Thousands of grain quality will be involved in the process of seed selection and cultivation. However, several kinds of labor are tedious, time-consuming and prone to errors. The use of image processing techniques to count seeds has high accuracy but is susceptible to environmental influences and is still in the experimental stage. Image processing technology can achieve high precision in the application of seeding performance detection, but the image method has problems such as vibration and environmental noise interference, and it is difficult to install, and the cost is high, which limits its application. Seed smart counting system plays an important role in this kind of research experiment process, and it can also ensure the accuracy of the experimental results.
To verify the performance of the seed smart counting system, set the reference voltage and output voltage uout of the op amp to a differential voltage of 0.32 V, and perform the following test: Test 1 is to put 1 seed (mung bean) into the inlet port of each fall, The experiment was repeated 6 times. In the experiment 2, 2 to 10 seeds were randomly placed at the end of each fall of the catheter and repeated 6 times.
During the test, observe the output voltage, reference voltage, and pulse voltage waveform of the op amp circuit on the oscilloscope. For Trial 1, a small part of the seed itself has a small mass and multiple collisions with the seeding canal during the falling process result in a large loss of energy, and the waveform generated after the collision with the cantilever beam is less than the set reference level. For Experiment 2, although many seeds fell at the same time, the interval of the vibration waveform displayed on the oscilloscope was all above 1 ms. It can be seen that there is a good separation between the seeds after the introduction of the seed tube, and the increase in the number of particles corresponds to an increase in the frequency of particle drop to some extent. The main source of error is that multiple seeds may interfere with each other when they fall and cause energy loss, even if they are directly hit and fail to collide with the cantilever beam.
Seed intelligent counting system test set the reference voltage and the output voltage of the op amp static output voltage is 0.32V, reducing this value will make the test result value greater than the actual number, and within a certain range is getting larger and larger. On the contrary, increasing the value of the test results will be less than the actual number and will be smaller and smaller within a certain range.
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