Research and Application of Digital Transmission of Differential Resistance Sensor

【摘要】：By analyzing different resistance values, this collector of this article collects signal of the Differential Resistance Sensor (DRS) acquisition embedded in the dams, reservoirs and other hydraulic buildings, and monitors the facilities in real time view. The position of embedded sensors can be distinguished by setting the address and code. The analog signal is one-on-one converted to digital signals through high-precision analog-to-digital conversion and amplification chips by digitized transducers. The digital signals are transported to the central server, and the deformation of the structure is estimated by original data in the server. Meanwhile, it extended the transformer's effective measuring distance from normal analog 200 meters up to digitalized 1200 meters. In situation of multi DRS installed field, all the output of the transformers can be connected in parallel to eliminate the cables to only one RS485-Bus as a twisted-pair cable and a power line. It has been proved from the applications in several reservoir dam security monitoring systems that this transducer is a highly accurate, reliable, strong anti-interference solution for all the DRS applications of the relative monitoring and measurement projects. The collector has been applied in dam monitoring system with remarkable performance.