BURIED SENSOR SYSTEM
    45.
    发明申请

    公开(公告)号:US20180013048A1

    公开(公告)日:2018-01-11

    申请号:US15203710

    申请日:2016-07-06

    摘要: A sensing system including in-ground sensors not requiring battery power. A thermoelectric generator sensor rod includes an upper thermal contact and a lower thermal contact at or near its two ends. When the thermoelectric generator sensor rod is buried in the ground with one end buried more deeply than the other, a temperature gradient in the soil produces a temperature difference between the upper thermal contact and the lower thermal contact. The upper thermal contact and the lower thermal contact are thermally connected to a thermoelectric generator, e.g., by heat pipes or thermally conductive rods. Electrical power generated by the thermoelectric generator powers sensors for monitoring conditions in the ground, and circuitry for transmitting sensor data to a central data processing system.

    Redundantly powered and daisy chained power over ethernet

    公开(公告)号:US09787482B2

    公开(公告)日:2017-10-10

    申请号:US14884307

    申请日:2015-10-15

    IPC分类号: H04L12/10

    CPC分类号: H04L12/10

    摘要: According to one aspect, embodiments of the invention provide a method for providing power to a distributed sensor system, the method comprising providing power from at least one port of an interface unit to a first port of a first sensor unit of at least one of a plurality of sensor strings, powering up the first sensor unit, forwarding power from a second port of the first sensor unit to a first port of a second sensor unit of the at least one of the plurality of sensor strings, powering up the second sensor unit, monitoring the plurality of sensor strings for a fault condition, and in response to detecting a fault condition in a first sensor string of the plurality of sensor strings, providing power from a second one of the plurality of sensor strings to the first sensor string.

    METHODS AND APPARATUS FOR IMPROVED SENSOR VIBRATION CANCELLATION

    公开(公告)号:US20170108374A1

    公开(公告)日:2017-04-20

    申请号:US14885289

    申请日:2015-10-16

    IPC分类号: G01J1/02

    CPC分类号: G01J1/0295 G01J1/42

    摘要: Infrared sensing systems having improved vibration cancelation, and methods of achieving improved vibration cancelation. In one example, an infrared sensing system includes an infrared sensor configured to produce a sensor output signal representative of a response of the infrared sensor to infrared excitation and vibration excitation, an accelerometer configured to provide an acceleration signal responsive to the vibration excitation, and a controller, including an adaptive digital filter, coupled to the infrared sensor and to the accelerometer, and configured to receive the acceleration signal and to adjust coefficients of the adaptive digital filter so as to minimize coherence between a residual signal and the acceleration signal, the residual signal being a difference between the sensor output signal and a filter output signal from the adaptive digital filter.