EP4170236A1 - Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression - Google Patents

Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression Download PDF

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Publication number
EP4170236A1
EP4170236A1 EP21203458.1A EP21203458A EP4170236A1 EP 4170236 A1 EP4170236 A1 EP 4170236A1 EP 21203458 A EP21203458 A EP 21203458A EP 4170236 A1 EP4170236 A1 EP 4170236A1
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EP
European Patent Office
Prior art keywords
pressure
measured
status
value
filtered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21203458.1A
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German (de)
English (en)
Inventor
Pavel Kejik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pittway SARL
Original Assignee
Pittway SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pittway SARL filed Critical Pittway SARL
Priority to EP21203458.1A priority Critical patent/EP4170236A1/fr
Priority to PCT/EP2022/078195 priority patent/WO2023066712A1/fr
Publication of EP4170236A1 publication Critical patent/EP4170236A1/fr
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure

Definitions

  • the invention relates to a method for pressure monitoring a pressure-dependent process. Further on, the invention relates to a pressure sensor.
  • pressure switches are used to provide pressure monitoring.
  • Several pressure switches are needed to monitor if the pressure to be monitored during operation of the pressure-dependent processes is above or below certain pressure levels. For each pressure level an individual pressure switch is needed. This requires high hardware and installation costs.
  • EP 1 000 301 B1 , US 5,732,691 A , US 6,006,167 A and US 2009/0104573 A1 show processes using pressure switches.
  • a novel method for pressure monitoring a pressure-dependent process and a novel pressure sensor are provided allowing a pressure monitoring with reduced hardware and installation costs.
  • the invention provides a method for pressure monitoring a pressure-dependent process according to claim 1.
  • the novel method for pressure monitoring a pressure-dependent process comprises the following steps: Measuring over time a pressure of the pressure-dependent process.
  • Processing the measured pressure by determining if the measured pressure or a filtered pressure obtained from the measured pressure is inside or outside defined pressure ranges, each pressure range being defined by a respective lower limit and by a respective upper limit.
  • the pressure monitoring signal has a first value or first status if the measured pressure or the filtered pressure is inside a respective pressure range.
  • the pressure monitoring signal has a second value or second status if the measured pressure or the filtered pressure is outside a respective pressure range violating a safety relevant limit.
  • the pressure monitoring signal has a third value or third status if the measured pressure or the filtered pressure is outside a respective pressure range violating a non-safety relevant limit.
  • the novel method allows a pressure monitoring with reduced hardware and installation costs.
  • the pressure monitoring signal has the first value or first status if the measured or filtered pressure is within a respective time interval inside the respective pressure range.
  • the pressure monitoring signal has the second value or second status if the measured pressure or the filtered pressure is within a respective time interval outside the respective pressure range violating a safety relevant limit.
  • the pressure monitoring signal has the third value or third status if the measured pressure or the filtered pressure is within a respective time interval outside a respective pressure range violating a non-safety relevant limit. This is preferred if a feedback signal of the pressure-dependent process being indicative about operational time intervals of the pressure-dependent process is available when measuring the pressure.
  • the pressure dependent process is continued unchanged.
  • the pressure monitoring signal has the second value or second status the pressure dependent process is stopped.
  • the pressure monitoring signal has the third value or third status
  • the pressure dependent process is continued unchanged or the pressure dependent process is continued by adapting at least one process parameter of the pressure dependent process or the pressure dependent process is stopped.
  • the action to be taken if the if the pressure monitoring signal has the third value or third status may depend on the respective pressure range and/or the respective non-safety relevant limit. This allows a very preferred operation of the pressure-dependent process on basis of the pressure monitoring.
  • the pressure sensor for monitoring a pressure dependent process is defined in claim 10 and comprises: A measuring unit being configured to measure over the time a pressure of the pressure-dependent process.
  • a processing unit being configured to process the measured pressure by determining if the measured pressure or a filtered pressure obtained from the measured pressure is inside or outside defined pressure ranges and to generate a pressure monitoring signal in such a way that the pressure monitoring signal has a first value or first status if the measured pressure or the filtered pressure is inside a respective pressure range, that the pressure monitoring signal has a second value or second status if the measured pressure or the filtered pressure is outside a respective pressure range violating a safety relevant limit, and that the pressure monitoring signal has a third value or third status if the measured pressure or the filtered pressure is outside a respective pressure range violating a non-safety relevant limit.
  • the pressure sensor allows to monitor several pressure levels and eliminates the need of individual pressure switches to monitor the several pressure levels.
  • the invention relates to a method for pressure monitoring a pressure-dependent process and further to a pressure senor for pressure monitoring a pressure-dependent process.
  • the pressure-dependent process may be a combustion process of a gas burner appliance combusting a gas/air mixture which is provided by mixing gas with air.
  • the pressure to be monitored may be the pressure of the gas or the pressure of the air or the pressure of the gas/air mixture.
  • the gas to be combusted may be natural gas, coal gas, methane, propane, hydrogen or the like. As absolute pressure may be measured as pressure of the pressure-dependent process.
  • the invention can be used in connection with other pressure-dependent processes to monitor the pressure of process medium like a gaseous process medium, a liquid process medium, a solid process medium or a plasma process medium.
  • the pressure monitoring method comprises the following steps: A measuring step to measure over time a pressure of the pressure-dependent process.
  • a processing step to process the measured pressure by determining if the measured pressure or a filtered pressure obtained from the measured pressure is inside or outside defined pressure ranges, each pressure range being defined by a respective lower limit and by a respective upper limit.
  • a generating step to generate a pressure monitoring signal in such a way that i) the pressure monitoring signal has a first value or first status if the measured pressure or the filtered pressure is inside a respective pressure range, that ii) the pressure monitoring signal has a second value or second status if the measured pressure or the filtered pressure is outside a respective pressure range violating a safety relevant limit, and that iii) the pressure monitoring signal has a third value or third status if the measured pressure or the filtered pressure is outside a respective pressure range violating a non-safety relevant limit.
  • curve 10 of Figure 1 shows a pressure signal of a pressure-dependent process measured over time t.
  • curve 10 of Figure 1 may show a filtered pressure signal obtained from the measured pressure signal.
  • Figure 1 further shows pressure ranges 11, 12, 13, and 14.
  • the pressure range 11 is defined by a respective lower limit A and by a respective upper limit B.
  • the pressure range 12 is defined by a respective lower limit C and by a respective upper limit D.
  • the pressure range 13 is defined by a respective lower limit E and by a respective upper limit F.
  • the pressure range 14 is defined by a respective lower limit G and by a respective upper limit H.
  • the pressure monitoring signal has the first value or first status. If the pressure monitoring signal has the first value or first status, the pressure dependent process is continued unchanged.
  • the pressure monitoring signal has the second value or second status. If the pressure monitoring signal has the second value or second status, the pressure dependent process is stopped immediately.
  • a safety relevant limit is the lower limit A of the pressure range 11. If it would be determined that the pressure signal 10 would be below the safety relevant limit A, the pressure monitoring signal would have the second value or second status and the the pressure dependent process would be stopped immediately.
  • the area 15 in Fig. 1 illustrates a safety relevant area. If the pressure signal 10, namely either the measured pressure signal or the filtered pressure signal obtained from the measured pressure signal, would be within this safety relevant area 15, the pressure monitoring signal would have the second value or second status and the pressure dependent process would be stopped.
  • the pressure monitoring signal has the third value or third status. If the pressure monitoring signal has the third value or third status, the pressure dependent process is continued unchanged or by adapting at least one process parameter or the pressure dependent process is stopped. In Figure 1 such a non-safety relevant limit would be the limits B to H. If it would be determined that the pressure signal 10 would above the limit B and below the limit C, and/or above the limit D and below the limit E, and/or above the limit F and below the limit G, the pressure monitoring signal would have the third value or third status. The pressure dependent process may then be continued unchanged or may then be continued by adapting at least one process parameter or the pressure dependent process is stopped, depending on the respective limit and/or depending on the duration of the violation of the respective limit.
  • the pressure dependent process may be continued unchanged in view of the brief violation of the limit C in section 16 of the pressure signal 10 and/or the pressure dependent process may be continued by adapting at least one process parameter in view of the long violation of the limits F and G in section 17 of the pressure signal 10.
  • the method illustrated in Figure 1 is preferably used if a feedback signal of the pressure-dependent process being indicative about operational time intervals of the pressure-dependent process is not available when measuring the pressure.
  • the curve 20 of Figure 12 shows a pressure signal of a pressure-dependent process measured over time t.
  • curve 20 of Figure 2 may show a filtered pressure signal obtained from the measured pressure signal.
  • Figure 2 further shows pressure ranges 21, 22, 23, and 24.
  • the pressure range 21 is defined by a respective lower limit A and by a respective upper limit B and is valid for time interval between times t1 and t2.
  • the pressure range 22 is defined by a respective lower limit C and by a respective upper limit D and is valid for time interval between times t3 and t4.
  • the pressure range 23 is defined by a respective lower limit E and by a respective upper limit F and is valid for time interval between times t5 and t6.
  • the pressure range 24 is defined by a respective lower limit G and by a respective upper limit H and is valid for time interval between times t7 and t8.
  • the pressure monitoring signal has the first value or first status. If the pressure monitoring signal has the first value or first status, the pressure dependent process is continued unchanged.
  • the pressure monitoring signal has the second value or second status and the pressure dependent process is stopped immediately.
  • a safety relevant limit would be the lower limit A of the pressure range 21. If it would be determined that the pressure signal 20 would within the time interval t1-t2 or within any other time interval below the safety relevant limit A, the pressure monitoring signal would have the second value or second status and the pressure dependent process would be stopped.
  • the area 25 in Fig. 2 illustrates a safety relevant area. If the pressure signal 20 would be at any time within this safety relevant area 25, the pressure monitoring signal would have the second value or second status and the pressure dependent process would be stopped immediately.
  • the pressure monitoring signal has the third value or third status. If the pressure monitoring signal has the third value or third status, the pressure dependent process may be continued unchanged or may be stopped or may be continued by adapting at least one process parameters of the pressure dependent process.
  • such a non-safety relevant limit would be the limits B to H. If it would be determined that the pressure signal 20 would be in time interval t1-t2 above limits B, and/or in time interval t3-t4 the pressure signal 20 would be below limit C or above limit D, and/or in time interval t5-t6 the pressure signal 10 would be below limit D or above limit E, and/or in time interval t7-t8 the pressure signal 10 would be below limit G or above limit H, the pressure monitoring signal would have the third value or third status.
  • the pressure dependent process may then be continued unchanged or may then be continued by adapting at least one process parameter or the pressure dependent process is stopped, depending on the respective limit and/or depending on the duration of the violation of the respective limit.
  • the pressure dependent process may be continued unchanged in view of the brief violation of the limit C in time interval t3-t4 and/or the pressure dependent process may be continued by adapting at least one process parameter in view of the long violation of the limit E in time-interval t5-t6.
  • the pressure of the pressure-dependent process is measuring over the time t.
  • the pressure signal 10, 20 is a function of time. This means that the value or status of pressure monitoring signal obtained on basis of the pressure signal 10, 20 may change over the time t because the processing step and generating step are executed over the time on basis of the pressure signal 10, 20.
  • the present disclosure provides further a pressure sensor 30 for monitoring a pressure-dependent process.
  • the pressure sensor 30 comprises a measuring unit 31 being configured to measure over the time a pressure of the pressure-dependent process.
  • the pressure sensor 30 may comprise one measuring unit 31 or several measuring units 31. If the pressure sensor 30 comprises several measuring units 31, e. g. two measuring units 31, each measuring unit 31 may measure the pressure to provide redundancy.
  • the measurement values of the measuring units 31 may be used to calculate an average value. The average value may that be used in the processing step.
  • the pressure sensor 30 further comprises a memory unit 32 for storing at least the defined pressure ranges, each pressure range being defined by a respective lower limit and by a respective upper limit.
  • the pressure sensor 30 further comprises a processing unit 33 being configured to process the measured pressure by determining if the measured pressure or a filtered pressure obtained from the measured pressure is inside or outside a respective pressure range and to generate a pressure monitoring signal 34.
  • the pressure monitoring signal 34 has a first value or first status if the measured pressure or the filtered pressure is inside a respective pressure range.
  • the pressure monitoring signal has a second value or second status if the measured pressure or the filtered pressure is outside a respective pressure range violating a safety relevant limit.
  • the pressure monitoring signal has a third value or third status if the measured pressure or the filtered pressure is outside a respective pressure range violating a non-safety relevant limit.
  • the pressure monitoring signal 34 is used by a control system 35 to control the pressure-dependent process. If the pressure monitoring signal 34 has the first value or first status, the pressure dependent process is continued unchanged. Preferably, if the pressure monitoring signal 34 has the second value or second status the pressure dependent process is stopped immediately. Preferably, if the pressure monitoring signal 34 has the third value or third status, the pressure dependent process is continued unchanged or the pressure dependent process 35 is continued by adapting at least one process parameter of the pressure dependent process or the pressure dependent process 35 is stopped.
  • the method illustrated in Figure 2 is preferably used. If the feedback signal 36 is not available, the method illustrated in Figure 1 is preferably used.
  • the basic concept of the invention is to provide a pressure monitoring which allows to replace several pressure switches with one pressure sensor.
  • the pressure sensor provides as output the pressure monitoring signal 34 indicating a valid or invalid pressure state.
  • Pressure monitoring can be provided at reduced hardware and installation costs.
  • State conditions for the pressure sensor output, namely for the pressure monitoring signal 34, are defined by parameters to be stored in memory unit 35.
  • At least defined pressure ranges and preferably also time intervals associated with the pressure ranges are stored in memory unit 35.
  • With one intelligent pressure sensor 30 the function of many pressure switches can be covered. With one intelligent pressure sensor 30 a pressure can be measured and it can be verified that the measured pressure is in expected pressure ranges in expected time intervals. By the changing the of parameters stored in the non-volatile memory unit, the sensor 30 can be easily configured to different applications.
EP21203458.1A 2021-10-19 2021-10-19 Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression Pending EP4170236A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21203458.1A EP4170236A1 (fr) 2021-10-19 2021-10-19 Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression
PCT/EP2022/078195 WO2023066712A1 (fr) 2021-10-19 2022-10-11 Procédé de surveillance de pression de processus dépendant de la pression, et capteur de pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21203458.1A EP4170236A1 (fr) 2021-10-19 2021-10-19 Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression

Publications (1)

Publication Number Publication Date
EP4170236A1 true EP4170236A1 (fr) 2023-04-26

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EP21203458.1A Pending EP4170236A1 (fr) 2021-10-19 2021-10-19 Procédé de surveillance de la pression d'un processus dépendant de la pression et capteur de pression

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EP (1) EP4170236A1 (fr)
WO (1) WO2023066712A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06229804A (ja) * 1993-02-03 1994-08-19 Matsushita Electric Ind Co Ltd ガス供給設備異常監視装置
JPH06229803A (ja) * 1993-02-03 1994-08-19 Matsushita Electric Ind Co Ltd ガス供給設備異常監視装置
US5732691A (en) 1996-10-30 1998-03-31 Rheem Manufacturing Company Modulating furnace with two-speed draft inducer
US6006167A (en) 1996-04-25 1999-12-21 Bunting; John E. Gas burner monitor and diagnostic apparatus
EP1000301B1 (fr) 1997-08-01 2001-11-21 Webb, Mark St. John Systemes de bruleur
US20090104573A1 (en) 2007-10-23 2009-04-23 Wen Chou Chen Gas burner system
EP3118030A1 (fr) * 2015-07-16 2017-01-18 Airbus Operations Limited Dispositif de capteur de pression de pneumatique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655041A (en) * 1986-01-21 1987-04-07 Dresser Industries, Inc. Rate of change of pressure temperature protection system for a turbine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06229804A (ja) * 1993-02-03 1994-08-19 Matsushita Electric Ind Co Ltd ガス供給設備異常監視装置
JPH06229803A (ja) * 1993-02-03 1994-08-19 Matsushita Electric Ind Co Ltd ガス供給設備異常監視装置
US6006167A (en) 1996-04-25 1999-12-21 Bunting; John E. Gas burner monitor and diagnostic apparatus
US5732691A (en) 1996-10-30 1998-03-31 Rheem Manufacturing Company Modulating furnace with two-speed draft inducer
EP1000301B1 (fr) 1997-08-01 2001-11-21 Webb, Mark St. John Systemes de bruleur
US20090104573A1 (en) 2007-10-23 2009-04-23 Wen Chou Chen Gas burner system
EP3118030A1 (fr) * 2015-07-16 2017-01-18 Airbus Operations Limited Dispositif de capteur de pression de pneumatique

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