Working principle of ultrasonic water level sensor
In short, water depth detection uses sensors to measure the depth of water in a tank or container. Although a variety of sensors can be used for this application, the editor of the gongwang network will introduce you to the application of ultrasonic sensors.
For the detection of water depth, the water depth calculation can be found by the distance between the ultrasonic sensor transceiver and the water surface. The sensor will send a short ultrasonic pulse, measuring the propagation time of the pulse to the liquid and back. Then calculate the distance subtracted from the total depth of the water tank to determine the water depth.
This method of measuring with ultrasonic sensors more accurately describes the water level measurement. Whether in a tank or container, it will produce the same result. It is worth noting that positioning the sensor at a fixed point anywhere where water is stored can facilitate underwater immersion, including greatly increasing the overall life of the sensor.
Common problems of ultrasonic detection of water depth
Is it necessary to seal the back of the sensor to use the sensor?
Since the front of the sensor is IP67 rated, the back of the sensor must be sealed to use the sensor. However, the user still needs to seal the pin part of the sensor. If you add the shielded cable connection option when selecting the sensor, this can be done easily.
If the sonar is not suitable for underwater use, how to install it to make it work underwater?
If you use the analog envelope output, you can use the waveform and look for underwater reflections in the waveform detected by the sensor. This will require periodic sampling of the AD converter, and then the data will show the distance to the target. Some of these customers successfully used the analog voltage output (it reported the wrong distance because the ultrasonic sound waves propagate at different speeds underwater, but they were able to use the measured value with the lookup value).
Ultrasonic sensor application
Ultrasonic water level sensors are not limited to water detection, but can also be used in a variety of applications, including:
Fuel tank level measurement
Diesel fuel metering
Irrigation control
Stream or river water level monitoring
Wet well and pump control
Sea or tidal water level monitoring and tsunami warning
The technical scheme of ultrasonic sensor used underwater
As mentioned above, to use an ultrasonic sensor to truly measure the water depth instead of the water level, we must submerge the sensor in the water. We do not recommend this because our sensors are not designed for underwater use and have not been properly tested in this environment. Although the MaxSonar-WR and MaxSonar-WRC circuits have an IP67 degree of protection and can be submerged within one meter, this violates their intended function and will invalidate the manufacturer's warranty. If submerged, we cannot guarantee normal function.
Aiming at the application of ultrasonic sensors in water depth detection, Gongji.com provides MaxBotix UAV Ultrasonic Sensor-MB7052, which solves the common problems of ultrasonic detection of water depth. The UAV Ultrasonic Sensor MB7052 is an ultrasonic with IP67 protection level. The sensor can protect against dust inhalation and can be soaked for a short time. The PVC material encapsulation has certain anti-corrosion ability. In the outdoor environment where there is clutter interference, the clutter can be well removed and the distance information of the largest target can be obtained. The resolution of the sensor is up to 1cm and the measurable distance is up to 7.65 meters. Therefore, it is a low-power product suitable for outdoor environments, such as unmanned aerial vehicle systems. At the same time, it has also been widely used in the field of battery-powered IoT smart devices.
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USB 3.1 is the latest USB specification, which was initiated by big companies such as Intel. Compared with the existing USB technology, the new USB technology uses a more efficient data encoding system and provides more than twice the effective data throughput (USB IF Association). It is fully downward compatible with existing USB connectors and cables.
USB 3.1 is compatible with existing USB 3.0 software stacks and devices
USB3.1 LOGO
USB3.1 LOGO
Protocol, 5Gbps hubs and devices, USB 2.0 products.
Intel, which owns Thunderbolt technology, also welcomes the formation of the USB 3.1 standard. USB 3.1 contains most of the features of USB 3.0 [2]. USB 3.1, as the next generation of USB transmission specifications, is commonly referred to as "SuperSpeed+", which will replace USB 3.0 in the future. [3]
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