2011年4月6日 星期三

How to work the pressure sensors? -Important information on these devices is vital


This article offers some vital information to answer the question about "how pressure sensors work?" It also provided data on possible applications of pressure transducers. There are many applications of these devices, especially in the industrial setting, although they are also useful in monitoring the pressure in the tyres of cars. A common design for them, such as pressure sensors Keller, is one that makes use of Piezoresistive materials. These materials have the unusual feature that changes resistance correspondingly by force or pressure that is applied on them. These materials are the key element of the sensors, which is the sensing diaphragm. This diaphragm is designed so that its movement depends on the amount of pressure is applied. However, it is also common for people to investigate "as pressure sensors work?," because they realize that part of the systems to continuously monitor the pressure of the tyres.

For those who are inquiring "how pressure sensors work?" and I am also interested on mechanisms of tire pressure sensor, this is a type of technology that is designed for security. Warning to the driver in case of a low pressure. This type of system (TPMS) tire pressure monitoring was tasked by the National Highway Traffic Safety Administration for all vehicles that are sold after 2008. There are two categories for the TPM and these are the direct and indirect systems. The direct TPMS has installed for each tyre constantly monitor the pressure of tyre pressure transducers. However the PGT indirect calculates the air pressure in pneumatic measuring the other variables, including the tyre revolution per minute.

Can be of various kinds and include the differential gauge, Piezoresistive, air, digital pressure sensor and absolute vacuum. However, one of the most common projects using Piezoresistive materials, which means that the current is directly proportional to the applied pressure. The material is normally used is semiconductor Silicon. Several thin silicon wafers are placed in between protective materials.

So, how do pressure sensors work when they are applied in particular to ensure that the car tire pressure range correct? Well, there are two fundamental components of direct TPM and these are the radio transmitter for sending information to the computer of the vehicle and the pressure sensor is inserted inside the rim of the tire. Radio transmission is through the antenna of the car, which detects signals and then route them to the central control system. However, the indirect type of TPM, pressure transducers are not needed. The amount of pressure in the tires is estimated by determining the diameter of the tyre. In turn, the diameter of the tyre shall be calculated using the rotation speed as input. If the computer detects a bit faster rotation speed for one of the tires, warns the driver that this particular tire has a low air pressure, because it has a smaller diameter.








To learn more about the function of pressure sensors. Visit review of pressure sensors.


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