LU600975B1 - High-precision concrete video image acquisition system and acquisition method - Google Patents

Abstract

The present invention provides a high-precision concrete video image acquisition system, relating to the field of image acquisition, comprising: a mounting plate, configured to be mounted on the upper portion of the inner wall of a feed hopper; an acquisition box, arranged on the mounting plate, the acquisition box having an open end; an acquisition mechanism, arranged within the acquisition box, the acquisition mechanism comprising an acquisition unit, the acquisition unit being capable of rotating out of the acquisition box through the open end; a sealing mechanism, comprising a sealing door, the sealing door sliding in the horizontal direction to open or close the open end; a positioning mechanism, comprising a first positioning sensor and a second positioning sensor, the first positioning sensor being used to determine whether the acquisition unit is in the initial position, and the second positioning sensor being used to acquire the rotation angle of the acquisition unit; a control mechanism, comprising a PLC, the PLC being arranged on the upper portion of the outer wall of the feed hopper, and the PLC being respectively signal connected to each part; the present application adopts a sealable acquisition box to accommodate the acquisition unit, enabling the acquisition unit to effectively reduce the influence of dust and humid environments, and improve the pass rate of image acquisition.

Description

HIGH-PRECISION CONCRETE VIDEO IMAGE ACQUISITION SYSTEM AND

ACQUISITION METHOD

Technical Field

The present invention relates to the field of image acquisition, and more particularly to a high-precision concrete video image acquisition system and acquisition method.

Background Technology

Concrete mixer trucks, as an essential piece of equipment in modern construction, play a crucial role in ensuring the safety and efficiency of operations, which in turn directly affects the quality and progress of engineering projects. With the rapid advancement of technology, particularly driven by the Internet of Things, artificial intelligence, and video surveillance technologies, concrete video image acquisition systems based on the mixer truck platform have emerged. These systems aim to enhance monitoring and management during the transportation and construction of concrete through intelligent means. Such systems can not only monitor the quality and transportation status of concrete in real time but also effectively prevent operational accidents and ensure construction safety, representing a highly promising technological innovation in the construction industry.

Some enterprises have already begun to implement monitoring systems based on loT and big data analysis in mixer trucks to monitor the concrete’s condition in real time. These systems typically integrate multiple sensors, such as temperature sensors, humidity sensors, and accelerometers, to collect real-time data on the concrete during transportation and transmit it to a cloud platform. Algorithms are then used to analyze the data in real time, providing construction teams with accurate information on the concrete's quality status.

Among these, image acquisition-based monitoring has become one of the more advanced technologies in recent years. This technology can record the surface condition and flow behavior of concrete in real time. Through image processing 7600975 algorithms, it can analyze segregation phenomena, sedimentation trends, and other parameters during the mixing process. A fundamental technical requirement for image acquisition is to obtain high-definition image data. However, during transportation, mixer trucks experience significant vibrations, jolts, and dust, which can interfere with image acquisition devices, degrade image quality, and negatively affect the accuracy of recognition results.

Therefore, the present application proposes a high-precision concrete video image acquisition system designed to obtain high-quality image data.

Summary of the Invention

The present invention provides a high-precision concrete video image acquisition system and acquisition method, aiming to solve the problems in existing image acquisition monitoring processes, such as poor image quality and low pass rate of acquired images.

To achieve the above objective, an embodiment of the present invention provides a high-precision concrete video image acquisition system, comprising: a mounting plate , configured to be mounted on the upper portion of the inner wall of a feed hopper; an acquisition box , arranged on the mounting plate , the acquisition box having an open end, the open end being parallel to the mounting plate ; an acquisition mechanism , arranged within the acquisition box , the acquisition mechanism comprising a rotating shaft , a first driving unit , and an acquisition unit , the rotating shaft being arranged in the lower part of the acquisition box along the horizontal direction, the acquisition unit being fixed on the radial side of the rotating shaft , and the first driving unit driving the rotating shaft to rotate so that the acquisition unit rotates out of the acquisition box through the open end; a sealing mechanism , comprising a sealing door and a second driving unit, the second driving unit driving the sealing door to slide horizontally to close or open the open end;

a positioning mechanism, comprising a first positioning sensor and a second 7600975 positioning sensor , the first positioning sensor being used to determine whether the acquisition unit is in the initial position, and the second positioning sensor being used to acquire the rotation angle of the acquisition unit ; a control mechanism , comprising a PLC, the PLC being arranged on the upper portion of the outer wall of the feed hopper; the PLC being respectively signal connected to the first driving unit , the acquisition unit , the second driving unit, the first positioning sensor , and the second positioning sensor .

Preferably, the first driving unit comprises a speed reducer and a first driving motor, the rotating shaft being in transmission connection with the first driving motor through the speed reducer; the speed reducer is a worm gear reducer; a bearing seat is further arranged in the horizontal direction, and the rotating shaft passes through the bearing seat ; a connecting rod is arranged on the radial side of the rotating shaft , and the acquisition unit is fixed on the radial side of the rotating shaft via the connecting rod.

Preferably, the acquisition box comprises a bottom plate configured to be disposed on the mounting plate , and side plates surrounding the bottom plate , a damper is further provided between the bottom plate and the mounting plate , and an avoidance groove is formed in the lower side plate , the avoidance groove being used to accommodate the connecting rod ; the first positioning sensor and the second positioning sensor are fixedly disposed on the bottom plate .

Preferably, the second driving unit comprises a second driving motor and a lead screw, the second driving motor being disposed above the acquisition box, an output end of the second driving motor being in transmission connection with the lead screw, and a bracket configured to be connected with the sealing door being screwed on the lead screw ; the sealing mechanism further comprises a motor box , and the second driving unit is disposed inside the motor box.

Preferably, the acquisition box is provided with guide grooves at its upper and 7600975 lower ends, and the upper and lower ends of the sealing door are respectively provided with universal balls , the universal balls at the upper and lower ends of the sealing door are slidably disposed in the guide grooves at the upper and lower ends, respectively.

Preferably, the control mechanism further comprises a control box and an angle iron , the PLC being arranged inside the control box , and the control box being fixed to the upper end of the outer wall of the feed hopper via the angle iron .

Preferably, a fill light is further disposed along the circumferential direction of the acquisition unit, and the fill light is controlled by the PLC.

The present application further provides an acquisition method employing the above high-precision concrete video image acquisition system, comprising: after receiving a startup command, the PLC sends an opening signal to the second driving unit to open the sealing door , and sends a forward rotation signal to the first driving unit to drive the acquisition unit to rotate; the PLC acquires the angle information collected by the second positioning sensor , the angle information comprising the rotation angle of the acquisition unit ; when the rotation angle of the acquisition unit matches a preset angle, the PLC sends a stop signal to the first driving unit ; the PLC sends a shooting signal to the acquisition unit and sends a fill light signal to the fill light.

Preferably, the acquisition method further comprises the following steps: after receiving a shutdown command, the PLC sends a closing signal to the second driving unit to close the sealing door , and sends a reverse rotation signal to the first driving unit to drive the acquisition unit to rotate; the PLC acquires the angle information collected by the second positioning sensor , and when the rotation angle of the acquisition unit matches the preset angle, the PLC sends a stop signal to the first driving unit ; the PLC acquires the position information collected by the first positioning sensor, the position information including whether the acquisition unit is in the initial position;

when the current position of the acquisition unit is in the initial position, the PLC sends 7600975 a power-off signal to the fill light to turn off the fill light

The above solution of the present invention has the following advantageous effects: 5 First, the present application adopts a sealable acquisition box to accommodate the acquisition unit. When image acquisition is required, the acquisition unit rotates out of the acquisition box to perform image acquisition, and when image acquisition is not required, the acquisition unit remains inside the acquisition box, thereby effectively reducing the influence of dust and humidity on the acquisition unit and improving the pass rate of image acquisition.

Second, a damper is arranged between the mounting plate and the bottom plate in the present application. The damper alleviates the effect of vibration on the stability of the acquisition unit, that the acquisition unit reduces shaking caused by vibrations, and further improves the pass rate of image acquisition.

Third, the acquisition unit of the present application can continuously capture images of a designated area of concrete, reducing invalid information in the image, improving the efficiency and accuracy of information transmission, and lowering the computational power required for subsequent image processing.

Other features and advantages of the present invention will be described in detail in the following specific embodiments.

Description of the Drawings

FIG. 1 is a first perspective view of the present invention (feed hopper omitted);

FIG. 2 is an internal schematic view from the first perspective of the present invention;

FIG. 3 is a second perspective view of the present invention (feed hopper omitted);

FIG. 4 is an internal schematic view from the second perspective of the present invention;

FIG. 5 is a schematic view of the sealing door and universal ball.

Reference Numerals:

100. Mounting plate; 7600975 200. Acquisition box; 210. Bottom plate; 220. Side plate; 240. Avoidance groove; 250. Guide groove; 260. Limit block; 300. Acquisition mechanism; 310. Rotating shaft; 320. First driving unit; 321.

Speed reducer; 322. First driving motor; 330. Acquisition unit; 340. Bearing seat; 350. Connecting rod; 400. Sealing mechanism; 410. Sealing door; 411. Universal ball; 421. Second driving motor; 422. Lead screw; 423. Bracket; 424. Motor box; 510. First positioning sensor; 520. Second positioning sensor; 600. Control mechanism; 610. PLC; 620. Control box; 630. Angle iron.

Detailed Embodiments

To make the technical problems, technical solutions, and advantages to be solved by the present invention more clearly understood, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGs. 1 to 5, an embodiment of the present invention provides a high- precision concrete video image acquisition system, comprising a mounting plate 100, an acquisition box 200, an acquisition mechanism 300, a sealing mechanism 400, a positioning mechanism, and a control mechanism 600. The mounting plate 100 serves as the installation reference for the acquisition box 200. The mounting plate 100 is detachably mounted on the upper portion of the inner wall of the feed hopper. The acquisition box 200 is disposed on the mounting plate 100. The acquisition box 200 has an open end. The open end is parallel to the mounting plate 100. In the present application, the open end is located on the side away from the mounting plate 100.

The acquisition mechanism 300 is arranged inside the acquisition box 200. The acquisition mechanism 300 comprises a rotating shaft 310, a first driving unit 320, and an acquisition unit 330. The rotating shaft 310 is rotatably arranged at the lower part of the acquisition box 200. The longitudinal direction of the rotating shaft 310 extends horizontally. The acquisition unit 330 is fixed on the radial side of the rotating shaft 310. The first driving unit 320 is in transmission connection with the rotating shaft 310 to drive the rotating shaft 310 to rotate. When the rotating shaft 310 rotates, the 7600975 acquisition unit 330 mounted on the rotating shaft 310 rotates simultaneously. During the rotation process of the acquisition unit 330, it extends out of the acquisition box 200 through the open end, thereby avoiding obstruction of the acquisition unit 330 by the acquisition box 200.

The sealing mechanism 400 comprises a sealing door 410 and a second driving unit. The sealing door 410 is used to seal the open end. The second driving unit drives the sealing door 410 to slide along the horizontal direction. When the acquisition unit 330 needs to rotate out of the acquisition box 200, the sealing door 410 slides in a direction away from the acquisition box 200 to open the open end. When the acquisition unit 330 does not need to rotate out of the acquisition box 200, the sealing door 410 covers the open end to seal the acquisition box 200, thereby preventing dust and moisture from the feed hopper from entering and affecting the operating performance of the acquisition unit 330.

The positioning mechanism comprises a first positioning sensor 510 and a second positioning sensor 520. The first positioning sensor 510 determines whether the acquisition unit 330 is currently in the initial position. The second positioning sensor 520 is used to acquire the rotation angle of the acquisition unit 330.

The control mechanism 600 comprises a PLC 610. The PLC 610 is arranged on the upper portion of the outer wall of the feed hopper. The PLC 610 is in signal connection with the first driving unit 320, the acquisition unit 330, the second driving unit, the first positioning sensor 510, and the second positioning sensor 520, respectively.

Furthermore, the first driving unit 320 comprises a speed reducer 321 and a first driving motor 322. The output shaft of the first driving motor 322 is in transmission connection with the input shaft of the speed reducer 321. The output shaft of the speed reducer 321 is in transmission connection with the rotating shaft 310.

Preferably, the speed reducer 321 is a worm gear reducer. The worm gear reducer has a power-off self-locking characteristic. In combination with the structure of the present application, the worm gear reducer is capable of maintaining the position of the acquisition unit 330 stable in the event of a power outage, thereby preventing image blurring caused by vibrations during transportation, ensuring that the 7600975 acquisition unit 330 maintains excellent imaging accuracy in environments with frequent vibrations, and meeting the requirement of acquiring high-quality data.

In the present embodiment, a bearing seat 340 is further provided inside the acquisition box 200. The bearing is arranged in the horizontal direction and aligned with the axial line of the rotating shaft 310, such that the rotating shaft 310 is inserted through the bearing seat 340. Through the bearing seat 340 and the transmission connection between the rotating shaft 310 and the speed reducer 321, it is ensured that the rotating shaft 310 remains in the horizontal direction.

A connecting rod 350 is further provided on the radial side of the rotating shaft 310. One end of the connecting rod 350 is fixed on the rotating shaft 310, and the other end is fixedly connected to the acquisition unit 330.

The acquisition box 200 comprises a bottom plate 210 and a surrounding plate 220. A plurality of dampers are arranged on the bottom plate 210. One end of each damper is connected to the bottom plate 210, and the other end is connected to the mounting plate 100. By arranging the dampers, the vibration of the bottom plate 210 can be effectively reduced, thereby mitigating the vibration of the acquisition unit 330 and ensuring, from another aspect, the requirement of acquiring high-quality data.

The surrounding plate 220 is arranged on the bottom plate 210, and the surrounding plate 220 and the dampers are located on both sides of the bottom plate 210. An avoidance groove 240 is provided on the lower portion of the surrounding plate 220.

The avoidance groove 240 is used to accommodate the connecting rod 350 during the rotation of the acquisition unit 330, thereby avoiding obstruction of the rotation of the acquisition unit 330 by the surrounding plate 220.

Furthermore, a limit block 260 is provided on the bottom plate 210. The limit block 260 is located on the rotation path of the connecting rod 350. When the acquisition unit 330 is in the initial position, the connecting rod 350 abuts against the limit block 260, at which point the acquisition unit 330 is in the vertical direction.

Preferably, the first positioning sensor 510 is located below the limit block 260.

The first positioning sensor 510 is used to determine whether the connecting rod 350 is in the initial position. The first positioning sensor 510 is a photoelectric sensor. A first 7600975 sensing element is provided on the radial side of the connecting rod 350. When the acquisition unit 330 rotates out of the acquisition box 200, the first sensing element exits the first positioning sensor 510, and the PLC 610 determines that the connecting rod 350 has left the initial position. Similarly, when the acquisition unit 330 rotates into the acquisition box 200, the first sensing element enters the first positioning sensor 510, and the PLC 610 determines that the connecting rod 350 is in the initial position.

The second positioning sensor 520 is disposed at one end of the rotating shaft 310. The second positioning sensor 520 is used to acquire the rotation angle of the rotating shaft 310. Preferably, a second sensing element is provided at the end of the rotating shaft 310 near the second positioning sensor 520. The second sensing element interacts with the second positioning sensor 520. The second sensing element protrudes from the side surface of the rotating shaft 310. The projection angle between the second sensing element and the connecting rod 350 on the end face of the rotating shaft 310 is 30°.

The sealing mechanism 400 comprises a motor box 424, a second driving motor 421, and a lead screw 422. The motor box 424 is fixedly arranged above the acquisition box 200. The second driving motor 421 and the lead screw 422 are both arranged inside the motor box 424. The second driving motor 421 is in transmission connection with the lead screw 422. A sliding groove is further provided below the lead screw 422.

The sliding groove is arranged along the longitudinal direction of the lead screw 422.

A bracket 423 is threadedly connected to the lead screw 422. The lower end of the bracket 423 is slidably connected to the sliding groove. When the second driving motor 421 operates, the bracket 423 slides along the longitudinal direction of the sliding groove. The bracket 423 is used to connect to the sealing door 410, thereby driving the sealing door 410 to move. It is understood that the longitudinal direction of the sliding groove is the same as the horizontal direction.

Preferably, the lower end of the bracket 423 passes through the motor box 424 and is fixedly connected to the sealing door 410. The first driving motor 322 and the second driving motor 421 are stepper motors. 7600975

The acquisition box 200 is provided with guide grooves 250 at the upper end and the lower end, respectively. The upper end and the lower end of the sealing door 410 are respectively provided with universal balls 411. The universal ball 411 at the upper end of the sealing door 410 is slidably arranged in the upper guide groove 250. The universal ball 411 at the lower end of the sealing door 410 is slidably arranged in the lower guide groove 250. Due to the presence of the universal balls 411, the sealing door 410 can slide more easily within the guide grooves 250. In combination with the dusty environment of the feed hopper, this effectively prevents the sealing door 410 from failing due to friction caused by dust.

The control mechanism 600 further comprises a control box 620 and an angle iron 630. The PLC 610 is arranged inside the control box 620. The control box 620 is fixed to the upper end of the outer wall of the feed hopper via the angle iron 630. Wiring holes are respectively provided in the angle iron 630, the mounting plate 100, and the side wall of the feed hopper.

Preferably, a fill light is further arranged along the circumferential direction of the acquisition unit 330. The fill light moves synchronously with the acquisition unit 330.

The fill light provides illumination for the acquisition unit 330 during the acquisition unit 330 captures image. Preferably, the acquisition unit 330 is a camera.

In the present application, a power supply mechanism is further included. The power supply mechanism supplies power to the first driving unit 320, the acquisition unit 330, the second driving unit, the first positioning sensor 510, the second positioning sensor 520, the PLC 610, and the fill light. Preferably, the fill light is electrically connected to an electromagnetic switch. The electromagnetic switch is in signal connection with the PLC 610, thereby controlling the turning on and off of the fill light.

In the present application, the acquisition unit 330 is designed to be located inside the acquisition box 200 and to rotate out of the acquisition box 200 or retract into the acquisition box 200 depending on different working states. When acquisition is not required, the acquisition box 200 is sealed by the sealing door 410, effectively preventing dust and moisture from entering the acquisition box 200 and 7600975 contaminating or interfering with the operation of the acquisition unit 330. Similarly, the sealing structure adopts a fully enclosed protective structure, effectively preventing dust and moisture from entering the motor box 424. This protective approach improves the reliability of the acquisition unit 330 and extends the service life of the acquisition unit 330 under high-dust, humid, and vibratory environments.

In addition, the present application adopts a worm gear reducer, which has a power-off self-locking function. In combination with the first driving motor 322, it ensures that the acquisition unit 330 rotates to the same position and remains fixed in that position for image capturing, thereby avoiding variation in the position of the acquisition unit 330 during each image capture, which would otherwise result in acquired images containing invalid information.

The present application further provides an acquisition method, employing the above-mentioned high-precision concrete video image acquisition system, comprising the following steps:

After receiving a start command, the PLC 610 sends an opening signal to the second driving unit to open the sealing door 410 and sends a forward rotation signal to the first driving unit 320 to drive the acquisition unit 330 to rotate forward.

The start command may be issued by an operator or may be a preset instruction stored in the PLC 610, which is triggered under specific conditions, such as a periodic cycle command to acquire concrete images at preset time intervals. After receiving the opening signal, the second driving unit causes the second driving motor 421 to rotate forward, whereby the sealing door 410 moves in a direction away from the acquisition box 200, leaving the open end unobstructed. After receiving the forward rotation signal, the first driving unit 320 causes the first driving motor 322 to rotate forward, whereby the acquisition unit 330 rotates out from the open end.

Preferably, the second driving unit executes the opening signal before the first driving unit 320 executes the forward rotation signal, thereby preventing the acquisition unit 330 from colliding with the sealing door 410.

During the outward rotation of the acquisition unit 330, the second positioning sensor 520 acquires the angle information of the acquisition unit 330 based on the 7600975 number of rotations of the rotating shaft 310 and transmits the angle information to the PLC 610. The angle information includes the rotation angle of the acquisition unit 330. When the rotation angle of the acquisition unit 330 matches the preset angle, the

PLC 610 sends a stop signal to the first driving unit 320.

During the outward rotation of the acquisition unit 330, the second positioning sensor 520 continuously acquires the angle of the acquisition unit 330 and converts the angle into angle information transmitted to the PLC 610. The PLC 610 compares the acquired rotation angle with the preset angle stored in the PLC 610. When the rotation angle matches the preset angle, the PLC 610 sends a stop signal to the first driving motor 322. The rotating shaft 310 is in transmission connection with the first driving motor 322 via the worm gear reducer. Therefore, when the first driving motor 322 stops, under the action of the worm gear reducer, the acquisition unit 330 maintains the current angle unchanged. That is, during the stop process, the acquisition unit 330 can continuously acquire images of the same concrete position.

After the acquisition unit 330 rotates to the preset angle, the PLC 610 sends a shooting signal to the acquisition unit 330 and a fill light signal to the fill light. The acquisition unit 330 captures concrete images.

Preferably, the fill lighting action is executed prior to the shooting action, providing favorable lighting conditions for the acquisition unit 330.

In the present embodiment, the initial position of the acquisition unit 330 is parallel to the vertical direction. When the acquisition unit 330 is in the initial position, the acquisition end of the acquisition unit 330 faces upward. The preset angle stored in the PLC 610 is 180°. After the acquisition unit 330 rotates to the preset angle, the acquisition end of the acquisition unit 330 faces downward.

After the acquisition unit 330 captures the image, the acquisition unit 330 rotates back into the acquisition box 200. Specifically:

After receiving a shutdown command, the PLC 610 sends a door-closing signal to the second driving unit to close the sealing door 410 and sends a reverse rotation signal to the first driving unit 320 to rotate the acquisition unit 330 in reverse. 7600975

The shutdown command may likewise be issued manually or may be a preset instruction stored in the PLC 610, triggered under specific conditions, such as after capturing one or more images, or after remaining at the preset angle for a certain period of time.

After receiving the door-closing signal, the second driving unit causes the second driving motor 421 to rotate in reverse, driving the sealing door 410 to move in the direction of the acquisition box 200 until the sealing door 410 covers the open end.

After receiving the reverse rotation signal, the first driving unit 320 causes the first driving motor 322 to rotate in reverse, whereby the acquisition unit 330 rotates into the acquisition box.

The first driving unit 320 executes the reverse rotation signal before the second driving unit executes the door-closing signal, in order to prevent the sealing door 410 from covering the open end before the acquisition unit 330 has returned to the acquisition box 200.

The PLC 610 acquires the angle information collected by the second positioning sensor 520. When the rotation angle of the acquisition unit 330 matches the preset angle, the PLC 610 sends a stop signal to the first driving unit 320.

During the inward rotation of the acquisition unit 330 into the acquisition box 200, the second positioning sensor 520 continuously acquires the rotation angle of the acquisition unit 330 and converts the rotation angle into angle information transmitted to the PLC 610. The PLC 610 compares the acquired rotation angle with the preset angle stored in the PLC 610. When the rotation angle matches the preset angle, the

PLC 610 sends a stop signal to the first driving unit 320. Since the angle for the acquisition unit 330 to rotate out of the acquisition box 200 is the same as the angle to rotate into the acquisition box 200, the acquisition unit 330 is thereby located at the initial position.

The PLC 610 acquires the position information collected by the first positioning sensor 510. The position information includes whether the acquisition unit 330 is at the initial position. When the current position of the acquisition unit 330 is determined to be at the initial position, the PLC 610 sends a power-off signal to the fill light to turn 7600975 off the fill light.

During the inward rotation of the acquisition unit 330 into the acquisition box 200, the first positioning sensor 510 acquires the position information of the acquisition unit 330 and determines whether the acquisition unit 330 is at the initial position.

When the acquisition unit 330 is determined to be at the initial position, the PLC 610 sends a power-off signal to the fill light. The high-precision concrete video image acquisition system thereby completes one image acquisition cycle.

The above description relates to the preferred embodiment of the present invention. It should be noted that, for those skilled in the art, various modifications and refinements may be made without departing from the principles of the present invention, and such modifications and refinements shall also be considered within the scope of protection of the present invention.

Claims (9)

1. A high-precision concrete video image acquisition system, characterized in that it comprises: a mounting plate (100), configured to be mounted on the upper portion of the inner wall of a feed hopper; an acquisition box (200), arranged on the mounting plate (100), the acquisition box (200) having an open end, the open end being parallel to the mounting plate (100); an acquisition mechanism (300), arranged within the acquisition box (200), the acquisition mechanism (300) comprising a rotating shaft (310), a first driving unit (320), and an acquisition unit (330), the rotating shaft (310) being arranged in the lower part of the acquisition box (200) along the horizontal direction, the acquisition unit (330) being fixed on the radial side of the rotating shaft (310), and the first driving unit (320) driving the rotating shaft (310) to rotate so that the acquisition unit (330) rotates out of the acquisition box (200) through the open end; a sealing mechanism (400), comprising a sealing door (410) and a second driving unit, the second driving unit driving the sealing door (410) to slide horizontally to close or open the open end; a positioning mechanism, comprising a first positioning sensor (510) and a second positioning sensor (520), the first positioning sensor being used to determine whether the acquisition unit (330) is in the initial position, and the second positioning sensor (520) being used to acquire the rotation angle of the acquisition unit (330); a control mechanism (600), comprising a PLC (610), the PLC (610) being arranged on the upper portion of the outer wall of the feed hopper; the PLC (610) being respectively signal connected to the first driving unit (320), the acquisition unit (330), the second driving unit, the first positioning sensor (510), and the second positioning sensor (520).

2. The high-precision concrete video image acquisition system according to claim 1, characterized in that: the first driving unit (320) comprises a speed reducer (321)

and a first driving motor (322), the rotating shaft (310) being in transmission 4600975 connection with the first driving motor (322) through the speed reducer (321); the speed reducer (321) is a worm gear reducer; a bearing seat (340) is further arranged in the horizontal direction, and the rotating shaft (310) passes through the bearing seat (340); a connecting rod (350) is arranged on the radial side of the rotating shaft (310), and the acquisition unit (330) is fixed on the radial side of the rotating shaft (310) via the connecting rod (350).

3. The high-precision concrete video image acquisition system according to claim 2, characterized in that: the acquisition box (200) comprises a bottom plate (210) configured to be disposed on the mounting plate (100), and side plates (220) surrounding the bottom plate (210), a damper is further provided between the bottom plate (210) and the mounting plate (100), and an avoidance groove (240) is formed in the lower side plate (220), the avoidance groove (240) being used to accommodate the connecting rod (350); the first positioning sensor (510) and the second positioning sensor (520) are fixedly disposed on the bottom plate (210).

4. The high-precision concrete video image acquisition system according to claim 1, characterized in that: the second driving unit comprises a second driving motor (421) and a lead screw (422), the second driving motor (421) being disposed above the acquisition box (200), an output end of the second driving motor (421) being in transmission connection with the lead screw (422), and a bracket (423) configured to be connected with the sealing door (410) being screwed on the lead screw (422); the sealing mechanism (400) further comprises a motor box (424), and the second driving unit is disposed inside the motor box (424).

5. The high-precision concrete video image acquisition system according to claim 1, characterized in that: the acquisition box (200) is provided with guide grooves (250)

at its upper and lower ends, and the upper and lower ends of the sealing door (410) 7600975 are respectively provided with universal balls (411), the universal balls (411) at the upper and lower ends of the sealing door (410) are slidably disposed in the guide grooves (250) at the upper and lower ends, respectively.

6. The high-precision concrete video image acquisition system according to claim 1, characterized in that: the control mechanism (600) further comprises a control box (620) and an angle iron (630), the PLC (610) being arranged inside the control box (620), and the control box (620) being fixed to the upper end of the outer wall of the feed hopper via the angle iron (630).

7. The high-precision concrete video image acquisition system according to claim 1, characterized in that: a fill light is further disposed along the circumferential direction of the acquisition unit (330), and the fill light is controlled by the PLC (610).

8. A method for image acquisition, employing the high-precision concrete video image acquisition system according to claim 7, characterized in that: after receiving a startup command, the PLC (610) sends an opening signal to the second driving unit to open the sealing door (410), and sends a forward rotation signal to the first driving unit (320) to drive the acquisition unit (330) to rotate; the PLC (610) acquires the angle information collected by the second positioning sensor (520), the angle information comprising the rotation angle of the acquisition unit (330); when the rotation angle of the acquisition unit (330) matches a preset angle, the PLC (610) sends a stop signal to the first driving unit (320); the PLC (610) sends a shooting signal to the acquisition unit (330) and sends a fill light signal to the fill light.

9. The image acquisition method according to claim 1, characterized in that: the acquisition method further comprises the following steps: after receiving a shutdown command, the PLC (610) sends a closing signal to the second driving unit to close the sealing door (410), and sends a reverse rotation signal 7600975 to the first driving unit (320) to drive the acquisition unit (330) to rotate;

the PLC (610) acquires the angle information collected by the second positioning sensor (520), and when the rotation angle of the acquisition unit (330) matches the preset angle, the PLC (610) sends a stop signal to the first driving unit (320);

the PLC (610) acquires the position information collected by the first positioning sensor (510), the position information including whether the acquisition unit (330) is in the initial position; when the current position of the acquisition unit (330) is in the initial position, the PLC (610) sends a power-off signal to the fill light to turn off the fill light.