A chute internal operation state detection method

Abstract

The application provides a chute internal operation state detection method, and relates to the technical field of coal preparation, specifically comprising: a distance measuring component, which is installed on the outer wall of the chute and can detect the position of the coal flow; the chute internal operation state detection method comprises the following steps: determining an operation state alarm threshold; detecting the distance value from the target material by using the distance measuring component; calculating the change rate of the distance value in a preset time period; determining the current chute internal operation state according to the change rate of the distance value and the distance value; comparing the distance value corresponding to the current chute internal operation state with the operation state alarm threshold to determine whether to execute the alarm step; in summary, the application can avoid the damage or reduced sensitivity of the detection mechanism caused by the impact of the materials in the chute, ensure the long-term stable operation of the detection component, and improve the accuracy and real-time performance of the chute internal operation state detection result.

Description

Technical Field

[0001] This invention relates to the field of coal preparation technology, and in particular to a method for detecting the internal operating status of a chute. Background Technology

[0002] In the coal preparation process of coal preparation plants, various chutes are widely used as transition channels for materials. The design of chutes is governed by relevant design standards, which specify clear requirements for their angles, dimensions, and materials.

[0003] However, in actual production, chute blockages can occur. Since chutes are mostly enclosed structures, blockages are difficult to detect and can easily lead to excessive material accumulation, eventually causing damage to the upstream conveyor belt and other components, resulting in significant losses.

[0004] Current methods for detecting the internal operating status of sluices involve sensing deformation caused by contact between a detection mechanism and the material inside the sluice. However, this method can lead to damage to the detection mechanism or reduced sensitivity, gradually decreasing the accuracy of the detection results. Summary of the Invention

[0005] The purpose of this invention is to provide a method for detecting the internal operating status of a chute, so as to solve the technical problem of low accuracy of the detection results of the internal operating status of a chute.

[0006] This invention provides a method for detecting the internal operating status of a chute, comprising: a ranging component installed on the outer wall of the chute to detect the position of the coal flow; the method comprising:

[0007] Determine the alarm threshold for the operating status;

[0008] The distance to the target material is detected using the ranging component.

[0009] Calculate the rate of change of distance values ​​within a preset time period;

[0010] The current operating state inside the chute is determined based on the rate of change of the distance value and the distance value itself.

[0011] The distance value corresponding to the current internal operating state of the chute is compared with the operating state alarm threshold to determine whether to execute the alarm step.

[0012] Furthermore, the current internal operating state of the chute can be any of the following: empty chute state, material running state, or chute blockage state.

[0013] Furthermore, the step of determining the alarm threshold specifically includes:

[0014] Simulate the blockage state of the chute;

[0015] The distance to the target material is detected using the ranging component.

[0016] Calculate the rate of change of distance values ​​within a preset time period and generate a distance value fluctuation curve;

[0017] The alarm threshold for the operating status is determined based on the distance value fluctuation curve.

[0018] Furthermore, the range of the operating status alarm threshold is the peak value and trough value of the distance value fluctuation curve.

[0019] Furthermore, the alarm threshold for the operating status and the parameters of the ranging component are dynamically adjusted based on real-time data from the distance fluctuation curve.

[0020] Furthermore, the specific steps for determining whether to execute an alarm by comparing the distance value corresponding to the current internal operating state of the chute with the operating state alarm threshold are as follows:

[0021] A preset processing method is used to statistically analyze N distance values ​​within M seconds;

[0022] The results of the statistical analysis are compared with the operating status alarm threshold to determine whether to execute the alarm procedure.

[0023] Furthermore, the method specifically includes:

[0024] The N*M data are statistically calculated using a head-out, tail-in queue filling method. The queue result is calculated once every S data replacements, that is, a calculation result is obtained every S / N seconds.

[0025] Calculate the mean difference or root mean square error from the results data within M seconds;

[0026] When the average difference or root mean square difference is within the alarm threshold range of the operating state and is less than the blockage distance Ld, the current operating state inside the chute is determined to be the chute blockage state, and the alarm step is executed.

[0027] Furthermore, invalid data is removed from the statistical data queue based on the filtering criteria.

[0028] Furthermore, both the transmitting port of the transmitting device and the receiving port of the receiving device face the sidewall inside the chute.

[0029] Furthermore, a vibration motor is installed at the easily clogged section of the chute. When an alarm signal is triggered, the vibration motor is activated to vibrate and clear the blockage in the chute.

[0030] The technical solution provided by the embodiments of the present invention brings the following beneficial effects: The chute provided by the embodiments of the present invention includes: a ranging component, which is installed on the outer wall of the chute to detect the position of the coal flow. The method for detecting the internal operating status of the chute includes: determining an operating status alarm threshold; using the ranging component to detect the distance value from the target material; calculating the rate of change of the distance value within a preset time period; determining the current internal operating status of the chute based on the rate of change of the distance value and the distance value; comparing the distance value corresponding to the current internal operating status of the chute with the operating status alarm threshold to determine whether to execute the alarm step. In summary, this application, through this non-contact method for detecting the internal operating status of the chute, can avoid damage or reduced sensitivity of the detection mechanism due to the impact of materials inside the chute, ensuring the long-term stable operation of the detection component, thereby improving the accuracy and real-time performance of the detection results of the internal operating status of the chute. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 A flowchart illustrating a method for detecting the internal operating status of a chute according to an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the structure of the chute internal operating status detection component provided in an embodiment of the present invention is shown;

[0034] Figure 3 A schematic diagram of the installation position structure of the chute internal operating status detection component provided in an embodiment of the present invention is shown;

[0035] Figure 4 This diagram illustrates a data curve formed by the result values ​​detected by the detection component provided in an embodiment of the present invention.

[0036] Figure 5 A schematic diagram of the internal operating status detection system of the chute provided in an embodiment of the present invention is shown. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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 are within the scope of protection of the present invention.

[0038] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description in order to avoid unnecessarily obscuring the invention.

[0039] Currently, methods for detecting the internal operating status of chutes include: rotary paddle level detection, which uses a motor to drive a rotating component; when material blocks the chute and the level rises, the rotating component stops, outputting a blockage signal; plate-type chute switches, consisting of a detection plate and limit switches; the detection plate tilts outward under material pressure, triggering the limit switch; mercury anti-blockage switches, also called tilt switches, are vertically suspended tilt switches that activate when subjected to external force and deviate from their vertical position by more than 15 degrees, sending a blockage signal; and other methods utilize the accumulation of material or pressure on the sidewalls after blockage, combined with photoelectric switches or proximity switches for detection. However, because the pressure values ​​used for judgment vary depending on the type of material or the chute structure, it is difficult to effectively distinguish fault characteristics using detection values, resulting in many application limitations and a high false alarm rate.

[0040] Because the chute is a closed environment with significant pollution, plant vibrations are substantial. Furthermore, most mechanical detection systems require installation inside the chute for easy triggering. Due to installation limitations, dust accumulation, particle blockage, and material impacts during normal operation can damage the detection mechanism or reduce its sensitivity. Currently, most coal preparation plants using mechanical chute anti-blockage detection systems have poor practical application results and struggle to achieve long-term stable operation. For detection systems using laser beam sensors, both a transmitter and receiver are required. Often, installation limitations, or blockages caused by material movement, coal slime, or dust, can lead to numerous false alarms and a lack of reliability for long-term accurate operation.

[0041] The current method for detecting the internal operating status of a chute is a trigger-based method. This detection mechanism is prone to collisions with materials and other objects inside the chute, which can damage the detection mechanism or reduce its sensitivity, thus reducing the accuracy of the detection results.

[0042] Based on this, the present invention provides a method for detecting the internal operating status of a chute, which can solve the technical problem of low accuracy of the detection results of the internal operating status of a chute in the prior art.

[0043] To facilitate understanding of this embodiment, a method for detecting the internal operating status of a chute disclosed in this embodiment of the invention will first be described in detail.

[0044] This invention provides a method for detecting the internal operating status of a chute, comprising: a ranging component, which is installed on the outer wall of the chute to detect the position of the coal flow. Specifically, the detection end of the ranging component faces the inside of the chute through an observation window. For example, the ranging component in this embodiment can be set as a distance sensor. In addition, theoretically, the closer the ranging component is to the feed point, the more it can cover all the blockage points in the chute. However, the timeliness will be relatively slow, and the slower the response, the more difficult the cleaning. Therefore, preferably, the ranging component can be set to cover the few blockage points with the largest amount of blockage.

[0045] The method specifically includes:

[0046] S101: Determine the alarm threshold for the operating status;

[0047] S102: Detect the distance to the target material using the ranging component;

[0048] S103: Calculate the rate of change of distance values ​​within a preset time period;

[0049] S104: Determine the current internal operating state of the chute based on the rate of change of the distance value and the distance value;

[0050] S105: Compare the distance value corresponding to the current internal operating state of the chute with the operating state alarm threshold to determine whether to execute the alarm step.

[0051] Specifically, the current internal operating state of the chute can be any of the following: empty chute, material flow, or chute blockage. For ease of understanding, please refer to... Figure 4The graph shows time on the horizontal axis and distance on the vertical axis. It is clear from the graph that the curves at positions 300 and 320 have smaller fluctuations and are relatively flat. Furthermore, the distance value corresponding to the curve at position 300 is greater than that corresponding to the curve at position 320. Therefore, it can be determined that the curve at position 300 represents an empty chute, while the curve at position 320 represents a blocked chute. The curve at position 310 shows very obvious fluctuations, which can be determined as the material flow state.

[0052] To more accurately determine the current operating state inside the chute, it is preferable to make a judgment based on the rate of change of the distance value and the distance value itself. Specifically, when the rate of change of the current distance value is less than a preset threshold for the rate of change of the distance value, and the current distance value is less than a preset threshold for the distance value, the operating state inside the chute is determined to be the chute blockage state.

[0053] Similarly, when the rate of change of the current distance value is less than the preset distance value change rate threshold and the current distance value is greater than the preset distance value threshold, the internal operating state of the chute is determined to be the empty chute state.

[0054] Similarly, when the rate of change of the current distance value is within the preset distance change rate threshold, the internal operating state of the chute is determined to be the material operating state.

[0055] Specifically, the ranging component includes: a transmitter 101 of the distance sensor, the transmitter's emission port facing the inside of the chute, for transmitting ranging pulses to the target;

[0056] The distance sensor's receiving device 102 has its receiving port facing the inside of the chute, and is used to receive the reflection of the ranging pulse emitted by the object to the target object and reflected back.

[0057] In addition, to complement the ranging component's detection, the chute's internal operating status detection component also includes:

[0058] Timer 103, connected to the transmitting device and the receiving device, is used to calculate the time interval between the transmitting device transmitting a ranging pulse to the receiving device receiving the reflected pulse, and to calculate the rate of change of the distance value based on the time interval value.

[0059] The processor 104, connected to the timer, is used to determine the current internal operating state of the chute based on the rate of change of the distance value and the distance value itself; and to compare the distance value corresponding to the current internal operating state of the chute with the operating state alarm threshold to determine whether to execute an alarm step.

[0060] An alarm device, connected to the processor, is used to issue a warning alarm when the processor determines that the internal operating state of the chute is that the chute is blocked.

[0061] In this embodiment of the application, an alarm signal can be issued when a blockage is detected inside the chute. For example, when the time interval is preset, i.e., when a blockage is detected inside the chute, a real-time alarm can be issued to prompt staff to take measures as soon as possible to improve the maintenance efficiency of the chute.

[0062] In summary, this application, through this non-contact method for detecting the internal operating status of a chute, can avoid damage to the detection mechanism or reduction in sensitivity caused by impacts from materials inside the chute, ensuring the long-term stable operation of the detection components, thereby improving the accuracy and real-time performance of the detection results for the internal operating status of the chute.

[0063] In some embodiments, the ranging component includes any one or more of the following: a laser ranging sensor, an ultrasonic ranging sensor, and an infrared ranging sensor; the ranging pulse object includes any one or more of the following: a laser pulse, an ultrasonic pulse, and an infrared pulse.

[0064] In practical applications, infrared, laser, or ultrasonic ranging sensors can be used to collect data on the operating status inside the chute. Specifically, the transmitting device can emit a beam or sequence of short pulsed laser beams, pulsed ultrasonic waves, or pulsed infrared rays towards the target material inside the chute. The receiving device receives the waves or beams reflected back from the pulses. A timer can measure the time from emission to reception to calculate the time interval between the sound wave or beam and the target material. Based on the time interval, the distance value is determined, and the rate of change of the distance value is calculated. Thus, the processor can determine the current operating status inside the chute based on the rate of change of the distance value and the distance value itself. The processor then compares the distance value corresponding to the current operating status inside the chute with the operating status alarm threshold to determine whether to execute an alarm step.

[0065] Therefore, laser ranging sensors, ultrasonic ranging sensors, infrared ranging sensors, etc., can be fully applied to the data acquisition process of materials running inside the chute, so as to achieve effective detection of the running status of materials inside the chute.

[0066] In some embodiments, such as Figure 3 As shown, the transmitting port of the transmitting device and the receiving port of the receiving device both face the side wall inside the chute. In this embodiment, the distance sensor does not need to be installed inside the chute, nor does it need to be installed relative to it; it only needs that both the transmitting port and the receiving port face the inside of the chute, such as the side wall inside the chute. Therefore, the installation flexibility is greatly enhanced, and the long measuring range can adapt to various chute sizes or installation distances.

[0067] Figure 4This diagram illustrates the distance fluctuation curve formed by multiple current chute internal operating status results detected by the detection component provided in this embodiment. By collecting data on empty chute status, material running status, and chute blockage status, corresponding algorithms can be used for analysis to distinguish the data characteristics of these three states, thus differentiating different chute internal operating states. This allows staff to directly and intuitively obtain status information, and various methods can be used to process the data to obtain corresponding alarm values. Therefore, the design of this embodiment not only digitizes the internal operating status of the chute but also determines the operating status alarm threshold through data filtering, analysis, and calculation. Combined with software program settings, it enables timely alarms, shortens the alarm cycle, and provides rapid response. In practical applications, dust, particles, and other interfering factors inside the enclosed chute can be cleaned and filtered through methods such as detecting data values, patterns, and time-accumulated data to reduce the false alarm rate.

[0068] In one embodiment of the present invention, the step of determining the alarm threshold specifically includes:

[0069] Simulate the blockage state of the chute;

[0070] The distance to the target material is detected using the ranging component.

[0071] Specifically, data characteristics such as distance value and data fluctuation range are obtained when the target material is blocked.

[0072] Calculate the rate of change of distance values ​​within a preset time period and generate a distance value fluctuation curve;

[0073] The alarm threshold for the operating status is determined based on the distance value fluctuation curve.

[0074] Preferably, the range of the operating status alarm threshold is the peak value and trough value of the distance value fluctuation curve; more preferably, the operating status alarm threshold and the parameters of the ranging component are dynamically adjusted according to the real-time data of the distance fluctuation curve; in summary, the design of this embodiment can achieve rapid alarm response, ensure that the blockage is minimized, and improve the unblocking efficiency.

[0075] In one specific embodiment, the ranging component is first installed at a location where the coal flow direction can be easily detected. Then, the normal operation status of the chute is tracked, and the ranging component records data fluctuations and distance values. Next, the outlet of the chute is manually blocked to simulate a chute blockage. Then, the ranging component is used to detect the coal flow in the area between the blockage point and the ranging component, and multiple sets of detected data are used to generate a distance value fluctuation curve. Once the distance value fluctuation curve stabilizes, the peak and trough values ​​of the curve are determined as the operating status alarm threshold. When the distance value of the current target material is detected to be less than the minimum operating status alarm threshold, or less than the lower limit value Lm detected by the ranging component, it is determined that the chute is blocked, and an alarm signal is sent to the staff.

[0076] More preferably, since the coal quality may vary in different mining areas—some mines may have larger coal blocks or higher moisture content, while others may have smaller coal blocks—using the same alarm threshold and ranging component parameters for detection would lead to inaccurate detection and alarms, ultimately causing chute blockage and accidents. The design of this embodiment effectively avoids these problems. For different coal quality conditions, a corresponding distance fluctuation curve is generated, thus determining different operating state alarm thresholds. Based on these operating state alarm thresholds, the parameters of the ranging component are dynamically adjusted, thereby improving alarm response. In other words, the chute detection method of this embodiment can adaptively adjust the alarm threshold and the parameters of the ranging component. More specifically, when the ranging component detects large particles, the sampling frequency of the ranging component is reduced to ensure detection effectiveness; conversely, when detecting small particles with higher density, the sampling frequency of the ranging component is increased to ensure stronger data fluctuation.

[0077] Furthermore, the upper and lower limits of the alarm threshold can be adjusted in real time according to the coal particle size. For example, when the coal particle size is small and uniform, the upper and lower limits of the alarm threshold can be set narrower, i.e., close to the curve. Conversely, when the coal particle size is large or the moisture content is high, the upper and lower limits of the alarm threshold can be set wider. In other words, for some coal flows, we can set the upper and lower fluctuation values ​​of the curve to 1 for alarm, while for other coal flows, we need to set the upper and lower fluctuation values ​​of the curve to 5 for alarm. The specific adjustment can be made in real time according to the coal particle size.

[0078] In one embodiment of the present invention, the specific steps for determining whether to execute an alarm step by comparing the distance value corresponding to the current internal operating state of the chute with the operating state alarm threshold are as follows:

[0079] A preset processing method is used to statistically analyze N distance values ​​within M seconds;

[0080] The results of the statistical analysis are compared with the operating status alarm threshold to determine whether to execute the alarm procedure.

[0081] In one embodiment of the present invention, the method specifically comprises:

[0082] The N*M data are statistically calculated using a head-out, tail-in queue filling method. The queue result is calculated once every S data replacements, that is, a calculation result is obtained every S / N seconds.

[0083] Calculate the mean difference or root mean square error from the results data within M seconds;

[0084] When the average difference or root mean square difference is within the alarm threshold range of the operating state and is less than the blockage distance Ld, the current operating state inside the chute is determined to be the chute blockage state, and the alarm step is executed.

[0085] In one embodiment of the present invention, invalid data is removed from the statistical data queue based on filtering criteria. We specifically propose a method for more accurately determining the alarm threshold for operational status, which will be illustrated with examples for ease of understanding.

[0086] Set the empty chute distance as L0, the lower limit detection distance of the ranging component as Lm, the blockage distance as Ld, and the acquisition frequency of the ranging component as N data points per second, L1L2L3...Ln. Calculate the data results over M seconds.

[0087] Data filtering logic:

[0088] Real-time ranging value L: greater than L0 and less than Lm, is invalid data and will not be included in the statistical data queue for calculation.

[0089] Data analysis logic:

[0090] Method 1:

[0091] Statistical calculations are performed on N*M data points using a queue filling method, with the first data point out of the queue and the last data point in the queue. A calculation result is obtained every S / N seconds, and the average result is calculated as E, where E = ∑L(N*M) / N*M. The average difference of the results within M seconds is calculated, and an average difference threshold range is set. When the average difference is within the threshold range and less than Ld, a blockage is determined, and an alarm signal is given.

[0092] Here, S represents the amount of data to be replaced, used to improve calculation accuracy. For example, if we want to collect 30 data points, to ensure continuous detection, we calculate the results of these 30 data points by replacing S data points. For the initial 1-30 data points, after replacing the first data point, we group 2-31 together. This achieves continuous calculation by performing a calculation after replacing each data point, ultimately improving the accuracy of the calculation. The specific number of data points to replace can be set according to the program's examples and the actual response requirements on site.

[0093] Method 2:

[0094] Statistical calculations are performed on N*M data points using a queue-filling method, with the first element leaving and the last element entering. A calculation result is obtained every S / N seconds. The mean squared error (MSE) of the N*M data points is calculated as E. A threshold range for the MSE is set. When the MSE is within the threshold range and less than Ld, a blockage is detected, and an alarm signal is issued. This method is preferred because it reflects data fluctuations more significantly.

[0095] Method 3:

[0096] The difference between the real-time values ​​L and Ld is calculated as E = (Ld - L). Positive values ​​are taken as valid data. A threshold range is set. When N*M data results are all within the threshold range within M consecutive seconds, it is determined to be a blockage and an alarm signal is issued.

[0097] Method 4:

[0098] Set a numerical range threshold. When the real-time value L is within the range threshold, it is considered valid data. Perform statistical calculations on N*M data in a queue filling method, with the filling method being head out and tail in. The number of data to be replaced can be set to S. S affects the period of outputting results, i.e., a calculation result is obtained every S / N seconds. Calculate the percentage of valid data and set a percentage threshold. When the results within M seconds are all greater than (or a percentage can be set) the percentage threshold, it is considered a blockage and an alarm signal is given.

[0099] For example, due to the installation location or conditions, there may not be much coal or coal coming to this location normally. However, after setting this distance, when the location is blocked, coal will definitely come to this location. If the distance value of less than 150 reaches 90% or more within 3 seconds, it is considered to be blocked.

[0100] Based on the above embodiments, a vibration motor is installed at the easily clogged part of the chute. When the alarm signal is triggered, the vibration motor is started to vibrate and clear the blockage in the chute. More preferably, the motor parameters of the vibration motor can be dynamically adjusted according to the dynamic adjustment of the alarm threshold, thereby ensuring the blockage removal effect.

[0101] Based on the above embodiments, a gimbal can be provided below the ranging component. The gimbal can drive the ranging component to move along the X and Y axes. In this embodiment, a transparent window can be provided along the connecting line of each blockage point. The ranging component sends a ranging signal into the chute through the transparent window, and the gimbal can drive the ranging component to move along the trajectory, so as to realize that the ranging component corresponds to different blockage points as needed, thereby improving the accuracy of the detection of blockage points and reducing blockage.

[0102] This invention provides a chute internal operating status detection system, such as... Figure 5 As shown, the chute internal operating status detection system 400 includes: a terminal 401 and the chute internal operating status detection component provided in Embodiment 2 above;

[0103] The terminal 401 is wirelessly connected to the internal operating status detection component 100 of the chute.

[0104] The terminal is used to receive and display the internal operating status of the chute sent by the internal operating status detection component.

[0105] The terminal enables remote staff to obtain real-time information on the internal operating status of the chute, facilitating prompt action and improving chute maintenance efficiency.

[0106] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0107] In the description of this application, unless otherwise stated, "at least one" means one or more. For example, at least one USB device means one USB device or more USB devices.

[0108] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0109] In some embodiments, the processor may be an integrated circuit chip with signal processing capabilities. During implementation, the aforementioned functions can be accomplished through instructions from the integrated logic circuitry of the processor's hardware. The processor may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the functions disclosed in the embodiments of this invention. The functions disclosed in the embodiments of this invention can be directly manifested as being executed by a hardware decoding processor, or executed by the hardware within the decoding processor.

[0110] 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 method for detecting the internal operating status of a chute, characterized in that, include: The ranging component, installed on the outer wall of the chute, is capable of detecting the position of the coal flow. The method includes: Simulates material blockage in a chute; The distance to the target material is detected using the ranging component. Calculate the rate of change of distance values ​​within a preset time period and generate a distance value fluctuation curve; The operating status alarm threshold is determined based on the distance value fluctuation curve. The distance to the target material is detected using the ranging component. Calculate the rate of change of distance values ​​within a preset time period; The current operating state inside the chute is determined based on the rate of change of the distance value and the distance value itself. The N*M data are statistically calculated using a head-out, tail-in queue filling method. The queue result is calculated once every S data replacements, that is, a calculation result is obtained every S / N seconds. Calculate the mean difference or root mean square error from the results data within M seconds; When the average difference or root mean square difference is within the alarm threshold range of the operating state and is less than the blockage distance Ld, the current operating state inside the chute is determined to be the chute blockage state, and the alarm step is executed.

2. The method for detecting the internal operating status of a chute according to claim 1, characterized in that, The current internal operating state of the chute is any one of the following: empty chute, material running, or chute blocked.

3. The method for detecting the internal operating status of a chute according to claim 2, characterized in that, The alarm threshold range for the operating status is the peak and trough values ​​of the distance value fluctuation curve.

4. The method for detecting the internal operating status of a chute according to claim 2, characterized in that, The alarm threshold for the operating status and the parameters of the ranging component are dynamically adjusted based on real-time data from the distance fluctuation curve.

5. The method for detecting the internal operating status of a chute according to claim 1, characterized in that, Invalid data is removed from the statistical data queue based on the filtering criteria.

6. The method for detecting the internal operating status of a chute according to claim 1, characterized in that, The ranging component includes a transmitter of a distance sensor and a receiver of a distance sensor, wherein the transmitter port of the transmitter and the receiver port of the receiver both face the sidewall inside the chute.

7. The method for detecting the internal operating status of a chute according to claim 1, characterized in that, A vibration motor is installed at the easily clogged section of the chute. When the alarm signal is triggered, the vibration motor is started to vibrate and clear the blockage in the chute.

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