Train goods weighing system and method based on PLC and video identification and positioning

Abstract

The invention provides a train goods weighing system and method based on a PLC and video identification positioning, the system comprises a PLC module, a flatcar module, a height measurement module, a camera module, a calculation module and a density measurement module, and the PLC module is electrically connected with the height measurement module, the computer module, the camera module and the density measurement module. According to the method, the height of goods leveled by a flatcar module in a train carriage is collected through a height measurement module, then a train number and an arrival positioning signal are collected through a camera module, and a calculation module calculates the collected goods height signal, train number, train arrival signal, goods density data and wagon information. According to the invention, the dynamic weighing of the goods can be realized, the system has the characteristics of convenient installation and low purchase and maintenance price, and the goods transportation efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mining and smelting, and relates to a train cargo weighing method based on PLC and video recognition and positioning. Background Art

[0002] In the field of domestic coal mine railway transportation, track scales, as the current mainstream coal weighing equipment, have significant limitations in their technical applications, which seriously restrict the optimization of coal mine logistics efficiency and economy.

[0003] Traditional track scale systems are usually deployed on railway trunk lines or loading stations, and measure freight mass through static weighing. However, their technical defects have gradually become apparent in actual operations. Specifically, the installation of existing track scales requires the interruption of railway transportation operations or the addition of additional independent weighing track sections, which leads to an extension of the railway network outage period in the mining area, seriously affecting the implementation of coal export plans. Moreover, track scale measurement relies on weighing operations when the train is completely stationary. A single weighing takes about 20-40 minutes, which increases the train's detention time at the station. At the same time, maintenance work is relatively heavy, with an average annual maintenance cost of 50,000 to 100,000 yuan, and the long-term economic efficiency is significantly deteriorated.

[0004] The above-mentioned technical defects make it difficult for traditional rail scale systems to adapt to the demands for efficient continuous operation and low-cost automated measurement in coal mine transportation scenarios. It is urgent to develop a new weighing technology to break through the limitations of static weighing mode and realize unmanned operation, thereby improving the economic benefits of the railway transportation system. Summary of the Invention

[0005] The purpose of the present invention is to address the problems existing in the prior art and provide a train cargo weighing method based on PLC and video recognition and positioning, which solves the problems such as the long downtime period of the mining railway network caused by the installation of the existing track scale, the long time-consuming static weighing operation of the track scale, and the increased detention time of train formations at the station.

[0006] To this end, the present invention adopts the following technical solutions: A train cargo weighing system based on PLC and video recognition and positioning, comprising: The flat car module is used to flatten the goods in the car compartment to evenly distribute the weight of the goods and avoid uneven loading. Specifically, there are excess goods collection modules on both sides of the flat car module; The height measurement module is used to measure the height of the goods in the carriage. The height measurement module is set above the train through a slide rail and is 0.5~1m away from the top of the train. Specifically, the height measurement module includes several radar level meters arranged in a regular pattern.

[0007] The camera module is used to collect the distance between the height measurement module and the train head and the train number; PLC module, used to transmit and store train volume information, cargo height, cargo density, train number information and train arrival signal; The density measurement module is used to measure the density of the goods in the carriage; specifically, the density measurement module adopts a density tester.

[0008] Calculation module, used to receive signals from the PLC module and calculate and store the weight of the goods; The height measurement module, the camera module, the density measurement module and the calculation module are electrically connected to the PLC module respectively; the flat car module, the height measurement module and the camera module are arranged in sequence along the running direction of the train.

[0009] A train cargo weighing method based on PLC and video recognition and positioning includes the following steps: Before loading the train: collect train volume information and train number; adjust the position of the height measurement module according to the size of the train car so that it evenly covers the top of the train; measure the density of the cargo in the train; train volume information includes the train height and the train bottom area.

[0010] After the train is loaded: the goods in the train are leveled and squared; the height of the goods is collected; the train car number and arrival signal are collected; the weight of the goods is calculated based on the height of the goods, the train volume information and the density of the goods, and is stored after being associated with the train number.

[0011] The beneficial effects of the present invention are: The present invention uses a height measurement module to collect the height of the coal in the train car after it has been leveled by the flattener, and then uses a camera module to collect the train number and arrival positioning signal. The calculation module calculates the collected coal height signal, car number, car positioning signal, and pre-entered coal density data and car information, thereby obtaining the weight of the coal transported by each car without time interval and automatically transmitting it to the computer for storage. The present invention can realize dynamic weighing, is easy to install, and has low procurement and maintenance costs, while significantly improving labor productivity. Specifically: 1. The present invention does not need to stop the transportation of goods during installation, nor does it need to add a track weighing section. It can be installed above the original track; 2. The present invention does not require the train to stop when weighing, and can be used for real-time weighing while the train is moving, significantly improving weighing efficiency; 3. The present invention can greatly shorten the loading and weighing time, reduce the transformation cost, reduce the maintenance cost, realize unmanned weighing, and improve labor productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a system control block diagram of the present invention; Figure 2 This is a schematic diagram of the system installation of the present invention; Figure 3 It is a structural schematic diagram of the height measurement module of the present invention.

[0013] In the figure, 1- flat car module, 2- height measurement module, 3- camera module, 4- PLC module, 5- density measurement module, 6- calculation module, 7- excess goods collection module. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is described below in conjunction with the accompanying drawings and implementation methods.

[0015] The system and method of the present invention are used for weighing bulk and powdery goods such as ore, grain, coal, etc.

[0016] This embodiment is applied to coal weighing to further describe the technical solution of the present invention.

[0017] like Figure 1 and 2 As shown, a train cargo weighing system based on PLC and video recognition and positioning includes: The flat car module 1 is used to flatten the cargo in the carriage to evenly distribute the cargo weight and avoid uneven loading. Specifically, the flat car module 1 adopts the GLPJ-2900 elevated rail spiral flattening machine produced by Wuhan Kairui Marine Hoisting Technology Co., Ltd.; the flat car module 1 is equipped with excess cargo collection modules 7 on both sides. The excess cargo collection modules 7 are integrated with the flat car module 1 and are used to collect fallen coal. The height measuring module 2 is used to measure the height of the goods in the carriage. The height measuring module 2 is set above the train through a slide rail and is 0.5m away from the top of the train. Figure 3 As shown, the height measurement module 2 includes several radar level meters arranged in a regular pattern. The number of radar level meters is adjusted according to the required height measurement accuracy, and the horizontal spacing between adjacent radar level meters is adjusted to cover the roof and divide the carriage into equal parts. Specifically, the height measurement module 2 uses the domestically produced MIK-RD903 Miko high-frequency radar level meter with a measurement range of 0-5m, solid particles / dust as the measuring medium, and an error of ±5mm. In addition, the distance between the height measurement module 2 and the flat car module 1 should ensure that the coal in the car body has been adjusted to a flat state when the train moves to the height measurement module 2. The camera module 3 is used to collect the distance between the height measurement module 2 and the train head and the train number; in addition, the flat car module 1, the height measurement module 2 and the camera module 3 are arranged in sequence along the direction of train operation, that is, after the train departs, it will pass through the flat car module 1, the height measurement module 2 and the camera module 3 in sequence; PLC module 4 is used to transmit and store train volume information, cargo height, cargo density, train number information and train arrival signal; specifically, PLC module 4 adopts Siemens 200SMATE series PLC controller; Density measurement module 5 is used to measure the density of the cargo in the carriage. Specifically, the density measurement module 5 uses the YTN-K density tester from YTNO. Based on the Boyle-Maliott law, which states that for a certain amount of gas, at a constant temperature, the pressure p and volume V of the object to be measured are inversely proportional, the loose density of the coal can be quickly determined by injecting air into a sealed coal container and measuring the air pressure. The calculation module 6 is used to receive the signal from the PLC module 4 and calculate and store the weight of the goods; the calculation module 6 adopts any one of the common intelligent processors such as multi-core CPU, NPU and LPDDR4 memory controller.

[0018] The height measurement module 2 , the camera module 3 , the density measurement module 5 and the calculation module 6 are electrically connected to the PLC module 4 , respectively.

[0019] A train cargo weighing method based on PLC and video recognition and positioning includes the following steps: Before loading the train: the floor height and bottom area of the train car are associated with the train number and then input into the PLC module 4 for storage; the position of the height measurement module 2 is adjusted according to the size of the train car so that it is evenly arranged directly above the train car; when the coal production process or coal mining deposit changes, the loose density of the transported coal is quickly measured using the density measurement device 5 and input into the PLC module 4 for storage.

[0020] After the train is loaded: the train passes through the flat car module 1, the coal is flattened and gridded, and then continues to move to the position of the height measurement module 2. The camera module 3 collects the train number and arrival signal and transmits it to the PLC module 4; after the PLC module 4 collects the train car arrival signal, it starts to collect the coal height through the height measurement module 2; the PLC module 4 transmits the train number, coal height, bottom surface area, and coal density to the calculation module 6, and the calculation module 6 calculates the coal weight, associates it with the train number, and stores it.

[0021] Specifically, the calculation module 6 calculates the coal weight using the following formula: W(total weight of coal)=∑W n W n =V (volume) × ρ (density) in: V (volume) = S (the area of the bottom of the train car) ÷ n (the number of radar level meters) × h (the thickness of the coal); h (coal thickness) = h1 (coal measurement height) - h2 (train car floor height); Where n is the number of radar level meters; ρ (density) is measured by the density measurement device 5; S (the area of the train car bottom) and h2 (the height of the train car bottom) are both known information; h1 (the coal measurement height) is measured by the height measurement module 2.

Claims

1. A train cargo weighing system based on PLC and video recognition and positioning, characterized in that: include: A flat car module (1) is used to flatten the goods in the car compartment so that the weight of the goods is evenly distributed to avoid uneven loading; A height measurement module (2) is used to measure the height of the goods in the carriage; A camera module (3) is used to collect the distance between the height measurement module (2) and the train head and the train number; A PLC module (4) for transmitting and storing train volume information, cargo height, cargo density, train number information and train arrival signal; Density measurement module (5), used to measure the density of goods in the carriage; A calculation module (6) is used to receive signals from the PLC module (4) and calculate and store the weight of the goods; The height measurement module (2), the camera module (3), the density measurement module (5) and the calculation module (6) are electrically connected to the PLC module (4) respectively.

2. A train cargo weighing system based on PLC and video recognition and positioning according to claim 1, characterized in that: The flat car module (1), the height measurement module (2) and the camera module (3) are arranged in sequence along the running direction of the train.

3. The train cargo weighing system based on PLC and video recognition and positioning according to claim 1 is characterized in that: Excess goods collection modules (7) are provided on both sides of the flat car module (1).

4. The train cargo weighing system based on PLC and video recognition and positioning according to claim 1 is characterized in that: The height measurement module (2) is arranged above the train via a slide rail, and is 0.5-1 m away from the top of the train.

5. The train cargo weighing system based on PLC and video recognition and positioning according to claim 1 is characterized in that: The height measurement module (2) comprises a plurality of radar level meters arranged in a regular pattern.

6. The train cargo weighing system based on PLC and video recognition and positioning according to claim 1 is characterized in that: The density measurement module (5) adopts a density tester.

7. A train cargo weighing method based on PLC and video recognition positioning, applied to the system according to any one of claims 1 to 6, characterized in that: The steps include: Before loading the train: collect the train volume information and train number; adjust the position of the height measurement module (2) according to the size of the train car so that it evenly covers the top of the train; measure the density of the goods in the train; After the train is loaded: the goods in the train are leveled and squared; the height of the goods is collected; the train car number and arrival signal are collected; the weight of the goods is calculated based on the height of the goods, the train volume information and the density of the goods, and is stored after being associated with the train number.

8. A train cargo weighing method based on PLC and video recognition and positioning according to claim 7, characterized in that: The train volume information includes the train height and the train bottom area.

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