【正文】 filter for vibration signal through, filter out some highfrequency interference . The simplest lowpass filter formed by capacitors and resistors, shown in Figure, A simple RC lowpass circuit, the general call it passive lowpass filter.The lowpass filter Figure 43 shows the RC lowpass filter circuit, the voltage loop equation: Its gain The availability of the actual gain of Gain value is a function of frequency in the low frequency area Minimal， Signal pass。 ADS8361 The CS pin is the chip select terminal, Ml,M0, A0 pin used to select the sample channel and data channel。s central controller to control data acquisition from the SCM Uh2 and various I / O port for munication between and, through the USB interface Uh2 collected from the microcontroller to the data upload to the PC, for processing and analysis。機(jī)械和設(shè)備。旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)輸出正弦信號(hào)，使傳感器的動(dòng)態(tài)特性，用來(lái)表示頻率響應(yīng)。?1kHz時(shí)，沒(méi)有特殊的前置放大器，安裝使用方便。然后，配合二次儀表，這表明，振動(dòng)速度或位移大小量。 10 176。帶阻性能和帶通濾波器是相反的特定頻段信號(hào)的范圍內(nèi)，也就是說(shuō)，被阻止，在通帶外的信號(hào)。③高輸入阻抗，低輸出阻抗④低漂移，低噪聲。 ADC的單元設(shè)計(jì)與實(shí)現(xiàn)1 .選擇模擬 數(shù)字轉(zhuǎn)換的基本技術(shù)指標(biāo)（1）轉(zhuǎn)換時(shí)間和最高采樣頻率 采樣頻率選擇過(guò)高會(huì)增加的數(shù)據(jù)量，并導(dǎo)致后續(xù)分析和處理的工作量大大增加。在選擇模擬 數(shù)字轉(zhuǎn)換設(shè)備，我們應(yīng)該考慮到這一點(diǎn)，那就是，同時(shí)并行輸入通道，串行輸入的順序2 .ADC單元設(shè)計(jì)（1）ADC芯片的選擇 基于的基本技術(shù)指標(biāo)，數(shù)據(jù)采集的ADS8361芯片的ADC模塊使用系統(tǒng)的模擬 數(shù)字轉(zhuǎn)換上述選擇，ADS8361的是它的ADS8361的生產(chǎn)是一個(gè)雙通道，四路模擬差分輸入，16位A / D轉(zhuǎn)換的精密設(shè)備，它被劃分成兩個(gè)四通道差分輸入連接到一個(gè)獨(dú)立的轉(zhuǎn)換器，可以完成對(duì)收集到的信號(hào)，同時(shí)最高轉(zhuǎn)換率高達(dá)500kHz的工作頻率，這為2μs完成第二個(gè)A / D采樣，采樣后輸出的串行訪問(wèn)的數(shù)據(jù)。 ADS8361的CS引腳的芯片選擇終端，ML，是積極的， M0，A0引腳用于選擇樣品通道和數(shù)據(jù)通道。用戶下載用戶程序中，使用內(nèi)部R / C振蕩器或外部晶振/時(shí)鐘選項(xiàng)。（2）獨(dú)立的電源，減少了外圍設(shè)備的成本 共同使用的串口，并口設(shè)備需要單獨(dú)的供電系統(tǒng)，而USB設(shè)備的USB接口提供了一個(gè)內(nèi)置的電源，不需要。20 / 20。（3）更快，以滿足不同的外設(shè)的要求 性能速度是USB技術(shù)的突出特點(diǎn)之一。 微處理器部分的工作原理：該系統(tǒng)使用一個(gè)主從MCU的設(shè)計(jì)，該系統(tǒng)的中央控制器將遙控器之間的通信數(shù)據(jù)采集的單片機(jī)Uh2和各種I / O端口以進(jìn)行控制，主要微控制器Uh1和，通過(guò)該USB接口Uh2從微控制器收集數(shù)據(jù)上傳到PC機(jī)，進(jìn)行處理和分析。其他七路采集信號(hào)（VB +，VB的），（VC +，VC ），（性病，性?。?，（VE +，VE），（VF +，VF ），（VG +，VG ），（VH，VH ）]收集與第一個(gè)通道實(shí)現(xiàn)8通道振動(dòng)信號(hào)的A / D轉(zhuǎn)換原理相同。此外，ADS8361還提供高速雙串行接口，可以有效地降低了軟件開(kāi)銷，并且功耗非常低，只有150MW。在實(shí)際工作中，一般選擇的，因此可以確定采樣間隔，模擬 數(shù)字轉(zhuǎn)換模塊，必須在采樣間隔T轉(zhuǎn)換完成。 集成電路運(yùn)算放大器組成的模擬電子設(shè)備的高增益，由于價(jià)格低廉靈活和廣泛的應(yīng)用相結(jié)合。根據(jù)奈奎斯特的法律，數(shù)據(jù)采集頻率的數(shù)據(jù)收集設(shè)備必須是大于兩倍的最高頻率的振動(dòng)信號(hào)，信號(hào)可以不發(fā)生的頻率混疊現(xiàn)象，以設(shè)計(jì)為振動(dòng)信號(hào)的低通濾波器，通過(guò)之前，篩選出一些高頻干擾。 振動(dòng)傳感器將非動(dòng)力旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)轉(zhuǎn)換成電信號(hào)，但振動(dòng)信號(hào)疊加在現(xiàn)場(chǎng)無(wú)用噪音，這些噪音和振動(dòng)產(chǎn)生的信號(hào)在同一時(shí)間，一些與振動(dòng)信號(hào)的傳輸過(guò)程中混合，噪音有時(shí)會(huì)大于有用信號(hào)，從而淹沒(méi)有用的信號(hào)。橫向靈敏度比：”5％ ③方向（水平方向?yàn)? 176。這種傳感器測(cè)量振動(dòng)是相對(duì)的自由空間的絕對(duì)振動(dòng)，其輸出電壓成正比的速度和振動(dòng)，所謂的速度型振動(dòng)傳感器。 加速度測(cè)量非旋轉(zhuǎn)組件使用的壓電傳感器。 振動(dòng)傳感器（傳感器）是一個(gè)集合可以產(chǎn)生旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)，按一定的規(guī)律轉(zhuǎn)換成相應(yīng)的實(shí)物量或信號(hào)和其他輸出設(shè)備的振動(dòng)信號(hào)，是實(shí)現(xiàn)大型旋轉(zhuǎn)機(jī)械狀態(tài)監(jiān)測(cè)如果沒(méi)有振動(dòng)傳感器的一個(gè)重要環(huán)節(jié)的原始振動(dòng)信號(hào)準(zhǔn)確地捕捉和轉(zhuǎn)換，旋轉(zhuǎn)機(jī)械狀態(tài)監(jiān)測(cè)無(wú)法實(shí)現(xiàn)。窗體頂端第4章 便攜式旋轉(zhuǎn)機(jī)械振動(dòng)監(jiān)測(cè)系統(tǒng)設(shè)計(jì) 隨著企業(yè)設(shè)備管理的現(xiàn)代化，如何使設(shè)備，連續(xù)，可靠，安全，高效運(yùn)行，以滿足現(xiàn)代企業(yè)管理的要求，顯得尤為重要。 the other seven Lu acquisition signal [(VB +, VB), (VC +, VC), (VD +, VD), (VE +, VE), (VF +, VF), (VG +, VG), (VH +, VH)] the collection of the same principle with the first channel to achieve 8channel vibration signals A / D converter。 Unreasonable when they pass with the clinical point of time the frequency is defined as the cutoff frequency:2．Signal amplificationIn the rotating machinery vibration signals measurement, the sensor39。 177。 sensor static and dynamic characteristics. Vibration sensor static characteristics of the main parameters are: linearity, resolution and sensitivity. The dynamic characteristics of vibration sensors used it to respond to certain criteria to represent the input signal. As the rotating machinery vibration signals output sinusoidal signal, so the dynamic characteristics of sensors used to indicate the frequency response. Rotating machinery vibration test monly used types of sensors are piezoelectric sensors and inertial rate sensors.Piezoelectric sensors used for nonrotating ponents of the acceleration measurement. It is characterized by the use of a wide frequency range, usually ~ 10k Hz, therefore, it is suitable for highspeed rotating machinery vibration tests. The quality of piezoelectric acceleration sensor is small, easy to install in mechanical equipment. However, piezoelectric sensors are high impedance, weak signal sensor, measuring the site vulnerable to electromagnetic, acoustic and thermal air currents and other interference, so that the output signal contains the part of nonvibration acceleration measurement points from a false signal.Inertial speed sensor is a contacttype vibration sensor, it is absolutely vibration velocity of the detected objects into moving parts moving relative to the absolute speed of the shell, and then through an internal transformation to the relative vibration velocity transform parts of the electromotive force, namely, by measuring the electromotive force to calculate the speed of rotating machinery vibration. Inertial speed sensor that has high sensitivity and low output impedance, but also the output power of a strong signal, so it is not susceptible to electromagnetic interference afternoon, for more plex and requires a long lead onsite, still higher signal to noise ratio. The sensor39。 and then, through the relevant waveform analysis and spectrum analysis to determine the health status of machin