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公开(公告)号：EP0649529A4
公开(公告)日：1995-08-30
申请号：EP93916944
申请日：1993-07-02
申请人： KAY RAY SENSALL INC
IPC分类号： G01F23/296 , G01F25/00 , G01N29/024 , G01N29/22 , G01N29/02 , G01F23/00
CPC分类号： G01N29/22 , G01F23/296 , G01F23/2965 , G01F25/0061 , G01F25/0076 , G01N29/024 , G01N2291/02818 , G01N2291/02836 , G01N2291/044
摘要： A controller (16) adapted for coupling a plurality of ultrasonic transducers (12, 14) includes a multiplexer (62) for selecting a transducer (12, 14), signal processing means (50) for processing an output of the selected transducer (12, 14), and controller means (64) for providing operational parameters corresponding to the selected transducer (12, 14). The controller (16) couples to a two wire 4-20 mA communication loop (18) to periodically excite the selected transducer (12, 14). The controller (16) stores power received from the communication loop (18) and excites the transducer (12, 14) by using the stored power to exceed the power available directly from the communication loop (18). The controller (16) provides a wet self-test of the transducer (12, 14) whereby the output level of the transducer (12, 14) is monitored while the strength of the excitation signal provided to the transducer (12, 14) is decreased. The amount of decrease required for the output signal to pass a threshold level is an indication of the usefulness of the sensor (18A, 18B-18N).
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公开(公告)号：EP0716732A1
公开(公告)日：1996-06-19
申请号：EP94924003.0
申请日：1994-07-25
发明人： JONES, Lawrence , ROSSELSON, Boris , ESIN, Alex
CPC分类号： G01F25/0061 , G01F23/2961
摘要： An ultrasonic liquid level sensor (40) inlcudes an ultrasonic coupling element (42) for use in self testing. The sensor (40) includes a gap (20) and a pair of transducers (14, 16) spaced apart by the gap (26). The sensor (40) senses presence of liquid in the gap (20). The ultrasonic coupling element (42) extends between the transducers (14, 16) and acoustically couples them together. The coupling element (42) is used to test ultrasonic sensor integrity.
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公开(公告)号：EP0616686A1
公开(公告)日：1994-09-28
申请号：EP93900947.0
申请日：1992-12-08
发明人： DIMARTINO, John, M.
CPC分类号： G01N23/204 , G01F23/288 , G01F23/2885 , G01T3/00
摘要： Un système de mesure (14) utilise la rétrodiffusion à neutrons rapides pour mesurer la densité, le niveau et les points de contact des matériaux sensiblement non hydrogénés (18), c'est-à-dire des matériaux autres que ceux contenant de l'hydrogène. On mesure lesdits matériaux (18) dans des cuves (12) à parois épaisses. Le système contient une source de neutrons rapides (16) servant à émettre des neutrons dans le matériau (18) à mesurer. Un système de détection (26) est monté à proximité de la source de neutrons (16), afin de recevoir les neutrons rétrodiffusés. Un système de dégradation d'énergie (22) fait descendre le niveau d'énergie de neutrons rapides jusqu'à une plage de détection souhaitée.
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公开(公告)号：EP0596966A4
公开(公告)日：1994-09-21
申请号：EP92916332
申请日：1992-07-16
申请人： KAY RAY SENSALL INC
IPC分类号： G01F23/28 , G01F23/296 , G01F25/00 , G01N29/00 , G01N29/024 , G01V1/00
CPC分类号： G01F25/0092 , G01F23/2961 , G01F23/2962 , G01N29/024 , G01N2291/02818 , G01N2291/02836 , G01V1/001
摘要： A time gate ultrasonic sensor (10) measures a physical property of a material, such as the presence of the material, within a defined space (20). The sensor (10) includes at least one transducer (14, 16) connected to a support structure (12) and positioned generally adjacent the defined space (20) for transmitting and receiving ultrasonic signals (22) across the defined space (20). The ultrasonic signals (22) include a main waveform (48, 62) which travels across the defined space (20) and a self-test waveform (50, 60) which travels along the support structure (18, 43). The sensor (10) monitors the received ultrasonic signals (22) during a main time window (120) to sense whether the main waveform (48, 62) is present in the received signals (22). The sensor (10) senses the physical property of the material within the defined space (20) as a function of whether the main waveform (48, 62) is present within the time window (120).
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5.发明授权Ultrasonic transducer for testing its integrity and/or measuring property of a material 失效用于测试其能力超声换能器的功能和/或用于测量材料的特性
公开(公告)号：EP0649529B1
公开(公告)日：2001-06-13
申请号：EP93916944.7
申请日：1993-07-02
CPC分类号： G01N29/22 , G01F23/296 , G01F23/2965 , G01F25/0061 , G01F25/0076 , G01N29/024 , G01N2291/02818 , G01N2291/02836 , G01N2291/044
摘要： A controller (16) adapted for coupling a plurality of ultrasonic transducers (12, 14) includes a multiplexer (62) for selecting a transducer (12, 14), signal processing means (50) for processing an output of the selected transducer (12, 14), and controller means (64) for providing operational parameters corresponding to the selected transducer (12, 14). The controller (16) couples to a two wire 4-20 mA communication loop (18) to periodically excite the selected transducer (12, 14). The controller (16) stores power received from the communication loop (18) and excites the transducer (12, 14) by using the stored power to exceed the power available directly from the communication loop (18). The controller (16) provides a wet self-test of the transducer (12, 14) whereby the output level of the transducer (12, 14) is monitored while the strength of the excitation signal provided to the transducer (12, 14) is decreased. The amount of decrease required for the output signal to pass a threshold level is an indication of the usefulness of the sensor (18A, 18B-18N).
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公开(公告)号：EP1017970A1
公开(公告)日：2000-07-12
申请号：EP98941057.6
申请日：1998-08-26
CPC分类号： G01F23/268 , G01F23/265 , G01F23/266 , Y10T307/779 , Y10T307/826
摘要： A capacitive level sensor (10) for sensing level of a liquid (102) in a vessel (100) includes a sensor (14) coupled to the vessel (100) having a shield (32) and an inner sensing rod (34). An oscillator (44) provides an RF signal to the shield (32) and the sensing rod (34). Comparison circuitry (48) coupled to the sensing rod (34) provides a wet/dry output in response to capacitance between the inner sensing rod (14) and the vessel (100), the capacitance is related to the level of the liquid (102) in the vessel (100).
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公开(公告)号：EP0649529A1
公开(公告)日：1995-04-26
申请号：EP93916944.0
申请日：1993-07-02
CPC分类号： G01N29/22 , G01F23/296 , G01F23/2965 , G01F25/0061 , G01F25/0076 , G01N29/024 , G01N2291/02818 , G01N2291/02836 , G01N2291/044
摘要： A controller (16) adapted for coupling a plurality of ultrasonic transducers (12, 14) includes a multiplexer (62) for selecting a transducer (12, 14), signal processing means (50) for processing an output of the selected transducer (12, 14), and controller means (64) for providing operational parameters corresponding to the selected transducer (12, 14). The controller (16) couples to a two wire 4-20 mA communication loop (18) to periodically excite the selected transducer (12, 14). The controller (16) stores power received from the communication loop (18) and excites the transducer (12, 14) by using the stored power to exceed the power available directly from the communication loop (18). The controller (16) provides a wet self-test of the transducer (12, 14) whereby the output level of the transducer (12, 14) is monitored while the strength of the excitation signal provided to the transducer (12, 14) is decreased. The amount of decrease required for the output signal to pass a threshold level is an indication of the usefulness of the sensor (18A, 18B-18N).
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公开(公告)号：EP1017970A4
公开(公告)日：2000-07-12
申请号：EP98941057
申请日：1998-08-26
申请人： KAY RAY SENSALL INC
发明人： BRENNER RAUL , ESIN ALEX J , JONES LAWRENCE J , ROSSELSON BORIS
CPC分类号： G01F23/268 , G01F23/265 , G01F23/266 , Y10T307/779 , Y10T307/826
摘要： A capacitive level sensor (10) for sensing level of a liquid (102) in a vessel (100) includes a sensor (14) coupled to the vessel (100) having a shield (32) and an inner sensing rod (34). An oscillator (44) provides an RF signal to the shield (32) and the sensing rod (34). Comparison circuitry (48) coupled to the sensing rod (34) provides a wet/dry output in response to capacitance between the inner sensing rod (14) and the vessel (100), the capacitance is related to the level of the liquid (102) in the vessel (100).
摘要翻译： 一种用于感测容器（100）中的液体（102）的液位的电容式液位传感器（10）包括耦合到具有护罩（32）和内部感测杆（34）的容器（100）的传感器（14）。 振荡器（44）向屏蔽（32）和感测棒（34）提供RF信号。 耦合到感测棒（34）的比较电路（48）响应于内部感测棒（14）和容器（100）之间的电容提供湿/干输出，电容与液体（102 ）在容器（100）中。
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公开(公告)号：EP0616686A4
公开(公告)日：1994-10-12
申请号：EP93900947
申请日：1992-12-08
申请人： KAY RAY SENSALL INC
发明人： DIMARTINO JOHN M
IPC分类号： G01F23/288 , G01N23/204 , G01T3/00 , G01F23/00 , G01N23/09
CPC分类号： G01N23/204 , G01F23/288 , G01F23/2885 , G01T3/00
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公开(公告)号：EP0596966A1
公开(公告)日：1994-05-18
申请号：EP92916332.0
申请日：1992-07-16
CPC分类号： G01F25/0092 , G01F23/2961 , G01F23/2962 , G01N29/024 , G01N2291/02818 , G01N2291/02836 , G01V1/001
摘要： Détecteur ultrasonique à sélection temporelle (10) qui mesure une propriété physique d'un matériau, telle que la présence dudit matériau, au sein d'un espace défini (20). Ledit détecteur (10) comporte au moins un transducteur (14, 16) relié à une structure de support (12) et placé généralement dans une position adjacente à l'espace défini (20), en vue de transmettre et de recevoir des signaux ultrasoniques (22) à travers l'espace défini (20). Lesdits signaux ultrasoniques (22) comportent une forme d'onde principale (48, 62) qui parcourt l'espace défini (20) et une forme d'onde d'auto-vérification (50, 60) qui se déplace le long de la structure de support (18, 43). Le capteur (10) contrôle les signaux ultrasoniques reçus (22) pendant une fenêtre temporelle principale (120) pour détecter si la forme d'onde principale (48, 62) est présente dans les signaux reçus (22). Ledit capteur (10) détecte la propriété physique du matériau au sein de l'espace défini (20) en tant que fonction de la présence de la forme d'onde principale (48, 62) dans la fenêtre temporelle (120).
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