Underground operators ultrasonic location system and method thereof

Abstract

This invention relates to downhole operation hypersonic positioning system and its method, which comprises safety hat movable terminal, street base station and network connection management center, wherein, the management center sets base station parameter with certain distance to send one impulse trigger signal and one hypersonic impulse sequence; the movable terminal recording the trigger signal and receiving the hypersonic impulse signal time interval; getting the distance between the movable terminal and base station according the known time; sending the information of terminal, distance, direction and codes to the radio communication channel and to the management center to display operation person position.

Description

Technical field: [0001] The invention relates to the field of mine safety monitoring, in particular to a system and method for accurately locating underground operators. technical background: [0002] The underground working environment of the mine is complex. The mine tunnels stretch for tens of kilometers in length and width. Scheduling, it is also difficult to assess the time and whereabouts of the operators. Once a fire, flood, gas, coal dust explosion and other accidents occur underground, due to the inability to accurately locate the location and distribution of personnel before the accident, large mechanical equipment cannot be used for rescue work, which often delays the best time for rescue and causes irreparable damage. loss. If the position of the underground personnel before the accident can be accurately located, the rescue speed can be greatly accelerated and the loss can be minimized. [0003] At present, there are mainly two methods for underground positio...

AI Technical Summary

Problems solved by technology

[0004] Another method is the radio frequency signal strength calculation method announced by the patent document CN1694569A. Two-way communication of radio frequency signals is carried out between the mobile node and the base station. The distance between the personnel and the base station is combined with the position information of the base station itself to achieve positioning. The positioning accuracy of this device depends on the strength of the radio frequency signal received by the base station. Due to the multiple reflections and diffractions of electromagnetic waves in the roadway, the movement The signal strength received by the nodes and the distance between the base stations are not linear and statistically related, resulting in a large error. The positioning accuracy error of this method can reach more than 15 meters, which can only provide limited help for rescue work, and the distance is still practical. difference

Images