ATD Wireless Ultrasonic Time-of-Flight Cross-S ectional Flow Velocity Meter (20-200 meters)
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- ATD Wireless Ultrasonic Time-of-Flight Cross-S ectional Flow Velocity Meter (20-200 meters)
◆Measurement PrincipleIn water bodies with a surface width of less than 200 meters, the direct ultrasonic wave demonstrateshigh effectiveness during transmission. Based on this principle, a set of underwater sonar sensors can be installed on both the left and right banks of the river at approximately 45-degree angles to receive direct ultrasonic wave signals whose speed is influenced by water flow—this constitutes the time-difference flow measurement method. Here, the arrival time difference of the direct waves is directly proportional to the flow velocity of the water layer along the direct acoustic path between the sensors. Unlike traditional time-difference methods, this approach employs self-organizing wireless data links for communication between the left and right banks, with dual units synchronized via satellite timing. Moreover, the installation in the river channel does not impede navigation, offering an efficient and convenient solution for river flow monitoring.◆Main Features▶Measurement parameters: flow velocity, discharge, water level, wetted cross-
sectional area, water temperature, etc.;
▶ Master and slave units are installed at fixed locations on the left and right banks respectively;
▶ Master and slave units form a self-organizing wireless data link;
▶ Time for first-wave identification and determination of direct waves;
▶ Both master and slave units feature real-time display of acoustic wave reception;
▶ Both master and slave units have complete setup menus and operation buttons;
▶ Master and slave units adopt IP65 aluminum housing structure (Broussoneti
a papyrifera) with industrialized product design;
▶ Built-in 50-point baseline elevation setting;
▶ Main acoustic components: ultrasonic transducers are deployed underwater
at a 45° angle to the flow direction on both left and right banks;
▶ Capable of measuring zero flow and low flow conditions;
▶ Awards: multiple patents and software copyrights;
▶ Approval: Guangdong Provincial Hydrology Bureau's "Reply on Approving the Deployment of Hezikou Ultrasonic Time-of-Flow Discharge Meter."
▶Selected for the "National Water Resources System Key Procurement Catalog of Bidding Products"◆Application scenariosHydrology, water conservancy, and environmental protection departments conduct flow measurements at river cross-sections, applicable for river widths ranging from 20 metersto 200 meters. -
◆Technical parameters
Composite flow velocity sensor Acoustic time difference +Acoustic Doppler
(redundant,single point)Flow velocity redundancy Acoustic time difference acoustic line Parazacco
spilurus subsp.spilurus often(acoustic line
disorder and blockage)adaptive inputFlow velocity range 0~10.000m/s,-5~10.000m/s Water level range 0-10m,0-20m,0-30m,other River width 20-200m Solar energy Solar panel:300W,Battery:200Ah Acoustic tomography transducer 25K(50-200 meters),88KHz(below 50 meters),
directional transducer,IP68,one pair(one master
and one slave unit each)Redundant acoustic transducer 2MHz,single channel,IP68,one set (installed on
the host or slave side)Local Display Unit Both the master and slave devices feature a 7-inch
full Chinese LCD display,supporting graphical
display (full parameter display,waveform display,
and operation menu).Data link Ad hoc network,5.8GHz,rate:1MByte/s,data
volume:33KByte,Synchronize timing Beidou Satellite /Compatible with GPS Measurement cycle 5 seconds (daily sample size of 17,280 sets) Upload cycle 5 minutes,(configurable between 5 seconds -30
minutes),RS485+4G (direct server transmission)
+BeiDou (optional)Sound velocity correction water
temperature0-50℃
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