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43 results about "Process instrumentation" patented technology

Computer Assisted Knee Arthroplasty Instrumentation, Systems, and Processes

Instrumentation, systems, and processes for tracking anatomy, instrumentation, trial implants, implants, and references, and rendering images and data related to them in connection with surgical operations, for example total knee arthroplasties (“TKA”). These instrumentation, systems, and processes are accomplished by using a computer to intraoperatively obtain images of body parts and to register, navigate, and track surgical instruments. Disclosed in this document are also alignment modules and other structures and processes which allow for coarse and fine alignment of instrumentation and other devices relative to bone for use in connection with the tracking systems of the present invention.
Owner:CARSON CHRISTOPHER PATRICK +2

Method and system for diagnosing mechanical, electromechanical or fluidic components

There is described a diagnosis method and a system comprising a structure-born noise sensor which transmits, in a bandpass filtered manner, a measuring signal based on the mechanical resonance frequency and capacity thereof and on an inductance and an evaluating device in which the frequency, at which the measuring signal level exceeds a predetermined threshold value, is defined and which is used for producing an error signal, when the frequency exceeds a second predetermined threshold value. As far as the diagnosis performance requires a small number of electronic components and a low power supply, the diagnostic can be integrated into existing devices, in particular into process instrumentation field devised for which a restricted quantity of operating power is available. The method and the system can be used for identifying a valve leakage with the aid of an electro-pneumatic positional regulator.
Owner:SIEMENS AG

Sensor/transmitter plug-and-play for process instrumentation

A sensor assembly with a sensing element sends a sensor signal from the sensing element to attached process transmitter over sensor connection wires. The sensor assembly has memory circuitry for storing information related to the sensor assembly and interface circuitry that provides for digital communication of the stored information with the attached process transmitter. This digital communication is sent over the sensor connection wires.
Owner:ROSEMOUNT INC

Field Device Having an Analog Output

A field device having an analog output, i.e., a measuring transducer, for process instrumentation having a 4-20 mA interface as the analog output. For digital-to-analog conversion, a digital value is split into a digital coarse portion and a digital fine portion. Depending on the digital coarse portion, a first analog signal is generated using a pulse width modulator having a downstream mounted low path filter and a signal above the analog output signal, and a second output signal using a pulse width modulator also having a downstream mounted low path filter with a signal below the analog output signal. The analog signals are supplied to a third pulse width modulator controlled with the digital fine portion, where a low-pass filter (TP3) is downstream mounted. As a result, an analog output signal is provided having a high resolution and good dynamic properties. In addition, the field device is provided with a digital-to-analog converter that can be produced having minimal complexity.
Owner:SIEMENS AG

Field Device for Process Instrumentation

A field device for process instrumentation comprising a measurement transducer having an analog output to which a two-wire line can be connected for transmitting an analog output signal, wherein a unit galvanically separates the processor from an analog output circuit. A read-back channel for a pulse-width modulated digital signal, which is tapped behind an element for galvanic separation, is provided for monitoring generation of the analog output signal, and a unit is provided for monitoring the analog output signal to maintain a specifiable maximum deviation from a reference signal, which is generated in the same manner as the analog output signal by low-pass filtering from the pulse-width modulated digital signal. In the case of transient signals, the monitoring unit advantageously detects error states quickly and appropriate measures for reacting to the error states can therefore be implemented in less time.
Owner:SIEMENS AG

Field Device for Process Instrumentation

A field device for process instrumentation, in particular a measuring transducer, comprising an analogue output to which a two-wire line is connectable for transmitting an analogue output signal. The output circuit contains a controller with an actuator connected downstream for the analogue output signal. A monitoring unit monitors whether an actuating signal remains within a predeterminable value range to monitor the output circuit for correctly setting the loop current. If the actuating signal is outside the value range, an indicator signal is output to a computing unit so that suitable measures can be introduced in response to an error state that has thus been identified.
Owner:SIEMENS AG

Method and system for diagnosing mechanical, electromechanical or fluidic components

There is described a diagnosis method and system comprising a sensor for structure-borne noise which emits a measuring signal in a bandwidth-filtered manner due to its mechanical resonant frequency, its capacity and an inductance. The system also comprises an evaluation device in which the measuring signal is subsampled measuring signal exceeds a defined threshold value. The system requires only a small number of electronic components and only little power supply capacity, thereby allowing diagnosis to be carried out without complication in existing devices, especially in field devices of process instrumentation for which only a limited amount of operating power is available. The method and system are especially advantageous for the recognition of valve leakage with an electropneumatic position controller.
Owner:SIEMENS AG

Gas phase polyethylene device quality index and operational constraint on-line estimation system and method thereof

The invention provides a polyethylene (PE) multi-trademark product quality index and operational constraint on-line estimation system for gas phase fluidized bed production technology. The system comprises a field process instrument which is connected with a gas phase PE object, a field analysis instrument, a distributed control system (DCS), a laboratory analysis data server and an advanced control server. The advanced control server includes an OPC client, a data interface module, a multi-trademark PE production process quality indicator and operational constraint model prediction module, a PE quality index prediction model parameter adaptive correction module, and a PE quality index robustness suboptimal filter estimation and quality indicator and operational constraint display module. The invention also provides a gas phase PE quality index and operational constraint on-line estimation method. The invention provides the real-time online estimation system and method of multi-trademark gas phase PE product quality index melt index and density, gas phase PE production operating constraint yield, and recycle gas dew point temperature.
Owner:BEIJING UNIV OF CHEM TECH

Field Device for Process Instrumentation

A field device for process instrumentation having an interface for connecting a two-wire cable and for outputting measurement values, wherein the interface comprises a series circuit having a transistor circuit by which the loop current is adjustable as a function of a control signal, a power supply, and a device by which the loop current can be captured as an actual value that is fed by a first feedback coupling to a regulator having integrated behavior. The regulator compares the actual value to a target value, and generates a control signal for the transistor circuit. The actual value is fed by a second feedback coupling to a summation point as a compensation signal for generating an input signal for the transistor circuit as a function of the control signal and the compensation signal to suppress interference coupled into the two-conductor line.
Owner:SIEMENS AG

Pressure Sensor Arrangement and Measuring Transducer for Process Instrumentation Having Such a Pressure Sensor Arrangement

A pressure sensor arrangement includes a tube with a diaphragm to pressure to be measured is applied arranged in the cross-section of the tube, wherein the diaphragm is fastened to the tube inner wall via an articulation extending along the circumferential region of the diaphragm, where deformation of the diaphragm results in rotation of the articulation directly on the wall of the tube which can therefore be detected from the outside by suitable structure such that that strain sensors, for example, which can be used to detect deformation are advantageously not in contact with the process medium and there is advantageously no need for a pressure-tight bushing for electrical signals, and where the pressure sensor arrangement has a particularly simple structure and can be advantageously used in measuring transducers for process instrumentation.
Owner:SIEMENS AG

Through-flow Measurement Arrangement and Measuring Transducer for Process Instrumentation Having the Through-flow Measurement Arrangement

A through-flow measurement arrangement and measuring transducer for process instrumentation that includes the through-flow measurement arrangement, wherein the through-flow measurement arrangement operating in accordance with the differential-pressure method includes a tube and an elastically deformable measuring diaphragm arranged in the cross section of the tube and a strain sensor that detects the deformation and converts it into an electric signal, where the measuring diaphragm and the tube are formed in one piece from uniform material, and where both side of the measuring diaphragm each pass into the tube via a fillet groove and the at least one strain sensor is arranged on the circumferential side of the tube opposite the fillet groove.
Owner:SIEMENS AG

Plug-and-play sensor peripheral component for process instrumentation

A plug-and-play sensor peripheral component includes an electrically conductive physical connector; an electrical connector; a transformer; and an RF communication and data storage circuit. The electrical connector is electrically connected to the physical connector by a first conductive path. The transformer is electrically connected to the RF communication and data storage circuit. The transformer and the RF communication and data storage circuit are electrically isolated from the physical connector and the electrical connector. Electrically connecting the physical connector to the electrical connector by other than the first conductive path inductively couples the RF communication and data storage circuit to the first conductive path.
Owner:ROSEMOUNT INC

Measuring Transducer for Process Instrumentation, and Method for Monitoring the Condition of the Sensor Thereof

A measuring transducer for process instrumentation that comprises a sensor for sensing a physical or chemical variable, wherein the sensor includes at least one electrical element embedded in a substrate comprising semiconducting material and is electrically separated therefrom by a blocked PN junction during normal operation. In order to monitor the condition of the sensor, the PN junction is connected in the conducting direction in a test mode, and the electrical property of the PN junction, i.e., the forward voltage, is determined and used to monitor the sensor condition. Additionally, a temperature sensor mounted on the sensor can be monitored by determining, based on the dependence of the forward voltage on the temperature, a comparative value for the temperature sensed by the temperature sensor. If major differences occur, a conclusion can be reached that there is a failure of the sensor, and a corresponding error message can be output over a field bus.
Owner:SIEMENS AG

Pressure sensor assembly and measurement converter for process instrumentation comprising the pressure sensor assembly

A pressure sensor assembly that includes a tube, wherein a membrane to which the pressure to be measured is applied is arranged in the cross-section of the tube, where the membrane has a high flexural rigidity in its central region and is mounted in an elastic manner in the axial direction in the edge region in the tube, two limbs are used to elastically mount the membrane, the mutually facing sides of the two limbs being provided with elongation sensors for detecting an axial movement of the membrane, the movement depending on the pressure to be measured, and where the sensors advantageously do not contact the process medium and a pressure-tight feedthrough for electric signals is not required such that the pressure sensor assembly has a particularly simple structural design and can be used advantageously in measurement converters for process instrumentation.
Owner:SIEMENS AG

Field device having an analog output

The invention relates to a field device having an analog output, especially a measuring transducer (1) for process instrumentation having a 4-20 mA interface as the analog output (7). For digital-to-analog conversion, a digital value is split into a digital coarse portion and a digital fine portion. Depending on the digital coarse portion, a first analog signal (V1) is generated using a pulse width modulator (BUF1) having a low path filter (TP1) mounted downstream thereof, which signal is above the analog output signal (VOUT), and a second output signal (V2) using a pulse width modulator (BUF2) having a low path filter (TP2) mounted downstream thereof, which signal is below the analog output signal(VOUT). Both analog signals (V1, V2) are guided to a third pulse width modulator (SW1) which is controlled depending on the digital fine portion, a low-pass filter (TP3) being mounted downstream thereof. The invention allows provision of an analog output signal (VOUT) having high resolution and good dynamic properties. The field device is further characterized by a digital-to-analog converter that can be produced with especially little complication.
Owner:SIEMENS AG

Measurement transducer for process instrumentation, and method for monitoring the state of its sensor

A measurement transducer for process instrumentation includes a sensor for detecting a physical or chemical quantity, where a supply voltage to the sensor is regulated by a cross regulator to a constant value, and the current intensity of the current adjusted by the cross regulator and flowing parallel to the sensor is determined and monitored to maintain a specified criterion in order to detect a sensor error such that error conditions of the sensor can be determined in a particularly simple and effective way.
Owner:SIEMENS AG
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