The oil pressure sensor mainly prevents blade overload and breakage through real-time monitoring, feedback control, and alarm, as follows:

-Real time pressure monitoring:oil pressure sensorInstalled in key parts of the hydraulic system related to the blades, such as the inlet and outlet of the pitch hydraulic cylinder. It can monitor the oil pressure changes in the hydraulic system in real-time with high precision. For example, the HYDAC pressure sensor of Hedeke adopts diffusion silicon piezoresistive technology, with an accuracy of ± 0.25% FS. By continuously monitoring the oil pressure, the sensor can capture subtle fluctuations in the oil pressure, reflecting the load situation borne by the blades.

-Overload signal feedback: The oil pressure sensor converts the monitored oil pressure signal into an electrical signal and transmits it to the control system. The control system will compare the received electrical signal with a pre-set threshold. When the oil pressure exceeds the set overload threshold, it indicates that the blades may have been subjected to excessive load, and the control system will immediately take corresponding measures.

-Control blade angle: In some wind power generation systems, oil pressure sensors are combined with pitch control systems. When the sensor detects abnormal oil pressure, indicating that the blades may be overloaded, the signal will be fed back to the pitch controller. The pitch controller dynamically adjusts the opening of the hydraulic valve based on this signal, thereby changing the windward angle of the blades, reducing the aerodynamic load on the blades, and avoiding blade breakage due to overload. For example, when the wind speed exceeds the rated value, adjusting the blade angle to make the blades pitch to a certain angle can reduce the pressure on the blades.

-Alarm and protection mechanism: When the oil pressure sensor detects that the oil pressure exceeds the normal range and reaches the overload alarm threshold, in addition to feedback signals to the control system, it may also trigger alarm devices, such as sound or light alarms, to remind operators to pay attention. At the same time, some systems also automatically activate protection mechanisms, such as cutting off the power source of the hydraulic system to stop the movement of the blades, to prevent further deterioration of the overload situation and protect the blades from being broken.

-Multi parameter fusion analysis: partially advancedoil pressure sensorThe system will combine other parameters for comprehensive analysis, such as oil temperature, oil contamination level, etc. By integrating and analyzing these parameters, the working status and overload risk of the blades can be more accurately determined. For example, when the oil temperature rises abnormally and the oil pressure fluctuates, it may indicate that there is an abnormality in the hydraulic system, and measures need to be taken in a timely manner to indirectly protect the blades from overload damage.

-Redundancy design: In order to improve the reliability of the system, some sensors adopt redundancy design, that is, installing multiple sensors or adopting dual channel design. When a sensor or channel fails, the backup sensor or channel can continue to work, ensuring timely and accurate monitoring of oil pressure and preventing blade overload and breakage caused by sensor failure.