Ultrasound Sounder Working Principle
The working principle of the ultrasonic depth sounder is designed based on the principle that the ultrasonic energy is transmitted in a uniform medium in a uniform medium and reflected in different media surfaces. The ultrasonic depth sounder uses the water body as the ultrasonic medium, and places the ultrasonic transducer at a certain position in the underwater when the depth is measured. The depth of the transducer to the bottom of the water can be transmitted according to the speed of the ultrasonic wave in the water and the ultrasonic signal is transmitted to the receiver. The time interval is calculated.
Performance requirements 1, resolution
Resolving power: 1 cm, 2cm, 5cm in different water depth detection ranges.
2, water depth detection range
Water depth detection range: points (0 ~ 20) m, (0 ~ 50) m, (0 ~ 100) m third gear.
3, blind area
Blind area: corresponding to 0.5m, 1.0m, and 1.5m in different water depth detection ranges.
4, measurement error
Within the scope of measurement, the results measured at normal temperature and fixed reflection target shall prevail:
a) When the water depth is less than 5m, the measurement error should not exceed ± 0.05m;
b) When the water depth is greater than 5m, the measurement error should not exceed ± 1%.
Other properties should meet the requirements of SL/T185-1997.
5, repeatability
The repeatability error should not be greater than 0.5 times the sounder's measurement error.
6, reproducibility
The reproducibility error should not be greater than 1.5 times the sounder's measurement error.
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