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Outline
Aiming at the problems of limited accuracy，high cost and poor real‑time performance of traditional centrifugal pump test systems，an automated test system based on Siemens S7-1500 PLC and the .NET platform was designed.The system employed high‑precision sensors and PID closed‑loop control，Breaking through the middleware limitations of traditional commercial configuration software，the system utilizes an underlying asynchronous Socket mechanism based on TCP/IP to directly interact with the PLC for lightweight data exchange，achieving a communication delay of ≤50 ms.Taking a centrifugal pump with a rated speed of 894 r/min，rated flow of 1 090 m³/h，and rated power of 221 kW as an example，the system underwent experimental validation.The results demonstrate that measurement uncertainties of all key performance parameters of the system meet Class 1 accuracy in GB/T 3216—2016.The measurement uncertainties for flow rate，head，power，rotational speed，and efficiency are ±1.06%，±1.20%，±0.91%，±0.19%，and ±1.79% respectively，all falling below their permissible limits （±2.0%，±1.5%，±1.5%，±0.5%，±2.9%）.Leveraging the .NET open‑source ecosystem and modular design，it significantly reduces development and maintenance costs Furthermore，through a dependency injection （DI） decoupled design，it provides underlying architectural support for intelligent expansions，such as the native integration of ML.NET machine learning algorithms.This system combines the advantages of high precision，low latency，low cost，ease of operation，and strong scalability.This research offers a reliable integrated solution for high‑precision，low‑cost automated test of industrial pumps.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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