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公开(公告)号：AU2014268621B2
公开(公告)日：2019-07-04
申请号：AU2014268621
申请日：2014-05-21
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , DAVIS DALE SCOTT , SCHULTE JOHN P
IPC: G06F21/30
Abstract: During manufacturing a unique encrypted authentication code is created for each product 12 based upon device specific information relating to that product 12. The unique encrypted authentication code together with the device specific information is stored in a database 23, and a representation 14 of the unique encrypted authentication code is stored on the product. To determine whether a product in question is authentic, the readable representation 14 of the unique encrypted authentication code is read and sent to a server 22 along with a request for product authentication. The server 22 provides an indication of authenticity of the product 14 in question based upon the unique encrypted authentication code received and the device specific information associated with that unique encrypted authentication code in the database 23.
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42.发明专利
公开(公告)号：DE10393130B4
公开(公告)日：2019-01-24
申请号：DE10393130
申请日：2003-07-28
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P
Abstract: Druckmeßvorrichtung (10) zum Erfassen von Druck in einem industriellen Prozeß mit:einer digitalen Taktschaltung (22), die Erregungstaktimpulse (24, PHO) und Steuerausgangssignalimpulse (26, PH1) bereitstellt, die phasenverschoben zu den Erregungstaktimpulsen sind;einem ersten Integrator(30), der einen von den Steuerausgangssignalimpulsen (26, PH1) gesteuerten ersten Schalter (32), einen ersten Verstärker (34) und einen mittels Fluid an dem industriellen Prozeß ankoppelbaren kapazitiven Druckmeßwandler umfaßt und eine erste Druckerfassungskapazität (36) aufweist, die elektrisch in einen Verstärkerrückkopplungspfad (38) zwischen einem Ausgang (40) des ersten Verstärkers (34) und einem Eingang des ersten Verstärkers (34) angeschlossen ist,wobei der erste Schalter (32) eine Verbindung über der ersten Druckerfassungskapazität (36) erzeugt; wobei der Verstärker (34) ein den Druck repräsentierendes Ausgangssignal erzeugt, und die Steuerausgangssignalimpulse den Ausgang des ersten Verstärkers zurückstellen;einer ersten Bezugskapazität (47), die gegenüber dem Druck unempfindlich ist, und die Erregungstaktimpulse (24, PHO) mit dem Eingang (42) des ersten Verstärkers (34) verbindet; ferner mit:einer Summierschaltung (46), welche das Ausgangssignal des ersten Verstärkers (34), das durch die Steuerausgangssignalimpulse zurückgestellt wird, und ein erstes Bezugspotential aufnimmt; wobei die Summierschaltung (46) ein den Druck repräsentierendes Ausgangssignal (52) der Summierschaltung (46) erzeugt.
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公开(公告)号：CA2800660C
公开(公告)日：2016-07-05
申请号：CA2800660
申请日：2011-05-09
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P
IPC: G05B19/042
Abstract: A process field device (104) for use in monitoring or controlling an industrial process includes first and second loop terminals (162, 164) configured to couple to a two- wire industrial process control loop (108). Field device circuitry (168) is configured to monitor or control a process variable of the industrial process. The field device circuitry (168) is powered by power connections from the two-wire industrial process control loop (108). A current regulator (220) is connected in series with the two-wire industrial process control loop (108), the first and second loop terminals (162, 164) and the field device circuitry (168). A voltage regulator (282) is connected in parallel with the current regulator (220) and in series with the two-wire industrial process control loop (108), first and second loop terminals (162, 164) and field device circuitry (168).
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公开(公告)号：CA2804988C
公开(公告)日：2016-01-12
申请号：CA2804988
申请日：2011-06-01
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P , TYSON DAVID G , KLOSINSKI ANDREW J
Abstract: A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body (56) having a cavity (132, 134) formed therein and first and second openings to the cavity configured to apply first and second pressures (PI, P2). A diaphragm (106) in the cavity separates the first opening from the second opening and is configured to deflect in response to a differential pressure between the first pressure and the second pressure. A capacitance based deformation sensor (59) is provided and configured to sense deformation of the sensor body in response to a line pressure applied to the sensor body.
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公开(公告)号：DE10393130T5
公开(公告)日：2005-08-25
申请号：DE10393130
申请日：2003-07-28
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P
Abstract: A pressure measurement device that has a digital clock circuit that provides an excitation clock and a control output. An integrator includes a switch controlled by the control output, an amplifier, and a pressure sensing capacitance coupled in an amplifier feedback path. The switch connects across the first pressure sensing capacitance. A reference capacitance that is insensitive to the pressure couples between the excitation clock and the amplifier input. An amplifier output represents the pressure.
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Patent Agency Ranking
公开(公告)号：RU2137145C1
公开(公告)日：1999-09-10
申请号：SU5011333
申请日：1990-08-30
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
Abstract: FIELD: measurement technology; analog-to-digital conversion. SUBSTANCE: circuit has switch- over unit, charge storage unit, computing device, pulse generator, switch-over control device, storage capacitors, and storage capacitor selector. Quantity of shaped sets of charges and bits is controlled by varying value of storage capacitors. EFFECT: improved speed and resolving power. 14 cl, 2 dwg
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公开(公告)号：SG49261A1
公开(公告)日：1998-05-18
申请号：SG1996008507
申请日：1992-10-13
Applicant: SEEMAN BRIAN , ROSEMOUNT INC
Inventor： SCHULTE JOHN P , LYLE E LOFGREN
Abstract: A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance MACDA or a digital removable module having compensation capacitance CDD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance CDM which is selected whereby MACDA equals CDD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
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公开(公告)号：CA2233018A1
公开(公告)日：1997-04-03
申请号：CA2233018
申请日：1996-09-13
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P , TEWFIK AHMED H , FRICK ROGER L
Abstract: A transmitter (10) in a process control system includes input/output circuitry (74) for coupling to a process control loop (12). A first sensor (40L) having a first impedance is responsive to a first sensed parameter. A second sensor (40H) having a second impedance is responsive to a sensed parameter. First and second excitation signals (S1, S2) are applied to the first and second sensors (40L, 40H). A summing node (44) sums the outputs (OL, OH) of the first and second sensors (40L, 40H). An analog to digital converter (54) provides a digital output representative of the summed signals. Digital signal processing circuitry (70) coupled to the analog to digital converter (54) provides an output related to the outputs (OL, OH) of the first and second sensors (40L, 40H) to the input/output circuitry (72) for transmission over the process control loop (12).
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公开(公告)号：PL167348B1
公开(公告)日：1995-08-31
申请号：PL28710690
申请日：1990-09-28
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
Abstract: A voltage-to-digital converter comprising a storage circuit for providing a storage capacitance with a plurality of selectable magnitudes. The storage circuit provides a charge output representative of applied voltage input signals and the selected capacitive magnitude. A charge accumulation circuit is coupled to the charge output. The total charge accumulated is proportional to the integral of the amount of charge discharged from the storage circuit. The charge accumulation circuit provides a balance output representative of a comparison of the accumulated charge and a reference charge. A control circuit is coupled to the balance output for providing feedback signals as functions of the balance output for periodically charging and discharging the storage capacitance whereby a first sequence of charge packets is provided on the charge output for driving the accumulation of charge toward the reference within a first set of limits when a first capacitive magnitude is selected in the storage circuit and whereby a second sequence of charge packets is provided on the charge output for driving the accumulation of charge toward the reference charge within a second set of limits when a second capacitive magnitude is selected in the storage circuit. A calculation circuit is coupled to the feedback circuit for counting the number of charged packets generated in a measurement cycle. An output circuit provides an output indicative of the voltage input signals as a function of the number of packets counted.
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公开(公告)号：HK104395A
公开(公告)日：1995-07-07
申请号：HK104395
申请日：1995-06-29
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
Abstract: A transmitter provides an output representative of a parameter. A generating circuit in the transmitter senses the parameter and provides charge packets having adjustable magnitudes to a measurement circuit. The measurement circuit measures the quantity of charge and provides a measurement signal representing the charge to a feedback circuit. The feedback circuit is controlled by the measurement signal and provides timed feedback signals to the generating means. The feedback signals control the generation and magnitude of the charge packets such that the charge coupled to the measurement circuit is finely balanced in a short measurement interval. The feedback means counts the number of charge packets provided during a measurement interval such that the numbers counted are representative of the sensed parameter.
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