What is the MEMS-based multi-sensor observation system?
Compared with many traditional devices, MEMS sensor has the advantages of small size and high sensitivity, and high integration is also an important advantage. Using advanced MEMS manufacturing technology, it is possible to integrate multiple sensors on a single chip and observe various data at the same time. CTD equipment is a typical multi-sensor system, usually integrated with temperature sensors, conductivity sensors and pressure sensors. Compared with CTD equipment using traditional sensors, MEMS-based CTD equipment has lower power consumption and higher sensitivity and Resolution. At the same time, MEMS-based CTD equipment also has a very small size, which makes it not only used as a separate ocean observation equipment, but also can be combined with other ocean observation equipment to form a more functional ocean observation system.
Ocean observation buoys are usually also multi-sensor systems, because the buoy itself is relatively large and can often integrate multiple sensors as needed. The wave measuring buoy designed with MEMS inertial sensor and geomagnetic sensor, its MEMS sensor has extremely low power consumption and extremely small size. Among them, the power consumption of MEMS inertial sensor is less than 400μW, including the package and PCB board. Cm size. In addition to being used for wave observation, the observation buoy can also collect other required data at the same time, such as temperature and salinity. Because of the low power consumption and small size of MEMS sensors, marine buoy observation systems generally have sufficient space and power supply, and the required sensors can be configured flexibly and freely. At the same time, the buoys arranged in a relatively close range can also communicate with each other wirelessly to form a wireless sensor network.
MEMS sensors have a high degree of integration, and multi-sensor systems can also be integrated in a small volume. Because of this feature, MEMS multi-sensor systems can be used in a wider range of fields than traditional sensors. Marine animal tags are a kind of full use Researchers have conducted a lot of research on marine animal tags for marine observation instruments with the advantage of high integration of MEMS sensors. Marine animal tag is a small tag device that includes MEMS sensor, data acquisition and control circuit, communication circuit (active or passive tag) and power supply. It is usually only a few centimeters in size including the package and can be fixed on fish. It does not affect the activities of the fish. When the marked fish is caught again, the data stored in the tag is read through the radio frequency reading device. This tag is usually used in fishery and ecological research. Anders Hyldg rd of the Department of Micro and Nano Technology at the Technical University of Denmark and others have designed a multi-sensor tag for fishery research. The multi-sensor system includes temperature, salinity, pressure, and light-sensitive sensors, all of which are integrated in a chip, and the size of the sensor chip is only 4×6mm2. The label system also includes a control chip, a memory, a radio frequency label, and a power supply. These modules are placed on a PCB board and packaged with a potted-tube to seal the circuit part.
The MEMS multi-sensor system has extremely high flexibility and integration. Many different kinds of sensors and control, data processing and storage, communication modules, etc. can be integrated on a PCB board, or even a chip. Different devices can be customized according to application requirements, and the application range is very wide.
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