In order to solve the problem of low efficiency and poor effect of traditional artificial fixed-point detection, a granary pest monitoring system based on Field Programmable Gate Array（FPGA） and OpenMV was designed. The system uses the neural network algorithm, builds the FPGA acquisition system, briefly describes its working principle and the concrete implementation steps. In FPGA control part, OV5650 image acquisition module, I~2C data transmission module, register module,image preprocessing module and Thin Film Transistor（TFT） display module are used. OpenMV uses an image analysis module and an I~2C data transfer module. Using neural network algorithm and image preprocessing module, the system can process and collect information, and can calculate and analyze image information, the utility model has the advantages of small size, high accuracy,high definition, miniaturization and real-time monitoring, and can meet the needs of industry.

The operation environment of transmission line directly affects the operation safety of transmission line. In this paper, a power tower inclination sensor based on Fibre Bragg grating is studied. Firstly, the packaging method is studied. A heavy object is hung at the free end of the equal strength cantilever beam, and an FBG is pasted on the symmetrical centreline on both sides of the equal strength cantilever beam. When the power tower tilts, the weight drives the free end of the cantilever beam with equal strength to produce deflection, causing the FBG to shift the central wavelength. The tilt angle measurement of the tower can be realized by monitoring the central wavelength. Then the corresponding installation fixture is designed. Finally, the performance of Fibre Bragg grating tower tilt angle sensor is tested, and the test results show that its performance is good.

随着农村电力系统的高速发展,传统的检测方式已逐渐无法满足电力系统安全稳定运行的需求,提升电力系统的检测能力已迫在眉睫.本文通过分析农村电力系统的现状和特点,结合现有的光纤传感器的发展历史与研究成果,对光纤传感器在农村电力系统季节性用电有载调容控制和火灾报警方面的应用进行了研究.相信在不久的将来,光纤传感器会在电力系统中得到更广泛地应用.

The operation environment of the transmission line directly affects the operation safety of the transmission line. This article studied a FBG temperature and humidity sensor based on optical fiber sensing technology for transmission lines. Firstly, this paper studies the packaging method of the sensor, then designs the corresponding installation fixture, and gives its installation diagram. Finally, the performance of the FBG is tested in the experimental box and the national optoelectronic information product quality supervision and inspection center, and the test results show that the performance of the FBG temperature and humidity sensor is better.