Resources Contact Us Home
Variable power control for process control instruments

Image Number 8 for United States Patent #6686831.

A process control instrument includes a sensor/actuator portion and a transmitter portion connected to the sensor/actuator portion. The transmitter portion is operable to communicate with other process variable transmitters through a communication network. The transmitter includes a processing module and a power module operable to generate a power output supplied to at least the transmitter portion, wherein the power module is operable to adjust the power output based on a power control signal. Moreover, the power control signal may be generated by a controller device remote from the process control instrument and communicated to the process control instrument over the communication network. Additionally, the power module includes a power control module for adjusting the power output. This power control module includes an amplitude limiter operable to limit a power input to the process control instrument according to a controllable amplitude limit, and a power rate of change unit operable to limit a rate of change of the power input to the process control instrument according to a controllable adjustment rate limit.

  Recently Added Patents
Organic electroluminescent element
Method for counting and segmenting viral particles in an image
Systems and methods for authorizing, authenticating and accounting users having transparent computer access to a network using a gateway device
Method for forming a semiconductor device using selective epitaxy of group III-nitride
Charging seat having cleaning member
Method for generating multi-antenna signals
Electronic device package and fabrication method thereof
  Randomly Featured Patents
Multilayered device containing a polymer-copper complex to control interference of biological substances in colorimetric test systems
Semiconductor device
Retractable sun visor and full windshield cover
Fancy toothbrush holder
Stomach peristalsis device and method
Signal encoding for transmission of multiple digital signals over single physical medium
Driver assistance system for traffic sign recognition
Surface active agents
Method and apparatus for controlling the cooling power of a cryogenic refrigerator delivered to a cryogen vessel
External sigmoid valve complex frame and valved conduit supported by the same