A standard with compensation

Abstract

This invention discloses a compensated standard, belonging to the field of geometric measurements. The invention includes: a base support, a displacement adjustment stage, and measuring target bodies. The base support is made of indium steel. The displacement adjustment stage is installed above the base support, enabling precise one-dimensional movement of the upper slide along the scale direction, and achieving high-precision positioning through closed-loop feedback. Two measuring target bodies are respectively installed on the base support and the displacement adjustment stage. Mechanical installation and adjustment ensure that the center distance of each set of targets on both sides is consistent. This invention uses indium steel with a low coefficient of linear expansion as the base material, combined with a temperature compensation system, to display the standard length value after temperature compensation in real time. Through one-dimensional motion compensation of the displacement adjustment stage, the standard length value remains constant under temperature changes. It simulates the length value changes of one-dimensional standards made of different materials at different temperatures, and can be used for calibration in measurement applications where the measured object and the standard must be made of the same material.

Description

Technical Field

[0001] This invention relates to a compensated standard, belonging to the field of geometric quantities. Background Technology

[0002] With the continuous development of national industrialization, large-scale metrology equipment, including laser trackers, theodolites, scanning measuring cameras, and articulated arms, is gradually being used in the daily production processes of enterprises and institutions in various industries. During the production and application of these large-scale measuring devices, calibration is required in on-site or laboratory environments. In most cases, on-site applications have higher requirements, thus necessitating the use of appropriate calibration standards or devices to ensure the measurement capabilities of the equipment.

[0003] Currently, static calibration of commonly used large-size measuring equipment is mainly achieved through the following two methods:

[0004] The first method involves using a rod or profile of a certain unit length as the main body of the calibration standard. Target mounting bases of the same type are installed on both sides of the rod or profile. These mounting bases can be fixed spherical or replaceable adsorption type. A coordinate measuring machine is used to calibrate the distance and position between the two target mounting bases, and the standard values ​​are used to calibrate large-scale measuring equipment. However, this method is limited by the material used for the rod or profile. If the rod or profile is made of a material highly susceptible to temperature changes, the nominal value will differ significantly from the actual measured value in environments with large temperature variations. Even with materials with low coefficients of linear expansion, such as carbon fiber indium steel, the actual measured value still requires some compensation under conditions of large temperature differences. Therefore, this type of calibration standard is typically used in laboratory calibration and is not suitable for calibration work in environments with large temperature variations. Furthermore, the target being measured is relatively singular, and a single standard is often only suitable for calibrating a single type of instrument.

[0005] The first method involves establishing a horizontal track device. A standard running guide rail is installed on the top surface of the track, and the device is adjusted to a horizontal running guide rail device with high straightness through equipment debugging. Then, a grating or interferometer is used as a standard, and temperature data is collected by a temperature sensor for compensation to achieve standard calibration. This method requires the construction of a fixed track device, which has large requirements for the site space. When the equipment is large, multiple sensors need to be installed to achieve compensation, and the control requirements are higher. It is difficult to achieve portable on-site calibration. Only some of the equipment to be calibrated can be moved in reverse to the calibration equipment. Calibration cannot be performed on some equipment that cannot be moved. Summary of the Invention

[0006] The purpose of this invention is to provide a compensated standard, preferably using indium steel as the base material, equipped with a temperature compensation system that can display the length value of the standard after temperature compensation in real time; equipped with a one-dimensional compensation motion system that can achieve a constant length value of the standard under temperature changes through one-dimensional displacement; by inputting different material parameters and nominal parameters, combined with the one-dimensional compensation motion system, the length value change of the one-dimensional standard of different materials under different temperature conditions can be simulated, which is suitable for calibration in measurement occasions where the measured object and the standard are required to be of the same material.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] The present invention provides a compensated standard, comprising: a base support, a displacement adjustment platform, and a measuring target body;

[0009] The basic support structure includes: ruler body, support feet, display and compensation module, level, input module, grating ruler, plug, locking nut, wiring channel, motor mounting platform, and base mounting seat;

[0010] The displacement adjustment table includes: a motor, a coupling, a first support base, a screw nut, a ball screw, a second support base, an upper slide, a bottom base, a reading head, and a reading head mounting base;

[0011] The measuring target body is installed on each of the left and right sides of the ruler body, including: the target ball to be measured, the target fixing seat, the photographic target, the bidirectional adjustment seat, the pin, the adsorption target seat, and the target mounting block;

[0012] The ruler body, serving as the basic structure of the device of this invention, is preferably made of indium steel. The bottom of the ruler body is equipped with the support pins and the locking nut; the support pins preferably employ three-point support, and the support pins and locking nut provide a leveling function; the display and compensation module and the input module are installed at the middle of the side of the ruler body; the display and compensation module can display the length value in real time and achieve temperature compensation; the input module is used to input different parameters to simulate the length states of rulers made of different materials; the internal cables of the display and compensation module and the input module are connected via the... The cable tray connects to the plug near the left side to provide external power and enable data conversion; a threaded pin hole is provided at one end of the top right side of the ruler body for mounting the measuring target body on the right side; the level is arranged in the middle part of the top surface of the ruler body, and leveling is achieved by the support pins; the base mounting base and the motor mounting platform are machined on the left side of the top surface of the ruler body, the base mounting base is used to mount the bottom base, and the motor mounting platform is used to mount the motor; the grating ruler is mounted on the side of the base mounting base for measuring the movement displacement of the measuring target body.

[0013] The motor is mounted on the motor mounting platform at the top of the ruler body. The output shaft of the motor is connected to the ball screw via the coupling. One side of the ball screw is fixed to the first support seat mounted on the motor mounting platform, and the other side of the ball screw is fixed to the second support seat on the bottom base platform. The bottom base platform is precisely fitted to the base platform mounting seat on the left side of the ruler body. An upper slide is mounted above the bottom base platform. The bottom base platform and the upper slide are connected by a precision dovetail structure to achieve precise one-dimensional motion. The nut of the ball screw is fixedly connected to the upper slide to drive the upper slide to move along the dovetail guide rail of the bottom base platform. The top of the upper slide has a threaded pin hole for mounting the measuring target body on the left side. A reading head mounting seat is mounted on the side of the upper slide to mount the reading head and realize real-time reading of displacement value during the movement of the upper slide.

[0014] The target mounting block, as the main structure of the measuring target body, is preferably made of indium steel. The target mounting block is mounted on the upper slide on the left side of the scale body and the top end of the right side of the scale body via pins. The target mounting block is equipped with a target ball, an adsorption target, and a target fixing seat. The target ball is made of matte material and is coaxially mounted with the adsorption target via a coaxial hole, ensuring that the center distance between the target ball used for scanning calibration and the adsorption target used for tracking instrument calibration is consistent. A target fixing seat is mounted on the top of the target mounting block for mounting the bidirectional adjustment seat. The position of the bidirectional adjustment seat in the planar direction is adjusted by a set screw mounted on the target fixing seat, allowing for fine-tuning of the center distance between the photographic targets on the top of the two bidirectional adjustment seats, ensuring that the distance between the center of the photographic target and the target ball and the center of the adsorption target remains consistent.

[0015] Beneficial effects:

[0016] 1. The base support body of the standard with compensation of the present invention is made of a material with a low coefficient of linear expansion, which can effectively reduce the impact of temperature.

[0017] 2. The standard with compensation of the present invention realizes the leveling function through the support pin, uses the grating as the length change reference, displays the length value in real time and realizes temperature compensation through the display and compensation module, and inputs different parameters through the input module to simulate the length state of other scales of different materials.

[0018] 3. The displacement adjustment stage of the standard with compensation of the present invention adopts a drive form of precision ball screw combined with high-precision dovetail groove guide rail, which can realize precise one-dimensional movement of the upper slide table along the scale direction, and achieve high-precision positioning through grating closed-loop feedback.

[0019] 4. The measuring target body of the standard with compensation of the present invention is equipped with a variety of different targets, and the center distance of each group of targets on both sides of the measuring target body is consistent through mechanical installation and adjustment, which effectively expands the applicable range of the standard. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of a compensated standard according to the present invention;

[0021] Figure 2 This is a schematic diagram of the basic support structure of a standard with compensation according to the present invention;

[0022] Figure 3 This is a schematic diagram of the displacement adjustment stage structure of a compensation standard device according to the present invention;

[0023] Figure 4 This is a schematic diagram of the measuring target body structure of a compensated standard device according to the present invention;

[0024] Figure 5 This is a schematic diagram of the overall operation of a compensated standard according to the present invention;

[0025] Among them, 1—measuring target body, 2—displacement adjustment platform, 3—basic support body, 4—support pin, 5—scale body, 6—display and compensation module, 7—level, 8—input module, 9—motor, 10—upper slide, 11—grating scale, 12—ball screw, 13—adsorption target, 14—photographic target, 15—target mounting block, 16—reading head, 17—bottom base platform, 18—target ball, 19—nut, 20—plug, 21—locking nut, 22—wiring groove, 23—motor mounting platform, 24—base platform mounting seat, 25—pin, 26—bidirectional adjustment seat, 27—target fixing seat, 28—coupling, 29—first support seat 1, 30—second support seat, 31—reading head mounting seat. Detailed Implementation

[0026] To better illustrate the purpose and advantages of the present invention, the invention will be further described below in conjunction with the accompanying drawings and examples.

[0027] Example 1:

[0028] like Figure 1 As shown, a compensated standard in an embodiment includes: a base support 3, a displacement adjustment platform 2, and a measuring target 1;

[0029] like Figure 2 As shown, the basic support body 3 includes: ruler body 5, support nail 4, display and compensation module 6, level 7, input module 8, grating ruler 11, plug 20, locking nut 21, cable tray 22, motor mounting platform 23, and base platform mounting base 24.

[0030] like Figure 3 As shown, the displacement adjustment table 2 includes: a motor 9, a coupling 28, a first support 29, a screw nut 19, a ball screw 12, a second support 30, an upper slide table 10, a bottom base 17, a reading head 16, and a reading head mounting base 31.

[0031] like Figure 4 As shown, one measuring target body 1 is installed on each of the left and right sides of the ruler body 5, including: the target ball to be measured 18, the target fixing seat 27, the photographic target 14, the bidirectional adjustment seat 26, the pin 25, the adsorption target 13, and the target mounting block 15.

[0032] The ruler body 5 serves as the basic structure and is made of indium steel in this embodiment. Support pins 4 and locking nuts 21 are installed at the bottom of the ruler body 5. In this embodiment, the support pins 4 are supported at three points, and the support pins 4 and locking nuts 21 achieve leveling. A display and compensation module 6 and an input module 8 are installed in the middle of the side of the ruler body 5. The display and compensation module 6 can display the length value in real time and achieve temperature compensation. The input module 8 is used to input different parameters to simulate the length states of rulers made of different materials. The internal cables of the display and compensation module 6 and the input module 8 are connected through a cable tray 22. Connect to the plug 20 near the left side to achieve external power supply and data conversion; the top right end of the ruler body 5 is provided with a threaded pin hole for mounting the measuring target body 1 on the right side; the middle part of the top surface of the ruler body 5 is provided with a level 7, which is leveled by the support pin 4; the left side of the top surface of the ruler body 5 is machined with a base mounting base 24 and a motor mounting base 23. The base mounting base 24 is used to mount the bottom base 17, and the motor mounting base 23 is used to mount the motor 9; the side of the base mounting base 24 is equipped with a grating ruler 11 for measuring the movement displacement of the measuring target body 1.

[0033] Motor 9 is mounted on motor mounting platform 23 at the top of ruler 5. The output shaft of motor 9 is connected to ball screw 12 via coupling 28. One side of ball screw 12 is fixed to first support 29 mounted on motor mounting platform 23, and the other side of ball screw 12 is fixed to second support 30 on bottom base platform 17. Bottom base platform 17 is precisely fitted to base platform mounting 24 on the left side of ruler 5. Upper slide 10 is mounted above bottom base platform 17. The upper slides 10 are connected by a precision dovetail structure to achieve precise one-dimensional motion; the nut 19 of the ball screw 12 is fixedly connected to the upper slide 10 to drive the upper slide 10 to move along the dovetail guide rail of the bottom base platform 17; the top of the upper slide 10 is provided with a threaded pin hole for mounting the measuring target body 1 on the left; a reading head mounting seat 31 is installed on the side of the upper slide 10, which is used to mount the reading head 16 to realize real-time reading of displacement value during the movement of the upper slide 10;

[0034] The target mounting block 15, as the main structure of the measuring target body 1, is made of indium steel. The target mounting block 15 is installed on the upper slide 10 on the left side of the scale body 5 and the top end of the right side of the scale body 5 by means of pins 25. The target mounting block 15 is equipped with a target ball 18, an adsorption target 13, and a target fixing seat 27. The target ball 18 is made of matte material and is installed with the adsorption target 13 through a coaxial hole to ensure that the center distance of the target ball 18 used for scanning calibration and the adsorption target 13 used for tracking calibration are consistent. A target fixing seat 27 is installed on the top of the target mounting block 15 for installing a bidirectional adjustment seat 26. The position of the bidirectional adjustment seat 26 in the plane direction is adjusted by the set screw installed on the target fixing seat 27, so as to fine adjust the center distance of the photographic target 14 on the top of the two bidirectional adjustment seats 26, and ensure that the distance between the center of the photographic target 14 and the target ball 18 is consistent with the center of the adsorption target 13.

[0035] The above detailed description further illustrates the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A standard with compensation, characterized in that: include: Basic support (3), displacement adjustment platform (2), measuring target body (1); The basic support body (3) includes: ruler body (5), support nail (4), display and compensation module (6), level (7), input module (8), grating ruler (11), plug (20), locking nut (21), cable tray (22), motor mounting platform (23), and base platform mounting base (24); The displacement adjustment table (2) includes: a motor (9), a coupling (28), a first support seat (29), a screw nut (19), a ball screw (12), a second support seat (30), an upper slide (10), a bottom base (17), a reading head (16), and a reading head mounting seat (31); The measuring target body (1) is installed on the left and right sides of the ruler body (5), including: the target ball to be measured (18), the target fixing seat (27), the photographic target (14), the bidirectional adjustment seat (26), the pin (25), the adsorption target seat (13), and the target mounting block (15); The ruler body (5) serves as the basic structure, with support pins (4) and locking nuts (21) installed at its bottom. The support pins (4) are supported at three points, and the support pins (4) and locking nuts (21) achieve the leveling function. A display and compensation module (6) and an input module (8) are installed in the middle of the side of the ruler body (5). The display and compensation module (6) can display the length value in real time and achieve temperature compensation. The input module (8) is used to input different parameters to simulate the length state of other rulers made of different materials. The internal cables of the display and compensation module (6) and the input module (8) are connected to the plug (20) near the left side through the wiring channel (22). The ruler (5) is equipped with an external power supply and data conversion. A threaded pin hole is arranged on the right side of the top surface of the ruler (5) for installing the measuring target body (1) on the right side. A level (7) is arranged in the middle part of the top surface of the ruler (5) and is leveled by the support pin (4). A base mounting seat (24) and a motor mounting seat (23) are machined on the left side of the top surface of the ruler (5). The base mounting seat (24) is used to install the bottom base (17), and the motor mounting seat (23) is used to install the motor (9). A grating ruler (11) is installed on the side of the base mounting seat (24) for measuring the movement displacement of the measuring target body (1). The motor (9) is mounted on the motor mounting platform (23) at the top of the ruler (5). The output shaft of the motor (9) is connected to the ball screw (12) via a coupling (28). One side of the ball screw (12) is fixed to the first support seat (29) mounted on the motor mounting platform (23), and the other side of the ball screw (12) is fixed to the second support seat (30) on the bottom base platform (17). The bottom base platform (17) is precisely fitted to the base platform mounting seat (24) on the left side of the ruler (5). An upper slide (10) is installed above the bottom base platform (17). (17) is connected to the upper slide (10) through a precision dovetail structure to achieve precision one-dimensional motion; the nut (19) of the ball screw (12) is fixedly connected to the upper slide (10) to drive the upper slide (10) to move along the dovetail guide rail of the bottom base platform (17); the top of the upper slide (10) is provided with a threaded pin hole for installing the measuring target body (1) on the left side; the side of the upper slide (10) is provided with a reading head mounting seat (31) for installing the reading head (16) to realize real-time reading of displacement value during the movement of the upper slide (10); The target mounting block (15) serves as the main structure of the measuring target body (1). It is mounted on the upper slide (10) on the left side of the scale body (5) and the top end of the right side of the scale body (5) via pins (25). The target mounting block (15) is equipped with a target ball (18), an adsorption target (13), and a target fixing seat (27). The target ball (18) is made of matte material. The target ball (18) and the adsorption target (13) are mounted through a coaxial hole to ensure that the center is coaxial and to ensure that the target ball (18) used for scanning calibration is centered. The center distance is consistent with the center distance of the adsorption target holder (13) used for tracker calibration; a target fixing seat (27) is installed on the top of the target mounting block (15) for installing the bidirectional adjustment seat (26). The position of the bidirectional adjustment seat (26) in the plane direction is adjusted by the set screw installed on the target fixing seat (27), so as to achieve fine adjustment of the center distance of the photography target (14) on the top of the two bidirectional adjustment seats (26) on the left and right, and ensure that the distance between the center of the photography target (14) and the target ball (18) being measured is consistent with the center of the adsorption target holder (13).

2. A compensated standard as described in claim 1, characterized in that: The ruler body (5) and the target mounting block (15) are made of indium steel with a small coefficient of linear expansion.

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