Distributed Tracking And Command System Based On Embedded Notes

While the modernization of weapons and equipments enhances their quality, their complexity is also increasing, which makes the repair after finding malfunctions more difficult. It is well-known that weapons are used in battlefields. So when there is something wrong with them, it is necessary to repair them timely. However, the distribution of weapons in battlefields is very sparse and technicians can hardly arrive at the spot. The long-distance automatic tracking and command system is developed by taking advantage of computer technology. It could perform real-time measurement of distributed equipments, transmit information to rear area, analyze and infer automatically or manually, find rational repair methods and give feedback to direct users, which makes long-distance support into reality.The long-distance tracking and command system discussed in this paper consists of tracking and command platform in rear area, lots of distributed measurement nodes and the communication link between the forward and rear area. AdoptingμC/OS-II as operating system, measurement nodes are embedded systems based on 32-bit ARM. According to different equipments they link, they can perform real-time measurement of equipments' parameter according to requirements of the platform by utilizing different sensors. Then information is transmitted to the platform. The platform runs on standardized severs and possesses expert database, which enables it to proceed sampling abiding by information from knowledge base and automatically generate malfunction reports and repair methods after logical inference when there is something wrong with equipments. To guarantee the reliability of communication, TCP/IP protocol is adopted and data are enciphered before transmission. Data can also be transmitted on various wired and wireless links.Many complex malfunctions of equipments make it difficult for logical inference to detect reasons of malfunctions and repair methods. As a result, technicians have to test manually at tracking and command platform. Due to the long-distance link, it is inconvenient to transmit test commands and the feedback data is not visual, which impedes operators from give correct judgments. Aiming at various equipments we develop virtual group of instruments that couples with forward measurement nodes through communication link and provides with technicians with rapid controlling and visual feedback, which makes accurate and rapid malfunction detection into reality. Furthermore, we develop tracking and command interfaces based on context and realize the automatic display of relevant circuit diagram and pictures of components to support decisions.Inference machines and virtual instruments are developed using Delphi. The development is completed in very limited time while guarantees system functions and performance, which satisfies the requirement of timetable. Additionally, Access is used as DBMS of this system and stores not only static data such as knowledge base, information of equipments but also real-time detection data from forward tracking nodes in order to guarantee the continuity and efficiency of detection when communication is not continuous during war.In order to improve the concurrency of the system in the future, using Petri net to perform analysis and design of system model and the refinement of Petri net are also covered in this paper. This paper explores a method of refinement and proves it to be correct from its systematical nature.After being tested thoroughly, functions of this system meet the requirement of the army and overcome difficulties induced by on-spot detection. The system can guarantee the speed and accuracy of equipments in training and wartime, which promote the integrity and ability of recovering of equipments.