外文翻譯----傳感器和傳感器激勵和測量技術(shù)(編輯修改稿)
2025-02-13 23:06 本頁面
【文章內(nèi)容簡介】 s greatly reduce the processing power of the final requirements.Without calibration of the system as a result can only use the typical value of sensitivity and offset the output voltage is converted to pressure, the pressure measured will have a margin of error as shown in Figure . This initial error without calibration by the following ponents: error: As the pressure in the entire range of vertical shift to maintain a constant, so the proliferation and laser conditioning converter changes the amendment would have offset error. sensitivity of error, resulting in errors in direct proportion to the size and pressure: If the device is higher than the typical value of the sensitivity, the sensitivity of the error will be incremental pressure function (see Figure 1). If the sensitivity is lower than the typical value, then the sensitivity of the error will be decreasing function of pressure. The cause of the error diffusion process is to change. Error: This is an initial error factor less affected, the error is the cause of the physical nonlinear silicon, but with the sensor amplifier, should also include nonlinear amplifier. Linear error curve can be concave curve, it could be a convex curve. Error: In most cases, the lag error can be ignored pletely, because silicon has a higher degree of mechanical stiffness. Changes in general just a lot of pressure to consider the case of hysteresis error.Calibration can eliminate or greatly reduce these errors, and pensation technique is usually required to identify the parameters of the actual transfer function, rather than simply the use of typical values. Potentiometer, adjustable resistance, and other hardware can be used in the pensation process, while the software is able to achieve more flexibility in the work of this error pensation. Calibration method that can eliminate the transfer function against the Agency to pensate the offset drift error, such as the autozero calibration method. Offset zero calibration is usually carried out under pressure, especially in the differential sensor, because under the conditions of the nominal differential pressure is usually 0. For pure sensor offset calibration will be difficult, because it either needs to read a pressure system to measure the atmospheric pressure in the environment under the conditions of the calibration of pressure or need to obtain the pressure of expectations of the pressure controller. Zero differential pressure sensor is very accurate calibration, because the pressure of strict demarcation is 0. On the other hand, the pressure of 0:00 is not the accuracy of the calibration depends on the pressure controller or the performance measurement system. Calibration is very important selection pressure, which determines the accuracy to obtain the best pressure range. In fact, after calibration offset actual standard fixedpoint error in the Department and has been to maintain a smaller minimum value. Therefore, the reference points must be in accordance with the scope of the target selection pressure, and pressure range can not be consistent with the scope of work. In order to convert the pressure of the output voltage value, usually as a result of the actual sensitivity is unknown, and therefore the mathematical model used for a typical singlepoint calibration sensitivity. Said that the red curve calibration offset (PCAL = 0) after the error curve, the err
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