Dynamic weighing system, recommended method, device and equipment for measuring accuracy of integrator

Abstract

An embodiment of the present invention provides a dynamic weighing system, a method, device and equipment for recommending the measurement accuracy of an integrator. The dynamic weighing system includes: a belt scale, a speed sensor, and an integrator; the integrator is configured to obtain the response duration of the dynamic weighing system; determine the supported measurement accuracy of the integrator according to the response duration, and determine the measurement accuracy of the dynamic weighing system according to the supported measurement accuracy; the integrator is further configured to determine the weight flow rate of the items transported on the conveyor based on the measurement accuracy, the weight signal provided by the belt scale, and the speed signal provided by the speed sensor. This solution can avoid the weighing system from failing to achieve the expected measurement accuracy, and can also avoid waste of hardware resources caused by setting too high a measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic weighing, and in particular to a dynamic weighing system, a method, device and equipment for recommending the measurement accuracy of an integrator. Background Art

[0002] During the process of an item being transported by a conveyor, dynamic weighing is used to measure the weight flow rate of the item during transportation.

[0003] A dynamic weighing system includes a belt scale, a speed sensor and an integrator. Generally, workers often try to use these three types of instruments with as high precision as possible to improve the system accuracy. However, in fact, the system accuracy of the dynamic weighing system is also greatly affected by the structural frame of the steel structure at the user site. The belt scale is installed on the structural frame of the steel structure. If the stiffness of the steel structure frame is low, it will affect the measurement accuracy of the belt scale, resulting in the dynamic weighing system being unable to achieve the expected accuracy. Summary of the Invention

[0004] In view of this, the present invention provides a dynamic weighing system that can measure the actual response duration of the system during dynamic weighing, determine the supported measurement accuracy of the entire dynamic weighing system based on this response duration, and then set the measurement accuracy of the integrator according to the actual supported measurement accuracy, avoiding the dynamic weighing system from failing to achieve the expected measurement accuracy.

[0005] According to the first aspect of the embodiments of the present invention, a dynamic weighing system is provided. The dynamic weighing system includes: a belt scale for measuring the weight of the item being transported on the conveyor, where the belt scale is placed on the structural frame of the conveyor; a speed sensor for measuring the item transportation speed of the conveyor; an integrator for obtaining the response duration of the dynamic weighing system during the debugging process of the measurement accuracy, determining the supported measurement accuracy of the dynamic weighing system according to the response duration, and determining the measurement accuracy of the integrator according to the supported measurement accuracy; the integrator is further configured to determine the weight flow rate of the item being transported on the conveyor based on the measurement accuracy, according to the weight signal provided by the belt scale and the speed signal provided by the speed sensor.

[0006] According to the second aspect of the embodiments of the present invention, a method for recommending the measurement accuracy of an integrator is provided. The method is applied to the integrator included in the dynamic weighing system as described in the first aspect above. The method includes: obtaining the response duration of the dynamic weighing system; determining the supported measurement accuracy of the dynamic weighing system according to the response duration, and recommending the set measurement accuracy according to the supported measurement accuracy.

[0007] According to a third aspect of an embodiment of the present invention, there is provided a measuring accuracy recommendation device for an integrator, which is applied to an integrator included in the dynamic weighing system as described in the first aspect above. The device includes a timing module and a recommendation module. The timing module is configured to obtain the response duration of the dynamic weighing system; the recommendation module is configured to determine the supported measuring accuracy of the dynamic weighing system according to the response duration, and recommend the set measuring accuracy according to the supported measuring accuracy.

[0008] According to a fourth aspect of an embodiment of the present invention, there is provided an integrator, which includes: a processor, a memory, a communication interface, and a communication bus. The processor, the memory, and the communication interface complete communication with each other through the communication bus; the memory is used to store at least one executable instruction, and the executable instruction causes the processor to execute the operations corresponding to the method described in the second aspect above.

[0009] As can be seen from the above solutions, the dynamic weighing system provided by the present invention includes a belt scale, a speed sensor, and an integrator. The integrator can obtain the response duration of the dynamic weighing system during the debugging process of the measuring accuracy, and then determine the supported measuring accuracy of the dynamic weighing system according to the response duration, and determine the measuring accuracy of the integrator according to the supported measuring accuracy, so that the measuring accuracy of the integrator matches the measuring accuracy of the dynamic weighing system, avoiding that the dynamic weighing system cannot reach the expected measuring accuracy, and also avoiding the waste of equipment resources and costs caused by over-selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following will make the above and other features and advantages of the present invention clearer to those of ordinary skill in the art by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. In the drawings:

[0011] Figure 1 FIG. is a schematic structural diagram of a dynamic weighing system provided by an exemplary embodiment of the present invention.

[0012] Figure 2 FIG. is a schematic structural diagram of a dynamic weighing system provided by another exemplary embodiment of the present invention.

[0013] Figure 3 FIG. is a schematic structural diagram of an auxiliary device provided by an exemplary embodiment of the present invention.

[0014] Figure 4 FIG. is a schematic diagram of an integration curve provided by an exemplary embodiment of the present invention.

[0015] Figure 5 FIG. is a schematic diagram of a measuring accuracy recommendation device for an integrator provided by an exemplary embodiment of the present invention.

[0016] Figure 6Schematic structural diagram of the integrator provided for the exemplary embodiment of the present invention.

[0017] List of reference numerals:

[0018] 10: Dynamic weighing system; 11: Belt scale; 12: Speed sensor; 13: Auxiliary device; 14: Integrator; 15: Structural frame of the conveyor; 16: Belt; 17: Idler; 18: Bottom plate of the conveyor; 21: Support frame; 22: Adjusting rod; 23: Electromagnet; 24: Weight; 25: Support plate; 200: Recommended device for the measurement accuracy of the integrator; 201: Control module; 202: Timing module; 203: Recommendation module; 204: Alarm module; 302: Processor; 304: Communication interface; 306: Memory; 308: Communication bus; 310: Program. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the following examples are given to further elaborate on the present invention in detail.

[0020] Please refer to Figure 1 , which shows a dynamic weighing system 10 provided by an embodiment of the present invention. The dynamic weighing system 10 includes: a belt scale 11, a speed sensor 12, and an integrator 14.

[0021] The belt scale 11 is used to measure the weight of the items transported on the conveyor. Among them, the belt scale 11 is placed on the structural frame 15 of the conveyor.

[0022] The speed sensor 12 is used to measure the item transportation speed of the conveyor.

[0023] The integrator 14 is used to obtain the response duration of the dynamic weighing system 10 during the debugging process of the measurement accuracy; determine the supported measurement accuracy of the dynamic weighing system 10 according to the response duration, and determine the measurement accuracy of the integrator 14 according to the supported measurement accuracy.

[0024] The integrator 14 is also used to determine the weight flow rate of the items transported on the conveyor based on the measurement accuracy, according to the weight signal provided by the belt scale 11 and the speed signal provided by the speed sensor 12.

[0025] The entire system includes a structural frame 15 made of steel structure. After the deformation of the structural frame of the steel structure ends, the belt scale 11 can stably output the weight. Therefore, it takes some time for the belt scale 11 to obtain the true weight of the item. Secondly, it also takes some time for the integrator 14 to read the weight signal from the belt scale 11. Therefore, the integrator 14 can start timing at the moment when it starts to read the weight signal, and stop timing when the read weight value is stable, then the response duration is obtained; or, the integrator 14 records the moment when it starts to read the weight signal as the trigger moment, and records the moment when the read weight value is stable as the stable moment, then the response duration is equal to the stable moment minus the trigger moment.

[0026] The measurement accuracy of the entire system depends on two factors: First, the accuracy of instruments such as speed sensors, belt scales, and integrators; Second, the performance of the structural frame of the steel structure at the measurement site. As mentioned above, it will affect the response duration. Therefore, although the accuracy of the instruments is high, the measurement accuracy of the system still cannot reach the highest level. Therefore, the embodiments provided by the present invention can adjust the accuracy through the response duration so that the measurement accuracy of the system can reach the best.

[0027] In the embodiment of the present invention, the dynamic weighing system 10 includes a belt scale 11, a speed sensor 12, and an integrator 14. The integrator 14 can obtain the response duration of the dynamic weighing system 10 during the debugging process of the measurement accuracy, and then determine the supported measurement accuracy of the dynamic weighing system according to the response duration, and further determine the measurement accuracy of the integrator according to the obtained supported measurement accuracy, avoiding that the dynamic weighing system 10 cannot reach the expected measurement accuracy, and also avoiding the waste of hardware resources caused by setting too high measurement accuracy.

[0028] In some other embodiments, a corresponding relationship between the response duration and the accuracy level of the measurement accuracy is set in the integrator 14; the integrator 14 can determine the first accuracy level corresponding to the obtained response duration according to this corresponding relationship, and then use the first accuracy level as the recommended accuracy level and display the recommended accuracy level on the display of the integrator 14. In one example, the recommended accuracy level is the optimal accuracy level recommended for the integrator 14.

[0029] After obtaining the response duration of the dynamic weighing system 10, the integrator 14 can determine the first accuracy level corresponding to the response duration of the dynamic weighing system 10 according to the corresponding relationship between the response duration and the accuracy level of the measurement accuracy. The first accuracy level is the highest accuracy level supported by the integrator 14 at this response duration, and directly use the first accuracy level as the recommended accuracy level.

[0030] Exemplarily, the above correspondence can also be the correspondence between the value range of the response duration and the accuracy level of the measurement accuracy. For example, the value range of the response duration is (TR0, TR1], and its corresponding accuracy level is 1;...; the value range of the response duration is (TR N-1 , TR N , and its corresponding accuracy level is N, where N is a positive integer greater than 1; among them, (TR N-1 , TR N means greater than TR N-1 and less than or equal to TR N . The integrator 14 determines the first accuracy level corresponding to the value range to which the response duration of the dynamic weighing system 10 belongs according to the above correspondence.

[0031] Among them, each accuracy level corresponds to corresponding parameter setting suggestions for the integrator, such as the setting suggestions for the values of the optimal sampling period and the optimal integration period corresponding to the optimal accuracy level.

[0032] In a possible implementation manner, the integrator 14 may use a second accuracy level lower than the first accuracy level as an alternative accuracy level and display the second accuracy level on the display of the integrator 14.

[0033] In the embodiment of the present invention, the integrator 14 displays the recommended accuracy level and the alternative accuracy level on its display, so that the user can select the highest accuracy level actually supported by the integrator 14 for use, or can also select other accuracy levels for use. By dividing multiple accuracy levels for the user to select, the operation of the user to set the measurement accuracy is made more convenient.

[0034] In a possible implementation manner, each accuracy level corresponds to its own sampling period and integration period, and the sampling periods and / or integration periods corresponding to different accuracy levels are different.

[0035] In the embodiment of the present invention, the supported measurement accuracy is used to indicate the minimum sampling period and the minimum integration period actually supported by the integrator 14 in the dynamic weighing system 10. The minimum sampling period is less than or equal to the response duration, and the minimum integration period is greater than or equal to the minimum sampling period.

[0036] The integrator 14 stores the correspondence between the response duration, the minimum sampling period, and the minimum integration period. The integrator 14 can determine the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system 10 according to the above correspondence among the three, and then use the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system 10 as the recommended measurement accuracy and display it on the display of the integrator 14.

[0037] In one example, after determining the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system 10, the integrator 14 may use the value range greater than or equal to the minimum sampling period as the value range of the recommended sampling period; and use the value range greater than or equal to the minimum integration period as the value range of the recommended integration period.

[0038] Considering the user's requirement for measurement accuracy, there is a maximum value for the sampling period and the integration period supported by the integrator 14. For example, the value range greater than or equal to the minimum sampling period and less than or equal to the maximum sampling period supported by the integrator 14 is used as the value range of the recommended sampling period; and the value range greater than or equal to the minimum integration period and less than or equal to the maximum integration period supported by the integrator 14 is used as the value range of the recommended integration period.

[0039] For example, for the response duration TR of the dynamic weighing system 10, the corresponding minimum sampling period is TS _min , and the corresponding minimum integration period is TI _min ; the maximum sampling period supported by the integrator 14 is TS _max , and the maximum integration period supported by the integrator 14 is TI _max , then [TS _min , TS _max is used as the value range of the recommended sampling period, and [TI _min , TI _max is used as the value range of the recommended integration period. The value ranges of the recommended sampling period and the integration period are displayed on the display of the integrator 14, so that the user can refer to the given value ranges of the sampling period and the integration period to set the sampling period and the integration period of the integrator 14, so that the accuracy of the integrator 14 meets the user's requirements. Among them, [TS _min , TS _max means greater than or equal to TS _min and less than or equal to TS _max , [TI _min , TI _max means greater than or equal to TI _min and less than or equal to TI _max .

[0040] Exemplarily, the correspondence between the response duration and the minimum sampling period, and the correspondence between the minimum sampling period and the minimum integration period can be a linear relationship or a non-linear relationship.

[0041] In a possible implementation, the integrator 14 determines whether the supported measurement accuracy reaches the accuracy level (or preset accuracy level) planned in the design. If not, the accuracy level recommended for the integrator 14 and its corresponding setting parameters are set according to the supported measurement accuracy, which can avoid wasting the instrument hardware resources and on-site investment. Exemplarily, after the integrator 14 determines the supported measurement accuracy, it compares the supported measurement accuracy with the target accuracy level (i.e., the accuracy level planned in the design), that is, determines whether the supported measurement accuracy matches the target accuracy level. If the target accuracy level is higher than the supported measurement accuracy, the optimal accuracy level recommended for the integrator 14 is set according to the supported measurement accuracy.

[0042] In a possible implementation, the integrator 14 can control the auxiliary device 13 to place the weight 24 on the belt 16 above the belt scale 11 in response to the start measurement operation triggered on the input device of the integrator 14. For example, the display of the integrator 14 is a touch screen. In response to the start measurement operation triggered on the touch screen, the integrator 14 controls the auxiliary device 13 to place the weight 24 on the belt 16 above the belt scale 11. Alternatively, physical buttons are provided on the integrator 14. In response to the start measurement operation triggered on the physical buttons, the integrator 14 controls the auxiliary device 13 to place the weight 24 on the belt 16 above the belt scale 11.

[0043] Optionally, the belt scale 11 is arranged between two idlers 17. To better support the dynamic weighing of the belt scale 11, if the weighing distance of the belt scale 11 is L, the distance between each idler 17 and the belt scale 11 is set to be L, where L is a positive number.

[0044] In some other embodiments, after the integrator 14 determines the supported measurement accuracy of the dynamic weighing system 10, it compares the currently set measurement accuracy of the integrator 14 with the supported measurement accuracy. If the currently set measurement accuracy is higher than the supported measurement accuracy, an alarm is issued.

[0045] If the currently set measurement accuracy of the integrator 14 is inappropriate, such as the sampling period and / or the integration period being too small. After measuring the supported measurement accuracy, if it is determined that the minimum sampling period actually supported by it is greater than the currently set sampling period, and / or the minimum integration period is greater than the currently set integration period, an alarm is issued, such as playing an alarm audio, and / or an alarm message can also pop up on the display to prompt the user that the dynamic weighing system cannot support the current measurement accuracy and the measurement accuracy of the integrator 14 needs to be adjusted so that the measurement accuracy of the integrator 14 can match the measurement accuracy of the entire dynamic weighing system, and then an accurate weight flow can be output during operation.

[0046] In summary, the dynamic weighing system 10 provided in this embodiment includes a belt scale 11, a speed sensor 12, and an integrator 14. The system also includes an auxiliary device 13. During the debugging process of the measurement accuracy, the integrator 14 can control the auxiliary device 13 to place a heavy block of known weight on the belt 16 above the belt scale 11. Starting from the moment when the heavy block is placed on the belt 16, timing is started, and when the belt scale 11 outputs a stable weight value, the timing is stopped, so as to obtain the response time of the dynamic weighing system 10. The integrator 14 then determines the measurement accuracy actually supported by the integrator 14 according to this response time, and adjusts the measurement accuracy used by the integrator 14 according to the measurement accuracy it actually supports, avoiding the situation where high-precision measurement results with high accuracy cannot be obtained even when high-precision integrator 14, belt scale 11, and speed sensor 12 are selected, thereby avoiding that the dynamic weighing system 10 cannot reach the expected measurement accuracy, and also avoiding the waste of hardware resources caused by the integration period being too small compared with the sampling period.

[0047] Please refer to Figure 2 , in the embodiment of the present invention, the system further includes an auxiliary device 13, and the integrator 14 is configured to control the auxiliary device 13 to place a heavy block of known weight on the belt 16 above the belt scale 11, and start timing from the moment when the heavy block is placed, and stop timing when the belt scale 11 outputs a stable weight value, so as to obtain the response time of the dynamic weighing system 10.

[0048] As Figure 2 shown, the belt scale 11, the speed sensor 12, and the auxiliary device 13 are respectively communicatively connected to the integrator 14. Optionally, the communication connection includes a wired communication connection; and / or a wireless communication connection, such as a wireless local area network, Bluetooth, wireless carrier communication, etc.

[0049] The belt scale 11 is placed below the belt 16, and the auxiliary device 13 is indirectly placed above the belt scale 11. The auxiliary device 13 straddles, for example, both sides of the belt 16 perpendicular to its movement direction through its support frame 12.

[0050] The belt scale 11 is used to measure the weight of the items transported on the belt 16; the speed sensor 12 is used to measure the movement speed of the belt 16, that is, to obtain the item transport speed of the conveyor.

[0051] Please refer to Figure 3 , which shows Figure 2 the structural schematic diagram of the auxiliary device 13 in the dynamic weighing system 10 shown in

[0052] The support frame 21 is fixed on the bottom plate 18 of the conveyor; the adjusting rod 22 is vertically placed on the support frame 21; the electromagnet 23 is fixed at one end of the adjusting rod 22 facing the ground, and the adjusting rod 22 and the electromagnet 23 are located directly above the belt scale 11; the electromagnet 23 is also electrically connected to the integrator 14, so that the electromagnet 23 adsorbs the weight 24 when powered on.

[0053] The adjusting rod 22 can adjust the distance between the weight 24 and the belt when the electromagnet 23 is powered on, so that when the weight 24 contacts the belt, the weight measured by the belt scale 11 is zero.

[0054] The electromagnet 23 can adsorb the weight 24 when the integrator 14 controls it to be powered on, and stop adsorbing the weight 24 when the integrator 14 controls it to lose power, so that the weight 24 freely falls onto the belt 16 above the belt scale 11.

[0055] As Figure 3 shown, the adjusting rod 22 can be a screw rod, and the adjusting rod 22 is connected to the support frame 21 by a screw structure, so that the adjusting rod 22 slides in the vertical direction through rotational movement, and further controls the electromagnet 23 fixed at one end of the adjusting rod 22 to slide in the vertical direction.

[0056] Alternatively, the adjusting rod 22 can also be connected to the support frame 21 through an up-and-down sliding mechanism, so that the adjusting rod 22 slides in the vertical direction, and further controls the electromagnet 23 fixed at one end of the adjusting rod 22 to slide in the vertical direction.

[0057] The electromagnet 23 is electrically connected to the integrator 14. When the integrator 14 powers on the electromagnet 23, the electromagnet 23 adsorbs the weight 24. Exemplarily, the integrator 14 can control the electromagnet 23 to be powered on through a power-on operation triggered on its input device. The integrator 14 controls the electromagnet 23 to be powered on, which can be achieved by controlling the power-on switch of the electromagnet 23.

[0058] After being powered on, the electromagnet 23 adsorbs the weight 24. At this time, the adjusting rod 22 can be adjusted manually, or the integrator 14 can be manually triggered to automatically adjust the adjusting rod 22, so that when the weight 24 contacts the belt, the weight measured by the belt scale 11 is zero, that is, when the weight 24 contacts the belt, and the pressure on the belt scale is zero.

[0059] Optionally, the auxiliary device 13 can also include a support plate 25, and the support plate 25 is placed on the belt 16 above the belt scale 11. When adjusting the distance between the weight 24 and the belt through the adjusting rod 22, the support plate 25 can be in contact and cooperation with the weight 24, and at the same time, the weight measured by the belt scale 11 is zero.

[0060] Place a pallet 25 on the belt 16 above the belt scale 11, and the belt 16 can stably support the pallet 25. One surface of the weight 24 facing downward can be attached to one surface of the pallet 25 facing upward. Exemplarily, the pallet 25 can be an iron plate. The setting of the pallet 25 can better determine a critical state where there is a zero distance between the weight 24 and the pallet 25 and the weight 24 has no pressure on the belt scale 11, such that the placement moment of the weight 24 and the weighing moment of the belt scale 11 are the same moment, enabling the integrator 14 to more accurately measure the actual response duration of dynamic weighing.

[0061] Before weighing the weight 24, it is necessary to remove the weight of the belt 16 above the belt scale 11, or, it is necessary to remove the weights of the belt 16 and the pallet 25 above the belt scale 11, to ensure that the weight signal generated by the weight 24 is collected by the integrator 14.

[0062] Optionally, the integrator 14 can control the electromagnet 23 in the auxiliary device 13 to power off in response to a start measurement operation triggered on the input device of the integrator 14, so that the weight 24 is placed on the belt 16 above the belt scale 11 or on the pallet 25 above the belt scale 11. After adjusting until the weight 24 contacts the belt 16 and the weight measured by the belt scale 11 is zero, the integrator 14 controls the electromagnet 23 in the auxiliary device 13 to power off in response to a start measurement operation triggered on its input device, and receives the weight signal sent by the belt scale 11.

[0063] The position adjustment of the weight 24 and the placement on the pallet 25 can both be automatically controlled and achieved by the integrator 14. For example, after the integrator 14 controls the electromagnet 23 to be energized to adsorb the weight 24, in response to a start measurement operation triggered on its input device, it automatically controls the adjusting rod 22 to lift and lower automatically; after the weight 24 contacts and cooperates with the pallet 25 and there is no weight display on the integrator 14, it automatically controls the electromagnet 23 to power off, so that the weight 24 is stably placed on the pallet 25, starts timing and receives the weight signal sent by the belt scale 11, and stops timing when the weight obtained by the integrator 14 from the belt scale 11 is the known weight of the weight 24, and thus the response duration of the dynamic weighing system 10 can be obtained.

[0064] For the selection of the weight 24, according to the on-site working conditions, first estimate the weight flow range of the items to be transported by the conveyor, and then select a weight 24 of a certain weight according to the estimated weight flow range. In this way, the test results are more in line with the actual situation.

[0065] In summary, the auxiliary device 13 provided in this embodiment can assist the integrator 14 in accurately measuring the response duration of the dynamic weighing system 10 during the debugging process of the measurement accuracy. Furthermore, the integrator 14 can determine the actual supported measurement accuracy of the integrator 14 based on the measured response duration, and adjust the measurement accuracy used by the integrator 14 according to its actual supported measurement accuracy. This avoids the situation where, even when a high-precision integrator 14, belt scale 11, and speed sensor 12 are selected, it is still impossible to obtain high-precision and highly accurate measurement results, and further avoids the dynamic weighing system 10 from failing to achieve the expected measurement accuracy.

[0066] The embodiment of the present invention also provides a method for recommending the measurement accuracy of an integrator. This method is applied to Figures 1 to 3 the integrator 14 of the dynamic weighing system shown in the figure. Unless otherwise specified, the belt scale in the following method embodiments can be the belt scale 11 in the above embodiments, the auxiliary device in the following method embodiments can be the auxiliary device 13 in the above embodiments, the integrator in the following method embodiments can be the integrator 14 in the above embodiments, the weight in the following method embodiments can be the weight 24 in the above embodiments, and the electromagnet in the following method embodiments can be the electromagnet 23 in the above embodiments. The method includes:

[0067] Obtain the response duration of the dynamic weighing system.

[0068] The integrator has the function of measuring the response duration of the dynamic weighing system. Optionally, the integrator controls the auxiliary device in the dynamic weighing system to place a weight of known weight on the belt above the belt scale; start timing from the moment the weight is placed, and stop timing when the belt scale outputs a stable weight value to obtain the response duration of the dynamic weighing system.

[0069] a) The integrator controls the auxiliary device in the dynamic weighing system to place a weight of known weight on the belt above the belt scale.

[0070] When the weight is in contact with the belt above the belt scale and the pressure of the weight on the belt scale is zero, the integrator controls the auxiliary device to place the weight on the belt above the belt scale.

[0071] Optionally, in response to the start measurement operation triggered on its input device, the integrator controls the auxiliary device to place the weight on the belt above the belt scale. For example, the display of the integrator is a touch screen, and in response to the start measurement operation triggered on the touch screen, the integrator controls the auxiliary device to place the weight on the belt above the belt scale. Or, there are physical buttons on the integrator, and in response to the start measurement operation triggered on the physical buttons, the integrator controls the auxiliary device to place the weight on the belt above the belt scale.

[0072] When the electromagnet in the integrator control auxiliary device is energized, the electromagnet adsorbs the weight block; when the integrator starts measuring, it controls the electromagnet to be de-energized, so that the weight block is placed on the belt above the belt scale.

[0073] Optionally, as Figure 3 shown, the auxiliary device 13 further includes: a support plate 25, which is placed on the belt above the belt scale 11; when the weight block 24 is in contact and cooperation with the support plate 25 and the pressure of the weight block 24 on the belt scale 11 is zero, the integrator 14 controls the auxiliary device 13 to place the weight block 24 on the support plate 25. For example, when the integrator starts measuring, it controls the electromagnet 23 to be de-energized, so that the weight block 24 is placed on the support plate 25.

[0074] In some embodiments, before the integrator 14 places the weight block 24 with a known weight on the belt or the support plate 25 above the belt scale 11, it can also automatically control the adjusting rod 22 to slide in the vertical direction, so that the weight block 24 is in contact and cooperation with the belt or the support plate 25 and the pressure of the weight block 24 on the belt scale 11 is zero.

[0075] Before the belt scale 11 weighs the weight block 24, it is necessary to remove the weight of the belt above the belt scale 11, or it is necessary to remove the weight of the belt and the support plate 25 above the belt scale 11, so as to ensure that the weight signal collected by the integrator 14 is the weight signal generated by the weight block 24.

[0076] b) Start timing from the moment when the weight block is placed, and stop timing when the belt scale outputs a stable weight value to obtain the response duration of the dynamic weighing system.

[0077] The whole system also includes a structural frame made of steel structure. After the deformation of the structural frame of the steel structure is completed, the belt scale 11 can stably output the weight. Therefore, it takes some time for the belt scale 11 to obtain the true weight of the item; secondly, it also takes some time for the integrator 14 to read the weight signal from the belt scale 11. Therefore, the integrator 14 can start timing at the moment when it starts to read the weight signal, and stop timing when the read weight value is stable, then the response duration is obtained; or, the integrator 14 records the moment when it starts to read the weight signal as the trigger moment, and records the moment when the read weight value is stable as the stable moment, then the response duration is equal to the stable moment minus the trigger moment.

[0078] Determine the supported measurement accuracy of the dynamic weighing system according to the response duration, and recommend the set measurement accuracy according to the supported measurement accuracy.

[0079] Among them, the supported measurement accuracy is used to indicate the minimum sampling period and the minimum integration period actually supported by the dynamic weighing system; among them, the minimum sampling period is less than or equal to the response duration, and the minimum integration period is greater than or equal to the minimum sampling period.

[0080] Optionally, a correspondence relationship between the response duration and the accuracy level of the measurement accuracy is set in the integrator; the integrator can determine the first accuracy level corresponding to the obtained response duration according to this correspondence relationship, and then use the first accuracy level as the recommended accuracy level and display the recommended accuracy level on the display of the integrator. In one example, the recommended accuracy level is the optimal accuracy level recommended for the integrator. Wherein, the first accuracy level may be the highest accuracy level matched by the integrator under the response duration of the dynamic weighing system.

[0081] Exemplarily, the above correspondence relationship may also be a correspondence relationship between the value range of the response duration and the accuracy level of the measurement accuracy. For example, the value range of the response duration is (TR0, TR1], and its corresponding accuracy level is 1;...; the value range of the response duration is (TR N-1 , TR N , and its corresponding accuracy level is N, where N is a positive integer greater than 1; wherein, (TR N-1 , TR N means greater than TR N-1 and less than or equal to TR N . The integrator determines the first accuracy level corresponding to the value range to which the response duration of the dynamic weighing system belongs according to the above correspondence relationship.

[0082] The integrator can also use the second accuracy level lower than the first accuracy level as the alternative accuracy level and display the second accuracy level on the display of the integrator. That is, the integrator displays the recommended accuracy level and the alternative accuracy level on its display, so that the user can choose to use the highest accuracy level actually supported by the integrator, or can also choose other accuracy levels to use; and the selection of the measurement accuracy by dividing the levels makes the operation of the user to set the measurement accuracy simpler.

[0083] Exemplarily, each accuracy level corresponds to its own sampling period and integration period, and the sampling periods and / or integration periods corresponding to different accuracy levels are different.

[0084] Optionally, a correspondence relationship among the response duration, the minimum sampling period, and the minimum integration period is stored in the integrator. The integrator can determine the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system according to the correspondence relationship among the above three, and then use the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system as the recommended measurement accuracy and display it on the display of the integrator.

[0085] Optionally, after determining the minimum sampling period and the minimum integration period corresponding to the response duration of the dynamic weighing system, the integrator may use the value range greater than or equal to the minimum sampling period as the value range of the recommended sampling period; and use the value range greater than or equal to the minimum integration period as the value range of the recommended integration period.

[0086] Considering the user's requirement for measurement accuracy, there is a maximum value for the sampling period and the integration period supported by the integrator. For example, use the value range that is greater than or equal to the minimum sampling period and less than or equal to the maximum sampling period supported by the integrator as the value range of the recommended sampling period; and use the value range that is greater than or equal to the minimum integration period and less than or equal to the maximum integration period supported by the integrator as the value range of the recommended integration period.

[0087] For example, for the response duration TR of the dynamic weighing system, the corresponding minimum sampling period is TS _min , and the corresponding minimum integration period is TI _min ; the maximum sampling period supported by the integrator is TS _max , and the maximum integration period supported by the integrator is TI _max , then use [TS _min , TS _max as the value range of the recommended sampling period, and use [TI _min , TI _max as the value range of the recommended integration period, and display the value ranges of the recommended sampling period and the recommended integration period on the display of the integrator, so that the user can refer to the given value ranges of the sampling period and the integration period to set the sampling period and the integration period of the integrator, so that the accuracy of the integrator 14 meets the user's requirements. Among them, [TS _min , TS _max means greater than or equal to TS _min and less than or equal to TS _max , [TI _min , TI _max means greater than or equal to TI _min and less than or equal to TI _max .

[0088] Exemplarily, the correspondence between the response duration and the minimum sampling period, and the correspondence between the minimum sampling period and the minimum integration period can be a linear relationship, or can also be a non-linear relationship.

[0089] In some embodiments, after determining the supported measurement accuracy, the integrator compares the currently set measurement accuracy of the integrator with the supported measurement accuracy; if the currently set measurement accuracy is higher than the supported measurement accuracy, an alarm is issued. That is, if the currently set measurement accuracy of the integrator is inappropriate, such as the sampling period and / or the integration period being too small, after obtaining the supported measurement accuracy, it is determined that the actual minimum supported sampling period is greater than the currently set sampling period, and / or the minimum integration period is greater than the currently set integration period, then an alarm is issued, such as playing an alarm audio, and / or an alarm message can also be popped up on the display to prompt the user that the dynamic weighing system cannot support the current measurement accuracy and the measurement accuracy of the integrator 14 needs to be adjusted so that the measurement accuracy of the integrator 14 can match the measurement accuracy of the entire dynamic weighing system, thereby enabling an accurate weight flow to be output during operation.

[0090] In summary, for the method for recommending the measurement accuracy of the integrator provided in this embodiment, during the debugging process of the measurement accuracy, the integrator obtains the response time of the dynamic weighing system, and then determines the supported measurement accuracy of the dynamic weighing system based on this response time, so as to adjust the measurement accuracy used by the integrator according to its supported measurement accuracy, enabling the measurement accuracy of the integrator to match the measurement accuracy of the dynamic weighing system. This avoids the situation where, even when high-precision integrators, belt scales, and speed sensors are selected, high-precision and highly accurate measurement results cannot be obtained, thereby avoiding the dynamic weighing system being unable to achieve the expected measurement accuracy and also avoiding the waste of hardware resources caused by the integration period being too small compared to the sampling period.

[0091] In addition, assuming that the result of dynamic weighing of the belt scale is Mass, with the unit of kilograms (kg), and the length of the weighing section of the system (or the distance between two adjacent idlers) is L, with the unit of meters (m), then the load per unit length of the weighing section of the system Load = Mass / L, with the unit of kilograms per meter (kg / m); the speed measured by the speed sensor is Speed, with the unit of meters per second (m / s). Based on Speed and Load, the weight flow Flowrate of the items transported on the conveyor can be calculated as: Flowrate = Load × Speed, with the unit of kilograms per second (kg / s). As Figure 4 shown, it is the change curve of Flowrate over a period of time. The integrator integrates this change curve to obtain the weight of the items per unit time, that is, the weight flow.

[0092] Generally, the structural stiffness of the belt system affects the response time during the dynamic weighing of the belt scale. When the stiffness is low, the response time is long; when the stiffness is high, the response time is short. If the response time is large, the weight of the item on the belt 16 above the belt scale 11 cannot be accurately measured by the belt scale 11 in a timely manner. If the sampling period of the weight signal from the belt scale by the integrator is greater than the response time of the dynamic weighing system, it will affect the accuracy of the curve, thereby reducing the accuracy of the final integration result. If the sampling period is too small compared to the response time, and / or the integration period is too small compared to the sampling period, it will also cause a waste of a large amount of hardware resources.

[0093] Therefore, in the above embodiments, the response time during the weighing by the belt scale is used to characterize the influence of the structural stiffness of the belt system on the measurement accuracy. By measuring the response time, the corresponding sampling period and integration period are matched for the integrator, so that the entire dynamic weighing system reaches the highest operating state, ensuring the relatively high measurement accuracy of the dynamic weighing system, and at the same time avoiding the waste of hardware resources caused by too small sampling period and / or integration period.

[0094] To adjust the overall measurement accuracy of the dynamic weighing system, the adjusted measurement accuracy can be recommended for the integrator as described in the above embodiments; it is also possible to display the suggestion of adjusting the structural stiffness of the belt system on the display of the integrator. For example, there is a corresponding relationship between the response time and the structural stiffness of the belt system in the integrator, and according to this corresponding relationship, the minimum structural stiffness corresponding to the actual response time can be determined, and the content of suggesting to adjust the structural stiffness of the belt system to the minimum structural stiffness and above can be displayed on the display of the integrator. Finally, the measurement accuracy of the dynamic weighing system is improved and the waste of hardware resources is avoided by adjusting the measurement accuracy of the integrator and / or adjusting the structural stiffness of the belt system.

[0095] Figure 5 It is a schematic diagram of a device 200 for recommending the measurement accuracy of an integrator provided by an embodiment of the present invention. The device is applied to the integrator 14 of the dynamic weighing system as described in the above Figures 1 - 3 embodiments shown. The device includes:

[0096] A timing module 202, configured to obtain the response time of the dynamic weighing system 10;

[0097] A recommendation module 203, configured to determine the supported measurement accuracy of the dynamic weighing system 10 according to the response time, and recommend the set measurement accuracy according to the supported measurement accuracy.

[0098] In some embodiments, the dynamic weighing system 10 further includes an auxiliary device 13; the device further includes a control module 201;

[0099] The control module 201 is configured to control the auxiliary device 13 to place a weight 24 of a known weight onto the belt of the belt scale 11 above the belt scale 11.

[0100] The timing module 202 is configured to start timing from the moment when the weight 24 is placed and stop timing when the belt scale 11 outputs a stable weight value, so as to obtain the response duration of the dynamic weighing system 10.

[0101] In some embodiments, a correspondence relationship between the response duration and the accuracy level of the measurement accuracy is set in the integrator 14;

[0102] The recommendation module 203 is configured to determine a first accuracy level corresponding to the response duration according to the correspondence relationship; and use the first accuracy level as the recommended accuracy level and display it on the display of the integrator 14.

[0103] In some embodiments, the recommendation module 203 is configured to use a second accuracy level lower than the first accuracy level as an alternative accuracy level and display it on the display of the integrator 14.

[0104] In some embodiments, the supported measurement accuracy is used to indicate the minimum sampling period and the minimum integration period actually supported by the dynamic weighing system 10; wherein, the minimum sampling period is less than or equal to the actual response duration, and the minimum integration period is greater than or equal to the minimum sampling period.

[0105] In some embodiments, the device further includes an alarm module 204;

[0106] The alarm module 204 is configured to, after determining the supported measurement accuracy, compare the current measurement accuracy of the integrator 14 with the supported measurement accuracy; if the current measurement accuracy is higher than the supported measurement accuracy, an alarm is issued.

[0107] Figure 6 It is a schematic block diagram of an integrator 14 provided by an embodiment of the present invention. The specific implementation of the integrator 14 is not limited in the specific embodiments of the present invention. As Figure 6 shown, the integrator 14 may include: a processor 302, a communication interface 304, a memory 306, and a communication bus 308. Wherein:

[0108] The processor 302, the communication interface 304, and the memory 306 communicate with each other through the communication bus 308.

[0109] The communication interface 304 is configured to communicate with other electronic devices or servers.

[0110] The processor 302 is configured to execute the program 310, and specifically may execute the relevant steps in any of the foregoing embodiments.

[0111] Specifically, the program 310 may include program code that includes computer operation instructions.

[0112] The processor 302 may be a CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention. One or more processors included in the intelligent device may be of the same type of processor, such as one or more CPUs; or may be of different types of processors, such as one or more CPUs and one or more ASICs.

[0113] RISC-V is an open-source instruction set architecture based on the reduced instruction set (RISC) principle, which can be applied to various aspects such as single-chip microcontrollers and FPGA chips. Specifically, it can be applied in the fields of Internet of Things security, industrial control, mobile phones, personal computers, etc. And because it takes into account the reality of small size, fast speed, and low power consumption in its design, it is especially suitable for modern computing devices such as warehouse-scale cloud computers, high-end mobile phones, and tiny embedded systems. With the rise of the artificial intelligence Internet of Things AIoT, the RISC-V instruction set architecture has also received more and more attention and support, and is expected to become the next-generation widely used CPU architecture.

[0114] The computer operation instructions in the embodiments of the present invention may be computer operation instructions based on the RISC-V instruction set architecture. Correspondingly, the processor 302 may be designed based on the RISC-V instruction set. Specifically, the chip of the processor in the electronic device provided by the embodiments of the present invention may be a chip designed using the RISC-V instruction set. The chip can execute executable code based on the configured instructions, thereby implementing the measurement accuracy recommendation method of the integrator in the above embodiments.

[0115] The memory 306 is used to store the program 310. The memory 306 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.

[0116] The program 310 is specifically used to cause the processor 302 to execute the method in any of the foregoing embodiments.

[0117] For the specific implementation of each step in the program 310, reference may be made to the corresponding steps and descriptions in the corresponding units in any of the foregoing method embodiments, which will not be elaborated herein. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding process descriptions in the foregoing method embodiments, which will not be repeated herein.

[0118] The present invention also provides a computer-readable storage medium storing instructions for causing a machine to execute the measurement accuracy recommendation method of the integrator as described herein. Specifically, a system or device equipped with the storage medium may be provided, on which software program codes for implementing the functions of any one of the above-described embodiments are stored, and the computer (or CPU or MPU) of the system or device is caused to read and execute the program codes stored in the storage medium.

[0119] In this case, the program code read from the storage medium itself can implement the functions of any one of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0120] Examples of the storage medium for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, a DVD-RW, a DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer via a communication network.

[0121] The embodiments of the present invention also provide a computer program product including computer instructions that direct a computing device to perform any corresponding operation in the above-described method embodiments.

[0122] It should be noted that, according to the needs of implementation, each component / step described in the embodiments of the present invention may be split into more components / steps, or two or more components / steps or parts of the operations of the components / steps may be combined into new components / steps to achieve the purpose of the embodiments of the present invention.

[0123] The methods according to the embodiments of the present invention described above may be implemented in hardware, firmware, or be implemented as software or computer code that can be stored in a recording medium (such as a CD ROM, a RAM, a floppy disk, a hard disk, or a magneto-optical disk), or be implemented as computer code originally stored in a remote recording medium or a non-transitory machine-readable medium and downloaded via a network and to be stored in a local recording medium, so that the methods described herein can be stored in such software processes on a recording medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware (such as an ASIC or an FPGA). It will be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component (such as a RAM, a ROM, a flash memory, etc.) that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the methods described herein are implemented. In addition, when a general-purpose computer accesses the code for implementing the methods shown herein, the execution of the code converts the general-purpose computer into a dedicated computer for executing the methods shown herein.

[0124] Those of ordinary skill in the art can realize that the units and method steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of the present invention.

[0125] In this application, nouns and pronouns related to people are not limited to a specific gender.

[0126] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dynamic weighing system, characterized in that, The dynamic weighing system includes: A belt scale (11) for measuring the weight of the articles conveyed on the conveyor. Among them, the belt scale (11) is placed on the structural frame (15) of the conveyor; A speed sensor (12) for measuring the article conveying speed of the conveyor; An integrator (14) for obtaining the response duration of the dynamic weighing system during the debugging of the measurement accuracy, determining the supported measurement accuracy of the dynamic weighing system according to the response duration, and determining the measurement accuracy of the integrator (14) according to the supported measurement accuracy; The integrator (14) is further configured to determine the weight flow rate of the articles conveyed on the conveyor based on the measurement accuracy, according to the weight signal provided by the belt scale (11) and the speed signal provided by the speed sensor (12).

2. The dynamic weighing system according to claim 1, wherein The dynamic weighing system further includes an auxiliary device (13). The integrator (14) is configured to control the auxiliary device (13) to place a weight block (24) of a known weight onto the belt (16) above the belt scale (11), start timing from the moment when the weight block (24) is placed, and stop timing when the belt scale (11) outputs a stable weight value, so as to obtain the response duration of the dynamic weighing system.

3. The dynamic weighing system according to claim 1, wherein A corresponding relationship between the response duration and the accuracy level of the measurement accuracy is set in the integrator (14); The integrator (14) is configured to determine the first accuracy level corresponding to the response duration according to the corresponding relationship; and use the first accuracy level as the recommended accuracy level and display it on the display of the integrator (14).

4. The dynamic weighing system according to claim 1, characterized in that, The supported measurement accuracy is used to indicate the minimum sampling period and the minimum integration period actually supported by the integrator (14) in the dynamic weighing system; wherein, the minimum sampling period is less than or equal to the response duration, and the minimum integration period is greater than or equal to the minimum sampling period.

5. The dynamic weighing system according to claim 1, wherein The integrator (14) is further configured to, after determining the supported measurement accuracy, compare the current measurement accuracy of the integrator (14) with the supported measurement accuracy; if the current measurement accuracy is higher than the supported measurement accuracy, an alarm is issued.

6. The dynamic weighing system according to claim 2, characterized in that, The auxiliary device (13) includes: a support frame (21), an adjusting rod (22), an electromagnet (23) and the weight block (24); The support frame (21) is fixed on the bottom plate (18) of the conveyor; the adjusting rod (22) is placed vertically on the support frame (21); the electromagnet (23) is fixed at the end of the adjusting rod (22) facing the ground, and the adjusting rod (22) and the electromagnet (23) are located directly above the belt scale (11); the electromagnet (23) is electrically connected to the integrator (14), so that the electromagnet (23) attracts the weight block (24) when energized; The adjusting rod (22) is used to adjust the distance between the weight (24) and the belt when the electromagnet (23) is powered on, so that when the weight (24) contacts the belt, the weight measured by the belt scale (11) is zero; The electromagnet (23) is used to adsorb the weight (24) when the integrator (14) controls its power-on, and stop adsorbing the weight (24) when losing power under the control of the integrator (14), so that the weight (24) freely falls onto the belt (16) above the belt scale (11).

7. The dynamic weighing system according to claim 6, characterized in that, The auxiliary device (13) includes: a support plate (25), and the support plate (25) is placed on the belt above the belt scale (11); The support plate (25) is used to contact and cooperate with the weight (24) when adjusting the distance between the weight (24) and the belt through the adjusting rod (22), and at the same time the weight measured by the belt scale (11) is zero.

8. A method for recommending the measurement accuracy of an integrator, characterized in that, The recommended method for the measurement accuracy of the integrator is applied to the integrator (14) included in the dynamic weighing system according to any one of claims 1-7, and the method includes: Obtaining the response duration of the dynamic weighing system; Determining the supported measurement accuracy of the dynamic weighing system according to the response duration, and recommending the set measurement accuracy according to the supported measurement accuracy.

9. The method for recommending the measurement accuracy of an integrator according to claim 8, characterized in that, The dynamic weighing system further includes an auxiliary device (13), and obtaining the response duration of the dynamic weighing system further includes: Controlling the auxiliary device (13) to place a weight (24) of a known weight onto the belt above the belt scale (11); Starting timing from the moment when the weight (24) is placed, and stopping timing when the belt scale (11) outputs a stable weight value, so as to obtain the response duration of the dynamic weighing system.

10. The method for recommending the measurement accuracy of an integrator according to claim 8, characterized in that, A corresponding relationship between the response duration and the accuracy level of the measurement accuracy is set in the integrator (14); Determining the supported measurement accuracy of the dynamic weighing system according to the response duration, and recommending the set measurement accuracy according to the supported measurement accuracy, includes: Determining the first accuracy level corresponding to the response duration according to the corresponding relationship; Taking the first accuracy level as the recommended accuracy level and displaying it on the display of the integrator (14).

11. A measuring accuracy recommendation device for an integrator, characterized in that, Applied to the integrator (14) included in the dynamic weighing system according to any one of claims 1-7, the measurement accuracy recommendation device of the integrator includes: A timing module (202) for obtaining the response duration of the dynamic weighing system; A recommendation module (203) for determining the supported measurement accuracy of the dynamic weighing system according to the response duration and recommending the set measurement accuracy according to the supported measurement accuracy.

12. An integrator, characterized in that, The integrator includes: a processor (302), a memory (306), a communication interface (304) and a communication bus (308), and the processor (302), the memory (306) and the communication interface (304) complete mutual communication through the communication bus (308); The memory (306) is used to store at least one instruction that causes the processor (302) to perform operations corresponding to the measurement accuracy recommendation method of the integrator described in any one of claims 8-10.

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