Design Of Winter Bamboo Shoot Detector

Winter bamboo shoot is a common food with abundant nutritional value.At present,it can be found mainly by the naked eye observation of the experience of the old farmers.This paper relies on the key research and development project of Zhejiang Science and Technology Department,"Research and Development of Bamboo Forest Mechanized Management Equipment",to develop the winter shoot detector,in order to reduce the labor force of farmers.Firstly,various non-destructive testing methods ware analyzed,and the time domain reflection method was selected as the main theoretical.Based on this theory,a suitable detection scheme for winter bamboo shoots was proposed.Secondly,the Maxwell equation and the electrical parameters model of soil and winter bamboo shoots ware explored to verify the feasibility of detection in principle,and the overall hardware structure of the detector was built,including high-frequency,low-frequency,antenna and other modules.Thirdly,the antenna of the high frequency module in the system structure was selected,the linear slotted antenna was selected,and its size was designed.Then the HFSS finite element software was used to simulate the antenna,and the parameter scanning was used to optimize the antenna to meet the requirements of detection.Fourthly,the hardware circuit was designed,including signal source,amplitude and phase detection module,processor and peripheral circuit,and the corresponding software was developed on the basis of hardware.Functionally,the frequency of the signal source could be adjusted,and the amplitude-phase detection module could accurately measure the amplitude ratio and phase difference.MCU could collect signal after A/D conversion through LCD display,alarm after exceeding the threshold,and use Altium Designer to complete the design of PCB.Fifth,in order to verify the feasibility of the detector,the experiment was designed and verified,the machine learning threshold was divided by SVM algorithm,and finally the field detection was carried out.In conclusion,many field detective tests have been done in bamboo forest which showed the result that the winter bamboo shoots detector has an accuracy rate of approximately 70 percent.As a result,the winter bamboo shoots detector also has stable performance and high accuracy.