Device for the measurement and monitoring of a process parameter
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01F-023/00
G01S-013/32
출원번호
US-0466763
(2001-12-13)
우선권정보
DE-0005473 (2001-02-05)
국제출원번호
PCT//EP01/14671
(2003-11-18)
§371/§102 date
20031118
(20031118)
국제공개번호
WO02//06325
(2002-08-15)
발명자
/ 주소
Michalski, Bernhard
Str?tt, Bernd
Heidepriem, Sebastian
출원인 / 주소
Endress + Hauser GmbH + Co. KG
대리인 / 주소
Bacon &
인용정보
피인용 횟수 :
5인용 특허 :
5
초록▼
The invention concerns a device for measuring and/or monitoring a process parameter, with a sensor, an intermittently working measurement circuit, which has at least one energy storer unit, wherein the measurement circuit or individual components of the measurement circuit are activated for a predet
The invention concerns a device for measuring and/or monitoring a process parameter, with a sensor, an intermittently working measurement circuit, which has at least one energy storer unit, wherein the measurement circuit or individual components of the measurement circuit are activated for a predetermined time span, the so-called active phase, and with a control center, wherein the measurement circuit and the control center are connected with one another over a two-wire line and wherein a control-/evaluation-unit is provided, which activates the measurement circuit at the earliest, when the energy in the energy storer unit has reached a predetermined level.
대표청구항▼
1. A device for measuring and/or monitoring a process parameter, comprising: a sensor;a control center; and a two-wire line which connects said sensor and said control center, wherein: said sensor has an intermittently working measurement circuit, which has at least one energy storer unit, and a con
1. A device for measuring and/or monitoring a process parameter, comprising: a sensor;a control center; and a two-wire line which connects said sensor and said control center, wherein: said sensor has an intermittently working measurement circuit, which has at least one energy storer unit, and a control/evaluation unit; said measurement circuit is activated for an active phase which accounts for a predetermined time span; and said control/evaluation unit activates said measurement circuit, at the earliest, when the energy in said storer unit has reached a predetermined level and, in addition, controls the clock rate of said measurement circuit, thus it is assured that the power demand of the device is completely covered over said two-wire line, during the active phase, while the number of active phases per time unit and the firing rate, respectively, are nevertheless as high as possible. 2. The device as defined in claim 1, wherein:the process parameter relates to the fill level of a fill material in a container. 3. The device as defined in claim 1, wherein:said sensor comprises a fill level sensor which issues measurement signals in the direction of the surface of a fill material in a container, and which receives echo signals reflected from the surface of the fill material. 4. The device as defined in claim 1, wherein: said energy storer unit is a capacitor.5. The device as defined in claim 4, further comprising:a storer limiting unit, wherein: said storer limiting unit is connected in parallel with said capacitor. 6. The device as defined in claim 1, wherein: said control/evaluation unit initiates said active phase, as soon as a predetermined current voltage and/or voltage value is reached in said measurement circuit, or a component of said measurement circuit.7. The device as defined in claim 1, wherein: said control/evaluation unit initiates said active phase, when the predetermined current value and/or voltage value is/are constant during a predetermined time interval.8. The device as defined in claim 1, wherein: said control/evaluation unit inserts an additional minimum wait time before it initiates said active phase.9. The device as defined in claim 1, wherein: the energy supply of said device and the data exchange between said measurement circuit and said control center occur over said two-wire line.
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이 특허에 인용된 특허 (5)
Zyl Ian D. (Peterborough CAX), Loop powered process control transmitter.
Schroeder Alfred A. (San Antonio TX) Credle Bennet G. (San Antonio TX) Laughlin Richard L. (San Antonio TX) Chadwell Thomas J. (San Antonio TX), Method and apparatus for sensing and controlling the level of ice in an ice dispenser.
Chen, Qi; Bergmann, Eric; Feisst, Klaus, Fill-level measuring device for ascertaining and monitoring fill level of a medium located in the process space of a container by means of a microwave travel time measuring method.
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