Automatic discharging control system of evapo-separated machine

Abstract

The invention relates to the technical field of grain and oil processing, in particular to an automatic discharging control system of an evapo-separated machine, which comprises a sensing module, a control module and an execution module, and the sensing module is responsible for data acquisition, comprises a plurality of sensors and is used for real-time acquisition of material level height, discharging rate and motor current data in the evapo-separated machine. Key parameter information such as the material level, the flow and the current in each layer of stock bin is collected in a multi-dimensional mode through the sensing module, and comprehensive and real-time data support is provided for control decision making; the material level deviation between a preset target material level and a real-time material level is accurately calculated through a control module so as to reflect the state of materials stored in each bin, and a corresponding adjusting instruction is output according to a calculation result; the execution module efficiently responds to the adjusting instruction to adjust the discharging amount or remove blockage, the blockage problem of the discharging opening can be solved in time, the downtime caused by manual cleaning is shortened, continuous operation of a production line is guaranteed, and losses caused by production interruption are reduced.

Description

Technical Field

[0001] This application relates to the field of grain and oil processing technology, and in particular to an automatic feeding control system for a steam desalination machine. Background Technology

[0002] Steam desolventizers are key equipment in grain and oil processing for desolventizing and passivating anti-nutritional factors from wet soybean meal. Their performance directly impacts product quality and production efficiency. For example, in oil extraction plants for soybeans and other oilseed crops, the wet meal exiting the extractor typically has a solubility of 25%–35%. The role of the steam desolventizer in this case is to remove the solvent from the wet meal, regulate its moisture content, and simultaneously destroy toxic substances (such as urease and trypsin inhibitors), thereby improving the practical value of the soybean meal. Traditional steam desolventizers often have the following problems in the feeding process:

[0003] Uneven feeding: The flow rate of wet meal material is affected by the previous process, which can easily lead to large fluctuations in the feeding amount and make it difficult to maintain a stable material layer height;

[0004] Material level control is difficult: Traditional material feeding processes mostly rely on manual observation and adjustment, which is slow to respond and can easily lead to material levels that are too high or too low.

[0005] The feed inlet is prone to clogging: Due to the high viscosity of wet meal material, it is easy for it to get stuck and accumulate at the feed inlet, requiring frequent manual cleaning;

[0006] Furthermore, the feeding process of traditional steam desalination machines relies too heavily on manual labor, and feeding control mainly depends on the operator's experience and judgment, which leads to human error, resulting in low control accuracy, difficulty in adapting to changes in material characteristics, and poor product quality stability.

[0007] Therefore, there is an urgent need for a highly automated and intelligent feeding control system to improve the operating efficiency and product quality of the steam desalination machine. Summary of the Invention

[0008] This application provides an automatic feeding control system for a steam desalination machine, which solves one or more of the above-mentioned technical problems in the feeding process of traditional steam desalination machines in the prior art.

[0009] This application provides an automatic feeding control system for a desiccant, including:

[0010] The sensing module includes multiple sensors for real-time acquisition of data on material level, feeding rate, and motor current within the desiccant.

[0011] The control module is connected to the sensing module and has a preset target material level. It can compare the collected material level height with the preset target material level, calculate the deviation value, and output adjustment commands.

[0012] The execution module, connected to the control module, includes a variable frequency motor and an anti-blocking device. It can adjust the running speed of the variable frequency motor according to the adjustment command to adjust the feeding rate or activate the anti-blocking device to perform a clearing operation.

[0013] Preferably, the sensing module includes:

[0014] The material level sensor is installed inside each layer of the silo in the desiccant to detect the material level height in each silo.

[0015] Flow sensors are installed at the output end of the discharge port of each silo to detect the real-time discharge rate of each silo.

[0016] A current sensor, connected to the execution module, is used to monitor the operating current of the variable frequency motor to reflect its load changes.

[0017] Preferably, the level sensor is one or more of radar, rotary paddle, or ultrasonic sensors.

[0018] Preferably, the control module employs any one of PID algorithm, adaptive PID algorithm, or fuzzy control algorithm to dynamically adjust the feeding rate based on the material level deviation between the real-time material level and the preset target material level.

[0019] The material level deviation is the difference between the real-time material level and the preset target material level.

[0020] Preferably, the control module is further provided with a preset deviation value to determine whether to adjust the feeding rate. The process by which the control module dynamically adjusts the feeding rate according to the material level deviation is as follows:

[0021] If the material level deviation is greater than or equal to the preset deviation value, the control module will output a power increase command to increase the speed of the variable frequency motor and thus increase the feeding speed.

[0022] If the material level deviation is less than zero, a power reduction command will be output to reduce the speed of the variable frequency motor and thus reduce the feeding speed.

[0023] If the material level deviation is less than the preset deviation value but greater than zero, no additional instructions will be given, and the current material feeding speed will be maintained.

[0024] Preferably, the control module further includes a multi-layer material level coordinated control function, used to coordinate the feeding rate according to the material level deviation of each layer of silos:

[0025] If the material level deviation of each silo is less than zero, then increase the feed rate of the desiccant.

[0026] If the material level deviation of each silo is greater than the preset deviation value, the feeding rate will be reduced to reduce the motor load.

[0027] Preferably, the anti-blocking device includes a rotating anti-blocking blade and an anti-blocking drive motor. The rotating anti-blocking blade is installed at the discharge port of each hopper, and the anti-blocking drive motor can automatically start when the discharge port is detected to be blocked, driving the rotating anti-blocking blade to perform the anti-blocking operation.

[0028] Preferably, the inner wall of the discharge port is made of a wear-resistant and smooth material, and the discharge port is designed with a 60° inclined angle to reduce material adhesion.

[0029] Preferably, the sensing module can also identify abnormal states, including material blockage and sensor malfunction;

[0030] The process by which the control module identifies the abnormal state is as follows:

[0031] If the flow sensor detects a sudden drop in the feeding rate, or the current sensor detects a sudden increase in the operating current of the variable frequency motor, it is determined that the feeding is blocked, and a blockage clearing operation is triggered.

[0032] If any sensor has no signal output or the signal is abnormal, it is determined to be a sensor malfunction and an alarm is triggered.

[0033] Preferably, the system further includes a human-machine interface and an alarm device, wherein:

[0034] The human-machine interface supports manual modification of preset target material level and control parameters, and displays the material level, feeding rate and motor current of each layer in real time;

[0035] The alarm device is an audible and visual alarm device. When the alarm is triggered, it can emit both sound and light signals to alert staff.

[0036] The beneficial effects of this application are as follows:

[0037] The automatic feeding control system for the steam degasser of this application collects key parameter information such as material level, flow rate, and current in each silo from multiple dimensions through the sensing module, providing comprehensive and real-time data support for control decisions. The control module accurately calculates the material level deviation between the preset target material level and the real-time material level to reflect the status of the material stored in each silo, and outputs corresponding adjustment commands based on the calculation results. The execution module efficiently responds to the adjustment commands to adjust the feeding amount or clear blockages, which can promptly handle the problem of blockage at the feeding port, reduce downtime caused by manual cleaning, ensure continuous operation of the production line, and reduce losses caused by production interruptions. At the same time, the modules work together to form a complete closed-loop control, realizing precise regulation of the entire process. From data acquisition to command execution, it realizes intelligent control and dynamic adjustment of the feeding process, effectively solving the problems of uneven feeding and difficult material level control in traditional feeding methods.

[0038] Furthermore, through the coordinated operation of the sensing and control modules, abnormal states such as material blockage and sensor malfunction can be identified in a timely manner, and alarm devices can provide timely warnings to prompt staff to carry out maintenance or trigger emergency procedures, so as to prevent the abnormal situation from escalating and causing serious impact on production. At the same time, the human-machine interface not only facilitates staff to set parameters and monitor status, but also supports manual operation. In case of special circumstances, the system can be switched to manual mode, further improving the reliability and safety of system operation.

[0039] In particular, the modular design of the system allows it to be adapted to evaporation and desiccant equipment of different specifications and with different numbers of layers. It can be put into use simply by adjusting the sensor installation position and preset parameters according to actual production needs, and has strong versatility. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure of the automatic feeding control system for the steam dehydrator provided in the embodiments of this application;

[0042] Figure 2 This is a logic diagram showing how the control module in this application dynamically adjusts the feeding rate based on the material level deviation. Detailed Implementation

[0043] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following is combined with Figure 1-2 This application describes the automatic feeding control system for the evaporator provided in the embodiments of this application.

[0045] Reference Figure 1 As shown in the embodiment of this application, the automatic feeding control system for the steam dehydrator mainly includes a sensing module, a control module, and an execution module. The sensing module is responsible for data acquisition and includes multiple sensors for real-time acquisition of data on material level height, feeding rate, and motor current in the steam dehydrator.

[0046] The control module is connected to the sensing module and uses a PLC programmable logic controller as its core. It has a preset target material level, which can compare the collected material level height with the preset target material level, calculate the deviation value, and output adjustment commands.

[0047] The preset target material level can be uniformly preset according to the ideal production state in the actual production process, such as 70% of the height of each layer of silos. Alternatively, the preset target material level of each silo can be preset individually according to the actual production state. For example, the first layer silo, which is located at the top and is used to receive the added materials, can have its preset target material level increased to meet the material storage needs of the subsequent layers of silos. Meanwhile, the preset target material level of the subsequent layers of silos can be reduced to avoid excessive material accumulation when blockage occurs.

[0048] The execution module receives and operates the instructions from the control module. It is connected to the control module and includes a variable frequency motor and an anti-blocking device. It can adjust the running speed of the variable frequency motor according to the adjustment instructions to adjust the feeding rate or activate the anti-blocking device to perform a clearing operation. The variable frequency motor is used to drive the screw conveyor or the rotary feeding valve. When it receives the power adjustment instruction from the PLC, its internal frequency converter will adjust the motor speed accordingly, thereby changing the feeding rate and realizing closed-loop control of the material level.

[0049] By integrating sensing, control, and execution modules with a human-machine interface, a complete closed-loop automatic control system is constructed. The sensing module collects key parameter information such as material level, flow rate, and current in each silo from multiple dimensions, providing comprehensive and real-time data support for control decisions. The control module accurately calculates the material level deviation between the preset target material level and the real-time material level to reflect the status of the stored materials in each silo, and outputs corresponding adjustment commands based on the calculation results. The execution module efficiently responds to the adjustment commands to adjust the feeding amount or clear blockages, which can promptly handle the problem of blockage at the feeding port, reduce downtime caused by manual cleaning, ensure continuous operation of the production line, and reduce losses caused by production interruptions. At the same time, the collaboration of each module forms a complete closed-loop control, realizing precise regulation throughout the entire process. From data acquisition to command execution, it realizes intelligent control and dynamic adjustment of the feeding process, effectively solving the problems of uneven feeding and difficult material level control in traditional feeding methods.

[0050] The steam desiccant includes at least a feed inlet for adding materials into the steam desiccant, a multi-layer intermittent material storage bin, and a discharge port at the bottom of each bin for discharging materials. The discharge port is also equipped with a screw conveyor or rotary discharge valve for controllable intermittent discharging. A variable frequency motor drives the screw conveyor or the corresponding rotary discharge valve to transport materials in each bin.

[0051] In some specific embodiments, the sensing module includes:

[0052] The level sensor, which is a radar level gauge, is installed on the side wall or top of each silo of the desiccant to detect the material level in each silo in real time in a non-contact manner. In other embodiments, a rotary paddle level switch or an ultrasonic level gauge can also be installed inside each silo of the desiccant to detect and collect the material level in each silo.

[0053] The flow sensor, which is an impact flow meter, is installed at the output end of the discharge port of each layer of silo to detect the real-time discharge rate of each layer of silo. The real-time discharge rate at the discharge port of each layer of silo is detected and collected. This data can be used to help verify whether the material conveying status is normal. In other embodiments, the flow sensor can also be a mass sensor, which can characterize the conveying status by measuring the rate at which the weight of the material in the silo is lost.

[0054] The current sensor, employing the Hall effect, is installed on the power supply line of the variable frequency motor driving the feeding mechanism. It is used to monitor the motor's operating current in real time, thereby indirectly reflecting changes in the motor's load. By monitoring the operating current at the variable frequency motor through the current sensor, changes in its load can be detected, thus indirectly reflecting its operating status.

[0055] In some specific embodiments, the level sensor is one or more of radar, rotary paddle, or ultrasonic sensors.

[0056] In some specific embodiments, the control module uses any one of PID algorithm, adaptive PID algorithm or fuzzy control algorithm to dynamically adjust the feeding rate according to the material level deviation between the real-time material level and the preset target material level.

[0057] The material level deviation is the difference between the real-time material level and the preset target material level. Specifically, the material level deviation = real-time material level - preset target material level.

[0058] In some specific embodiments, the control module is also equipped with a preset deviation value to determine whether to adjust the feeding rate. The preset deviation value can be pre-selected based on the normal material level fluctuation during the production process. For example, if the normal material level fluctuation range is ±5% of the preset target material level, the difference between the preset target material level increased by 5% and the normal preset target material level can be selected as the preset deviation value. The process by which the control module dynamically adjusts the feeding rate based on the material level deviation is as follows:

[0059] If the material level deviation is greater than or equal to the preset deviation value, the control module will output a power increase command to increase the speed of the variable frequency motor and thus increase the feeding speed.

[0060] If the material level deviation is less than zero, the output power will be reduced to decrease the speed of the variable frequency motor and reduce the feeding speed. That is, when the material level deviation is less than zero, it means that the height of the material stored in the silo can no longer meet the needs of normal subsequent conveying. Continuing to convey at this rate may result in the variable frequency motor being idle, which will affect continuous production and waste power resources. At this time, the execution module will control the variable frequency motor speed to reduce the feeding speed of the material.

[0061] If the material level deviation is less than the preset deviation value but greater than zero, no additional instructions will be given, and the current material feeding speed will be maintained.

[0062] In some specific embodiments, the control module also includes a multi-level material level coordinated control function, used to coordinate the feeding rate according to the material level deviation of each silo:

[0063] If the material level deviation of each silo is less than zero, then increase the feed rate of the desiccant.

[0064] If the material level deviation of each silo is greater than the preset deviation value, the feeding rate will be reduced to reduce the motor load.

[0065] The control module also has a multi-level material level collaborative control function, which dynamically adjusts the feeding rhythm through feedback from sensors at each level to avoid material accumulation or material interruption between layers.

[0066] When the material level deviation at each silo is less than zero, it indicates that the overall material level inside the current desiccant is too low. In this case, the PLC can send a command to the upstream feeding equipment, such as the scraper conveyor, to appropriately increase the total feeding rate, thereby increasing the feeding rate of materials being added into the desiccant.

[0067] When the material level deviation at each hopper is greater than the preset deviation value, it means that the overall material level inside the current steam degasser is too high. The feeding rate into the steam degasser will be reduced to reduce the workload of the variable frequency motor and prevent the steam degasser from being overloaded.

[0068] By precisely controlling the material level inside the steam desiccant, it is ensured that the material is heated evenly and desolventized fully inside the steam desiccant, effectively avoiding insufficient desolventization due to excessively high material level or over-processing of material due to excessively low material level, significantly improving the consistency of finished product quality, meeting the market demand for high-quality grain and oil products, and ensuring stable product quality.

[0069] By dynamically adjusting the feed rate, the steam degasser is always operated under optimal load conditions, avoiding energy waste (such as steam and electricity) caused by abnormal material levels. At the same time, it reduces losses caused by excessive material processing, lowers production costs, and optimizes energy consumption and material utilization.

[0070] In some specific embodiments, the anti-blocking device includes a blockage-clearing drive motor, such as a small geared motor, and a corresponding rotating blockage-clearing blade. The rotating blockage-clearing blade is installed inside the easily blocked feed inlet. When the control module issues a blockage-clearing command, the blockage-clearing drive motor starts, driving the rotating blockage-clearing blade to rotate, mechanically agitating, crushing, and pushing the material that is stuck to the blockage until the feed returns to normal. After the sensing module signal returns to normal, the blockage-clearing device automatically stops.

[0071] The automatic anti-blocking mechanism formed by the cooperation of the control module and the execution module can detect and deal with the problem of material blockage in the feed port in a timely manner, greatly reducing the downtime caused by manual cleaning of blocked materials, ensuring the continuous and stable operation of the entire production line, reducing the economic losses caused by production interruption to the enterprise, and improving production continuity.

[0072] In some specific embodiments, the inner wall of the discharge port is made of a wear-resistant and smooth material, and the discharge port is designed with a 60° inclined angle to reduce material adhesion. Specifically, to further prevent blockage, the inner wall of the discharge port is lined with a wear-resistant and smooth polytetrafluoroethylene (PTFE) sheet, and the discharge pipe is designed with a 60° inclined angle, which greatly reduces the possibility of material adhesion.

[0073] In some specific embodiments, the sensing module can also identify abnormal states, including material blockage and sensor failure.

[0074] The process by which the perception module identifies abnormal states is as follows:

[0075] If the flow sensor detects a sudden drop in the feeding rate, such as a drop of more than 50% within 1 minute, or if the current sensor detects a sudden increase in the operating current of the variable frequency motor, exceeding its rated current, then the feeding is determined to be blocked, and the PLC outputs a clearing command to trigger the clearing operation.

[0076] If any sensor has no signal output or the signal is abnormal, such as the material level signal always being at its maximum value, it is determined that the sensor is faulty and an alarm is triggered.

[0077] The sensing module may also include a temperature sensor to monitor the material temperature at the discharge port. When the temperature at the discharge port rises abnormally due to material accumulation, the anti-blocking device is activated and the discharge rate is adjusted to reduce the workload of the variable frequency motor.

[0078] In some specific embodiments, the system also includes a human-machine interface (HMI) and an alarm device for parameter setting, status display, and abnormal alarm. The HMI allows operators to manually modify key parameters such as preset target material level and control algorithm parameters. It can also display production data such as material level height of each layer of the desiccant, feeding rate, and operating current of the actuator in real time. The alarm device is an audible and visual alarm device that can emit sound and light signals simultaneously when the alarm is triggered to prompt operators to carry out timely maintenance.

[0079] The working principle of the automatic feeding control system for the steam dehydrator provided in this application is as follows:

[0080] After the system starts, the sensing module continuously collects corresponding data and uploads it to the PLC core in the control module. The control module compares the real-time material level with the target material level, and outputs a control signal to the variable frequency motor through PID calculation to adjust the speed of the variable frequency motor, thereby regulating the feeding rate and forming a stable closed-loop control loop to keep the material level dynamically balanced. The sensing module also detects whether there is any blockage during operation. Once blockage characteristics are detected, such as a sudden increase in the operating current of the variable frequency motor or a sudden drop in the flow rate at the flow sensor, the control module will activate the unblocking device to clear the blockage at the feeding port until the fault is eliminated. This greatly reduces manual intervention and ensures the stable, efficient and continuous operation of the desiccant.

[0081] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0084] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An automatic unloading control system for a steaming off machine, characterized by, The application relates to a steam stripping machine with a self-adaptive control system. The self-adaptive control system comprises a perception module, a control module and an execution module. The perception module comprises a plurality of sensors for collecting real-time data of material level height, discharging rate and motor current in the steam stripping machine. The control module is connected with the perception module and pre-set with a preset target material level.

2. The automatic destriper unloading control system of claim 1, wherein, The control module compares the collected material level height with the preset target material level, calculates the deviation value and outputs an adjusting instruction. The execution module is connected with the control module and comprises a variable frequency motor and a blockage prevention device. The execution module adjusts the running speed of the variable frequency motor according to the adjusting instruction to adjust the discharging rate or starts the blockage prevention device to perform a blockage removal operation. The perception module comprises a material level sensor, a flow sensor and a current sensor.

3. The automatic destriper unloading control system of claim 2, wherein, The material level sensor is installed in each layer of the material bin of the steam stripping machine and is used for detecting the material level height in each layer of the material bin.

4. The automatic destriper unloading control system of claim 1, wherein, The flow sensor is installed at the output end of the discharging port of each layer of the material bin and is used for detecting the real-time discharging rate of each layer of the material bin. The current sensor is connected with the execution module and is used for monitoring the working current of the variable frequency motor to reflect the load change.

5. The automatic destriper unloading control system of claim 4, wherein, The material level sensor is one or more of a radar type, a resistance rotation type or an ultrasonic wave sensor. The control module adopts any one of a PID algorithm, a self-adaptive PID algorithm or a fuzzy control algorithm to dynamically adjust the discharging rate according to the material level deviation between the real-time material level and the preset target material level. The material level deviation is the difference between the real-time material level and the preset target material level. The control module is further provided with a preset deviation value for judging whether to adjust the discharging rate.

6. The automatic destriper unloading control system of claim 5, wherein, The control module dynamically adjusts the discharging rate according to the material level deviation as follows: If the material level deviation is greater than or equal to the preset deviation value, the control module outputs a power increasing instruction to increase the rotating speed of the variable frequency motor to increase the discharging speed. If the material level deviation is less than zero, the control module outputs a power decreasing instruction to decrease the rotating speed of the variable frequency motor to decrease the discharging speed.

7. The automatic destriper unloading control system of claim 2, wherein, If the material level deviation is less than the preset deviation value but greater than zero, the control module does not output an additional instruction to maintain the current material discharging speed.

8. The automatic destriper unloading control system of claim 7, wherein, The control module further comprises a multi-layer material level coordinated control function for coordinating the feeding rate according to the material level deviation of each layer of the material bin.

9. The automatic destriper unloading control system of claim 2, wherein, If the material level deviation of each layer of the material bin is less than zero, the feeding rate of the steam stripping machine is increased. If the material level deviation of each layer of the material bin is greater than the preset deviation value, the feeding rate is decreased to reduce the motor load. The blockage prevention device comprises a rotating blockage removal blade and a blockage removal driving motor. The inner wall of the discharging port is made of a wear-resistant smooth material and is designed with a 60-degree inclination angle to reduce material adhesion. The perception module can further identify abnormal states, including discharging blockage and sensor failure. The identification process of the perception module on the abnormal states is as follows: If the flow sensor detects a sudden drop of the discharging rate or the current sensor detects a sudden increase of the working current of the variable frequency motor, the discharging blockage is determined and the blockage removal operation is triggered. If any sensor has no signal output or abnormal signal, the sensor failure is determined and an alarm is triggered.

10. The automatic destriper unloading control system of claim 9, wherein, The system further comprises a man-machine interface and an alarm device, wherein: The man-machine interface supports manual modification of preset target material level and control parameters, and real-time display of material level of each layer, discharging rate and motor current; The alarm device is an audible and visual alarm device, which can simultaneously send out sound signals and light signals to prompt the staff when triggering the alarm.

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