A flow-in-laser measuring device in a borehole

Abstract

The utility model discloses a kind of flow direction laser measuring devices in borehole, including upper device, lower device and collector;Upper device includes upper disc, upper disc glass cover, photosensitive sensor probe, upper disc electric wire and electronic compass;Upper disc glass cover is fixedly connected in the lower part of upper disc;Photosensitive sensor probe is evenly divided into several groups along the circumference of upper disc;Electronic compass is fixedly embedded in the inside of upper disc, and electronic compass is electrically connected with collector by electronic compass connecting line;Lower device includes lower disc, lower disc glass cover, infrared laser emission head and lower disc electric wire;Lower disc glass cover is fixedly connected in the upper part of lower disc;Infrared laser emission head is evenly divided into several groups along the circumference of lower disc, and the number of photosensitive sensor probe is same and one-to-one vertical correspondence is corresponded with.This utility model realizes the accurate determination of groundwater flow direction under the condition of single borehole microscale weak water power, provides technical support for the field such as groundwater monitoring, ecological environmental protection and mine water disaster prevention.

Description

Technical Field

[0001] This utility model relates to the fields of groundwater monitoring, ecological environmental protection and mine water hazard prevention, and in particular to a laser flow direction measuring device in boreholes. Background Technology

[0002] As an important component of the water resource system, the changes in the hydrodynamic conditions of groundwater directly affect the advancement of safe mining operations and the protection of the ecological environment. The direction of groundwater flow, as a core key parameter for revealing the hydrodynamic conditions of groundwater, is of great significance for engineering practices such as early warning and prevention of mine water inrush hazards, and source tracing and treatment of groundwater pollution.

[0003] Currently, conventional techniques for determining groundwater flow direction mainly include isotope tracing and spontaneous potential methods. In practical applications, these techniques are largely limited to determining the flow direction of aquifers on a large scale and rely on a monitoring network formed by multiple boreholes. Flow direction is determined through comprehensive analysis of data from multiple boreholes. However, groundwater in boreholes generally exhibits weak hydrodynamic characteristics, with extremely slow flow velocity, placing extremely stringent requirements on the sensitivity, resolution, and microscale adaptability of flow direction determination techniques. Due to limitations in their inherent technical principles, existing isotope tracing and spontaneous potential methods struggle to capture the differences in water flow signals within a small area within a single borehole, thus hindering flow direction determination.

[0004] Therefore, there is an urgent need for a groundwater flow direction measurement device that can be used for individual boreholes, adapted to micro-scale monitoring scenarios, and meet the requirements of weak hydrodynamic conditions. This is of great significance for gaining a deeper understanding of groundwater flow patterns and improving the technical level of groundwater monitoring and mine water hazard prevention. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a laser flow direction measuring device for boreholes. By emitting and receiving laser light, and combining it with the orientation calibration of an electronic compass, it enables accurate measurement of groundwater flow direction under weak hydrodynamic conditions at a microscale in a single borehole, providing key technical support for groundwater monitoring, ecological environmental protection, and mine water hazard prevention.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a laser flow direction measuring device in borehole, including an upper device, a lower device and a collector; the upper device and the lower device are coaxially connected by a hollow steel pipe, and the upper device and the lower device are electrically connected to the collector by wires respectively; The upper device includes an upper plate, an upper plate glass cover, a photosensitive sensor probe, an upper plate wire, and an electronic compass; the upper plate glass cover is fixedly connected to the lower part of the upper plate and forms a sealed structure with the upper plate; the photosensitive sensor probe is evenly divided into several groups along the circumference of the upper plate, and all photosensitive sensor probes are connected in series through the upper plate wire; the electronic compass is fixedly embedded inside the upper plate, and the electronic compass is electrically connected to the data collector through an electronic compass connecting wire; The lower device includes a lower plate, a lower plate glass cover, an infrared laser emitter, and lower plate wires; the lower plate glass cover is fixedly connected to the upper part of the lower plate and forms a sealed structure with the lower plate; the infrared laser emitter is divided into several groups along the circumference of the lower plate, and the number of groups is the same as that of the photosensitive sensor probe, and each group of infrared laser emitters corresponds perpendicularly to the photosensitive sensor probe; all infrared laser emitters are connected in series through the lower plate wires; One end of the hollow steel pipe passes through the center of the upper glass cover and is fixedly connected to the upper plate; the other end of the hollow steel pipe passes through the center of the lower glass cover and is fixedly connected to the lower plate; the upper plate wire, the lower plate wire, and the electronic compass connecting wire are all run inside the hollow steel pipe and are electrically connected to the data collector.

[0007] Furthermore, in the upper device, the photosensitive sensor probes are evenly divided into 16 groups along the circumference of the upper plate, and each group of photosensitive sensor probes consists of 5 photosensitive sensor probes. Each group of photosensitive sensor probes is arranged at equal intervals along the radial direction of the upper plate.

[0008] Furthermore, in the lower device, the infrared laser emitting heads are evenly divided into 16 groups along the circumference of the lower plate, and each group of infrared laser emitting heads consists of 5 infrared laser emitting heads; each group of infrared laser emitting heads is arranged at equal intervals along the radial direction of the lower plate, and the laser emission direction of each infrared laser emitting head is directed toward the corresponding photosensitive sensor probe.

[0009] Furthermore, the data collector is equipped with an upper plate data interface, a lower plate data interface, and an electronic compass data interface; the end of the upper plate wire away from the photosensitive sensor probe is plugged into the upper plate data interface, the end of the lower plate wire away from the infrared laser emitter is plugged into the lower plate data interface, and the end of the electronic compass connecting wire away from the electronic compass is plugged into the electronic compass data interface.

[0010] Furthermore, the outer side of the electronic compass connecting line is provided with an armored outer sheath, which is connected to the upper plate at the fixing point.

[0011] The beneficial effects of this utility model are: This utility model device uses laser emission and photosensitive reception, combined with the orientation calibration of an electronic compass, to achieve accurate determination of groundwater flow direction under weak hydrodynamic conditions at a microscale in a single borehole. It provides technical support for fields such as groundwater monitoring, ecological environmental protection, and mine water hazard prevention. It breaks through the technical limitations of traditional isotope tracing and spontaneous potential methods, which are only applicable to large-scale multi-hole aquifers and cannot complete the determination of groundwater flow direction under weak hydrodynamic conditions at a microscale in a single borehole. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a top view of the upper part of the device in this utility model.

[0014] Figure 3 This is a top view of the lower part of the device in this utility model.

[0015] In the diagram: 1. Upper plate; 2. Upper plate glass cover; 3. Photosensitive sensor probe; 4. Upper plate wire; 5. Upper connection point; 6. Electronic compass; 7. Fixing point; 8. Armored outer sheath; 9. Lower plate; 10. Lower plate glass cover; 11. Infrared laser emitter; 12. Lower plate wire; 13. Lower plate connection point; 14. Hollow steel pipe; 15. Data collector; 16. Upper plate data interface; 17. Lower plate data interface; 18. Electronic compass data interface; 19. Electronic compass connection cable. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model discloses a laser flow direction measuring device in boreholes.

[0018] Reference Figure 1-3 A laser flow direction measuring device in a borehole includes an upper device, a lower device, and a collector 15; the upper device and the lower device are coaxially connected by a hollow steel pipe 14, and the upper device and the lower device are electrically connected to the collector 15 by wires respectively. The upper device is the core unit for laser signal reception and azimuth data acquisition, including upper plate 1, upper plate glass cover 2, photosensitive sensor probe 3, upper plate wire 4 and electronic compass 6; the upper plate glass cover 2 is fixedly connected to the lower part of the upper plate 1 and forms a sealed structure with the upper plate 1 to isolate groundwater and suspended matter in the borehole and prevent internal electronic components from malfunctioning due to water immersion or impurities.

[0019] The photosensitive sensor probes 3 are evenly distributed along the circumference of the upper plate 1 and divided into 16 groups. Each group consists of 5 photosensitive sensor probes 3, and the 5 probes in the same group are arranged at equal intervals along the radial direction of the upper plate 1. This distribution method can form 16 radial monitoring lines. Subsequently, the data error of a single probe can be reduced by averaging the data of the 5 photosensitive sensor probes 3 on each line, thereby improving the accuracy of flow direction determination. All photosensitive sensor probes 3 are connected in series via upper plate wires 4 for centralized transmission of photoelectric signals. An electronic compass 6 is fixedly embedded inside the upper plate 1, which can collect the device's azimuth data in real time, providing a reference for subsequent determination of the specific azimuth of groundwater flow. The electronic compass 6 is electrically connected to the data collector 15 via an electronic compass connecting cable 19, enabling the transmission of azimuth data. The outer side of the electronic compass connecting cable 19 is also equipped with an armored sheath 8, which is fixedly connected to the upper plate 1 at a fixing point 7. This effectively resists mechanical wear and external impacts within the borehole, preventing breakage or signal interruption of the electronic compass connecting cable 19 and ensuring stable transmission of azimuth data.

[0020] The lower device is a laser signal emitting unit that corresponds to and cooperates with the upper device. It includes a lower plate 9, a lower plate glass cover 10, an infrared laser emitting head 11, and a lower plate wire 12. The lower plate glass cover 10 is fixedly connected to the upper part of the lower plate 9 and forms a sealed structure with the lower plate 9. It can protect the internal infrared laser emitting head 11 from the corrosion of the drilling water environment and provide a carrier for the deposition of suspended matter. The difference in the deposition of suspended matter is the core principle basis for determining the flow direction.

[0021] The distribution of the infrared laser emitters 11 along the circumference of the lower plate 9 is perfectly matched with that of the photosensitive sensor probe 3. That is, they are also evenly divided into 16 groups, each containing 5 infrared laser emitters 11. The 5 infrared laser emitters 11 in the same group are arranged at equal intervals along the radial direction of the lower plate 9, and the laser emission direction of each infrared laser emitter 11 is towards the photosensitive sensor probe 3 at the corresponding position of the upper device. This one-to-one vertical correspondence design can ensure that the laser signal can be stably projected to the receiving end and avoid the distortion of photosensitive data due to signal offset. All infrared laser emitters 11 are connected in series through the lower plate wires 12 to realize the unified transmission of power supply and working status signals.

[0022] The hollow steel pipe 14 serves as the core connection and wiring carrier of the device. One end of the hollow steel pipe 14 passes through the center of the upper glass cover 2 and is fixedly connected to the upper plate 1 at the upper connection point. The other end of the hollow steel pipe 14 passes through the center of the lower glass cover 10 and is fixedly connected to the lower plate 9 at the lower connection point. The upper plate wire 4, the lower plate wire 12, and the electronic compass connection line 19 are all run through the hollow steel pipe 14 and electrically connected to the data collector. This design provides centralized protection for various cables, preventing cable damage caused by rock wall scraping or water flow impact inside the borehole. It also reduces signal interference between different cables, ensuring the stability of data transmission.

[0023] The data acquisition unit 15 is the core of the device for signal reception and storage. It is equipped with an upper plate data interface 16, a lower plate data interface 17, and an electronic compass data interface 18. The end of the upper plate wire 4 away from the photosensitive sensor probe 3 is connected to the upper plate data interface 16. The end of the lower plate wire 12 away from the infrared laser emitter 11 is connected to the lower plate data interface 17. The end of the electronic compass connecting wire 19 away from the electronic compass 6 is connected to the electronic compass data interface 18.

[0024] The working principle of this utility model's borehole flow direction laser measuring device is as follows: The assembled measuring device is slowly lowered to the target aquifer position inside the borehole. After ensuring the device is horizontal, it is left to stand for 5 minutes. The purpose of this standing period is to allow the device to reach a stable equilibrium with the hydrodynamic environment and suspended matter distribution of the aquifer, avoiding disturbances during the lowering process that could affect the accuracy of subsequent data acquisition. Simultaneously, it ensures that the suspended matter deposition pattern on the surface of the lower glass cover 10 accurately reflects the groundwater flow state. After the initial settling period, the data acquisition unit 15 is activated. It continuously acquires 16 sets of photosensitive data from the photosensitive sensor probe 3 and real-time azimuth data from the electronic compass 6 at 5-second intervals, with the acquisition time controlled between 5 and 10 minutes. During this process, the data acquisition unit 15 receives the photosensitive signals from the photosensitive probe, the operating status signal from the infrared laser emitter, and the azimuth signal from the electronic compass through the upper data interface 16, the lower data interface 17, and the electronic compass data interface 18, respectively, and completes the data classification and storage.

[0025] Taking the center point of the upper plate 1 of the device as the origin, the 16 sets of photosensitive sensor probes 3 are regarded as 16 radial monitoring lines. The decrease in photosensitive data of 5 photosensitive sensor probes 3 on each monitoring line during the collection period is calculated, and then the average value of the decrease in data of the 5 probes on that monitoring line is taken to obtain the average decrease value corresponding to the 16 radial monitoring lines. Since the photosensitive sensor probe 3 in the direction of water inflow receives the least light signal obstruction, its photosensitive data decreases the least. Therefore, the monitoring line with the smallest average value among the 16 is the direction of water inflow into the borehole aquifer. The azimuth data of the electronic compass 6 during the collection period is retrieved, and combined with the installation azimuth of the monitoring line in the preliminary determination of the direction of water inflow, the actual geographical azimuth corresponding to the monitoring line is calculated, and the specific flow direction of groundwater in the borehole is finally determined.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A laser flow direction measuring device for boreholes, characterized in that: It includes an upper device, a lower device and a collector (15); the upper device and the lower device are coaxially connected by a hollow steel pipe (14), and the upper device and the lower device are electrically connected to the collector (15) by wires respectively; The upper device includes an upper plate (1), an upper plate glass cover (2), a photosensitive sensor probe (3), an upper plate wire (4), and an electronic compass (6); the upper plate glass cover (2) is fixedly connected to the lower part of the upper plate (1) and forms a sealed structure with the upper plate (1); the photosensitive sensor probe (3) is divided into several groups along the circumference of the upper plate (1), and all photosensitive sensor probes (3) are connected in series through the upper plate wire (4); the electronic compass (6) is fixedly embedded inside the upper plate (1), and the electronic compass (6) is electrically connected to the collector (15) through the electronic compass connecting line (19); The lower device includes a lower plate (9), a lower plate glass cover (10), an infrared laser emitter (11), and a lower plate wire (12); the lower plate glass cover (10) is fixedly connected to the upper part of the lower plate (9) and forms a sealed structure with the lower plate (9); the infrared laser emitter (11) is divided into several groups along the circumference of the lower plate (9), and the number of groups is the same as that of the photosensitive sensor probe (3), and each group of infrared laser emitters (11) is perpendicularly corresponding to the photosensitive sensor probe (3); all infrared laser emitters (11) are connected in series through the lower plate wire (12); One end of the hollow steel pipe (14) passes through the center of the upper plate glass cover (2) and is fixedly connected to the upper plate (1); the other end of the hollow steel pipe (14) passes through the center of the lower plate glass cover (10) and is fixedly connected to the lower plate (9); the upper plate wire (4), the lower plate wire (12) and the electronic compass connecting wire (19) are all installed inside the hollow steel pipe (14) and are electrically connected to the collector.

2. The borehole flow direction laser measuring device according to claim 1, characterized in that: In the upper device, the photosensitive sensor probes (3) are evenly divided into 16 groups along the circumference of the upper plate (1). Each group of photosensitive sensor probes (3) consists of 5 photosensitive sensor probes (3), and each group of photosensitive sensor probes (3) is arranged at equal intervals along the radial direction of the upper plate (1).

3. The borehole flow direction laser measuring device according to claim 2, characterized in that: In the lower device, the infrared laser emitting head (11) is evenly divided into 16 groups along the circumference of the lower plate (9), and each group of infrared laser emitting heads (11) consists of 5 infrared laser emitting heads (11); each group of infrared laser emitting heads (11) is arranged at equal intervals along the radial direction of the lower plate (9), and the laser emission direction of each infrared laser emitting head (11) is directed toward the corresponding photosensitive sensor probe (3).

4. A borehole flow direction measuring device according to any one of claims 1-3, characterized in that: The collector (15) is provided with an upper plate data interface (16), a lower plate data interface (17) and an electronic compass data interface (18); the end of the upper plate wire (4) away from the photosensitive sensor probe (3) is connected to the upper plate data interface (16), the end of the lower plate wire (12) away from the infrared laser emitter (11) is connected to the lower plate data interface (17), and the end of the electronic compass connecting wire (19) away from the electronic compass (6) is connected to the electronic compass data interface (18).

5. The borehole flow direction laser measuring device according to claim 4, characterized in that: The electronic compass connecting line (19) is provided with an armored outer skin (8) on the outside, and the armored outer skin (8) is connected to the upper plate (1) at the fixing point (7).

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