A belt conveyor emergency stop alarm method and system based on the Internet

Abstract

The invention relates to the technical field of belt conveyor emergency stop alarm, and discloses an Internet-based belt conveyor emergency stop alarm method and system, the system comprising a transmission module, a temperature detection module, a test module and a data acquisition module, for real-time monitoring of the belt conveyor state and cargo conditions, the method tests and obtains the horizontal belt conveyor emergency stop at different accelerations, the distance that different cargoes on the horizontal belt conveyor continue to move along the transmission direction, and tests and obtains the maximum emergency stop acceleration of the belt conveyor at which different cargoes on the downward belt conveyor will not continue to move when the downward belt conveyor with different slopes stops at different accelerations, and adjusts the emergency stop acceleration of the belt conveyor, the system can set the emergency stop condition according to the temperature of the belt conveyor motor, and distinguish between large cargoes and small cargoes by a quality threshold, and at a belt conveyor bend or on a downward belt conveyor, if cargo falling is detected, the system will sound an alarm.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveyor emergency stop alarm, and in particular to an Internet-based belt conveyor emergency stop alarm method and system. Background Art

[0002] In modern industrial production and logistics transportation, belt conveyors are one of the indispensable equipment. Their efficient and continuous operation mode plays a vital role in maintaining the smoothness of production and logistics processes. However, belt conveyors may encounter various emergencies during operation, such as motor overheating. These situations often cause the system to stop suddenly. When an emergency stop occurs, due to the inertia of the material, it may slide on the belt for a distance or even fall, especially in areas where the belt conveyor has slopes or turns. This risk is particularly significant. Traditional belt conveyor systems often react slowly and have low accuracy in dealing with the consequences of emergency stops. There is a lack of effective prediction and prevention measures. Once an emergency stop occurs, the material may slide on the belt for a distance or even fall. Emergency stop, without timely and accurate warning and intervention measures, may lead to material loss, increase the economic burden of the enterprise, and even endanger the safety of operators. In addition, the emergency stop processing of belt conveyors mostly relies on manual judgment and operation. This method not only has a long response time, but also has great subjectivity and uncertainty, and cannot meet the high standards of modern industrial production for safety and efficiency. In summary, the existing technology cannot fully solve the problem of cargo slippage and falling when the belt conveyor stops suddenly. There is an urgent need for an Internet-based belt conveyor emergency stop alarm system to improve the response speed and accuracy of emergency stop events and ensure production safety and efficiency. Summary of the invention

[0003] The present invention provides an Internet-based belt conveyor emergency stop alarm method and system, which promotes solving the problems mentioned in the above background technology.

[0004] The present invention provides the following technical solution: a belt conveyor emergency stop alarm method and system based on the Internet, comprising:

[0005] The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations. The acceleration direction is opposite to the conveying direction of the horizontal belt conveyor.

[0006] The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations, and different goods on the downward belt conveyor remain relatively stationary with the belt, and the acceleration direction is opposite to the transmission direction of the downward belt conveyor;

[0007] According to the test data, the maximum acceleration of the horizontal belt conveyor at which the goods will not fall at the turning point of the belt conveyor when the belt conveyor stops suddenly is determined, and recorded as the first acceleration;

[0008] According to the test data, the maximum acceleration of the downward belt conveyor at which the goods remain relatively stationary with the belt when the belt conveyor stops suddenly is determined, and recorded as the second acceleration;

[0009] If the first acceleration is less than the second acceleration, the first acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0010] If the first acceleration is greater than the second acceleration, the second acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0011] If the goods on the belt conveyor fall after the belt conveyor stops suddenly, an alarm will be issued, and the alarm position is the belt conveyor where the fallen goods are located.

[0012] The belt conveyor can be emergency stopped according to the motor temperature, including:

[0013] Set the temperature threshold Q;

[0014] Get the temperatures of all belt conveyor motors and sort them in descending order;

[0015] Select the highest temperature among all belt conveyor motor temperatures and record it as P;

[0016] If P>Q, all belt conveyors will stop urgently;

[0017] If P is less than Q, no action is taken.

[0018] include:

[0019] Set quality thresholds;

[0020] Get the quality of all goods;

[0021] If the quality of the goods is greater than the quality threshold, the goods are recorded as large goods;

[0022] If the quality of the goods is less than the quality threshold, the goods will be recorded as small goods.

[0023] include:

[0024] The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations, specifically including:

[0025] Place large goods on the horizontal belt conveyor;

[0026] Set the running speed of the horizontal belt conveyor, recorded as , in meters per second;

[0027] ;in is the maximum speed of the horizontal belt conveyor;

[0028] Set the emergency stop acceleration of the horizontal belt conveyor, recorded as , unit is meter / ;

[0029] ,in is the maximum emergency stop acceleration of the horizontal belt conveyor;

[0030] Start the horizontal belt conveyor. When the horizontal belt conveyor reaches the running speed After that, the horizontal belt conveyor Acceleration emergency stop;

[0031] The moment when the horizontal belt conveyor stops suddenly is recorded as ;

[0032] Get The position of the large cargo on the horizontal belt conveyor at that moment is recorded as the first horizontal position;

[0033] After the large cargo stops completely, obtain the position of the large cargo on the horizontal belt conveyor and record it as the second horizontal position;

[0034] Get the distance between the first horizontal position and the second horizontal position, recorded as , in meters;

[0035] Test the emergency stop acceleration of different horizontal belt conveyors , obtain the emergency stop acceleration of each horizontal belt conveyor for large cargo The distance between the first horizontal position and the second horizontal position ;

[0036] Test to obtain the emergency stop acceleration of each horizontal belt conveyor for small cargo The distance between the first horizontal position and the second horizontal position ;

[0037] Test to obtain different horizontal belt conveyor running speeds Emergency stop acceleration of each horizontal belt conveyor for unloading large and small goods The distance between the first horizontal position and the second horizontal position .

[0038] include:

[0039] The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations and different goods on the downward belt conveyor remain relatively stationary with the belt, specifically including:

[0040] S1 places the large goods on the downward belt conveyor;

[0041] S2 sets the slope of the downward belt conveyor, recorded as , the unit is degree;

[0042] , The maximum slope of the downward belt conveyor, in degrees;

[0043] set up is 0 degrees;

[0044] S3 sets the running speed of the downward belt conveyor to ;

[0045] ;in is the maximum speed of the horizontal belt conveyor;

[0046] S4 sets the emergency stop acceleration of the downward belt conveyor, recorded as , unit is meter / ;

[0047] ,in The maximum emergency stop acceleration of the downward belt conveyor;

[0048] S5 starts the downward belt conveyor. When the running speed of the downward belt conveyor reaches After that, the belt conveyor goes down to Acceleration emergency stop;

[0049] ;

[0050] If the large cargo does not move on the downward belt conveyor after the downward belt conveyor stops suddenly, the downward belt conveyor's emergency stop acceleration should be increased by 0.1 m / s. ;

[0051] Repeat S5. If the large cargo continues to move on the downward conveyor after the downward conveyor stops suddenly, the acceleration of the downward conveyor at the sudden stop is recorded as , unit is meter / ;

[0052] That is, after the downward belt conveyor with different slopes stops suddenly, the large cargo on the downward belt conveyor will continue to move. The maximum acceleration of the downward belt conveyor at the emergency stop is recorded as , unit is meter / ;

[0053] S5 increases the slope of the downward belt conveyor by 1 degree, and repeats S4-S5;

[0054] Testing different downhill conveyor slopes , get the slope of each downward belt conveyor The corresponding downward belt conveyor with different slopes will continue to move after the large cargo on the downward belt conveyor stops suddenly. ;

[0055] Test to obtain the slope of each downward belt conveyor for small cargo The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the small cargo on the downward belt conveyor will continue to move .

[0056] Test to obtain different downward belt conveyor running speeds The slope of each downward conveyor for large and small cargoes The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the goods on the downward belt conveyor will continue to move .

[0057] include:

[0058] Obtain all the turning points of the belt conveyor, where the turning point refers to a part of a ring formed by two concentric circles;

[0059] The two edges of the belt conveyor at the bend are on the circumference of two concentric circles;

[0060] The radius of the concentric circle with the larger radius is recorded as , the running speed of the edge of the belt conveyor on the concentric circle with a large radius is ;

[0061] The radius of the concentric circle with a smaller radius is , the running speed of the edge of the belt conveyor on the concentric circle with a small radius is ;

[0062] Obtain the center of the concentric circles where the two edges of the belt conveyor are located at the turning point, and record it as the center of the concentric circles;

[0063] Obtain the downward projection of the center of gravity of the cargo in the vertical direction and record it as the center of gravity of the cargo;

[0064] When the belt conveyor stops suddenly;

[0065] Get all the goods above the bend of the belt conveyor;

[0066] For each cargo on the belt conveyor bend,

[0067] Get the center of gravity of the cargo;

[0068] With the center of the concentric circle as the center, draw a circle through the center of gravity of the goods, recorded as the target circle, and the radius of the target circle is the distance from the center of gravity of the goods to the center of the concentric circle, recorded as ;

[0069] Calculate the speed of movement of goods;

[0070] The moving speed of each cargo at the turning point of the belt conveyor is calculated by the following formula:

[0071] ;in It is the moving speed of the goods at the turning point of the belt conveyor;

[0072] Draw a tangent line through the center of gravity of the goods along the conveying direction of the belt conveyor to the target circle, which is recorded as the target tangent line;

[0073] The target tangent intersects with the concentric circle with a larger radius, and the intersection point is recorded as the target point;

[0074] Get the distance between the center of gravity of each cargo and the target point, recorded as ;

[0075] Get the distance between the center of gravity of each cargo and the target point The corresponding movement speed of the goods at the turning point of the belt conveyor The emergency stop acceleration of the horizontal belt conveyor ;

[0076] Set the emergency stop acceleration of all horizontal belt conveyors Arrange them in order from small to large, and select the smallest horizontal belt conveyor emergency stop acceleration , recorded as the first acceleration.

[0077] Get all down belt conveyors;

[0078] Get the slope of all downward conveyors;

[0079] Get the running speed of all downward conveyors;

[0080] Get all the goods on the downward conveyor belt;

[0081] For each cargo on the downward conveyor;

[0082] When the belt conveyor stops suddenly;

[0083] Get the running speed of the downward belt conveyor where the goods are located, recorded as ;

[0084] Get the slope of the downward conveyor where the goods are located ;

[0085] Get the running speed of all goods on the downward belt conveyor at the downward belt conveyor where the goods are located Downward belt conveyor slope The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the goods on the downward belt conveyor will continue to move ;

[0086] After all the downward belt conveyors with different slopes are stopped urgently, the goods on the downward belt conveyors will continue to move. Maximum emergency stop acceleration of the downward belt conveyors Arrange in order from small to large, and select the minimum acceleration of the downward belt conveyor with different slopes, at which the goods on the downward belt conveyor will continue to move after the downward belt conveyor stops suddenly. , recorded as the second acceleration.

[0087] If the first acceleration is less than the second acceleration, the first acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0088] If the first acceleration is greater than the second acceleration, the second acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0089] If the goods fall on the conveyor belt after the belt conveyor stops suddenly;

[0090] Get the conveyor belt where the fallen goods are located;

[0091] Alarm at the conveyor belt where the fallen goods are located.

[0092] include:

[0093] Transmission module,

[0094] The conveying module is composed of a plurality of horizontal belt conveyors and a plurality of downward belt conveyors;

[0095] Horizontal belt conveyors include non-turnable belt conveyors and turnable belt conveyors. All horizontal belt conveyors are placed horizontally with the ground.

[0096] Each belt conveyor motor is equipped with a temperature sensor for obtaining the temperature of the belt conveyor motor;

[0097] Temperature detection module,

[0098] The temperature detection module is used to detect the motor temperature of the belt conveyor and select the emergency stop of the belt conveyor according to the motor temperature of the belt conveyor;

[0099] Test module,

[0100] The test module is used to test and obtain the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations;

[0101] And test to obtain the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly with different accelerations, and different goods on the downward belt conveyor will not continue to move;

[0102] Data acquisition module,

[0103] Used to obtain the mass of the goods, the center of gravity of the goods, the running speed of the belt conveyor and the slope of the belt conveyor.

[0104] The present invention has the following beneficial effects:

[0105] 1. This Internet-based belt conveyor emergency stop alarm method and system monitors the operating status of the belt conveyor in real time, including speed, acceleration and the position of the goods on the belt conveyor. When the belt conveyor stops suddenly, it makes adjustments in advance for situations that may cause the goods to fall. The system can automatically calculate the safest emergency stop acceleration, thereby reducing the risk of goods sliding or falling due to inertia caused by emergency stops, and avoiding any damage to the goods when they suddenly stop from a high-speed moving state. This refined management not only improves the safety of operations, but also reduces the additional costs caused by product damage, and ensures the stability and reliability of the material transmission process.

[0106] 2. This Internet-based belt conveyor emergency stop alarm method and system automatically monitors the motor temperature of the belt conveyor and sets the corresponding temperature threshold, allowing the system to automatically perform an emergency stop when the set value is reached or exceeded, thereby avoiding machine damage or potential safety risks caused by excessive temperature. This automated temperature monitoring not only reduces the risks caused by delayed human judgment, but also reduces the monitoring burden of operators, allowing them to focus more on other production monitoring and management tasks. If the motor working in a high temperature environment fails to stop in time, it may damage the motor and cause the entire production line to stop, resulting in high maintenance costs and production losses. The system effectively reduces the frequency of such events through real-time monitoring and intelligent response, ensuring the smoothness and continuity of the production process, which directly affects the reduction of production costs and the improvement of production efficiency.

[0107] 3. This Internet-based belt conveyor emergency stop alarm method and system distinguishes large goods from small goods by setting quality thresholds, thereby achieving refined management of different types of goods and effectively improving the safety and efficiency of logistics transportation. In actual operation, large goods have a larger mass and higher kinetic energy, so they may continue to slide for a long distance when the belt conveyor stops suddenly, which increases the risk of falling at turns or terminals. This differentiated processing based on the size of the goods not only improves the adaptability and flexibility of the system, but also effectively reduces the risks during transportation, ensuring logistics efficiency and cargo safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0108] Figure 1 It is a schematic diagram of the turning point of the belt conveyor of the present invention. DETAILED DESCRIPTION

[0109] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0110] Example, see Figure 1 , a belt conveyor emergency stop alarm method and system based on the Internet, comprising:

[0111] The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations. The acceleration direction is opposite to the conveying direction of the horizontal belt conveyor.

[0112] The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations, and different goods on the downward belt conveyor remain relatively stationary with the belt, and the acceleration direction is opposite to the transmission direction of the downward belt conveyor;

[0113] According to the test data, the maximum acceleration of the horizontal belt conveyor at which the goods will not fall at the turning point of the belt conveyor when the belt conveyor stops suddenly is determined, and recorded as the first acceleration;

[0114] According to the test data, the maximum acceleration of the downward belt conveyor at which the goods remain relatively stationary with the belt when the belt conveyor stops suddenly is determined, and recorded as the second acceleration;

[0115] If the first acceleration is less than the second acceleration, the first acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0116] If the first acceleration is greater than the second acceleration, the second acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0117] If the goods on the belt conveyor fall after the belt conveyor stops suddenly, an alarm will be issued, and the alarm position is the belt conveyor where the fallen goods are located.

[0118] The belt conveyor can be emergency stopped according to the motor temperature, including:

[0119] Set the temperature threshold Q;

[0120] Get the temperatures of all belt conveyor motors and sort them in descending order;

[0121] Select the highest temperature among all belt conveyor motor temperatures and record it as P;

[0122] If P>Q, all belt conveyors will stop urgently;

[0123] If P is less than Q, no processing is done;

[0124] The Internet-based belt conveyor emergency stop alarm method and system automatically monitors the motor temperature of the belt conveyor and sets the corresponding temperature threshold, allowing the system to automatically perform an emergency stop when the set value is reached or exceeded, thereby avoiding machine damage or potential safety risks caused by excessive temperature. This automated temperature monitoring not only reduces the risks caused by delayed human judgment, but also reduces the monitoring burden of operators, allowing them to focus more on other production monitoring and management tasks. If the motor working in a high temperature environment fails to stop in time, it may damage the motor and cause the entire production line to stop, resulting in high maintenance costs and production losses. The system effectively reduces the frequency of such events through real-time monitoring and intelligent response, ensuring the smoothness and continuity of the production process, which directly affects the reduction of production costs and the improvement of production efficiency.

[0125] include:

[0126] Set quality thresholds;

[0127] Get the quality of all goods;

[0128] If the quality of the goods is greater than the quality threshold, the goods are recorded as large goods;

[0129] If the quality of the goods is less than the quality threshold, the goods are recorded as small goods;

[0130] The Internet-based belt conveyor emergency stop alarm method and system distinguishes large goods from small goods by setting quality thresholds, thereby achieving refined management of different types of goods and effectively improving the safety and efficiency of logistics transportation. In actual operation, large goods may continue to slide for a long distance when the belt conveyor stops suddenly due to their larger mass and higher kinetic energy, which increases the risk of falling at turns or terminals. This differentiated processing based on the size of the goods not only improves the adaptability and flexibility of the system, but also effectively reduces the risks in the transportation process, ensuring logistics efficiency and cargo safety.

[0131] include:

[0132] The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations, specifically including:

[0133] Place large goods on the horizontal belt conveyor;

[0134] Set the running speed of the horizontal belt conveyor, recorded as , in meters per second;

[0135] ;in is the maximum speed of the horizontal belt conveyor;

[0136] Set the emergency stop acceleration of the horizontal belt conveyor, recorded as , unit is meter / ;

[0137] ,in is the maximum emergency stop acceleration of the horizontal belt conveyor;

[0138] Start the horizontal belt conveyor. When the running speed of the horizontal belt conveyor reaches After that, the horizontal belt conveyor Acceleration emergency stop;

[0139] The moment when the horizontal belt conveyor stops suddenly is recorded as ;

[0140] Get The position of the large cargo on the horizontal belt conveyor at that moment is recorded as the first horizontal position;

[0141] After the large cargo stops completely, obtain the position of the large cargo on the horizontal belt conveyor and record it as the second horizontal position;

[0142] Get the distance between the first horizontal position and the second horizontal position, recorded as , in meters;

[0143] Test the emergency stop acceleration of different horizontal belt conveyors , obtain the emergency stop acceleration of each horizontal belt conveyor for large cargo The distance between the first horizontal position and the second horizontal position ;

[0144] Test to obtain the emergency stop acceleration of each horizontal belt conveyor for small cargo The distance between the first horizontal position and the second horizontal position ;

[0145] Test to obtain different horizontal belt conveyor running speeds Emergency stop acceleration of each horizontal belt conveyor for unloading large and small goods The distance between the first horizontal position and the second horizontal position ;

[0146] When the conveyor belt is moving, the goods move with the conveyor belt at the same speed. When the conveyor belt stops suddenly, the emergency stop of the conveyor belt is equivalent to applying an external force to it, causing the conveyor belt to stop. However, if there is not enough friction force acting directly on the goods to stop it, the goods will continue to move at their original speed and direction due to inertia, that is, slide forward.

[0147] The sliding distance depends on many factors, including the mass of the goods, the friction coefficient between the goods and the conveyor belt, the initial speed of the goods, etc. If the friction between the conveyor belt surface and the goods is large enough, the goods may stop quickly. Otherwise, the goods will slide on the conveyor belt for a distance until they gradually slow down and stop due to friction and other reasons.

[0148] include:

[0149] The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations and different goods on the downward belt conveyor remain relatively stationary with the belt, specifically including:

[0150] S1 places the large goods on the downward belt conveyor;

[0151] S2 sets the slope of the downward belt conveyor, recorded as , the unit is degree;

[0152] , The maximum slope of the downward belt conveyor, in degrees;

[0153] set up is 0 degrees;

[0154] S3 sets the running speed of the downward belt conveyor to ;

[0155] ;in is the maximum speed of the horizontal belt conveyor;

[0156] S4 sets the emergency stop acceleration of the downward belt conveyor, recorded as , unit is meter / ;

[0157] ,in The maximum emergency stop acceleration of the downward belt conveyor;

[0158] S5 starts the downward belt conveyor. When the running speed of the downward belt conveyor reaches After that, the belt conveyor goes down to Acceleration emergency stop;

[0159] ;

[0160] If the large cargo does not move on the downward belt conveyor after the downward belt conveyor stops suddenly, the downward belt conveyor's emergency stop acceleration should be increased by 0.1 m / s. ;

[0161] Repeat S5. If the large cargo continues to move on the downward conveyor after the downward conveyor stops suddenly, the acceleration of the downward conveyor at the sudden stop is recorded as , unit is meter / ;

[0162] That is, after the downward belt conveyor with different slopes stops suddenly, the large cargo on the downward belt conveyor will continue to move. The maximum acceleration of the downward belt conveyor at the emergency stop is recorded as , unit is meter / ;

[0163] S5 increases the slope of the downward belt conveyor by 1 degree, and repeats S4-S5;

[0164] Testing different downhill conveyor slopes , get the slope of each downward belt conveyor The corresponding downward belt conveyor with different slopes will continue to move after the large cargo on the downward belt conveyor stops suddenly. ;

[0165] Test to obtain the slope of each downward belt conveyor for small cargo The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the small cargo on the downward belt conveyor will continue to move .

[0166] Test to obtain different downward belt conveyor running speeds The slope of each downward conveyor for large and small cargoes The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the goods on the downward belt conveyor will continue to move ;

[0167] After the downward conveyor belt stops suddenly, the goods on the conveyor belt may continue to move due to inertia. This phenomenon is mainly because when the conveyor belt stops suddenly, the goods still retain their previous momentum and speed. On the downward conveyor belt, in addition to the original forward momentum, gravity will also affect the movement of the goods, so that the goods may continue to move along the slope of the conveyor belt after the conveyor belt stops;

[0168] The distance and speed of the specific movement of goods will be affected by many factors, including the weight of the goods, the slope of the conveyor belt, the friction coefficient between the goods and the conveyor belt, and the speed of the goods before the conveyor belt stops. If the friction of the conveyor belt is large enough, it can slow down the movement of the goods quickly; however, if the friction is not enough to stop the movement of the goods quickly, or the slope is large, then the goods may continue to slide down for a distance.

[0169] include:

[0170] Obtain all the turning points of the belt conveyor, where the turning point refers to a part of a ring formed by two concentric circles;

[0171] The two edges of the belt conveyor at the bend are on the circumference of two concentric circles;

[0172] The radius of the concentric circle with the larger radius is recorded as , the running speed of the edge of the belt conveyor on the concentric circle with a large radius is ;

[0173] The radius of the concentric circle with a smaller radius is , the running speed of the edge of the belt conveyor on the concentric circle with a small radius is ;

[0174] Obtain the center of the concentric circles where the two edges of the belt conveyor are located at the turning point, and record it as the center of the concentric circles;

[0175] Obtain the downward projection of the center of gravity of the cargo in the vertical direction and record it as the center of gravity of the cargo;

[0176] When the belt conveyor stops suddenly;

[0177] Get all the goods above the bend of the belt conveyor;

[0178] For each cargo on the belt conveyor bend,

[0179] Get the center of gravity of the cargo;

[0180] With the center of the concentric circle as the center, draw a circle through the center of gravity of the goods, recorded as the target circle, and the radius of the target circle is the distance from the center of gravity of the goods to the center of the concentric circle, recorded as ;

[0181] Calculate the speed of movement of goods;

[0182] The moving speed of each cargo at the turning point of the belt conveyor is calculated by the following formula:

[0183] ;in It is the moving speed of the goods at the turning point of the belt conveyor;

[0184] Draw a tangent line through the center of gravity of the goods along the conveying direction of the belt conveyor to the target circle, which is recorded as the target tangent line;

[0185] The target tangent intersects with the concentric circle with a larger radius, and the intersection point is recorded as the target point;

[0186] Get the distance between the center of gravity of each cargo and the target point, recorded as ;

[0187] Get the distance between the center of gravity of each cargo and the target point The corresponding movement speed of the goods at the turning point of the belt conveyor The emergency stop acceleration of the horizontal belt conveyor ;

[0188] When an object moves in a circular motion on a disk, it is forced to maintain a circular path due to the rotation of the disk. The reason why the object moves along the circle is that it is constantly acted upon by the centripetal force of the disk, which ensures that the object moves along a path equidistant from the center of the disk.

[0189] If the disk suddenly stops rotating, the object will no longer be subject to the centripetal force required to keep it on its circular path. At this point, according to Newton's first law, the object will continue to move in a straight line in the same state of motion as it did at the moment it stopped. Therefore, the object's trajectory will be a tangent to the edge of the disk;

[0190] Set the emergency stop acceleration of all horizontal belt conveyors Arrange them in order from small to large, and select the smallest horizontal belt conveyor emergency stop acceleration , recorded as the first acceleration.

[0191] Get all down belt conveyors;

[0192] Get the slope of all downward conveyors;

[0193] Get the running speed of all downward conveyors;

[0194] Get all the goods on the downward conveyor belt;

[0195] For each cargo on the downward conveyor belt;

[0196] When the belt conveyor stops suddenly;

[0197] Get the running speed of the downward belt conveyor where the goods are located, recorded as ;

[0198] Get the slope of the downward conveyor where the goods are located ;

[0199] Get the running speed of all goods on the downward belt conveyor at the downward belt conveyor where the goods are located Downward belt conveyor slope The corresponding maximum acceleration of the downward belt conveyor at an emergency stop after the downward belt conveyor with different slopes stops, and the goods on the downward belt conveyor will continue to move ;

[0200] After all the downward belt conveyors with different slopes are stopped urgently, the goods on the downward belt conveyors will continue to move. Maximum emergency stop acceleration of the downward belt conveyors Arrange in order from small to large, and select the minimum acceleration of the downward belt conveyor with different slopes, at which the goods on the downward belt conveyor will continue to move after the downward belt conveyor stops suddenly. , recorded as the second acceleration.

[0201] If the first acceleration is less than the second acceleration, the first acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0202] If the first acceleration is greater than the second acceleration, the second acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop;

[0203] If the goods fall on the conveyor belt after the belt conveyor stops suddenly;

[0204] Get the conveyor belt where the fallen goods are located;

[0205] Alarm at the belt conveyor where the fallen goods are located;

[0206] The Internet-based belt conveyor emergency stop alarm method and system monitors the operating status of the belt conveyor in real time, including speed, acceleration and the position of goods on the belt conveyor. When the belt conveyor stops suddenly, it makes adjustments in advance for situations that may cause goods to fall. The system can automatically calculate the safest emergency stop acceleration, thereby reducing the risk of goods sliding or falling due to inertia caused by the emergency stop, and avoiding any damage to the goods when they suddenly stop from a high-speed moving state. This refined management not only improves the safety of the operation, but also reduces the additional costs caused by product damage, and ensures the stability and reliability of the material transmission process.

[0207] include:

[0208] Transmission module,

[0209] The conveying module is composed of a plurality of horizontal belt conveyors and a plurality of downward belt conveyors;

[0210] Horizontal belt conveyors include non-turnable belt conveyors and turnable belt conveyors. All horizontal belt conveyors are placed horizontally with the ground.

[0211] Each belt conveyor motor is equipped with a temperature sensor for obtaining the temperature of the belt conveyor motor;

[0212] Temperature detection module,

[0213] The temperature detection module is used to detect the motor temperature of the belt conveyor and select the emergency stop of the belt conveyor according to the motor temperature of the belt conveyor;

[0214] Test module,

[0215] The test module is used to test and obtain the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations;

[0216] And test to obtain the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly with different accelerations, and different goods on the downward belt conveyor will not continue to move;

[0217] Data acquisition module,

[0218] Used to obtain the mass of the goods, the center of gravity of the goods, the running speed of the belt conveyor and the slope of the belt conveyor.

[0219] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0220] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A belt conveyor emergency stop alarm method based on the Internet, characterized in that: include: The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations. The acceleration direction is opposite to the conveying direction of the horizontal belt conveyor. The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations, and different goods on the downward belt conveyor remain relatively stationary with the belt, and the acceleration direction is opposite to the transmission direction of the downward belt conveyor; According to the test data, the maximum acceleration of the horizontal belt conveyor at which the goods will not fall at the turning point of the belt conveyor when the belt conveyor stops suddenly is determined, and recorded as the first acceleration; According to the test data, the maximum acceleration of the downward belt conveyor at which the goods remain relatively stationary with the belt when the belt conveyor stops suddenly is determined, and recorded as the second acceleration; If the first acceleration is less than the second acceleration, the first acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop; If the first acceleration is greater than the second acceleration, the second acceleration is selected as the emergency stop acceleration of the belt conveyor during emergency stop; If the goods on the belt conveyor fall after the belt conveyor stops suddenly, an alarm will be issued, and the alarm position is the belt conveyor where the fallen goods are located.

2. The Internet-based belt conveyor emergency stop alarm method according to claim 1, characterized in that: The belt conveyor can be emergency stopped according to the motor temperature, including: Set the temperature threshold Q; Get the temperatures of all belt conveyor motors and sort them in descending order; Select the highest temperature among all belt conveyor motor temperatures and record it as P; If P>Q, all belt conveyors will stop urgently; If P is less than Q, no action is taken.

3. The Internet-based belt conveyor emergency stop alarm method according to claim 1, characterized in that: include: Set quality thresholds; Get the quality of all goods; If the quality of the goods is greater than the quality threshold, the goods are recorded as large goods; If the quality of the goods is less than the quality threshold, the goods will be recorded as small goods.

4. The Internet-based belt conveyor emergency stop alarm method according to claim 3 is characterized in that: include: The test obtains the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations, specifically including: Place large goods on the horizontal belt conveyor; The running speed of the horizontal belt conveyor is , in meters per second; ;in is the maximum speed of the horizontal belt conveyor; Set the emergency stop acceleration of the horizontal belt conveyor, recorded as , unit is meter / ; ,in is the maximum emergency stop acceleration of the horizontal belt conveyor; Start the horizontal belt conveyor. When the horizontal belt conveyor reaches the running speed After that, the horizontal belt conveyor Acceleration emergency stop; The moment when the horizontal belt conveyor stops suddenly is recorded as ; Get The position of the large cargo on the horizontal belt conveyor at that moment is recorded as the first horizontal position; After the large cargo stops completely, obtain the position of the large cargo on the horizontal belt conveyor and record it as the second horizontal position; Get the distance between the first horizontal position and the second horizontal position, recorded as , in meters; Through the above method, the running speed of different horizontal belt conveyors is tested and obtained. Emergency stop acceleration of each horizontal belt conveyor for unloading large and small goods The distance between the first horizontal position and the second horizontal position .

5. The Internet-based belt conveyor emergency stop alarm method according to claim 3, characterized in that: include: The test obtains the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly at different accelerations and different goods on the downward belt conveyor remain relatively stationary with the belt, specifically including: S1. Place the large goods on the downward belt conveyor; S2, set the slope of the downward belt conveyor, recorded as , the unit is degree; , The maximum slope of the downward belt conveyor, in degrees; set up is 0 degrees; S3, set the running speed of the downward belt conveyor to ; ;in is the maximum speed of the horizontal belt conveyor; S4, set the emergency stop acceleration of the downward belt conveyor, recorded as , unit is meter / ; ,in The maximum emergency stop acceleration of the downward belt conveyor; S5, start the downward belt conveyor, when the running speed of the downward belt conveyor reaches After that, the belt conveyor goes down to Acceleration emergency stop; ； If the large cargo does not move on the downward belt conveyor after the downward belt conveyor stops suddenly, the downward belt conveyor's emergency stop acceleration should be increased by 0.1 m / s. ; Repeat S5. If the large cargo continues to move on the downward conveyor after the downward conveyor stops suddenly, the acceleration of the downward conveyor at the sudden stop is recorded as , unit is meter / ; That is, after the belt conveyor stops suddenly, the large cargo on the downward belt conveyor will continue to move. It is recorded as , unit is meter / ; S6, increase the slope of the downward belt conveyor by 1 degree, and repeat steps S4-S5; Through the above method, different running speeds of the downward belt conveyor are tested and obtained. The slope of each downward conveyor for large and small cargoes The corresponding downward belt conveyor with different slopes will continue to move after the goods on the downward belt conveyor stop suddenly. .

6. The Internet-based belt conveyor emergency stop alarm method according to claim 1, characterized in that: include: Obtain all the turning points of the belt conveyor, where the turning point refers to a part of a ring formed by two concentric circles; The two edges of the belt conveyor at the bend are on the circumference of two concentric circles; The radius of the concentric circle with the larger radius is recorded as , the running speed of the edge of the belt conveyor on the concentric circle with a large radius is ; The radius of the concentric circle with a smaller radius is , the running speed of the edge of the belt conveyor on the concentric circle with a small radius is ; Obtain the center of the concentric circles where the two edges of the belt conveyor are located at the turning point, and record it as the center of the concentric circles; Obtain the downward projection of the center of gravity of the cargo in the vertical direction and record it as the center of gravity of the cargo; When the belt conveyor stops suddenly; Get all the goods above the bend of the belt conveyor; For each cargo on the belt conveyor bend, Get the center of gravity of the cargo; With the center of the concentric circle as the center, draw a circle through the center of gravity of the goods, recorded as the target circle, and the radius of the target circle is the distance from the center of gravity of the goods to the center of the concentric circle, recorded as ; Calculate the speed of movement of goods; The moving speed of each cargo at the turning point of the belt conveyor is calculated by the following formula: ;in It is the moving speed of the goods at the turning point of the belt conveyor; Draw a tangent line through the center of gravity of the goods along the conveying direction of the belt conveyor to the target circle, which is recorded as the target tangent line; The target tangent intersects with the concentric circle with a larger radius, and the intersection point is recorded as the target point; Get the distance between the center of gravity of each cargo and the target point, recorded as ; Get the distance between the center of gravity of each cargo and the target point The corresponding movement speed of the goods at the turning point of the belt conveyor The emergency stop acceleration of the horizontal belt conveyor ; Set the emergency stop acceleration of all horizontal belt conveyors Arrange them in order from small to large, and select the smallest horizontal belt conveyor emergency stop acceleration , recorded as the first acceleration.

7. The Internet-based belt conveyor emergency stop alarm method according to claim 1, characterized in that: Get all down belt conveyors; Get the slope of all downward conveyors; Get the running speed of all downward conveyors; Get all the goods on the downward conveyor belt; For each cargo on the downward conveyor; When the belt conveyor stops suddenly; Get the running speed of the downward belt conveyor where the goods are located, recorded as ; Get the slope of the downward conveyor where the goods are located ; Get the running speed of all goods on the downward belt conveyor at the downward belt conveyor where the goods are located Downward belt conveyor slope The corresponding downward belt conveyor with different slopes will continue to move after the goods on the downward belt conveyor stop suddenly. ; After all the downward belt conveyors with different slopes are stopped urgently, the goods on the downward belt conveyors will continue to move. Maximum emergency stop acceleration of the downward belt conveyors Arrange in order from small to large, and select the minimum acceleration of the downward belt conveyor with different slopes, at which the goods on the downward belt conveyor will continue to move after the downward belt conveyor stops suddenly. , recorded as the second acceleration.

8. A system for implementing the Internet-based belt conveyor emergency stop alarm method of claim 1, characterized in that: include: Transmission module, The conveying module is composed of a plurality of horizontal belt conveyors and a plurality of downward belt conveyors; Horizontal belt conveyors include non-turnable belt conveyors and turnable belt conveyors. All horizontal belt conveyors are placed horizontally with the ground. Each belt conveyor motor is equipped with a temperature sensor for obtaining the temperature of the belt conveyor motor; Temperature detection module, The temperature detection module is used to detect the motor temperature of the belt conveyor and select the emergency stop of the belt conveyor according to the motor temperature of the belt conveyor; Test module, The test module is used to test and obtain the distance that different goods on the horizontal belt conveyor continue to move along the conveying direction when the horizontal belt conveyor stops suddenly at different accelerations; And test to obtain the maximum acceleration of the downward belt conveyor when the downward belt conveyor with different slopes stops suddenly with different accelerations, and different goods on the downward belt conveyor will not continue to move; Data acquisition module, Used to obtain the mass of the goods, the center of gravity of the goods, the running speed of the belt conveyor and the slope of the belt conveyor.

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