present invention provides a micro-area testing device with a movable probe. Through the coordinated work of the movable probe, laser positioning and optical microscope, high-precision and high-efficiency detection of micro-area pH value and potential is achieved, while the service life of the probe and the reliability of detection are improved, providing a more accurate and convenient solution for micro-area electrochemical detection.

[0004] The solution adopted by the present invention to solve its technical problems is: a micro-area testing device with a movable probe, including a detection table, a fixed frame is provided on the detection table, a fixed probe is fixedly installed in the detection area of ​​the detection table for providing a stable test benchmark, a retractable bracket is provided on the top of the fixed frame, a four-way moving mechanism is installed on the detection table through the retractable bracket, a movable probe is installed on the side of the four-way moving mechanism, the four-way moving mechanism drives the movable probe to move accurately on the detection table, so that the movable probe cooperates with the fixed probe to jointly detect the pH and potential of the object to be tested; a jumping mechanism is provided on the four-way moving mechanism, and the jumping mechanism includes a swing arm hinged on the hinged seat on the side of the four-way moving mechanism, a sub-arm is connected to one side of the swing arm at a specified angle, and a laser instrument is mounted on the sub-arm. The optical instrument is used to determine the micro-area test position of the object to be tested in advance. A telescopic tube is vertically arranged on the swing arm. The movable probe is installed in the telescopic tube and extends up and down following the movable sleeve in the telescopic tube. An arc-shaped guide platform is arranged on the left side of the four-way moving mechanism. The arc-shaped guide platform is provided with an inclined arc groove. A guide column extends outward from the movable sleeve of the telescopic tube, and the guide column extends into the inclined arc groove. A driving component for controlling the swing arm to rotate to a specified angle is also provided in the jumping mechanism. When the driving component controls the swing arm to swing, the guide column and the inclined arc groove provide a limiting guiding effect, so that the telescopic tube swings and extends and retracts at the same time, realizing the swing and telescopic jump of the movable probe, and the motion trajectory of the movable probe and the laser instrument is on the same arc line. When the movable probe swings and jumps, it realizes the exchange of position with the laser instrument, and controls the movable probe to jump directly to the micro-area test position.

[0005] Furthermore, the driving assembly includes an electromagnet fixed on the four-way moving mechanism, and an iron plate is embedded in the swing arm. When the electromagnet is energized, it attracts the iron plate and drives the swing arm to swing through the magnetic attraction between the two. The auxiliary arm is connected to the four-way moving mechanism through a tension spring. After the electromagnet is powered off, the tension of the tension spring pulls the swing arm and the auxiliary arm to reset.

[0006] Furthermore, the length of the inclined arc groove matches the swing angle and path of the swing arm and the auxiliary arm. When the guide column reaches the end of the inclined arc groove, the swing arm and the auxiliary arm swing into place.

[0007] Furthermore, the four-way moving mechanism is composed of a fixed component, an X-direction moving component and a Y-direction moving component. The fixed component is arranged at the lower end of the retractable bracket, and the X-direction moving component and the Y-direction moving component are arranged at the lower end of the fixed component and realize X-direction and Y-direction movement respectively. A universal wheel is installed at the bottom of the four-way moving mechanism, so that the four-way moving mechanism drives the movable probe to move precisely back and forth and left and right on the surface of the detection table.

[0008] Furthermore, the retractable bracket includes a rotating shaft that is longitudinally rotated on the top cross bar of the fixed frame through an axle seat, a turning handle is provided at the upper end of the rotating seat, a threaded column is vertically fixed to the lower end of the rotating shaft, and a threaded sleeve is threadedly installed at the lower end of the threaded column. The fixed component of the four-way moving mechanism is fixed to the lower end of the threaded sleeve by a bolt, and the rotating shaft is used to drive the four-way moving mechanism and the movable probe to turn, and the relative rotation of the threaded column and the threaded sleeve realizes the height adjustment of the four-way moving mechanism.

[0009] Furthermore, the telescopic tube includes a fixed sleeve and a movable sleeve, the fixed sleeve is fixedly sleeved on the swing arm, the movable sleeve is movably sleeved on the lower end of the fixed sleeve, and the movable sleeve and the fixed sleeve are connected by a compression spring, the movable probe is fixedly inserted into the movable sleeve, and the upper end of the movable probe is movably inserted into the movable sleeve to extend outward.

[0010] Furthermore, the movable probe and the fixed probe are integrated with a pH sensor and a potential sensor, which can detect and obtain the pH value and potential data of the corresponding position in real time during the movement process, and a pH sensitive membrane is provided at the needle tip of the probe.

[0011] Furthermore, an optical microscope is provided near the movable probe, which is fixed at the farthest end of the swing arm, and the lens is always facing the needle tip of the movable probe, for real-time monitoring of the situation in the detection area of ​​the movable probe.

[0012] The beneficial effects of the present invention are as follows: through the ingenious combination of the retractable bracket and the four-way movable mechanism, the probe can be flexibly moved in three-dimensional space, easily meeting the detection needs of samples of different shapes and sizes, and realizing all-round and multi-angle micro-area detection. The movable probe not only has a wide range of movement but can also be accurately positioned to the target micro-area with the assistance of a laser instrument, ensuring the accuracy of the detection position; The jumping mechanism design enables the movable probe to quickly jump to the preset detection position, significantly reducing the probe's movement time in non-detection areas and greatly improving detection efficiency. The mechanism also works in sync with the telescopic tube to effectively protect the movable probe. The telescopic tube retracts the probe as it moves to the new position, preventing damage from collisions with other objects. This significantly extends the probe's service life and reduces detection interruptions and costs caused by probe damage. The movable probe and the fixed probe work together, and the integrated pH sensor and potential sensor, together with the pH-sensitive membrane at the probe tip, can obtain the pH value and potential data of the detection position in real time and accurately, improving the detection accuracy and data reliability, and providing a more accurate experimental basis for research in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the structure of the detection platform and the retractable bracket of the present invention; Figure 4 This is one of the structural diagrams of the four-way moving mechanism of the present invention; Figure 5 This is the second structural diagram of the four-way moving mechanism of the present invention; Figure 6 This is a schematic diagram of the position structure of the optical microscope, movable probe and laser instrument of the present invention; Figure 7 Schematic diagram of the cross-sectional structure of the telescopic tube of the present invention; Figure 8 Schematic diagram of two states of the jumping mechanism of the present invention.

[0014] In the figure: 1. Testing table; 2. Fixed frame; 3. Fixed probe; 4. Retractable bracket; 401. Rotating axis; 402. Threaded column; 403. Threaded sleeve; 5. Four-way moving mechanism; 501. Fixed component; 502. Y-axis moving component; 503. X-axis moving component; 504. Universal wheel; 6. Swing arm; 7. Optical microscope; 8. Movable probe; 9. Auxiliary arm; 10. Laser instrument; 11. Telescopic tube; 111. Fixed sleeve; 112. Movable sleeve; 113. Compression spring; 114. Guide column; 12. Arc guide table; 13. Inclined arc groove; 14. Electromagnet; 15. Iron plate; 16. Tension spring. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] See also Figure 1-8 , the present invention provides a technical solution of a micro-area testing device with a movable probe: Example

[0017] As shown in Figures 1 to 8, it includes a testing platform 1, a fixed frame 2 is provided on the testing platform 1, a fixed probe 3 is fixedly installed in the testing area of ​​the testing platform 1, which is used to provide a stable test benchmark, and a retractable bracket 4 is provided on the top of the fixed frame 2. A four-way moving mechanism 5 is installed on the testing platform 1 through the retractable bracket 4, and a movable probe 8 is installed on the side of the four-way moving mechanism 5. The four-way moving mechanism 5 drives the movable probe 8 to move precisely on the testing platform 1, so that the movable probe 8 cooperates with the fixed probe 3 to jointly detect the pH and potential of the object to be tested. The design of the retractable bracket 4 enables the four-way moving mechanism 5 to drive the movable probe 8 to flexibly extend and retract within a certain range to adapt to the detection requirements of different heights; the four-way moving mechanism 5 can drive the movable probe 8 to move precisely back and forth, left and right on the testing platform 1, thereby realizing the detection of objects to be tested at different positions. An optical microscope 7 is installed on the side of the four-way moving mechanism 5. The optical microscope 7 is fixed at the farthest end of the swing arm 6, and the lens is always facing the needle tip of the movable probe 8. It is used to monitor the situation in the detection area of ​​the movable probe 8 in real time, including the contact point between the probe and the detection solution or sample. Its magnification is 100 times and the resolution is 0.1 μm, which can clearly observe the microstructure and the position of the probe in the detection area.

[0018] The specific structure of the four-way moving mechanism 5 is as follows Figure 4 and Figure 5 As shown, the four-way moving mechanism 5 is composed of a fixed component 501, an X-direction moving component 503 and a Y-direction moving component 502. The fixed component 501 is arranged at the lower end of the retractable bracket 4, and the X-direction moving component 503 and the Y-direction moving component 502 are respectively arranged at the lower end of the fixed component 501 and realize X-direction and Y-direction movement respectively. The specific moving structure of the X-direction moving component 503 and the Y-direction moving component 502 can adopt gear rack engagement to realize linear movement, or guide rail slider to realize linear movement. The mechanical structure that can realize linear transmission in the prior art can be applied here. In this embodiment, the specific structure of the moving mechanism is not further elaborated or limited. At the same time, a universal wheel 504 is installed at the bottom of the four-way moving mechanism 5. The universal wheel is made of wear-resistant, high-precision material and is finely ground to have a smooth surface to reduce friction during movement. In addition, the universal wheel 504 can change the moving direction according to actual conditions to facilitate changes in the detection area and ensure stability and accuracy during movement. The four-directional moving mechanism 5 can drive the movable probe 8 to move more smoothly on the surface of the detection platform 1, greatly improving the flexibility and convenience of detection.

[0019] like Figure 3As shown, the retractable bracket 4 includes a rotating shaft 401 which is longitudinally rotated on the top crossbar of the fixed frame 2 through an axle seat, a turning handle is provided at the upper end of the rotating shaft 401, a threaded column 402 is vertically fixed to the lower end of the rotating shaft 401, a threaded sleeve 403 is threadedly installed at the lower end of the threaded column 402, and the fixing component 501 of the four-way moving mechanism 5 is fixed to the lower end of the threaded sleeve 403 by a bolt; rotating the turning handle on the rotating shaft 401 can drive the four-way moving mechanism 5 and the movable probe 8 to turn on the detection table 1, so that the four-way moving mechanism The mechanism 5 can drive the movable probe 8 to move to different positions and angles on the detection platform 1. The relative rotation of the threaded column 402 and the threaded sleeve 403 can realize the height adjustment of the four-way movable mechanism 5 to meet the needs of detection at different heights. During specific use, the object to be tested is placed on the detection platform 1, and then the threaded column 402 is controlled to remain stationary, and the threaded sleeve 403 is rotated. With the cooperation of the threaded column 402 and the threaded sleeve 403, the four-way movable mechanism 5 and the movable probe 8 can be driven to move up and down, so that the movable probe 8 contacts the surface of the object to be tested.

[0020] In specific use, the present invention is a micro-area testing device with a movable probe. First, the object to be tested is placed on the test platform 1, and then the four-way moving mechanism 5 is controlled to move downward by the retractable bracket 4, so that the movable probe 8 contacts the object to be tested. At the same time, the universal wheel 504 at the bottom of the four-way moving mechanism 5 contacts the test platform 1. The operator can also adjust the position and angle of the four-way moving mechanism 5 by rotating the knob at the top of the retractable bracket 4 according to the size of the object to be tested and the detection requirements, thereby adjusting the movable probe 8 to the optimal detection posture and position. Then, by controlling the movement of the four-way moving mechanism 5 , so that the movable probe 8 moves and scans in an orderly manner within the selected micro-area, and cooperates with the fixed probe 3 to obtain the pH value and potential data of each detection point in real time, detect the pH and potential of the object to be tested, and transmit them to the corresponding data processing system for analysis and processing. At the same time, the optical microscope 7 will monitor the situation in the detection area of ​​the movable probe 8 in real time to ensure the accuracy and reliability of the detection. After the detection is completed, the acquired data can be analyzed and processed to draw a pH and potential distribution map of the surface of the object to be tested, providing rich data support for in-depth research on the electrochemical properties of the object. Example

[0021] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 5-Figure 8 As shown, the four-way moving mechanism 5 is provided with a jumping mechanism.

[0022] The jumping mechanism includes a swing arm 6 hinged on the hinged seat on the side of the four-way moving mechanism 5. A secondary arm 9 is connected to one side of the swing arm 6 at a specified angle. The angle between the swing arm 6 and the secondary arm 9 can be 45° or 60°. 45° is taken as an example here. A laser instrument 10 is mounted on the secondary arm 9. The laser instrument 10 can be a laser speckle meter, a laser profile meter or other equipment to roughly determine the position of the micro area to be detected and determine the micro area test position of the object to be tested in advance. A driving component is also provided in the jumping mechanism. The driving component is used to control the swing arm 6 and the secondary arm 9 to swing 45°. After the laser instrument 10 determines the micro-area position to be detected, the drive assembly starts to drive the swing arm 6 and the auxiliary arm 9 to rotate 45°, and moves the movable probe 8 to the original position of the laser instrument 10 for micro-area testing, while the laser instrument 10 moves to the next position to determine the detection position, and the motion trajectories of the movable probe 8 and the laser instrument 10 are located on the same arc. When the movable probe 8 swings and jumps, it can be exchanged with the laser instrument 10, and then the movable probe 8 is controlled to jump directly to the micro-area test position determined by the laser instrument 10, which greatly improves the efficiency and accuracy of detection.

[0023] The driving assembly is a key component for realizing the movement of the swinging and jumping mechanism. It includes an electromagnet 14 fixed on the four-way moving mechanism 5, and an iron plate 15 is embedded on the same side of the swing arm 6. When the electromagnet 14 is energized, the magnetic attraction it generates can attract the iron plate 15, thereby driving the swing arm 6 to swing; at the same time, the auxiliary arm 9 is connected to the four-way moving mechanism 5 through a tension spring 16. When the electromagnet 14 is powered off, the tension of the tension spring 16 will pull the swing arm 6 and the auxiliary arm 9 to reset, thereby realizing the transposition effect of the laser instrument 10 and the movable probe 8.

[0024] In order to further improve the protection effect of the movable probe 8 and prevent the needle of the movable probe 8 from being worn, in this embodiment, a telescopic tube 11 is vertically provided on the swing arm 6. The movable probe 8 is installed in the telescopic tube 11 and moves up and down following the movable sleeve 112 in the telescopic tube 11. The specific structure of the telescopic tube 11 is as follows: Figure 7As shown, it includes a fixed sleeve 111 fixedly mounted on the swing arm 6, and a movable sleeve 112 movably mounted on the lower end of the fixed sleeve 111. The movable sleeve 112 and the fixed sleeve 111 are connected by a compression spring 113. The movable probe 8 is fixedly inserted into the movable sleeve 112, and its upper end is movable through the movable sleeve 112 to extend outward. The movable probe 8 can follow the movable sleeve 112 to achieve upward and downward expansion in the fixed sleeve 111 to adapt to different detection surfaces and areas; an arc-shaped guide platform 12 is provided on the left side of the four-way moving mechanism 5, and an upward opening is provided on the arc-shaped guide platform 12. The inclined arc groove 13, a guide column 114 extends outward from the movable sleeve 112 of the telescopic tube 11, and the guide column 114 extends into the inclined arc groove 13. Through the cooperation of the guide column 114 and the inclined arc groove 13, during the swinging process of the swing arm 6, the guide column 114 and the inclined arc groove 13 play a role of limiting guide, so that the telescopic tube 11 can be extended and retracted while swinging, thereby enabling the movable probe 8 to be extended and retracted, and the length of the inclined arc groove 13 matches the swinging angle and path of the swing arm 6 and the auxiliary arm 9, that is, when the guide column 114 reaches the end of the inclined arc groove 13, the swing arm 6 and the auxiliary arm 9 are swung into place.

[0025] That is to say, when the laser instrument 10 moves to the front of the four-way moving mechanism 5 to determine the micro-area test position, the movable probe 8 is controlled by the driving assembly and the swing arm 6 to rotate 45° to the left. When the movable probe 8 swings, under the guidance of the guide column 114 and the inclined arc groove 13, the movable sleeve 112 can drive the movable probe 8 to move up and retract, and the needle tip of the movable probe 8 leaves the object to be tested, preventing the movable probe 8 from being seriously worn due to long-term contact with the object to be tested; when the laser instrument 10 determines the detection position, the electromagnet is powered off, and the tension spring pulls the swing arm 6 and the movable probe 8 to reset to the front of the four-way moving mechanism 5, that is, the detection position determined by the laser instrument 10. At the same time, the movable probe 8 is reset and, under the guidance of the guide column 114 and the inclined arc groove 13, is pushed downward again by the compression spring 113 to contact the object to be tested for micro-area testing.

[0026] During specific use, the present invention provides a micro-area testing device with a movable probe. First, the electromagnet is started to be energized and attract the iron plate, driving the swing arm 6 to swing to the left, and then the auxiliary arm 9 and the laser instrument 10 are moved to the appropriate position. At this time, the laser instrument 10 is located directly in front of the four-way moving mechanism 5. The micro-area testing position of the object to be tested is determined in advance by the laser instrument 10. At the same time, when the swing arm 6 drives the movable probe 8 to swing to the left, the telescopic tube 11 drives the movable probe 8 to retract upward away from the detection table 1 under the guidance of the guide column 114 and the inclined arc groove 13; when the micro-area testing position is determined, the electromagnet is powered off, and the tension spring pulls the swing arm 6 to reset, and the movable probe 8 swings and jumps to the micro-area testing position determined by the laser instrument 10. At the same time, the compression spring 113 in the telescopic tube 11 pushes the movable probe 8 to move down and contact the object to be tested, and the micro-area test is performed by the movable probe 8.

[0027] For example, when studying the corrosion behavior of a certain metal material, the metal material can be placed on the detection table 1 and detected using the micro-area testing device of the present invention. The laser instrument 10 is used to determine multiple micro-area test positions on the surface of the metal material, and then the movable probe 8 is controlled to jump to each test position in turn, and cooperates with the fixed probe 3 to detect the pH and potential values ​​of each position. Example

[0028] This embodiment further illustrates the structure of the probe. The movable probe 8 and the fixed probe 3 are integrated with a pH sensor and a potential sensor, which can detect and obtain the pH value and potential data of the corresponding position in real time during movement. A pH-sensitive membrane is provided at the needle tip of the probe to improve the sensitivity and accuracy of pH detection. In practical applications, a suitable pH-sensitive material, such as a glass membrane or a polymer membrane, can be selected. After fully dissolving it to form a uniform solution, the solution can be evenly applied to the tips of the movable probe 8 and the fixed probe 3 by immersion or dripping, and then dried or cured to form a pH-sensitive membrane.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A micro-area testing device with a movable probe, comprising a testing platform, a fixing frame provided on the testing platform, a fixed probe fixedly installed in the testing area of ​​the testing platform, for providing a stable testing benchmark, characterized in that: A retractable bracket is provided on the top of the fixed frame, and a four-way moving mechanism is installed on the detection table through the retractable bracket. A movable probe is installed on the side of the four-way moving mechanism. The four-way moving mechanism drives the movable probe to move accurately on the detection table, so that the movable probe cooperates with the fixed probe to jointly detect the pH and potential of the object to be tested; a jumping mechanism is provided on the four-way moving mechanism, and the jumping mechanism includes a swing arm hinged on the hinged seat on the side of the four-way moving mechanism, and a sub-arm is connected to a specified angle on one side of the swing arm, and a laser instrument is installed on the sub-arm. The laser instrument is used to determine the micro-area test position of the object to be tested in advance, and a telescopic tube is vertically provided on the swing arm. The movable probe is installed on the telescopic tube. The movable sleeve in the tube and following the telescopic tube extends and retracts up and down, an arc-shaped guide platform is provided on the left side of the four-way moving mechanism, and an inclined arc groove is provided on the arc-shaped guide platform. A guide column extends outward from the movable sleeve of the telescopic tube, and the guide column extends into the inclined arc groove. A driving component for controlling the swing arm to rotate to a specified angle is also provided in the jumping mechanism. When the driving component controls the swing arm to swing, the guide column and the inclined arc groove provide a limiting guiding effect, so that the telescopic tube swings and retracts at the same time, realizing the swing and telescopic jump of the movable probe, and the motion trajectory of the movable probe and the laser instrument is on the same arc line. When the movable probe swings and jumps, it realizes the exchange of position with the laser instrument, and controls the movable probe to directly jump to the micro-area test position.

2. The micro-area testing device with a movable probe according to claim 1, characterized in that: The driving assembly includes an electromagnet fixed on the four-way moving mechanism, and an iron plate is embedded in the swing arm. When the electromagnet is energized, it attracts the iron plate and drives the swing arm to swing through the magnetic attraction between the two. The auxiliary arm is connected to the four-way moving mechanism through a tension spring. When the electromagnet is powered off, the tension of the tension spring pulls the swing arm and the auxiliary arm to reset.

3. The micro-area testing device with a movable probe according to claim 2, characterized in that: The length of the inclined arc groove matches the swing angle and path of the swing arm and the auxiliary arm. When the guide column reaches the end of the inclined arc groove, the swing arm and the auxiliary arm swing into place.

4. The micro-area testing device with a movable probe according to claim 1, characterized in that: The four-way moving mechanism consists of a fixed component, an X-direction moving component and a Y-direction moving component. The fixed component is arranged at the lower end of the retractable bracket, and the X-direction moving component and the Y-direction moving component are arranged at the lower end of the fixed component and realize X-direction and Y-direction movement respectively. A universal wheel is installed at the bottom of the four-way moving mechanism, so that the four-way moving mechanism drives the movable probe to move precisely back and forth and left and right on the surface of the detection table.

5. A micro-area testing device with a movable probe according to claim 1 or 4, characterized in that: The retractable bracket includes a rotating shaft that is longitudinally rotated on the top cross bar of the fixed frame through an axle seat, a turning handle is provided at the upper end of the rotating seat, a threaded column is vertically fixed to the lower end of the rotating shaft, and a threaded sleeve is threadedly installed at the lower end of the threaded column. The fixed component of the four-way moving mechanism is fixed to the lower end of the threaded sleeve by a bolt, and the rotating shaft is used to drive the four-way moving mechanism and the movable probe to turn, and the relative rotation of the threaded column and the threaded sleeve realizes the height adjustment of the four-way moving mechanism.

6. The micro-area testing device with a movable probe according to claim 1, characterized in that: The telescopic tube includes a fixed sleeve and a movable sleeve. The fixed sleeve is fixedly sleeved on the swing arm, and the movable sleeve is movably sleeved on the lower end of the fixed sleeve. The movable sleeve and the fixed sleeve are connected by a compression spring. The movable probe is fixedly inserted into the movable sleeve, and the upper end of the movable probe movably inserts into the movable sleeve and extends outward.

7. The micro-area testing device with a movable probe according to claim 1, characterized in that: The movable probe and the fixed probe are integrated with a pH sensor and a potential sensor, which can detect and obtain the pH value and potential data of the corresponding position in real time during the movement. A pH sensitive membrane is provided at the needle tip of the probe.

8. The micro-area testing device with a movable probe according to claim 1, characterized in that: An optical microscope is provided near the movable probe and fixed at the farthest end of the swing arm, with its lens always facing the needle tip of the movable probe, for real-time monitoring of the situation in the detection area of ​​the movable probe.

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