, by virtue of yearsSensor TechnologySupport experience, summed up five sensor error types, details are as follows:
Like other devices, sensors can also have errors. To maintain consistency, the error is defined as the difference between the measured value and the true value. Although there is more than one way to divide the possible errors, sensor errors are divided into five basic categories: insertion, application, characteristic, dynamic and environmental errors.
Insertion error (Insertion error) is the error that occurs when a sensor is inserted into the system due to changes in the measurement parameters. Generally, such a problem occurs in electronic measurement, but similar problems also occur in other methods of measurement. For example, if a voltmeter measures voltage in a loop, it must have an inherent impedance that is much larger than the loop impedance, or if there is a loop load, there will be a large error in the reading. This type of error is caused by the use of an error that is too large for the system (e. g., a pressure system).Transmitter; Either the dynamic characteristics of the system are too slow, or the self-heating system is loaded with too much heat energy.
The application error (Application error) is generated by the operator, which also means that there are many reasons for it. For example,TemperatureErrors during measurement, including incorrect placement of the probe or incorrect insulation between the probe and the measurement site. Other application errors include errors made during the purification of air or other gases. Application errors also involve the wrong placement of the transmitter www.cechina.cn, so that positive or negative pressure will affect the correct reading.
Characteristic error is defined as, inherent in the device itself, the difference between the device's ideal, recognized transfer function characteristics and the real characteristics. Such errors include DC drift values (e. g., falsePressurehead), incorrect slope or non-linear slope.
Dynamic error (Dynamic error). Many sensors are characterized and calibrated under static conditions, which means that the input parameters used are static or similar to static. Many sensors have strong damping, so they do not respond quickly to changes in input parameters. For example, a thermistor takes several seconds to respond to a step change in temperature. Therefore, the thermistor does not immediately jump to a new impedance, or produce a sudden change. Instead, it is slowly changing to the new value. ThusCopyright Control Engineering NetworkIf a sensor with a delay characteristic responds to rapid changes in temperature, the output waveform will be distorted because it contains dynamic errors. The factors that cause dynamic error are response time, amplitude distortion and phase distortion.
The environmental error (Environmental error) comes from the environment in which the sensor is used. Factors include temperature, or oscillation, vibration, altitude,Chemistrysubstance volatilization or other factors. These often affect the characteristics of the sensor, so in practical applications, these factors are always classified together.

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