Intelligent pit mud covering system

Through the intelligent cellar mud covering system, the coordinated operation of components such as the mud storage box, paving mechanism and pressure detection component is utilized to solve the problem of single function of the cellar mud covering equipment in the existing technology, realize the dense and compact and automatic covering of the cellar mud, and improve the paving effect.

CN117821186BActive Publication Date: 2025-10-10PRETTECH MASCH MFG CO LTD

Patent Information

Application Number
CN202311873820.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-29
Publication Date
2025-10-10
Estimated Expiration
2043-12-29

AI Technical Summary

Technical Problem

The existing pit mud covering equipment has a single function, poor spreading effect, low density, and the manual assistance is not intelligent enough.

Method used

An intelligent cellar mud covering system is adopted, including a mud storage box, a spreading mechanism, a pressure detection component, a vibration motor and an ultrasonic ranging sensor. Through the coordinated operation of the electric push rod, pressure sensor and vibration motor, the cellar mud can be compacted and automatically covered.

Benefits of technology

It achieves the density and compaction of the cellar mud, uniform thickness, reduces gaps, improves the spreading and cellar sealing effects, meets the covering needs of slots of different heights, and realizes efficient and automated cellar mud covering operations.

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Abstract

The application provides a smart pit mud covering system and belongs to the technical field of wine brewing equipment. The system comprises a mud storage box and a paving mechanism arranged at the lower side of the front end of the mud storage box. The paving mechanism comprises a fixing frame arranged at the lower side of the front end of the mud storage box. An electric push rod is arranged in each of the horizontally symmetrical mounting ports at the front end of the fixing frame. A connecting plate is arranged between the extension ends of the two electric push rods. A guide rod is slidably connected to each of the symmetrical sliding ports at the four corners of the connecting plate. A pressing plate is arranged between the lower ends of the four guide rods. Springs are arranged at the four corners of the upper surface of the pressing plate. The springs are movably sleeved with the outer portions of the vertically adjacent guide rods, respectively. The paving mechanism makes the kiln mud dense and compact, with uniform thickness, reduces the gaps generated during the covering of the kiln mud, greatly improves the paving and pit sealing effects, quickly spreads the kiln mud at the slot, and realizes efficient and automatic kiln mud covering operation.
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Description

Technical Field

[0001] The invention belongs to the technical field of winemaking equipment, and in particular relates to an intelligent cellar mud covering system. Background Art

[0002] In the winemaking industry, cellar mud is usually required to seal the cellar. Cellar mud is a special material used to cover the cellar entrance to achieve a closed environment. The cellar mud has a certain viscosity and humidity so that it can be closely combined with the lees at the cellar entrance. Currently, the cellar mud spreading process is usually carried out by a combination of mechanical equipment and manual labor.

[0003] When covering with existing cellar mud, a gantry with a walking function is usually used to move the mud storage box. During the movement, the cellar mud is spread on the lees in the cellar pit. The spread cellar mud is then compacted manually with the help of tools. Although this can achieve the purpose of covering with cellar mud, there are still some problems in daily use. First, the current spreading equipment has a relatively simple function and the spreading effect is not obvious. After spreading, the cellar mud is not dense enough, which makes the spread cellar mud relatively loose, with gaps and low density. Second, it requires manual assistance and is not intelligent enough. Summary of the Invention

[0004] In view of this, the present invention provides an intelligent cellar mud covering system, which can make the kiln mud dense and compact, with uniform thickness through the spreading mechanism, reduce the gaps generated during kiln mud covering, greatly improve the spreading and cellar sealing effects, and can quickly flatten the cellar mud at the groove mouth, meet the needs of covering the cellar mud at grooves of different heights, and realize efficient and automated cellar mud covering operations.

[0005] In order to solve the above technical problems, the present invention provides an intelligent pit mud covering system, including a mud storage box and a paving mechanism arranged at the lower side of the front end of the mud storage box, the paving mechanism includes a fixed frame arranged at the lower side of the front end of the mud storage box, electric push rods are provided in the installation holes arranged laterally symmetrically at the front end of the fixed frame, a connecting plate is provided at the lower end between the telescopic ends of the two electric push rods, guide rods are slidably connected in the sliding holes symmetrically arranged at the four corners of the connecting plate, a pressure plate is provided at the lower end between the four guide rods, symmetrically distributed springs are provided at the four corners of the upper surface of the pressure plate, the springs are respectively movably sleeved on the outside of the vertically adjacent guide rods, a pressure detection component is also provided on the lower surface of the connecting plate, the pressure detection component is cooperated with the upper end of the spring, a flattening component for flattening the pit mud is also provided at the lower end of the front side of the mud storage box, a discharging component is also provided at the lower end of the mud storage box, the electric push rods are electrically connected to the external single-chip microcomputer, and a distance measuring component for distance measurement is also provided at the rear end of the mud storage box.

[0006] The pressure detection assembly includes sliding caps that are respectively slidably connected to the outside of the guide rods. Symmetrically distributed pressure sensors are provided at the four corners of the lower surface of the connecting plate. The pressure sensors are respectively coordinated with the vertically adjacent sliding caps. The upper ends of the springs are respectively coordinated with the vertically adjacent sliding caps. The pressure sensors are all electrically connected to the external microcontroller.

[0007] The paving mechanism also includes vibration motors that are laterally symmetrically arranged on the upper surface of the pressure plate, and the vibration motors are electrically connected to the external single-chip computer; the paving mechanism also includes sliding rods that are laterally symmetrically arranged on the upper surface of the connecting plate, and the sliding rods are respectively slidably connected to the sliding holes that are laterally symmetrically arranged at the front end of the fixed frame.

[0008] The distance measuring component includes a rectangular plate arranged in the middle of the rear surface of the mud storage box, an ultrasonic distance measuring sensor is provided in the middle of the lower surface of the rectangular plate, and the ultrasonic distance measuring sensor is electrically connected to the external single chip computer.

[0009] The flattening assembly comprises a mounting plate arranged at the lower end of the front side of the mud storage box, and the flattening frames are rotatably connected in the rotating holes evenly arranged laterally at the front end of the mounting plate, and a driving assembly is also provided on the mounting plate.

[0010] The discharging assembly includes a transmission pipe, which is respectively arranged in the discharging ports evenly arranged laterally on the lower surface of the mud storage box, and the circular holes arranged at the front ends of the transmission pipes are rotatably connected to the spiral conveying frames.

[0011] The driving component includes an assembly plate respectively arranged at the front end of the left and right surfaces of the mounting plate, a rotating rod is rotatably connected at the lower end between the two assembly plates, the outer arc surface of the rotating rod is provided with a bevel gear 1 evenly distributed laterally, the front extension end of the spiral conveyor is provided with a bevel gear 2, and the bevel gear 2 is respectively meshed with the adjacent bevel gear 1 on the same side, the upper end of the two assembly plates is rotatably connected, the outer arc surface of the rotating rod is provided with a bevel gear 3 evenly distributed laterally, the upper extension end of the flattening frame is provided with a bevel gear 4, and the bevel gear 4 is respectively meshed with the adjacent bevel gear 3 on the same side.

[0012] The drive assembly also includes a motor arranged on the right side of the upper surface of the mounting plate. The right end of the motor's output shaft, the right extension end of the rotating rod, and the right extension end of the rotating rod are all provided with pulleys. The three pulleys are connected by belt transmission, and the motor is electrically connected to the external microcontroller.

[0013] The beneficial effects of the above technical solution of the present invention are as follows:

[0014] 1. The external single-chip microcomputer controls the electric push rod and the pressure sensor to operate synchronously. The telescopic end of the electric push rod moves downward, driving the connecting plate, guide rod, pressure plate, spring, vibration motor, pressure sensor and sliding cap to move downward synchronously. After the pressure plate contacts the flattened pit mud, the telescopic end of the electric push rod continues to move downward, and the pressure plate, vibration motor and guide rod will slide relative to the connecting plate under the action of the pit mud supporting force, and the spring will be compressed under the force. When the spring is compressed, it will apply pressure to the pressure sensor through the sliding cap. The pressure sensor monitors the pressure changes in real time and synchronizes the data to the external single-chip microcomputer. After the external single-chip microcomputer receives the data transmitted by the pressure sensor and reaches the preset threshold, the external single-chip microcomputer controls the electric push rod to stop operating and controls the vibration motor to operate at the same time. The operation of the vibration motor generates excitation force, which is transmitted to the flattened pit mud through the pressure plate, thereby making the pit mud dense and compact, with uniform thickness, reducing gaps when the pit mud is covered, and greatly improving the paving and pit sealing effects.

[0015] 2. The external single-chip computer controls the operation of the motor. The rotation of the motor output shaft drives the pulley on it to rotate synchronously. When the pulley on the motor rotates, it drives the rotating rod and the rotating rod to rotate synchronously through the belt and the other pulleys. The rotation of the rotating rod drives the bevel gear one to rotate synchronously. When the bevel gear one rotates, it drives the spiral conveyor rack to rotate synchronously through the bevel gear two engaged with it. The rotation of the spiral conveyor rack can evenly transfer the cellar mud stored in the mud storage box to the slot where the cellar mud needs to be covered. At the same time, the rotation of the rotating rod drives the bevel gear three to rotate synchronously. When the bevel gear three rotates, it drives the flattening rack to rotate synchronously through the bevel gear four engaged with it. The rotating flattening rack can quickly flatten the cellar mud at the slot.

[0016] 3. The relevant staff fixed the mud storage box and its accessories to the external walking gantry, and then the external single-chip computer controlled the ultrasonic ranging sensor and the external walking gantry to operate synchronously. The external single-chip computer controlled the operation of the ultrasonic ranging sensor. The transmitting end of the ultrasonic ranging sensor emitted an ultrasonic signal. The ultrasonic signal was reflected after contacting the pit mud covering slot. The reflected ultrasonic signal was received by the receiving end of the ultrasonic ranging sensor. The external single-chip computer then calculated the duration of the ultrasonic signal transmission and reception, and thus calculated the distance between the mud storage box and its accessories and the area to be covered with mud. The external single-chip computer then controlled the external walking gantry to move along the preset path, and adjusted the mud storage box and its accessories to move downward in coordination with the detected information, thereby meeting the needs of covering pit mud at slots of different heights, and realizing efficient and automated pit mud covering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the main structure of the intelligent pit mud covering system of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the paving mechanism of the present invention;

[0019] Figure 3 It is a schematic diagram of the planar structure of the present invention;

[0020] Figure 4 This is an enlarged structural diagram of point A of the present invention;

[0021] Figure 5 It is a schematic diagram of the enlarged structure of point B of the present invention.

[0022] Explanation of the reference numerals: 100, mud storage box; 200, fixed frame; 201, sliding rod; 202, connecting plate; 203, guide rod; 204, pressure plate; 205, spring; 206, vibration motor; 207, electric push rod; 300, sliding cap; 301, pressure sensor; 400, mounting plate; 401, flattening frame; 500, transmission tube; 501, spiral conveyor frame; 600, assembly plate; 601, rotating rod; 602, bevel gear one; 603, bevel gear two; 604, rotating rod; 605, bevel gear three; 606, bevel gear four; 607, motor; 608, pulley; 609, belt; 700, rectangular plate; 701, ultrasonic ranging sensor. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-5 , clearly and completely describing the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments derived by ordinary technicians in this field fall within the scope of protection of the present invention.

[0024] like Figure 1-5 As shown:

[0025] The present embodiment provides an intelligent pit mud covering system, including a mud storage box 100 and a paving mechanism arranged at the lower side of the front end of the mud storage box 100. The paving mechanism includes a fixing frame 200 arranged at the lower side of the front end of the mud storage box 100. Electric push rods 207 are provided in the installation openings arranged symmetrically at the front end of the fixing frame 200. A connecting plate 202 is provided at the lower end between the telescopic ends of the two electric push rods 207. Guide rods 203 are slidably connected in the sliding openings symmetrically arranged at the four corners of the connecting plate 202. A pressure plate 204 is provided at the lower end between the four guide rods 203. Springs 205 symmetrically distributed at the four corners of the upper surface of the pressure plate 204 are provided. The springs 205 are movably sleeved on the outside of the vertically adjacent guide rods 203. The lower surface of the connecting plate 202 is also provided with a pressure detection component, which is coordinated with the upper end of the spring 205. The front lower end of the mud storage box 100 is also provided with a flattening component for flattening the pit mud. The lower end of the mud storage box 100 is also provided with a discharging component. The electric push rods 207 are all electrically connected to the external single-chip computer. The rear end of the mud storage box 100 is also provided with a distance measuring component for distance measurement; the paving mechanism also includes a vibration motor 206 that is laterally symmetrically arranged on the upper surface of the pressure plate 204, and the vibration motor 206 is electrically connected to the external single-chip computer.

[0026] like Figure 1-5 As shown, the pressure detection assembly includes sliding caps 300 respectively slidably connected to the outside of the guide rod 203, and symmetrically distributed pressure sensors 301 are provided at the four corners of the lower surface of the connecting plate 202. The pressure sensors 301 are respectively matched with the vertically adjacent sliding caps 300, and the upper ends of the springs 205 are respectively matched with the vertically adjacent sliding caps 300. The pressure sensors 301 are all electrically connected to the external microcontroller.

[0027] like Figure 1-4 As shown, the flattening assembly includes a mounting plate 400 arranged at the lower end of the front side of the mud storage box 100, and the flattening frames 401 are rotatably connected in the rotating holes uniformly arranged laterally at the front end of the mounting plate 400, and a driving assembly is also provided on the mounting plate 400.

[0028] like Figure 1-4 As shown, the discharging assembly includes a transmission pipe 500, which is respectively arranged in the discharging ports uniformly arranged laterally on the lower surface of the mud storage box 100, and a spiral conveying frame 501 is rotatably connected to the circular hole set at the front end of the transmission pipe 500.

[0029] like Figure 1-4As shown, the driving assembly includes an assembly plate 600 respectively arranged at the front end of the left and right surfaces of the mounting plate 400, a rotating rod 601 is rotatably connected at the lower end between the two assembly plates 600, and the outer arc surface of the rotating rod 601 is provided with a bevel gear 1 602 evenly distributed laterally, and the front side extension end of the spiral conveyor 501 is provided with a bevel gear 2 603, and the bevel gear 2 603 is respectively meshed with the adjacent bevel gear 1 602 on the same side, and the upper end of the two assembly plates 600 is rotatably connected with a rotating rod 604, and the outer arc surface of the rotating rod 604 is provided with a bevel gear 1 602 evenly distributed laterally. The evenly distributed bevel gear three 605 and the upper extension end of the flattening frame 401 are each provided with a bevel gear four 606, and the bevel gear four 606 are respectively engaged with the adjacent bevel gear three 605 on the same side; the driving component also includes a motor 607 arranged on the right side of the upper surface of the mounting plate 400, and the right end of the output shaft of the motor 607, the right extension end of the rotating rod 601 and the right extension end of the rotating rod 604 are each provided with a pulley 608, and the three pulleys 608 are connected by a belt 609, and the motor 607 is electrically connected to the external single-chip computer.

[0030] like Figure 3As shown, the distance measuring component includes a rectangular plate 700 arranged in the middle of the rear surface of the mud storage box 100, and an ultrasonic distance measuring sensor 701 is provided in the middle of the lower surface of the rectangular plate 700. The ultrasonic distance measuring sensor 701 is electrically connected to the external single-chip computer. The working principle of the intelligent pit mud covering system provided by the present invention is as follows: first, the relevant staff fixes the mud storage box 100 and its ancillary mechanisms to the external walking gantry, and then the external single-chip computer controls the ultrasonic distance measuring sensor 701 and the external walking gantry to operate synchronously. The external single-chip computer controls the operation of the ultrasonic distance measuring sensor 701. The transmitting end of the ultrasonic distance measuring sensor 701 transmits an ultrasonic signal. The ultrasonic signal is reflected after contacting the pit mud covering groove, and the reflected ultrasonic signal is detected by the ultrasonic distance measuring device. The sensor 701 receives the ultrasonic signal at the receiving end, and then the external single-chip computer calculates the duration of the ultrasonic signal transmission and reception, thereby calculating the distance between the mud storage box 100 and its ancillary mechanisms and the area required to be covered with the pit mud. The external single-chip computer then controls the external walking gantry to move along a preset path, and adjusts the mud storage box 100 and its ancillary mechanisms to move downward in accordance with the detected information, thereby meeting the needs of covering the pit mud at slots of different heights, and realizing efficient and automated pit mud covering operations. At the same time, the external single-chip computer controls the operation of the motor 607, and the rotation of the output shaft of the motor 607 drives the pulley 608 on it to rotate synchronously. When the pulley 608 on the motor 607 rotates, it drives the rotating rod 601 through the belt and the remaining pulleys 608. The rotating rod 604 rotates synchronously, and the rotating rod 601 rotates to drive the bevel gear 1 602 to rotate synchronously. When the bevel gear 1 602 rotates, it drives the spiral conveying frame 501 to rotate synchronously through the bevel gear 2 603 meshing with it. The rotation of the spiral conveying frame 501 can evenly transfer the pit mud stored in the mud storage box 100 to the slot where the pit mud needs to be covered. At the same time, the rotating rod 604 rotates to drive the bevel gear 3 605 to rotate synchronously, and when the bevel gear 3 605 rotates, it drives the flattening frame 401 to rotate synchronously through the bevel gear 4 606 meshing with it. The rotating flattening frame 401 can quickly flatten the pit mud at the slot. At the same time, the external single-chip microcomputer controls the electric push rod 207 and the pressure sensor 301 to operate synchronously. The telescopic end of the push rod 207 moves downward, driving the connecting plate 202, the guide rod 203, the pressure plate 204, the spring 205, the vibration motor 206, the pressure sensor 301 and the sliding cap 300 to move downward synchronously. After the pressure plate 204 contacts the flattened pit mud, the telescopic end of the electric push rod 207 continues to move downward, and the pressure plate 204, the vibration motor 206 and the guide rod 203 will slide relative to the connecting plate 202 under the action of the pit mud supporting force, and the spring 205 will be compressed by the force. When the spring 205 is compressed, it will apply pressure to the pressure sensor 301 through the sliding cap 300. The pressure sensor 301 monitors the pressure changes in real time and synchronizes the data to the external single-chip microcomputer. After the external single-chip microcomputer receives the data transmitted by the pressure sensor 301 and reaches the preset threshold,The external single-chip computer controls the electric push rod 207 to stop operating, and simultaneously controls the vibration motor 206 to operate. The vibration motor 206 generates an exciting force, which is transmitted to the flattened pit mud through the pressure plate 204, making the pit mud dense and compact, with a uniform thickness, reducing gaps when the pit mud is covered, and greatly improving the spreading and sealing effect.

[0031] like Figure 1-3 As shown, the paving mechanism also includes a sliding rod 201 that is laterally symmetrically arranged on the upper surface of the connecting plate 202. The sliding rod 201 is slidably connected to the sliding holes that are laterally symmetrically arranged at the front end of the fixed frame 200. The sliding rod 201 can serve as a guiding and sliding support for the connecting plate 202 and its auxiliary mechanisms.

[0032] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. Intelligent pit mud covering system, characterized by: The invention comprises a mud storage box (100) and a paving mechanism arranged at the lower side of the front end of the mud storage box (100), wherein the paving mechanism comprises a fixing frame (200) arranged at the lower side of the front end of the mud storage box (100), wherein electric push rods (207) are arranged in the installation openings arranged symmetrically in the transverse direction at the front end of the fixing frame (200), a connecting plate (202) is arranged at the lower end between the telescopic ends of the two electric push rods (207), wherein guide rods (203) are slidably connected in the sliding openings arranged symmetrically at the four corners of the connecting plate (202), a pressure plate (204) is arranged at the lower end between the four guide rods (203), and symmetrically distributed springs (205) are arranged at the four corners of the upper surface of the pressure plate (204), wherein the springs (205) are respectively movably sleeved on the outside of the vertically adjacent guide rods (203), and the lower surface of the connecting plate (202) is also provided with a pressure detection mechanism. The pressure detection component is arranged in cooperation with the upper end of the spring (205); the front lower end of the mud storage box (100) is also provided with a flattening component for flattening the pit mud; the lower end of the mud storage box (100) is also provided with a discharging component; the electric push rods (207) are all electrically connected to an external single-chip computer; the rear end of the mud storage box (100) is also provided with a distance measurement component for distance measurement; the paving mechanism further includes a vibration motor (206) symmetrically arranged on the upper surface of the pressure plate (204); the vibration motor (206) is electrically connected to the external single-chip computer; the flattening component includes a mounting plate (400) arranged at the front lower end of the mud storage box (100); the flattening frame (401) is rotatably connected in the rotating holes uniformly arranged in the horizontal direction at the front end of the mounting plate (400); and the mounting plate (400) is also provided with a driving component.

2. The intelligent pit mud covering system according to claim 1, characterized in that: The paving mechanism further comprises sliding rods (201) arranged transversely and symmetrically on the upper surface of the connecting plate (202), and the sliding rods (201) are respectively slidably connected to sliding holes arranged transversely and symmetrically at the front end of the fixing frame (200).

3. The intelligent pit mud covering system according to claim 1, characterized in that: The pressure detection assembly includes sliding caps (300) respectively connected to the outside of the guide rod (203) in a sliding manner. The four corners of the lower surface of the connecting plate (202) are provided with symmetrically distributed pressure sensors (301). The pressure sensors (301) are respectively arranged in cooperation with the vertically adjacent sliding caps (300). The upper ends of the springs (205) are respectively arranged in cooperation with the vertically adjacent sliding caps (300). The pressure sensors (301) are all electrically connected to an external single-chip computer.

4. The intelligent pit mud covering system according to claim 1, characterized in that: The discharge assembly comprises a transmission pipe (500), the transmission pipes (500) being respectively arranged in discharge openings uniformly arranged laterally on the lower surface of the mud storage box (100), and a spiral conveying frame (501) being rotatably connected to a circular hole arranged at the front end of the transmission pipe (500).

5. The intelligent pit mud covering system according to claim 4, characterized in that: The driving assembly includes an assembly plate (600) respectively arranged at the front end of the left and right surfaces of the mounting plate (400), a rotating rod (601) is rotatably connected between the lower ends of the two assembly plates (600), the outer arc surface of the rotating rod (601) is provided with a bevel gear one (602) evenly distributed laterally, the front extension end of the spiral conveying frame (501) is provided with a bevel gear two (603), the bevel gear two (603) is respectively meshed with the adjacent bevel gear one (602) on the same side, the upper end of the two assembly plates (600) is rotatably connected, the outer arc surface of the rotating rod (604) is provided with a bevel gear three (605) evenly distributed laterally, the upper extension end of the flattening frame (401) is provided with a bevel gear four (606), the bevel gear four (606) is respectively meshed with the adjacent bevel gear three (605) on the same side.

6. The intelligent pit mud covering system according to claim 5, characterized in that: The driving assembly further comprises a motor (607) arranged on the right side of the upper surface of the mounting plate (400), the right end of the output shaft of the motor (607), the right side extension end of the rotating rod (601) and the right side extension end of the rotating rod (604) are all provided with pulleys (608), and the three pulleys (608) are connected to each other via a belt (609), and the motor (607) is electrically connected to an external single-chip microcomputer.

7. The intelligent pit mud covering system according to claim 1, characterized in that: The distance measuring component comprises a rectangular plate (700) arranged in the middle of the rear surface of the mud storage box (100), an ultrasonic distance measuring sensor (701) is provided in the middle of the lower surface of the rectangular plate (700), and the ultrasonic distance measuring sensor (701) is electrically connected to an external single chip computer.

Citation Information

Patent Citations

  • Cement pavement paving and maintaining all-in-one machine for road construction

    CN111379209A

  • Pit mud paving equipment

    CN219864113U

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