Method for identifying analog measuring sensors and associated assembly
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-029/22
G01R-029/00
G01R-027/08
출원번호
UP-0578306
(2004-10-29)
등록번호
US-7564251
(2009-07-29)
우선권정보
DE-103 51 356(2003-11-04)
국제출원번호
PCT/EP04/052714
(2004-10-29)
§371/§102 date
20060504
(20060504)
국제공개번호
WO05/045783
(2005-05-19)
발명자
/ 주소
Rupp, Jürgen
출원인 / 주소
Siemens Aktiengesellschaft
대리인 / 주소
Staas & Halsey LLP
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
Individual measuring sensors each have a different specific signal type and must therefore be appropriately connected to the analog measuring inputs. An adjustable voltage with adjustable current limitation, or an adjustable current with adjustable voltage clamping is used. The voltage or current is
Individual measuring sensors each have a different specific signal type and must therefore be appropriately connected to the analog measuring inputs. An adjustable voltage with adjustable current limitation, or an adjustable current with adjustable voltage clamping is used. The voltage or current is connected to the measuring sensors and the corresponding signal is detected and classified according to the sensor type. This permits the automated integration of the measuring sensor. The corresponding assembly can form part of the complete module.
대표청구항▼
The invention claimed is: 1. A method for identifying an analog measuring sensor in a measurement and automation technology circuit, each measuring sensor having a specific signal type, the method comprising: using either an adjustable voltage source with an adjustable current limiter or alternativ
The invention claimed is: 1. A method for identifying an analog measuring sensor in a measurement and automation technology circuit, each measuring sensor having a specific signal type, the method comprising: using either an adjustable voltage source with an adjustable current limiter or alternatively an adjustable current source with an adjustable voltage limiter; connecting the voltage source or the current source to the measuring sensor and varying the voltage or current with time; when using the voltage source, detecting the current; when using the current source, detecting the voltage; and classifying the sensor according to the applied voltage and detected current or applied current and detected voltage, wherein a thermocouple is identified using a high-resistance voltage source, a far distant line short-circuit, and/or a low-resistance resistive sensor. 2. The method in accordance with claim 1, wherein a thermocouple is detected by a selective excitation of the thermoelectric effect, and selective excitation of the thermoelectric effect is achieved by an injected current. 3. The method in accordance with claim 2, wherein the injected current causes warming at a measurement point in the sensor, and cooling at a compensation point in the sensor. 4. The method in accordance with claim 3, wherein reversing polarity for the injected current causes the measurement point to be cooled and the compensation point to be warmed. 5. The method in accordance with claim 3, wherein after the injected current is switched off, the thermocouple exhibits a decay curve, and the decay curve is detected. 6. The method in accordance with claim 4, wherein after the injected current is switched off, the thermocouple exhibits a decay curve, and the decay curve is detected. 7. A device for identifying an analog measuring sensor, comprising: an adjustable voltage source with a pre-specifiable current limiter or an adjustable current source with a pre-specifiable voltage limiter, the voltage source or the current source being connected to the measuring sensor; an output device to measure how the sensor responds to the voltage source or the current source, and to produce a characteristic signal curve; and a discrimination unit to identify the sensor based on the characteristic signal curve, wherein a thermocouple is identified using a high-resistance voltage source, a far distant line short-circuit, and/or a low-resistance resistive sensor. 8. The device in accordance with claim 7, wherein the system is part of a module attached to an industrial automation system. 9. A method for identifying an analog measuring sensor in a measurement and automation technology circuit, each measuring sensor having a specific signal type, the method comprising: using either an adjustable voltage source with an adjustable current limiter or alternatively an adjustable current source with an adjustable voltage limiter; connecting the voltage source or the current source to the measuring sensor and varying the voltage or current with time when using the voltage source, detecting the current; when using the current source, detecting the voltage; and classifying the sensor according to the applied voltage and detected current or applied current and detected voltage, wherein the sensor is classified as a line short-circuit sensor using a voltage source of 0 V with a low internal resistance, and detecting no current limitation in a measurement range. 10. A method for identifying an analog measuring sensor in a measurement and automation technology circuit, each measuring sensor having a specific signal type, the method comprising: using either an adjustable voltage source with an adjustable current limiter or alternatively an adjustable current source with an adjustable voltage limiter; connecting the voltage source or the current source to the measuring sensor and varying the voltage or current with time; when using the voltage source, detecting the current; when using the current source, detecting the voltage; and classifying the sensor according to the applied voltage and detected current or applied current and detected voltage, wherein the sensor is classified as a line break sensor using a current source with an output current of 0 mA and a high resistance, and detecting no voltage limitation. 11. A device for identifying an analog measuring sensor, comprising: an adjustable voltage source with a pre-specifiable current limiter or an adjustable current source with a pre-specifiable voltage limiter, the voltage source or the current source being connected to the measuring sensor; an output device to measure how the sensor responds to the voltage source or the current source, and to produce a characteristic signal curve; and a discrimination unit to identify the sensor based on the characteristic signal curve, wherein the sensor is classified as a line short-circuit sensor using a voltage source of 0 V with a low internal resistance, and detecting no current limitation in a measurement range. 12. A device for identifying an analog measuring sensor, comprising: an adjustable voltage source with a pre-specifiable current limiter or an adjustable current source with a pre-specifiable voltage limiter, the voltage source or the current source being connected to the measuring sensor; an output device to measure how the sensor responds to the voltage source or the current source, and to produce a characteristic signal curve; and a discrimination unit to identify the sensor based on the characteristic signal curve, wherein the sensor is classified as a line break sensor using a current source with an output current of 0 mA and a high resistance, and detecting no voltage limitation.
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