Automatic calibration device for calibrating angle meter instruments

Abstract

The invention provides an automatic calibration device for calibrating an angle meter type instrument. The automatic calibration device comprises a grating type indexing table, a connecting shaft sleeve, a measured instrument, a fixing assembly data line, an arm support, a digital display and control calculation unit and a workbench. Before measurement, a calibrated angle meter is installed on the grating type indexing table through the connecting shaft sleeve and is fixed through the fixing assembly on the arm support, measurement is set through the digital display and control calculation unit, the microprocessor sends out an instruction, the grating type indexing table rotates according to the instruction and stays in a positioning mode, and measurement is completed. Measurement data of the measured instrument is transmitted to the digital display and control calculation unit through a data line, and measurement errors of all points are obtained. The automatic calibration device for calibrating the angle meter instruments has the advantages that the problem that in a traditional measurement method, the precision is low, and the requirement cannot be met is solved, measurement data are processed through computer software, the detection efficiency and the measurement precision are greatly improved, and the probability of personal errors is also reduced.

Description

Technical Field

[0001] The invention relates to the field of geometric quantity calibration, and in particular to an automatic calibration device for calibrating angle meter instruments. Background Art

[0002] With the rapid development of metrology and machining technology, the accuracy of machining and assembly has also improved in recent years, so higher requirements are also put forward for various measuring instruments. Various models and functions of angle measuring instruments have also been developed. High-precision angle meters are advanced angle measuring instruments designed and developed to facilitate measurement and improve measurement accuracy. There are no standard technical documents in China to guide verification or calibration of this type of equipment. The method of comparing with angle blocks is used for traceability of measurement values. However, there are two problems with the current method. One is that the reliability of the calibration result is not high, the measurement standard accuracy is low, and the error caused by the measurement method is large, resulting in a large uncertainty in the measurement result. The other is that the calibration state is inconsistent with the measurement state, and the resulting indication error is not comprehensive and cannot accurately reflect the measurement accuracy of the instrument. Summary of the invention

[0003] The purpose of the present invention is to accurately and quickly calibrate the indication error of high-precision angle meter type angle measuring instruments, and ensure that the measurement results are accurate and reliable, and the measurement uncertainty of the calibration results meets the requirements. An automatic calibration device for calibrating angle meter type instruments is specially provided.

[0004] The present invention provides an automatic calibration device for calibrating angle gauge instruments, characterized in that: the automatic calibration device for calibrating angle gauge instruments comprises: a grating indexing table 1, a connecting sleeve 2, a measured instrument 3, a fixing component 4, a data line 5, an arm 6, a digital display and control calculation unit 7, and a workbench 8;

[0005] Before measurement, the calibrated angle gauge 3 is installed on the grating type dividing table 1 through the connecting sleeve 2 and fixed by the fixing component 4 on the arm 6. The measurement is set by the digital display and control calculation unit 7. The microprocessor sends out instructions, and the grating type dividing table 1 rotates and stops at the position according to the instructions. The measurement data of the measured instrument 3 is transmitted to the digital display and control calculation unit 7 through the data line 5, so as to obtain the measurement error of each point.

[0006] The automatic calibration device for calibrating angle gauges also includes a manual measurement component designed to increase the measurement function and realize the measurement of any angle and non-equidistant setting angles. The measurement device is also designed to perform measurement by manual positioning, such as Figure 2 The manual parts of the digital display indexing table include: a connecting shaft 9, a fine-tuning drum wheel 10 and a rotating handle 11; the fine-tuning drum wheel 10 and the rotating handle 11 are both connected to the indexing table, and the indexing table is connected to the connecting shaft 9.

[0007] The main standard grating indexing table of the fully automatic standard angle measuring device uses the circular grating angle measurement principle to measure and display. The circular grating is a high-precision angle measurement standard and a high-precision angle measurement instrument.

[0008] According to the measuring principle of the angle gauge, it is determined that a rotary indexing table that rotates coaxially with the angle gauge is used as the traceability method. Precise coaxial installation is achieved through the design of the overall structure, and then the purpose of accurate measurement is achieved through the numerical control and measurement system.

[0009] The measurement method is:

[0010] First, the calibrated angle gauge 3 is installed on the dividing table 1 through the connecting sleeve 2, and the other end is fixed to the arm 6 through the fastening assembly 4. According to the angle to be measured, the dividing table is first roughly positioned by turning the hand wheel 11, and then the fine-tuning drum wheel 10 is used for precise positioning until the measured angle is accurately displayed on the digital display screen 7. At this time, the angle value is read on the measured instrument 3, and the difference between the two angle values ​​is the error of the measured point.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The automatic calibration device for calibrating angle meter instruments described in the present invention solves the problem of low accuracy in traditional measurement methods that cannot meet the requirements. By processing the measurement data through computer software, the detection efficiency and measurement accuracy are greatly improved, and the probability of human error is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of a fully automatic angle measuring instrument calibration device;

[0015] Figure 2 This is the structural diagram of the digital indexing table;

[0016] Figure 3 Principle and composition diagram of digital display and control calculation unit;

[0017] In the figure, 1, grating indexing table, 2, connecting sleeve, 3, instrument under test, 4, fixing component, 5, data cable, 6, arm, 7, digital display and control calculation unit, 8, workbench, 9 connecting shaft, 10 fine-tuning drum, 11 rotating handle, 12 MCU: stm8L052R8, 13 LCD display panel, 14 key code disk, 15 solenoid valve switch, 16 data signal input and output, 17 power supply. DETAILED DESCRIPTION

[0018] The present invention will be further explained below in conjunction with specific implementation plans, but the present invention is not limited thereto. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] The present invention provides an automatic calibration device for calibrating angle gauge instruments, characterized in that: the automatic calibration device for calibrating angle gauge instruments comprises: a grating indexing table 1, a connecting sleeve 2, a measured instrument 3, a fixing component 4, a data line 5, an arm 6, a digital display and control calculation unit 7, and a workbench 8;

[0020] Before measurement, the calibrated angle gauge 3 is installed on the grating type dividing table 1 through the connecting sleeve 2 and fixed by the fixing component 4 on the arm 6. The measurement is set by the digital display and control calculation unit 7. The microprocessor sends out instructions, and the grating type dividing table 1 rotates and stops at the position according to the instructions. The measurement data of the measured instrument 3 is transmitted to the digital display and control calculation unit 7 through the data line 5, so as to obtain the measurement error of each point.

[0021] The automatic calibration device for calibrating angle gauges also includes a manual measurement component designed to increase the measurement function and realize the measurement of any angle and non-equidistant setting angles. The measurement device is also designed to perform measurement by manual positioning, such as Figure 2 The manual parts of the digital display indexing table include: a connecting shaft 9, a fine-tuning drum wheel 10 and a rotating handle 11; the fine-tuning drum wheel 10 and the rotating handle 11 are both connected to the indexing table, and the indexing table is connected to the connecting shaft 9.

[0022] The main standard grating indexing table of the fully automatic standard angle measuring device uses the circular grating angle measurement principle to measure and display. The circular grating is a high-precision angle measurement standard and a high-precision angle measurement instrument.

[0023] According to the measuring principle of the angle gauge, it is determined that a rotary indexing table that rotates coaxially with the angle gauge is used as the traceability method. Precise coaxial installation is achieved through the design of the overall structure, and then the purpose of accurate measurement is achieved through the numerical control and measurement system.

[0024] The measurement method is:

[0025] First, the calibrated angle gauge 3 is installed on the dividing table 1 through the connecting sleeve 2, and the other end is fixed to the arm 6 through the fastening assembly 4. According to the angle to be measured, the dividing table is first roughly positioned by turning the hand wheel 11, and then the fine-tuning drum wheel 10 is used for precise positioning until the measured angle is accurately displayed on the digital display screen 7. At this time, the angle value is read on the measured instrument 3, and the difference between the two angle values ​​is the error of the measured point.

[0026] Matters not covered by the present invention are known technologies.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic calibration device for calibrating angle meter instruments, characterized in that: The automatic calibration device for calibrating angle meter instruments comprises: a grating indexing table (1), a connecting shaft sleeve (2), a measured instrument (3), a fixing component (4), a data line (5), an arm (6), a digital display and control calculation unit (7), and a workbench (8); Before measurement, the calibrated angle gauge (3) is mounted on the grating indexing table (1) via a connecting sleeve (2) and fixed via a fixing assembly (4) on an arm (6). The measurement is set via a digital display and control calculation unit (7). The microprocessor issues an instruction, and the grating indexing table (1) rotates and stops at a position according to the instruction. The measurement data of the instrument under test (3) is transmitted to the digital display and control calculation unit (7) via a data line (5), thereby obtaining the measurement error of each point.

2. The automatic calibration device for calibrating angle meter instruments according to claim 1, characterized in that: The automatic calibration device for calibrating angle meter instruments also includes a manual measuring component, and the measurement is performed by manual positioning. The manual component of the digital display indexing table includes: a connecting shaft (9), a fine-tuning drum wheel (10) and a rotating handle (11); the fine-tuning drum wheel (10) and the rotating handle (11) are both connected to the indexing table, and the indexing table is connected to the connecting shaft (9).

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