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11. 发明专利

HU0100673A2 ARRANGEMENT FOR FILLING LEVEL MEASUREMENT 未知
公开(公告)号：HU0100673A2
公开(公告)日：2002-01-28
申请号：HU0100673
申请日：2001-02-09
申请人： ENDRESS HAUSER GMBH CO
发明人： VAN BILJON CLIVE , GERST PETER , HARDELL ALEXANDER , MCINTYRE CRAIG
IPC分类号： G01F23/284 , G01S13/00

12. 发明专利

DE59700227D1 未知
公开(公告)号：DE59700227D1
公开(公告)日：1999-07-29
申请号：DE59700227
申请日：1997-07-17
申请人： ENDRESS HAUSER GMBH CO
发明人： GERST PETER , BANHOLZER KARLHEINZ , FLOEGEL KARL , JUNG PETER
IPC分类号： G01L13/06 , G01L9/12 , G01L19/00 , G01L19/04
摘要： The sensor (1) consists of a liquid filled measurement cell with membranes (3a, 3b) each subject to a static pressure (Ps) plus an additional pressure (P1, P2). The capacitances of measurement capacitors (C1, C2) change with changes in pressure. A temperature measurement circuit (7) converts the output of a temperature sensor (6) to a signal corresponding to the differential pressure sensor temperature. A measurement circuit (8) retunes the inverse values (1/C1, 1/C2) and a computer (9) determines the sum ( ) of the inverse capacitances and from their difference ( DELTA ) a differential pressure value ( DELTA Pm) providing an output signal which corresponds to the difference (P1-P2). The sum of the inverse capacitances (1/C1, 1/C2) relates to an internal temperature (Ti) which is equal to a temperature off-set (T0) when neither membrane is subjected to a static pressure, and no differences exists between the first and second pressures and a first correction value ( DELTA K) is determined from the relationship: DELTA K = Ti-Ts-T0 where the correction value at a temperature (Tr) is a measure of the static pressure (Ps). The differential pressure is then determined from the differential pressure value ( DELTA Pm) by applying the correction value ( DELTA K) to allow for the static pressure.

13. 发明专利

DE59504814D1 未知
公开(公告)号：DE59504814D1
公开(公告)日：1999-02-25
申请号：DE59504814
申请日：1995-03-31
申请人： ENDRESS HAUSER GMBH CO
发明人： GERST PETER , BANHOLZER KARLHEINZ , MAIER WINFRIED
IPC分类号： G01L9/12 , G01L9/00 , G01L19/14

14. 发明专利

CA2149896C A RADAR-BASED METHOD OF LEVEL MEASUREMENT 未知
公开(公告)号：CA2149896C
公开(公告)日：1998-10-06
申请号：CA2149896
申请日：1994-09-20
申请人： ENDRESS HAUSER GMBH CO
发明人： OTTO JOHANNGEORG , BURGER STEFAN , GERST PETER
IPC分类号： G01F23/284 , G01S7/40 , G01S13/08 , G01S13/88
摘要： In a method of level measurement on a radar basis, microwaves are emitted by means of an antenna to the surface of a material in a container and the echo waves reflected from the surface thereof are received. An actual echo function representing the echo amplitudes as a function of the distance is formed from the echo waves received by the antenna for each measurement, the probable useful echo and the transit time thereof are established from the actual echo function, and the distance of the material surface from the antenna is determined therefrom. To recognize the formation of a deposit and/or other trouble, such as e.g. damage to or loss of the antenna, an undisturbed echo function corresponding to an undisturbed measurement is obtained and stored prior to performing the measurements. In each measurement the actual echo function is compared to the stored undisturbed echo function. When due to the comparison, deviations between the two functions are found in the antenna region and the proximity zone, these deviations are evaluated to recognize the formation of a material deposit and/or other trouble.

15. 发明专利

DE59306341D1 未知
公开(公告)号：DE59306341D1
公开(公告)日：1997-06-05
申请号：DE59306341
申请日：1993-12-08
申请人： ENDRESS HAUSER GMBH CO
发明人： OTTO JOHANNGEORG , BURGER STEFAN , GERST PETER
IPC分类号： G01F23/28 , G01F23/284 , G01F25/00 , G01S13/88
摘要： A level measuring device using microwaves comprises an antenna for sending transmitted waves toward the surface of a material whose level is to be measured, and for the reception of echo waves resulting from reflection at the surface, and a receiving and evaluating circuit which derives from the echo waves received by the antenna an echo function representative of the echo amplitudes as a function of the distance and determines from the echo function the transit time of the microwaves from the antenna to the surface of the material and therefrom the distance of the surface of the material from the antenna. In order to detect the formation of deposits of the material on the antenna or further trouble conditions, such as damage to the antenna or the loss thereof, the level measuring device comprises an arrangement which compares a section of the echo function originating from a reference reflection point in the antenna or in the vicinity of the antenna with a predetermined threshold value and produces a signal indicating the existence of a state above or below the said threshold value. The reference reflection point may be constituted by a part of the antenna or a separate reference reflector mounted in the antenna or in the vicinity thereof.

16. 发明专利

DE4241910A1 未知
公开(公告)号：DE4241910A1
公开(公告)日：1994-06-16
申请号：DE4241910
申请日：1992-12-11
申请人： ENDRESS HAUSER GMBH CO
发明人： JOHANNGEORG OTTO DR , GERST PETER , BURGER STEFAN
IPC分类号： G01F23/28 , G01F23/284 , G01F25/00 , G01S13/88 , G01S7/40 , G01S7/03
摘要： A level measuring device using microwaves comprises an antenna for sending transmitted waves toward the surface of a material whose level is to be measured, and for the reception of echo waves resulting from reflection at the surface, and a receiving and evaluating circuit which derives from the echo waves received by the antenna an echo function representative of the echo amplitudes as a function of the distance and determines from the echo function the transit time of the microwaves from the antenna to the surface of the material and therefrom the distance of the surface of the material from the antenna. In order to detect the formation of deposits of the material on the antenna or further trouble conditions, such as damage to the antenna or the loss thereof, the level measuring device comprises an arrangement which compares a section of the echo function originating from a reference reflection point in the antenna or in the vicinity of the antenna with a predetermined threshold value and produces a signal indicating the existence of a state above or below the said threshold value. The reference reflection point may be constituted by a part of the antenna or a separate reference reflector mounted in the antenna or in the vicinity thereof.

17. 发明专利

CA2325903C PRESSURE SENSOR 未知
公开(公告)号：CA2325903C
公开(公告)日：2004-08-31
申请号：CA2325903
申请日：2000-11-15
申请人： ENDRESS HAUSER GMBH CO
发明人： FLOGEL KARL , UEHLIN THOMAS , SCHMIDT ELKE , HEGNER FRANK , BANHOLZER KARLHEINZ , MARTIN RAINER , DREWES ULFERT , GERST PETER
IPC分类号： G01L9/12 , G01L9/00 , G01L19/14
摘要： A pressure sensor that is particularly suitable inter alia for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal (3, 45) with a separating diaphragm (7, 53) on which a pressure (P) to be measured acts and having a ceramic measuring cell (9, 57) which is connected to the diaphragm seal (3, 45) exclusively by inorganic materials, is provided, in which sensor the separating diaphragm (7, 53) and all further sensor components coming into contact during measurement with a medium of which the pressure (P) is to be measured are metallic.

18. 发明专利

CA2240923C RADAR-BASED METHOD OF MEASURING THE LEVEL OF A MATERIAL IN A CONTAINER 未知
公开(公告)号：CA2240923C
公开(公告)日：2001-02-13
申请号：CA2240923
申请日：1998-06-04
申请人： ENDRESS HAUSER GMBH CO
发明人： LUBCKE WOLFGANG , LAU JUERGEN , GERST PETER , FITSCH CARSTEN
IPC分类号： G01F23/284 , G01S13/08
摘要： For measuring the level of a material in a container on the basis of the radar principle, microwaves are radiated downwards and reflected microwaves received by means of the antenna of a ranging device arranged above the highest level anticipated. In the normal measuring operation the received microwaves are evaluated in the distance range up to empty distance corresponding to the distance of the antenna from the bottom of the container for determining the echo waves reflected from the surface of the material, for measuring the transit time of the echo waves and for computing the distance of the material surface from the antenna of the ranging device from the measured transit time. In order to reliably detect the empty condition of a container having a curved bottom, despite the multiple reflections of the microwaves reflected from the container bottom, when no echo waves are detected in the distance range up to the empty distance, the evaluation is done in an enlarged distance range and any echo waves detected in the enlarged distance range beyond the empty distance are assigned to the empty distance.

19. 发明专利

FI100361B Paine-eromittari 未知
公开(公告)号：FI100361B
公开(公告)日：1997-11-14
申请号：FI904734
申请日：1990-09-26
申请人： ENDRESS HAUSER GMBH CO
发明人： BANHOLZER KARLHEINZ , GERST PETER , JUNG PETER
IPC分类号： G01L13/06 , G01L9/00 , G01L9/12 , G01L19/00 , G11B19/20 , G11B23/50 , G01L19/04

20. 发明专利

DE4241910C2 未知
公开(公告)号：DE4241910C2
公开(公告)日：1996-08-01
申请号：DE4241910
申请日：1992-12-11
申请人： ENDRESS HAUSER GMBH CO
发明人： JOHANNGEORG OTTO DR , GERST PETER , BURGER STEFAN
IPC分类号： G01F23/28 , G01F23/284 , G01F25/00 , G01S13/88 , G01S7/40 , G01S7/03
摘要： A level measuring device using microwaves comprises an antenna for sending transmitted waves toward the surface of a material whose level is to be measured, and for the reception of echo waves resulting from reflection at the surface, and a receiving and evaluating circuit which derives from the echo waves received by the antenna an echo function representative of the echo amplitudes as a function of the distance and determines from the echo function the transit time of the microwaves from the antenna to the surface of the material and therefrom the distance of the surface of the material from the antenna. In order to detect the formation of deposits of the material on the antenna or further trouble conditions, such as damage to the antenna or the loss thereof, the level measuring device comprises an arrangement which compares a section of the echo function originating from a reference reflection point in the antenna or in the vicinity of the antenna with a predetermined threshold value and produces a signal indicating the existence of a state above or below the said threshold value. The reference reflection point may be constituted by a part of the antenna or a separate reference reflector mounted in the antenna or in the vicinity thereof.

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