Authors

Abstract

The measurement and control system of Eriocheir sinensis, the Chinese mitten crab, could increase its survival rate and quality effectively. Based on the analysis and design of the system, the parameter ranges for major factors of water quality during crab breeding process were determined. Sensors of pH, dissolved oxygen (DO), and temperature were used to detect the value of pH, DO, and temperature. LabVIEW, a virtual instrument technology, was used to monitor water quality parameters during crab breeding process, thereby controlling the relay of inlet valve, water valve and oxygen valve by comparing the actual figures with normal parameter. This technology was used to perform the adjustment of water quality parameters respectively to achieve automatic control. In order to test the performance of the system, the monitoring time, stocking density and planting density were taken as experiment factors, and the error rate of the monitoring index was taken as evaluation index. The verification experiment results show that pH, DO and temperature monitoring errors were less than 10%, under the maximum constraint conditions of experiment factors, which meet the design requirements.

Abstract in Chinese

采用中华绒螯蟹养殖控制室系统可有效提高其成活率和品质。本文在研究一种培育中华绒螯蟹苗的实时监控系统的基础上，确定了中华绒螯蟹养殖过程中主要水质因素的参数范围。采用pH传感器、溶解氧传感器、温度传感器对这些水质参数进行检测。利用LabVIEW虚拟仪器技术对养殖过程中的水质参数进行监测，将实际数据与正常参数进行对比，控制进水阀、进水阀和氧气阀的继电器。利用该技术分别对水质参数进行调整，实现自动控制。为测试系统工作性能，以监测时间、放养密度和种植密度为试验因素，以监测指标的误差率为评价指标，采用三元二次回归正交旋转组合试验方法进行试验与响应面分析。验证试验得出，监测时间、放养密度、种植密度均保持约束最大条件下， pH、DO、温度监测误差均小于10%，满足设计要求。