Automatic cleaning apparatus for truck scale and control method using same

Abstract

An automatic cleaning apparatus for a truck scale and a control method using same. The automatic cleaning apparatus for a truck scale comprises a truck scale, a cleaning assembly, a camera (3) and a controller (4). The cleaning assembly comprises a water supply main pipe (1), the water supply main pipe (1) is provided with a plurality of water supply branch pipes (2), the plurality of water supply branch pipes (2) are each provided with a driving member, and the driving members are used for controlling nozzles of the water supply branch pipes (2) to clean the truck scale. The camera (3) is used for photographing a cleaning area of the truck scale. The controller (4) is separately in signal connection with the driving members and the camera (3), and the controller (4) is used for controlling, on the basis of a feedback signal of the camera (3), the driving members to operate, so as to complete automatic cleaning of the truck scale.

Description

An automatic cleaning device for truck scales and its control method Cross-reference of related applications

[0001] This disclosure claims priority to Chinese Patent Application No. 2024218149344, filed on December 23, 2024, entitled “An Automatic Cleaning Device for Truck Scales and Its Control Method,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of automatic cleaning technology, specifically to an automatic cleaning device for truck scales and its control method. Background Technology

[0003] Truck scales are the primary weighing equipment used for measuring bulk goods, and are widely used in the company's sales of sulfur concentrate and iron ore powder. Now, with the increasing maturity of high-precision weighing sensor technology, electronic truck scales, which offer high accuracy, good stability, and ease of operation, are being widely adopted. Due to the small particle size and high flowability of materials, heavy-duty trucks often spill some material onto the truck scale surface during weighing. This spilled material accumulates at the bottom of the truck scale through the joints between the trucks as they travel, especially near the weighing sensors. Because the material is weakly acidic and corrosive, this causes contamination, corrosion, and damage to the equipment, and also leads to weighing inaccuracies. Currently, the conventional practice is to clean manually or with water guns, which is labor-intensive, incomplete, and often results in materials accumulating for several days before cleaning, impacting both the equipment's lifespan and measurement accuracy. Summary of the Invention

[0004] In view of the problems of arbitrary operation, high labor intensity and incomplete cleaning in related technologies, this application provides an automatic cleaning device and control method for truck scales, which can realize automatic cleaning of truck scales.

[0005] To achieve the above objectives, the following technical solutions may be adopted in this application:

[0006] In a first aspect, this application provides an automatic cleaning device for truck scales, comprising:

[0007] Truck scale;

[0008] A cleaning assembly includes a main water supply pipe with multiple branch water supply pipes, each of which is equipped with a drive unit for spraying the nozzles of the branch water supply pipes toward the truck scale.

[0009] A camera is used to capture images of the cleaning area of ​​the truck scale;

[0010] A controller is connected to the drive unit and the camera unit respectively. The controller is used to control the operation of the drive unit according to the feedback signal of the camera unit to complete the automatic cleaning of the truck scale.

[0011] As described above, the automatic cleaning device for truck scales further includes a weighing platform and a weighing sensor. The weighing platform includes several steel plates, which are spliced ​​together by connecting plates to form a load-bearing platform. The weighing sensor is located below the connecting plate to weigh the vehicles on the platform.

[0012] As described above, the automatic cleaning device for truck scales further includes a platform with a height, and ramps and down ramps on opposite sides of the platform for vehicles to enter and exit the platform. A drainage ditch is also provided on the side of the platform, which is connected to a sewage treatment device and is used to collect sewage after cleaning.

[0013] The automatic cleaning device for truck scales mentioned above further includes a barrier gate, which is installed at the uphill ramp. The barrier gate includes a main unit, a main shaft rotatably mounted on the main unit, and a motor installed inside the main unit. The output end of the motor is connected to the main shaft, and a gate arm is sleeved on the main shaft.

[0014] When the truck scale is in the cleaning state, the electric motor drives the main shaft to rotate so that the gate arm is lowered, thereby preventing vehicles from entering the cleaning area of ​​the truck scale.

[0015] When the truck scale is not in a cleaning state, the electric motor drives the main shaft to rotate so that the gate arm is raised, thereby allowing vehicles to enter the truck scale for weighing.

[0016] As described above, the automatic cleaning device for truck scales further includes a pipeline booster pump installed on the main water supply pipe. A pressure gauge and a pressure transmitter are installed on both sides of the pipeline booster pump, and both the pressure gauge and the pressure transmitter are connected to the controller. The pipeline booster pump is also connected to the controller.

[0017] As described above, in the automatic cleaning device for truck scales, multiple water supply branch pipes are equipped with solenoid valves. The solenoid valves are signal-connected to the controller and are used to control the entry of clean water from the main water supply pipe into the water supply branch pipes.

[0018] As described above, the automatic cleaning device for truck scales further includes a first stepper motor and a second stepper motor. A universal loading arm is provided on the water supply branch pipe. The output shafts of the first stepper motor and the second stepper motor are both connected to the rotating part of the universal loading arm. The first stepper motor and the second stepper motor are both signal connected to the controller.

[0019] The universal loading arm is driven to rotate by the cooperation of the first stepper motor and the second stepper motor, so as to achieve the cleaning of the truck scale by the nozzle.

[0020] In the aforementioned automatic cleaning device for truck scales, the nozzle is further described as a duckbill nozzle or a circular nozzle.

[0021] Secondly, this application provides an automatic cleaning control method for truck scales, utilizing the aforementioned automatic cleaning device for truck scales, which includes the following specific steps:

[0022] Perform the first acquisition operation: acquire the pressure gauge data, and determine the current water supply pressure of the main water supply pipe based on the acquired pressure gauge data;

[0023] Perform the first judgment operation: determine whether the current water supply pressure is within the preset range. If yes, start the pipeline booster pump and perform the second acquisition operation and the second judgment operation in sequence. If no, repeat the first acquisition operation and the first judgment operation in sequence.

[0024] Perform the second acquisition operation: acquire data from the pressure transmitter, and determine the pressurized water supply pressure of the main water supply pipe based on the acquired pressure transmitter data;

[0025] Perform the second judgment operation: determine whether the pressurized water supply pressure is within the preset range. If yes, then perform the third acquisition operation and the third judgment operation in sequence. If no, then restart the pipeline pressurization pump and repeat the second acquisition operation and the second judgment operation in sequence.

[0026] Perform the third acquisition operation: acquire data from the camera and the weighing sensor, and determine the current image and current weight of the truck scale based on the acquired camera and weighing sensor data;

[0027] Perform the third judgment operation: determine whether the current image and the current weight are consistent. If they are, start the first stepper motor, the second stepper motor and the solenoid valve and perform the fourth judgment operation. If not, keep the first stepper motor, the second stepper motor and the solenoid valve in the closed state, and re-execute the third acquisition operation and the third judgment operation in sequence.

[0028] Perform the fourth judgment operation: determine whether the rotation of the first stepper motor meets the preset rotation angle. If yes, control the rotation of the second stepper motor and perform the fifth judgment operation. If no, continue to control the rotation of the first stepper motor and perform the fourth judgment operation.

[0029] Perform the fifth judgment operation: determine whether the rotation of the second stepper motor meets the preset rotation angle. If yes, restore the first and second stepper motors to their initial positions and perform the sixth judgment operation. If no, continue to control the rotation of the second stepper motor and perform the fifth judgment operation.

[0030] Perform the sixth judgment operation: determine whether the first stepper motor and the second stepper motor have returned to their initial positions. If yes, shut down the first stepper motor, the second stepper motor, and the solenoid valve; if no, continue to control the first stepper motor and the second stepper motor to rotate until they return to their initial positions and then perform the sixth judgment operation.

[0031] In the above-described automatic cleaning control method for truck scales, the specific steps of determining whether the current water supply pressure is within a preset range are as follows:

[0032] Compare the current water supply pressure with the preset first water supply pressure. If the difference between the two is between 0.1 and 0.3 MPa, it is within the preset range.

[0033] The specific steps for determining whether the pressurized water supply pressure is within the preset range are as follows:

[0034] Compare the pressurized water supply pressure with the preset second water supply pressure. If the difference between the two is between 0.3 and 0.7 MPa, it is within the preset range.

[0035] The specific steps for determining whether the current image and the current weight are consistent are as follows:

[0036] The current image is compared with the preset image, and the current weight is compared with the preset gravity value. If the images are consistent and the weight ratio is between 0.9 and 1.1, then they are considered consistent and there are no foreign objects on the truck scale.

[0037] The specific steps for determining whether the rotation of the first stepper motor meets the preset rotation angle are as follows:

[0038] The first stepper motor operates in 9° increments until it rotates to the preset 270°.

[0039] The specific steps for determining whether the rotation of the second stepper motor meets the preset rotation angle are as follows:

[0040] The second stepper motor operates in 3° steps until it rotates to the preset 36°.

[0041] The specific steps for determining whether the first and second stepper motors have returned to their initial positions are as follows:

[0042] The current positions of the first and second stepper motors are compared with their positions before startup. If the positions are the same, it is considered that the first and second stepper motors have returned to their initial positions.

[0043] Compared with related technologies, the advantages of this application are as follows:

[0044] 1. This application can achieve automatic full-coverage cleaning of truck scales, with high cleaning efficiency and thorough cleaning;

[0045] 2. This application achieves high-efficiency and low-consumption cleaning by pressurizing the water supply and setting different types of nozzles, resulting in high cleaning pressure and wide coverage.

[0046] 3. This application can monitor whether foreign objects have entered the cleaning area of ​​the truck scale through the camera. If a person or object is found to have entered, the operation can be stopped in time and resumed after the object is removed, which improves the safety of the device.

[0047] 4. The universal conversion loading arm of this application can work according to a preset program under the drive of a stepper motor, achieving cleaning without dead angles;

[0048] 5. The nozzles in this application are designed for quick disassembly, allowing for the replacement of nozzles of different specifications according to the varying cleanliness of the truck scale in different seasons, thus achieving water conservation and high efficiency. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 is a schematic diagram of the automatic cleaning device according to an embodiment of this application;

[0051] Figure 2 is a schematic diagram of the automatic cleaning control method according to an embodiment of this application;

[0052] The components include: 1. Main water supply pipe; 2. Branch water supply pipe; 3. Camera; 4. Controller; 5. Steel plate; 6. Connecting plate; 7. Weighing sensor; 8. Uphill ramp; 9. Downhill ramp; 10. Barrier gate; 11. Pipeline booster pump; 12. Pressure gauge; 13. Pressure transmitter; 14. Solenoid valve; 15. First stepper motor; 16. Second stepper motor; 17. Universal conversion loading arm; 18. Duckbill nozzle; 19. Circular nozzle. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Example

[0054] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0055] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In a first aspect, this application provides an automatic cleaning device for truck scales, which includes a truck scale, a cleaning component, a camera 3, and a controller 4. The cleaning component includes a main water supply pipe 1, which is provided with multiple branch water supply pipes 2. Each branch water supply pipe 2 is provided with a drive component, which is used to control the nozzles of the branch water supply pipes 2 to clean the truck scale. The camera 3 is used to capture images of the cleaning area of ​​the truck scale. The controller 4 is connected to the drive component and the camera 3 respectively. The controller 4 is used to control the operation of the drive component according to the feedback signal from the camera 3 to complete the automatic cleaning of the truck scale.

[0059] Specifically, referring to Figure 1, the main water supply pipe 1 is laid along the length of the truck scale. Multiple branch water supply pipes 2 are evenly distributed on the main water supply pipe 1. Each branch water supply pipe 2 is equipped with an adjustable nozzle and a drive unit that can rotate or swing the nozzle, ensuring that the cleaning water covers every corner of the truck scale. A camera 3 is installed above the truck scale, possessing high-definition imaging capabilities, and can capture real-time images of the cleaning area to monitor for any foreign objects entering the cleaning area. The controller 4, as the core control unit, is connected to the drive unit and camera 3 via wired or wireless signal transmission. The controller 4 has a pre-set cleaning algorithm that can intelligently analyze and control the drive unit's actions based on the image information fed back by the camera 3, adjusting the spray intensity, direction, and duration of the nozzles. Furthermore, if a person or object is detected entering the area, the operation can be interrupted immediately, resuming only after the object is removed, achieving precise and automatic cleaning. Additionally, the drive unit may include, but is not limited to, motors, hydraulic devices, etc.; the camera 3 may include, but is not limited to, infrared cameras, high-definition cameras, etc.; and the controller 4 may include, but is not limited to, PLCs (Programmable Logic Controllers) and PACs (Programmable Automation Controllers).

[0060] As an optional implementation, in some embodiments, the truck scale includes a weighing platform and a load cell 7. The weighing platform includes several steel plates 3, which are joined together by connecting plates 4 to form a load-bearing platform. The load cell 7 is disposed below the connecting plates 4 to weigh vehicles on the platform. Furthermore, the platform has a height, and ramps 8 and 9 are respectively provided on opposite sides of the platform for vehicles to enter and exit the platform. A drainage ditch (not shown) is also provided on the side of the platform, which is connected to a sewage treatment device (not shown) for recycling wastewater after cleaning. Furthermore, it also includes a barrier gate 10, which is installed at the uphill ramp 8. The barrier gate includes a main unit, a main shaft rotatably mounted on the main unit, and a motor installed inside the main unit. The output end of the motor is connected to the main shaft, and a gate arm is sleeved on the main shaft. When the truck scale is in the cleaning state, the motor drives the main shaft to rotate so that the gate arm is lowered, thereby preventing vehicles from entering the cleaning area of ​​the truck scale. When the truck scale is not in the cleaning state, the motor drives the main shaft to rotate so that the gate arm is raised, thereby allowing vehicles to enter the truck scale for weighing.

[0061] Specifically, the weighbridge platform has a rigid, integral platform composed of multiple steel plates 3 and connecting plates 4. Weighing sensors 7 are installed beneath the connecting plates to accurately measure the weight of vehicles on the platform. Furthermore, the platform is designed with a certain height, above the ground, which improves the stability of the weighing process and facilitates the drainage of wastewater generated after cleaning into a ditch for recycling. The barrier gate 10, controlled by a motor within its main unit, raises and lowers the gate arm, preventing other vehicles from entering the cleaning area during the weighbridge cleaning process and enhancing the safety of the device.

[0062] As an optional implementation, in some embodiments, a pipeline booster pump 11 is installed on the main water supply pipe 1. A pressure gauge 12 and a pressure transmitter 13 are respectively installed on both sides of the pipeline booster pump 11. Both the pressure gauge 12 and the pressure transmitter 13 are connected to the controller 4, and the pipeline booster pump 11 is also connected to the controller 4. The pressure gauge 12 and the pressure transmitter 13 can provide feedback on the pressure of the clean water in the main water supply pipe 1, and, based on actual conditions, activate the pipeline booster pump 11 to pressurize the clean water, ensuring that the sprayed clean water has sufficient pressure, thereby achieving water conservation and efficient cleaning.

[0063] As an optional implementation, in some embodiments, multiple water supply branch pipes 2 are each equipped with a solenoid valve 14. The solenoid valve 14 is signal-connected to the controller 4 and is used to control the flow of clean water from the main water supply pipe 1 into the water supply branch pipes 14. The solenoid valve 14 has a fast response, allowing for rapid opening and closing of the valve. Furthermore, in conjunction with the controller 4, it enables automated control.

[0064] As an optional implementation, in some embodiments, the driving components include a first stepper motor 15 and a second stepper motor 16. A universal loading arm 17 is installed on the water supply branch pipe 2. The output shafts of both the first stepper motor 15 and the second stepper motor 16 are connected to the rotating part of the universal loading arm 17. Both the first stepper motor 15 and the second stepper motor 16 are signal-connected to the controller 4. The universal loading arm 17 is driven to rotate through the cooperation of the first stepper motor 15 and the second stepper motor 16, thereby achieving the cleaning of the truck scale by the spray nozzles. This automatic cleaning device uses the cooperation of dual stepper motors and the universal loading arm 17 to rotate the spray nozzles. The dual stepper motors have high torque output and good load resistance, maintaining stability when facing external interference or load changes. This stability, combined with the universal loading arm 17, prevents it from deviating from its predetermined position due to vibration or external forces during rotation. Simultaneously, the dual stepper motors can achieve bidirectional rotation, and the rotation angle can be precisely controlled. This flexibility, combined with the universal loading arm 17, allows for easy rotation, ensuring that cleaning water is sprayed to every corner of the truck scale.

[0065] As an optional implementation, in some embodiments, the nozzles are either duckbill nozzles 18 or circular nozzles 19. Both types of nozzles are water-saving and efficient. Furthermore, the duckbill nozzle 18 has a wider spray range, effectively covering large cleaning areas, while the circular nozzle 19 provides more uniform spraying, achieving 360-degree all-around spraying. In actual use, adjustments can be made according to needs to ensure the truck scale is thoroughly cleaned.

[0066] Secondly, this application provides an automatic cleaning control method for truck scales, utilizing the aforementioned automatic cleaning device for truck scales, which includes the following specific steps:

[0067] Step 110: Perform the first acquisition operation: acquire the pressure gauge data and determine the current water supply pressure of the main water supply pipe based on the acquired pressure gauge data.

[0068] In this step, a pressure gauge is an instrument that measures pressures greater than, equal to, or less than atmospheric pressure, based on atmospheric pressure. The pressure gauge data can be obtained by directly observing and recording the readings on the gauge's pointer or by using a testing instrument to read the pointer's readings. These readings reflect the current water supply pressure, thus determining the current water supply pressure within the main water supply pipe.

[0069] Step 120: Perform the first judgment operation: determine whether the current water supply pressure is within the preset range. If yes, start the pipeline booster pump and perform the second acquisition operation and the second judgment operation in sequence. If no, repeat the first acquisition operation and the first judgment operation in sequence.

[0070] In this step, the relationship between the current water supply pressure and the preset pressure is determined. This determination operation can yield two results: one is that it is within the preset range, in which case the pipeline booster pump is started and steps 130 and 140 are executed sequentially; the other is that it is not within the preset range, in which case steps 110 and 120 are executed again sequentially.

[0071] Step 130: Perform the second acquisition operation: acquire the data from the pressure transmitter, and determine the pressurized water supply pressure of the main water supply pipe based on the acquired pressure transmitter data.

[0072] In this step, a pressure transmitter is an instrument that receives pressure variables, converts them through sensing, and then converts the pressure change into a standard output signal according to a certain ratio. The data from the pressure transmitter can be transmitted to the controller via wired or wireless transmission for reading. The read values ​​reflect the magnitude of the pressurized water supply pressure, thereby determining the pressurized water supply pressure within the main water supply pipe.

[0073] Step 140: Perform the second judgment operation: determine whether the pressurized water supply pressure is within the preset range. If yes, then perform the third acquisition operation and the third judgment operation in sequence. If no, then restart the pipeline pressurization pump and repeat the second acquisition operation and the second judgment operation in sequence.

[0074] In this step, the relationship between the pressurized water supply pressure and the preset pressure is determined. This determination operation can obtain two results: one is that it is within the preset range, in which case steps 150 and 160 are executed sequentially; the other is that it is not within the preset range, in which case the pipeline pressurization pump is restarted and steps 130 and 140 are executed.

[0075] Step 150: Perform the third acquisition operation: acquire data from the camera and the weighing sensor, and determine the current image and current weight of the truck scale based on the acquired camera and weighing sensor data.

[0076] In this step, the camera typically refers to a camera module and its related components, which work together to capture and convert light into a digital image. Data from the camera can be transmitted to the controller via wired or wireless transmission for reading. The read image reflects the current image information on the truck scale, thus determining the current image of the truck scale. A load cell is a device that converts a mass signal into a measurable electrical signal output. Data from the load cell can be acquired either by directly reading it from the controller or by using specialized software tools, such as FUTEK USB Solutions or HBM eDrive Testing. The read data reflects the current weight information on the truck scale, thus determining the current weight of the truck scale.

[0077] Step 160: Perform the third judgment operation: determine whether the current image and the current weight are consistent. If yes, start the first stepper motor, the second stepper motor and the solenoid valve and perform the fourth judgment operation. If no, keep the first stepper motor, the second stepper motor and the solenoid valve in the closed state, and re-execute the third acquisition operation and the third judgment operation in sequence.

[0078] In this step, it is determined whether the current image is consistent with the preset image, and the relationship between the current weight and the preset gravity value is determined. This determination operation can obtain two results: one is that the image and the weight are consistent, then step 170 is executed; the other is that the image or the weight is inconsistent, then the first stepper motor, the second stepper motor and the solenoid valve are kept in the closed state, and steps 150 and 160 are executed again in sequence.

[0079] Step 170: Perform the fourth judgment operation: Determine whether the rotation of the first stepper motor meets the preset rotation angle. If yes, control the rotation of the second stepper motor and perform the fifth judgment operation. If no, continue to control the rotation of the first stepper motor and perform the fourth judgment operation.

[0080] In this step, the truck scale is in a cleaning state. The rotation angle of the first stepper motor is measured. For example, an encoder measurement method or a micro-stepping measurement method can be used. The measured angle is compared with a preset angle to determine whether the rotation of the first stepper motor meets the requirements. This determination operation can obtain two results: one, the rotation angle of the first stepper motor meets the preset rotation angle, then step 180 is executed; the other, the rotation angle of the first stepper motor does not meet the preset rotation angle, then the first stepper motor is controlled to rotate and step 170 is executed.

[0081] Step 180: Perform the fifth judgment operation: Determine whether the rotation of the second stepper motor meets the preset rotation angle. If yes, restore the first and second stepper motors to their initial positions and perform the sixth judgment operation. If no, continue to control the rotation of the second stepper motor and perform the fifth judgment operation.

[0082] In this step, the rotation angle of the second stepper motor is measured in the same way as the rotation angle of the first stepper motor, and will not be repeated here. The measured angle is compared with the preset angle to determine whether the rotation of the second stepper motor meets the requirements. This determination operation can yield two results: one, the rotation angle of the second stepper motor meets the preset rotation angle, then step 190 is executed; the other, the rotation angle of the second stepper motor does not meet the preset rotation angle, then the second stepper motor is controlled to rotate and step 180 is executed.

[0083] Step 190: Perform the sixth judgment operation: Determine whether the first stepper motor and the second stepper motor have returned to their initial positions. If yes, close the first stepper motor, the second stepper motor, and the solenoid valve; if no, continue to control the first stepper motor and the second stepper motor to rotate until they return to their initial positions and then perform the sixth judgment operation.

[0084] In this step, the truck scale is in the cleaned state. The positions of the first and second stepper motors are measured. The specific measurement method can be the method described above. The measured position is compared with the initial position to determine whether the first and second stepper motors have returned to their initial positions. This determination operation can obtain two results: one, the first and second stepper motors have returned to their initial positions, then the first and second stepper motors and the solenoid valve are closed; the other, the first and second stepper motors have not returned to their initial positions, then the first and second stepper motors continue to rotate until they return to their initial positions and step 190 is executed.

[0085] As an optional implementation, in some embodiments, determining whether the current water supply pressure is within a preset range specifically involves comparing the current water supply pressure with a preset first water supply pressure. If the difference between the two is between 0.1 and 0.3 MPa, then it falls within the preset range.

[0086] The specific method for determining whether the pressurized water supply pressure is within the preset range is as follows: compare the pressurized water supply pressure with the preset second water supply pressure. If the difference between the two is between 0.3 and 0.7 MPa, then it is within the preset range.

[0087] The specific method for determining whether the current image and the current weight are consistent is as follows: compare the current image with the preset image, and compare the current weight with the preset gravity value. If the images are consistent and the ratio of their weights is between 0.9 and 1.1, then they are considered consistent and there are no foreign objects on the truck scale.

[0088] The specific method for determining whether the rotation of the first stepper motor meets the preset rotation angle is as follows: the first stepper motor performs stepping work in 9° increments until the rotation reaches the preset 270°.

[0089] The specific method for determining whether the rotation of the second stepper motor meets the preset rotation angle is as follows: the second stepper motor operates in 3° steps until the rotation reaches the preset 36°.

[0090] The specific steps to determine whether the first and second stepper motors have returned to their initial positions are as follows: compare the current positions of the first and second stepper motors with their positions before startup. If the positions are consistent, it is considered that the first and second stepper motors have returned to their initial positions.

[0091] Specifically, the aforementioned preset range, preset angle, and consistency of image and weight can all be adjusted appropriately according to actual conditions to meet the requirements of safe automatic cleaning of truck scales.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] The above embodiments are merely illustrative of the technical concept and features of this application, intended to enable those skilled in the art to understand the content of this application and implement it accordingly, and should not be construed as limiting the scope of protection of this application. All equivalent changes or modifications made based on the substance of the content of this application should be covered within the scope of protection of this application.

Claims

1. An automatic cleaning device for truck scales, characterized in that, include: Truck scale; The cleaning assembly includes a main water supply pipe with multiple branch water supply pipes, each of which is equipped with a drive unit for controlling the nozzles of the branch water supply pipes to clean the truck scale. A camera for capturing images of the cleaning area of ​​the truck scale; A controller is connected to the drive unit and the camera unit respectively. The controller is used to control the operation of the drive unit according to the feedback signal of the camera unit to complete the automatic cleaning of the truck scale.

2. The automatic cleaning device for truck scales according to claim 1, characterized in that, The truck scale includes a weighing body and a weighing sensor. The weighing body includes several steel plates, which are spliced ​​together by connecting plates to form a load-bearing platform. The weighing sensor is located below the connecting plate to weigh vehicles on the platform.

3. The automatic cleaning device for truck scales according to claim 2, characterized in that, The platform has a height, and ramps and down ramps are provided on opposite sides of the platform to allow vehicles to enter and exit the platform. A drainage ditch is also provided on the side of the platform, which is connected to a sewage treatment device and is used to collect sewage after cleaning.

4. The automatic cleaning device for truck scales according to claim 3, characterized in that, It also includes a barrier gate, which is installed at the uphill ramp. The barrier gate includes a main unit box, a main shaft rotatably installed on the main unit box, and a motor installed inside the main unit box. The output end of the motor is connected to the main shaft, and a gate arm is sleeved on the main shaft. When the truck scale is in the cleaning state, the electric motor drives the main shaft to rotate so that the gate arm is lowered, thereby preventing vehicles from entering the cleaning area of ​​the truck scale. When the truck scale is not in a cleaning state, the electric motor drives the main shaft to rotate so that the gate arm is raised, thereby allowing vehicles to enter the truck scale for weighing.

5. The automatic cleaning device for truck scales according to claim 1, characterized in that, A pipeline booster pump is installed on the main water supply pipe. A pressure gauge and a pressure transmitter are respectively installed on both sides of the pipeline booster pump. The pressure gauge and the pressure transmitter are both connected to the controller. The pipeline booster pump is also connected to the controller.

6. The automatic cleaning device for truck scales according to claim 1, characterized in that, Each of the multiple water supply branch pipes is equipped with a solenoid valve, which is signal-connected to the controller. The solenoid valve is used to control the entry of clean water from the main water supply pipe into the branch pipe.

7. The automatic cleaning device for truck scales according to claim 1, characterized in that, The driving component includes a first stepper motor and a second stepper motor. A universal loading arm is provided on the water supply branch pipe. The output shafts of the first stepper motor and the second stepper motor are both connected to the rotating part of the universal loading arm. The first stepper motor and the second stepper motor are both signal connected to the controller. The universal loading arm is driven to rotate by the cooperation of the first stepper motor and the second stepper motor, so as to achieve the cleaning of the truck scale by the nozzle.

8. The automatic cleaning device for truck scales according to claim 1, characterized in that, The nozzle can be a duckbill nozzle or a round nozzle.

9. An automatic cleaning control method for truck scales, employing the automatic cleaning device for truck scales as described in any one of claims 1 to 8, characterized in that, The specific steps include: Perform the first acquisition operation: acquire the pressure gauge data, and determine the current water supply pressure of the main water supply pipe based on the acquired pressure gauge data; Perform the first judgment operation: determine whether the current water supply pressure is within the preset range. If yes, start the pipeline booster pump and perform the second acquisition operation and the second judgment operation in sequence. If no, repeat the first acquisition operation and the first judgment operation in sequence. Perform the second acquisition operation: acquire data from the pressure transmitter, and determine the pressurized water supply pressure of the main water supply pipe based on the acquired pressure transmitter data; Perform the second judgment operation: determine whether the pressurized water supply pressure is within the preset range. If yes, then perform the third acquisition operation and the third judgment operation in sequence. If no, then restart the pipeline pressurization pump and repeat the second acquisition operation and the second judgment operation in sequence. Perform the third acquisition operation: acquire data from the camera and the weighing sensor, and determine the current image and current weight of the truck scale based on the acquired camera and weighing sensor data; Perform the third judgment operation: determine whether the current image and the current weight are consistent. If they are, start the first stepper motor, the second stepper motor and the solenoid valve and perform the fourth judgment operation. If not, keep the first stepper motor, the second stepper motor and the solenoid valve in the closed state, and re-execute the third acquisition operation and the third judgment operation in sequence. Perform the fourth judgment operation: determine whether the rotation of the first stepper motor meets the preset rotation angle. If yes, control the rotation of the second stepper motor and perform the fifth judgment operation. If no, continue to control the rotation of the first stepper motor and perform the fourth judgment operation. Perform the fifth judgment operation: determine whether the rotation of the second stepper motor meets the preset rotation angle. If yes, restore the first and second stepper motors to their initial positions and perform the sixth judgment operation. If no, continue to control the rotation of the second stepper motor and perform the fifth judgment operation. Perform the sixth judgment operation: determine whether the first stepper motor and the second stepper motor have returned to their initial positions. If yes, shut down the first stepper motor, the second stepper motor, and the solenoid valve; if no, continue to control the first stepper motor and the second stepper motor to rotate until they return to their initial positions and then perform the sixth judgment operation.

10. The automatic cleaning control method for truck scales according to claim 9, characterized in that, The specific steps for determining whether the current water supply pressure is within the preset range are as follows: Compare the current water supply pressure with the preset first water supply pressure. If the difference between the two is between 0.1 and 0.3 MPa, it is within the preset range. The specific steps for determining whether the pressurized water supply pressure is within the preset range are as follows: Compare the pressurized water supply pressure with the preset second water supply pressure. If the difference between the two is between 0.3 and 0.7 MPa, it is within the preset range. The specific steps for determining whether the current image and the current weight are consistent are as follows: The current image is compared with the preset image, and the current weight is compared with the preset gravity value. If the images are consistent and the weight ratio is between 0.9 and 1.1, then they are considered consistent and there are no foreign objects on the truck scale. The specific steps for determining whether the rotation of the first stepper motor meets the preset rotation angle are as follows: The first stepper motor operates in 9° increments until it rotates to the preset 270°. The specific steps for determining whether the rotation of the second stepper motor meets the preset rotation angle are as follows: The second stepper motor operates in 3° steps until it rotates to the preset 36°. The specific steps for determining whether the first and second stepper motors have returned to their initial positions are as follows: The current positions of the first and second stepper motors are compared with their positions before startup. If the positions are the same, it is considered that the first and second stepper motors have returned to their initial positions.

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