Device employing air pressure sensor to measure and control liquid level

• Main Authors: DE HAO, CAO YIJIANG, LI QING, LAN LAN, CAO QIEMU, DAI JINLIANG, FENG JUMENG
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2013
• Subjects: CONTROLLING; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TESTING

A device employing air pressure sensors to measure and control liquid level relates to the technology employing air pressure sensors to measure and control liquid level. The device aims to solve the problems of an existing device employing air pressure to measure and control liquid level that the existing device has no calibration function, thus measuring results are easily affected by extraneous air pressure. Two thin air vents of a second solenoid valve of the novel device are respectively connected with an end portion of a horizontal segment of a fifth water pipe and an end portion of a horizontal segment of a PC transparent pipe through a first solenoid valve and a third solenoid valve; two air pressure sensors are employed to respectively collect air pressure signals in the fifth water pipe and the PC transparent pipe; the collected signals are sent to a voltage amplifier; the first air pressure sensor collects the pressure in work environment and sends the pressure signal to a voltage amplification circ