Piston rotation duration measuring and calculating device for liquid piston type pressure gauge

Abstract

According to the piston rotation duration measuring and calculating device for the liquid piston type pressure gauge, the piston to be measured is installed through the installation base on the inspection bench, the piston can rotate on the installation base, images are collected in real time through the high-speed camera assembly above the piston in the piston rotation process, and the piston rotation duration measuring and calculating device is used for measuring and calculating the piston rotation duration of the liquid piston type pressure gauge. The camera is used for collecting images of the piston to be measured and transmitting the collected images to the industrial control host assembly, and the industrial control host assembly is used for analyzing the obtained images, so that measurement and calculation of the rotation duration of the piston are completed, and data of the rotation duration of the piston to be measured are obtained. According to the utility model, image detection is used for measuring and calculating the rotation duration of the piston, and the obtained images are identified frame by frame, so that the measurement result of the rotation duration of the piston is obtained; the technical problems that in the prior art, the rotation duration of the piston of the liquid piston type pressure gauge is measured and calculated through a manual meter clamping mode or a photoelectric sensor and a coded disc mode, errors are large, and use is inconvenient are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquid piston type pressure gauge technical field, concretely relates to a piston rotation continuation time measuring and calculating device for liquid piston type pressure gauge. BACKGROUND

[0002] Liquid piston type pressure gauge is a kind of equipment using liquid to transfer pressure, and the pressure is measured by piston balance, based on Pascal principle and fluid statics balance, and the pressure value is calculated by weight and piston mass balance.Liquid piston type pressure gauge occupies an important position in pressure measurement technology, and is often used as standard pressure measurement instrument.

[0003] The verification work of liquid piston type pressure gauge is particularly important, and is directly related to the use accuracy of liquid piston type pressure gauge.Among them, the measurement of piston rotation continuation time directly affects the dynamic response rate of liquid piston type pressure gauge, and has important significance.

[0004] The measurement method of piston rotation continuation time in the prior art is generally artificial watch measuring or photoelectric sensor plus code disc measuring mode.However, artificial watch measuring has many uncertain factors, resulting in low accuracy and inconvenience in use;And the photoelectric sensor plus code disc mode needs different photoelectric code discs for different pistons, and the measurement accuracy of photoelectric sensor will decrease under low speed, resulting in limited use range and large error under low speed.Therefore, the measurement method of piston rotation continuation time in the prior art has the technical problems of large error and inconvenience in use. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems of large error and inconvenience in use in the background art, the piston rotation continuation time measuring and calculating device for liquid piston type pressure gauge is provided.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A piston rotation continuation time measuring and calculating device for liquid piston type pressure gauge, the piston rotation continuation time measuring and calculating device for liquid piston type pressure gauge includes: test bench, high-speed camera assembly and industrial computer host assembly;The upper side of the test bench movably provided with mounting seat, the mounting seat is used to install the piston to be measured;The high-speed camera assembly is partially arranged above the mounting seat;The industrial computer host assembly is electrically connected with the high-speed camera assembly, and is used to measure the piston rotation continuation time in real time through the image obtained by the high-speed camera assembly.

[0008] Optionally, the high-speed camera assembly comprises a high-speed industrial camera, a connecting rod and a bracket.

[0009] The bracket is arranged at the side of the inspection table.

[0010] The high-speed industrial camera is installed on the bracket through the connecting rod, and the high-speed industrial camera is directly above the mounting seat.

[0011] The high-speed industrial camera is electrically connected with the industrial host assembly.

[0012] Optionally, the connecting rod comprises a clamping piece, a rod body and a camera seat.

[0013] The clamping piece and the camera seat are arranged at two ends of the rod body, respectively.

[0014] The high-speed industrial camera is installed on the camera seat.

[0015] The clamping piece is sleeved on the bracket.

[0016] Optionally, the high-speed camera assembly further comprises an illumination assembly.

[0017] The illumination assembly is movably installed on the bracket and is between the high-speed industrial camera and the mounting seat.

[0018] Optionally, the illumination assembly is a ring-shaped lamp.

[0019] Optionally, the industrial host assembly comprises a host, a display and a power supply.

[0020] The host is electrically connected with the display, the power supply and the high-speed industrial camera.

[0021] The power supply is electrically connected with the high-speed industrial camera and the illumination assembly.

[0022] Optionally, the piston rotation duration measuring device further comprises a marking piece, which is used for adhering to the top of the piston to be measured as a measuring reference.

[0023] Optionally, the marking piece is a fluorescent sheet.

[0024] The piston rotation duration measuring device has the following advantages:

[0025] This invention provides a device for measuring the piston rotation duration of a liquid piston pressure gauge. The piston to be tested is mounted on a mounting base on a test bench, allowing it to rotate. During piston rotation, a high-speed camera component above the gauge captures images in real time and transmits them to an industrial control host component. The host component analyzes the acquired images to calculate the piston rotation duration, obtaining the data for the piston rotation duration of the test piston. This invention utilizes image detection in the calculation of piston rotation duration through a high-speed camera component and an industrial control host component. It identifies each frame of the acquired images to obtain the measurement result of the piston rotation duration, avoiding the technical problems of large errors and inconvenience associated with existing technologies that rely on manual caliper calculations or photoelectric sensors with encoders to measure the piston rotation duration of liquid piston pressure gauges. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the piston rotation duration calculation device for a liquid piston pressure gauge in this utility model.

[0027] Figure 2 This is a schematic diagram of the piston rotation duration measurement device in this utility model;

[0028] Figure 3 This is a schematic diagram of the high-speed camera assembly in this utility model;

[0029] Figure 4 This is a top view of the piston to be tested with markings in this utility model;

[0030] Figure 5 This is a schematic diagram of an alternating light and dark photoelectric encoder used in existing technology.

[0031] The components include: 1. Inspection table; 11. Mounting base; 2. High-speed camera assembly; 21. High-speed industrial camera; 22. Connecting rod; 221. Clip; 222. Rod body; 223. Camera mount; 23. Bracket; 231. Bracket base; 232. Bracket rod; 24. Lighting assembly; 3. Industrial control host assembly; 31. Host; 32. Monitor; 33. Power supply; 4. Piston under test; 5. Identification component. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0035] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0038] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] The measurement of piston rotation duration is an important indicator that directly affects the dynamic response rate of liquid piston pressure gauges. According to the verification procedures for liquid piston pressure gauges, in the verification of piston rotation duration and piston descent speed, the piston rotation duration sometimes needs to be measured in real time for more than 6 minutes until the rotation completely stops.

[0040] Current technologies for measuring piston rotation duration typically employ either manual caliper measurement or measurement using a photoelectric sensor and encoder. However, manual caliper measurement suffers from numerous uncertainties, resulting in low accuracy and inconvenience. Furthermore, the photoelectric sensor and encoder method requires different encoders for different pistons, such as… Figure 5 As shown, an alternating light and dark photoelectric encoder disk is used to accompany the piston's rotation. The alternating light and dark pattern on the photoelectric sensor and the photoelectric encoder disk is used to analyze and obtain the measurement data of the piston's rotation duration. However, when the speed is low, the measurement accuracy will decrease due to the pulse resolution bottleneck of the photoelectric sensor itself, resulting in a limited range of application and a large error at low speeds.

[0041] See Figure 1 and Figure 2The diagram shows a schematic of a piston rotation duration measurement device for a liquid piston pressure gauge provided in this utility model, including: a test bench 1, a high-speed camera assembly 2, and an industrial control host assembly 3; a mounting base 11 is movably provided on the upper side of the test bench 1, and the mounting base 11 is used to install the piston 4 to be measured; the high-speed camera assembly 2 is partially disposed above the mounting base 11; the industrial control host assembly 3 is electrically connected to the high-speed camera assembly 2, and is used to measure the piston rotation duration in real time through the image acquired by the high-speed camera assembly 2.

[0042] In this embodiment, the piston 4 to be tested is mounted on the mounting base 11 on the inspection table 1, and the piston 4 is rotated on the mounting base 11. During the rotation of the piston 4, the high-speed camera component 2 above it acquires images in real time, and transmits the acquired images to the industrial control host component 3. The industrial control host component 3 analyzes the acquired images to calculate the piston rotation duration, thus obtaining the piston rotation duration data of the piston 4 to be tested. This utility model uses the high-speed camera component 2 and the industrial control host component 3 to apply image detection to the calculation of piston rotation duration. It identifies the acquired images frame by frame to obtain the measurement result of piston rotation duration, avoiding the technical problems of large errors and inconvenience in the prior art of calculating the piston rotation duration of liquid piston pressure gauges by manual caliper measurement or photoelectric sensor plus encoder.

[0043] Furthermore, the piston 4 to be tested in this utility model refers to the piston to be tested with a hanging basket plate. Its specific size, model and material can be selected by those skilled in the art according to actual production and use needs.

[0044] In practical use, first, according to the design parameters of the piston 4 under test, add corresponding weights to the piston 4 under test to generate corresponding pressure; install the piston 4 under test on the mounting base 11, adjust the high-speed camera assembly 2 so that it can clearly capture the piston 4 under test; rotate the piston 4 under test, and use the industrial control host assembly 3 to analyze and process the acquired rotation images in real time to obtain the rotational speed of the piston 4 under test in real time; when the real-time rotational speed of the piston 4 under test decreases to 20r every 10s, start timing until the rotational speed of the piston 4 under test completely drops to 0, that is, when the piston 4 under test completely stops rotating, stop timing, thereby obtaining the piston rotation duration measurement result of the piston 4 under test; or, the time point when the real-time rotational speed of the piston 4 under test decreases to 20r every 10s can be marked as the first time point, and the time point after the piston 4 under test completely stops rotating can be marked as the second time point, and the piston rotation duration measurement result of the piston 4 under test can be calculated based on the first time point and the second time point. It should be noted that the above methods for calculating the piston rotation duration of the piston 4 under test are only some examples that can be selected. Those skilled in the art can choose the specific method for calculating the piston rotation duration of the piston 4 under test using this device according to actual usage requirements.

[0045] Specifically, in this embodiment, the industrial control host component 3 is used to analyze and process the acquired rotation images in real time. When the rotation speed of the piston 4 under test is obtained in real time, a point can be selected on the upper side of the piston 4 under test as a reference point. In the acquired image, each rotation of the reference point represents one rotation of the piston 4 under test. The rotation speed of the piston 4 under test can be obtained by combining the rotation time.

[0046] Optionally, refer to Figure 2 The high-speed camera assembly 2 in this utility model includes a high-speed industrial camera 21, a connecting rod 22, and a bracket 23; the bracket 23 is set on the side of the inspection table 1; the high-speed industrial camera 21 is mounted on the bracket 23 through the connecting rod 22, and the high-speed industrial camera 21 is located directly above the mounting base 11; the high-speed industrial camera 21 is electrically connected to the industrial control host assembly 3.

[0047] In this embodiment, the high-speed industrial camera 21 is mounted on the bracket 23 using the connecting rod 22. During use, the height and angle of the high-speed industrial camera 21 can be adjusted using the connecting rod 22, which facilitates the installation of the piston 4 under test and allows the high-speed industrial camera 21 to be positioned directly above the piston 4 under test. During the rotation of the piston 4 under test, images of its rotation are acquired in real time, and the acquired images are transmitted to the industrial control host component 3 for analysis and processing.

[0048] Furthermore, refer to Figure 3The bracket 23 also includes a bracket base 231 and a bracket rod 232. The bracket base 231 is connected to the side of the inspection table 1, and the bracket rod 232 is fixedly installed on the bracket base 231; the connecting rod 22 is sleeved on the bracket rod 232.

[0049] Optionally, refer to Figure 3 The connecting rod 22 in this utility model includes a snap-fit ​​221, a rod body 222, and a camera mount 223; the snap-fit ​​221 and the camera mount 223 are respectively disposed at both ends of the rod body 222; the high-speed industrial camera 21 is mounted on the camera mount 223; the snap-fit ​​221 is sleeved on the bracket 23.

[0050] Specifically, the snap-fit ​​221 is sleeved on the support rod 232 of the bracket 23, and the snap-fit ​​221 is provided with fasteners. By adjusting the connection state between the snap-fit ​​221 and the support rod 232 using the fasteners, the height and direction of the connecting rod 22 and the high-speed industrial camera 21 can be adjusted.

[0051] Specifically, the high-speed industrial camera 21 in this utility model can be specifically selected as the MV-CS050-10UMUC model.

[0052] Optionally, the high-speed camera assembly 2 in this invention also includes an illumination assembly 24; the illumination assembly 24 is movably mounted on the bracket 23 and is located between the high-speed industrial camera 21 and the mounting base 11.

[0053] In this embodiment, an illumination component 24 is movably mounted on the bracket 23. During use, the piston 4 under test is illuminated, enabling the high-speed industrial camera 21 to acquire a clear image, which facilitates the industrial control host component 3 to perform calculations and analysis based on the image.

[0054] Optionally, the lighting component 24 in this invention is a ring lamp.

[0055] In this embodiment, the lighting component 24 is a ring light. During use, the ring light can be moved directly above the piston 4 under test, and the high-speed industrial camera 21 can be used to acquire images of the piston 4 under test from the hollow part of the ring light.

[0056] Optionally, the industrial control host component 3 in this utility model includes a host 31, a display 32, and a power supply 33; the host 31 is electrically connected to the display 32, the power supply 33, and the high-speed industrial camera 21; the power supply 33 is electrically connected to the high-speed industrial camera 21 and the lighting component 24.

[0057] In this embodiment, the host 31 and the display 32 are used to analyze and process the images acquired by the high-speed industrial camera 21 and display the results. The power supply 33 is used to power the high-speed industrial camera 21 and the lighting component 24.

[0058] Furthermore, in this embodiment, the host 31 can be selected as the IPC-610L model, the display 32 can be selected as the T2214sA model, and the power supply 33 can be selected as the AC-12-2L080W model. The host 31 is equipped with Vision Master software, which is used to identify and analyze the acquired images to obtain the piston rotation duration of the piston 4 under test. It should be noted that this embodiment only provides some optional solutions. Those skilled in the art can select the specific model and type of host 31, display 32, power supply 33, and image recognition and analysis software according to actual usage requirements. This embodiment does not impose further limitations.

[0059] Optionally, refer to Figure 4 The piston rotation duration measurement device of this utility model also includes an identifier 5, which is used to be attached to the top of the piston 4 to be measured as a measurement reference.

[0060] Optionally, the identification element 5 in this utility model is a fluorescent sheet.

[0061] In this embodiment, the marker 5 can be selected as a fluorescent sheet. In use, the marker 5 is attached to the top of the piston 4 to be tested as a measurement reference. When the marker 5 rotates around the axis of the piston 4 to be tested for one revolution, it means that the piston 4 to be tested has rotated one revolution, so as to accurately obtain the rotational speed of the piston 4 to be tested.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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 any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for measuring the piston rotation duration of a liquid piston pressure gauge, characterized in that, The piston rotation duration measurement device includes: an inspection table (1), a high-speed camera assembly (2), and an industrial control host assembly (3); The upper side of the test bench (1) is movably provided with a mounting base (11), which is used to install the piston (4) to be tested; The high-speed camera assembly (2) is partially disposed above the mounting base (11); The industrial control host component (3) is electrically connected to the high-speed camera component (2) and is used to calculate the piston rotation duration in real time using the image acquired by the high-speed camera component (2).

2. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 1, characterized in that, The high-speed camera assembly (2) includes a high-speed industrial camera (21), a connecting rod (22), and a bracket (23); The bracket (23) is disposed on the side of the inspection table (1); The high-speed industrial camera (21) is mounted on the bracket (23) via a connecting rod (22), and the high-speed industrial camera (21) is located directly above the mounting base (11); The high-speed industrial camera (21) is electrically connected to the industrial control host component (3).

3. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 2, characterized in that, The connecting rod (22) includes a snap-fit ​​component (221), a rod body (222), and a camera mount (223); The snap-fit ​​connector (221) and the camera mount (223) are respectively disposed at both ends of the rod (222); The high-speed industrial camera (21) is mounted on the camera mount (223); The snap-fit ​​component (221) is fitted onto the bracket (23).

4. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 2, characterized in that, The high-speed camera assembly (2) also includes an illumination assembly (24); The lighting component (24) is movably mounted on the bracket (23) and positioned between the high-speed industrial camera (21) and the mounting base (11).

5. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 4, characterized in that, The lighting component (24) is a ring lamp.

6. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 4, characterized in that, The industrial control host component (3) includes a host (31), a display (32), and a power supply (33); The host (31) is electrically connected to the display (32), the power supply (33) and the high-speed industrial camera (21); The power supply (33) is electrically connected to the high-speed industrial camera (21) and the lighting assembly (24).

7. The device for measuring the piston rotation duration of a liquid piston pressure gauge according to any one of claims 1 to 6, characterized in that, The piston rotation duration measurement device also includes an identifier (5), which is used to be attached to the top of the piston (4) to be measured as a measurement reference.

8. The piston rotation duration measuring device for a liquid piston pressure gauge according to claim 7, characterized in that, The identification element (5) is a fluorescent sheet.

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