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Use Telemetry to Measure Pressure and Temperature

October 4, 2015 by Sunil G Leave a Comment

If you want an accurate measurement of temperature and air pressure, you can depend upon the telemetry services. The reliable and portable devices help in automotive applications through wireless services.

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Sensor Formation: The sensor structure of the telemetry device is composed of capacitor and coils of inductors which remains fabricated on glass surface. The top portion of the capacitor is covered with silicon of 5 um square. For measuring the temperature and pressure, fabrication process is required which can be started right from the silicon and water surface. This process creates a gap between electrodes of two different capacitors. You can observe a thin layer of aluminum film which is patterned and evaporates through top of electrode.

Electromechanical Investigation: The electromechanical analysis helps in measuring air pressure from the top view and cross section of square plate. With the help of small theory of deflection plate equations are measured and by solving the simple equation you will obtain the current air pressure of the environment.

TPMS Design:  Air pressure and temperature can also be measured through TPMS mobile telemetry system.

  • Pressure Dependency: Depending on the size of membrane, gap and deflection, capacitance is able in measuring the air pressure. The deflection system can play a great role by functioning through various parameters like thickness, pressure and membrane length. The small size of gap and thin membrane can produce high pressure sensitivity. The silicon helps in determining the length and thickness of the membrane which must be very small in nature. This particular structure of telemetry helps to function in non contact electrode mode. It signifies that the maximum deflection takes place through the plates under the full range of pressure. It should always be kept in mind that the gap size between two plates should be very small.
  • Temperature Dependency: While measuring the temperature, the resistivity of the metal must be constant in nature. The value of the resistance can be a dependent parameter with relation to frequency. The temperature can be measured by keeping the pressure constant with the resonant frequency. You can take note of pressure sensitivity and the temperature sensitivity by changing one parameter or the other.

Micromachines: Pressure sensors in telemetry can be controlled through micro machines with the help of fabrication process. Sensors are usually composed of two different substrates, where one silicon layer is of diaphragm structure and the other is of glass structure. Fabricated sensors can work well through external assembling process with anodic bonding. The diaphragm helps in removing the unnecessary residuals and therefore increases the sensitivity. When the sensors remain sealed with anodic bonding, it improves the performance. As you can observe air vents in the sensor cavity of atmospheric pressure, you can fill up the vents through epoxy. This method particularly is known as the inductive coupling. The sensors remain electroplated with glass substrates and produces self inductance.

Resonance Frequency: If the magnetic field suits the resonance frequency of the sensor, external coils will change drastically and help in the accurate measurement of air pressure and temperature. Pressure can thus be calculated by measuring the amplitude peaks with same phase and frequency. Generally the external coil decreases drastically from 90 degrees to the resonance frequency. The peak frequency can act as an accurate determinant of temperature and pressure.

It has been proved through various experiments that the mobile telemetry services can really be helpful in determining weather reports by measuring the temperature and air pressure in different locations. Traditionally, various monitoring devices have been discovered and used, but this new technology of telemetry will definitely make you notice the improvements and accuracies.

Author Bio: Tom Peterson is a well-known mobile telemetry analyst. In this article he is sharing the advantages of using the telemetry system to measure air pressure and temperature.

Filed Under: Food & Health

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