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Main ❯ Educational projects ❯ ACubes A3R: Device specification
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ACubes A3R Device specification |
KEY FEATURES
- Ideal solution for educational projects and learning
- Compatibility with A3T modules
- Stackable up to 12 units
- Low power consumption - 20 mA
DESCRIPTION
ACubes A3R is a single-frequency underwater acoustic receiver module with logic output. A3R devices can be combined with the pulse transmitter A3T and share a single underwater acoustic transceiving transducer. Devices can also be stacked up to 12 units, and each such stack can be combined with one transmitter. In this case, each receiver and transmitter uses a separate transducer.
The following transducers can be used:
- R-1.d3505-1 - receiving transducer based on a plate piezoelectric element
- RT-1.332820-1 - compact transceiving transducer
- RT-2.332820-1 - dual-element transducer with enhanced sensitivity for operation from the surface
- RT-1.524525-1 - transducer with enhanced sensitivity
TECHNICAL SPECIFICATIONS
| PARAMETER | VALUE |
|---|---|
| DIMENSIONS | 100 x 50 x 10 mm |
| WEIGHT | 0.015 kg |
| MAXIMUM ACOUSTIC COMMUNICATION RANGE1 | 300 m |
| POWER CONSUMPTION | 20 mA |
| SUPPLY VOLTAGE | 5 .. 15 V |
| DATA LINE VOLTAGE | TTL/LVTTL (0 .. 3.3/0 .. 5) V |
| CARRIER FREQUENCY | 25000 Hz |
| LOCKOUT INTERVAL AFTER SIGNAL DETECTION | 100 ms |
| MAXIMUM RELATIVE VELOCITY | +/- 2 m/s |
| OPERATING TEMPERATURE RANGE | -5 .. 50 °C |
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, the spatial decrease in the intensity of sound energy, attenuation in the medium and the level of underwater acoustic noise.
PINOUT AND CONNECTION
| A3R pad layout and functions |
CONNECTOR XS1
| PIN NUMBER | I/O | FUNCTION |
|---|---|---|
| 1 | I | Transducer input |
| 2 | - | GND |
| 3 | - | GND |
| 4 | I | Connected to pin No. 1 |
CONNECTOR XS2
| PIN NUMBER | I/O | ACTIVE STATE | FUNCTION |
|---|---|---|---|
| 1 | - | - | GND |
| 2 | O | 0 | Transmission start strobe |
| 3 | - | - | GND |
| 4 | I | 0 | Pulse transmission trigger |
| 5 | - | - | GND |
| 6 | O | 0 | Receiver No. 1 strobe |
| 7 | - | - | GND |
| 8 | O | 0 | Receiver No. 2 strobe |
| 9 | - | - | GND |
| 10 | O | 0 | Receiver No. 3 strobe |
| 11 | - | - | GND |
| 12 | O | 0 | Receiver No. 4 strobe |
| 13 | - | - | GND |
| 14 | O | 0 | Receiver No. 5 strobe |
| 15 | - | - | GND |
| 16 | O | 0 | Receiver No. 6 strobe |
| 17 | - | - | GND |
| 18 | - | - | NC |
| 19 | - | - | GND |
| 20 | - | - | +Usupply |
CONNECTOR XS3
| PIN NUMBER | I/O | ACTIVE STATE | FUNCTION |
|---|---|---|---|
| 1 | O | 0 | Common receiver strobe |
| 2 | - | - | GND |
| 3 | - | - | Reserved |
| 4 | - | - | GND |
| 5 | O | 0 | Receiver No. 7 strobe |
| 6 | - | - | GND |
| 7 | O | 0 | Receiver No. 8 strobe |
| 8 | - | - | GND |
| 9 | O | 0 | Receiver No. 9 strobe |
| 10 | - | - | GND |
| 11 | O | 0 | Receiver No. 10 strobe |
| 12 | - | - | GND |
| 13 | O | 0 | Receiver No. 11 strobe |
| 14 | - | - | GND |
| 15 | O | 0 | Receiver No. 12 strobe |
| 16 | - | - | GND |
| 17 | - | - | Reserved |
| 18 | - | - | GND |
| 19 | - | - | +Usupply |
| 20 | - | - | GND |
CONNECTOR XS4
| PIN NUMBER | I/O | FUNCTION |
|---|---|---|
| 1 | O | Preamplifier output |
| 2 | O | Connected to pin No. 1 |
| 3 | - | Reserved |
CONNECTOR XP2
| PIN NUMBER | I/O | FUNCTION |
|---|---|---|
| 1 | I | 5 .. 15 V |
| 2 | - | GND |
SWITCHES (JUMPERS) P0 - P12
Switch P0 - Responder mode
The jumper connects pin 1 (Common receiver strobe) of connector XS3 and pin 4 (Pulse transmission trigger) of connector XS2. Thus, if the jumper is installed and the A3R module is paired with the A3T module, then upon receiving an acoustic signal, a response pulse transmission will be triggered.
Switch P0 controls enabling and disabling of the responder mode for paired A3R and A3T modules.
Switches P1 - P12 - Bus address
These switches allow routing the receiver strobe to a specified line of the bus formed by connectors XS2 and XS3. This function can be used when interfacing multiple receivers with individual receiving transducers to enable output of the signal from each receiver to different bus lines.