Way to increase the sensor performance

Sensor is a kind of testing instrument is commonly used in daily life, in a number of areas of has a certain application, People's Daily life is inseparable from the sensor. The performance of the sensor is very important for users, new sensor can of course is the higher the better. Users are always asking what method can improve the performance of the sensor? Engineering is to solve the problem for you today, as an introduction to increase the performance of sensor.

zero method

zero method refers to the amount is measured with standard compare to, when to reach equilibrium, the instrument null, at this point is equal to the amount of specification is measured. Mechanical balance is a typical example.

closed loop technology

application closed-loop system consisting of a negative reaction, can make the system widen the bandwidth, increase the dynamic range, progress flexibility and resolution, stability, repeatability and solid progress. Sensor is too complex, the compensation and correction techniques are sometimes used a certain technical measures is still difficult to satisfy the request, or can satisfy the request, but because of the cost is too high or too complex and has no practical significance. This is to be able to find out the direction of the error and numerical, fixed way to compensate or correction. For example, nonlinear, temperature difference and other commonly used the method.

compensation and correction, to application of electronic technology through the line to deal with, also can accomplish through software by single chip microcomputer. The application of the latter is more and more common.

differential method

differential method is based on the zero method to carry out, because of the zero method request is complete equal amount of measurement and specification, therefore the request specification is continuous variable, it is often not easy to do. But if the specification and measurement difference reduce to a certain level, the reverend mother because they cancel each other out effect, can make the indicator instrument error influence greatly weakened, this is the principle of error method. This way because of the continuous adjustable amount of not requirements specification, and may have direct reading glass tube liquid level meter on indicating instrument values, thus widely application.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor