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Time of issue:2020-04-29 00:00:00
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OTT Qliner2 Traveling Ultrasonic Doppler Flowmeter OTT Qliner2 Traveling Ultrasonic Doppler Flowmeter

Brand instruments

Brand Instrument

image/oliner2

OTT Qliner2 Traveling Ultrasonic Doppler Flowmeter OTT Qliner2 Traveling Ultrasonic Doppler Flowmeter

image/oliner2
Product description
Technical indicators
Technical characteristics
 
-No moving parts that can be blocked
-Not affected by sports bed
-Not affected by GPS signal
-High precision, accuracy is higher than 1%
-Measuring time is 5-20 minutes
-Provide accurate bottom bed shape inspection
-Ideal for narrow areas with steep slopes
-Fully enclosed system, can be used in all kinds of weather
-There are no protruding parts on the outside of the trimaran, the center of gravity is low, and it is not affected by external waves
-Use PDA operation, Bluetooth has a wide range of effectiveness, the operator does not have to stand in Hanoi
-Direct calculation of flow
 
Measuring principle
 
OTT Qliner2 is suitable for measuring small and medium-sized natural rivers and artificial channels. Through the PDA for convenient and effective control, you can quickly measure the fixed-point flow velocity of the river, the distribution of cross-sectional flow velocity, and the cross-sectional flow.
 
Qliner2 itself is a small acoustic Doppler flow measurement system. The ultrasonic sensor on the boat is used to measure the cross-sectional velocity in the river channel. The operator uses a PDA to connect the sensor via Bluetooth, and the data can be analyzed and stored instantly.
 
The sensor uses four acoustic beams to monitor the cross-sectional flow. As shown in the figure below, beam 1 and beam 2 are respectively at an angle of 25 degrees from the vertical direction, which is used to measure the flow velocity on the vertical line, and beam 4 is vertically downward, which is used to measure the position and water depth of the bed; Compensation for shallow water flow rate.
 
During the use of Qliner2, the user needs to first determine the vertical line of the river section, use the rope to drag the boat along the determined route, and stay on each vertical line for 30 seconds to 1 minute in order to obtain stable and accurate measurement results, the usual section The measurement can be completed within 5-20 minutes with an accuracy higher than 1%.
 
Application range
 
-Flow measurement of small and medium-sized rivers
-Open channel flow measurement
-Cross-section flow measurement with bridge
-Replacement of traditional flow measurement methods
-Law of online flow monitoring system
 
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Technical index
Flow rate
Flow rate range ±10 m/s
Accuracy 1% reading or 0.5 cm / s
Sampling Rate 1 Hz
Beam frequency 1 MHz
2 MHz
Depth range 20m
10m
Measuring unit length 0.3 – 4 m
0.1 – 2 m
Minimum blind spot 0.2 m
0.05 m
Number of measuring units 40
40
temperature
Range -4 – 40 ℃
Accuracy / resolution 0.1/0.01 ℃
Software (for PDA)
operating system Windows Mobile, Chinese operation software
Features Layout plan, data repair, ASCII conversion, online data collection, graphic display
Software (for ordinary PC)
Features View data, data storage and export
wireless connection
frequency 2.4 GHz
Types of Bluetooth
Effective range 150 m
battery
Types of Rechargeable battery pack
Voltage 12 V DC
duration 1 day
boat
Material glass fiber
size 940×470×223 mm
weight 11 kg (including sensor)
surroundings
Operating temperature -5 – 40 ℃
storage temperature
 
  -20 – 45 ℃
Shockproof level IEC 721-3-2
Protection level IP 68

 

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