Water pump dry-run detection method and system
AssigneeTsann Kuen (Zhangzhou) Enterprise Co., Ltd.
InventorsYafei HAN, Huizhen Huang
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Abstract
The present invention relates to a water pump dry-run detection method and system, where the method includes: converting an operating current signal of a water pump into a voltage signal; collecting, at a frequency, a voltage signal value output by the voltage-current conversion module within one pulse cycle of the water pump in a dry-run state to obtain a first determined threshold corresponding to the dry-run state; calculating determined data at a current time point based on a voltage signal value of the water pump during use within the pulse cycle; and determining, based on a magnitude relationship between the determined data and a first determined threshold, whether the water pump is in the dry-run state.
Claims12
A water pump dry-run detection method, comprising the following steps:
- adding a voltage-current conversion module to a water pump control circuit to convert an operating current signal of a water pump into a voltage signal;
- collecting, at a frequency, a voltage signal value output by the voltage-current conversion module within one pulse cycle of the water pump in a dry-run state;
- extracting, based on a preset time range (Δt) from the voltage signal values collected during the dry-run state, a voltage signal value corresponding to each sampling time point within the preset time range (Δt), and obtaining a first determined threshold (Q2) corresponding to the dry-run state based on an integral of all the extracted voltage signal values within the preset time range (Δt);
- during operation of the water pump, continuously collecting, at a same frequency, voltage signal values output by the voltage-current conversion module, after voltage signal values within one pulse cycle are collected, extracting a voltage signal value corresponding to each sampling time point within the preset time range (Δt) from the voltage signal values within the one pulse cycle, and then obtaining determined data (Q) at a current time point based on an integral of all the extracted voltage signal values within the preset time range (Δt);
- and
- determining, based on a magnitude relationship between the determined data (Q) and the first determined threshold (Q2), whether the water pump is in the dry-run state.
A water pump dry-run detection system, comprising a water pump control circuit and a controller, wherein the water pump dry-run detection system collects a voltage signal value output by a voltage-current conversion module through the controller, and implements the following steps:
- collecting, at a frequency, a voltage signal value output by the voltage-current conversion module within one pulse cycle of a water pump in a dry-run state;
- extracting, based on a preset time range (Δt) from the voltage signal values collected during the dry-run state, a voltage signal value corresponding to each sampling time point within the preset time range (Δt), and obtaining a first determined threshold (Q2) corresponding to the dry-run state based on an integral of all the extracted voltage signal values within the preset time range (Δt);
- during operation of the water pump, continuously collecting, at a same frequency, voltage signal values output by the voltage-current conversion module, after voltage signal values within one pulse cycle are collected, extracting a voltage signal value corresponding to each sampling time point within the preset time range (Δt) from the voltage signal values within the one pulse cycle, and then obtaining determined data (Q) at a current time point based on an integral of all the extracted voltage signal values within the preset time range (Δt);
- and
- determining, based on a magnitude relationship between the determined data (Q) and a first determined threshold (Q2), whether the water pump is in the dry-run state.
Dependencies are inferred from the claim text.