Automatic calibration device for hopper scale
By designing the automatic calibration device of the hopper scale, using the shock absorber and weight unloading structure, the problem of low metering accuracy of the hopper scale in the vibration environment is solved, and high-precision metering and meeting the requirements of the unloader's productivity are achieved.
Patent Information
- Application Number
- CN202421132305.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing hopper scales have low metrological accuracy in vibrating environments and cannot meet the commercial metrological settlement requirements of 0.25 to 0.5%. At the same time, the low-frequency vibration causes the unloader productivity to be low.
An automatic calibration device for hopper scales is designed, including a support body, a weighing sensor, a hopper and a weight loading and unloading structure. By placing the weighing sensor on the shock absorbing device and using the loading and unloading of standard weights, error correction is performed using the comparison method to calculate the accurate weighing value of the hopper.
It effectively eliminates the impact of vibration environment on metrology, improves the metrology accuracy of the hopper scale, meets the commercial metrology settlement requirements, and maintains the rated productivity of the ship unloader.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measuring instruments, in particular to an automatic calibration device for a hopper scale. Background Art
[0002] At present, bulk cargo unloading at the dock is mostly measured by electronic belt scales and grab scales, and there are also very few ways to measure by weighing hoppers. Continuous dynamic measurement, the theoretical measurement accuracy can reach 0.5%, but it is easily affected by the external environment, the zero drift after calibration is relatively large, the actual measurement accuracy is much greater than 0.5%, and it cannot be used as a basis for commercial settlement. The grab shakes a lot during the operation, and the grab scale is mostly used as a load-limiting device. Its measurement accuracy is a certain distance from the commercial measurement accuracy requirements.
[0003] There are low-frequency vibrations in the weighing equipment during use. The current weighing sensors are not sufficient to filter out low-frequency signals. The ship unloader needs to stop working during the metering process. Weighing and measurement are performed only after the ship unloader is stable and the low-frequency signals are eliminated. As a result, the productivity of the ship unloader during the metering process is far less than its rated productivity.
[0004] With the increasingly fierce competition in bulk cargo logistics ports, the measurement accuracy of the above-mentioned measurement methods makes it difficult for buyers and sellers to bear. In order to save costs and achieve fairness, there is an urgent need for a high-precision measurement equipment that can meet the rated productivity of the ship unloader.
[0005] In response to market demand, port machinery manufacturers have long hoped to measure the unloading cargo through the ship unloader's own mechanism or device, with a measurement accuracy that meets the national statutory commercial measurement settlement requirements of 0.25-0.5%, and meets the rated production efficiency of the ship unloader design without changing the main design parameters of the ship unloader itself.
[0006] When weighing, the hopper scale is installed in a vibration environment of a mobile device or port. Due to the influence of the vibration environment or equipment, the reading of the hopper scale fluctuates, the measurement error is large, and accurate measurement cannot be achieved. Therefore, the accuracy of measurement can be guaranteed by reducing the influence of vibration frequency and amplitude and measuring in the same time period. The method of implementation is to place the weighing sensor on the shock absorbing device, use the loading and unloading measurement of standard weights under the same vibration environment conditions, use the comparison method to correct the error, and calculate the accurate weighing value of the hopper weighing value, so as to meet the requirements for improving the weighing accuracy of the hopper scale in the vibration environment. Utility Model Content
[0007] In order to achieve the above-mentioned purpose, the automatic hopper scale calibration device proposed in the utility model comprises:
[0008] Support body;
[0009] A weighing sensor is fixedly arranged on the support body;
[0010] a hopper, aligned with the weighing sensor and mounted on the support body; and
[0011] The weight loading and unloading structure includes a lifting rod which can move in the up and down directions. When the lifting rod moves upward, the weight moves upward along with the lifting rod. When the lifting rod moves downward, the weight can drop downward to a designated workstation.
[0012] Optionally, the automatic calibration device for a hopper scale further comprises a vibration reduction device, and the vibration reduction device is arranged between the support body and the weighing sensor.
[0013] Optionally, the hopper and the weighing sensor are fixedly connected via a mounting platform.
[0014] Optionally, a pressure head is provided between the mounting platform and the weighing sensor.
[0015] Optionally, the number of the weighing sensors is greater than or equal to 3, the weighing sensors are evenly distributed on the outer peripheral side of the hopper, a plurality of the weighing sensors are connected in parallel, and the weighing sensors are connected in parallel in the junction box via cables.
[0016] Optionally, the automatic calibration device for the hopper scale further includes a weighing meter, which is connected to the weighing sensor and is used to receive a signal from the weighing sensor.
[0017] Optionally, the automatic calibration device for the hopper scale further includes a host computer, and the host computer is electrically connected to the weighing instrument.
[0018] Optionally, the automatic calibration device for the hopper scale further includes a controller, wherein the controller is electrically connected to the weight loading and unloading structure, and the controller is electrically connected to the weighing sensor.
[0019] Optionally, the automatic calibration device for the hopper scale also includes a lifting device, which includes a lifting rod and a weight. The lifting rod and the weight are matched in a V shape, and the controller controls the lifting rod to rise. The V-shaped surface on the lifting rod contacts the V-shaped surface on the weight, and the lifting rod lifts the weight until the weight is lifted to a specified height h, and the weight is placed on the specified workstation.
[0020] The technical solution provided by the utility model proposes an automatic calibration device for a hopper scale, including a support body, a weighing sensor, a hopper, and a weight loading and unloading structure, wherein the weighing sensor is fixedly arranged on the support body, and the hopper is aligned with the weighing sensor and installed on the support body, and the weight loading and unloading structure includes a lifting rod, which can move in the up and down directions, and when the lifting rod moves upward, the weight moves upward with the lifting rod, and when the lifting rod moves downward, the weight can drop downward to a designated work station. Furthermore, it can greatly eliminate or reduce the error caused to the system by the vibration and wind force at the site of the hopper scale, and realize high-precision measurement of the hopper scale. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the hopper scale automatic calibration device provided by the utility model;
[0023] Figure 2 This is a schematic diagram of adding and unloading weights of the utility model;
[0024] Figure 3 This is the schematic diagram of the measurement of the automatic calibration device for the hopper scale.
[0025] Description of Figure Numbers:
[0026] Label name Label name 100 Automatic calibration device for hopper scale 5 Vibration reduction device 1 Support 6 Weighing Instrument 11 Pressure head 7 Host computer 2 Load Cells 8 Controller 3 hopper 9 Weights 4 Lifting rod 10 Junction Box
[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain the position of the user in a certain posture (such as the attached Figure 1 The relative position relationship, movement status, etc. between the various components under the specific posture are shown. If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0031] Previously, bulk cargo unloading at the dock was mostly measured by electronic belt scales and grab scales, and there were also very few weighing hoppers. Continuous dynamic measurement, the theoretical measurement accuracy can reach 0.5%, but it is easily affected by the external environment, the zero drift after calibration is relatively large, the actual measurement accuracy is much greater than 0.5%, and it cannot be used as a basis for commercial settlement. The grab shakes a lot during the operation, and the grab scale is mostly used as a load-limiting device. Its measurement accuracy is a certain distance from the commercial measurement accuracy requirements.
[0032] There are low-frequency vibrations in the weighing equipment during use. The current weighing sensors are not sufficient to filter out low-frequency signals. The ship unloader needs to stop working during the metering process. Weighing and measurement are performed only after the ship unloader is stable and the low-frequency signals are eliminated. As a result, the productivity of the ship unloader during the metering process is far less than its rated productivity.
[0033] With the increasingly fierce competition in bulk cargo logistics ports, the measurement accuracy of the above-mentioned measurement methods makes it difficult for buyers and sellers to bear. In order to save costs and achieve fairness, there is an urgent need for a high-precision measurement equipment that can meet the rated productivity of the ship unloader.
[0034] In response to market demand, port machinery manufacturers have long hoped to measure the unloading cargo through the ship unloader's own mechanism or device, with a measurement accuracy that meets the national statutory commercial measurement settlement requirements of 0.25-0.5%, and meets the rated production efficiency of the ship unloader design without changing the main design parameters of the ship unloader itself.
[0035] When weighing, the hopper scale is installed in a vibration environment of a mobile device or port. Due to the influence of the vibration environment or equipment, the reading of the hopper scale fluctuates, the measurement error is large, and accurate measurement cannot be achieved. Therefore, the accuracy of measurement can be guaranteed by reducing the influence of vibration frequency and amplitude and measuring in the same time period. The method of implementation is to place the weighing sensor on the shock absorbing device, use the loading and unloading measurement of standard weights under the same vibration environment conditions, use the comparison method to correct the error, and calculate the accurate weighing value of the hopper weighing value, so as to meet the requirements for improving the weighing accuracy of the hopper scale in the vibration environment.
[0036] In view of this, the utility model provides an automatic calibration device for a hopper scale. Figures 1 to 3 It is a schematic diagram of an embodiment of the automatic calibration device for hopper scale.
[0037] See also Figure 1 The automatic calibration device 100 for the hopper 3 scale includes a support body 1, a weighing sensor 2, a hopper 3 and a loading and unloading structure for a weight 9. The weighing sensor 2 is fixedly arranged on the support body 1. The hopper 3 is aligned with the weighing sensor 2 and installed on the support body 1. The loading and unloading structure for the weight 9 includes a lifting rod 4. The lifting rod 4 can move in the up and down directions. When the lifting rod 4 moves upward, the weight 9 moves upward with the lifting rod 4. When the lifting rod 4 moves downward, the weight 9 can drop downward to a designated workstation.
[0038] The technical solution provided by the utility model proposes an automatic calibration device 100 for a hopper 3 scale, including a support body 1, a weighing sensor 2, a hopper 3 and a weight 9 loading and unloading structure, wherein the weighing sensor 2 is fixedly arranged on the support body 1, and the hopper 3 is aligned with the weighing sensor 2 and installed on the support body 1, and the weight 9 loading and unloading structure includes a lifting rod 4, which can move in the up and down directions, and when the lifting rod 4 moves upward, the weight 9 moves upward with the lifting rod 4, and when the lifting rod 4 moves downward, the weight 9 can drop downward to a designated work station. Furthermore, it can greatly eliminate or reduce the error caused to the system by the vibration and wind force at the site of use of the hopper 3 scale, and realize high-precision measurement of the hopper 3 scale.
[0039] In this embodiment, a vibration reduction device 5 is also proposed. The vibration reduction device 5 is mainly used to reduce the interference of external vibration on the weighing sensor 2. External vibration can cause errors in the weighing sensor 2 and affect the weighing accuracy, and the vibration reduction device 5 can effectively reduce such interference and ensure the stability and accuracy of the weighing system. By absorbing, isolating or suppressing external vibration, the vibration reduction device 5 can improve the working efficiency of the weighing sensor 2 and play an important role in industrial production, laboratory testing and other fields.
[0040] Furthermore, the hopper 3 and the weighing sensor 2 are fixedly connected via a mounting platform, ensuring that the hopper 3 and the weighing sensor 2 are on the same plane and can directly transfer weight.
[0041] Furthermore, a pressure head 11 is arranged between the mounting platform and the weighing sensor 2. The setting of the pressure head 11, wherein the pressure head 11 is an instrument component, is mainly used to measure the hardness of a material. The pressure head 11 made of materials such as diamond, cemented carbide, and hard steel measures the hardness and the indentation resistance by pressing pressure into the metal surface.
[0042] In addition, the number of the weighing sensors 2 is greater than or equal to 3, the weighing sensors 2 are evenly distributed on the outer peripheral side of the hopper 3, and the multiple weighing sensors 2 are connected in parallel, and the weighing sensors 2 are connected in parallel in the junction box 10 through cables. By using the multiple weighing sensors 2 in combination, the weight of the object can be detected in multiple directions at different positions and angles, thereby improving the precision and accuracy of weighing. The multiple weighing sensors 2 can be used in combination to expand the weighing range, meet the weighing requirements of objects of different weights, and improve the applicability of the weighing equipment. The multiple weighing sensors 2 can cooperate with each other to balance the errors between the sensors, improve the stability and reliability of the weighing system, and avoid the error accumulation problem that may exist in a single sensor.
[0043] The automatic calibration device 100 for the hopper 3 scale also includes a weighing meter 6, which is connected to the weighing sensor 2 and is used to receive the signal of the weighing sensor 2. Through the connection between the weighing sensor 2 and the weighing meter 6, high-precision weight measurement can be achieved, and it is convenient for users to intuitively understand the weight information of the object. This connection method can also make the weighing meter 6 have better stability and reliability, ensuring the accuracy and reliability of the measurement results. Therefore, the connection between the weighing meter 6 and the weighing sensor 2 is a key link in realizing the weight measurement function.
[0044] Further, the automatic calibration device 100 for the hopper 3 scale also includes a host computer 7, which is electrically connected to the weighing instrument 6. The connection between the host computer 7 and the weighing instrument 6 is usually used for data transmission and control. By connecting to the host computer 7, the user can realize remote monitoring, data collection, parameter setting and other operations of the weighing instrument 6, thereby improving work efficiency and convenience. Specifically, the host computer 7 can receive data transmitted by the weighing instrument 6 in real time, such as weight measurement values, stable state, etc., and record and store these data for subsequent analysis and viewing. Remote monitoring, through the connection of the host computer 7, the user can monitor the working status and measurement results of the weighing instrument 6 at a remote location, understand the production situation in time and make necessary adjustments. Parameter setting and control, the host computer 7 connection can also be used to set the working parameters of the weighing instrument 6, such as calibration coefficients, unit settings, etc., and perform control operations, such as starting / stopping measurement, adjusting instrument sensitivity, etc. Data analysis and report generation: The host computer 7 connection enables the weighing data to be imported into specialized software for further analysis and processing, generating reports, trend analysis, etc., to help users make more accurate decisions.
[0045] In addition, the automatic calibration device 100 for the hopper 3 scale also includes a controller 8, which is electrically connected to the weight 9 loading and unloading structure, and the controller 8 is electrically connected to the weighing sensor 2. The controller 8 is connected to the weight 9 loading and unloading structure: the weight 9 loading and unloading structure is generally used to adjust or calibrate the accuracy of the weighing system. By connecting the controller 8 to the weight 9 loading and unloading structure, the addition or removal of the weight 9 can be automatically or remotely controlled, so as to calibrate or adjust the weighing system. This connection method can improve the accuracy and convenience of the weighing system and save time and labor costs. The connection between the controller 8 and the weighing sensor 2 is to realize data transmission and signal processing. The weighing sensor 2 is responsible for measuring the weight or gravity of the object and transmitting the data to the controller 8 for processing and analysis. Through the connection, the controller 8 can receive the data sent by the sensor and calculate, display or control the relevant equipment according to the set algorithm. This connection method enables the weighing system to monitor and control the weight of the object in real time, and realize automatic weighing operation and data recording.
[0046] See also Figure 3The automatic calibration device 100 for the hopper 3 scale also includes a lifting device, which includes a lifting rod 4 and a weight 9. The lifting rod 4 and the weight 9 are matched in a V shape, so that the controller 8 controls the lifting rod 4 to rise. The V-shaped surface on the lifting rod 4 contacts the V-shaped surface on the weight 9. The lifting rod 4 lifts the weight 9 until the weight 9 is lifted to a specified height h, and the weight 9 is placed on the specified workstation. Through the simple design of the V-shaped surface, the weight 9 can be stably transported to the specified workstation.
[0047] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. An automatic hopper scale calibration device, characterized in that: include: Support body; A weighing sensor is fixedly arranged on the support body; A hopper, aligned with the weighing sensor and mounted on the support body; as well as, The weight loading and unloading structure includes a lifting rod which can move in the up and down directions. When the lifting rod moves upward, the weight moves upward along with the lifting rod. When the lifting rod moves downward, the weight can drop downward to a designated workstation.
2. The automatic hopper scale calibration device according to claim 1, characterized in that: The automatic hopper scale calibration device further comprises a vibration reduction device, and the vibration reduction device is arranged between the support body and the weighing sensor.
3. The automatic hopper scale calibration device according to claim 1, characterized in that: The hopper and the weighing sensor are fixedly connected via a mounting platform.
4. The automatic hopper scale calibration device according to claim 3, characterized in that: A pressure head is arranged between the mounting platform and the weighing sensor.
5. The automatic hopper scale calibration device according to claim 1, characterized in that: The number of the weighing sensors is greater than or equal to 3, the weighing sensors are evenly distributed on the outer peripheral side of the hopper, a plurality of the weighing sensors are connected in parallel, and the weighing sensors are connected in parallel in a junction box via cables.
6. The automatic hopper scale calibration device according to claim 1, characterized in that: The automatic hopper scale calibration device further comprises a weighing meter, which is connected to the weighing sensor and is used to receive a signal from the weighing sensor.
7. The automatic hopper scale calibration device according to claim 6, characterized in that: The automatic hopper scale calibration device further comprises a host computer, and the host computer is electrically connected to the weighing instrument.
8. The automatic hopper scale calibration device according to claim 1, characterized in that: The automatic calibration device for hopper scales also includes a controller, which is electrically connected to the weight loading and unloading structure, and the controller is electrically connected to the weighing sensor.
9. The automatic hopper scale calibration device according to claim 8, characterized in that: The automatic calibration device for the hopper scale also includes a lifting device, which includes a lifting rod and a weight. The lifting rod and the weight are matched in a V shape, and the controller controls the lifting rod to rise. The V-shaped surface on the lifting rod contacts the V-shaped surface on the weight, and the lifting rod lifts the weight until the weight is lifted to a specified height h, and the weight is placed on the specified workstation.