Bulk cargo loading cargo weighing system and loading cargo weighing method

Abstract

The invention discloses a cargo weighing system for bulk cargo loading. The cargo weighing system comprises a weighing sensor arranged at the bottom of a loading hopper; the hopper controller is in signal connection with the weighing sensor and is used for receiving a signal of the weighing sensor and outputting the weight of goods in the hopper; the weighing device is arranged on the crane; the first communication module is arranged on the loading hopper and connected with the hopper controller; the second communication module is arranged on the crane; the wireless transmission module is in communication connection with the hopper controller; the operation control end is in communication connection with the wireless transmission module and is used for controlling the opening and closing states of a hopper door of the hopper and setting the loading weight; and a loading information display module in communication connection with the operation control end, compared with the prior art, the scheme can realize loading weight measurement and improve the overall loading efficiency under the conditions of not influencing the loading efficiency and increasing the operation energy consumption of the crane, and the invention further provides a loading cargo weighing method which also has the above technical effects.

Description

Technical Field

[0001] The present application relates to the technical field of loading and weighing, and more specifically, to a bulk cargo loading and weighing system and a weighing method. Background Art

[0002] In bulk cargo operations at the terminal, there is a working condition where the crane grabs the cargo from the ship and puts it into the loading hopper, then opens the loading and unloading port under the hopper to load the cargo into the car compartment. During the loading process, if the crane puts cargo into the hopper at the same time, then during this period of time, there will be both cargo entering and cargo being discharged from the hopper, and the weight of the cargo entering the hopper and the cargo discharged from the hopper cannot be accurately measured, so the weight of the loaded cargo cannot be measured. The truck needs to be driven to the dock scale to be weighed. If overloading occurs, part of the cargo will have to be unloaded, affecting the terminal's operating efficiency.

[0003] In the prior art, the methods used include a double-layer hopper to achieve loading weighing and installing a weighing system on the hopper for weighing. However, the existing weighing method has the disadvantages of affecting loading efficiency and increasing energy consumption during crane operation, thereby increasing terminal operating costs.

[0004] Therefore, how to provide a bulk cargo weighing system and weighing method that can overcome the existing technical problems and calculate the weight of the loaded cargo by detecting the weight of the cargo in the hopper before loading, the weight of the cargo in the crane sling, and the real-time weight of the cargo in the hopper during loading is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a bulk cargo loading weighing system, which can overcome the existing technical problems and improve the overall loading efficiency by detecting the weight of the cargo in the hopper before loading, the weight of the cargo in the crane sling and the real-time weight of the cargo in the hopper during loading.

[0006] The technical solution provided by the present invention is as follows:

[0007] The present invention provides a bulk cargo weighing system, comprising: a weighing sensor arranged at the bottom of a loading hopper; a hopper controller connected to the weighing sensor signal, the hopper controller is used to receive the weighing sensor signal and output the weight of the cargo in the hopper; a weighing device arranged on a crane, used to weigh the weight of the cargo in the crane sling; a first communication module arranged on the loading hopper and connected to the hopper controller; a second communication module arranged on the crane, the second communication module is connected to the first communication module and is used to transmit the crane cargo weight data to the first communication module; a wireless transmission module connected to the hopper controller; an operation control terminal connected to the wireless transmission module, the operation control terminal is used to control the opening and closing state of the hopper door and set the loading weight; and a loading information display module connected to the operation control terminal.

[0008] Furthermore, in a preferred embodiment of the present invention, the crane spreader is a grab bucket.

[0009] Furthermore, in a preferred embodiment of the present invention, it further comprises: an opening detection and adjustment module provided at the gate below the vehicle hopper, which is used to adjust the hopper door opening according to the loading weight progress. The opening adjustment has the functions of opening detection and automatic adjustment.

[0010] Furthermore, in a preferred embodiment of the present invention, when the loaded weight M is greater than 80% of the maximum allowable loading weight, the bucket gate is automatically adjusted to an opening of 30%; when the loaded weight M is greater than 90% of the maximum allowable loading weight, the bucket gate is automatically adjusted to an opening of 20%; when the loaded weight M is greater than 95% of the maximum allowable loading weight, the bucket gate opening is automatically adjusted to an opening of 10%, wherein the bucket gate opening can be adjusted according to different materials and is not limited to the above-mentioned opening adjustment rules.

[0011] Furthermore, in a preferred embodiment of the present invention, it also includes: a truck license plate recognition module, which is used to identify the license plate information and write it into the database in the hopper controller, and bind it to the loading weight. When the truck enters the operating area again, the loading weight can be automatically matched without resetting.

[0012] Furthermore, in a preferred embodiment of the present invention, it further comprises: an indicator light module, wherein the indicator light module comprises a green light module for reminding the driver to move forward and a red light module for reminding the driver to stop moving forward.

[0013] Furthermore, in a preferred embodiment of the present invention, it further comprises: a voice alarm module for voice prompting the driver of the car to perform actions.

[0014] Furthermore, in a preferred embodiment of the present invention, it also includes: a workload statistics module for performing workload statistics according to operation time, operation vehicles, etc.

[0015] Furthermore, in a preferred embodiment of the present invention, it also includes: a remote transmission module for transmitting the workload data to the customer control room, and the statistical data can be output, saved and printed.

[0016] In addition, the present invention also provides a method for weighing loaded cargo, which is based on the bulk cargo weighing system as described above and includes the following steps:

[0017] S1 sets the current maximum allowable loading weight of the truck to m;

[0018] S2 uses the hopper controller to record the current weight of the goods in the hopper M2;

[0019] After the crane has finished unloading, the weight of the cargo in the hopper after stabilization is recorded as the initial weight of the hopper material M1;

[0020] S3 opens the discharge port below the hopper to load the vehicle, and the weight in the hopper begins to change. The current weight of the cargo in the hopper is M2, and the loaded weight M = M1-M2;

[0021] S4 If the crane puts the cargo into the loading hopper, when the crane spreader enters the top of the hopper, the crane unloading state is triggered, and the current cargo weight in the crane spreader is recorded as M3 and transmitted to the hopper controller; the hopper controller adds the crane spreader cargo weight M3 to the initial weight M1, and obtains the initial weight of this loading M11=M1+M3; then the current loaded weight M=M11-M2;

[0022] If the crane puts the cargo into the hopper multiple times during the current loading process, the calculations in steps S3 and S4 are repeated;

[0023] S5 When M=m, the hopper controller automatically controls the gate below the hopper to close, ending loading. The controller records information such as the loading time and loading weight.

[0024] Compared with the prior art, the bulk cargo loading weighing system of the present invention comprises: a loading hopper; a weighing sensor arranged at the bottom of the loading hopper; the weighing sensor is used to sense the total weight of the hopper and the cargo in the hopper; a hopper controller connected to the weighing sensor signal; the hopper controller is used to calculate the weight of the cargo in the hopper; a first communication module arranged on the loading hopper and connected to the hopper controller; the communication module is used to receive the weight signal and control signal transmitted by the crane and transmit them to the hopper controller; a weighing device arranged on the crane is used to weigh the cargo in the crane sling; a second communication module arranged on the crane is used to transmit the crane cargo weight data to the first communication module; and a communication module connected to the first communication module and the second communication module is used to transmit the crane cargo weight data to the first communication module. The second communication module is connected to the main control center; the operation control terminal is connected to the main control center, and the operation control terminal is used to control the opening and closing status of the hopper door and set the loading weight; the loading information display module is connected to the operation control terminal, and is used to display the set loading weight and loaded weight information. Compared with the prior art, this solution can overcome the problems of the prior art. Without affecting the loading efficiency and increasing the energy consumption of the crane operation, the weight of the loaded goods is calculated by detecting the weight of the goods in the hopper before loading, the weight of the goods in the crane sling, and the real-time weight of the goods in the hopper during loading, thereby improving the overall loading efficiency. In addition, the present invention also provides a method for weighing loaded goods, which also has the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a bulk cargo loading weighing system provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the bulk cargo weighing system provided by an embodiment of the present invention;

[0028] Figure 3 The present invention provides a flow chart of a method for weighing cargo loaded on a vehicle. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0030] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0034] Reference Figures 1 to 3 As shown, the technical solution involved in the embodiment of the present invention includes: a weighing sensor 1 arranged at the bottom of the loading hopper 4;

[0035] A hopper controller 2 connected to the signal of the weighing sensor 1, the hopper controller 2 is used to receive the signal of the weighing sensor 1 and output the weight of the goods in the hopper;

[0036] A weighing device installed on the crane, used to weigh the weight of the cargo in the crane's spreader;

[0037] A first communication module provided on the loading hopper 4 and connected to the hopper controller 2;

[0038] a second communication module provided on the crane, the second communication module being connected to the first communication module and being used to transmit the crane cargo weight data to the first communication module;

[0039] A wireless transmission module communicatively connected to the hopper controller 2;

[0040] An operation control terminal 7 connected to the wireless transmission module for controlling the opening and closing state of the hopper door and setting the loading weight;

[0041] A loading information display module 8 is communicatively connected to the operation control terminal 7 .

[0042] Compared with the prior art, the solution involved in the embodiment of the present invention can overcome the problems of the prior art. Without affecting the loading efficiency and increasing the energy consumption of the crane operation, the weight of the loaded cargo is calculated by detecting the weight of the cargo in the hopper before loading, the weight of the cargo in the crane sling, and the real-time weight of the cargo in the hopper during loading, thereby improving the overall loading efficiency. In addition, the present invention also provides a method for weighing loaded cargo, which also has the above-mentioned technical effects.

[0043] Specifically, in a specific embodiment of the present invention, the crane spreader is a grab bucket.

[0044] Specifically, in a specific embodiment of the present invention, it also includes: an opening detection and adjustment module 5 provided at the gate below the vehicle hopper, which is used to adjust the hopper door opening according to the loading weight progress. The opening adjustment has the functions of opening detection and automatic adjustment.

[0045] Specifically, in a specific embodiment of the present invention, when the loaded weight M is greater than 80% of the maximum allowable loading weight, the bucket gate is automatically adjusted to an opening of 30%; when the loaded weight M is greater than 90% of the maximum allowable loading weight, the bucket gate is automatically adjusted to an opening of 20%; when the loaded weight M is greater than 95% of the maximum allowable loading weight, the bucket gate opening is automatically adjusted to an opening of 10%.

[0046] In the embodiment of the present invention, the setting of the opening detection and adjustment module 5 can automatically adjust the opening of the hopper according to the real-time data of the loading weight. This automatic adjustment mechanism effectively avoids the problem of over- or under-loading due to improper manual operation, and improves the accuracy and safety of loading. At the same time, as the loaded weight increases, the hopper opening is gradually reduced, which also helps to control the loading speed and reduce the risk of overflow.

[0047] Specifically, in a specific embodiment of the present invention, it also includes: a truck license plate recognition module, which is used to identify the license plate information and write it into the database in the hopper controller 2, and bind it to the loading weight. When the truck enters the operating area again, the loading weight can be automatically matched without resetting.

[0048] Specifically, in a specific embodiment of the present invention, it also includes: an indicator light module 3, which includes a green light module for reminding the driver to go forward and a red light module for reminding the driver to stop going forward.

[0049] Specifically, in a specific embodiment of the present invention, it also includes: a voice alarm module 6 for voice prompting the car driver's behavior.

[0050] Among them, the settings of the indicator light module and the voice alarm module provide the driver with intuitive visual and auditory prompts, which help guide the driver to operate correctly and reduce safety accidents caused by misoperation. The green light prompts the driver to move forward to load, and the red light reminds the driver to stop moving forward, effectively ensuring the safety of the work site.

[0051] Specifically, in a specific embodiment of the present invention, it also includes: a workload statistics module, which is used to perform workload statistics according to operation time, operation vehicles, etc.; and also includes: a remote transmission module, which is used to transmit the workload data to the customer control room, and the statistical data can be output, saved, and printed. The workload statistics module can perform statistics according to dimensions such as operation time and operation vehicles, providing detailed data support for management, which helps to optimize resource allocation and improve operation efficiency. The remote transmission module transmits the workload data to the control room in real time, which is convenient for management personnel to remotely monitor the operation status, discover problems in time and make adjustments. At the same time, compared with the existing technology, the output, saving and printing functions of statistical data also provide convenience for internal statistical analysis and file management of the enterprise.

[0052] In addition, an embodiment of the present invention further provides a method for weighing loaded cargo. The weighing method is based on the bulk cargo weighing system as described above, and comprises the following steps:

[0053] S1 sets the current maximum allowable loading weight of the truck to m;

[0054] S2 uses the hopper controller to record the current weight of the goods in the hopper M2;

[0055] After the crane has finished unloading, the weight of the cargo in the hopper after stabilization is recorded as the initial weight of the hopper material M1;

[0056] S3 opens the discharge port below the hopper to load the vehicle, and the weight in the hopper begins to change. The current weight of the cargo in the hopper is M2, and the loaded weight M = M1-M2;

[0057] S4 If the crane puts the cargo into the loading hopper, when the crane spreader enters the top of the hopper, the crane unloading state is triggered, and the current cargo weight in the crane spreader is recorded as M3 and transmitted to the hopper controller; the hopper controller adds the crane spreader cargo weight M3 to the initial weight M1, and obtains the initial weight of this loading M11=M1+M3; then the current loaded weight M=M11-M2;

[0058] If the crane puts goods into the hopper multiple times during the current loading process, the calculation of steps S3 and S4 is repeated; that is, if the crane unloads goods into the hopper, the unloading weight is M3, M4... The loaded weight M = M1+(M3+M4+...)-M2.

[0059] S5 When M=m, the hopper controller automatically controls the gate below the hopper to close, ending loading. The controller records information such as the loading time and loading weight.

[0060] In an embodiment of the present invention, by using the above-mentioned loading weight calculation method, it is possible to accurately obtain the weight of the loaded goods when there are both goods entering and being discharged from the loading hopper, and there is no need to drive the car to the dock scale for weighing, thus overcoming the problem of affecting the terminal operation efficiency in the prior art.

[0061] To be more specific, one of the working conditions in bulk cargo operations at the terminal is that the crane grabs the cargo from the ship and puts it into the loading hopper, then opens the loading and unloading port under the hopper to load the cargo into the car compartment. During the loading process, if the crane puts cargo into the hopper at the same time, then during this period of time, there will be both cargo entering and cargo being discharged from the hopper, and the weight of the cargo entering the hopper and the cargo being discharged from the hopper cannot be accurately measured, so the weight of the loaded cargo cannot be measured, and the truck needs to be driven to the dock scale to be weighed. If overloading occurs, part of the cargo will have to be unloaded, affecting the terminal's operating efficiency.

[0062] In the prior art, one of the methods used is to use a double-layer hopper to achieve loading and weighing. A weighing hopper is set below the conventional hopper, and the weighing hopper is equipped with a weighing system. The crane first unloads the goods into the upper hopper, and then opens the gate below the upper hopper to unload the goods into the weighing hopper. The weighing hopper weighs the weight of the material, and then opens the unloading gate below the weighing hopper to load the material onto the car. During this process, the gate of the upper hopper is closed, and the real-time weight of the material in the weighing hopper is detected and compared with the initial weight, so that the weight of the loaded material can be measured. This method has high measurement accuracy, and the crane can load the hopper and unload the material to the car at the same time without affecting the operating efficiency of the supporting crane.

[0063] However, this method in the prior art requires increasing the overall height of the hopper due to the addition of a weighing hopper, and the lifting height of the corresponding crane hoisting device must also be increased, and the stroke and time of the crane lifting movement are also increased accordingly, which reduces the operating efficiency of the crane, and also increases the energy consumption of the crane during operation, increasing the operating costs of the terminal.

[0064] Another way is to install a weighing system on the hopper, and the crane can load materials into the hopper and unload materials into the car at different times. That is, when the crane is discharging materials into the hopper, the unloading port below the hopper must be closed, and loading is suspended. After the crane has completed unloading, unloading can be continued. This method can also measure the loaded weight. The disadvantage is that feeding and unloading cannot be carried out at the same time, which affects the loading efficiency. Another way is to set up a belt scale under the hopper and use the belt scale to measure the loaded weight. This method can also measure the loaded weight more accurately. The disadvantage is that the belt scale needs to be long enough to ensure the measurement accuracy, and the overall height of the hopper also needs to be increased, which has the same shortcomings as the first method.

[0065] Based on the above-mentioned deficiencies of the prior art, the technical solution involved in the embodiment of the present invention proposes a technical field related to bulk cargo loading, specifically a loading hopper weighing method, which calculates the weight of the loaded cargo by detecting the weight of the cargo in the hopper before loading, the weight of the cargo in the crane sling, and the real-time weight of the cargo in the hopper during loading.

[0066] In the technical solution involved in the embodiment of the present invention, a weighing sensor is arranged on the loading hopper support, and the weighing sensor converts the total weight of the hopper and the goods in the hopper into an electrical signal, and the weight of the goods in the hopper is calculated by the controller; the hopper is provided with a communication module, and the communication module can receive the weight signal and control signal transmitted by the crane, and transmit them to the hopper controller; a weighing device is arranged on the crane to calculate the weight of the goods in the crane sling, and the crane sling is preferably a grab bucket; a communication module is arranged on the crane, and the crane cargo weight data is sent to the hopper communication module through the communication module.

[0067] In the solution involved in the embodiment of the present invention, the weighing calculation method includes the following steps:

[0068] S1 The operator first sets the current total loading weight m. For example, if the maximum allowable loading weight of the current vehicle is 35t, the loading weight m is set to 35t.

[0069] S2 operator prepares to start loading, and the hopper controller records the current weight of the cargo in the hopper M2. If the crane is unloading into the hopper at this time and the cargo weight is in a changing state, after the crane completes unloading, the stabilized weight will be used as the initial weight of the hopper material M1.

[0070] S3 opens the discharge port below the hopper and starts loading. The weight in the hopper keeps changing. The current weight of the cargo in the hopper is M2, and the loaded weight M = M1-M2.

[0071] S4 During the current loading process, if the crane puts the cargo into the loading hopper, when the crane spreader enters above the hopper, the crane unloading state is triggered, and the crane transmits the current cargo weight M3 in the spreader to the hopper controller.

[0072] The S5 hopper controller adds the crane sling cargo weight M3 to the initial weight M1 to obtain the initial weight of this loading M11=M1+M3, and the current loaded weight M=M11-M2.

[0073] S6 If the crane puts cargo into the hopper multiple times during the current loading process, the arrangement calculations of S3 and S4 are repeated.

[0074] S7 When M=m, the hopper controller automatically controls the gate below the hopper to close, ending loading.

[0075] The S8 controller records the loading time, loading weight and other information.

[0076] In addition, in the technical solution involved in the embodiment of the present invention, the gate below the loading hopper has an opening detection and automatic adjustment function, and can automatically adjust the opening size according to the loading progress. When the loaded weight M>80%, the hopper opening is automatically adjusted to 30%; when the loaded weight M>90%, the hopper opening is automatically adjusted to 20%; when the loaded weight M>95%, the hopper opening is automatically adjusted to 10%. The corresponding relationship between the hopper opening and the loaded weight can be adjusted according to different types of goods.

[0077] The loading hopper involved in the embodiment of the present invention has a loading information display screen, which is located at a position convenient for the hopper operator and the car driver to observe. The display screen can display the set loading weight and the loaded weight. The loading hopper is provided with an operation control end, and the operation control end can operate the hopper door to open and close. Combined with the display screen, the loading weight setting can be realized. In addition, the loading hopper involved in the embodiment of the present invention is provided with an indicator light. The indicator light is in the form of red and green lights, which are used to remind the car driver to move forward and stop. In addition, the loading hopper is also provided with a voice alarm for giving voice reminders to the car driver, and has a truck license plate recognition device. The license plate information is written into the database in the controller and bound to the loading weight. When the truck enters the operating area for operation again, the loading weight can be automatically matched without resetting. At the same time, it also has a workload statistics function, which can perform workload statistics according to operation time, operation vehicle, etc., as well as a remote transmission function, which can transmit the workload data to the customer control room, and the statistical data can be output, saved, and printed.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bulk cargo weighing system, characterized in that: include: A weighing sensor located at the bottom of the loading hopper; A hopper controller connected to the weighing sensor signal, the hopper controller is used to receive the weighing sensor signal and output the weight of the goods in the hopper; A weighing device installed on the crane, used to weigh the weight of the cargo in the crane's spreader; A first communication module disposed on the loading hopper and connected to the hopper controller; a second communication module provided on the crane, the second communication module being connected to the first communication module and being used to transmit the crane cargo weight data to the first communication module; A wireless transmission module communicatively connected to the hopper controller; An operation control terminal connected to the wireless transmission module for controlling the opening and closing state of the hopper door and setting the loading weight; A loading information display module is communicatively connected to the operation control terminal.

2. The bulk cargo weighing system according to claim 1, characterized in that: An opening detection and adjustment module is provided at the gate below the loading hopper, and the opening detection and adjustment module is used to adjust the hopper gate opening according to the loading weight progress.

3. The bulk cargo weighing system according to claim 2, characterized in that: When the loaded weight M is greater than 80% of the maximum allowable loading weight, the bucket door automatically adjusts to an opening of 30%; when the loaded weight M is greater than 90% of the maximum allowable loading weight, the bucket door automatically adjusts to an opening of 20%; When the loaded weight M is greater than 95% of the maximum allowable loading weight, the bucket door opening is automatically adjusted to 10%.

4. The bulk cargo weighing system according to claim 3, characterized in that: Also includes: The position detection module is communicatively connected to the hopper controller and the wireless transmission module, and is used to detect whether the crane spreader has reached the unloading position.

5. The bulk cargo weighing system according to any one of claims 1 to 4, characterized in that: Also includes: The truck license plate recognition module is communicatively connected to the hopper controller and the wireless transmission module, and is used to recognize the license plate information and write it into a database in the hopper controller and associate it with the loading weight.

6. The bulk cargo weighing system according to claim 5, characterized in that: Also includes: The indicator light module includes a green light module for reminding the driver to go forward and a red light module for reminding the driver to stop going forward.

7. The bulk cargo weighing system according to claim 6, characterized in that: Also includes: A voice alarm module used to voice prompt the car driver's behavior.

8. The bulk cargo weighing system according to claim 7, characterized in that: Also includes: The workload statistics module is used to perform workload statistics based on operation time, operation vehicles, etc.

9. The bulk cargo weighing system according to claim 8, characterized in that: Also includes: The remote transmission module is used to transmit the workload data to the customer control room. The remote transmission module includes: a data statistics and output module, a data storage module, and a data printing module.

10. A method for weighing cargo loaded on a vehicle, characterized in that: The weighing method is based on the bulk cargo weighing system according to any one of claims 1 to 9, comprising the steps of: S1 sets the current maximum allowable loading weight of the truck to m; S2 loading preparation stage: use the hopper controller to record the current weight of the cargo in the loading hopper as M2; If the crane unloads the cargo into the loading hopper, after the unloading is completed, the weight of the cargo in the hopper after stabilization is recorded as the initial weight of the hopper material M1; S3 loading stage: open the discharge port below the hopper to load the vehicle. The current weight of the cargo in the hopper is M2, and the loaded weight M = M1-M2; S4 If the crane puts the cargo into the loading hopper, the current cargo weight in the crane spreader is recorded as M3 and transmitted to the hopper controller; the hopper controller adds the crane spreader cargo weight M3 to the initial weight M1, and obtains the initial weight of this loading M11=M1+M3; then the current loaded weight M=M11-M2; If the crane puts the cargo into the hopper multiple times during the current loading process, steps S3 and S4 are repeated; S5 When M=m, the hopper controller automatically controls the gate below the hopper to close, ending loading. The controller records information such as the loading time and loading weight.

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