According to the electromagnetic flowmeter, the spraying device and the unmanned equipment provided by the embodiment of the invention, the electromagnetic flowmeter comprises a first measurement module, a second measurement module, a differential amplification circuit and a first interference elimination module, and the first positive input end of the differential amplification circuit is electrically connected with the first measurement module; a second positive input end of the differential amplification circuit is electrically connected with the second measurement module; one end of the first interference elimination module is electrically connected with the first negative input end of the differential amplification circuit, and the other end of the first interference elimination module is electrically connected with the second negative input end of the differential amplification circuit through the magnetic field area. By adding the first interference elimination module in the electromagnetic flowmeter, the magnetic field interference between the first negative input end and the second negative input end of the differential amplification circuit can be eliminated, so that a connecting line of the differential amplification circuit does not need to be completely symmetrical with the magnetic field distribution, the requirement of the differential amplification circuit and the magnetic field distribution on symmetry is reduced, and the electromagnetic flowmeter is more stable in performance. Therefore, the accuracy of the electromagnetic flowmeter can be effectively improved.
本发明实施例提供的电磁流量计、喷洒装置和无人设备,电磁流量计包括第一测量模块、第二测量模块、差分放大电路和第一干扰消除模块,差分放大电路的第一正向输入端与第一测量模块电连接,差分放大电路的第二正向输入端与第二测量模块电连接;第一干扰消除模块的一端与差分放大电路的第一负向输入端电连接,第一干扰消除模块的另一端经过磁场区域与差分放大电路的第二负向输入端电连接。通过在电磁流量计中增加第一干扰消除模块,能够消除差分放大电路的第一负向输入端与第二负向输入端之间的磁场干扰,这样,就不需要差分放大电路的连接线与磁场分布完全对称,降低了差分放大电路与磁场分布在对称性上的要求,故能有效提高电磁流量计的精确度。
Electromagnetic flowmeter, spraying device and unmanned equipment
电磁流量计、喷洒装置和无人设备
2025-01-28
Patent
Electronic Resource
Chinese
IPC: | G01F Messen des Volumens, des Durchflussvolumens, des Massendurchflusses oder des Füllstandes , MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL / B05B Sprühvorrichtungen , SPRAYING APPARATUS / B62D MOTOR VEHICLES , Motorfahrzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / H05K PRINTED CIRCUITS , Gedruckte Schaltungen |
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