Centralized management and control large screen system for scrap steel enterprise

Abstract

The invention discloses a centralized management and control large screen system for a scrap steel enterprise, and belongs to the technical field of scrap steel informatization. The system comprises a production and operation monitoring analysis large-screen module, a business operation control tracking large-screen module, a reverse invoicing monitoring unit, a dynamic map unit, an in-field operation monitoring unit and a data encryption sub-module. According to the invention, dynamic calculation of core operation indexes, automatic analysis of energy saving per ton of steel and multi-dimensional visualization of purchase and sales are realized through a double-large-screen collaborative architecture; innovatively constructing an operation scale risk correction model, and dynamically calculating sales amount / tax payment amount / energy saving amount; a reverse invoicing highlight early warning mechanism and a logistics-ledger linkage model are established, and 15-minute business refreshing is supported; through TLS encryption transmission and authority hierarchical control, the operation data security and decision real-time performance are ensured, and the waste steel enterprise resource management and control precision and the supply chain cooperation efficiency are significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scrap steel informatization, in particular to a scrap steel enterprise centralized management and control large screen system. BACKGROUND

[0002] In the field of scrap steel enterprise centralized management and control, the traditional data board system has long been faced with the problem of low decision-making efficiency due to inherent defects such as fragmented function dimensions, delayed business response and lack of abnormal perception. The static monitoring scheme commonly used in the current industry has three key problems: the core operating indicators rely on manual post-accounting, leading to serious lag in updating key data; the logistics operation, financial settlement and in-site operation data are scattered and independently displayed, making it difficult to realize dynamic collaboration across business links; the risk early warning mechanism is weak, and there is a lack of real-time intervention capability for high-frequency business abnormalities. At present, there is no panoramic management and control platform for the scrap steel industry, especially lacking operating risk dynamic quantification models, multi-source business real-time linkage engines and minute-level abnormal perception mechanisms, which makes it difficult for enterprises to effectively support accurate decision-making, seriously restricting the operating risk control capability and resource allocation efficiency. SUMMARY

[0003] The purpose of the present application is to provide a scrap steel enterprise centralized management and control large screen system to solve the problems of scattered operating data, disjointed logistics monitoring and delayed abnormal response in traditional scrap steel enterprise management.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A scrap steel enterprise centralized management and control large screen system, comprising:

[0006] A production and operation monitoring and analysis large screen module for displaying core operating indicators and supporting 24-hour data refresh, comprising:

[0007] 1.1 Core operating data unit, displaying in three groups according to sales, operating scale and tax amount, wherein the target value can be adjusted manually on the page:

[0008] a) The sales target value calculation formula is: sales target value = A x 1.2;

[0009] Where A represents the sales of the previous year;

[0010] b) The sales actual value calculation formula is: sales actual value = ∑B;

[0011] Where B represents the sales invoice tax-inclusive amount of the current year;

[0012] c) The operating scale target value calculation formula is: operating scale target value = C x 1.2;

[0013] Where C represents the operating scale of the previous year;

[0014] d) The actual value of the business scale is calculated by the formula: actual value of the business scale = [(∑D / E x 45%) + F x 25% + (∑G - ∑H - ∑I) / E x 30%] x J;

[0015] wherein D represents the sales of the current year, E represents the annual progress, F represents the total assets, G represents the sales, H represents the procurement amount, I represents the inventory consumption amount, and J represents the risk correction coefficient;

[0016] and the annual progress E = K / 365;

[0017] wherein K represents the number of days that have passed in the current year;

[0018] e) The target value of the tax amount is calculated by the formula: target value of the tax amount = L x 1.2;

[0019] wherein L represents the tax amount of the previous year;

[0020] f) The actual value of the tax amount is calculated by the formula: actual value of the tax amount = ∑M;

[0021] wherein M represents the sales invoice tax amount of the current year;

[0022] 1.2 tons of steel energy-saving units, automatically calculate and display:

[0023] a) The amount of standard coal saved is N x 0.9 x 0.35;

[0024] b) The amount of new water saved is N x 0.9 x 1.7;

[0025] c) The amount of concentrate powder saved is N x 0.9 x 1.6;

[0026] d) The amount of carbon emissions reduced is N x 0.9 x 1.6;

[0027] e) The amount of waste slag reduced is N x 0.9 x 3;

[0028] f) The amount of limestone saved is N x 0.9 x 0.28;

[0029] wherein N represents the target value of the business scale in 1.1;

[0030] 1.3 Total procurement amount unit, statistics as follows:

[0031] The formula for calculating the cumulative number of suppliers is: cumulative number of suppliers = COUNT(O);

[0032] wherein O represents all suppliers since the establishment of the company;

[0033] The formula for calculating the number of procurement contracts signed is: number of procurement contracts signed = COUNT(P);

[0034] P represents the effective procurement contract with a signing time in the current year;

[0035] The annual cumulative procurement quantity calculation formula is: annual cumulative procurement quantity =∑Q;

[0036] Q represents the weight of the procurement settlement sheet accounted for in the current year;

[0037] 1.4 Procurement Tax Rate Analysis Unit, located below the Procurement Total Unit, generates a pie chart to display:

[0038] The pie chart total quantity calculation formula is: pie chart total quantity =∑R;

[0039] R represents the weight of the procurement settlement sheet in the current year;

[0040] Grouped according to the corresponding invoice tax rates of 1%, 3%, and 13%, the total quantity and percentage are marked respectively;

[0041] 1.5 Sales Trend Analysis Unit, generates a double-line chart to compare this year's and last year's monthly ∑(S);

[0042] S represents the weight of the sales settlement sheet for the current month;

[0043] 1.6 Procurement Ranking Unit, which displays the TOP10 bases' procurement quantities among non-subcompany companies in a rolling manner, wherein:

[0044] The procurement quantity calculation formula is: procurement quantity =∑U+∑V;

[0045] U represents the procurement quantity of the base in the current year, and V represents the trade sheet weight of the base in the current year;

[0046] 1.7 Sales Ranking Unit, which displays the TOP10 non-subcompany steel plant sales quantities in a rolling manner, wherein:

[0047] The sales quantity calculation formula is: sales quantity =∑W+∑X;

[0048] W represents the sales quantity of the steel plant in the current year, and X represents the trade sheet weight of the steel plant in the current year;

[0049] 1.8 Reverse Invoicing Monitoring Unit, which refreshes every 15 minutes and highlights:

[0050] a) Signed Procurement Contract Table: Query the procurement contract in the system and the contract type is base reverse invoicing and the status is effective contract, fields include natural person, category, signing time, signing tonnage, contract amount;

[0051] b) Invoice Table: Query the procurement invoice in the system with reverse invoicing marked as yes and non-red-charged accounting, fields include natural person name, invoicing time, invoicing tonnage, invoicing amount;

[0052] c) Payment record table: payment records with query status as paid and accounted and non-red and corresponding invoice reverse billing mark as yes, fields containing natural person name, payment time, payment amount.

[0053] Further, the reverse billing monitoring unit executes highlighting logic:

[0054] a) Change the color of data within 15 minutes of invoice payment operation and 1 hour of contract signing to the top;

[0055] b) Cycle through normal records when there are less than 3 data;

[0056] c) Support clicking on contracts / invoices to view attachments and original invoices.

[0057] Further, it also includes:

[0058] Business operation control and tracking large screen module for logistics and in-site monitoring, including:

[0059] 2.1 Dynamic map unit, performing:

[0060] a) Automatically capture the latest one-month business routes, and if the route is > 20, display the 20 farthest routes;

[0061] b) Blur non-business provinces, and classify and mark central bases (five-star icons), ordinary bases, and steel plants;

[0062] c) Click on the icon to display the full name of the base / steel plant and the icon information maintained;

[0063] 2.2 Procurement and sales contract table unit, scrolling to display:

[0064] a) Purchase contract: contracts with query status as in execution and settlement amount greater than 0, fields containing contract number, supplier, signing time, settlement amount, settlement amount, contract expiration date;

[0065] b) Sales contract: contracts with query status as in execution and settlement amount greater than 0, fields containing contract number, customer, signing time, contract quantity, contract amount, and delivery quantity;

[0066] 2.3 In-site operation monitoring unit, updated every half hour:

[0067] a) Display status in two processes of procurement / sales:

[0068] Procurement: waiting for entry -> entry weighing -> quality inspection -> exit weighing -> exit inspection;

[0069] Sales: waiting for entry -> entry weighing -> loading -> exit weighing -> exit inspection;

[0070] b) The additional state flow chart shows the total number of nodes of each vehicle;

[0071] c) Detailed information of these data is displayed under the flow display state, including date, customer, current state and license plate number, and the delivery / receipt details page of the corresponding invoice is popped up by clicking any one of the invoices;

[0072] 2.4 Function area unit, integration:

[0073] a) Purchase and sale contract account link: jump to the purchase and sale contract account report interface of the company business system;

[0074] b) Price query link: a table is popped up to display the current central base price, the table includes date, material, price and base fields, and the materials and bases participating in statistics can be configured, wherein the price calculation formula is as follows:

[0075] The designated base material daily average price = ∑Y / ∑Z;

[0076] Wherein Y represents the total settlement amount of the base material transaction on the day, and Z represents the total settlement quantity of the base material transaction on the day;

[0077] c) External system link: platform notarization query (jump to renewable resource platform), logistics query (jump to third-party system).

[0078] Further, the purchase and sale contract account unit responds to map interaction: when the steel plant icon is clicked, the sales contract of the steel plant is dynamically filtered and displayed; the data completion logic of the on-site operation monitoring unit: when the number of running invoices is less than 20, the out-of-warehouse / in-warehouse records are filled.

[0079] Further, the two large screens share:

[0080] a) Data encryption submodule, using TLS protocol to encrypt data transmission;

[0081] b) Permission control submodule, limiting the operation and viewing permissions of the centralized control large screen according to roles;

[0082] c) Real-time synchronization submodule, ensuring the consistency of the data of the company business system and the data displayed on the large screen.

[0083] Compared with the prior art, the beneficial effects of the present application are:

[0084] 1. The present application integrates dynamic calculation of business indicators (including risk correction model) and real-time monitoring of logistics (including map-invoice linkage) through double-screen physical partition design, eliminating data silos.

[0085] 2. The present application innovates ton steel saving automatic quantification engine (6 resource calculations) and minute-level highlight early warning mechanism (reverse billing monitoring), realizing double control of resources and risks.

[0086] 3. The present application constructs a full-link data closed loop: from procurement tax rate analysis -> sales trend comparison -> on-site process monitoring -> external system jump.

[0087] 4. The present application ensures panoramic data security through the trinity of TLS encryption + permission grading + real-time synchronization. BRIEF DESCRIPTION OF DRAWINGS

[0088] Figure 1 Effect picture of production and operation monitoring and analysis large screen of the present application;

[0089] Figure 2 Effect picture of business operation management and control tracking large screen of the present application;

[0090] Figure 3 Effect picture of price inquiry table of the present application;

[0091] Figure 4 Purchase contract ledger page screenshot of the present application;

[0092] Figure 5 Sales contract ledger page screenshot of the present application;

[0093] Figure 6 Receive / send goods details page screenshot of the present application. DETAILED DESCRIPTION

[0094] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0095] To solve the core problems of scattered business data, disconnection of logistics monitoring and delayed abnormal response in traditional scrap steel enterprise management, please refer to Figures 1-6 The present embodiment provides the following technical solutions:

[0096] I. Production and operation monitoring and analysis large screen module

[0097] 1. Core business data unit ( Figure 1 central area):

[0098] a) Sales target value calculation: the system automatically calculates the target value from the sales of the previous year A (stored in the annual summary table of the business system) according to the formula A multiplied by 1.2, and the calculation result supports manual adjustment by the administrator on the page.

[0099] b) Sales Actual Value Calculation: Collect all sales invoices of this year's tax-included amount B every day, get the actual value by summation ∑B, and refresh the display.

[0100] c) Business Scale Target Value Calculation: Read the last year's business scale C (from the business analysis system), calculate the target value by formula C multiplied by 1.2, and support manual adjustment.

[0101] d) Business Scale Actual Value Calculation: Perform the compound formula calculation every day, use parameters: this year's sales ∑D, year progress E (calculated by the number of days K passed this year divided by 365), total assets F, sales ∑G, purchase ∑H, inventory consumption ∑I, and risk correction coefficient J. The calculation formula is: [(∑D / E×45%)+F×25%+(∑G-∑H-∑I) / E×30%]×J.

[0102] e) Tax Amount Target Value Calculation: Read the last year's tax amount L (provided by the tax system), calculate the target value by formula L multiplied by 1.2, and support manual adjustment.

[0103] f) Tax Amount Actual Value Calculation: Calculate the tax amount of this year's sales invoices ∑M every day, and refresh the display once.

[0104] 2. Tons of Steel Energy Saving Unit ( Figure 1 Lower middle position): Read the business scale target value N automatically every day, and calculate the six resource saving amounts in turn:

[0105] a) Standard Coal Saving Amount = N × 0.9 × 0.35

[0106] b) New Water Saving Amount = N × 0.9 × 1.7

[0107] c) Concentrate Powder Saving Amount = N × 0.9 × 1.6

[0108] d) Carbon Emission Reduction Amount = N × 0.9 × 1.6

[0109] e) Waste Residue Reduction Amount = N × 0.9 × 3

[0110] f) Limestone Saving Amount = N × 0.9 × 0.28

[0111] The calculation results are displayed in a card layout.

[0112] 3. Total Purchase Amount Unit ( Figure 1 Upper left corner):

[0113] a) Cumulative Number of Suppliers: Count the cumulative number of suppliers in the supplier master table O every day.

[0114] b) Annual Cumulative Purchase Amount: Count the weight of this year's recorded purchase settlement ∑Q every day, and refresh every hour.

[0115] c) Number of procurement contracts signed: The number of procurement contracts P that are effective in the current year is counted daily.

[0116] 4. Procurement Tax Rate Analysis Unit ( Figure 1 (below the total procurement volume unit)

[0117] Total Pie Chart Calculation: Update the annual purchase settlement weight ∑R daily.

[0118] Tax rate grouping: Purchase settlement documents are grouped according to three tax rates of 1%, 3%, and 13%, and the weight percentage of each group is calculated. The pie chart is refreshed every 2 hours.

[0119] 5. Sales Trend Analysis Unit ( Figure 1 (Top right corner): Daily updates of the double line chart, simultaneously displaying:

[0120] a) The cumulative value of the monthly sales settlement statement weight ∑S for this year

[0121] b) ∑S value in the same month of the previous year

[0122] The charts allow you to view detailed monthly data by hovering the mouse over them.

[0123] 6. Procurement Ranking Unit ( Figure 1 Bottom left corner: Daily updates of the TOP 10 base procurement volume rankings (excluding subsidiaries).

[0124] Purchase quantity calculation formula: ∑U (purchased and received quantity at this base) + ∑V (trade order weight at this base)

[0125] Supports scrolling display of base name and purchase quantity.

[0126] 7. Sales Ranking Unit ( Figure 1 (Below the procurement ranking section): Daily updates on the sales volume of the top 10 non-subsidiary steel mills.

[0127] Sales volume calculation formula: ∑W (sales outbound volume for the steel mill for the customer) + ∑X (trade order weight for the steel mill for the customer)

[0128] Supports scrolling display of steel mill name and sales volume figures.

[0129] 8. Reverse invoicing monitoring unit ( Figure 1 (Bottom right corner): Perform the following actions every 15 minutes:

[0130] a) Query the purchase contracts that have been reverse-billed at the base and are in effect.

[0131] b) Query invoices marked as reverse invoicing and that have been posted (not red-inked invoices).

[0132] c) Query the payment records for the corresponding invoice.

[0133] Highlighting logic:

[0134] i. Records signed within 1 hour and invoiced / paid within 15 minutes will be displayed at the top (red background).

[0135] ii. When there are fewer than 3 highlighted records, cycle through and display the regular records.

[0136] iii. Users can click on any record to view the electronic invoice image.

[0137] II. Business Operations Management and Tracking Dashboard Module

[0138] 1. Dynamic map unit ( Figure 2 (Central Area): Retrieves business routes from the logistics system every 30 minutes for the past 30 days, and displays them according to the following logic:

[0139] a) When there are more than 20 routes, only the 20 routes with the furthest distance will be displayed.

[0140] b) Blur processing of non-business province map areas

[0141] c) Tag type:

[0142] i. Central Base: Red Five-Pointed Star Icon

[0143] ii. Standard Base: Blue circular icon

[0144] iii. Steel mill: Green square icon

[0145] Clicking on any base or steel mill icon will display its full name and maintenance information (images).

[0146] 2. Procurement and Sales Contract Ledger Unit ( Figure 2 Bottom left / bottom right corner):

[0147] a) Procurement Contract Ledger: Daily query for contracts with a status of "in execution" and a settlement amount greater than 0, displaying fields such as contract number and supplier (see...). Figure 2 (bottom left corner)

[0148] b) Sales Contract Ledger: Daily query for contracts with a status of "in execution" and a settlement amount greater than 0, displaying fields such as contract number and customer (see...). Figure 2 (Top right corner)

[0149] In addition, the sales contract ledger supports map linkage: when you click on the steel mill icon on the map, the sales contract ledger automatically filters out contracts related to that steel mill.

[0150] 3. On-site operation monitoring unit ( Figure 2 (Top left / top right corner): Process status display:

[0151] a) Five stages of the procurement process: waiting to enter the site -> entering the site weighing -> quality inspection -> leaving the site weighing -> leaving the site inspection ( Figure 2 (Top left corner)

[0152] b) Five stages of the sales process: waiting to enter the site -> weighing upon entry -> loading -> weighing upon exit -> inspection upon exit ( Figure 2 (Top right corner)

[0153] Data update mechanism:

[0154] The number of vehicles at each node is refreshed every 30 minutes.

[0155] The details section displays the date, customer, current status, and license plate number.

[0156] Clicking the license plate number will bring up the shipping / receiving details page (see...). Figure 6 )

[0157] Data completion: When there are fewer than 20 vehicles in operation, automatically fill in the most recently completed outbound / inbound records.

[0158] 4. Functional area units ( Figure 2 top):

[0159] a) Link to the Procurement and Sales Contract Ledger: Click to jump to the business system ledger report (see...) Figure 4 / Figure 5 )

[0160] b) Price Inquiry Function: Supports users to select the base and material range. The system calculates the daily average price of materials at the specified base: ∑Y / ∑Z of the total transaction volume of materials at the base on that day.

[0161] The table displays fields such as date, material, price, and base (see table below). Figure 3 )

[0162] c) External system links:

[0163] Platform Evidence Storage Inquiry: Redirect to the invoice evidence storage page of the renewable resources platform.

[0164] Logistics tracking: Redirects to a third-party logistics tracking system (custom address configuration supported).

[0165] III. Collaborative Control Mechanism

[0166] 1. Data linkage mechanism:

[0167] a) Map-Ledger Linkage: Clicking the steel mill icon on the map triggers dynamic filtering of the sales contract ledger.

[0168] b) On-site monitoring and completion: When there are fewer than 20 documents in operation, automatically fill in the outbound / inbound records of the most recent 24 hours.

[0169] 2. Safety control system:

[0170] a) Data encryption: All transmitted data is encrypted using the TLS protocol (256-bit key).

[0171] b) Hierarchical access control:

[0172] i. Regular business personnel: can only view the production and operation monitoring and analysis dashboard and the operation control and tracking dashboard.

[0173] ii. Large screen control for machines and administrators: Target values ​​can be adjusted, and data completion rules can be configured.

[0174] c) Real-time synchronization:

[0175] i. On-site operation monitoring: Synchronizes with the business system every 30 minutes.

[0176] ii. Reverse invoicing: Incremental synchronization every 15 minutes

[0177] 3. Exception handling mechanism:

[0178] a) When data synchronization fails:

[0179] i. Automatically switch to the most recently valid cached data

[0180] ii. Send an alert notification to the administrator (including the error code and the scope of impact).

[0181] b) Alarm for key indicators exceeding thresholds:

[0182] i. An alert is triggered when the actual tax payment is 80% lower than the target value.

[0183] ii. An analysis report will be triggered when the actual value of the operating scale fluctuates by more than 15%.

[0184] In summary, this invention solves the problems of fragmented data display, lagging calculation of operating indicators, and disconnect between logistics monitoring and business operations in traditional scrap steel enterprises. It achieves dynamic calculation of core operating indicators, automatic analysis of energy savings per ton of steel, and multi-dimensional visualization of procurement and sales through a dual-screen collaborative architecture. It innovatively constructs an operating scale risk correction model to dynamically calculate sales revenue, tax amount, and energy savings. It establishes a reverse invoicing high-highlight warning mechanism and a logistics-ledger linkage model, supporting 15-minute business updates. Through TLS encrypted transmission and hierarchical access control, it ensures the security of operating data and the real-time nature of decision-making, significantly improving the accuracy of resource management and supply chain collaboration efficiency for scrap steel enterprises.

[0185] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A centralized management and control large screen system for a scrap steel enterprise, characterized in that: Comprise: Production and operation monitoring analysis large screen module, for showing core business indicators, support 24 hours data refresh, including: 1.1 Core business data unit, according to sales, business scale and tax amount divided into three groups to show, which target value support manual adjustment on the page: a) sales target value calculation formula: sales target value = A x 1.2; Where A represents the sales of last year; b) sales actual value calculation formula: sales actual value = ∑B; Where B represents the tax-included amount of sales invoice this year; c) business scale target value calculation formula: business scale target value = C x 1.2; Where C represents the business scale of last year; d) business scale actual value calculation formula: business scale actual value = [(∑D / E x 45%) + F x 25% + (∑G - ∑H - ∑I) / E x 30%] x J; Where D represents the sales of this year, E represents the year progress, F represents the total assets, G represents the sales, H represents the procurement amount, I represents the inventory consumption amount, and J represents the risk correction coefficient; And the year progress E = K / 365; Where K represents the number of days passed this year; e) tax amount target value calculation formula: tax amount target value = L x 1.2; Where L represents the tax amount of last year; f) tax amount actual value calculation formula: tax amount actual value = ∑M; Where M represents the tax amount of sales invoice this year; 1.2 tons of steel energy saving unit, automatically calculates and displays: a) standard coal saving amount = N x 0.9 x 0.35; b) new water saving amount = N x 0.9 x 1.7; c) concentrate powder saving amount = N x 0.9 x 1.6; d) carbon emission reduction amount = N x 0.9 x 1.6; e) waste residue reduction amount = N x 0.9 x 3; f) limestone saving amount = N x 0.9 x 0.28; Where N represents the business scale target value in 1.1; 1.3 total procurement amount unit, statistics as follows: Supplier cumulative number calculation formula: supplier cumulative number = COUNT(O); Where O represents all suppliers since the establishment of the company; Procurement contract signing amount calculation formula: procurement contract signing amount = COUNT(P); Where P represents the effective procurement contract with the signing time being this year; Yearly cumulative procurement amount calculation formula: yearly cumulative procurement amount = ∑Q; Where Q represents the weight of the accounted procurement settlement invoice this year; 1.4 procurement tax rate analysis unit, located below the total procurement amount unit, generates a pie chart to display: Pie chart total amount calculation formula: pie chart total amount = ∑R; Where R represents the procurement settlement invoice weight this year; Grouped according to 1%, 3% and 13% tax rates of corresponding invoice tax amount, respectively marked with total amount and percentage; 1.5 sales trend analysis unit, generates a double line chart to compare this year and last year's ∑(S) monthly; Where S represents the weight of the settlement invoice of this month; 1.6 procurement ranking unit, rolling display of TOP10 base non-molecular company procurement amount, wherein: Procurement amount calculation formula: procurement amount = ∑U + ∑V; Where U represents the procurement warehouse-in amount of this base this year, and V represents the trade single weight of this base this year; 1.7 Sales ranking unit, TOP10 non-molecular company steel plant sales are displayed in a rolling manner, wherein: The sales calculation formula is: sales = ∑W + ∑X; Wherein W represents the sales delivery quantity of the customer for the steel plant in the current year, and X represents the trade single weight of the customer for the steel plant in the current year; 1.8 Reverse billing monitoring unit, refreshed every 15 minutes and highlighted: a) Signing purchase contract table: query the purchase contract in the system and the contract type is base reverse billing and the state is effective contract, the fields include natural person, category, signing time, signing tonnage, contract amount; b) Invoice table: query the purchase invoice in the system with reverse billing marked as yes and non-red-charged accounting, the fields include natural person name, invoice time, invoice tonnage, invoice amount; c) Payment record table: query the payment record with the state of paid and non-red-charged accounting and the corresponding invoice reverse billing marked as yes, the fields include natural person name, payment time, payment amount.

2. The scrap steel enterprise centralized management and control large screen system according to claim 1, characterized in that: The reverse billing monitoring unit executes the highlight logic: a) Change the color of the data within 15 minutes of issuing invoices / paying operations and within 1 hour of signing contracts to the top; b) When there are less than 3 data, the normal records are displayed in a loop; c) Support clicking on the contract / invoice to view attachments and original invoices.

3. The scrap steel enterprise centralized management and control large screen system according to claim 1, characterized in that: Also includes: Business operation control and tracking large screen module for logistics and on-site monitoring, including: 2.1 Dynamic map unit, performs: a) Automatically capture the business route in the last month, if the route > 20, display the 20 farthest; b) Virtualize non-business provinces, classify and mark central bases (five-star icons), ordinary bases, and steel plants; c) Click on the icon to display the full name of the base / steel plant and the icon information maintained; 2.2 Purchase and sale contract ledger unit, rolling display: a) Purchase contract: query the contract with the state of execution and settlement amount greater than 0, the fields include contract number, supplier, signing time, settlement amount, settlement amount, contract expiration date; b) Sales contract: query the contract with the state of execution and settlement amount greater than 0, the fields include contract number, customer, signing time, contract amount, contract amount, delivery amount; 2.3 On-site operation monitoring unit, updated every half hour: a) Display the state separately for purchase / sale process: Purchase: waiting for entry->entry weighing->inspection->exit weighing->exit inspection; Sales: waiting for entry->entry weighing->loading->exit weighing->exit inspection; b) Additional state flowchart displays the total number of vehicles at each node; c) Display detailed information of these data below the process display state, including date, customer, current state and license plate number, click on any one document to pop up the corresponding delivery / receipt details page; 2.4 Function area unit, integrated: a) Purchase and sale contract ledger link: jump to the purchase and sale contract ledger report interface of the company's business system; b) Price query link: pop up a table to display the current central base price, the table includes: date, material, price, base field, and supports configuring materials and bases for statistics, wherein the price calculation formula is as follows: Designated base material daily average price = ∑Y / ∑Z; Wherein Y represents the total settlement amount of the base material transaction, Z represents the total settlement quantity of the base material transaction; c) External system link: platform evidence query (jump to the renewable resource platform), logistics query (jump to the third-party system).

4. The scrap steel enterprise centralized management and control large screen system according to claim 3, characterized in that: The sales contract account unit responds to map interaction: when the steel plant icon is clicked, the sales contract of the steel plant is dynamically filtered and displayed; the data completion logic of the on-site operation monitoring unit: when the number of running bills is less than 20, the out-of-warehouse / in-warehouse records are filled.

5. The scrap steel enterprise centralized management and control large screen system according to claim 3, characterized in that: The two large screen modules share: a) Data encryption submodule, using TLS protocol to encrypt data transmission; b) Permission control submodule, limiting the operation and viewing permissions of the centralized control large screen according to roles; c) Real-time synchronization submodule, ensuring the consistency of company business system data and large screen display data.

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