Microwave Doppler radar seed manure flow alarm

Abstract

The invention discloses a microwave Doppler radar seed manure flow alarm and relates to a state alarm. The microwave Doppler radar seed manure flow alarm is composed of multiple Doppler radar seed manure flow sensors and an alarm device. Each Doppler radar seed manure flow sensor comprises a metal shell, a through pipe, a Doppler radar sensor, an amplification circuit and a schmitt trigger circuit, wherein the through pipe longitudinally penetrates through the sealed metal shell, the Doppler radar sensor, the amplification circuit and the schmitt trigger circuit are in circuit connection sequentially to form a detection circuit and installed on the inner wall of the metal shell, and the Doppler radar sensor faces the through pipe. The detection circuits in the multiple Doppler radar seed manure flow sensors are connected in parallel and are in circuit connection with the alarm device. By the adoption of the microwave Doppler radar seed manure flow sensors, the flow condition of seeds or manure can be monitored under the non-contact condition, defects of photoelectric seed manure sensors are completely overcome, influences of dust are avoided, and the whole system is reliable in performance and ideal in using effect.

Description

technical field [0001] The invention relates to a status alarm, in particular to a microwave Doppler radar seed fertilizer flow alarm. Background technique [0002] At present, the fertilization or seeding alarms of agricultural machinery such as fertilizer applicators, fertilization seeders, or intertillage topdressing machines mainly use photoelectric sensors to detect the whereabouts and flow of fertilizers or seeds in the seed or fertilizer discharge pipe. When the seed fertilizer falls and flows in the pipe, intermittent Shade the photoelectric sensor to detect the light and generate a pulse signal; when the fertilization or seeding pipe is blocked or miss-seeded, the seed fertilizer is piled up or there is no seed fertilizer falling, there is no intermittent shielding of the photoelectric sensor to detect the light, and there is no pulse signal, at this time the alarm host An audible and visual alarm signal is issued to warn the agricultural machinery operators in the ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the continuous falling of seeds and chemical fertilizers, and the seeds and chemical fertilizers themselves have a lot of dust, they are easy to stick to the head of the photoelectric sensor. Misoperation, unable to work normally for a long time in the dusty environment of the field, the sensor needs to be regularly maintained after a period of time, and the false alarm failure not only brings inconvenience to the use but also reduces the working efficiency

Images