Rapid and precise GPS signal correction and positioning method for hot metal car

Abstract

The invention relates to a rapid and precise GPS signal correction and positioning method for a hot metal car. The method comprises the steps: performing the automatic calculation and judgment of thecollected GPS signal, RFID signal and vehicle direction signal through the GPS signal enhancement technology and the RFID positioning technology via a background computer automatic rectification method according to the GPS signal quality and a feedback position signal; automatically selecting a stable position signal; automatically performing the simulation tracing of a vehicle when the GPS signalis not stable; automatically switching to the GPS signal when the signal returns to a normal state, thereby achieving the precise positioning of the hot metal car. The method employs the technologiesof wireless network, RFID, GPS and computer, achieves the whole-process positioning and tracking of the hot metal car in a transportation process, provides a remote electronic eye for a production manager and a scheduling commander, achieves the complete mastering of the continuous track of the operation of the hot metal car, provides accurate and reliable data for the automatic scheduling of thevehicle for the background program, changes the blind adjustment of the hot metal car into the apparent adjustment, guarantees the safe outputting and safe delivery of iron to maximum degree, and improves the hot metal scheduling efficiency.

Description

technical field [0001] The invention relates to the technical field of positioning in a workshop, in particular to a method for fast and accurate GPS signal correction and positioning of a molten iron car. Background technique [0002] The traditional ladle transport vehicle adopts the rail transportation mode. Generally, labels are installed on the bottom of the molten iron transport vehicle, sensors and other equipment are installed on the track, and the transmission is transmitted to the background database through a wired network, and the position of the ladle is located through the background software. [0003] Compared with rail transportation, trackless iron transportation in iron and steel enterprises has significant advantages such as less land occupation, low cost, and flexible mobility. It is not only green and environmentally friendly, but also energy-saving and consumption-reducing. The key link of management and control, the positioning and tracking of the trac...

AI Technical Summary

Problems solved by technology

Since the temperature of molten iron is as high as 1400°C, it is a high-temperature molten liquid. The weight of iron ladle (including ladle weight and molten iron weight) carried by the molten iron car is more than 300 tons. Once a dangerous situation occurs, it is easy to cause major accidents, resulting in dangerous accidents in production, equipment, and personal safety.

The traditional positioning and tracking of molten iron vehicles adopts the GPS positioning method. The positioning is easily affected by obstacles and weather, and the signal is relatively lagging. There are the following problems: (1) GPS is greatly affected by the weather and position. GPS positioning will be greatly affected, or even unable to provide positioning services, and the positioning accuracy is poor, making it difficult to meet the system control requirements; (2) the number of general GPS signal tracking satellites is relatively large Less, when encountering obstacles in different directions, the signal is difficult to receive; (3) relying solely on GPS feedback signals to judge the direction of the vehicle, the lag is obvious

[0007] 1. The molten iron car is a mobile carrier. The commonly used GPS tracking signal is easily interfered by obstacles in the steel plant, and the signal drifts obviously. It is necessary to solve the accurate tracking of the vehicle when the signal drifts;

[0008] 2. In the narrow iron-steel interface of the steel plant, the GPS signal lags significantly;

[0009] 3. In the narrow interface between iron and steel in the iron and steel plant, and the molten iron cart is relatively large, how to quickly judge its running direction, especially when turning is more difficult;

[0010] 4. In critical and high-risk locations, fast and accurate positioning is required

Images