Flow monitoring device and system

Abstract

The utility model discloses a flow monitoring device and a flow monitoring system, which relate to the technical field of electrical equipment maintenance, and are characterized in that a first display device is used for displaying a second flow value expected to be received by a flow computer and a third flow value actually received by the flow computer; whether the data acquisition accuracy of the flow computer is qualified or not can be accurately verified by comparing whether the second flow value is equal to the third flow value or not; similarly, the first display device further displays a fourth flow value expected to be output by the flow computer, the universal meter can display a fifth flow value actually output by the flow computer, and whether the data output accuracy of the flow computer is qualified or not can be accurately verified by comparing whether the fourth flow value is equal to the fifth flow value or not; in addition, according to the scheme, whether the flow computer successfully receives the flow value transmitted by the flow sensor or not and whether the universal meter successfully receives the flow value transmitted by the flow computer or not can accurately verify whether the equipment function of the flow computer has a fault or not.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment maintenance technology, and in particular to a flow monitoring device and system. Background Technology

[0002] A flow computer is a specialized device designed to measure and calculate the flow rate of fluids or gases in real time, ensuring accurate data capture and control of industrial processes. Some of the most well-known types include single-run, multi-run, and hybrid systems, often used in conjunction with advanced software solutions to achieve accurate volumetric or mass-based calculations.

[0003] Because flow meters need to capture data accurately, according to the standards and requirements of the production process, it is necessary to perform equipment function tests and data acquisition and output accuracy tests on flow meters in addition to appearance inspection. However, existing testing devices can only detect whether the data output function of the flow meter is accurate by comparing whether the expected flow value received by the flow meter is consistent with the actual flow value output by the flow meter. They cannot test the accuracy of data acquisition. Therefore, there is an urgent need for a testing device that can accurately test the equipment function of the flow meter and the accuracy of data acquisition and transmission. Utility Model Content

[0004] The purpose of this invention is to provide a flow monitoring device and system. This solution uses a first display device to display the second flow value expected to be received by the flow computer and the third flow value actually received by the flow computer. By comparing whether the second and third flow values ​​are equal, the accuracy of the flow computer's data acquisition can be accurately verified. Similarly, the first display device also displays the fourth flow value expected to be output by the flow computer, while the multimeter displays the fifth flow value actually output by the flow computer. By comparing whether the fourth and fifth flow values ​​are equal, the accuracy of the flow computer's data output can be accurately verified. Furthermore, this solution can accurately verify whether the flow computer's device function is faulty by checking whether the flow computer successfully receives the flow value transmitted by the flow sensor and whether the multimeter successfully receives the flow value transmitted by the flow computer.

[0005] To solve the above-mentioned technical problems, this utility model provides a flow monitoring device, including: a flow sensor, a multimeter, and a first display device;

[0006] The acquisition end of the flow sensor is connected to the device under test, and the output end is connected to the flow signal input end of the flow computer, for acquiring the first flow value of the device under test;

[0007] The first display device is connected to the flow computer and the flow sensor respectively, and is used to display the first flow value, the second flow value expected to be output by the device under test, the third flow value actually received by the flow computer, and the fourth flow value expected to be output by the flow computer.

[0008] The multimeter is connected to the output terminal of the flow computer and is used to display the fifth flow value actually output by the flow computer.

[0009] Optional, also includes:

[0010] A first switch, the first end of which is connected to the device under test, and the second end of which is connected to the acquisition end of the flow sensor;

[0011] The second switch has a first end connected to the device under test and a second end connected to the acquisition end of the pressure sensor.

[0012] The pressure sensor, the output of which is connected to the pressure signal receiving end of the flow computer, is used to collect the first pressure value of the device under test when the first switch is open and the second switch is closed.

[0013] Accordingly, the flow computer is also configured to: receive the second pressure value actually output by the pressure sensor;

[0014] The multimeter is also used to: display the sixth flow rate value actually output by the flow computer based on the second pressure value;

[0015] The first display device is also connected to the pressure sensor and is further configured to: display the sixth flow rate value expected to be output by the flow sensor when the first switch is closed and the second switch is open; and display the first pressure value, the second pressure value, the third pressure value expected to be output by the pressure sensor, and the seventh flow rate value expected to be output by the flow computer based on the second pressure value when the first switch is open and the second switch is closed.

[0016] Optional, also includes:

[0017] The third switch has its first end connected to the device under test and its second end connected to the acquisition end of the temperature sensor.

[0018] The temperature sensor, whose output terminal is connected to the temperature signal receiving terminal of the flow computer, is used to collect the first temperature value of the resistor box when the first switch is open, the second switch is open, and the third switch is closed.

[0019] The resistance box is located at a preset distance from the device under test;

[0020] Accordingly, the flow computer is also configured to: receive the second temperature value actually output by the temperature sensor;

[0021] The multimeter is also used to: display the eighth flow rate value actually output by the flow computer based on the second temperature value;

[0022] The first display device is also connected to the temperature sensor and is further configured to: display the first temperature value, the second temperature value, the third temperature value expected to be output by the temperature sensor, and the ninth flow rate value expected to be output by the flow computer based on the second temperature value when the first switch is open, the second switch is open, and the third switch is closed.

[0023] Optionally, the first display device is a display device including a touch screen, and the display device further includes a processing chip. The display device including the touch screen is connected to the flow computer and the flow sensor respectively, and is used to display the first flow value, the second flow value expected to be output by the device under test, the third flow value actually received by the flow computer, and the fourth flow value expected to be output by the flow computer through the touch screen.

[0024] Optional, also includes:

[0025] A processor, connected to the communication interface of the flow computer, is used to determine the measurement error value of the flow computer based on the fifth flow value and the fourth flow value.

[0026] Optional, also includes:

[0027] A second display device, connected to the processor, is used to display the measurement error value.

[0028] Optional, also includes:

[0029] A signal amplifier, the input of which is connected to the communication interface of the flow computer, and the output of which is connected to the processor.

[0030] Optional, also includes:

[0031] An alarm device, connected to the processor, is used to issue a corresponding alarm when the measurement error value is greater than a preset error value threshold.

[0032] Optionally, the alarm device is an audible alarm device and / or a display alarm device, which is connected to the processor and is used to issue a corresponding audible alarm and / or display alarm when the measurement error value is greater than the preset error value threshold.

[0033] To solve the above-mentioned technical problems, this utility model also provides a flow monitoring system, including: a flow computer and a flow monitoring device as described above, wherein the flow computer is connected to the flow monitoring device.

[0034] The purpose of this invention is to provide a flow monitoring device and system. This solution uses a first display device to display the second flow value expected to be received by the flow computer and the third flow value actually received by the flow computer. By comparing whether the second and third flow values ​​are equal, the accuracy of the flow computer's data acquisition can be accurately verified. Similarly, the first display device also displays the fourth flow value expected to be output by the flow computer, while the multimeter displays the fifth flow value actually output by the flow computer. By comparing whether the fourth and fifth flow values ​​are equal, the accuracy of the flow computer's data output can be accurately verified. Furthermore, this solution can accurately verify whether the flow computer's device function is faulty by checking whether the flow computer successfully receives the flow value transmitted by the flow sensor and whether the multimeter successfully receives the flow value transmitted by the flow computer. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of a flow monitoring device provided by this utility model;

[0037] Figure 2 A schematic diagram of another flow monitoring device provided by this utility model. Detailed Implementation

[0038] The core of this utility model is to provide a flow monitoring device and system. This solution uses a first display device to display the second flow value expected to be received by the flow computer and the third flow value actually received by the flow computer. By comparing whether the second and third flow values ​​are equal, the accuracy of the flow computer's data acquisition can be accurately verified. Similarly, the first display device also displays the fourth flow value expected to be output by the flow computer, while the multimeter displays the fifth flow value actually output by the flow computer. By comparing whether the fourth and fifth flow values ​​are equal, the accuracy of the flow computer's data output can be accurately verified. Furthermore, this solution can accurately verify whether the flow computer's device function is faulty by checking whether the flow computer successfully receives the flow value transmitted by the flow sensor and whether the multimeter successfully receives the flow value transmitted by the flow computer.

[0039] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] Please refer to Figure 1 , Figure 1 A schematic diagram of a flow monitoring device provided by this utility model. The flow monitoring device includes: a flow sensor 1, a multimeter 2, and a first display device 3;

[0041] The acquisition end of flow sensor 1 is connected to the device under test, and the output end is connected to the flow signal input end of the flow computer, which is used to acquire the first flow value of the device under test;

[0042] The first display device 3 is connected to the flow computer and the flow sensor 1 respectively, and is used to display the first flow value, the second flow value expected to be output by the device under test, the third flow value actually received by the flow computer, and the fourth flow value expected to be output by the flow computer.

[0043] Multimeter 2 is connected to the output terminal of the flow meter to display the fifth flow value actually output by the flow meter.

[0044] In this invention, considering that existing flow monitoring devices can only detect whether the data output accuracy of the flow computer is up to standard, but cannot detect whether the device function and data acquisition accuracy of the flow computer are up to standard, the flow monitoring device provided in this solution must simultaneously realize the above three functions. Specifically, the flow monitoring device provided in this solution includes a first display device 3 and a multimeter 2. The first display device 3 displays the second flow value expected to be received by the flow computer and the third flow value actually received by the flow computer. By comparing whether the second and third flow values ​​are equal, the accuracy of the flow computer's data acquisition can be accurately verified. Similarly, the first display device 3 also displays the fourth flow value expected to be output by the flow computer, while the multimeter 2 displays the fifth flow value actually output by the flow computer. By comparing whether the fourth and fifth flow values ​​are equal, the accuracy of the flow computer's data output can be accurately verified. This solution can accurately verify whether the device function of the flow computer is faulty by whether the flow computer successfully receives the flow value transmitted by the flow sensor 1 and whether the multimeter 2 successfully receives the flow value transmitted by the flow computer. Furthermore, the first display device 3 can also display the first flow rate value collected by the flow sensor 1 and the second flow rate value expected to be received by the flow computer. The second flow rate value is also the flow rate value expected to be output by the flow sensor 1. Therefore, by comparing whether the first flow rate value and the second flow rate value are equal, it can be determined whether the data output accuracy of the flow sensor 1 is qualified. Therefore, the flow monitoring device provided by this solution not only has three detection functions—detecting whether the data output accuracy of the flow computer is qualified, detecting the device function of the flow computer, and detecting whether the data acquisition accuracy is qualified—but also has the function of detecting whether the data output accuracy of the flow sensor 1 is qualified, which can ensure the accuracy of the flow data acquisition and transmission process.

[0045] This embodiment provides a flow monitoring device. The solution uses a first display device 3 to display the second flow value expected to be received by the flow computer and the third flow value actually received by the flow computer. By comparing whether the second and third flow values ​​are equal, the accuracy of the flow computer's data acquisition can be accurately verified. Similarly, the first display device 3 also displays the fourth flow value expected to be output by the flow computer, while the multimeter 2 displays the fifth flow value actually output by the flow computer. By comparing whether the fourth and fifth flow values ​​are equal, the accuracy of the flow computer's data output can be accurately verified. Furthermore, this solution can accurately verify whether the flow computer's device function is faulty by checking whether the flow computer successfully receives the flow value transmitted by the flow sensor 1 and whether the multimeter 2 successfully receives the flow value transmitted by the flow computer.

[0046] Based on the above embodiments:

[0047] As an optional embodiment, it also includes:

[0048] The first switch has its first end connected to the device under test and its second end connected to the acquisition end of the flow sensor 1.

[0049] The second switch has its first end connected to the device under test and its second end connected to the acquisition end of the pressure sensor 4.

[0050] Pressure sensor 4, the output end of pressure sensor 4 is connected to the pressure signal receiving end of flow computer, and is used to collect the first pressure value of the device under test when the first switch is open and the second switch is closed.

[0051] Correspondingly, the flow computer is also used to: receive the second pressure value actually output by the pressure sensor 4;

[0052] Multimeter 2 is also used to: display the sixth flow rate value actually output by the flow computer based on the second pressure value;

[0053] The first display device 3 is also connected to the pressure sensor 4 and is further used to: display the sixth flow value expected to be output by the flow sensor 1 when the first switch is closed and the second switch is open; and display the first pressure value, the second pressure value, the third pressure value expected to be output by the pressure sensor 4, and the seventh flow value expected to be output by the flow computer based on the second pressure value when the first switch is open and the second switch is closed.

[0054] In this invention, considering that the flow sensor 1 may malfunction during actual operation, the first flow value of the device under test collected by the flow sensor 1 will be inaccurate. Furthermore, since existing solutions generally do not perform fault detection on the flow sensor 1, this solution needs to ensure that the flow computer can still accurately detect the flow value of the device under test when the flow sensor 1 malfunctions. Moreover, because the flow value of the device under test corresponds to its pressure value, this solution also includes a pressure sensor 4 for collecting the pressure value of the device under test. In addition, since both the pressure sensor 4 and the flow sensor 1 can enable the flow computer to determine the flow value of the device under test, but in actual working environments, only the pressure sensor 4 or only the flow sensor 1 may exist, and to appropriately improve the working efficiency of the flow computer and appropriately reduce its computational load, this solution also includes a first switch corresponding to the flow sensor 1 and a second switch corresponding to the pressure sensor 4. By controlling the switches corresponding to the two sensors, it can be ensured that only one sensor works at any given time. For example, when the first switch is closed and the second switch is open, only the flow sensor 1 works; conversely, when the first switch is open and the second switch is closed, only the pressure sensor 4 works. Furthermore, when pressure sensor 4 is working, the flow computer will also calculate the corresponding seventh flow value based on the second pressure value actually output by pressure sensor 4. At this time, the first display device 3 can display the first pressure value collected by pressure sensor 4, the second pressure value actually received by the flow computer, the third pressure value expected to be received by the flow computer, the seventh flow value expected to be output by the flow computer based on the second pressure value, and the sixth flow value actually output by the flow computer. Then, by comparing whether the sixth flow value displayed by multimeter 2 is equal to the seventh flow value displayed by the first display device 3, the accuracy of the flow computer's data output can be verified. Similarly, by comparing whether the second pressure value is equal to the third pressure value, the accuracy of the flow computer's data acquisition can be verified. In addition, by comparing whether the first pressure value is equal to the second pressure value, the accuracy of the pressure sensor 4's data output can be verified. Ideally, if there are no errors in pressure sensor 4, flow sensor 1, and flow computer, the flow value corresponding to the pressure value collected by pressure sensor 4 can be compared horizontally with the flow value collected by flow sensor 1 to determine whether the flow value acquisition is accurate, so as to ensure the accuracy of the flow data acquisition and transmission process.

[0055] As an optional embodiment, it also includes:

[0056] The third switch has its first end connected to the device under test and its second end connected to the acquisition end of the temperature sensor 5.

[0057] Temperature sensor 5, the output of temperature sensor 5 is connected to the temperature signal receiving end of the flow computer, and is used to collect the first temperature value of the resistor box when the first switch is open, the second switch is open and the third switch is closed.

[0058] A resistance box positioned at a preset distance from the device under test;

[0059] Correspondingly, the flow computer is also used to: receive the second temperature value actually output by the temperature sensor 5;

[0060] Multimeter 2 is also used to: display the eighth flow rate value actually output by the flow computer based on the second temperature value;

[0061] The first display device 3 is also connected to the temperature sensor 5 and is further used to display the first temperature value, the second temperature value, the third temperature value expected to be output by the temperature sensor 5, and the ninth flow rate value expected to be output by the flow computer based on the second temperature value when the first switch is open, the second switch is open, and the third switch is closed.

[0062] In this invention, considering that the flow sensor 1 may malfunction during actual operation, the initial flow value of the device under test collected by the flow sensor 1 will be inaccurate. Furthermore, since existing solutions generally do not perform fault detection on the flow sensor 1, this solution needs to ensure that the flow computer can still accurately detect the flow value of the device under test when the flow sensor 1 malfunctions. Moreover, because the flow value of the device under test corresponds to its temperature value, this solution also includes a temperature sensor 5 and a resistance box. The temperature sensor 5 collects the temperature value of the resistance box and thus the temperature value of the device under test, thereby ensuring that the flow computer can determine the flow value of the device under test based on the collected temperature value. In addition to the flow rate value of the device, since both temperature sensor 5 and flow sensor 1 can enable the flow computer to determine the flow rate value of the device under test, in actual working environments, only temperature sensor 5 or only flow sensor 1 may exist. In order to appropriately improve the working efficiency of the flow computer and appropriately reduce the computational load of the flow computer, this solution also sets a third switch corresponding to temperature sensor 5. By controlling the switches corresponding to the two sensors, it can be ensured that only one sensor works at the same time. For example, when the first switch is closed and the third switch is open, only flow sensor 1 works; conversely, when the first switch is open and the third switch is closed, only temperature sensor 5 works. Furthermore, when temperature sensor 5 is working, the flow computer will also calculate the corresponding eighth flow value based on the second temperature value actually output by temperature sensor 5. At this time, the first display device 3 can display the first temperature value, the second temperature value, the third temperature value expected to be output by temperature sensor 5, and the ninth flow value expected to be output by the flow computer based on the second temperature value. Then, by comparing whether the sixth flow value displayed by multimeter 2 is equal to the ninth flow value displayed by the first display device 3, the accuracy of the flow computer's data output can be verified. Similarly, by comparing whether the second temperature value is equal to the third temperature value, the accuracy of the flow computer's data acquisition can be verified. In addition, by comparing whether the first temperature value is equal to the second temperature value, the accuracy of the temperature sensor 5's data output can be verified. Ideally, if there are no errors in temperature sensor 5, flow sensor 1, and flow computer, the flow value corresponding to the temperature value collected by temperature sensor 5 can be compared horizontally with the flow value collected by flow sensor 1 to determine whether the flow value acquisition is accurate, so as to ensure the accuracy of the flow data acquisition and transmission process.

[0063] It should be noted that this solution has the following key technical aspects:

[0064] (1) The components of the flow monitoring device include: 1. Flow computer, 2. Standard resistance box and temperature sensor 5, 3. Pressure sensor 4, 4. Flow sensor 1, 5. Multimeter 2, 6. Communication computer (processor 6) and signal cable, such as Figure 2 As shown.

[0065] (2) Technical requirements for the implementation of the flow monitoring device: 1. Standard resistance box, temperature sensor 5, pressure sensor 4, flow sensor 1, digital multimeter 2, as standard measuring instruments, the measurement accuracy must be higher than that of the flow computer, must be periodically calibrated and within the qualified period, and the range and speed settings must be correct; 2. The signal cable shall be made according to the electrical specifications of the communication interface, and the connectors shall be able to connect tightly; 3. The communication computer shall be equipped with data acquisition software; 4. According to Figure 2 Connect all devices, then power on and start the devices; 5. Perform functional tests on the flow computer: check if the power-on display is normal; check if the measured value changes with the input signal; check if the output signal changes with the input signal; check if the communication computer can acquire the signal; check if the acquired signal changes with the input signal; 6. Calibrate the flow computer using the 5-point calibration method to simulate normal operating conditions, namely zero point, one-quarter range, one-half range, three-quarter range, and full scale. ① For the Pt100 temperature signal, refer to the corresponding resistance value in the scale table according to the Pt range specified by the flow computer, set the input, i.e., temperature sensor 5 collects the temperature value of the resistance box, the flow computer will determine the resistance value of the resistance box based on the temperature value, and determine the corresponding flow value of the device under test based on the resistance value; ② For the 4~20mA input signal, for example: set the input according to 4mA, 8mA, 12mA, 16mA, 20mA respectively, read the measurement reading of the flow computer, read the output reading of digital multimeter 2, read the acquisition signal reading of the communication computer, and record it; 7. Calculate and judge the measurement accuracy error of the flow computer: calculate the 5 standard values ​​according to the measurement range of the flow computer; calculate the measurement indication error of the flow computer; error calculation formula = (indication value - standard value) / measurement range * 100%; calculate the output signal indication error; calculate the acquisition signal indication error. 8. Adjust the flow computer parameters according to the indication error so that the indication error is within the accuracy range of the flow computer. 9. Fill in the flow computer calibration certificate.

[0066] It should also be noted that calibration should be performed using the 5-point calibration method to simulate normal operating conditions, namely zero point, one-quarter range, one-half range, three-quarter range, and full scale; after inputting the analog signal, do not read the value immediately, hold it for 30 seconds before reading the value and changing the analog value to ensure measurement results; the signal cable should not be plugged or unplugged while energized.

[0067] As an optional embodiment, the first display device 3 is a display device including a touch screen. The display device further includes a processing chip. The display device including the touch screen is connected to the flow computer and the flow sensor 1 respectively, and is used to display a first flow value, a second flow value expected to be output by the device under test, a third flow value actually received by the flow computer, and a fourth flow value expected to be output by the flow computer through the touch screen.

[0068] In this invention, considering that the first display device 3 needs to display the first flow rate value, the second flow rate value expected to be output by the device under test, the third flow rate value actually received by the flow computer, and the fourth flow rate value expected to be output by the flow computer, and that the purpose of this solution is to test whether the data output accuracy of the flow computer is qualified, and to test whether the device function and data acquisition accuracy of the flow computer are qualified, it is necessary to compare each displayed flow rate value separately. In order to facilitate the comparison of each flow rate value, this solution uses a display device including a touch screen as the first display device 3, and the display device also includes a processing chip. Therefore, the user can operate the touch screen to select the corresponding flow rate value for comparison according to the function to be verified, which is more convenient for the user to operate and use.

[0069] As an optional embodiment, it also includes:

[0070] Processor 6 is connected to the communication interface of the flow computer and is used to determine the measurement error value of the flow computer based on the fifth flow value and the fourth flow value.

[0071] In this invention, considering that the premise for ensuring the normal operation of the flow meter is that the measurement error of the flow meter needs to be within the standard accuracy range, it is necessary to monitor the measurement error value of the flow meter in real time. This solution adds a processor 6 to determine the measurement error value of the flow meter in real time based on the fifth flow value and the fourth flow value. Users can judge whether the current parameters of the flow meter are standard based on the calculated measurement error value. For example, if the measurement error value exceeds the standard accuracy range or is greater than the preset error value threshold, it proves that the parameters of the flow meter need to be adjusted so that the measurement error value is within the standard accuracy range, thereby improving the reliability of the flow meter detection.

[0072] As an optional embodiment, it also includes:

[0073] The second display device, which is connected to the processor 6, is used to display the measurement error value.

[0074] In this invention, since the measurement error value of the flow computer is related to whether the flow computer parameters are standard, it is necessary to promptly inform the user or maintenance personnel of the calculated measurement error value. Therefore, this solution adds a second display device to display the measurement error value, which can not only be seen by the user or maintenance personnel in a timely manner, but also facilitate comparison by the user or maintenance personnel.

[0075] It should be noted that in practical applications, in order to save costs and size, the first display device 3 can be selected to display the measurement error value.

[0076] As an optional embodiment, it also includes:

[0077] The signal amplifier has its input end connected to the communication interface of the flow computer and its output end connected to the processor 6.

[0078] In this invention, considering that the signal transmitted by the flow computer may be less accurate due to environmental factors when the flow computer communicates with the processor 6, this solution adds a signal amplifier to amplify the signal transmitted from the flow computer to the processor 6, thereby improving the accuracy of the measurement error value determination process.

[0079] As an optional embodiment, it also includes:

[0080] An alarm device is connected to the processor 6 and is used to issue a corresponding alarm when the measurement error value exceeds a preset error value threshold.

[0081] In this solution, because the measurement error value of the flow meter is related to whether the flow meter parameters are standardized, and when the measurement error value exceeds the preset error threshold, it is necessary to promptly remind users or maintenance personnel to adjust the flow meter parameters, this solution adds an alarm device. When the measurement error value exceeds the preset error threshold, it indicates that the flow meter parameters need to be adjusted, and the alarm device will issue a corresponding alarm to remind users or maintenance personnel to adjust the flow meter parameters in a timely manner, thereby improving the reliability of the solution.

[0082] It should be noted that in practical applications, multiple warning levels can be set based on the magnitude of the flow error exceeding a preset error threshold. For example, when the calculated flow error reaches the first warning level, the first warning measure is activated. This first warning measure can be a corresponding audible or visual alarm. For instance, the first warning measure can be a warning text displayed in the alarm, showing a prominent text prompt on the display panel with a high-resolution color and size to ensure the operator can clearly see it under any circumstances. Furthermore, the first warning measure can also use a strongly flashing red warning light for alerting the operator. This light color has extremely high visual impact and can quickly attract the operator's attention. The flashing frequency can be set to a high value to enhance the sense of urgency. Additionally, the first warning measure can also use a specific alarm sound (which can be set by system default or user-defined) emitted from the external or built-in audio system of the flow monitoring device. The timbre and volume of this alarm sound need to be clearly distinguishable from other normal prompts and must remain clearly identifiable even when the flow computer is operating in a noisy environment, enabling the operator to perceive the urgency of the situation.

[0083] As an optional embodiment, the alarm device is an audible alarm device and / or a display alarm device, which is connected to the processor 6 and is used to issue a corresponding audible alarm and / or display alarm when the measurement error value is greater than a preset error value threshold.

[0084] In this invention, considering that both audible and visual alarms can promptly alert users or maintenance personnel to faults, the alarm device used in this solution is an audible alarm device and / or a visual alarm device. When the measurement error value exceeds a preset error threshold, a corresponding audible alarm and / or visual alarm is issued to remind users or maintenance personnel to adjust the parameters of the flow computer in a timely manner, thereby improving the reliability of the solution.

[0085] This utility model also provides an embodiment of a flow monitoring system, including: a flow computer and a flow monitoring device as described above, wherein the flow computer is connected to the flow monitoring device.

[0086] The flow monitoring system provided in this embodiment corresponds to the flow monitoring device described above, and therefore has the same beneficial effects as the flow monitoring device described above. Therefore, for the embodiment of the flow monitoring system, please refer to the description of the embodiment of the flow monitoring device, which will not be repeated here.

[0087] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flow monitoring device, characterized in that, include: Flow sensor, multimeter, first display device; The acquisition end of the flow sensor is connected to the device under test, and the output end is connected to the flow signal input end of the flow computer, for acquiring the first flow value of the device under test; The first display device is connected to the flow computer and the flow sensor respectively, and is used to display the first flow value, the second flow value expected to be output by the device under test, the third flow value actually received by the flow computer, and the fourth flow value expected to be output by the flow computer. The multimeter is connected to the output terminal of the flow computer and is used to display the fifth flow value actually output by the flow computer.

2. The flow monitoring device as described in claim 1, characterized in that, Also includes: A first switch, the first end of which is connected to the device under test, and the second end of which is connected to the acquisition end of the flow sensor; The second switch has a first end connected to the device under test and a second end connected to the acquisition end of the pressure sensor. The pressure sensor, the output of which is connected to the pressure signal receiving end of the flow computer, is used to collect the first pressure value of the device under test when the first switch is open and the second switch is closed. Accordingly, the flow computer is also configured to: receive the second pressure value actually output by the pressure sensor; The multimeter is also used to: display the sixth flow rate value actually output by the flow computer based on the second pressure value; The first display device is also connected to the pressure sensor and is further configured to: display the sixth flow rate value expected to be output by the flow sensor when the first switch is closed and the second switch is open; and display the first pressure value, the second pressure value, the third pressure value expected to be output by the pressure sensor, and the seventh flow rate value expected to be output by the flow computer based on the second pressure value when the first switch is open and the second switch is closed.

3. The flow monitoring device as described in claim 2, characterized in that, Also includes: The third switch has its first end connected to the device under test and its second end connected to the acquisition end of the temperature sensor. The temperature sensor, whose output terminal is connected to the temperature signal receiving terminal of the flow computer, is used to collect the first temperature value of the resistor box when the first switch is open, the second switch is open, and the third switch is closed. The resistance box is located at a preset distance from the device under test; Accordingly, the flow computer is also configured to: receive the second temperature value actually output by the temperature sensor; The multimeter is also used to: display the eighth flow rate value actually output by the flow computer based on the second temperature value; The first display device is also connected to the temperature sensor and is further configured to: display the first temperature value, the second temperature value, the third temperature value expected to be output by the temperature sensor, and the ninth flow rate value expected to be output by the flow computer based on the second temperature value when the first switch is open, the second switch is open, and the third switch is closed.

4. The flow monitoring device as described in claim 1, characterized in that, The first display device is a display device including a touch screen. The display device further includes a processing chip. The display device including the touch screen is connected to the flow computer and the flow sensor respectively, and is used to display the first flow value, the second flow value expected to be output by the device under test, the third flow value actually received by the flow computer, and the fourth flow value expected to be output by the flow computer through the touch screen.

5. The flow monitoring device according to any one of claims 1 to 4, characterized in that, Also includes: A processor, connected to the communication interface of the flow computer, is used to determine the measurement error value of the flow computer based on the fifth flow value and the fourth flow value.

6. The flow monitoring device as described in claim 5, characterized in that, Also includes: A second display device, connected to the processor, is used to display the measurement error value.

7. The flow monitoring device as described in claim 5, characterized in that, Also includes: A signal amplifier, the input of which is connected to the communication interface of the flow computer, and the output of which is connected to the processor.

8. The flow monitoring device as described in claim 5, characterized in that, Also includes: An alarm device, connected to the processor, is used to issue a corresponding alarm when the measurement error value is greater than a preset error value threshold.

9. The flow monitoring device as described in claim 8, characterized in that, The alarm device is an audible alarm device and / or a display alarm device. The audible alarm device and / or the display alarm device are connected to the processor and are used to issue a corresponding audible alarm and / or display alarm when the measurement error value is greater than the preset error value threshold.

10. A flow monitoring system, characterized in that, include: The flow computer and the flow monitoring device as described in any one of claims 1 to 9, wherein the flow computer is connected to the flow monitoring device.

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