A kind of in-situ moisture content measuring device and method of continuous sample feeding type of stock storage bulk material

Abstract

The present application relates to the technical field of detecting the moisture content of piled bulk materials, and provides a continuous sampling in-situ moisture content measuring device for piled bulk materials, which comprises a supporting feeding mechanism, a drilling transmission mechanism, a lead-in drill bit, a sampling mechanism, a continuous sampling measuring mechanism, a continuous conveying and sampling discharging mechanism and a capacitance detection mechanism; the supporting feeding mechanism drives the continuous sampling measuring mechanism to move; the drilling transmission mechanism transmits rotary power to the lead-in drill bit and the continuous conveying and sampling discharging mechanism; the sampling mechanism enables the bulk material sample to enter the continuous sampling measuring mechanism; the continuous conveying and sampling discharging mechanism axially conveys the bulk material sample and discharges the bulk material sample from a lateral sampling discharging port; and the capacitance detection mechanism detects the bulk material sample. The present application can realize continuous in-situ measurement, obtain deep continuous moisture content information, and provide data support for quality estimation and layered moisture management of piled bulk materials.

Description

Technical Field

[0001] This invention relates to the field of moisture content detection technology for stockpiled bulk materials, and more specifically, to an in-situ moisture content measurement device and method for continuously fed stockpiled bulk materials. Background Technology

[0002] In ports, docks, and stockyards, the moisture content of stored bulk materials is a key parameter for inventory checks, settlement, and production scheduling. Existing methods for moisture content detection mainly include the drying loss-in-weight method, manual drilling sampling, handheld electrical moisture meters, and conveyor belt online moisture detection equipment. However, the drying loss-in-weight method and manual drilling sampling are cumbersome, lack real-time performance, and samples are prone to moisture loss or changes in state during transport. Handheld instruments are mostly used for surface or shallow layer detection and cannot reflect the deep moisture content distribution. Online moisture detection equipment relies on a stable material flow and cannot be directly applied to the deep internal detection of statically stored bulk materials. Although some existing deep detection devices combine drilling sampling with electrical detection, they usually adopt a stop-drill sampling or segmented measurement mode, which makes it difficult to form a stable bulk material flow path during continuous drilling. This results in the inability to obtain continuous moisture content information along the depth direction during a single stockpile entry and lacks an effective mechanism for handling bulk material transport delays and parasitic interference. Summary of the Invention

[0003] To address the problem in existing technologies that make it difficult to continuously obtain the moisture content distribution along the depth direction inside the stockpiled bulk material during a single drilling process, this invention provides an in-situ moisture content measurement device and method for continuous feeding of stockpiled bulk materials. This enables continuous introduction, axial transport, dynamic dielectric measurement, and lateral sampling of bulk material samples. Furthermore, it can combine signal correction and hysteresis compensation to generate a continuous depth-moisture content curve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides an in-situ moisture content measurement device for continuously fed bulk materials, comprising: a support feeding mechanism, a drilling transmission mechanism, an inlet drill bit, a sampling mechanism, a continuous feeding measurement mechanism, a continuous conveying and discharging mechanism, and a capacitance detection mechanism; the support feeding mechanism is connected to the continuous feeding measurement mechanism and is used to drive it to move along a predetermined direction; the drilling transmission mechanism is disposed on the support feeding mechanism and is connected to the inlet drill bit and the continuous conveying and discharging mechanism to transmit rotational power; the inlet drill bit is located below the continuous feeding measurement mechanism, and the sampling mechanism is disposed between the two, for allowing the bulk material sample to enter the continuous feeding measurement mechanism; the inlet drill bit allows the bulk material particles below and around it to enter the lower sampling structure; the continuous feeding measurement mechanism has a lateral discharge port on its side, and the continuous conveying and discharging mechanism passes through the continuous feeding measurement mechanism to transport the bulk material sample axially and discharge it from the lateral discharge port; the capacitance detection mechanism is disposed inside the continuous feeding measurement mechanism and is used to detect the bulk material sample.

[0005] Furthermore, the continuous feeding and discharging mechanism includes: an insulating sleeve, a spiral conveying blade, and a variable-angle guide blade; the insulating sleeve is fixed to the drilling transmission mechanism, the spiral conveying blade and the variable-angle guide blade are integrally connected and respectively fixed to the lower and upper ends of the insulating sleeve, the spiral conveying blade is used to continuously convey the bulk sample in the continuous feeding and measuring mechanism from bottom to top along the axial direction of the insulating sleeve, and the variable-angle guide blade is used to guide the bulk sample to the side of the discharge port.

[0006] Furthermore, the continuous feed measurement mechanism includes: a cylindrical shell with two lateral discharge ports opposite each other on the cylindrical shell, both of which are connected to the detection cavity inside the cylindrical shell; and a spiral conveying blade and a variable angle guide blade that are rotatably fitted inside the detection cavity of the cylindrical shell.

[0007] Furthermore, the inner edge of the variable angle guide vane is connected to the insulating sleeve, and the outer edge of the variable angle guide vane gradually bends and flips radially outward along the axial direction of the insulating sleeve towards the cylindrical outer shell, so that the force exerted by the vane on the bulk sample gradually changes from being mainly axial conveying component to having both axial and radial components; the lateral discharge port corresponds to the guiding area of ​​the variable angle guide vane.

[0008] Furthermore, the drilling transmission mechanism includes: a brushless DC motor, a gearbox, and multiple transmission shaft bodies interconnected by non-circular cross-section telescopic connectors; both the brushless DC motor and the gearbox are fixed to the support feed mechanism via a power support base; the output end of the brushless DC motor is connected to the gearbox, and the output end of the gearbox is connected to the transmission shaft body located at the top; the transmission shaft body at the top is rotatably connected to the rotary support assembly at the bottom of the support feed mechanism; the transmission shaft body located at the bottom is fixedly connected to the guide drill bit via a drill bit connecting section; an insulating sleeve is coaxially fixedly connected to the transmission shaft body that penetrates into the cylindrical housing, and an axial sealing structure is installed between the transmission shaft body and the central hole at the top of the cylindrical housing.

[0009] Furthermore, the supporting feed mechanism includes: a tripod, a feed drive, a movable slide, a telescopic outer tube, a guide member, and a guide groove; the fixed end of the feed drive is fixed to the support platform of the tripod, the movable end of the feed drive is fixedly connected to the movable slide, and the top of the telescopic outer tube is fixedly connected to the movable slide; the bottom of the telescopic outer tube is fixedly connected to the top of the cylindrical shell, and the drive shaft body passes through the cylindrical shell; the guide member is fixed to the outer end of the movable slide, and the guide groove is opened on the tripod, with the guide member and the guide groove slidingly engaged to restrict the circumferential rotation of the telescopic outer tube.

[0010] Furthermore, the sample introduction mechanism includes: a shielding isolation ring and a conical isolation ring; the shielding isolation ring is fixed to the bottom of the cylindrical shell, and the conical isolation ring is fixed to the top of the inlet drill bit, forming an annular bulk sample inlet between the shielding isolation ring and the conical isolation ring; a lower sample introduction channel is formed between the shielding isolation ring and the drive shaft body, and the upper part of the lower sample introduction channel is connected to the interior of the cylindrical shell.

[0011] Furthermore, the capacitance detection mechanism includes: an upper annular electrode and a lower annular electrode; the upper annular electrode is installed inside the cylindrical shell, and an upper insulating bushing is provided between the upper annular electrode and the inner wall of the cylindrical shell, and an inner insulating sleeve or insulating gap is provided between the upper annular electrode and the insulating sleeve; an insulating protective shoulder is fixed to the inner wall of one end of the shielding isolation ring inserted into the cylindrical shell, and a lower insulating bushing is fixed between the bottom of the insulating protective shoulder and the shielding isolation ring; the lower annular electrode is installed in the annular groove between the top of the insulating protective shoulder and the shielding isolation ring; the lower sample inlet channel forms a transition area near the lower annular electrode, so that the bulk sample gradually changes from the introduction state near the drill bit area to a stable axial conveying state.

[0012] Furthermore, the bottom of the inlet drill bit is a guide tip, and a spiral guide groove is provided on the conical surface of the inlet drill bit. The upper end of the spiral guide groove is connected to the annular bulk sample inlet, and the spiral direction of the spiral guide groove matches the preset rotation direction of the inlet drill bit.

[0013] The present invention also provides a method for in-situ measurement of moisture content in a continuous feed manhole for stockpiled bulk materials, applicable to the in-situ moisture content measurement device for a continuous feed manhole for stockpiled bulk materials described in any of the above claims. The method includes the following steps: The continuous feeding and measuring mechanism is driven by the support feeding mechanism to move into the stockpiled bulk material in a predetermined direction. The drilling transmission mechanism drives the inlet drill bit to rotate, so that the bulk material sample continuously enters the continuous feeding and measuring mechanism through the feeding mechanism. The continuous conveying and discharging mechanism conveys the bulk material sample axially and discharges it through the lateral discharge port. The bulk sample in the continuous feed measurement mechanism is detected by the capacitance detection mechanism, and the drilling depth and electrical response signal are collected simultaneously. The electrical response signal is conditioned and the no-load reference is corrected. The time synchronization of the electrical response signal and the drilling depth is achieved by combining a unified timestamp. Based on the preset transport delay parameter, the synchronized electrical response signal is compensated for the transport lag of the bulk sample, and the electrical response signal is corrected to the depth corresponding to the actual entry of the bulk sample. Based on the compensated electrical response signal and calibration model, the water content is continuously calculated and a depth-water content continuous curve is generated.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention provides a continuous feeding in-situ moisture content measurement device and method for stockpiled bulk materials. Through the coordinated operation of the support feeding mechanism and the drilling transmission mechanism, the device achieves continuous drilling and in-situ measurement inside the stockpiled bulk materials. Utilizing the connection design between the guide drill bit and the sample feeding mechanism, the bulk material sample can continuously and stably enter the detection chamber during the drilling process, avoiding the inefficiency and sample disturbance problems caused by traditional stop-drill sampling. Through the combination structure of the spiral conveying blades and variable-angle guide blades in the continuous conveying and discharging mechanism, a forced axial continuous material flow is constructed in the detection chamber, and the measured sample is smoothly guided to the lateral discharge port for discharge, ensuring the stability of the bulk material filling state in the measurement area and overcoming signal fluctuations caused by poor contact of the exposed probe.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the in-situ moisture content measurement device for continuous feeding of bulk materials according to the present invention. Figure 2This is a partial schematic diagram of the in-situ moisture content measurement device for continuous feed of bulk materials according to the present invention. Figure 1 ; Figure 3 This is a partial schematic diagram of the in-situ moisture content measurement device for continuous feed of bulk materials according to the present invention. Figure 2 ; Figure 4 This is a partial schematic diagram of the in-situ moisture content measurement device for continuous feed of bulk materials according to the present invention. Figure 3 ; Figure 5 This is a flowchart of the in-situ moisture content measurement method for continuous feeding of bulk materials according to the present invention.

[0017] Icons: 1-Feed support mechanism; 101-Tripod; 102-Feed drive component; 103-Moving slide; 104-Telescopic outer tube; 2-Drilling transmission mechanism; 201-Brushless DC motor; 202-Reduction gearbox; 203-Non-circular cross-section telescopic connector; 204-Drive shaft body; 205-Rotary bearing assembly; 206-Drill bit connection section; 207-Axial sealing structure; 208-Power support seat; 209-Axial guide support assembly; 3-Inlet drill bit; 301-Helical guide groove; 4-Sample feeding mechanism; 401-Shielding partition 402-Isolation ring; 403-Annular bulk sample inlet; 404-Lower sample inlet channel; 5-Continuous sample feeding measuring mechanism; 501-Cylindrical outer shell; 502-Side sample outlet; 503-Detection chamber; 6-Continuous conveying sample discharging mechanism; 601-Insulating sleeve; 602-Spiral conveying blade; 603-Variable angle guide blade; 7-Capacitance detection mechanism; 701-Upper annular electrode; 702-Lower annular electrode; 703-Upper insulating bushing; 704-Insulating protective shoulder; 705-Lower insulating bushing; 8-Stored bulk material. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 The embodiments further illustrate the present invention in detail, so that those skilled in the art can implement it based on the description.

[0019] Example 1:

[0020] like Figures 1-4As shown, a continuous feed in-situ moisture content measurement device for stockpiled bulk materials includes: a support feeding mechanism 1, a drilling transmission mechanism 2, an infeed drill bit 3, a sampling mechanism 4, a continuous feed measuring mechanism 5, a continuous conveying and discharging mechanism 6, and a capacitance detection mechanism 7. The support feeding mechanism 1 is connected to the continuous feed measuring mechanism 5 and is used to drive it to move along a predetermined direction. Specifically, the support feeding mechanism 1 typically adopts a tripod or gantry frame or other ground support structure, and its interior is equipped with an electrically or hydraulically driven linear feed unit, which is fixedly connected to the top of the continuous feed measuring mechanism 5. In actual operation, the predetermined direction mainly refers to the direction of vertical downward entry into the stockpiled bulk material 8. The support feeding mechanism 1 not only provides a stable ground support reference for the entire device, but also, by precisely controlling the feeding speed and stroke, enables the continuous feed measuring mechanism 5 to penetrate into the stockpiled bulk material 8 at a constant rate, thereby ensuring that the subsequently collected moisture content data has uniform depth resolution. The drilling transmission mechanism 2 is mounted on the support feeding mechanism 1 and is connected to the guide drill bit 3 and the continuous conveying and discharging mechanism 6. It transmits rotational power via a transmission shaft running through the central axis of the device, simultaneously transmitting the rotational torque to the guide drill bit 3 at the bottom and the continuous conveying and discharging mechanism 6 inside. The guide drill bit 3 is located below the continuous feed measuring mechanism 5, and the sampling mechanism 4 is positioned between them, allowing the bulk sample to enter the continuous feed measuring mechanism 5. As the foremost component of the device, the guide drill bit 3 directly contacts and cuts into the stockpiled bulk material 8. Its conical or side surface is designed with a flow guiding structure, which actively gathers and pushes the surrounding bulk material upwards during rotation. The sampling mechanism 4 serves as a transition interface, receiving the loose material guided by the guide drill bit 3 and smoothly guiding it into the internal cavity of the continuous feed measuring mechanism 5. This layout allows the bulk sample to automatically and continuously enter the measurement area with the assistance of drilling pressure without the need for external sampling tubes or manual intervention, helping to reduce moisture evaporation or particle segregation during sample transfer. The continuous feed measuring mechanism 5 has a lateral discharge port 502 on its side. A continuous conveying and discharge mechanism 6 is located inside the continuous feed measuring mechanism 5, used to axially convey the bulk sample and discharge it through the lateral discharge port 502. The continuous feed measuring mechanism 5 forms a closed detection chamber to withstand the lateral pressure and friction of the bulk material. The continuous conveying and discharge mechanism 6 is coaxially arranged inside this detection chamber, forcibly lifting the bulk sample entering the chamber from bottom to top during rotation. When the sample is lifted to the height of the lateral discharge port 502, under the action of centrifugal force or a dedicated flow guiding structure, it is radially discharged through the lateral discharge port 502 into the stored bulk material 8 outside the device, realizing a continuous flow path from bottom to top. This helps to keep the detection chamber filled with fresh, flowing bulk sample and reduces the interference of dead zone material accumulation on the measurement results. A capacitance detection mechanism 7 is located inside the continuous feed measuring mechanism 5 and is used to detect the bulk sample.Through the system-level coordination of the above components, this embodiment constructs a complete in-situ continuous measurement device. During operation, the support feed mechanism 1 drives the guide drill bit 3 and the continuous feed measurement mechanism 5 downward. The drilling transmission mechanism 2 drives the guide drill bit 3 to break up the loose material and form an upward sample flow. The sample enters the detection chamber 503 through the sample feeding mechanism 4, and flows through the capacitance detection mechanism 7 under the push of the continuous conveying and discharging mechanism 6 to complete the detection. Finally, it is discharged from the side discharge port 502.

[0021] Example 2:

[0022] like Figures 1-4 As shown, the continuous conveying and discharging mechanism 6 includes: an insulating sleeve 601, a spiral conveying blade 602, and a variable-angle guide blade 603; the insulating sleeve 601 is a shaft insulation layer made of insulating material; the insulating sleeve 601 is fixed to the drilling transmission mechanism 2, the spiral conveying blade 602 and the variable-angle guide blade 603 are integrally connected and respectively fixed to the lower end and upper end of the insulating sleeve 601, the spiral conveying blade 602 is used to continuously convey the bulk sample in the continuous feeding and measuring mechanism 5 from bottom to top along the axial direction of the insulating sleeve 601, and the variable-angle guide blade 603 is used to guide the bulk sample to the side discharge port 502.

[0023] In this invention, the insulating sleeve 601 is preferably made of materials that combine high wear resistance and excellent dielectric properties, such as polyetheretherketone (PEEK), ultra-high molecular weight polyethylene (UHMWPE), or industrial ceramics. This material selection design has dual technical benefits: on the one hand, it serves as the mounting base for the spiral conveying blade 602 and the variable angle guide blade 603, providing sufficient mechanical strength to withstand the torsional torque and radial pressure during the bulk material conveying process; on the other hand, it constructs an electric field isolation barrier between the drive shaft body 204 and the capacitance detection mechanism 7, which is beneficial to improving the purity and stability of the moisture content measurement signal. The insulating sleeve 601 is coaxially fixed to the drive shaft body 204 by means of keyways, pins, or interference fits, and rotates synchronously with the drive shaft body 204; the spiral conveying blade 602 is located in the lower section of the insulating sleeve 601, occupying the main axial length of the detection cavity 503; the variable angle guide blade 603 is located in the upper section of the insulating sleeve 601, at a height adjacent to the lateral discharge port 502. Both components are integrated, reducing the potential seams and steps present in traditional split-type connections. This seamless transition structure not only ensures the dynamic balance accuracy of the rotating components but, more importantly, prevents bulk particles from getting stuck or remaining at the connection gaps, thus preventing contamination of the detection chamber 503 and cross-interference from subsequent samples due to material accumulation. The spiral conveying blades 602 employ a helical geometry with equal or variable pitch, functioning similarly to a positive displacement pump. They overcome the weight of the bulk material itself and the frictional resistance with the chamber wall, forcibly driving the sample to flow at a constant velocity through the sensitive area where the capacitance detection mechanism 7 is located. This forced convection mechanism is beneficial for the continuity and uniformity of the bulk sample filling density between electrodes, improving the signal drift problem caused by porosity fluctuations in static contact measurements. When the bulk sample is lifted to the top, the variable-angle guide blades 603 take over. Their special curved surface structure smoothly decomposes the originally vertically upward axial motion vector, generating a radial component pointing towards the lateral discharge port 502, allowing the sample to be discharged smoothly and preventing the bulk sample from forming a dead zone accumulation or backflow at the top of the detection chamber, thereby maintaining the dynamic balance of the entire flow path.

[0024] Example 3:

[0025] like Figures 1-4As shown, the continuous feed measurement mechanism 5 includes: a cylindrical outer shell 501, with two lateral discharge ports 502 opposite to each other on the cylindrical outer shell 501, both of which are connected to the detection cavity 503 inside the cylindrical outer shell 501; a spiral conveying blade 602 and a variable angle guide blade 603 are rotatably fitted within the detection cavity 503 of the cylindrical outer shell 501. The cylindrical outer shell 501 constitutes the main pressure-bearing container and electromagnetic shielding shell of the device. In this embodiment, the cylindrical outer shell 501 is preferably made of high-strength stainless steel or wear-resistant alloy material, and its inner wall is precision machined to ensure cylindricity, thereby providing a stable coaxial reference for the internal rotating parts. The cylindrical outer shell 501 not only withstands the huge lateral pressure and frictional resistance generated by the stockpiled bulk material 8 during drilling, but also serves as the grounding reference potential layer of the capacitance detection mechanism 7, effectively shielding the interference of external stray electromagnetic fields on weak capacitance signals. Two lateral discharge ports 502 are symmetrically arranged 180 degrees around the cylindrical outer shell 501 and are located at the same height plane along the axial direction. This symmetrical arrangement is significant because when the bulk sample is ejected at high speed by the variable-angle guide vanes 603, it generates a radial reaction force on the shell. If only a single discharge port is provided, this reaction force will form a continuous unidirectional eccentric torque, causing periodic bending vibration of the transmission shaft system, aggravating bearing wear, and even leading to seal failure. Through the symmetrical dual-port design, the radial forces generated by the two discharge ports cancel each other out, maintaining the dynamic balance of the rotating system and significantly improving the operational stability of the device under deep, high-resistance conditions. Furthermore, the symmetrical discharge reduces the possibility of material accumulating on one side of the top of the detection chamber 503, forming a dead zone, ensuring a consistent residence time distribution of the bulk sample within the measurement area, thereby improving the representativeness of the moisture content measurement. Furthermore, the lateral discharge port 502 is directly cut from the side wall of the cylindrical shell 501, without any outwardly protruding discharge pipes or guide shrouds. This flush design minimizes the maximum outer diameter of the device, reducing side wall friction resistance during drilling and avoiding the risk of damage to protruding structures within the bulk material pile. The outer edges of the spiral conveyor blades 602 and the variable-angle guide blades 603 are not in close contact with the inner wall of the cylindrical shell 501, but maintain a preset working gap. The size of this gap is determined comprehensively based on the maximum particle size of the bulk sample, blade stiffness, manufacturing tolerances, and radial runout during rotation. On the one hand, sufficient gap ensures that the rotating components will not experience rigid friction or jamming with the stationary shell under any operating conditions, ensuring the safety of the drive system; on the other hand, this gap is controlled within a small range to limit the backflow of bulk particles through the gap or the formation of a stagnant layer near the cavity wall under the action of centrifugal force and pressure gradient. This controlled clearance fit actually constitutes a non-contact dynamic seal and flow constraint, which allows the bulk material to be smoothly lifted axially, while forcing most of the material to flow through the central capacitive sensing sensitive area, thereby ensuring a high correlation between the measurement signal and the overall sample state.

[0026] Example 4:

[0027] like Figures 1-4 As shown, the inner edge of the variable-angle guide vane 603 is connected to the insulating sleeve 601, and the outer edge of the variable-angle guide vane 603 gradually bends and flips radially outward along the axial direction of the insulating sleeve 601 towards the cylindrical outer shell 501. This causes the force exerted by the variable-angle guide vane 603 on the bulk sample to gradually change from being mainly axially conveying to having both axial and radial components. The lateral discharge port 502 corresponds to the guiding area of ​​the variable-angle guide vane 603. In this invention, the variable-angle guide vane 603 does not adopt a simple fixed-angle inclined plate or right-angle bend structure, but presents a continuously changing spatial curved surface shape. Its inner edge is firmly attached to or integrally formed on the outer wall of the insulating sleeve 601, serving as the reference for the transmission of rotational power; while its outer edge starts from an approximately axially extending state at the bottom, and as the height increases, it smoothly bends and flips synchronously in the circumferential and radial directions. When the bulk sample enters the region as the blades rotate and rise, it is initially subjected to an upward axial pushing force, maintaining vertical conveying motion. As the blade curvature gradually increases, the normal force exerted on the bulk particles by the blade surface begins to decompose, generating a radial component pointing towards the inner wall of the cylindrical outer shell 501. This radial component is not abrupt but gradually increases with the increase of the blade rotation angle. Compared to abrupt baffle reversal, this gradual flow guidance helps reduce the breakage, local compaction, or impact noise of bulk particles caused by abrupt changes in flow direction. It also reduces the probability of material forming a vortex dead zone or rebounding back at the top of the detection chamber 503, which is beneficial to the smoothness and continuity of the sample discharge process. The lateral discharge port 502 is located on the cylindrical outer shell 501, precisely corresponding to the area where the variable-angle guide blade 603 completes the main radial guiding action. That is, when the bulk sample gains sufficient radial velocity under the action of the blades and breaks free from the blade constraint, its trajectory points exactly towards the opening range of the lateral discharge port 502. This precise matching in time and space ensures that the vast majority of the tested samples can be discharged smoothly, preventing materials from idling ineffectively above the discharge port or leaking prematurely below.

[0028] Example 5:

[0029] like Figures 1-4As shown, the drilling transmission mechanism 2 includes: a brushless DC motor 201, a reduction gearbox 202, and multiple transmission shaft bodies 204 interconnected by non-circular cross-section telescopic connectors 203. The segmented transmission shaft system design in this invention addresses the engineering challenge of dynamically decoupling the "rotational power transmission" and "axial feed motion" in space during deep drilling. Since the device needs to maintain a constant speed rotation of the internal conveying components while continuously drilling downwards, the transmission shaft body 204 must have the ability to automatically extend with increasing drilling depth. The non-circular cross-section telescopic connector 203, as a key torque coupling interface, preferably has a non-circular geometric shape such as an external hexagon, internal hexagon, rectangular spline, or involute spline. This structure allows adjacent transmission shaft bodies 204 to slide freely under axial force to adapt to length changes, while relying on the surface fit of the non-circular cross-section to force synchronous rotation, thereby achieving the function of "transmitting torque but not displacement." Both the brushless DC motor 201 and the gearbox 202 are fixed to the support feed mechanism 1 via a power support base 208. The output end of the brushless DC motor 201 is connected to the gearbox 202, and the output end of the gearbox 202 is connected to the drive shaft body 204 located at the top. The drive shaft body 204 at the top is rotatably connected to the rotary support assembly 205 at the bottom of the support feed mechanism 1. The drive shaft body 204 located at the bottom is fixedly connected to the guide drill bit 3 via a drill bit connecting section 206. A detachable connection structure can also be used between the drill bit connecting section 206 and the drive shaft body 204. An insulating sleeve 601 is coaxially fixedly connected to the drive shaft body 204, which is inserted into the cylindrical housing 501. An axial sealing structure 207 is installed between the drive shaft body 204 and the central hole at the top of the cylindrical housing 501, and an axial guide support assembly 209 is installed between the drive shaft body 204 and the central hole at the bottom of the cylindrical housing 501. The axial sealing structure 207 is located at the point where the drive shaft body 204 exits the housing. It can be a labyrinth seal, lip seal, or packing seal. Its main function is bidirectional isolation: on the one hand, it prevents fine powder particles from the externally stored bulk material 8 from entering the precision transmission area and causing wear or jamming; on the other hand, it prevents the sample in the detection chamber 503 from leaking upwards and contaminating the upper mechanism. The axial guide support assembly 209 is installed at the center hole at the bottom of the housing. It is usually composed of a wear-resistant copper sleeve, a self-lubricating bearing, or a rolling bearing. Its core function is to provide radial constraint on the high-speed rotating drive shaft body 204 and the insulating sleeve 601, suppressing radial runout and sway caused by the bending deformation of the slender shaft or the uneven resistance of the bulk material, thereby maintaining the coaxiality between the drive shaft body 204 and the capacitance detection mechanism 7 and ensuring the stability of the electric field distribution.

[0030] Example 6:

[0031] like Figures 1-4As shown, the support feed mechanism 1 includes: a tripod 101, a feed drive 102, a movable slide 103, a telescopic outer tube 104, a guide member, and a guide groove. The tripod 101 serves as the ground support reference for the entire device, and its top is equipped with a horizontal support platform for mounting the drilling transmission mechanism 2 and the fixed end of the feed drive 102. The feed drive 102 typically uses linear actuators such as electric push rods, servo screw modules, or hydraulic cylinders. Its moving end is rigidly connected to the movable slide 103, thereby transmitting linear driving force to the movable slide 103. The movable slide 103 serves as a motion conversion interface. Its upper end is fixedly connected to the top of the telescopic outer tube 104, and its lower end is embedded in the guide groove on the column of the tripod 101 through the guide member, forming a stable axial moving pair. The bottom of the telescopic outer tube 104 is fixedly connected to the top of the cylindrical outer shell 501, forming an external protective sleeve that rises and falls synchronously with the movable slide 103. The drive shaft body 204 passes through the internal central axis of the cylindrical outer shell 501 and the telescopic outer tube 104, achieving dynamic and static separation of the internal and external structures. The fixed end of the feed drive component 102 is fixed to the support platform of the tripod 101, and the moving end of the feed drive component 102 is fixedly connected to the movable slide 103. The top of the telescopic outer tube 104 is fixedly connected to the movable slide 103. The bottom of the telescopic outer tube 104 is fixedly connected to the top of the cylindrical outer shell 501, and the drive shaft body 204 passes through the cylindrical outer shell 501. The guide component is fixed to the outer end of the movable slide 103, and the guide groove is opened on the tripod 101. The guide component and the guide groove slide in a sliding fit to restrict the circumferential rotation of the telescopic outer tube 104. The design intention of this anti-rotation guide structure is to cope with the complex mechanical conditions generated during the drilling of the bulk material storage 8. Specifically, when the guide drill bit 3 rotates and cuts in dense or viscous bulk material, it generates a huge reverse torque, which is easily transmitted to the telescopic outer tube 104 through the drive shaft body 204 and the cylindrical housing 501. Without effective circumferential restraint, the telescopic outer tube 104 will tend to rotate with the drill bit. This not only causes signal cables and power lines attached to its surface to become entangled or even broken, but also subjects the feed drive component 102 to unexpected torsional loads, accelerating the wear and failure of the lead screw or push rod seals. More importantly, the unexpected rotation of the telescopic outer tube 104 will interfere with the depth encoder's measurement reference, causing a mismatch between the recorded drilling depth and the actual position, thus disrupting the correspondence between the water content curve and depth. By setting a mechanical limiting fit between the guide component and the guide groove, the rotational freedom of the telescopic outer tube 104 is forcibly locked, allowing it to slide smoothly only along a preset vertical trajectory, thereby helping to reduce the aforementioned potential hazards.

[0032] Example 7:

[0033] like Figures 1-4As shown, the sample introduction mechanism 4 includes a shielding isolation ring 401 and a conical isolation ring 402. The shielding isolation ring 401 is fixed to the bottom of the cylindrical outer shell 501, forming the lower boundary of the detection cavity 503 as a stationary component. The conical isolation ring 402 is fixed to the top of the inlet drill bit 3 and rotates with the drill bit. This dynamic-static separation structure ensures the independence of the drilling and breaking function while providing a stable mechanical interface for the controlled introduction of bulk samples. An annular bulk sample inlet 403 is formed between the shielding isolation ring 401 and the conical isolation ring 402. Specifically, this inlet is a slit-like structure distributed around the central axis at 360 degrees, and its opening size is determined by the axial or radial gap between the two rings. Compared with the traditional single-sided opening or inclined groove feeding method, the annular bulk sample inlet 403 has significant hydrodynamic advantages. It can receive bulk samples pushed up by the conical guide groove of the inlet drill bit 3 from all directions, avoiding uneven material accumulation or uneven wear in the cavity caused by single-sided feeding. Meanwhile, the annular inlet and the rotating spiral guide channel 301 below are seamlessly connected in space, allowing the bulk sample to continuously and smoothly enter the continuous feed measurement mechanism 5 under the combined action of centrifugal force and spiral lift. This reduces signal discontinuities caused by intermittent sampling and lays the material foundation for obtaining a high-resolution depth-moisture content continuous curve. Furthermore, the shielding isolation ring 401 is typically made of conductive metal and is electrically connected to the grounded cylindrical shell 501. Therefore, it also acts as a crucial electromagnetic shielding layer, effectively blocking stray electric field interference generated by the high-speed rotating metal drill bit connection section 206 and the guide drill bit 3 on the upper capacitance detection mechanism 7, which helps improve the signal-to-noise ratio of weak dielectric signals. A lower sample inlet channel 404 is formed between the shielding isolation ring 401 and the drive shaft body 204, and the upper part of the lower sample inlet channel 404 is connected to the interior of the cylindrical shell 501. Specifically, the lower sample inlet channel 404 is an annular vertical channel located between the inner wall of the shielding isolation ring 401 and the outer wall of the drive shaft body 204 (or its external insulating sleeve 601). This channel serves as a pre-stabilization zone, ensuring that the filling density and flow rate of the bulk sample tend to stabilize before entering the detection chamber 503.

[0034] Example 8:

[0035] like Figures 1-4As shown, the capacitance detection mechanism 7 includes an upper annular electrode 701 and a lower annular electrode 702. The upper annular electrode 701 and the lower annular electrode 702 constitute a pair of sensitive elements for capacitance detection. They are arranged axially at intervals within the detection cavity 503 of the continuous feed measurement mechanism 5, forming an electric field measurement area with fixed geometric boundaries. Compared with single-ended probes or asymmetric structures, this dual-electrode annular layout can generate a more uniform and concentrated electric field line distribution, allowing the measurement signal to mainly reflect the average dielectric properties of the bulk sample within the cylindrical annular space between the two electrodes. This effectively suppresses edge effects and interference from stray fields in the external environment, laying a physical foundation for obtaining high-precision moisture content data. The upper annular electrode 701 is mounted inside the cylindrical housing 501. An upper insulating bushing 703 is provided between the upper annular electrode 701 and the inner wall of the cylindrical housing 501. An inner insulating sleeve or insulating gap is provided between the upper annular electrode 701 and the insulating sleeve 601. The upper insulating bushing 703 is usually made of high dielectric strength and low loss insulating materials such as polytetrafluoroethylene (PTFE) and PEEK. It not only serves as a mechanical fixation and electrical isolation to prevent short circuit between the upper annular electrode 701 and the grounded metal cylindrical housing 501, but also serves as the outer boundary of the electric field, defining the radial outer limit of the measurement area. At the same time, the inner insulating sleeve or a precisely controlled air insulating gap is provided between the inner hole of the upper annular electrode 701 and the rotating insulating sleeve 601 to achieve non-contact isolation between the moving and stationary parts. This design is crucial because the insulating sleeve 601 rotates at high speed with the drive shaft body 204. Direct contact with the electrode would generate frictional electrostatic noise and accelerate wear. Maintaining a small insulating gap or using a wear-resistant liner avoids mechanical interference and cuts off the path of induced charge coupling from the drive shaft body 204 to the measuring electrode, improving the signal-to-noise ratio under dynamic measurement conditions. An insulating protective shoulder 704 is fixed to the inner wall of one end of the shielding isolation ring 401 inserted into the cylindrical outer shell 501. A lower insulating bushing 705 is fixed between the bottom of the insulating protective shoulder 704 and the shielding isolation ring 401. The lower annular electrode 702 is installed in the annular groove between the top of the insulating protective shoulder 704 and the shielding isolation ring 401. The insulating protective shoulder 704, as a raised annular step structure, provides a precise axial positioning reference and support surface for the lower annular electrode 702, ensuring a constant distance between the upper and lower electrodes. Furthermore, it extends downwards to form a physical shielding barrier, blocking radiated interference from metal transmission components such as the drill bit connection section 206 below to the measured electric field. The lower insulating bushing 705 fills the space between the insulating protective shoulder 704 and the shielding isolation ring 401, ensuring electrical independence between the lower electrode assembly and the grounded shield. The lower sample inlet channel 404 forms a transition area near the lower annular electrode 702, allowing the bulk sample to gradually transition from an inlet state near the drill bit to a stable axial transport state.This transition region is a crucial fluid dynamic rectification domain connecting the sample introduction mechanism 4 and the capacitance detection sensitive area. The bulk sample entering from the annular sample inlet 403, propelled by the spiral guide channel 301 of the guide drill bit 3, often exhibits a large tangential velocity component and turbulent characteristics, with uneven packing density. Directly allowing it into the measurement area where the lower annular electrode 702 is located would cause high-frequency random fluctuations in the bulk density between the electrodes, resulting in severe noise in the capacitance signal and masking the true moisture content change. The transition region, through specific geometric constraints, such as a gradually contracting annular cross-section or built-in rectifying guide ribs, forces the bulk particles to dissipate disordered kinetic energy, smoothly deflecting their flow vector to a pure axial direction, and achieving a dense and uniform laminar flow state before entering the electrode area. This pretreatment mechanism essentially transforms the uncertainty of mechanical introduction into the determinism of controlled flow, reducing measurement errors caused by feed disturbances and improving the repeatability and accuracy of in-situ moisture content data. For example, for cohesive soils with poor flowability, the length of the transition zone can be appropriately increased to extend the steady flow path; while for dry fine sand, the length can be shortened to reduce flow resistance, demonstrating the structural design's adaptability to different material properties.

[0036] Example 9:

[0037] like Figures 1-4As shown, the bottom of the inlet drill bit 3 is a guide tip, and a spiral guide groove 301 is provided on the conical surface of the inlet drill bit 3. The upper end of the spiral guide groove 301 is connected to the annular bulk sample inlet 403, and the rotation direction of the spiral guide groove 301 matches the preset rotation direction of the inlet drill bit 3. As the foremost actuator of the device penetrating the stockpiled bulk material 8, the guide tip at the bottom of the inlet drill bit 3 is usually conical or bullet-shaped, and its surface is hardened to resist wear. The main function of this guide tip is to split the dense bulk material layer during drilling, reduce axial penetration resistance, and provide initial centering guidance for the entire measuring device, preventing the device from deviating when entering the stockpiled bulk material 8. More importantly, the geometry of the guide tip can evenly push the bulk particles below and around it to the surrounding areas, creating a relatively loose and pressure-uniform feeding environment for the spiral guide groove 301 immediately behind it, avoiding sampling difficulties caused by local compaction. The spiral guide channel 301 is formed on the outer wall of the conical surface of the inlet drill bit 3. Its shape is not a simple straight groove, but a continuous channel extending spirally along the generatrix of the conical surface. In this embodiment, the spiral guide channel 301 preferably adopts a variable cross-section or variable pitch design, that is, the channel depth and width gradually change from the bottom of the drill bit upwards to adapt to the volume expansion or compression characteristics of the bulk particles during the lifting process. This structural design makes the spiral guide channel 301 effectively act as a primary delivery pump. When the inlet drill bit 3 rotates, the channel wall applies tangential friction and normal thrust to the contacted bulk particles, forcing the material to overcome gravity and lateral pressure, and to move upwards in a directional spiral motion along the channel trajectory. Compared with the traditional method of passively overflowing material into the cavity by drill bit extrusion, this active guiding mechanism significantly improves the controllability and continuity of sample introduction, effectively preventing the adhesion and accumulation of sticky soil or wet bulk material on the drill bit surface. The corresponding connection between the upper end of the spiral guide channel 301 and the annular bulk sample inlet 403 is a key detail to ensure sample introduction efficiency. Specifically, the end outlet of the spiral guide channel 301 is precisely aligned with the lower edge opening of the annular bulk sample inlet 403 in both axial height and circumferential position. When the bulk sample is lifted to the top by the spiral guide channel 301, its trajectory precisely cuts into the receiving range of the annular bulk sample inlet 403, achieving a seamless transition from external guidance to internal sample introduction. This precise connection prevents materials from being thrown out due to excessive centrifugal force at the junction or from backflowing and blocking due to abrupt changes in flow direction, ensuring that the vast majority of the collected bulk samples can smoothly enter the subsequent measurement process. Matching the rotation direction of the spiral guide channel 301 with the preset rotation direction of the guide drill bit 3 is a necessary prerequisite for achieving the aforementioned positive pumping effect. Specifically, the preset rotation direction refers to the rotation direction (e.g., clockwise or counterclockwise) when the drilling transmission mechanism 2 drives the guide drill bit 3 to operate normally.The helical helix angle and winding direction of the spiral guide channel 301 must form a right-hand or left-hand helical relationship with the rotation direction, so that the axial component force generated when the drill bit rotates points upward (i.e., towards the direction of the annular bulk sample inlet 403). If the helical direction is designed incorrectly or the assembly is reversed, the rotation of the drill bit will generate a downward slag discharge force instead of an upward material lifting force, causing the bulk material not only to fail to enter the measurement system, but also to be compacted and blocked at the bottom of the drill bit, resulting in a serious sample feeding failure. Therefore, during the manufacturing and assembly process, the helical direction marking of the spiral guide channel 301 and the output direction of the power system must be strictly verified to ensure their consistency.

[0038] Example 10:

[0039] like Figures 1-5 As shown, this embodiment provides an in-situ moisture content measurement method for continuously fed stockpiled bulk materials. This method is applied to the in-situ moisture content measurement device for continuously fed stockpiled bulk materials in any of the aforementioned embodiments. Unlike traditional static sampling or offline detection methods, the core of this method lies in establishing a data processing logic adapted to dynamic continuous drilling conditions. Through a strict time synchronization and transport lag compensation mechanism, it solves the spatiotemporal misalignment problem between the physical transport time of the bulk material sample and the instantaneous acquisition of the electrical signal, thereby ensuring that the generated moisture content curve can truly reflect the distribution characteristics of the stockpiled bulk material 8 along the depth direction. Specifically, the method includes the following steps: In step S100, the continuous feed measurement mechanism 5 is driven by the support feeding mechanism 1 to move along a predetermined direction into the stockpiled bulk material 8. The drilling transmission mechanism 2 drives the guide drill bit 3 to rotate, so that the bulk material sample continuously enters the continuous feed measurement mechanism 5 through the sample feeding mechanism 4. The continuous conveying and discharging mechanism 6 conveys the bulk material sample axially and discharges it through the lateral discharge port 502. This step constitutes the physical basis of the entire measurement method and the bulk material sample flow generation link. The axial feed motion provided by the support feeding mechanism 1 and the rotational motion provided by the drilling transmission mechanism 2 are not independent, but jointly determine the collection rate and filling state of the bulk material sample. During the drilling process, the guide drill bit 3 not only breaks up the bulk material, but also acts as an active pumping unit, forcibly pushing the surrounding bulk material into the sample feeding mechanism 4. At the same time, the continuous conveying and discharging mechanism 6 forms a stable axial lifting flow in the detection chamber, ensuring that the bulk material sample flows through the measurement area in a continuous, dense and controllable flow rate, and is finally discharged from the lateral discharge port 502. This continuous drilling and testing operation mode reduces the efficiency loss and disturbance of bulk samples caused by traditional drilling stoppage sampling, but it also introduces the inherent characteristic of physical transmission time for bulk samples from the inlet to the measurement point, which poses special requirements for subsequent data processing.

[0040] In step S200, the bulk sample within the continuous feed measurement mechanism 5 is detected by the capacitance detection mechanism 7, simultaneously acquiring drilling depth and electrical response signals. The electrical response signals are then conditioned and subjected to no-load reference correction. A unified timestamp is used to achieve time synchronization between the electrical response signals and the drilling depth. Specifically, because the device is in continuous motion, timing deviations can lead to inaccurate depth positioning. Therefore, synchronous acquisition refers to using the same high-precision clock source or hardware trigger signal to record the position information output by the depth encoder and the dielectric response information output by the capacitance sensor at the same time, ensuring that the two types of heterogeneous data have a strictly aligned time reference. Signal conditioning typically includes pre-amplification, bandpass filtering, and analog-to-digital conversion, aiming to extract effective dielectric characteristics and suppress environmental noise.

[0041] Step S210: When the continuous feed measurement mechanism 5 is not filled with bulk samples or is in a specified reference state, acquire the no-load reference parameters. During the measurement process, the acquired electrical response signal is corrected using the no-load reference parameters to eliminate parasitic responses generated by electrodes, cables, and fixed structures. Specifically, the no-load reference parameters are typically acquired during the preheating and stabilization phase after device startup, the suspension self-check phase before each drilling operation, or the reset phase after the device is removed from the stockpiled bulk material 8 and cleaned during continuous measurement intervals. The term "no-load bulk sample" refers to a state where the detection chamber 503 is completely emptied and filled only with air. The specified reference state is a broader calibration condition, such as placing a standard calibration block with a known dielectric constant, dry quartz sand, or other inert reference medium in the detection chamber 503 to verify whether the system's baseline response in a non-air environment meets expectations. During parameter acquisition, the system controls the capacitance detection mechanism 7 to continuously collect multiple sets of data and perform statistical averaging, while simultaneously recording current environmental parameters such as temperature and humidity, thereby constructing a complex-form no-load reference parameter vector containing amplitude and phase information. This parameter essentially characterizes the inherent background impedance composed of all non-sample components, including the upper annular electrode 701, lower annular electrode 702, upper insulating bushing 703, lower insulating bushing 705, insulating protective shoulder 704, insulating sleeve 601, and connecting cable. In actual measurement, the core logic of correction is not a simple scalar value subtraction, but rather vector operations or complex domain subtraction based on the circuit model. Specifically, the system treats the real-time acquired raw electrical response signal as the superposition of the bulk sample response and parasitic response, and extracts the parasitic component introduced by the fixed structure from the raw signal by calling the pre-stored no-load reference parameter. For example, when the device penetrates several meters underground, the cable distributed capacitance changes due to the decrease in soil temperature, or the electrodes undergo slight deformation due to drilling vibration; these factors can cause the parasitic response to deviate from the initial value. If a dynamic correction strategy is adopted, the system can also use a preset temperature drift coefficient model to correct the no-load reference parameters in real time based on synchronously acquired temperature sensor data, and then perform subtraction calculations. This correction mechanism helps decouple structural noise from bulk sample signals, and can extract the net signal reflecting the true dielectric properties of the bulk material, which is beneficial to improving the robustness of measurement results to environmental changes. By assigning a unified and precise timestamp to each set of data, an initial mapping relationship between electrical response and drilling depth in the time domain is established, providing a reliable data foundation for subsequent hysteresis compensation.

[0042] Step S300 involves compensating for the transport lag of the bulk sample in the synchronized electrical response signal based on a preset transport delay parameter, correcting the electrical response signal to the depth corresponding to the actual entry of the bulk sample. This is a key step that distinguishes this method from conventional online detection techniques. Since the bulk sample needs to undergo a physical transport process from the annular bulk sample inlet 403 to the sensitive area where the capacitance detection mechanism 7 is located, the electrical signal acquired at time t actually reflects the properties of the bulk sample that entered the device earlier than time t. Without compensation, directly associating the signal at the current time with the current depth would cause a systematic shift in the measurement results on the depth axis, affecting the accuracy of the moisture content profile. The preset transport delay parameter characterizes the average transport time of the bulk sample from the inlet to the measurement area. This parameter is not subjectively set but is a physically verified value obtained through tracer bulk sample testing. Its magnitude depends on the geometry, rotational speed, and flow characteristics of the bulk sample. The core logic of the compensation algorithm is time backtracking: by calling the preset transport delay parameter, the electrical response signal collected at the current moment is mapped to the drilling depth corresponding to when the bulk sample entered one transport delay earlier than the current moment.

[0043] Step S310 involves calling a preset transport delay parameter to map the electrical response signal acquired at the current moment to the drilling depth corresponding to when the bulk sample entered the site one transport delay earlier than the current moment. The preset transport delay parameter is obtained through calibrated testing of the tracer bulk sample. Specifically, during the execution of the compensation algorithm, the system maintains a synchronous data buffer containing timestamps and drilling depths. When a set of electrical response signals is acquired at time t, the algorithm does not directly associate it with the drilling depth at time t. Instead, based on the preset transport delay parameter Δt, it retrieves or interpolates the drilling depth value corresponding to time (t-Δt) in the buffer and rebinds the electrical response signal to that historical depth point. This time-backtracking mechanism corrects the signal lag effect caused by the length of the mechanical transport path, enabling the final generated depth-moisture content continuous curve to better reflect the true spatial distribution of moisture inside the stockpiled bulk material 8, rather than the dynamic response characteristics of the measuring device itself. Regarding the method for obtaining the preset transport delay parameter, this embodiment specifically emphasizes that it must be obtained through tracer sample testing and calibration to establish an objective empirical basis for the parameter. In practice, at typical operating speeds and feed rates, a tracer substance with significantly distinguishing characteristics, such as dyed particles, metal powder, salt solution pulses, or a standard reference sphere with a known dielectric constant, is instantaneously introduced into the annular bulk sample inlet 403. Subsequently, the output signal is continuously monitored using the capacitance detection mechanism 7 or other dedicated detectors to accurately record the time interval from the moment the tracer substance is introduced to the moment the sensor response reaches a peak or characteristic inflection point.

[0044] Step S400: Based on the compensated electrical response signal and calibration model, the moisture content is continuously calculated, and a depth-moisture content continuous curve is generated. The calibration model is a quantitative conversion relationship between the electrical response value and the moisture content established in advance through laboratory drying loss method, and can be constructed using multinomial regression, neural networks, or other machine learning algorithms. After completing hysteresis compensation, the system inputs the corrected electrical signal corresponding to each depth point into the calibration model to calculate the in-situ moisture content value at that depth. Subsequently, all discrete calculation points are connected in ascending order of depth to generate a high-resolution depth-moisture content continuous curve. This curve not only reflects the macroscopic distribution trend of moisture inside the stockpiled bulk material 8, but also captures microscopic structural features such as local interlayers and moisture migration fronts, providing intuitive and accurate data support for stockpile inventory, quality assessment, and stratified management.

[0045] In step S500, when drilling reaches the preset termination depth, axial feed is stopped, but the continuous conveying and sampling mechanism 6 continues to rotate and acquire electrical response signals for a duration not less than a preset transport delay parameter, ensuring that the bulk samples entering at the termination depth reach the measurement area and complete the measurement. Then, rotation and data acquisition are stopped, the complete measurement results are output and saved, and the lifting device exits the stockpiled bulk material. Specifically, this step ensures that the bulk samples acquired at the deepest location are not missed due to transport delay. Since at the drilling termination point, the last batch of bulk samples entering the detection chamber 503 is still en route from the annular bulk sample inlet 403 to the capacitance detection mechanism 7, if rotation and data acquisition are stopped immediately, this portion of the bulk samples cannot be measured, resulting in data loss in the depth-moisture content curve at the termination depth. By maintaining the continuous conveying and sampling mechanism 6 in rotation and continuously acquiring electrical response signals for at least a preset transport delay parameter, it is ensured that all bulk samples entering at the termination depth are transported to the measurement area and completed, thus guaranteeing the integrity of the depth-moisture content curve at the termination depth. After the delayed data acquisition is completed, the system stops the rotation of the drilling transmission mechanism 2 and the data acquisition of the capacitance detection mechanism 7, and outputs and saves all the depth and moisture content data obtained in this measurement. Subsequently, driven by the support feeding mechanism 1, the device is lifted and withdrawn from the stockpiled bulk material 8, completing the measurement operation.

[0046] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. The present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A continuous-feed in-situ moisture content measuring device for stockpiled bulk materials, characterized in that, include: The system comprises a support feed mechanism, a drilling transmission mechanism, an infeed drill bit, a sample feeding mechanism, a continuous sample feeding and measuring mechanism, a continuous conveying and discharging mechanism, and a capacitance detection mechanism. The support feed mechanism is connected to the continuous sample feeding and measuring mechanism to drive it to move in a predetermined direction. The drilling transmission mechanism is mounted on the support feed mechanism and is connected to the infeed drill bit and the continuous conveying and discharging mechanism to transmit rotational power. The infeed drill bit is located below the continuous sample feeding and measuring mechanism, and the sample feeding mechanism is positioned between the two to allow bulk samples to enter the continuous sample feeding and measuring mechanism. The continuous sample feeding and measuring mechanism has a lateral discharge port on its side, and the continuous conveying and discharging mechanism passes through the continuous sample feeding and measuring mechanism to convey the bulk samples axially and discharge them from the lateral discharge port. The capacitance detection mechanism is located inside the continuous sample feeding and measuring mechanism to detect the bulk samples.

2. The in-situ moisture content measuring device for continuous feed of bulk materials according to claim 1, characterized in that, The continuous feeding and discharging mechanism includes: an insulating sleeve, a spiral conveying blade, and a variable-angle guide blade; the insulating sleeve is made of insulating material; the insulating sleeve is fixed to the drilling transmission mechanism, the spiral conveying blade and the variable-angle guide blade are integrally connected and fixed to the lower and upper ends of the insulating sleeve respectively, the spiral conveying blade is used to continuously convey the bulk sample in the continuous feeding and measuring mechanism from bottom to top along the axial direction of the insulating sleeve, and the variable-angle guide blade is used to guide the bulk sample to the side discharge port.

3. The in-situ moisture content measuring device for continuous feeding of bulk materials according to claim 2, characterized in that, The continuous feed measurement mechanism includes: a cylindrical shell with two lateral discharge ports on the shell, both of which are connected to the detection cavity inside the shell; a spiral conveying blade and a variable angle guide blade, both of which are rotatably fitted into the detection cavity of the cylindrical shell.

4. The in-situ moisture content measuring device for continuous feeding of bulk materials according to claim 3, characterized in that, The inner edge of the variable angle guide vane is connected to the insulating sleeve, and the outer edge of the variable angle guide vane gradually bends and flips radially outward along the axial direction of the insulating sleeve towards the cylindrical outer shell, so that the force exerted by the variable angle guide vane on the bulk sample gradually changes from being mainly axial conveying component to having both axial and radial components; the lateral discharge port corresponds to the guiding area of ​​the variable angle guide vane.

5. The in-situ moisture content measuring device for continuous feeding of bulk materials according to claim 3, characterized in that, The drilling transmission mechanism includes: a brushless DC motor, a gearbox, and multiple transmission shaft bodies interconnected by non-circular cross-section telescopic connectors; both the brushless DC motor and the gearbox are fixed to the support feed mechanism via a power support base; the output end of the brushless DC motor is connected to the gearbox, and the output end of the gearbox is connected to the transmission shaft body located at the top; the transmission shaft body at the top is rotatably connected to a rotary support assembly at the bottom of the support feed mechanism; the transmission shaft body located at the bottom is fixedly connected to the guide drill bit via a drill bit connecting section; an insulating sleeve is coaxially fixedly connected to the transmission shaft body that penetrates into the cylindrical housing, and an axial sealing structure is installed between the transmission shaft body and the central hole at the top of the cylindrical housing; an axial guide support assembly is installed between the transmission shaft body and the central hole at the bottom of the cylindrical housing.

6. The in-situ moisture content measuring device for continuous feeding of bulk materials according to claim 5, characterized in that, The supporting feed mechanism includes: a tripod, a feed drive, a movable slide, a telescopic outer tube, a guide component, and a guide groove; the fixed end of the feed drive is fixed to the support platform of the tripod, the movable end of the feed drive is fixedly connected to the movable slide, and the top of the telescopic outer tube is fixedly connected to the movable slide; the bottom of the telescopic outer tube is fixedly connected to the top of the cylindrical shell, and the drive shaft body passes through the cylindrical shell; the guide component is fixed to the outer end of the movable slide, and the guide groove is opened on the tripod. The guide component and the guide groove slide in a sliding fit to restrict the circumferential rotation of the telescopic outer tube.

7. The in-situ moisture content measuring device for continuous feed of bulk materials according to claim 6, characterized in that, The sample injection mechanism includes a shielding isolation ring and a conical isolation ring; the shielding isolation ring is fixed to the bottom of the cylindrical shell, and the conical isolation ring is fixed to the top of the inlet drill bit, forming an annular bulk sample inlet between the shielding isolation ring and the conical isolation ring; a lower sample injection channel is formed between the shielding isolation ring and the drive shaft body, and the upper part of the lower sample injection channel is connected to the interior of the cylindrical shell.

8. The in-situ moisture content measuring device for continuous feed of bulk materials according to claim 7, characterized in that, The capacitance detection mechanism includes an upper annular electrode and a lower annular electrode. The upper annular electrode is installed inside the cylindrical shell at the top. An upper insulating bushing is provided between the upper annular electrode and the inner wall of the cylindrical shell, and an inner insulating sleeve or insulating gap is provided between the upper annular electrode and the insulating sleeve. An insulating protective shoulder is fixed to the inner wall of one end of the shielding isolation ring inserted into the cylindrical shell. A lower insulating bushing is fixed between the bottom of the insulating protective shoulder and the shielding isolation ring. The lower annular electrode is installed in the annular groove between the top of the insulating protective shoulder and the shielding isolation ring. The lower sample inlet channel forms a transition area near the lower annular electrode, so that the bulk sample gradually changes from the introduction state near the drill bit area to a stable axial conveying state.

9. The in-situ moisture content measuring device for continuous feed of bulk materials according to claim 7, characterized in that, The bottom of the inlet drill bit is a guide tip, and a spiral guide groove is provided on the conical surface of the inlet drill bit. The upper end of the spiral guide groove is connected to the annular bulk sample inlet, and the spiral direction of the spiral guide groove matches the preset rotation direction of the inlet drill bit.

10. A method for measuring the in-situ moisture content of continuously fed bulk stockpiles, applied to the in-situ moisture content measuring device for continuously fed bulk stockpiles as described in any one of claims 1-9, characterized in that, Includes the following steps: The continuous feeding and measuring mechanism is driven by the support feeding mechanism to move into the stockpiled bulk material in a predetermined direction. The drilling transmission mechanism drives the inlet drill bit to rotate, so that the bulk material sample continuously enters the continuous feeding and measuring mechanism through the feeding mechanism. The continuous conveying and discharging mechanism conveys the bulk material sample axially and discharges it through the lateral discharge port. The bulk sample in the continuous feed measurement mechanism is detected by the capacitance detection mechanism, and the drilling depth and electrical response signal are collected simultaneously. The electrical response signal is conditioned and the no-load reference is corrected. The time synchronization of the electrical response signal and the drilling depth is achieved by combining a unified timestamp. Based on the preset transport delay parameter, the synchronized electrical response signal is compensated for the transport lag of the bulk sample, and the electrical response signal is corrected to the depth corresponding to the actual entry of the bulk sample. Based on the compensated electrical response signal and calibration model, the water content is continuously calculated and a depth-water content continuous curve is generated.

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