中文摘要：

为实现型砂品质的远程在线监测，研制了以STM32和无线HART为核心的型砂质量测试仪。设计了监测型砂含水量、透气性和湿压强度等参数的模块化电路，以便于兼容多种湿砂型铸造系统和设备，实时掌握碾砂质量，优化型砂组分和性能，提高铸造成品率。校准试验表明，监测仪效率高、功能丰富，经校准后能达到较高的测试精度。

英文摘要：

To realize remote on-line monitoring on green sand quality, a sand quality meter was developed with STM32 and wireless HART. Modular circuits for water content, permeability and green compression strength were designed to facilitate compatibility with a variety of green sand casting systems and equipments, real-time optimize composition and performance of sand, and improve casting yield. Calibration tests show that the meter has high efficient and feature-rich, and high test accuracy can be achieved after calibrated.