Research and Design of Internet of Things Sensing System for Waterway Leakage of
Hemodialysis Machine
CHEN Xingyong1, LOU Liangliang2, ZHANG Yikai1
1. Department of Medical Equipment, Taizhou First People’s Hospital, Taizhou Zhejiang 318020, China;
2. School of Electronics and Information Engineering, Taizhou University, Taizhou Zhejiang 318020, China
Abstract：Objective To solve the problem of frequent machine failure caused by waterway leakage under high-frequency operation
of hemodialysis machine, to construct an online sensing system for leakage detection. Methods The system used the micro-resistance
characteristics of the leakage liquids to form a resistive leakage detection sensor, as well as a set of detection algorithm. Then, the
algorithm was validated using the ESP32 as the carrier, the mac hines were connected to the network and the data was collected to
the Cloud, so as to achieve the purpose of accurate alarm for minor leakage in hemodialysis machines. To evaluate the performance
of the sensing system, experiments were conducted on three common leakage liquids (dialysis mixture, disinfectant, and reverse
osmosis water) in hemodialysis machines, and the detection accuracy of the algorithm was verified. Results The corresponding
hardware main control module was constructed based on ESP32-DevKitC core board. The detection of common leakage liquids
was realized by implanting algorithm. When the permeable liquid touched the leakage sensor, the voltage output by the sensor
jumped and continued to decrease. In addition, the standard deviation data characteristics of voltage jump signals were related to
the solution properties, and the jump amplitude of the dialysis mixture and disinfectant was significantly larger than that of reverse
osmosis water. By setting corresponding thresholds, the robustness of the sensing system was improved, and the detection accuracy
of the sensing system reached 100% for all the three common leakage liquids (dialysis mixture, disinfectant, and reverse osmosis
water). Conclusion The sensing system can provide theoretical support for pre-warning, in-process disposal and post-analysis of
hemodialysis machine failures, and help improve the timeliness for the maintenance of hemodialysis machine in hospital, which has
high practical value and application significance.
陈星勇1，楼亮亮2，章逸恺1. 面向血透机水路渗漏的物联网感知
系统研究与设计[J]. 中国医疗设备, 2023, 38(10): 38-43.
CHEN Xingyong1, LOU Liangliang2, ZHANG Yikai1. Research and Design of Internet of Things Sensing System for Waterway Leakage of
Hemodialysis Machine. China Medical Devices, 2023, 38(10): 38-43.
