CN211978320U - Belt state monitoring device of self-powered belt conveyor - Google Patents
Belt state monitoring device of self-powered belt conveyor Download PDFInfo
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- CN211978320U CN211978320U CN202020860727.8U CN202020860727U CN211978320U CN 211978320 U CN211978320 U CN 211978320U CN 202020860727 U CN202020860727 U CN 202020860727U CN 211978320 U CN211978320 U CN 211978320U
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Abstract
The utility model relates to a self-energized band conveyer's belt condition monitoring devices, include: the impact power generation sensor, the rotary power generation sensor and the weighing sensor are arranged on the buffer carrier roller; the impact power generation sensor, the rotary power generation sensor and the weighing sensor are electrically connected with the signal acquisition and processing unit, the signal acquisition and processing unit is electrically connected with the central processing unit, and the central processing unit is electrically connected with the database and the interaction unit; the impact power generation sensor and the rotation power generation sensor are electrically connected with the confluence power supply unit. The utility model discloses utilize the blanking to strike and the rotation of belt bearing roller forms one set and can generate information and can produce the device of electric energy again, accomplishes two functions of area face state detection and material flow detection. Under the condition of belt load, the material flow volume is detected in real time, the material flow information is collected in real time, and the belt surface video of the belt is collected in real time under the condition of no load of the belt for monitoring. The power supply of the device utilizes the electric energy generated by the sensor, so that the installation and the use are more flexible.
Description
Technical Field
The utility model relates to a self-power band conveyer's belt state monitoring devices is an on-line measuring equipment, is a safety inspection equipment that is used for detecting band conveyer's belt quality in order to guarantee safety in production.
Background
The belt conveyor is one of throat devices for underground coal conveying, the quality of the belt surface state (such as bulging, tearing and breakage) of the belt conveyor is related to the safe and reliable operation of a belt, and the energy consumption of the belt conveyor is directly influenced by the change of the belt surface coal flow. The existing belt surface state detection mode adopts no-load and load separated detection, namely, the belt surface state is detected when no-load is detected by independent shutdown, two sets of systems are required to be installed to finish the change of coal flow under the load state, the systems are required to be supplied with power independently, the installation and the use are very inconvenient, and the application scene field use effect is not good.
Disclosure of Invention
In order to overcome prior art's problem, the utility model provides a from energy supply band conveyer's belt state monitoring devices, the device through at belt feeder installation electricity generation sensor, can enough perceive the motion state of belt, the quality of real-time supervision belt can generate electricity again and supply with instrument itself and use, has improved the security of belt feeder.
The purpose of the utility model is realized like this: a belt condition monitoring device of a self-powered belt conveyor, comprising: the impact power generation sensors are arranged on a plurality of buffer carrier rollers of a receiving section of the belt conveyor, and at least two conventional carrier rollers of the belt conveyor are provided with a rotary power generation sensor and a weighing sensor; the impact power generation sensor, the rotary power generation sensor and the weighing sensor are electrically connected with the signal acquisition and processing unit, the signal acquisition and processing unit is electrically connected with the central processing unit, and the central processing unit is electrically connected with the database and the interaction unit; the impact power generation sensor and the rotation power generation sensor are electrically connected with the confluence power supply unit.
Furthermore, the signal acquisition and processing unit is also electrically connected with the binocular video sensor and the laser radar sensor.
Further, the impulse power generation sensor includes: the belt conveyor comprises a stator fixedly mounted on a belt rack and a rotor capable of moving up and down together with a buffer carrier roller.
Further, the stator is an electromagnetic coil winding, and the mover is a permanent magnet.
Further, the impact power generation sensor is a piezoelectric sheet.
Further, the rotary power generation sensor is a generator.
Furthermore, the confluence power supply unit is provided with a storage battery.
The utility model has the advantages and beneficial effects that: the utility model discloses utilize the blanking to strike and the rotation of belt bearing roller forms one set and can generate information and can produce the device of electric energy again, accomplishes two functions of area face state detection and material flow detection. Under the condition of belt load, the material flow volume is detected in real time, the material flow is converted by combining the belt speed and the material bulk density, the real-time acquisition of material flow information is realized, the belt surface video of the belt is acquired in real time under the condition of no-load of the belt, and the alarm can be timely given and the machine can be stopped and overhauled when the defects of belt surface damage, tearing, bulging and the like occur. The power supply of the device utilizes the electric energy generated by the sensor, an external power supply is not needed, the energy is saved, and the installation and the use are more flexible and convenient.
Drawings
FIG. 1 is a schematic structural view of a belt conveyor with a first device and a second device according to an embodiment of the present invention;
fig. 2 is a system block diagram of an apparatus according to an embodiment of the present invention;
fig. 3 is a system block diagram of an apparatus according to the second embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
the embodiment is a belt state monitoring device of a self-powered belt conveyor, as shown in fig. 1 and 2, wherein fig. 1 is a schematic view of the monitoring device mounted on a belt conveyor, and fig. 2 is a schematic structural block diagram. The embodiment comprises the following steps: the impact power generation sensor 2 is arranged on a plurality of buffer carrier rollers 1 of a material receiving section of the belt conveyor, and at least two conventional carrier rollers 3 of the belt conveyor are provided with a rotary power generation sensor 4 and a weighing sensor 5; the impact power generation sensor, the rotary power generation sensor and the weighing sensor are electrically connected with the signal acquisition and processing unit, the signal acquisition and processing unit is electrically connected with the central processing unit, and the central processing unit is electrically connected with the database and the interaction unit; the impact power generation sensor and the rotation power generation sensor are electrically connected with the confluence power supply unit.
The main thinking of this embodiment is through the monitoring of the cushion roller that receives the blanking and the rotatory monitoring to conventional bearing roller, impact and the frequency that the belt received, and the tensile condition in the motion process of belt record and utilize big data analysis's method, monitor the quality of belt, when data accumulation reaches certain degree, can realize the diagnosis to the belt quality, that is to say, when the belt receives the great impact of a certain amount, and receive its inside inevitable quality change that produces when great tensile of a certain amount, just can confirm whether need to maintain or change the belt according to the size of quality change. According to the thought, the impact sensor and the rotary sensor are arranged in the embodiment, data monitoring and accumulation are carried out by utilizing the two sensors and the matched weighing sensor, and finally the purpose of evaluating the quality of the belt is achieved.
The impact sensor and the rotation sensor are designed as sensors having power generation capability in the present embodiment. In general, the signals output by the sensors are weak electrical signals as long as the signals can transmit information. However, in this embodiment the energy generated by the idler is relatively large and a relatively large sensor must be used. Unfortunately, this energy is discarded after testing, and thus this embodiment collects this energy as the energy source for the instrument, thus obtaining both the necessary information and saving energy.
In a similar way, the embodiment uses the rotary power generation sensor when detecting the motion state of the belt, converts the translational motion of the belt into the rotational motion of the carrier roller, estimates the tensile force borne by the belt by utilizing the rotation generated by the friction between the belt and the carrier roller and combining the weight borne by the current belt weighed by the weighing sensor, and analyzes the tensile force through big data so as to obtain the evaluation on the quality of the belt. In the embodiment, the rotary power sensors and the weighing sensors are in one-to-one correspondence, namely, the weighing sensors can be installed together when the rotary power sensors are installed on the conventional carrier roller.
It should be noted that the belt conveyor described in this embodiment is provided with an impact resistant section, that is, a plurality of buffer rollers capable of springing up and down are specially arranged at the head of the belt conveyor or a position close to the head. When the conveyor works, the buffer carrier rollers of the impact-resistant section of the belt conveyor are arranged below a discharge hole of an upper conveyor 6 (see figure 1) and are specially used for receiving materials input by the upper conveyor. When the materials fall onto the belt, the buffer carrier rollers can move downwards under the impact of the materials to play a role in buffering, and automatically recover to the original position when the impact is not borne, so that the up-and-down movement is utilized by the embodiment, the up-and-down movement capacity is collected and is used as a sensor output signal and energy output. Other belt conveyor idlers that do not have impact resistance relative to impact idler are referred to as conventional idlers, or simply idlers.
In order to analyze more data and improve the analysis and diagnosis capability, the embodiment can also be added with a sensor for detecting the accumulation shape of the material on the belt and a sensor for detecting the movement speed of the material, wherein the former can be a binocular video sensor or a 3D camera, and the latter can be a laser radar or a sonar sensor, and the two sensors can also be mutually universal, namely the video sensor can also measure the movement speed of the material flow, and the laser radar or the sonar can also measure the shape of the material pair.
The shape of the material stack and the speed of movement of the material pairs are also one of the important factors in determining the quality of the belt. The distribution that can obtain the material through the shape to the material heap is judged and weight is very important to the judgement of belt atress unevenness, and the density of material can be judged out in the shape and the weighing sensor cooperation of material heap, and then calculates the dry and wet degree and the stack angle isoparametric of material, and these parameters all are very important information to the later stage transportation.
The signal acquisition and analysis unit, the central processing unit, the database, the interaction unit and the like described in this embodiment may be integrated in an industrial PC, or integrated in other devices having electronic digital storage, operation and display functions, such as an embedded system, through electronic devices such as a reinforced single chip microcomputer, or even integrated in a centralized control computer system of the whole belt transportation system, and perform centralized data sharing and big data analysis with other belt transportation devices.
Example two:
this embodiment is a modification of the above-described embodiment, and is a refinement of the above-described embodiment with respect to the signal acquisition and analysis unit. The signal acquisition and processing unit described in this embodiment is further electrically connected to the binocular video sensor 7 and the lidar sensor 8, as shown in fig. 1, and the schematic block diagram of the electrical connection is shown in fig. 3.
The binocular video sensor and the laser radar sensor are arranged above the belt conveyor and can be arranged on a door-shaped support, as shown in figure 1, the support is arranged across the belt conveyor, and the two sensors look down on the passing belt and materials on the belt.
The binocular video sensor is a 3D stereoscopic photographing apparatus capable of calculating the size and distance of an object to be observed through parallax between two cameras. This embodiment uses this property of the binocular video sensor to calculate the volume and shape of the material pair.
The laser radar sensor is a sensor capable of measuring the movement speed of an object through the Doppler effect, and can also measure the shape of the object through the Doppler effect, and for the embodiment, the laser radar sensor is the shape of a material pile, but the accuracy is lower than that of a binocular video sensor.
Example three:
the present embodiment is a refinement of the above-described embodiment, which is a refinement of the above embodiment regarding the impulse power generation sensor. The impulse power generation sensor according to the present embodiment includes: the belt conveyor comprises a stator fixedly mounted on a belt rack and a rotor capable of moving up and down together with a buffer carrier roller.
The impact power generation sensor described in this embodiment is a device that generates power by using up-and-down motion, and the process of generating power may be power generation by using an electromagnetic field, or power generation by generating a piezoelectric effect when a piezoelectric sheet impacts.
Example four:
the present embodiment is a refinement of the above-described embodiment, which is a refinement of the above embodiment regarding the impulse power generation sensor. The stator described in this embodiment is an electromagnetic coil winding, and the mover is a permanent magnet.
When the permanent magnet of the rotor moves up and down along with the buffering, induced current is generated in the electromagnetic coil of the stator, and power generation output is formed. And the generation of the induced current has certain damping effect, which is equivalent to that a damper is arranged on the impact idler, so that the ineffective vibration of the impact idler is reduced.
Example five:
the present embodiment is a refinement of the above-described embodiment, which is a refinement of the above embodiment regarding the impulse power generation sensor. The impulse power generation sensor described in this embodiment is a piezoelectric sheet.
The piezoelectric sheet is arranged on the stator, the rotor is only a simple impact surface and impacts the piezoelectric sheet to enable the piezoelectric sheet to generate electric energy, and the impact mode needs to be provided with a buffer device, namely, a set of buffer device is arranged at the position where the piezoelectric sheet is installed to avoid piezoelectric damage caused by impact.
Example six:
the present embodiment is a refinement of the above-described embodiments, and is a refinement of the above embodiments with respect to the rotary electric power generation sensor. The rotation power generation sensor described in this embodiment is a generator.
The rotary power generation is a mature power generation mode, the efficiency is high, the defect is that damping is generated on the rotation of a carrier roller, therefore, the power of a generator selected by a rotary power generation sensor cannot be too large so as to avoid interference on the movement of a belt, but due to the high power generation efficiency, even a small-sized generator with low power can improve enough energy to be used by each processing unit and other sensors.
Example seven:
the present embodiment is a refinement of the above-described embodiment, which is a refinement of the above embodiment regarding the bus power supply unit. The power supply unit that converges described in this embodiment is equipped with the battery.
Although the impact power generation sensor can increase very strong electric energy, the impact is intermittent motion and is very unstable, so a large capacitor is needed for stabilization, and basically, the effect of storing energy by using a storage battery when excessive electric quantity is generated is better. Because of the rapid development of modern power batteries, the storage of redundant energy by a storage battery is a good choice, and the whole equipment can be completely separated from the mains supply to form a completely independent system.
Example eight:
the embodiment is a belt state monitoring method of a self-powered belt conveyor using the monitoring device. The basic idea of the embodiment is as follows: the data are accumulated by utilizing the intensity and frequency of the impact of the recorded belt by the materials and the tension born by the belt when the belt bears the materials to form an expert system, the on-site monitoring is realized by utilizing the previous data to analyze, compare and judge the quality of the belt, and the safety accidents such as belt breakage are avoided.
The method comprises the following specific processes and steps:
the present embodiment includes three processes: the no-load monitoring process is that when the belt has no material, the surface of the belt is optically observed, the other process is monitoring carried out when the belt conveyor carries out transportation operation, and the third process is a power generation process.
Firstly, an idle load monitoring process:
the binocular video sensor collects video images of the belt surface of the belt in real time under the condition of no-load movement of the belt, the currently collected video images of the belt surface of the belt are compared with the video images of the belt surface of the belt collected in the past, so that whether the surface of the belt has the defects of breakage, tearing and bulging of the belt surface or not is judged, and if the defects are found, an alarm is given and the machine is stopped for maintenance.
Conventional belt surfaces are typically observed by a human eye. The present embodiment adopts a video image analysis method. Due to the rapid development of modern video image analysis technology, the comparative analysis of video images is mature, so that the condition of the current belt can be evaluated only by recording the belt surface image with good quality and comparing the belt surface image with the current belt surface, even the video in a plurality of time periods can be used for comparison to obtain the slight change on the belt surface, thereby monitoring the possible fault points of the belt and realizing early warning.
Secondly, the monitoring process during normal work comprises the following steps:
step 1, collecting impact information: when the material falls down from the upper computer and impacts the buffer carrier roller, the impact power generation sensor records the impact strength and frequency of the belt.
Because of the limitation of the precision of the sensor, the record of the impact strength has a certain threshold value, and the record cannot be carried out by small impact, which does not affect the accuracy of the record.
The collection of the bearing information is completed by the rotary power generation sensor and the weighing sensor. When the belt bears less, the friction force of the belt to the carrier roller is also less, and in addition, the damping effect of the generator enables the rotary power generation sensor to rotate insufficiently, and the tensile force applied to the current belt can be judged by comparing the real movement speed of the belt with the data of the adjacent rotary power generation sensor and the adjacent weighing sensor.
And step 3, respectively storing: the signal acquisition and processing unit collects the impact strength, divides the impact strength into a plurality of strength grades and stores the strength grades respectively, analyzes the frequency density after receiving the impact frequency, and stores the frequency densities of different stages respectively.
Storing data is a very important step because only the correct stored data can perform the efficiency of big data analysis. In the embodiment, various data are screened and classified, and different classifications are stored respectively for application. For example, impact strength is generally classified into: weak, medium and medium strong, extra strong, extremely strong, etc. During analysis, the seven grades are respectively compared and analyzed, and a correct conclusion can be obtained. And the storage can quickly extract the data, thereby reducing the waste of resources and the waste of time.
And 4, analyzing and comparing: the central unit analyzes the belt's tension with respect to belt impact strength and frequency and belt load, stores the analysis results with synchronized data, and compares current data with past data to determine belt quality.
The key of the embodiment lies in the analysis of the past data and the comparison between the past data and the current data, so the storage and analysis of the past data are very important processes, and the current judgment can not achieve the application effect without the support of the past data.
And 5, uploading and displaying: and uploading the analysis result to a transportation chain upper computer or an underground equipment monitoring center in a wireless communication mode, and displaying the analysis result on a monitoring terminal in a form of a table or a coordinate graph.
The analysis result can be uploaded to a transportation chain control center or a downhole equipment monitoring center in a wireless transmission mode in the form of 4g or 5g or downhole ultra wide band wifi6 and the like, and is displayed on a screen in an electronic display mode. The analysis result can be made into a table, a histogram or a coordinate graph, and necessary information is conveyed in a direct visual mode, and the analysis result comprises the following steps: current surface quality of the belt, amount of stretch, etc.
The power generation process comprises the following steps:
in the process of carrying out no-load monitoring, electric energy generated by the rotary power generation sensor is transmitted to the confluence power supply unit, the confluence power supply unit collects and rectifies the collected electric energy, converts the electric energy into a stable power supply to be supplied to each unit for use, and stores redundant electric energy in a storage battery;
during the monitoring process during normal operation, the electric energy generated by the impact power generation sensor and the rotation power generation sensor is transmitted to the confluence power supply unit, the confluence power supply unit enables the collected electric energy to be a stable power supply to be supplied to each unit for use through collection and rectification, and redundant electric energy is stored in the storage battery.
Because the collected electric energy is unstable energy, rectification is needed, and a larger capacitor is used for current stabilization, or other electronic devices are used for current stabilization, so that the power supply meets the requirements of electronic circuits.
Example nine:
this embodiment is a modification of the eighth embodiment, and is a refinement of the eighth embodiment regarding the monitoring data. Step 1-2 described in this embodiment also includes turning on a binocular video sensor to detect the volume of the material flow in real time, and turning on a laser radar sensor to monitor the material flow velocity; the material speed detected by the laser radar sensor is the actual moving speed of the material flow, and the rotating power generation sensor detects the rotating speed of the carrier roller generated by the friction of the belt on the carrier roller. Therefore, the material flow speed detected by the laser radar sensor is not equal to the material flow speed detected by the rotation of the carrier roller, and the embodiment evaluates the quality of the belt by using the difference between the two speeds so as to monitor the current quality state of the belt.
Step 4 also includes: and the impact strength and frequency, the bearing of the belt and the material flow information are combined to analyze the quality state of the belt.
The two data sources are added, so that the analysis is more accurate and the judgment is more accurate.
Finally, it should be noted that the above only serves to illustrate the technical solution of the present invention and is not restrictive, and although the present invention has been described in detail with reference to preferred arrangements, a person skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the present invention (such as the form and structure of the belt conveyor, the form and structure of the sensors used, the form and structure of the processing unit, etc.) without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. A belt condition monitoring device of a self-powered belt conveyor, comprising: the impact power generation sensors are arranged on a plurality of buffer carrier rollers of a receiving section of the belt conveyor, and at least two conventional carrier rollers of the belt conveyor are provided with a rotary power generation sensor and a weighing sensor; the impact power generation sensor, the rotary power generation sensor and the weighing sensor are electrically connected with the signal acquisition and processing unit, the signal acquisition and processing unit is electrically connected with the central processing unit, and the central processing unit is electrically connected with the database and the interaction unit; the impact power generation sensor and the rotation power generation sensor are electrically connected with the confluence power supply unit.
2. The monitoring device of claim 1, wherein said signal acquisition and processing unit is further electrically connected to a binocular video sensor and a lidar sensor.
3. The monitoring device of claim 2, wherein the impulse power sensor comprises: the belt conveyor comprises a stator fixedly mounted on a belt rack and a rotor capable of moving up and down together with a buffer carrier roller.
4. The monitoring device of claim 3, wherein said stator is a solenoid winding and said mover is a permanent magnet.
5. The monitoring device of claim 2, wherein the impulse charging sensor is a piezoelectric patch.
6. A device according to any one of claims 1 to 5, wherein the rotary electric generator sensor is an electric generator.
7. The monitoring device of claim 6, wherein the bus power supply unit is provided with a battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020860727.8U CN211978320U (en) | 2020-05-21 | 2020-05-21 | Belt state monitoring device of self-powered belt conveyor |
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| CN202020860727.8U CN211978320U (en) | 2020-05-21 | 2020-05-21 | Belt state monitoring device of self-powered belt conveyor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075220A (en) * | 2021-03-26 | 2021-07-06 | 太原理工大学 | Self-powered 5G perception diagnosis and prediction system for damage of mining conveying belt |
| CN113135402A (en) * | 2021-04-07 | 2021-07-20 | 国电汉川发电有限公司 | Belt blockage detection method and system based on laser scanning |
-
2020
- 2020-05-21 CN CN202020860727.8U patent/CN211978320U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075220A (en) * | 2021-03-26 | 2021-07-06 | 太原理工大学 | Self-powered 5G perception diagnosis and prediction system for damage of mining conveying belt |
| CN113135402A (en) * | 2021-04-07 | 2021-07-20 | 国电汉川发电有限公司 | Belt blockage detection method and system based on laser scanning |
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Address after: 100013 No. 5 Youth ditch East Road, Hepingli, Beijing, Chaoyang District Patentee after: General Coal Research Institute Co.,Ltd. Address before: 100013 No. 5 Youth ditch East Road, Hepingli, Beijing, Chaoyang District Patentee before: CHINA COAL Research Institute |