A test device for liquid nitrogen pressurized delivery based on LABVIEW

Abstract

This invention provides a LabVIEW-based experimental device for liquid nitrogen pressurization and delivery, comprising: a liquid nitrogen supply mechanism, an intelligent control module, and a data acquisition module. The liquid nitrogen supply mechanism includes a liquid nitrogen storage tank for pressurization and delivery and a solenoid valve, the solenoid valve controlling the output of liquid nitrogen from the storage tank. The intelligent control module includes a LabVIEW host computer and an I / O board. The I / O board is interconnected with the LabVIEW host computer and connected to the solenoid valve to output control signals to open the solenoid valve. The data acquisition module includes a pressure sensor mounted on the liquid nitrogen storage tank. The I / O board collects information from the pressure sensor in real time and transmits it to the LabVIEW host computer. This experimental device enables automated data acquisition and control of the liquid nitrogen pressurization and delivery process.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen pressurization and transportation, and specifically to a test device for liquid nitrogen pressurization and transportation based on LabVIEW. Background Technology

[0002] Current liquid nitrogen pressurization and delivery systems are primarily controlled manually locally. While maintaining a basic supply of cryogenic medium at -196℃, they are limited by the configuration level of local display units such as pressure gauges. Key operating parameters, including dynamic changes in tank liquid level, lack digital recording mechanisms, resulting in a lack of data traceability throughout the system's lifecycle. These liquid nitrogen pressurization systems typically employ traditional solutions using mechanical instruments or isolated digital instruments, forcing maintenance personnel to perform periodic on-site data collection. This approach suffers from drawbacks such as discrete sampling periods, accumulated human error, and decreased operational efficiency.

[0003] Therefore, there is an urgent need to design a LabVIEW-based experimental device for automated acquisition of operating parameters and high-efficiency liquid nitrogen pressurization and delivery. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a test device for liquid nitrogen pressurization and delivery based on LabVIEW.

[0005] This invention provides a LabVIEW-based experimental device for pressurized liquid nitrogen delivery, comprising: a liquid nitrogen supply mechanism, an intelligent control module, and a data acquisition module; the liquid nitrogen supply mechanism includes a liquid nitrogen storage tank for pressurized delivery and a solenoid valve, the solenoid valve being used to control the output of liquid nitrogen from the liquid nitrogen storage tank; the intelligent control module includes a LabVIEW host computer and an I / O board, the I / O board being interactively connected to the LabVIEW host computer, and the I / O board being connected to the solenoid valve to output control signals to open the solenoid valve; the data acquisition module includes a pressure sensor installed on the liquid nitrogen storage tank, the I / O board acquiring the information from the pressure sensor in real time and transmitting it to the LabVIEW host computer.

[0006] According to one embodiment of the present invention, the LABVIEW host computer acquires the data from the pressure sensor and displays it on a display.

[0007] According to one embodiment of the present invention, the solenoid valve is a proportional valve.

[0008] According to one embodiment of the present invention, the LABVIEW host computer communicates with the IO board via Ethernet communication.

[0009] According to one embodiment of the present invention, the LABVIEW host computer displays the liquid level and volume obtained from the data of the pressure sensor.

[0010] According to one embodiment of the present invention, the LABVIEW host computer presents the data of the pressure sensor through a table or bar chart.

[0011] According to one embodiment of the present invention, the LABVIEW host computer presents the liquid nitrogen storage tank level or volume through a bar chart.

[0012] According to one embodiment of the present invention, the LABVIEW host computer uses TDMS file format to store experimental data.

[0013] According to one embodiment of the present invention, the LABVIEW host computer can generate customized reports.

[0014] The experimental apparatus for liquid nitrogen pressurization and delivery in this embodiment achieves intelligent and automated control of the liquid nitrogen pressurization and delivery process by adding an intelligent control module and a data acquisition module to the liquid nitrogen supply mechanism. This avoids human reading errors caused by manually opening and closing valves and significantly improves control accuracy.

[0015] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0016] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of the utility model.

[0017] Figure 1 This is a schematic diagram of a LabVIEW-based experimental device for pressurized delivery of liquid nitrogen, according to one embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of a LabVIEW-based test device for pressurized delivery of liquid nitrogen, according to another embodiment of this utility model. Detailed Implementation

[0019] The features and exemplary embodiments of various aspects of this utility model will be described in detail below. To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this utility model and to exemplarily illustrate the principles of this utility model, and are not configured to limit this utility model. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of this utility model.

[0020] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this utility model. In the description of this utility model, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0022] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., and should not be considered limiting. Similar terms are used throughout the description to refer to similar elements.

[0023] For those skilled in the art, this invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples.

[0024] Figure 1This is a schematic diagram of a LabVIEW-based experimental device for pressurized delivery of liquid nitrogen, according to one embodiment of this utility model. Figure 2 This is a schematic diagram of a LabVIEW-based test device for pressurized delivery of liquid nitrogen, according to another embodiment of this utility model.

[0025] like Figure 1 and Figure 2 As shown, this utility model provides a test device for liquid nitrogen pressurization and delivery based on LabVIEW. The device includes a liquid nitrogen supply mechanism, an intelligent control module, and a data acquisition module.

[0026] The liquid nitrogen supply system includes a liquid nitrogen storage tank for pressurized delivery and a solenoid valve. The solenoid valve controls the output of liquid nitrogen from the storage tank. The solenoid valve is a proportional valve, allowing for controlled output of liquid nitrogen at different flow rates. The liquid nitrogen storage tank consists of an inner liner and an outer layer, with a sandwich layer between them providing insulation. An inlet is located at the bottom of the tank, connecting to a liquid nitrogen pipeline used to deliver liquid nitrogen into the storage tank.

[0027] The intelligent control module includes a LabVIEW host computer and an I / O board. The LabVIEW host computer connects to a remote terminal via a network to receive remote control commands and perform central processing. The LabVIEW host computer communicates with the I / O board via Ethernet to receive and send control signals. The experimental apparatus of this application realizes intelligent and automated control of the liquid nitrogen pressurization and delivery process, avoiding human reading errors caused by manually opening and closing valves, and significantly improving control accuracy.

[0028] The data acquisition module includes a pressure sensor mounted on the liquid nitrogen storage tank. The pressure sensor collects the internal pressure value of the tank in real time and converts it into an electrical signal. An I / O board collects the information from the pressure sensor in real time and transmits it to a LabVIEW host computer. This module enables real-time monitoring of the liquid nitrogen pressurization process, effectively solving the problem of simply monitoring pressure in existing technologies and meeting safety requirements in special environments.

[0029] The LabVIEW host computer, based on a preset control program and real-time pressure data, automatically calculates and adjusts the opening and closing times of the solenoid valves, thereby achieving precise measurement and flow control of liquid nitrogen in the liquid nitrogen storage tank. When the pressure in the tank is detected to be too low, the LabVIEW host computer automatically sends an alarm message to the remote terminal. This experimental setup enables full monitoring and management of the liquid nitrogen pressurization and delivery process. Through the collaborative work of the LabVIEW host computer and the I / O board, remote control functionality is achieved, greatly improving the flexibility and operability of the equipment.

[0030] The LABVIEW host computer also includes a human-machine interface for displaying real-time monitoring parameters such as pressure sensor data, as well as displaying the liquid level and volume obtained from the pressure sensor data. The specific calculation method is as follows.

[0031] The formula for calculating the liquid level in a liquid nitrogen storage tank is:

[0032]

[0033] Where h is the liquid level height, ΔP is the pressure difference, ρ is the density of the liquid, and g is the acceleration due to gravity.

[0034] The formula for calculating the volume of a liquid nitrogen storage tank is:

[0035] V = π*r 2 *h

[0036] Where V is the volume and r is the radius of the storage tank.

[0037] In this embodiment, pressure sensor data can be presented in tables or bar charts, and the liquid nitrogen storage tank level and volume can be displayed in bar charts. The human-machine interface can be designed with a 10-inch touchscreen, facilitating parameter settings and status monitoring for operators, allowing them to intuitively observe changes in various parameters during the liquid nitrogen pressurization and delivery process. The experimental data is stored in TDMS file format, which features fast storage speed, small file size, strong compatibility, and ease of retrieval. This format helps designers efficiently select and analyze data, reduces the time spent searching for effective data, improves work efficiency, and saves storage resources.

[0038] In one embodiment, the LabVIEW host computer programs various operations and situations during the experiment as corresponding message events. When a message event occurs, the system responds instantly and executes the corresponding operation, while maintaining relative independence yet enabling collaboration between underlying programs to meet experimental requirements. The LabVIEW host computer stores experimental data in TDMS file format and can generate customized reports.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A test device based on LABVIEW for pressurized delivery of liquid nitrogen, characterized in that, include: Liquid nitrogen supply mechanism, intelligent control module, data acquisition module; The liquid nitrogen supply mechanism includes a liquid nitrogen storage tank capable of pressurizing and delivering liquid nitrogen and a solenoid valve, wherein the solenoid valve is used to control the output of liquid nitrogen from the liquid nitrogen storage tank; The intelligent control module includes a LabVIEW host computer and an IO board. The IO board is interactively connected to the LabVIEW host computer and is connected to the solenoid valve to output control signals to open the solenoid valve. The data acquisition module includes a pressure sensor installed on the liquid nitrogen storage tank. The I / O board collects information from the pressure sensor in real time and transmits it to the LABVIEW host computer.

2. The test device for LABVIEW-based pressurized delivery of liquid nitrogen according to claim 1, characterized in that, The LabVIEW host computer acquires the data from the pressure sensor and displays it on the monitor.

3. The experimental apparatus for liquid nitrogen pressurization and delivery based on LabVIEW according to claim 1, characterized in that, The solenoid valve is a proportional valve.

4. The experimental apparatus for liquid nitrogen pressurization and delivery based on LabVIEW according to claim 1, characterized in that, The LabVIEW host computer communicates with the IO board via Ethernet.

5. The experimental apparatus for liquid nitrogen pressurization and delivery based on LabVIEW according to claim 2, characterized in that, The LabVIEW host computer displays the liquid level and volume obtained from the data of the pressure sensor.

6. The experimental apparatus for liquid nitrogen pressurization and delivery based on LabVIEW according to claim 5, characterized in that, The LabVIEW host computer displays the pressure sensor data through tables or bar charts.

7. The test device for pressurized delivery of liquid nitrogen based on LABVIEW according to claim 6, characterized in that, The LabVIEW host computer displays the liquid nitrogen tank level and / or volume through a bar chart.

8. The test device for pressurized delivery of liquid nitrogen based on LABVIEW according to claim 7, characterized in that, The LabVIEW host computer uses TDMS file format to store experimental data.

9. The experimental apparatus for liquid nitrogen pressurization and delivery based on LabVIEW according to claim 8, characterized in that, The LabVIEW host computer can generate customized reports.

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