Calibrating device for pressure measuring device

Abstract

The utility model relates to the technical field of metering, and provides a calibrating device for a pressure measuring device, which comprises a conduit, a standard pressure measuring device and a pressure generating unit. Wherein the standard voltage measuring device is communicated with the voltage measuring device; the pressure generating unit is communicated with the standard pressure measuring device and the pressure measuring device through a conduit; the voltage generating unit, the standard voltage measuring device and the voltage measuring device are in an isobaric state. According to the utility model, the standard pressure measuring device, the pressure measuring device and the pressure generating unit are communicated through the conduit, so that the three can be in an isobaric state. When the pressure generating unit generates a known pressure source, the value is measured and verified through the standard pressure measuring device, and the value displayed by the pressure measuring device is compared with the value displayed by the standard pressure measuring device to obtain the error of the pressure measuring device so as to complete verification; therefore, the pressure measuring device can be calibrated by using the pressure generating unit and the standard pressure measuring device, a cumbersome weight group and a piston pressure gauge with a large error are prevented from being used, the calibration error can be reduced, the calibration accuracy is improved, and the calibration efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of metrology technology, specifically to a pressure measuring device calibration device. Background Technology

[0002] Common pressure measuring devices include pressure gauges, pressure gauges, and differential pressure gauges. Pressure measuring devices that measure fluid pressure typically compare the pressure to be measured with a reference pressure (such as atmospheric pressure or other given pressure), thus measuring the relative pressure or pressure difference.

[0003] Before installation and use, or after a certain period of use, pressure measuring devices need to be calibrated. Upon successful calibration, a certificate of conformity will be issued to ensure the device's qualification and accuracy. During calibration, personnel will select a corresponding calibration pressure source (such as a weight set or piston gauge) based on the device's range. Simultaneously, following prescribed testing procedures, the pressure generated by the weight set and piston gauge will be compared with the output value of the pressure measuring device to determine its qualification.

[0004] However, during the calibration process, the weight set is heavy and inconvenient to carry. There is a gap between the piston rod and piston cylinder of the piston pressure gauge, resulting in a large pressure source error. This leads to low calibration accuracy of the calibration device, and it is often necessary to manually add or remove weights, resulting in low calibration efficiency of the pressure measuring device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a pressure measuring device calibration apparatus to solve at least one of the aforementioned technical defects in the prior art, reduce errors, improve accuracy, and enhance calibration efficiency.

[0006] To achieve the objective of this utility model, this utility model provides a pressure measuring device calibration device, which includes:

[0007] catheter;

[0008] A standard pressure measuring device, connected to the pressure measuring device;

[0009] The pressure-generating unit is connected to the standard pressure measuring device and the pressure measuring device via the conduit;

[0010] The pressure generating unit, the standard pressure measuring device, and the pressure measuring device are all in an isobaric state.

[0011] Preferably, the catheter includes a first catheter and a second catheter;

[0012] The first end of the first catheter is connected to the pressure measuring device, and the second end of the first catheter is connected to the standard pressure measuring device.

[0013] The first end of the second catheter is connected to the pressure-generating unit, and the second end of the second catheter is connected to the first catheter.

[0014] Preferably, it also includes a first universal connector and a second universal connector;

[0015] The first end of the first conduit is connected to the first universal connector, and the pressure measuring device is located on the first universal connector;

[0016] The second end of the first conduit is connected to the second universal connector, and the standard pressure measuring device is located on the second universal connector.

[0017] Preferably, it also includes a first acquisition unit, a first analysis unit, a second acquisition unit, and a second analysis unit;

[0018] The first acquisition unit is adapted to acquire the reading value of the pressure measuring device, and the second acquisition unit is adapted to acquire the reading value of the standard pressure measuring device;

[0019] The first analysis unit is electrically connected to the first acquisition unit and is adapted to analyze and display the data acquired by the first acquisition unit;

[0020] The second analysis unit is electrically connected to the second acquisition unit and is adapted to analyze and display the data acquired by the second acquisition unit.

[0021] Preferably, it further includes a processing unit;

[0022] The processing unit is electrically connected to the first analysis unit, the pressure generating unit, and the second analysis unit, and is adapted to process the error values ​​among the first analysis unit, the pressure generating unit, and the second analysis unit.

[0023] The beneficial effects of this utility model are as follows: The pressure measuring device calibration device provided by this utility model connects the standard pressure measuring device, the pressure measuring device, and the pressure generating unit through a conduit, so that the standard pressure measuring device, the pressure measuring device, and the pressure generating unit can be in an isobaric state. When the pressure generating unit generates a pressure source, this pressure source is known. The value of this known pressure source is then measured and verified by a standard pressure measuring device. The pressure value displayed by the pressure measuring device is compared with the pressure value displayed by the standard pressure measuring device to obtain the error of the pressure measuring device and complete the calibration. In this way, the pressure measuring device can be calibrated using the pressure generating unit and the standard pressure measuring device, avoiding the use of bulky weight sets and piston pressure gauges with large errors, reducing calibration errors, improving calibration accuracy, and increasing calibration efficiency. Attached Figure Description

[0024] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0025] Figure 1 A schematic diagram illustrating the structural principle of the pressure measuring device calibration device provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 100. Catheter; 110. First catheter; 111. First universal connector; 120. Second catheter; 121. Second universal connector;

[0028] 200. Standard pressure measuring devices;

[0029] 300. Pressure generating unit;

[0030] 400. Pressure measuring devices;

[0031] 500, First acquisition unit; 510, First analysis unit; 520, Second acquisition unit; 530, Second analysis unit;

[0032] 600. Processing Unit. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings.

[0034] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] The following is combined with Figure 1 The embodiments of this utility model will be described below. It should be understood that the following description is merely an illustrative embodiment of this utility model and does not constitute any limitation on this utility model.

[0037] See Figure 1This utility model provides a pressure measuring device calibration device, which includes a conduit 100, a standard pressure measuring device 200, and a pressure generating unit 300.

[0038] The standard pressure measuring device 200 and the pressure measuring device 400 are connected through the conduit 100.

[0039] The pressure generating unit 300 is also connected to the standard pressure measuring device 200 and the pressure measuring device 400 via the conduit 100.

[0040] The pressure generating unit 300, the standard pressure measuring device 200, and the pressure measuring device 400 are in an isobaric state.

[0041] When the pressure generating unit 300 generates a pressure source, for example, 50 MPa, since the pressure generating unit 300, the standard pressure measuring device 200, and the pressure measuring device 400 are connected and in an isobaric state, both the standard pressure measuring device 200 and the pressure measuring device 400 will experience the same pressure value as the pressure source generated by the pressure generating unit 300, i.e., 50 MPa. At this time, by observing the pressure value displayed by the pressure measuring device 400 and comparing it with the pressure value displayed by the standard pressure measuring device 200, the error of the pressure measuring device 400 can be determined, thereby achieving the calibration of the pressure measuring device 400.

[0042] It is understood that the pressure measuring device calibration apparatus provided in the embodiments of this application connects the standard pressure measuring device 200, the pressure measuring device 400, and the pressure generating unit 300 through the conduit 100, so that the standard pressure measuring device 200, the pressure measuring device 400, and the pressure generating unit 300 can be in an isobaric state. When the pressure generating unit 300 generates a pressure source, this pressure source is known. The value of this known pressure source is then measured and verified by a standard pressure measuring device 200. The pressure value displayed by the pressure measuring device 400 is compared with the pressure value displayed by the standard pressure measuring device 200 to obtain the error of the pressure measuring device 400 and complete the calibration. In this way, the pressure measuring device 400 can be calibrated using the pressure generating unit 300 and the standard pressure measuring device 200, avoiding the use of bulky weight sets and piston pressure gauges with large errors, reducing calibration errors, improving calibration accuracy, and increasing calibration efficiency.

[0043] Specifically, catheter 100 includes a first catheter 110 and a second catheter 120.

[0044] The first end of the first conduit 110 is connected to the pressure measuring device 400, and the second end of the first conduit 110 is connected to the standard pressure measuring device 200.

[0045] The first end of the second catheter 120 is connected to the pressure-generating unit 300, and the second end of the second catheter 120 is connected to the first catheter 110.

[0046] Using the first conduit 110 and the second conduit 120 to connect the pressure generating unit 300, the standard pressure measuring device 200 and the pressure measuring device 400 and make the three of them be in an isobaric state can simplify the structure of the calibration device and save costs.

[0047] In some embodiments of this utility model, in order to make it more convenient and quick to replace the standard pressure measuring device 200 and the pressure measuring device 400, the calibration device is also provided with a first universal connector 111 and a second universal connector 121.

[0048] The first end of the first conduit 110 is connected to the first universal connector 111, and the pressure measuring device 400 is disposed in the first universal connector 111.

[0049] The second end of the first conduit 110 is connected to the second universal connector 121, and the standard pressure measuring device 200 is set in the second universal connector 121.

[0050] After calibrating the first pressure measuring device 400, simply remove it from the first universal connector 111 to quickly replace it with the next pressure measuring device 400. Additionally, the standard pressure measuring device 200 can also be quickly replaced with standard pressure measuring devices of different ranges via the second universal connector 121.

[0051] In some embodiments of this utility model, the verification device further includes a first acquisition unit 500, a first analysis unit 510, a second acquisition unit 520, and a second analysis unit 530.

[0052] The first acquisition unit 500 can acquire the reading value of the pressure measuring device 400, and the second acquisition unit 520 can acquire the reading value of the standard pressure measuring device 200.

[0053] The first analysis unit 510 is electrically connected to the first acquisition unit 500 and can analyze and display the data acquired by the first acquisition unit 500; the second analysis unit 530 is electrically connected to the second acquisition unit 520 and can analyze and display the data acquired by the second acquisition unit 520.

[0054] Specifically, the first acquisition unit 500 can be a first camera, which corresponds to the pressure value displayed by the pressure measuring device 400; the second acquisition unit 520 can be a second camera, which corresponds to the pressure value displayed by the standard pressure measuring device 200.

[0055] The first analysis unit 510 can be a first computer monitor, which can be connected to the first camera via a data cable. The first computer monitor can display the pressure value of the pressure measuring device 400. The second analysis unit 530 can be a second computer monitor, which can also be connected to the second camera via a data cable. The second computer monitor can display the pressure value of the standard pressure measuring device 200. By comparing the pressure values ​​displayed on the first and second computer monitors, the error of the pressure measuring device 400 can be verified, resulting in higher visualization and more accurate verification results.

[0056] Of course, in some embodiments of this utility model, in order to improve the intelligence of the verification device, the verification device may also be equipped with a processing unit 600.

[0057] The processing unit 600 is electrically connected to the first analysis unit 510, the pressure generating unit 300, and the second analysis unit 530, and can process the error values ​​among the first analysis unit 510, the pressure generating unit 300, and the second analysis unit 530.

[0058] Specifically, the pressure measuring device 400 can be a pressure gauge, the standard pressure measuring device 200 can be a standard pressure gauge, the pressure generating unit 300 can be a pressure generator, and the processing unit 600 can be a microcontroller. The microcontroller can be connected to the first computer monitor, the pressure generator, and the second computer monitor via a data cable. The microcontroller can process the pressure error values ​​between the first computer monitor, the pressure generator, and the second computer monitor to complete the calibration operation.

[0059] For example, if a pressure generator produces a pressure value of 50 MPa, the second computer monitor displays 50 MPa (i.e., the pressure on the standard pressure gauge is 50 MPa), while the first computer monitor displays 49 MPa (i.e., the pressure gauge's reading is 49 MPa), then the error value of the pressure measuring device 400 (i.e., the pressure gauge) corresponding to the first computer monitor is 1 MPa. In this way, the microcontroller can determine the error value of the pressure measuring device 400, making the calibration results more accurate. Calibration personnel only need to replace the pressure measuring device 400 to be calibrated and the corresponding standard pressure measuring device 200, resulting in high calibration efficiency.

[0060] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the use of terms such as "preferred embodiment," "another embodiment," "some embodiments," "other embodiments," or "specific example," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for calibrating pressure measuring devices, characterized in that, include: catheter; A standard pressure measuring device, connected to the pressure measuring device; The pressure-generating unit is connected to the standard pressure measuring device and the pressure measuring device via the conduit; The pressure generating unit, the standard pressure measuring device, and the pressure measuring device are all in an isobaric state.

2. The pressure measuring device calibration device as described in claim 1, characterized in that, The catheter includes a first catheter and a second catheter; The first end of the first catheter is connected to the pressure measuring device, and the second end of the first catheter is connected to the standard pressure measuring device. The first end of the second catheter is connected to the pressure-generating unit, and the second end of the second catheter is connected to the first catheter.

3. The pressure measuring device calibration device as described in claim 2, characterized in that, It also includes a first universal connector and a second universal connector; The first end of the first conduit is connected to the first universal connector, and the pressure measuring device is located on the first universal connector; The second end of the first conduit is connected to the second universal connector, and the standard pressure measuring device is located on the second universal connector.

4. The pressure measuring device calibration apparatus according to any one of claims 1 to 3, characterized in that, It also includes a first acquisition unit, a first analysis unit, a second acquisition unit, and a second analysis unit; The first acquisition unit is adapted to acquire the reading value of the pressure measuring device, and the second acquisition unit is adapted to acquire the reading value of the standard pressure measuring device; The first analysis unit is electrically connected to the first acquisition unit and is adapted to analyze and display the data acquired by the first acquisition unit; The second analysis unit is electrically connected to the second acquisition unit and is adapted to analyze and display the data acquired by the second acquisition unit.

5. The pressure measuring device calibration device as described in claim 4, characterized in that, It also includes a processing unit; The processing unit is electrically connected to the first analysis unit, the pressure generating unit, and the second analysis unit, and is adapted to process the error values ​​among the first analysis unit, the pressure generating unit, and the second analysis unit.

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