Portable detection component and method for backfill soil compaction based on high-frequency vibration

Abstract

The present invention relates to the technical field of backfill soil compaction detection, and in particular to a portable backfill soil compaction detection component and method based on high-frequency vibration, comprising a hollow outer gear with an air vent on the top, wherein the inner side of the hollow outer gear is slidably connected to a plurality of evenly arranged sliding rods, the bottom end and the top end of the sliding rod are fixedly connected to a lower probe and a top plate respectively, and the hollow outer gear is hollow for increasing the detection coverage area while reducing the lower probe surface entering the soil. Increasing the detection sample coverage area can increase the detection representativeness, and reducing the lower probe surface entering the soil can reduce the downward force strength provided by the drive box. After the lower probe reaches the set depth, the drive box provides a gradually decreasing downward force until the downward force is insufficient to support the lower probe to continue to probe, which will be detected by the lower probe stopping detection mechanism, and the driving box downward force at this time is recorded and compared with the downward force of the lower probe that cannot be probed under the standard compaction degree of the backfill soil, so as to realize the comparative detection of the compaction degree.

Description

Technical Field

[0001] The present invention relates to the technical field of backfill soil compaction detection, and in particular to a portable backfill soil compaction detection component and method based on high-frequency vibration. Background Art

[0002] Improper selection of backfill compaction method and substandard compaction degree will cause cracks, settlement, looseness and other defects on the bearing surface. Only after the roadbed is fully compacted can the strength of the bearing surface be guaranteed, the bearing level of the bearing surface be enhanced and deformation be reduced. The bearing surface is such as cement surface and asphalt pavement.

[0003] At present, existing compaction detection methods include core drilling method, sand injection method, etc., but the above methods have problems such as low efficiency. Backfill soil is different from the receiving surface. It has a large vertical span, and the compaction between different thickness intervals also has a large difference. Any problem with the compaction at any vertical position will affect the bearing capacity of the receiving surface. The existing compaction detection method is also unable to detect the compaction at different vertical positions.

[0004] The rotation of the eccentric wheel generates vibration, which can be used to provide continuous downward force. When the downward force acts on different vertical levels in the backfill soil, if the compaction degrees on different vertical levels are different, the downward force generated will be different. The present invention uses this feature to achieve comparative detection of the compaction degrees at different vertical positions.

[0005] Therefore, to address the above problems, a portable detection component and method for backfill soil compaction based on high-frequency vibration is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a portable backfill soil compaction detection component and method based on high-frequency vibration to solve the problem raised in the above background technology that "backfill soil is different from the receiving surface. It has a large vertical span, and there is also a large difference in compaction between different thickness intervals. Any problem with compaction at any vertical position will affect the bearing capacity of the receiving surface, and the existing compaction detection method is unable to detect the compaction at different vertical positions."

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable backfill soil compaction detection component based on high-frequency vibration, comprising a hollow outer block with an air vent on the top, a plurality of evenly arranged sliding rods slidably connected to the inner side of the hollow outer block, the bottom and top ends of the sliding rods are respectively fixedly connected to a lower probe and a top plate, the top end of the top plate is fixedly connected to a drive box, and the drive box is used to provide downward force for the lower probe; the hollowness of the hollow outer block is used to increase the detection coverage area while reducing the surface of the lower probe entering the soil. Increasing the detection sample coverage area can increase the representativeness of the detection, and reducing the surface of the lower probe entering the soil can reduce the intensity of the downward force provided by the drive box;

[0008] The bottom end of the probe is in the shape of a "knife blade", and the "knife blade" is relatively blunt, which is used to increase the extrusion force on both sides when the probe is probed. The probe can be probed individually at different depths of backfill soil. The probe can be probed individually, so that no matter how deep the backfill soil is, the friction area encountered by the probe when it is probed is constant, ensuring the accuracy of the compaction test. The cross-sections of the probe and the hollow outer block are both rectangular, and the inner and outer edges of the probe and the hollow outer block are aligned up and down.

[0009] The present invention can significantly improve the efficiency of backfill soil compaction detection and can realize layered compaction detection, which is simple and efficient.

[0010] The portable detection component also includes a lower probe stop detection mechanism, which includes a connecting box fixedly connected to the right side of the top end of the hollow outer gear, a connecting shaft rotatably connected to the inner side of the connecting box, a sensing part fixedly connected to the rear end of the connecting box, and a side plate fixedly connected to the right side of the top plate. After the lower probe reaches the set depth, the drive box provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe to continue to probe downward. It will be detected by the lower probe stop detection mechanism, and the downward pressure of the drive box at this time will be recorded and compared with the downward pressure of the lower probe that cannot be probed under the standard compaction degree of backfill soil, so as to realize the comparative detection of compaction degree.

[0011] As a portable backfill soil compaction detection component based on high-frequency vibration of the present invention, the sensing part is preferably an angular velocity sensor, the input end of the angular velocity sensor is fixedly connected to one end of the connecting shaft, and the lower probe stop detection mechanism also includes a winding wheel fixedly connected to the outside of the connecting shaft, and a connecting rope is fixed and wrapped around the outside of the winding wheel, and the other end of the connecting rope passes through the inner side of the connecting box and is fixedly connected to the bottom end of the side panel.

[0012] As a preferred embodiment of the portable detection component for backfill compaction based on high-frequency vibration of the present invention, a connecting ring is fixedly connected to the inner side of the connecting box, a spring is provided on the inner side of the connecting ring, and the two ends of the spring are fixedly connected to the inner side of the connecting ring and the outer side of the connecting shaft respectively. In the initial stage of detection, the top plate is separated from the top of the hollow outer gear, and the spring is in a power storage state. When the lower probe moves downward, the spring drives the connecting shaft to reset clockwise. The clockwise rotation of the connecting shaft can be sensed by the angular velocity sensor and recorded as a positive angular velocity. The angular velocity is a vector. When the positive angular velocity remains at 0 for half a minute, it indicates that the downward force is insufficient to support the lower probe to continue to probe. Among them, because the drive box will vibrate when working, the vibration may cause the lower probe to float temporarily. When floating, the connecting shaft rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity. The controller does not record the generated negative angular velocity.

[0013] As a portable backfill soil compaction degree detection component based on high-frequency vibration of the present invention, the sensing part is preferably a turn counter, the input end of the turn counter is fixedly connected to one end of the connecting shaft, and there is a certain damping force between the connecting shaft and the connecting box. The lower probe stop detection mechanism also includes a winding wheel rotatably connected to the outside of the connecting shaft, and the bottom end of the side plate is fixedly connected to a friction plate, which extends downward into the inner side of the connecting box and fits with the outer side of the winding wheel. The up and down movement of the lower probe can drive the winding wheel to rotate back and forth through the friction plate.

[0014] As a portable detection component for backfill compaction based on high-frequency vibration of the present invention, preferably, a ratchet is fixedly connected to the outer side of the connecting shaft, and the corresponding sensitivity of the ratchet and pawl can be increased by increasing the density of the ratchet. The inner side of the winding wheel is connected to the pawl through a hinge rotation, and a torsion spring is fixedly connected between the pawl and the inner side of the winding wheel. When the lower probe moves downward, the pawl is stuck on the ratchet and drives the connecting shaft to rotate. At this time, the turn counter counts, and when the lower probe moves upward, the pawl will slide over the ratchet. The ratchet and pawl are used to filter out the upward jitter that occurs when the drive box drives the lower probe to work. When the reading of the turn counter no longer increases within half a minute, it indicates that the downward force is insufficient to support the lower probe to continue to move downward.

[0015] Under the above settings, the downward movement of the lower probe drives the friction plate downward, and the friction plate drives the winding wheel to rotate clockwise. The pawl is stuck on the ratchet and drives the connecting shaft to rotate. At this time, the circle counter counts. When the reading of the circle counter no longer increases within half a minute, it indicates that the downward force is insufficient to support the lower probe to continue to move downward.

[0016] As a preferred embodiment of the portable backfill soil compaction detection component based on high-frequency vibration of the present invention, the outer sides of the front and rear ends of the hollow outer gear are fixedly connected with pressure plates, and the hollow outer gear is operated by the pressure plates. The top of the drive box is fixedly connected with a controller, and the inner side of the top of the drive box is fixedly connected with a drive motor. The drive motor is a constant-speed motor, and the end of the main shaft of the drive motor is fixedly connected with a first bevel gear. The inner sides of the left and right ends of the drive box are fixedly connected with support rings, and the inner side of the top of each support ring is rotatably connected to a second bevel gear through a rotating shaft. The left and right second bevel gears are respectively engaged with the left and right sides of the first bevel gear, so that the left and right second bevel gears rotate in opposite directions.

[0017] As a preferred portable detection component for backfill compaction based on high-frequency vibration of the present invention, each second bevel gear is coaxially fixedly connected to an eccentric wheel, the eccentric directions of the two eccentric wheels are opposite, the eccentric direction of the eccentric wheel is perpendicular to the long side of the hollow outer gear, and the vibration in the eccentric direction is reduced by increasing the area of the long side. When the eccentric wheel rotates, the drive box generates downward pressure, and the rectangular hollow outer gear can effectively play a limiting role when it is probed downward, and can increase the verticality when it is probed downward; the eccentric directions of the two eccentric wheels are opposite, and the rotation directions of the two eccentric wheels are also opposite. This setting is used to reduce the vibration in the eccentric direction, increase the vibration in the up and down directions, and increase the downward pressure.

[0018] As a preferred portable backfill soil compaction detection component based on high-frequency vibration of the present invention, a slide groove is opened on the inner side of the eccentric wheel, and a slider is slidably connected to the inner side of the slide groove. The downward pressure of the drive box is changed by changing the position of the slider in the slide groove. A second motor is fixedly connected to the slider, and a screw is fixedly connected to the end of the main shaft of the second motor. The outer side of the screw is spirally connected to the inner side of the slider, and the position adjustment of the slider is achieved by the rotation of the second motor.

[0019] As a preferred portable detection component for backfill soil compaction based on high-frequency vibration of the present invention, a potentiometer is fixedly connected to the inner side of the edge of the slide, and a synchronization block is fixedly connected to the center position of the edge of the slider. The synchronization block slides on the potentiometer, and the specific position of the slider is obtained through the potentiometer.

[0020] The backfill soil compaction detection method based on high-frequency vibration includes the following steps:

[0021] Step 1: Insert the detection assembly into the backfill soil depth to be detected by operating the pressure plate. Even if the lower probe reaches the detection depth, during the insertion process, the top of the lower probe will come into interference contact with the bottom of the hollow outer stop.

[0022] Step 2: In the initial position, the slider is at the end position in the slide groove away from the axis, and the drive box starts to work. The drive box generates downward pressure to make the lower probe go down. During this process, the position of the slider is continuously changed by the second motor so that the position of the slider gradually approaches the axis. The drive box provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe to continue to probe downward, and it will be detected by the lower probe stop detection mechanism.

[0023] Step 3: Obtain and record, through a potentiometer, the position of the slider in the chute when the lower probe member stop detection mechanism detects that the lower probe member has stopped in step 2.

[0024] Step 4: Place the test assembly under the standard compaction of backfill soil for testing, repeat steps 2 to 3 above, and obtain and record the position of the slider in the chute when the test assembly is tested under the standard compaction of backfill soil.

[0025] Step 5: Set the distance between the slider and the axis in step 3 as S2, and set the distance between the slider and the axis in step 4 as S1. When S2 is greater than S1, it means that the tested backfill soil compaction is greater than the standard compaction of the backfill soil. When S2 is less than S1, it means that the tested backfill soil compaction is less than the standard compaction of the backfill soil.

[0026] In actual operation, the detection of step 4 and S1 can be completed first, and then the detection of different depth detection points can be performed again. The present invention is powered by an external power supply.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The portable backfill soil compaction detection component based on high-frequency vibration has a "blade"-shaped bottom end of the probe, and the "blade" is relatively blunt, which is used to increase the extrusion force on both sides when the probe is lowered. The probe can be lowered individually at different depths of the backfill soil. The probe can be lowered individually, so that no matter how deep the backfill soil is, the friction area encountered by the probe is constant, ensuring the accuracy of the compaction test. The cross-sections of the probe and the hollow outer block are both rectangular.

[0029] 2. The portable backfill soil compaction detection component based on high-frequency vibration, the probe stop detection mechanism includes a connecting box fixedly connected to the right side of the top of the hollow outer gear, a connecting shaft rotatably connected to the inner side of the connecting box, a sensing part fixedly connected to the rear end of the connecting box, and a side plate fixedly connected to the right side of the top plate. After the probe reaches the set depth, the drive box provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the probe to continue to probe downward. It will be detected by the probe stop detection mechanism, and the drive box downward pressure at this time will be recorded and compared with the downward pressure at which the probe cannot probe downward under the standard compaction of the backfill soil, so as to realize the comparative detection of compaction.

[0030] 3. This high-frequency vibration-based portable backfill compaction detection component, in the initial stage of the test, separates the top plate from the top of the hollow outer stop, and the spring is in a charged state. As the probe descends, the spring drives the connecting shaft to reset clockwise. The clockwise rotation of the connecting shaft can be sensed by the angular velocity sensor and recorded as a positive angular velocity. If the positive angular velocity remains at zero for half a minute, it indicates that the downward force is insufficient to support the probe to continue descending. Because the drive box vibrates during operation, this vibration may cause the probe to float briefly. During this floating period, the connecting shaft rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity, which the controller does not record.

[0031] 4. This portable backfill soil compaction detection component based on high-frequency vibration, the downward movement of the probe drives the friction plate downward, the friction plate drives the winding wheel to rotate clockwise, the pawl is stuck on the ratchet and drives the connecting shaft to rotate, at this time, the circle counter counts, when the reading of the circle counter no longer increases within half a minute, it indicates that the downward force is insufficient to support the probe to continue to explore.

[0032] 5. In this portable backfill soil compaction detection component based on high-frequency vibration, the eccentric direction of the eccentric wheel is perpendicular to the long side of the hollow outer gear. The vibration in the eccentric direction is reduced by increasing the area of the long side. When the eccentric wheel rotates, the drive box generates downward pressure. The rectangular hollow outer gear can effectively play a limiting role when it is probed downward, which can increase the verticality when it is probed downward. The eccentric directions of the two eccentric wheels are opposite, and the rotation directions of the two eccentric wheels are also opposite. This setting is used to reduce the vibration in the eccentric direction, increase the vibration in the up and down directions, and increase the downward pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention.

[0034] Figure 2 This is a schematic diagram of the appearance structure of the lower probe of the present invention.

[0035] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0036] Figure 4 For the present invention Figure 3 Schematic diagram of the installation structure at point A in the figure.

[0037] Figure 5 For the present invention Figure 3 Schematic diagram of the installation structure at point B in the figure.

[0038] Figure 6 It is a schematic diagram of the directions of the eccentric wheels on the front and rear sides of the present invention.

[0039] Figure 7 It is a schematic diagram of the installation structure inside the eccentric wheel of the present invention.

[0040] Figure 8 For the present invention Figure 7 Schematic diagram of the installation structure at point C in the figure.

[0041] Figure 9 Schematic diagram of the installation structure of the winding wheel in the first embodiment of the present invention.

[0042] Figure 10 Schematic diagram of the installation structure of the mainspring connected to the connecting ring in the first embodiment of the present invention.

[0043] Figure 11Schematic diagram of the installation structure of the friction plate of the second embodiment of the present invention.

[0044] Figure 12 Schematic diagram of the installation structure of the winding wheel in the second embodiment of the present invention.

[0045] Figure 13 Schematic diagram of the installation structure of the ratchet in the second embodiment of the present invention.

[0046] Figure 14 For the present invention Figure 11 Schematic diagram of the installation structure at D in the figure.

[0047] Figure 15 This is a schematic structural diagram of the initial detection stage of the present invention.

[0048] Figure 16 It is a structural schematic diagram of the detection process of the present invention.

[0049] In the figure: 1. Hollow outer gear; 2. Probe; 3. Pressure plate; 4. Top plate; 5. Slide rod; 6. Drive box; 7. Controller; 8. Side plate; 9. Connecting box; 10. Induction part; 11. Air vent; 12. Drive motor; 13. First bevel gear; 14. Support ring; 15. Ratchet; 16. Torsion spring; 17. Connecting rope; 18. Winding wheel; 19. Connecting shaft; 20. Eccentric wheel; 21. Second bevel gear; 22. Connecting ring; 23. Spring; 24. Backfill soil; 25. Ratchet; 26. Friction plate; 201. Second motor; 202. Slide groove; 203. Screw; 204. Potentiometer; 205. Slider; 206. Synchronous block. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] Example 1, please refer to Figures 1-10 、 Figure 15 and Figure 16 , the present invention provides a technical solution:

[0052] A portable detection component and method for the compaction degree of backfill soil based on high-frequency vibration, a portable detection component for the compaction degree of backfill soil based on high-frequency vibration, comprising a hollow outer gear 1 with an air vent 11 on the top, a plurality of evenly arranged sliding rods 5 being slidably connected on the inner side of the hollow outer gear 1, the bottom and top ends of the sliding rods 5 being fixedly connected with a lower probe 2 and a top plate 4 respectively, the top end of the top plate 4 being fixedly connected with a drive box 6, the drive box 6 being used to provide downward pressure for the lower probe 2; the hollow outer gear 1 is hollow and is used to increase the detection coverage area while reducing the surface of the lower probe 2 entering the soil, increasing the detection sample coverage area can increase the detection representativeness, and reducing the surface of the lower probe 2 entering the soil can reduce the downward pressure intensity provided by the drive box 6.

[0053] The bottom end of the probe 2 is in the shape of a "knife blade", and the "knife blade" is relatively blunt, which is used to increase the extrusion force on both sides of the probe 2 when it is probed. The probe 2 can be probed individually at different depths of the backfill soil 24. The probe 2 can be probed individually, so that no matter how deep the backfill soil is, the friction area encountered by the probe 2 when it is probed is constant, thereby ensuring the accuracy of the compaction test. The cross-sections of the probe 2 and the hollow outer block 1 are both rectangular, and the inner and outer edges of the probe 2 and the hollow outer block 1 are aligned up and down.

[0054] The portable detection component also includes a lower probe stop detection mechanism, which includes a connecting box 9 fixedly connected to the right side of the top of the hollow outer gear 1, a connecting shaft 19 rotatably connected to the inner side of the connecting box 9, a sensing part 10 fixedly connected to the rear end of the connecting box 9, and a side plate 8 fixedly connected to the right side of the top plate 4. After the lower probe 2 reaches the set depth, the drive box 6 provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe 2 to continue to probe downward, which will be detected by the lower probe stop detection mechanism. The downward pressure of the drive box 6 at this time is recorded and compared with the downward pressure of the lower probe 2 that cannot be probed downward under the standard compaction degree of backfill soil 24, so as to realize the comparison detection of compaction degree.

[0055] The greater the degree of compaction of the backfill soil 24 , the greater the force required for the lowering member 2 to lower.

[0056] As a portable backfill soil compaction detection component based on high-frequency vibration of the present invention, the sensing part 10 is preferably an angular velocity sensor, the input end of the angular velocity sensor is fixedly connected to one end of the connecting shaft 19, and the lower probe stop detection mechanism also includes a winding wheel 18 fixedly connected to the outside of the connecting shaft 19, and a connecting rope 17 is fixed and wound on the outside of the winding wheel 18, and the other end of the connecting rope 17 passes through the inner side of the connecting box 9 and is fixedly connected to the bottom end of the side panel 8.

[0057] As a preferred embodiment of the portable detection component for backfill compaction based on high-frequency vibration of the present invention, a connecting ring 22 is fixedly connected to the inner side of the connecting box 9, a spring 23 is provided on the inner side of the connecting ring 22, and the two ends of the spring 23 are fixedly connected to the inner side of the connecting ring 22 and the outer side of the connecting shaft 19 respectively. In the initial stage of detection, the top plate 4 is separated from the top of the hollow outer gear 1, and the spring 23 is in a power storage state. When the lower probe 2 moves downward, the spring 23 drives the connecting shaft 19 to reset clockwise. The clockwise rotation of the connecting shaft 19 can be sensed by the angular velocity sensor and recorded as a positive angular velocity. The angular velocity is a vector. When the positive angular velocity is continuously 0 for half a minute, it indicates that the downward force is insufficient to support the lower probe 2 to continue to probe. Among them, because the drive box 6 will generate vibration during operation, the vibration may cause the lower probe 2 to float temporarily. When floating, the connecting shaft 19 rotates counterclockwise, and the angular velocity sensor generates a negative angular velocity. The controller 7 does not record the generated negative angular velocity.

[0058] As a preferred portable detection component for backfill compaction based on high-frequency vibration of the present invention, the outer sides of the front and rear ends of the hollow outer gear 1 are fixedly connected with pressure plates 3, and the hollow outer gear 1 is operated by the pressure plates 3. The top of the drive box 6 is fixedly connected with a controller 7, and the inner side of the top of the drive box 6 is fixedly connected with a drive motor 12. The drive motor 12 is a constant-speed motor, and the end of the main shaft of the drive motor 12 is fixedly connected with a first bevel gear 13. The inner sides of the left and right ends of the drive box 6 are fixedly connected with support rings 14, and the inner side of the top of each support ring 14 is rotatably connected to a second bevel gear 21 through a rotating shaft. The left and right second bevel gears 21 are respectively engaged with the left and right sides of the first bevel gear 13, so that the left and right second bevel gears 21 rotate in opposite directions.

[0059] As a portable detection component for backfill compaction based on high-frequency vibration of the present invention, preferably, each second bevel gear 21 is coaxially fixedly connected to an eccentric wheel 20, and the eccentric directions of the two eccentric wheels 20 are opposite. The eccentric direction of the eccentric wheel 20 is perpendicular to the long side of the hollow outer gear 1, and the vibration in the eccentric direction is reduced by increasing the area of the long side. When the eccentric wheel 20 rotates, the drive box 6 generates downward pressure, and the rectangular hollow outer gear 1 can effectively play a limiting role when it is probed downward, and can increase the verticality when it is probed downward; the eccentric directions of the two eccentric wheels 20 are opposite, and the rotation directions of the two eccentric wheels 20 are also opposite. This setting is used to reduce the vibration in the eccentric direction, increase the vibration in the up and down directions, and increase the downward pressure.

[0060] As a preferred portable backfill soil compaction detection component based on high-frequency vibration of the present invention, a slide groove 202 is opened on the inner side of the eccentric wheel 20, and a slider 205 is slidably connected to the inner side of the slide groove 202. The downward pressure of the drive box 6 is changed by changing the position of the slider 205 in the slide groove 202. A second motor 201 is fixedly connected to the slider 205, and a screw 203 is fixedly connected to the end of the main shaft of the second motor 201. The outer side of the screw 203 is spirally connected to the inner side of the slider 205, and the position adjustment of the slider 205 is achieved by rotating the second motor 201.

[0061] As a preferred portable detection component for backfill compaction based on high-frequency vibration of the present invention, a potentiometer 204 is fixedly connected to the inner side of the edge of the slide 202, and a synchronization block 206 is fixedly connected to the center position of the edge of the slider 205. The synchronization block 206 slides on the potentiometer 204, and the specific position of the slider 205 is obtained through the potentiometer 204.

[0062] Example 2: This example is an alternative to Example 1. Figures 1-4 、 Figure 6-Figure 8 and Figure 11-14 The sensing part 10 is a turn counter. The input end of the turn counter is fixedly connected to one end of the connecting shaft 19. There is a certain damping force between the connecting shaft 19 and the connecting box 9. The lower probe stop detection mechanism also includes a winding wheel 18 that is rotatably connected to the outside of the connecting shaft 19. The bottom end of the side plate 8 is fixedly connected to a friction plate 26. The friction plate 26 extends downward into the inner side of the connecting box 9 and fits into the outer side of the winding wheel 18. The up and down movement of the lower probe 2 can drive the winding wheel 18 to rotate back and forth through the friction plate 26.

[0063] As a portable backfill compaction detection component based on high-frequency vibration of the present invention, preferably, a ratchet 25 is fixedly connected to the outer side of the connecting shaft 19, and the corresponding sensitivity of the ratchet 25 and the pawl 15 can be increased by increasing the density of the ratchet 25. The inner side of the winding wheel 18 is connected to the pawl 15 through a hinge rotation, and a torsion spring 16 is fixedly connected between the pawl 15 and the inner side of the winding wheel 18. When the lower probe 2 descends, the pawl 15 is stuck on the ratchet 25 and drives the connecting shaft 19 to rotate. At this time, the turn counter counts, and when the lower probe 2 ascends, the pawl 15 will slide over the ratchet 25. The ratchet 25 and the pawl 15 are used to filter out the upward jitter that occurs when the drive box 6 drives the lower probe 2 to work. When the reading of the turn counter no longer increases within half a minute, it indicates that the downward force is insufficient to support the lower probe 2 to continue to descend.

[0064] Under the above setting, the downward movement of the lower probe 2 drives the friction plate 26 downward, and the friction plate 26 drives the winding wheel 18 to rotate clockwise. The pawl 15 is stuck on the ratchet 25 and drives the connecting shaft 19 to rotate. At this time, the circle counter counts. When the reading of the circle counter no longer increases within half a minute, it indicates that the downward force is insufficient to support the lower probe 2 to continue to explore.

[0065] The present invention also discloses a backfill soil compaction detection method based on high-frequency vibration, the steps of which are:

[0066] Step 1: Insert the detection component to the depth of the backfill soil 24 to be detected by operating the pressure plate 3. Even if the lower probe 2 reaches the detection depth, at this time, during the insertion process, the top end of the lower probe 2 will be in interference contact with the bottom end of the hollow outer stop 1.

[0067] Step 2: In the initial position, the slider 205 is at the end position away from the axis in the slide groove 202, and the drive box 6 starts to work. The drive box 6 generates downward pressure to make the lower probe 2 move downward. During this process, the position of the slider 205 is continuously changed by the second motor 201, so that the position of the slider 205 gradually approaches the axis, and the drive box 6 provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe 2 to continue to move downward, and it will be detected by the lower probe stop detection mechanism.

[0068] Step 3: Obtain and record, through the potentiometer 204 , the position of the slider 205 in the chute 202 when the lower probe 2 stops as detected by the lower probe stop detection mechanism in step 2 .

[0069] Step 4: Place the detection component under the backfill soil 24 standard compaction degree for testing, repeat the above steps 2 to 3, obtain and record the position of the slider 205 in the chute 202 when the detection component is tested under the backfill soil 24 standard compaction degree.

[0070] Step 5: Set the distance between the slider 205 and the axis in step 3 as S2, and set the distance between the slider 205 and the axis in step 4 as S1. When S2 is greater than S1, it means that the compaction degree of the backfill soil 24 tested is greater than the standard compaction degree of the backfill soil 24. When S2 is less than S1, it means that the compaction degree of the backfill soil 24 tested is less than the standard compaction degree of the backfill soil 24.

[0071] In actual operation, the detection of step 4 and S1 can be completed first, and then the detection of different depth detection points can be performed again. The present invention is powered by an external power supply.

[0072] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A portable backfill soil compaction detection component based on high-frequency vibration, characterized by: The invention comprises a hollow outer stop (1) with an air vent (11) on the top and a lower probe stop detection mechanism, wherein the inner side of the hollow outer stop (1) is slidably connected to a plurality of uniformly arranged slide bars (5), the bottom end and the top end of the slide bar (5) are respectively fixedly connected to the lower probe (2) and the top plate (4), the top end of the top plate (4) is fixedly connected to a drive box (6), the drive box (6) is used to provide downward pressure for the lower probe (2), the bottom end of the lower probe (2) is in the shape of a "knife blade", and the lower probe (2) can be independently probed at different depths in the backfill soil (24), the cross-sections of the lower probe (2) and the hollow outer stop (1) are both rectangular, and the inner edges and outer edges of the lower probe (2) and the hollow outer stop (1) are aligned up and down; The lower probe member stop detection mechanism includes a connection box (9) fixedly connected to the right side of the top of the hollow outer gear (1), a connection shaft (19) rotatably connected to the inner side of the connection box (9), a sensing member (10) fixedly connected to the rear end of the connection box (9), and a side plate (8) fixedly connected to the right side of the top plate (4). After the lower probe member (2) reaches the set depth, the driving box (6) provides a gradually decreasing downward pressure until the downward pressure is insufficient to support the lower probe member (2) to continue to probe downward. The lower probe member stop detection mechanism detects the situation, records the downward pressure of the driving box (6) at this time, and compares it with the downward pressure of the lower probe member (2) that cannot be probed downward under the standard compaction degree of the backfill soil (24), so as to realize the comparison detection of the compaction degree. The sensing member (10) is a circle. A counter, an input end of the turn counter is fixedly connected to one end of the connecting shaft (19), the lower probe stop detection mechanism also includes a winding wheel (18) rotatably connected to the outer side of the connecting shaft (19), a friction plate (26) is fixedly connected to the bottom end of the side plate (8), a ratchet (25) is fixedly connected to the outer side of the connecting shaft (19), the inner side of the winding wheel (18) is rotatably connected to a pawl (15) through a hinge, a torsion spring (16) is fixedly connected between the pawl (15) and the inner side of the winding wheel (18), when the lower probe (2) moves upward, the pawl (15) slides over the ratchet (25), and the ratchet (25) and the pawl (15) are used to filter out the upward jitter that occurs when the drive box (6) drives the lower probe (2) to work; The driving box (6) includes two eccentric wheels (20) with opposite eccentric directions. The eccentric directions of the eccentric wheels (20) are perpendicular to the long sides of the hollow outer gear (1). When the eccentric wheels (20) rotate, the driving box (6) generates downward pressure.

2. The portable backfill soil compaction detection assembly based on high-frequency vibration according to claim 1, characterized in that: The friction plate (26) extends downward into the inner side of the connection box (9) and fits with the outer side of the winding wheel (18). The up and down movement of the lower probe (2) can drive the winding wheel (18) to rotate back and forth through the friction plate (26).

3. The portable backfill soil compaction detection component based on high-frequency vibration according to claim 2, characterized in that: When the lower probe (2) moves downward, the pawl (15) is stuck on the ratchet (25) and drives the connecting shaft (19) to rotate. At this time, the circle counter counts. When the reading of the circle counter no longer increases within half a minute, it indicates that the downward pressure is insufficient to support the lower probe (2) to continue to move downward.

4. The portable backfill soil compaction detection component based on high-frequency vibration according to any one of claims 1 to 3, characterized in that: The outer sides of the front and rear ends of the hollow outer gear (1) are fixedly connected with a pressure plate (3), and the hollow outer gear (1) is operated by the pressure plate (3). The top of the drive box (6) is fixedly connected with a controller (7), and the inner side of the top of the drive box (6) is fixedly connected with a drive motor (12). The drive motor (12) is a constant speed motor, and the end of the main shaft of the drive motor (12) is fixedly connected with a first bevel gear (13). The inner sides of the left and right ends of the drive box (6) are fixedly connected with support rings (14). The inner side of the top of each support ring (14) is rotatably connected to a second bevel gear (21) through a rotating shaft. The left and right second bevel gears (21) are respectively engaged with the left and right sides of the first bevel gear (13), so that the left and right second bevel gears (21) rotate in opposite directions.

5. The portable backfill soil compaction detection assembly based on high-frequency vibration according to claim 4, characterized in that: Each second bevel gear (21) is coaxially fixedly connected to an eccentric wheel (20).

6. The portable backfill soil compaction detection assembly based on high-frequency vibration according to claim 5, characterized in that: A slide groove (202) is provided on the inner side of the eccentric wheel (20), and a slider (205) is slidably connected to the inner side of the slide groove (202). The downward force of the drive box (6) is changed by changing the position of the slider (205) in the slide groove (202). A second motor (201) is fixedly connected to the slider (205). A screw (203) is fixedly connected to the end of the main shaft of the second motor (201). The outer side of the screw (203) is spirally connected to the inner side of the slider (205). The position of the slider (205) is adjusted by the rotation of the second motor (201).

7. The portable backfill soil compaction detection assembly based on high-frequency vibration according to claim 6, characterized in that: A potentiometer (204) is fixedly connected to the inner side of the edge of the slide groove (202), and a synchronization block (206) is fixedly connected to the center position of the edge of the slider (205). The synchronization block (206) slides on the potentiometer (204) to obtain the specific position of the slider (205) through the potentiometer (204).

8. A backfill soil compaction detection method based on high-frequency vibration, characterized in that: The portable backfill soil compaction detection assembly according to claim 7 is used, and the steps are: Step 1: insert the detection assembly into the depth of the backfill soil (24) to be detected by operating the pressure plate (3). Even if the lower probe (2) reaches the detection depth, at this time, during the insertion process, the top end of the lower probe (2) will come into interference contact with the bottom end of the hollow outer stop (1); Step 2: In the initial position, the slider (205) is at the end position away from the axis in the slide groove (202), and the drive box (6) starts to work. The drive box (6) generates a downward force to make the lower probe (2) move downward. During this process, the position of the slider (205) is continuously changed by the second motor (201), so that the position of the slider (205) gradually approaches the axis. The drive box (6) provides a gradually decreasing downward force until the downward force is insufficient to support the lower probe (2) to continue to move downward, and it is detected by the lower probe stop detection mechanism; Step 3: obtaining and recording the position of the slider (205) in the chute (202) when the lower probe (2) stops as detected by the lower probe stop detection mechanism in step 2 through the potentiometer (204); Step 4: Place the detection component under the backfill soil (24) at the standard compaction degree for detection, repeat the above steps 2 to 3, and obtain and record the position of the slider (205) in the chute (202) when the detection component is tested under the backfill soil (24) at the standard compaction degree; Step 5: The distance between the slider (205) and the axis in step 3 is set as S2, and the distance between the slider (205) and the axis in step 4 is set as S1. When S2 is greater than S1, it indicates that the compaction degree of the backfill soil (24) detected is greater than the standard compaction degree of the backfill soil (24). When S2 is less than S1, it indicates that the compaction degree of the backfill soil (24) detected is less than the standard compaction degree of the backfill soil (24).

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