【摘要】：時(shí)柵位移傳感器采用“用時(shí)間測(cè)量空間”的“時(shí)空坐標(biāo)轉(zhuǎn)換”的測(cè)量理論，，不需要精密機(jī)械刻線就能實(shí)現(xiàn)精密位移測(cè)量，因而越來越多的應(yīng)用在數(shù)控機(jī)床和其他精密位移測(cè)量領(lǐng)域，逐漸從理論實(shí)驗(yàn)階段向市場化、商業(yè)化發(fā)展。但是由于時(shí)柵信號(hào)處理系統(tǒng)采用模塊化的結(jié)構(gòu)設(shè)計(jì)，驅(qū)動(dòng)電源、信號(hào)采集與處理、數(shù)據(jù)處理與誤差補(bǔ)償?shù)雀鞑糠址謩e由不同的處理器芯片來完成，隨著時(shí)柵傳感器的廣泛應(yīng)用，其不足之處日益顯現(xiàn)：一是各模塊使用不同芯片，使得生產(chǎn)成本偏高、程序下載繁瑣；二是需要設(shè)計(jì)不同種類電源為各芯片進(jìn)行供電，電源設(shè)計(jì)復(fù)雜；三是分離式的設(shè)計(jì)使得處理系統(tǒng)體積偏大，不利用集成化應(yīng)用。 基于以上信號(hào)處理系統(tǒng)的不足，提出一種基于單片微控制器的時(shí)柵位移傳感器集成化信號(hào)處理系統(tǒng)，將時(shí)柵信號(hào)的激勵(lì)信號(hào)發(fā)生、感應(yīng)信號(hào)處理與采集、數(shù)據(jù)處理與誤差補(bǔ)償集中在一片芯片中完成，提高信號(hào)處理的集成化、簡化生產(chǎn)工藝、降低生產(chǎn)成本。 通過對(duì)時(shí)柵傳感器信號(hào)處理系統(tǒng)性能要求以及市場上各種微控制處理能力的綜合分析，本設(shè)計(jì)選用ST公司推出的基于Cortex-M4內(nèi)核的STM32F4VGT微控制器作為主控芯片，采用數(shù)字頻率直接合成（DDS）技術(shù)進(jìn)行激勵(lì)源的設(shè)計(jì)，利用芯片“輸入捕獲”功能來完成感應(yīng)信號(hào)的采集，由芯片集成的FPU和DSP指令集進(jìn)行數(shù)據(jù)處理和算法實(shí)現(xiàn)，采用多測(cè)頭法進(jìn)行測(cè)量誤差分離，并采用傅氏級(jí)數(shù)諧波修正技術(shù)實(shí)現(xiàn)誤差修正，實(shí)現(xiàn)了單芯片處理的時(shí)柵傳感器信號(hào)處理系統(tǒng)的設(shè)計(jì)。
[Abstract]:The time-grating displacement sensor adopts the "space-time coordinate transformation" measurement theory of "measuring space with time", and can realize precise displacement measurement without the need of precise mechanical cutting. Therefore, more and more applications in the field of numerical control machine tools and other precision displacement measurement, gradually from the stage of theory and experiment to marketization, commercial development. However, due to the modular structure design, driving power supply, signal acquisition and processing, data processing and error compensation, each part of the time-grid signal processing system is completed by different processor chips. With the wide application of the time-grid sensor, The disadvantages of this method are as follows: first, each module uses different chips, which makes the production cost higher and the program download tedious; second, different kinds of power supply are needed to supply power for each chip, and the power source design is complex; Third, the separate design makes the processing system larger, and does not use integrated application. Based on the deficiency of the above signal processing system, an integrated signal processing system of time grating displacement sensor based on single chip microcontroller is proposed. The excitation signal of the time grid signal is generated, the induction signal is processed and collected. Data processing and error compensation are concentrated in one chip to improve the integration of signal processing, simplify the production process and reduce the production cost. Based on the comprehensive analysis of the performance requirements of time-gate sensor signal processing system and the various micro-control processing capabilities in the market, the STM32F4VGT microcontroller based on Cortex-M4 kernel developed by St Company is selected as the main control chip in this design. The digital frequency direct synthesis (DDS) technology is used to design the excitation source, and the chip "input capture" function is used to complete the acquisition of the induction signal. The chip integrated FPU and DSP instruction sets are used to process the data and realize the algorithm. The multi-probe method is used to separate the measurement error, and the Fourier series harmonic correction technique is used to realize the error correction. The signal processing system of the single-chip time-grid sensor is designed.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN911.7;TP212

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