Embedded Programmable Strain Gauge Is Developed

Bridge transducer signal conditioners from domestic manufacturers are non-programmable, so those products are out of date for they can't join in computerized measurement and control system. Some foreign manufacturers the programmable instruments, but its price is too high. In addition, the programmable bridge transducer signal conditioner available in market is controlled via communication cables, which limits its application. With the background stated above, we set out to pilot a kind of cost-effective programmable bridge transducer signal conditioner with wireless technology, which extends it's application. The research and development is divided into two sections. First, operation is implemented with a serial communication cable between master computer and slave MCU. Second, Bluetooth module take the place of the serial communication cable. Most efforts are involved in the first section in this paper.The idea of dispatching comes from operation system during the process of developing slave MCU software. MCU software development is not the same as the traditional foreground and background system, different task has different priority, which enhances the system's real-time performance.