Verification tool and method for propellant size non-contact measuring instrument

Abstract

The invention discloses a verification tool and method for a propellant size non-contact measuring instrument. The tool comprises a base, a sliding rail, a sliding block seat, a pressing plate, an instrument fixing piece and a standard detection block. During verification, the measuring instrument is controlled, the laser projection point is irradiated to the calibration block, the depth measurement step difference and the radius measurement step difference are obtained, the measurement result is compared with a standard value, and the verification result is verified. The verification tool is designed to be of a detachable structure, the whole tool is of a spliced structure, the positioning measurement requirement of the length of 5 m is met, the device is easy to popularize and use, and the vision measurement verification requirement is met.

Description

Technical Field

[0001] The invention relates to a calibration tool and method for a non-contact measuring instrument for propellant size, belonging to the field of solid rocket engine propellant size measurement. Background Art

[0002] Solid rocket engines are pyrotechnic products, filled with flammable and explosive propellants. The internal hole size of the propellant has strict design requirements. At this stage, the internal construction process of the core rod and demoulding is adopted. Since the propellant is a pyrotechnic product, there are safety hazards of contacting the powder surface when using a ruler to measure the manual measurement. The use of a tape measure to locate the depth and an internal micrometer to measure the radius parameters has human operation quality hazards such as positioning errors and measurement errors. A non-contact laser positioning measurement instrument is designed to complete the non-contact positioning measurement of the propellant to solve safety and quality hazards. Dimensional measurement must be equipped with corresponding calibration tools to complete the depth and radius parameter accuracy calibration of the instrument. According to the regulations on the verification of measuring instruments, the verification of measurement data should adopt the standard data transmission method, and the verification of measurement result parameters should be achieved through the benchmark transmission of data. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose a calibration tool for a non-contact propellant size measuring instrument, to calibrate and verify the depth and radius measurement results of the calibration instrument, and to supplement the accuracy of the measuring instrument.

[0004] The technical solution of the present invention is: a calibration tool for a non-contact measuring instrument for propellant size, comprising: a base, a slide rail, a slide seat, a pressing plate, an instrument fixing part, and a standard inspection block;

[0005] The base is a metal structure with a square groove in the middle and multiple through holes at the bottom for installing the height-adjustable bracket. The top end surface has threaded holes for installing the pressure plate.

[0006] The slide rail is a trapezoidal structure, with a square protrusion designed at the bottom, and the protrusion cooperates with the groove of the base for positioning; a square through hole is dug on the slide rail protrusion for fixing and installing the pressure plate;

[0007] The slider seat is a square structure with a groove designed inside, through which the slider seat is clamped on the slide rail and limited in position with the slide rail; a positioning threaded hole for connecting with the standard inspection block is dug on the upper end surface of the slider seat;

[0008] The pressing plate is a sheet-like elliptical structure with through holes at both ends, through which screws are passed to fasten the pressing plate, thereby fastening the slide rail to the base;

[0009] The instrument fixing piece is a T-shaped structure, with circular through holes at the upper and lower ends. The through hole at the lower end cooperates with the end surface threaded hole on the base, and the instrument fixing piece is fixed to the base by bolts; the circular through hole at the upper end is connected to the measuring instrument and is used to fix the measuring instrument;

[0010] A through hole is designed at the bottom of the calibration block, and bolts are used to connect the calibration block and the slider seat through the through hole. The two constitute a calibration standard component assembly to achieve sliding adjustment of the measurement depth. The measuring instrument is operated to irradiate the laser projection point to the calibration block to obtain the depth measurement step difference and radius measurement step difference, and the above measurement results are compared with the standard values ​​to verify the calibration results.

[0011] The length of the base groove is greater than the protruding length of the slide rail and ensures the connection gap of the splicing structure.

[0012] The pressing plate is a metal structure, and its outer dimensions are consistent with the square through hole of the slide rail.

[0013] The slide rail is a triangular wedge-shaped structure, and the slider seat is a square structure. An internal through groove with the same triangular wedge-shaped shape as the slide rail is dug inside. The slide rail and the slider seat are matched and limited by the triangular wedge-shaped structure.

[0014] It also includes a connecting piece; threaded holes are dug near the edge of the front and rear ends of both sides of the base, the connecting piece passes through the square through hole of the slide rail, and is threadedly connected and fastened with the upper surface of the base by bolts to extend the base.

[0015] The connecting pieces are L-shaped structural metal pieces, which are respectively installed on the side planes of two adjacent groups of bases. The symmetrically installed connecting pieces are fastened by bolts and nuts to extend the bases.

[0016] The calibration block is designed as a multi-plane tree-shaped metal structure, and the reference planes are all designed to be vertical. The front and rear parts are designed as vertically parallel step planes A and B, and the upper and lower parts are designed as horizontally parallel step planes C and D, wherein the A-B and C-D plane distances are standard values. During calibration, the measuring instrument is controlled to adjust the laser projection point to the vertically parallel step planes A and B of the calibration block respectively, and the depth measurement results a and b are obtained, where a-b is the depth measurement step difference; the laser projection point is adjusted to the horizontally parallel step planes C and D of the calibration block respectively, and the depth measurement results c and d are obtained, where c-d is the radius measurement step difference. The measurement results are compared with the standard values ​​to verify the calibration results.

[0017] A method for calibrating a non-contact propellant size measuring instrument using the tool comprises:

[0018] Fix the drug size measuring instrument on the calibration tool through the through holes on both sides of the instrument fixing piece;

[0019] Operate the measuring instrument to adjust the laser projection point to the A and B step planes vertically parallel to the calibration block, and obtain depth measurement results a and b, where a-b is the depth measurement step difference; adjust the laser projection point to the C and D step planes horizontally parallel to the calibration block, and obtain depth measurement results c and d, where c-d is the radius measurement step difference. Compare the measurement results with the standard values ​​to verify the calibration results.

[0020] The advantages of the present invention compared with the prior art are:

[0021] 1. The present invention designs two sets of standard reference surfaces, and the measuring instrument measures the AB surface spacing of the vertical step structure and the CD surface spacing of the horizontal step structure. It satisfies the standard inspection work of the parameters in the two directions of depth and radius. The two spacing parameters can be measured using high-precision measuring instruments or handed over to the metrology verification department to issue an identification certificate to confirm the dimensional data. The transmission and conversion of standard inspection data to instrument measurement data is completed.

[0022] 2. The measuring instrument of the present invention adopts the basic technical method of laser ranging. Laser ranging has the characteristic that the accuracy decreases with the increase of measuring distance. The measuring depth corresponds to the measuring distance. The general measurement requirement is not less than 5 meters. The tool is designed with a splicing extension solution to avoid the difficulty of installation and transportation caused by the base being too large. At the same time, the splicing connection solution can effectively avoid the difficult problems of deformation of a single tooling and poor guide of the slide rail.

[0023] 3. The tool of the present invention is made of metal material, and the operator can directly set it up and verify it on site. At the same time, the tool is designed with connecting components, which is convenient for dismantling and displacement, and supports manual lifting and displacement, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of the base, where: Figure 2 a is a bottom view, Figure 2 b is the main view, Figure 2 c is the top view, Figure 2 d is the side view;

[0026] Figure 3 It is a schematic diagram of the structure of the slide rail, where: Figure 3 a is the main view, Figure 3 b is a side view;

[0027] Figure 4 It is a schematic diagram of the structure of the slider seat, where: Figure 4 a is the main view, Figure 4 b is the bottom view, Figure 4 c is a side view;

[0028] Figure 5 is a schematic diagram of the structure of the pressure plate, where: Figure 5 a Main view, Figure 5 b is a side view;

[0029] Figure 6 is a schematic diagram of the structure of the connector, where: Figure 6 a is the main view, Figure 6 b Top view, Figure 6 c is a side view;

[0030] Figure 7 It is a schematic diagram of the structure of the instrument fixing parts, where: Figure 7 a Main view, Figure 7 b is a side view;

[0031] Figure 8 It is a schematic diagram of the structure of the standard inspection block, where: Figure 8 a is the main view, Figure 8 b side view, Figure 8 c is a top view. DETAILED DESCRIPTION

[0032] like Figure 1 As shown, the present invention relates to a non-contact measuring instrument calibration tool, which comprises: a base 1, a slide rail 2, a slider seat 3, a pressing plate 4, a connecting piece 5, an instrument fixing piece 6, and a standard inspection block 7.

[0033] like Figure 2 As shown, the base is a metal structure with a square groove in the middle and multiple through holes at the bottom for installing an adjustable height bracket; a threaded hole for installing a pressure plate is dug on the top end surface;

[0034] like Figure 3 As shown, the slide rail is a trapezoidal structure, with a square protrusion designed at the bottom, and the protrusion cooperates with the groove of the base for positioning; a square through hole is dug on the slide rail protrusion for fixing and installing the pressure plate;

[0035] like Figure 4 As shown, the slider seat is a square structure with a groove designed inside, through which the slider seat is clamped on the slide rail and limited with the slide rail; a positioning threaded hole for connecting with the standard inspection block is dug on the upper end surface of the slider seat;

[0036] like Figure 5 As shown, the pressing plate is a sheet-like elliptical structure, with through holes designed at both ends, through which screws are passed to fasten the pressing plate, thereby fastening the slide rail to the base;

[0037] like Figure 7As shown, the instrument fixing piece is a T-shaped structure, with circular through holes at both the upper and lower ends. The through hole at the lower end cooperates with the end surface threaded hole on the base, and the instrument fixing piece is fixed to the base by bolts; the circular through hole at the upper end is connected to the measuring instrument and is used to fix the measuring instrument;

[0038] like Figure 8 As shown, a through hole is designed at the bottom of the calibration block, and bolts are used to connect the calibration block and the slider seat through the through hole. The two constitute a calibration standard component assembly to achieve sliding adjustment of the measurement depth. The measuring instrument is operated to irradiate the laser projection point to the calibration block to obtain the depth measurement step difference and radius measurement step difference, and the above measurement results are compared with the standard values ​​to verify the calibration results.

[0039] The length of the base groove is greater than the protruding length of the slide rail and ensures the connection gap of the splicing structure.

[0040] The pressing plate is a metal structure, and its outer dimensions are consistent with the square through hole of the slide rail.

[0041] The slide rail is a triangular wedge-shaped structure, and the slider seat is a square structure. An internal through groove with the same triangular wedge-shaped shape as the slide rail is dug inside. The slide rail and the slider seat are matched and limited by the triangular wedge-shaped structure.

[0042] like Figure 6 As shown, it also includes a connecting piece; threaded holes are dug near the edge of the front and rear ends of both sides of the base, and the connecting piece passes through the square through hole of the slide rail and is threadedly connected and fastened with the upper surface of the base by bolts to extend the base.

[0043] The connecting pieces are L-shaped structural metal pieces, which are respectively installed on the side planes of two adjacent groups of bases. The symmetrically installed connecting pieces are fastened by bolts and nuts to extend the bases.

[0044] The calibration block is designed as a multi-plane tree-shaped metal structure, and the reference planes are all designed to be vertical. The front and rear parts are designed as vertically parallel step planes A and B, and the upper and lower parts are designed as horizontally parallel step planes C and D, wherein the A-B and C-D plane distances are standard values. During calibration, the measuring instrument is controlled to adjust the laser projection point to the vertically parallel step planes A and B of the calibration block respectively, and the depth measurement results a and b are obtained, where a-b is the depth measurement step difference; the laser projection point is adjusted to the horizontally parallel step planes C and D of the calibration block respectively, and the depth measurement results c and d are obtained, where c-d is the radius measurement step difference. The measurement results are compared with the standard values ​​to verify the calibration results.

[0045] The present invention also relates to a method for calibrating a non-contact measuring instrument for propellant size using the tool, comprising:

[0046] Fix the drug size measuring instrument on the calibration tool through the through holes on both sides of the instrument fixing piece;

[0047] Operate the measuring instrument to adjust the laser projection point to the A and B step planes vertically parallel to the calibration block, and obtain depth measurement results a and b, where a-b is the depth measurement step difference; adjust the laser projection point to the C and D step planes horizontally parallel to the calibration block, and obtain depth measurement results c and d, where c-d is the radius measurement step difference. Compare the measurement results with the standard values ​​to verify the calibration results.

[0048] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A calibration tool for a non-contact propellant size measuring instrument, characterized in that: include: Base, slide rail, slider seat, pressure plate, instrument fixings, standard inspection block; The base is a metal structure with a square groove in the middle and multiple through holes at the bottom for installing the height-adjustable bracket. The top end surface has threaded holes for installing the pressure plate. The slide rail is a trapezoidal structure, with a square protrusion designed at the bottom, and the protrusion cooperates with the groove of the base for positioning; a square through hole is dug on the slide rail protrusion for fixing and installing the pressure plate; The slider seat is a square structure with a groove designed inside, through which the slider seat is clamped on the slide rail and limited in position with the slide rail; a positioning threaded hole for connecting with the standard inspection block is dug on the upper end surface of the slider seat; The pressing plate is a sheet-like elliptical structure with through holes at both ends, through which screws are passed to fasten the pressing plate, thereby fastening the slide rail to the base; The instrument fixing piece is a T-shaped structure, with circular through holes at the upper and lower ends. The through hole at the lower end cooperates with the end surface threaded hole on the base, and the instrument fixing piece is fixed to the base by bolts; the circular through hole at the upper end is connected to the measuring instrument and is used to fix the measuring instrument; A through hole is designed at the bottom of the calibration block, and bolts are used to connect the calibration block and the slider seat through the through hole. The two constitute a calibration standard component assembly to achieve sliding adjustment of the measurement depth. The measuring instrument is operated to irradiate the laser projection point to the calibration block to obtain the depth measurement step difference and radius measurement step difference, and the above measurement results are compared with the standard values ​​to verify the calibration results.

2. A calibration tool for a non-contact propellant size measuring instrument according to claim 1, characterized in that: The length of the base groove is greater than the protruding length of the slide rail and ensures the connection gap of the splicing structure.

3. A calibration tool for a non-contact propellant size measuring instrument according to claim 1, characterized in that: The pressing plate is a metal structure, and its outer dimensions are consistent with the square through hole of the slide rail.

4. A calibration tool for a non-contact propellant size measuring instrument according to claim 1, characterized in that: The slide rail is a triangular wedge-shaped structure, and the slider seat is a square structure. An internal through groove with the same triangular wedge-shaped shape as the slide rail is dug inside. The slide rail and the slider seat are matched and limited by the triangular wedge-shaped structure.

5. A calibration tool for a non-contact propellant size measuring instrument according to claim 1, characterized in that: It also includes a connecting piece; threaded holes are dug near the edge of the front and rear ends of both sides of the base, the connecting piece passes through the square through hole of the slide rail, and is threadedly connected and fastened with the upper surface of the base by bolts to extend the base.

6. A calibration tool for a non-contact propellant size measuring instrument according to claim 5, characterized in that: The connecting pieces are L-shaped structural metal pieces, which are respectively installed on the side planes of two adjacent groups of bases. The symmetrically installed connecting pieces are fastened by bolts and nuts to extend the bases.

7. A calibration tool for a non-contact propellant size measuring instrument according to claim 1, characterized in that: The calibration block is designed as a multi-plane tree-shaped metal structure, and the reference planes are all designed to be vertical. The front and rear parts are designed as vertically parallel step planes A and B, and the upper and lower parts are designed as horizontally parallel step planes C and D, wherein the A-B and C-D plane distances are standard values. During calibration, the measuring instrument is controlled to adjust the laser projection point to the vertically parallel step planes A and B of the calibration block respectively, and the depth measurement results a and b are obtained, where a-b is the depth measurement step difference; the laser projection point is adjusted to the horizontally parallel step planes C and D of the calibration block respectively, and the depth measurement results c and d are obtained, where c-d is the radius measurement step difference. The measurement results are compared with the standard values ​​to verify the calibration results.

8. A method for calibrating a non-contact propellant size measuring instrument using the tool of claim 7, characterized in that: include: Fix the drug size measuring instrument on the calibration tool through the through holes on both sides of the instrument fixing piece; Operate the measuring instrument to adjust the laser projection point to the A and B step planes vertically parallel to the calibration block, and obtain depth measurement results a and b, where a-b is the depth measurement step difference; adjust the laser projection point to the C and D step planes horizontally parallel to the calibration block, and obtain depth measurement results c and d, where c-d is the radius measurement step difference. Compare the measurement results with the standard values ​​to verify the calibration results.

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