Online displacement calibration device

Abstract

The invention relates to an online displacement calibration device. The online displacement calibration device comprises a first connecting assembly which comprises a base and a supporting frame, and the base is arranged to be matched and fixed with displacement detection equipment; the fixed protection assembly comprises a linear fixing piece and a linear guide rail, the linear guide rail is arranged at the bottom of the linear fixing piece, and a grating ruler is arranged on the bottom surface of the linear guide rail; each linear spring guide sleeve assembly comprises a guide sleeve and a straight rod, the guide sleeves are arranged on the supporting frame, the straight rods are arranged on the supporting frame in a penetrating mode and located in the guide sleeves, the bottoms of the straight rods are movably connected with the linear fixing pieces, and the tops of the straight rods are used for arranging the inductance micrometer gauges; and the second connecting assembly comprises a fixed seat and a sliding piece connected with the fixed seat, the fixed seat is fixed on an actuating rod of the displacement detection equipment, the sliding piece is in sliding fit with the linear guide rail, and a reading head is arranged on the fixed seat. According to the online displacement calibration device provided by the invention, on-site rapid calibration of displacement detection equipment is realized, and the calibration precision and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of displacement detection equipment calibration, and in particular to an online displacement calibration device. Background Art

[0002] In the automotive industry's testing and assembly systems, displacement sensors are key components for equipment control and are widely used in press-fitting equipment, fatigue testing equipment, and other applications. Traditional calibration methods require removing the displacement sensor from the equipment and sending it to a laboratory for calibration. This method cannot meet the online calibration requirements of equipment using servo motor closed-loop control systems. Existing calibration specifications (such as JJF1305-2011) are primarily targeted at laboratory environments and are difficult to guide on-site equipment calibration. This results in low calibration efficiency, large errors, and an inability to cover the calibration requirements of equipment with large travel ranges. Therefore, there is an urgent need for an online displacement calibration device that can be quickly installed on-site, exhibits high precision, and is compatible with multiple ranges. Summary of the Invention

[0003] In response to the above-mentioned problems in the prior art, the present invention provides an online displacement calibration device to solve the problems of low calibration efficiency, inability to operate online, and poor compatibility in the prior art, realize on-site rapid calibration of displacement detection equipment, improve calibration accuracy and efficiency, and reduce human errors.

[0004] Specifically, the present invention proposes an online displacement calibration device applicable to a displacement detection device, the online displacement calibration device comprising:

[0005] A first connecting assembly includes a base and a support frame, wherein the base is fixedly coupled with the displacement detection device, and the support frame is arranged on the base;

[0006] A fixed protection assembly includes a linear fixing member and a linear guide rail, wherein the linear guide rail is arranged at the bottom of the linear fixing member, and a grating ruler is provided on the bottom surface of the linear guide rail;

[0007] Two sets of linear spring guide sleeve assemblies, each set of the linear spring guide sleeve assemblies includes a guide sleeve and a straight rod, the guide sleeve is arranged on the support frame, the straight rod is passed through the support member and is located in the guide sleeve, the bottom of the straight rod is movably connected to the linear fixing member, and the top of the straight rod is used to set an inductive micrometer;

[0008] The second connecting component includes a fixed seat and a sliding member connected to the fixed seat. The fixed seat is fixed on the displacement component of the displacement detection device. The sliding member slides in cooperation with the linear guide rail. A reading head is provided on the fixed seat.

[0009] According to one embodiment of the present invention, the base includes a fixed plate and a movable plate, the support frame is fixed on the movable plate, and the movable plate can move in a vertical direction relative to the fixed plate to adjust the height of the support frame.

[0010] According to an embodiment of the present invention, the length direction of the support frame is parallel to the axial direction of the displacement component.

[0011] According to one embodiment of the present invention, the guide sleeve is used to lock or release the straight rod. When the guide sleeve is in a released state, the straight rod can move up and down relative to the guide sleeve. When the guide sleeve is in a locked state, the straight rod is fixed.

[0012] According to one embodiment of the present invention, the fixed protection assembly further includes a plurality of positioning members, which are arranged in the length direction of the linear guide rail, the height of the positioning members is adjustable, and the bottom of the positioning members is in contact with the surface of the displacement component.

[0013] According to one embodiment of the present invention, the positioning member includes a positioning body, a stretching guide rail and a locking nut. The stretching guide rail and the positioning body are slidingly matched, the top of the stretching guide rail is slidingly matched with the linear guide rail, and the locking nut is matched with the positioning body to fix the height position of the stretching guide rail.

[0014] According to one embodiment of the present invention, a groove is provided on the top of the stretching guide rail, and the groove matches the shape of the bottom of the linear guide rail.

[0015] According to one embodiment of the present invention, a tilt sensor is provided on the base.

[0016] According to one embodiment of the present invention, a laser displacement sensor is provided on the fixing seat.

[0017] According to one embodiment of the present invention, the online displacement calibration device also includes a controller and a display. The controller is electrically connected to the displacement detection device, the inductive micrometer, the inclination sensor and the laser displacement sensor. The controller is used to control the action of the displacement detection device. The controller receives the detection results of the inductive micrometer, the inclination sensor and the laser displacement sensor, determines whether the length direction of the grating scale and the axial direction of the displacement component are coaxial based on the detection results, and sends the detection results and / or judgment results to the display.

[0018] The present invention provides an online displacement calibration device, which can adapt to grating scales of different ranges through a first connecting component, a second connecting component, a fixed protection component and two sets of linear spring guide sleeve assemblies, realize rapid replacement and installation, and ensure accurate and reliable calibration results.

[0019] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application. The accompanying drawings illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

[0021] In the attached figure:

[0022] Figure 1 A schematic structural diagram of an online displacement calibration device according to an embodiment of the present invention is shown.

[0023] Figure 2 A diagram showing the usage status of an online displacement calibration device according to an embodiment of the present invention is shown.

[0024] Figure 3A A schematic structural diagram of a linear spring guide sleeve assembly according to an embodiment of the present invention is shown.

[0025] Figure 3B yes Figure 3A Top view of .

[0026] Figure 4 A schematic structural diagram of a positioning member according to an embodiment of the present invention is shown.

[0027] Figure 5 A schematic structural diagram of an online displacement calibration device according to another embodiment of the present invention is shown.

[0028] Figure 6 A schematic structural diagram of an online displacement calibration device according to another embodiment of the present invention is shown.

[0029] Figure 7A A front view of a fine-tuning device according to another embodiment of the present invention is shown.

[0030] Figure 7B A left side view of a fine adjustment device according to another embodiment of the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] Online displacement calibration device 100

[0033] First connecting component 102

[0034] Fixed protection component 103

[0035] Linear spring guide assembly 104

[0036] Second connection component 105

[0037] Base 106

[0038] Support frame 107

[0039] Linear fixing 108

[0040] Linear guide 109

[0041] Linear ruler 110 Guide sleeve 111 Straight rod 112 Inductive micrometer 113 Fixed seat 114 Sliding member 115 Reading head 116 Fixed plate 117 Mobile plate 118 Locking handle 119 Positioning piece 120 Positioning body 121 Stretching guide 122 Lock nut 123 Groove 124 Tilt sensor 125 Laser displacement sensor 126 Display 127 Magnetic table base 128 Base 129 Fine-tuning device 130 Level adjustment seat 1301 L-shaped bracket 1302 Heightening nut 1303 Support arm 1304 Screw 1305 Displacement detection device 200 Displacement component 201 DETAILED DESCRIPTION

[0042] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0046] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0049] Figure 1 A schematic structural diagram of an online displacement calibration device according to an embodiment of the present invention is shown. Figure 2 The figure shows an online displacement calibration device in use according to one embodiment of the present invention. As shown, the present invention provides an online displacement calibration device 100 suitable for use with a displacement detection device 200. The online displacement calibration device 100 includes a first connecting assembly 102, a fixed protection assembly 103, two sets of linear spring guide sleeve assemblies 104, and a second connecting assembly 105. It should be noted that the displacement detection device 200 can be a displacement detection device such as a displacement actuator or a displacement sensor. In this embodiment, the displacement detection device 200 is a displacement actuator.

[0050] The first connecting assembly 102 serves as the basic connecting unit for connecting the displacement detection device 200 and mainly includes a base 106 and a support frame 107. The base 106 is fixedly coupled with the displacement detection device 200. Specifically, the base 106 is directly fixed to the surface of the displacement detection device 200, and the support frame 107 is vertically arranged on the base 106.

[0051] The fixed protection assembly 103 includes a linear fixture 108 and a linear guide 109. The linear guide 109 is mounted at the bottom of the fixture 108. A grating scale 110 is located on the bottom surface of the linear guide 109. The grating scale 110 serves as a reference element for displacement measurement. The fixed protection assembly 103 is suitable for grating scales 110 with different ranges.

[0052] Each set of linear spring guide sleeve assemblies 104 includes a guide sleeve 111 and a straight rod 112. The guide sleeve 111 is fixedly arranged on the support frame 107. The straight rod 112 passes through the guide sleeve 111 and is inserted into the support frame 107. The bottom of the straight rod 112 is movably connected to the linear fixing member 108 (hinged or bearing-connected), and the top of the straight rod 112 is used to set an inductive micrometer 113. The two inductive micrometers 113 are used to monitor the vertical height deviation of the two straight rods 112. Based on the vertical height deviation, the horizontal position of the fixed protection assembly 103 is adjusted by the straight rods 112 on the two sets of linear spring guide sleeve assemblies 104, so that the grating scale 110 is parallel to the axis of the displacement detection device 200, so as to meet the online high-precision calibration requirements of the displacement detection device 200.

[0053] The second connecting assembly 105 is a displacement acquisition unit. It includes a fixed base 114 and a sliding member 115 connected to the fixed base 114. The fixed base 114 is fixed to the displacement component 201 of the displacement detection device 200 and moves synchronously with the displacement component 201. The sliding member 115 forms a sliding engagement with the linear guide 109. A reading head 116 is mounted on the fixed base 114 and cooperates with the grating scale 110 to acquire displacement data in real time.

[0054] The present invention provides an online displacement calibration device 100 that constructs a complete on-site calibration system through the mechanical linkage of a first connecting component 102, a second connecting component 105, a fixed protection component 103, and a linear spring guide sleeve component 104. During installation, the device base 106 is first fixed to the surface of the displacement detection device 200 through the first connecting component 102. Subsequently, the guide sleeve 111 of the linear spring guide sleeve component 104 cooperates with the straight rod 112, and combined with the real-time monitoring of the inductive micrometer 113, the vertical position of the grating scale 110 in the fixed protection component 103 is dynamically adjusted to gradually align the axis of the grating scale 110 with the axis of the displacement component 201 of the displacement detection device 200 in parallel. At the same time, the sliding member 115 of the second connecting component 105 slides along the linear guide rail 109, driving the reading head 116 to move synchronously with the displacement component 201, ensuring that the measurement reference is highly consistent with the motion trajectory of the object being measured.

[0055] In some examples, the base 106 includes a fixed plate 117 and a movable plate 118, and the support frame 107 is fixed to the movable plate 118. The movable plate 118 can move vertically relative to the fixed plate 117 to adjust the height of the support frame 107. Specifically, the fixed plate 117, as a basic mounting component, can be rigidly connected to the fixed end of the displacement detection device 200 through magnetic attraction, bolt fastening, or claw clamping to provide a stable mounting reference surface. The movable plate 118 is stacked on top of the fixed plate 117, and the two can form a sliding connection through a guide mechanism such as a linear track, a screw nut pair, or a dovetail groove, allowing the movable plate 118 to move up and down in a direction perpendicular to the axis of the displacement component 201 and easily locked by bolts. The support frame 107 is vertically fixed to the movable plate 118, and its height changes with the adjustment of the movable plate 118, thereby driving the linear spring guide sleeve assembly 104, the fixed protection assembly 103, and other components fixed to the support frame 107 to rise and fall as a whole, thereby facilitating the adjustment of the distance between the grating scale 110 and the displacement component 201.

[0056] In some examples, the length direction of the support frame 107 is parallel to the axial direction of the displacement component 201 to ensure the basic geometric constraints of the online calibration accuracy.

[0057] Figure 3A A schematic structural diagram of a linear spring guide sleeve assembly according to an embodiment of the present invention is shown. Figure 3B yes Figure 3A Combined with the top view of Figure 1 As shown, in some examples, the guide sleeve 111 is used to lock or release the straight rod 112. When the guide sleeve 111 is in the released state, the straight rod 112 can move up and down relative to the guide sleeve 111. When the guide sleeve 111 is in the locked state, the guide sleeve 111 secures the straight rod 112. In other words, the guide sleeve 111 integrates a bidirectional controllable locking mechanism, which dynamically constrains the straight rod 112 through mechanical linkage. The guide sleeve 111 employs a spring-loaded sliding sleeve structure. When in the released state, the locking member inside the guide sleeve 111 separates from the surface of the straight rod 112, allowing the straight rod 112 to slide freely up and down along the axis of the guide sleeve 111 (perpendicular to the axial direction of the displacement component 201). As will be readily understood, during the installation phase, the locking handle 119 of the guide sleeve 111 is released, and the straight rod 112 can be raised and lowered synchronously with the fixed protection assembly 103. The height difference, which is fed back in real time by the inductive micrometer 113 located at the top of the straight rod 112, allows the vertical distance between the grating scale 110 and the displacement component 201 to be quickly adjusted until the coaxiality deviation falls within the initial calibration range. In the locked state, by operating the locking handle 119 , the locking member is driven to tightly engage with the surface of the straight rod 112 to form a rigid connection.

[0058] It should be noted that the spring inside the guide sleeve 111 is elastic and deforms when subjected to external forces. Within the guide sleeve 111, the weight of the tooling itself exerts a force on the spring, causing it to compress or stretch. According to Hooke's law, within the elastic limit, the spring force F is proportional to the deformation x, i.e., F = kx (k is the spring constant). During deformation, the spring stores elastic potential energy, and the direction of this elastic force is opposite to that of gravity, thereby partially offsetting the load caused by the tooling's weight. In the linear spring guide sleeve assembly 104, the elastic force generated by the spring in the guide sleeve 111 forms a pair of balancing forces with the weight of the tooling. When the spring force and the weight of the tooling are equal in magnitude and opposite in direction, a state of force equilibrium is achieved in the vertical direction. At this point, the gravitational load on the tooling is effectively offset by the spring force, reducing the tensile and compressive loads on the grating scale 110 and the grating measuring head, and protecting the relevant measuring components.

[0059] Figure 4 FIG1 shows a schematic structural diagram of a positioning member according to an embodiment of the present invention. Figure 1 As shown, in some examples, the fixed protection assembly 103 further includes a plurality of positioning members 120, which are arranged along the length of the linear guide rail 109. The height of the positioning members 120 is adjustable, and the bottom of the positioning members 120 contacts the surface of the displacement component 201. It should be noted that the positioning members 120 serve as auxiliary alignment tools during the installation phase and are only used during the initial installation of the device to coarsely adjust the coaxiality of the grating scale 110 and the displacement component 201, thereby reducing the adjustment load of the linear spring guide sleeve assembly 104. The specific workflow is as follows:

[0060] During installation, the height of the positioning member 120 is adjusted to meet the test requirements (the distance limit between the grating scale 110 and the displacement member 201). The positioning member 120 is fixed to the linear guide rail 109 so that the displacement member 201 of the actuator extends outward.

[0061] Loosen the locking handle 119 of the guide sleeve 111 and adjust the straight rod 112 to lower the fixed protection assembly 103 so that the bottom of the positioning member 120 contacts the surface of the displacement component 201 to form a support. Operate the locking handle 119 to lock the guide sleeve 111 to the straight rod 112, fix the position of the grating scale 110, and remove the positioning member 120 to complete the coarse adjustment task.

[0062] Preferably, the positioning member 120 includes a positioning body 121, a stretching guide rail 122 and a locking nut 123. The stretching guide rail 122 and the positioning body 121 are slidably matched, the top of the stretching guide rail 122 is slidably matched with the linear guide rail 109, and the locking nut 123 is matched with the positioning body 121 to fix the height position of the stretching guide rail 122. The top of the stretching guide rail 122 is slidably matched with the linear guide rail 109 to adjust the height of the positioning member 120, which is fixed by the locking nut 123. The positioning body 121 is designed as a V-groove structure with an upward opening. The surface of the V-groove fits with the displacement component 201 to form a multi-point support, which is conducive to quickly coarsely adjusting the coaxiality of the grating scale 110 and the displacement component 201.

[0063] In some examples, a groove 124 is formed on the top of the stretching guide rail 122, and the groove 124 matches the shape of the bottom of the linear guide rail 109. The positioning member 120 is adapted to be clamped to the bottom of the linear guide rail 109 through the stretching guide rail 122, making installation convenient.

[0064] In some examples, reference Figure 1 , an inclination sensor 125 is provided on the base 106. The inclination sensor 125 is used to monitor in real time the angle between the axis of the displacement component 201 of the displacement detection device 200 and the length direction of the grating scale 110, and quantify the source of cosine error during the calibration process. The inclination sensor 125 is embedded in the fixed plate 117 of the base 106, and its sensitive axis is parallel to the axis of the displacement component 201, ensuring that the measurement reference is consistent with the axial direction of the displacement component 201. The measurement principle of the inclination sensor 125 is to output the angle between the axis of the displacement component 201 and the grating scale 110 in real time by detecting the gravitational acceleration component or the angle change in the inertial coordinate system.

[0065] In some examples, a laser displacement sensor 126 is provided on the fixing base 114. The laser displacement sensor 126 is used to monitor the relative distance between the fixing base 114 and the end face of the optical scale 110 in the fixed protection assembly 103 in real time, thereby providing an anti-pull protection mechanism for the optical scale 110. During calibration, when the displacement component 201 drives the fixing base 114 to move, and the distance between the laser displacement sensor 126 and the optical scale 110 exceeds 1 mm (a safety threshold), the laser sensor is triggered to send an abnormal signal.

[0066] In some examples, the online displacement calibration device 100 further includes a controller and a display 127. The controller is electrically connected to the displacement detection device 200, the inductive micrometer 113, the inclination sensor 125, and the laser displacement sensor 126. The controller is used to control the operation of the displacement detection device 200, and the controller receives the detection results of the inductive micrometer 113, the inclination sensor 125, and the laser displacement sensor 126. Based on the detection results, it is determined whether the length direction of the grating scale 110 and the axial direction of the displacement component 201 are coaxial, and the detection result and / or the judgment result are sent to the display 127. Specifically, the controller receives the displacement signal obtained by the laser displacement sensor 126. As an example and not a limitation, if it is determined that the spacing between the laser displacement sensor 126 and the grating scale 110 exceeds 1 mm, it is determined that there is a straightness deviation between the length direction of the grating scale 110 and the axial direction of the displacement component 201. The controller receives the angle between the axis of the displacement component 201 of the displacement detection device 200 and the length direction of the grating ruler 110 as monitored by the inclination sensor 125. As an example and not a limitation, if the angle is greater than 1 degree, it is determined that there is an angular deviation between the length direction of the grating ruler 110 and the axial direction of the displacement component 201. The controller receives the vertical height of the straight rod 112 monitored by the inductive micrometer 113, calculates the deviation between the two, and if the deviation between the two exceeds a threshold, it is determined that there is a coaxiality abnormality between the length direction of the grating ruler 110 and the axial direction of the displacement component 201. The threshold can be set to 1 mm. The controller sends the received signal, calculation result and / or judgment result to the display 127 for display. The controller can generate a warning signal based on the judgment result, and the warning signal can be displayed on the display 127, or an alarm can be implemented through other alarm devices such as a buzzer.

[0067] Figure 5 FIG1 shows a schematic diagram of the structure of an online displacement calibration device according to another embodiment of the present invention. As shown in the figure, the online displacement calibration device 100 is Figure 1 and Figure 2 Like the embodiments in

[15] , the first connecting assembly 102, the fixed protection assembly 103, and the linear spring guide sleeve assembly 104 are included. The difference is that a magnetic base 128 is provided at the bottom of the fixing plate 117 of the first connecting assembly 102. The core function of the magnetic base 128 is to provide a stable measurement reference by adsorbing on the metal surface through its magnetic base. When the housing of the device being calibrated is an iron device, such as the displacement actuator 200, threaded fastening is not required. Instead, magnetic attraction through the magnetic base 128 enables faster installation, making it more versatile and convenient, and further improving installation efficiency.

[0068] Figure 6 A schematic structural diagram of an online displacement calibration device according to another embodiment of the present invention is shown. Figure 7A A front view of a fine-tuning device according to another embodiment of the present invention is shown. Figure 7BThe figure shows a left view of a fine-tuning device according to another embodiment of the present invention. As shown in the figure, the online displacement calibration device 100 is specifically used for calibrating the displacement sensor. The online displacement calibration device 100 also includes a first connecting component 102, a fixed protection component 103 and a linear spring guide sleeve component 104. A base 129 is provided at the bottom of the fixed plate 117 of the first connecting component 102. The fixed plate 117 is provided at one end of the base 129, and a fixed fine-tuning device 130 is provided at the other end of the base 129. The fixed fine-tuning device 130 can well adjust the measuring axis of the displacement sensor so that it complies with the Abbe principle. Reference Figure 7A and Figure 7B The fixed fine-tuning device 130 includes a horizontal adjustment base 1301, an L-shaped bracket 1302, a height adjustment nut 1303, a support arm 1304, and a screw 1305. The L-shaped bracket 1302 is fixed to the base 129 via the horizontal adjustment base 1301. The horizontal adjustment base 1301 is provided with a threaded track. The bottom of the L-shaped bracket 1302 is threadedly engaged with the threaded track. Rotating the threaded track is used to adjust the position of the horizontal adjustment base 1301 in the direction of the threaded track. A pair of height adjustment nuts 1303 are provided on the L-shaped bracket 1302. One end of the support arm 1304 is movably connected to the L-shaped bracket 1302 and is located between the pair of height adjustment nuts 1303. By adjusting the height of the height adjustment nuts 1303, the height of the support wall can be adjusted. Screw 1305 is provided on the support arm 1304 and is used to fix the displacement sensor. As can be easily understood, the displacement sensor is fixed to the L-shaped bracket 1302 via screw 1305. Then, the fixed fine-tuning device 130 is used to adjust the horizontal position of the displacement sensor, and the height of the support arm 1304 is adjusted by raising the nut 1303, thereby adjusting the height of the displacement sensor so that the displacement axis of the displacement sensor is consistent with the axis of the grating scale 110.

[0069] The online displacement calibration device provided by the present invention has the following advantages:

[0070] 1. Modular and compatible design, adopting the "grating scale + component" mode, one set of components can be flexibly adapted to grating scales of different ranges (up to 1000mm), and the adjustable V-shaped contour blocks (positioning parts) can be adapted to various actuator diameters and heights, significantly improving the versatility of the device.

[0071] 2. Precise coaxiality control and load offset: A linear spring guide sleeve assembly with a locking function uses spring force to offset the tooling gravity load, reducing the tensile and compressive loads on the grating scale. A built-in inductive micrometer monitors coaxiality in real time, triggering an alarm when the deviation exceeds the threshold, ensuring that the measuring axis and the actuator axis are highly aligned. The positioning piece assists in coarse adjustment of coaxiality and is removable after installation to avoid interference with formal calibration.

[0072] 3. The error prevention and control system integrates multiple sensors. The laser displacement sensor monitors the relative distance between the grating scale and the actuator rod in real time, and alarms when it exceeds 1mm to prevent excessive pulling and damage to the grating scale. The inclination sensor detects the cosine error and automatically compensates or alarms when it is greater than 1°, realizing multi-dimensional control of calibration errors.

[0073] 4. Online calibration and rapid on-site deployment: On-site calibration can be completed without disassembling the equipment. Quick installation is achieved through various clamping methods such as magnetic suction and clamping claws. Combined with the lightweight aluminum alloy material, calibration efficiency is significantly improved. The controller and display are linked to display test data, deviation analysis and calibration results in real time. Automatic alarm and data recording are supported, realizing intelligent "install and calibrate" operation.

[0074] 5.Innovative mechanical structure and reliable design, the guide sleeve’s “release-lock” dual-state mechanism takes into account both installation and adjustment flexibility and measurement stability.

[0075] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. An online displacement calibration device, suitable for a displacement detection device, comprising: A first connecting assembly includes a base and a support frame, wherein the base is fixedly coupled with the displacement detection device, and the support frame is arranged on the base; A fixed protection assembly includes a linear fixing member and a linear guide rail, wherein the linear guide rail is arranged at the bottom of the linear fixing member, and a grating ruler is provided on the bottom surface of the linear guide rail; Two sets of linear spring guide sleeve assemblies, each set of the linear spring guide sleeve assemblies includes a guide sleeve and a straight rod, the guide sleeve is arranged on the support frame, the straight rod is passed through the support frame and is located in the guide sleeve, the bottom of the straight rod is movably connected to the linear fixing member, and the top of the straight rod is used to set an inductive micrometer; The second connecting component includes a fixed seat and a sliding member connected to the fixed seat. The fixed seat is fixed on the displacement component of the displacement detection device. The sliding member slides in cooperation with the linear guide rail. A reading head is provided on the fixed seat.

2. The online displacement calibration device according to claim 1, characterized in that: The base includes a fixed plate and a movable plate. The support frame is fixed on the movable plate. The movable plate can move in a vertical direction relative to the fixed plate to adjust the height of the support frame.

3. The online displacement calibration device according to claim 2, characterized in that: The length direction of the support frame is parallel to the axial direction of the displacement component.

4. The online displacement calibration device according to claim 1, characterized in that: The guide sleeve is used to lock or release the straight rod. When the guide sleeve is in a released state, the straight rod can move up and down relative to the guide sleeve. When the guide sleeve is in a locked state, the straight rod is fixed.

5. The online displacement calibration device according to claim 1, wherein: The fixed protection component also includes a plurality of positioning members, which are arranged in the length direction of the linear guide rail. The height of the positioning members is adjustable, and the bottom of the positioning members is in contact with the surface of the displacement component.

6. The online displacement calibration device according to claim 5, characterized in that: The positioning member includes a positioning body, a stretching guide rail and a locking nut. The stretching guide rail and the positioning body are slidably matched, the top of the stretching guide rail is slidably matched with the linear guide rail, and the locking nut is matched with the positioning body to fix the height position of the stretching guide rail.

7. The online displacement calibration device according to claim 6, characterized in that: A groove is provided on the top of the stretching guide rail, and the groove matches the shape of the bottom of the linear guide rail.

8. The online displacement calibration device according to claim 1, wherein: An inclination sensor is provided on the base.

9. The online displacement calibration device according to claim 8, characterized in that: A laser displacement sensor is provided on the fixing seat.

10. The online displacement calibration device according to claim 9, characterized in that: The online displacement calibration device also includes a controller and a display. The controller is electrically connected to the displacement detection equipment, the inductive micrometer, the inclination sensor and the laser displacement sensor. The controller is used to control the action of the displacement detection equipment. The controller receives the detection results of the inductive micrometer, the inclination sensor and the laser displacement sensor, determines whether the length direction of the grating scale and the axial direction of the displacement component are coaxial based on the detection results, and sends the detection results and / or judgment results to the display.

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