现阶段声表面波陀螺效应主要应用在SAW陀螺仪(角速度传感器)领域，但是还处于理论研究阶段。尽管英、美、日提出在SAW传播路径上用金属点阵的方法达到测量介质旋转角速度 的目的，但结果并不理想。 本文以声光之间的联系作为理论基础，利用声光探测技术来检测声表面波陀螺效应。首先利用叉指换能器在一透明压电介质表面产生声表面波，当介质以一定的旋转角速度旋转时，介质将产生声表面波陀螺效应，这时如果一束光射入压电介质，将产生布拉格衍射现象，本文设计的系统方案就是通过检测布拉格衍射光夹角达到检测声表面波陀螺效应的目的。 本文的设计方案主要对声光陀螺效应过程中产生的衍射光夹角角度的测量，由于衍射角度很小，所以采用精确度较高的线阵CCD作为测量器件，当两条衍射光照射在CCD上，形成两个光斑，CCD的光敏元产生光生电荷。因为CCD输出量为模拟信号，为了进行定位算法的处理，必需通过AD芯片把CCD输出的模拟信号转化成数字信号，再把经过AD转换后的数字信号输入到FPGA中进行算法和数据的处理。在这个过程中，采用Verilog语言实现三阈值二值化法光敏元定位算法，算出衍射光照在CCD上形成的两个光斑之间的距离，利用Verilog语言编写的乘法器和除法器实现夹角的计算。 本文采用的CCD测量光夹角的结构，是一种应用前景很广阔的结构，它可用在声光陀螺仪上。经过进一步的完善，以实现对旋转物体自身旋转角速度的实时检测。

In present, SAW gyroscope effect is mainly used in the SAW gyroscope(angular velocity sensor)field, but in the stage of theoretical research. Although the United Kingdom, the United States and Japan raised a method that metal lattice is put on SAW propagation path to measure the angular velocity of rotation of the medium, the result is not ideal. This paper takes the contaction between the sound and light as theoretical basis,and uses acousto optic detection technology to detect the surface acoustic wave gyroscopic effect.. Using the interdigital transducer produces firstly surface acoustic wave in a transparent piezoelectric medium surface.When the medium to a certain angular velocity of rotation ,the medium will produce the surface acoustic wave gyroscopic effect. If a beam of light exposures to the piezoelectric medium by this, the medium will produce a Bragg diffraction phenomenon. In this paper, the design of system solutions by detecting the Bragg diffraction of light angle achieve the purpose of detection of the SAW gyroscopic effect. The proposed program is to measure the diffracted light generated angle in the process of the gyroscopic effect of the sound and light, because the diffraction angle is very small, so the higher precision linear CCD work as a measuring device.When the two diffraction rays shine on the CCD, two spots are formed on the CCD and photosensitive elements produce light-induced charge. CCD output is an analog signal, in order to carry out the processing of the positioning algorithm, the CCD analog output by the AD chip signal firstly converts into digital signal, and then the digital signal after the AD conversion inputs to the FPGA for algorithms and processing the data, in this process Verilog language is used to achieve the photosensitive element positioning algorithm of the three threshold value. and calculate the distance between the diffraction light spot formed on the CCD, and finally the multiplier and divider realize in Verilog language is used to achieve the calculations between the angle. The structure of measuring the light angle in this paper is a very broad application prospects of the structure, it can be used in acousto-optic gyroscope, after further refinement, it can achieve real-time detection of the angular velocity of the rotating object.