Rogowski coil induction voltage is very small, and sometimes only a little or less. After the back of the circuit and other parts of the signal, the signal will almost decay to close to zero, and become very susceptible to external interference and distortion, which resulting in the back of the measurement circuit is difficult to measure the bus current value. So consider the integral link and Rogowski coil between the operational circuit to solve the above problems, while the integral part of

more »

... he use of digital integrator. The high-pressure sensing unit is located in the high-side side and is normally installed outdoors. The high-end sensing unit must be as simple as possible in order to meet its safety and reliability and ease of maintenance. The current microelectronics technology development, making it possible to design a technical solution to meet the demand.