Measuring tool correction device and measuring tool correction method

Abstract

The invention relates to the technical field of measuring tool calibration, in particular to a measuring tool correction device and a measuring tool correction method. The measuring tool correction device comprises a correction mechanism, the correction mechanism is provided with a correction groove, an arc-shaped groove and two positioning grooves, a measuring tool body can be accommodated in the correction groove, a measuring contact is inserted in the arc-shaped groove, a protective bridge contact is inserted in the corresponding positioning groove, and the circle center of the arc-shaped groove is located on a perpendicular bisector of a connecting line of the two positioning grooves. Static clamping of the inner diameter measuring tool is achieved by inserting the protective bridge contacts into the corresponding positioning grooves and inserting the measuring contacts into the arc grooves, the center of the arc grooves is located on the perpendicular bisector of the connecting line of the two positioning grooves, and it is guaranteed that the central axis of the measuring contacts is perpendicular to the measuring face of the measuring tool calibration device. Therefore, the device is kept at a correct measurement position and is stable and reliable. According to the measuring tool correction method, static clamping of the inner diameter measuring tool is achieved by using the measuring tool correction device, correction reliability is guaranteed, and correction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring tool calibration, and in particular to a measuring tool calibration device and a measuring tool calibration method. Background Art

[0002] During the use of the internal diameter gauge, errors may gradually occur, affecting the measurement accuracy. Therefore, it is necessary to calibrate the internal diameter gauge regularly to correct these errors and ensure the accuracy of the internal diameter gauge measurement results.

[0003] The inner diameter gauge is mainly used to measure the internal dimensions of the object to be measured. The inner diameter gauge includes a gauge body and a measuring contact. Since the measuring contact is spherical, during calibration, the inner diameter gauge and the calibration device are in point contact. This results in the inability to maintain a reliable calibration position between the inner diameter gauge and the calibration device. The calibration process cannot be static, that is, it is a dynamic calibration, and the reliability of the calibration is poor.

[0004] Therefore, there is an urgent need for a measuring tool calibration device and a measuring tool calibration method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a measuring tool calibration device and a measuring tool calibration method, so as to reduce the difficulty of using an inner diameter measuring tool and reduce the difficulty of calibration.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A measuring tool calibration device is used to calibrate an inner diameter measuring tool, wherein the inner diameter measuring tool comprises a measuring tool body, a bridge protection contact and a measuring contact, wherein the bridge protection contact and the measuring contact are respectively located at two ends of the axial direction of the measuring tool body, and the number of the bridge protection contacts is two, and the two bridge protection contacts are arranged along the radial direction of the measuring tool body, and the measuring tool calibration device comprises:

[0008] The correction mechanism comprises a correction groove, an arc groove and two positioning grooves, the measuring tool body can be accommodated in the correction groove, the measuring contact is plugged into the arc groove, the bridge contact is plugged into the corresponding positioning groove, and the center of the arc groove is located on the perpendicular bisector of the line connecting the two positioning grooves.

[0009] As an optional solution, the positioning groove is V-shaped.

[0010] As an optional solution, the measuring tool body further includes a moving contact, and the correction mechanism is further provided with a receiving groove, and the moving contact is received in the receiving groove.

[0011] As an optional solution, a length mark is provided on the correction mechanism, and the length mark is used to mark the length value of the correction groove.

[0012] As an optional solution, the inner diameter measuring tool further includes an extension rod, and the extension rod is located on a side of the measuring tool body away from the bridge protection contact, and the measuring tool calibration device further includes:

[0013] a fixing mechanism, the fixing mechanism being configured to fix the extension rod;

[0014] A vision mechanism is configured to read the length of the extension rod.

[0015] As an optional solution, a fixing groove is provided on the fixing mechanism, and the extension rod is plugged into and matched with the fixing groove.

[0016] As an optional solution, the measuring tool calibration device further includes:

[0017] A control mechanism is communicatively connected with the correction mechanism and the inner diameter measuring tool respectively.

[0018] The measuring tool calibration method is performed using the above-mentioned measuring tool calibration device, and comprises the following steps:

[0019] S1, determine whether the inner diameter measuring tool uses a measuring contact, if yes, execute step S2, if no, execute step S3;

[0020] S2, calibrating the length between the measuring contact and the moving contact;

[0021] S3, determining whether the inner diameter measuring tool uses an extension rod, if so, executing step S4, if not, executing step S6;

[0022] S4, calibrate the length of the measuring tool body;

[0023] S5, calibrating the length of the extension rod;

[0024] S6. Calibrate the length of the measuring tool body.

[0025] As an optional solution, step S2 includes:

[0026] S21, placing the measuring contact into the arc groove;

[0027] S22, placing the bridge protection contact into the corresponding positioning groove, at which time the sphere center of the measuring contact is located on the perpendicular bisector of the line connecting the two bridge protection contacts;

[0028] S23, judging whether the reading of the inner diameter measuring tool is consistent with the value of L, if so, there is no need to calibrate the reading of the inner diameter measuring tool, if not, adjusting the reading of the inner diameter measuring tool to the standard length.

[0029] As an optional solution, step S4 includes:

[0030] S41, placing the measuring tool body in the calibration groove;

[0031] S42, determining whether the reading of the measuring tool body is consistent with the length of the calibration groove, if so, there is no need to calibrate the reading of the measuring tool body, if not, adjusting the reading of the measuring tool body to be consistent with the length of the calibration groove.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The measuring tool calibration device provided by the present invention comprises a calibration mechanism, which has a calibration groove, an arc groove and two positioning grooves, the measuring tool body can be accommodated in the calibration groove, the measuring contact is plugged into the arc groove, the bridge contact is plugged into the corresponding positioning groove, and the center of the arc groove is located on the perpendicular bisector of the line connecting the two positioning grooves. By plugging the bridge contact into the corresponding positioning groove and the measuring contact into the arc groove, static clamping of the inner diameter measuring tool is achieved, and by the center of the arc groove being located on the perpendicular bisector of the line connecting the two positioning grooves, the verticality of the central axis of the measuring contact and the measuring surface of the measuring tool calibration device is ensured, so as to maintain the correct measuring position, which is stable and reliable.

[0034] The measuring tool calibration method provided by the present invention is completed using the measuring tool calibration device, thereby realizing static clamping of the inner diameter measuring tool, ensuring the reliability of calibration, reducing the calibration difficulty, simplifying the calibration process, and improving the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of the structure of an inner diameter measuring tool provided in Embodiment 1 of the present invention;

[0037] Figure 2 A cross-sectional view of an inner diameter measuring tool provided in Embodiment 1 of the present invention;

[0038] Figure 3 A schematic diagram of the structure of a measuring tool calibration device and an inner diameter measuring tool provided in the first embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the structure of a measuring tool calibration mechanism and a measuring tool body provided in the first embodiment of the present invention;

[0040] Figure 5A schematic structural diagram of a measuring tool correction mechanism provided by the first embodiment of the present invention from a first viewing angle;

[0041] Figure 6 A schematic structural diagram of a measuring tool correction mechanism from a second viewing angle provided in the second embodiment of the present invention;

[0042] Figure 7 This is a flow chart of a measuring tool calibration method provided in Embodiment 3 of the present invention.

[0043] Reference numerals:

[0044] 100. Gauge calibration device;

[0045] 10. Correction mechanism; 11. Correction groove; 12. Circular arc groove; 13. Positioning groove; 14. Accommodation groove;

[0046] 20. fixing mechanism; 21. fixing slot;

[0047] 30. Visual organization;

[0048] 40. Support mechanism;

[0049] 200, inner diameter measuring tool; 210, measuring contact; 220, measuring tool body; 2201, scale bar; 2202, main body; 2203, rod holder; 2204, locking screw; 2205, reading head; 2206, moving contact; 230, bridge protection contact; 240, display screen. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0051] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the terms "plurality" or "multiple" appear, the meaning is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In this application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0056] Embodiment 1

[0057] Internal diameter measuring tools are mainly used to measure the internal dimensions of the object to be measured, especially the inner diameter of circular workpieces, such as hole diameter, cylinder inner diameter, etc.

[0058] like Figure 1 and Figure 2As shown, the inner diameter gauge 200 includes a gauge body 220, and the gauge body 220 can measure the length of the object to be measured. In addition, the inner diameter gauge 200 can also be equipped with at least one extension rod, which can be detachably connected to the gauge body 220 to increase the measuring range of the inner diameter gauge 200; the inner diameter gauge 200 can also be equipped with a measuring contact 210 to measure the inner diameter of the object to be measured.

[0059] like Figure 1 and Figure 2 As shown, the inner diameter gauge 200 also includes a display screen 240 and two bridge contacts 230. The display screen 240 is arranged on the gauge body 220. The bridge contacts 230 and the measuring contacts 210 are respectively located at two ends of the axial direction of the gauge body 220. The two bridge contacts 230 are arranged along the radial direction of the gauge body 220. The contact points of the two bridge contacts 230 and the end points of the measuring contacts 210 form an isosceles triangle. The gauge body 220 includes a moving contact 2206, a main body 2202, and a connecting rod seat 220. 3. Locking screw 2204, scale bar 2201 and reading head 2205, measuring contact 210 and connecting rod seat 2203 are detachably connected, connecting rod seat 2203 and moving contact 2206 are movably arranged at two ends of the axial direction of main barrel 2202, locking screw 2204 is passed through main barrel 2202 and abuts against connecting rod seat 2203, scale bar 2201 and connecting rod seat 2203 are fixed, reading head 2205 is arranged on scale bar 2201 and connected with moving contact 2206. Both connecting rod seat 2203 and moving contact 2206 can move along the axial direction of main barrel 2202, and during the movement, reading head 2205 moves with connecting rod seat 2203 and moving contact 2206, and the display value on display screen 240 is the actual length between moving contact 2206 and measuring contact 210.

[0060] When measuring the aperture of the object to be measured, loosen the locking screw 2204, adjust the connecting rod seat 2203 to the appropriate position and then lock it. At this time, when the moving contact 2206 is not under pressure, the total length of the ruler body is greater than the aperture, and when the moving contact 2206 is pressed to be flush with the end cover of the main body 2202, the total length of the ruler body is less than the aperture; press the measuring contact 210 to the hole wall to be measured, and press the other end into the hole to ensure that the contact points of the two bridge contacts 230 are in stable contact with the hole wall. The indication on the display screen 240 will gradually decrease and then gradually increase. The minimum indication in this process is the aperture value of the measured hole.

[0061] It should be noted that the measuring contact 210 is of a rod type, and the rod type measuring contact is detachably connected to the rod seat 2203. Depending on the measuring range, the rod seat 2203 may also be equipped with an extension rod, and the measuring contact 210 may be detachably connected to the end of the extension rod away from the rod seat 2203.

[0062] The inner diameter measuring tool 200 may gradually generate errors during use, affecting the measurement accuracy. Therefore, the inner diameter measuring tool 200 needs to be calibrated regularly to correct these errors and ensure the accuracy of the measurement results of the inner diameter measuring tool 200.

[0063] Since the measuring contact 210 is spherical, during calibration, the inner diameter gauge 200 and the calibration device are in point contact, which makes it impossible to maintain a reliable calibration position between the inner diameter gauge 200 and the calibration device. The calibration process cannot be static, that is, dynamic calibration, and the reliability of calibration is poor.

[0064] In order to solve the above problems, Figure 3 - Figure 5 As shown, this embodiment provides a measuring tool calibration device 100, which is used to calibrate an inner diameter measuring tool 200. Specifically, the measuring tool calibration device 100 includes a calibration mechanism 10, the calibration mechanism 10 has a calibration groove 11, an arc groove 12 and two positioning grooves 13, the measuring tool body 220 can be accommodated in the calibration groove 11, the measuring contact 210 is plugged into the arc groove 12, the bridge contact 230 is plugged into the corresponding positioning groove 13, and the center of the arc groove 12 is located on the perpendicular bisector of the line connecting the two positioning grooves 13. By inserting the bridge protection contact 230 into the corresponding positioning groove 13 and the measuring contact 210 into the arc groove 12, static clamping of the inner diameter measuring tool 200 is achieved. The center of the arc groove 12 is located on the perpendicular bisector of the line connecting the two positioning grooves 13, which ensures that the central axis of the measuring contact 210 is perpendicular to the measuring surface of the measuring tool calibration device 100, thereby maintaining the correct measuring position stably and reliably to ensure the reliability of the calibration.

[0065] Optionally, the positioning groove 13 is V-shaped to ensure stable bearing and clamping of the bridge protection contact 230 .

[0066] Optionally, the correction mechanism 10 is further provided with a receiving groove 14, and the moving contact 2206 is received in the receiving groove 14. Figure 4 The length of L is the standard length of the measuring tool body 220 , wherein the length of L is the distance between the bottom of the arc groove 12 and the bottom of the receiving groove 14 .

[0067] Optionally, the arc groove 12 , the correction groove 11 , the positioning groove 13 and the receiving groove 14 are arranged and connected along the length direction of the measuring tool body 220 to simplify the structure of the correction mechanism 10 and facilitate the processing of the above-mentioned grooves.

[0068] Optionally, a length mark is provided on the correction mechanism 10, and the length mark is used to mark the length value of the correction groove 11 for manual correction and comparison.

[0069] It should be noted that the inner diameter gauge 200 in this article refers to a rod-shaped gauge that conforms to the Abbe principle and has a measuring contact 210 on the main axis of the gauge body 220. Other types of inner diameter gauges, such as three-jaw inner diameter gauges, are not included in this list.

[0070] Embodiment 2

[0071] This embodiment provides a measuring tool calibration device 100, the specific structure of which is basically the same as that of the measuring tool calibration device 100 provided in the first embodiment. The specific structure of the measuring tool calibration device 100 provided in this embodiment is different from that of the first embodiment in that the specific structure of the calibration mechanism 10 is different.

[0072] When the inner diameter measuring tool 200 does not need to use the measuring contact 210, in order to expand the measuring range of the inner diameter measuring tool 200, the inner diameter measuring tool 200 can also be equipped with an extension rod, and the extension rod and the extension rod seat 2203 can be detachably connected. Figure 6 As shown, the correction mechanism 10 may not be provided with the arc groove 12, the positioning groove 13 and the accommodating groove 14, and the measuring tool correction device 100 also includes a fixing mechanism 20 and a visual mechanism 30, the measuring tool body 220 is accommodated in the correction groove 11, the length of the correction groove 11 is the standard length of the measuring tool body 220, the fixing mechanism 20 is configured to fix the extension rod, and the visual mechanism 30 is configured to read the length dimension of the extension rod. By setting the correction groove 11 with the standard length of the measuring tool body 220, the correction of the measuring tool body 220 is realized, and there is no need to make a limit device of a standard integer length, and there is no need for cumbersome adjustment of the measuring tool end reading, which reduces the difficulty of correction; the extension rod is fixed by the fixing mechanism 20, and the visual mechanism 30 reads the length dimension of the extension rod, and there is no need to make an extension rod of a standard integer length. The actual length of the extension rod can be accumulated into the length reading of the measuring tool body 220 without manual calculation, which effectively eliminates or reduces the cumulative error value and reduces the difficulty of use.

[0073] Optionally, the measuring tool calibration device 100 further includes a control mechanism, which is respectively connected to the calibration mechanism 10 and the inner diameter measuring tool 200 in communication, and the control mechanism records the standard length of the measuring tool body 220. When the length of the calibration groove 11 measured by the measuring tool body 220 is inconsistent with the standard length, the control mechanism controls the measuring tool body 220 to perform automatic numerical correction. It can be understood that the control mechanism is a prior art, and any control mechanism that can achieve the above functions can be used in this embodiment.

[0074] Optionally, the calibration groove 11 is C-shaped, O-shaped or frame-shaped, and the measuring tool body 220 to be calibrated can be correctly placed on the calibration mechanism 10 .

[0075] Optionally, a fixing groove 21 is provided on the fixing mechanism 20, and the extension rod is plugged into and matched with the fixing groove 21 to achieve stable clamping of the fixing mechanism 20 on the extension rod.

[0076] Optionally, the measuring tool calibration device 100 further includes a supporting mechanism 40 , which is disposed on the fixing mechanism 20 , and the visual mechanism 30 is disposed on the supporting mechanism 40 , so that the supporting mechanism 40 realizes a stable bearing effect on the visual mechanism 30 .

[0077] Specifically, the visual mechanism 30 is an existing visual OCR / barcode scanning device, and an actual length numerical mark should be set at an appropriate position on the surface of the extension rod, either in digital form or in QR code form.

[0078] When the measuring tool uses an extension rod, this OCR / scanning device can read the actual length value of the extension rod and directly add this length value to the display reading of the measuring tool body 220 through the data exchange function, so that the display of the measuring tool body 220 directly displays the actual value of the measured inner diameter without conversion, reducing the difficulty of use.

[0079] It is understandable that the measuring tool calibration device 100 is used to calibrate the length reading of the inner diameter measuring tool 200, and can also be used to calibrate measuring tools for similar purposes, such as calibrating a connecting rod type inner diameter micrometer.

[0080] Embodiment 3

[0081] like Figure 5 As shown, this embodiment provides a measuring tool calibration method, which is completed using the measuring tool calibration device 100 provided in the first or second embodiment, and includes the following steps:

[0082] S1, determine whether the inner diameter measuring tool 200 uses the measuring contact 210, if yes, execute step S2, if no, execute step S3;

[0083] S2, calibrating the length between the measuring contact 210 and the moving contact 2206;

[0084] S3, determining whether the inner diameter measuring tool 200 uses an extension rod, if yes, executing step S4, if no, executing step S6;

[0085] S4, calibrating the length of the measuring tool body 220;

[0086] S5. Correct the length of the extension rod;

[0087] S6. Calibrate the length of the measuring tool body 220.

[0088] Through the above steps, the inner diameter measuring tool 200 can be calibrated using auxiliary tools, which reduces the difficulty of calibration, simplifies the calibration process, and improves the calibration efficiency.

[0089] Optionally, step S2 includes:

[0090] S21, placing the measuring contact 210 into the arc groove 12;

[0091] S22, placing the bridge protection contact 230 into the corresponding positioning groove 13, at which time the ball center of the measuring contact 210 is located on the perpendicular bisector of the line connecting the two bridge protection contacts 230;

[0092] S23, judging whether the reading of the inner diameter measuring tool 200 is consistent with the value of L, if so, there is no need to calibrate the reading of the inner diameter measuring tool 200, if not, adjusting the reading of the inner diameter measuring tool 200 to the standard length.

[0093] Through the above steps, the two bridge guard contacts and the measuring contact 210 form an isosceles triangle, ensuring that the central axis of the measuring contact 210 is perpendicular to the measuring surface of the measuring tool correction device 100, thereby maintaining the correct measuring position, so that the correct measuring position of the inner diameter measuring tool 200 can be maintained, that is, static calibration can be achieved, thereby ensuring the reliability of calibration.

[0094] Optionally, step S4 includes:

[0095] S41, placing the measuring tool body 220 in the calibration groove 11;

[0096] S42, determining whether the reading of the measuring tool body 220 is consistent with the length of the calibration groove 11, if so, there is no need to calibrate the reading of the measuring tool body 220, if not, adjusting the reading of the measuring tool body 220 to be consistent with the length of the calibration groove 11.

[0097] The measuring tool body 220 is calibrated by the calibration groove 11 with a standard length, and there is no need to make a limit device with a standard integer length, and there is no need for cumbersome adjustment of the measuring tool end reading, which reduces the difficulty of calibration.

[0098] It should be noted that the specific process of step S6 is the same as that of step S4. To ensure the brevity of the text, step S6 will not be described in detail here.

[0099] Optionally, step S5 includes:

[0100] S51, placing the extension rod into the fixing groove 21;

[0101] S52 , the visual mechanism 30 reads the length of the extension rod and accumulates it into the length reading of the measuring tool body 220 .

[0102] The extension rod is fixed by the fixing groove 21, and the visual mechanism 30 reads the length dimension of the extension rod. There is no need to make an extension rod of a standard integer length. The actual length of the extension rod can be accumulated into the length reading of the measuring tool body 220 without manual calculation, which effectively eliminates or reduces the cumulative error value and reduces the difficulty of use.

[0103] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0104] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A measuring tool calibration device, used for calibrating an inner diameter measuring tool (200), the inner diameter measuring tool (200) comprising a measuring tool body (220), a bridge contact (230) and a measuring contact (210), the bridge contact (230) and the measuring contact (210) being respectively located at two ends of the axial direction of the measuring tool body (220), the number of the bridge contacts (230) being two, and the two bridge contacts (230) being arranged along the radial direction of the measuring tool body (220), characterized in that: The measuring tool calibration device comprises: A correction mechanism (10), the correction mechanism (10) comprising a correction groove (11), a circular arc groove (12) and two positioning grooves (13), the measuring tool body (220) can be accommodated in the correction groove (11), the measuring contact (210) is plugged into the circular arc groove (12), the bridge protection contact (230) is plugged into the corresponding positioning groove (13), and the center of the circular arc groove (12) is located on the perpendicular bisector of the line connecting the two positioning grooves (13).

2. The measuring tool calibration device according to claim 1, characterized in that: The positioning groove (13) is V-shaped.

3. The measuring tool calibration device according to claim 1, characterized in that: The measuring tool body (220) also includes a moving contact (2206), and the correction mechanism (10) is also provided with a receiving groove (14), and the moving contact (2206) is received in the receiving groove (14).

4. The measuring tool calibration device according to claim 1, characterized in that: The correction mechanism (10) is provided with a length mark, and the length mark is used to mark the length value of the correction groove (11).

5. The measuring tool calibration device according to claim 1, characterized in that: The inner diameter measuring tool (200) further comprises an extension rod, wherein the extension rod is located on a side of the measuring tool body (220) away from the bridge protection contact (230), and the measuring tool calibration device further comprises: A fixing mechanism (20), wherein the fixing mechanism (20) is configured to fix the extension rod; A visual mechanism (30) is configured to read the length of the extension rod.

6. The measuring tool calibration device according to claim 5, characterized in that: The fixing mechanism (20) is provided with a fixing groove (21), and the extension rod is plugged into and matched with the fixing groove (21).

7. The measuring tool calibration device according to any one of claims 1 to 6, characterized in that: The measuring tool calibration device also includes: A control mechanism is communicatively connected to the correction mechanism (10) and the inner diameter measuring tool (200) respectively.

8. A measuring tool calibration method, characterized in that: The method is completed using the measuring tool calibration device as described in any one of claims 1 to 7, comprising the following steps: S1, determining whether the inner diameter measuring tool (200) uses a measuring contact (210), if so, executing step S2, if not, executing step S3; S2, calibrating the length between the measuring contact (210) and the moving contact (2206); S3, determining whether the inner diameter measuring tool (200) uses an extension rod, if yes, executing step S4, if no, executing step S6; S4, calibrating the length of the measuring tool body (220); S5, calibrating the length of the extension rod; S6. Calibrate the length of the measuring tool body (220).

9. The measuring tool calibration method according to claim 8, characterized in that: Step S2 includes: S21, placing the measuring contact (210) into the circular arc groove (12); S22, placing the bridge protection contact into the corresponding positioning groove (13), at which time the center of the measuring contact (210) is located on the perpendicular bisector of the line connecting the two bridge protection contacts; S23, determining whether the reading of the inner diameter measuring tool (200) is consistent with the value of L; if so, there is no need to calibrate the reading of the inner diameter measuring tool (200); if not, adjusting the reading of the inner diameter measuring tool (200) to the standard length.

10. The measuring tool calibration method according to claim 8, characterized in that: Step S4 includes: S41, placing the measuring tool body (220) in the calibration groove (11); S42, determining whether the reading of the measuring tool body (220) is consistent with the length of the calibration groove (11); if so, there is no need to calibrate the reading of the measuring tool body (220); if not, adjusting the reading of the measuring tool body (220) to be consistent with the length of the calibration groove (11).

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