Sensor system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsMark E Paulus, Daniel A Gentile, Kevin D Jones, Kyler D Callahan, Paul R Leary, Vladimir N Dobrokhodov, Kevin B Smith
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Abstract
Devices, systems and methods are provided for low-power and high-sampling rate of analog signals received from sensors transported by host devices. The devices, systems and methods may be adapted to utilize GPS and PPS signals for synchronization with digitized signals generated based on the sampling of the analog signals that are simultaneously received and processed by multiple channels. Synchronized data packets may be recorded by the disclosed data acquisition systems, and may be further transmitted to host devices and remote devices.
Claims89
A data acquisition system, comprising:
- an analog anti-alias filter circuitry configured to filter analog signals and generate filtered analog signals based on the analog signals, wherein the analog anti-alias filter circuitry comprises a plurality of analog anti-alias filter circuits;
- an analog-scaling circuitry configured to generate scaled analog signals based on the filtered analog signals, wherein the analog-scaling circuitry comprises a plurality of analog-scaling circuits;
- a sampling circuitry configured to generate digitized signals based on the scaled analog signals, wherein the digitized signals comprise a digital sampling of the scaled analog signals;
- a digital-filter circuitry configured to filter the digitized signals and generate filtered digital signals based on the digitized signals;
- a digital-scaling circuitry configured to generate scaled digital signals based on the filtered digital signals;
- a synchronization circuitry configured to synchronize Pulse Per Second (PPS) signals and the scaled digital signals and the scaled analog signals, wherein the scaled digital signals are synchronized with the scaled analog signals, and wherein the PPS signals are synchronized with both the scaled analog signals and the scaled digital signals, whereby the synchronization circuitry generates synchronized signals;
- a circuit card assembly comprising an analog-to-digital converter (ADC);
- and,
- a microcontroller connected to a GPS receiver and a removable memory medium, wherein the microcontroller receives GPS data and the PPS signals from the GPS receiver, wherein the microcontroller generates a data packet based on the synchronized signals, wherein the data packet is configured to be transmitted to a host device, wherein microcontroller encodes the data packet for transmission via a RS-485 bus, wherein microcontroller synchronizes the encoded data packet and the GPS data and the PPS signals, wherein the microcontroller stores the synchronized data packet on the removable memory medium.
A non-transitory computer-readable medium including instructions configured to be executed by a processor adapted to control operations of a data acquisition system, wherein the executed instructions are adapted to cause the processor to:
- receive scaled digital signals from a four-channel analog-to-digital converter (ADC), wherein the ADC is connected to a microcontroller, wherein the microcontroller is further adapted to connect to a removable memory medium, wherein the ADC comprises a digital-scaling circuitry configured to generate the scaled digital signals based on filtered digital signals, wherein the filtered digital signals are generated by a digital-filter circuitry of the ADC based on the digitized signals generated by a sampling circuitry of the ADC, wherein the digitized signals comprise a digital sampling of scaled analog signals, wherein the scaled analog signals are generated by an analog-scaling circuitry based on filtered analog signals, wherein the filtered analog signals are generated by an analog anti-alias filter circuitry based on analog signals, wherein the analog signals are based on acoustic signals detected by a sensor, wherein the analog signals are received from the sensor;
- receive digital data via a sensor transceiver connected to the sensor, wherein the microcontroller is connected to the sensor transceiver, wherein microcontroller receives the digital data and the scaled digital signals, wherein the digital data is based on non-acoustic data received from the sensor;
- synchronize the scaled digital signals with the digital data, whereby the synchronizing step generates synchronized data;
- generate a data packet based on the synchronized data, wherein the data packet is configured to be transmitted to a host device;
- encode the data packet for transmission via a RS-485 bus;
- receive Global Positioning System (GPS) data and Pulse Per Second (PPS) signals from a GPS receiver, wherein the GPS receiver is adapted to transmit the GPS data to the microcontroller and the PPS signals to the ADC and the microcontroller;
- synchronize the encoded data packet with the GPS data and the PPS signals;
- and,
- store the synchronized data packet on the removable memory medium.
Dependencies are inferred from the claim text.