A device for detecting the light transmittance of a durability plate

Abstract

The application relates to the technical field of endurance plate detection, in particular to a light transmittance detection device for endurance plate, which comprises a rack, a mounting seat for loading samples is arranged on the rack, a clamping mechanism for fixing the samples is arranged on the mounting seat; a supporting plate for supporting the samples is arranged on the mounting seat, and the supporting plate can be synchronously extended and retracted along the length direction of the clamping mechanism with the clamping action of the clamping mechanism; a detection module for detecting the samples is arranged on the rack. The clamping mechanism comprises a linear driver and a clamping block; the linear driver is arranged on the mounting seat, and the driving end of the linear driver is connected with the clamping block; a first guide rail extending in the horizontal direction is arranged on the clamping block, and the supporting plate is in sliding fit with the first guide rail. The application can stably support the samples when detecting samples of different sizes, the samples can be kept in a flat state through the support of the supporting plate, and the problem that the middle part of the samples is deflected under the action of gravity and the detection precision is affected is solved.

Description

Technical Field

[0001] This invention application relates to the field of polycarbonate sheet testing technology, specifically to a polycarbonate sheet transmittance testing device. Background Technology

[0002] Polycarbonate sheet, also known as PC sheet or solid polycarbonate sheet, is a transparent or semi-transparent sheet made from high-performance engineering plastic polycarbonate. When transparency of the polycarbonate sheet is required, samples need to be cut and their light transmittance tested. Currently, the light transmittance testing of polycarbonate sheets is usually done manually. However, manual operation is not only inefficient, but the accuracy of the test is also affected by the operator's experience and is not stable.

[0003] To address this, Chinese Patent Application Publication No. CN115046965A discloses a polycarbonate sheet transmittance testing device. A first adjusting seat can move a side plate, allowing a transmittance meter mounted on the side plate to perform the testing. A second adjusting seat on the worktable can move a moving seat, thereby adjusting the overall position of the placement plate and enabling omnidirectional testing of the polycarbonate sheet. Multiple placement plates can be used to simultaneously test multiple polycarbonate sheets, improving testing efficiency and speed. A push rod within the positioning block can push a clamping block to fix the polycarbonate sheet. The testing cover allows the light source to perform transmittance testing in a sealed environment. The light source passes through the testing port through the polycarbonate sheet to the transmittance meter, displaying a precise value on the meter's screen. After testing, unqualified polycarbonate sheets are collected and processed, while qualified sheets are conveyed to a receiving bin via a conveyor.

[0004] Transmittance testing essentially measures the luminous flux loss of perpendicularly incident light rays after passing through a material. When a sample is bent, the incident angle of the light rays shifts, increasing the transmittance error. For thinner or larger samples, under the influence of gravity, sagging is less likely to occur, causing the light path to shift and directly affecting the accuracy of transmittance testing. Summary of the Invention

[0005] To address the aforementioned issues, a polycarbonate sheet transmittance testing device is provided. This device, through a frame, mounting base, clamping mechanism, and testing module, solves the problem of sample sagging in the middle under gravity, which affects testing accuracy.

[0006] To address the problems of the prior art, this invention provides a polycarbonate sheet transmittance testing device, including a frame, a mounting base for carrying a sample on the frame, a clamping mechanism for fixing the sample on the mounting base, a support plate for supporting the sample on the mounting base, and the support plate can synchronously extend and retract along its length direction as the clamping mechanism clamps; and a testing module for testing the sample on the frame.

[0007] Preferably, the clamping mechanism includes a linear driver and a clamping block; the linear driver is mounted on the mounting base, and the driving end of the linear driver is connected to the clamping block; the clamping block is provided with a first guide rail extending in the horizontal direction, and the support plate slides in cooperation with the first guide rail.

[0008] Preferably, the support plate includes a first substrate and a second substrate; the first substrate is provided with guide strips that slide in cooperation with the second substrate.

[0009] Preferably, the top ends of both the first substrate and the second substrate are provided with cleaning strips for cleaning the sample; the clamping block is provided with a first linear drive assembly for controlling the movement of the support plate along the first guide rail.

[0010] Preferably, the first linear drive assembly includes a first rotary driver, a support, a first screw, a threaded cylinder, and a rotating cylinder; the first rotary driver is disposed on the clamping block; the support is mounted on the clamping block, the first screw is rotatably disposed on the support, and the first rotary driver is used to drive the first screw to rotate; the threaded cylinder and the rotating cylinder are respectively mounted on the first base plate and the second base plate, the first screw is threadedly connected to the threaded cylinder, and the first screw is slidably engaged with the rotating cylinder.

[0011] Preferably, the detection module includes a bracket, on which a detector for detecting the transmittance of the sample is mounted; and a light source is mounted on the mounting base.

[0012] Preferably, the frame is provided with a second guide rail, and the mounting base is slidably mounted on the second guide rail; the frame is provided with a second linear drive assembly for controlling the sliding of the mounting base along the second guide rail.

[0013] Preferably, the second linear drive assembly includes a second rotary driver and a second screw; the second rotary driver is mounted on a frame; the second screw is rotatably mounted on the frame, and the second rotary driver is used to drive the second screw to rotate; a base is provided at the bottom of the mounting base, and the second screw is threadedly connected to the base.

[0014] Preferably, a third screw is connected to the cleaning strip, and adjusting nuts that are threadedly connected to the third screw are rotatably provided on both the first and second base plates; guide rods that are slidably provided on the first and second base plates and connected to the cleaning strip are also provided.

[0015] Preferably, the cleaning strip is provided with an inlet pipe for conveying cleaning fluid.

[0016] The advantages of this invention application compared to the prior art are:

[0017] 1. This invention application achieves stable sample support when testing samples of different sizes through a frame, mounting base, clamping mechanism, and detection module. When the clamping mechanism holds samples of different sizes, it drives the support plate to extend and retract synchronously. As long as the clamping mechanism can clamp the sample tightly, it can stably support samples of different sizes through the support plate. The support plate helps to keep the sample in a flat state, solving the problem of the sample sagging in the middle under gravity, which affects the detection accuracy.

[0018] 2. This invention utilizes a linear actuator and clamping blocks to clamp the sample. The guide rails on the clamping blocks, in conjunction with a support plate, move the support plate. The linear actuator drives the clamping blocks on both sides to open and close, controlling the extension and retraction of the support plate, thus automatically adjusting its length. During testing, the operator first places the sample on the mounting base and then secures it using the clamping mechanism. During this process, the clamping mechanism extends and retracts the support plate, providing stable support for the sample. The support plate prevents the middle portion of the sample from sagging and deforming under gravity. After securing the sample, the operator performs transmittance testing using the detection module.

[0019] 3. This invention utilizes a cleaning strip and a first linear drive assembly to clean the lower surface of the sample, avoiding the problem of impurities adhering to the sample surface affecting detection accuracy. The operator first places the sample on the mounting base and then fixes it using a clamping mechanism. At this time, the lower surface of the sample is obscured by the mounting base, making cleaning difficult. The first linear drive assembly on the clamping blocks drives the support plate to move. The first linear drive assemblies on the two clamping blocks respectively drive the first substrates of the two support plates to move. The first substrate drives the second substrate to move via guide bars, and then the cleaning strips on the first and second substrates clean the lower surface of the sample. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a polycarbonate sheet transmittance testing device during sample fixing, as described in this invention application.

[0021] Figure 2 This is a three-dimensional schematic diagram of a polycarbonate sheet transmittance testing device in a non-operating state, as described in this invention application.

[0022] Figure 3 This is a three-dimensional schematic diagram of the mounting base and clamping mechanism of a polycarbonate sheet transmittance testing device according to the present invention.

[0023] Figure 4 This is a three-dimensional schematic diagram of the support plate of a polycarbonate sheet transmittance testing device according to the present invention.

[0024] Figure 5This is a three-dimensional schematic diagram of the clamping block and the first linear drive assembly of a polycarbonate sheet transmittance detection device according to the present invention.

[0025] Figure 6 This is a three-dimensional schematic diagram of the mounting base, clamping mechanism, and detection mechanism of a polycarbonate sheet transmittance testing device according to the present invention.

[0026] Figure 7 This is an exploded perspective view of the second linear drive assembly, mounting base, and clamping mechanism of a polycarbonate sheet transmittance testing device according to the present invention.

[0027] Figure 8 This is an exploded perspective view of the support plate of a polycarbonate sheet transmittance testing device according to the present invention.

[0028] Figure 9 This is the application of this invention. Figure 8 A magnified view of a portion of point A in the middle.

[0029] Figure 10 This is a three-dimensional schematic diagram of the second substrate of a polycarbonate sheet transmittance testing device according to the present invention.

[0030] The diagram is labeled as follows: 1. Frame; 11. Mounting base; 111. Light source; 12. Support plate; 121. First base plate; 1211. Guide bar; 1212. Threaded cylinder; 122. Second base plate; 1221. Rotary drum; 123. Cleaning bar; 1231. Third screw; 1232. Liquid inlet pipe; 124. Adjusting nut; 125. Guide rod; 13. Second guide rail; 2. Clamping mechanism; 21. Linear actuator; 22. Clamping block; 221. First guide rail; 23. First linear drive assembly; 231. First rotary actuator; 232. Support; 233. First screw; 234. Pulley; 235. Synchronous belt; 3. Detection module; 31. Bracket; 311. Detector; 32. Second linear drive assembly; 321. Second rotary actuator; 322. Second screw; 323. Base; 4. Sample. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1-3A polycarbonate sheet transmittance testing device includes a frame 1, a mounting base 11 for supporting a sample 4 on the frame 1, a clamping mechanism 2 for fixing the sample 4 on the mounting base 11, a support plate 12 for supporting the sample 4 on the mounting base 11, and the support plate 12 can extend and retract synchronously along its length direction as the clamping mechanism 2 clamps; and a testing module 3 for testing the sample 4 is provided on the frame 1.

[0033] This invention utilizes a frame 1, a mounting base 11, a clamping mechanism 2, and a detection module 3 to stably support samples 4 of different sizes during testing. When the clamping mechanism 2 holds samples 4 of different sizes, it synchronously extends and retracts the support plate 12. As long as the clamping mechanism 2 can clamp the sample 4, it can stably support samples 4 of different sizes through the support plate 12. The support plate 12 helps maintain the sample 4 in a straight position, solving the problem of the sample 4 sagging in the middle under gravity, which affects detection accuracy. During testing, the operator first places the sample 4 on the mounting base 11, and then fixes the sample 4 using the clamping mechanism 2. During this process, the clamping mechanism 2 extends and retracts the support plate 12, thus stably supporting the sample 4. The support plate 12 prevents the middle part of the sample 4 from sagging and deforming under gravity. After fixing, the operator then uses the detection module 3 to perform transmittance testing.

[0034] Reference Figure 1 and Figure 3 The clamping mechanism 2 includes a linear driver 21 and a clamping block 22. The linear driver 21 is mounted on the mounting base 11, and the driving end of the linear driver 21 is connected to the clamping block 22. The clamping block 22 is provided with a first guide rail 221 extending in the horizontal direction, and the support plate 12 is slidably engaged with the first guide rail 221.

[0035] This invention utilizes a linear actuator 21 and clamping blocks 22 to clamp the sample 4. The first guide rail 221 on the clamping blocks 22, in cooperation with the support plate 12, moves the support plate 12. As the linear actuator 21 drives the clamping blocks 22 on both sides to open and close, the support plate 12 extends and retracts, achieving automatic adjustment of its length. The linear actuator 21 is a hydraulic rod, and two clamping blocks 22 are provided, located on opposite sides of the mounting base 11. The first guide rail 221 can be a linear groove or a linear rail. A controller for human-machine interaction is provided on the frame 1, and the linear actuator 21 is electrically connected to the controller. The operator places the sample 4 on the mounting base 11 and then sends a signal to the linear actuator 21 via the controller. Upon receiving the signal, the linear actuator 21 drives the clamping blocks 22 to move, fixing the sample 4 by opening and closing the clamping blocks 22. After fixing, the light transmittance of the sample 4 is detected by the detection module 3.

[0036] Reference Figure 3 and Figure 4 The support plate 12 includes a first substrate 121 and a second substrate 122; the first substrate 121 is provided with a guide strip 1211 that slides and engages with the second substrate 122.

[0037] This invention utilizes a first substrate 121, a second substrate 122, and a guide bar 1211 to support the sample 4. Furthermore, the guide bar 1211 guides the support plate 12 to stably extend and retract, thus accommodating samples 4 of different sizes. The first substrate 121 and the second substrate 122 respectively engage with two clamping blocks 22. When the linear actuator 21 drives the clamping blocks 22 to open and close, the two clamping blocks 22 respectively move the first substrate 121 and the second substrate 122, achieving the effect of controlling the extension and retraction of the support plate 12.

[0038] Reference Figure 3 and Figure 4 The top of the first substrate 121 and the second substrate 122 are provided with cleaning strips 123 for cleaning the sample 4; the clamping block 22 is provided with a first linear drive assembly 23 for controlling the support plate 12 to move along the first guide rail 221.

[0039] This invention utilizes a cleaning strip 123 and a first linear drive assembly 23 to clean the lower surface of sample 4, preventing impurities adhering to the sample 4 from affecting detection accuracy. The first linear drive assembly 23 is electrically connected to the controller. In operation, the operator first places sample 4 on the mounting base 11 and then fixes it using the clamping mechanism 2. At this time, the lower surface of sample 4 is obstructed by the mounting base 11, making cleaning difficult. The first linear drive assembly 23 on the clamping block 22 drives the support plate 12 to move. The first linear drive assemblies 23 on the two clamping blocks 22 respectively drive the first substrates 121 of the two support plates 12 to move. The first substrate 121 drives the second substrate 122 to move via guide strips 1211, and then the cleaning strips 123 on the first substrate 121 and the second substrate 122 clean the lower surface of sample 4. The upper surface of sample 4 is exposed, allowing the operator to easily wipe and clean it.

[0040] Reference Figure 4 and Figure 5The first linear drive assembly 23 includes a first rotary driver 231, a support 232, a first screw 233, a threaded cylinder 1212, and a rotating cylinder 1221. The first rotary driver 231 is mounted on the clamping block 22. The support 232 is mounted on the clamping block 22, and the first screw 233 is rotatably mounted on the support 232. The first rotary driver 231 is used to drive the first screw 233 to rotate. The threaded cylinder 1212 and the rotating cylinder 1221 are respectively mounted on the first base plate 121 and the second base plate 122. The first screw 233 is threadedly connected to the threaded cylinder 1212, and the first screw 233 is slidably engaged with the rotating cylinder 1221.

[0041] This invention utilizes a first rotary actuator 231, a support 232, a first screw 233, a threaded cylinder 1212, and a rotating cylinder 1221 to drive the movement of a support plate 12. The first base plate 121 and the second base plate 122 of the support plate 12 are slidably engaged with the first guide rails 221 on the two clamping blocks 22, respectively. Simultaneously, the threaded cylinder 1212 on the first base plate 121 is threadedly connected to the first screw 233, and the rotating cylinder 1221 on the second base plate 122 is slidably engaged with the first screw 233 on the other clamping block 22. The threaded cylinder 1212 and the rotating cylinder 1221 provide support for the support plate 12. The first rotary actuator 231 is preferably a servo motor and is electrically connected to a controller. A pulley 234 is fitted onto both the drive end of the first rotary actuator 231 and the first screw 233. A synchronous belt 235 is fitted onto each pulley 234, connecting the two pulleys 234. After the sample 4 is fixed by the clamping mechanism 2, the controller sends a signal to the first rotary driver 231. The first rotary driver 231 drives the first screw 233 to rotate via the pulley 234 and the timing belt 235. The first screw 233 drives the threaded cylinder 1212 connected to it to move. The threaded cylinder 1212 drives the first substrate 121 to move, and the first substrate 121 drives the second substrate 122 to move. During this process, the rotating cylinder 1221 on the second substrate 122 slides along another first screw 233.

[0042] Reference Figure 1 , Figure 2 and Figure 6 The detection module 3 includes a bracket 31, on which a detector 311 for detecting the transmittance of sample 4 is provided; a light source 111 is provided on the mounting base 11.

[0043] This invention utilizes a detector 311 and a light source 111 to detect the transmittance of a sample 4. The detector 311 is preferably a spectrophotometer, and both the detector 311 and the light source 111 are electrically connected to a controller. The operator places the sample 4 onto the mounting base 11, then secures it using a clamping mechanism 2. The first linear drive assembly 23 on the clamping blocks 22 drives the support plate 12 to move. The first linear drive assemblies 23 on the two clamping blocks 22 respectively drive the first substrates 121 of the two support plates 12 to move. The first substrate 121 moves the second substrate 122 via guide bars 1211, and the sample 4 is then cleaned by cleaning strips 123 on the first and second substrates 121 and 122. At this time, the light source 111 is located below the sample 4, and the detector 311 is located above the sample 4. The light source 111 on the mounting base 11 is then turned on, and the transmittance of the sample 4 is detected by the detector 311 above the sample 4.

[0044] Reference Figure 1 , Figure 2 and Figure 6 The frame 1 is provided with a second guide rail 13, and the mounting base 11 is slidably mounted on the second guide rail 13; the frame 1 is provided with a second linear drive assembly 32 for controlling the mounting base 11 to slide along the second guide rail 13.

[0045] This invention utilizes a second guide rail 13 and a second linear drive assembly 32 to control the movement of the mounting base 11. The second linear drive assembly 32 is electrically connected to a controller. The operator places the sample 4 onto the mounting base 11, and then controls two clamping blocks 22 to move closer together via a linear actuator 21, clamping the sample 4. Next, the first linear drive assembly 23 controls the movement of the first substrate 121 and the second substrate 122. The sample 4 is cleaned using cleaning strips 123 on the first substrate 121 and the second substrate 122. Then, the second linear drive assembly 32 controls the mounting base 11 to move along the second guide rail 13 until the sample 4 on the mounting base 11 is below the detector 311. The light source 111 on the mounting base 11 is then activated, and the transmittance of the sample 4 is detected by the detector 311 on the support 31.

[0046] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 The second linear drive assembly 32 includes a second rotary driver 321 and a second screw 322; the second rotary driver 321 is mounted on the frame 1; the second screw 322 is rotatably mounted on the frame 1, and the second rotary driver 321 is used to drive the second screw 322 to rotate; the bottom of the mounting base 11 is provided with a base 323, and the second screw 322 is threadedly connected to the base 323.

[0047] This invention utilizes a second rotary actuator 321, a second screw 322, and a base 323 to drive the mounting base 11 to move. The second rotary actuator 321 is preferably a servo motor and is electrically connected to a controller. The operator fixes the sample 4 onto the mounting base 11, and then sends a signal to the second rotary actuator 321 via the controller. The second rotary actuator 321 drives the second screw 322 to rotate, which in turn drives the base 323, which is threadedly connected to it, to move along the second guide rail 13. The base 323 then moves the mounting base 11 until the sample 4 is positioned below the detector 311, where its transmittance is measured.

[0048] Reference Figure 8 and Figure 9 A third screw 1231 is connected to the cleaning strip 123. Adjusting nuts 124 that are threadedly connected to the third screw 1231 are rotatably provided on the first substrate 121 and the second substrate 122. Guide rods 125 that are connected to the cleaning strip 123 are slidably provided on the first substrate 121 and the second substrate 122.

[0049] This invention utilizes a third screw 1231 and an adjusting nut 124 to adjust the height of the cleaning strip 123. For samples 4 of varying thicknesses, it is necessary to adjust the distance between the sample 4 and the light source 111, and the distance between the sample 4 and the detector 311. Therefore, a third screw 1231 and an adjusting nut 124 are provided for adjusting the height of the cleaning strip 123. During adjustment, the operator uses a wrench or other tools to rotate the adjusting nut 124. The third screw 1231 is threadedly connected to the adjusting nut 124, and the guide rod 125 guides and limits the movement, allowing the cleaning strip 123 to rise and fall stably in the vertical direction.

[0050] Reference Figure 10 The cleaning strip 123 is equipped with an inlet pipe 1232 for conveying cleaning fluid.

[0051] This invention utilizes an inlet pipe 1232 to deliver cleaning fluid to a cleaning strip 123. The cleaning fluid is isopropanol, and the cleaning strip 123 is wrapped with non-woven fabric. During cleaning, isopropanol is introduced into the cleaning strip 123 on one of the support plates 12 through the inlet pipe 1232. First, a first rotary actuator 231 drives a first screw 233 to rotate, controlling the cleaning strip 123, which has absorbed the isopropanol, to wipe and clean the sample 4. After cleaning, the cleaning strip 123 is reset. Then, a first linear drive assembly 23 on another clamp 22 controls the movement of another support plate 12, allowing the dried cleaning strip 123 on this support plate 12 to wipe the sample 4, absorbing excess isopropanol. Isopropanol is a highly volatile solvent; it evaporates completely within 10-30 seconds after wiping at room temperature, and the remaining small amount of isopropanol evaporates quickly, achieving rapid cleaning of the sample 4.

[0052] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A device for detecting the light transmittance of polycarbonate sheets, characterized in that, Includes a frame (1), on which a mounting base (11) for carrying a sample (4) is provided, and on which a clamping mechanism (2) for fixing the sample (4) is provided; The mounting base (11) is provided with a support plate (12) for supporting the sample (4), and the support plate (12) can extend and retract synchronously along its length direction as the clamping mechanism (2) performs its clamping action. The frame (1) is equipped with a detection module (3) for detecting the sample (4); The clamping mechanism (2) includes a linear actuator (21) and a clamping block (22). The linear actuator (21) is mounted on the mounting base (11), and the drive end of the linear actuator (21) is connected to the clamp (22); The clamping block (22) is provided with a first guide rail (221) extending in the horizontal direction, and the support plate (12) slides in cooperation with the first guide rail (221); The support plate (12) includes a first substrate (121) and a second substrate (122); The first substrate (121) is provided with a guide bar (1211) that slides with the second substrate (122). The top of the first substrate (121) and the second substrate (122) are both provided with cleaning strips (123) for cleaning the sample (4). The clamp (22) is provided with a first linear drive assembly (23) for controlling the support plate (12) to move along the first guide rail (221).

2. The polycarbonate sheet transmittance testing device according to claim 1, characterized in that, The first linear drive assembly (23) includes a first rotary driver (231), a support (232), a first screw (233), a threaded cylinder (1212), and a rotating cylinder (1221). The first rotary actuator (231) is mounted on the clamp (22); The support (232) is mounted on the clamp (22), the first screw (233) is rotatably mounted on the support (232), and the first rotary driver (231) is used to drive the first screw (233) to rotate; The threaded cylinder (1212) and the rotating cylinder (1221) are respectively mounted on the first base plate (121) and the second base plate (122). The first screw (233) is threadedly connected to the threaded cylinder (1212) and the first screw (233) is slidably engaged with the rotating cylinder (1221).

3. The polycarbonate sheet transmittance testing device according to claim 1, characterized in that, The detection module (3) includes a support (31), on which a detector (311) for detecting the transmittance of the sample (4) is provided. A light source (111) is provided on the mounting base (11).

4. The polycarbonate sheet transmittance testing device according to claim 3, characterized in that, The frame (1) is provided with a second guide rail (13), and the mounting base (11) is slidably mounted on the second guide rail (13); The frame (1) is provided with a second linear drive assembly (32) for controlling the mounting base (11) to slide along the second guide rail (13).

5. The polycarbonate sheet transmittance testing device according to claim 4, characterized in that, The second linear drive assembly (32) includes a second rotary driver (321) and a second screw (322); The second rotary drive (321) is mounted on the frame (1); The second screw (322) is rotatably mounted on the frame (1), and the second rotary driver (321) is used to drive the second screw (322) to rotate; The bottom of the mounting base (11) is provided with a base (323), and the second screw (322) is threadedly connected to the base (323).

6. The polycarbonate sheet transmittance testing device according to claim 1, characterized in that, A third screw (1231) is connected to the cleaning strip (123), and an adjusting nut (124) that is threadedly connected to the third screw (1231) is rotatably provided on the first substrate (121) and the second substrate (122). Guide rods (125) connected to cleaning strips (123) are slidably disposed on the first substrate (121) and the second substrate (122).

7. The polycarbonate sheet transmittance testing device according to claim 1, characterized in that, The cleaning strip (123) is provided with an inlet pipe (1232) for conveying cleaning fluid.

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