Position identification card for downhole personnel in coal mine and card reading mode

Abstract

The invention relates to a position identification card for downhole personnel in a coal mine and a card reading mode. A central processor is arranged in an identification card and connected with a low-frequency receiving and transmitting module, a high- frequency receiving and transmitting module and a power supply module. The card reading mode comprises the following steps: a plurality of mine substations established downhole cover the card reading area through low-frequency signals, the identification card keeps watch the commands of the mine substations through the low-frequency module; when the identification card enters the coverage area, communication with the mine substations is established and the card number is sent to the mine substations, the mine substations perform verification and storage processing and send a card disabling command to the identification card, and the identification card automatically enters the next round of watchkeeping after 30 seconds after disabling. The identification card and the mine substations realize identification through the wireless radio frequency technology, so as to ensure the completeness and the accuracy of the identification card data received by the mine substations.

Description

technical field [0001] The invention relates to an identification card and a card-reading method, in particular to an identification card and a card-reading method carried by coal mine underground personnel to realize identification through radio frequency technology. The invention belongs to the technical field of personnel safety management in underground coal mines. Background technique [0002] Coal mine safety management is an important link to ensure safe production. How to ensure the safety of underground workers in coal mines is the work that authorities at all levels are most concerned about and valued. To ensure the safety of underground workers in coal mines, safety management measures should be taken as the first priority, followed by practical safety management equipment, using modern means to monitor the location, number of workers, and working hours of underground workers in coal mines. . In recent years, accidents in coal mines have been frequent. After mos...

AI Technical Summary

Problems solved by technology

However, most of the identification cards and ground equipment in the existing technology use RFID technology. This communication method has defects, and it is easy to cause inaccurate card reading at mine substations installed in the underground, and the number of concurrency is small, and the situation of missed reading is serious.

[0003] First, in the existing card reading technology, as a passive card number receiving device, the mining substation can only continuously receive the card number sent by the identification card. The substation directly uploads all the data received to the upper computer in the ground equipment or the mining substation for storage and processing by itself and waits for the upper computer to read, while the identification card is only used as a code transmitter, which is uninterrupted within a certain time interval When the card number information is sent out, when entering the receiving range of the mining substation, the mining substation captures the card number information within the signal coverage area, but the identification card has no way of knowing whether it has been read by the mining substation

In this way, when a large number of identification cards enter the receiving range of the mining substation at the same time, there will be a large amount of repeated data sent to the mining substation, and the mining substation can only store and process the received complete and non-conflicting data. If the read card number keeps sending data repeatedly, it will not be recognized and stored repeatedly. For different data received at the same time, only one piece of information or multiple pieces of information will be lost due to conflicts and errors, resulting in a large number of identification cards. Missing readings and misreadings are serious when passing through the signal range of mining substations

Secondly, in the existing technology, mining sub-stations usually use the method of actively sending the stored information to the upper computer to transmit data. When two or more mining sub-stations read the identification card information at the same time and need to send , the upper computer also has hidden dangers of data conflicts for the information sent by different mining sub-stations at the same time. In the lighter cases, data conflicts cause bit errors and the upper computer cannot recognize them. In severe cases, it will cause data congestion on the bus network and the sub-stations actively Send the stored data and delete it immediately, if the host computer cannot accept it correctly, the data will be permanently lost

[0004] In view of the problem of the communication method with the mine substation that the identification card of the aforementioned prior art exists, thereby it often leads to misreading and missing reading of the identification card carried by some workers in the underground. Therefore, it is inevitable that once an accident occurs, the underground The phenomenon of not being able to grasp the situation clearly brings great difficulties to the rescue work

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