Strengthening the management of coal mine Lamp usage, including the management of mining equipment storage sites, maintenance sites, distribution, etc., ensuring that the miner's lamp is in good condition and can effectively meet the normal and special conditions of underground use is an important condition for ensuring the safe production of coal mines. The purpose of studying various management methods of miner's lamps is to obtain a safe production environment and to seek the best economic benefits of mining, to ensure the need for safe production and normal production.
The intelligent management software of the miner's lamp can realize the automatic management of personnel and miner's lamp: every employee in the mine is equipped with a unique bar code data identification ID. The software is used in conjunction with bar code technology to record the situation of miners entering and leaving the miner's lamp room.
The bar code combines the employee number and various other codes to allow or limit the detailed information contained in the access bar code for the predetermined area to be collected by the smart light system. Currently, the bar code is closely combined with the unique number on the RFID tag, RFID The tag is attached to a miner's lamp or other device. This process is part of the database's primary design and is associated with the distribution of the miner's lamp in the system. The only thing left is the maintenance issue - adding new assignments as new employees arrive When an employee leaves the company, the previous assignment is removed.
1 System planning and selection of solutionsApplying RFID systems to mines has proven to be a serious challenge. Initially, the 125-kHz low-frequency and 13.56 MHz high-frequency passive tags were used to tailor the label to the (mining) cap light battery case. Install the reader (transponder) near the turnstile in the equipment distribution room and at the exit of the miner's lamp room to the wellbore. The cross-turn door also has a barcode scanner for reading each miner's ID card to confirm whether Allowed to pass.
However, the RFID system failed to meet the minimum reading distance of 600 mm, as three regional miners had to pass the turnstile. If the reading range of the system is less than 60O mm, a reading error may occur. Active tags have also been studied. If an active tag is used, the RFID system can have a larger reading distance when tracking the item, but since the active tag is too expensive compared to the passive tag, this solution is not preferable.
Another option is the 900 MHz UHF passive tag and reader. Since water and metals can cause RFID interference and do not achieve high read rates, all tools used by miners are made manually from different materials. Because the lamp is made of plastic. The reading of the 900 MHz UHF tag has no effect and the cap lamp label is easier to handle. The self-contained self-help kit is surrounded by a stainless steel container that interferes with the reading of the 900 MHz UHF tag. The gas detection device is also wrapped in stainless steel, which interferes with the operating frequency of the tag and reader.
2 system implementation and equipment selectionDual-band RFID technology combines the advantages of low-frequency (125-135 kHz) transmission and high-speed (6.8 MHz) RFID high-speed data transmission. The RFID reader transmits low frequency signals to power the tag. The tag uses a high-frequency spectrum to transmit signals to the reader. This dual-frequency performance enables successful reading of multiple tags, even when many miners gather and the number of people going down is decreasing. The system reads an average of 7,200 tags per minute on a continuous basis with a reading range of 0.6 to 2 m. The system can be operated through liquids and even certain metals. An RFID system with better performance than 13.56MHz and 860~960 MHz.
Eight dual-frequency readers and 5,000 tags were tested in a miner's lamp room. In addition, the installation work includes setting up a local area network (LAN) to connect the reader and determine the configuration of the miner's room reader to optimize the system. The results show. The dual-frequency system can “achieve a high degree of accuracy†and can meet the need to track the movement of miners in and out of the miner's lamp room. Essentially, the miner moves along a predetermined route equipped with readers to collect data on miners and cap lights because the cap lights have passed these predetermined points.
The system combines an RFID reader network with a mining enterprise resource planning (ERP) system. The system obtains time and field data time and field data from the human resource module of the mining ERP system, which is integrated with the item release information of the miner's lamp house. The item release information of the miner's lamp house was collected from the RFID reader. These integrated data. In the past, it was usually used to make bills related to the use of mining lamps and equipment, as well as management information. A smart light system is used to give a list of all units. In order to make a bill.
3 System featuresThe main advantage of the intelligent light system integrated with RFID and system is that it can track the situation of miners passing the turnstile. It can indicate the path of workers from the ground to the ground. Since the first system was tested and installed, the system read success rate was 100%. The system can track the movement of equipment and miners on a continuous basis. The implementation of RFID tracking (system) can provide the second stage safety inspection of the mine. The information generated by the system allows any miner to quickly confirm when he has not returned to the lamp room after his shift to determine where he is.
By tracking and recording the number of shifts per day, the RFID system obtains information on the number of employees in each shift and the maintenance of safety devices. For all equipment and programs that have been manually managed, a complete maintenance history is necessary. of. The repaired or maintained equipment is recorded to the repair platform via the RFID system. A miner's lamp is equipped with a unique identification code, and then all of the repaired and replaced parts can be collected with their unique miner's number to build a complete service log. The smart light system maintains a complete list of spare items, components, and their respective prices, making it possible to track cost, spare items, and component usage. The electronic generation of some required reports reduces the need for labor in this area and reduces the errors caused by humans.
The RFID system integrates the smart light application software and also takes into account the safety check of the turnstile pass point. It is only allowed to enter and exit the wellbore through the turnstile when the miner has a distributed miner's lamp, a fully equipped self-help kit and a portable gas detection device. Information collected through the RFID system prevents counterfeit use of the identification card and prevents other personnel from entering and exiting the mine, as only qualified miners who have the bar code ID label and the bar code number of the miner and its device RFID tag code must enter the same Previously, the code assigned by the intelligent database matched the RFID data obtained from the reader (transponder) into various reports according to the needs of each mining location, locating the movement of the personnel. Loss of equipment, as well as tracking and removal of equipment for repair or exchange.
4 ConclusionBefore the system was put into operation, the loss rate of miner's lamps at a specific location was as high as 25% per month. Because there is no mechanism to identify the device and it cannot be associated with a specific individual. It is impossible to indicate who lost or damaged. Now it is very different. The adoption of the "lamp for life" concept shares responsibility with individuals, so that the miner's lamp holder is the owner of the miner's lamp. The connection between the ID code of the miner and the ID code of the miner's lamp label will enable the assigned equipment owner to be responsible for the loss or damage of the equipment. As with the initial stage of any important technology, the training of the staff is successful in RFID configuration. Key factor. Once the correct technology is determined, personnel are trained to accept the system. Will be an important challenge. Although some miners are skeptical about the new system and see it as an assessment mechanism for them, the benefits of the RFID system are very clear to the mine owners. It improves the safety mechanism of mine operators. It optimizes the cost-effectiveness of equipment maintenance management and, more importantly, controls the loss of equipment and makes it possible to manage equipment usage more accurately.
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