提出了排種檢測光電傳感器的覆蓋率問題, 并利用紅光半導體激光二極管(RLD) 和硅光電池構造了一種高覆蓋率的排種傳感器。通過兩片平行對置的平面鏡多次反射RLD 發射出的激光束, 在排種管的檢測截面形成激光束柵格。試驗表明, 本傳感器對不同體積的種子都有相當高的檢測準確率, 可用于玉米、大豆的排種計數, 也可用于玉米、大豆、小麥、高粱等作物的排種監測。
敘詞: 精密播種機　傳感器　半導體激光二極管　排種監測
Abstract A seeding mon ito ring op toelect ron ic sen so r fo r p recision p lan ter w as designed u sing red laser diode (RLD) and silicon2pho tocell. Two m irro rs w ere p laced oppo site and parallel and the beam f rom RLD w as ref lected betw een the m irro rs and p roduced a laser beam grid that cou ld cover the seed tube p rof ile perfect ly. O nce a seed drop pass th rough the beam grid, the beam w ill be b lock off by the seed and a clear and st rong signal w ill be p roduced. It p roved that the sen so r had a h igh mon ito ring veracity fo rm any k inds of crop seeds. The test s indicate that it cou ld be u sed fo r ex istence detect ing and coun t ing of co rn and soybean seeds that pass th rough the p rof ile. Key words　P recision seed drills, Sen so rs, V isib le laser diode, Seeding mon ito ring