To improve precision of torque measurement in monitoring and control applications

a high-precision torque measurement design scheme based on STM32 is proposed. First

output signal of torque sensor is sent to ADS1255 which is a 24 bit

high-precision

built-in PGA

Σ-Δ A / D converter after low-pass filtering. Then

the master controller STM32 reads A / D conversion result by SPI and calculates the torque values by moving weighted average filtering algorithm to eliminate random noise. Finally

these values can be stored in an external Flash memory and be send to LCD to display in real-time. Site measuremental result indicates that precision of system reaches 0. 6 % F. S..