Liquid level sensor test platform

Abstract

The utility model discloses a liquid level sensor test platform which comprises a liquid level detection platform and a PLC operation platform, the liquid level detection platform is provided with a liquid level pipe distributed in the vertical direction, a measuring pipe distributed in the horizontal direction and a water pump used for pumping liquid into the liquid level pipe, and the measuring pipe is communicated with the liquid level pipe. A liquid level sensor to be detected is arranged on the measuring tube; the PLC operating platform is provided with a touch control all-in-one machine and a liquid level display, the liquid level sensor is connected with a 485 communication line and an analog quantity output line, the 485 communication line is connected into the touch control all-in-one machine, the analog quantity output line is connected into the liquid level display, and the touch control all-in-one machine and the liquid level display can both display the water level value detected by the liquid level sensor. According to the utility model, the 485 communication function of the liquid level sensor can be accurately tested, and the water level value measured by the liquid level sensor can be compared with the actual water level value so as to test whether the output data of the liquid level sensor is accurate, thereby improving the delivery quality of the liquid level sensor.

Description

Technical Field

[0001] This utility model relates to the field of sensor testing technology, and in particular to a liquid level sensor testing platform. Background Technology

[0002] Liquid level measurement plays an important role in many fields, such as industrial water, fire protection, domestic water, water treatment, and food and beverage. As a key component for liquid level measurement, the performance and accuracy of liquid level sensors directly affect the normal operation and safety of related systems.

[0003] During the production and use of liquid level sensors, rigorous testing is required to ensure their accurate and reliable operation. However, traditional liquid level sensor testing methods often have several shortcomings. Currently, existing liquid level sensor testing equipment is only suitable for testing the analog output of the liquid level sensor, and cannot test the 485 communication signal of the liquid level sensor or the correspondence between the analog output value and the actual value. This results in poor accuracy of the test data, making it difficult to accurately evaluate the performance of the liquid level sensor. Therefore, it is necessary to improve the existing technology to overcome its deficiencies. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a liquid level sensor testing platform that can accurately test the 485 communication function of the liquid level sensor and compare the water level value measured by the liquid level sensor with the actual water level value in the liquid level tube to test whether the output data of the liquid level sensor is accurate, thereby improving the factory quality of the liquid level sensor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a liquid level sensor testing platform, including: a liquid level detection platform and a PLC operation platform. The liquid level detection platform is equipped with a liquid level tube, a measuring tube, and a water pump. The liquid level tube is distributed vertically and has an internal cavity for storing liquid. The water pump is used to pump liquid into the cavity to reach a specified liquid level. The measuring tube is distributed horizontally and connected to the liquid level tube. The liquid level sensor to be tested is mounted on the measuring tube. The PLC operation platform is equipped with a touch screen all-in-one machine and a liquid level display. The liquid level sensor is connected to a 485 communication line and an analog output line. The 485 communication line is connected to the touch screen all-in-one machine, and the analog output line is connected to the liquid level display. Both the touch screen all-in-one machine and the liquid level display can display the water level value detected by the liquid level sensor.

[0006] As a further improvement of this utility model, a first tee connector is provided in the middle of the measuring tube, a first valve is installed on the first tee connector, and the liquid level sensor is installed on the first valve.

[0007] As a further improvement of this utility model, multiple first tee connectors are provided, and a first valve is installed on each of the first tee connectors.

[0008] As a further improvement of this utility model, a second three-way connector is provided on the liquid level tube, one end of the measuring tube is connected to the second three-way connector, and a second valve is installed on the other end of the measuring tube.

[0009] As a further improvement of this utility model, a water tank is provided at the bottom of the liquid level detection platform, and the second valve is connected to the water tank via a drain pipe.

[0010] As a further improvement of this utility model, the water inlet of the water pump is connected to the water tank via an inlet pipe, and the water outlet of the water pump is connected to the liquid level pipe via an outlet pipe.

[0011] As a further improvement of this utility model, the top of the liquid level detection platform is provided with a cover plate, the cover plate is provided with a water tank, and the water tank is provided with a drain outlet, the drain outlet is set downward and facing the water tank, and the liquid level sensor and the first valve are both located above the water tank.

[0012] As a further improvement of this utility model, the liquid level tube is made of a transparent material.

[0013] As a further improvement of this utility model, a scale for identifying the liquid level is installed on the liquid level tube.

[0014] As a further improvement of this utility model, the liquid level display adopts a light bar liquid level display controller.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a liquid level sensor testing platform. By setting up a liquid level detection platform and a PLC operation platform, it can not only accurately test the 485 communication function of the liquid level sensor, but also compare the multi-channel output water level values ​​detected by the liquid level sensor with the actual water level value in the liquid level tube to test whether the output data of the liquid level sensor is accurate. The liquid level sensor can be calibrated accordingly to improve the factory quality of the liquid level sensor. Moreover, multiple liquid level sensors can be tested simultaneously to improve testing efficiency. In addition, the liquid level height of the liquid level tube can be easily adjusted to meet different liquid level testing needs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the liquid level sensor testing platform of this utility model;

[0017] Figure 2 This is a three-dimensional view of the liquid level sensor testing platform of this utility model after removing the PLC operating platform and the local liquid level tube.

[0018] Figure 3 This is a perspective view of the assembly of the liquid level sensor, the first tee connector, the measuring tube, and the second tee connector in this utility model.

[0019] Referring to the accompanying drawings, the following explanations are provided:

[0020] 1. Liquid level detection platform; 2. PLC operation platform; 3. Liquid level tube; 4. Measuring tube; 5. Water pump; 6. Liquid level sensor; 7. Touch screen all-in-one machine; 8. Liquid level display; 9. First tee connector; 10. First valve; 11. Second tee connector; 12. Second valve; 13. Water tank; 14. Drain pipe; 15. Cover plate; 1501. Water tank; 1502. Drain outlet; 16. Ruler. Detailed Implementation

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] See Figures 1 to 3 This utility model provides a liquid level sensor testing platform, including: a liquid level detection platform 1 and a PLC operation platform 2.

[0023] The liquid level detection platform 1 is equipped with a liquid level pipe 3, a measuring pipe 4, and a water pump 5. The liquid level pipe 3 is vertically oriented and has an internal cavity for storing liquid. The water pump 5 pumps liquid into the cavity to reach the specified liquid level. The measuring pipe 4 is horizontally oriented and connected to the liquid level pipe 3. The liquid level sensor 6 to be detected is installed on the measuring pipe 4. The liquid level sensor 6 indirectly measures the liquid level by measuring the static pressure of the liquid in the measuring pipe 4.

[0024] The liquid level sensor 6 to be tested in this invention has multiple signal output lines, including a 485 communication line and two analog output lines, namely a 0-5V analog output line and a 4-20mA analog output line.

[0025] Furthermore, the PLC operating platform 2 is equipped with a touch screen all-in-one machine 7 and two liquid level displays 8. The 485 communication line of the liquid level sensor 6 is connected to the touch screen all-in-one machine 7, and the display panel of the touch screen all-in-one machine 7 can directly display the water level value detected by the liquid level sensor 6 transmitted through the 485 communication line. The 0-5V analog output line and the 4-20mA analog output line of the liquid level sensor 6 are respectively connected to the two liquid level displays 8. The two liquid level displays 8 can process the analog data output by the liquid level sensor 6 and display it as the corresponding water level value.

[0026] Testers can compare the water level values ​​displayed on the touch screen 7 and the two level displays 8 with the actual water level value in the level tube 3 to determine whether the level sensor 6 is accurate in detecting the water level. When there is a deviation between the water level value detected by the touch screen 7 or the two level displays 8 and the actual water level value in the level tube 3, the corresponding output data can be calibrated by adjusting the corresponding potentiometer in the level sensor 6. Therefore, this utility model's level sensor testing platform can not only accurately test the 485 communication function of the level sensor 6, but also compare the water level value detected by the level sensor 6 with the actual water level value in the level tube 3 to test the accuracy of the output data of the level sensor 6, and make corresponding adjustments to improve the factory quality of the level sensor 6.

[0027] See Figure 3 A first tee connector 9 is provided in the middle of the measuring tube 4, and a first valve 10 is installed on the first tee connector 9. The liquid level sensor 6 is installed on the first valve 10. In this utility model, the liquid level sensor 6 is installed on the first valve 10. During testing, the first valve 10 is opened. After the test is completed, the first valve 10 is closed and the liquid level sensor 6 is removed so that other liquid level sensors 6 can be tested repeatedly.

[0028] It is worth mentioning that multiple first tee connectors 9 are provided in the middle of the measuring tube 4, and each first tee connector 9 is equipped with a first valve 10. A liquid level sensor 6 to be tested can be installed on each first valve 10 to test multiple liquid level sensors 6 simultaneously, thereby improving testing efficiency. Correspondingly, the touch screen all-in-one machine 7 and the liquid level display 8 are configured with multiple display areas to display the water level values ​​detected by multiple liquid level sensors 6 respectively.

[0029] See Figure 2 A support plate is fixed to one side of the liquid level detection platform 1, and the liquid level pipe 3 and water pump 5 are both mounted on the support plate. A water tank 13 is set at the bottom of the liquid level detection platform 1. The inlet of the water pump 5 is connected to the water tank 13 via an inlet pipe, and the outlet of the water pump 5 is connected to the liquid level pipe 3 via an outlet pipe. The water pump 5 is used to pump the liquid in the water tank 13 into the liquid level pipe 3. The inlet pipe and the outlet pipe are not shown in the figure.

[0030] Furthermore, a second tee connector 11 is provided on the level tube 3. The second tee connector 11 is a reducing tee. One end of the measuring tube 4 is connected to the second tee connector 11, and the other end of the measuring tube 4 is equipped with a second valve 12. The second valve 12 is connected to the water tank 13 via the drain pipe 14.

[0031] The liquid level sensor testing platform of this utility model can release the liquid in the liquid level tube 3 by opening the second valve 12 to adjust the liquid level height and meet different liquid level testing needs. The actual water level in the liquid level tube 3 can be easily adjusted as needed, and the liquid can be recycled.

[0032] In this embodiment, both the first valve 10 and the second valve 12 are brass ball valves.

[0033] In addition, a cover plate 15 is provided on the top of the liquid level detection platform 1, and the measuring tube 4 is placed on the cover plate 15. The cover plate 15 is provided with a water tank 1501, and a drain outlet 1502 is provided in the water tank 1501. The drain outlet 1502 is set downwards and directly facing the water tank 13. The liquid level sensor 6 and the first valve 10 are both located above the water tank 1501. After the liquid level sensor 6 has been tested, when the liquid level sensor 6 is removed from the first valve 10, the liquid remaining between the liquid level sensor 6 and the first valve 10 falls downwards into the water tank 1501 and leaks into the water tank 13 through the drain outlet 1502, preventing liquid from spilling into the test environment.

[0034] In this embodiment, the liquid level tube 3 is equipped with a cap at the bottom and an open top. The liquid level tube 3 is made of transparent material and is equipped with a scale 16 for identifying the liquid level so as to facilitate observation of the liquid level value in the liquid level tube 3.

[0035] Among them, the liquid level display 8 uses a light bar liquid level display controller, which is a conventional technology that can be purchased directly on the market.

[0036] Therefore, the liquid level sensor testing platform of this utility model, by setting up a liquid level detection platform 1 and a PLC operation platform 2, can not only accurately test the 485 communication function of the liquid level sensor 6, but also compare the multi-channel output water level values ​​detected by the liquid level sensor 6 with the actual water level value in the liquid level tube 3 to test whether the output data of the liquid level sensor 6 is accurate. It can also calibrate the liquid level sensor 6 accordingly to improve the factory quality of the liquid level sensor 6. Furthermore, it can test multiple liquid level sensors 6 simultaneously, improving testing efficiency. In addition, it can easily adjust the liquid level height of the liquid level tube 3 to meet different liquid level testing needs.

[0037] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A liquid level sensor testing platform, characterized in that, include: A liquid level detection platform (1) and a PLC operation platform (2) are provided. The liquid level detection platform (1) is equipped with a liquid level pipe (3), a measuring pipe (4) and a water pump (5). The liquid level pipe (3) is distributed vertically and has a container cavity for storing liquid inside. The water pump (5) is used to pump liquid into the container cavity and reach a specified liquid level. The measuring pipe (4) is distributed horizontally and connected to the liquid level pipe (3). The liquid level sensor (6) to be detected is set on the measuring pipe (4). The PLC operation platform (2) is equipped with a touch screen all-in-one machine (7) and a liquid level display (8). The liquid level sensor (6) is connected to a 485 communication line and an analog output line. The 485 communication line is connected to the touch screen all-in-one machine (7), and the analog output line is connected to the liquid level display (8). Both the touch screen all-in-one machine (7) and the liquid level display (8) can display the water level value detected by the liquid level sensor (6).

2. The liquid level sensor testing platform according to claim 1, characterized in that: The measuring tube (4) is provided with a first tee connector (9) in the middle, and a first valve (10) is installed on the first tee connector (9). The liquid level sensor (6) is installed on the first valve (10).

3. The liquid level sensor testing platform according to claim 2, characterized in that: Multiple first tee connectors (9) are provided, and each first tee connector (9) is equipped with a first valve (10).

4. The liquid level sensor testing platform according to claim 2, characterized in that: The liquid level tube (3) is provided with a second three-way connector (11), one end of the measuring tube (4) is connected to the second three-way connector (11), and the other end of the measuring tube (4) is equipped with a second valve (12).

5. The liquid level sensor testing platform according to claim 4, characterized in that: The bottom of the liquid level detection platform (1) is provided with a water tank (13), and the second valve (12) is connected to the water tank (13) via a drain pipe (14).

6. The liquid level sensor testing platform according to claim 5, characterized in that: The inlet of the water pump (5) is connected to the water tank (13) via an inlet pipe, and the outlet of the water pump (5) is connected to the level pipe (3) via an outlet pipe.

7. The liquid level sensor testing platform according to claim 5, characterized in that: The top of the liquid level detection platform (1) is provided with a cover plate (15), and a water tank (1501) is provided on the cover plate (15). A drain outlet (1502) is provided in the water tank (1501), and the drain outlet (1502) is set downwards and directly facing the water tank (13). The liquid level sensor (6) and the first valve (10) are both located above the water tank (1501).

8. The liquid level sensor testing platform according to claim 1, characterized in that: The liquid level tube (3) is made of transparent material.

9. The liquid level sensor testing platform according to claim 8, characterized in that: The liquid level tube (3) is equipped with a scale (16) for identifying the liquid level.

10. The liquid level sensor testing platform according to claim 1, characterized in that: The liquid level display (8) is a light bar liquid level display controller.

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