Automatic detection equipment for wiping decoloration test and detection method thereof

Abstract

The invention provides automatic detection equipment for a wiping decoloration test and a detection method thereof, and belongs to the technical field of machinery. The automatic detection equipment for the wiping decoloration test comprises a base, and a clamping assembly used for clamping an object to be detected is arranged on the base in a sliding mode; the wiping assembly is mounted on the base, and the wiping assembly is used for carrying out a wiping test on the to-be-tested object on the clamping assembly; degreasing cotton is detachably mounted on the wiping assembly; and the reciprocating driving assembly is connected with the clamping assembly and is used for driving the to-be-detected object on the clamping assembly to move back and forth relative to the wiping assembly. The device has the advantages of being convenient to test and stable in wiping force value and wiping speed.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, in particular to an automatic detection device for a wiping discoloration test and a detection method thereof. Background Art

[0002] According to GB 31604.7-2023 "National Food Safety Standard - Discoloration Test for Food Contact Materials and Products", food contact plastic materials and products with added colorants must meet the discoloration test indicators. The test consists of two parts: immersion liquid coloring and wiping discoloration. The wiping discoloration operation is as follows: use absorbent cotton saturated with food simulant, and the experimenter wipes back and forth 100 times at a speed of about 1 time / s on an area of approximately 4 cm×2 cm of the sample to be tested with a wiping force of 1.0 kg±0.2 kg (one round of back and forth of the absorbent cotton in the test direction of the sample is counted as 1 wipe), thereby obtaining the wiped absorbent cotton.

[0003] The entire wiping process is mainly affected by two factors: one is the stability of the wiping force value, and the other is the wiping speed. However, due to the subjectivity of the experimenter, it is difficult to always maintain a constant wiping force value and speed during the operation, which can easily lead to different results when different experimenters or the same experimenter tests the same sample. In addition, the experimenter needs to undergo wiping practice and pass the ability confirmation before the wiping force value of the operation can meet the test requirements. The laboratory also needs to regularly review the wiping ability of the experimenter, which undoubtedly increases the internal management cost of the laboratory. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems in the existing technology and propose an automatic detection device and detection method for wiping discoloration test, which has the characteristics of convenient testing, stable wiping force value and wiping speed.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An automatic detection device for a wipe discoloration test, comprising:

[0007] A base, on which a clamping assembly for clamping the object to be measured is slidably provided;

[0008] A wiping assembly is mounted on the base and is used to perform a wiping test on the object to be tested on the clamping assembly; absorbent cotton is detachably mounted on the wiping assembly;

[0009] A reciprocating drive assembly is connected to the clamping assembly and is used to drive the object to be tested on the clamping assembly to move back and forth relative to the wiping assembly.

[0010] In the above-mentioned automatic detection equipment for wiping and discoloration test, the clamping assembly includes a first clamping part and a second clamping part. The first clamping part has a placing part and a clamping plate. The placing part is provided with at least one first guide groove and at least one second guide groove. The second clamping part is fixed with a sliding part. The sliding part is slidably arranged in the first guide groove. The sliding part is provided with a guide groove; a baffle is fixed to the end of the guide groove away from the second clamping part, and a spring is provided in the guide groove. One end of the spring rests on the baffle, and the other end is connected to the inner wall of the first guide groove. The second clamping part also has a connecting part, and the connecting part is slidably installed in the second guide groove.

[0011] In the above-mentioned automatic detection equipment for wiping discoloration test, a guide hole is opened on the base, a guide rod is fixed on the base, a slider is slidably provided on the guide rod, and the first clamping part is fixed on the slider.

[0012] In the above-mentioned automatic detection equipment for wiping and discoloration test, the reciprocating drive assembly includes a driving motor, a rotating wheel, a connecting rod, a guide rail, and a fixed rod, and the fixed rod is fixed to the lower part of the connecting part; the lower end of the fixed rod is arranged on the guide rail and can slide relative to the guide rail, and a guide hole is provided on the guide rail; one end of the connecting rod is connected to the lower end of the fixed rod through a first rotating shaft, and the first rotating shaft passes through the guide hole; the rotating wheel is coaxially fixed to the output shaft of the driving motor, and the other end of the connecting rod is eccentrically connected to the rotating wheel through a second rotating shaft.

[0013] In the above-mentioned automatic detection equipment for wiping and discoloration test, the wiping assembly includes a mounting rod, a swing rod, a connecting column, a wiping head, a clamp, and a counterweight. The mounting rod is fixed on the base; the swing rod is rotatably connected to the mounting rod and can swing up and down relative to the mounting rod, and the connecting column is fixed to the end of the swing rod; the wiping head is fixed to the lower end of the connecting column, and the clamp is installed on the wiping head, and the clamp is used to fix the absorbent cotton on the wiping head; the counterweight is detachably fixed on the connecting column, and the counterweight and the clamp are distributed at both ends of the connecting column.

[0014] In the above automatic detection equipment for wiping discoloration test, the wiping head has a square wiping surface.

[0015] In the above-mentioned automatic detection equipment for wiping discoloration test, the clamp is a double-loop elastic clamp.

[0016] In the above-mentioned automatic detection equipment for wiping and discoloration test, the mounting rod includes a fixing part and a resting part, the fixing part is fixed on the base, the resting part is connected to the fixing part and forms an angle of 120-140 with the fixing part, and the swing rod flips upward and can rest on the resting part, so that the wiping head is separated from the clamping assembly and exposed upward.

[0017] In the above-mentioned automatic detection equipment for wiping and discoloration test, the abutment part includes two plates, a first fixed pin and a second fixed pin are installed between the two plates, and the swing arm is rotatably connected to the first fixed pin. When the swing arm is flipped upward, the swing arm can partially enter between the two plates and abut against the second fixed pin.

[0018] In the above-mentioned automatic detection equipment for wiping discoloration test, in the working state, the connecting column is perpendicular to the placement portion of the first clamping portion.

[0019] The above-mentioned automatic detection equipment for wiping discoloration test further includes a box body, the base and the reciprocating drive assembly are installed on the box body, and the box body is provided with an operation panel.

[0020] Compared with the prior art, this application has the following advantages:

[0021] In this application, the object to be tested is first placed in the clamping assembly on the base, and the clamping assembly is used to ensure that the object to be tested is stably fixed in the test position. Subsequently, the reciprocating drive assembly is started, and the clamping assembly is driven to perform reciprocating linear motion according to the preset setting. The specified test area of the object to be tested is about 4cm×2cm, and it is wiped back and forth at a speed of about 1 time / s. After completing the preset number of wiping, the experimenter can take out the wiped absorbent cotton for subsequent testing and analysis. There is no need for a large number of experimenters to repeatedly practice wiping and confirm their abilities, and it also eliminates the need for the laboratory to regularly review the wiping abilities of personnel, which saves both manpower training costs and the complexity and cost investment of internal laboratory management. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereogram in this application;

[0023] Figure 2 This is a three-dimensional structural diagram after the box body is removed in this application;

[0024] Figure 3 is a cross-sectional view of the first guide groove position in the clamping assembly of the present application;

[0025] Figure 4 is a cross-sectional view of the second guide groove position in the clamping assembly of the present application;

[0026] Figure 5 is a three-dimensional diagram of the second clamping portion in this application;

[0027] Figure 6 This is a three-dimensional structural diagram of the position of the connecting column in this application;

[0028] In the figure,

[0029] 2. Base; 21. Guide hole; 22. Guide rod; 23. Slider;

[0030] 3. Wiping assembly; 31. Mounting rod; 311. Fixing portion; 312. Abutting portion; 32. Swinging rod; 33. Connecting column; 34. Wiping head; 341. Wiping surface; 35. Clamp; 36. Counterweight;

[0031] 4. Reciprocating drive assembly; 41. Drive motor; 42. Rotating wheel; 43. Guide rail; 431. Guide hole; 44. Fixed rod; 45. Connecting rod; 46. First rotating shaft; 47. Second rotating shaft;

[0032] 5. Clamping assembly; 51. First clamping portion; 511. Placement portion; 5111. First guide groove; 5112. Second guide groove; 512. Clamping plate; 52. Second clamping portion; 521. Sliding portion; 5211. Guide groove; 5212. Baffle; 522. Connecting portion; 53. Spring;

[0033] 6. Box body; 61. Operation panel; 62. Adjustment feet; 63. Level. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] like Figures 1 to 6 As shown, an automatic detection equipment for wiping discoloration test includes: a base 2, a wiping assembly 3, and a reciprocating drive assembly 4. A clamping assembly 5 for clamping an object to be tested is slidably provided on the base 2; the wiping assembly 3 is installed on the base 2, and the wiping assembly 3 is used to wipe the object to be tested on the clamping assembly 5. An absorbent cotton is detachably installed on the wiping assembly 3; the reciprocating drive assembly 4 is connected to the clamping assembly 5, and is used to drive the object to be tested on the clamping assembly 5 to move back and forth relative to the wiping assembly 3.

[0036] In this application, the object to be tested is first placed in the clamping assembly 5 on the base 2, and the clamping assembly 5 ensures that the object to be tested is stably fixed in the test position. Then, the reciprocating drive assembly 4 is started, and the clamping assembly 5 is driven according to the preset to perform reciprocating linear motion. The specified test area of about 4 cm × 2 cm of the object to be tested is wiped back and forth at a speed of about 1 time / s. After completing the preset number of wiping, the experimenter can remove the wiped absorbent cotton for subsequent testing and analysis, wherein the absorbent cotton needs to be moistened with food simulant.

[0037] This application does not require a large number of experimental personnel to repeatedly conduct wiping exercises and ability confirmation, and also saves the laboratory from regularly reviewing the wiping ability of personnel, which not only saves manpower training costs, but also reduces the complexity and cost investment of internal laboratory management.

[0038] Specifically, the clamping assembly 5 includes a first clamping part 51 and a second clamping part 52. The first clamping part 51 has a placing part 511 and a clamping plate 512. The placing part 511 is provided with at least one first guide groove 5111 and at least one second guide groove 5112. The second clamping part 52 is fixed with a sliding part 521. The sliding part 521 is slidably arranged in the first guide groove 5111. The sliding part 521 is provided with a guide groove 5211; a baffle 5212 is fixed to the end of the guide groove 5211 away from the second clamping part, and a spring 53 is provided in the guide groove 5211. One end of the spring 53 rests on the baffle 5212, and the other end is connected to the inner wall of the first guide groove 5111. The second clamping part 52 also has a connecting part 522, and the connecting part 522 is slidably installed in the second guide groove 5112.

[0039] When it is necessary to clamp the object to be tested, the clamping plate 512 is pulled outward. At this time, the sliding part 521 slides in the first guide groove 5111, and the spring 53 is compressed, so that the distance between the second clamping part 52 and the clamping plate 512 increases, forming a placement space; the object to be tested is placed on the placement part 511, and the clamping plate 512 is released. The restoring force generated by the elastic deformation of the spring 53 pushes the second clamping part 52 and the clamping plate 512 closer together until the object to be tested is tightly clamped therebetween. During the entire wiping and decolorization test, the sliding of the sliding part 521 in the first guide groove 5111 plays a guiding role, ensuring that the second clamping part 52 moves smoothly, and the elastic force of the spring 53 maintains the clamping force, ensuring that the object to be tested will not be displaced during the operation of the equipment and can stably undergo the wiping test.

[0040] Through the action of the spring 53, the first clamping part 51 and the second clamping part 52 can adaptively adjust the clamping distance according to the different thicknesses of the object to be tested, without the need to replace the special clamp 35. It is compatible with food contact plastic materials and products of various sizes and specifications, greatly improving the versatility and practicality of the equipment.

[0041] When clamping the object to be tested, adsorption cotton is required to be provided on the first clamping part 51 and the second clamping part 52 to absorb the food simulant liquid squeezed out of the saturated absorbent cotton when the weight applies force. The adsorption cotton is designed to be a composite material, with the bottom surface being PVC waterproof cloth and the front surface being polyester fiber foam.

[0042] Specifically, a guide hole 21 is opened on the base 2 , a guide rod 22 is fixed on the base 2 , a slider 23 is slidably provided on the guide rod 22 , and the placement portion 511 is fixed on the slider 23 .

[0043] The slider 23 slides on the guide rod 22 , and can drive the first clamping portion 51 fixed thereon to freely adjust its position.

[0044] Specifically, the reciprocating drive assembly 4 includes a drive motor 41, a rotating wheel 42, a connecting rod 45, a guide rail 43, and a fixed rod 44. The fixed rod 44 is fixed to the lower part of the connecting part 522; the lower end of the fixed rod 44 is arranged on the guide rail 43 and can slide relative to the guide rail 43, and a guide hole 431 is provided on the guide rail 43; one end of the connecting rod 45 is connected to the lower end of the fixed rod 44 through a first rotating shaft 46, and the first rotating shaft 46 passes through the guide hole 431; the rotating wheel 42 is coaxially fixed to the output shaft of the driving motor 41, and the other end of the connecting rod 45 is eccentrically connected to the rotating wheel 42 through a second rotating shaft 47.

[0045] After the driving motor 41 is started, its output shaft drives the coaxially fixed wheel 42 to perform circular motion. The wheel 42 is eccentrically connected to the connecting rod 45 through the second rotating shaft 47. When the wheel 42 rotates, one end of the connecting rod 45 will swing in a circle around the second rotating shaft 47. The other end of the connecting rod 45 is connected to the fixed rod 44 through the first rotating shaft 46, and the first rotating shaft 46 passes through the guide hole 431 on the guide rail 43. Under the swinging action of the connecting rod 45, the first rotating shaft 46 moves along the trajectory of the guide hole 431, and then drives the fixed rod 44 to perform reciprocating linear sliding on the guide rail 43. Since the fixed rod 44 is connected to the connecting part 522, the slider 23 finally drives the clamping assembly 5 to move back and forth relative to the wiping assembly 3, and completes the wiping and decolorization test of the object to be tested clamped on the assembly at a set speed.

[0046] Specifically, the wiping assembly 3 includes a mounting rod 31, a swing rod 32, a connecting column 33, a wiping head 34, a clamp 35, and a counterweight 36. The mounting rod 31 is fixed on the base 2; the swing rod 32 is rotatably connected to the mounting rod 31 and can swing up and down relative to the mounting rod 31. The connecting column 33 is fixed to the end of the swing rod 32; the wiping head 34 is fixed to the lower end of the connecting column 33, and the clamp 35 is installed on the wiping head 34. The clamp 35 is used to fix the absorbent cotton on the wiping head 34; the counterweight 36 is detachably fixed on the connecting column 33, and the counterweight 36 and the clamp 35 are distributed at both ends of the connecting column 33.

[0047] When conducting the wiping decolorization test, the absorbent cotton saturated with the food simulant is first fixed on the wiping head 34 through the clamp 35. The counterweight 36 is detachably fixed on the connecting column 33 and is distributed at both ends of the connecting column 33 together with the clamp 35. The gravity of the counterweight 36 applies downward pressure to the wiping head 34 to meet the wiping force value requirements.

[0048] Specifically, the wiping head 34 has a square wiping surface 341. The wiping surface 341 is used to contact the object to be tested.

[0049] GB 31604.7-2023 stipulates that the wipe test area is approximately 4cm×2cm. The square wiping surface 341 can precisely match this standard area and can cover the standard test area of the object to be tested in one go. This reduces the problem of missing or repeated wiping of the test area due to the mismatch of the wiping surface 341 shape during the wiping process, ensures that the test data is complete and representative, and improves the accuracy of the test results.

[0050] Specifically, the clamp 35 is a double-loop elastic clamp.

[0051] By adopting the above technical solution, the fixation of the absorbent cotton can be completed simply and quickly. The double-circle elastic clamp design increases the tightness of the clamp, strengthens the absorbent cotton, and prevents the absorbent cotton from falling off from the wiping head 34.

[0052] Specifically, the mounting rod 31 includes a fixing portion 311 and a rest portion 312. The fixing portion 311 is fixed on the base 2. The rest portion 312 is connected to the fixing portion 311 and forms an angle of 120-140 with the fixing portion 311. The swing rod 32 flips upward and can rest on the rest portion 312, so that the wiping head 34 is separated from the clamping assembly 5 and exposed upward.

[0053] When the swing rod 32 flips upward and abuts against the abutment portion 312, the wiping head 34 is separated from the clamping assembly 5 and exposed upward. At this time, the experimenter can easily replace the absorbent cotton on the wiping head 34, or clean, inspect, etc. the wiping head 34. Compared with the state where the wiping head 34 is in a low position or close to the object to be tested, this upward exposure design greatly improves the openness of the operating space, reduces obstacles for the experimenter during operation, reduces the difficulty of operation, effectively shortens the time for experimental preparation and material replacement, and improves the overall experimental efficiency.

[0054] Specifically, the abutment portion 312 includes two plates, a first fixed pin and a second fixed pin are installed between the two plates, and the swing rod 32 is rotatably connected to the first fixed pin. When the swing rod 32 flips upward, the swing rod 32 can partially enter between the two plates and abut against the second fixed pin.

[0055] When the swing rod 32 is flipped upward, it can partially enter between the two plates and rest on the second fixed pin. This design provides a clear limit point for the swing rod 32, so that it can be accurately positioned in the non-working state, making it easy to disassemble or replace the cotton wool.

[0056] Specifically, in the working state, the wiping head 34 is perpendicular to the placement portion 511 of the first clamping portion 51 .

[0057] In the working state, the wiping head 34 is perpendicular to the placement portion 511 of the first clamping portion 51 , so that the pressure applied by the wiping head 34 can act perpendicularly on the surface of the object to be measured.

[0058] Specifically, the device also includes a housing 6, on which the base 2 and reciprocating drive assembly 4 are mounted. An operating panel 61 is provided on the housing 6. Adjustment feet 62 are provided at the four corners of the bottom of the housing 6 for adjusting the height of each corner of the housing 6. The side of the housing 6 is equipped with an operating panel 61 and function indicator lights, and a level 63 is provided in the upper left corner of the housing 6.

[0059] As a preferred embodiment, the operation panel 61 is a touch screen panel, which is provided with "times", "speed" parameter buttons, "start" button, "+ "," -" button and display screen, "Number" setting range is 0-200 times, click "Number" to start setting, "Speed" setting range is 0-2 times / s, click "Speed" to start setting, "+ "," -" button, set the target value according to the test parameter requirements, the display screen can show the current parameter setting value, "Start" execution button, click it to execute according to the currently set "Number" and "Speed" values, the countdown value of the "Number" parameter is displayed on the display screen, and at the same time "Start" changes to "Cancel". When the test is completed, "Cancel" changes to "Start".

[0060] By adopting the above technical solution, the two parameters required for the wiping decolorization test can be flexibly set: the number of wiping times and the wiping speed. The operation panel 61 is designed according to people's operating habits, is easy to understand, and is convenient for experimenters to use.

[0061] The function indicator lights are equipped with "power", "run" and "buzzer" indicators. When the switch is powered on, "power" is displayed in green, and "run" and "buzzer" are both displayed in yellow; when "start" is executed, "run" and "buzzer" turn from yellow to green; when the test is over, the "buzzer" turns from green to red and makes a sound, and the "run" turns from green to yellow. When the switch is powered off, the "power", "run" and "buzzer" indicators are all off. When a fault occurs, the "power" indicator turns red.

[0062] By adopting the above technical solution, it is convenient for experimenters to grasp the equipment status and observe the progress of the test according to the instructions, and it also serves to remind experimenters to control the test process.

[0063] Preferably, a level 63 is mounted in the upper left corner of the housing 6 and comprises a base, a level tube, an air bubble, and a marking ring. The base is made of black PP plastic and provides a rigid support structure. The level tube is a sealed, transparent tube filled with liquid and has a certain curvature, which is used to indicate horizontality. The air bubble is located in the liquid inside the level tube and is used to determine whether the device is level. The marking ring and the base are concentric rings.

[0064] By adopting the above technical solution, the experimenter can judge whether the device is in a horizontal state and ensure the horizontal movement of the wiping head 34. The experimenter can make the bubble in the center of the marking ring through the hexagonal bolt at the bottom of the box 6 to complete the leveling of the device.

[0065] An automatic detection method for a wipe discoloration test, comprising:

[0066] S1. Place the object to be tested on the clamping assembly 5, clamp it and fix it with the clamping assembly 5, and place polyester fiber foam on the clamping assembly;

[0067] S2. Start the reciprocating drive assembly 4 to drive the clamping assembly 5 to move back and forth relative to the wiping assembly 3, so that the object to be tested on the clamping assembly 5 contacts the absorbent cotton of the wiping assembly back and forth, and wipe back and forth at a speed of 1 time / s. After wiping 100 times, the wiped absorbent cotton can be removed for subsequent testing and analysis. The absorbent cotton needs to be moistened with the food simulant, and the polyester fiber foam is used to absorb the squeezed food simulant liquid.

[0068] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status between the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0069] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is to include three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0070] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0071] The specific embodiments described herein are merely illustrative of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the present invention or exceeding the scope of the appended claims.

Claims

1. An automatic detection device for wiping discoloration test, characterized in that: include: A base (2), wherein a clamping assembly (5) for clamping an object to be measured is slidably provided on the base (2); A wiping assembly (3), the wiping assembly (3) is mounted on the base (2), and the wiping assembly (3) is used to perform a wiping test on the object to be tested on the clamping assembly (5); absorbent cotton is detachably mounted on the wiping assembly (3); A reciprocating drive assembly (4), the reciprocating drive assembly (4) is connected to the clamping assembly (5) and is used to drive the object to be tested on the clamping assembly (5) to move back and forth relative to the wiping assembly (3).

2. The automatic detection equipment for wiping discoloration test according to claim 1, characterized in that: The clamping assembly (5) comprises a first clamping portion (51) and a second clamping portion (52). The first clamping portion (51) comprises a placement portion (511) and a clamping plate (512). The placement portion (511) is provided with at least one first guide groove (5111) and at least one second guide groove (5112). The second clamping portion (52) is fixed with a sliding portion (521). The sliding portion (521) is slidably disposed in the first guide groove (5111). The sliding portion (521) is provided with a plurality of guide grooves (5112). 1) is provided with a guide groove (5211); a baffle (5212) is fixed to one end of the guide groove (5211) away from the second clamping portion, a spring (53) is provided in the guide groove (5211), one end of the spring (53) abuts against the baffle (5212), and the other end is connected to the inner wall of the first guide groove (5111), and the second clamping portion (52) further has a connecting portion (522), and the connecting portion (522) is slidably installed in the second guide groove (5112).

3. The automatic detection equipment for wiping discoloration test according to claim 2, characterized in that: A guide hole (21) is provided on the base (2), a guide rod (22) is fixed on the base (2), a slider (23) is slidably provided on the guide rod (22), and the first clamping portion (51) is fixed on the slider (23).

4. The automatic detection equipment for wiping discoloration test according to claim 3, characterized in that: The reciprocating drive assembly (4) comprises a drive motor (41), a rotating wheel (42), a connecting rod (45), a guide rail (43), and a fixed rod (44), wherein the fixed rod (44) is fixed to the lower part of the connecting portion (522); the lower end of the fixed rod (44) is arranged on the guide rail (43) and can slide relative to the guide rail (43), and the guide rail (43) is provided with a guide hole (431); one end of the connecting rod (45) is connected to the lower end of the fixed rod (44) through a first rotating shaft (46), and the first rotating shaft (46) passes through the guide hole (431); the rotating wheel (42) is coaxially fixed to the output shaft of the drive motor (41), and the other end of the connecting rod (45) is eccentrically connected to the rotating wheel (42) through a second rotating shaft (47).

5. The automatic detection equipment for wiping discoloration test according to claim 1, characterized in that: The wiping assembly (3) comprises a mounting rod (31), a swing rod (32), a connecting column (33), a wiping head (34), a clamp (35), and a counterweight (36). The mounting rod (31) is fixed to the base (2); the swing rod (32) is rotatably connected to the mounting rod (31) and can swing up and down relative to the mounting rod (31); the connecting column (33) is fixed to the end of the swing rod (32); the wiping head (34) is fixed to the lower end of the connecting column (33); the clamp (35) is mounted on the wiping head (34), and the clamp (35) is used to fix the absorbent cotton on the wiping head (34); the counterweight (36) is detachably fixed to the connecting column (33), and the counterweight (36) and the clamp (35) are distributed at both ends of the connecting column (33).

6. The automatic detection equipment for wiping discoloration test according to claim 1, characterized in that: The mounting rod (31) comprises a fixing portion (311) and a supporting portion (312), wherein the fixing portion (311) is fixed to the base (2), and the supporting portion (312) is connected to the fixing portion (311) and forms an angle of 120-140 with the fixing portion (311). The swing rod (32) is tilted upward and can be supported on the supporting portion (312), so that the wiping head (34) is separated from the clamping assembly (5) and exposed upward.

7. The automatic detection equipment for wiping discoloration test according to claim 6, characterized in that: The abutting portion (312) includes two plates, a first fixed pin and a second fixed pin are installed between the two plates, and the swing rod (32) is rotatably connected to the first fixed pin. When the swing rod (32) flips upward, the swing rod (32) can partially enter between the two plates and abut against the second fixed pin.

8. The automatic detection equipment for wiping discoloration test according to claim 5, characterized in that: In the working state, the connecting column (33) is perpendicular to the placement portion (511) of the first clamping portion (51).

9. The automatic detection equipment for wiping discoloration test according to claim 1, characterized in that: It also includes a box body (6), the base (2) and the reciprocating drive assembly (4) are mounted on the box body (6), and an operating panel (61) is provided on the box body (6).

10. A detection method for the automatic detection device for wiping discoloration test according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, placing the object to be measured on the clamping component (5), clamping and fixing it by the clamping component (5), and placing polyester fiber foam on the clamping component (5); S2. Start the reciprocating drive assembly (4) to drive the clamping assembly (5) to move back and forth relative to the wiping assembly (3), so that the object to be tested on the clamping assembly (5) contacts the absorbent cotton on the wiping assembly (3) back and forth, and wipe back and forth at a speed of 1 time / s. After wiping 100 times, the wiped absorbent cotton can be taken out for subsequent detection and analysis, wherein the absorbent cotton needs to be moistened with the food simulant, and the polyester fiber foam is used to absorb the squeezed food simulant liquid.

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