Suitable for Cummins pressure sensor engine parts 3408589

1.kind

There are many kinds of mechanical sensors, such as resistance strain gauge pressure sensor, semiconductor strain gauge pressure sensor, piezoresistive pressure sensor, inductive pressure sensor, capacitive pressure sensor, resonant pressure sensor and capacitive acceleration sensor. But the most widely used is piezoresistive pressure sensor, which has extremely low price, high accuracy and good linear characteristics.

2.pivotal role

Pressure sensors are not only widely used in production measurement, but also often seen in our lives nowadays. Most of our vehicles have pressure sensors. Perhaps most people know that there are pressure sensors in cars, but in fact, there are also pressure sensors on ordinary motorcycles.

The power of motorcycle comes from the combustion of oil in the cylinder of gasoline engine. Only full combustion can provide good power, and good combustion must have three conditions: good mixture, full compression and optimal ignition. Whether the EFI system can correctly control the air-fuel ratio within the required range determines the power, economy and emission index of the engine. The control of air-fuel ratio of gasoline engine is realized by adjusting the fuel supply matching with the intake air volume, so the measurement accuracy of intake air flow directly affects the control accuracy of air-fuel ratio.

3.inner structure

It consists of matrix material, metal strain wire or strain foil, insulation protection sheet and lead-out wire. According to different uses, the resistance value of the resistance strain gauge can be designed by the designer, but the range of resistance value should be paid attention to: the resistance value is too small, and the required driving current is too large. At the same time, the heat of the strain gauge causes its own temperature to be too high. When used in different environments, the resistance value of the strain gauge changes too much, the output zero drift is obvious, and the zero adjustment circuit is too complicated. However, the resistance is too large, the impedance is too high, and the ability to resist external electromagnetic interference is poor. Generally, it is about tens of euros to tens of thousands of euros.