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Main ❯ Underwater acoustic modems ❯ Device specification: uWave
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uWave underwater acoustic modem Device specifications |
KEY FEATURES
- Extremely small size and weight
- Can be applied in underwater wireless sensor networks
- Reliable data transmission with 78 bit/s
- Operating range up to 10001,2 m
- Subscribers code division
- Propagation time measurement
- Reliable and noise-immune technology of digital broadband acoustic communication
- Low power consumption (Rx/Tx) 0.33/6 W
- Open configuration protocol
- Built-in depth/temperature sensor
- Patented monoblock design
DESCRIPTION
uWave is the world smallest3 underwater acoustic digital modem, which allows to communicate up to 20 subscribers in area 1000 x 1000 meters with both transparent channel and predefined code messages/telemetry transmission. Extremely small size, low power consumption and simplicity of usage make uWave an ideal solution for AUV control as well as data transmission, where dimensions and weight are the bottleneck.
The device allows:
- transfer data in transparent channel mode - just connect the modem to a serial port
- request the depth, temperature, supply voltage of remote modems with simultaneous measurement of the signal propagation time (and hence the distance to them)
- transfer data in batch mode with guaranteed delivery (ALO - At-least-once) and delivery notification
- measure immersion depth, water temperature, and supply voltage of local modem.
Devices from uWave family use a simple open NMEA-like configuration protocol, and the supplied open-source libraries uWaveLib (.NET) and uWave ALib (Arduino) allows for the fastest and easiest integration of devices into custom solutions.
TECHNICAL SPECIFICATIONS
| PARAMETER | VALUE |
|---|---|
| DIMENSIONS (Ф х h) | 41 x 45 mm |
| WEIGHT (dry) | 0.16 kg |
| DEPTH RATING | 300 m |
| MAX OPERATING RANGE1,2 | 1000 m |
| PAYLOAD DATA RATE | 78 bit/s |
| POWER CONSUMPTION Rx/Tx | 0.33/6 W |
| POWER SUPPLY4,7 | 5 .. 12 V |
| DATA LINES VOLTAGE | 0 .. 3.3 V |
| DATA LINES OUTPUT IMPEDANCE | 1 kOhm |
| FREQUENCY BAND | 10 .. 30 kHz |
| ACOUSTIC SOURCE LEVEL (IN BAND) | 169 dB re 1 uPa @ 1 m |
| BIT ERROR RATE | 10-6 |
| SNR5 | -2 dB |
| MAX RELATIVE VELOCITY | +/- 1 m/s |
| RATED START-UP TIME | 100 ms |
| OPERATING TEMPERATURE RANGE | -5 .. 50 °C |
| INTERFACE6 | UART 9600 bit/s |
| CONFIGURATION PROTOCOL | NMEA0183 PUWV |
| CABLE LENGTH6 | 0.5 m |
| CABLE DIAMETER | 5 mm |
| SUBSCRIBERS CODE DIVISION | 20 code channels |
| COMMAND MODE | 16 predefined messages (9 for user applications) |
| PACKET MODE | 254 subscribers with an acknowledgement; broadcasting; packet size up to 64 bytes |
| TX BUFFER SIZE | 127 bytes |
| PROPAGATION TIME MEASUREMENT RESOLUTION | 0.0001 sec |
1 A parameter that determines the maximum range at which a signal can be received based on the electro-acoustic parameters of the transmitter and receiver, spatial decrease in the intensity of sound energy, attenuation in the medium and acoustic noise level.
2 Based on the test results in a shallow water body, using the uWave devices, the practical communication range 1092 m was obtained.
3 According to open sources, June 2021.
4 Maximum output power can be achieved with 12V power supply.
5 This value is obtained without the presence of the multipath effect.
6 Сan be changed by special request.
7 The device has built-in overvoltage protection of the amplifying circuit. At voltages over 12.8-13 volts, the device does not turn on the power amplifier, i.e. does not allow data transfer.
8 Considering the given value, the resolution when measuring the distance, considering the speed of sound 1500 m/s is 0.15 m