外文翻譯----傳感器和傳感器激勵(lì)和測(cè)量技術(shù)-文庫吧資料
2025-01-23 23:06本頁面
【正文】 hod, in addition to the need to consider system cost. As a result of a variety of integration options and pensation technology, design engineers can design requirements according to different methods of selecting appropriate.附錄B傳感器和傳感器激勵(lì)和測(cè)量技術(shù)當(dāng)今的許多工業(yè)和儀器儀表應(yīng)用都涉及傳感器測(cè)量。Some applications require the pressure in the whole range of high accuracy. In these applications, can be used multipoint calibration method to get the best results. In multipoint calibration method, not only considered the error of offset and sensitivity, but also takes into account most of the linear error curve shown in purple. The mathematical model used here, with each calibration interval (between the two reference points) exactly the same as a twotier calibration. s response to the 12 bit, 1 MSPS ADC。 In addition, capacitive sensors or sensor sensibility in the medical devices used to measure blood flow or blood pressure or blood qualitative analysis. In order to use these plex impedance sensors, the realization of measurement, to provide an exchange of (AC) excitation source frequency in the frequency range of the sensor for scanning. This article attempts to explain how the use of singlechip digital waveform generator to easily achieve this up to 10 MHz frequency scanning. Also introduced a kind of integrated incentive, response and digital signal processor (DSP) features a plete singlechip sensor solution that suited the requirements of up to nearly 50 kHz frequency applications. Sensors: working principle.Inspired by the frequency of sensor signals based on sensor values of L or C to show the corresponding instantaneous magnitude, frequency or phase changes. For example, the ultrasound will show a flow of phase offset, while the proximity sensor will cause the rate to change. Tracking changes in impedance that is the most monly used to monitor the resonant frequency circuit. Capacitance value of the resonant frequency is equal to the frequency where the inductance value point. This is also the largest frequency curve frequency impedance value of the corresponding point. Under normal circumstances, for example, in static conditions, the sensor L, R and C has a unique value, in the resonant frequency impedance to Department with the greatest value. When a moving object near the sensor, then sensor L and C values will be changed and a new resonant frequency. By monitoring the changes in resonant frequency (and thus lead to changes in impedance), it is possible to speculate that the relative movement of objects moving away from the sensor.Calculated resonant frequency: calculation circuit measuring the resonant frequency of the need for the relationship between frequency and impedance, in particular, need a certain frequency range with the ability to scan the waveform generator. A simple, lowcost method is based on the AD5930 waveform generator. AD5930 with a group of preset in the frequency range of the ability to provide a linear scan. Once the conditions for setting, on the need for further control, in addition to a frequency scan for the start of the trigger. AD5930 has many advantages: the output frequency resolution of 28 bit, so you can be less than the control accuracy of Hz output frequency. The output frequency range of 0 ~ 10 MHz, thus the selection of sensors with a lot of flexibility. For example, some sensors a very narrow frequen
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