A weighing system and a method of calibrating the same

Abstract

The application discloses a weighing system and a calibration method thereof. The weighing system comprises: a first limiter for separating a total weighing section conveying frame from a straight section conveying frame; a second limiter for separating a main bearing weighing section conveying frame from the straight section conveying frame; a third limiter for separating an auxiliary bearing weighing section conveying frame from the straight section conveying frame; a transmission roller connected with a conveying belt; a total weighing section data acquisition module comprising a first speed sensor and at least four first weight sensors; a main bearing weighing section data acquisition module comprising a second speed sensor and at least four first weight sensors; an auxiliary bearing weighing section data acquisition module comprising a third speed sensor and at least four third weight sensors; and a weight calculation module for calculating the mass of a material to be measured. The weighing system designed in the embodiment of the application is simple in design, saves the design cost, and increases the accuracy of the weighing result.

Description

Technical Field

[0001] This invention relates to the field of weighing technology, and in particular to a weighing system and its calibration method. Background Technology

[0002] Circular tube belt conveyors are a type of green and environmentally friendly continuous material conveying equipment suitable for various complex terrain conditions. They have advantages such as energy saving and environmental protection, no terrain restrictions, wide applicability of materials, and high conveying efficiency, and therefore have received widespread attention.

[0003] Currently, dynamic weighing of circular tube belt conveyors generally adopts a static weighing method with weighing buckets alternating. For bidirectional circular tube belt conveyors, the static weighing method makes the conveying system more complex and the accuracy of the weighing results is relatively low. Summary of the Invention

[0004] This invention provides a weighing system and its calibration method, which simplifies the design of the weighing system, saves design costs, and increases the accuracy of the weighing results.

[0005] According to one aspect of the present invention, a weighing system is provided, comprising: a straight section conveyor frame, a total weighing section conveyor frame, a main load-bearing weighing section conveyor frame, an auxiliary load-bearing weighing section conveyor frame, a limiter, a total weighing section data acquisition module, a main load-bearing weighing section data acquisition module, an auxiliary load-bearing weighing section data acquisition module, a conveyor belt, a drive roller, a weight calculation module, and a display module;

[0006] At least two first limiters are provided between the main weighing section conveyor frame and the straight section conveyor frame; at least two second limiters are provided between the main load-bearing weighing section conveyor frame and the straight section conveyor frame; at least two third limiters are provided between the auxiliary load-bearing weighing section conveyor frame and the straight section conveyor frame.

[0007] The first limit switch is used to separate the main weighing section conveyor frame from the straight section conveyor frame; the second limit switch is used to separate the main load-bearing weighing section conveyor frame from the straight section conveyor frame; the third limit switch is used to separate the auxiliary load-bearing weighing section conveyor frame from the straight section conveyor frame.

[0008] The conveyor belt is installed within the straight section conveyor frame, the main weighing section conveyor frame, the main load-bearing weighing section conveyor frame, and the auxiliary load-bearing weighing section conveyor frame; the conveyor belt is used to transport materials; the drive drum is connected to the conveyor belt and is used to drive the conveyor belt to move;

[0009] The total weighing section data acquisition module includes a first speed sensor and at least four first weight sensors; the first weight sensors are connected to the total weighing section conveyor frame through reinforcing ribs and are used to measure the mass flow rate of the material on the conveyor belt within the total weighing section conveyor frame; the first speed sensors are used to measure the first running speed; wherein, the first running speed is the rotational speed of the drive drum;

[0010] The main load-bearing weighing section data acquisition module includes a second speed sensor and at least four second weight sensors; the second weight sensors are connected to the main load-bearing weighing section conveyor frame through reinforcing ribs and are used to measure the mass flow rate of the material within the main load-bearing weighing section conveyor frame; the second speed sensors are used to measure the second operating speed; the second operating speed is the transmission speed of the conveyor belt within the main load-bearing weighing section conveyor frame.

[0011] The auxiliary bearing weighing section data acquisition module includes a third speed sensor and at least four third weight sensors. The third weight sensors are connected to the auxiliary bearing weighing section conveyor frame through reinforcing ribs and are used to measure the mass flow rate of the material within the auxiliary bearing weighing section conveyor frame. The third speed sensors are used to measure the third operating speed, which is the transmission speed of the conveyor belt within the auxiliary bearing weighing section conveyor frame.

[0012] The weight calculation module is used to calculate the mass of the material to be measured based on the received mass flow rate of the material in the total weighing section conveyor frame, the mass flow rate of the material in the main bearing weighing section conveyor frame, the mass flow rate of the material in the auxiliary bearing weighing section conveyor frame, the first running speed, the second running speed, and the third running speed.

[0013] The display module is used to display the mass of the material to be measured calculated by the weight calculation module.

[0014] Furthermore, the conveyor belt includes an upper half and a lower half, with the upper half and lower half conveying in opposite directions;

[0015] The main weighing section conveyor frame supports the upper and lower parts of the conveyor belt, the main load-bearing weighing section conveyor frame supports the upper part of the conveyor belt, and the auxiliary load-bearing weighing section conveyor frame supports the lower part of the conveyor belt.

[0016] Furthermore, the weighing system also includes: a power supply module;

[0017] The power supply module provides power to the main weighing section data acquisition module, the main load weighing section data acquisition module, the auxiliary load weighing section data acquisition module, the weight calculation module, and the display module.

[0018] Furthermore, the weighing system includes:

[0019] The length of the overall weighing section conveyor frame along the material conveying direction, the length of the main bearing weighing section conveyor frame, and the length of the auxiliary bearing weighing section conveyor frame are equal.

[0020] Furthermore, the weight calculation module is used for:

[0021] When the first operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the total weighing section conveying frame with the gain correction coefficient of the total weighing section; when the first operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the total weighing section conveying frame with the gain correction coefficient of the total weighing section and the first speed correction coefficient; wherein, the first speed correction coefficient is equal to the first operating speed divided by the preset speed;

[0022] When the second operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the main bearing weighing section conveying frame with the gain correction coefficient of the main bearing weighing section; when the second operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the main bearing weighing section conveying frame with the gain correction coefficient of the main bearing weighing section and the second speed correction coefficient; wherein, the second speed correction coefficient is equal to the second operating speed divided by the preset speed;

[0023] When the third operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the auxiliary bearing weighing section conveying frame with the gain correction coefficient of the auxiliary bearing weighing section; when the third operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the auxiliary bearing weighing section conveying frame with the gain correction coefficient of the auxiliary bearing weighing section and the third speed correction coefficient; wherein, the third speed correction coefficient is equal to the third operating speed divided by the preset speed.

[0024] According to another aspect of the present invention, a calibration method for a weighing system is provided for calibrating the weighing system described in the above embodiments. The calibration method for the weighing system includes:

[0025] After the weighing system stops working, static calibration is performed using data measured by the first, second, and third weight sensors in the weighing system with standard weights.

[0026] After static calibration, dynamic calibration of the calibrator system is performed with no material on the conveyor belt and while the conveyor belt is running.

[0027] After performing dynamic calibration of the calibrator system when there is no material on the conveyor belt and the conveyor belt is in operation, perform dynamic calibration of the calibrator system when there is material on the conveyor belt and the conveyor belt is in operation. Determine the correction coefficient based on the mass of the material and the actual mass of the material during the dynamic calibration when there is material on the conveyor belt and the conveyor belt is in operation.

[0028] Furthermore, after static calibration, calibration of the weighing system in a material-free state includes:

[0029] The conveyor belt is run at a first speed, the measurement value of the first weight sensor is set to zero, the measurement value of the second weight sensor is set to zero, and the measurement value of the third weight sensor is set to zero.

[0030] Change the operating speed of the conveyor belt at least twice, and determine whether the material mass flow rate in the total weighing section conveyor frame, the material mass flow rate in the main bearing weighing section conveyor frame, and the material mass flow rate in the auxiliary bearing weighing section conveyor frame are zero during each conveyor belt operation. If they are not zero, adjust the installation positions of the first weight sensor, the second weight sensor, and the third weight sensor, and adjust the idler resistance or the conveyor belt tension.

[0031] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation includes:

[0032] When there is material in the upper half of the conveyor belt and no material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the upper half of the conveyor belt, and read the total mass value of the first material in the total weighing section conveyor frame and the total mass value of the first material in the main bearing weighing section conveyor frame in the weight calculation module.

[0033] Based on the actual mass of the material to be measured in the upper half of the conveyor belt, the total mass of the first material in the overall weighing section conveyor frame, and the total mass of the first material in the main bearing weighing section conveyor frame, determine the gain correction coefficient of the first overall weighing section and the gain correction coefficient of the first main bearing weighing section under the actual mass.

[0034] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation also includes:

[0035] When there is no material in the upper half of the conveyor belt and there is material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the lower half of the conveyor belt, and read the total mass value of the second material in the total weighing section conveyor frame and the total mass value of the first material in the auxiliary bearing weighing section conveyor frame in the weight calculation module.

[0036] Based on the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of the second material in the overall weighing section conveyor frame, and the total mass of the first material in the auxiliary bearing weighing section conveyor frame, determine the gain correction coefficient of the second overall weighing section and the gain correction coefficient of the first auxiliary bearing weighing section under the actual mass.

[0037] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation also includes:

[0038] When there is material in the upper half of the conveyor belt and material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the upper half of the conveyor belt and the actual mass of the material to be measured in the lower half of the conveyor belt, and read the total mass value of the third material in the total weighing section conveyor frame, the total mass value of the second material in the main bearing weighing section conveyor frame and the total mass value of the second material in the auxiliary bearing weighing section conveyor frame in the weight calculation module.

[0039] Based on the actual mass of the material to be measured in the upper half of the conveyor belt, the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of the third material in the overall weighing section conveyor frame, the total mass of the second material in the main bearing weighing section conveyor frame, and the total mass of the second material in the auxiliary bearing weighing section conveyor frame, determine the gain correction coefficient of the third overall weighing section, the gain correction coefficient of the second main bearing weighing section, and the gain correction coefficient of the second auxiliary bearing weighing section under the actual mass.

[0040] The weighing system designed in this embodiment of the invention includes a linear conveyor frame, a total weighing section conveyor frame, a main load-bearing weighing section conveyor frame, an auxiliary load-bearing weighing section conveyor frame, limiters, a total weighing section data acquisition module, a main load-bearing weighing section data acquisition module, an auxiliary load-bearing weighing section data acquisition module, a conveyor belt, a drive roller, a weight calculation module, and a display module. By setting at least two first limiters between the total weighing section conveyor frame and the linear conveyor frame, at least two second limiters between the main load-bearing weighing section conveyor frame and the linear conveyor frame, and at least two third limiters between the auxiliary load-bearing weighing section conveyor frame and the linear conveyor frame, and through data acquisition from the total weighing section data acquisition module, the main load-bearing weighing section data acquisition module, and the auxiliary load-bearing weighing section data acquisition module, dynamic weighing of materials is achieved. Installing the first, second, and third limiters reduces the resistance of the data acquisition module when weighing materials within the conveying structure, increasing the weighing accuracy of dynamic weighing. In contrast, in the prior art, the weighing system includes... When using a unidirectional cylindrical belt conveyor, weighing is performed through at least two weighing hoppers. During the switching of weighing hoppers, material spillage may occur, leading to inaccurate weighing results. Furthermore, when the weighing system includes a bidirectional cylindrical belt conveyor, weighing requires at least four weighing hoppers, making the weighing system design more complex and increasing design costs. The weighing system designed in this embodiment of the invention, compared to existing weighing systems, avoids material spillage due to hopper switching. Moreover, the weighing system designed in this embodiment of the invention has a simpler design and does not affect the basic design parameters of the original cylindrical belt conveyor within the weighing system. It overcomes the problems of poor static weighing accuracy and complex system design in existing technologies, saving design costs. Furthermore, the weight calculation module calculates the mass of the material to be measured by combining the material mass flow rate within the total weighing section conveying frame, the material mass flow rate within the main bearing weighing section conveying frame, and the material mass flow rate within the auxiliary bearing weighing section conveying frame with the first, second, and third operating speeds, further increasing the accuracy of the weighing results.

[0041] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1This is a partial structural schematic diagram of a weighing system provided according to an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of another part of the structure of a weighing system provided according to an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of a bidirectional circular tube belt conveyor according to an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of a weighing system support frame provided according to an embodiment of the present invention;

[0047] Figure 5 This is a flowchart of a calibration method for a weighing system according to an embodiment of the present invention. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] This invention provides a weighing system. Figure 1 This is a partial structural schematic diagram of a weighing system provided according to an embodiment of the present invention. Figure 2 This is a schematic diagram of another part of the structure of a weighing system provided according to an embodiment of the present invention, with reference to... Figure 1 and Figure 2The weighing system includes: a straight section conveyor frame 1, a total weighing section conveyor frame 2, a main load-bearing weighing section conveyor frame 3, an auxiliary load-bearing weighing section conveyor frame 4, a limit switch, a total weighing section data acquisition module 05, a main load-bearing weighing section data acquisition module 06, an auxiliary load-bearing weighing section data acquisition module 07, a conveyor belt, a drive roller 11, a weight calculation module 14, and a display module 15.

[0051] At least two first limiters 8 are provided between the main weighing section conveyor frame 2 and the straight section conveyor frame 1; at least two second limiters 9 are provided between the main load-bearing weighing section conveyor frame 3 and the straight section conveyor frame 1; at least two third limiters 10 are provided between the auxiliary load-bearing weighing section conveyor frame 4 and the straight section conveyor frame 1.

[0052] The first limiter 8 is used to separate the main weighing section conveyor frame 2 from the straight section conveyor frame 1; the second limiter 9 is used to separate the main load-bearing weighing section conveyor frame 3 from the straight section conveyor frame 1; the third limiter 10 is used to separate the auxiliary load-bearing weighing section conveyor frame 4 from the straight section conveyor frame 1.

[0053] The conveyor belt is installed within the straight section conveyor frame 1, the main weighing section conveyor frame 2, the main load-bearing weighing section conveyor frame 3, and the auxiliary load-bearing weighing section conveyor frame 4; the conveyor belt is used to transport materials; the drive drum 11 is connected to the conveyor belt and is used to drive the conveyor belt to move.

[0054] The total weighing section data acquisition module 05 includes a first speed sensor 51 and at least four first weight sensors 5; the first weight sensors 5 are connected to the total weighing section conveyor frame 2 through reinforcing ribs and are used to measure the mass flow rate of the material on the conveyor belt inside the total weighing section conveyor frame 2; the first speed sensor 51 is used to measure the first running speed; wherein, the first running speed is the rotation speed of the drive roller 11.

[0055] The main load weighing section data acquisition module 06 includes a second speed sensor 61 and at least four second weight sensors 6; the second weight sensors 6 are connected to the main load weighing section conveying frame 3 through reinforcing ribs and are used to measure the mass flow rate of the material in the main load weighing section conveying frame 3; the second speed sensor 61 is used to measure the second running speed; the second running speed is the transmission speed of the conveyor belt in the main load weighing section conveying frame 3.

[0056] The auxiliary bearing weighing section data acquisition module 07 includes a third speed sensor 71 and at least four third weight sensors 7; the third weight sensors 7 are connected to the auxiliary bearing weighing section conveyor frame 4 through reinforcing ribs and are used to measure the mass flow rate of the material in the auxiliary bearing weighing section conveyor frame 4; the third speed sensor 71 is used to measure the third running speed; the third running speed is the transmission speed of the conveyor belt in the auxiliary bearing weighing section conveyor frame 4.

[0057] The weight calculation module 14 is used to calculate the mass of the material to be measured based on the received mass flow rate of the material in the total weighing section conveying frame 2, the mass flow rate of the material in the main bearing weighing section conveying frame 3, the mass flow rate of the material in the auxiliary bearing weighing section conveying frame 4, the first running speed, the second running speed, and the third running speed.

[0058] The display module 15 is used to display the mass of the material to be measured calculated by the weight calculation module 14.

[0059] The weighing system includes a bidirectional circular tube belt conveyor, which consists of a drive unit, drive drum, idler drum, tensioning device, conveyor belt, idler roller assembly, and frame, etc. For example... Figure 3 This is a structural schematic diagram of a bidirectional circular tube belt conveyor according to an embodiment of the present invention, as shown below. Figure 3 As shown, the bidirectional circular tube belt conveyor includes a material 100, idlers 200, a support frame 300, and a conveyor belt 400. Figure 4 This is a schematic diagram of the structure of a weighing system support frame according to an embodiment of the present invention, as shown below. Figure 4As shown, the supporting frame can be made of steel and is generally composed of main crossbeams, front and rear uprights, diagonal braces, and upper and lower transverse support rods; "at least two" can be understood as two or more. Specifically, two or more first limiters 8 are provided between the first side of the total weighing section conveyor frame 2 and the straight section conveyor frame 1, and two or more first limiters 8 are also provided between the second side of the total weighing section conveyor frame 2 and the straight section conveyor frame 1. The number of first limiters 8 provided on the first side of the total weighing section conveyor frame 2 and the number of first limiters 8 provided on the second side of the total weighing section conveyor frame 2 can be the same or different. This embodiment of the invention does not impose any restrictions on this. The first limiters 8 are used to separate the total weighing section conveyor frame 2 from the straight section conveyor frame 1, fix the position of the total weighing section conveyor frame 2, and reduce the resistance when the total weighing section data acquisition module 05 weighs the material in the total weighing section conveyor frame 2. Two or more second limiters 9 are provided between the first side of the main bearing weighing section conveyor frame 3 and the straight section conveyor frame 1, and two or more second limiters 9 are also provided between the second side of the main bearing weighing section conveyor frame 3 and the straight section conveyor frame 1. The number of second limiters 9 provided on the first side of the main bearing weighing section conveyor frame 3 and the number of first limiters 8 provided on the second side of the main bearing weighing section conveyor frame 3 are the same as the number of first limiters 8 provided on the second side of the main bearing weighing section conveyor frame 2. The number of second limiters 9 on the second side of the main bearing weighing section conveyor frame 3 can be the same or different. The second limiters 9 are used to separate the main bearing weighing section conveyor frame 3 from the straight section conveyor frame 1, fix the position of the main bearing weighing section conveyor frame 3, and reduce the resistance when the main bearing weighing section data acquisition module 06 weighs the material in the main bearing weighing section conveyor frame 3. Two or more third limiters 10 are provided between the first side of the auxiliary bearing weighing section conveyor frame 4 and the straight section conveyor frame 1, and two or more third limiters 10 are provided between the second side of the auxiliary bearing weighing section conveyor frame 4 and the straight section conveyor frame 1. The number of third limiters 10 on the first side of the auxiliary bearing weighing section conveyor frame 4 can be the same or different from the number of third limiters 10 on the second side of the auxiliary bearing weighing section conveyor frame 4. The third limiters 10 are used to separate the auxiliary bearing weighing section conveyor frame 4 from the straight section conveyor frame 1, fix the position of the auxiliary bearing weighing section conveyor frame 4, and reduce the resistance when the auxiliary bearing weighing section data acquisition module 07 weighs the material in the auxiliary bearing weighing section conveyor frame 4.

[0060] Among them, "at least four" can be understood as four or more. Specifically, the total weighing section data acquisition module 05 includes four or more first gravity sensors 5, the main bearing weighing section data acquisition module 06 includes four or more second gravity sensors 6, and the auxiliary bearing weighing section data acquisition module 07 includes four or more third gravity sensors 7. When the conveyor belt carrying the material to be tested passes through the main weighing section conveyor frame 2, the first gravity sensor 5 will detect the mass flow rate of the material on the conveyor belt in the main weighing section conveyor frame 2 in real time according to the first preset frequency, and transmit the detected mass flow rate of the material on the conveyor belt in the main weighing section conveyor frame 2 to the weight calculation module 14; when the conveyor belt carrying the material to be tested passes through the main bearing weighing section conveyor frame 3, the second gravity sensor 6 will detect the mass flow rate of the material on the conveyor belt in the main bearing weighing section conveyor frame 3 in real time according to the first preset frequency, and transmit the detected mass flow rate of the material on the conveyor belt in the main bearing weighing section conveyor frame 3 to the weight calculation module 14; when the conveyor belt carrying the material to be tested passes through the auxiliary bearing weighing section conveyor frame 4, the third gravity sensor 7 will detect the mass flow rate of the material on the conveyor belt in the auxiliary bearing weighing section conveyor frame 4 in real time according to the first preset frequency, and transmit the detected mass flow rate of the material on the conveyor belt in the auxiliary bearing weighing section conveyor frame 7 to the weight calculation module 14. Simultaneously, the first speed sensor 51 transmits the first operating speed detected in real time at a second preset frequency to the weight calculation module 14; the second speed sensor 61 transmits the second operating speed detected in real time at a second preset frequency to the weight calculation module 14; and the third speed sensor 71 transmits the third operating speed detected in real time at a second preset frequency to the weight calculation module 14. The first and second preset frequencies can be set according to actual conditions, and this embodiment of the invention does not impose any limitations on them. For example, the first and second preset frequencies can be the same or different. The material mass flow rate can be understood as the mass of material passing through a certain frame per unit time.

[0061] After receiving the material mass flow rates in the total weighing section conveyor frame 2, the main bearing weighing section conveyor frame 3, the auxiliary bearing weighing section conveyor frame 4, the first operating speed, the second operating speed, and the third operating speed, the weight calculation module 14 calculates the mass of the material to be measured based on these data. For example, when the first operating speed is the same as the preset speed set in the weight calculation module 14... The mass of the material to be tested is calculated by combining the material mass flow rate within the total weighing section conveying frame 2 with the total weighing section gain correction coefficient. When the first operating speed is different from the preset speed set in the weight calculation module 14, the mass of the material to be tested is calculated by combining the material mass flow rate within the total weighing section conveying frame 2 with the total weighing section gain correction coefficient and the first speed correction coefficient. The first speed correction coefficient is equal to the first operating speed divided by the preset speed. When the second operating speed is the same as the preset speed set in the weight calculation module 14, the mass of the material to be tested is calculated by combining the material mass flow rate within the main bearing weighing section conveying frame 3 with the main bearing weighing section gain correction coefficient. When the second operating speed is different from the preset speed set in the weight calculation module 14, the mass of the material to be tested is calculated by combining the material mass flow rate within the main bearing weighing section conveying frame 3 with the main bearing weighing section gain correction coefficient. The mass flow rate of the material in the auxiliary weighing section 3 is used to calculate the mass of the material to be tested, combined with the gain correction coefficient of the main bearing weighing section and the second speed correction coefficient. The second speed correction coefficient is equal to the second operating speed divided by the preset speed. When the third operating speed is the same as the preset speed set in the weight calculation module 14, the mass of the material to be tested is calculated using the mass flow rate of the material in the auxiliary weighing section 3, combined with the gain correction coefficient of the auxiliary bearing weighing section. When the third operating speed is different from the preset speed set in the weight calculation module 14, the mass of the material to be tested is calculated using the mass flow rate of the material in the auxiliary weighing section 4, combined with the gain correction coefficient of the auxiliary bearing weighing section and the third speed correction coefficient. The third speed correction coefficient is equal to the third operating speed divided by the preset speed. Finally, the mass of the material to be tested calculated by the weight calculation module 14 is displayed through the display module 15.

[0062] The weighing system designed in this embodiment of the invention includes a straight section conveyor frame 1, a total weighing section conveyor frame 2, a main load-bearing weighing section conveyor frame 3, an auxiliary load-bearing weighing section conveyor frame 4, limiters, a total weighing section data acquisition module 05, a main load-bearing weighing section data acquisition module 06, an auxiliary load-bearing weighing section data acquisition module 07, a conveyor belt, a drive roller 11, a weight calculation module 14, and a display module 15. At least two first limiters 8 are provided between the total weighing section conveyor frame 2 and the straight section conveyor frame 1, and the main load-bearing weighing section conveyor frame 3 and the straight section conveyor frame 4 are connected. At least two second limiters 9 are installed between the conveyor frames 1, and at least two third limiters 10 are installed between the auxiliary bearing weighing section conveyor frame 4 and the straight section conveyor frame 1. Through data acquisition from the total weighing section data acquisition module 05, the main bearing weighing section data acquisition module 06, and the auxiliary bearing weighing section data acquisition module 07, the weighing system achieves dynamic weighing of materials. Installing the first limiter 8, second limiter 9, and third limiter 10 reduces the resistance of the data acquisition module when weighing materials within the conveying structure, increasing the weighing accuracy of the dynamic weighing. In contrast, existing weighing systems, when including a unidirectional cylindrical belt conveyor, require at least two weighing hoppers for weighing. During hopper switching, material spillage may occur, leading to inaccurate weighing results. Furthermore, when including a bidirectional cylindrical belt conveyor, at least four weighing hoppers are needed, making the weighing system design more complex and increasing design costs. The weighing system designed in this embodiment of the invention, compared to existing systems, avoids material spillage due to hopper switching. Moreover, the weighing system designed in this embodiment is simpler in design and does not affect the basic design parameters of the original cylindrical belt conveyor within the weighing system. This overcomes the problems of poor static weighing accuracy and complex system design in existing technologies, saving design costs. Furthermore, the weight calculation module 14 calculates the mass of the material to be measured by combining the material mass flow rate within the total weighing section conveying frame 2, the material mass flow rate within the main bearing weighing section conveying frame 3, and the material mass flow rate within the auxiliary bearing weighing section conveying frame 4 with the first, second, and third operating speeds, further increasing the accuracy of the weighing results.

[0063] Further reference Figure 1 and Figure 2 The conveyor belt consists of an upper part and a lower part, and the conveying directions of the upper and lower parts are opposite.

[0064] The main weighing section conveyor frame 2 is used to support the upper and lower parts of the conveyor belt, the main load-bearing weighing section conveyor frame 3 is used to support the upper part of the conveyor belt, and the auxiliary load-bearing weighing section conveyor frame 4 is used to support the lower part of the conveyor belt.

[0065] Specifically, when there is material in the upper half of the conveyor belt and no material in the lower half, the weight calculation module 14 calculates the mass of the material to be measured based on the received mass flow rate of the material in the total weighing section conveyor frame 2, the mass flow rate of the material in the main bearing weighing section conveyor frame 3, the first running speed, and the second running speed. When there is no material in the upper half of the conveyor belt and there is material in the lower half, the weight calculation module 14 calculates the mass of the material to be measured based on the received mass flow rate of the material in the total weighing section conveyor frame 2, the mass flow rate of the material in the auxiliary bearing weighing section conveyor frame 3, the first running speed, and the third running speed. When there is material in the upper half of the conveyor belt and no material in the lower half, the weight calculation module 14 calculates the mass of the material to be measured based on the received mass flow rate of the material in the total weighing section conveyor frame 2, the mass flow rate of the material in the main bearing weighing section conveyor frame 3 and the mass flow rate of the material in the auxiliary bearing weighing section conveyor frame 4, the first running speed, the second running speed, and the third running speed.

[0066] Furthermore, the weighing system also includes: a power supply module;

[0067] The power supply module provides power to the main weighing section data acquisition module, the main load weighing section data acquisition module, the auxiliary load weighing section data acquisition module, the weight calculation module, and the display module.

[0068] Among them, the power module can be a power supply device that can provide electrical energy, such as a battery pack.

[0069] Further reference Figure 1 The weighing system includes:

[0070] The lengths of the total weighing section conveying frame 2, the main bearing weighing section conveying frame 3, and the auxiliary bearing weighing section conveying frame 4 along the material conveying direction are equal.

[0071] Specifically, by setting the lengths of the total weighing section conveyor frame 2, the main bearing weighing section conveyor frame 3, and the auxiliary bearing weighing section conveyor frame 4 to be equal along the material conveying direction, it can be ensured that the weighing length of the material in the total weighing section conveyor frame 2, the main bearing weighing section conveyor frame 3, and the auxiliary bearing weighing section conveyor frame 4 are the same. Furthermore, the accuracy of the weighing result of the material mass flow rate in the total weighing section conveyor frame 2 can be verified by the material mass flow rate in the main bearing weighing section conveyor frame 3 and the auxiliary bearing weighing section conveyor frame 4.

[0072] Furthermore, the weight calculation module is used for:

[0073] When the first operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the total weighing section conveying frame with the gain correction coefficient of the total weighing section; when the first operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the mass flow rate of the material in the total weighing section conveying frame with the gain correction coefficient of the total weighing section and the first speed correction coefficient; wherein, the first speed correction coefficient is equal to the first operating speed divided by the preset speed;

[0074] When the second operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the main bearing weighing section conveying frame with the gain correction coefficient of the main bearing weighing section; when the second operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the main bearing weighing section conveying frame with the gain correction coefficient of the main bearing weighing section and the second speed correction coefficient; wherein, the second speed correction coefficient is equal to the second operating speed divided by the preset speed;

[0075] When the third operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the auxiliary bearing weighing section conveying frame with the gain correction coefficient of the auxiliary bearing weighing section; when the third operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be tested is calculated by combining the material mass flow rate in the auxiliary bearing weighing section conveying frame with the gain correction coefficient of the auxiliary bearing weighing section and the third speed correction coefficient; wherein, the third speed correction coefficient is equal to the third operating speed divided by the preset speed.

[0076] Specifically, when there is material in the upper half of the conveyor belt and no material in the lower half, the weight calculation module needs to calculate the mass of the material to be measured in both the total weighing section conveyor frame and the main bearing weighing section conveyor frame. If the first operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the mass flow rate of the material in the total weighing section with the total weighing section gain correction coefficient. If the first operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the mass flow rate of the material in the total weighing section with the total weighing section gain correction coefficient and the first speed correction coefficient. If the second operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the main bearing weighing section conveying frame needs to be calculated by combining the mass flow rate of the material in the main bearing weighing section with the gain correction coefficient of the main bearing weighing section; if the second operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the main bearing weighing section conveying frame needs to be calculated by combining the mass flow rate of the material in the main bearing weighing section with the gain correction coefficient of the main bearing weighing section and the second speed correction coefficient.

[0077] When there is no material in the upper half of the conveyor belt and there is material in the lower half, the weight calculation module needs to calculate the mass of the material to be measured in both the total weighing section conveyor frame and the auxiliary bearing weighing section conveyor frame. If the first operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the mass flow rate of the material in the total weighing section with the total weighing section gain correction coefficient. If the first operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the mass flow rate of the material in the total weighing section with the total weighing section gain correction coefficient and the first speed correction coefficient. If the third operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the auxiliary bearing weighing section conveying frame needs to be calculated by combining the mass flow rate of the material in the auxiliary bearing weighing section with the gain correction coefficient of the auxiliary bearing weighing section; if the third operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the auxiliary bearing weighing section conveying frame needs to be calculated by combining the mass flow rate of the material in the auxiliary bearing weighing section with the gain correction coefficient of the auxiliary bearing weighing section and the third speed correction coefficient.

[0078] When there is material in both the upper and lower parts of the conveyor belt, the weight calculation module needs to calculate the mass of the material to be measured in the total weighing section conveyor frame, the main bearing weighing section conveyor frame, and the auxiliary bearing weighing section conveyor frame. If the first operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the material mass flow rate in the total weighing section conveyor frame with the total weighing section gain correction coefficient. If the first operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the total weighing section conveyor frame needs to be calculated by combining the material mass flow rate in the total weighing section conveyor frame with the total weighing section gain correction coefficient and the first speed correction coefficient. If the second operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the main bearing weighing section conveying frame needs to be calculated using the material mass flow rate in the main bearing weighing section conveying frame combined with the main bearing weighing section gain correction coefficient. If the second operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the main bearing weighing section conveying frame needs to be calculated using the material mass flow rate in the main bearing weighing section conveying frame combined with the main bearing weighing section gain correction coefficient and the second speed correction coefficient. If the third operating speed is the same as the preset speed set in the weight calculation module, the mass of the material to be measured in the auxiliary bearing weighing section conveying frame needs to be calculated using the material mass flow rate in the auxiliary bearing weighing section conveying frame combined with the auxiliary bearing weighing section gain correction coefficient. If the third operating speed is different from the preset speed set in the weight calculation module, the mass of the material to be measured in the auxiliary bearing weighing section conveying frame needs to be calculated using the material mass flow rate in the auxiliary bearing weighing section conveying frame combined with the auxiliary bearing weighing section gain correction coefficient and the third speed correction coefficient.

[0079] This invention also provides a calibration method for a weighing system, used to calibrate the weighing system described in the above embodiments. Figure 3 ,refer to Figure 3 The calibration methods for weighing systems include:

[0080] S110. After the weighing system stops working, static calibration is performed using the data measured by the first, second, and third weight sensors in the weighing system with standard weights.

[0081] Specifically, after the weighing system stops working, static calibration is performed using standard weights on the data measured by the first, second, and third weight sensors in the weighing system, which can make the measurement results of the first, second, and third weight sensors more accurate.

[0082] S120. After static calibration, dynamic calibration is performed on the calibrator system when there is no material on the conveyor belt and the conveyor belt is running.

[0083] For example, the conveyor belt can be run at a first speed, and the measured value of the first weight sensor, the measured value of the second weight sensor, and the measured value of the third weight sensor can be set to zero. Then, the running speed of the conveyor belt can be changed at least twice, and it can be determined whether the material mass flow rate in the total weighing section conveyor frame, the material mass flow rate in the main bearing weighing section conveyor frame, and the material mass flow rate in the auxiliary bearing weighing section conveyor frame are zero during each conveyor belt operation. If they are not zero, the installation positions of the first, second, and third weight sensors can be adjusted, and the idler resistance or conveyor belt tension can be adjusted.

[0084] S130. After performing dynamic calibration of the calibrator system when there is no material on the conveyor belt and the conveyor belt is in operation, perform dynamic calibration of the calibrator system when there is material on the conveyor belt and the conveyor belt is in operation. Determine the correction coefficient based on the mass of the material and the actual mass of the material during the dynamic calibration when there is material on the conveyor belt and the conveyor belt is in operation.

[0085] Specifically, when there is material in the upper half of the conveyor belt and no material in the lower half, the gain correction coefficients for the total weighing section and the main bearing weighing section are determined based on the actual mass of the material to be measured in the upper half of the conveyor belt, the total mass of material within the total weighing section conveyor frame, and the total mass of material within the main bearing weighing section conveyor frame, for that actual mass. When there is no material in the upper half of the conveyor belt and there is material in the lower half, the gain correction coefficients for the main bearing weighing section are determined based on the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of material within the total weighing section conveyor frame, and the total mass of material within the auxiliary bearing weighing section conveyor frame, for that actual mass. The total weighing section gain correction coefficient and the auxiliary bearing weighing section gain correction coefficient under the actual mass; when there is material in the upper half of the conveyor belt and material in the lower half of the conveyor belt, the total weighing section gain correction coefficient, the main bearing weighing section gain correction coefficient, and the auxiliary bearing weighing section gain correction coefficient under the actual mass are determined based on the actual mass of the material to be measured in the upper half of the conveyor belt, the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of the material in the total weighing section conveying frame, the total mass of the material in the main bearing weighing section conveying frame, and the total mass of the material in the auxiliary bearing weighing section conveying frame.

[0086] The calibration method for the weighing system provided in this embodiment of the invention first performs static calibration using standard weights on the data measured by the first, second, and third weight sensors after the weighing system has stopped operating. Then, after the static calibration, dynamic calibration is performed on the weighing system with the conveyor belt empty and in operation. Finally, after the dynamic calibration with the conveyor belt empty and in operation, dynamic calibration is performed again with the conveyor belt carrying material and in operation. A correction coefficient is determined based on the mass and actual mass of the material during the dynamic calibration with the conveyor belt carrying material. After these three calibrations, the weighing system provided in this embodiment of the invention achieves higher weighing accuracy during dynamic weighing.

[0087] Furthermore, after static calibration, calibration of the weighing system in a material-free state includes:

[0088] The conveyor belt is run at a first speed, the measurement value of the first weight sensor is set to zero, the measurement value of the second weight sensor is set to zero, and the measurement value of the third weight sensor is set to zero.

[0089] Change the operating speed of the conveyor belt at least twice, and determine whether the material mass flow rate in the total weighing section conveyor frame, the material mass flow rate in the main bearing weighing section conveyor frame, and the material mass flow rate in the auxiliary bearing weighing section conveyor frame are zero during each conveyor belt operation. If they are not zero, adjust the installation positions of the first weight sensor, the second weight sensor, and the third weight sensor, and adjust the idler resistance or the conveyor belt tension.

[0090] Specifically, the installation position of the gravity sensor, roller resistance, or conveyor belt tension can be adjusted based on the first, second, and third operating speeds. When the bidirectional circular tube belt conveyor is running at the first speed, the first operating speed measured by the first speed sensor, the second operating speed measured by the second speed sensor, and the third operating speed measured by the third speed sensor are recorded.

[0091] After changing the operating speed of the bidirectional circular tube belt conveyor at least twice, the first operating speed measured by the first speed sensor, the second operating speed measured by the second speed sensor, and the third operating speed measured by the third speed sensor are recorded for each operation.

[0092] If the second operating speed measured by the second speed sensor and the third operating speed measured by the third speed sensor are both greater than the first operating speed measured by the first speed sensor, or if the second operating speed measured by the second speed sensor is greater than the first operating speed measured by the first speed sensor, or if the third operating speed measured by the third speed sensor is greater than the first operating speed measured by the first speed sensor, then adjust the installation position of the speed sensors until the second operating speed and / or the third operating speed are close to the first operating speed; if the second operating speed measured by the second speed sensor and / or the third operating speed measured by the third speed sensor are less than the first operating speed measured by the first speed sensor, then adjust the idler roller resistance and belt tension until the second operating speed and / or the third operating speed are close to the first operating speed.

[0093] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation includes:

[0094] When there is material in the upper half of the conveyor belt and no material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the upper half of the conveyor belt, and read the total mass value of the first material in the total weighing section conveyor frame and the total mass value of the first material in the main bearing weighing section conveyor frame in the weight calculation module.

[0095] Based on the actual mass of the material to be measured in the upper half of the conveyor belt, the total mass of the first material in the overall weighing section conveyor frame, and the total mass of the first material in the main bearing weighing section conveyor frame, determine the gain correction coefficient of the first overall weighing section and the gain correction coefficient of the first main bearing weighing section under the actual mass.

[0096] Specifically, a truck scale or hopper scale can be used as the weighing container for the material to be measured. Let the actual mass of the material to be measured in the upper half of the conveyor belt be M. The material to be measured is transported from the receiving point through the main weighing section conveyor frame and the main bearing weighing section conveyor frame to the unloading point in the upper half of the conveyor belt. After the material is transported, the total mass value M1 of the first material in the main weighing section conveyor frame and the total mass value M2 of the first material in the main bearing weighing section conveyor frame are read in the weight calculation module.

[0097] The first total weighing section gain correction coefficient Q1 is determined by dividing the total mass M1 of the first material within the conveyor frame of the total weighing section by the actual mass M of the material to be measured in the upper half of the conveyor belt, i.e., Q1 = M1 / M. During the actual weighing calculation, the calculated total mass M1 of the first material within the conveyor frame of the total weighing section is multiplied by the first total weighing section gain correction coefficient Q1 to determine the final total mass M1 of the first material within the conveyor frame of the total weighing section. For example, the actual mass of the material to be measured in the upper half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval, and the first total weighing section gain correction coefficient corresponding to each interval is calculated based on the actual mass of the material to be measured in each interval. During the actual weighing process, the first total weighing section gain correction coefficient corresponding to the interval where the actual mass of the measured material is located is selected, and the calculated total mass M1 of the first material within the conveyor frame of the total weighing section is multiplied by the first total weighing section gain correction coefficient corresponding to that interval to determine the final total mass M1 of the first material within the conveyor frame of the total weighing section.

[0098] The first main load weighing section gain correction coefficient Q2 is determined by dividing the total mass M2 of the first material within the main load weighing section conveyor frame by the actual mass M of the material to be measured in the upper half of the conveyor belt, i.e., Q2 = M2 / M. During the actual weighing calculation, the calculated total mass M2 of the first material within the main load weighing section conveyor frame is multiplied by the first main load weighing section gain correction coefficient Q2 to determine the final total mass M2 of the first material within the main load weighing section conveyor frame. For example, the actual mass of the material to be measured in the upper half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval, and the first main load weighing section gain correction coefficient corresponding to each interval is calculated. During the actual weighing process, the first main load weighing section gain correction coefficient corresponding to the interval where the actual mass of the measured material is located is selected, and the calculated total mass M2 of the first material within the main load weighing section conveyor frame is multiplied by the first main load weighing section gain correction coefficient corresponding to that interval to determine the final total mass M2 of the first material within the main load weighing section conveyor frame. The number of intervals can be set according to the actual situation, and this embodiment of the invention does not limit this.

[0099] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation also includes:

[0100] When there is no material in the upper half of the conveyor belt and there is material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the lower half of the conveyor belt, and read the total mass value of the second material in the total weighing section conveyor frame and the total mass value of the first material in the auxiliary bearing weighing section conveyor frame in the weight calculation module.

[0101] Based on the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of the second material in the overall weighing section conveyor frame, and the total mass of the first material in the auxiliary bearing weighing section conveyor frame, determine the gain correction coefficient of the second overall weighing section and the gain correction coefficient of the first auxiliary bearing weighing section under the actual mass.

[0102] Specifically, a truck scale or hopper scale can be used as the weighing container for the material to be measured. Let the actual mass of the material to be measured in the lower half of the conveyor belt be M0. The material to be measured is transported from the receiving point through the main weighing section conveyor frame and the auxiliary bearing weighing section conveyor frame to the unloading point in the lower half of the conveyor belt. After the material is transported, the total mass value of the second material in the main weighing section conveyor frame M11 and the total mass value of the first material in the auxiliary bearing weighing section conveyor frame M21 are read in the weight calculation module.

[0103] The second total weighing section gain correction coefficient Q11 is determined by dividing the total mass M11 of the second material within the conveyor frame of the total weighing section by the actual mass M0 of the material to be measured in the lower half of the conveyor belt, i.e., Q11 = M11 / M0. During the actual weighing calculation, the calculated total mass M11 of the second material within the conveyor frame of the total weighing section is multiplied by the second total weighing section gain correction coefficient Q11 to determine the final total mass M11 of the second material within the conveyor frame of the total weighing section. For example, the actual mass of the material to be measured in the lower half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval, and the second total weighing section gain correction coefficient corresponding to each interval is calculated. During the actual weighing process, the second total weighing section gain correction coefficient corresponding to the interval where the actual mass of the measured material is located is selected, and the calculated total mass M11 of the second material within the conveyor frame of the total weighing section is multiplied by the second total weighing section gain correction coefficient corresponding to that interval to determine the final total mass M11 of the second material within the conveyor frame of the total weighing section.

[0104] The gain correction coefficient Q21 of the first auxiliary bearing weighing section is determined by dividing the total mass M21 of the first material in the conveyor frame of the auxiliary bearing weighing section by the actual mass M0 of the material to be measured in the lower half of the conveyor belt, i.e., Q21=M21 / M0. In the actual weighing calculation process, the calculated total mass of the first material within the auxiliary bearing weighing section conveying frame is multiplied by the first auxiliary bearing weighing section gain correction coefficient Q21 to determine the final total mass of the first material within the auxiliary bearing weighing section conveying frame. For example, the actual mass of the material to be measured in the lower half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval, and the first auxiliary bearing weighing section gain correction coefficient corresponding to each interval is calculated based on the actual mass of the material to be measured in each interval. During the actual weighing process, the first auxiliary bearing weighing section gain correction coefficient corresponding to the interval where the actual mass of the measured material is located is selected, and the calculated total mass of the first material within the auxiliary bearing weighing section conveying frame is multiplied by the first auxiliary bearing weighing section gain correction coefficient corresponding to that interval to determine the final total mass of the first material within the auxiliary bearing weighing section conveying frame. The number of intervals can be set according to actual conditions, and this embodiment of the invention does not limit this.

[0105] Furthermore, dynamic calibration of the weighing system on a conveyor belt carrying materials while the conveyor belt is in operation also includes:

[0106] When there is material in the upper half of the conveyor belt and material in the lower half of the conveyor belt, determine the actual mass of the material to be measured in the upper half of the conveyor belt and the actual mass of the material to be measured in the lower half of the conveyor belt, and read the total mass value of the third material in the total weighing section conveyor frame, the total mass value of the second material in the main bearing weighing section conveyor frame and the total mass value of the second material in the auxiliary bearing weighing section conveyor frame in the weight calculation module.

[0107] Based on the actual mass of the material to be measured in the upper half of the conveyor belt, the actual mass of the material to be measured in the lower half of the conveyor belt, the total mass of the third material in the overall weighing section conveyor frame, the total mass of the second material in the main bearing weighing section conveyor frame, and the total mass of the second material in the auxiliary bearing weighing section conveyor frame, determine the gain correction coefficient of the third overall weighing section, the gain correction coefficient of the second main bearing weighing section, and the gain correction coefficient of the second auxiliary bearing weighing section under the actual mass.

[0108] Specifically, a truck scale or hopper scale can be used as the weighing container for the material to be measured. Let the actual mass of the material to be measured in the upper half of the conveyor belt be M01, and the actual mass of the material to be measured in the lower half of the conveyor belt be M02. The material to be measured is transported from the receiving point through the main weighing section conveyor frame, the main bearing weighing section conveyor frame, and the auxiliary bearing weighing section conveyor frame to the unloading point in the upper half and the unloading point in the lower half of the conveyor belt. After the material is transported, the total mass value of the third material in the main weighing section conveyor frame M10, the total mass value of the second material in the main bearing weighing section conveyor frame M20, and the total mass value of the second material in the auxiliary bearing weighing section conveyor frame M30 are read in the weight calculation module.

[0109] The gain correction coefficient Q12 of the third total weighing section is determined by dividing the total mass value M10 of the third material within the conveyor frame of the total weighing section by the sum of the actual mass M01 of the material to be measured in the upper half of the conveyor belt and the actual mass M02 of the material to be measured in the lower half of the conveyor belt. That is, Q12 = (M01 + M02) / M10. In the actual weighing calculation process, the calculated total mass of the third material within the total weighing section conveying frame is multiplied by the third total weighing section gain correction coefficient Q12 to determine the final total mass of the third material within the total weighing section conveying frame. For example, the actual mass of the material to be measured in the upper half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval. The third total weighing section gain correction coefficient corresponding to the actual mass of the material to be measured in different intervals is calculated. In the actual weighing process, the third total weighing section gain correction coefficient corresponding to the interval is selected based on the interval where the actual mass of the measured material is located. The calculated total mass of the third material within the total weighing section conveying frame is multiplied by the third total weighing section gain correction coefficient corresponding to the interval to determine the final total mass of the third material within the total weighing section conveying frame.

[0110] The gain correction coefficient Q22 of the second main bearing weighing section is determined by dividing the total mass M20 of the second material within the conveyor frame of the main bearing weighing section by the actual mass M01 of the material to be measured in the upper half of the conveyor belt, i.e., Q22=M20 / M01. In the actual weighing calculation process, the calculated total mass of the second material within the main bearing weighing section conveying frame is multiplied by the second main bearing weighing section gain correction coefficient Q22 to determine the final total mass of the second material within the main bearing weighing section conveying frame. For example, the actual mass of the material to be measured in the upper half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval. The second main bearing weighing section gain correction coefficient corresponding to the actual mass of the material to be measured in different intervals is calculated. In the actual weighing process, the second main bearing weighing section gain correction coefficient corresponding to the interval is selected based on the interval where the actual mass of the measured material is located. The calculated total mass of the second material within the main bearing weighing section conveying frame is multiplied by the second main bearing weighing section gain correction coefficient corresponding to the interval to determine the final total mass of the second material within the main bearing weighing section conveying frame.

[0111] The gain correction coefficient Q33 of the second auxiliary bearing weighing section is determined by dividing the total mass M30 of the second material within the conveyor frame of the auxiliary bearing weighing section by the actual mass M02 of the material to be measured in the lower half of the conveyor belt, i.e., Q33 = M30 / M02. In the actual weighing calculation process, the calculated total mass of the second material within the auxiliary bearing weighing section conveying frame is multiplied by the second auxiliary bearing weighing section gain correction coefficient Q33 to determine the final total mass of the second material within the auxiliary bearing weighing section conveying frame. For example, the actual mass of the material to be measured in the lower half of the conveyor belt can be divided into at least three intervals. The actual mass of the material to be measured is determined based on the maximum value of each interval, and the second auxiliary bearing weighing section gain correction coefficient corresponding to each interval is calculated based on the actual mass of the material to be measured in each interval. During the actual weighing process, the second auxiliary bearing weighing section gain correction coefficient corresponding to the interval where the actual mass of the measured material is located is selected, and the calculated total mass of the second material within the auxiliary bearing weighing section conveying frame is multiplied by the second auxiliary bearing weighing section gain correction coefficient corresponding to that interval to determine the final total mass of the second material within the auxiliary bearing weighing section conveying frame. The number of intervals can be set according to actual conditions, and this embodiment of the invention does not limit this.

[0112] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0113] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A weighing system, characterized in that The application relates to a linear-segment conveying frame, a total weighing-segment conveying frame, a main load-bearing weighing-segment conveying frame, an auxiliary load-bearing weighing-segment conveying frame, limiters, a total weighing-segment data acquisition module, a main load-bearing weighing-segment data acquisition module, an auxiliary load-bearing weighing-segment data acquisition module, a conveying belt, a transmission roller, a weight calculation module and a display module. At least two first limiters are arranged between the total weighing-segment conveying frame and the linear-segment conveying frame; at least two second limiters are arranged between the main load-bearing weighing-segment conveying frame and the linear-segment conveying frame; and at least two third limiters are arranged between the auxiliary load-bearing weighing-segment conveying frame and the linear-segment conveying frame. The first limiters are used for separating the total weighing-segment conveying frame from the linear-segment conveying frame; the second limiters are used for separating the main load-bearing weighing-segment conveying frame from the linear-segment conveying frame; and the third limiters are used for separating the auxiliary load-bearing weighing-segment conveying frame from the linear-segment conveying frame. The conveying belt is arranged in the linear-segment conveying frame, the total weighing-segment conveying frame, the main load-bearing weighing-segment conveying frame and the auxiliary load-bearing weighing-segment conveying frame; the conveying belt is used for conveying materials; and the transmission roller is connected with the conveying belt and used for driving the conveying belt to move. The total weighing-segment data acquisition module comprises a first speed sensor and at least four first weight sensors; the first weight sensors are connected with the total weighing-segment conveying frame through reinforced rib plates and used for measuring the mass flow of the materials on the conveying belt in the total weighing-segment conveying frame; and the first speed sensor is used for measuring a first running speed. The main load-bearing weighing-segment data acquisition module comprises a second speed sensor and at least four second weight sensors; the second weight sensors are connected with the main load-bearing weighing-segment conveying frame through reinforced rib plates and used for measuring the mass flow of the materials in the main load-bearing weighing-segment conveying frame; and the second speed sensor is used for measuring a second running speed. The auxiliary load-bearing weighing-segment data acquisition module comprises a third speed sensor and at least four third weight sensors; the third weight sensors are connected with the auxiliary load-bearing weighing-segment conveying frame through reinforced rib plates and used for measuring the mass flow of the materials in the auxiliary load-bearing weighing-segment conveying frame; and the third speed sensor is used for measuring a third running speed. The weight calculation module is used for calculating the mass of the measured materials according to the received mass flow of the materials in the total weighing-segment conveying frame, the mass flow of the materials in the main load-bearing weighing-segment conveying frame, the mass flow of the materials in the auxiliary load-bearing weighing-segment conveying frame, the first running speed, the second running speed and the third running speed. The display module is used for displaying the mass of the measured materials calculated by the weight calculation module. ​ The conveying belt comprises an upper conveying belt half and a lower conveying belt half, and the conveying directions of the upper conveying belt half and the lower conveying belt half are opposite; The total weighing section conveying frame is used for supporting the upper conveying belt half and the lower conveying belt half, the main load-bearing weighing section conveying frame is used for supporting the upper conveying belt half, and the auxiliary load-bearing weighing section conveying frame is used for supporting the lower conveying belt half.

2. The weighing system of claim 1, wherein, Further comprising: a power module; The power module is used for supplying power to the total weighing section data acquisition module, the main load-bearing weighing section data acquisition module, the auxiliary load-bearing weighing section data acquisition module, the weight calculation module and the display module.

3. The weighing system of claim 1, wherein, Including: The length of the total weighing section conveying frame, the length of the main load-bearing weighing section conveying frame and the length of the auxiliary load-bearing weighing section conveying frame are equal in the material conveying direction.

4. The weighing system according to claim 1, wherein The weight calculation module is used for: when the first running speed is equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the total weighing section conveying frame combined with the total weighing section gain correction coefficient; when the first running speed is not equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the total weighing section conveying frame combined with the total weighing section gain correction coefficient and the first speed correction coefficient; wherein the first speed correction coefficient is equal to the first running speed divided by the preset speed; when the second running speed is equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the main load-bearing weighing section conveying frame combined with the main load-bearing weighing section gain correction coefficient; when the second running speed is not equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the main load-bearing weighing section conveying frame combined with the main load-bearing weighing section gain correction coefficient and the second speed correction coefficient; wherein the second speed correction coefficient is equal to the second running speed divided by the preset speed; when the third running speed is equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the auxiliary load-bearing weighing section conveying frame combined with the auxiliary load-bearing weighing section gain correction coefficient; when the third running speed is not equal to the preset speed set in the weight calculation module, calculating the mass of the material to be measured by the mass flow of the material in the auxiliary load-bearing weighing section conveying frame combined with the auxiliary load-bearing weighing section gain correction coefficient and the third speed correction coefficient; wherein the third speed correction coefficient is equal to the third running speed divided by the preset speed.

5. A calibration method of a weighing system for calibrating the weighing system according to any one of claims 1 to 4, characterized in that, Including: After the weighing system stops working, standard weights are used to perform static calibration on the data measured by the first weight sensor, the second weight sensor and the third weight sensor in the weighing system; After the static calibration is completed, dynamic calibration is performed on the weighing system under the condition that the conveying belt is empty and the conveying belt is running. After the dynamic calibration of the weighing system under the condition that the conveying belt is empty and the conveying belt is running, the dynamic calibration of the weighing system under the condition that the conveying belt is loaded and the conveying belt is running is performed, and the correction coefficient is determined according to the mass of the material in the dynamic calibration under the condition that the conveying belt is loaded and the conveying belt is running and the actual mass of the material.

6. The method of calibrating a weighing system of claim 5, wherein, After the static calibration is completed, the dynamic calibration of the weighing system under the condition that the conveying belt is empty and the conveying belt is running comprises: running the conveying belt at a first speed, setting the measurement value of the first weight sensor to zero, setting the measurement value of the second weight sensor to zero, and setting the measurement value of the third weight sensor to zero; changing the running speed of the conveying belt at least twice, determining whether the mass flow of the material in the total weighing section conveying frame, the mass flow of the material in the main load-bearing weighing section conveying frame, and the mass flow of the material in the auxiliary load-bearing weighing section conveying frame are zero during the running of the conveying belt each time, and if not, adjusting the installation positions of the first weight sensor, the second weight sensor, and the third weight sensor, adjusting the roller resistance, or adjusting the tension of the conveying belt.

7. The method of calibrating a weighing system of claim 5, wherein, The dynamic calibration of the weighing system under the condition that the conveying belt is loaded and the conveying belt is running comprises: when the upper half of the conveying belt is loaded and the lower half of the conveying belt is empty, determining the actual mass of the material to be measured in the upper half of the conveying belt, and reading the first total mass of the material in the total weighing section conveying frame and the first total mass of the material in the main load-bearing weighing section conveying frame in the weight calculation module; determining the first total weighing section gain correction coefficient under the actual mass and the first main load-bearing weighing section gain correction coefficient under the actual mass according to the actual mass of the material to be measured in the upper half of the conveying belt, the first total mass of the material in the total weighing section conveying frame, and the first total mass of the material in the main load-bearing weighing section conveying frame.

8. The method of calibrating a weighing system of claim 5, wherein, The dynamic calibration of the weighing system under the condition that the conveying belt is loaded and the conveying belt is running further comprises: when the upper half of the conveying belt is empty and the lower half of the conveying belt is loaded, determining the actual mass of the material to be measured in the lower half of the conveying belt, and reading the second total mass of the material in the total weighing section conveying frame and the first total mass of the material in the auxiliary load-bearing weighing section conveying frame in the weight calculation module; determining the second total weighing section gain correction coefficient under the actual mass and the first auxiliary load-bearing weighing section gain correction coefficient under the actual mass according to the actual mass of the material to be measured in the lower half of the conveying belt, the second total mass of the material in the total weighing section conveying frame, and the first total mass of the material in the auxiliary load-bearing weighing section conveying frame.

9. The method of calibrating a weighing system of claim 5, wherein, The dynamic calibration of the weighing system under the condition that the conveying belt is loaded and the conveying belt is running further comprises: when the upper half of the conveying belt is loaded and the lower half of the conveying belt is also loaded, determining the actual mass of the material to be measured in the upper half of the conveying belt and the actual mass of the material to be measured in the lower half of the conveying belt, and reading the third total mass of the material in the total weighing section conveying frame, the second total mass of the material in the main load-bearing weighing section conveying frame, and the second total mass of the material in the auxiliary load-bearing weighing section conveying frame in the weight calculation module; According to the actual mass of the material to be measured on the upper half of the conveying belt, the actual mass of the material to be measured on the lower half of the conveying belt, the total third material mass value in the total weighing section conveying frame, the total second material mass value in the main load weighing section conveying frame and the total second material mass value in the auxiliary load weighing section conveying frame, the third total weighing section gain correction coefficient under the actual mass, the second main load weighing section gain correction coefficient under the actual mass and the second auxiliary load weighing section gain correction coefficient under the actual mass are determined.

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