Intelligent measuring method and measuring system for liquid level of water sump of strip mine pit

Abstract

The invention discloses an intelligent measuring method and system for the liquid level of a water sump of an open pit. The measuring method comprises the steps that a satellite positioning unit obtains the dynamic position of a liquid level observation opening of a pontoon in the water sump of the open pit and dynamic elevation data Pi of the dynamic position according to a certain periodicity; the radar unit obtains the distance Di from the observation port of the pontoon in the water sump of the strip mine pit to the liquid level at each moment according to a certain periodicity; and inputting the measured dynamic position and the dynamic elevation Pi of the floating pontoon liquid level observation port, the obtained distance Di at each moment and the fixed height difference H2 between the radar system and the satellite positioning system into a data model for processing, and finally obtaining the liquid level data of the water sump of the strip mine pit. According to the invention, the floating pontoon unit, the satellite positioning unit and the radar unit are combined for distance measurement, the real-time online measurement of the liquid level of the water sump is realized, the influence of the liquid on monitoring equipment is reduced or eliminated without contacting the monitoring liquid, the measurement precision is greatly improved, and the stability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of mine measurement, and in particular relates to an intelligent measurement method and a measurement system for a water tank level in an open-pit mine. Background Art

[0002] During the open-pit mining process, affected by rainwater, underground water, etc., water tanks and other projects will be set up. During the flood season, water pumps are used to pump and drain to lower the water tank level to meet daily production needs. Especially during the flood season, the fluctuation of the liquid level is directly related to the production and safety of the mine unit. It is necessary to calculate the flood control of the mine unit during the flood season. By mastering the relationship between the volume of the open-pit mine water tank, water volume, drainage, rainfall and water pumping capacity, it is possible to calculate whether it meets the needs of safe production, and to obtain indicators such as warning water level, guaranteed water level and defense water level. In addition, the liquid level changes are continuously mastered during the flood season, and sufficient preparations and guidance are made for emergency arrangements during the flood season. However, during the mining period of open-pit mines, water gushing and water confluence carry sand, pass through the ore veins, and the water quality is acidic. The general liquid level measurement method has unsatisfactory on-site installation conditions, and the liquid level measurement continuity, stability and durability are relatively poor.

[0003] The traditional liquid level measurement method is to set up scales at certain heights on the ramp during pit construction, and convert the liquid level through the scale readings and step elevations. This method is suitable for short-term, especially for liquid level measurement during or shortly after pit construction, and requires personnel to read on-site regularly. Once the pit liquid level changes rapidly or is impacted by silt and other factors, the scale is easy to topple over, and the scale is easily contaminated and discolored by turbid acidic water, affecting the acquisition of liquid level data.

[0004] Common liquid level measurement methods such as infrared in water conservancy projects are not suitable for installation on site because the liquid level in the pit drops quickly and the liquid level shrinkage is generally 14m. Another common measurement method is the immersion level meter, but it is affected by the water quality of the mine, and there are also problems such as large data errors and frequent calibration, making the measurement unsustainable and stable. Summary of the invention

[0005] The invention discloses an open-pit mine water tank liquid level intelligent measurement method and measurement system to solve any of the above and other potential problems in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an intelligent measurement method for the liquid level of a water tank in an open-pit mine, the measurement method specifically comprises the following steps:

[0007] S1) The satellite positioning unit obtains the dynamic position and dynamic elevation data of the floating ship liquid level observation port in the open pit water tank according to a certain periodicity P i ;

[0008] S2) The radar unit obtains the distance D at each moment from the floating ship observation port to the liquid level in the open-pit mine sump according to a certain periodicity. i ;

[0009] S3) The measured dynamic position of the floating ship liquid level observation port and its dynamic elevation P obtained through S1) i and the distance D at each moment obtained through S2) i , as well as the fixed height difference H2 between the radar system and the satellite positioning system, are all input into the data model for processing, and finally the liquid level data of the open-pit mine sump is obtained.

[0010] Furthermore, the periodicity in S1) and S2) is 15 seconds to 5 minutes.

[0011] Furthermore, the specific steps of S3) are as follows:

[0012] S3.1) The dynamic elevation data obtained by the satellite positioning unit within the T i cycle: P1,

[0013] P2,..., P i , are calculated to obtain the moving average SMA i within the T G1 cycle, and the formula is as follows:

[0014] SMA G1 =(P1 + P2 +... + P i ) / m;

[0015] In the formula, m is the number of dynamic elevation data obtained within the T i cycle, and the value range is a positive integer greater than 0;

[0016] S3.2) The distance at each moment obtained by the radar unit within the T i cycle is D1,

[0017] D2,..., D i , are calculated to obtain the SMA i within the T D1，公式如下 cycle:

[0018] SMA D1 =(D1 + D2 +... + D n ) / n;

[0019] In the formula, n is the number of distances at each moment obtained within the T i cycle, and the value range is a positive integer greater than 0;

[0020] S3.3) Add the result obtained in S3.1) and the result obtained in S3.2) and the fixed height difference H2 between the radar system and the satellite positioning system, and the result within the T can be obtained.i The liquid level value within the period is as follows:

[0021] Y1 = SMA G1 + SMA D1 + H1.

[0022] Another object of the present invention is to provide a measurement system for the intelligent method of the liquid level in an open-pit mine sump, which specifically includes: a satellite positioning unit, a radar unit, a floating ship unit, and a data processing unit;

[0023] Among them, the floating ship unit is arranged in the open-pit mine sump, and is used to install the radar unit and provide a measurement reference surface;

[0024] The satellite positioning unit is used to determine the spatial dynamic absolute position of the floating ship unit in real time and periodically collect position data;

[0025] The radar unit is used to determine the relative distance between the satellite positioning unit and the liquid surface in real time and periodically collect distance data;

[0026] The data processing module is used to process the data collected by the satellite positioning unit and the radar unit and output the results.

[0027] Furthermore, the satellite positioning unit is of the choke antenna type and uses the GPS-RTK real-time kinematic measurement method for positioning.

[0028] The beneficial effects of the present invention are: Due to the above technical solutions, the present invention uses a combined ranging method of the floating ship unit, the satellite positioning unit, and the radar unit to solve the real-time online measurement of the sump liquid level. By not contacting the monitored liquid, it reduces or eliminates the influence of the liquid on the monitoring equipment, and innovatively solves the problems that the measurement accuracy of the dip-type liquid level gauge is weakened due to the influence of water quality, and the dip-type liquid level gauge fails or needs to be adjusted regularly due to the rise of mine pit silt covering. At the same time, radar ranging is introduced to avoid the interference of changes in water quality density, static and dynamic loads on the floating cylinder, and changes in the draft depth of the floating cylinder caused by pipeline traction on the measurement data, greatly improving the measurement accuracy and having high stability. Brief Description of the Drawings

[0029] Figure 1 It is a flow block diagram of an intelligent measurement method for the liquid level in an open-pit mine sump of the present invention.

[0030] Figure 2 It is a structural schematic diagram of an intelligent measurement system for the liquid level in an open-pit mine sump of the present invention. Detailed Embodiments

[0031] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the following describes the embodiments of the present disclosure in detail with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a thorough understanding of the disclosed embodiments. Without these details, one or more embodiments can still be implemented. In other instances, well-known structures and devices are shown in a simplified manner to simplify the drawings.

[0032] The following description and the drawings fully illustrate specific embodiments of the invention so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments of the invention includes the entire scope of the claims and all available equivalents of the claims. In this document, the embodiments may be referred to individually or collectively by the term "invention" for convenience only, and if in fact more than one invention is disclosed, it is not intended to automatically limit the scope of the application to any single invention or inventive concept. In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method or vehicle including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method or vehicle. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method or vehicle including the element. The embodiments in this document are described in a progressive manner, with each embodiment highlighting the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, since they correspond to the method part disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0033] There are mainly two existing techniques for obtaining the liquid level in open-pit mine pits. One is to install a scale in a stepped manner in the traditional way and read the values manually at regular intervals. This method works well in pure liquids, but in the turbid environment of acidic water in the pit, the scale markings will be eroded and covered with sediment, resulting in poor stability and sustainability of obtaining liquid level data.

[0034] Another method is to use a submersible liquid level gauge, which is based on the principle that the hydrostatic pressure of a liquid is proportional to its height. It is made of an advanced isolated diffused silicon sensitive element or a ceramic capacitive pressure sensitive sensor, which converts the hydrostatic pressure into an electrical signal. After temperature compensation and linear correction, it is converted into a standard electrical signal, which is a pressure sensor for measuring liquid level. Although this method has good data persistence, its stability is poor. Since this method is also in direct contact with the liquid, it is easy to cause the surface of the liquid level gauge to be covered with silt. Moreover, the liquid density in the mine pit will change with time, rainfall, etc., resulting in a change in hydrostatic pressure and low measurement accuracy. After the pressure sensing unit is covered, when manual cleaning is carried out and it is reinstalled, the installation position changes compared with the initial position, and the adjustability during measurement is also relatively poor, and the fixed error needs to be redetermined.

[0035] Although non-contact cases such as infrared and radar have been implemented in other water conservancy projects and municipal water tank projects, there are still major problems in installing them in open-pit mine pits. On the one hand, it is difficult to provide good conditions for vertical installation due to the sloping surface of the mine pit; on the other hand, the water storage tanks in the mine pit are all temporary water storage tanks, and the positions of the water storage tanks will change significantly according to production progress within half a year to one year. To solve the problems existing in the related technologies, the embodiments of the present disclosure provide a liquid level measurement method that does not directly contact the liquid. A floating pontoon unit, a satellite positioning unit, and a radar unit are used to solve the problems of sustainability, stability, and durability in the existing open-pit mine pits.

[0036] As Figure 1 shown, an intelligent liquid level measurement method for an open-pit mine water storage tank according to the present invention specifically includes the following steps:

[0037] S1) The satellite positioning unit periodically obtains the dynamic position and dynamic elevation data P of the floating pontoon liquid level observation port in the open-pit mine water storage tank i ;

[0038] S2) The radar unit periodically obtains the distance D at each moment from the floating pontoon observation port to the liquid surface in the open-pit mine water storage tank i ;

[0039] S3) The measured dynamic position and dynamic elevation P of the floating pontoon liquid level observation port obtained through S1) i and the distance D at each moment obtained through S2) i , as well as the fixed height difference H2 between the radar system and the satellite positioning system, are all input into the data model for processing, and finally the liquid level data of the open-pit mine water storage tank is obtained.

[0040] The periodicity in S1) and S2) is 15 seconds to 5 minutes.

[0041] The specific steps of S3) are as follows:

[0042] S3.1) Obtain the dynamic elevation data P1 obtained by the satellite positioning unit within the T i cycle: P1,

[0043] P2,..., P i , and perform calculations to obtain the moving average SMA within the T i cycle, and the formula is as follows: G1

[0044] SMA G1 =(P1 + P2 +... + P i ) / m;

[0045] In the formula, m is the number of dynamic elevation data obtained in the T i cycle, and the value range is a positive integer greater than 0;

[0046] S3.2) For each moment within the T i cycle, the distances obtained by the radar unit are D1,

[0047] D2,..., D i , and perform calculations to obtain the SMA within the T i cycle: D1，公式如下

[0048] SMA D1 =(D1 + D2 +... + D n ) / n;

[0049] In the formula, n is the number of distances at each moment obtained in the T i cycle, and the value range is a positive integer greater than 0;

[0050] S3.3) Add the sum obtained in S3.1) and the sum obtained in S3.2) to the fixed height difference H2 between the radar system and the satellite positioning system to obtain the liquid level value within the T i cycle, and the formula is as follows:

[0051] Y1 = SMA G1 + SMA D1 + H1.

[0052] Example:

[0053] See Figure 2 , this embodiment of the present disclosure provides an intelligent measurement system for the liquid level of an open-pit mine sump, including a floating ship unit, a satellite positioning unit, a radar unit, and a data processing module.

[0054] It should be noted that this application is not applicable to open-pit mines, underground mines, or underground sumps.

[0055] ​​In the embodiments of the present disclosure, the satellite positioning unit uses the GPS-RTK mode instead of the static mode, with a centimeter-level accuracy. In the examples of the present disclosure, the static mode can be used to achieve a millimeter level. It should be understood that to achieve the millimeter level, the satellite receiver (01) needs to continuously observe the satellite ephemeris data for more than 45 minutes, and since the liquid level changes over a long time, it is difficult to calculate a reliable result at the millimeter level. For example, if the liquid level change in a mine sump is regular and the liquid surface fluctuation is small within 1 hour, the static mode can be used.

[0056] The radar unit provided by the embodiments of the present disclosure is for coping with the change in the draft depth of the floating ship unit, and measures and determines the distance between the liquid surface and the radar unit. The radar unit is placed at the water level observation port, and both the receiver and the radar unit are installed on the floating ship installation device. It should be understood that the floating ship unit includes a rain shelter, drainage equipment, pipelines, etc. The start and stop of the water pump equipment will cause a change in the draft depth of the floating ship, and the draft depths in the start and stop states are different. At the same time, when the liquid level drops and rises, the traction force of the pipeline on the floating ship system also changes greatly. Static and dynamic loads such as on-site wind loads and personnel maintenance will all affect the draft depth of the floating ship. At the same time, the liquid level density in the open-pit mine sump also changes, without an obvious pattern, and also interferes with the draft depth. It should be understood that the embodiments of the present disclosure are not limited to a single homogeneous liquid, and a variety of complex liquids are applicable.

[0057] The radar unit provided by the embodiments of the present disclosure is installed inside the structure of the floating ship unit, but is not limited to the inside, and can also be installed externally and independently on a floating ring. In a large floating ship system, it can provide a stable measurement environment and a stable liquid surface measurement target.

[0058] The radar unit provided by the embodiments of the present disclosure is provided with a maintenance port on its installation device on the floating ship unit, which is convenient for equipment maintenance and repair. Another function is to provide an open condition to avoid forming a fully enclosed space, resulting in inconsistent liquid levels inside and outside the floating ship.

[0059] The radar unit provided by the embodiments of the present disclosure calculates the distance from the observation port to the liquid surface through the radar installed at the observation port.

[0060] The data processing model provided by the embodiments of the present disclosure is a mean calculation of the data measured by a satellite positioning system and a radar correction measurement system within a measurement period T. The method is as follows: The satellite positioning unit periodically obtains the dynamic position and dynamic elevation data P of the floating ship liquid level observation port in the open-pit mine sump. i ;

[0061] S2) The radar unit periodically obtains the distance D from the floating ship observation port to the liquid surface at each moment in the open-pit mine sump. i ;

[0062] S3) The measured dynamic position and dynamic elevation P of the floating ship liquid level observation port obtained through S1) i and the distance D at each moment obtained through S2) i , as well as the fixed height difference H2 between the radar system and the satellite positioning system, are all input into the data model for processing, and finally the liquid level data of the open-pit mine sump is obtained.

[0063] The specific steps are as follows:

[0064] S3.1) The dynamic elevation data obtained by the satellite positioning unit within the T i cycle: P1,

[0065] P2,..., P i , are calculated to obtain the moving average SMA i within the T G1 cycle. The formula is as follows:

[0066] SMA G1 =(P1 + P2 +... + P i ) / m;

[0067] In the formula, m is the number of dynamic elevation data obtained within the T i cycle, and the value range is a positive integer greater than 0;

[0068] S3.2) The distance at each moment obtained by the radar unit within the T i cycle is D1,

[0069] D2,..., D i , are calculated to obtain the SMA i within the T D1，公式如下 cycle:

[0070] SMA D1 =(D1 + D2 +... + D n ) / n;

[0071] In the formula, n is the number of distances at each moment obtained within the T i cycle, and the value range is a positive integer greater than 0;

[0072] S3.3) Add the result obtained from S3.1) and the result obtained from S3.2) and the fixed height difference H2 between the radar system and the satellite positioning system to obtain the liquid level value within the T i cycle. The formula is as follows:

[0073] Y1 = SMA G1 + SMA D1 + H1.

[0074] When within the cycle T iIf positioning data cannot be collected within a cycle, there is no liquid level data for that cycle. Similarly, if radar correction data cannot be collected, there is no liquid level data for that cycle.

[0075] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments merely represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, or vehicle including the element. Herein, what each embodiment focuses on can be the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts can refer to the description of the method parts.

[0076] Those skilled in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner can depend on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the devices, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0077] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of code, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. In the description corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based device that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An intelligent measurement method for the water level in an open-pit mine sump, characterized in that, The measurement method specifically includes the following steps: S1) The satellite positioning unit obtains the dynamic position and dynamic elevation data P of the floating ship liquid level observation port in the open-pit mine sump at a certain periodicity i ; S2) The radar unit acquires the distance D at each moment from the floating ship observation port to the liquid level in the open-pit mine sump according to a certain periodicity i ; S3) The measured dynamic position of the floating ship liquid level observation port and its dynamic elevation P obtained through S1) i and the distance D at each moment obtained through S2) i , as well as the fixed height difference H2 between the radar system and the satellite positioning system, are all input into the data model for processing, and finally the liquid level data of the open-pit mine sump is obtained.

2. The measuring method according to claim 1, characterized in that, The periodicity in S1) and S2) is 15 seconds to 5 minutes.

3. The measurement method according to claim 1, characterized in that The specific steps of S3) are as follows: S3.1) The dynamic elevation data obtained by the satellite positioning unit within the T i cycle: P1, P2,..., P i , is calculated to obtain the moving average SMA i within the T G1 cycle. The formula is as follows: SMA G1 =(P1 + P2 + … + P i ) / m; Where m is T i The number of acquired dynamic elevation data obtained in the cycle, and the value range is a positive integer greater than 0; S3.2) The distances at each moment obtained by the radar unit within the T i cycle are D1, D2, …, D i , and after calculation, the SMA i within the T D1，公式如下 cycle is obtained as follows: SMA D1 =(D1 + D2 + … + D n ) / n; Where n is the number of distances at each moment obtained in the T i cycle, and the value range is a positive integer greater than 0; S3.3) Add the sum obtained in S3.1) and the fixed height difference H2 between the radar system and the satellite positioning system obtained in S3.2), and the liquid level value within the T i cycle can be obtained. The formula is as follows: Y1 = SMA G1 + SMA D1 + H1。 4. An intelligent measurement system for the water level in the sump of an open-pit mine, characterized in that, The measurement system specifically includes: a satellite positioning unit, a radar unit, a floating ship unit, and a data processing unit; Among them, the floating ship unit is arranged in the open-pit mine sump, used to install the radar unit and provide a measurement reference surface; The satellite positioning unit is used to determine the spatial dynamic absolute position of the floating ship unit in real time and periodically collect position data; The radar unit is used to determine the relative distance between the satellite positioning unit and the liquid surface in real time and periodically collect distance data; The data processing module is used to process the data collected by the satellite positioning unit and the radar unit and output the results.

5. The measurement system according to claim 4, wherein, The satellite positioning unit is of the choke antenna type and uses the GPS-RTK real-time kinematic measurement method for positioning.

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