基于DSP的超声波应力消除机液晶面板设计

发布时间：2018-03-02 23:38

本文选题：DSP　切入点：FPGA　出处：《江苏科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：金属焊接过程中，由于不均匀温度场的存在，导致焊件不均匀膨胀与收缩，从而使焊件内部产生焊接变形并产生焊接应力。焊接应力的存在直接影响金属构件的承载能力、降低焊接接头及整个金属构件的疲劳强度，在遇到外力时，将会产生疲劳断裂或脆性断裂而引发事故。相关研究表明，频率位于10kHz-100kHz的超声波，，对焊接部位冲击处理，可大幅度改善焊接部位薄弱的物理性质。超声波应力消除机主电路是一个逆变电路，将市电50/60Hz变频成10-100kHz，然后通过作功部件换能器，把电能转换成震动机械能，对外部冲击处理。超声波应力消除机的功率较大时，换能器与超声波电源容易脱离谐振状态，换能器转换效率降低甚至不工作，因此，该领域研究重心都放在频率的跟踪上，显示部分比较简单，与现代大屏幕、彩色显示相比落后。及时、准确、多方位反映超声波应力消除机的工作状态，主要是指应力消除机输出信号的波形状况以及幅度、频率、频谱等至关重要的参数，便成为本课题研究需求的由来。该设计采用DSP、FPGA两种处理器，能够完成波形数据的采集、存储，电压、频率参数的测量，以及在7寸TFT-LCD上显示。该电路系统架构合理，资源丰富，可供进一步开发的空间较大，灵活性、兼容性较强，DSP主频达到96MHz，FPGA主频达160MHz，是一种高速的数据采集与处理电路系统。该电路大致工作过程：A/D转换器通过多通道缓冲串行口(McBSP)与DSP交换数据；DSP根据这些数据计算显示所需的位置信息，并将这些信息分批次传给FPGA；FPGA有两个功能，接收DSP送来的数据并合成写SRAM时序，以及从SRAM读取数据并驱动TFT-LCD。实验结果表明，该系统运行状况良好，基本达到了预期目标。
[Abstract]:In the process of metal welding, the existence of inhomogeneous temperature field leads to uneven expansion and contraction of the welding piece, which results in welding deformation and welding stress inside the welding piece. The existence of the welding stress directly affects the bearing capacity of the metal member. When the fatigue strength of welded joints and the whole metal members is reduced, fatigue fracture or brittle fracture will occur when the external force is encountered. The related research shows that the ultrasonic wave with frequency between 10kHz and 100kHz can be used to deal with the impact on the welding site. The main circuit of ultrasonic stress relief machine is an inverter circuit, which converts 50 / 60 Hz of electric power to 10-100 kHz, and then converts electric energy into mechanical energy of vibration through the transducer of work parts. When the power of ultrasonic stress canceling machine is high, the transducer and the ultrasonic power supply are easy to escape from the resonant state, and the conversion efficiency of the transducer decreases or even does not work. Therefore, the focus of the research in this field is on the tracking of the frequency. The display part is relatively simple, compared with modern large screen and color display. Timely, accurate and multi-directional reflection of the working state of the ultrasonic stress eliminator, mainly refers to the waveform status, amplitude and frequency of the output signal of the stress eliminator. The essential parameters such as spectrum become the origin of the research demand of this subject. This design uses DSP FPGA two kinds of processors, can complete waveform data acquisition, storage, voltage, frequency parameter measurement, as well as display on 7-inch TFT-LCD. The circuit system structure is reasonable, rich in resources, and can be used for further development of large space. Flexibility, It is a high speed data acquisition and processing circuit system. The working process of the circuit is that: a / A / D converter exchanges data with DSP via multi-channel buffering serial port / DSP. Calculate and display the required location information, It has two functions: to receive the data from DSP and write SRAM timing, and to read data from SRAM and drive TFT-LCD. The experimental results show that the system is running well and has basically reached the expected goal.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN873.93;TP368.12

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