CAJ | 학술논문

巷道内金属锚杆、锚网、大型机电设备等因素影响了瞬变电磁的探测效果,为减小这些干扰因素带来的影响,设计了一种超强功率瞬变电磁仪. 该瞬变电磁仪发射机采用PWM控制器为核心处理单元,能通过MCU微处理器预设电流值,确保瞬变电磁仪发射电流保持恒定;采用恒流源的大功率瞬变电磁发射机,其最大发射电流可达500 A,探测效果显著提高;瞬变电磁仪接收机采用双AD设计,利用FPGA控制两个AD采样器,可实现多次叠加压制噪声干扰,提高探测精度.
항도내금속묘간、묘망、대형궤전설비등인소영향료순변전자적탐측효과,위감소저사간우인소대래적영향,설계료일충초강공솔순변전자의. 해순변전자의발사궤채용PWM공제기위핵심처리단원,능통과MCU미처리기예설전류치,학보순변전자의발사전류보지항정;채용항류원적대공솔순변전자발사궤,기최대발사전류가체500 A,탐측효과현저제고;순변전자의접수궤채용쌍AD설계,이용FPGA공제량개AD채양기,가실현다차첩가압제조성간우,제고탐측정도.
The metal rock-bolts, anchor nets, large mechanical and electrical equipment and other factors will affect the detection effect of the transient electromagnetic instrument, for this purpose, a superpower transient electromagnetic instrument was designed in order to reduce the influence of these interference factors. The transmitter of this instrument adopts PWM controller as the core processing unit and can pre-set the current value with MCU microprocessor so as to ensure the transmitting current of the instrument to keep constant. The maximum transmitting current of the high-power transient electromagnetic transmitter with constant current source can reach 500 A, which significantly improvd the detection effect of the instrument;AD design was adopted for the receiver of the transient electromagnetic transmitter, FPGA was used to control two AD samplers, this can realize multiple superimposition, suppress the noise interference and improve the detection accuracy.