Flatness measuring instrument and flatness measuring method

Abstract

The invention provides a flatness measuring instrument and a flatness measuring method. The flatness measuring instrument comprises an installation body, a distance detection piece and a control host. Wherein the mounting body is provided with at least one mounting hole, and is provided with a reference part attached to a to-be-detected surface. The number of the distance detection piece is at least one. The distance detection members are respectively installed in the installation holes, and are used for detecting the distance values between the distance detection members and the to-be-detected surface. And the control host is in communication connection with each distance detection piece. According to the invention, the distance value between the distance detection piece and the to-be-detected surface is detected through the distance detection piece installed on the installation body, and then the plurality of detected distance values obtained through detection are analyzed and calculated to obtain the flatness of the to-be-detected surface, so that the degree of dependence of flatness measurement work on the experience of workers is reduced, and the flatness measurement efficiency is improved. The risk that the to-be-detected surface is scratched by the feeler gauge in the flatness measurement process is eliminated, and the flatness measurement efficiency and accuracy are improved.

Description

Technical Field

[0001] This invention relates to the field of flatness measurement technology, and in particular to a flatness measuring instrument and a flatness measurement method. Background Technology

[0002] The existing method for measuring the flatness of flanges involves placing a knife-edge straightedge perpendicularly against the flange's sealing surface, inserting a feeler gauge between the sealing surface and the straightedge, and determining the flatness error based on the thickness of the feeler gauge (i.e., the feeler gauge thickness represents the flange flatness). For example, if a thicker feeler gauge can be easily inserted, the flatness error is large; if only a very thin feeler gauge can be inserted, or it cannot be inserted at all, the flatness is good. However, this method suffers from low measurement efficiency, large errors, and the potential to scratch the flange's sealing surface. Summary of the Invention

[0003] Therefore, it is necessary to provide a flatness measuring instrument and a flatness measuring method to address the problems of low measurement efficiency, large errors, and easy scratching of the flange sealing surface in existing flange flatness measurement methods.

[0004] The technical solution is as follows:

[0005] On the one hand, a flatness measuring instrument is provided, including:

[0006] The mounting body has at least one mounting hole and a reference part that fits against the surface to be tested;

[0007] The distance detection element is at least one, and each distance detection element is installed in a mounting hole and is used to detect the distance value between the distance detection element and the surface to be detected.

[0008] The control host is communicatively connected to each of the distance detection devices. The control host is used to calculate the flatness of the surface to be detected based on the distance values ​​detected by the multiple distance detection devices.

[0009] The technical solution will be further explained below:

[0010] In one embodiment, each of the mounting holes has a detection end, the end face of each detection end is located in the same plane parallel to the reference portion, and each distance detection element is flush with the end face of each detection end.

[0011] In one embodiment, the mounting holes have openings, and the control unit is mounted on the side of the mounting body near the openings to close each of the openings.

[0012] In one embodiment, the mounting body has at least one first connecting part on the side near the opening, and the control host has at least one second connecting part. Each second connecting part is correspondingly provided with each first connecting part and is detachably connected.

[0013] In one embodiment, the first connecting part is configured as a slot, and the second connecting part is configured as a clip that engages with the slot, wherein the outer contour shape of the clip is adapted to the inner contour shape of the slot.

[0014] In one embodiment, the width of the slot opening is less than the width of the bottom wall of the slot, and one end of the slot extends to the end face of one end of the mounting body, and / or the other end of the slot extends to the end face of the other end of the mounting body.

[0015] In one embodiment, there are two card slots, which are spaced apart, and each of the mounting holes is located between the two card slots.

[0016] In one embodiment, the mounting hole is stepped, with the two ends of the mounting hole respectively configured as a detection end and an opening, and the inner diameter of the opening being larger than the inner diameter of the detection end.

[0017] In one embodiment, the bottoms of the two opposite sidewalls of the mounting body are inclined toward each other and intersect to form the reference portion.

[0018] In one embodiment, the mounting holes are spaced apart along the extension direction of the reference portion, and the central axis of each mounting hole is perpendicular to the reference portion.

[0019] On the other hand, a flatness measurement method is provided, applied to the aforementioned flatness measuring instrument, the flatness measurement method comprising:

[0020] The reference part of the mounting body is placed tightly against the surface to be tested, and the position of the mounting body relative to the surface to be tested is adjusted so that the distance measuring element measures the distance value between the distance measuring element and different positions on the surface to be tested;

[0021] The flatness of the surface to be inspected is calculated based on the distance values ​​detected by the multiple distance detection devices.

[0022] Compared with existing flatness measurement methods, the flatness measuring instrument and method in this application have at least the following advantages: By installing distance detection components in a distributed layout with multiple measuring points on the mounting body, the various distance detection components cooperate to detect the surface to be inspected, and feed back the distance values ​​detected by multiple measuring points to the control host. The control host then analyzes and calculates the multiple distance values ​​received to obtain the flatness of the surface to be inspected. The inspection process does not require any experience from the operator, overcoming the dependence on operator experience in existing flatness measurement work. At the same time, it also eliminates the need for the feeler gauge, fundamentally eliminating the risk of scratching the surface to be inspected due to improper operation of the feeler gauge, improving the efficiency of flatness detection, realizing automatic detection of the flatness of the surface to be inspected, reducing the degree of operator involvement, correspondingly reducing errors caused by operators, and improving the accuracy of flatness measuring instrument detection. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a flatness measuring instrument according to one embodiment.

[0026] Figure 2 for Figure 1 Side view of the mounting body.

[0027] Figure 3 for Figure 1 A schematic diagram of the control host in the system.

[0028] Figure 4 for Figure 1 The front view of the installation body.

[0029] Figure 5 for Figure 1 Top view of the mounting body.

[0030] Figure 6 This is a flowchart of a flatness measurement method according to one embodiment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Flatness measuring instrument; 100. Mounting body; 110. Mounting hole; 111. Detection end; 112. Opening; 120. First connecting part; 121. Slot; 130. Reference part; 200. Distance detection component; 300. Control host; 310. Second connecting part; 311. Locking strip; 320. Display; 330. Alarm; 340. Indicator light; 350. Keyboard; 400. Signal line. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] Regarding existing methods for measuring the flatness of flanges, the inventors, through research and analysis, discovered the following problems: 1. It requires selecting a suitable feeler gauge based on the gap between the flange and the straightedge, necessitating trials with feeler gauges of different thicknesses. This method is highly dependent on the operator's experience, resulting in low measurement efficiency. 2. Based on the working principle of feeler gauges, they are limit gauges. Different people perceive different resistance when inserting the feeler gauge into the gap, leading to varying measurement results and significant errors. 3. Since feeler gauges are thin metal sheets, improper operation during insertion can easily scratch the flange sealing surface.

[0035] Based on this, the following embodiments of the flatness measuring instrument 10 and flatness measuring method of this application are proposed to solve the above-mentioned technical problems.

[0036] like Figure 1 and Figure 2 As shown, in one embodiment, a flatness measuring instrument 10 is provided, including a mounting body 100, a distance sensing element 200, and a control host 300. The mounting body 100 has at least one mounting hole 110 and a reference portion 130 that conforms to the surface to be measured. The number of distance sensing elements 200 is at least one. Each distance sensing element 200 is respectively mounted in a respective mounting hole 110 and is used to detect the distance value between the distance sensing element 200 and the surface to be measured (e.g., ...). Figure 1 (As shown in H). The control host 300 is communicatively connected to each distance detection element 200. The control host 300 is used to calculate the flatness of the surface to be inspected based on the distance values ​​detected by the multiple distance detection elements 200.

[0037] In the above embodiment, when using the flatness measuring instrument 10, the reference part 130 of the mounting body 100 is attached to the surface to be tested and the position of the mounting body 100 relative to the surface to be tested is adjusted so that the distance detection element 200 detects the distance values ​​between different positions on the surface to be tested and the distance detection element 200, and obtains multiple detection distance values. The multiple detection distance values ​​are fed back to the control host 300, and the control host 300 calculates the flatness of the surface to be tested based on the multiple detection distance values. This application involves installing distance measuring elements 200 in a distributed layout with multiple measuring points on the mounting body 100. Each distance measuring element 200 works together to measure the surface to be inspected, and the distance values ​​detected by the multiple measuring points are fed back to the control host 300. The control host 300 then analyzes and calculates the multiple distance values ​​to obtain the flatness of the surface to be inspected. The inspection process requires no experience from the operator, overcoming the dependence on operator experience in existing flatness measurement work. It also eliminates the need for a feeler gauge, fundamentally eliminating the risk of scratching the surface to be inspected due to improper feeler gauge operation, improving the efficiency of flatness inspection, and achieving automatic flatness inspection. The level of operator involvement is reduced, and errors caused by operators are correspondingly reduced, improving the accuracy of the flatness measuring instrument 10.

[0038] The number and distribution of the mounting holes 110 and the number and distribution of the distance sensing elements 200 can be flexibly adjusted according to actual usage needs. For example, the number of mounting holes 110 can be set to four, six, eight, or twelve, etc. All mounting holes 110 can be distributed in a linear array, a circular array, or a rectangular array, etc. The number of distance sensing elements 200 is equal to the number of mounting holes 110. The distance sensing elements 200 can be directly installed in the mounting holes 110, or they can be installed in the mounting holes 110 with the help of intermediate elements (such as mounting sleeves).

[0039] The reference part 130 can be configured as a reference surface, reference edge, or other structure that can fit into the surface to be inspected. The reference part 130 serves as a reference plane for inspection, providing a stable coordinate origin or reference line for distance value detection. All measurements are calculated based on this surface, ensuring data consistency and comparability. Furthermore, by fixing the reference part 130, errors caused by object (e.g., flange) placement, environmental changes, or irregular object shapes can be eliminated, ensuring the accuracy of the inspection.

[0040] It should be noted that when the number of distance detection elements 200 on the mounting body 100 is large and their distribution is relatively uniform, allowing for the detection of a sufficient number of distance values ​​at once, the position of the mounting body 100 relative to the surface to be inspected need not be adjusted during the measurement process. In other words, when the number of distance detection elements 200 on the mounting body 100 is small and / or their distribution is relatively concentrated, the position of the mounting body 100 relative to the surface to be inspected needs to be adjusted during the measurement process to ensure at least two measurements are taken, thereby guaranteeing the detection of a sufficient number of distance values ​​and improving the accuracy of the flatness measurement.

[0041] Specifically in this embodiment, when multiple detection distance values ​​are fed back to the control host 300, the control host 300 first compares and analyzes all the detection distance values ​​to eliminate noise values ​​in all the detection distance values, and then calculates the difference between the maximum and minimum values ​​in the remaining detection distance values ​​to obtain the flatness of the surface to be detected.

[0042] It should be noted that removing noise values ​​from all detection distance values ​​means deleting all detection distance values ​​that are greater than the preset value. The preset value can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, when the surface to be detected is the sealing surface of a flange, the preset value is set to 6.5mm (referencing the step height of the sealing surface of the DN1200 flange in GB / T9113-2010) to remove the detection distance values ​​collected by the distance detection element 200 located at the pipe opening of the flange.

[0043] like Figure 3 As shown, optionally, the control host 300 is equipped with a display 320 (e.g., a screen), an alarm 330 (e.g., a buzzer or alarm light), indicator lights 340, and a keypad 350 (including but not limited to numeric keys, measurement keys, and confirmation keys). The control host 300 pre-inputs a standard value for the flatness of the surface to be inspected. After the controller calculates the flatness of the surface to be inspected, it compares the calculated flatness value with the standard value. If the calculated flatness value is less than or equal to the standard value, the control host 300 controls the display to show "qualified"; if the calculated flatness value is greater than the standard value, the control host 300 controls the display to show "unqualified" and simultaneously controls the alarm to emit an alarm signal to alert the personnel.

[0044] It should be noted that the value of the standard can be flexibly adjusted according to the actual needs of use.

[0045] like Figure 1As shown, optionally, each mounting hole 110 has a detection end 111. The end face of each detection end 111 lies in the same plane parallel to the reference portion 130. Each distance detection element 200 is flush with the end face of each detection end 111. In this way, the end face of the detection end 111 can serve as a reference, and each distance detection element 200 measures the distance between the end face of the detection end 111 and different positions on the surface to be tested, thereby improving the accuracy of the flatness measuring instrument 10.

[0046] The distance detection element 200 can be configured as a laser rangefinder, a distance sensor, or other device capable of detecting distance. Specifically, in this embodiment, the distance detection element 200 is configured as a laser rangefinder (with a detection accuracy of 0.01 mm). The emitting end of the laser rangefinder is flush with the end face of the detection end 111.

[0047] like Figure 1 and Figure 2 As shown, in one embodiment, the mounting hole 110 has an opening 112. The control host 300 is mounted on the side of the mounting body 100 near the opening 112 to close each opening 112. In this way, the control host 300 can shield each distance detection element 200 to protect each distance detection element 200 and improve the reliability of the flatness measuring instrument 10.

[0048] Specifically, in this embodiment, each opening 112 is located on the side of the mounting body 100 away from the reference portion 130. Thus, each opening 112 is located on the same side of the mounting body 100, which facilitates the machining of mounting holes 110 on the mounting body 100 and the installation or removal of the distance detection element 200 on the mounting body 100.

[0049] like Figure 1 and Figure 2 As shown, the mounting body 100 further includes at least one first connecting portion 120 on the side near the opening 112. The control host 300 includes at least one second connecting portion 310. Each second connecting portion 310 is correspondingly provided with and detachably connected to each first connecting portion 120. Thus, the mounting body 100 and the control host 300 are detachable to facilitate subsequent maintenance and replacement of the flatness measuring instrument 10.

[0050] The first connecting part 120 can be detachably connected to the second connecting part 310 by snap-fit, plug-in, screw-in or other means.

[0051] like Figure 1 , Figure 2 and Figure 4As shown, optionally, the first connecting part 120 is configured as a slot 121. The second connecting part 310 is configured as a locking strip 311 that engages with the slot 121, the outer contour shape of the locking strip 311 matching the inner contour shape of the slot 121. In this way, the control host 300 can be directly inserted into the mounting body 100 via the locking strip 311 and the slot 121, improving the ease of assembly of the flatness measuring instrument 10.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, optionally, the width of the slot opening of the slot 121 is smaller than the width of the bottom wall of the slot 121. One end of the slot 121 extends to the end face of one end of the mounting body 100, and / or, the other end of the slot 121 extends to the end face of the other end of the mounting body 100. Thus, when the locking strip 311 on the control host 300 is slidably inserted into the slot 121 from one end of the mounting body 100, the locking strip 311 and the inner sidewall of the slot 121 are limited and engaged along the depth direction of the slot 121, ensuring that the control host 300 will not fall off the mounting body 100 along the depth direction of the slot 121, thereby improving the reliability of the flatness measuring instrument 10.

[0053] The cross-sectional shape and number of the card slots 121 and the number of card strips 311 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, the cross-sectional shape of the card slots 121 is trapezoidal. The control host 300 includes a housing, which is integrally formed with each card strip 311. The housing is made of polyurethane. Thus, the control host 300 has good wear resistance, chemical corrosion resistance, fatigue resistance, and high impact resistance.

[0054] like Figure 4 and Figure 5 As shown, optionally, there are two slots 121, which are spaced apart. Each mounting hole 110 is located between the two slots 121. In this way, the control host 300 can stably and reliably close the openings 112 of each mounting hole 110 to protect each distance detection element 200 and improve the reliability of the flatness measuring instrument 10.

[0055] Specifically, in this embodiment, both slots 121 extend along the length of the mounting body 100 and are located on both sides of the top wall of the mounting body 100. Both ends of the two slots 121 extend to the two end faces of the mounting body 100. The length of the retaining strip 311 is equal to the length of the slot 121.

[0056] like Figure 2As shown, in one embodiment, the mounting hole 110 is stepped. The two ends of the mounting hole 110 are respectively configured as a detection end 111 and an opening 112, with the inner diameter of the opening 112 being larger than the inner diameter of the detection end 111. Thus, when the distance sensing element 200 is installed on the detection end 111, the excess portion of the wire used to connect the distance sensing element 200 and the control host 300 can be hidden within the opening 112. This ensures that the wires will not interfere with the distance sensing element 200 or the control host 300 when the control host 300 is installed on the mounting body 100, and that the distance sensing element 200 remains connected to the control host 300 via the wires when the control host 300 is removed from the mounting body 100, improving the ease of assembly of the flatness measuring instrument 10. Furthermore, the larger inner diameter of the opening 112 facilitates heat dissipation for the distance sensing element 200, ensuring that the distance sensing element 200 can operate for extended periods, thus improving the practicality of the flatness measuring instrument 10. Meanwhile, the larger inner diameter of the opening 112 also helps to reduce the weight of the mounting body 100, thereby reducing the total weight of the flatness measuring instrument 10 and improving its portability.

[0057] Specifically, in this embodiment, the detection end 111 is the first segment of the mounting hole 110, the opening 112 is the second segment of the mounting hole 110, and the plane formed between the first segment and the second segment is a stepped surface.

[0058] The control host 300 can communicate with each distance detection element 200 via data cable, power cable, Bluetooth, wireless communication network technology or other means.

[0059] like Figure 1 As shown, optionally, the flatness measuring instrument 10 also includes signal lines 400. The number of signal lines 400 is the same as the number of distance detection elements 200. One end of each signal line 400 is electrically connected to each distance detection element 200, and the other end of each signal line 400 is electrically connected to the control host 300. When the control host 300 is mounted on the mounting body 100, any excess portions of each signal line 400 are correspondingly concealed within the mounting holes 110. This reduces the risk of the signal lines 400 becoming entangled and interfering with external objects, improving the reliability of the flatness measuring instrument 10.

[0060] Specifically, in this embodiment, the display 320 includes a main display screen and sub-display screens. The number of sub-display screens, the number of indicator lights 340, and the number of signal lines 400 are all the same as the number of distance detection elements 200. Each sub-display screen, each indicator light 340, and each signal line 400 is connected to each distance detection element 200 in a one-to-one correspondence. In this way, the working status of each corresponding distance detection element 200 can be observed and judged through each indicator light 340 and each sub-display screen, improving the practicality of the flatness measuring instrument 10.

[0061] like Figure 1 and Figure 2 As shown, in one embodiment, the bottoms of the two opposing sidewalls of the mounting body 100 are inclined toward each other and intersect to form a reference portion 130. Thus, the reference portion 130 is a knife-edge. During measurement, the mounting body 100 is perpendicularly close to the surface to be measured, so that the knife-edge is in close contact with the surface and makes line contact with it. This ensures that each distance measuring element 200 can accurately measure the distance between the distance measuring element 200 and the surface to be measured, improving the reliability of the flatness measuring instrument 10.

[0062] Specifically, in this embodiment, the mounting body 100 is configured as a knife-edge ruler. Thus, the knife-edge ruler offers at least the following advantages: 1. The blade design of the knife-edge ruler allows it to closely conform to the surface of the object to be inspected, reducing visual errors and ensuring high alignment accuracy. 2. Its physical contact characteristics can be directly used as a baseline to quickly determine the measurement starting point or direction, avoiding positioning deviations caused by ambient light or reflections in non-contact instruments (such as lasers), simplifying positioning operations. 3. The knife-edge ruler is made of tool steel or tungsten carbide, with a low coefficient of thermal expansion, maintaining shape stability during room temperature testing, reducing deformation errors, and is particularly suitable for factory field use. 4. Compared to electronic instruments, the knife-edge ruler requires no power supply or calibration, has low maintenance costs, and is suitable for rapid sampling inspections or field operations.

[0063] In this specific embodiment, the mounting body 100 is made of aluminum-magnesium alloy. This makes the flatness measuring instrument 10 lightweight, easy to use, and corrosion-resistant.

[0064] like Figure 2 and Figure 4 As shown, optionally, the mounting holes 110 are spaced apart along the extension direction of the reference portion 130, and the central axis of each mounting hole 110 is perpendicular to the reference portion 130. Thus, the mounting holes 110 are spaced apart along the extension direction of the reference portion 130 to ensure that the distance detection elements 200 are evenly distributed on the mounting body 100. After the distance detection elements 200 are installed in the mounting holes 110, they are coaxially positioned with the mounting holes 110 to ensure that each distance detection element 200 accurately detects the distance value between itself and the surface to be detected, thereby improving the accuracy of the flatness measuring instrument 10.

[0065] It should be noted that the bottom of the mounting body 100 is in the shape of a triangular prism. Each mounting hole 110 passes through the entire mounting body 100 and extends to the position of the reference part 130, so that the reference part 130 is divided into multiple segments arranged at intervals.

[0066] like Figure 6As shown, in one embodiment, a flatness measurement method is provided, applied to the flatness measuring instrument 10 in any of the above embodiments. The flatness measurement method includes at least the following steps:

[0067] S100: The reference part 130 of the mounting body 100 is placed tightly against the surface to be tested, and the position of the mounting body 100 relative to the surface to be tested is adjusted so that the distance measuring element 200 measures the distance values ​​between different positions on the surface to be tested and the distance measuring element 200.

[0068] S200: Calculate the flatness of the surface to be inspected based on the distance values ​​detected by multiple distance measuring devices 200.

[0069] Compared with existing flatness measurement methods, the flatness measurement method in this application has at least the following advantages: By installing distance detection elements 200 in a distributed layout with multiple measuring points on the mounting body 100, each distance detection element 200 cooperates to detect the surface to be tested, and feeds back the distance values ​​detected by multiple measuring points to the control host 300. The control host 300 then analyzes and calculates the multiple distance values ​​obtained to obtain the flatness of the surface to be tested. The detection process does not require the experience of the operator, overcoming the dependence on the experience of the operator in existing flatness measurement work. At the same time, it also eliminates the need for the feeler gauge, fundamentally eliminating the risk of scratching the surface to be tested due to improper operation of the feeler gauge, improving the detection efficiency of the flatness of the surface to be tested, realizing automatic detection of the flatness of the surface to be tested, reducing the degree of operator involvement, correspondingly reducing the error caused by the operator, and improving the accuracy of the flatness measuring instrument 10.

[0070] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0071] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0073] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0075] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flatness measuring instrument, characterized in that, include: The mounting body has at least one mounting hole and a reference part that fits against the surface to be tested; The distance detection element is at least one in number, and each of the distance detection elements is installed in the respective mounting hole and is used to detect the distance value between the distance detection element and the surface to be detected. The control host is communicatively connected to each of the distance detection devices. The control host is used to calculate the flatness of the surface to be detected based on the distance values ​​detected by the multiple distance detection devices.

2. The flatness measuring instrument according to claim 1, characterized in that, Each of the mounting holes has a detection end, the end face of each detection end is located in the same plane parallel to the reference part, and each distance detection element is flush with the end face of each detection end.

3. The flatness measuring instrument according to claim 1, characterized in that, The mounting holes have openings, and the control unit is mounted on the side of the mounting body near the openings to close each of the openings.

4. The flatness measuring instrument according to claim 3, characterized in that, The mounting body has at least one first connecting part on the side near the opening, and the control host has at least one second connecting part. Each second connecting part is correspondingly provided with each first connecting part and can be detachably connected.

5. The flatness measuring instrument according to claim 4, characterized in that, The first connecting part is configured as a slot, and the second connecting part is configured as a locking strip that engages with the slot, wherein the outer contour shape of the locking strip is adapted to the inner contour shape of the slot.

6. The flatness measuring instrument according to claim 5, characterized in that, The width of the slot opening is less than the width of the bottom wall of the slot, and one end of the slot extends to the end face of one end of the mounting body, and / or the other end of the slot extends to the end face of the other end of the mounting body.

7. The flatness measuring instrument according to claim 5, characterized in that, The number of card slots is two, and the two card slots are spaced apart. Each of the mounting holes is located between the two card slots.

8. The flatness measuring instrument according to claim 3, characterized in that, The mounting hole is stepped, with the two ends of the mounting hole being a detection end and an opening, respectively, and the inner diameter of the opening being larger than the inner diameter of the detection end.

9. The flatness measuring instrument according to any one of claims 1 to 8, characterized in that, The bottoms of the two opposite sidewalls of the mounting body are inclined toward each other and intersect to form the reference portion.

10. The flatness measuring instrument according to claim 9, characterized in that, Each of the mounting holes is spaced apart along the extension direction of the reference portion, and the central axis of each of the mounting holes is perpendicular to the reference portion.

11. A method for measuring flatness, characterized in that, The flatness measurement method, applied to the flatness measuring instrument as described in any one of claims 1 to 10, comprises: The reference part of the mounting body is placed tightly against the surface to be tested, and the position of the mounting body relative to the surface to be tested is adjusted so that the distance measuring element measures the distance value between the distance measuring element and different positions on the surface to be tested; The flatness of the surface to be inspected is calculated based on the distance values ​​detected by the multiple distance detection devices.

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