Color measurement device, stand and control method therefor

Abstract

The application discloses a kind of color measurement equipment and its support and control method, it is related to the technical field of color measurement equipment, support includes: support table, installation bracket, first drive unit, detection unit and control unit, support table has the sample placement part to be measured;Installation bracket is set on support table, and installation bracket can be close to or away from the sample placement part to be measured along the first direction;Installation bracket has the mounting structure for installing colorimeter probe;First drive unit is set in installation bracket;First drive unit is configured to drive mounting structure to move along the first direction;Detection unit is set in installation bracket;Detection unit is configured to detect the pressure that colorimeter probe receives;Control unit is electrically connected with detection unit;Control unit is configured to control the operating state of first drive unit based on the pressure that colorimeter receives.The application can prevent the sample to be measured from being deformed under pressure, improve the accuracy of color measurement data.

Description

Technical Field

[0001] This invention relates to the technical field of colorimetric devices, and more specifically, to a colorimetric device, its support, and a control method thereof. Background Technology

[0002] Currently, color measurement relies on manually holding or using a simple fixed stand to move the colorimeter probe to contact the sample. However, during the contact process, excessive pressure from the colorimeter probe on the sample can cause deformation and lead to inaccurate colorimetric data. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a colorimetric device, its support and control method, which can prevent the sample to be tested from being deformed by pressure and improve the accuracy of colorimetric data.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The bracket for a colorimeter of the present invention includes: a support platform having a sample placement portion; a mounting bracket disposed on the support platform and capable of moving closer to or further away from the sample placement portion along a first direction; the mounting bracket having a mounting structure for mounting a colorimeter probe; a first driving unit disposed on the mounting bracket; the first driving unit configured to drive the mounting structure to move along the first direction; a detection unit disposed on the mounting bracket; the detection unit configured to detect the pressure exerted on the colorimeter probe and / or the sample; and a control unit electrically connected to the detection unit; the control unit configured to control the operating state of the first driving unit based on the pressure exerted on the colorimeter.

[0006] In some embodiments, the mounting bracket includes a frame body disposed on one side of the sample placement portion in the first direction;

[0007] The first drive unit is a telescopic rod, which is configured to be adjustable in size in the first direction; the first drive unit is connected between the frame and the mounting structure.

[0008] The detection unit is a pressure sensor, and the detection unit is disposed on the mounting structure and / or between the telescopic rod and the frame.

[0009] In some embodiments, the mounting bracket is movable in a second direction and is also movable upward in a third direction; wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to both the first and second directions.

[0010] In some embodiments, the support for the colorimeter further includes:

[0011] A first guide rail is disposed on the support platform; the first guide rail extends in the second direction.

[0012] The second guide rail is connected to the first guide rail and is movable relative to the first guide rail in the second direction; the second guide rail extends upward in the third direction; the mounting bracket is connected to the second guide rail and is movable relative to the second guide rail in the third direction.

[0013] In some embodiments, there are two second guide rails, which are arranged opposite to each other in the second direction, and the mounting bracket is connected between the two second guide rails;

[0014] There are two first guide rails, which are arranged opposite each other in the third direction, and the sample placement part is located between the two first guide rails; each second guide rail includes a first end and a second end opposite each other in the second direction, the first end being movable in the second direction to engage with one of the first guide rails, and the second end being movable in the second direction to engage with the other first guide rail;

[0015] A first locking element is provided between each of the first ends and the corresponding first guide rail, the first locking element being used to restrict the movement of the first end in the second direction; a second locking element is provided between each of the second ends and the corresponding first guide rail, the second locking element being used to restrict the movement of the second end in the second direction; and / or,

[0016] A third locking element is provided between the mounting bracket and the second guide rail, the third locking element being used to restrict the movement of the mounting bracket in the third direction.

[0017] In some embodiments, there are multiple first guide rails, and the multiple first guide rails are spaced apart in the first direction;

[0018] Each of the first guide rails is open at least one end in the second direction to allow the portion of the second guide rail connected to the first guide rail to disengage.

[0019] In some embodiments, the support for the colorimeter further includes:

[0020] A second actuator is disposed on the support platform; the second actuator is configured to drive the mounting bracket to move along the second direction.

[0021] A third actuator is disposed on the support platform; the third actuator is configured to drive the mounting bracket to move along the third direction.

[0022] A displacement sensor configured to measure the displacement of the mounting bracket in the second direction and / or in the second direction.

[0023] In some embodiments, the support platform is provided with an air extraction chamber, and the air extraction chamber has an air outlet connected to the outside; the outer surface of the sample placement part is provided with an air inlet, and the air inlet communicates with the air extraction chamber.

[0024] A fan is provided in the air extraction chamber, and the fan is configured to promote the formation of an airflow from the air inlet to the air outlet.

[0025] The colorimetric device of the present invention includes: a colorimeter having a probe; a bracket, which is the bracket described in any one of the above-mentioned methods, and the probe is mounted on the mounting structure.

[0026] The control method for the colorimetric device of the present invention, applied to the aforementioned colorimetric device, includes: acquiring displacement data of the colorimeter probe in the first direction based on the thickness of the sample to be tested; controlling the colorimeter probe to move closer to the sample placement part in the first direction based on the displacement data; acquiring pressure data on the colorimeter probe, determining whether the pressure data is greater than or equal to a preset pressure value; if so, controlling the colorimeter probe to stop moving or move a preset distance away from the sample placement part.

[0027] The bracket for a colorimeter in this embodiment of the invention has a mounting bracket disposed on a support platform. The mounting bracket has a first driving unit for driving its mounting structure to move along a first direction. The bracket in this embodiment also includes a detection unit and a control unit. The detection unit detects the pressure on the colorimeter probe, and the control unit controls the first driving unit based on the pressure data detected by the detection unit. This allows the control unit to control the first driving unit to perform corresponding actions (e.g., stopping the mounting structure from moving or driving the mounting structure to move away from the sample placement area) when the pressure on the colorimeter probe when in contact with the sample is high. Therefore, the bracket in this embodiment can prevent excessive pressure on the sample from the colorimeter probe, prevent deformation of the sample under pressure, and improve the accuracy of colorimetric data.

[0028] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a top view schematic structural diagram of the bracket according to an embodiment of the present invention.

[0031] Figure 2 This is a side view schematic structural diagram of the bracket according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic structural diagram of the mounting bracket according to an embodiment of the present invention.

[0033] Figure 4 This is a schematic structural diagram of the colorimetric device according to an embodiment of the present invention.

[0034] Figure 5 This is a schematic structural diagram of the bracket according to an embodiment of the present invention.

[0035] Figure 6 This is a schematic flowchart of the control method of the colorimetric device according to an embodiment of the present invention.

[0036] Figure label:

[0037] 10 brackets;

[0038] Support stage 100; Sample placement section 110;

[0039] Mounting bracket 200; first drive unit 210; frame 220;

[0040] Detection unit 300;

[0041] Control unit 400;

[0042] First guide rail 510; second guide rail 520; first end 521; second end 522; first locking member 531; second locking member 532;

[0043] Colorimeter probe 20. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] The bracket 10 for a colorimeter according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0046] like Figures 1-5 As shown, the bracket 10 for the colorimeter in this embodiment of the invention includes a support platform 100, a mounting bracket 200, a first drive unit 210, a detection unit 300, and a control unit 400.

[0047] The support platform 100 has a sample placement section 110. A mounting bracket 200 is disposed on the support platform 100 and is capable of moving closer to or further away from the sample placement section 110 along a first direction. The mounting bracket 200 has a mounting structure for mounting a colorimeter probe 20. A first drive unit 210 is disposed on the mounting bracket 200 and configured to drive the mounting structure to move along the first direction. A detection unit 300 is disposed on the mounting bracket 200 and configured to detect the pressure exerted on the colorimeter probe 20 and / or the sample. A control unit 400 is electrically connected to the detection unit 300 and is configured to control the operating state of the first drive unit 210 based on the pressure exerted on the colorimeter. The operating state of the first drive unit 210 may include driving the mounting structure to continue moving closer to the sample placement section 110, stopping the mounting structure from moving, and driving the mounting structure to move further away from the sample placement section 110.

[0048] The following describes a specific embodiment of the bracket 10 for a colorimeter according to an embodiment of the present invention with reference to the accompanying drawings. The colorimeter probe 20 is mounted on the mounting structure.

[0049] When measuring the color of the sample to be tested, the sample is placed on the sample placement section 110, and the position of the sample on the sample placement section 110 or the position of the mounting bracket 200 is adjusted so that the colorimeter probe 20 on the mounting bracket 200 corresponds to the color measurement area of ​​the sample. The first drive unit 210 drives the mounting structure to move closer to the sample placement section 110, thus moving the colorimeter probe 20 closer to the sample.

[0050] When the colorimeter probe 20 comes into contact with the sample to be tested, the probe 20 is subjected to pressure from the sample. The detection unit 300 monitors the pressure on the colorimeter probe 20 and / or the sample in real time. Based on the pressure data detected by the detection unit 300, the control unit 400 controls the operation of the first drive unit 210 to control the colorimeter probe 20 to continue moving closer to the sample, stop moving, or move away from the sample placement area 110. Especially when the pressure value detected by the detection unit 300 is high, the colorimeter probe 20 is controlled to stop moving or move away from the sample placement area 110 to prevent the sample from being deformed by pressure.

[0051] Compared with related technologies, the bracket 10 for a colorimeter in this embodiment of the invention has a mounting bracket 200 disposed on a support platform 100, and the mounting bracket 200 has a first driving unit 210 for driving its mounting structure to move along a first direction. The bracket 10 of this embodiment also includes a detection unit 300 and a control unit 400. The detection unit 300 detects the pressure on the colorimeter probe 20, and the control unit 400 controls the first driving unit 210 based on the pressure data detected by the detection unit 300. When the pressure of the colorimeter probe 20 in contact with the sample is high, the control unit 400 can control the first driving unit 210 to perform corresponding actions (e.g., stopping the mounting structure from moving or driving the mounting structure to move away from the sample placement part 110). Therefore, the bracket 10 of this embodiment can avoid excessive pressure on the sample from the colorimeter probe 20, prevent deformation of the sample under pressure, and improve the accuracy of colorimetric data.

[0052] To make this application easier to understand, the bracket 10 for a colorimeter according to an embodiment of the present invention will be further described below, taking the first direction as consistent with the up-down direction, the second direction as consistent with the front-back direction, and the third direction as consistent with the left-right direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to both the first and second directions.

[0053] In some embodiments, such as Figures 1-4 As shown, the mounting bracket 200 includes a frame 220, which is disposed on the upper side of the sample placement section 110. The first drive unit 210 is a telescopic rod configured to be adjustable in a first direction; the first drive unit 210 is connected between the frame 220 and the mounting structure. The detection unit 300 is a pressure sensor, disposed on the mounting structure and / or between the telescopic rod and the frame 220.

[0054] In other words, the detection unit 300 is mounted on the mounting structure; or, the detection unit 300 is positioned between the telescopic rod and the frame 220. When the detection unit 300 is mounted on the mounting structure, it contacts the upper surface of the colorimeter probe 20. When the lower surface of the colorimeter probe 20 contacts the sample to be tested, the pressure on the colorimeter probe 20 can be directly transmitted to the detection unit 300, enabling the detection unit 300 to monitor the pressure on the colorimeter probe 20 in real time. When the detection unit 300 is mounted on the mounting structure and / or between the telescopic rod and the frame 220, when the lower surface of the colorimeter probe 20 contacts the sample to be tested, the pressure on the colorimeter probe 20 can be transmitted to the detection unit 300 through the telescopic rod, enabling the detection unit 300 to monitor the pressure on the colorimeter probe 20 in real time.

[0055] Alternatively, the telescopic rod can be an electric cylinder; or, the telescopic rod can be a pneumatic cylinder; or, the telescopic rod can be other telescopic structures.

[0056] In some embodiments, the mounting structure is a universal clamp, which allows for fine adjustment of the tilt angle of the colorimeter probe 20 after three-dimensional coarse positioning, ensuring that the measuring end face of the colorimeter probe 20 is parallel to the surface of the sample to be measured.

[0057] Specifically, the universal clamp includes a universal connector and a clamp. The two ends of the universal connector are connected to the frame 220 and the clamp, respectively. The universal connector includes a fixed seat and a movable seat. The fixed seat 211 is connected to the frame 220, and the movable seat is connected to the clamp. The fixed seat has a ball joint mounting cavity and a ball joint locking mechanism. The movable seat has a connecting rod, and the end of the connecting rod has a ball joint, which is installed in the ball joint mounting cavity. The ball joint locking mechanism is a bolt. The ball joint mounting cavity has a threaded through hole, allowing the bolt to be screwed in or pushed in the threaded through hole. During the screwing process, the bolt abuts against the ball joint.

[0058] In other embodiments, the mounting structure is a plate with a mounting cavity and a through hole. The colorimeter probe 20 is placed directly on the plate, and its probe portion is installed in the through hole. The detection unit 300 is disposed on the plate, and the lower surface of the detection unit 300 is flush with the lower surface of the probe portion, so that the detection unit 300 detects the pressure on the sample when the probe portion contacts the sample to be tested.

[0059] Furthermore, a buffer pad is provided on the lower surface of the detection unit 300. The buffer pad is a flexible structure, such as rubber. This buffer pad is used to prevent the detection unit 300 from applying excessive pressure to the sample to be tested.

[0060] In some embodiments, such as Figures 1-4As shown, the mounting bracket 200 can move in the front-to-back direction and in the left-to-right direction, so that the relative position of the mounting bracket 200 and the sample placement part 110 in the horizontal direction can be adjusted so that the mounting bracket 200 corresponds to the color measurement area of ​​the sample to be tested.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, the support 10 for the colorimeter in this embodiment of the invention further includes a first guide rail 510 and a second guide rail 520. The first guide rail 510 is disposed on the support platform 100 and extends in the front-to-back direction. The second guide rail 520 is connected to the first guide rail 510 and is movable relative to the first guide rail 510 in the front-to-back direction, and extends in the left-to-right direction. The mounting bracket 200 is connected to the second guide rail 520 and is movable relative to the second guide rail 520 in the left-to-right direction. Thus, the first guide rail 510 and the second guide rail 520 guide the mounting bracket 200, making its horizontal movement more precise and improving the detection effect of the colorimeter.

[0062] Furthermore, such as Figure 1 and Figure 2 As shown, there are two second guide rails 520, which are arranged opposite each other in the front-to-back direction, and the mounting bracket 200 is connected between the two second guide rails 520. There are also two first guide rails 510, which are arranged opposite each other in the left-to-right direction, and the sample placement part 110 is located between the two first guide rails 510. Each second guide rail 520 includes a first end 521 and a second end 522 that are opposite each other in the front-to-back direction. The first end 521 is movable in the front-to-back direction and engages with one first guide rail 510, and the second end 522 is movable in the front-to-back direction and engages with the other first guide rail 510. A first locking member 531 is provided between each first end 521 and the corresponding first guide rail 510 to restrict the movement of the first end 521 in the second direction; a second locking member 532 is provided between each second end 522 and the corresponding first guide rail 510 to restrict the movement of the second end 522 in the second direction. Therefore, after the second guide rail 520 moves into place in the front-back direction, the first locking member 531 and the second locking member 532 are used to lock the second guide rail 520 to prevent the second guide rail 520 from moving.

[0063] Specifically, both the first locking member 531 and the second locking member 532 are bolts, with threaded through holes provided on the first end 521 and the second end 522, respectively. The first locking member 531 and the second locking member 532 are threadedly connected to the two threaded through holes. When the second guide rail 520 needs to be moved, the bolts can be loosened to allow the second guide rail 520 to move smoothly in the front-back direction; after the second guide rail 520 is in place, the bolts can be tightened so that the bolts abut against the first guide rail 510, and the second guide rail 520 is locked by the friction between the bolts and the first guide rail 510.

[0064] Furthermore, a third locking element is provided between the mounting bracket 200 and the second guide rail 520. The third locking element is used to restrict the movement of the mounting bracket 200 in the third direction. Thus, after the mounting bracket 200 moves into place in the left-right direction, the third locking element locks the second guide rail 520, preventing the mounting bracket 200 from moving.

[0065] Specifically, the third locking element is a bolt, and the mounting bracket 200 is provided with a threaded through hole, in which the third locking element is threadedly connected. When the mounting bracket 200 needs to be moved, the bolt can be loosened to allow the mounting bracket 200 to move smoothly in the left and right directions; after the mounting bracket 200 is moved into place, the bolt can be tightened so that it abuts against the second guide rail 520, and the mounting bracket 200 is locked by the friction between the bolt and the second guide rail 520.

[0066] In some embodiments, there are multiple first guide rails 510, which are spaced apart in the vertical direction. At least one end of each first guide rail 510 is open in the second direction, allowing the portion of the second guide rail 520 connected to the first guide rail 510 to detach. This allows the second guide rail 520 to be detached from the open end of any of the multiple first guide rails 510 and to engage with any of them, enabling the first guide rails 510 and the mounting bracket 200 to operate at different heights. Therefore, when the thickness of the sample to be tested varies significantly, the bracket 10 of this embodiment can adapt to samples of different thicknesses.

[0067] In some embodiments, the bracket 10 for a colorimeter according to this invention further includes a second driver, a third driver, and a displacement sensor. The second driver is disposed on the support platform 100 and configured to drive the mounting bracket 200 to move in the front-to-back direction. The third driver is disposed on the support platform 100 and configured to drive the mounting bracket 200 to move in the left-to-right direction. The displacement sensor is configured to measure the displacement of the mounting bracket 200 in the front-to-back direction and / or the left-to-right direction. Thus, by installing a displacement sensor on the bracket 10 in this embodiment and feeding back the position signal to the control unit 400, closed-loop control is achieved, improving positioning accuracy and automation.

[0068] In some embodiments, the displacement sensor is a grating ruler; or, the displacement sensor may also be an encoder.

[0069] In some embodiments, both the second driver and the third driver include a ball screw nut pair and a rotary motor, with the rotary motor driving the ball screw to rotate.

[0070] In some embodiments, the support platform 100 is provided with an air extraction chamber, which has an air outlet connected to the outside. An air inlet is provided on the outer surface of the sample placement part 110, and the air inlet communicates with the air extraction chamber. A fan is provided in the air extraction chamber, configured to create an airflow from the air inlet to the air outlet. That is, after the sample is placed in the sample placement part 110, the fan creates a negative pressure at the air inlet, thereby adsorbing the sample and preventing it from moving.

[0071] The colorimetric device according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0072] like Figure 4 As shown, the color measuring device of this embodiment includes a colorimeter and a bracket 10. The colorimeter has a probe, the bracket 10 is the bracket 10 of any of the above embodiments, and the probe 20 is mounted on the mounting structure.

[0073] In this embodiment of the colorimetric device, the mounting bracket 200 of the support 10 is mounted on the support platform 100. The mounting bracket 200 has a first driving unit 210 for driving its mounting structure to move along a first direction. The support 10 in this embodiment also includes a detection unit 300 and a control unit 400. The detection unit 300 detects the pressure on the colorimeter probe 20. The control unit 400 controls the first driving unit 210 based on the pressure data detected by the detection unit 300. When the pressure of the colorimeter probe 20 in contact with the sample is high, the control unit 400 can control the first driving unit 210 to perform corresponding actions (e.g., stopping the probe or moving the probe away from the sample). Therefore, the support 10 in this embodiment can prevent the colorimeter probe 20 from applying excessive pressure to the sample, preventing deformation of the sample and improving the accuracy of the colorimetric data.

[0074] The control method of the colorimetric device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0075] like Figure 6 As shown, the control method for the colorimetric device of this invention, applied to the colorimetric device in the above embodiments, includes the following steps:

[0076] The displacement data of the colorimeter probe 20 in the vertical direction is obtained based on the thickness of the sample to be tested.

[0077] Based on displacement data, the colorimeter probe 20 is controlled to approach the sample placement part 110 in the first direction.

[0078] Acquire the pressure data of the colorimeter probe 20 and determine whether the pressure data is greater than or equal to the preset pressure value.

[0079] If so, the colorimeter probe 20 is controlled to stop moving or move a preset distance away from the sample placement part 110.

[0080] In other words, when measuring the color of the sample to be tested, the thickness of the sample is obtained to determine the downward displacement of the colorimeter probe 20 based on the sample. The first drive unit 210 then automatically drives the colorimeter probe 20 to move closer to the sample. When the colorimeter probe 20 contacts the sample, it experiences pressure from the sample. The detection unit 300 monitors this pressure in real time. Based on the pressure data detected by the detection unit 300, the control unit 400 controls the colorimeter probe 20 to stop moving or move away from the sample placement area 110 when the detected pressure value is greater than or equal to a preset pressure value. This prevents the sample from being deformed by pressure and improves the accuracy of the colorimeter data.

[0081] The colorimetric device, its support, and control method provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A stand for a colorimeter, characterized in that, include: A support platform, wherein the support platform has a sample placement section; The mounting bracket is disposed on the support platform and is capable of moving closer to or further away from the sample placement area in a first direction; the mounting bracket has a mounting structure for mounting a colorimeter probe. A first drive unit is disposed on the mounting bracket; the first drive unit is configured to drive the mounting structure to move along the first direction. A detection unit is disposed on the mounting bracket; the detection unit is configured to detect the pressure exerted on the colorimeter probe and / or the sample to be tested. A control unit is electrically connected to the detection unit; the control unit is configured to control the operating state of the first drive unit based on the pressure applied to the colorimeter.

2. The holder for a colorimeter according to claim 1, characterized in that, The mounting bracket includes a frame, which is disposed on one side of the sample placement section in the first direction; The first drive unit is a telescopic rod, which is configured to be adjustable in size in the first direction; The first drive unit is connected between the frame and the mounting structure; The detection unit is a pressure sensor, and the detection unit is disposed on the mounting structure and / or between the telescopic rod and the frame.

3. The stand for a colorimeter according to claim 1, characterized in that, The mounting bracket is movable in a second direction and is also movable upward in a third direction; wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to both the first and second directions.

4. The holder for a colorimeter according to claim 3, characterized in that, Also includes: A first guide rail is disposed on the support platform; the first guide rail extends in the second direction. The second guide rail is connected to the first guide rail and is movable relative to the first guide rail in the second direction; the second guide rail extends upward in the third direction; the mounting bracket is connected to the second guide rail and is movable relative to the second guide rail in the third direction.

5. The holder for a colorimeter according to claim 4, characterized in that, There are two second guide rails, which are arranged opposite each other in the second direction, and the mounting bracket is connected between the two second guide rails; There are two first guide rails, which are arranged opposite each other in the third direction, and the sample placement part is located between the two first guide rails; each second guide rail includes a first end and a second end opposite each other in the second direction, the first end being movable in the second direction to engage with one of the first guide rails, and the second end being movable in the second direction to engage with the other first guide rail; A first locking element is provided between each of the first ends and the corresponding first guide rail, the first locking element being used to restrict the movement of the first end in the second direction; a second locking element is provided between each of the second ends and the corresponding first guide rail, the second locking element being used to restrict the movement of the second end in the second direction; and / or, A third locking element is provided between the mounting bracket and the second guide rail, the third locking element being used to restrict the movement of the mounting bracket in the third direction.

6. The holder for a colorimeter according to claim 4, characterized in that, There are multiple first guide rails, and the multiple first guide rails are spaced apart in the first direction; Each of the first guide rails is open at least one end in the second direction to allow the portion of the second guide rail connected to the first guide rail to disengage.

7. The stand for a colorimeter according to any one of claims 4-6, characterized in that, Also includes: A second driver is disposed on the support platform; The second driver is configured to drive the mounting bracket to move along the second direction; A third actuator, wherein the third actuator is disposed on the support platform; The third driver is configured to drive the mounting bracket to move along the third direction; A displacement sensor configured to measure the displacement of the mounting bracket in the second direction and / or in the second direction.

8. The holder for a colorimeter according to claim 1, characterized in that, The support platform is provided with an air extraction chamber, and the air extraction chamber has an air outlet that is connected to the outside; the outer surface of the sample placement part is provided with an air inlet, which is connected to the air extraction chamber. A fan is provided in the air extraction chamber, and the fan is configured to promote the formation of an airflow from the air inlet to the air outlet.

9. A colorimetric device, characterized in that, include: A colorimeter, wherein the colorimeter has a probe; The bracket is the bracket according to any one of claims 1-8, and the probe is mounted on the mounting structure.

10. A control method for a colorimetric device, characterized in that, The colorimetric device described in claim 9 includes: The displacement data of the colorimeter probe in the first direction is obtained based on the thickness of the sample to be tested; Based on the displacement data, the colorimeter probe is controlled to move closer to the sample placement area in the first direction; Acquire the pressure data of the colorimeter probe and determine whether the pressure data is greater than or equal to a preset pressure value; If so, the colorimeter probe is controlled to stop moving or move a preset distance away from the sample placement area.

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