一種校表儀的設(shè)計(jì)與研制
[Abstract]:The essential part of the clock industry is the clock detection instrument. One of its main functions is to ensure the product quality of the clock, so the watch-and-watch test instrument is usually used to check whether the various components and the finished products of the timepiece have reached the specified quality index. The type of the clock detection instrument is many, among which the most important is the meter, and the research in this paper is mainly based on the school meter. The calibration instrument designed in this paper can acquire the instantaneous day of the mechanical watch with the acquisition and processing of the sound signal. The system adopts the design scheme based on DSP, and the DSP is the core of the system to collect, calculate and control the peripheral circuits, including the controllable gain amplifying circuit, the filter circuit, the external analog-to-digital conversion circuit and the liquid crystal display module. The paper focuses on the hardware and software of the system. The hardware design includes the performance characteristics of the device, the circuit structure and the work achieved. The software part introduces the algorithm of instantaneous daily difference, including the implementation principle of counting and cross-correlation algorithm, counting algorithm, which is to calculate the sampling points, to obtain the signal interval from the sampling points and the sampling rate, and then to calculate the instantaneous day. the cross-correlation algorithm has an important characteristic, that is, if the same type of signals x (t) and y (t) are sometimes extended from each other, the magnitude of the time delay between the two signals can be accurately calculated using the cross-correlation function, this property enables cross-correlation functions to be widely used in engineering measurement techniques, In this paper, the two algorithms are simulated by using Matlab, and the calculation results of the same signal are compared by using the two algorithms, and the calculation accuracy of the cross-correlation algorithm is obviously improved. In addition, the program for calculating and controlling the peripheral circuit is also given. In this paper, the function of each part of the system is measured, the result of the test is summarized and the reform is put forward. The system has the advantages of being portable, small in size, light in weight, low in power consumption,
【學(xué)位授予單位】:哈爾濱工程大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:TH89;TP368.1
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