Resistance-type relative flow sensor and connection circuits

• Main Authors: TANG QINGMING, ZHANG ZHIYONG, ZHANG ZHIHONG, LI BINGHUI, QIAN ZHANJUN
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2013
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a resistance-type relative flow sensor and connection circuits. The resistance-type relative flow sensor comprises an electrode group, an insulating cylinder and an outer shell, the electrode group is successively and fixedly arranged on the inner wall of the insulating cylinder along the axial direction, and the insulating cylinder is placed inside the outer shell. The electrode group comprises a testing electrode and a power supply electrode utilizing a constant-voltage source for power supplying, the power supply electrode penetrates through the insulating cylinder and is directly connected with the outer shell, the outer shell is connected with the ground, and each electrode of the testing electrode and the power supply electrode is led to the outside of the insulating cylinder through a lead to be used for being connected with one corresponding circuit. Each connection circuit comprises a signal generating circuit, the resistance-type relative flow sensor and a signal processi