System and method for positioning underground coal mine staff based on RSS (received signal strength) and TOA (time of arrival) complementation

Abstract

The invention discloses a system and a method for positioning underground coal mine staff based on RSS (received signal strength) and TOA (time of arrival) complementation, and belongs to the field of mine monitoring and communication. The direction of the staff is determined by the aid of a directional antenna, distance information of a staff positioning card reader and an identification card is detected by an RSS method with high accuracy in an area which possibly cannot be detected by a TOA method, distance information is detected in other areas by the TOA method with higher accuracy, processing delay is fixed, signals are repeatedly transmitted and received by a transmitting end and a receiving end, timing errors of timing equipment are eliminated, positioning information including identity information of the underground coal mine staff is generated and outputted, and the underground coal mine staff is accurately positioned. Under the condition of decreasing positioning equipment and positioning density, the problems that errors are large when a measured distance is long in a roadway by the RSS method and misreading is caused when the measured distance is short in the roadway by the TOA method are solved, so that the underground coal mine staff is accurately positioned.

Description

technical field [0001] The invention relates to a coal mine underground personnel positioning system and positioning method based on complementary RSS and TOA, which are specifically applied in the field of mine monitoring and communication. Background technique [0002] The "Notice of the State Administration of Work Safety and the National Coal Mine Safety Supervision Bureau on the Construction and Improvement of the "Six Major Systems" for Underground Coal Mine Safety and Avoidance" (An Jian Zong Meizhuang [2010] No. 146) requires the construction and improvement of the coal mine underground personnel positioning system. Give full play to the role of the underground personnel positioning system in personnel management and emergency rescue work. "Priority should be given to products with advanced technology, stable performance, and high positioning accuracy to ensure that the dynamic distribution of underground personnel and the number of personnel in the mining face are a...

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Problems solved by technology

[0004] However, the underground environment of coal mines is narrow, the distance is short, there are dampers, locomotives and other blocking objects, the roadway is inclined, and the surface of the roadway is rough, etc., and the transmission loss is large, which will cause unstable and unpredictable losses during the transmission of electromagnetic wave signals. When the distance between the card reader and the personnel positioning identification card is large, there will be a large ranging error

[0005] On the other hand, the application of TOA technology for personnel positioning is affected by the accuracy of the timer. When the distance between the personnel positioning identification card and the personnel positioning card reader is relatively close, the propagation time of the signal at this distance is less than the time resolution of the timer. , there will be situations where TOA detection cannot be achieved

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