Non-contact wide-range belt conveyor coal conveying monitoring method and device for coal mine

Abstract

The invention relates to a non-contact wide-range belt conveyor coal conveying monitoring method and device for a coal mine, and belongs to the technical field of coal mine conveying equipment. The method comprises the following steps: firstly, setting an initial distance H, and continuously updating the initial distance H according to a farthest distance base value comparison method; and judging the transportation state of the current transportation belt by combining the activation state or the inhibition state of the transportation belt, the fluctuation range of the actual distance h and the inhibition state, the high fluctuation threshold value, the fluctuation range of the actual distance h and the activation state and the low fluctuation threshold value, and continuously monitoring. According to the method, the effective detection distance is increased by adopting a farthest distance base value comparison method, false alarms are reduced by setting an inhibition state and an activation state and introducing a sudden change detection mechanism, the self-diagnosis and self-recovery functions are achieved, the maintenance cost is reduced, and the anti-interference capability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine transportation equipment, and relates to a non-contact wide-range belt conveyor coal transportation monitoring method and device for coal mines. Background Art

[0002] Belt conveyors for coal mines are key equipment in coal mine production and are responsible for the continuous transportation of coal. However, in the coal mine production process, the coal transportation status monitoring of belt conveyors has always been a difficult problem. Traditional coal transportation status monitoring methods mostly use contact sensors, such as chain touch sensors. Due to the harsh underground environment of coal mines, contact sensors are easily affected by factors such as coal dust and water mist, resulting in reduced measurement accuracy and even damage to the sensor. The existing non-contact coal transportation monitoring sensors generally have an effective monitoring distance of no more than one meter, which is not applicable in some coal mine tunnels. There are problems such as low measurement accuracy, poor reliability, and high maintenance costs.

[0003] In recent years, with the continuous development of laser ranging technology, the application of non-contact laser ranging technology in coal mine conveyor coal transportation status monitoring has gradually attracted attention. Non-contact laser ranging technology has the advantages of high measurement accuracy, fast response speed, and no environmental interference. It can realize real-time monitoring of the coal transportation status of belt conveyors, improve monitoring accuracy and efficiency, reduce equipment wear, reduce energy consumption, and improve the safety and reliability of coal mine transportation systems.

[0004] However, existing non-contact laser technology still has the following defects:

[0005] (1) The existing non-contact laser technology coal transportation monitoring sensor has a short effective monitoring distance, which is only effective within one meter. It requires manual setting of parameters and is complicated to use. This is because the monitored object is a coal block with a low reflectivity, so the laser principle distance measurement detection accuracy is low.

[0006] (2) Existing non-contact laser technology coal transport monitoring sensors have weak anti-interference capabilities and are prone to false alarms. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a non-contact wide-range belt conveyor coal transportation monitoring method and device for coal mines. The method and device use non-contact laser ranging technology to achieve rapid real-time monitoring of the coal transportation status of the belt conveyor, so as to assist the spray control equipment in performing precise spray dust reduction, improve accuracy and efficiency, reduce energy consumption, and enhance the safety and reliability of the coal mine transportation system.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A non-contact wide-range belt conveyor coal transportation monitoring method for a coal mine, the method comprising the following steps:

[0010] S1. Initialize the initial distance, define a set of expected values ​​of several distance measurement data as the initial distance H, and store it;

[0011] S2, obtaining a set of distance data containing several distance measurements again, and defining its expected value as the actual distance h;

[0012] S3. Compare the actual distance h with the initial distance H according to the farthest distance base value comparison method. If the actual distance h is less than the initial distance H, proceed to the next step; if the actual distance h is greater than or equal to the initial distance H, update the initial distance H to the actual distance h, and return to step S2.

[0013] S4, judging whether the conveyor belt is currently in an activated state or an inhibited state according to the state signal, if it is in an activated state, proceeding to step S5; if it is in an inhibited state, proceeding to step S6;

[0014] S5, judging the current transport state of the conveyor belt according to the actual distance h, the suppression state fluctuation range and the high fluctuation threshold, and returning to step S2 for continuous monitoring;

[0015] S6. Determine the current transport state of the conveyor belt according to the actual distance h, the activation state fluctuation range and the low fluctuation threshold, and return to step S2 for continuous monitoring.

[0016] Furthermore, in step S4, two states of the conveyor belt are defined, namely, an activated state and an inhibited state. In the initial state, the conveyor belt is in an inhibited state. In the subsequent recognition process, the inhibited state and the activated state are transformed according to the corresponding feedback signal.

[0017] Further, in step S5, the suppression state fluctuation range is first defined, wherein the suppression state fluctuation range is:

[0018] (-∞,H-a1)∪(H+a2,∞)

[0019] Among them, H is the initial distance, a1 and a2 are the thresholds for belt vibration, which are determined according to the mean difference and variance of samples in the state of no coal transportation on the conveyor belt, respectively;

[0020]

[0021]

[0022] Where n is the number of samples collected per unit time, and m is the number of samples. The number of samples, x i is the i-th value after the samples are sorted from small to large, is the sample mean.

[0023] Define high fluctuation H_Wave and high fluctuation threshold b2, where the initial value of high fluctuation H_Wave is 0, and the high fluctuation threshold b2 is determined as follows:

[0024]

[0025] Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the sample mean.

[0026] Further, then, in step S5, the judgment is made according to the following logic:

[0027] S51, whether the current actual distance h belongs to the suppression state fluctuation range, if so, proceed to step S52, otherwise output the current state of the conveyor belt as non-coal transport state, reset the high fluctuation H_Wave=0, and return to step S2 for continuous monitoring;

[0028] S52, high fluctuation H_Wave is superimposed and updated, the specific method is:

[0029] H_Wave=H_Wave+1

[0030] S53. Compare the relationship between the high fluctuation H_Wave and the high fluctuation threshold b2. If H_Wave ≥ b2, then output the current state of the conveyor belt as the coal transport state, send a signal to change to the activation state, reset H_Wave = 0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the non-coal transport state, and return to S2 for continuous monitoring.

[0031] Further, in step S6, the activation state fluctuation range is first defined, wherein the activation state fluctuation range is expressed as:

[0032] (H-a1,H+a2)

[0033] Among them, H is the initial distance, a1 and a2 are the thresholds for belt vibration; its decibel is determined according to the mean difference and variance of the samples in the state of no coal transportation on the conveyor belt;

[0034] Define low fluctuation L_Wave and low fluctuation threshold b1, where the initial value of low fluctuation L_Wave is 0, and the low fluctuation threshold b1 is determined as follows:

[0035]

[0036] Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the mean of the samples, and B is the fluctuation threshold difference.

[0037] Further, then, in step S6, the judgment is made according to the following logic:

[0038] S61, whether the current actual distance h belongs to the activated state fluctuation range, if so, proceed to step S62, otherwise output the current state of the conveyor belt as the coal transport state, reset the high fluctuation L_Wave=0, and return to step S2 for continuous monitoring;

[0039] S52, low fluctuation L_Wave is superimposed and updated, the specific method is:

[0040] L_Wave=L_Wave+1

[0041] S53. Compare the relationship between the low fluctuation H_Wave and the low fluctuation threshold b2. If L_Wave≥b1, output the current state of the conveyor belt as the non-coal transport state, send a signal to change to the inhibition state, reset L_Wave=0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the coal transport state, and return to S2 for continuous monitoring.

[0042] The present invention also provides a non-contact wide-range belt conveyor coal transport monitoring device for coal mines, which at least includes: a sensor, a processor, a memory, a display unit, a data communication unit, a remote control unit, and a power module, wherein:

[0043] The sensor is installed directly above the conveyor belt. The sensor periodically measures the distance between it and the conveyor belt or coal seam in a non-contact manner through laser ranging technology, and transmits the ranging data to the processor for processing. The memory is used to store the ranging data and monitoring results, and the display unit is used to display the monitoring results.

[0044] The processor is used to execute the aforementioned non-contact wide-range belt conveyor coal transportation monitoring method for coal mines;

[0045] The data communication unit is used to communicate with external equipment and cooperate with external dust reduction devices to achieve dust reduction during coal transportation; the remote control unit is used for remote equipment debugging and remote control, including remote modification of equipment parameters and equipment status control; the power supply module is used to convert the external power supply voltage into the equipment power supply voltage.

[0046] The beneficial effects of the present invention are:

[0047] The present invention increases the effective detection distance to a maximum of 3 meters by adopting the method of comparing the farthest distance base values, has low accuracy requirements and does not require manual setting of any parameters, and is easy to use.

[0048] The present invention reduces the generation of false alarms by setting an inhibition state and an activation state and introducing a mutation detection mechanism, and has the functions of self-diagnosis and self-recovery, thereby reducing maintenance costs and improving anti-interference capabilities.

[0049] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0051] Figure 1 It is an overall flow chart of a non-contact wide-range belt conveyor coal transportation monitoring method for coal mines of the present invention;

[0052] Figure 2 It is a simplified structural schematic diagram of a non-contact wide-range belt conveyor coal transportation monitoring device for coal mines of the present invention. DETAILED DESCRIPTION

[0053] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0054] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0055] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0056] See also Figure 1-2 , which is a non-contact wide-range belt conveyor coal transportation monitoring method and device for coal mines.

[0057] Example

[0058] The present embodiment provides a specific implementation method of a non-contact wide-range belt conveyor coal transportation monitoring method and device for coal mines. The method and device use non-contact laser ranging technology to achieve rapid real-time monitoring of the coal transportation status of the belt conveyor, so as to assist the spray control equipment in performing precise spray dust reduction, improve accuracy and efficiency, reduce energy consumption, and enhance the safety and reliability of the coal mine transportation system.

[0059] like Figure 1 As shown, a non-contact wide-range belt conveyor coal transportation monitoring method for coal mines of the present invention at least comprises the following steps:

[0060] S1. Initialize the initial distance, define a set of expected values ​​of several distance measurement data as the initial distance H, and store it;

[0061] S2, obtaining a set of distance data containing several distance measurements again, and defining its expected value as the actual distance h;

[0062] S3. Compare the actual distance h with the initial distance H according to the farthest distance base value comparison method. If the actual distance h is less than the initial distance H, proceed to the next step; if the actual distance h is greater than or equal to the initial distance H, update the initial distance H to the actual distance h, and return to step S2.

[0063] S4, judging whether the conveyor belt is currently in an activated state or an inhibited state according to the state signal, if it is in an activated state, proceeding to step S5; if it is in an inhibited state, proceeding to step S6;

[0064] S5, judging the current transport state of the conveyor belt according to the actual distance h, the suppression state fluctuation range and the high fluctuation threshold, and returning to step S2 for continuous monitoring;

[0065] S6. Determine the current transport state of the conveyor belt according to the actual distance h, the activation state fluctuation range and the low fluctuation threshold, and return to step S2 for continuous monitoring.

[0066] Step S3 is actually to perform anti-mutation detection. Anti-mutation detection: Based on the farthest base value comparison, the autocorrelation coefficient of a set of data is calculated. If it is less than the threshold value of 0.01, the current state of the belt conveyor is determined to be stopped. At this time, regardless of the size of the actual distance h and the initial distance H, the initial distance H is updated to the actual distance h. This is to deal with misjudgments caused by human interference or equipment failure.

[0067] In step S4, the present invention defines two states of the conveyor belt, an activated state and an inhibited state, to prevent false alarms caused by sudden changes in the distance between front and rear monitoring. In the initial state, the conveyor belt is in an inhibited state; in the subsequent recognition process, the inhibited state and the activated state will be transformed according to the corresponding feedback signal.

[0068] In step S5, the suppression state fluctuation range is first defined, wherein the suppression state fluctuation range is:

[0069] (-∞,H-a1)∪(H+a2,∞)

[0070] Among them, H is the initial distance, a1 and a2 are the thresholds for belt vibration, which are determined according to the mean difference and variance of samples in the state of no coal transportation on the conveyor belt, respectively;

[0071]

[0072]

[0073] Where n is the number of samples collected per unit time, and m is the number of samples. The number of samples, x i is the i-th value after the samples are sorted from small to large, is the mean of the samples. In this embodiment, a1 and a2 are set to 3.655 and 3.106.

[0074] And define the high fluctuation H_Wave and the high fluctuation threshold b2, where the initial value of the high fluctuation H_Wave is 0, and the high fluctuation threshold b2 is determined as follows:

[0075]

[0076] Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the mean of the samples. In this embodiment, the high fluctuation threshold b2 is set to 2.21.

[0077] Then, in step S5, the judgment is made according to the following logic:

[0078] S51, whether the current actual distance h belongs to the suppression state fluctuation range, if so, proceed to step S52, otherwise output the current state of the conveyor belt as non-coal transport state, reset the high fluctuation H_Wave=0, and return to step S2 for continuous monitoring;

[0079] S52, high fluctuation H_Wave is superimposed and updated, the specific method is:

[0080] H_Wave=H_Wave+1

[0081] S53. Compare the relationship between the high fluctuation H_Wave and the high fluctuation threshold b2. If H_Wave ≥ b2, then output the current state of the conveyor belt as the coal transport state, send a signal to change to the activation state, reset H_Wave = 0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the non-coal transport state, and return to S2 for continuous monitoring.

[0082] In step S6, the activation state fluctuation range is first defined, wherein the activation state fluctuation range is expressed as:

[0083] (H-a1,H+a2)

[0084] The low fluctuation L_Wave and the low fluctuation threshold b1 are defined, wherein the initial value of the low fluctuation L_Wave is 0, and the low fluctuation threshold b1 is determined as follows:

[0085]

[0086] Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the mean of the samples, and B is the fluctuation threshold difference. In this embodiment, the fluctuation threshold difference is set to 3, and the low fluctuation threshold b1 is 5.21.

[0087] Then, in step S6, the judgment is made according to the following logic:

[0088] S61, whether the current actual distance h belongs to the activated state fluctuation range, if so, proceed to step S62, otherwise output the current state of the conveyor belt as the coal transport state, reset the high fluctuation L_Wave=0, and return to step S2 for continuous monitoring;

[0089] S52, low fluctuation L_Wave is superimposed and updated, the specific method is:

[0090] L_Wave=L_Wave+1

[0091] S53. Compare the relationship between the low fluctuation H_Wave and the low fluctuation threshold b2. If L_Wave≥b1, output the current state of the conveyor belt as the non-coal transport state, send a signal to change to the inhibition state, reset L_Wave=0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the coal transport state, and return to S2 for continuous monitoring.

[0092] This embodiment also provides a non-contact wide-range belt conveyor coal transportation monitoring device for coal mines, such as Figure 2 As shown, it at least includes: a sensor, a processor, a memory, a display unit, a data communication unit, a remote control unit, and a power module, wherein the sensor is installed directly above the conveyor belt, the sensor monitoring direction is perpendicular to the conveyor belt, the sensor periodically measures the distance between it and the conveyor belt or the coal seam in a non-contact manner through laser ranging technology, and transmits the ranging data to the processor for processing, the processor is used to execute the aforementioned non-contact wide-range belt conveyor coal transportation monitoring method for coal mines; the data communication unit is used to communicate with external equipment, such as cooperating with an external dust reduction device to achieve coal transportation dust reduction; the remote control unit is used for remote equipment debugging and remote control, and can be mainly used for remote equipment parameter modification and equipment status control; the power module is mainly used to convert the external power supply voltage into the equipment power supply voltage, the memory is used to store the ranging data and monitoring results, and the display unit is used to display the monitoring results. In this embodiment, the processor, memory, display unit, data communication unit, remote control unit, and power module are integrated into a single-chip form, which is convenient for installation and practical application.

[0093] Laser ranging has low accuracy due to its application scenarios in mines and the nature of the objects being measured. Therefore, the effective distance of coal transport monitoring devices based on the laser ranging principle is generally within 1 meter. The detection method of the present invention extends the effective distance to a maximum of 3 meters under the original accuracy of the sensor, covering the application needs of the vast majority of coal mine tunnels, and has strong anti-interference ability and self-recovery at the algorithm level, thereby improving reliability.

[0094] Monitoring data example: The following samples are obtained:

[0095] Sample H1

[20] = [199.99, 199.91, 200.02, 200.20, 199.85, 200.32, 200.17, 200.32, 200.25, 200.06,

[0096] 200.11,200.15,199.81,200.21,200.53,200.33,200.35,199.83,199.82,199.65]

[0097] Sample H2

[20] = [200.35, 200.96, 200.85, 198.34, 201.55, 201.79, 198.81, 198.79, 200.85, 200.56,

[0098] 200.32,201.11,199.95,201.25,198.27,199.93,200.32,201.09,199.42,201.25]

[0099] Sample H3

[20] = [191.13, 186.65, 195.79, 187.86, 198.11, 193.85, 185.21, 185.66, 193.55, 197.16,

[0100] 189.85,192.43,188.71,193.23,190.92,191.87,190.33,185.52,185.31,195.01]

[0101] The above sample data are the actual sensor output values ​​(expected values ​​have been taken) in centimeters, where H1

[20] is a stopped state sample, H2

[20] is a non-coal transport state (idling state) sample, and H3

[20] is a coal transport state sample.

[0102] Under normal circumstances, the sensor is started from a stopped state, and the belt distance H is obtained as 200.53. The belt vibration limit thresholds a1 and a2 are obtained by measuring the state without coal transportation (idling state). According to the current sample data, a1=3.655, a2=3.106 are measured. b1 and b2 are obtained by measuring the state with coal. According to the current data, b1=5.21, b2=2.21 are measured.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A non-contact wide-range belt conveyor coal transportation monitoring method for coal mines, characterized in that: The method comprises the following steps: S1. Initialize the initial distance, define a set of expected values ​​of several distance measurement data as the initial distance H, and store it; S2, obtaining a set of distance data containing several distance measurements again, and defining its expected value as the actual distance h; S3. Compare the actual distance h with the initial distance H according to the farthest distance base value comparison method. If the actual distance h is less than the initial distance H, proceed to the next step; if the actual distance h is greater than or equal to the initial distance H, update the initial distance H to the actual distance h, and return to step S2. S4, judging whether the conveyor belt is currently in an activated state or an inhibited state according to the state signal, if it is in an activated state, proceeding to step S5; if it is in an inhibited state, proceeding to step S6; S5, judging the current transport state of the conveyor belt according to the actual distance h, the suppression state fluctuation range and the high fluctuation threshold, and returning to step S2 for continuous monitoring; S6. Determine the current transport state of the conveyor belt according to the actual distance h, the activation state fluctuation range and the low fluctuation threshold, and return to step S2 for continuous monitoring.

2. A non-contact wide-range belt conveyor coal transportation monitoring method for coal mines according to claim 1, characterized in that: In step S4, two states of the conveyor belt are defined, namely, an activated state and an inhibited state. In the initial state, the conveyor belt is in an inhibited state. In the subsequent recognition process, the inhibited state and the activated state are transformed according to the corresponding feedback signal.

3. The method for monitoring coal transportation by a non-contact wide-range belt conveyor for coal mines according to claim 1 is characterized in that: In step S5, the suppression state fluctuation range is first defined, wherein the suppression state fluctuation range is: (-∞,H-a1)∪(H+a2,∞) Among them, H is the initial distance, a1 and a2 are the thresholds for belt vibration, which are determined according to the mean difference and variance of samples in the state of no coal transportation on the conveyor belt, respectively; Where n is the number of samples collected per unit time, and m is the number of samples. The number of samples, x i is the i-th value after the samples are sorted from small to large, is the sample mean. Define high fluctuation H_Wave and high fluctuation threshold b2, where the initial value of high fluctuation H_Wave is 0, and the high fluctuation threshold b2 is determined as follows: Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the sample mean.

4. A non-contact wide-range belt conveyor coal transportation monitoring method for coal mines according to claim 3, characterized in that: Then, in step S5, the judgment is made according to the following logic: S51, whether the current actual distance h belongs to the suppression state fluctuation range, if so, proceed to step S52, otherwise output the current state of the conveyor belt as non-coal transport state, reset the high fluctuation H_Wave=0, and return to step S2 for continuous monitoring; S52, high fluctuation H_Wave is superimposed and updated, the specific method is: H_Wave=H_Wave+1 S53. Compare the relationship between the high fluctuation H_Wave and the high fluctuation threshold b2. If H_Wave ≥ b2, then output the current state of the conveyor belt as the coal transport state, send a signal to change to the activation state, reset H_Wave = 0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the non-coal transport state, and return to S2 for continuous monitoring.

5. The method for monitoring coal transportation by a non-contact wide-range belt conveyor for coal mines according to claim 1 is characterized in that: In step S6, the activation state fluctuation range is first defined, wherein the activation state fluctuation range is expressed as: (H-a1,H+a2) Among them, H is the initial distance, a1 and a2 are the thresholds for belt vibration; its decibel is determined according to the mean difference and variance of the samples in the state of no coal transportation on the conveyor belt; Define low fluctuation L_Wave and low fluctuation threshold b1, where the initial value of low fluctuation L_Wave is 0, and the low fluctuation threshold b1 is determined as follows: Where n is the number of samples collected per unit time, x i is the i-th value of the sample, is the mean of the samples, and B is the fluctuation threshold difference.

6. A non-contact wide-range belt conveyor coal transportation monitoring method for coal mines according to claim 5, characterized in that: Then, in step S6, the judgment is made according to the following logic: S61, whether the current actual distance h belongs to the activated state fluctuation range, if so, proceed to step S62, otherwise output the current state of the conveyor belt as the coal transport state, reset the high fluctuation L_Wave=0, and return to step S2 for continuous monitoring; S52, low fluctuation L_Wave is superimposed and updated, the specific method is: L_Wave=L_Wave+1 S53. Compare the relationship between the low fluctuation H_Wave and the low fluctuation threshold b2. If L_Wave≥b1, output the current state of the conveyor belt as the non-coal transport state, send a signal to change to the inhibition state, reset L_Wave=0, and return to S2 for continuous monitoring; otherwise, only output the current state of the conveyor belt as the coal transport state, and return to S2 for continuous monitoring.

7. A non-contact wide-range belt conveyor coal transportation monitoring device for coal mines, characterized in that: It at least includes: a sensor, a processor, a memory, a display unit, a data communication unit, a remote control unit, and a power module, wherein: The sensor is installed directly above the conveyor belt. The sensor periodically measures the distance between it and the conveyor belt or coal seam in a non-contact manner through laser ranging technology, and transmits the ranging data to the processor for processing. The memory is used to store the ranging data and monitoring results, and the display unit is used to display the monitoring results. The processor is used to execute the non-contact wide-range belt conveyor coal transportation monitoring method for coal mines as described in any one of claims 1 to 6; The data communication unit is used to communicate with external equipment and cooperate with external dust reduction devices to achieve dust reduction during coal transportation; the remote control unit is used for remote equipment debugging and remote control, including remote modification of equipment parameters and equipment status control; the power supply module is used to convert the external power supply voltage into the equipment power supply voltage.

Images