阅读说明：本技术 一种在线液压同步升降称重方法、系统及其存储介质 (On-line hydraulic synchronous lifting weighing method, system and storage medium thereof ) 是由 周景琪 于 2021-08-09 设计创作，主要内容包括：本发明涉及一种在线液压同步升降称重方法、系统及其存储介质,所述方法包括：判断待测物是否进入拍摄区域；当待测物进入拍摄区域时,获取待测物的采集图像；根据采集图像,计算采集图像中待测物的测量体积；获取待测物对应的密度值,根据密度值和测量体积计算得到待测物的预估重量值；获取待测物的测量重量值；将预估重量值与测量重量值进行比较,计算预估重量值与测量重量值之间的重量差值,计算重量差值占测量重量值的重量差值百分比；判断重量差值百分比是否高于百分比阈值,若是,则判断测量重量值异常。可在钢坯重量称重严重不准确时及时发现异常。(The invention relates to an on-line hydraulic synchronous lifting weighing method, a system and a storage medium thereof, wherein the method comprises the following steps: judging whether the object to be detected enters a shooting area or not; when an object to be detected enters a shooting area, acquiring an acquired image of the object to be detected; calculating the measurement volume of the object to be measured in the acquired image according to the acquired image; acquiring a density value corresponding to the object to be measured, and calculating according to the density value and the measurement volume to obtain an estimated weight value of the object to be measured; obtaining a measured weight value of an object to be measured; comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value accounting for the weight difference value percentage of the measured weight value; and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal. The abnormity can be timely found when the steel billet weight weighing is serious and inaccurate.)

1. An on-line hydraulic synchronous lifting weighing method is characterized by comprising the following steps:

judging whether the object to be detected enters a shooting area or not;

when an object to be detected enters a shooting area, acquiring an acquired image of the object to be detected;

calculating the measurement volume of the object to be measured in the acquired image according to the acquired image;

acquiring a density value corresponding to the object to be measured, and calculating according to the density value and the measurement volume to obtain an estimated weight value of the object to be measured;

obtaining a measured weight value of an object to be measured;

comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value accounting for the weight difference value percentage of the measured weight value;

and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

2. The method of claim 1, wherein the method for determining whether the object enters the shooting area comprises:

and judging whether the hydraulic elevator is in a rising state, if so, enabling the object to be detected to enter a shooting area.

3. The on-line hydraulic synchronous lifting weighing method according to claim 1, wherein the specific method for calculating the measurement volume of the object to be measured in the acquired image according to the acquired image is as follows:

acquiring the acquisition side area and the acquisition length of the object to be measured in the acquired image, calculating to obtain the measurement side area and the measurement length according to the preset acquisition side area and the measurement side area and the conversion ratio between the acquisition length and the measurement length, and calculating to obtain the measurement volume of the object to be measured.

4. The on-line hydraulic synchronous lifting weighing method of claim 1, wherein the density value corresponding to the object to be measured is stored in a database, and the density value is output according to a user instruction.

5. An on-line hydraulic synchronous lifting weighing system, characterized in that the system comprises:

the shooting area judging module is used for judging whether the object to be detected enters the shooting area or not;

the image acquisition module is used for acquiring an acquired image of the object to be detected when the object to be detected enters the shooting area;

the measurement volume calculation module is used for calculating the measurement volume of the object to be measured in the acquired image according to the acquired image;

the estimated weight value calculation module is used for acquiring a density value corresponding to the object to be measured and calculating the estimated weight value of the object to be measured according to the density value and the measurement volume;

the measurement weight value acquisition module is used for acquiring the measurement weight value of the object to be measured;

the error judgment module is used for comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value percentage of the weight difference value in the measured weight value; and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

6. The on-line hydraulic synchronous lifting weighing system according to claim 5, further comprising a lifting device and a weighing device, wherein the lifting device is used for lifting the roller way, the weighing device is arranged at the bottom of the lifting device and used for weighing an object to be measured on the roller way to obtain a measured weight value, and when the lifting device is in a rising state, the shooting area judgment module judges that the object to be measured enters the shooting area.

7. The on-line hydraulic synchronous lifting weighing system of claim 5, wherein the image acquisition module comprises:

the first image acquisition submodule is arranged right above the roller way connected with the lifting device and used for acquiring a first acquisition image of the object to be detected;

and the second image acquisition submodule is arranged on one side of the roller way connected with the lifting device and is used for acquiring a second acquisition image of the object to be detected.

8. The on-line hydraulic synchronous lifting weighing system of claim 5, wherein the measurement volume calculation module comprises:

the length acquisition module is used for acquiring acquisition length from the first acquisition image or the second acquisition image;

and the side area acquisition module is used for acquiring the side area from the first acquisition image or the second acquisition image.

9. The on-line hydraulic synchronous lifting weighing system of claim 5, further comprising a density value acquisition module for outputting a density value according to a user instruction.

10. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 4.

Technical Field

The invention relates to the technical field of billet weighing, in particular to an online hydraulic synchronous lifting weighing method and system.

Background

Referring to fig. 1, thick steel billets coming out of a rolling mill are conveyed through a roller way, the steel billets need to be weighed in the conveying process, an online synchronous hydraulic weighing system is equipment for weighing the steel billets, when the steel billets are conveyed to the upper portion of a roller way scale through the roller way, the steel billets are stopped, and then the steel billets are integrally supported by a synchronous hydraulic lifter, so that the weight of the steel billets is completely transmitted to a weighing sensor and weighed once through a weighing instrument. And (5) placing the steel billet after weighing. And the billet steel is continuously conveyed to the destination by the roller way. The billet conveyed by each roller way is weighed in this way.

The above prior art solutions have the following drawbacks: since the synchronous hydraulic elevator may have a condition of asynchronous lifting, which causes the billet to tilt, resulting in accurate weighing, verification of the obtained weight data of the synchronous hydraulic weighing system is required.

Disclosure of Invention

In order to verify whether the weight obtained by weighing the steel billet is accurate, the application provides an online hydraulic synchronous lifting weighing method, an online hydraulic synchronous lifting weighing system and a storage medium of the online hydraulic synchronous lifting weighing system.

In a first aspect, the application provides an online hydraulic synchronous lifting weighing method, which adopts the following technical scheme:

an on-line hydraulic synchronous lifting weighing method comprises the following steps: judging whether the object to be detected enters a shooting area or not; when an object to be detected enters a shooting area, acquiring an acquired image of the object to be detected; calculating the measurement volume of the object to be measured in the acquired image according to the acquired image; acquiring a density value corresponding to the object to be measured, and calculating according to the density value and the measurement volume to obtain an estimated weight value of the object to be measured; obtaining a measured weight value of an object to be measured; comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value accounting for the weight difference value percentage of the measured weight value; and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

By adopting the technical scheme, the estimated weight value and the measured weight value of the object to be measured are compared, and when the percentage of the calculated weight difference value is higher than the percentage threshold value, the difference between the estimated weight value and the measured weight value is large, so that the problems of inclination of the object to be measured, abnormality of a weighing device and the like caused by asynchronization of the hydraulic elevator can be solved.

Optionally, the method for determining whether the object to be measured enters the shooting area comprises: judging whether the hydraulic elevator is in a rising state, if so, entering the shooting area by the object to be detected

By adopting the technical scheme, when the hydraulic elevator is in the ascending state, the object to be measured is lifted, the object to be measured is static in the horizontal direction at the moment, and the definition of the object to be measured in the image can be improved by photographing the object to be measured.

Optionally, the specific method for calculating the measurement volume of the object to be measured in the acquired image according to the acquired image is as follows: acquiring the acquisition side area and the acquisition length of the object to be measured in the acquired image, calculating to obtain the measurement side area and the measurement length according to the preset acquisition side area and the measurement side area and the conversion ratio between the acquisition length and the measurement length, and calculating to obtain the measurement volume of the object to be measured.

By adopting the technical scheme, the conversion proportion can convert the acquisition length and the acquisition side area in the image into the actual measurement length and the actual measurement side area of the object to be measured, so that the measurement volume of the object to be measured is obtained.

Optionally, the density value corresponding to the object to be detected is stored in a database, and the density value is output according to a user instruction.

By adopting the technical scheme, the to-be-measured objects made of different materials have different density values, so that the corresponding density values are required to be given according to the materials of the to-be-measured objects, and the estimated weight value of the to-be-measured objects is more accurately calculated.

In a second aspect, the present application provides an online hydraulic synchronous lifting weighing system, which adopts the following technical scheme:

an on-line hydraulic synchronous lift weighing system, the system comprising: the shooting area judging module is used for judging whether the object to be detected enters the shooting area or not; the image acquisition module is used for acquiring an acquired image of the object to be detected when the object to be detected enters the shooting area; the measurement volume calculation module is used for calculating the measurement volume of the object to be measured in the acquired image according to the acquired image; the estimated weight value calculation module is used for acquiring a density value corresponding to the object to be measured and calculating the estimated weight value of the object to be measured according to the density value and the measurement volume; the measurement weight value acquisition module is used for acquiring the measurement weight value of the object to be measured; the error judgment module is used for comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value percentage of the weight difference value in the measured weight value; and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

By adopting the technical scheme, after the object to be measured enters the shooting area, the measurement volume is obtained, the estimated weight value is calculated and compared with the measurement weight value obtained by weighing the object to be measured, and when the percentage of the weight difference value is higher than the percentage threshold value, the weight value is judged to be abnormal.

Optionally, the system further comprises a lifting device and a weighing device, the lifting device is used for lifting the roller way, the weighing device is arranged at the bottom of the lifting device and used for weighing the object to be measured on the roller way to obtain a measured weight value, and when the lifting device is in a rising state, the shooting area judgment module judges that the object to be measured enters the shooting area.

By adopting the technical scheme, after the roller way is lifted by the lifting device, the object to be measured on the roller way is separated from the roller way except for the roller way supporting the object to be measured, so that the roller way connected with the lifting device bears all the weight of the object to be measured, the weighing device weighs the weight of the object to be measured, and the measured weight value is obtained.

Optionally, the image acquisition module includes: the first image acquisition submodule is arranged right above the roller way connected with the lifting device and used for acquiring a first acquisition image of the object to be detected; and the second image acquisition submodule is arranged on one side of the roller way connected with the lifting device and is used for acquiring a second acquisition image of the object to be detected.

By adopting the technical scheme, the first collected image and the second collected image comprise the collection length and the collection side area of the object to be detected.

Optionally, the measurement volume calculation module includes: the length acquisition module is used for acquiring acquisition length from the first acquisition image or the second acquisition image; and the side area acquisition module is used for acquiring the side area from the first acquisition image or the second acquisition image.

By adopting the technical scheme, the acquisition length and the acquisition side area in the first acquisition image and the second acquisition image are acquired.

Optionally, the system further includes a density value obtaining module, configured to output the density value according to a user instruction.

By adopting the technical scheme, the to-be-measured objects made of different materials have different density values, so that the corresponding density values are required to be given according to the materials of the to-be-measured objects, and the estimated weight value of the to-be-measured objects is more accurately calculated.

In a third aspect, the present application provides a computer readable storage medium storing a computer program capable of being loaded by a processor and executing the above-mentioned online hydraulic synchronous lifting weighing method.

In summary, the present application includes at least one of the following beneficial technical effects:

calculating the estimated weight value, comparing the estimated weight value with the measured weight value, calculating to obtain a weight difference value, calculating the weight difference value percentage of the weight difference value in the measured weight value, and judging whether the weight difference value percentage is higher than a percentage threshold value, thereby judging whether the measured weight value is abnormal.

Drawings

FIG. 1 is a schematic diagram of the operation of the background art of the embodiments of the present application;

FIG. 2 is a flow chart of an on-line hydraulic synchronous lifting weighing method according to the embodiment of the application;

FIG. 3 is a block diagram of an online hydraulic synchronous lifting weighing system according to an embodiment of the present application.

Detailed Description

The present invention is described in further detail below with reference to figures 1-3.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Referring to fig. 1, thick steel billets coming out of a rolling mill are conveyed through a roller way, the steel billets need to be weighed in the conveying process, an online synchronous hydraulic weighing system is equipment for weighing the steel billets, when the steel billets are conveyed to the upper portion of a roller way scale through the roller way, the steel billets are stopped, and then the steel billets are integrally supported by a synchronous hydraulic lifter, so that the weight of the steel billets is completely transmitted to a weighing sensor and weighed once through a weighing instrument. And (5) placing the steel billet after weighing. And the billet steel is continuously conveyed to the destination by the roller way. The billet conveyed by each roller way is weighed in this way.

A steel billet is simultaneously jacked up or descended by 4 hydraulic oil cylinders, and the 4 hydraulic oil cylinders must synchronously act to ensure that the steel billet is stably supported and accurately weighed. The lifting of the 4 hydraulic oil cylinders is realized by a special mechanical oil cylinder synchronous lifter, and the problem of synchronous lifting of the 4 oil cylinders under the condition of large stress difference is solved.

The embodiment of the invention provides an online hydraulic synchronous lifting weighing method, and with reference to fig. 2, the method comprises the following steps:

s101: and judging whether the object to be detected enters the shooting area or not.

In the embodiment of the present application, the shooting area refers to a position where the object to be measured is located when the image of the object to be measured is shot. The object to be measured is a billet in the present application. The method for judging whether the object to be detected enters the shooting area comprises the following steps: and judging whether the hydraulic elevator is in a rising state, if so, enabling the object to be detected to enter a shooting area. The rising state of the hydraulic lifter is: and a hydraulic rod of the hydraulic elevator lifts the roller way to the highest point in the working process. A travel switch is arranged at the rising state position of the hydraulic rod, when the hydraulic lifter is in a rising state, the travel switch is triggered, and the travel switch sends a signal, so that the hydraulic lifter is prompted to be in the rising state.

S102: and when the object to be detected enters the shooting area, acquiring a collected image of the object to be detected.

S103: and calculating the measurement volume of the object to be measured in the acquired image according to the acquired image.

In the embodiment of the present application, the manner of acquiring the collected image of the object to be measured is to shoot the object to be measured by using a camera. In order to calculate the measurement volume of the object, the side area and length of the object need to be photographed by a camera. Therefore, the object to be measured needs to be shot to obtain a collected image, the collected image is used for collecting the side area of the object to be measured, and the length of the object to be measured is the collecting length. In order to avoid calculation errors caused by an included angle between the camera and the object to be measured, the shooting angle of the camera needs to be perpendicular to the object to be measured. In the embodiment of the application, two cameras are required to respectively and directly acquire images of two sides of an object to be detected, and the acquired images are respectively a first acquired image and a second acquired image. Because the steel billet is generally cuboid, the camera is arranged right above the object to be measured and at one side of the horizontal moving direction of the object to be measured when the hydraulic lifting mechanism is in a lifting state, and thus, the length, width and height of the object to be measured can be acquired. The acquisition side area can be calculated through any two items of data of the length, the width and the height of the object to be detected, and the remaining data is the acquisition length. And converting the size of the object to be measured in the image according to a preset conversion ratio to obtain an actual size, wherein the conversion ratio is obtained through an actual test. In the actual test, the actual size of the substitute with the size similar to that of the billet used in the test is measured in advance, then the acquisition size of the acquired image of the substitute is obtained by a camera, and the ratio of the actual size to the acquisition size is calculated to be the conversion ratio. The acquisition side area can be converted into the acquisition side area and the acquisition length can be converted into the measurement length according to the conversion proportion, and the product of the measurement side area and the measurement length is the measurement volume.

S104: and obtaining a density value corresponding to the object to be measured, and calculating according to the density value and the measured volume to obtain an estimated weight value of the object to be measured.

In the embodiment of the present application, the density value corresponding to the object to be measured is stored in the database, and in the database, different materials have different densities. The user only needs to select the material of the steel billet on the operation interface, and the density value of the corresponding steel billet can be output. The system obtains the density value according to the instruction of the user. The estimated weight value of the object to be measured is obtained by calculating the product of the density value and the measured volume.

S105: and acquiring the measured weight value of the object to be measured.

In the embodiment of the application, referring to fig. 1, the measured weight value is the sum of weight values measured by a plurality of weighing sensors at the bottom of the hydraulic elevator.

S106: comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value accounting for the weight difference value percentage of the measured weight value;

s107: and judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

In the embodiment of the present application, the estimated weight value may be higher than the measured weight value or lower than the measured weight value. The weight difference is therefore an absolute value. The percentage threshold is set empirically by the user. The abnormal weight measurement may be caused by different lifting heights of the hydraulic lifting mechanisms, such as inaccurate inclined weighing of the steel billet, failure or abnormality of at least one weighing sensor among the weighing sensors, etc.

The application also provides an online hydraulic pressure synchronous lifting weighing system, refer to fig. 3, this system includes:

and the shooting area judging module is used for judging whether the object to be detected enters the shooting area.

And the image acquisition module is used for acquiring an acquired image of the object to be detected when the object to be detected enters the shooting area. The image acquisition module includes: and the first image acquisition submodule is arranged right above the roller way connected with the lifting device and is used for acquiring a first acquisition image of the object to be detected. And the second image acquisition submodule is arranged on one side of the roller way connected with the lifting device and is used for acquiring a second acquisition image of the object to be detected.

And the measurement volume calculation module is used for calculating the measurement volume of the object to be measured in the acquired image according to the acquired image.

And the estimated weight value calculation module is used for acquiring the density value corresponding to the object to be measured and calculating the estimated weight value of the object to be measured according to the density value and the measurement volume.

And the measurement weight value acquisition module is used for acquiring the measurement weight value of the object to be measured.

And the error judgment module is used for comparing the estimated weight value with the measured weight value, calculating a weight difference value between the estimated weight value and the measured weight value, and calculating the weight difference value percentage of the weight difference value in the measured weight value. And judging whether the weight difference value percentage is higher than a percentage threshold value, if so, judging that the measured weight value is abnormal.

The lifting device is used for lifting the roller way, the weighing device is arranged at the bottom of the lifting device and used for weighing an object to be measured on the roller way to obtain a measured weight value, and when the lifting device is in a rising state, the shooting area judgment module judges that the object to be measured enters a shooting area.

And the length acquisition module is used for acquiring the acquisition length from the first acquisition image or the second acquisition image.

And the side area acquisition module is used for acquiring the acquisition side area from the first acquisition image or the second acquisition image.

And the density value acquisition module is used for outputting the density value according to a user instruction.

For specific limitations of the online hydraulic synchronous lifting weighing system, reference may be made to the above limitations of the online hydraulic synchronous lifting weighing method, and details are not repeated here.

The application also provides a computer readable storage medium, which stores a computer program capable of being loaded by a processor and executing the online hydraulic synchronous lifting weighing method.

The computer-readable storage medium includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.