Belt weigher calibration method and system

Abstract

The invention discloses a belt weigher calibration method and system. The belt weigher comprises a belt conveyor, at least one load device runs for n circles along with the belt conveyor, and the belt weigher calibration method comprises the following steps: determining the loading cumulative weight and the loading cumulative weight correction coefficient of the at least one load device; correcting the loading cumulative weight according to the loading cumulative weight correction coefficient to determine a corrected loading cumulative weight; determining a verification factor according to the corrected loading cumulative weight and a standard cumulative weight; and verifying the belt weigher according to the verification factor. According to the scheme, the verification reliability and accuracy of the belt weigher are improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of belt scales, and in particular, to a belt scale calibration method and system. Background Art

[0002] The electronic belt scale is the core equipment for industrial bulk material metering; the electronic belt scale is widely used in scenarios such as metering, production control, and energy consumption monitoring in industrial production lines; the calibration of the electronic belt scale is a key link to ensure its measurement accuracy and long-term reliability. Since the belt scale will be affected by factors such as mechanical wear, material impact, and environmental changes during operation, regular calibration can timely detect errors and correct them, avoiding economic losses or production problems caused by inaccurate metering. The existing inspection and calibration methods usually use the results of weighing physical objects with a static scale to calibrate the belt scale. The advantage of this inspection method is high confidence, but the calibration reliability and accuracy are relatively low. Summary of the Invention

[0003] The present invention provides a belt scale calibration method and system to improve the calibration reliability and accuracy of the belt scale.

[0004] To achieve the above object, in a first aspect, the embodiments of the present invention provide a belt scale calibration method. The belt scale includes a belt conveyor, and at least one load device runs n laps following the belt conveyor. The belt scale calibration method includes:

[0005] Determine the loaded cumulative weight and the loaded cumulative weight correction factor of at least one load device;

[0006] Correct the loaded cumulative weight according to the loaded cumulative weight correction factor to determine the corrected loaded cumulative weight;

[0007] Determine a calibration factor according to the corrected loaded cumulative weight and the standard cumulative weight;

[0008] Calibrate the belt scale according to the calibration factor.

[0009] Optionally, determining the cumulative weight correction factor includes:

[0010] Determine the loaded running length of the belt conveyor according to the loading speed signal of the belt conveyor and the number of loaded running laps of the belt conveyor;

[0011] Determine the loaded cumulative weight correction factor according to the actual length of the belt conveyor, the loaded running length of the belt conveyor, and the number of loaded running laps.

[0012] Optionally, determining the loaded cumulative weight of the load device includes:

[0013] Determine the cumulative loaded weight of the load device based on the real-time loading speed signal of the belt conveyor, the real-time loading weighing signal of the load device, and the number of loaded operation cycles of the belt conveyor.

[0014] Optionally, determining a calibration factor based on the corrected cumulative loaded weight and the standard cumulative weight includes:

[0015] Determine the cumulative weight deviation based on the difference between the corrected cumulative loaded weight and the standard cumulative weight;

[0016] Determine the calibration factor based on the cumulative weight deviation and the corrected cumulative loaded weight.

[0017] Optionally, the method further includes: determining the actual no-load weighing signal of the belt conveyor;

[0018] Determine the cumulative loaded weight of the load device based on the real-time speed signal of the belt conveyor, the real-time loading weighing signal of the load device, and the total running time, including:

[0019] Determine the cumulative loaded weight based on the real-time speed signal of the belt conveyor, the real-time loading weighing signal of the load device, the actual no-load weighing signal, and the total running time.

[0020] Optionally, determining the actual no-load weighing signal of the belt conveyor includes:

[0021] Determine the no-load weighing signal correction coefficient and the no-load cumulative weight;

[0022] Determine the average no-load weighing signal based on the no-load cumulative weight and the no-load running length of the belt conveyor;

[0023] Determine the actual no-load weighing signal based on the no-load weighing signal correction coefficient and the average no-load weighing signal.

[0024] In a second aspect, an embodiment of the present invention further provides a belt scale calibration system, which includes: a plurality of load devices, a belt scale, and a control device that executes the belt scale calibration method described in the first aspect above; the belt scale at least includes a belt conveyor; at least one of the load devices runs n circles following the belt conveyor when meeting a preset following condition.

[0025] Optionally, the belt scale further includes a speed measurement module, a magnetic induction module, and a weighing module; there are magnetic chips on the belt conveyor;

[0026] The speed measurement module is used to monitor the speed signal during the operation of the belt conveyor in real time; the magnetic induction module is used to determine the number of operation cycles of the belt conveyor according to the sensed magnetic chips;

[0027] The weighing module is used to monitor the weight signals of at least one of the load devices in real time during the operation of the belt conveyor, or to monitor the actual no-load weight signal.

[0028] Optionally, the projection positions of the load devices on the belt conveyor are different.

[0029] Optionally, each of the load devices includes an annular load belt, a first driving unit, a track driving unit, and a second driving unit; the first driving unit is connected to the track driving unit; the annular load belt is rotatably connected between the first driving unit and the second driving unit;

[0030] The control device is further configured to control at least one of the track driving units to move in a first direction so that at least one of the annular load belts drops onto the belt conveyor;

[0031] The control device is further configured to adjust the speeds of the first driving unit and the second driving unit so that the rotation speed of the belt conveyor is the same as the rotation speed of the annular load belt.

[0032] In the embodiment of the present invention, by determining the loading cumulative weight and the loading cumulative weight correction factor of at least one load device; correcting the loading cumulative weight according to the loading cumulative weight correction factor to determine the corrected loading cumulative weight; and determining the calibration factor according to the corrected loading cumulative weight and the standard cumulative weight; finally, calibrating the belt scale according to the calibration factor, so that by determining the corrected cumulative weight and the calibration factor during the dynamic operation of the load device, the calibration reliability and accuracy of the belt scale are improved.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 is a schematic flowchart of a method for calibrating a belt scale provided by an embodiment of the present invention;

[0036] Figure 2 is a schematic flowchart of another method for calibrating a belt scale provided by an embodiment of the present invention;

[0037] Figure 3It is a schematic flowchart of another belt scale calibration method provided by an embodiment of the present invention;

[0038] Figure 4 It is a schematic flowchart of another belt scale calibration method provided by an embodiment of the present invention;

[0039] Figure 5 It is a schematic structural diagram of a belt scale calibration system provided by an embodiment of the present invention;

[0040] Figure 6 It is a specific structural diagram of a belt scale calibration system provided by an embodiment of the present invention;

[0041] Figure 7 It is a specific structural diagram of another belt scale calibration system provided by an embodiment of the present invention;

[0042] Figure 8 It is a specific structural diagram of a load device provided by an embodiment of the present invention;

[0043] Figure 9 It is a structural diagram of an annular load belt provided by an embodiment of the present invention. Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1It is a flowchart of a belt scale calibration method provided by an embodiment of the present invention; the belt scale includes a belt conveyor, and this embodiment is applicable to the scenario where at least one load device follows the belt conveyor for n laps to evaluate the weighing performance of the belt scale. This method can be executed by software or hardware, such as Figure 1 As shown, the belt scale calibration method specifically includes the following steps:

[0047] S110. Determine the loaded cumulative weight and the loaded cumulative weight correction factor of at least one load device.

[0048] Among them, the load device is a device that simulates materials, that is, the load device has certain weight characteristics; in this embodiment, at least one load device is any single load device among multiple load devices, and combinations of two or more of multiple load devices; for example, multiple load devices include load device A, load device B, and load device C; then at least one load device includes load device A, load device B, load device C, the combination of load device A and load device B, the combination of load device A and load device C, the combination of load device B and load device C, and the combination of load device A, load device B, and load device C.

[0049] The loaded cumulative weight is the total amount of materials for at least one load device following the belt conveyor for n laps; during the process of the load device following the belt conveyor for n laps, it will be affected by environmental factors (such as temperature, humidity, vibration, electromagnetic interference), or mechanical problems such as belt conveyor slippage and wear of the upper idlers of the belt conveyor, which may lead to inaccurate determination of the loaded cumulative weight.

[0050] The loaded cumulative weight correction factor is a factor that can compensate for the deviation in the determination of the loaded cumulative weight caused by environmental factors (such as temperature, humidity, vibration, electromagnetic interference), or mechanical problems such as belt conveyor slippage and wear of the upper idlers of the belt conveyor.

[0051] It should be noted that since at least one load device is any single load device among multiple load devices, and combinations of two or more of multiple load devices, when at least one load device is any single load device among multiple load devices, different loaded cumulative weights and different loaded cumulative weight correction factors corresponding to each load device can be determined; when at least one load device is a combination of two or more of multiple load devices and other combinations, different loaded cumulative weights and different loaded cumulative weight correction factors corresponding to the combinations of two or more of multiple load devices and other combinations can be determined.

[0052] S120. Correct the loaded cumulative weight according to the loaded cumulative weight correction factor to determine the corrected loaded cumulative weight.

[0053] Among them, the corrected loaded cumulative weight can compensate for the error in the magnitude of the loaded cumulative weight caused by environmental factors or mechanical problems; there are various ways to determine the corrected loaded cumulative weight by correcting the loaded cumulative weight according to the loaded cumulative weight correction factor, and specific limitations are not made here.

[0054] S130. Determine a calibration factor according to the corrected loaded cumulative weight and the standard cumulative weight.

[0055] Among them, the standard cumulative weight is the total amount of materials when at least one load device does not run n laps following the belt conveyor; in this embodiment, the calibration factor can be determined according to the deviation between the corrected loaded cumulative weight and the standard cumulative weight; when the deviation is large, the calibration factor is large; when the deviation is small, the calibration factor is small. Of course, it can be understood that the standard cumulative weight is the standard cumulative total determined in the combined form of at least one load device.

[0056] S140. Calibrate the belt scale according to the calibration factor.

[0057] Specifically, determine whether the calibration factor is within a preset calibration factor range. If the calibration factor is within the preset calibration factor range, it is determined that the weighing performance of the belt scale is excellent; if the calibration factor is not within the preset calibration factor range, it is determined that the weighing performance of the belt scale is poor, and then the structure and parameters of the belt scale can be adjusted.

[0058] It should be noted that since the loaded cumulative weight is different loaded cumulative weights and different loaded cumulative weight correction factors determined in various combined forms of at least one load device; correspondingly, in this embodiment, the corrected loaded cumulative weight is also different corrected loaded cumulative totals in various combined forms of at least one load device. Then, the calibration factor determined according to the corrected loaded cumulative weight and the standard cumulative weight is different calibration factors determined in various combined forms of at least one load device. In this way, the belt scale is calibrated multiple times using different calibration factors, which can further increase the reliability and accuracy of the calibration. The order of calibrating the belt scale multiple times with different calibration factors in this embodiment is not limited.

[0059] In the embodiment of the present invention, by determining the loaded cumulative weight and the loaded cumulative weight correction factor of at least one load device; correcting the loaded cumulative weight according to the loaded cumulative weight correction factor to determine the corrected loaded cumulative weight; and determining the calibration factor according to the corrected loaded cumulative weight and the standard cumulative weight; finally, calibrating the belt scale according to the calibration factor. In this way, during the dynamic operation of the load device, by determining the corrected loaded cumulative weight and the calibration factor, the calibration reliability and accuracy of the belt scale are improved; at the same time, since the belt scale is calibrated multiple times, the reliability and accuracy of the calibration can be further increased.

[0060] Optionally, based on the above embodiments, the determination of the loading cumulative weight correction factor and the loading cumulative weight in step S110 is further elaborated. Similarly, this embodiment is also applicable to the evaluation of the weighing performance of the belt scale in the scenario where at least one load device follows the belt conveyor for n laps. Figure 2 is a flowchart of another belt scale calibration method provided by an embodiment of the present invention; as Figure 2 shown, the belt scale calibration method specifically includes the following steps:

[0061] S210. Determine the loading operation length of the belt conveyor according to the loading speed signal of the real-time belt conveyor and the number of loading operation laps of the belt conveyor.

[0062] Among them, the loading speed signal of the belt conveyor is the real-time speed information during the process that at least one load device follows the belt conveyor for n laps; the number of loading operation laps n of the belt conveyor can be determined according to actual calibration requirements; no specific limitation is made thereto; the larger the number of loading operation laps n of the belt conveyor, the higher the reliability of the subsequent calibration factor.

[0063] Specifically, determining the loading operation length of the belt conveyor according to the loading speed signal of the belt conveyor and the number of loading operation laps n of the belt conveyor includes: the total loading operation time of the belt conveyor can be determined by the product of the number of loading operation laps n of the belt conveyor and the time for one lap; the loading operation length of the belt conveyor is determined according to the integral of the loading speed signal of the belt conveyor and the total loading operation time; the loading operation length of the belt conveyor is the actual operation length of the belt conveyor when the load device follows for n laps.

[0064] S220. Determine the loading cumulative weight correction factor according to the actual length of the belt conveyor, the loading operation length of the belt conveyor, and the number of loading operation laps.

[0065] Among them, the actual length of the belt conveyor is the mechanical length or the total length of the belt conveyor, which refers to the length of the complete annular closed path between the driving drum (head pulley) and the tail drum (tail pulley) of the belt conveyor.

[0066] Determining the loading cumulative weight correction factor K1 according to the actual length L of the belt conveyor, the loading operation length L1 of the belt conveyor, and the number of loading operation laps n includes: determining the cumulative actual length according to the product of the actual length L of the belt conveyor and the number of loading operation laps n; determining the cumulative weight correction factor K1 according to the cumulative actual length and the loading operation length L1 of the belt conveyor; specifically: K1 = nL / L1.

[0067] S230. Determine the loading cumulative weight according to the loading speed signal of the real-time belt conveyor, the loading weighing signal of the real-time load device, and the number of loading operation laps of the belt conveyor.

[0068] Among them, the loading weight signal of the real-time load device is the dynamic change weighing information during the process of at least one load device running N laps following the belt conveyor; determining the cumulative weight N1 according to the loading speed signal V1 of the real-time belt conveyor, the loading weight signal M1 of the real-time load device, and the number of loading operation laps n includes: determining the flow information M1V1 of the load device according to the loading speed signal V1 of the real-time belt conveyor and the loading weight signal M1 of the real-time load device; the total loading operation time t1 of the belt conveyor can be determined according to the product of the number of loading operation laps n of the belt conveyor and the time for one lap; determining the loading cumulative weight N1 according to the flow information of the load device and the total loading operation time t1; specifically:

[0069] S240. Correct the loading cumulative weight according to the loading cumulative weight correction factor to determine the corrected loading cumulative weight.

[0070] S250. Determine the calibration factor according to the corrected loading cumulative weight and the standard cumulative weight.

[0071] S260. Calibrate the belt scale according to the calibration factor.

[0072] In this embodiment, based on how to determine the loading cumulative weight correction factor and the loading cumulative weight, correct the loading cumulative weight according to the loading cumulative weight correction factor to determine the corrected loading cumulative weight; and determine the calibration factor according to the corrected loading cumulative weight and the standard cumulative weight; finally, calibrate the belt scale according to the calibration factor. In this way, during the dynamic operation of the load device, by determining the corrected cumulative weight and the calibration factor, the calibration reliability and accuracy of the belt scale are improved.

[0073] Optionally, on the basis of the above embodiment, further elaborate on the above steps S240 and S250. Similarly, this embodiment is also applicable to the scenario of evaluating the weighing performance of the belt scale when at least one load device runs n laps following the belt conveyor. Figure 3 is a flowchart of another belt scale calibration method provided by an embodiment of the present invention; as Figure 3 shown, the method specifically includes the following steps:

[0074] S310. Determine the loading operation length of the belt conveyor according to the loading speed signal of the belt conveyor and the number of loading operation laps of the belt conveyor.

[0075] S320. Determine the loading cumulative weight correction factor according to the actual length of the belt conveyor, the loading operation length of the belt conveyor, and the number of loading operation laps.

[0076] S330. Determine the loading cumulative weight according to the loading speed signal of the real-time belt conveyor, the loading weight signal of the real-time load device, and the number of loading operation laps.

[0077] S340. Determine the corrected cumulative loading weight by correcting the cumulative loading weight according to the cumulative loading weight correction factor.

[0078] Specifically, determining the corrected cumulative loading weight by correcting the cumulative loading weight according to the cumulative loading weight correction factor includes: determining the corrected cumulative loading weight K1N1 according to the product of the cumulative loading weight correction factor K1 and the cumulative loading weight N1; specifically:

[0079] S350. Determine the cumulative weight deviation according to the difference between the corrected cumulative loading weight and the standard cumulative weight.

[0080] Among them, the standard cumulative weight can be determined according to the material weight M measured by at least one load device in the air 11 , the actual length L of the belt conveyor and the number of loaded operation laps n. Specifically: ∑M 11 = nM 11 L; determine the cumulative weight deviation according to the difference between the corrected cumulative loading weight K1N1 and the standard cumulative weight ∑M 11 Specifically: Specifically:

[0081] S360. Determine the calibration factor according to the cumulative weight deviation and the corrected cumulative loading weight.

[0082] Among them, determining the calibration factor according to the cumulative weight deviation and the corrected cumulative loading weight includes: determining the calibration factor Q according to the ratio of the cumulative weight deviation and the corrected cumulative loading weight K1N1; specifically:

[0083]

[0084] It should be noted that the calibration factor in this embodiment is different calibration factors determined under various combination forms of at least one load device; for example, when multiple load devices include load device A, load device B, and load device C; then at least one load device includes load device A, or the combination of load device A and load device B, or the combination of load device A, load device B, and load device C;

[0085] Then the calibration factor determined by load device A following the operation of the belt conveyor is specifically:

[0086]

[0087] The calibration factor determined by the combination of load device A and load device B following the operation of the belt conveyor is specifically:

[0088]

[0089] The calibration factors determined by the combination of the A load device, the B load device, and the C load device following the operation of the belt conveyor are specifically as follows:

[0090]

[0091] There is no specific limitation on the order of determining each calibration factor.

[0092] S370. Calibrate the belt scale according to the calibration factor.

[0093] In this embodiment, the corrected loaded cumulative weight is determined by multiplying the load cumulative weight correction factor by the loaded cumulative weight; and the cumulative weight deviation is determined based on the difference between the corrected loaded cumulative weight and the standard cumulative weight. The calibration factor is determined based on the cumulative weight deviation and the corrected loaded cumulative weight. Finally, the belt scale is calibrated according to the calibration factor. In this way, during dynamic operation, the load device improves the calibration reliability and accuracy of the belt scale by determining the corrected cumulative weight and the calibration factor.

[0094] Optionally, on the basis of the above embodiment, the above embodiment is further optimized. Similarly, this embodiment is also applicable to the evaluation of the weighing performance of the belt scale in the scenario where at least one load device follows the belt conveyor and runs n laps. Figure 4 It is a flowchart of another belt scale calibration method provided by an embodiment of the present invention; as Figure 4 shown, the belt scale calibration method specifically includes the following steps:

[0095] S410. Determine the actual no-load weighing signal of the belt conveyor.

[0096] Among them, the actual no-load weighing signal is the dynamic change weighing information when the belt conveyor automatically selects to run with an empty belt for n laps under zero load; the actual no-load weighing signal can be used to calibrate the zero point, eliminate the tare interference, and improve the confirmation accuracy of the subsequent loaded cumulative weight.

[0097] In some embodiments, determining the actual no-load weighing signal of the belt conveyor includes: determining the no-load weighing signal correction factor K0 and the no-load cumulative weight N0; determining the average no-load weighing signal M according to the no-load cumulative weight N0 and the no-load running length L0 of the belt conveyor 01 ; determining the actual no-load weighing signal M according to the no-load weighing signal correction factor K0 and the average no-load weighing signal M 01 02

[0098] The no-load cumulative weight N0 can be determined according to the no-load speed signal V0, the real-time no-load weighing signal M0, and the total no-load running time t0 of the belt conveyor when it is no-load; specifically:

[0099] The average no-load weighing signal M​​01 It can be determined based on the ratio of the no-load cumulative weight N0 to the no-load running length L0 of the belt conveyor; specifically:

[0100] The correction coefficient K0 of the no-load weighing signal is determined according to the no-load running length L0 of the belt conveyor, the number of no-load running circles n and the actual length L of the belt conveyor; specifically: K0 = nL / L0;

[0101] Correction of no-load weighing signal M 02 The correction coefficient K0 of the no-load weighing signal and the average no-load weighing signal M 01 The product is determined; specifically: M 02 =K0M 01 .

[0102] S420, determining the loading running length of the belt conveyor according to the loading speed signal of the belt conveyor and the number of loading running circles of the belt conveyor.

[0103] S430, determining a correction coefficient for the accumulated loading weight according to the actual length of the belt conveyor, the loaded running length of the belt conveyor, and the number of loaded running circles.

[0104] S440, determining the cumulative loading weight according to the real-time loading speed signal of the belt conveyor, the real-time loading weighing signal of the load device, the actual no-load weighing signal and the number of loading operation circles.

[0105] Among them, according to the real-time belt conveyor loading speed signal V1, the real-time load device loading weighing signal M1, the actual no-load weighing signal M 02 The number of loading cycles n determines the cumulative loading weight N1, including: the weight signal M1 of the real-time load device and the actual no-load weighing signal M 02 The difference between the real-time load device and the real-time load device determines the corrected weighing signal; the corrected flow information (M1-M 02 ) V1; the total loading operation time t1 of the belt conveyor can be determined according to the product of the number of loading operation circles n of the belt conveyor and the time of one operation circle; the cumulative loading weight N1 is determined according to the corrected flow information of the load device and the total loading operation time t1;

[0106] Specifically,

[0107] In this embodiment, the actual no-load weighing signal is taken into account in determining the loaded cumulative weight N1, thereby eliminating the interference of the tare weight and ensuring that the loaded cumulative weight N1 has higher accuracy and higher reliability.

[0108] S450, correcting the loaded cumulative weight according to the loaded cumulative weight and the loaded cumulative weight correction coefficient to determine the corrected loaded cumulative weight.

[0109] S460. Determine the cumulative weight deviation based on the difference between the corrected loaded cumulative weight and the standard cumulative weight.

[0110] S470. Determine the calibration factor based on the cumulative weight deviation and the corrected loaded cumulative weight.

[0111] S480. Calibrate the belt scale according to the calibration factor.

[0112] In this embodiment, by adding the determination of the actual no-load weighing signal of the belt conveyor, thus according to the speed signal V1 of the real-time belt conveyor, the weight signal M1 of the real-time load device, and the actual no-load weighing signal M 02 The loaded cumulative weight N1 determined according to the total loading running time t1 has higher accuracy. Then, the corrected loaded cumulative weight determined by further multiplying the loaded cumulative weight correction factor and the loaded cumulative weight has higher accuracy; and determine the cumulative weight deviation according to the difference between the corrected loaded cumulative weight and the standard cumulative weight, determine the calibration factor according to the cumulative weight deviation and the corrected loaded cumulative weight, and finally calibrate the belt scale according to the calibration factor, thus further improving the reliability and accuracy of the calibration of the belt scale.

[0113] Based on the same inventive concept, an embodiment of the present invention also provides a belt scale calibration system. Figure 5 It is a schematic structural diagram of a belt scale calibration system provided by an embodiment of the present invention; as Figure 5 shown, the belt scale calibration system includes: a plurality of load devices 10, a belt scale 20, and a control device 30 that executes the above belt scale calibration method; the belt scale 20 includes at least a belt conveyor 21; at least one load device 10 runs following the belt conveyor 21 when meeting a preset following condition. Among them, the number of load devices 10 in this embodiment is not specifically limited; the combination mode of at least one load device 10 is not limited either; the specific manner of realizing that at least one load device 10 runs following the belt conveyor 21 for N circles is not limited either; since this embodiment includes the control device 30 that executes the above belt scale calibration method in the above embodiment, it also has the beneficial effects of the above embodiment, which will not be elaborated here.

[0114] Optionally, in the above embodiment, the belt scale 20 is further refined. Figure 6 It is a specific schematic diagram of a belt scale calibration system provided by an embodiment of the present invention; as Figure 6As shown in the figure, the belt scale 20 further includes a speed measurement module 22, a magnetic induction module 23, and a weighing module 24; the belt conveyor 21 includes a magnetic sheet 211; the speed measurement module 22 is used to monitor the speed signal during the operation of the belt conveyor 21 in real time; the magnetic induction module 23 is used to determine the number of running circles n of the belt conveyor according to the sensed magnetic sheet 211; the weighing module 24 is used to monitor the loading weighing signal of at least one load device 10 in real time during the operation of the belt conveyor, or monitor the real-time no-load weighing signal.

[0115] Among them, the speed measurement module 22 can be a speed measurement sensor; the magnetic induction module 23 is a magnetic inductor; the weighing module 24 can be a weighing sensor; the control device 30 is electrically connected to the speed measurement module 22, the magnetic induction module 23, and the weighing module 24. When at least one load device 10 follows the operation of the belt conveyor 21 when meeting the preset following conditions, it can obtain the loading speed signal during the operation of the belt conveyor 21, the loading running circles n of the belt conveyor, and the loading weighing signal of the load device 10, and determine the loading running length of the belt conveyor according to the loading speed signal of the belt conveyor and the loading running circles of the belt conveyor; and determine the loading cumulative weight correction coefficient according to the actual length of the belt conveyor, the loading running length of the belt conveyor, and the loading running circles; and also determine the loading cumulative weight according to the loading speed signal of the real-time belt conveyor, the loading weighing signal of the real-time load device, and the loading running circles. In this way, the loading cumulative weight is corrected by the loading cumulative weight correction coefficient to determine the corrected loading cumulative weight, and the calibration factor is determined according to the corrected loading cumulative weight and the standard cumulative weight, so as to calibrate the belt scale according to the calibration factor, improving the calibration reliability and accuracy of the belt scale.

[0116] Of course, the control device 30 can also obtain the no-load speed signal during the operation of the belt conveyor 21, the no-load running circles n of the belt conveyor, and the real-time no-load weighing signal when it is no-load, so as to determine the actual no-load weighing signal based on the no-load speed signal, the no-load running circles n, and the real-time no-load weighing signal. The specific process of determining the actual no-load weighing signal is as in the above embodiment and will not be elaborated here.

[0117] Optionally, in the above embodiment, the load device 10 is further refined. Figure 7 It is a schematic structural diagram of another belt scale calibration system provided by an embodiment of the present invention; as Figure 7As shown, each load device 10 includes an annular load belt 11, a first driving unit 12, a track driving unit 13 and a second driving unit 14; the first driving unit 12 is connected to the track driving unit 13; the annular load belt 11 is rotatably connected between the first driving unit 12 and the second driving unit 14; the control device 40 is further configured to control at least one track driving unit 13 to move in a first direction so that at least one annular load belt 11 drops onto the belt conveyor 21; the control device 40 is further configured to adjust the speeds of the first driving unit 12 and the second driving unit 14 so that the rotation speed of the belt conveyor 21 is the same as that of the annular load belt 11.

[0118] Specifically, the process of each load device 10 following the operation of the belt conveyor 21 is as follows: the control device 40 controls the track driving unit 13 to move in a first direction, which is the direction close to the second driving unit 14, so that the tension between the annular load belts 11 is reduced, thereby causing the annular load belts 11 to drop vertically onto the belt conveyor 21; after the annular load belts 11 drop vertically onto the belt conveyor 21, the control device 40 adjusts the rotation speeds of the first driving unit 12 and the second driving unit 14 to be the same as the rotation speed of the annular load belts 11, ensuring that the annular load belts 11 can land on the belt conveyor 21 and run without slipping, and at the same time ensuring that the annular load belts 11 can continuously rotate in a cycle on the belt conveyor 21. It can be understood that when at least one load device 10 calibrates the belt scale simultaneously, at least one track driving unit 13, at least one first driving unit 12 and at least one second driving unit 14 can be driven to work simultaneously, so that at least one load device 10 follows the operation of the belt conveyor 21.

[0119] Optionally, Figure 8 is a schematic structural diagram of a load device provided by an embodiment of the present invention; as Figure 8 shown, the first driving unit 12 includes a first gear driving motor 121, a first variable speed transmission assembly 122, a first gear driving wheel 123 and a speed measuring encoder 124; the track driving unit 13 includes a track walking motor 131, an H-shaped track 132, a track connecting member 133 and a proximity switch 134; the third driving unit 14 includes a second gear driving motor 141, a second variable speed transmission assembly 142 and a second gear driving wheel 143; the annular load belt 11 is rotatably connected between the first gear driving wheel 123 and the second gear driving wheel 143.

[0120] Specifically, when the calibration starts, the control device 40 controls the track walking motor 131 to move along the H-shaped track 132 in the first direction (i.e., towards the proximity switch 134). When the proximity switch 134 detects the signal of the approaching first drive unit 12, the control device 40 controls the track walking motor 131 to stop moving. At this time, the annular load belt 11 drops onto the belt conveyor 21. After the annular load belt 11 drops onto the belt conveyor 21, the control device 40 controls the first gear drive motor 121 and the second gear drive motor 141 to work, and adjusts the rotation speeds of the first gear drive wheel 123 and the second gear drive wheel 143 through the first speed change transmission assembly 122 and the second speed change transmission assembly 142. When the rotation speed detected by the speed measurement encoder 124 is the same as the rotation speed on the belt conveyor 21, the magnetic induction module 23 counts the number of running circles N of the belt conveyor according to the detected magnetic chip 211.

[0121] Optionally, continue to refer to Figure 6 , the projection positions of each annular load device 10 on the belt conveyor 21 are different. Among them, the projection positions of each annular load device 10 on the belt conveyor 21 are different. In this way, when calibrating the belt scale, different annular load devices at different positions can be used to calibrate the belt scale, which can well simulate the scenario of continuous material flow on the entire conveyor belt and improve the reliability of belt scale calibration. Preferably, each annular load device 10 includes an A load device, a B load device, and a C load device; the projection positions of the A load device, the B load device, and the C load device on the belt conveyor 21 are the left position, the middle position, and the right position; in this way, after the belt scale is calibrated using the B load device, the A load device or the C load device can be used to perform an off-center load calibration on the belt scale, which can well simulate the scenario of continuous material flow on the entire conveyor belt.

[0122] Optionally, Figure 9 is a schematic structural diagram of an annular load belt provided by an embodiment of the present invention; the annular load belt 11 includes: an annular skeleton 111; the annular skeleton 111 includes a plurality of transmission holes A; a plurality of volume cavities B are included between the transmission holes A; the volume cavities B are filled with materials. Among them, the annular skeleton 111 is composed of a polyester filament fabric; the surface of the annular skeleton 111 can be coated with highly wear-resistant and highly elastic materials such as PVC or rubber; the transmission holes A can be gear transmission holes and are rotationally connected to the first gear drive wheel 123 and the second gear drive wheel 143; the volume cavities B can be filled with bulk materials with a relatively large specific gravity such as equal-weight iron sand.

[0123] Preferably, in some embodiments, the intervals between the transmission holes A are the same to ensure the uniformity of the bulk materials. The number of transmission holes A of each annular load belt 11 can be the same or different.

[0124] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A belt scale calibration method, wherein the belt scale comprises a belt conveyor, and at least one load device follows the belt conveyor to run n circles, characterized in that: include: Determining a loaded cumulative weight and a loaded cumulative weight correction factor of at least one load device; Correcting the loaded cumulative weight according to the loaded cumulative weight correction coefficient to determine a corrected loaded cumulative weight; Determine a calibration factor based on the corrected loaded cumulative weight and the standard cumulative weight; The belt scale is calibrated according to the calibration factor.

2. The belt scale calibration method according to claim 1, characterized in that: Determine the cumulative weight correction factor, including: Determining the loading running length of the belt conveyor according to the loading speed signal of the belt conveyor and the number of loading running circles of the belt conveyor; The loading cumulative weight correction coefficient is determined according to the actual length of the belt conveyor, the loaded running length of the belt conveyor and the number of loaded running circles.

3. The belt scale calibration method according to claim 1, characterized in that: Determining the cumulative weight of the loading device includes: The accumulated loading weight of the loading device is determined according to the real-time loading speed signal of the belt conveyor, the real-time loading weighing signal of the loading device and the number of loading running circles of the belt conveyor.

4. The belt scale calibration method according to claim 1, characterized in that: Determining a calibration factor according to the corrected loaded cumulative weight and the standard cumulative weight includes: determining a cumulative weight deviation according to a difference between the corrected loaded cumulative weight and the standard cumulative weight; A calibration factor is determined based on the cumulative weight deviation and the corrected loaded cumulative weight.

5. The belt scale calibration method according to claim 3, characterized in that: Also includes: Determine the actual no-load weighing signal of the belt conveyor; Determining the accumulated loading weight of the loading device according to the real-time speed signal of the belt conveyor, the real-time loading weighing signal of the loading device and the total running time includes: The accumulated loading weight is determined according to the real-time speed signal of the belt conveyor, the real-time loading weighing signal of the load device, the actual no-load weighing signal and the total running time.

6. The belt scale calibration method according to claim 5, characterized in that: Determine the actual no-load weighing signal of the belt conveyor, including: Determine the correction coefficient of no-load weighing signal and no-load accumulated weight; Determine an average no-load weighing signal according to the no-load cumulative weight and the no-load running length of the belt conveyor; The actual no-load weighing signal is determined according to the no-load weighing signal correction coefficient and the average no-load weighing signal.

7. A belt scale calibration system, characterized in that: include: A plurality of load devices, a belt scale and a control device for executing the belt scale calibration method described in any one of claims 1 to 6; the belt scale comprises at least a belt conveyor; at least one of the load devices follows the belt conveyor for n turns when a preset following condition is met.

8. The belt scale calibration system according to claim 7, characterized in that: The belt scale also includes a speed measurement module, a magnetic induction module and a weighing module; the belt conveyor includes a magnetic sheet; The speed measuring module is used to monitor the speed signal of the belt conveyor during operation in real time; the magnetic induction module is used to determine the number of running circles of the belt conveyor according to the sensed magnetic sheet; The weighing module is used to monitor the weight signal of at least one of the load devices in real time during the operation of the belt conveyor, or to monitor the actual no-load weight signal.

9. The belt scale calibration system according to claim 7, characterized in that: The projection positions of the load devices on the belt conveyor are different.

10. The belt scale calibration system according to claim 7, characterized in that: Each of the load devices comprises an annular load belt, a first drive unit, a track drive unit and a second drive unit; the first drive unit is connected to the track drive unit; the annular load belt is rotatably connected between the first drive unit and the second drive unit; The control device is further used to control at least one of the track drive units to move in a first direction so that at least one of the endless load belts falls onto the belt conveyor; The control device is further used to adjust the speed of the first driving unit and the second driving unit so that the rotation speed of the belt conveyor is the same as the rotation speed of the endless load belt.

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