Bed load collecting device

Abstract

The utility model discloses a bed load collecting device, which relates to the technical field of sediment testing and comprises a water tank, a gripping device mounting area is arranged on the side wall of the water tank, a gripping device and a visual identification mechanism are arranged on the gripping device mounting area, and the visual identification mechanism comprises a fixed light supplementing camera and a laser profile measuring head. The grabbing range of the grabbing device is located in the shooting range of the fixed light supplementing camera and the measuring range of the laser profile measuring head, and the volume, the approximate orientation and the approximate shape of the bed load can be calculated through a volumetric method according to images, shot by the fixed light supplementing camera, of the bed load. Then, the outline of the bed load is measured through the laser outline measuring head, so that the overall outline size and the accurate form of the bed load are obtained, accurate grabbing information is provided for the grabbing device, the grabbing precision is improved, and the defect that the size of the bed load is difficult to clearly know through a camera device in a sediment-carrying basin is overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to silt test technical field especially relates to a bed load collection device. BACKGROUND

[0002] Bed load is the sediment particle that moves on the riverbed surface or nearby in the way of sliding, rolling, jumping or layer moving, and its movement track is coupled by multiple factors such as water flow shear force, particle morphology and bed surface roughness, and its movement characteristics have important influence on river evolution, reservoir siltation and the like.

[0003] The current bed load collection device mainly relies on volume method sampling, that is, the volume of the bed load to be grabbed is calculated through a camera and a neural network algorithm, but when the water flow intensity exceeds the critical threshold, the pebble particles are separated from the static state and enter intermittent movement, and this non-continuous transport characteristic causes the traditional volume method sampling to have a significant boundary layer capture blind area. The sampling precision deviation will directly cause the bed load flux calculation error to be enlarged, for example, in the mountainous river channel with a slope greater than 3%, 10% of the pebble missing sampling can cause the annual erosion and siltation estimation deviation to be more than 25%. Therefore, a bed load collection device capable of accurate collection is urgently needed. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of bed load collection devices, and the outline measurement of fixed light-supplement camera and laser profile measurement head to bed load according to the image shot by the camera can provide accurate grabbing information for grabbing device, improve the grabbing precision, make up the deficiency that camera device is difficult to know the size of bed load clearly in many sand basins.

[0005] To achieve the above object, the utility model provides the following scheme: the utility model discloses a kind of bed load collection devices, including water tank, the lateral wall of the water tank is equipped with grabbing device installation area, grabbing device and visual identification mechanism are equipped on the grabbing device installation area, the visual identification mechanism includes fixed light-supplement camera and laser profile measurement head, the grabbing range of the grabbing device is located in the camera range of the fixed light-supplement camera and the measurement range of the laser profile measurement head.

[0006] Preferably, speedometer is further equipped on the grabbing device installation area.

[0007] Preferably, the grabbing device includes grabbing hand, and the grabbing hand includes grabbing bottom plate and octopus bionic tentacle arranged on the grabbing bottom plate.

[0008] Preferably, a plurality of said octopus bionic tentacles are arranged on the circumference of the grabbing base plate, and the laser profile measurement head is installed on the grabbing base plate and located between the plurality of said octopus bionic tentacles.

[0009] Preferably, the grabbing device further comprises a connecting column, a telescopic rod and a movable joint, the connecting column is arranged on the grabbing device mounting area, the fixed end of the telescopic rod is connected with the connecting column, and the movable end of the telescopic rod is connected with the grabbing base plate through the movable joint.

[0010] Preferably, the side wall of the water tank is further provided with a power device mounting area located on the opposite side of the grabbing device mounting area, and a power device is installed in the power device mounting area, wherein the power device comprises a propeller and a swingable tail wing.

[0011] Preferably, the water tank is cylindrical, and the water tank is provided with a floating chamber and a gas storage chamber, a drainage plate is slidably connected in the floating chamber, the drainage plate divides the floating chamber into an upper air inlet chamber and a lower water inlet chamber, the gas storage chamber and the floating chamber are communicated through an air inlet and an air outlet, the air inlet is provided with a gas compression pump, the air outlet is provided with an air outlet valve, and the bottom wall of the water tank is provided with a water passage valve communicated with the water inlet chamber.

[0012] Preferably, the side wall of the water tank is further provided with a monitoring device mounting area located between the grabbing device mounting area and the power device mounting area, and a monitoring device is installed in the monitoring device mounting area, wherein the monitoring device comprises a camera guide rail and a mobile light supplement camera capable of moving along the camera guide rail, and the camera guide rail extends along the circumference of the side wall of the water tank.

[0013] Preferably, the side wall of the water tank is further provided with a protection device mounting area separately arranged on the upper and lower sides of the monitoring device mounting area, and a protection device is installed in the protection device mounting area, wherein the protection device comprises a protection shell, and the protection shell extends outwardly and beyond the monitoring device.

[0014] Preferably, the protection device mounting areas are arranged at a circumferential interval along the side wall of the water tank, one mounting base is arranged in each protection device mounting area, an installation slot hole is arranged on the mounting base, the axis of the installation slot hole is perpendicular to the central axis of the water tank, the protection device further comprises a pressure sensor and a connecting rod, the pressure sensor is fixedly installed on the slot bottom of the installation slot hole, the measuring head of the pressure sensor is coaxially arranged with the installation slot hole, the connecting rod is slidably connected in the installation slot hole, one end of the connecting rod is fixedly connected with the measuring head of the pressure sensor in a coaxial manner, and the other end of the connecting rod is fixedly connected with the protection shell.

[0015] The utility model discloses relative to prior art has obtained following technical effect:

[0016] In the utility model, according to the image of the moving mass that fixed light filling camera shoots, can utilize volume method to calculate the moving mass volume, approximate direction and approximate form, then through laser profile measuring head, the profile of moving mass is measured, so as to obtain the whole profile size and accurate form of moving mass, provides accurate capture information for the capture device, improves the capture precision, makes up the deficiency that the camera device is difficult to know the size of moving mass clearly in the multi-sand basin 。 BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0018] Figure 1 It is the front view three-dimensional structure schematic diagram of the moving mass collection device in the embodiment of the utility model;

[0019] Figure 2 It is the rear view three-dimensional structure schematic diagram of the moving mass collection device in the embodiment of the utility model;

[0020] Figure 3 It is the structure detail schematic diagram of the propeller and tail wing in the embodiment of the utility model;

[0021] Figure 4 It is the detail schematic diagram of water tank, protection device and monitoring device in the embodiment of the utility model;

[0022] Figure 5 It is the structure schematic diagram of the capture device in the embodiment of the utility model.

[0023] Explanation of the drawings:

[0024] 101, propeller shell;102, propeller blade;103, tail wing;

[0025] 201, water tank;202, protection shell;203, connecting rod;204, first fixed light filling camera;211, mounting base;212, connecting column;213, water valve;214, second fixed light filling camera;215, camera guide rail;216, first mobile light filling camera;217, second mobile light filling camera;218, speedometer;

[0026] 301, telescopic rod; 302, universal ball hinge; 303, tentacle unit; 304, grabbing bottom plate; 311, remote control rope; 312, laser profile measurement head; 313, elastic gasket. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0028] The utility model discloses a kind of pushed material collection devices, to solve the problems existing in prior art, according to the image of pushed material that fixed light compensation camera shoots, pushed material volume can be calculated using volumetric method, then the profile of pushed material is measured by laser profile measurement head, so that the overall profile size of pushed material is obtained, provide accurate grabbing information for grabbing device, improve the precision of grabbing, make up the deficiency that camera device is difficult to clearly know the size of pushed material in multi-sand basin.

[0029] To make the above-mentioned purposes, features and advantages of the utility model more apparent and easy to understand, the utility model will be further described in detail below with the drawings and specific embodiments.

[0030] As shown in Figures 1 to 5 The embodiment provides a pushed material collection device, which comprises a water tank 201, a grabbing device mounting area is arranged on the side wall of the water tank 201, and a grabbing device and a visual recognition mechanism are arranged on the grabbing device mounting area. The visual recognition mechanism comprises a fixed light compensation camera and a laser profile measurement head 312, and the grabbing range of the grabbing device is located within the camera range of the fixed light compensation camera and the measurement range of the laser profile measurement head 312. The side wall of the water tank 201 comprises a tank head and a tank side of the water tank 201, that is, the grabbing device mounting area can be arranged on the tank head or the left and right sides of the tank body. The water tank 201 is a diving water tank in a broad sense, and a common diving water tank on the market can be directly used, or the water tank setting scheme given in the specific embodiments of the embodiment can be used.

[0031] Working principle:

[0032] The water tank 201 is close to the bed load, and the fixed light filling camera can shoot the bed load 1. According to the image shot by the fixed light filling camera, the volume of the bed load is calculated by the volume method, and then the profile of the bed load 1 is measured by the laser profile measuring head 312, so that the overall profile size of the bed load is obtained, so as to provide accurate grabbing information for the grabbing device, improve the grabbing precision, and make up for the deficiency that the camera device is difficult to clearly know the size of the bed load in the multi-sand basin. In addition, the fixed light filling camera can also observe whether the grabbing device has a fault in the grabbing process.

[0033] In an embodiment, two fixed light filling cameras are included, which are a first fixed light filling camera 204 and a second fixed light filling camera 214, and the first fixed light filling camera 204 and the second fixed light filling camera 214 are located above and below the grabbing device respectively. The two fixed light filling cameras can better understand the environment in front of the device and the working condition of the device.

[0034] In an embodiment, a speed measuring instrument 218 is further arranged on the grabbing device installation area, which can monitor the flow speed or travel speed of the water near the water tank 201, and then combined with the capture information obtained by the fixed light filling camera and the laser profile measuring head 312, a comprehensive grabbing movement scheme can be given. The speed measuring instrument 218 adopts a Doppler speed measuring instrument.

[0035] In an embodiment, the grabbing device includes a grabbing hand, and the grabbing hand includes a grabbing bottom plate 304 and an octopus bionic tentacle. The number of octopus bionic tentacles is set according to the need, and at least one is set. The octopus bionic tentacle is arranged on the grabbing bottom plate 304, and the octopus bionic tentacle is a prior art, which will not be described in detail here. The flexible grabbing mode of the octopus bionic tentacle can automatically adapt to the profile shape of the bed load, thereby further improving the grabbing precision.

[0036] In an embodiment, a plurality of octopus bionic tentacles are arranged on the grabbing bottom plate 304, and the plurality of octopus bionic tentacles are arranged circumferentially along the grabbing bottom plate 304, such as three octopus bionic tentacles. The laser profile measuring head 312 is installed on the grabbing bottom plate 304, and the laser profile measuring head 312 is located between the plurality of octopus bionic tentacles, and is preferably arranged at the center position of the grabbing bottom plate 304, so as to understand the size and shape of the grabbed bed load, and to compensate for the disadvantages of the image detection device in the multi-sand environment through the monitoring of the laser profile measuring head 312.

[0037] Before the plurality of octopus bionic tentacles are rolled up, a gap for monitoring by the laser profile measuring head 312 can be left between the plurality of octopus bionic tentacles. The plurality of octopus bionic tentacles can flexibly grab bed loads of different shapes.

[0038] In an embodiment, the octopus bionic tentacle mainly comprises a plurality of tentacle units 303, which are connected in series by two remote control ropes 311. The tentacle unit 303 is roughly hexagonal columnar, one of the angles of which is small, and the angle on the opposite side is large. The angle of the small angle corresponds to the large angle of the previous tentacle unit 303. In this way, the two tentacle units 303 adjacent to each other have a swing space. By winding one side of the remote control rope 311 and releasing the other side of the remote control rope 311, the tentacle unit 303 can be driven to swing to one side, so that the whole octopus bionic tentacle is wound up, thereby winding the transported matter. The winding motor is installed in the grabbing bottom plate 304. The winding motor is provided with a winding wheel, and the winding wheel is provided with two winding grooves. The two remote control ropes 311 are wound in opposite directions in the two winding grooves. When the winding motor drives the winding wheel to rotate forward or reversely, one side of the remote control rope 311 will be wound, and the other side of the remote control rope 311 will be released.

[0039] In an embodiment, the grabbing surface of the tentacle unit 303 is inlaid with an elastic gasket 313. The elastic gasket 313 can increase the friction force to ensure firm grabbing of the transported matter, and can also protect the grabbed transported matter, effectively avoiding damage to the transported matter sample during the grabbing process, ensuring the integrity of the grabbed transported matter, and being beneficial to subsequent research.

[0040] In an embodiment, the grabbing device further comprises a connecting column 212, an extension rod 301 and a movable joint. One end of the connecting column 212 is fixedly installed on the grabbing device installation area. The fixed end of the extension rod 301 is coaxially fixedly connected with the other end of the connecting column 212. The movable end of the extension rod 301 is connected with the grabbing bottom plate 304 through the movable joint. By lengthening and shortening the movable end of the extension rod 301, the grabbing bottom plate 304 can be pushed to approach and move away from the transported matter, the distance between the octopus bionic tentacle and the transported matter is adjusted, and the range that can be reached by the octopus bionic tentacle is increased, which is beneficial to the grabbing of the transported matter in complex terrain.

[0041] In an embodiment, the movable joint comprises a universal ball hinge 302 and a telescopic cylinder. The movable end of the telescopic cylinder is connected with the grabbing bottom plate 304 through the universal ball hinge 302. The telescopic cylinder is arranged around the universal ball hinge 302, and there are at least four telescopic cylinders. The cylinder body of the telescopic cylinder is fixedly connected with the grabbing device installation area, and the piston rod of the telescopic cylinder is fixedly connected with the grabbing bottom plate 304. By lengthening and shortening the piston rod of each telescopic cylinder, the orientation of the grabbing bottom plate 304 can be adjusted. The telescopic cylinder can be an electric telescopic cylinder, a pneumatic telescopic cylinder or a hydraulic telescopic cylinder.

[0042] In an embodiment, the universal ball hinge 302 comprises a ball seat and a ball head, the ball seat is fixedly connected with the telescopic rod 301, and the ball head is detachably connected with the grabbing bottom plate 304, so that the grabbing hand can be removed for maintenance and replacement when a problem occurs in the grabbing hand. Specifically, the ball head and the grabbing bottom plate 304 can be detachably connected by thread connection, buckle connection, etc.

[0043] In an embodiment, the side wall of the water tank 201 is further provided with a power device mounting area opposite to the grabbing device mounting area, and a power device is mounted in the power device mounting area. The power device comprises a propeller and a swingable tail fin 103. The propeller provides power for the water tank 201 to move forward, and the tail fin 103 adjusts the moving direction of the water tank 201.

[0044] In an embodiment, the propeller comprises a propeller shell 101 and propeller blades 102. The propeller shell 101 is fixedly installed on the power device mounting area, and the propeller blades 102 are rotatably connected in the propeller shell 101. A driving motor is arranged in the water tank 201 to drive the propeller blades 102 to rotate through a transmission shaft. The propeller shell 101 can effectively prevent the propeller blades 102 from being damaged, increase the service life of the propeller blades 102, and prevent the propeller blades 102 from cutting surrounding animals and plants.

[0045] In an embodiment, the water tank 201 is in a cylindrical shape, and the water tank 201 is provided with a floating chamber and a gas storage chamber. A drainage plate is slidably connected in the floating chamber, and the drainage plate divides the floating chamber into an upper air inlet chamber and a lower water inlet chamber. The gas storage chamber and the floating chamber are communicated through an air inlet and an air outlet. The air inlet is provided with a gas compression pump, and the air outlet is provided with an air exhaust valve. A water inlet valve 213 communicating with the water inlet chamber is arranged on the bottom wall of the water tank 201. When sinking is needed, the air exhaust valve and the water inlet valve 213 are opened, water enters the water inlet chamber through the water inlet valve 213, pushes up the drainage plate, the drainage plate presses the air inlet chamber, the gas in the air inlet chamber is discharged into the gas storage chamber through the air outlet, the volume of the water inlet chamber increases, and more water enters, so that the water tank 201 sinks to a preset depth, and then the water inlet valve 213 and the air exhaust valve are closed. When floating is needed, the air exhaust valve and the water inlet valve 213 are opened, and the gas compression pump is started to pump the gas stored in the gas storage chamber into the air inlet chamber. Under the pressure of the gas, the drainage plate is pushed down, the drainage plate presses the water inlet chamber, the water in the water inlet chamber is discharged through the water inlet valve 213, and the water tank 201 floats to a preset position, and then the water inlet valve 213, the air exhaust valve and the gas compression pump are closed.

[0046] In an embodiment, the side wall of the water tank 201 is further provided with a monitoring device installation area between the grabbing device installation area and the power device installation area. The monitoring device installation area is installed with a monitoring device, which includes a camera guide rail 215 and a mobile light supplement camera. The camera guide rail 215 extends along the circumference of the side wall of the water tank 201, and the mobile light supplement camera can move along the camera guide rail 215, so that the mobile light supplement camera can move along the circumference of the side wall of the water tank 201 to observe the surrounding environment as comprehensively as possible during operation, such as monitoring whether there are sediments or obstacles around the water tank 201 that need to be grabbed.

[0047] In an embodiment, the mobile light supplement camera is installed with a moving device, which includes a waterproof shell, a moving wheel and a moving motor. The mobile light supplement camera is installed on the waterproof shell, the moving wheel is rotatably connected to the waterproof shell, and the moving motor is arranged in the waterproof shell to drive the moving wheel to rotate. The moving wheel is movably connected to the camera guide rail 215. Specifically, the camera guide rail 215 includes two single rails made of channel steel. The mobile light supplement camera is located between the two single rails, and the waterproof shell is provided with two moving wheels on each side. Each moving wheel includes two single wheels clamped on the flange plates of the channel steel.

[0048] In an embodiment, the number of mobile light supplement cameras matches the number of camera guide rails 215. For example, two camera guide rails 215 are arranged on the two opposite side walls of the water tank 201. The two camera guide rails 215 are arc-shaped rails with an arc matching the side wall of the cylindrical water tank 201. Each of the two camera guide rails 215 is provided with a mobile light supplement camera, which is a first mobile light supplement camera 216 and a second mobile light supplement camera 217, respectively. The first mobile light supplement camera 216 and the second mobile light supplement camera 217 can reciprocate along the two camera guide rails 215 at regular intervals, and of course, the timing of the movement of the first mobile light supplement camera 216 and the second mobile light supplement camera 217 can be manually determined.

[0049] In an embodiment, the side wall of the water tank 201 is further provided with a protection device installation area arranged on the upper and lower sides of the monitoring device installation area. The protection device installation area is installed with a protection device, which includes a protection shell 202 extending outwardly and beyond the monitoring device. When the side wall of the water tank 201 collides with an external object, the protection shell 202 will contact the external object first, thereby protecting the water tank 201 and the monitoring device (the camera guide rail 215 and the mobile light supplement camera) from being damaged.

[0050] In an embodiment, the protection shell 202 is made of steel, preferably low-cost high-toughness ultra-high-strength steel, which can effectively resist the wear and impact of hard objects such as underwater gravel.

[0051] In an embodiment, the protection device installation area is arranged circumferentially along the side wall of the water tank 201, and each protection device installation area is provided with an installation base 211, and the installation base 211 is provided with an installation slot hole, and the axis of the installation slot hole is perpendicular to the central axis of the water tank 201. The protection device further comprises a pressure sensor and a connecting rod 203, and the installation base 211 is arranged on the protection device installation area. The pressure sensor is fixedly installed on the bottom of the installation slot hole, and the measuring head of the pressure sensor is coaxially arranged with the installation slot hole. The connecting rod 203 is slidably connected in the installation slot hole, one end of the connecting rod 203 is fixedly connected with the measuring head of the pressure sensor, and the other end of the connecting rod 203 is fixedly connected with the protection shell 202. Through the joint action of the pressure sensor, the connecting rod 203 and the protection shell 202 in different protection device installation areas, the change of the surrounding water flow pressure or the pressure change caused by touching the object can be sensed, so as to judge whether there is an obstacle in the surrounding environment.

[0052] In an embodiment, there are eight protection device installation areas in total, and each of the eight protection device installation areas is provided with a protection shell 202. Four protection device installation areas form a group, and two groups of protection device installation areas are arranged above and below the monitoring device installation area, that is, four protection shells 202 are located above the camera guide rail 215, and four protection shells 202 are located below the camera guide rail 215. Each group of protection device installation areas is a pair of each other, and two pairs of protection device installation areas are arranged on two opposite sides of the water tank 201, that is, four protection shells 202 are located between the grabbing device installation area and the power device installation area on one side of the water tank 201, and the other four protection shells 202 are located between the grabbing device installation area and the power device installation area on the other side of the water tank 201. The eight protection shells 202 are arranged on the one hand to cover a wider and more detailed range, which is conducive to judging the obstacles in the corresponding directions around, and on the other hand, it is also convenient for production, maintenance and installation. There is a gap between the upper and lower groups of protection shells 202, which is convenient for the mobile light supplement camera to shoot.

[0053] In an embodiment, the mobile light supplement camera can also cooperate with the protection shell 202, that is, when the protection shell 202 knows where there is an obstacle, the mobile light supplement camera can move to the vicinity of which protection shell 202 along the camera guide rail 215, and judge whether it is an obstacle or a transported mass through the camera information. The size and direction of the obstacle and the transported mass are roughly the same, so as to improve the driving and collecting efficiency in the case of complex and unknown underwater conditions, quickly and efficiently capture the transported mass around the device that meets the conditions, and observe whether there is danger in the surrounding environment, so as to better collect the image information of the surrounding environment.

[0054] In an embodiment, the water tank 201 is provided with a controller, the controller is provided with control software and calculation software, the control software is used for controlling the working of the above-mentioned mechanisms and devices, receiving image and pressure information, and the calculation software is provided with a calculation method, which is used for calculating according to the information obtained by the camera and the information obtained by the laser profile measurement head 312.

[0055] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, according to the idea of the utility model, the specific implementation mode and application range will be changed by the general technical personnel in the field. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A bedload collection device, characterized by: The water tank is provided with a side wall, and a grabbing device mounting area is arranged on the side wall of the water tank.

2. The eluvium collection device of claim 1, wherein: The grabbing device mounting area is further provided with a speedometer.

3. The eluvium collection device of claim 1, wherein: The grabbing device comprises a grabbing hand, and the grabbing hand comprises a grabbing bottom plate and an octopus bionic tentacle arranged on the grabbing bottom plate.

4. The eluvium collection device of claim 3, wherein: The grabbing bottom plate is provided with a plurality of octopus bionic tentacles, and the plurality of octopus bionic tentacles are arranged in a circumferential direction of the grabbing bottom plate.

5. The eluvium collection device of claim 4, wherein: The grabbing device further comprises a connecting column, a telescopic rod and a movable joint.

6. The eluvium collection device of claim 2, wherein: The water tank is further provided with a power device mounting area on the side wall.

7. The eluvium collection device of claim 6, wherein: The water tank is in a cylindrical shape, and the water tank is provided with a floating chamber and a gas storage chamber.

8. The eluvium collection device of claim 7, wherein: The water tank is further provided with a monitoring device mounting area on the side wall.

9. The eluvium collection device of claim 8, wherein: The monitoring device mounting area is located between the grabbing device mounting area and the power device mounting area.

10. The eluvium collection device of claim 9, wherein: The monitoring device mounting area is further provided with a protection device mounting area. The protection device mounting area is further provided with a protection device. The protection device comprises a protection shell, and the protection shell extends outwardly and exceeds the monitoring device. The protection device mounting area is arranged in a circumferential direction of the side wall of the water tank. Each of the protection device mounting areas is provided with an installation base. The installation base is provided with an installation slot hole. The axis of the installation slot hole is perpendicular to the central axis of the water tank. The protection device further comprises a pressure sensor and a connecting rod. The pressure sensor is fixedly installed on the slot bottom of the installation slot hole. The measuring head of the pressure sensor is coaxially arranged with the installation slot hole. The connecting rod is slidably connected in the installation slot hole. One end of the connecting rod is fixedly connected with the measuring head of the pressure sensor. The other end of the connecting rod is fixedly connected with the protection shell.

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