Digital multimeter automatic positioning device for installing digital multimeter intelligent calibration system

Abstract

The utility model discloses a digital multimeter automatic positioning device used for installing a digital multimeter intelligent calibration system, comprising a vertical positioning assembly and a transverse positioning assembly which are configured to be of an openable structure and respectively clamp a digital multimeter from the length direction and the width direction of the digital multimeter; wherein the vertical positioning assembly comprises a positioning plate and a limiting plate, the positioning plate is fixedly installed on an operation table of the digital multimeter intelligent detection system, the limiting plate is configured to move in the length direction of the digital multimeter, and when the vertical positioning assembly is used, a gap for the digital multimeter to rotate right is reserved between the limiting plate and the top of the digital multimeter. The automatic positioning device can solve the positioning problem of the digital multimeter metering intelligent detection device during detection and placement through clamping in the front, back, left and right directions, can adjust the posture of the digital multimeter in the left and right clamping process, can automatically guide the digital multimeter, and is suitable for digital multimeters of different models.

Description

TECHNICAL FIELD

[0001] The utility model relates to digital multimeter calibration technical field, concretely relates to a kind of digital multimeter automatic positioning device for digital multimeter intelligent calibration system installation. BACKGROUND

[0002] The common method for digital multimeter calibration at present is manual calibration, i.e. professional personnel calibrate each index of digital multimeter according to standard procedure one by one. Although this method is simple and intuitive, it is inefficient and prone to errors when facing a large number of calibration tasks.

[0003] In CN116359816A, a digital multimeter automatic calibration device and method are proposed. The method realizes automatic calibration of digital multimeter through multi-functional calibration source, robot grabbing component and other automatic equipment. Specifically, the digital multimeter to be tested is positioned on the digital multimeter positioning unit, then the test lead head is inserted into the connection port of the digital multimeter to be tested through the robot grabbing component, the knob of the digital multimeter to be tested is rotated to the specified range parameter, the multi-functional calibration source provides preset electrical parameter value, the robot takes a photo of the digital multimeter dial to obtain reading information, and the deviation of the digital multimeter is calibrated based on the reading information.

[0004] The structure of the digital multimeter positioning unit is not disclosed in the above patent application. Currently, the positioning of digital multimeters is mostly based on the side of the digital multimeter, which cannot well solve the problems of accurate positioning and consistency of positioning for digital multimeters of the same type. UTILITY MODEL CONTENT

[0005] To solve the above problems, the utility model provides a digital multimeter automatic positioning device for digital multimeter intelligent calibration system installation. The device can solve the positioning problem of digital multimeter measurement intelligent detection device during detection and placement by clamping in four directions (front, back, left and right). The posture of the digital multimeter can be adjusted during left and right clamping to automatically align, which is suitable for digital multimeters of different types.

[0006] Specifically, the utility model is implemented as follows:

[0007] A digital multimeter automatic positioning device for digital multimeter intelligent calibration system installation includes:

[0008] A vertical positioning component is arranged along the length direction of the digital multimeter and configured as a openable and closable structure to limit the movement of the digital multimeter in its length direction.

[0009] A horizontal positioning component is arranged along the length direction of the digital multimeter and configured as a openable and closable structure to clamp the digital multimeter in its width direction.

[0010] The vertical positioning assembly comprises:

[0011] A positioning plate is fixedly installed on the operation table of the digital multimeter intelligent detection system.

[0012] A limiting plate is configured to move along the length direction of the digital multimeter, and a gap is left between the limiting plate and the top of the digital multimeter for the digital multimeter to rotate to the correct position.

[0013] Further, the horizontal positioning assembly comprises:

[0014] A first positioning unit corresponds to the lower part of the digital multimeter and is configured to open and close in the width direction of the digital multimeter.

[0015] A second positioning unit corresponds to the upper part of the digital multimeter and is configured to open and close in the width direction of the digital multimeter.

[0016] The first positioning unit and the second positioning unit act in sequence to guide and fix the digital multimeter.

[0017] Further, the first positioning unit and the second positioning unit are the same in structure and each comprises:

[0018] Two positioning columns are arranged on both sides of the digital multimeter.

[0019] A positioning driving member is connected with the two positioning columns and is used to drive the two positioning columns to open and close.

[0020] Further, the output end of the positioning driving member is connected with a reversible screw rod, and the two positioning columns are arranged at both ends of the reversible screw rod.

[0021] Further, the positioning column comprises:

[0022] An installation shaft is connected with the reversible screw rod through a base.

[0023] A positioning sleeve is assembled on the installation shaft through a bearing so that the positioning sleeve rotates around its axis.

[0024] Further, the vertical positioning assembly further comprises:

[0025] A limiting plate driving member is connected with the limiting plate and is used to drive the limiting plate to move along the length direction of the digital multimeter.

[0026] The working principle of the utility model:

[0027] In the calibration detection process, the digital multimeter 6 is placed on the cover plate 33 of the operation table 1, then the limiting plate driving element 313 drives the limiting plate 312 to move to the direction of the positioning plate 311, pushes the digital multimeter 6 to the positioning plate 311, and then the limiting plate 312 slightly retreats to leave a digital multimeter 6 guide clearance. Then the positioning driving element 322 drives the two positioning columns 321 of the first positioning unit to converge along the width direction of the digital multimeter 6, and then drives the two positioning columns 321 of the second positioning unit to converge along the width direction of the digital multimeter 6, and in the converging process of the first positioning unit and the second positioning unit, the positioning column 321 first contacting the digital multimeter 6 pushes it to move to the opposite positioning column 321, at the same time, the inclined digital multimeter 6 is rotated and gradually guided, and finally is slightly clamped by the first positioning unit and the second positioning unit, and finally the limiting plate 312 moves to the direction of the positioning plate 311 to clamp the digital multimeter 6 from the length direction of the digital multimeter 6, and the first positioning unit and the second positioning unit clamp the digital multimeter 6 from the width direction of the digital multimeter 6.

[0028] Compared with the prior art, the utility model has the advantages of:

[0029] (1) The automatic positioning device can adapt to digital multimeters of different models, reduces calibration failure or calibration error caused by model difference, improves calibration efficiency, and can better cope with calibration work of a large number of digital multimeters.

[0030] (2) In the positioning process, the first positioning unit and the second positioning unit act in turn, can automatically guide the inclined digital multimeter, and improve the positioning accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is whole structure schematic diagram of embodiment of the utility model;

[0032] Figure 2 It is automatic positioning device structure schematic diagram of embodiment of the utility model;

[0033] Figure 3 It is cover plate structure schematic diagram of embodiment of the utility model;

[0034] Figure 4 It is transverse positioning assembly structure schematic diagram of embodiment of the utility model;

[0035] Figure 5 It is vertical positioning assembly structure schematic diagram of embodiment of the utility model;

[0036] Figure 6 It is automatic positioning device plan view of embodiment of the utility model;

[0037] Figure 7 The automatic positioning device working state schematic view is described in the embodiment of the utility model;

[0038] Figure 8 For Figure 7 The B part of the enlargement view in the middle;

[0039] Figure 9 The mechanical arm structure schematic view is described in the embodiment of the utility model;

[0040] Figure 10 The V-shaped clamping jaw presses the digital multimeter button schematic view is described in the embodiment of the utility model;

[0041] Figure 11 The V-shaped clamping jaw rotates the digital multimeter knob schematic view is described in the embodiment of the utility model;

[0042] Figure 12 The V-shaped clamping jaw pulls out the detection plug schematic view is described in the embodiment of the utility model;

[0043] Figure 13 The mechanical arm end head structure schematic view is described in the embodiment of the utility model;

[0044] Figure 14 The mechanical arm end head structure cross-sectional view is described in the embodiment of the utility model;

[0045] Figure 15 The clamping plate structure schematic view is described in the embodiment of the utility model;

[0046] Figure 16 The press rod presses the digital multimeter button schematic view is described in the embodiment of the utility model;

[0047] Figure 17 The detection line structure schematic view is described in the embodiment of the utility model;

[0048] Figure 18 The detection plug structure schematic view is described in the embodiment of the utility model;

[0049] Figure 19 The detection socket structure schematic view is described in the embodiment of the utility model;

[0050] Figure 20 The temporary socket structure schematic view is described in the embodiment of the utility model;

[0051] Figure 21 The detection line is inserted into the detection socket and the temporary socket state schematic view is described in the embodiment of the utility model;

[0052] Reference signs:

[0053] 1 - operation platform, 11 - table top, 12 - cabinet body, 13 - universal wheel, 14 - ventilation opening, 15 - wire hole;

[0054] 2 - measurement standard equipment;

[0055] 3 - automatic positioning device, 31 - vertical positioning assembly, 311 - positioning plate, 312 - limiting plate, 313 - limiting plate driving piece, 32 - horizontal positioning assembly, 321 - positioning column, 3211 - mounting shaft, 3212 - positioning sleeve, 322 - positioning driving piece, 323 - positive and negative toothed rod, 33 - cover plate;

[0056] 4 - collaborative robot, 41 - mechanical arm, 411 - vision equipment, 412 - V-shaped clamping jaw, 4121 - clamping plate, 4122 - V-shaped protrusion, 413 - pressing rod, 42 - control cabinet;

[0057] 5 - test line conversion connecting device, 51 - detection line, 52 - detection plug, 521 - V-shaped groove, 53 - detection socket, 531 - detection jack, 54 - temporary socket, 541 - temporary jack, 55 - guide block, 551 - guide angle;

[0058] 6 - digital multimeter. DETAILED DESCRIPTION

[0059] The utility model will be further explained in detail by specific embodiments in combination with the drawings.

[0060] Embodiment 1

[0061] As Figures 1-21 shown, the utility model embodiment is as follows:

[0062] A handheld digital multimeter intelligent detection system, including operation platform 1, measurement standard equipment 2, automatic positioning device 3, collaborative robot 4, test line conversion connecting device 5 and computer.

[0063] Operation platform 1, including table top 11 and cabinet body 12;Cabinet body 12 bottom four corners are provided with the universal wheel 13 of height adjusting support respectively, when operation platform 1 is moved to the preset position, through the height of height adjusting support is lowered and contacts ground, after supporting operation platform 1, make universal wheel 13 get off the ground, and the operation platform 1 is positioned.Cabinet body 12 side is provided with ventilation opening 14 and wire hole, and the equipment power supply line in the cabinet body 12 is connected with external power supply through wire hole 15.

[0064] The collaborative robot 4 comprises a control cabinet 42 and a mechanical arm 41, the mechanical arm 41 is arranged to be installed on the table top 11, the control cabinet 42 is arranged to be installed inside the cabinet body 12, and the mechanical arm 41 is controlled to move through the control cabinet 42. The mechanical arm 41 realizes basic space movement by six joints. The end of the mechanical arm 41 is provided with a vertically downward V-shaped clamping jaw 412 and an obliquely downward cylindrical pressing rod 413. The V-shaped clamping jaw 412 is composed of two clamping plates 4121, the clamping plates 4121 are arranged to be perpendicular to the table top 11 of the operation table 1, and the opposite surfaces of the two clamping plates 4121 are provided with V-shaped protrusions 4122. The V-shaped clamping jaw 412 is used to pull and plug the plug and adjust the knob of the digital multimeter 6 to be tested; the pressing rod 413 or the V-shaped clamping jaw 412 can press the keys on the digital multimeter 6 to be tested through the movement of the mechanical arm 41; the vision equipment 411 is also arranged and installed on the mechanical arm 41, which is used to collect the readings of the digital multimeter 6 to be tested; the vision equipment 411 adopts a 2.5D high-resolution industrial camera, and is provided with a special LED light source module for illuminating the collection area of the vision equipment 411. The vision equipment 411 can accurately identify the scene height and inclination change, the space compensation accuracy is ±0.26mm, and is equipped with a comprehensive error detection algorithm to quickly realize visual positioning, measurement, detection, identification and other visual applications. The readings of the digital multimeter 6 to be tested are collected through the installation at the end of the mechanical arm 41.

[0065] The metrological standard device 2, also known as a multifunctional calibration source, is arranged and installed inside the cabinet body 12, and is used to provide a measurement signal.

[0066] The automatic positioning device 3 is arranged and installed on the table top 11 of the operation table 1, and is used to position the digital multimeter 6 to be tested. The automatic positioning device 3 comprises a vertical positioning assembly 31 and a horizontal positioning assembly 32; the table top 11 is provided with a cover plate 33, the horizontal positioning assembly 32 and the vertical positioning assembly 31 are located at the cover plate 33, and the cover plate 33 is provided with a waist-shaped hole, and the waist-shaped hole is used to pass through the components of the vertical positioning assembly 31 and the horizontal positioning assembly 32.

[0067] The vertical positioning assembly 31 is arranged along the length direction of the digital multimeter 6 to be tested and is configured as an openable and closable structure for limiting the movement of the digital multimeter 6 to be tested in the length direction. The vertical positioning assembly 31 comprises a positioning plate 311, a limiting plate 312 and a limiting plate driving member 313 connected with the limiting plate 312 for driving the limiting plate 312 to move along the length direction of the digital multimeter 6 to be tested. The positioning plate 311 is fixedly installed on the table top 11. The limiting plate 312 is movable along the length direction of the digital multimeter 6 to be tested. In use, the limiting plate 312 leaves a gap with the top of the digital multimeter 6 to be tested for the digital multimeter 6 to be tested to be turned to be right. The horizontal positioning assembly 32 is arranged along the width direction of the digital multimeter 6 to be tested and is configured as an openable and closable structure for clamping the digital multimeter 6 to be tested in the width direction. The horizontal positioning assembly 32 comprises a first positioning unit and a second positioning unit. The first positioning unit corresponds to the lower part of the digital multimeter 6 to be tested and is configured to be opened and closed in the width direction of the digital multimeter 6 to be tested. The second positioning unit corresponds to the upper part of the digital multimeter 6 to be tested and is configured to be opened and closed in the width direction of the digital multimeter 6 to be tested. The first positioning unit and the second positioning unit act in sequence to guide and fix the digital multimeter 6 to be tested. The first positioning unit and the second positioning unit are the same in structure and each comprises a positioning column 321 and a positioning driving member 322. The positioning column 321 is provided with two positioning columns and is located at the two sides of the digital multimeter 6 to be tested respectively. The positioning column 321 penetrates through the waist-shaped hole of the cover plate 33. The positioning driving member 322 is located below the cover plate 33 and is connected with the two positioning columns 321 for driving the two positioning columns 321 to be opened and closed. The output end of the positioning driving member 322 is connected with a reversible screw rod 323. The two positioning columns 321 are arranged at the two ends of the reversible screw rod 323 respectively. The positioning column 321 comprises a mounting shaft 3211 and a positioning sleeve 3212. The mounting shaft 3211 is connected with the reversible screw rod 323 through a base. The positioning sleeve 3212 is assembled on the mounting shaft 3211 through a bearing so that the positioning sleeve 3212 rotates around its axis.

[0068] The test line conversion connecting device 5 comprises a test line 51, a test socket 53 and a temporary socket 54; the test socket 53 and the temporary socket 54 are arranged to be installed on the table top 11, the temporary socket 54 is installed at the middle position of the automatic positioning device 3, and the temporary socket 54 is provided with a plurality of temporary sockets 541 for storing the test plugs 52 at one end of the detection holes of the digital multimeter 6 under test in a non-working state. The test socket 53 is installed in connection with the measurement standard equipment 2, and the test line 51 is used to connect the test socket 53 and the digital multimeter 6 under test; the test line 51 is provided with test plugs 52 at both ends, the test plugs 52 are arranged as banana heads, and the upper end of the test plug 52 is provided with a V-shaped groove 521 used in cooperation with the V-shaped jaw 412, the V-shaped lug 4122 is clamped with the V-shaped groove 521 to realize stable clamping. The test line 51 comprises a first test line 51 and a second test line 51; the test socket 53 is provided with a plurality of test sockets 531 matched with the test plugs 52; during detection, the test plug 52 at one end of the test line 51 is inserted into the test socket 53, and the test plug 52 at the other end is inserted into the detection hole of the digital multimeter 6 under test, which is used to transmit the measurement signal from the test socket 53 to the digital multimeter 6 under test. The test plugs 52 of the first test line 51 and the second test line 51 are arranged at different heights to adapt to the digital multimeter 6 under test with narrow detection hole spacing, so as to prevent clamping failure when pulling out the plug. The V-shaped grooves 521 of the test plugs 52 of the first test line 51 and the second test line 51 are arranged at different heights, and the position of the V-shaped groove 521 on the test plug 52 with high height is higher than the top of the test plug 52 with low height, which is convenient for the V-shaped jaw 412 to clamp. The test socket 53 and the temporary socket 54 are provided with a plurality of guide blocks 55, the upper end of the guide block 55 is provided with a guide angle 551, which is used to improve the accuracy when the test plug 52 is inserted into the test socket 531.

[0069] The computer comprises a host, an operating device and a display, the host is placed in the cabinet 12 and is connected with the measurement standard equipment 2, the automatic positioning device 3 and the control cabinet 42 respectively; the display and the operating device are arranged to be installed on the operating table 1.

[0070] In the calibration detection process, first, the tester places the digital multimeter 6 on the cover plate 33 of the automatic positioning device 3, so that the upper and lower ends are roughly aligned with the limiting plate 312 and the positioning plate 311 respectively; then the limiting plate driving member 313 drives the limiting plate 312 to move towards the positioning plate 311, pushing the digital multimeter 6 onto the positioning plate 311, and then the limiting plate 312 slightly retreats, leaving a digital multimeter 6 guide gap. Then the positioning driving member 322 drives the two positioning columns 321 of the first positioning unit to converge along the width direction of the digital multimeter 6, and then drives the two positioning columns 321 of the second positioning unit to converge along the width direction of the digital multimeter 6. During the convergence of the first positioning unit and the second positioning unit, the positioning column 321 that first contacts the digital multimeter 6 pushes it to move towards the opposite positioning column 321, and at the same time, the inclined digital multimeter 6 rotates and gradually guides, and is finally slightly clamped by the first positioning unit and the second positioning unit. Finally, the limiting plate 312 moves towards the positioning plate 311 to clamp the digital multimeter 6 from the length direction, and the first positioning unit and the second positioning unit clamp the digital multimeter 6 from the width direction. In the initial state, one end of the detection line 51 is inserted into the detection socket 53, and the other end is inserted into the temporary socket 54; after the digital multimeter 6 is positioned, the detection plug 52 is pulled out of the temporary socket 541 and inserted into the digital multimeter 6 socket by the mechanical arm 41, and the digital multimeter 6 is connected to the measurement standard equipment 2 through the detection socket 53 and the detection line 51. Then the mechanical arm 41 controls the V-shaped clamp jaw 412 to rotate the rotary button on the digital multimeter 6 or press the digital multimeter 6 key to adjust it to the item to be measured. When clamping, first clamp the lower detection plug 52 into the digital multimeter 6, and then clamp the higher detection plug 52 into the digital multimeter 6. Finally, the visual equipment 411 collects the digital multimeter 6 reading, and the light source is turned on to illuminate the digital multimeter 6 reading area for visual collection.

[0071] The above application of specific examples to the utility model is described, which is only used to help understand the utility model, and does not limit the utility model. For those skilled in the art to which the utility model belongs, according to the idea of the utility model, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A digital multimeter automatic positioning device for digital multimeter intelligent calibration system deployment, characterized in that, The utility model relates to a digital multimeter intelligent detection system, which comprises a vertical positioning assembly (31) arranged along the length direction of a digital multimeter (6) and configured as an openable and closable structure for limiting the movement of the digital multimeter (6) in the length direction thereof, and a transverse positioning assembly (32) arranged along the length direction of the digital multimeter (6) and configured as an openable and closable structure for clamping the digital multimeter (6) in the width direction thereof. The vertical positioning assembly (31) comprises a positioning plate (311) fixedly installed on an operating table (1) of the digital multimeter intelligent detection system and a limiting plate (312) configured to move along the length direction of the digital multimeter (6) and leaving a gap for the digital multimeter (6) to be turned to the right position when in use. The transverse positioning assembly (32) comprises a first positioning unit corresponding to the lower part of the digital multimeter (6) and configured to open and close in the width direction of the digital multimeter (6), and a second positioning unit corresponding to the upper part of the digital multimeter (6) and configured to open and close in the width direction of the digital multimeter (6). The first positioning unit and the second positioning unit act in sequence to guide and clamp the digital multimeter (6) after the digital multimeter (6) is turned to the right position. The first positioning unit and the second positioning unit are structurally identical and each comprises a positioning column (321) provided with two positioning columns and located on both sides of the digital multimeter (6), respectively, and a positioning driving member (322) connected with the two positioning columns (321) and used for driving the two positioning columns (321) to open and close. The output end of the positioning driving member (322) is connected with a reversible toothed rod (323), and the two positioning columns (321) are arranged at both ends of the reversible toothed rod (323), respectively.

2. The digital multimeter automatic positioning device for digital multimeter intelligent calibration system installation of claim 1, wherein, The positioning column (321) comprises a mounting shaft (3211) connected with the reversible toothed rod (323) through a base and a positioning sleeve (3212) assembled on the mounting shaft (3211) through a bearing so that the positioning sleeve (3212) rotates around its axis. The vertical positioning assembly (31) further comprises a limiting plate driving member (313) connected with the limiting plate (312) and used for driving the limiting plate (312) to move along the length direction of the digital multimeter (6). ​ ​ 3. The digital multimeter auto positioning device for digital multimeter intelligent calibration system installation of claim 2, wherein, ​ ​ ​ 4. The digital multimeter auto positioning device for digital multimeter intelligent calibration system installation of claim 3, wherein, ​ 5. The digital multimeter auto positioning device for digital multimeter intelligent calibration system installation of claim 4, wherein, ​ ​ ​ 6. The digital multimeter auto positioning device for digital multimeter intelligent calibration system installation of claim 1, wherein, ​ ​

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