Pressure sensor noise?

In the course of using the pressure sensor in the noise, the noise of the reason for that? Only clear reason, noise can effectively solve the noise problem! Conclusion noise causes are as follows: 1, for the low-frequency noise of pressure sensor is mainly due to the conductive particles appear discontinuous internal. Especially for carbon film resistor, it exist within the carbonaceous materials tend to a lot of small particles, particles are discrete, the current flows through the period, makes the conductivity of the resistance change caused the change of the current, produce similar steam arc of contact is not good. 2, for shot noise produced by the semiconductor devices, mainly due to the semiconductor PN junction barrier on both ends of voltage change caused the number of charge accumulation in this area, so as to reveal the capacitance effect. When the positive electricity reduce hours, it make the electrons and holes after depletion region, proportionate to the capacitor discharge. 3, when coupled with reverse voltage, exhausted area change instead. When current flows through the barrier zone, this change will cause the electric current flows through the potential barrier to produce small fluctuations, resulting in a current noise. General electromagnetic components on printed circuit boards in the pressure sensor, if the disturbance many circuit boards have relay, the coil electromagnetic components, such as the electricity flowing smoothly expired its distributed capacitance of the inductance of the coil and the shell near the radiation energy, the energy will have interference on the nearby circuit. 4, like relay element such as the repeated work, reverse voltage of power would produce instant form the instantaneous surge current, the instantaneous high pressure will have great impact on circuit, thus the normal work of a serious interference circuit. More about how to deal with the pressure sensor noise problem please call 15312451261/0512 - Contact us 55291586, focused on automation instrumentation detection control.