Flowmeter and correction method thereof

Abstract

The invention relates to a flow meter and a correction method thereof, the flow meter comprises a microcontroller, the microcontroller is electrically connected with a flow sensor, a correction key, a memory and a transistor, the microcontroller is a core component of the flow meter and is mainly responsible for controlling operation of the flow meter and performing correction calculation, the flow sensor is used for connecting a pipeline, and the correction key is electrically connected with the memory. The microcontroller is electrically connected with the microcontroller and can store real-time flow data, the correction key supports direct starting of a correction function, the memory can temporarily store corrected error values, and the microcontroller is further electrically connected with a display module and is mainly used for displaying relevant parameters, running states and fault detection of all assemblies of the flowmeter. The correction key is pressed to drive the microcontroller to calculate related data, so that the error value of the obtained flow data is less than 1%, and the purpose of easily completing correction can be achieved.

Description

Technical Field

[0001] The present invention relates to a flowmeter, and more particularly to a flowmeter and a calibration method thereof. Background Art

[0002] Currently, for the calibration method of commercially available flowmeters, corresponding error corrections usually need to be carried out during the calibration machine platform and the adjustment process of complex data tables. The main calibration methods can be mainly divided into the following several types:

[0003] I. Direct calibration method: A standard flow source is used to generate a fluid with a known flow rate, and by comparing and measuring it with the flowmeter to be calibrated, the error of the flowmeter to be calibrated is determined; this method is the most accurate calibration method, but it also requires a dedicated standard flow source, so the cost is relatively high.

[0004] II. Comparison method: A calibrated flowmeter is used to compare and measure with the flowmeter to be calibrated, so as to determine the error of the flowmeter to be calibrated. This method has the advantages of low cost and simple operation, but the calibration accuracy is lower than that of the aforementioned direct calibration method.

[0005] III. Recirculation method: The flowmeter to be calibrated is installed in a recirculation pipeline, and the fluid flows through the flowmeter to be calibrated and then flows back to the source. By measuring the flow rate of the fluid in the recirculation pipeline, the error of the flowmeter to be calibrated is determined. This method also has the advantages of simple operation and lower cost, but the calibration accuracy is even lower than the previous two methods.

[0006] IV. Calculation method: According to the theoretical principle of the flowmeter, by measuring the relevant parameters of the flowmeter, the error of the flowmeter to be calibrated is calculated. This method has low cost and simple operation, but the calibration accuracy is lower than the previous three methods.

[0007] Among the above four calibration methods, if the smallest calibration error is to be pursued, the direct calibration method is adopted. However, for the calibration of flowmeters of industrial products such as pneumatic cylinders, the calibration accuracy is usually not less than plus or minus 2%. Although the other three methods can effectively reduce the cost, their calibration accuracy becomes less accurate. If the calibration accuracy is to be maintained, a certain cost must be incurred. If the cost is to be reduced, the requirement for calibration accuracy must inevitably be reduced.

[0008] Currently, the calibration operation of commercially available flowmeters must be adjusted in a laboratory or during the production process. And during the process, some useful numerical operations must be recorded, and then the numerical values are manually input through an additional connected input device to achieve the calibration purpose. Although it can be accurately calibrated, it is not convenient for calibration at the actual processing site. Summary of the Invention

[0009] The main object of the present invention is to provide a flowmeter, which includes: a microcontroller electrically connected to a flow sensor, a calibration key, a memory, and a transistor. The flow sensor is used to connect to a pipeline and store real-time flow data. The calibration key is used to support direct start of calibration. The memory is used to temporarily store the corrected error value. The flow sensor connects to the pipeline to obtain a stable full-scale flow and a read flow. Pressing the calibration key drives the microcontroller to calculate the correction error for the full-scale flow and the read flow. When the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again.

[0010] Optionally, the microcontroller is also electrically connected to a display module, which is used to display the relevant parameters, operating status, and fault detection of each component of the flowmeter.

[0011] The present invention also provides a calibration method, which uses the flowmeter described in the present invention. The calibration method includes: a setting step of first obtaining the full-scale flow by connecting the flow sensor to the pipeline; a calibration step of pressing the calibration key to drive the flow sensor to obtain the read flow, and then transmitting the full-scale flow and the read flow data to the microcontroller for error correction and calculation. If the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again. Finally, the corrected value is updated again through the transistor for the application of the flowmeter.

[0012] The functions of the above components are as follows:

[0013] 1. Microcontroller: The core component of the flowmeter, mainly responsible for controlling the operation of the flowmeter and performing calibration calculations. It can read the data of the flow sensor, calculate the flow rate, perform calibration calculations, and store the corrected error value. The microcontroller is electrically connected to a display module.

[0014] 2. Flow sensor: A component for measuring the flow rate. Its type is not limited in the present invention. It is mainly used for measuring the flow rate and outputting flow data for application.

[0015] 3. Calibration key: A component for starting the calibration function. In addition to starting the calibration, it can also confirm the completion of the calibration.

[0016] 4. Memory: A component mainly used for temporarily storing the corrected error value, and can also store the corrected error value.

[0017] 5. Transistor: Used for prompting after the calibration is completed.

[0018] The flowmeter and its calibration method of the present invention are based on the comparison method, so that the error value of the obtained flow data is less than 1%, the accuracy can be improved without relying on a standard flow source, and only one-key operation is required to automatically calculate the error correction, without the need for manual data writing through an additional input device, so as to achieve the purpose of easy completion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a block diagram of the composition of the present invention.

[0020] Figure 2 It is a flowchart of the flow calibration of the present invention.

[0021] Figure 3 It is a schematic diagram of the actual operation steps of the flow calibration of the present invention.

[0022] Figure 4 Based on the present invention Figure 3 It is a schematic diagram of the actual operation steps.

[0023] Figure 5 It is a schematic diagram of the numerical definition before and after the calibration of the present invention.

[0024] The markings in the figure are as follows:

[0025] (10)... Microcontroller

[0026] (11)... Flow sensor

[0027] (12)... Calibration key

[0028] (13)... Memory

[0029] (14)... Transistor

[0030] (15)... Display module

[0031] (A)... Full-scale flow

[0032] (B)... Read flow DETAILED DESCRIPTION OF THE INVENTION

[0033] Generally according to the present invention, the best feasible embodiment, and in cooperation with Figures 1 to 4After the detailed description, the understanding of the present invention is increased. The present invention relates to a flowmeter, which includes: a microcontroller 10, which is electrically connected to a flow sensor 11, a calibration key 12, a memory 13, and a transistor 14. The microcontroller 10 is the core component of the flowmeter, mainly responsible for controlling the operation of the flowmeter and performing calibration calculations. The flow sensor 11 is used to connect to the pipeline and can store real-time flow data. The calibration key 12 supports directly starting the calibration function. The memory 13 can be used to temporarily store the corrected error values. And the microcontroller 10 is also electrically connected to a display module 15, which is mainly used to display the relevant parameters, operating status, and fault detection of each component of the flowmeter.

[0034] By connecting the pipeline with the flow sensor 11, a full-scale flow rate A and a read flow rate B are obtained. Pressing the calibration key 12 drives the microcontroller 10 to calculate the correction error for the full-scale flow rate A and the read flow rate B. When the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again until the error can finally be made < 1%.

[0035] From the above structural features, it can be known that the calibration method of the present invention is a comparison method. Although it does not require the use of a standard flow source, a stable full-scale flow rate is still required as a basic value. Based on the comparison method, the error value of the obtained flow data is made less than 1%, so that its accuracy can be improved without relying on a standard flow source. And only by pressing the calibration key 12 to drive the microcontroller 10 to calculate the relevant data, the purpose of calibration can be easily completed.

[0036] Please refer to again Figures 3 to 4 , for the flowmeter calibration method of the present invention, its calibration process includes: (S1) First, obtain the full-scale flow rate A by connecting the pipeline with the flow sensor 11;

[0037] (S2) Then, press the calibration key 12 to drive the flow sensor 11 again to obtain the read flow rate B. Then, transfer the data of the full-scale flow rate A and the read flow rate B to the microcontroller 10 for error correction and calculation. If the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again. Finally, the calibrated value is updated again by the transistor 14 for the application of the flowmeter, that is, a prompt will be further made after the calibration is completed.

[0038] Please refer to again Figure 4For the upper half dashed-line box, the stable full-scale flow rate A data is measured by the previous step (S1), and it can be seen that the unit of the obtained data is 100.5. Continuing with step (S2), the flow rate B is read again as 95.1 units, and its error range is greater than 5%. Therefore, the correction key 12 is directly pressed to correct the data. The error is corrected and calculated by the microcontroller 10. If the error < 1%, the correction is completed. If the error > 1%, the correction is performed again. It can be seen that the corrected data reaches 99.7, and its error range is already < 1%. Therefore, after the correction is completed, the corrected value is updated again through the transistor 14 for use by the flowmeter, and it is also used to indicate that the correction has been completed; in cooperation with the previous correction description and Figure 5 As shown, the relevant numerical definitions are coordinated with the states before and after correction, and it can be clearly understood that the present invention mainly uses the microcontroller 10 to perform calculations and corrections by means of the correction amount, and the corrected value is finally displayed through the display module 15. In this way, there is no need to perform corrections by traditional means, and corrections can be made on-site with just one key.

[0039] In summary, for the flowmeter correction method of the present invention, by reducing the error value and repeatedly detecting relevant values until the error range is reached, the correction is considered completed. Compared with the traditional method that requires cumbersome environmental settings of a standard flow source and manual input of correction values, the present invention can be completed with just one key by pressing the correction key 12, and the relevant states during the setting and detection processes can also be fully displayed through the display module 15, greatly reducing the complexity during the correction and use processes.

Claims

1. A flowmeter, comprising: a microcontroller (10) electrically connected to a flow sensor (11), a calibration key (12), a memory (13), and a transistor (14). The flow sensor (11) is used to connect to a pipeline and store real-time flow data. The calibration key (12) is used to support direct start of calibration. The memory (13) is used to temporarily store the corrected error value. Characterized in that: The flow sensor (11) obtains a stable full-scale flow rate (A) and a read flow rate (B) through the connected pipeline. Pressing the calibration key (12) drives the microcontroller (10) to calculate the correction error for the full-scale flow rate (A) and the read flow rate (B). When the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again.

2. The flowmeter according to claim 1, Characterized in that, The microcontroller (10) is also electrically connected to a display module (15) for displaying relevant parameters, operating status, and fault detection of each component of the flowmeter.

3. A calibration method, Characterized in that, Using the flowmeter according to claim 1, the calibration method includes: a setting step of first obtaining the full-scale flow rate (A) by connecting the flow sensor (11) to the pipeline; a calibration step of pressing the calibration key (12) to drive the flow sensor (11) to obtain the read flow rate (B), and then transmitting the data of the full-scale flow rate (A) and the read flow rate (B) to the microcontroller (10) for error correction and calculation. If the error < 1%, the calibration is completed. If the error > 1%, the calibration is performed again. Finally, the value of the completed calibration is updated again through the transistor (14) for application by the flowmeter.

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