Belt sampling time point control method and device, electronic equipment and storage medium

Abstract

The invention provides a belt sampling time point control method and device, electronic equipment and a storage medium, and relates to the technical field of monitoring, contour information of coal flow on a conveying belt is obtained in real time in a non-contact measurement mode, and meanwhile, the sampling triggering moment is dynamically determined in combination with the running speed of the belt, so that the sampling time point is controlled. And the sampling trigger moment, the coal flow existence detection signal and the periodic sampling signal are subjected to interlocking logic judgment, so that the problems that in the prior art, as a contact type mechanical baffle is adopted for detection, the coal flow state is judged by depending on a fixed height threshold value and the belt speed change cannot be dynamically adapted can be solved; and meanwhile, the problems of low detection precision, inaccurate sampling trigger time and insufficient sampling representativeness caused by lack of effective interlocking with coal flow existence and periodic signals are solved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of monitoring, and in particular to a belt sampling time point control method and device, electronic equipment and a storage medium. BACKGROUND

[0002] The belt sampling machine is a core quality control device for trade settlement and production allocation of incoming coal in a thermal power plant, and is widely used in coal bulk conveying systems. The traditional technology cooperates mechanical baffles, proximity switches and a PLC control system to build a physical contact type sampling trigger mechanism, covering coal flow detection, signal generation, sampling execution and other links, and relies on the combination logic of the baffle overturning angle and the fixed height threshold to control the sampling time, which has evolved from pure mechanical type to mechatronics, but is always limited by the detection accuracy in the dynamic coal flow environment.

[0003] The existing mechanical sampling control has obvious defects: the fixed height threshold is used to determine the coal flow state, and there is a lack of real-time sensing ability of dynamic coal flow parameters. When the belt speed fluctuates, the sampling time point cannot be dynamically adjusted, resulting in insufficient sampling representativeness and high false triggering rate; at the same time, the change of coal flow speed will cause the baffle reset lag, further increasing the false triggering frequency, affecting the accuracy of trade settlement data and the rationality of production parameter configuration. In addition, mechanical parts are prone to wear and jam, shortening the equipment failure interval, and manual intervention also brings safety risks to the operators. SUMMARY

[0004] The present disclosure provides a belt sampling time point control method and device, electronic equipment and a storage medium. The main purpose is to at least solve one of the technical problems in the related art to some extent.

[0005] According to a first aspect of the present disclosure, a belt sampling time point control method is provided, comprising: obtaining the profile information of the coal flow on the conveying belt in real time by a non-contact measurement method; dynamically determining the sampling trigger time based on the profile information and the belt running speed; controlling the sampling head to perform a sampling action according to the sampling trigger time, and performing interlocking logic judgment with the coal flow existence detection signal and the periodic sampling signal.

[0006] Optionally, the profile information of the coal flow on the conveying belt is obtained in real time by a non-contact measurement method, comprising: setting a profile scanning sensor and a height limiting baffle upstream of the sampling operation position; continuously collecting the profile data of the upper surface of the coal flow by the profile scanning sensor, and generating a time sequence of profile curved surfaces.

[0007] Optionally, the profile scanning sensor is a laser line scanning sensor, which is installed at a height higher than the height limiting baffle, and the height limiting baffle is used to limit the maximum height of the coal flow to protect the sensor.

[0008] Optionally, the dynamic determination of the sampling trigger time comprises: determining whether the height of the coal flow reaches a preset threshold according to the profile information; when the height of the coal flow meets the condition, calculating the delay time of the sampling action according to the distance between the sensor and the sampling point and the belt speed.

[0009] Optionally, the interlocking logic judgment comprises: generating a sampling instruction when the existence of the coal flow, the arrival of the sampling period, and the profile information meeting the sampling condition are detected at the same time.

[0010] Optionally, it further comprises: real-time monitoring of the working state of the sensor, and automatically triggering a fault alarm and pausing the sampling process when an abnormal signal or a response timeout is detected.

[0011] According to a second aspect of the present disclosure, a belt sampling time point control device is provided, comprising: an acquisition unit configured to acquire profile information of a coal flow on a conveying belt in real time through a non-contact measurement method; a determination unit configured to dynamically determine a sampling trigger time based on the profile information and the belt running speed; a control unit configured to control a sampling head to perform a sampling action according to the sampling trigger time, and perform an interlocking logic judgment with a coal flow existence detection signal and a periodic sampling signal.

[0012] Optionally, the acquisition unit is further configured to: set a profile scanning sensor and a height limiting baffle upstream of the sampling operation position; continuously collect profile data of the upper surface of the coal flow through the profile scanning sensor, and generate a time series of profile surfaces.

[0013] Optionally, the profile scanning sensor is a laser line scanning sensor, which is installed at a height higher than the height limiting baffle, and the height limiting baffle is used to limit the maximum height of the coal flow to protect the sensor.

[0014] Optionally, the determination unit is further configured to: determine whether the height of the coal flow reaches a preset threshold according to the profile information; when the height of the coal flow meets the condition, calculate the delay time of the sampling action according to the distance between the sensor and the sampling point and the belt speed.

[0015] Optionally, the interlocking logic judgment comprises: When the coal flow existence is detected, the sampling period arrives, and the profile information meets the sampling condition, a sampling instruction is generated.

[0016] Optionally, the method further comprises: The monitoring unit is configured to monitor the working state of the sensor in real time, and automatically trigger a fault alarm and suspend the sampling process when detecting signal abnormality or response timeout.

[0017] According to a third aspect of the present disclosure, an electronic device is provided, comprising: at least one processor; and a memory connected with the at least one processor in communication; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method of the first aspect.

[0018] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to perform the method of the first aspect.

[0019] According to a fifth aspect of the present disclosure, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the method of the first aspect.

[0020] The belt sampling time point control method and device, electronic device and storage medium provided by the present disclosure can solve the problems of low detection accuracy, inaccurate sampling trigger time and insufficient sampling representativeness in the prior art by acquiring the profile information of the coal flow on the conveying belt in real time through a non-contact measurement method, dynamically determining the sampling trigger time in combination with the belt running speed, and performing interlocking logic judgment on the sampling trigger time, the coal flow existence detection signal and the periodic sampling signal. Thus, the real state of the coal flow can be accurately grasped, the belt running condition can be dynamically matched to determine the best sampling time, and sampling is performed only when it is confirmed that there is coal flow and the periodic sampling requirements are met, thereby improving the sampling accuracy, representativeness and reliability.

[0021] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are used to better understand the present scheme and do not constitute a limitation on the present disclosure. Among them: Figure 1 A flowchart of a belt sampling time point control method provided by an embodiment of the present disclosure; Figure 2 A structural diagram of a belt sampling time point control device provided by an embodiment of the present disclosure; Figure 3 A schematic block diagram of an example electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, which include various details of the embodiments of the present disclosure to help understanding, and should be considered as merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Also, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0024] The belt sampling time point control method and device, electronic device and storage medium of the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0025] Figure 1 A flowchart of a belt sampling time point control method provided by an embodiment of the present disclosure.

[0026] As Figure 1 shown, the method includes the following steps: Step 101, real-time acquisition of profile information of the coal flow on the conveying belt by a non-contact measurement method.

[0027] In the embodiments of the present disclosure, to accurately acquire the real state of the coal flow on the conveying belt to support subsequent sampling opportunity determination, a non-contact measurement technology is adopted in this step, and an appropriate profile measurement device is deployed at a preset monitoring position of the coal flow transmission path of the conveying belt. The device can capture and collect the profile information of the upper surface of the coal flow in the conveying process without physical contact with the coal flow or the belt, and the acquired profile information can reflect the morphological characteristics of the coal flow in the width direction and the thickness direction of the belt, providing basic data support for subsequent dynamic determination of the sampling trigger time based on the actual state of the coal flow. As an implementation, a profile scanning sensor can be used as a non-contact measurement device, which is installed at a suitable position on the upstream side of the conveying belt coal flow. At the same time, the sensor is equipped with a shell and airflow protection structure to cope with the influence of harsh environments such as coal dust and airflow, the sensor installation direction can be set perpendicular to the coal conveying side of the belt, and the installation height can be adjusted to adapt to the coal flow height range under different working conditions, so as to stably acquire the profile data of the coal flow.

[0028] The step effectively avoids the problems of component wear caused by physical contact and detection deviation caused by coal flow impact in traditional contact measurement (such as mechanical baffle) through non-contact measurement, and improves the reliability and service life of coal flow profile information collection; at the same time, the "real-time" collection characteristics ensure the synchronicity of the coal flow profile data and the coal flow transmission state, provide basis data with strong timeliness and high accuracy for subsequent dynamic calculation of sampling time, and avoid sampling deviation caused by data lag.

[0029] Step 102, dynamically determining a sampling trigger time based on the profile information and the belt running speed.

[0030] In the embodiment of the present disclosure, in order to realize accurate matching of the sampling trigger time and the actual transmission state of the coal flow, the step first acquires the real-time running speed parameter of the conveying belt, and then comprehensively analyzes the coal flow profile information collected in step 101: based on the profile information, it is judged whether the coal flow meets the preset sampling form requirements (such as the thickness and distribution uniformity of the coal flow meeting the sampling representative standard), and according to the fixed distance between the coal flow monitoring position corresponding to the profile information and the sampling operation area, combined with the real-time acquired belt running speed, the time difference required for the coal flow to be transmitted from the monitoring position to the sampling operation area is calculated through kinematics, and then the time when the coal flow meets the sampling form requirements is superimposed with the time difference, to dynamically generate the corresponding sampling trigger time, so as to ensure that the sampling action can be accurately performed when the coal flow reaches the sampling operation area and the state meets the requirements. As an implementation manner, the target profile curve and the corresponding scanning time that meet the sampling conditions can be selected from the coal flow profile curve acquired by the profile scanning sensor, and then the real-time running speed V of the belt is acquired by the speed measuring device, the lag time T=L / V is calculated combined with the distance L between the monitoring position and the sampling operation area, and finally the scanning time of the target profile curve is added to the lag time to obtain the sampling trigger time.

[0031] The step dynamically calculates the trigger time by combining the actual profile information of the coal flow and the real-time running speed of the belt, completely solves the defects of the traditional technology that relies on fixed height threshold and cannot adapt to speed fluctuations, avoids the mis-sampling caused by the time deviation of the coal flow reaching the sampling area due to speed changes; at the same time, the profile information is used to judge whether the coal flow form is qualified, which further ensures that the coal flow state is representative at the sampling time, lays a foundation for subsequent accurate coal sample acquisition, and reduces the problem that the coal sample cannot reflect the overall coal quality due to the deviation of the sampling time.

[0032] Step 103, controlling the sampling head to perform a sampling action according to the sampling trigger time, and performing interlocking logic judgment with the coal flow existence detection signal and the periodic sampling signal.

[0033] In the embodiment of the present disclosure, in order to ensure that the sampling action is accurately performed under the double conditions of meeting the actual state of the coal flow and the sampling rule, the sampling trigger time determined in step 102 is used as the basis for control in this step, and a coal flow existence detection signal and a periodic sampling signal are introduced to construct a multi-condition interlocking logic judgment mechanism. This mechanism first verifies the effectiveness of the three signals. Only when the three conditions of the sampling trigger time reaching, the coal flow existence detection signal confirming that there is coal on the belt, and the periodic sampling signal meeting the preset sampling period requirement are met at the same time, the sampling head action instruction is generated to control the sampling head to perform the sampling action in the preset sampling operation area. If any signal does not meet the condition, the sampling action is not triggered to avoid unnecessary sampling or invalid sampling. As an implementation, the interlocking logic judgment can be realized by the control unit (such as PLC) of the sampling machine. The coal flow existence detection signal can be provided by an ultrasonic sensor, and the periodic sampling signal is generated by the system preset period parameter. The control unit receives and verifies the states of the three signals in real time, and sends the action instruction to the sampling head when all the conditions are met.

[0034] This step realizes multi-signal interlocking logic judgment, which not only ensures the time synchronization of the sampling action and the coal flow transmission relying on the sampling trigger time, but also avoids empty sampling and low-volume sampling through coal flow existence detection, and ensures that the sampling meets the preset rule with the help of the periodic sampling signal. The combination of the three greatly reduces the mis-sampling rate under the control of the traditional single condition. In addition, the interlocking judgment mechanism improves the rigor of sampling control, ensures that the sampled coal sample meets the time accuracy and meets the working condition effectiveness, further enhances the representativeness of the coal sample, and provides a reliable sample for subsequent coal quality analysis and trade settlement.

[0035] The belt sampling time point control method provided by the present disclosure acquires the profile information of the coal flow on the conveying belt in real time by a non-contact measurement method, dynamically determines the sampling trigger time in combination with the belt running speed, and performs interlocking logic judgment on the sampling trigger time, the coal flow existence detection signal and the periodic sampling signal. Therefore, the problems of low detection accuracy, inaccurate sampling trigger time and insufficient sampling representativeness caused by the use of contact type mechanical baffle detection, the reliance on fixed height threshold to determine the coal flow state and the inability to dynamically adapt to the change of the belt speed, and the lack of effective interlocking with the coal flow existence and periodic signal in the prior art can be solved. The technical effects of accurately grasping the real state of the coal flow, dynamically matching the belt running condition to determine the best sampling time, and performing sampling only when it is confirmed that there is coal flow and it meets the periodic sampling requirement are achieved, so as to improve the sampling accuracy, representativeness and reliability.

[0036] As a specific implementation of this disclosure, based on the basic scheme, the method of acquiring the contour information of the coal flow on the conveyor belt in real time through non-contact measurement is further defined as follows: setting a contour scanning sensor and a height limit baffle upstream of the sampling operation position; continuously collecting contour data of the upper surface of the coal flow through the contour scanning sensor, and generating a time series contour surface.

[0037] Specifically, a pre-defined installation area is determined upstream of the sampling location on the conveyor belt. This area maintains a fixed distance from the sampling location to allow for coal flow transmission time. Within this installation area, a height-limiting baffle is fixedly installed on the side closest to the coal flow direction. The distance between the bottom of the height-limiting baffle and the lowest point of the belt is set to a pre-defined height H (this height is less than the distance between the profile scanning sensor and the lowest point of the belt, and greater than the maximum expected thickness h of the coal flow under normal operating conditions). This baffle is used to block coal flows exceeding H in height and flatten them to H or below. Simultaneously, a profile scanning sensor is installed on the side of the height-limiting baffle away from the coal flow direction, with the sensor's detection direction perpendicular to the direction of the coal flow. At the coal conveying face of the conveyor belt, the sensor is equipped with a sealed shell and airflow guiding structure to isolate it from coal dust and airflow interference. The sensor continuously transmits detection signals at a preset frequency (such as multiple times per second) and receives the reflected signals from the upper surface of the coal flow. Each detection generates a contour curve of the upper surface of the coal flow along the width of the belt. Then, multiple contour curves are sequentially associated and spliced ​​according to the detection time (such as recording the time ti of each detection, i=0,1,2...) to form a time sequence contour surface that can reflect the morphological changes of the coal flow during transmission. This surface can intuitively present the dynamic characteristics of the coal flow in terms of thickness and width distribution at different times.

[0038] The height-limiting baffle effectively prevents excessively high coal flows from directly impacting the contour scanning sensor, protecting the sensor hardware from damage and preventing abnormal sensor detection signals caused by excessively high coal flows, thus ensuring detection stability. The time-series contour surface continuously acquired by the contour scanning sensor can capture the dynamic changes in the coal flow morphology more completely and continuously than discrete single contour data. This provides a more comprehensive basis for calculating the sampling trigger time in conjunction with belt speed, further reducing sampling judgment errors caused by instantaneous fluctuations in the coal flow morphology.

[0039] As a specific embodiment of this disclosure, based on the basic scheme, the contour scanning sensor is further defined as a laser line scanning sensor, which is installed at a height higher than the height limiting baffle, and the height limiting baffle is used to limit the maximum height of the coal flow to protect the sensor.

[0040] Specifically, a laser line scanning sensor is selected as the profile scanning sensor, which is installed on the side of the height-limiting baffle away from the coal flow on the upstream side of the sampling operation position, and the installation height relationship between the sensor and the height-limiting baffle is strictly controlled, that is, the vertical distance from the bottom of the laser line scanning sensor to the lowest point of the conveying belt is greater than the preset height H from the bottom of the height-limiting baffle to the lowest point of the belt. When the laser line scanning sensor works, it can emit a laser scanning line distributed along the width direction of the conveying belt, and the laser line can completely cover the width range of the coal conveying area of the belt. When the coal flow is conveyed through the sensor below the belt, the sensor receives the reflected laser signal on the surface of the coal flow, generates a single profile curve on the surface of the coal flow along the width direction of the belt through signal processing, and continuously collects multiple profile curves at a preset time interval (such as millisecond level). The height-limiting baffle is made of wear-resistant metal material, and its height H is set according to the maximum reasonable thickness of the coal flow under normal working conditions. When the height of the coal flow conveyed by the belt exceeds H, the height-limiting baffle will physically intercept and flatten the part of the coal flow that exceeds H, so that the height of the flattened coal flow is stable at H and below, avoiding direct contact or impact of the laser line scanning sensor by the over-high coal flow.

[0041] The laser line scanning sensor can capture the small changes in the surface of the coal flow in more detail and improve the collection accuracy of the profile data due to the high precision and fast response speed of laser measurement. The setting of "sensor installation height higher than height-limiting baffle" combined with the intercepting and flattening effect of the height-limiting baffle on the over-high coal flow not only avoids the impact damage of the over-high coal flow to the sensor from the physical level, prolongs the service life of the sensor, but also keeps the height of the coal flow entering the sensor detection area within a stable range, reduces the interference of the dramatic fluctuations of the coal flow to the laser signal, and further guarantees the stability and accuracy of the profile data collection.

[0042] As a specific implementation form of the present disclosure, based on the basic scheme, the dynamic determination of the sampling trigger time is further limited, including: judging whether the height of the coal flow reaches a preset threshold according to the profile information; when the height of the coal flow meets the condition, calculating the delay time of the sampling action according to the distance between the sensor and the sampling point and the belt speed.

[0043] Specifically, the coal flow profile information obtained in step 101 is subjected to data analysis, and the height values of each profile curve corresponding to the coal flow at each monitoring point in the width direction of the belt are extracted from the time series of the coal flow profile curved surface. These height values are compared with the preset coal flow height threshold value (the threshold value is set according to the height corresponding to the minimum coal amount required to ensure representative sampling). Only when the height values of the key monitoring points in the width direction of the coal flow in a profile curve all reach or exceed the preset threshold value, it is determined that the current coal flow height meets the sampling condition. Then, the fixed straight-line distance L between the installation position of the profile scanning sensor and the sampling operation point is obtained (the distance is measured in advance during equipment installation and recorded in the control system), and the current running speed V of the conveying belt is collected in real time through the belt speed measuring device (the speed data is transmitted to the control system in real time). The control system calculates the time required from the moment when the coal flow height meets the condition to the moment when it is transmitted to the sampling operation point according to the kinematic formula "delay time T = fixed distance L / belt running speed V". Finally, the collection time corresponding to the profile curve whose height meets the condition is added to the calculated delay time T, and the final sampling trigger time is determined.

[0044] Through the judgment condition of "coal flow height reaching the preset threshold value", the sampling opportunity with sufficient coal amount can be accurately selected, and the problem of small coal sample amount and poor representativeness caused by triggering sampling when the coal flow height is insufficient can be avoided. Based on the fixed distance and the real-time belt speed to calculate the delay time, the belt speed fluctuation can be dynamically adapted, the sampling action can be triggered when the coal flow is just transmitted to the sampling point, the problem of sampling time deviation caused by the fact that the traditional fixed time interval sampling cannot match the belt speed change is completely solved, and the accuracy of the sampling trigger time is improved.

[0045] As a specific implementation form of the present disclosure, on the basis of the basic scheme, the interlocking logic judgment further includes: generating a sampling instruction when the coal flow exists, the sampling period arrives, and the profile information meets the sampling condition are detected at the same time.

[0046] Specifically, the control system needs to monitor and verify the signals of three key conditions in real time: first, the coal flow existence signal is provided by the coal flow detection device (such as an ultrasonic sensor) deployed beside the conveying belt. The device transmits detection signals to the control system in real time. When the signal indicates that there is a coal flow on the belt that meets the preset thickness requirement, it is determined that the "coal flow existence" condition is met. Second, the sampling period arrival signal is generated by the period timing module preset in the control system. The module counts according to the pre-set sampling period (such as 100 seconds / time). When the counting value reaches the period threshold and the reset is completed, it is determined that the "sampling period arrival" condition is met. Third, the judgment of whether the profile information meets the sampling condition is based on the coal flow profile data obtained in step 101. The control system analyzes the real-time collected coal flow profile curve. If the parameters such as coal flow thickness and distribution uniformity reflected by the curve meet the pre-set sampling requirements (such as the coal flow thickness is not less than the critical height H), it is determined that the "profile information meets the sampling condition". Only when the control system receives valid signals that all the above three conditions are met, will it generate and send a sampling instruction to the sampling head. If the signal of any condition is not met or invalid, no sampling instruction will be generated, and the sampling head will remain in standby state.

[0047] The interlocking logic judgment verifies the three conditions of coal flow existence, sampling period, and profile qualification at the same time, effectively avoiding the problems of empty sampling (sampling without coal flow), non-periodic random sampling (sampling without period), and inferior sampling (sampling without qualified profile) caused by single condition triggering sampling. At the same time, it ensures that each sampling is carried out under the premise of actual existence of coal flow, compliance with periodical rules, and qualified form, significantly improving the effectiveness and accuracy of sampling action, and providing strict condition guarantee for subsequent acquisition of representative coal samples.

[0048] As a specific implementation form of the present disclosure, further limited on the basis scheme, further comprising: real-time monitoring of sensor working state, when detecting signal abnormality or response timeout, automatically triggering fault alarm and suspending sampling process.

[0049] Specifically, in order to guarantee the reliability of the coal flow contour information collection and the stability of the subsequent sampling process, the working state of the non-contact measurement sensor (such as a contour scanning sensor) used to obtain the coal flow contour information needs to be monitored in real time. The control system continuously receives the working state signals fed back by the sensor through a preset data interaction interface, including but not limited to the detection signal transmission integrity of the sensor (such as whether there is continuous data interruption), the data output format standardization (such as whether it conforms to the preset contour data protocol format), and the response time (such as the time interval from the sensor sending a detection instruction to returning contour data). The state judgment threshold is set: when no valid contour data of the sensor is received for a continuous preset time (for example, 5 seconds), the number of contour data format errors received exceeds the preset value (for example, 3 times), or the response time of the sensor exceeds the preset upper limit (for example, 200 milliseconds), it is determined that the sensor has signal abnormalities or response timeout problems. At this time, the control system immediately triggers a fault alarm mechanism, sends a pause instruction to the sampling control module through the connected sound and light alarm device to send a warning signal, and makes the sampling head stop any sampling action until the sensor fault is checked and eliminated (such as cleaning the sensor lens coal dust, checking the sensor power supply and signal line), and the sampling process can be restarted after the sensor returns to the normal working state.

[0050] By monitoring the working state of the sensor in real time, abnormal problems caused by coal dust shielding, line faults, etc. of the sensor can be found in time, and false sampling caused by the sensor failure to output error contour data is avoided; the fault alarm mechanism can quickly remind the staff to handle the fault, reducing the fault checking time; and pausing the sampling process prevents invalid sampling in the case of unreliable data, which not only guarantees the accuracy of coal sample collection, but also avoids the loss caused by the idling of the sampling equipment under abnormal working conditions.

[0051] It should be noted that the embodiments of the present disclosure can include a plurality of steps, which are numbered for the convenience of description, but these numbers do not limit the execution time slots and execution order between the steps; the steps can be implemented in any order, and the present disclosure does not limit this.

[0052] Corresponding to the above-mentioned belt sampling time point control method, the present disclosure also proposes a belt sampling time point control device. Since the device embodiment of the present disclosure corresponds to the above-mentioned method embodiment, for details not disclosed in the device embodiment, reference can be made to the above-mentioned method embodiment, which will not be described in detail in the present disclosure.

[0053] Figure 2 A structural schematic diagram of a belt sampling time point control device provided by an embodiment of the present disclosure is shown in FIG. 1, which includes: Figure 2 ​The acquisition unit 21 is configured to acquire profile information of the coal flow on the conveying belt in real time through a non-contact measurement manner. The determination unit 22 is configured to dynamically determine a sampling trigger time based on the profile information and the belt running speed. The control unit 23 is configured to control the sampling head to perform a sampling action according to the sampling trigger time, and perform interlocking logic judgment with the coal flow existence detection signal and the periodic sampling signal.

[0054] The belt sampling time point control device provided by the present disclosure can acquire the profile information of the coal flow on the conveying belt in real time through a non-contact measurement manner, dynamically determine the sampling trigger time in combination with the belt running speed, and perform interlocking logic judgment with the coal flow existence detection signal and the periodic sampling signal. Therefore, the problems of low detection accuracy, inaccurate sampling trigger time and insufficient sampling representativeness caused by the contact type mechanical baffle detection, the fixed height threshold determination of the coal flow state and the inability to dynamically adapt to the belt speed changes, and the lack of effective interlocking with the coal flow existence and periodic signal in the prior art can be solved. The technical effects of accurately grasping the real state of the coal flow, dynamically matching the belt running condition to determine the best sampling time, and performing sampling only when the coal flow is confirmed and the periodic sampling requirement is met can be achieved, so as to improve the sampling accuracy, representativeness and reliability.

[0055] Further, in one possible implementation manner of the present embodiment, the acquisition unit 21 is further configured to: set a profile scanning sensor and a height limiting baffle upstream of the sampling operation position; continuously collect profile data of the upper surface of the coal flow through the profile scanning sensor, and generate a time sequence of profile curved surfaces.

[0056] Further, in one possible implementation manner of the present embodiment, the profile scanning sensor is a laser line scanning sensor, the installation height of which is higher than that of the height limiting baffle, and the height limiting baffle is used to limit the maximum height of the coal flow to protect the sensor.

[0057] Further, in one possible implementation manner of the present embodiment, the determination unit 22 is further configured to: determine whether the height of the coal flow reaches a preset threshold according to the profile information; when the height of the coal flow meets the condition, calculate the delay time of the sampling action according to the distance between the sensor and the sampling point and the belt speed.

[0058] Further, in one possible implementation manner of the present embodiment, the interlocking logic judgment includes: generate a sampling instruction when the coal flow existence, the sampling period arrival and the profile information meeting the sampling condition are detected at the same time.

[0059] Further, in a possible implementation manner of the embodiment, as shown in Figure 2 Further, in a possible implementation manner of the embodiment, as shown in The monitoring unit 24 is configured to monitor the working state of the sensor in real time, and when detecting signal abnormality or response timeout, automatically trigger fault alarm and suspend the sampling process.

[0060] It should be noted that the foregoing description of the method embodiment is also applicable to the device of the present embodiment, and the principle is the same, which will not be limited in the present embodiment.

[0061] According to the embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0062] Figure 3 A schematic block diagram of an example electronic device 300 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smartphones, wearable devices, and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit the implementations of the present disclosure described and / or claimed in this document.

[0063] As shown in Figure 3 The electronic device 300 includes a computing unit 301 that can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 302 or a computer program loaded into a RAM (Random Access Memory) 303 from a storage unit 308. Various programs and data required for the operation of the electronic device 300 can also be stored in the RAM 303. The computing unit 301, the ROM 302, and the RAM 303 are connected to each other through a bus 304. An I / O (Input / Output) interface 305 is also connected to the bus 304.

[0064] Various components in the electronic device 300 are connected to the I / O interface 305, including an input unit 306 such as a keyboard, a mouse, etc., an output unit 307 such as various types of displays, a speaker, etc., a storage unit 308 such as a magnetic disk, an optical disk, etc., and a communication unit 309 such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 309 allows the electronic device 300 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0065] The computing unit 301 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the computing unit 301 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), various special-purpose AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, a DSP (Digital Signal Processor), and any appropriate processor, controller, microcontroller, etc. The computing unit 301 performs various methods and processes described above, such as the belt sampling time point control method. For example, in some embodiments, the belt sampling time point control method can be implemented as a computer software program, which is tangibly embodied in a machine-readable medium, such as the storage unit 308. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 300 via the ROM 302 and / or the communication unit 309. When the computer program is loaded onto the RAM 303 and executed by the computing unit 301, one or more steps of the methods described above can be performed. Alternatively, in other embodiments, the computing unit 301 can be configured to perform the aforementioned belt sampling time point control method by other any appropriate means, such as by means of firmware.

[0066] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a Field Programmable Gate Array (FPGA), an Application-Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a System on a Chip (SOC), a Complex Programmable Logic Device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0067] Program code for carrying out methods of the present disclosure can be written in any combination of one or more programming languages. This program code can be provided to a processor or controller of a general or special purpose computer, such that the program code, when executed by the processor or controller, causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code can execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0068] In the context of this disclosure, a machine-readable medium can be a tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, RAM, ROM, EPROM (Electrically Programmable Read-Only-Memory), or flash memory, an optical fiber, a CD-ROM (Compact Disc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0069] To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having a display device (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0070] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a LAN (Local Area Network), a WAN (Wide Area Network), the Internet, and a blockchain network.

[0071] The computer system can include clients and servers. This relationship can be between a client and a server that are typically distant from each other and typically interact through a communication network. The relationship between the client and the server is generated by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, and solves the defects of large management difficulty and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or simply "VPS"). The server can also be a server of a distributed system, or a server combined with a blockchain.

[0072] It should be noted that artificial intelligence is a discipline that studies enabling computers to simulate some thinking processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.) of people, and has both hardware and software technologies. Artificial intelligence hardware technology generally includes technologies such as sensors, special artificial intelligence chips, cloud computing, distributed storage, big data processing, etc.; artificial intelligence software technology mainly includes computer vision technology, speech recognition technology, natural language processing technology, and machine learning / deep learning, big data processing technology, knowledge graph technology, etc. several major directions.

[0073] The first, second, and the like various numerical numbers involved in the present disclosure are only for the convenience of differentiation in the description, and do not limit the scope of the embodiments of the present disclosure, nor represent the order of precedence.

[0074] At least one of the present disclosure can also be described as one or more, and the plurality can be two, three, four or more, which is not limited by the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D". The technical features described by "first", "second", "third", "A", "B", "C" and "D" have no order or size order.

[0075] It should be understood that the steps shown above can be reordered, added or deleted. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, which is not limited herein.

[0076] The above detailed description does not limit the scope of the disclosure. Various modifications, combinations, sub-combinations and alternatives can be made to the detailed description. Any modification, equivalent replacement and improvement etc. made within the spirit and principle of the disclosure shall be included in the scope of the disclosure.

Claims

1. A method for controlling the sampling time point of a belt conveyor, characterized in that, include: The contour information of the coal flow on the conveyor belt is obtained in real time through non-contact measurement. Based on the contour information and belt running speed, the sampling trigger time is dynamically determined; The sampling head is controlled to perform sampling actions according to the sampling trigger time, and interlocking logic is performed with the coal flow existence detection signal and the periodic sampling signal.

2. The method according to claim 1, characterized in that, The real-time acquisition of the contour information of the coal flow on the conveyor belt through a non-contact measurement method includes: A contour scanning sensor and a height-limiting baffle are installed upstream of the sampling location; The contour scanning sensor continuously acquires contour data of the upper surface of the coal flow and generates a time-series contour surface.

3. The method according to claim 2, characterized in that, The contour scanning sensor is a laser line scanning sensor, which is installed at a height higher than the height limiting baffle, and the height limiting baffle is used to limit the maximum height of the coal flow to protect the sensor.

4. The method according to claim 1, characterized in that, The dynamic determination of the sampling trigger time includes: Determine whether the coal flow height has reached the preset threshold based on the contour information; When the coal flow height meets the conditions, the delay time of the sampling action is calculated based on the distance between the sensor and the sampling point and the belt speed.

5. The method according to claim 1, characterized in that, The interlocking logic judgment includes: A sampling command is generated when coal flow is detected simultaneously, the sampling period is reached, and the contour information meets the sampling conditions.

6. The method according to claim 1, characterized in that, Also includes: The sensor's operating status is monitored in real time. When an abnormal signal or response timeout is detected, a fault alarm is automatically triggered and the sampling process is suspended.

7. A belt sampling time point control device, characterized in that, include: The acquisition unit is used to acquire the contour information of the coal flow on the conveyor belt in real time through non-contact measurement. The determining unit is used to dynamically determine the sampling trigger time based on the contour information and the belt running speed; The control unit is used to control the sampling head to perform sampling actions according to the sampling trigger time, and to perform interlocking logic judgment with the coal flow existence detection signal and the periodic sampling signal.

8. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-6.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method according to any one of claims 1-6.

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