Methods of preventing overload of pressure sensor
Methods of preventing overload of pressure sensor
Pressure sensor to prevent overload method is as follows:
Hardware design level
Reasonable selection
According to the pressure range of the actual application scene, the pressure sensor with adaptive range is selected. For example, in the industrial pipeline pressure monitoring scene, if the normal working pressure of the pipeline is 0-10MPa, considering the possible inter-pressure fluctuation, the sensor with a measuring range of at least 15MPa should be selected, and sufficient margin should be reserved to prevent the pressure from approaching or exceeding the upper limit of the sensor measuring range under normal working conditions.
Adopt overload protection structure
Some pressure sensors are equipped with built-in overload protection structures, such as bellows pressure sensors. With the help of specially designed bellows structure, when the pressure exceeds the rated range, the bellows will be deformed without being damaged, so as to limit the further transmission of pressure to sensitive elements and protect the core components of the sensor. There are also some sensors that combine elastic elements with buffer structure. When the pressure is overloaded, the buffer structure takes the lead in bearing part of the pressure to alleviate the impact on sensitive elements.
Installation operation level
Correct installation position Ensure that the pressure sensor is installed at a place where the pressure is stable and there is no impact source. Take the hydraulic system as an example, it is not necessary to install the sensor directly near the pump outlet, where the lifting force is not strong, and the location where the pipeline is relatively flat at a certain distance from the pump outlet should be selected to reduce the high lighting.
The influence of the sensor
Avoid misoperation，During installation and maintenance, strictly follow the operation manual. For example, when connecting the pipeline with the sensor, do not over-tighten the connecting nut to prevent the internal structure of the sensor from being damaged due to excessive mechanical stress, which will indirectly affect its pressure tolerance. In the process of starting and stopping the equipment, the mold should be slowly molded to prevent the pressure from suddenly changing greatly and impacting the sensor.
Monitoring and protection level
Set the upper pressure alarm
In the control system, a reasonable pressure eye alarm value is set for the pressure sensor. When the sensor detects that Leroy is connected or reaches the alarm value, the control system immediately gives an alarm, prompting the operator to take measures to adjust the valve opening, reduce the running power of the bar, and prevent Leroy from continuing. Rising causes overload. Install safety valve A safety valve is added to the pressure system as an extra protection.
When the pressure rises abnormally and exceeds the set pressure of the safety valve, the safety valve automatically opens to release the pressure, so as to control the system pressure in a safe range and prevent the pressure sensor from bearing too high pressure.
For example, in the steam boiler system, the safety valve and pressure Force sensors work together to ensure the safe operation of the system. Regular calibration and maintenance Regularly calibrate and maintain the pressure sensor to ensure its measurement accuracy. Through calibration, whether the performance of the sensor is degraded or not can be timely noticed.
If it is abnormal, it can be replaced or repaired in advance, so as to avoid inaccurate pressure monitoring due to the sensor's own performance problems, which will lead to overload risk. Jiangxi SOP Precision Intelligent Technology Co., Ltd. is a manufacturer specializing in the production of high-quality and high-precision force sensors. Its main products include linear displacement sensors, S-type weighing sensors, cantilever weighing sensors, ring weighing sensors, column weighing sensors, multi-axis force sensors, torque sensors, micro-displacement sensors, pressure sensors, transmitters/amplifiers, control instruments, hand-held instruments and other force control products, and it has obtained many national patents.