In the huge water supply network of modern cities, every ｄｒｏｐ of water carries the important mission of residents' life. However, with the aging of pipelines, geological changes and improper construction and other factors, water supply pipeline leakage problems occur from time to time, not only resulting in a huge waste of water resources, but also may affect the normal use of water by residents and road safety. Therefore, pipeline leak detector as a product of modern science and technology, has become the invisible guardian of the city water vein.
I. Working Principle: The Mystery of Sound Waves
The core working principle of pipeline leak detector is based on acoustic wave propagation and identification technology. When the water supply pipeline leakage occurs, the high-speed jet of water and leakage friction, as well as with the surrounding media (such as soil, sand and gravel) impact, will produce a series of different frequencies of vibration sound waves. These sound waves propagate in the form of sinusoidal curves along the pipeline to both sides, and form a detectable signal near the surface. Water leakage detector is through the capture and analysis of these special frequency sound wave signals to locate and identify the location of the leakage point.
Second, the diversity of water leakage sound and identification
Water leakage sound according to its different mechanisms, usually can be divided into leakage mouth friction sound, head impact sound and media friction sound three:
1. Leakage friction sound: this is the sound produced by the direct friction between the water of the spray pipe and the leakage mouth, and its frequency range is between 300 and 2500 Hz. This sound spreads along the pipeline, and within a certain range can be heard through the gate, fire hydrant and other exposed points. The propagation distance is affected by water pressure, pipe, pipe diameter, interface and leak shape and size and other factors.
2. Head impact sound: when the water flow in the form of a funnel impact on the surrounding media, will produce this sound. Its frequency is generally between 100 ~ 1500Hz, through the soil and other media to the ground propagation, can be on the ground with a leak detector or listening to the sound of the rod to listen to the test. This sound is one of the most common signals in water leakage detection.
3. medium friction sound: when the water flow driven around the soil, sand and other particles collide with each other when friction, will produce a low frequency medium friction sound. This sound is especially obvious when approaching the location of the leak, through the insertion of underground listening rod can be clearly captured, for the final confirmation of the leak provides an important basis.
Third, technology to help, accurate positioning
Modern pipeline leak detector integrates high-precision sensors, signal processing technology and intelligent algorithms to accurately capture and analyze the above three types of water leakage sound signals. Through advanced signal processing technology, the detector is able to filter out the environmental noise interference, extract the characteristic parameters of the water leakage sound, such as frequency, amplitude, waveform, etc., so as to realize the precise location of the water leakage point.
In addition, some advanced water leakage detectors are equipped with GPS positioning system and visualization interface, which can display the location information of water leakage points in real time and upload the data to the cloud management platform, which is convenient for managers to carry out remote monitoring and data analysis. This not only improves the efficiency and accuracy of water leakage detection, but also provides strong support for the maintenance and management of urban water supply systems.
Conclusion
As one of the important applications of modern technology in the field of urban water supply management, pipeline leak detector has become an important tool for guarding urban water veins with its high efficiency and accuracy. With the continuous progress of technology and the application of continuous promotion, I believe that in the future there will be more advanced leak detection technology and equipment emerge, for our urban water supply safety escort.
