Hybrid power module with fault detection
First Claim
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1. A wireless field device assembly comprising:
- a process sensor configured to monitor a process variable and produce a sensor signal;
a housing enclosing an interior space of the wireless field device;
a power module comprising an energy storage device and a connection to a local power source, and configured to be housed in the wireless field device and power the wireless field device via at least one of the energy storage device and the local power source;
a processor powered by the power module, located within the interior space, and configured to produce a fault signal value that distinguishes between energy storage device faults, local power source faults, and no-fault states.
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Abstract
A wireless field device assembly comprises a process sensor, a housing, a power module, and a processor. The process sensor is configured to monitor a process variable and produce a sensor signal. The housing encloses an interior space of the wireless field device. The power module comprises an energy storage device and a connection to a local power source, and is configured to be housed in the wireless field device. The processor is located within the interior space, and is powered by the power module. The processor produces a fault signal value used to differentiate between energy storage device faults, local power source faults, and no-fault states.
39 Citations
33 Claims
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1. A wireless field device assembly comprising:
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a process sensor configured to monitor a process variable and produce a sensor signal; a housing enclosing an interior space of the wireless field device; a power module comprising an energy storage device and a connection to a local power source, and configured to be housed in the wireless field device and power the wireless field device via at least one of the energy storage device and the local power source; a processor powered by the power module, located within the interior space, and configured to produce a fault signal value that distinguishes between energy storage device faults, local power source faults, and no-fault states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 20, 21)
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14. A method for providing and monitoring power for a wireless field device, the method comprising:
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connecting a power module so as to provide power to the wireless field device, the power module comprising an energy storage device and a local power source connection; powering the wireless field device primarily using power from the local power source connection; powering the wireless field device supplementally using power from the energy storage device, when power from the local power source is unavailable or insufficient to power the wireless field device; setting a fault signal value of a process signal based on voltage supplied by the power module; reporting a fault with the local power source if the fault signal value falls within a first range; and reporting a fault with the energy storage device if the fault signal value falls within a second range. - View Dependent Claims (15, 16, 17, 18, 19, 22)
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23. A wireless field device assembly comprising:
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a process sensor configured to monitor a process variable; a housing enclosing an interior space; a cover defining a receptacle between the housing and the cover; a power module configured to fit removably inside the receptacle and power at least a subset of the wireless device assembly; an energy storage device inside or affixed to the power module, and located within the receptacle; a local power source electrically connected to the power module; a processor located within the interior space and configured to produce; a process variable signal reflecting the process variable monitored by the industrial process sensor; and a fault signal value that distinguishes between energy storage device faults, local power source faults, and no-fault states based on voltage at the power module. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification