A high-speed metering output control method and control system with precise compensation function

Abstract

The present invention provides a high-speed metering output control method and control system with precise compensation function, the method comprises the steps: S1: determining target weight M, low-speed expected weight LM and high-speed expected weight HM; S2: performing output of high-speed dynamic calibration phase to obtain high-speed calibration parameter value HC; S3: calculating high-speed conventional output HQ according to high-speed calibration parameter value HC, and performing high-speed conventional output, if high-speed output weight HW does not reach high-speed expected weight HM, continue high-speed conventional output; otherwise recalculate low-speed expected weight LM of low-speed output device; S4: performing output of low-speed dynamic calibration phase to obtain high-speed calibration parameter value LC; S5: calculating low-speed conventional output LQ according to low-speed calibration parameter value LC, and performing low-speed conventional output, if high-speed and low-speed output weight LW does not reach target weight M, continue low-speed conventional output, otherwise complete filling. The present invention enables material to achieve high-speed output, can achieve high precision, and the different output speeds of two-way output devices can quickly achieve output, reduce output time, and improve efficiency.

Description

Technical Field

[0001] The invention relates to a precision metering output system, and in particular to a high-speed metering output control method and control system with a precise compensation function. Background Art

[0002] At present, in the application of precise metering output of materials (liquids or powders), the common method is that the materials are output through a controllable device of a pump or valve. The controllable device has a controllable output action, such as a pump has a minimum rotation angle that can be controlled, and a valve has a minimum opening time that can be controlled. The precise metering output of the material is achieved by controlling the output device. Furthermore, the output amount of the controllable output action depends on the passage caliber of the controllable output device. The change in the caliber determines the output speed and controllable accuracy. An increase in the caliber brings an increase in the output amount, but will cause a decrease in control accuracy. A decrease in the caliber brings an increase in control accuracy, but will cause a decrease in the output speed. It can be seen that the output speed and control accuracy are in conflict, and it is impossible to ensure output accuracy while pursuing speed.

[0003] In the work of outputting large target weight and requiring high precision, if high controllable precision is pursued, then the output caliber needs to be reduced, which will result in a decrease in output speed and a prolongation of output time; conversely, increasing the output caliber will result in a decrease in precision. Therefore, achieving high precision in the output of large target weight is a problem that needs to be solved.

[0004] For fields or places that pursue high precision, such as laboratories, the pharmaceutical industry, the biological industry, or the food industry, the accuracy requirements are usually quite strict, especially when mixing multiple materials, the output cannot exceed the set target weight. Once the material output is excessive, the material cannot be refluxed or taken out at this time, which will cause the mixing failure. If the accuracy of the mixing output cannot be guaranteed, there will be differences between different batches of products.

[0005] There are still some issues that need to be considered for high-precision metering and precise output of controllable output devices. For example, when the output device uses a pulse-controlled pump, it is affected by different pulse frequencies, different material properties, different temperatures, mixed air in the material, etc. The output flow rate does not change in the same proportion as the pulse. For example, the pulse frequency may double, but the flow rate may not necessarily double, so there is uncertainty. Summary of the invention

[0006] The present invention provides a high-speed metering output control method and control system with precise compensation function, which solves the problem of achieving high accuracy in large-capacity output. The technical solution is as follows:

[0007] A high-speed metering output control method with precise compensation function comprises the following steps:

[0008] S1: Place the target container on the storage platform below the high-speed output device outlet and the low-speed output device outlet. The storage platform is provided with a weighing device for weight feedback. The weighing device can feedback the material weight information of the target container and initialize the weighing device data to zero; determine the target weight M that the target container needs to be filled, the low-speed expected weight LM that the low-speed output device needs to be filled, and the high-speed expected weight HM that the high-speed output device needs to be filled, wherein HM=M-LM; determine the high-speed test output HCQ and the low-speed test output LCQ; determine the output speeds of the high-speed output device and the low-speed output device respectively;

[0009] S2: Start the high-speed output device to perform the output of the high-speed dynamic calibration stage. The high-speed dynamic calibration stage is executed according to the high-speed test output HCQ. The output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device. The high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ.

[0010] S3: The high-speed output weight HW is obtained through the feedback data of the weighing device, and the high-speed conventional output HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output HQ; the high-speed output weight HW is obtained again through the feedback data of the weighing device. If the high-speed output weight HW does not reach the high-speed expected weight HM, the high-speed conventional output is continued; otherwise, the low-speed expected weight LM=M-HW of the low-speed output device is recalculated according to the high-speed output weight HW, and the low-speed output device is replaced for output;

[0011] S4: Start the low-speed output device to perform the output of the low-speed dynamic calibration stage. The low-speed dynamic calibration stage is performed according to the low-speed test output LCQ. The output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device. The low-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the low-speed test output LCQ.

[0012] S5: The high and low speed output weight LW is obtained through the feedback data of the weighing device, and the low speed conventional output volume LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC. The low speed output device completes the low speed conventional output according to the low speed conventional output volume LQ; the high and low speed output weight LW is obtained through the feedback data of the weighing device again. If the high and low speed output weight LW does not reach the target weight M, the low speed conventional output continues; if the low speed output weight LW reaches the target weight M, the filling is completed.

[0013] Further, in step S2, the high-speed dynamic calibration stage is performed according to the high-speed test output HCQ, the output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, including the following steps:

[0014] S21: Record the high-speed calibration initial weight value HCW0 fed back by the weighing device, and the high-speed output device completes the high-speed test output according to the high-speed test output HCQ;

[0015] S22: Use the current actual weight HCW1 of the high-speed test fed back by the weighing device to subtract the initial weight value HCW0 of the high-speed calibration to obtain the output weight HCW of the high-speed dynamic calibration. According to the relationship between the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, calculate and store the high-speed calibration parameter value HC=HCQ / HCW.

[0016] Further, in step S3, the high-speed output weight HW is obtained by feedback data from the weighing device, and the high-speed conventional output quantity HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output quantity HQ, including the following steps:

[0017] S31: The remaining part of the high-speed expected weight is the high-speed expected weight HM minus the high-speed output weight HW, where the high-speed output weight HW is the current actual weight of the high-speed output fed back by the weighing device, and the expected weight value of the high-speed conventional output is calculated as HE=HM-HW;

[0018] S32: Calculate the high-speed conventional output amount HQ = HE*HC completed by the high-speed output device according to the expected weight value HE of the high-speed conventional output;

[0019] S33: The high-speed output device completes high-speed output according to the high-speed conventional output quantity HQ.

[0020] Further, in step S4, the low-speed dynamic calibration stage is performed according to the low-speed test output LCQ, the output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the high-speed test output LCQ, including the following steps:

[0021] S41: recording the low-speed calibration initial weight value LCW0 fed back by the weighing device, and the low-speed output device completes the low-speed test output according to the low-speed test output LCQ;

[0022] S42: Use the current actual weight LCW1 of the low-speed test fed back by the weighing device to subtract the initial weight value LCW0 of the low-speed calibration to obtain the output weight LCW of the low-speed dynamic calibration. According to the relationship between the output weight LCW of the low-speed dynamic calibration and the output quantity LCQ of the low-speed test, calculate and store the low-speed calibration parameter value LC=LCQ / LCW.

[0023] Further, in step S5, the high and low speed output weight LW is obtained by feedback data from the weighing device, and the low speed conventional output LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC, and the low speed output device completes the low speed conventional output according to the low speed conventional output LQ, including the following steps:

[0024] S51: The remaining part of the low-speed expected weight is the target weight M minus the high-speed and low-speed output weight LW. The high-speed and low-speed output weight LW is the current actual weight of the high-speed and low-speed outputs fed back by the weighing device. The expected weight value of the low-speed conventional output LE=M-LW is calculated;

[0025] S52: Calculate the low-speed normal output amount LQ = LE * LC completed by the low-speed output device according to the expected weight value LE of the low-speed normal output;

[0026] S53: The low-speed output device completes the low-speed output according to the low-speed normal output quantity LQ.

[0027] Furthermore, if the target weight M≤LM, the low-speed output device is directly used for low-speed output.

[0028] Furthermore, a low-speed output device is used for low-speed conventional output. When approaching the target weight M, a speed reduction and volume reduction operation is provided to reduce the output speed and output volume according to a preset ratio to prevent the material filling target weight from being exceeded.

[0029] Furthermore, for the high-speed dynamic calibration in step S2, after each calibration, a high-speed calibration result maintenance time T1 is set. When the operating conditions remain unchanged, the high-speed calibration parameter value HC can be directly used within the set high-speed calibration result maintenance time T1, and there is no need to frequently perform high-speed calibration, otherwise dynamic calibration needs to be re-performed; for the low-speed dynamic calibration in step S4, after each calibration, a low-speed calibration result maintenance time T2 is set. When the operating conditions remain unchanged, the low-speed calibration parameter value LC can be directly used within the set low-speed calibration result maintenance time T2, and there is no need to frequently perform low-speed calibration, otherwise dynamic calibration needs to be re-performed; T1 and T2 can be the same or different.

[0030] Further, the high-speed expected weight HM must be greater than the expected weight HCE of the high-speed dynamic calibration, and the HCE=HCQ / HC, otherwise the high-speed dynamic calibration is not performed;

[0031] The low-speed expected weight LM must be greater than the expected weight LCE of the low-speed dynamic calibration, where LCE=LCQ / LC, otherwise the low-speed dynamic calibration is not performed.

[0032] Furthermore, the high-speed output device or the low-speed output device can be a pump, the minimum output unit of the pump is a pulse, the output speed of the pump depends on the pulse frequency, and the corresponding output is the number of pulses;

[0033] Alternatively, a high-speed output device or a low-speed output device can use a valve, the minimum output unit of the valve is the opening maintenance time, the output speed of the valve depends on the opening amplitude, and the corresponding output is the time quantity.

[0034] A high-speed metering output control system with precise compensation function comprises a high-speed output device, a low-speed output device, a weighing device and a control device, wherein the high-speed output device and the low-speed output device are connected to the same raw material container, wherein:

[0035] The high-speed output device has a high-speed dynamic calibration function, and can correct the high-speed calibration parameter value HC under different working conditions, so that the high-speed conventional output after the high-speed dynamic calibration can achieve high-speed output according to the high-speed calibration parameter value HC obtained by the high-speed dynamic calibration;

[0036] Wherein, the high-speed calibration parameter value HC=HCQ / HCW, wherein HCQ is the high-speed test output, and HCW is the output weight of the high-speed dynamic calibration;

[0037] The low-speed output device has the function of low-speed dynamic calibration, and can correct the low-speed calibration parameter value LC under different working conditions, so that the low-speed conventional output after the low-speed dynamic calibration can achieve low-speed output according to the low-speed calibration parameter value LC obtained by the low-speed calibration;

[0038] Among them, the low-speed calibration parameter value LC=LCQ / LCW, wherein LCQ is the low-speed test output, and LCW is the output weight of the low-speed dynamic calibration;

[0039] The weighing device can provide feedback on the material weight information of the target container;

[0040] The control device can select a control module or PLC control for data processing and control, which is connected to the weighing device, the high-speed output device and the low-speed output device respectively, and controls the operation or stop of the high-speed output device and the low-speed output device according to the data fed back by the weighing device.

[0041] The high-speed metering output control system with precise compensation function can include a plurality of groups of coordinated working combinations, each of which includes at least one high-speed output device and at least one low-speed output device.

[0042] The high-speed metering output control method and control system with precise compensation function can select a suitable output device and its calibration parameters from the two output devices for the material in a single channel, firstly implement the efficient output of the material by the high-speed output device at the set maximum speed, and then implement the high-precision output and compensation of the material by the low-speed output device, and finally complete the efficient and high-precision automatic metering output of the material. Through the design of the two-way different output speed structure, it has a better precision control effect. The present invention has the following advantages: (1) the material can achieve high-speed output and high precision at the same time; (2) the different output speeds of the two-way output device can quickly realize the output completion, reduce the output time, and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a structural schematic diagram of the high-speed metering output control system with precise compensation function;

[0044] Figure 2 It is a flow chart of the high-speed metering output control method with precise compensation function. DETAILED DESCRIPTION

[0045] like Figure 1 As shown, the high-speed metering output system with precise compensation function comprises a raw material container 1, a storage platform 2, a high-speed output device 4, a low-speed output device 5 and a control device 6: the storage platform 2 is equipped with a weighing device, and the target container is placed on the storage platform below the high-speed output device outlet and the low-speed output device outlet. The weighing device can feedback the material weight information of the target container 3 and send the data to the control device 6; the high-speed output device 4 and the low-speed output device 5 are connected to the same raw material container 1, wherein,

[0046] The high-speed output device has a high-speed dynamic calibration function, and can correct the high-speed calibration parameter value HC under different working conditions, so that the high-speed conventional output after the high-speed dynamic calibration can achieve high-speed output according to the high-speed calibration parameter value HC obtained by the high-speed dynamic calibration;

[0047] Wherein, the high-speed calibration parameter value HC=HCQ / HCW, wherein HCQ is the high-speed test output, and HCW is the output weight of the high-speed dynamic calibration;

[0048] The low-speed output device has the function of low-speed dynamic calibration, and can correct the low-speed calibration parameter value LC under different working conditions, so that the low-speed conventional output after the low-speed dynamic calibration can achieve low-speed output according to the low-speed calibration parameter value LC obtained by the low-speed calibration;

[0049] Among them, the low-speed calibration parameter value LC=LCQ / LCW, wherein LCQ is the low-speed test output, and LCW is the output weight of the low-speed dynamic calibration;

[0050] The weighing device can provide feedback on the material weight information of the target container;

[0051] The control device can select a control module or PLC control for data processing and control, which is connected to the weighing device, the high-speed output device and the low-speed output device respectively, and controls the operation or stop of the high-speed output device and the low-speed output device according to the data fed back by the weighing device.

[0052] Furthermore, the high-speed metering output control system with precise compensation function can include a plurality of groups of coordinated working combinations, each of which includes at least one high-speed output device and at least one low-speed output device.

[0053] like Figure 2 As shown, a high-speed metering output control method with precise compensation function comprises the following steps:

[0054] S1: Place the target container on the storage platform below the high-speed output device outlet and the low-speed output device outlet. The storage platform is provided with a weighing device for weight feedback. The weighing device can feedback the material weight information of the target container and initialize the weighing device data to zero; determine the target weight M that the target container needs to be filled, the low-speed expected weight LM that the low-speed output device needs to be filled, and the high-speed expected weight HM that the high-speed output device needs to be filled, wherein HM=M-LM; determine the high-speed test output HCQ and the low-speed test output LCQ; determine the output speeds of the high-speed output device and the low-speed output device respectively;

[0055] In the embodiment: target weight M=1000, low speed expected weight LM=100, high speed expected weight HM=M-LM=900; high speed test output HCQ=32000, low speed test output LCQ=32000;

[0056] The output speed is used to reflect the material discharge speed. The high-speed output device and the low-speed output device both have their own maximum output speeds, and the output speed is set at this maximum output speed.

[0057] Static weighing: During filling, considering the impact of materials on the weighing device when entering the target container and interference factors such as feedback lag, when the material stops entering, stable measurement needs to wait for a set time before the weighing device can feedback the real and accurate weight. All subsequent static weighings are carried out after this operation, that is, the weighing device feedbacks the confirmed weight.

[0058] The high-speed output device or the low-speed output device can be a pump, the minimum output unit of the pump is a pulse, the output speed of the pump depends on the pulse frequency, and the corresponding output is the number of pulses. Alternatively, the high-speed output device or the low-speed output device can be a valve, the minimum output unit of the valve is the opening maintenance time, the output speed of the valve depends on the opening amplitude, and the corresponding output is the time quantity. Furthermore, the output caliber of the low-speed output device is smaller than that of the high-speed output device.

[0059] For ease of explanation, in the embodiments, both the high-speed output device and the low-speed output device are pumps.

[0060] Both the high-speed output device and the low-speed output device are provided with dynamic calibration, which can adjust the expected weight of the calibration test according to the target weight and can be executed at any time during the filling process by the system according to the conditions.

[0061] S2: Start the high-speed output device to perform the output of the high-speed dynamic calibration stage. The high-speed dynamic calibration stage is executed according to the high-speed test output HCQ. The output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device. The high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ.

[0062] Further, in step S2, the high-speed dynamic calibration stage is performed according to the high-speed test output HCQ, the output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, including the following steps:

[0063] S21: Record the high-speed calibration initial weight value HCW0 fed back by the weighing device, and the high-speed output device completes the high-speed test output according to the high-speed test output HCQ;

[0064] S22: Use the current actual weight HCW1 of the high-speed test fed back by the weighing device to subtract the initial weight value HCW0 of the high-speed calibration to obtain the output weight HCW of the high-speed dynamic calibration. According to the relationship between the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, calculate and store the high-speed calibration parameter value HC=HCQ / HCW.

[0065] In the embodiment, the initial weight value HCW0=0 of the high-speed calibration fed back by the weighing device is recorded, the current actual weight HCW1=100 of the high-speed test fed back by the weighing device is recorded, after the high-speed dynamic test, the output weight HCW=100-0=100 of the high-speed dynamic calibration, and the high-speed calibration parameter value HC=32000 / 100=320.

[0066] Further, the high-speed expected weight HM must be greater than the expected weight HCE of the high-speed dynamic calibration, where HCE=HCQ / HC, otherwise the high-speed dynamic calibration is not performed.

[0067] Furthermore, the high-speed calibration initial weight value HCW0 needs to be measured because if the high-speed output device is used for partial output before the high-speed dynamic calibration, such as a power failure or other problems during the first high-speed dynamic calibration, it is necessary to re-perform the high-speed dynamic calibration. It can be seen that the use of the high-speed output device includes at least two stages: the output of the high-speed dynamic calibration stage and the subsequent high-speed conventional output.

[0068] S3: The high-speed output weight HW is obtained through the feedback data of the weighing device, and the high-speed conventional output HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output HQ; the high-speed output weight HW is obtained again through the feedback data of the weighing device. If the high-speed output weight HW does not reach the high-speed expected weight HM, the high-speed conventional output is continued; otherwise, the low-speed expected weight LM=M-HW of the low-speed output device is recalculated according to the high-speed output weight HW, and the low-speed output device is replaced for output;

[0069] In step S3, the high-speed output weight HW is obtained by feedback data from the weighing device, and the high-speed conventional output quantity HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output quantity HQ, including the following steps:

[0070] S31: The remaining part of the high-speed expected weight is the high-speed expected weight HM minus the high-speed output weight HW, where the high-speed output weight HW is the current actual weight of the high-speed output fed back by the weighing device, and the expected weight value of the high-speed conventional output is calculated as HE=HM-HW;

[0071] In the embodiment, the expected weight value of high-speed conventional output is HE=900-100=800.

[0072] S32: Calculate the high-speed conventional output amount HQ = HE*HC completed by the high-speed output device according to the expected weight value HE of the high-speed conventional output;

[0073] In the embodiment, the high-speed conventional output HQ=800*320=256000.

[0074] S33: The high-speed output device completes high-speed output according to the high-speed conventional output quantity HQ.

[0075] In the embodiment, after the high-speed conventional output is completed, the high-speed output weight HW=902, reaching the high-speed expected weight HM required for filling.

[0076] Taking into account the different physical properties of pumps or valves, as well as the differences in materials, when the high-speed output device finally completes the high-speed conventional output, the weight HW is not necessarily the high-speed expected weight HM. If the high-speed output weight fed back by the weighing device is less than the high-speed expected weight HM, continue to use the high-speed output device for high-speed conventional output according to steps S31-S33, otherwise switch to the low-speed output device for output.

[0077] The expected low-speed weight LM=1000-902=92.

[0078] S4: Start the low-speed output device to perform the output of the low-speed dynamic calibration stage. The low-speed dynamic calibration stage is performed according to the low-speed test output LCQ. The output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device. The low-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the low-speed test output LCQ.

[0079] Further, in step S4, the low-speed dynamic calibration stage is performed according to the low-speed test output LCQ, the output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the high-speed test output LCQ, including the following steps:

[0080] S41: recording the low-speed calibration initial weight value LCW0 fed back by the weighing device, and the low-speed output device completes the low-speed test output according to the low-speed test output LCQ;

[0081] In the embodiment, the low-speed calibration initial weight value LCW0=902 fed back by the weighing device is recorded;

[0082] S42: Use the current actual weight LCW1 of the low-speed test fed back by the weighing device to subtract the initial weight value LCW0 of the low-speed calibration to obtain the output weight LCW of the low-speed dynamic calibration. According to the relationship between the output weight LCW of the low-speed dynamic calibration and the output quantity LCQ of the low-speed test, calculate and store the low-speed calibration parameter value LC=LCQ / LCW.

[0083] In the embodiment, the weighing device feeds back the current actual weight LCW1=922 of the low-speed test, the output weight LCW=922-902=20 of the low-speed dynamic calibration, and the low-speed calibration parameter value LC=32000 / 20=1600.

[0084] Furthermore, the low-speed expected weight LM must be greater than the expected weight LCE of the low-speed dynamic calibration, where LCE=LCQ / LC, otherwise the low-speed dynamic calibration is not performed.

[0085] Furthermore, when the low-speed expected weight LM≤LCE, the low-speed output device is directly used for low-speed output, and low-speed dynamic calibration is no longer performed.

[0086] Furthermore, if the target weight M≤LM, the low-speed output device is directly used for low-speed output.

[0087] Furthermore, the low-speed calibration initial weight value LCW0 needs to be measured because if the low-speed output device is used for partial output before the low-speed dynamic calibration, such as a power failure or other problems during the first low-speed dynamic calibration, it is necessary to re-perform the low-speed dynamic calibration. It can be seen that the use of the low-speed output device includes at least two stages: the output of the low-speed dynamic calibration stage and the subsequent low-speed regular output.

[0088] S5: The high and low speed output weight LW is obtained through the feedback data of the weighing device, and the low speed conventional output volume LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC. The low speed output device completes the low speed conventional output according to the low speed conventional output volume LQ; the high and low speed output weight LW is obtained through the feedback data of the weighing device again. If the high and low speed output weight LW does not reach the target weight M, the low speed conventional output continues; if the low speed output weight LW reaches the target weight M, the filling is completed.

[0089] In step S5, the high and low speed output weight LW is obtained by feedback data from the weighing device, and the low speed conventional output LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC. The low speed output device completes the low speed conventional output according to the low speed conventional output LQ, including the following steps:

[0090] S51: The remaining part of the low-speed expected weight is the target weight M minus the high-speed and low-speed output weight LW. The high-speed and low-speed output weight LW is the current actual weight of the high-speed and low-speed outputs fed back by the weighing device. The expected weight value of the low-speed conventional output LE=M-LW is calculated;

[0091] In the embodiment, the expected weight value of low-speed conventional output is LE=M-LW=1000-922=78.

[0092] S52: Calculate the low-speed normal output amount LQ = LE * LC completed by the low-speed output device according to the expected weight value LE of the low-speed normal output;

[0093] In the embodiment, the low-speed conventional output LQ=1600*78=124800.

[0094] S53: The low-speed output device completes the low-speed output according to the low-speed normal output quantity LQ.

[0095] In the embodiment, the target weight M=1000 is finally reached.

[0096] Furthermore, a low-speed output device is used for low-speed conventional output. When approaching the target weight M, a speed reduction and volume reduction operation is provided to reduce the output speed and output volume according to a preset ratio to prevent the material filling target weight from being exceeded.

[0097] Furthermore, for the high-speed dynamic calibration in step S2, after each calibration, a high-speed calibration result maintenance time T1 is set. When the operating conditions remain unchanged, the high-speed calibration parameter value HC can be directly used within the set high-speed calibration result maintenance time T1, and there is no need to frequently perform high-speed calibration, otherwise dynamic calibration needs to be re-performed; for the low-speed dynamic calibration in step S4, after each calibration, a low-speed calibration result maintenance time T2 is set. When the operating conditions remain unchanged, the low-speed calibration parameter value LC can be directly used within the set low-speed calibration result maintenance time T2, and there is no need to frequently perform low-speed calibration, otherwise dynamic calibration needs to be re-performed; T1 and T2 can be the same or different.

[0098] It can be seen that the high-speed output device, as a high-speed output device, has the characteristics of large output caliber and high output speed, and is responsible for rapid filling to improve efficiency. The output caliber can be adjusted according to different uses to meet the requirements for output speed. The low-speed output device, as a low-speed output and compensation device, has the characteristics of small output caliber, low output speed and high control accuracy. It is responsible for precise compensation to improve the error accuracy of the target total weight, so as to ensure the output accuracy of precise compensation.

[0099] In terms of overall operation, this method is to divide the output of the target total weight into a high-speed output part and a low-speed output and compensation part before the material is output. The entire output process is carried out under the premise of not exceeding the target weight. When the feedback weight does not reach the weight range of the low-speed compensation part, the high-speed output device performs high-speed output, and the control accuracy can be ignored during the high-speed output. When the feedback weight enters the low-speed output and compensation part, the low-speed output device performs high-precision output and compensation to ensure the accuracy of the total output.

[0100] The high-speed output device and the low-speed output device both have dynamic calibration capabilities. During calibration, a test action of N*minimum action unit is set. After completion, the output quantity of each weight unit is calculated based on the weight before and after the test, and the calibration coefficient of the relationship between the output weight and the output quantity is dynamically corrected.

[0101] The present invention adopts different output speeds and different control precision methods combined with respective calibration parameters to accurately complete the material output of the channel. The control device has a dynamic calibration function, which can dynamically test and calibrate the calibration coefficient of the relationship between the output amount and the output weight of each device in a timely manner during conventional output.

Claims

1. A high-speed metering output control method with precise compensation function, characterized in that: The following steps are involved: S1: Place the target container on the storage platform below the high-speed output device outlet and the low-speed output device outlet. The storage platform is provided with a weighing device for weight feedback. The weighing device can feedback the material weight information of the target container and initialize the weighing device data to zero; determine the target weight M that the target container needs to be filled, the low-speed expected weight LM that the low-speed output device needs to be filled, and the high-speed expected weight HM that the high-speed output device needs to be filled, wherein HM=M-LM; determine the high-speed test output HCQ and the low-speed test output LCQ; determine the output speeds of the high-speed output device and the low-speed output device respectively; S2: Start the high-speed output device to perform the output of the high-speed dynamic calibration stage. The high-speed dynamic calibration stage is executed according to the high-speed test output HCQ. The output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device. The high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ. S3: The high-speed output weight HW is obtained through the feedback data of the weighing device, and the high-speed conventional output HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output HQ; the high-speed output weight HW is obtained again through the feedback data of the weighing device. If the high-speed output weight HW does not reach the high-speed expected weight HM, the high-speed conventional output is continued; otherwise, the low-speed expected weight LM=M-HW of the low-speed output device is recalculated according to the high-speed output weight HW, and the low-speed output device is replaced for output; S4: Start the low-speed output device to perform the output of the low-speed dynamic calibration stage. The low-speed dynamic calibration stage is performed according to the low-speed test output LCQ. The output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device. The low-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the low-speed test output LCQ. S5: The high and low speed output weight LW is obtained through the feedback data of the weighing device, and the low speed conventional output LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC. The low speed output device completes the low speed conventional output according to the low speed conventional output LQ; the high and low speed output weight LW is obtained again through the feedback data of the weighing device. If the high and low speed output weight LW does not reach the target weight M, the low speed conventional output is continued; If the low-speed output weight LW reaches the target weight M, filling is completed.

2. The high-speed metering output control method with precise compensation function according to claim 1 is characterized in that: In step S2, the high-speed dynamic calibration stage is performed according to the high-speed test output HCQ, the output weight HCW of the high-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value HC is calculated by the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, including the following steps: S21: Record the high-speed calibration initial weight value HCW0 fed back by the weighing device, and the high-speed output device completes the high-speed test output according to the high-speed test output HCQ; S22: Use the current actual weight HCW1 of the high-speed test fed back by the weighing device to subtract the initial weight value HCW0 of the high-speed calibration to obtain the output weight HCW of the high-speed dynamic calibration. According to the relationship between the output weight HCW of the high-speed dynamic calibration and the high-speed test output HCQ, calculate and store the high-speed calibration parameter value HC=HCQ / HCW.

3. The high-speed metering output control method with precise compensation function according to claim 1 is characterized in that: In step S3, the high-speed output weight HW is obtained by feedback data from the weighing device, and the high-speed conventional output quantity HQ of the remaining part of the high-speed expected weight is calculated according to the high-speed calibration parameter value HC. The high-speed output device completes the high-speed conventional output according to the high-speed conventional output quantity HQ, including the following steps: S31: The remaining part of the high-speed expected weight is the high-speed expected weight HM minus the high-speed output weight HW, where the high-speed output weight HW is the current actual weight of the high-speed output fed back by the weighing device, and the expected weight value of the high-speed conventional output is calculated as HE=HM-HW; S32: Calculate the high-speed conventional output amount HQ = HE*HC completed by the high-speed output device according to the expected weight value HE of the high-speed conventional output; S33: The high-speed output device completes high-speed output according to the high-speed conventional output quantity HQ.

4. The high-speed metering output control method with precise compensation function according to claim 1 is characterized in that: In step S4, the low-speed dynamic calibration stage is performed according to the low-speed test output LCQ, the output weight LCW of the low-speed dynamic calibration is obtained through the feedback data of the weighing device, and the high-speed calibration parameter value LC is calculated by the output weight LCW of the low-speed dynamic calibration and the high-speed test output LCQ, including the following steps: S41: recording the low-speed calibration initial weight value LCW0 fed back by the weighing device, and the low-speed output device completes the low-speed test output according to the low-speed test output LCQ; S42: Use the current actual weight LCW1 of the low-speed test fed back by the weighing device to subtract the initial weight value LCW0 of the low-speed calibration to obtain the output weight LCW of the low-speed dynamic calibration. According to the relationship between the output weight LCW of the low-speed dynamic calibration and the output quantity LCQ of the low-speed test, calculate and store the low-speed calibration parameter value LC=LCQ / LCW.

5. The high-speed metering output control method with precise compensation function according to claim 1 is characterized in that: In step S5, the high and low speed output weight LW is obtained by feedback data from the weighing device, and the low speed conventional output LQ of the remaining low speed expected weight is calculated according to the low speed calibration parameter value LC. The low speed output device completes the low speed conventional output according to the low speed conventional output LQ, including the following steps: S51: The remaining part of the low-speed expected weight is the target weight M minus the high-speed and low-speed output weight LW. The high-speed and low-speed output weight LW is the current actual weight of the high-speed and low-speed outputs fed back by the weighing device. The expected weight value of the low-speed conventional output LE=M-LW is calculated; S52: Calculate the low-speed normal output amount LQ = LE * LC completed by the low-speed output device according to the expected weight value LE of the low-speed normal output; S53: The low-speed output device completes the low-speed output according to the low-speed normal output quantity LQ.

6. The high-speed metering output control method with precise compensation function according to claim 1 is characterized in that: If the target weight M≤LM, directly use the low-speed output device for low-speed output.

7. The high-speed metering output control method with precise compensation function according to claim 5, characterized in that: Use a low-speed output device for low-speed conventional output. When approaching the target weight M, a speed reduction and volume reduction operation is set to reduce the output speed and output volume according to the preset ratio to prevent the material filling target weight from being exceeded.

8. The high-speed metering output control method with precise compensation function according to any one of claims 1 to 5, characterized in that: For the high-speed dynamic calibration in step S2, after each calibration, a high-speed calibration result maintenance time T1 is set. When the operating conditions remain unchanged, the high-speed calibration parameter value HC can be directly used within the set high-speed calibration result maintenance time T1, and there is no need to frequently perform high-speed calibration, otherwise dynamic calibration needs to be re-performed; for the low-speed dynamic calibration in step S4, after each calibration, a low-speed calibration result maintenance time T2 is set. When the operating conditions remain unchanged, the low-speed calibration parameter value LC can be directly used within the set low-speed calibration result maintenance time T2, and there is no need to frequently perform low-speed calibration, otherwise dynamic calibration needs to be re-performed; T1 and T2 can be the same or different.

9. The high-speed metering output control method with precise compensation function according to claim 1, characterized in that: The high-speed expected weight HM must be greater than the expected weight HCE of the high-speed dynamic calibration, and the HCE=HCQ / HC, otherwise the high-speed dynamic calibration is not performed; The low-speed expected weight LM must be greater than the expected weight LCE of the low-speed dynamic calibration, where LCE=LCQ / LC, otherwise the low-speed dynamic calibration is not performed.

10. The high-speed metering output control method with precise compensation function according to any one of claims 1 to 7, characterized in that: The high-speed output device or the low-speed output device can be a pump, the minimum output unit of the pump is a pulse, the output speed of the pump depends on the pulse frequency, and the corresponding output is the number of pulses; Alternatively, a high-speed output device or a low-speed output device can use a valve, the minimum output unit of the valve is the opening maintenance time, the output speed of the valve depends on the opening amplitude, and the corresponding output is the time quantity.

11. A high-speed metering output control system with precise compensation function, characterized in that: It includes a high-speed output device, a low-speed output device, a weighing device and a control device, wherein the high-speed output device and the low-speed output device are connected to the same raw material container, wherein: The high-speed output device has a high-speed dynamic calibration function, and can correct the high-speed calibration parameter value HC under different working conditions, so that the high-speed conventional output after the high-speed dynamic calibration can achieve high-speed output according to the high-speed calibration parameter value HC obtained by the high-speed dynamic calibration; Wherein, the high-speed calibration parameter value HC=HCQ / HCW, wherein HCQ is the high-speed test output, and HCW is the output weight of the high-speed dynamic calibration; The low-speed output device has the function of low-speed dynamic calibration, and can correct the low-speed calibration parameter value LC under different working conditions, so that the low-speed conventional output after the low-speed dynamic calibration can achieve low-speed output according to the low-speed calibration parameter value LC obtained by the low-speed calibration; Among them, the low-speed calibration parameter value LC=LCQ / LCW, wherein LCQ is the low-speed test output, and LCW is the output weight of the low-speed dynamic calibration; The weighing device can provide feedback on the material weight information of the target container; The control device can select a control module or PLC control for data processing and control, which is connected to the weighing device, the high-speed output device and the low-speed output device respectively, and controls the operation or stop of the high-speed output device and the low-speed output device according to the data fed back by the weighing device.

12. The high-speed metering output control system with precise compensation function according to claim 11, characterized in that: The high-speed metering output control system with precise compensation function can include a plurality of groups of coordinated working combinations, each of which includes at least one high-speed output device and at least one low-speed output device.

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