A control system for intrinsically safe belt scales used in mines

Abstract

The present invention relates to the technical field of weighing equipment, and in particular to a control system for an intrinsically safe belt scale for mining. 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 system obtains gravity information and speed information through a weighing unit and a testing unit in the belt scale, respectively. A conversion unit then processes the gravity information and speed information to obtain a pressure difference signal and a pulse signal. An extraction unit then processes the pressure difference signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity. An analysis unit determines whether the belt scale's operation within the current measurement cycle is qualified based on the calculated cumulative quantity. If qualified, the cumulative quantity is output; if unqualified, the cause is determined and a corresponding correction instruction is generated. A control unit adjusts the operating parameters of the corresponding device or unit based on the instruction. By adjusting the operating parameters, the system achieves self-regulation, thereby improving the measurement accuracy of the belt scale for materials in the system.

Description

Technical Field

[0001] The present invention relates to the technical field of weighing equipment, in particular to a control system for an intrinsically safe belt scale for mining. Background Art

[0002] The intrinsically safe belt scale can adapt to harsh environments such as coal mines and is used to weigh materials on belt conveyors. It collects pressure difference signals and pulse signals during material transportation through the provided weighing sensors and speed sensors, and calculates the instantaneous and cumulative amounts of the materials through real-time integration of the pressure difference signals and pulse signals. It can thus perform continuous dynamic measurement of solid materials and realize statistics and control of material flow.

[0003] Prior art Chinese patent publication number CN114593796A discloses a belt-type weighing scale control system. The system includes a belt conveyor, a gravity sensor and a speed sensor installed inside the conveyor, and a camera recognition module. A communication module collects relevant information and transmits it to a control center module. The control center module then calculates the operating status of the conveyed object, material measurement, and accumulated work based on the received information, displays the belt scale status information, and stores actual operating data. However, the current system only measures material measurement and accumulated work, and the technical solution does not include a method for adjusting the system's operating parameters based on the measured data to improve the belt scale's measurement accuracy. Summary of the Invention

[0004] To this end, the present invention provides a control system for a mine intrinsically safe belt scale to solve the problem in the prior art that the operating status of the belt scale is not determined based on the accumulated amount and the system is adjusted based on this, thereby improving the measurement accuracy of the belt scale.

[0005] To achieve the above object, the present invention provides a control system for a mining intrinsically safe belt scale, comprising:

[0006] Energy supply device for providing electrical energy;

[0007] A conveying device, comprising 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;

[0008] 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;

[0009] The weighing unit includes a plurality of weighing sensors in contact with the surface of the belt and used to obtain gravity information when the belt transports the material;

[0010] The speed measuring unit includes a plurality of speed sensors connected to the belt and used to obtain speed information when the belt conveys the material;

[0011] The telescopic unit is used to adjust the position height of the weighing unit;

[0012] The conversion unit is connected to the weighing unit and the speed measuring unit respectively, and is used to obtain a pressure difference signal based on the gravity information and a pulse signal based on the speed information;

[0013] The extraction unit is connected to the conversion unit and is used to process the pressure difference signal and the pulse signal to obtain an instantaneous value and a cumulative value, wherein the cumulative value is the sum of several instantaneous values;

[0014] The analysis unit is connected to the extraction unit and is used to generate a corresponding processing method based on the cumulative amount, including: outputting the cumulative amount, or generating a corresponding instruction based on the determined non-conformity reason;

[0015] 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 instructions. 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 judgment basis of the analysis unit.

[0016] Furthermore, the analysis unit is used to re-determine whether the operation of the belt scale is qualified based on the comparison result of the cumulative amount with the preset cumulative amount pre-stored in the analysis unit, or based on the angle between the conveying device and the plane, and to determine the reason for the failure based on the cumulative amount difference when it is determined that the operation of the belt scale is unqualified, wherein the cumulative amount difference is the difference between the preset cumulative amount and the cumulative amount.

[0017] Furthermore, the analysis unit is also used to re-judge whether the belt scale is operating unqualified based on the comparison result of the angle and the preset angle range pre-stored in the analysis unit, or to lower the judgment basis 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.

[0018] Furthermore, the analysis unit is further configured to reduce the preset cumulative amount based on a comparison result of the angle difference with a preset angle difference pre-stored in the analysis unit, and a reduction range of the preset cumulative amount is proportional to the angle difference.

[0019] Furthermore, 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 amount difference and the preset cumulative amount difference pre-stored in the analysis unit, and to generate a corresponding correction method based on the determined reason, including: increasing the extension amount of the telescopic unit, or redetermining the reason for the unqualified operation based on the variance, wherein the variance is calculated by several measurement time nodes and the corresponding several instantaneous quantities in a single measurement cycle.

[0020] Furthermore, the analysis unit is also used to increase the extension 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 is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

[0021] Furthermore, 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 and 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.

[0022] 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 and 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 the abnormal sensor, wherein the abnormal sensor includes a weighing abnormality sensor and a speed abnormality sensor.

[0023] Furthermore, 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 and 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.

[0024] 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 movement speed and the actual movement 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 movement speed is the movement speed determined after adjusting the operating power, and the actual movement speed is the movement speed measured by the speed measuring unit.

[0025] Compared with the prior art, the control system of the present invention for a mining intrinsically safe belt scale has the beneficial effect that the system includes a conveying device for conveying materials, a power supply device for supplying power 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, and the gravity information and speed information are respectively obtained by the weighing unit and the test unit, and then the conversion unit processes the gravity information and the speed information to obtain a pressure difference signal and a pulse signal, and then the extraction unit processes the pressure difference signal and the pulse signal to obtain an instantaneous amount and a cumulative amount, and the analysis unit determines whether the operation of the belt scale in the current measurement cycle is qualified based on the measured cumulative amount, and outputs the cumulative amount if qualified, and determines the cause and generates a corresponding correction instruction if unqualified, and the control unit adjusts the operating parameters of the corresponding device or unit based on the instruction, and the parameters include: the operating power of the drive device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the judgment basis of the analysis unit; by adjusting the operating parameters, the system is self-regulated, thereby improving the measurement accuracy of the belt scale for materials in the system.

[0026] Furthermore, the present invention determines whether the operation of the belt scale is qualified by comparing the cumulative amount with the preset cumulative amount, and can determine the cause based on the difference in the cumulative amount, so as to timely correct the operating parameters in the system to improve the qualified rate of the belt scale operation.

[0027] Furthermore, the present invention also re-determines whether the belt scale operation is unqualified by comparing the angle between the conveying device and the plane with the preset angle range, or adjusts the judgment basis of the analysis unit based on the angle difference. Through the secondary judgment, the accuracy of the system's judgment on the operating status of the belt scale is improved, making the judgment result on the operating status of the belt scale more accurate.

[0028] Furthermore, the present invention also reduces the judgment criterion of the analysis unit based on the comparison result of the angle difference value and the preset angle difference value, that is, reduces the preset cumulative amount to increase the qualified rate of the belt scale operation.

[0029] Furthermore, the present invention also determines the reason for the unqualified operation of the belt scale based on the comparison result of the cumulative amount difference and the preset cumulative amount difference, and generates a corresponding correction method based on the reason, including: adjusting the extension amount of the telescopic unit to improve the operation qualification rate of the belt scale, or redetermining the reason for the unqualified operation of the belt scale based on the variance.

[0030] 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 measuring position of the weighing unit so that the weighing unit can better contact the belt surface, thereby being able to measure the weight of the material more stably, reducing other factors affecting the operation of the belt scale, and increasing the qualified rate of the belt scale operation.

[0031] Furthermore, after completing the adjustment of the extension amount of the telescopic unit, the present invention can issue a correction notice to the sensor when it is determined again that the belt scale is operating unqualified based on the comparison result of the cumulative amount difference and the preset cumulative amount difference. By correcting the sensor, the factors affecting the operation of the belt scale can be reduced, thereby improving the measurement accuracy of the belt scale.

[0032] Furthermore, the present invention also generates a corresponding correction method based on the comparison result of the variance and the preset variance: increasing the operating power of the drive device, or issuing a correction notice for the abnormal sensor, thereby improving the probability of the belt scale operating properly by correcting the system.

[0033] Furthermore, the present invention also determines to increase the operating power of the driving device based on the cumulative amount difference ratio and the preset cumulative amount difference ratio, thereby increasing the speed of the belt, thereby increasing the probability of the belt scale operating qualifiedly.

[0034] Furthermore, after completing the adjustment of the operating power of the driving device, the present invention re-verifies that the belt scale is still unqualified based on the comparison result of the expected movement speed and the actual movement speed, and issues a maintenance notice for the energy supply device to solve the movement speed problem, thereby increasing the probability of the belt scale operating qualifiedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a module schematic diagram of a control system for an intrinsically safe belt scale for mining according to the present invention;

[0036] Figure 2 This is a flow chart of a control system for a mine intrinsically safe belt scale according to the present invention;

[0037] Figure 3 This is a flow chart of determining whether a belt scale operation process is qualified based on cumulative amount according to the present invention;

[0038] Figure 4 The present invention is a flow chart of determining the cause of belt scale process failure and its correction based on the cumulative amount difference. DETAILED DESCRIPTION

[0039] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0040] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0041] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the 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. Therefore, it cannot be understood as a limitation on the present invention.

[0042] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] This embodiment provides a control system for an intrinsically safe belt scale for mining. This system can quickly and accurately measure instantaneous and cumulative quantities (both referring to the weight of materials such as ore) in mining locations, such as mines, and is suitable for use in flammable and explosive environments. By adjusting operating parameters based on the determined results, the system possesses self-learning capabilities, thereby enhancing its data processing and self-improvement capabilities and improving the belt scale's measurement accuracy.

[0044] See also Figure 1 As shown in FIG, it is a module diagram of the control system for a mine intrinsically safe belt scale in this embodiment. The system includes:

[0045] An energy supply device for providing electrical energy; a conveying device comprising 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; a belt scale arranged on the conveying device, comprising 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 comprises a plurality of weighing sensors in contact with the surface of the belt and used to obtain gravity information based on when the belt conveys the materials; the speed measuring unit comprises a plurality of speed sensors connected to the belt and used to obtain speed information based on 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 to obtain pressure difference information based on the gravity information signal and a pulse signal based on the speed information; the extraction unit is connected to the conversion unit, and is used to process the pressure difference signal and the pulse signal to obtain an instantaneous quantity and a cumulative quantity, wherein the cumulative quantity is the sum of several 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 reason for non-conformity; the control unit is respectively connected to the drive 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 drive device, the extension amount of the telescopic unit, the calibration of the weighing sensor or the speed sensor, and the judgment criterion of the analysis unit.

[0046] Specifically, in this embodiment, the energy supply device can be a generator or power cable, which provides power to the electrical devices in the system to ensure normal operation of the system. The conveying device includes a belt and a drive device connected to the belt. The energy supply device, which is connected to the drive device, drives the belt to rotate, and the belt rotates, moving the material along with it. In this embodiment, the material is ore, and the drive device is a drive motor.

[0047] The belt scale continuously weighs the material transported on the conveying device. In this embodiment, the belt scale is arranged on the conveying device, which 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 carries the material through a position, several weighing sensors in the weighing unit can contact the belt surface to obtain gravity information, and the gravity information is proportional to the pressure information generated when the material presses down on the belt. The speed information can also be obtained through several speed sensors when the speed unit is connected to the conveying device. The speed information is proportional to the movement speed information when the belt transports the material; 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 gravity information and speed information generated at a certain moment are obtained by the conversion unit connected to the weighing unit and the speed measuring unit, and then the gravity information is processed to obtain a pressure difference signal, and the speed information is processed to obtain a pulse signal; the converted pressure difference is obtained by the extraction unit connected to the conversion unit Signal and pulse signal, then the pressure difference signal and the pulse signal are integrated to obtain instantaneous quantity and cumulative quantity, the instantaneous quantity refers to the amount of material flowing through the belt scale at a certain moment, the instantaneous quantity changes in real time, and reflects the real-time production capacity of the production line, the cumulative quantity refers to the cumulative value of the total amount of material passing through the belt scale in 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 cumulative quantity is obtained through the analysis unit connected to the extraction unit, and whether the operating status of the belt scale is qualified is determined based on the cumulative quantity, and the corresponding processing method is determined based on the judgment result, including: outputting the cumulative quantity, or generating a corresponding instruction based on the determined reason for non-compliance; the instruction is obtained through the control unit connected to the analysis unit, and the operating parameters of the corresponding device or unit connected to the control unit are adjusted through the instruction, the parameters including: the operating power of the sub-drive device, the extension amount of the telescopic unit, the calibration of the weighing sensor or speed sensor, and the judgment basis of the analysis unit. The present invention provides a belt scale control system with a certain degree of self-learning capability, enabling the system to determine whether the belt scale's operating status is acceptable based on the comparison results of the accumulated quantities and to adjust the operating parameters of the corresponding units in the system according to instructions. This, in turn, improves the belt scale's measurement accuracy and real-time processing capabilities, thereby more accurately detecting and controlling material flow in production. In this embodiment, the load cell is a resistive strain gauge sensor; in other embodiments, the load cell may also be an analog sensor or a digital sensor.

[0048] See also Figure 2 The figure shows the process flow of the control system for a mine intrinsically safe belt scale. The process includes:

[0049] S11: Obtaining gravity information when conveying materials based on a belt.

[0050] S12: Obtain speed information when conveying materials based on a belt.

[0051] S2: Acquire a pressure difference signal based on the gravity information and acquire a pulse signal based on the speed information.

[0052] S3: Integrate the pressure difference signal and the pulse signal to obtain the instantaneous value and the cumulative value.

[0053] S4: generating a corresponding processing method based on the cumulative amount, including: outputting the cumulative amount, or generating a corresponding instruction based on the determined non-conforming reason.

[0054] S5: 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 sensor or speed sensor, and the judgment criterion of the analysis unit.

[0055] See also Figure 3 FIG. 1 is a flow chart illustrating a method for determining whether a belt scale operation is qualified based on cumulative amount in this embodiment. The analysis unit is configured to re-determine whether the belt scale operation is qualified based on a comparison result of the cumulative amount with a preset cumulative amount stored in the analysis unit, or based on the angle between the conveyor device and the plane. Furthermore, if the belt scale operation is determined to be unqualified, the cause of the unqualified operation is determined based on a cumulative amount difference, where the cumulative amount difference is the difference between the preset cumulative amount and the cumulative amount.

[0056] Specifically, in this embodiment, the preset cumulative amount G0 includes a first preset cumulative amount G1 and a second preset cumulative amount G2, G1<G1, and the comparison process based on the cumulative amount and the preset cumulative amount G0 is as follows:

[0057] If the cumulative amount is less than or equal to G1, it means that the operation of the belt scale in the current measurement cycle is unqualified. The reason for the failure of the belt scale needs to be found based on the cumulative amount difference, where the cumulative amount difference is specifically the difference between the first preset cumulative amount G1 and the cumulative amount. If the cumulative amount is greater than G1 and less than or equal to G2, the operating status of the belt scale cannot be accurately determined. In this case, a new determination can be made based on the angle between the conveyor device and the plane. The accuracy of the determination result can be improved through the second determination. The plane at this location can be the ground used to install the conveyor device. If the cumulative amount is greater than G2, it means that the operation of the belt scale in the current measurement cycle is qualified. Specifically, in this embodiment, the preset cumulative amount G0 is set to 10 tons, G1=0.95×G, and the second preset cumulative amount G2=1.03×G. It should be noted that the settings of G1 and G2 can be set according to the production situation. G1 and G2 are the determination criteria of the analysis unit.

[0058] Furthermore, the analysis unit is also used to re-judge whether the belt scale is operating unqualified based on the comparison result of the angle and the preset angle range pre-stored in the analysis unit, or to lower the judgment basis 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.

[0059] Specifically, in this embodiment, the angle between the conveying device and the plane is the angle between the belt and the plane. Generally speaking, the angle between the belt and the ground in a belt conveyor used to transport ore is generally between 10° and 20°. Therefore, a preset angle range of [10°, 20°] can be determined. If the angle exceeds the preset angle range, it means that the belt setting is unreasonable. The specific process of comparing the angle with the preset angle range is as follows:

[0060] If the angle is greater than or equal to 10° and less than or equal to 20°, that is, the angle is within the preset angle range, then the current belt placement is reasonable. If the cumulative amount is greater than the first preset cumulative amount G1 and less than or equal to the second preset cumulative amount G2, the belt scale operation can be determined to be unqualified. If the angle is less than 10° or greater than 20°, then the current belt placement is unreasonable. Therefore, if the cumulative amount is greater than G1 and less than or equal to G2, the analysis unit's judgment basis, that is, the preset cumulative amount G0, can be corrected and reduced based on the angle difference value. The angle difference value is the absolute value of the difference between the angle and the preset angle range.

[0061] Furthermore, the analysis unit is further configured to reduce the preset cumulative amount based on a comparison result of the angle difference with a preset angle difference pre-stored in the analysis unit, and a reduction range of the preset cumulative amount is proportional to the angle difference.

[0062] 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 comparison result between the angle difference and the preset angle difference is as follows:

[0063] 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, 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 rate of G0 can also be adjusted according to production conditions.

[0064] See also Figure 4 The figure shows a flow chart of determining the cause of belt scale process failure and correcting it based on the cumulative amount difference in this embodiment. The analysis unit is further configured to determine the cause of the belt scale failure based on a comparison result of the cumulative amount difference with a preset cumulative amount difference 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, where the variance is calculated from a number of measurement time nodes and the corresponding number of instantaneous quantities within a single measurement cycle.

[0065] 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 that the corresponding correction method can be found. The specific comparison process is as follows:

[0066] If the cumulative difference is less than or equal to Q0, then the cumulative difference is within a reasonable range and the cause of the belt scale's failure cannot be accurately determined. The cause needs to be re-determined based on the variance. A time-instantaneous quantity curve is constructed for several measurement time nodes and corresponding instantaneous quantities within a single measurement cycle, and the variance is calculated based on this curve. The cause of the belt scale's failure is then re-determined based on the variance. If the cumulative difference is greater than Q0, then there is a problem with the current belt scale environment. Due to the high vibration in both the environment and the conveyor, 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 by a vibration monitor on the conveyor and the vibration signal is sent to an analysis unit. The analysis unit analyzes the vibration signal, generates an instruction, and sends the instruction to a control unit. The control unit adjusts the extension of the telescopic unit, specifically the telescopic height of the telescopic unit, to adjust the height position of the weighing unit, thereby ensuring 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.

[0067] Furthermore, the analysis unit is also used to increase the extension 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 is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

[0068] Specifically, in this embodiment, the extension amount of the telescopic unit is adjusted by the size of the vibration amplitude, and thus 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 correspondingly increase the height of the weighing unit to ensure that the weighing unit can also contact the belt when the belt fluctuates too much, thereby effectively measuring the material weight; 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:

[0069] 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, and W2 = 1.3 × W0. It should be noted that W0, W1, and W2 can also be set based on equipment conditions and environmental conditions, and are not specifically limited. The extension increase ratio can also be adjusted accordingly based on production conditions.

[0070] Furthermore, 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 and 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.

[0071] 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 correction notice for the weighing sensor or speed sensor, and then the control unit completes the correction of the sensor.

[0072] 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 and 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 the abnormal sensor, wherein the abnormal sensor includes a weighing abnormality sensor and a speed abnormality sensor.

[0073] Specifically, in this embodiment, the comparison process based on the variance and the preset variance H0 is as follows:

[0074] 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, which causes the belt scale to operate unqualified. The conveying speed of the belt can be adjusted by adjusting the operating power of the drive device.

[0075] If the variance is greater than H0, it can be determined that a sensor is abnormal, resulting in inaccurate measurements. In this case, the maximum or minimum instantaneous quantity corresponding to the measurement time node is identified based on the time-instantaneous quantity curve. This instantaneous quantity is recorded as the abnormal instantaneous quantity. Based on the abnormal instantaneous quantity, the corresponding abnormal sensor is identified. Abnormal sensors include abnormal weighing sensors and abnormal speed sensors. The analysis unit then 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 accordingly based on production conditions.

[0076] Furthermore, 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 and 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.

[0077] Specifically, in this embodiment, the cumulative amount difference is less than or equal to the preset cumulative amount difference Q0. Therefore, the cumulative amount difference ratio is less than or equal to 1. The preset cumulative amount difference ratio P0 includes a first preset cumulative amount difference ratio P1 and a second preset cumulative amount difference ratio P2. P1<P2. The comparison process based on the cumulative amount difference ratio and the preset cumulative amount difference ratio P0 is as follows:

[0078] If the cumulative amount difference ratio is less than or equal to P1, the operating power is increased to 2.65 times the initial value by using the first power adjustment coefficient through the control unit. If the cumulative amount difference ratio is greater than P1 and less than or equal to P2, the operating power is increased to 1.95 times the initial value by using the second power adjustment coefficient through the control unit. If the cumulative amount difference ratio is greater than P2, the operating power is increased to 1.45 times the initial value by using the third power adjustment coefficient through the control unit. 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 status, and the increase rate of the operating power can also be adjusted accordingly according to the production situation.

[0079] 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 movement speed and the actual movement 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 movement speed is the movement speed determined after adjusting the operating power, and the actual movement speed is the movement speed measured by the speed measuring unit.

[0080] Specifically, in this embodiment, after the operating power increase adjustment 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 is completed. If the actual moving speed is less than the expected moving speed, it means that the current energy supply device has a problem in outputting electrical energy, and the analysis unit needs to issue a maintenance notice for the energy supply device; if the actual moving speed is greater than the expected moving speed, the increase in the operating power can be appropriately reduced to ensure the actual moving speed of the belt.

[0081] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0082] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A control system for a mining intrinsically safe belt scale, characterized in that: include: Energy supply device for providing electrical energy; A conveying device, comprising 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; 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 used to obtain gravity information when the belt transports the material; The speed measuring unit includes a plurality of speed sensors connected to the belt and used to obtain speed information when the belt conveys the material; The telescopic unit is used to adjust the position height of the weighing unit; The conversion unit is connected to the weighing unit and the speed measuring unit respectively, and is used to obtain a pressure difference signal based on the gravity information and a pulse signal based on the speed information; The extraction unit is connected to the conversion unit and is used to process the pressure difference signal and the pulse signal to obtain an instantaneous value and a cumulative value, wherein the cumulative value is the sum of several instantaneous values; The analysis unit is connected to the extraction unit and is used to determine whether the operation of the belt scale in the current measurement cycle is qualified based on the comparison result of the cumulative amount and the preset cumulative amount pre-stored in the analysis unit, or to re-determine whether the operation of the belt scale is qualified based on the angle between the conveying device and the plane; The analysis unit generates a corresponding processing method based on the determination result, including: outputting the cumulative amount if it is determined that the operation of the belt scale is qualified, or, if it is determined that the operation of the belt scale is unqualified, determining the reason for the unqualified according to the cumulative amount difference and generating a corresponding instruction, wherein the cumulative amount difference is the difference between the preset cumulative amount and the cumulative amount; 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 instructions. The parameters include: increasing the operating power of the driving device, increasing the extension amount of the telescopic unit, issuing a correction notification for the weighing sensor or the speed sensor, and lowering the judgment criterion of the analysis unit.

2. The control system for a mining intrinsically safe belt scale according to claim 1, characterized in that: The analysis unit is also used to re-judge whether the belt scale is operating unqualified based on the comparison result of the angle with the preset angle range pre-stored in the analysis unit, or to lower the judgment basis 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.

3. The control system for a mining intrinsically safe belt scale according to claim 2, characterized in that: The analysis unit is further configured to reduce the preset cumulative amount based on a comparison result of the angle difference with a preset angle difference pre-stored in the analysis unit, and a reduction range of the preset cumulative amount is proportional to the angle difference.

4. The control system for a mining intrinsically safe belt scale according to claim 1, characterized in that: 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 amount difference and the preset cumulative amount difference pre-stored in the analysis unit, and to generate a corresponding correction method based on the determined reason, including: increasing the extension amount of the telescopic unit, or redetermining the reason for the unqualified operation based on the variance, wherein the variance is calculated by several measurement time nodes and the corresponding several instantaneous quantities in a single measurement cycle.

5. The control system for a mining intrinsically safe belt scale according to claim 4, characterized in that: The analysis unit is also used to increase the extension 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 is positively correlated with the vibration amplitude, wherein the vibration amplitude is the range of up and down shaking of the belt during transportation.

6. The control system for a mining intrinsically safe belt scale according to claim 5, 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 and 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.

7. The control system for a mine intrinsically safe belt scale according to claim 4, 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 notice for the abnormal sensor, wherein the abnormal sensor includes a weighing abnormality sensor and a speed abnormality sensor.

8. The control system for a mining intrinsically safe belt scale according to claim 7, characterized in that: The analysis unit is further used to determine, based on a comparison result of the cumulative amount difference ratio and a preset cumulative amount difference ratio pre-stored in the analysis unit, to increase the operating power of the drive device, 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.

9. The control system for a mining intrinsically safe belt scale according to claim 8, 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 movement speed and the actual movement 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 movement speed is the movement speed determined after adjusting the operating power, and the actual movement speed is the movement speed measured by the speed measuring unit.

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