Mobile hopper feed control system

Abstract

The application discloses a mobile hopper feeding control system, which comprises a PLC control unit, a feeding unit and a detection unit; the detection unit comprises a plurality of weighing sensors installed at the lower part of the hopper, a displacement sensor built in the electro-hydraulic push rod of the hopper door installed at the discharge port and a laser range finder installed on the frame of the mobile hopper, and is used for realizing real-time detection of the weight of the material carried in the hopper, the opening value of the hopper door and the loading condition of the transfer truck. The application realizes accurate control of the storage of the material in the hopper, the quantitative feeding process and the cleaning function before the material in the hopper is replaced. Through flexible and mobile control and accurate unloading control, the mobile hopper improves the overall operation efficiency of the bulk cargo terminal.

Description

Technical Field

[0001] This invention belongs to the field of mobile hopper technology, and particularly relates to a mobile hopper feeding control system. Background Technology

[0002] Mobile hoppers are mobile devices used for temporary storage, transfer, and quantitative feeding of materials, widely used in bulk cargo terminals. Their core features are mobility and flexible unloading, allowing them to work with gantry cranes, trucks, and other equipment to achieve efficient material flow. Controlling feeding accuracy, preventing overloading, and addressing the needs for material changeover and cleaning during unloading of different materials are pressing issues. Existing mobile hopper feeding control systems suffer from the following drawbacks: insufficient metering and control accuracy, and errors caused by material falling from above: even after the feeder stops, material may continue to fall from the pipes or outlet due to gravity. This falling material causes the final actual batch weight to exceed the set target, creating a fixed system error. Due to the lack of high-precision dynamic compensation algorithms, traditional fixed-value compensation cannot adapt to changes in material characteristics or level, making it difficult to improve batching accuracy. Material falling from a height exerts a continuously changing impact force on the weighing hopper or conveyor belt below, causing impact errors. Meanwhile, existing belt scales exhibit significant signal lag when reporting flow rate, and motor current cannot detect local overloads, resulting in the control system being unable to accurately and in real time grasp the actual material flow rate.

[0003] Furthermore, the system typically relies solely on limit switches or simple switching signals to determine the material level. These hardware components are prone to malfunction in harsh environments with high humidity and dust levels, leading to misjudgments or even safety accidents such as roof falls. In addition, in scenarios where multiple points simultaneously feed material onto a single conveyor belt, the system lacks coordinated control, which can easily cause localized accumulation or spillage of material on the belt. Summary of the Invention

[0004] Based on the aforementioned issues with the mobile hopper feeding control system, such as weighing errors caused by airborne material and material impact, and the lack of an effective dynamic compensation algorithm, which makes it difficult to improve the batching accuracy, the technical means adopted in this invention are as follows: A mobile hopper feeding control system, including a PLC control unit, a feeding unit, and a detection unit.

[0005] The detection unit includes multiple weighing sensors installed at the bottom of the hopper, a displacement sensor built into the electro-hydraulic actuator of the hopper gate at the discharge port, and a laser rangefinder installed on the mobile hopper frame, used to realize real-time detection of the weight of the material carried in the hopper, the opening value of the hopper gate, and the loading status of the transfer truck.

[0006] The PLC control unit is used to control the material unloading, storage, and quantitative feeding process. It includes a PLC module, a switch, a DO module, and an AI module installed in the control box at the trolley structure. The PLC module receives detection data from the weighing sensor in the detection unit and the displacement sensor of the electro-hydraulic push rod of the hopper gate through the AI ​​module to obtain the real-time weight value of the material carried in the hopper and the real-time opening value of the hopper gate. The PLC module receives data from the laser rangefinder in the detection unit transmitted by the switch to determine whether the material loading on the truck has reached the overflow risk. The PLC module controls the hopper gate opening and closing contactor in the feeding unit through the DO module, thereby driving the extension and retraction of the electro-hydraulic push rod of the hopper gate to realize the opening, closing, and opening degree control of the hopper gate. At the same time, the PLC module sends drive commands to the feeder frequency converter through the switch to control the feeder's feeding start, stop, and speed adjustment in real time.

[0007] The feeding unit includes a feeder frequency converter and a hopper gate opening / closing contactor installed in the control box at the trolley structure, as well as an electro-hydraulic push rod for the hopper gate and a feeder installed at the discharge port. The feeder frequency converter is used to receive control commands from the PLC control unit to drive the feeder to start, stop, and adjust its speed. The hopper gate opening / closing contactor is used to receive control commands from the PLC control unit to drive the electro-hydraulic push rod for the hopper gate to extend or retract, so as to realize the opening, closing, and opening degree control of the hopper gate at the discharge port at the bottom of the hopper.

[0008] Furthermore, the weighing sensor is a pressure-type weighing sensor, installed at the four corners of the hopper. The detected pressure value is transmitted to the PLC control unit in the form of a 4-20mA signal. After calibration and conversion using counterweights, the real-time weight of the entire hopper is obtained, and thus the real-time weight of the material carried in the hopper is derived. The specific calculation method is as follows:

[0009] W hopper = a (X11+X12+X13+X14)+b; W code = a (X21+X22+X23+X24)+b; Where W_hopper is the weight of the mobile hopper itself, W_weight is the total weight of the mobile hopper and the counterweight, a is the weight conversion factor, X11, X12, X13, and X14 are the values ​​detected by the weighing sensor when the mobile hopper is unloaded, X21, X22, X23, and X24 are the values ​​detected by the weighing sensor when the counterweight is placed in the mobile hopper, and b is the weight conversion correction factor. By solving the above system of equations, the values ​​of the weight conversion factor a and the weight conversion correction factor b are obtained; Using the calculated values ​​of a and b, the real-time weight of the material carried in the hopper is detected: Material W = a (X1 + X2 + X3 + X4) + b; Where X1, X2, X3, and X4 are the real-time detection values of the load cells.

[0010] Furthermore, the displacement sensor内置 in the electro-hydraulic push rod of the hopper door采用 the form of a rope-pull sensor, outputs a 4-20mA signal and transmits it to the PLC control unit. The opening value of the hopper door is obtained through conversion. The specific conversion method is as follows: 100% = c Y_open + d; 0% = c Y_close + d; Where Y_open is the detection value of the displacement sensor when the hopper door is fully open, Y_close is the detection value of the displacement sensor when the hopper door is fully closed, c is the conversion coefficient of the hopper door opening, and d is the conversion correction coefficient of the hopper door opening; By solving the above equations, the values of the conversion coefficient c of the hopper door opening and the conversion correction coefficient d of the hopper door opening are obtained.

[0011] Then, using the calculated values of c and d, the opening value of the hopper door is detected: L_opening = c Y + d; Where Y is the real-time detection value of the displacement sensor.

[0012] Furthermore, the detection direction of the laser rangefinder is towards the hopper of the transfer truck, and the loading height of the material in the hopper is detected in real time. The detection data is transmitted to the PLC control unit in the form of the Profinet communication protocol, which is used to judge whether the material in the transfer truck hopper is full to avoid overflow. The judgment method is as follows: When S_target < H_truck + H_material_safe, there is no risk of material overflow, and feeding can continue until the allowable value of the carrying weight of the transfer truck; When S_target ≥ H_truck + H_material_safe, it is judged that the material loading in the truck has reached the critical height of the overflow risk. Even if the feeding amount has not reached the allowable value of the carrying weight of the transfer truck, the feeding operation needs to be terminated.

[0013] Where S_target is the distance value of the target detected by the laser rangefinder, H_truck is the bottom height value of the transfer truck hopper, and H_material_safe is the allowable height value of the material accumulation.

[0014] Furthermore, the PLC module receives detection data from the laser rangefinder in the detection unit via the Profinet protocol through the switch, and simultaneously receives detection data from the weighing sensor and displacement sensor via the AI ​​module in a hard-wired manner. The PLC module controls the hopper gate opening and closing contactor via the DO module in a hard-wired manner, thereby driving the electro-hydraulic actuator to realize the opening and closing of the hopper gate and the adjustment of the opening degree. The PLC module transmits the drive commands to the feeder frequency converter via the switch using the Profinet protocol to realize the start, stop and speed regulation of the feeder.

[0015] Furthermore, after receiving the drive command from the PLC control unit, the feeder frequency converter drives the feeder in a hard-wired manner to perform start-up, stop, and speed adjustment operation control; the hopper gate opening and closing contactor receives the control command from the PLC control unit to perform the engagement and release actions, and drives the hopper gate electro-hydraulic rod to extend and retract in a hard-wired manner, thereby realizing the opening, closing, and adjustment of the hopper gate opening and closing.

[0016] Furthermore, the load cell transmits the detected 4-20mA signal to the AI ​​module in the PLC control unit via hardwiring; the displacement sensor transmits the detected 4-20mA signal to the AI ​​module in the PLC control unit via hardwiring; and the laser rangefinder transmits the detected data to the PLC control unit via the Profinet protocol.

[0017] Compared with the prior art, the present invention has the following advantages: This invention discloses a mobile hopper feeding control system, which realizes the receiving and storage of materials in the hopper, precise control during the quantitative feeding process, and material changing and cleaning functions before material change in the hopper. The mobile hopper improves the overall operational efficiency of bulk cargo terminals through flexible and precise unloading control.

[0018] This invention utilizes a PLC module with Profinet protocol and hardwiring to receive real-time detection data from a laser rangefinder, weighing sensor, and displacement sensor, forming a closed-loop feedback control system that integrates multi-source information. Compared to existing open-loop control technologies that rely solely on limit switches or manual experience, this invention can accurately sense the actual opening degree of the hopper gate, the operating status of the feeder, and the instantaneous material flow rate, effectively eliminating metering errors caused by "flying material" and material impact, and significantly improving batching accuracy.

[0019] This invention establishes a linkage logic between the feeder's variable frequency speed regulation and the hopper gate's electro-hydraulic actuator opening adjustment through a PLC-built-in collaborative control module. When the feed rate needs adjustment, the system performs coordinated actions according to an optimized timing sequence: closing the gate before reducing the frequency for reducing material, and increasing the frequency before opening the gate for adding material. This avoids material accumulation, compaction, blockage at the discharge port, or feeder wear due to asynchronous actions, ensuring the continuity and stability of the feeding process. Based on the above reasons, this invention can be widely applied in various fields. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a layout diagram of the mobile hopper feeding control system in this invention. Figure 2 This is a diagram of the mobile hopper feeding control system architecture in this invention. Figure 3 Wiring diagram of the PLC control unit in this invention. Figure 4 This is the wiring diagram of the feeding unit in this invention. Figure 5 Wiring diagram of the detection unit in this invention Figure 6 This is a control flowchart of the mobile hopper feeding control system in this invention. Detailed Implementation To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] As shown in Figure 1, the present invention provides a mobile hopper feeding control system, including a PLC control unit, a feeding unit and a detection unit.

[0024] The PLC control unit consists of a PLC module, a switch, a DO module, and an AI module, all installed in the control box within the trolley structure. It is used to control material unloading, storage, and quantitative feeding. The PLC module receives data from the weighing sensor in the detection unit and the displacement sensor of the hopper gate's electro-hydraulic actuator via the AI ​​module, thus determining the real-time weight of the material in the hopper and the real-time opening degree of the hopper gate. The PLC module receives data from the laser rangefinder in the detection unit, transmitted via the switch, to assess whether the truck's material loading has reached the overflow risk level. Simultaneously, the PLC module controls the hopper gate opening / closing contactor in the feeding unit via the DO module, driving the extension and retraction of the hopper gate's electro-hydraulic actuator to open, close, and control the opening degree of the hopper gate. The PLC module also sends drive commands to the feeder's frequency converter via the switch, enabling the feeder's start, stop, and speed adjustment functions.

[0025] The feeding unit consists of a feeder frequency converter and a hopper gate opening / closing contactor installed in the control box at the trolley structure, as well as an electro-hydraulic actuator for the hopper gate and the feeder installed at the discharge port. It is used to control the opening and closing of the hopper gate at the discharge port at the bottom of the hopper, and to control the start, stop, and speed adjustment of the feeder. The feeder frequency converter drives the feeder by receiving control commands from the PLC control unit. The hopper gate opening / closing contactor, by receiving control commands from the PLC control unit, drives the electro-hydraulic actuator for the hopper gate to extend and retract, thus opening and closing the hopper gate and controlling its opening degree.

[0026] The detection unit consists of four weighing sensors installed at the bottom of the hopper, a displacement sensor built into the electro-hydraulic actuator of the hopper gate at the discharge port, and a laser rangefinder installed on the mobile hopper frame. It is used to realize the real-time detection functions of the weight of the material carried in the hopper, the opening value of the hopper gate, and the loading status of the transfer truck.

[0027] The weighing sensors are pressure-type load cells, installed at the four corners of the hopper. The detected pressure values ​​are transmitted to the PLC control unit as 4-20mA signals. After calibration and conversion using counterweights, the real-time weight of the entire hopper can be obtained, and thus the real-time weight of the material carried in the hopper can be calculated. The specific calculation method is as follows: W hopper = a (X11+X12+X13+X14)+b; W code = a (X21+X22+X23+X24)+b; Where W_hopper is the weight of the mobile hopper itself, W_weight is the total weight of the mobile hopper and the counterweight, a is the weight conversion factor, X11, X12, X13, and X14 are the detection values ​​of weighing sensors 1-4 when the mobile hopper is unloaded, X21, X22, X23, and X24 are the detection values ​​of weighing sensors 1-4 when the mobile hopper is loaded with counterweights, and b is the weight conversion correction factor. By solving the above system of equations, the values ​​of the weight conversion factor a and the weight conversion correction factor b are obtained.

[0028] Then, using the calculated values ​​of a and b, the real-time weight of the material carried in the hopper is detected: W_material = a (X1+X2+X3+X4)+b; X1, X2, X3, and X4 are the real-time detection values ​​of weighing sensors 1-4.

[0029] The displacement sensor built into the electro-hydraulic actuator of the hopper gate is a pull-rope type sensor, which outputs a 4-20mA signal to the PLC control unit. The opening value of the hopper gate is then calculated. The specific calculation method is as follows: 100% = c Y opens +d; 0%=c Y closes +d; Where Y_open is the displacement sensor value when the hopper gate is fully open, Y_close is the displacement sensor value when the hopper gate is fully closed, c is the hopper gate opening conversion coefficient, and d is the hopper gate opening conversion correction coefficient. By solving the above set of equations, the values ​​of the hopper gate opening conversion coefficient c and the hopper gate opening conversion correction coefficient d are obtained.

[0030] Then, the calculated values of c and d are used to detect the opening value of the hopper door: L opening = c Y + d; where Y is the real-time detection value of the displacement sensor.

[0031] The detection direction of the laser rangefinder is towards the hopper of the transfer truck, and the real-time detection of the material loading height in the hopper is carried out. The detection data is transmitted to the PLC control unit in the form of Profinet communication protocol, which is used to judge whether the material in the transfer truck hopper is full to avoid overflow protection. The judgment method is as follows: When S target < H card + H material safety, there is no risk of material overflow, and feeding can continue until the allowable value of the carrying weight of the transfer truck; When S target ≥ H card + H material safety, it is judged that the material loading in the truck has reached the critical height of overflow risk. Even if the feeding amount has not reached the allowable value of the carrying weight of the transfer truck, the feeding operation needs to be terminated.

[0032] Where S target is the distance value of the target detected by the laser rangefinder, H card is the bottom height value of the transfer truck hopper, and H material safety is the allowable height value of material accumulation.

[0033] Embodiment The mobile hopper feeding control system is as Figure 2 shown, and it consists of three parts: the PLC control unit U1, the feeding unit U2, and the detection unit U3.

[0034] The PLC control unit U1 consists of a PLC module, a switch, a DO module, and an AI module. As Figure 3 shown, the PLC module receives the detection data of the laser rangefinder in the detection unit U3 via the switch with the Profinet protocol, and receives the detection data of the weighing sensor and the displacement sensor in the detection unit U3 in the form of hard wiring through the AI module. Using the above detection data, the PLC module controls the suction and release of the hopper door opening and closing contactor in the feeding unit U2 in the form of hard wiring through the DO module, and then drives the electro-hydraulic push rod of the hopper door to extend and retract, realizing the opening, closing, and regulating the opening control of the hopper door. In addition, the PLC module transmits the drive control instruction to the feeder frequency converter in the feeding unit U2 via the switch with the Profinet protocol, and then drives the feeder to start, stop, and speed up.

[0035] The feeding unit U2 consists of a feeder frequency converter, a hopper door opening and closing contactor, an electro-hydraulic push rod of the hopper door, and a feeder. As Figure 4As shown, after receiving the drive command from the PLC control unit U1, the feeder frequency converter drives the feeder to start, stop, and speed regulation via hard-wiring. The hopper gate opening and closing contactor is controlled by the PLC control unit U1 to engage and disengage, driving the hopper gate electro-hydraulic rod to extend and retract via hard-wiring, thereby realizing the opening, closing, and opening degree adjustment control of the hopper gate.

[0036] The detection unit U3 consists of a weighing sensor, a displacement sensor, and a laser rangefinder. For example... Figure 5 As shown, four load cells transmit their detected 4-20mA signals to the AI ​​module in PLC control unit U1 via hardwiring. The displacement sensor also transmits its detected 4-20mA signals to the AI ​​module in PLC control unit U1 via hardwiring. The laser rangefinder transmits its detected data to PLC control unit U1 via the Profinet protocol.

[0037] This technology provides a mobile hopper feeding control system that enables the receiving and storage of materials in the hopper, precise control during quantitative feeding, and cleaning and replacement of materials before hopper material change. Through flexible and precise unloading control, the mobile hopper improves the overall operational efficiency of bulk cargo terminals.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mobile hopper feeding control system, characterized in that... include: PLC control unit, feeding unit, and detection unit; The detection unit includes multiple weighing sensors installed at the bottom of the hopper, a displacement sensor built into the electro-hydraulic push rod of the hopper gate installed at the discharge port, and a laser rangefinder installed on the mobile hopper frame, which are used to realize real-time detection of the weight of the material carried in the hopper, the opening value of the hopper gate, and the loading status of the transfer truck. The PLC control unit is used to control the material unloading, storage, and quantitative feeding process. It includes a PLC module, a switch, a DO module, and an AI module installed in the control box at the trolley structure. The PLC module receives the detection data from the weighing sensor in the detection unit and the detection data from the electro-hydraulic push rod displacement sensor of the hopper gate through the AI ​​module to obtain the real-time weight value of the material carried in the hopper and the real-time opening value of the hopper gate. The PLC module receives data from the laser rangefinder in the detection unit transmitted via the switch to determine whether the truck's material loading has reached the overflow risk level. The PLC module controls the hopper gate opening and closing contactor in the feeding unit through the DO module, thereby driving the extension and retraction of the hopper gate's electro-hydraulic push rod, thus realizing the opening, closing, and opening degree control of the hopper gate. At the same time, the PLC module sends drive commands to the feeder frequency converter through the switch, thereby performing real-time control of the feeder's feeding start, stop, and speed adjustment. The feeding unit includes a feeder frequency converter and a hopper gate opening / closing contactor installed in the control box at the trolley structure, as well as an electro-hydraulic push rod for the hopper gate and a feeder installed at the discharge port. The feeder frequency converter is used to receive control commands from the PLC control unit to drive the feeder to start, stop, and adjust its speed. The hopper gate opening / closing contactor is used to receive control commands from the PLC control unit to drive the electro-hydraulic push rod for the hopper gate to extend or retract, so as to realize the opening, closing, and opening degree control of the hopper gate at the discharge port at the bottom of the hopper.

2. The mobile hopper feeding control system according to claim 1, characterized in that: The weighing sensors are pressure-type weighing sensors, installed at the four corners of the hopper. The detected pressure values ​​are transmitted to the PLC control unit in the form of 4-20mA signals. After calibration and conversion using counterweights, the real-time weight of the entire hopper is obtained, and thus the real-time weight of the material carried in the hopper is derived. The specific calculation method is as follows: W hopper = a (X11+X12+X13+X14)+b; W code = a (X21+X22+X23+X24)+b; Where W_hopper is the weight of the mobile hopper itself, W_weight is the total weight of the mobile hopper and the counterweight, a is the weight conversion factor, X11, X12, X13, and X14 are the values ​​detected by the weighing sensor when the mobile hopper is unloaded, X21, X22, X23, and X24 are the values ​​detected by the weighing sensor when the counterweight is placed in the mobile hopper, and b is the weight conversion correction factor. By solving the above system of equations, the values ​​of the weight conversion factor a and the weight conversion correction factor b are obtained; Using the calculated values ​​of a and b, the real-time weight of the material carried in the hopper is detected: W_material = a (X1+X2+X3+X4)+b; X1, X2, X3, and X4 are the real-time detection values ​​of the weighing sensors.

3. The mobile hopper feeding control system according to claim 1, characterized in that: The displacement sensor built in the electro-hydraulic push rod of the hopper door adopts the form of a wire-pulling sensor, outputs a 4-20 mA signal and transmits it to the PLC control unit. The opening value of the hopper door is obtained through conversion. The specific conversion method is as follows: 100% = c Y opens +d; 0%=c Y closes +d; Where Y_open is the detection value of the displacement sensor when the hopper door is fully opened, Y_closed is the detection value of the displacement sensor when the hopper door is fully closed, c is the conversion coefficient of the hopper door opening, and d is the correction coefficient for the conversion of the hopper door opening; By solving the above equations, the values of the conversion coefficient c of the hopper door opening and the correction coefficient d for the conversion of the hopper door opening are obtained. Then, using the calculated values of c and d, the opening value of the hopper door is detected: L opening degree = c Y+d; Where Y is the real-time detection value of the displacement sensor.

4. The mobile hopper feeding control system according to claim 1, characterized in that: The detection direction of the laser rangefinder is towards the hopper of the transfer truck, and the loading height of the material in the hopper is detected in real time. The detection data is transmitted to the PLC control unit in the form of the Profinet communication protocol for judging whether the material in the transfer truck hopper is full to avoid overflow. The judgment method is as follows: When S_target < H_truck + H_material_safe, there is no risk of overflow of the material, and feeding can continue until the allowable value of the carrying weight of the transfer truck; When S_target ≥ H_truck + H_material_safe, it is judged that the material loading in the truck has reached the critical height of the overflow risk. Even if the feeding amount has not reached the allowable value of the carrying weight of the transfer truck, the feeding operation needs to be terminated. Where S_target is the distance value of the target detected by the laser rangefinder, H_truck is the bottom height value of the transfer truck hopper, and H_material_safe is the allowable height value of the material accumulation.

5. A mobile hopper feeding control system according to claim 1, characterized in that: The PLC module receives the detection data of the laser rangefinder in the detection unit through the Profinet protocol via the switch, and at the same time receives the detection data of the weighing sensor and the displacement sensor in a hard-wired manner through the AI module; the PLC module controls the hopper door opening and closing contactor in a hard-wired manner through the DO module, and then drives the electro-hydraulic push rod to realize the opening, closing and opening adjustment of the hopper door. The PLC module transmits the drive command to the feeder frequency converter via the switch in the form of the Profinet protocol to realize the start, stop and speed regulation operation of the feeder.

6. The mobile hopper feeding control system according to claim 1, characterized in that: After receiving the drive command from the PLC control unit, the feeder frequency converter drives the feeder in a hard-wired form to perform the start, stop and speed regulation operation control; the hopper door opening and closing contactor receives the control command from the PLC control unit, controls the suction and release actions, and drives the hopper door electro-hydraulic rod to extend and retract in a hard-wired form, thereby realizing the opening, closing and opening adjustment control of the hopper door.

7. A mobile hopper feeding control system according to claim 1, characterized in that: Among them, the weighing sensor transmits the detected 4-20 mA signal to the AI module in the PLC control unit in a hard-wired form; the displacement sensor transmits the detected 4-20 mA signal to the AI module in the PLC control unit in a hard-wired form, and the laser rangefinder transmits the detected data to the PLC control unit in the form of the Profinet protocol.

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