Control system for mining intrinsic safety type belt weigher

Abstract

The invention relates to the technical field of weighing equipment, in particular to a control system for a mining intrinsic safety type belt weigher. The system comprises a conveying device used for conveying materials, an energy supply device used for supplying energy to the conveying device and a belt weigher used for measuring the materials, gravity information and speed information are obtained through a weighing unit and a testing unit in the belt weigher respectively, and then a conversion unit processes the gravity information and the speed information to obtain a pressure difference signal and a pulse signal; then the extraction unit obtains an instantaneous quantity and a cumulant based on the processing of the differential pressure signal and the pulse signal, the analysis unit judges whether the operation of the belt weigher in the current measurement period is qualified or not based on the calculated cumulant, if yes, the cumulant is output, and if not, the reason is determined and a corresponding correction instruction is generated; operating parameters of the corresponding devices or units are adjusted through the control unit based on the instructions; the self-adjustment of the system is realized by adjusting operation parameters, so that the material measurement precision of the belt weigher in the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of weighing equipment, and particularly relates to a control system for a mine intrinsically safe belt scale. Background Art

[0002] An intrinsically safe belt scale can be adapted to harsh environments such as coal mines and is used to weigh the materials on a belt conveyor. By means of the provided weighing sensors and speed sensors, differential pressure signals and pulse signals are collected during material transportation, and by integrating the differential pressure signals and pulse signals in real time, the instantaneous amount and cumulative amount of the materials are calculated, so as to continuously and dynamically measure solid materials and realize the statistics and control of the material flow.

[0003] In the prior art, the Chinese patent publication number: CN114593796A discloses a control system for a belt type weighing scale. The system includes a belt conveyor and a gravity sensor, a speed sensor and a camera recognition module arranged inside the belt conveyor. Relevant information is collected through a communication module and transmitted to a control center module, and the control center module calculates the running state of the conveyed object, material measurement and cumulative work based on the received information, displays the status information of the belt scale, and stores the actual running data. However, for the current system, since only the material measurement and cumulative work are measured, the technical solution does not involve means for adjusting the running parameters of the system according to the measurement data to improve the measurement accuracy of the belt scale in the system. Summary of the Invention

[0004] Therefore, the present invention provides a control system for a mine intrinsically safe belt scale to solve the problem that in the prior art, there is no means to determine the running state of the belt scale based on the cumulative amount and adjust the system accordingly, so as to improve the measurement accuracy of the belt scale.

[0005] To achieve the above object, the present invention provides a control system for a mine intrinsically safe belt scale, including: An energy supply device for providing electric energy; A conveying device, which includes a belt for conveying materials and a driving device for driving the belt to rotate, and the driving device is connected to the energy supply device; A belt scale, which is arranged on the conveying device and includes a weighing unit, a speed measuring unit, a telescopic unit, a conversion unit, an extraction unit, an analysis unit and a control unit; The weighing unit includes a plurality of weighing sensors in contact with the surface of the belt and is used to obtain gravity information when the belt conveys the materials; The speed measuring unit includes a plurality of speed sensors connected to the belt and is used to obtain speed information when the belt conveys the materials; The telescopic unit is used to adjust the position height of the weighing unit; The conversion unit is respectively connected to the weighing unit and the speed measuring unit, and is used to obtain a differential pressure signal based on the gravity information and obtain a pulse signal based on the speed information; The extraction unit is connected to the conversion unit, and is used to process the differential pressure signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity, wherein the cumulative quantity is the sum of a plurality of instantaneous quantities; The analysis unit is connected to the extraction unit, and is used to generate a corresponding processing method based on the cumulative quantity, including: outputting the cumulative quantity, or generating a corresponding instruction based on the determined unqualified reason; The control unit is respectively connected to the driving device, the weighing sensor, the speed sensor, the telescopic unit, and the analysis unit, and is used to adjust the operating parameters of the corresponding device or unit based on the instruction, and the parameters include: the operating power of the driving device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the determination reference of the analysis unit.

[0006] Further, the analysis unit is used to re-determine whether the belt scale is operating qualified based on the comparison result between the cumulative quantity and the preset cumulative quantity pre-stored in the analysis unit, or based on the angle between the conveyor and the plane, and, in the case of determining that the belt scale is operating unqualified, determine the unqualified reason based on the cumulative quantity difference, wherein the cumulative quantity difference is the difference between the preset cumulative quantity and the cumulative quantity.

[0007] Further, the analysis unit is also used to re-determine that the belt scale is operating unqualified based on the comparison result between the angle and the preset angle range pre-stored in the analysis unit, or reduce the determination reference of the analysis unit based on the angle difference, wherein the angle difference is the absolute value of the difference between the angle and the preset angle range.

[0008] Further, the analysis unit is also used to reduce the preset cumulative quantity based on the comparison result between the angle difference and the preset angle difference pre-stored in the analysis unit, and the reduction amplitude of the preset cumulative quantity is proportional to the angle difference.

[0009] Further, the analysis unit is also used to determine the reason for the unqualified operation of the belt scale based on the comparison result between the cumulative quantity difference and the preset cumulative quantity difference pre-stored in the analysis unit, and generate a corresponding correction method based on the determined reason, including: increasing the extension amount of the telescopic unit, or re-determining the unqualified reason based on the variance, wherein the variance is calculated from a plurality of measurement time nodes and the corresponding plurality of instantaneous quantities within a single measurement cycle.

[0010] Furthermore, the analysis unit is also used to increase the extension amount of the telescopic unit based on the comparison result of the vibration amplitude and the preset vibration amplitude pre-stored in the analysis unit, and the increase in the extension amount is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

[0011] Furthermore, when the adjustment for increasing the extension amount is completed, the analysis unit determines that the belt scale is not operating properly based on the re-comparison result of the cumulative amount difference with the preset cumulative amount difference, and then issues a correction notification for the sensor, wherein the sensor includes a weighing sensor and a speed sensor.

[0012] Furthermore, the analysis unit is also used to redetermine the reason for the unqualified operation of the belt scale based on the comparison result of the variance with the preset variance pre-stored in the analysis unit, and generate a corresponding correction method based on the determined reason, including: increasing the operating power of the drive device, or issuing a correction notification for abnormal sensors, wherein the abnormal sensors include weighing abnormality sensors and speed abnormality sensors.

[0013] Furthermore, the analysis unit is also used to determine to increase the operating power of the drive device based on a comparison result of the cumulative amount difference ratio with a preset cumulative amount difference ratio pre-stored in the analysis unit, and the increase in the operating power is proportional to the cumulative amount difference ratio, wherein the cumulative amount difference ratio is the ratio between the cumulative amount difference and the preset cumulative amount difference.

[0014] Furthermore, when the adjustment for increasing the operating power is completed, the analysis unit is also used to determine the reason for the unqualified operation of the belt scale based on the comparison result of the expected moving speed and the actual moving speed, and generate a corresponding correction method based on the determined reason, including: issuing a maintenance notice for the power supply device, wherein the expected moving speed is the moving speed determined after adjusting the operating power, and the actual moving speed is the moving speed measured by the speed measuring unit.

[0015] Compared with the prior art, the beneficial effect of a control system for a mine intrinsically safe belt scale according to the present invention is that the system includes a conveying device for conveying materials, an energy supply device for supplying energy to the conveying device, and a belt scale for measuring materials; the belt scale includes a weighing unit, a speed measuring unit, a telescopic unit, a conversion unit, an extraction unit, an analysis unit, and a control unit. The gravity information and speed information are respectively obtained through the weighing unit and the testing unit, and then the conversion unit processes the gravity information and speed information to obtain a differential pressure signal and a pulse signal. Then, the extraction unit processes based on the differential pressure signal and the pulse signal to obtain an instantaneous quantity and an accumulated quantity. The analysis unit determines whether the operation of the belt scale within the current measurement period is qualified based on the calculated accumulated quantity. If it is qualified, the accumulated quantity is output. If it is unqualified, the reason is determined and a corresponding correction instruction is generated. The control unit adjusts the operation parameters of the corresponding device or unit based on the instruction. The parameters include: the operating power of the driving device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the determination reference of the analysis unit. The self-adjustment of the system is realized by adjusting the operation parameters, thereby improving the measurement accuracy of the belt scale for materials in the system.

[0016] Further, the present invention determines whether the operation of the belt scale is qualified based on the comparison result between the accumulated quantity and the preset accumulated quantity, and can determine the reason based on the accumulated quantity difference, so as to timely correct the operation parameters in the system to improve the qualified rate of the belt scale operation.

[0017] Further, the present invention also re-determines that the operation of the belt scale is unqualified based on the comparison result between the angle between the conveying device and the plane and the preset angle range, or determines to adjust the determination reference of the analysis unit based on the angle difference. The determination accuracy of the operation status of the belt scale in the system is improved through secondary determination, making the determination result of the operation status of the belt scale more accurate.

[0018] Further, the present invention also reduces the determination reference of the analysis unit based on the comparison result between the angle difference and the preset angle difference, that is, reduces the preset accumulated quantity to increase the qualified rate of the belt scale operation.

[0019] Further, the present invention also determines the reason for the unqualified operation of the belt scale based on the comparison result between the accumulated quantity difference and the preset accumulated quantity difference, and generates a corresponding correction method based on the reason, including: adjusting the extension amount of the telescopic unit to improve the qualified rate of the belt scale operation, or re-determining the reason for the unqualified operation of the belt scale based on the variance.

[0020] Furthermore, the present invention also increases the extension amount of the telescopic unit based on the comparison result between the vibration amplitude and the preset vibration amplitude, thereby improving the measurement position of the weighing unit, enabling the weighing unit to better contact the belt surface, and thus being able to more stably measure the weight of the material, reducing the influence of other factors on the operation of the belt scale, and increasing the qualified rate of the belt scale operation.

[0021] Furthermore, after the adjustment of the extension amount of the telescopic unit is completed, when it is determined again that the belt scale is operating unqualified based on the comparison result between the cumulative difference and the preset cumulative difference, a calibration notice can be sent to the sensor, and by calibrating the sensor, the factors affecting the operation of the belt scale can be reduced, thereby improving the measurement accuracy of the belt scale.

[0022] Furthermore, the present invention also generates corresponding correction methods based on the comparison result between the variance and the preset variance: increasing the operating power of the driving device, or sending a calibration notice to the abnormal sensor, and improving the probability of the belt scale operating qualified by correcting the system.

[0023] Furthermore, the present invention also determines to increase the operating power of the driving device based on the ratio of the cumulative difference to the preset ratio of the cumulative difference, thereby increasing the rotation speed of the belt and improving the probability of the belt scale operating qualified.

[0024] Furthermore, after the adjustment of the operating power of the driving device is completed, when it is verified that the belt scale is still unqualified based on the comparison result between the expected moving speed and the actual moving speed, a maintenance notice for the power supply device is sent to solve the moving speed problem, thereby improving the probability of the belt scale operating qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the modules of a control system for a mine intrinsically safe belt scale according to the present invention; Figure 2 It is a schematic diagram of the process of a control system for a mine intrinsically safe belt scale according to the present invention; Figure 3 It is a schematic diagram of the process for determining whether the belt scale is operating qualified based on the cumulative amount according to the present invention; Figure 4 It is a schematic diagram of the process for determining the reason for the unqualified belt scale process and the correction based on the cumulative difference according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0028] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In this embodiment, a control system for a mine intrinsically safe belt scale is provided. Through this system, the instantaneous quantity and cumulative quantity (both referring to the weight information of materials such as ore) can be quickly and accurately measured in places such as mines for ore mining, and it can be applied to flammable and explosive environments. By adjusting the operating parameters in the system according to the determined results, the system is enabled to have a self-learning ability, thereby being able to improve the data processing ability and self-improving ability, and improving the measurement accuracy of the belt scale.

[0031] Please refer to Figure 1 as shown, which is a schematic diagram of the modules of the control system for the mine intrinsically safe belt scale in this embodiment. The system includes: Energy supply device for providing electrical energy; conveying device including a belt for conveying materials and a driving device for driving the belt to rotate, the driving device being connected to the energy supply device; belt scale disposed on the conveying device, including a weighing unit, a speed measuring unit, a telescopic unit, a conversion unit, an extraction unit, an analysis unit, and a control unit; the weighing unit including a plurality of weighing sensors in contact with the surface of the belt and configured to obtain gravity information based on the belt conveying the materials; the speed measuring unit including a plurality of speed sensors connected to the belt and configured to obtain speed information based on the belt conveying the materials; the telescopic unit for adjusting the position height of the weighing unit; the conversion unit being connected to the weighing unit and the speed measuring unit respectively, and configured to obtain a differential pressure signal based on the gravity information and a pulse signal based on the speed information; the extraction unit being connected to the conversion unit and configured to process the differential pressure signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity, where the cumulative quantity is the sum of a plurality of instantaneous quantities; the analysis unit being connected to the extraction unit and configured to generate a corresponding processing method based on the cumulative quantity, including: outputting the cumulative quantity, or generating a corresponding instruction based on a determined unqualified reason; the control unit being connected to the driving device, the weighing sensors, the speed sensors, the telescopic unit, and the analysis unit respectively, and configured to adjust the operating parameters of the corresponding device or unit based on the instruction, the parameters including: the operating power of the driving device, the extension amount of the telescopic unit, the calibration of the weighing sensors or speed sensors, and the determination criterion of the analysis unit.

[0032] Specifically, in this embodiment, the energy supply device can be a generator or a power cable, which provides power for the electrical equipment in the system to enable the normal operation of the system. The conveying device includes a belt and a driving device in transmission connection with the belt, and the belt is driven to rotate by the energy supply device in transmission connection with the driving device. While the belt rotates, it drives the materials to move together. Here, in this embodiment, the materials are ores and the driving device is a driving motor.

[0033] The belt weigher continuously weighs the materials conveyed on the conveying device. In this embodiment, the belt weigher is arranged on the conveying device and includes a weighing unit, a speed measuring unit, a telescopic unit, a conversion unit, an extraction unit, an analysis unit, and a control unit. When the belt passes through a position with materials, several weighing sensors in the weighing unit can contact the belt surface to obtain gravity information, which is proportional to the pressure information generated when the materials press down on the belt. Also, when the speed unit is connected to the conveying device, speed information can be obtained through several speed sensors, and the speed information is proportional to the moving speed information of the belt conveying materials. The telescopic unit adjusts the height of the weighing unit according to the adjustment instruction, so as to adjust the contact position between the weighing sensor and the belt. The conversion unit connected to the weighing unit and the speed measuring unit obtains the gravity information and speed information generated at a certain moment, then processes the gravity information to obtain a differential pressure signal, and processes the speed information to obtain a pulse signal. The extraction unit connected to the conversion unit obtains the converted differential pressure signal and pulse signal, and then performs integral processing on the differential pressure signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity. The instantaneous quantity refers to the amount of materials flowing through the belt weigher at a certain moment, and the instantaneous quantity changes in real time, reflecting the real-time production capacity of the production line. The cumulative quantity refers to the cumulative value of the total amount of materials passing through the belt weigher within a single measurement cycle, that is, the sum of several instantaneous quantities. The cumulative quantity reflects the total amount of material flow in the production process and is usually used to monitor and control the material flow. Then, the analysis unit connected to the extraction unit obtains the cumulative quantity, determines whether the operation status of the belt weigher is qualified based on the cumulative quantity, and, based on the determination result, determines the corresponding processing method, including: outputting the cumulative quantity, or generating a corresponding instruction based on the determined unqualified reason; the control unit connected to the analysis unit obtains this instruction, and adjusts the operation parameters of the corresponding device or unit connected to the control unit through this instruction. The parameters include: the operation power of the sub-drive device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the determination reference of the analysis unit. The present invention enables the control system of the belt weigher to have a certain degree of self-learning ability, enabling the system to determine whether the operation status of the belt weigher is qualified based on the comparison result of the cumulative quantity and adjust the operation parameters of the corresponding unit in the system according to the instruction, thereby improving the measurement accuracy and real-time processing ability of the belt weigher, and more accurately detecting and controlling the material flow in production. In this embodiment, the weighing sensor is a resistance strain type sensor; in other embodiments, the weighing sensor can also be an analog sensor and a digital sensor.

[0034] Please refer to Figure 2 shown, which is a schematic flow chart of the control system for a mine intrinsically safe belt weigher. The process includes: S11: Obtain gravity information based on the belt conveying materials.

[0035] S12: Obtain speed information when conveying materials by belt.

[0036] S2: Obtain a differential pressure signal based on gravity information and obtain a pulse signal based on the speed information.

[0037] S3: Perform integral processing on the differential pressure signal and the pulse signal to obtain an instantaneous quantity and an accumulated quantity.

[0038] S4: Generate corresponding processing methods based on the accumulated quantity, including: outputting the accumulated quantity, or generating a corresponding instruction based on the determined unqualified reason.

[0039] S5: Adjust the operating parameters of the corresponding device or unit based on the instruction. The parameters include: the operating power of the driving device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the determination reference of the analysis unit.

[0040] Please refer to Figure 3 As shown, it is a flow diagram for determining whether the operation of the belt scale is qualified based on the accumulated quantity in this embodiment. The analysis unit is used to re-determine whether the operation of the belt scale is qualified based on the comparison result between the accumulated quantity and the preset accumulated quantity pre-stored in the analysis unit, or based on the angle between the conveying device and the plane, and, in the case of determining that the operation of the belt scale is unqualified, determine the unqualified reason based on the accumulated quantity difference, where the accumulated quantity difference is the difference between the preset accumulated quantity and the accumulated quantity.

[0041] Specifically, in this embodiment, the preset accumulated quantity G0 includes a first preset accumulated quantity G1 and a second preset accumulated quantity G2, G1 < G1. The specific process of comparing the accumulated quantity with the preset accumulated quantity G0 is as follows: If the accumulated quantity is less than or equal to G1, it means that the operation of the belt scale in the current measurement period is unqualified, and it is necessary to find out the reason for the unqualified belt scale based on the accumulated quantity difference. Specifically, the accumulated quantity difference is the difference between the first preset accumulated quantity G1 and the accumulated quantity. If the accumulated quantity is greater than G1 and less than or equal to G2, the operating state of the belt scale cannot be accurately determined. At this time, it can be re-determined based on the angle between the conveying device and the plane. By secondary determination, the accuracy of the determination result can be improved. The plane here can be the ground for installing the conveying device. If the accumulated quantity is greater than G2, it means that the operation of the belt scale in the current measurement period is qualified. Specifically, in this embodiment, the preset accumulated quantity G0 is set to 10 tons, G1 = 0.95×G, and the second preset accumulated quantity G2 = 1.03×G. It should be noted that the settings of G1 and G2 can be set according to the production situation, and G1 and G2 are the determination references of the analysis unit.

[0042] Further, the analysis unit is further configured to re-determine that the belt scale is operating unqualified based on the comparison result between the included angle and a preset included angle range pre-stored in the analysis unit, or reduce the determination criterion of the analysis unit based on the angle difference, where the angle difference is the absolute value of the difference between the included angle and the preset included angle range.

[0043] Specifically, in this embodiment, the included angle between the conveying device and the plane is the included angle between the belt and the plane. Generally speaking, the included angle between the belt in a belt conveyor for conveying ores and the ground is generally between 10° and 20°. Therefore, a preset included angle range can be determined as [10°, 20°]. If the included angle exceeds the preset included angle range, it indicates that the belt is not properly arranged. The specific process of comparing the included angle with the preset included angle range is as follows: If the included angle is greater than or equal to 10° and less than or equal to 20°, that is, the included angle is within the preset included angle range, it indicates that the current belt placement is reasonable. If there is also a situation where the cumulative amount is greater than the first preset cumulative amount G1 and less than or equal to the second preset cumulative amount G2, it can be determined that the belt scale is operating unqualified. If the included angle is less than 10° or greater than 20°, it indicates that the current belt placement is unreasonable. Therefore, when there is a situation where the cumulative amount is greater than G1 and less than or equal to G2, the determination criterion of the analysis unit, that is, the preset cumulative amount G0, can be corrected, and G0 is reduced based on the angle difference. The angle difference is the absolute value of the difference between the included angle and the preset included angle range.

[0044] Further, the analysis unit is further configured to reduce the preset cumulative amount based on the comparison result between the angle difference and a preset angle difference pre-stored in the analysis unit, and the reduction amplitude of the preset cumulative amount is proportional to the angle difference.

[0045] Specifically, in this embodiment, the preset angle difference T0 includes a first preset angle difference T1 and a second preset angle difference T2 greater than the first preset angle difference T1. The specific process of comparing the angle difference with the preset angle difference is as follows: If the angle difference is less than or equal to T1, the control unit uses the first reference adjustment coefficient to reduce the preset cumulative amount G to 0.98 times the initial value. If the angle difference is greater than T1 and less than or equal to T2, the control unit uses the second reference adjustment coefficient to reduce G0 to 0.96 times the initial value. If the angle difference is greater than T2, the control unit uses the third reference adjustment coefficient to reduce G0 to 0.95 times the initial value. Specifically, in this embodiment, the preset angle difference T0 is set to 3°, T1 = 0.5×T0, and T2 = 2×T0; it should be noted that T0, T1, and T2 can also be adjusted according to the angle of the belt placement, and the reduction ratio of G0 can also be adjusted according to the production situation.

[0046] Please refer to Figure 4As shown, it is a flow chart of determining the cause of the belt scale process failure and correction based on the cumulative amount difference in this embodiment. The analysis unit is also used to determine the cause of the belt scale failure based on the comparison result of the cumulative amount difference and the preset cumulative amount difference pre-stored in the analysis unit, and generate a corresponding correction method based on the determined cause, including: increasing the extension amount of the telescopic unit, or re-determining the cause of failure based on the variance, wherein the variance is calculated from a number of measurement time nodes and a corresponding number of instantaneous quantities in a single measurement cycle.

[0047] Specifically, in this embodiment, after determining that the belt scale is unqualified, the cause of the unqualified operation can be determined based on the comparison between the cumulative amount difference and the preset cumulative amount difference Q0, so as to find the corresponding correction method. The specific comparison process is as follows: If the cumulative amount difference is less than or equal to Q0, at this time, the cumulative amount difference is within a reasonable range, and the reason for the unqualified operation of the belt scale cannot be accurately determined. It is necessary to redetermine the reason based on the variance, wherein a time-instantaneous amount curve is constructed by a number of measurement time nodes and one-to-one corresponding instantaneous amounts in a single measurement cycle, and the variance is obtained based on the curve, and the reason for the unqualified operation of the belt scale is redetermined based on the variance. If the cumulative amount difference is greater than Q0, it means that there is a problem with the environment described by the current belt scale. Due to the large vibration of the environment and the conveying device at the same time, the weighing unit in the belt scale cannot effectively contact the belt surface, resulting in a large error in the measurement result. The vibration amplitude of the belt is determined according to the vibration monitor on the conveying device and the vibration signal is sent to the analysis unit. The analysis unit analyzes the vibration signal and generates an instruction and sends the instruction to the control unit. The control unit adjusts the extension amount of the telescopic unit, which can be the telescopic height of the telescopic unit, so as to adjust the height position of the weighing unit, so that the weighing unit can be in continuous contact with the belt surface, thereby improving the measurement precision and accuracy of the belt scale. Specifically, in this embodiment, Q0 is set to 0.03 tons; it should be noted that the setting of Q0 can also be adjusted according to production conditions and is not specifically limited.

[0048] Furthermore, the analysis unit is also used to increase the extension amount of the telescopic unit based on the comparison result of the vibration amplitude and the preset vibration amplitude pre-stored in the analysis unit, and the increase in the extension amount is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

[0049] Specifically, in this embodiment, the extension amount of the telescopic unit is adjusted by the size of the vibration amplitude, and then the height of the weighing unit can be adjusted. The larger the vibration amplitude, the greater the fluctuation of the belt. In order to ensure that the weighing unit can continue to contact the belt, it is necessary to increase the height of the weighing unit accordingly to ensure that the weighing unit can also contact the belt when the belt fluctuates too much, so as to effectively measure the weight of the material; the preset vibration amplitude W0 includes a first preset vibration amplitude W1 and a second preset vibration amplitude W2, W1<W2, and the comparison process based on the vibration amplitude and the preset vibration amplitude W is as follows: If the vibration amplitude is less than or equal to W1, the control unit uses the first extension adjustment coefficient to increase the extension to 1.35 times the initial value; if the vibration amplitude is greater than W1 and less than or equal to W2, the control unit uses the second extension adjustment coefficient to increase the extension to 1.65 times the initial value; if the vibration amplitude is greater than W2, the control unit uses the third extension adjustment coefficient to increase the extension to 2.05 times the initial value. Specifically, in this embodiment, W0 is set to 10 mm, W1=0.8×W0, W2=1.3×W0; it should be noted that W0, W1 and W2 can also be set according to the equipment status and environmental conditions, without specific limitation, and the increase ratio of the extension can also be adjusted accordingly according to the production situation.

[0050] Furthermore, when the adjustment for increasing the extension amount is completed, the analysis unit determines that the belt scale is not operating properly based on the re-comparison result of the cumulative amount difference with the preset cumulative amount difference, and then issues a correction notification for the sensor, wherein the sensor includes a weighing sensor and a speed sensor.

[0051] Specifically, in this embodiment, after the increase adjustment of the extension amount of the telescopic unit is completed, when the analysis unit re-compares the cumulative amount difference with Q0, if the cumulative amount difference is still greater than Q0, it can be determined that the reason for the unqualified operation of the belt scale is not only the height position problem of the weighing unit. At this time, the analysis unit needs to issue a calibration notice for the weighing sensor or speed sensor, and then the control unit completes the calibration of the sensor.

[0052] Furthermore, the analysis unit is also used to redetermine the reason for the unqualified operation of the belt scale based on the comparison result of the variance with the preset variance pre-stored in the analysis unit, and generate a corresponding correction method based on the determined reason, including: increasing the operating power of the drive device, or issuing a correction notification for abnormal sensors, wherein the abnormal sensors include weighing abnormality sensors and speed abnormality sensors.

[0053] Specifically, in this embodiment, the comparison process based on the variance and the preset variance H0 is as follows: If the variance is less than or equal to H0, it can be determined that there is a problem with the conveying speed of the conveying device, resulting in the unqualified operation of the belt scale. The conveying speed of the belt can be adjusted by adjusting the operating power of the driving device.

[0054] If the variance is greater than H0, it can be determined that there is an abnormal sensor, and the abnormal sensor causes inaccurate measurement values. At this time, it is necessary to find the maximum or minimum instantaneous quantity corresponding to the measurement time node based on the time-instantaneous quantity curve, and record this instantaneous quantity as the abnormal instantaneous quantity. Based on the abnormal instantaneous quantity, find the corresponding abnormal sensor. The abnormal sensors include the weighing abnormal sensor and the speed abnormal sensor. Then, the analysis unit issues a correction notice for the abnormal sensor, and the control unit corrects the abnormal sensor. Specifically, in this embodiment, H0 is set to 0.4; it should be noted that H0 can also be adjusted correspondingly according to the production situation.

[0055] Furthermore, the analysis unit is also used to determine to increase the operating power of the driving device based on the comparison result between the cumulative quantity difference ratio and the preset cumulative quantity difference ratio pre-stored in the analysis unit, and the increase amplitude of the operating power is proportional to the cumulative quantity difference ratio, where the cumulative quantity difference ratio is the ratio between the cumulative quantity difference and the preset cumulative quantity difference.

[0056] Specifically, in this embodiment, the cumulative quantity difference is less than or equal to the preset cumulative quantity difference Q0. Therefore, the cumulative quantity difference ratio is less than or equal to 1. The preset cumulative quantity difference ratio P0 includes the first preset cumulative quantity difference ratio P1 and the second preset cumulative quantity difference ratio P2, and P1 < P2. The specific process of comparing the cumulative quantity difference ratio with the preset cumulative quantity difference ratio P0 is as follows: If the cumulative quantity difference ratio is less than or equal to P1, the control unit uses the first power adjustment coefficient to increase the operating power to 2.65 times the initial value. If the cumulative quantity difference ratio is greater than P1 and less than or equal to P2, the control unit uses the second power adjustment coefficient to increase the operating power to 1.95 times the initial value. If the cumulative quantity difference ratio is greater than P2, the control unit uses the third power adjustment coefficient to increase the operating power to 1.45 times the initial value. Specifically, in this embodiment, P0 is set to 0.5, P1 = 0.8×P0, and P2 = 1.3×P0; it should be noted that P0, P1, and P2 can also be adjusted according to the equipment conditions, and the increase multiple of the operating power can also be adjusted correspondingly according to the production situation.

[0057] Further, after the adjustment for increasing the operating power is completed, the analysis unit is further configured to determine the reason for the unqualified operation of the belt scale based on the comparison result between the expected moving speed and the actual moving speed, and generate a corresponding correction method based on the determined reason, including: sending a maintenance notice to the energy supply device, where the expected moving speed is the moving speed determined after adjusting the operating power, and the actual moving speed is the moving speed measured by the speed measuring unit.

[0058] Specifically, in this embodiment, after the adjustment for increasing the operating power of the driving device is completed, the analysis unit can determine an expected moving speed of the belt based on the increased operating power, and the speed measuring unit can measure the actual moving speed of the belt after the adjustment. If the actual moving speed is less than the expected moving speed, it indicates that there is a problem with the current energy supply device in outputting electrical energy, and the analysis unit needs to send a maintenance notice for the energy supply device; if the actual moving speed is greater than the expected moving speed, the increase amplitude of the operating power can be appropriately reduced to ensure the actual moving speed of the belt.

[0059] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0060] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control system for intrinsically safe belt scales used in mines, characterized in that, Including: An energy supply device for providing electric energy; A conveying device, which includes a belt for conveying materials and a driving device for driving the belt to rotate, and the driving device is connected to the energy supply device; A belt scale, which is arranged on the conveying device and includes a weighing unit, a speed measuring unit, a telescopic unit, a conversion unit, an extraction unit, an analysis unit and a control unit; The weighing unit includes a plurality of weighing sensors in contact with the surface of the belt and is used to obtain gravity information based on the belt conveying the materials; The speed measuring unit includes a plurality of speed sensors connected to the belt and is used to obtain speed information based on the belt conveying the materials; The telescopic unit is used to adjust the position height of the weighing unit; The conversion unit is respectively connected to the weighing unit and the speed measuring unit, and is used to obtain a differential pressure signal based on the gravity information and obtain a pulse signal based on the speed information; The extraction unit is connected to the conversion unit and is used to process based on the differential pressure signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity, wherein the cumulative quantity is the sum of a plurality of instantaneous quantities; The analysis unit is connected to the extraction unit and is used to generate a corresponding processing method based on the cumulative quantity, including: outputting the cumulative quantity, or generating a corresponding instruction based on the determined unqualified reason; The control unit is respectively connected to the driving device, the weighing sensor, the speed sensor, the telescopic unit and the analysis unit, and is used to adjust the operating parameters of the corresponding device or unit based on the instruction, and the parameters include: the operating power of the driving device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the determination benchmark of the analysis unit.

2. The control system for intrinsically safe belt scales used in mines according to claim 1, characterized in that, The analysis unit is used to re-determine whether the belt scale operates qualified based on the comparison result of the cumulative quantity and the preset cumulative quantity pre-stored in the analysis unit, or based on the included angle between the conveying device and the plane, and, in the case of determining that the belt scale operates unqualified, determine the unqualified reason based on the cumulative quantity difference, wherein the cumulative quantity difference is the difference between the preset cumulative quantity and the cumulative quantity.

3. The control system for intrinsically safe belt scales for mine use according to claim 2, characterized in that, The analysis unit is also used to re-determine that the belt scale operates unqualified based on the comparison result of the included angle and the preset included angle range pre-stored in the analysis unit, or reduce the determination benchmark of the analysis unit based on the angle difference, wherein the angle difference is the absolute value of the difference between the included angle and the preset included angle range.

4. The control system for the intrinsically safe belt scale for mine use according to claim 3, characterized in that, The analysis unit is also used to reduce the preset cumulative quantity based on the comparison result of the angle difference and the preset angle difference pre-stored in the analysis unit, and the reduction amplitude of the preset cumulative quantity is proportional to the angle difference.

5. The control system for the intrinsically safe belt scale for mine use according to claim 2, wherein, The analysis unit is also used to determine the reason for the unqualified operation of the belt scale based on the comparison result of the cumulative quantity difference and the preset cumulative quantity difference pre-stored in the analysis unit, and generate a corresponding correction method based on the determined reason, including: increasing the extension amount of the telescopic unit, or re-determining the unqualified reason based on the variance, wherein the variance is calculated from a plurality of measurement time nodes and the corresponding plurality of instantaneous quantities within a single measurement period.

6. The control system for intrinsically safe belt scales for mine use according to claim 5, characterized in that, The analysis unit is also used to increase the extension amount of the telescopic unit based on the comparison result of the vibration amplitude and the preset vibration amplitude pre-stored in the analysis unit, and the increase amplitude of the extension amount is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

7. The control system for intrinsically safe belt scales for mine use according to claim 6, characterized in that, When the adjustment for increasing the extension amount is completed, the analysis unit determines that the belt scale is unqualified based on the re-comparison result of the cumulative amount difference with the preset cumulative amount difference, and then issues a correction notice for the sensor, wherein the sensor includes a weighing sensor and a speed sensor.

8. The control system for intrinsically safe belt scales for mine use according to claim 5, characterized in that, The analysis unit is also used to redetermine the reason for the unqualified operation of the belt scale based on the comparison result of the variance with the preset variance pre-stored in the analysis unit, and generate a corresponding correction method based on the determined reason, including: increasing the operating power of the drive device, or issuing a correction notification for abnormal sensors, wherein the abnormal sensors include weighing abnormality sensors and speed abnormality sensors.

9. The control system for intrinsically safe belt scales for mine use according to claim 8, characterized in that, The analysis unit is also used to determine whether to increase the operating power of the drive device based on a comparison result of the cumulative amount difference ratio with a preset cumulative amount difference ratio pre-stored in the analysis unit, and the increase in the operating power is proportional to the cumulative amount difference ratio, wherein the cumulative amount difference ratio is the ratio between the cumulative amount difference and the preset cumulative amount difference.

10. The control system for intrinsically safe belt scales for mining use according to claim 9, characterized in that, When the adjustment for increasing the operating power is completed, the analysis unit is also used to determine the reason for the unqualified operation of the belt scale based on the comparison result of the expected moving speed and the actual moving speed, and generate a corresponding correction method based on the determined reason, including: issuing a maintenance notice for the power supply device, wherein the expected moving speed is the moving speed determined after adjusting the operating power, and the actual moving speed is the moving speed measured by the speed measuring unit.

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