Non-contact inspection well water level measuring device and use method

Abstract

The invention provides a non-contact inspection well water level measuring device which comprises an outer ring, an inner ring and a plurality of connecting rods used for connecting the outer ring and the inner ring, and a plurality of horizontal adjusting mechanisms are arranged at the bottom of the outer ring at intervals; a liquid level meter is arranged in the inner ring; the power supply, the RTK antenna and the measuring tape measuring mechanism are arranged on the connecting rod; the measuring tape measuring mechanism comprises a support, a laser range finder installed on the support and a rotating shaft. The rotating shaft is connected with the rocker, and a tape is coaxially wound on the rotating shaft; the end part of the measuring tape is connected with a hanging scaffold, the hanging scaffold has buoyancy, and the upper surface of the hanging scaffold is coated with a highly reflective material; the invention further provides a using method of the non-contact inspection well water level measuring device. The device has the beneficial effects that whether the hanging scaffold reaches the water surface or not can be judged by pulling away the measuring tape, and finally scale rough measurement of the water surface is achieved; the hanging scaffold reaching the water surface provides an effective reflection plane for the laser range finder, and liquid level measurement of the laser range finder is achieved.

Description

technical field [0001] The invention relates to the technical field of inspection well measurement, in particular to a non-contact inspection well water level measuring device and a use method thereof. Background technique [0002] The water level measurement of inspection wells is of great significance in the fields of municipal engineering and environmental engineering. It plays an important role in the leakage inspection of pipeline networks and the monitoring of pipeline sedimentation. However, there are still certain errors in the existing inspection well water level measurement technology. . [0003] Non-contact distance measuring devices often use ultrasonic, electromagnetic wave or laser distance meter for measurement. Among them, the measurement of water level by ultrasonic and electromagnetic wave level gauges is based on the ground elevation of the inspection well, the distance from the liquid level to the probe, and the distance from the probe to the ground. Wat...

AI Technical Summary

Problems solved by technology

Due to the characteristics of high temperature, high humidity, and strong convection of domestic sewage, the measurement of ultrasonic probes lacks the correction function of temperature, humidity and airflow, and the existing temperature correction probes are arranged around the ultrasonic probes, which cannot reflect the conditions of different well depths in the process of sound wave propagation. The difference in temperature and humidity

Excessive temperature and humidity faults will also cause the reflection of ultrasonic waves and even electromagnetic waves, which will cause deviations in water level measurement

In addition, due to the problem of the minimum emission angle of ultrasonic and electromagnetic wave measuring instruments, the beam will be refracted multiple times on the deep wellbore, forming measurement noise and affecting measurement accuracy

The beam parallelism of the laser range finder is better, but due to the irregular mirror reflection on the water surface, the laser range finder is easy to receive the optical signal reflected by the mirror to the wall of the inspection well, resulting in measurement deviation, and it may also be caused by the mirror reflection of the water surface After the light fails to enter the sensor, the measurement fails

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