摘要:
A transducer assembly includes an acoustic sensor element and an acoustic waveguide. The acoustic waveguide includes a rotatable acoustic coupler, a tube, and a foot. The foot has a mounting surface that is mountable on a fluid conduit. A circuit assembly couples to acoustic sensor element and provides a diagnostic output.
摘要:
A process fluid flow device includes a power supply module, a process communication module, a processor and measurement circuitry. The process communication circuitry is coupled to the power supply module and to the processor. The measurement circuitry is operably coupleable to plurality of process variable sensors to obtain an indication of differential pressure, static pressure and process fluid temperature. The processor is configured to compute process fluid mass flow, and to use the static pressure and process fluid temperature to obtain an energy per unit mass value relative to the process fluid and to provide an energy flow indication.
摘要:
Le circuit détecteur de glace (10) permet de détecter un dépôt de glace sur une surface de détection (14) d'une sonde de détection de glace (12) à partir d'un écoulement d'une masse d'air. La sonde (12) comprend un élément de chauffage (16) qui chauffe la surface de détection (14) et un détecteur de température (18) pour détecter la température de la surface de détection pendant le chauffage. Le détecteur de température (18) fournit au circuit (10) un signal de sortie ayant un niveau variant en fonction de la température de la surface de détection. Le circuit (10) comprend un organe de commande (24) qui excite sélectivement l'élément de chauffage (16), une minuterie (26) qui fournit un signal de minutage représentatif d'un intervalle de temps qui s'est écoulé entre les niveaux de sortie sélectionnés du détecteur de température, ainsi que des moyens de calcul (28) tels qu'un microprocesseur qui calcule une sortie représentative du dépôt de glace en fonction d'une relation prédéterminée entre le dépôt de glace et la sortie de minutage.
摘要:
A sensor tube for protecting a sensor inserted into a moving process fluid is provided. The sensor tube includes a process interface section for mounting to a process vessel and an extended section extending from the process interface section to a sealed end. The extended section includes a twisted section having a longitudinal axis. The process interface section and the extended section define a sensor bore configured to receive a sensor therein. The twisted section has a cross section that includes at least three equally sized walls and wherein the walls form helixes along the longitudinal axis of the twisted section.
摘要:
A process transmitter (200) includes at least one sensor (202) which monitors a process variable, and analog-to-digital (A/D) converter circuitry (204) coupled to the at least one sensor and configured to provide process variable data indicative of process variable values. A digital signal processor (DSP) (210) is coupled to the A/D converter circuitry (204) to receive the process variable data. The DSP comprises a co-processor (215) configured to receive and perform calculations on the process variable data from the A/D converter circuitry (204) to generate output data. Communications circuitry (250, 280) of the process transmitter is configured either to control communication over loop wiring (145) which can be coupled to the process transmitter, or to control wireless communications with the process transmitter. A microprocessor (230), separate from the co-processor of the DSP (210), is coupled between the co-processor (215) and the communications circuitry to control movement of the output data from the DSP to the communications circuitry.
摘要:
A diagnostic device for testing a piezoelectric sensor (10) includes an AC source (32) configured to apply an AC signal to the piezoelectric sensor (10) at two or more different frequencies. The response of the piezoelectric sensor (10) can be measured (48) and used for diagnostics (52).