Metering calibration verification instrument

Abstract

The utility model relates to the technical field of metering calibration, and discloses a metering calibration calibrator which comprises a calibration workbench, a calibration assembly is arranged on the calibration workbench, the calibration assembly comprises a calibration weight, a crane scale is arranged at the upper end of the calibration weight, a lifting device is arranged at the upper end of the crane scale, and the lifting device is arranged on the calibration workbench. A connecting piece is arranged at the upper end of the crane scale, and a plurality of laser positioning lamps are arranged on the connecting piece; through cooperative use of the double-shaft feeding system, the lifting device and the verification assembly, the lifting device stretches out and draws back to adjust the height of the hoist scale and change the pulling force of the hoist scale on the verification weight so as to adjust the pressure generated by the verification weight on the electronic balance, and at the moment, the reading of the electronic balance is equal to the difference between the mass of the verification weight and the value measured by the hoist scale. The calibration quality can be flexibly calibrated according to needs, the weights do not need to be manually and frequently taken, placed and replaced, and the effects of low manual intervention and high calibration and calibration efficiency are achieved.

Description

Technical Field

[0001] The present application relates to the field of metrology and calibration technology, and in particular to a metrology and calibration tester. Background Art

[0002] Measuring instruments require calibration and verification after production or after a period of use. This is particularly true for electronic balances. Traditional methods rely heavily on manual calibration, where workers use tools like tweezers to hold weights and place them one by one on the balance to be calibrated. This method works adequately for calibrating a single balance, but its limitations become apparent when a large number of balances need to be calibrated simultaneously or continuously.

[0003] First, manually clamping and placing the weights one by one is not only time-consuming and labor-intensive, significantly increasing the workload and significantly reducing calibration efficiency. Second, prolonged manual operation can easily cause weights to fall due to hand fatigue or shaking, leading to damage and knocks. This, to a certain extent, affects the service life of the calibration weights. Utility Model Content

[0004] In order to solve the problem that the existing electronic balance calibration and verification relies on manual removal and replacement of weights, which has low work efficiency and high labor intensity, the present application provides a measurement calibration and verification instrument.

[0005] The present application provides a measurement calibration and verification instrument that adopts the following technical solutions:

[0006] A metrology calibration and verification instrument comprises a verification workbench, on which a verification component is arranged, the verification component comprises a verification weight, the upper end of the verification weight is provided with a hanging scale for weighing the verification weight, and the upper end of the hanging scale is provided with a lifting device for adjusting the position of the hanging scale to achieve a change in the equivalent mass of the verification weight.

[0007] Preferably, a cabinet door is provided on the front of the calibration workbench, and the calibration workbench includes a frame for overall support, and a plurality of partitions are provided on the frame for isolating the influence of airflow on the calibration results, and a support plate is provided on the frame.

[0008] Preferably, a dual-axis feeding system is provided between the lifting device and the frame for driving the lifting device to move along the X-axis and Y-axis directions.

[0009] Preferably, a connecting piece is provided at the upper end of the hanging scale, and a plurality of laser positioning lights are provided on the connecting piece.

[0010] Preferably, a distance measuring sensor is further provided on the connecting member, and the distance measuring sensor is electrically connected to the external terminal controller.

[0011] In summary, this application has the following beneficial technical effects:

[0012] By cooperating with the dual-axis feeding system, the lifting device and the calibration component, the dual-axis feeding system is used to drive the calibration weight to move along the X-axis and the Y-axis, and the horizontal position of the calibration weight relative to the electronic balance is adjusted to achieve centering and offset calibration. The height of the hanging scale is adjusted by telescoping the lifting device, and the pulling force of the hanging scale on the calibration weight is changed, thereby adjusting the pressure generated by the calibration weight on the electronic balance. At this time, the reading of the electronic balance is equal to the difference between the mass of the calibration weight and the value measured by the hanging scale. The calibration mass can be flexibly calibrated as needed without the need for frequent manual removal and replacement of weights. Compared with the existing technology, it has the effect of low manual intervention and high calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a first-perspective three-dimensional structure of an embodiment of the application;

[0014] Figure 2 is a schematic diagram of a second perspective three-dimensional structure of an embodiment of the application;

[0015] Figure 3 It is an enlarged schematic diagram of the structure at point A of the application embodiment.

[0016] Explanation of the accompanying symbols: 1. Calibration workbench; 101. Frame; 102. Partition; 2. Support plate; 3. Dual-axis feeding system; 4. Lifting device; 5. Calibration component; 501. Hanging scale; 502. Calibration weight; 503. Connector; 504. Distance measuring sensor; 505. Laser positioning light; 6. Electronic balance; 7. Cabinet door. DETAILED DESCRIPTION

[0017] The following is combined with the accompanying drawings Figure 1-3 This application is described in further detail.

[0018] The embodiment of the present application discloses a measurement calibration instrument. Figure 1 A metrology calibration and verification instrument includes a calibration workbench 1. The calibration workbench 1 comprises a frame 101 with a cabinet door 7 hingedly mounted on one side. A support plate 2 is mounted in the middle of the frame 101, upon which an electronic balance 6 to be tested is placed. Partitions 102 are mounted on the remaining sides and top of the frame 101. The combination of partitions 102, support plates 2, and cabinet door 7 forms a closed calibration test space, replacing the windshield of the electronic balance 6 and preventing airflow disturbances from affecting the accuracy of the calibration results. The windshield of the electronic balance 6 can be removed during subsequent calibration.

[0019] Reference Figure 2 and Figure 3 The upper end of the frame 101 is mounted with a dual-axis feed system 3. The movable end of the dual-axis feed system 3 is mounted with a lifting device 4, which utilizes a high-precision HDDG precision electric cylinder. The lower end of the lifting device 4 is connected to a calibration assembly 5, which includes a connector 503 mounted on the movable end of the lifting device 4. A hanging scale 501 is mounted at the lower end of the connector 503. The hanging scale 501 utilizes a high-precision, small-capacity hanging scale. For example, for a hanging scale with a maximum capacity of 1kg, available models include: ME-T 1S / 0.1C, Explorer Pro EP1252, CPA1P, etc. A calibration weight 502 is suspended from the lower end of the hanging scale 501. By driving the lifting device 4 to move along the X-axis and Y-axis directions through the dual-axis feeding system 3, and coordinating with the telescopic adjustment of the lifting device 4, the position of the hanging scale 501 in the three-axis space can be adjusted, thereby changing the position of the verification weight 502 relative to the electronic balance 6, and then adjusting the pressure generated by the verification weight 502 on the electronic balance 6. At this time, the reading of the electronic balance 6 is equal to the difference between the mass of the verification weight 502 and the value measured by the hanging scale 501. The verification mass can be flexibly calibrated as needed without the need for frequent manual replacement of weights.

[0020] The calculation principle is as follows: the actual mass of the calibration weight 502 is M in grams or kilograms; the upward pulling force applied by the dual-axis feed system 3 is F in Newtons; and the local acceleration due to gravity is g.

[0021] Then, the value displayed by the electronic balance 6 shows M1:

[0022] M 1 =M-Fg;

[0023] Values ​​measured by crane scale 501:

[0024] M 2 =Fg;

[0025] Therefore, the difference between the actual mass of the numerical verification weight 502 detected by the electronic balance 6 and the value measured by the hanging scale 501 is M1=M-M2.

[0026] Reference Figure 3 Three laser positioning lights 505 are mounted on the connecting member 503 and are distributed around the outside of the hanging scale 501 to facilitate the position of the calibration weight 502 on the electronic balance 6. A distance sensor 504 is also mounted on the connecting member 503. The distance sensor 504 is electrically connected to an external terminal controller. The controller and distance sensor can be customized as needed. The control system sets the displacement distance of the lifting device 4 and adjusts the pulling force of the hanging scale 501 on the calibration weight 502.

[0027] The implementation principle of a measurement calibration and verification instrument in the embodiment of the present application is as follows:

[0028] Open the cabinet door 7, place the electronic balance 6 to be tested on the support plate 2, and close the cabinet door 7. Start the dual-axis feeding system 3, and drive the hanging scale 501 and the calibration weight 502 to move through the electric cylinder. Change the height of the hanging scale 501 and the calibration weight 502 by adjusting the lifting device 4. At the same time, use the distance sensor 504 to monitor the displacement to ensure that the force applied by the weight to the electronic balance is controllable, thereby accurately controlling the position of the weight and the pressure applied. When the weight 502 moves to the electronic balance 6, record the display value of the electronic balance 6 and the reading of the hanging scale 501. Based on the recorded readings of the electronic balance 6 and the readings of the hanging scale 501, perform calculation verification to determine whether the sum of the readings of the electronic balance 6 and the readings of the hanging scale 501 is the same as the actual mass of the calibration weight 502.

[0029] The control system sets the displacement distance of the lifting device 4 to optimize the weight application method. After the verification is completed, the verification weight 502 is withdrawn, the cabinet door 7 is closed, the final verification result is recorded, and a report is generated.

[0030] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0031] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0032] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0033] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A metrological calibration and verification instrument, comprising a verification workbench (1), characterized in that: A calibration component (5) is provided on the calibration workbench (1), the calibration component (5) comprising a calibration weight (502), a hanging scale (501) provided on the upper end of the calibration weight (502) for weighing the calibration weight (502), and a lifting device (4) provided on the upper end of the hanging scale (501) for adjusting the position of the hanging scale (501) to achieve a change in the equivalent mass of the calibration weight (502).

2. A metrological calibration and verification instrument according to claim 1, characterized in that: The front of the calibration workbench (1) is provided with a cabinet door (7). The calibration workbench (1) comprises a frame (101) for overall support. The frame (101) is provided with a plurality of partitions (102) for isolating the influence of airflow on the calibration results. The frame (101) is provided with a support plate (2).

3. A metrological calibration and verification instrument according to claim 2, characterized in that: A dual-axis feeding system (3) is provided between the lifting device (4) and the frame (101) for driving the lifting device (4) to move along the X-axis and Y-axis directions.

4. A metrological calibration and verification instrument according to claim 1, characterized in that: The upper end of the hanging scale (501) is provided with a connecting piece (503), and a plurality of laser positioning lights (505) are provided on the connecting piece (503).

5. A metrological calibration and verification instrument according to claim 4, characterized in that: The connecting member (503) is also provided with a distance measuring sensor (504), and the distance measuring sensor (504) is electrically connected to an external terminal controller.

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