Distributed low-power wireless monitoring
First Claim
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1. A method implemented by a remote data acquisition platform in a distributed wireless monitoring system, the method comprising:
- receiving over a wireless internet link from a cloud server a difference threshold for event triggering, a sampling interval, a sensor baseline value, a reporting schedule, sensor calibration information, and current time and date information;
sampling by comparators at the sampling interval a sensor value;
activating a data logger if the comparators sense a differential change in the sensor value exceeding the difference threshold for event triggering;
logging the sensor value together with a timestamp as stored data while the data logger is activated;
deactivating the data logger and entering a sleep mode if the sensor value returns to the sensor baseline;
compression encoding the stored data;
transmitting the compression encoded stored data over the wireless internet link to the cloud server according to the reporting schedule;
receiving over the wireless internet link from the cloud server a device control parameter;
sending a control signal to a device actuator based on the received device control parameter.
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Abstract
A distributed wireless monitoring system with low-power remote sensors includes data encoding/compression at sensors to reduce power use from transmission and storage, event activated operation/data logging, remote configuration of event triggering thresholds and correlation templates, distributed processing capabilities, and sensor clock synchronization from a network time service.
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Citations
8 Claims
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1. A method implemented by a remote data acquisition platform in a distributed wireless monitoring system, the method comprising:
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receiving over a wireless internet link from a cloud server a difference threshold for event triggering, a sampling interval, a sensor baseline value, a reporting schedule, sensor calibration information, and current time and date information; sampling by comparators at the sampling interval a sensor value; activating a data logger if the comparators sense a differential change in the sensor value exceeding the difference threshold for event triggering; logging the sensor value together with a timestamp as stored data while the data logger is activated; deactivating the data logger and entering a sleep mode if the sensor value returns to the sensor baseline; compression encoding the stored data; transmitting the compression encoded stored data over the wireless internet link to the cloud server according to the reporting schedule; receiving over the wireless internet link from the cloud server a device control parameter; sending a control signal to a device actuator based on the received device control parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification