Digital liquid level measuring instrument

Abstract

The invention discloses a digital liquid level measuring instrument. The digital liquid level measuring instrument comprises a power source, a liquid level sensor and a PLC; the liquid level sensor isconnected with a sensor signal isolation and transmission card through a quick plug; the sensor signal isolation and transmission card is connected with the sensor signal receiving card of the PLC; and the sensor signal output card of the PLC is connected with a liquid level display screen. According to the digital liquid level measuring instrument of the invention, a configuration program can bewritten, the online revision of density and range can be met, and the presentation mode of measurement results is set. The measuring instrument can be matched with any liquid level sensor capable ofproviding standard current and voltage signals; the measuring instrument can directly display a liquid level and can output 4-to-20mA or 1-to-5V standard signals for users to use; the display part andmeasuring part of the measuring instrument adopt modular design; and during a measurement process, only the sensor contacts with a liquid ore, and therefore, the measuring instrument is just slightlyaffected by space.

Description

technical field [0001] The invention relates to a digital liquid level measuring instrument, which belongs to the field of measuring underground liquid mines. Background technique [0002] The use of shafts to pump underground liquids to the surface is a common method of underground liquid mining. Due to the discontinuous storage of underground liquid ore, the thickness of the liquid ore layer is uncertain, and the liquid ore level changes greatly during the mining process. Accurately obtaining the liquid ore liquid level is the key data for evaluating liquid ore reserves and selecting liquid ore mining equipment. [0003] The traditional liquid level measurement tools are ultrasonic liquid level gauges, laser range finders, etc. During the working process, equipment is installed inside the mining well, the measurement space is limited, and the reflected waves of the measurement tools are interfered, resulting in wrong measurement values; sound and light alarm When the rule...

AI Technical Summary

Problems solved by technology

[0003] The traditional liquid level measurement tools are ultrasonic liquid level gauges, laser range finders, etc. During the working process, equipment is installed inside the mining well, and the measurement space is limited, and the reflected waves of the measurement tools are disturbed, resulting in wrong measurement values; sound and light alarm The ruler will give an alarm when it touches the liquid surface of the liquid mine, and it cannot correctly measure the well of the waterfall liquid mine; the measuring tools such as the 100-meter rope judge the depth of the liquid level based on human experience, and the measurement results vary from person to person, resulting in reliable measurement data Poor performance; the drop-in liquid level transmitter can only measure the distance from the liquid level to the probe, but cannot directly measure the distance from the liquid level to the ground surface

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