Flexible dual-mode sensor mounting rack for mine pressure monitoring

Abstract

The invention relates to the technical field of flexible sensing, and discloses a flexible dual-mode sensor mounting rack for mine pressure monitoring, which comprises a fixing rack, and the fixing rack is connected with a mounting fixing mechanism, so that the flexible dual-mode sensor can be mounted. The angle direction and the height of the flexible bimodal sensor can be adjusted, the monitoring range is expanded, fixed installation is firm, electrode materials used by most flexible sensors are metal, most organic solvents cannot be attached to the metal, and therefore the flexible bimodal sensor is not prone to damage. The problems that the electrode is not firmly pasted or the electrode is layered and falls off after being repeatedly bent for multiple times exist, inconvenience is brought to industrial production and daily life, any desired electrode shape can be carved on the surface of an organic polymer film by using a laser-induced graphene method, it is guaranteed that an electrode layer is tightly attached to a sensitive layer, and the surface of the sensitive layer is not damaged. And the shape can be customized according to applicable occasions.

Description

Technical Field

[0001] The invention belongs to the technical field of flexible sensing, and in particular relates to a flexible dual-mode sensor mounting frame for mine pressure monitoring. Background Art

[0002] At present, flexible sensors have been widely used in scenarios where rigid sensors cannot be used, such as the surface of coal mine robots and human skin, due to their advantages such as good flexibility and strong bending resistance. Flexible sensors with single functions have achieved great success, but there are currently two problems that restrict the further development of flexible sensors: First, the electrode materials used in most flexible sensors are metals, and most organic solvents cannot adhere to metals. There will be problems such as loose electrode adhesion or electrode delamination after repeated bending, which will cause inconvenience to industrial production and daily life; second, the functions of most flexible sensors are too single, that is, they can only output one signal, which cannot meet the measurement requirements well. In addition, the current flexible dual-mode sensor mounting frame is relatively fixed when installing the flexible dual-mode sensor, which is not easy to adjust, resulting in a limited monitoring range. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a flexible dual-mode sensor mounting bracket for mine pressure monitoring, which effectively solves the problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flexible dual-modal sensor mounting bracket for mine pressure monitoring, comprising a fixing bracket, the fixing bracket being connected to a mounting and fixing mechanism, the mounting and fixing mechanism being used to fix the fixing bracket on a mine wall, the fixing bracket being connected to a lifting mechanism, the lifting mechanism being used to drive an installation box to lift and lower, so as to facilitate monitoring of mine pressure, the installation box being provided with a mine pressure monitoring mechanism, the mine pressure monitoring mechanism being used to install a flexible dual-modal sensor and monitor mine pressure, the installation box being provided with a closing mechanism, the closing mechanism being used to close the installation box, the installation box being connected to a dust removal mechanism, the dust removal mechanism being used to remove dust from the surface of the flexible dual-modal sensor to prevent affecting monitoring.

[0005] Preferably, the installation and fixing mechanism includes a fixed gear cavity symmetrically arranged in the fixed frame, a fixed driving gear shaft is rotatably connected between the end walls of the fixed gear cavity, the fixed driving gear shaft is connected to the fixed motor power output shaft, the fixed motor is fixedly installed in the fixed frame, the outer surface of the fixed driving gear shaft is fixedly connected to a fixed driving gear, the fixed driving gear is meshed with a fixed driven gear, the fixed driven gear is fixedly installed on the outer surface of the fixed rotating shaft, a fixed drill bit is fixedly connected to the upper part of the fixed rotating shaft, the fixed rotating shaft penetrates and is rotatably installed on the upper end wall of the fixed gear cavity, The interior of the fixed rotating shaft is a hollow structure, a screw is fixedly connected to the bottom wall of the fixed gear cavity, the outer surface of the screw is threadedly connected to a threaded sleeve, the threaded sleeve is slidably connected to the fixed rotating shaft, the screw is located inside the fixed rotating shaft, the capstan drives the tightening slide bar to move, the tightening slide bar penetrates and is slidably connected to the fixed rotating shaft, a plurality of tightening slide bars are provided, the inner end of the tightening slide bar is processed into a spherical shape, the outer end of the tightening slide bar is fixedly connected to a tightening cone, a spring is clamped between the tightening cone and the fixed rotating shaft, the tightening cone is tightened on the fixed rock wall to prevent sliding.

[0006] Preferably, the lifting mechanism includes a lifting cavity symmetrically arranged in the fixed frame, a lifting gear cavity is arranged in the fixed frame, the lifting gear cavity is located between the lifting cavities, a lifting driving gear shaft is rotatably connected between the end walls of the lifting gear cavity, the lifting driving gear shaft is connected to the power output shaft of the lifting motor, the lifting motor is fixedly installed in the fixed frame, a lifting driving gear is fixedly connected to the outer surface of the lifting driving gear shaft, the lifting driving gear is meshed with the lifting driven gear, the lifting driven gear is fixedly installed on the outer surface of the lifting shaft, the lifting shaft extends into the lifting cavity, the outer surface of the lifting shaft in the lifting cavity is fixedly connected to a winch, and the outer surface of the winch is wound around A lifting rope is connected, and the end of the lifting rope is fixedly connected with a threaded column, and the threaded column is threadedly connected to the threaded tube, and the threaded tube is fixedly installed on the upper part of the bracket, and the bracket is inserted into a slot provided at the lower part of the fixed bracket, and the lower part of the bracket is fixedly connected with a movable bracket, and a movable slide groove is provided on the bottom wall of the movable bracket, and a movable screw rod is rotatably connected between the end walls of the movable slide groove, and the movable screw rod is connected to a power output shaft of a movable motor fixedly installed in the movable bracket, and a movable nut block is threadedly connected to the outer surface of the movable screw rod, and the movable nut block is slidably connected between the end walls of the movable slide groove, and a direction adjustment mechanism is connected to the lower part of the movable nut block, and the direction adjustment mechanism is used to adjust the direction of the installation box.

[0007] Preferably, the direction adjustment mechanism includes a direction adjustment box fixedly connected to the lower portion of the movable nut block, a stabilizing plate symmetrically fixedly connected to the upper portion of the direction adjustment box, the stabilizing plate being slidably connected to the movable frame, a direction adjustment gear shaft being arranged in the direction adjustment box, a direction adjustment main gear shaft being rotatably connected between the end walls of the direction adjustment gear shaft, a direction adjustment main gear shaft being rotatably connected between the end walls of the direction adjustment main gear shaft, the direction adjustment main gear shaft being dynamically connected to a direction adjustment motor fixedly installed in the direction adjustment box, a direction adjustment main gear shaft being fixedly connected to the outer surface of the direction adjustment main gear shaft, the direction adjustment main gear being meshed with the direction adjustment sub-gear, the direction adjustment sub-gear being fixedly installed on the outer surface of the direction adjustment sub-gear shaft, the direction adjustment sub-gear shaft being rotatably installed between the end walls of the direction adjustment gear shaft, the direction adjustment sub-gear shaft extending to the lower portion of the direction adjustment box, the end of the direction adjustment sub-gear shaft being fixedly connected to the installation box, a stabilizing ring being connected between the installation box and the direction adjustment box.

[0008] Preferably, the mine pressure monitoring mechanism includes a monitoring chute symmetrically arranged in the installation box, a monitoring screw rod is rotatably connected between the end walls of the monitoring chute, the monitoring screw rod is connected to the monitoring motor power fixedly installed in the installation box, a monitoring nut block is threadedly connected to the outer surface of the monitoring screw rod, the monitoring nut block is slidably connected between the end walls of the monitoring chute, a mounting frame is fixedly connected between the monitoring nut blocks, a plurality of adjusting slots are provided on the mounting frame, a monitoring shaft is symmetrically rotatably connected between the end walls of the adjusting slot, an adjusting frame is fixedly connected between the monitoring shafts, and the adjusting frame has four An L-shaped frame is fixedly connected at the angular position, a clamping bolt is threaded on the L-shaped frame, a flexible dual-modal sensor is detachably clamped and connected to the adjustment frame through the clamping bolt, a pulley cavity is symmetrically provided in the mounting frame, the monitoring shafts on both sides extend into the pulley cavity, a pulley is fixedly connected to the outer surface of the monitoring shaft in the pulley cavity, the pulleys in the vertical direction are connected and driven by belts, so that the two flexible dual-modal sensors in the vertical direction can be adjusted in the same direction, and one of the monitoring shafts is connected to the motor power fixedly installed in the mounting frame.

[0009] Preferably, the closing mechanism includes a bevel gear cavity provided in the mounting frame, wherein the lower end of one of the monitoring screw rods extends into the bevel gear cavity, the lower end of the monitoring screw rod is fixedly connected to a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is fixedly mounted on an outer surface of a bevel gear shaft, the bevel gear shaft is rotatably mounted between the end walls of the bevel gear cavity, the outer surface of the bevel gear shaft is symmetrically fixedly connected with a closed driving bevel gear, the closed driving bevel gear is meshed with a closed driven bevel gear, the closed driven bevel gear is fixedly mounted on the end of a closed rotating shaft, the closed rotating shaft is rotatably mounted on the end wall of the bevel gear cavity, and the closed rotating shaft extends into the mounting box, and a baffle is fixedly connected to the outer surface of the closed rotating shaft in the mounting box.

[0010] Preferably, the dust removal mechanism comprises a dust removal pump fixedly connected to the rear end wall of the installation box, a plurality of dust removal pipes are connected to the dust removal pump, and the ends of the dust removal pipes away from the dust removal pump are connected to the installation box.

[0011] Preferably, the flexible bimodal sensor includes an electrode layer made by a laser induced graphene method, a sensitive layer with a porous microstructure composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film, an outer packaging layer composed of a flexible polyimide (PI) film, wires, etc., wherein the wires are connected to the electrode layers to which they belong, the sensitive layer is sandwiched between the electrode layers, and the packaging layer covers the electrode layers.

[0012] Preferably, the material used for the electrode layer is graphene;

[0013] The sensitive layer is composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film with a porous microstructure;

[0014] The encapsulation layer is made of polyimide;

[0015] The conductor is made of a copper wire with an insulating layer, and the conductor is welded on the electrode layer by tin wire;

[0016] The electrode layer is carbonized on a polyimide (PI) film according to a preset shape by a laser engraving machine.

[0017] Preferably, the sensitive layer is prepared by dissolving polyurethane (TPU) in dimethylformamide (DMF) at a mass ratio of 1:5; then, adding 5% by mass of carbon black (CB) and 3% by mass of carbon nanotubes (CNTs) to the mixed solution, and stirring the mixed solution on a stirring heating table until it is completely dissolved; after dissolving, adding salt (NaCl) particles to the mixed solution, stirring and mixing, and then placing the solution in an ultrasonic machine for curing by a water bath method; after the NaCl particles are completely dissolved, a polyurethane (TPU) and carbon black (CB) / carbon nanotube (CNTs) film with a porous microstructure can be obtained.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention provides a flexible dual-mode sensor mounting bracket for mine pressure monitoring, which can realize the installation of the flexible dual-mode sensor and the adjustment of the angle direction and height of the flexible dual-mode sensor, thereby expanding the monitoring range and making the fixed installation more reliable.

[0020] 2. The present invention provides a flexible dual-modal sensor for mine pressure monitoring. The electrode materials used in most flexible sensors are metals, and most organic solvents cannot adhere to metals. There may be problems such as loose electrode adhesion or electrode stratification and detachment after repeated bending, which causes inconvenience to industrial production and daily life. The laser-induced graphene method can be used to engrave any desired electrode shape on the surface of the organic polymer film, which not only ensures that the electrode layer and the sensitive layer fit closely, but also can be customized in shape according to the applicable occasion.

[0021] 3. The present invention provides a flexible dual-modal sensor for mine pressure monitoring. A porous microstructure is introduced into the sensitive layer of the sensor. When the sensor is subjected to external pressure, the pores are closed first, which can enhance the sensor's detection sensitivity to tiny pressures.

[0022] 4. The present invention provides a flexible dual-mode sensor for mine pressure monitoring, which uses a sensitive layer with a porous microstructure composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film. The sensitive layer is non-conductive when not under pressure or under a small pressure, and presents a high resistance state to the outside. The sensor output signal is a capacitance. When subjected to a larger pressure, the carbon black and carbon nanotubes form a conductive network, and the sensitive layer presents a low resistance state to the outside. The sensor output signal changes to a resistance. This design not only enhances the sensor's detection range of pressure, but also allows the sensor to have multiple output modes and multiple functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0024] In the attached picture:

[0025] Figure 1 It is a schematic diagram of the structure in the first direction of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0026] Figure 2 It is a schematic diagram of the structure in the second direction of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0027] Figure 3 It is a third-direction structural schematic diagram of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0028] Figure 4 It is a schematic diagram of a first split structure of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0029] Figure 5 It is a schematic diagram of a second split structure of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0030] Figure 6 It is a schematic diagram of a third split structure of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0031] Figure 7 It is a schematic diagram of a fourth split structure of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0032] Figure 8 It is a schematic diagram of a fifth split structure of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure in the fourth direction of a flexible dual-mode sensor mounting frame for mine pressure monitoring in the present invention;

[0034] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure at AA in the middle;

[0035] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure at the middle BB;

[0036] Fig.12 Schematic diagram of the overall structure of the flexible dual-mode sensor in the present invention;

[0037] Fig.13 Schematic diagram of the manufacturing process of the flexible dual-mode sensor in the present invention;

[0038] Fig.14It is a working schematic diagram of the flexible dual-modal sensor in the present invention.

[0039] In the figure: 1-fixed frame, 2-fixed rotating shaft, 3-fixed drill bit, 4-tightening cone, 5-spring, 6-tightening slide bar, 7-cage, 8-movable frame, 9-stabilizing plate, 10-direction adjustment box, 11-installation box, 13-moving screw rod, 14-moving slide trough, 15-dust removal pump, 16-dust removal pipe, 17-baffle, 20-fixed driven gear, 21-fixed driving gear shaft, 22-winch, 23-lifting rope, 24-lifting motor, 25-lifting driving gear shaft, 26-lifting driving gear, 27-lifting driven gear, 28-lifting rotating shaft, 29-fixed driving gear, 30-fixed motor, 31-threaded pipe, 32-threaded sleeve, 33-screw, 34-direction adjustment main gear, 35-direction adjustment main gear Axle, 36-direction adjustment sub-gear, 37-direction adjustment sub-gear shaft, 39-monitoring motor, 40-monitoring nut block, 41-monitoring screw, 42-closed rotating shaft, 43-mounting frame, 44-closed driven bevel gear, 45-closed driving bevel gear, 46-bevel gear shaft, 47-second bevel gear, 48-first bevel gear, 49-adjusting frame, 50-flexible dual-mode sensor, 52-L-shaped frame, 53-tightening bolt, 54-adjusting groove, 55-fixed gear cavity, 56-lifting gear cavity, 57-lifting cavity, 58-moving nut block, 59-direction adjustment gear shaft, 60-monitoring slide groove, 61-monitoring rotating shaft, 62-pulley cavity, 63-pulley, 64-belt, 65-bevel gear cavity, 66-threaded column. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] like Figure 1-14As shown, the present invention provides a flexible dual-modal sensor mounting bracket for mine pressure monitoring, including a fixing bracket 1, the fixing bracket 1 is connected with a mounting and fixing mechanism, the mounting and fixing mechanism is used to fix the fixing bracket 1 on the mine wall, the fixing bracket 1 is connected with a lifting mechanism, the lifting mechanism is used to drive the installation box 11 to lift and lower, so as to facilitate the monitoring of mine pressure, the installation box 11 is provided with a mine pressure monitoring mechanism, the mine pressure monitoring mechanism is used to install the flexible dual-modal sensor and monitor the mine pressure, the installation box 11 is provided with a closing mechanism, the closing mechanism is used to close the installation box 11, the installation box 11 is connected with a dust removal mechanism, the dust removal mechanism is used to remove dust from the surface of the flexible dual-modal sensor to prevent affecting the monitoring.

[0042] Advantageously, the mounting and fixing mechanism comprises a fixed gear cavity 55 symmetrically arranged in the fixed frame 1, a fixed driving gear shaft 21 is rotatably connected between the end walls of the fixed gear cavity 55, the fixed driving gear shaft 21 is connected to the power output shaft of the fixed motor 30, the fixed motor 30 is fixedly installed in the fixed frame 1, a fixed driving gear 29 is fixedly connected to the outer surface of the fixed driving gear shaft 21, the fixed driving gear 29 is meshed with the fixed driven gear 20, the fixed driven gear 20 is fixedly installed on the outer surface of the fixed rotating shaft 2, a fixed drill bit 3 is fixedly connected to the upper part of the fixed rotating shaft 2, the fixed rotating shaft 2 is rotatably installed on the upper end wall of the fixed gear cavity 55 through, The interior of the fixed shaft 2 is a hollow structure, a screw 33 is fixedly connected to the bottom wall of the fixed gear cavity 55, the outer surface of the screw 33 is threadedly connected to a threaded sleeve 32, the threaded sleeve 32 is slidably connected to the fixed shaft 2, the screw 33 is located inside the fixed shaft 2, the capstan 22 pushes the top tightening slide 6 to move, the top tightening slide 6 penetrates and is slidably connected to the fixed shaft 2, a plurality of top tightening slides 6 are provided, the inner end of the top tightening slide 6 is processed into a spherical shape, the outer end of the top tightening slide 6 is fixedly connected to a top tightening cone 4, a spring 5 is clamped between the top tightening cone 4 and the fixed shaft 2, the top tightening cone 4 is pressed against the fixed rock wall to prevent sliding;

[0043] During operation, the fixed motor 30 is started to drive the fixed driving gear shaft 21 to rotate, thereby driving the fixed driving gear 29 to rotate, and the fixed driving gear 29 is meshed with the fixed driven gear 20, thereby driving the fixed rotating shaft 2 to rotate, thereby driving the fixed drill bit 3 to rotate and drill into the top wall of the mine, and the fixed rotating shaft 2 rotates, thereby driving the threaded sleeve 32 to rotate, and the screw rod 33 is threadedly connected with the threaded sleeve 32, so that the threaded sleeve 32 rotates and slides upward. When it slides upward to contact the tightening slide bar 6, the tightening slide bar 6 is pushed to move, thereby pushing the tightening cone 4 to tighten against the rock wall, and the spring 5 is tightened to prevent sliding, increase the reliability of fixation, and play an anti-skid role. When resetting, the threaded sleeve 32 is reset, and the spring 5 resets to drive the tightening cone 4 to reset.

[0044] Advantageously, the lifting mechanism includes a lifting cavity 57 symmetrically arranged in the fixed frame 1, a lifting gear cavity 56 is arranged in the fixed frame 1, and the lifting gear cavity 56 is located between the lifting cavities 57. A lifting driving gear shaft 25 is rotatably connected between the end walls of the lifting gear cavity 56. The lifting driving gear shaft 25 is connected to the power output shaft of the lifting motor 24. The lifting motor 24 is fixedly installed in the fixed frame 1. The outer surface of the lifting driving gear shaft 25 is fixedly connected to the lifting driving gear 26. The lifting driving gear 26 is meshed with the lifting driven gear 27. The lifting driven gear 27 is fixedly installed on the outer surface of the lifting shaft 28. The lifting shaft 28 extends into the lifting cavity 57. The outer surface of the lifting shaft 28 in the lifting cavity 57 is fixedly connected to the winch 22. The outer surface of the winch 22 is wound with a lifting rope 23. The lifting rope The end of 23 is fixedly connected with a threaded column 66, and the threaded column 66 is threadedly connected with the threaded tube 31, and the threaded tube 31 is fixedly installed on the upper part of the bracket 7, and the bracket 7 is inserted into the slot provided at the lower part of the fixed bracket 1. In order to facilitate the bracket 7 to be inserted into the slot, the edge position of the slot is processed with a certain arc, and the lower part of the bracket 7 is fixedly connected with a moving bracket 8, and a moving slide groove 14 is provided on the bottom wall of the moving bracket 8, and a moving screw rod 13 is rotatably connected between the end walls of the moving slide groove 14, and the moving screw rod 13 is connected to the power output shaft of the moving motor fixedly installed in the moving bracket 8, and the outer surface of the moving screw rod 13 is threadedly connected with a moving nut block 58, and the moving nut block 58 is slidably connected between the end walls of the moving slide groove 14, and the lower part of the moving nut block 58 is connected with a direction adjustment mechanism, and the direction adjustment mechanism is used to adjust the direction of the installation box 11;

[0045] During operation, the lifting motor 24 is started, thereby driving the lifting driving gear shaft 25 to rotate, thereby driving the lifting driving gear 26 to rotate, and the lifting driving gear 26 is meshed with the lifting driven gear 27, thereby driving the lifting shaft 28 to rotate, thereby driving the winch 22 to rotate, thereby driving the lifting rope 23 to move, thereby driving the threaded tube 31 to move downward, thereby driving the bracket 7 to move downward, thereby driving the moving frame 8 to move downward, thereby driving the direction adjustment box 10 to move downward, thereby driving the installation box 11 to move downward, thereby adjusting the monitoring height and monitoring the mine pressure at different heights, starting the moving motor, thereby driving the moving screw rod 13 to rotate, thereby driving the moving nut block 58 to move, thereby driving the installation box 11 to move, thereby monitoring the mine pressure at different positions.

[0046] Advantageously, the direction adjustment mechanism includes a direction adjustment box 10 fixedly connected to the lower part of the moving nut block 58, a stabilizing plate 9 symmetrically fixedly connected to the upper part of the direction adjustment box 10, a slidable connection between the stabilizing plate 9 and the moving frame 8, a direction adjustment gear shaft 59 is arranged in the direction adjustment box 10, a direction adjustment main gear shaft 35 is rotatably connected between the end walls of the direction adjustment gear shaft 59, a direction adjustment main gear shaft 35 is rotatably connected between the end walls of the direction adjustment main gear shaft 35, and the direction adjustment main gear shaft 35 is connected to the power of the direction adjustment motor fixedly installed in the direction adjustment box 10. Then, the outer surface of the direction adjustment main gear shaft 35 is fixedly connected with the direction adjustment main gear 34, the direction adjustment main gear 34 is meshed with the direction adjustment sub-gear 36, the direction adjustment sub-gear 36 is fixedly installed on the outer surface of the direction adjustment sub-gear shaft 37, the direction adjustment sub-gear shaft 37 is rotatably installed between the end walls of the direction adjustment gear shaft 59, the direction adjustment sub-gear shaft 37 extends to the lower part of the direction adjustment box 10, the end of the direction adjustment sub-gear shaft 37 is fixedly connected with the installation box 11, and a stabilizing ring is connected between the installation box 11 and the direction adjustment box 10;

[0047] During operation, the direction adjustment motor is started to drive the direction adjustment main gear shaft 35 to rotate, thereby driving the direction adjustment main gear 34 to rotate, and the direction adjustment main gear 34 is engaged with the direction adjustment sub-gear 36, thereby driving the direction adjustment sub-gear shaft 37 to rotate, thereby driving the installation box 11 to rotate, the stabilizing ring increases the stability of the rotation of the installation box 11, the stabilizing plate 9 increases the stability of the direction adjustment box 10 when moving, and the installation box 11 rotates, thereby increasing the monitoring range.

[0048] Advantageously, the mine pressure monitoring mechanism includes a monitoring chute 60 symmetrically arranged in the installation box 11, a monitoring screw rod 41 is rotatably connected between the end walls of the monitoring chute 60, the monitoring screw rod 41 is connected to the monitoring motor 39 fixedly installed in the installation box 11, the outer surface of the monitoring screw rod 41 is threadedly connected with a monitoring nut block 40, the monitoring nut block 40 is slidably connected between the end walls of the monitoring chute 60, a mounting frame 43 is fixedly connected between the monitoring nut blocks 40, a plurality of adjustment slots 54 are provided on the mounting frame 43, a monitoring shaft 61 is symmetrically rotatably connected between the end walls of the adjustment slot 54, an adjustment frame 49 is fixedly connected between the monitoring shafts 61, and the adjustment frame 4 The four corners are fixedly connected with an L-shaped frame 52, and the L-shaped frame 52 is threadedly connected with a clamping bolt 53. The adjusting frame 49 is detachably clamped and connected with a flexible dual-mode sensor 50 through the clamping bolt 53. The mounting frame 43 is symmetrically provided with a pulley cavity 62, and the monitoring shafts 61 on both sides extend into the pulley cavity 62. The outer surface of the monitoring shaft 61 in the pulley cavity 62 is fixedly connected with a pulley 63. The pulleys 63 in the vertical direction are connected and driven by a belt 64, so that the two flexible dual-mode sensors 50 in the vertical direction can be adjusted in the same direction, and one of the monitoring shafts 61 is connected to the motor power fixedly installed in the mounting frame 43;

[0049] During operation, the monitoring motor 39 is started to drive the monitoring screw rod 41 to rotate, thereby driving the monitoring nut block 40 to move downward, thereby driving the mounting frame 43 to move downward, thereby driving the flexible dual-modal sensor 50 to move downward out of the mounting box 11. After moving out of the mounting box 11, the motor is started to drive the monitoring shaft 61 to rotate, thereby driving the pulley 63 to rotate. The pulleys 63 are connected and transmitted by the belt 64, thereby driving the monitoring shaft 61 to rotate, thereby driving the adjustment frame 49 to rotate, thereby driving the flexible dual-modal sensor 50 to rotate, thereby realizing synchronous adjustment of the two flexible dual-modal sensors 50 in the vertical direction, so that the two flexible dual-modal sensors 50 in the vertical direction on one side are in the vertical direction, and the two flexible dual-modal sensors 50 in the vertical direction on the other side are in the horizontal direction, thereby realizing monitoring of mine pressure in different directions.

[0050] Advantageously, the closing mechanism comprises a bevel gear cavity 65 provided in the mounting frame 43, wherein the lower end of one of the monitoring screw rods 41 extends into the bevel gear cavity 65, the lower end of the monitoring screw rod 41 is fixedly connected to a first bevel gear 48, the first bevel gear 48 meshes with a second bevel gear 47, the second bevel gear 47 is fixedly mounted on the outer surface of a bevel gear shaft 46, the bevel gear shaft 46 is rotatably mounted between the end walls of the bevel gear cavity 65, the outer surface of the bevel gear shaft 46 is symmetrically fixedly connected to a closed active bevel gear 45, the closed active bevel gear 45 meshes with a closed driven bevel gear 44, the closed driven bevel gear 44 is fixedly mounted on the end of a closed rotating shaft 42, the closed rotating shaft 42 is rotatably mounted on the end wall of the bevel gear cavity 65, and the closed rotating shaft 42 extends into the mounting box 11, the outer surface of the closed rotating shaft 42 in the mounting box 11 is fixedly connected to a baffle 17;

[0051] During operation, the monitoring screw 41 rotates, thereby driving the first bevel gear 48 to rotate, and the first bevel gear 48 meshes with the second bevel gear 47, thereby driving the bevel gear shaft 46 to rotate, thereby driving the closed active bevel gear 45 to rotate, and the closed active bevel gear 45 meshes with the closed driven bevel gear 44, thereby driving the closed rotating shaft 42 to rotate, thereby driving the baffle 17 to rotate, thereby driving the installation box 11 to open.

[0052] Advantageously, the dust removal mechanism comprises a dust removal pump 15 fixedly connected to the rear end wall of the installation box 11, and the dust removal pump 15 is connected to a plurality of dust removal pipes 16, and the ends of the dust removal pipes 16 away from the dust removal pump 15 are connected to the installation box 11;

[0053] During operation, the mounting bracket 43 is retracted into the fixing bracket 1, and the dust removal pump 15 is started to evacuate and dust the mounting box 11, so that the dust and gas in the mounting box 11 enter the dust removal pump 15 through the dust removal pipe 16 for discharge, thereby achieving dust removal and preventing a large amount of dust from accumulating on the surface of the flexible dual-modal sensor 50 and affecting monitoring.

[0054] Advantageously, the flexible dual-modal sensor 50 includes an electrode layer made by a laser-induced graphene method, a sensitive layer with a porous microstructure composed of a polyurethane (TPU) and carbon black (CB) / carbon nanotube (CNTs) mixed film, an outer packaging layer composed of a flexible polyimide (PI) film, wires, etc., wherein the wires are connected to the electrode layers to which they belong, the sensitive layer is sandwiched between the electrode layers, and the packaging layer covers the electrode layers.

[0055] Advantageously, the material used for the electrode layer is graphene;

[0056] The sensitive layer is composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film with a porous microstructure;

[0057] The encapsulation layer is made of polyimide;

[0058] The conductor is made of a copper wire with an insulating layer, and the conductor is welded on the electrode layer by tin wire;

[0059] The electrode layer is carbonized on a polyimide (PI) film according to a preset shape by a laser engraving machine.

[0060] Advantageously, the sensitive layer is prepared by dissolving polyurethane (TPU) in dimethylformamide (DMF) at a mass ratio of 1:5; then adding 5% by mass of carbon black (CB) and 3% by mass of carbon nanotubes (CNTs) to the mixed solution, and stirring the mixed solution on a stirring heating table until it is completely dissolved; after the solution is dissolved, adding salt (NaCl) particles to the mixed solution, stirring and mixing, and then placing the solution in an ultrasonic machine for curing by a water bath method; after the NaCl particles are completely dissolved, a polyurethane (TPU) and carbon black (CB) / carbon nanotube (CNTs) film with a porous microstructure can be obtained;

[0061] When working: The sensitive layer with a porous microstructure composed of TPU and CB / CNTs mixed film presents a high resistance state under small pressure, and the sensor outputs a capacitance signal. When the pressure gradually increases, the air between the pores is discharged, the relative dielectric constant of the sensitive layer gradually increases, the distance between the electrode layers decreases, and the capacitance signal increases. When the pressure is large, as the sensitive layer is further compressed, due to the tunnel effect, a conductive path begins to form, and it presents a low resistance state. The sensor outputs a resistance signal, which improves the sensor's detection sensitivity for small pressures and also enhances the sensor's pressure detection range.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible dual-mode sensor mounting frame for mine pressure monitoring, characterized in that: The invention comprises a fixing frame (1), the fixing frame (1) being connected to a mounting fixing mechanism, the mounting fixing mechanism being used to fix the fixing frame (1) on a mine wall, the fixing frame (1) being connected to a lifting mechanism, the lifting mechanism being used to drive a mounting box (11) to lift and lower, so as to facilitate monitoring of mine pressure, the mounting box (11) being provided with a mine pressure monitoring mechanism, the mine pressure monitoring mechanism being used to mount a flexible dual-mode sensor and monitor mine pressure, the mounting box (11) being provided with a closing mechanism, the closing mechanism being used to close the mounting box (11), the mounting box (11) being connected to a dust removal mechanism, the dust removal mechanism being used to remove dust from the surface of the flexible dual-mode sensor to prevent affecting monitoring.

2. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 1, characterized in that: The mounting and fixing mechanism comprises a fixed gear cavity (55) symmetrically arranged in the fixed frame (1); a fixed driving gear shaft (21) is rotatably connected between the end walls of the fixed gear cavity (55); the fixed driving gear shaft (21) is connected to the power output shaft of a fixed motor (30); the fixed motor (30) is fixedly installed in the fixed frame (1); a fixed driving gear (29) is fixedly connected to the outer surface of the fixed driving gear shaft (21); the fixed driving gear (29) is meshed with a fixed driven gear (20); the fixed driven gear (20) is fixedly installed on the outer surface of a fixed rotating shaft (2); a fixed drill bit (3) is fixedly connected to the upper part of the fixed rotating shaft (2); the fixed rotating shaft (2) penetrates and is rotatably installed on the upper end wall of the fixed gear cavity (55); the fixed rotating shaft (2) is fixedly connected to the fixed driven gear (29) and is meshed with the fixed driven gear (20); the fixed driven gear (20) is fixedly installed on the outer surface of a fixed rotating shaft (2); The interior of the shaft (2) is a hollow structure. A screw (33) is fixedly connected to the bottom wall of the fixed gear cavity (55). The outer surface of the screw (33) is threadedly connected to a threaded sleeve (32). The threaded sleeve (32) is slidably connected to the fixed rotating shaft (2). The screw (33) is located inside the fixed rotating shaft (2). The capstan (22) pushes the tightening slide bar (6) to move. The tightening slide bar (6) penetrates and is slidably connected to the fixed rotating shaft (2). A plurality of tightening slide bars (6) are provided. The inner end of the tightening slide bar (6) is processed into a spherical shape. The outer end of the tightening slide bar (6) is fixedly connected to a tightening cone (4). A spring (5) is clamped between the tightening cone (4) and the fixed rotating shaft (2). The tightening cone (4) is tightened on the fixed rock wall to prevent sliding.

3. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 2, characterized in that: The lifting mechanism comprises a lifting cavity (57) symmetrically arranged in the fixed frame (1), a lifting gear cavity (56) is arranged in the fixed frame (1), the lifting gear cavity (56) is located between the lifting cavities (57), a lifting driving gear shaft (25) is rotatably connected between the end walls of the lifting gear cavity (56), the lifting driving gear shaft (25) is connected to the power output shaft of the lifting motor (24), the lifting motor (24) is fixedly installed in the fixed frame (1), the outer surface of the lifting driving gear shaft (25) is fixedly connected to the lifting driving gear (26), the lifting driving gear (26) is meshed with the lifting driven gear (27), the lifting driven gear (27) is fixedly installed on the outer surface of the lifting shaft (28), the lifting shaft (28) extends into the lifting cavity (57), the outer surface of the lifting shaft (28) in the lifting cavity (57) is fixedly connected to the winch (22), the outer surface of the winch (22) is wound around A lifting rope (23) is connected around the lifting rope (23), and the end of the lifting rope (23) is fixedly connected with a threaded column (66), and the threaded column (66) is threadedly connected to the threaded tube (31), and the threaded tube (31) is fixedly installed on the upper part of the bracket (7), and the bracket (7) is inserted into a slot provided at the lower part of the fixed bracket (1); the lower part of the bracket (7) is fixedly connected with a moving bracket (8), and a moving slide groove (14) is provided on the bottom wall of the moving bracket (8), and a moving screw rod (13) is rotatably connected between the end walls of the moving slide groove (14), and the moving screw rod (13) is connected to the power output shaft of the moving motor fixedly installed in the moving bracket (8); the outer surface of the moving screw rod (13) is threadedly connected with a moving nut block (58), and the moving nut block (58) is slidably connected between the end walls of the moving slide groove (14), and the lower part of the moving nut block (58) is connected with a direction adjustment mechanism, and the direction adjustment mechanism is used to adjust the direction of the installation box (11).

4. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 3 is characterized in that: The direction adjustment mechanism comprises a direction adjustment box (10) fixedly connected to the lower part of the moving nut block (58); a stabilizing plate (9) is symmetrically fixedly connected to the upper part of the direction adjustment box (10); the stabilizing plate (9) is slidably connected to the moving frame (8); a direction adjustment gear shaft (59) is arranged in the direction adjustment box (10); a direction adjustment main gear shaft (35) is rotatably connected between the end walls of the direction adjustment gear shaft (59); a direction adjustment main gear shaft (35) is rotatably connected between the end walls of the direction adjustment main gear shaft (35); the direction adjustment main gear shaft (35) is dynamically connected to a direction adjustment motor fixedly installed in the direction adjustment box (10); The outer surface of the direction adjustment main gear shaft (35) is fixedly connected with a direction adjustment main gear (34), the direction adjustment main gear (34) is meshed with a direction adjustment sub-gear (36), the direction adjustment sub-gear (36) is fixedly mounted on the outer surface of the direction adjustment sub-gear shaft (37), the direction adjustment sub-gear shaft (37) is rotatably mounted between the end walls of the direction adjustment gear shaft (59), the direction adjustment sub-gear shaft (37) extends to the lower part of the direction adjustment box (10), the end of the direction adjustment sub-gear shaft (37) is fixedly connected with the installation box (11), and a stabilizing ring is connected between the installation box (11) and the direction adjustment box (10).

5. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 4, characterized in that: The mine pressure monitoring mechanism comprises a monitoring chute (60) symmetrically arranged in the installation box (11), a monitoring screw rod (41) is rotatably connected between the end walls of the monitoring chute (60), the monitoring screw rod (41) is connected to a monitoring motor (39) fixedly installed in the installation box (11), a monitoring nut block (40) is threadedly connected to the outer surface of the monitoring screw rod (41), the monitoring nut block (40) is slidably connected between the end walls of the monitoring chute (60), a mounting frame (43) is fixedly connected between the monitoring nut blocks (40), a plurality of adjustment slots (54) are arranged on the mounting frame (43), a monitoring shaft (61) is symmetrically rotatably connected between the end walls of the adjustment slot (54), an adjustment frame (49) is fixedly connected between the monitoring shafts (61), and the adjustment frame (49) ) are fixedly connected to the four corners with L-shaped frames (52), the L-shaped frames (52) are threadedly connected with clamping bolts (53), the adjustment frame (49) is detachably clamped with a flexible dual-mode sensor (50) through the clamping bolts (53), the mounting frame (43) is symmetrically provided with pulley cavities (62), the monitoring shafts (61) on both sides extend into the pulley cavities (62), the outer surface of the monitoring shaft (61) in the pulley cavity (62) is fixedly connected with a pulley (63), the pulleys (63) in the vertical direction are connected and driven by belts (64), so that the two flexible dual-mode sensors (50) in the vertical direction can be adjusted in the same direction, and one of the monitoring shafts (61) is connected to the power of a motor fixedly installed in the mounting frame (43).

6. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 5, characterized in that: The sealing mechanism comprises a bevel gear cavity (65) provided in the mounting frame (43), wherein the lower end of one of the monitoring screw rods (41) extends into the bevel gear cavity (65), and the lower end of the monitoring screw rod (41) is fixedly connected with a first bevel gear (48), the first bevel gear (48) is meshed with a second bevel gear (47), and the second bevel gear (47) is fixedly mounted on the outer surface of a bevel gear shaft (46), and the bevel gear shaft (46) is rotatably mounted between the end walls of the bevel gear cavity (65), and the bevel gear shaft (46) is rotatably mounted between the end walls of the bevel gear cavity (65), and the bevel gear (48) is meshed with the second bevel gear (47). A closed active bevel gear (45) is symmetrically fixedly connected to the outer surface of the gear shaft (46), the closed active bevel gear (45) meshes with a closed driven bevel gear (44), the closed driven bevel gear (44) is fixedly mounted on the end of a closed rotating shaft (42), the closed rotating shaft (42) is rotatably mounted on the end wall of the bevel gear cavity (65), and the closed rotating shaft (42) extends into the installation box (11), and a baffle (17) is fixedly connected to the outer surface of the closed rotating shaft (42) in the installation box (11).

7. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 6, characterized in that: The dust removal mechanism comprises a dust removal pump (15) fixedly connected to the rear end wall of the installation box (11); a plurality of dust removal pipes (16) are connected to the dust removal pump (15); and the ends of the dust removal pipes (16) away from the dust removal pump (15) are connected to the installation box (11).

8. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 7, characterized in that: The flexible dual-mode sensor (50) comprises an electrode layer made by a laser-induced graphene method, a sensitive layer having a porous microstructure composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film, an outer packaging layer composed of a flexible polyimide (PI) film, a wire, etc., wherein the wire is connected to the electrode layer, the sensitive layer is sandwiched between the electrode layers, and the packaging layer covers the electrode layers.

9. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 8, characterized in that: The material used for the electrode layer is graphene; The sensitive layer is composed of a polyurethane (TPU) and a carbon black (CB) / carbon nanotube (CNTs) mixed film with a porous microstructure; The encapsulation layer is made of polyimide; The conductor is made of a copper wire with an insulating layer, and the conductor is welded on the electrode layer by tin wire; The electrode layer is carbonized on a polyimide (PI) film according to a preset shape by a laser engraving machine.

10. The flexible dual-mode sensor mounting bracket for mine pressure monitoring according to claim 9, characterized in that: The sensitive layer is prepared by dissolving polyurethane (TPU) in dimethylformamide (DMF) at a mass ratio of 1:5; then adding 5% by mass of carbon black (CB) and 3% by mass of carbon nanotubes (CNTs) into the mixed solution, and placing the mixed solution on a stirring heating table and stirring until it is completely dissolved; After the solution is dissolved, salt (NaCl) particles are added to the mixed solution, and after stirring and mixing, the solution is placed in an ultrasonic machine and cured by a water bath method. After the NaCl particles are completely dissolved, a polyurethane (TPU) and carbon black (CB) / carbon nanotube (CNTs) film with a porous microstructure can be obtained.

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