Special assembly for test connecting line of intelligent calibration system device of digital multimeter

Abstract

The utility model relates to a special assembly for a test connecting line of an intelligent calibration system device of a digital multimeter. The special assembly comprises a detection line, a detection socket, a detection plug and a V-shaped clamping jaw, the detection plug is a banana head, and the upper end of the detection plug is provided with a V-shaped groove. The detection line comprises a first detection line and a second detection line, two ends of the first detection line and the second detection line are provided with detection plugs, the detection plug at one end is inserted into the detection socket during detection, and the detection plug at the other end is inserted into the detection hole of the digital multimeter to be detected; the opposite faces of the V-shaped clamping jaws are provided with V-shaped protruding blocks matched with the V-shaped grooves of the detection plugs, the upper ends of the V-shaped clamping jaws are provided with V-shaped grooves, the V-shaped grooves and the V-shaped protruding blocks of the V-shaped clamping jaws form a clamping structure, the detection plugs are prevented from sliding off in the grabbing process, the positions of the V-shaped grooves in the detection plugs are arranged to be higher than the tops of the low detection plugs, and grabbing of the V-shaped clamping jaws is facilitated. And the detection socket is connected with the measurement standard equipment to transmit measurement signals, so that the digital multimeters of various models can be detected.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for handheld digital multimeters, and more specifically to a dedicated assembly for the test connection cable of a digital multimeter intelligent calibration system device. Background Technology

[0002] A digital multimeter, commonly known as a digital multimeter, is a general-purpose instrument for measuring electrical parameters in the field. It is widely used in electrical measurement instruments across various industries. Digital multimeters are also extensively used in railway rolling stock, locomotive, engineering, electrical, and vehicle manufacturing sectors. From simple electromechanical equipment testing and maintenance to complex applications in power supply systems, communications, and signaling departments, it is an essential tool in railway inspection work. Digital multimeters play a crucial role in measuring basic electrical parameters and are the most fundamental and important instruments for ensuring the safe operation of railways. As a vital measuring tool in railway maintenance and inspection work, the accuracy of the multimeter directly affects the quality and safety of railway inspection work. Therefore, it is managed as a measuring instrument and requires regular calibration to ensure its accuracy and reliability. According to specifications, digital multimeters must be calibrated for five parameters: DC voltage, DC current, AC voltage, AC current, and resistance. Each calibration parameter requires calibration of each range. During calibration, the number of calibration points ranges from dozens to hundreds, with some high-precision digital multimeters requiring thousands. With technological advancements, more and more companies are adopting robotic automation to improve production efficiency and reduce human error. However, in the automated calibration and testing of digital multimeters, automatically gripping and inserting test cables into the multimeter's jacks is a technical challenge. Existing gripper designs often exhibit instability during the cable gripping process.

[0003] Because digital multimeters come in many models, the location, layout, and number of connection jacks vary. Furthermore, some digital multimeters cannot connect multiple sets of jacks simultaneously; only one set can be connected at a time, otherwise the multimeter will alarm and fail to calibrate. Additionally, the jack spacing on digital multimeters used for calibration is small, and the test lead tips are cylindrical with a slight bevel, increasing the difficulty of gripper control. Using the device described in this patented technology, displacement of the test lead tips can easily occur, leading to connection failure or even damage to the connector; further resulting in inaccurate calibration test data.

[0004] To address the problems existing in the current technology, it is necessary to develop a new type of clamp and matching test leads to improve the efficiency and reliability of automated calibration and testing of digital multimeters, reduce the risk of test lead damage and equipment failure due to improper operation, and thus provide more accurate and stable measurement results. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a dedicated assembly for the test connection cable of a digital multimeter intelligent calibration system device. It achieves stable gripping by cooperating the test plug and V-shaped clamps. A test socket is installed on the operating table to connect with metrological standard equipment, transmit measurement signals, and enable testing of various models of digital multimeters.

[0006] Specifically, this utility model provides a dedicated assembly for the test connection line of a digital multimeter intelligent calibration system device, including: a first test line, a second test line, a test socket, a test plug, and V-shaped clamps;

[0007] The detection plug is configured as a banana head, and a V-shaped groove is provided at the upper end of the detection plug;

[0008] The detection line includes a first detection line and a second detection line. Both ends of the first detection line and the second detection line are provided with detection plugs. During detection, the detection plug at one end is inserted into the detection socket, and the detection plug at the other end is inserted into the detection hole of the digital multimeter under test, so as to transmit the measurement signal from the detection socket to the digital multimeter under test.

[0009] The V-shaped gripper has V-shaped protrusions on its opposite side that match the V-shaped groove of the detection plug, to prevent the detection plug from slipping off during the gripping process;

[0010] The detection socket is installed on the workbench surface and connected to the metrological standard equipment for transmitting measurement signals.

[0011] Furthermore, the detection plugs of the first and second detection lines are set at different heights to accommodate the detection holes of the digital multimeter under test with different spacing.

[0012] Furthermore, the V-grooves on the detection plugs of the first and second detection lines are located at different heights, with the V-grooves on the higher detection plug positioned higher than the top of the lower detection plug; this facilitates gripping by the V-shaped grippers.

[0013] Furthermore, the V-shaped gripper consists of two clamping plates, which are set to be perpendicular to the operating table surface. The opposing surfaces of the two clamping plates are provided with V-shaped protrusions that match the V-shaped grooves at the upper end of the detection plug. When gripping, the V-shaped protrusions engage with the V-shaped grooves to achieve stable gripping.

[0014] Furthermore, the testing socket is provided with multiple testing holes that match the testing plug, and the testing holes are connected to the metrological standard equipment.

[0015] Furthermore, it also includes a temporary socket installed on the automatic positioning device. The temporary socket is provided with multiple temporary sockets for storing the test plugs of the first and second test lines inserted into the test holes of the digital multimeter under test when not in operation.

[0016] Furthermore, it also includes collaborative robots used to manipulate V-shaped grippers to automatically grasp, insert, remove, and calibrate the test plugs.

[0017] Furthermore, the detection socket and temporary socket are provided with multiple guide blocks, and the upper end of the guide blocks is provided with a chamfer to improve the accuracy of the detection plug being inserted into the detection socket.

[0018] Working Principle: When the dedicated assembly of the test connection line of the intelligent calibration system for digital multimeters is in operation, firstly, the digital multimeter 6 is placed on the automatic positioning device 3, pushed onto the positioning plate 311 and clamped, thus adjusting the digital multimeter 6 to the preset vertical position. Initially, one end of the test plug 52 of the test line 51 is inserted into the test socket 53, and the other end is inserted into the temporary socket 54. After the digital multimeter 6 is positioned, the robotic arm 41 pulls the test plug 52 out of the temporary socket 541 and inserts it into the digital multimeter 6's socket, connecting the digital multimeter 6 to the metrological standard device 2 through the test socket 53 and the test line 51. Then, the robotic arm 41 controls the V-shaped gripper 412 to rotate the rotary button on the digital multimeter 6 or press the button on the digital multimeter 6 to adjust it to the item to be measured. Finally, the reading of the digital multimeter 6 is acquired through the vision device 411. The light source is used to illuminate the reading area of ​​the digital multimeter 6 for easy visual acquisition. The V-shaped protrusion 4122 matches the V-shaped groove 521, enabling the V-shaped gripper 412 to stably grasp the inspection plug 52 and prevent the inspection plug from slipping. The inspection plugs 52 of the first inspection line 51 and the second inspection line 51 are set at different heights, and the V-shaped grooves 521 of the inspection plugs 52 of the first inspection line 51 and the second inspection line 51 are located at different heights. The V-shaped groove 521 on the higher inspection plug 52 is higher than the top of the lower inspection plug 52. When the sockets on the digital multimeter 6 are close together, the two inserted inspection plugs 52 will be too close. The different heights of the inspection plugs 52 ensure that the V-shaped gripper 412 can accurately grasp the one with the higher position first, and then grasp the other, improving the gripping accuracy.

[0019] Beneficial effects:

[0020] 1. The detection plug of this utility model is designed as a banana head with a V-shaped groove at the upper end, which forms a stable engagement structure with the V-shaped protrusion of the V-shaped gripper. This effectively prevents slippage or detachment during gripping and insertion, thereby ensuring the stability of the connection and the continuity of the test.

[0021] 2. The detection plugs of the first and second detection lines of this utility model are set at different heights to accommodate the detection holes of digital multimeters with different spacing.

[0022] 3. By setting the position of the V-groove on the detection plug to be higher than the top of the detection plug with a lower height, this utility model can effectively avoid the operational difficulties caused by the close spacing of the plug holes, facilitate the gripping of the V-shaped claw, and improve work efficiency and measurement accuracy.

[0023] 4. The temporary socket of this utility model provides space for storing the test plug when not in use, reducing the potential risks caused by the plug being exposed, helping to protect the test plug from damage, and keeping the work area clean.

[0024] 5. The detection socket and temporary socket of this utility model are provided with guide blocks and chamfers. The guide blocks can guide the detection plug to be inserted into the detection socket more accurately, improving the insertion accuracy. The chamfers can make the detection plug easier to align when it approaches the socket, thereby reducing the risk of insertion failure or damage due to misalignment. This not only improves the operating efficiency, but also extends the service life of the equipment. Attached Figure Description

[0025] Figure 1 Schematic diagram of the installation location of the dedicated assembly for the test connection cable of the intelligent calibration system device for digital multimeters;

[0026] Figure 2 A schematic diagram of the working status of the V-shaped jaw plug-in / plug detection plug of the test connection line assembly for the intelligent calibration system device of digital multimeter;

[0027] Figure 3 A schematic diagram of the V-shaped gripper structure of the robotic arm for the test connection line assembly of the intelligent calibration system device for digital multimeters;

[0028] Figure 4 Schematic diagram of the dedicated assembly clamping plate structure for the test connection line of the intelligent calibration system device for digital multimeters;

[0029] Figure 5 A schematic diagram of the test connection line assembly for a digital multimeter intelligent calibration system device;

[0030] Figure 6 A schematic diagram of the test connector structure for the dedicated assembly of test connection lines for a digital multimeter intelligent calibration system device;

[0031] Figure 7 A schematic diagram of the test socket structure for the dedicated assembly of test connection lines for a digital multimeter intelligent calibration system device;

[0032] Figure 8A schematic diagram of a temporary socket for a dedicated assembly of test connection lines for a digital multimeter intelligent calibration system device;

[0033] Figure 9 A schematic diagram showing the status of the test cable insertion into the test socket and temporary socket of the dedicated assembly for the test connection cable of the intelligent calibration system device for digital multimeters;

[0034] Numbering in the diagram: 1—Operating table, 2—Metrological standard equipment, 3—Automatic positioning device, 6—Digital multimeter, 7—Computer, 11—Tabletop, 12—Cabinet, 13—Cassette casters, 14—Ventilation opening, 15—Cable hole;

[0035] 4—Collaborative robot, 41—Robotic arm, 411—Vision device, 412—V-shaped gripper, 4121—Clamping plate, 4122—V-shaped protrusion, 413—Actuating lever, 42—Control cabinet;

[0036] 5—Special assembly for test connection lines of digital multimeter intelligent calibration system device; 51—Test line; 52—Test plug; 521—V-groove; 53—Test socket; 531—Test jack; 54—Temporary socket; 541—Temporary jack; 55—Guide block; 551—Bevel angle. Detailed Implementation

[0037] The technical solution will now be described in detail with reference to the accompanying drawings of the embodiments of this utility model.

[0038] Example 1

[0039] like Figure 9 As shown, the dedicated assembly for the test connection lines of the digital multimeter intelligent calibration system includes: a test line 51, a test socket 53, and a temporary socket 54; as shown... Figure 1 As shown, the detection socket 53 and the temporary socket 54 are installed on the tabletop 11, with the temporary socket 54 positioned in the middle of the automatic positioning device 3; as Figure 7 , 9 As shown, the temporary socket 54 is provided with multiple temporary sockets 541 for storing the test plugs 52 of the first and second test lines 51, which are inserted into the test holes of the digital multimeter 6 to be tested, when not in operation. The test socket 53 is connected to the metrological standard device 2; the test lines 51 are used to connect the test socket 53 to the digital multimeter 6 to be tested; as shown... Figure 2 , 5 As shown in Figure 6, detection plugs 52 are provided at both ends of the detection line 51. The detection plugs 52 are banana-shaped, and the upper end of the detection plugs 52 is provided with a V-shaped groove 521 that cooperates with the V-shaped gripper 412. During gripping, the V-shaped protrusion 4122 engages with the V-shaped groove 521 to achieve stable gripping. Figure 9As shown, the detection line 51 includes a first detection line 51 and a second detection line 51; the detection socket 53 is provided with a plurality of detection holes 531 that match the detection plug 52; as shown Figure 1 As shown, during testing, 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 test hole of the digital multimeter 6 under test, to transmit the measurement signal from the test socket 53 to the digital multimeter 6 under test. Figure 9 As shown, the detection plugs 52 of the first and second detection lines 51 are set at different heights to accommodate the narrow spacing between the detection holes in the digital multimeter 6, preventing clamping failure during insertion and removal. The V-grooves 521 on the detection plugs 52 of the first and second detection lines 51 are located at different heights, with the V-groove 521 on the higher detection plug 52 positioned higher than the top of the lower detection plug 52, facilitating gripping by the V-shaped jaws 412. Figure 7 , 8 As shown, multiple guide blocks 55 are provided on the test socket 53 and the temporary socket 54. The upper end of the guide block 55 is provided with a chamfer 551 to improve the accuracy of the test plug 52 when it is inserted into the test socket 531.

[0040] like Figure 1 As shown, during the calibration and testing process, the tester first places the digital multimeter 6 on the automatic positioning device 3. Initially, one end of the test cable 51, the test plug 52, is inserted into the test socket 53, and the other end into the temporary socket 54. After the digital multimeter 6 is positioned, the robotic arm 41 pulls the test plug 52 out of the temporary socket 541 and inserts it into the digital multimeter 6's socket, connecting the digital multimeter 6 to the metrological standard device 2 via the test socket 53 and the test cable 51. Then, the robotic arm 41 controls the V-shaped gripper 412 to rotate the rotary button on the digital multimeter 6 or press the button on the digital multimeter 6 to adjust it to the item to be tested. When gripping, the lower-height test plug 52 is gripped first and inserted into the digital multimeter 6, followed by the higher-height test plug 52. Finally, the reading of the digital multimeter 6 is acquired through the vision device 411. During reading, a light source is turned on to illuminate the reading area of ​​the digital multimeter 6 for visual acquisition.

[0041] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A test connection wire dedicated assembly for a digital multimeter intelligent calibration system device, characterized in that, The utility model relates to a digital multimeter detection device, including: Detection line (51), detection socket (53), detection plug (52) and V type jaw (412); The detection plug (52) is provided with a V-shaped groove (521) on the upper end of the detection plug (52); The detection line (51) includes a first detection line and a second detection line, both ends of the first detection line and the second detection line are provided with detection plugs (52), and during detection, the detection plug (52) at one end is inserted into the detection socket (53), and the detection plug (52) at the other end is inserted into the detection hole of the digital multimeter to be detected, so that the measurement signal is transmitted from the detection socket (53) to the digital multimeter to be detected; The V-shaped jaw (412) is provided with a V-shaped protrusion (4122) on the opposite surface, which matches the V-shaped groove (521) of the detection plug (52), so that the detection plug (52) is prevented from falling during grabbing; The detection socket (53) is installed on the table top and connected with the measurement standard equipment to transmit the measurement signal.

2. The test cord special assembly for a digital multimeter intelligent calibration system apparatus of claim 1, wherein, The detection plugs (52) of the first detection line and the second detection line are provided at different heights to adapt to the detection holes of digital multimeters to be detected with different spacings.

3. The test cord special assembly for a digital multimeter intelligent calibration system apparatus of claim 2, wherein, The V-shaped grooves (521) of the detection plugs (52) of the first detection line and the second detection line are located at different heights, and the position of the V-shaped groove (521) on the detection plug (52) with a higher height is higher than the top of the detection plug (52) with a lower height, so that the V-shaped jaw (412) can be easily grabbed.

4. The test cord special assembly for a digital multimeter intelligent calibration system apparatus of claim 3, wherein, The V-shaped jaw (412) is composed of two clamping plates (4121), the clamping plates (4121) are perpendicular to the table top, the V-shaped protrusions (4122) are arranged on the opposite surfaces of the two clamping plates (4121) and match the V-shaped grooves (521) on the upper ends of the detection plugs (52), the V-shaped protrusions (4122) are engaged with the V-shaped grooves (521) during grabbing to realize stable grabbing.

5. The test cord special assembly for a digital multimeter intelligent calibration system apparatus of claim 4, wherein, The detection socket (53) is provided with a plurality of detection holes (531) matching the detection plugs (52), and the detection holes (531) are connected with the measurement standard equipment.

6. The test cord specific assembly for a digital multimeter smart calibration system apparatus of any one of claims 1 to 5, wherein, The utility model also includes a temporary socket (54) installed on the automatic positioning device, the temporary socket (54) is provided with a plurality of temporary holes (541) for storing the detection plugs (52) inserted into the detection holes of the digital multimeters to be detected at one end of the first detection line and the second detection line in a non-working state.

7. The test cord specific assembly for a digital multimeter smart calibration system apparatus of any one of claims 1 to 5, wherein, The utility model also includes a collaborative robot (4) for controlling the V-shaped jaw (412) to realize automatic grabbing, plugging and calibration of the detection plug (52).

8. The test cord special assembly for a digital multimeter intelligent calibration system apparatus of claim 6, wherein, The detection socket (53) and the temporary socket (54) are provided with a plurality of guide blocks (55), the upper ends of the guide blocks (55) are provided with guide angles (551) to improve the accuracy of the detection plug (52) inserted into the detection hole (531).

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