An experimental system for intrinsic flexible thickness sensor sensitivity characteristic research

Abstract

The application discloses an experimental system for intrinsic flexible thickness sensor sensitive characteristic research, and belongs to the technical field of sensor performance test; the experimental system comprises a platform base, a platform displacement slider, a displacement slider supporting rod, a clamping plate connecting supporting rod, a coil fixing clamping plate and a metal sample fixing clamping plate; the system can be used to realize the thickness nondestructive detection sensitive characteristic research of the intrinsic flexible thickness sensor under the conditions of a plane and different bending states; the system can be used to conduct low-frequency transmission type nondestructive measurement experiments on metal samples with different thicknesses after the sensor is fixed on different coil fixing clamping plates, so that the intrinsic flexible sensor sensitive characteristics are obtained; the application can realize the characteristic research of the intrinsic flexible thickness sensor nondestructive detection experiment under multiple conditions, the system has simple structure and is convenient to operate, the setting of each component in the system can be flexibly adjusted according to the experimental requirements, the experimental analysis cost is low, and the system is suitable for the sensitive characteristic experiment and research analysis of the intrinsic flexible sensor.

Description

Technical Field

[0001] This invention relates to the field of sensor performance testing technology, and specifically to an experimental system for studying the sensitive characteristics of intrinsic flexible thickness sensors. Background Technology

[0002] Flexible sensing technology, as an emerging detection technology, is widely used in complex environment detection, wearable devices, and medical fields. Due to the inherent softness and high ductility of intrinsically flexible materials, flexible sensors can be effectively applied to environments where traditional rigid sensors cannot operate, such as the interlayer of some wearable devices or the narrow gaps in certain industrial equipment. Conductive polymer composites, as a novel functional material, are widely used in flexible sensors. Carbon nanotubes, as the conductive phase of conductive polymer composites, and silicone rubber, as the matrix phase, are used to prepare composite materials through solution blending. These composites possess both good conductivity and the excellent ductility of silicone rubber. Intrinsically flexible planar spiral coils, combined with planar coil structures, serve as sensitive components in flexible sensors, enabling effective non-destructive thickness detection. During the development of intrinsically flexible sensors and the research and performance calibration of their sensitive components, the inherent bending deformation of flexible sensor components necessitates effective overall or bending condition fixation of the sensitive components. Without this effective fixation, it is impossible to analyze the overall and special-condition performance of the flexible sensor. Therefore, effectively placing the flexible sensor is a crucial aspect of the research and analysis process. To obtain and analyze the performance indicators of intrinsically flexible sensitive components in non-destructive thickness measurement experiments under flat surface conditions or fixed curved surface conditions, an experimental system is needed for studying the sensitive characteristics of intrinsically flexible thickness sensors. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing non-destructive testing experiments and characteristic studies of sensitive components in intrinsic flexible thickness sensors by providing an experimental system that can be used for studying the sensitive characteristics of intrinsic flexible thickness sensors in a planar or constant curvature bending state.

[0004] The technical solution adopted in this invention is as follows: an experimental system for studying the sensitive characteristics of an intrinsically flexible thickness sensor, comprising an experimental platform, a platform base, a platform displacement slider, a displacement slider support rod, a clamping plate connecting support rod, a coil fixing clamp, and a metal sample fixing clamp; the platform base of the test platform is made of metal, and grooves are designed at both ends of the base for fixing the platform displacement slider; the platform displacement slider is fixed by a knob design, and the horizontal distance between each coil fixing clamp and the metal sample fixing clamp is controlled by moving it horizontally on the platform base; the displacement slider support rod is rotatably installed on the displacement slider by a bottom thread, and the clamping plate connecting support rod is fixed by a screw hole knob on the side of the support rod; the coil fixing clamp can be divided into two parts: a clamping plate base and a movable plate. The clamping plate base is connected to the clamping plate connecting rod, and the movable plate is fixed to the coil position and connected to the clamping plate base by screw holes located at the four corners; the metal sample fixing clamp adopts a six-screw hole cross-connection mode to fix metal samples of different thicknesses.

[0005] According to the above scheme, the platform base has a lateral length of 400mm to provide displacement distance, a width of 40mm, a height of 20mm, and a trapezoidal groove structure on the side that is 15mm wide, 10mm deep, and 10mm wide. The displacement slider has a lateral width of 25mm and an axial width of 90mm. The lower half of the displacement slider fits into the groove of the platform base and is fixed by an M6 screw on the side of the slider, thereby achieving its fixation on the platform base and distance control.

[0006] According to the above scheme, the experimental system for studying the sensitive characteristics of an intrinsic flexible thickness sensor is characterized in that the coil fixing clamp is divided into two parts: a clamp base and a movable clamp. Both parts are rectangular in structure. The bottom of the clamp base is connected to the clamp connecting rod and fixed to the displacement slider support rod via a side hole M6 stud knob. The displacement slider support rod is 50mm long and 20mm in diameter. The clamp height is adjusted by adjusting the clamp connecting rod to maintain coaxial adaptation of each clamp. The movable clamp of the coil fixing clamp is 90mm long and 90mm wide. The movable clamp matching the planar clamp base is 5mm thick and made of PMMA non-metallic material. The movable clamp matching the curved clamp base is 0.5mm thick and made of PET non-metallic material. The movable clamp is connected to the clamp base via four non-metallic M4 stud-screw hole connections. The center of the movable clamp has a 70mm diameter cylindrical hollow structure, exposing the sensitive components of the intrinsic flexible thickness sensor and the planar coil used in the experiment. The clamp bases are available in planar and constant curvature types, with constant curvature radii of 5.3 cm, 6.0625 cm, 7.5 cm, 10.625 cm, and 20.5 cm, respectively. Fixing the sensitive element of the intrinsic flexible thickness sensor to the clamp base results in a bending state similar to that of the clamp base. In a cyclic experiment studying the characteristics of the intrinsic flexible thickness sensor's sensitive element, by fixing the sensitive element to the clamp base of the coil fixing clamp with a constant curvature radius and tightening it with a movable clamp, the intrinsic flexible sensitive element can exhibit the bending state of the clamp base. In this bending state, the excitation source coil, connected to an excitation source, provides the experimental magnetic field environment required for the experiment. The connected signal acquisition system acquires the response characteristics of the intrinsic flexible thickness sensor's sensitive element to the thickness of the metal sample. After recording the dynamic data, the response characteristics of the flexible sensitive element to metal samples of different thicknesses are obtained by replacing the metal sample on the clamp base. After completing one experimental cycle, the sensitive components of the intrinsic flexible thickness sensor are removed from the coil fixing clamp and installed on another clamp base with a fixed radius of curvature. The clamp is then secured with a movable clamp, and the next experimental cycle is performed. According to the above scheme, the experimental system for studying the sensitive characteristics of the intrinsic flexible thickness sensor has a metal sample fixing clamp divided into two parts. The two parts of the metal sample fixing clamp have identical structures and are fixed together using six non-metallic M4 screws. After the two parts are joined, the gap between them is a 100mm × 100mm hollow structure to expose and fix the metal sample to be tested. Depending on the needs of the non-destructive thickness test, the metal sample can be replaced to change the thickness.

[0007] According to the above scheme, the experimental system for studying the sensitive characteristics of the intrinsic flexible thickness sensor, the platform base, platform displacement slider, and displacement slider support rod are made of electroplated anodized aluminum. The screws used for tightening the clamping plate connecting support rod, the clamping plate base of the coil fixing clamping plate, and the metal sample fixing clamping plate are all made of non-metallic PMMA material. The movable clamping plate of the coil fixing clamping plate is made of PMMA material with a thickness of 5mm or PET material with a thickness of 0.5mm, depending on whether the clamping plate base is flat or curved.

[0008] The beneficial effects of this invention are:

[0009] 1. This invention can obtain dynamic data of the relevant characteristics of the sensitive components of the intrinsic flexible thickness sensor under planar or constant curvature bending conditions during non-destructive thickness testing, and use this dynamic data to study and analyze the thickness measurement characteristics of the sensitive components of the intrinsic flexible thickness sensor.

[0010] 2. The experimental system of this invention has a simple overall structure, is easy to control, and is easy to connect with other detection equipment and integrate. It can effectively reduce the research cost of the characteristics of the sensitive components of the intrinsic flexible thickness sensor during the experiment. Attached Figure Description

[0011] Figure 1 This is a top view of the experimental system for studying the sensing characteristics of an intrinsic flexible thickness sensor.

[0012] Figure 2 This is a side view of the experimental system for studying the sensing characteristics of an intrinsic flexible thickness sensor.

[0013] Figure 3 This is the front view of the experimental system for studying the sensing characteristics of the intrinsic flexible thickness sensor.

[0014] Figure 4 This is a schematic diagram illustrating one embodiment of the present application.

[0015] Figure 5 Three views of a coil fixing clamp in a planar state.

[0016] Figure 6 Three-view diagram of the clamp base for fixing a curved coil with a radius of curvature of 20.5 cm.

[0017] Figure 7 Three-view diagram of the clamp base for fixing a curved coil with a radius of curvature of 10.625 cm.

[0018] Figure 8 Three views of the clamp base for fixing a curved coil with a radius of curvature of 7.5 cm.

[0019] Figure 9 Three-view drawing of the base of the clamping plate for fixing the curved coil with a radius of curvature of 6.0625cm.

[0020] Figure 10 Three views of the clamp base for fixing a curved coil with a radius of curvature of 5.3 cm.

[0021] Figure 11 This is a flowchart illustrating the experimental characteristic analysis of metal sample thickness measurement using an experimental system employed in the study of the sensitivity characteristics of an intrinsically flexible thickness sensor, as described in this embodiment.

[0022] Figures 1-3 In the diagram, 'a' represents the platform base of the experimental platform; 'b' represents the platform displacement slider; 'c' represents the displacement slider support rod; 'd' represents the clamping plate connecting support rod; 'e' represents the clamping plate base of the coil fixing clamping plate; 'f' represents the metal sample fixing clamping plate; 'g' represents the set screw of the platform displacement slider; 'h' represents the set screw of the displacement slider support rod; 'i' represents the set screw of the coil fixing clamping plate; 'j' represents the set screw of the metal sample fixing clamping plate; 'k' represents the movable clamping plate of the coil fixing clamping plate; and 'l' represents the movable clamping plate of the metal sample fixing clamping plate. During the measurement process, the platform displacement slider is fixed to the platform base by its set screws. The coil fixing clamping plate is nested with the displacement slider support rod via the clamping plate connecting support rod and fixed by its set screws. The movable clamping plate of the coil fixing clamping plate and the movable clamping plate of the metal sample fixing clamping plate are both mounted on the clamping plate by set screws.

[0023] Figure 4 This diagram illustrates an experimental system used in the embodiment for studying the sensitivity characteristics of an intrinsically flexible thickness sensor.

[0024] Figures 5-10 The diagram shows the base modules for the various coil fixing clamps used in the experimental system. These include planar clamp bases and clamp bases in a curved state with a fixed radius of curvature. The radius of curvature of the curved surface is calculated based on the arc height and chord length. The designed radii of curvature for the curved coil fixing clamps in the experimental system are 5.3cm, 6.0625cm, 7.5cm, 10.625cm, and 20.5cm. During the experiment, depending on different experimental requirements, the coil fixing clamps are connected to the displacement slider support rod via clamp connecting rods and fixed to the platform displacement slider.

[0025] Figure 11This flowchart illustrates the experimental system used in the study of the sensitivity characteristics of an intrinsic flexible thickness sensor in a metal sample thickness measurement experiment. At the start of the experiment, the displacement slider b is connected to the displacement slider support c, and the clamping support d is connected to the clamping base e of the coil fixing clamp. During the experiment studying the characteristics of the intrinsic flexible thickness sensor's sensitive components, the sensor is fixed to the clamping base of the coil fixing clamp with a fixed radius of curvature. After being tightened with a movable clamp, the intrinsic flexible sensitive component is made to bend in the clamping base. In this bent state, the excitation source coil, connected to an excitation source, provides the necessary experimental magnetic field environment. The signal acquisition system is used to acquire the response characteristics of the intrinsic flexible thickness sensor's sensitive component to the thickness of the metal sample. After recording the dynamic data, the response characteristics of the flexible sensitive component to metal samples of different thicknesses are obtained by changing the metal sample on the metal sample fixing clamp. After completing one experimental cycle, the sensitive components of the intrinsic flexible thickness sensor are removed from the coil fixing clamp and installed on another clamp base with a fixed radius of curvature. The movable clamp is then used to secure the sensor for the next experimental cycle. Detailed Implementation

[0026] The following describes the use of an experimental system for studying the sensitivity characteristics of an intrinsically flexible thickness sensor, as proposed in this invention, with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] (1) As Figures 1-3 As shown, an embodiment of the present invention provides an experimental system for studying the sensitive characteristics of an intrinsic flexible thickness sensor. The platform base is an I-shaped anodized aluminum platform a, and a platform displacement slider b can be embedded in the platform base a and fixed by a set screw g on the side of the platform displacement slider. One end of the clamping plate connecting rod d is connected to the clamping plate base e of the coil fixing clamping plate or the metal sample fixing clamping plate f by a stud, and the other end is inserted into the displacement slider support rod c and fixed by a set screw h of the displacement slider support rod. The clamping plate base e of the coil fixing clamping plate is used to install the flexible sensitive component used in the experiment of studying the sensitive characteristics of the intrinsic flexible thickness sensor. The fixing method is to use the set screw i of the coil fixing clamping plate to bolt the movable clamping plate k of the coil fixing clamping plate to the clamping plate base e of the coil fixing clamping plate. The metal fixing clamping plate f is used to fix the metal sample used in the experiment of studying the sensitive characteristics of the intrinsic flexible thickness sensor. The fixing method is to use the set screw j of the metal sample fixing clamping plate to bolt the movable clamping plate l of the metal sample fixing clamping plate to the metal sample fixing clamping plate f.

[0028] (2) Figure 4 As shown, the experimental system for studying the sensing characteristics of an intrinsic flexible thickness sensor is used in the following steps:

[0029] S1. Place the sensitive component of the intrinsic flexible thickness sensor (taking an intrinsic flexible planar helical coil as an example) between the movable clamp k and the clamp base e of the coil fixing clamp, and tighten it using the set screw i of the coil fixing clamp. Place the planar coil, which serves as the excitation source, between the movable clamp k and the clamp base e of the coil fixing clamp on the other side of the platform, and tighten it using the set screw i of the coil fixing clamp. Similarly, fix the metal sample used for studying the sensitive characteristics of the intrinsic flexible thickness sensor between the movable clamp l and the metal sample fixing clamp f of the metal sample fixing clamp, and tighten it using the set screw j of the metal sample fixing clamp.

[0030] S2. Connect the clamp base e (with the intrinsically flexible sensitive component and excitation source coil installed) and the metal sample fixing clamp f (with the metal sample installed) to the stud at one end of the clamp connecting rod d. Embed the clamp connecting rod d into the displacement slider rod c. Connect the displacement slider rod c to the displacement slider b via a stud at one end. Finally, place the displacement slider on the platform base a. During this process, adjust the clamp base e (representing the coil fixing clamp) and the metal sample fixing clamp f to be parallel according to specific experimental requirements. Adjust the three clamp connecting rods within the platform to ensure that the bottom of the clamp base e (representing the coil fixing clamp) and the metal sample fixing clamp f are level.

[0031] S3. After completing the parallel and horizontal alignment of the clamp base e of the coil fixing clamp and the metal sample fixing clamp f, the excitation source coil of the experimental system used for the study of the sensitive characteristics of the intrinsic flexible thickness sensor is connected to the excitation source system. The sensitive component of the intrinsic flexible thickness sensor used for the study of the sensitive characteristics of the intrinsic flexible thickness sensor is connected to the signal acquisition system. A non-destructive thickness measurement characteristic experiment is then performed on the sensitive component of the intrinsic flexible thickness sensor installed in the experimental system. During the experiment, the distance between the excitation source and the metal sample is maintained at 10 mm by adjusting the platform displacement slider b, and the distance between the sensitive component of the intrinsic flexible thickness sensor and the metal sample is maintained at 15 mm by adjusting the platform displacement slider b. The excitation source system provides an alternating signal with a peak-to-peak value of 20 V and a frequency of 1 kHz. The alternating signal acts on the excitation source planar coil, generating an alternating magnetic field. The intrinsically flexible sensitive component generates an induced signal after being subjected to the external alternating magnetic field. The induced signal is acquired and displayed by the signal acquisition system.

[0032] S4. Based on steps S1-S3, conduct research on the sensing characteristics of the intrinsically flexible thickness sensor. The intrinsically flexible sensing element's states include planar state and curved surface states with radii of curvature of 20.5cm, 10.625cm, 7.5cm, 6.0625cm, and 5.3cm. For example... Figures 5-10 As shown, during the measurement process, the intrinsically flexible sensitive element is placed sequentially between the movable clamp k of the coil fixing clamp and the clamp base e of the coil fixing clamp, and tightened using the set screw i of the coil fixing clamp. The clamp base e of the fixing clamp with the sensitive element of the intrinsically flexible thickness sensor installed is connected to the stud at one end of the clamp connecting rod d. The clamp connecting rod d is embedded into the displacement slider rod c, and the displacement slider rod c is connected to the displacement slider b through the stud at one end. Finally, the displacement slider is placed on the platform base a. Step S3 is repeated to conduct a non-destructive thickness measurement sensitivity characteristic experiment on the sensitive element of the intrinsically flexible thickness sensor in planar state and with curvature radii of 20.5cm, 10.625cm, 7.5cm, 6.0625cm, and 5.3cm, respectively, measuring the thickness of the metal sample on the metal sample fixing clamp f.

[0033] This embodiment is an operational method for studying the experimental characteristics of non-destructive thickness measurement using the sensitive components of an intrinsic flexible thickness sensor. In this field, relevant researchers or operators can modify or replace the embodiment to meet different operational scenarios, provided they understand the principles of this invention.

Claims

1. An experimental system for studying the sensing characteristics of an intrinsically flexible thickness sensor, characterized in that, It includes an experimental platform, as well as a platform base, a platform displacement slider, a displacement slider support rod, a clamping plate connecting support rod, a coil fixing clamping plate, and a metal sample fixing clamping plate; The platform base has grooves at both ends for fixing and adjusting the platform displacement slider. The platform displacement slider is fixed and adjusted by side screws and knobs, and the horizontal distance between each coil fixing clamp and the metal sample fixing clamp is controlled by moving it horizontally on the platform base. The displacement slider support rod is installed on the platform displacement slider by rotating it through the thread at one end of the support rod. The displacement slider support rod has a hollow structure inside for nested installation of the clamp connecting support rod, and the clamp connecting support rod is fixed by the side screw holes. The clamp connecting support rod is nested inside the displacement slider support rod and is used to connect the coil fixing clamp and the metal sample fixing clamp. After being embedded in the displacement slider support rod, it is fixed by the side screws and the relative height between the coil fixing clamp and the metal sample fixing clamp is adjusted. The coil fixing clamp consists of two parts: a clamp base and a movable clamp. The clamp base is connected to the clamp connecting rod and is used to place the sensitive component of the intrinsic flexible thickness sensor. The movable clamp uses M4 screw holes at its four ends to fix the sensitive component of the intrinsic flexible thickness sensor or the planar coil used in the experiment, and is connected to the clamp base via M4 studs. The clamp base is designed to be planar and curved with different radii of curvature, including radii of curvature of 5.3cm, 6.0625cm, 7.5cm, 10.625cm, and 20.5cm. The movable clamp is made of either 5mm thick PMMA non-metallic material or 0.5mm thick PET non-metallic material, depending on whether the clamp base is planar or curved. The platform base, platform displacement slider, and displacement slider support rod are made of electroplated anodized aluminum; the screws used for tightening the clamping plate connecting support rod and the metal sample fixing clamping plate are made of non-metallic PMMA material; the studs of the clamping plate base of the coil fixing clamping plate are made of non-metallic PMMA material; the metal sample fixing clamping plate uses a six-M4 screw hole cross-connection mode to fix metal samples of different thicknesses and corresponding sizes. The sensitive component of the intrinsically flexible thickness sensor is a flexible planar helical coil.

2. The experimental system for studying the sensing characteristics of intrinsic flexible thickness sensors as described in claim 1, characterized in that, The platform base is 400mm long, providing a displacement distance, 40mm wide, and 20mm high. The side has a trapezoidal groove structure that is 15mm wide, 10mm deep, and 10mm wide. The platform displacement slider is 25mm long and 90mm wide. The lower half of the platform displacement slider fits into the groove of the platform base and is fixed by an M6 screw on the side of the slider, thereby achieving its fixation on the platform base and distance control.

3. The experimental system for studying the sensing characteristics of intrinsic flexible thickness sensors as described in claim 1, characterized in that, The coil fixing clamp is divided into two parts: the clamp base and the movable clamp, and the two parts are a rectangular structure as a whole.

4. The experimental system for studying the sensing characteristics of intrinsic flexible thickness sensors as described in claim 3, characterized in that, The clamp base is connected to the clamp connecting rod and fixed to the displacement slider support rod through the side hole M6 stud knob. The displacement slider support rod is 50mm long and 20mm in diameter. The clamp height is adjusted by adjusting the clamp connecting rod to keep the clamps coaxial and adapted.

5. The experimental system for studying the sensing characteristics of intrinsic flexible thickness sensors as described in claim 1, characterized in that, The metal sample fixing clamp is divided into two parts. The two parts of the metal sample fixing clamp have the same structure and are fixed together by six non-metallic M4 screws. After the two parts are connected, the gap between them is a hollow structure with a size of 100mm×100mm to expose and fix the metal sample to be tested. The metal sample can be replaced to change the thickness according to the needs of the thickness non-destructive test.

6. The experimental system for studying the sensing characteristics of an intrinsic flexible thickness sensor as described in claim 1, characterized in that, The center of the movable clamp has a 70mm diameter cylindrical hollow structure, exposing the sensitive components of the intrinsic flexible thickness sensor.

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