Field of Dreams A Testing Tool for Electronic Detonator Blasting System
Electronic detonators are increasingly being used in the last few years. Electronic detonators offer several distinctive features over electric and non-el (shock tube) detonators, including better timing accuracy resulting in improved fragmentation and vibration or noise control. The field programmability also helps in reducing the on-site magazine storage of detonators where conventional non-electric and electric detonators are manufactured with diverse fixed delays. Among the various electronic detonator system available today is the Special Devices, Inc. (SDI) Electronic Detonator Blasting System which contains a patented robust serial protocol and field reliable hardware exhibiting greater ease in field usability and deployment. The nucleus of this system is the Electronic Ignition Module (EIM), that contains a mixed signal ASIC, together with supporting electronics and bridge wire initiator. Programmable delay times with increments of lms up to 10s is possible with excellent timing accuracy. Lead line bus lengths of up to 2 km containing 1600 ElMs can be utilized. One of the most important tools in SDIs technology arsenal is the testing array, nicknamed Field of Dreams (FOD). It involves the use of up to 1600 EIMs sorted into 16 panels of 100 EIMs each which simulates a branch, containing lumped discrete RLC components to simulate actual field wire conditions and leakage. Various field conditions can be judiciously modeled using this arrangement e.g. number of detonators/EIMs on the bus, number of branches, wire diameter, and length,by choosing the appropriate RLC lumped components. Leakage, always a bete noire in electronic blasting, can be modeled by placing resistors in strategic locations across the FOD array. Various configurations, consisting of the number of EIMs, leakage magnitude, static or dynamic leakage, and position of leakage points, have been studied. Various time dependent leakage or intermittent leakage, were induced to demonstrate that communications was not impaired at all. SPICE (Simulation Program with Integrated Circuit Emphasis) simulation was previously performed, especially the modeling of the analog and digital levels, and a good correlation was found between the SPICE simulations and measurements in the FOD test array. To date, extensive FOD lab testing has been performed whereby over 15 million simulated firing cycles have occurred without incident, involving numerous sets of EIMs.
electronic detonators blasting system testing tool electronic ignition module initiators timing accuracy
G.Teowee
Special Devices, Inc., 14370 White Sage Road Moorpark, CA 93021
国际会议
The Second Asian-Pacific Symposium on Blasting Techniques(第二届亚太地区爆破技术研讨会)
大连
英文
358-362
2009-07-01（万方平台首次上网日期，不代表论文的发表时间）