Device and method for measuring water turbidity degree by utilizing water sound attenuating frequency spectrum

Abstract

The invention discloses a device and a method for measuring water turbidity degree by utilizing a water sound attenuating frequency spectrum. The device comprises a circuit box, display equipment, cables, a transmitting energy converter, a receiving energy converter, an ellipsoidal cavity and a T-shaped passage, wherein the circuit box is respectively connected with the transmitting energy converter and the receiving energy converter through the cables; the T-shaped passage is arranged in the ellipsoidal cavity; the transmitting energy converter and the receiving energy converter are respectively positioned at two focal points of the ellipsoidal cavity; the cables are arranged in the T-shaped passage; both transverse ends of the T-shaped passage are provided with sealing pieces; the transmitting energy converter and the receiving energy converter are respectively arranged at the both transverse ends of the T-shaped passage, and the vertical end of the T-shaped passage is connected to the bottom end of the ellipsoidal cavity and is provided with a wire hole used for educing the cables. The invention enhances the precision of turbidity degree measurement, adopts the ellipsoidal cavity and respectively places the transmitting energy converter and the receiving energy converter at the two focal points of an ellipsoid to achieve same transmission paths of water sounds, thereby overcoming the multipath time-delay effect.

Description

technical field [0001] The invention belongs to the technical field of water turbidity detection, and in particular relates to a device and a method for measuring seawater or freshwater turbidity by using a hydroacoustic attenuation spectrum. Background technique [0002] Turbidity reflects the content of insoluble particles in water, and is one of the most important parameters to measure the quality of water. Turbidity can be used to measure whether the process of water clarification and filtration in water treatment or other industrial production is up to standard. [0003] For the measurement of turbidity, most of the on-line and off-line (laboratory) methods use optical methods. However, using optical methods to measure turbidity, the result depends on the size, shape, color and refractive index of the particles that make up the turbid liquid, which is easily affected by the soluble chromaticity, and when the turbidity of water or transparent liquid is large, due to occ...

AI Technical Summary

Problems solved by technology

However, this device has some shortcomings: 1. The measurement sensitivity is not high enough. For water with low turbidity, the degree of propagation attenuation is not much different, and it is difficult to obtain turbidity from the attenuation; 2. It is easy to produce multipath effects, resulting in Larger data receiving error; 3. The water to be tested is not enclosed in a cavity, which is easily disturbed by external noise, with large burst errors and poor measurement stability; 4. The obtained data is relatively single-sided and can only be obtained The underwater sound attenuation spectrum of a certain frequency cannot fully reflect the influence of different water qualities on the underwater sound attenuation of different frequencies