WO2002079736A1 - Method and measuring device for detecting the intensity of radiation and radial intensity in the uv area - Google Patents

Method and measuring device for detecting the intensity of radiation and radial intensity in the uv area Download PDF

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Publication number
WO2002079736A1
WO2002079736A1 PCT/DE2002/001122 DE0201122W WO02079736A1 WO 2002079736 A1 WO2002079736 A1 WO 2002079736A1 DE 0201122 W DE0201122 W DE 0201122W WO 02079736 A1 WO02079736 A1 WO 02079736A1
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WIPO (PCT)
Prior art keywords
converter
intensity
microprocessor
interface
sensor
Prior art date
Application number
PCT/DE2002/001122
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German (de)
French (fr)
Inventor
Rolf Ziegler
Original Assignee
Rolf Ziegler
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 Rolf Ziegler filed Critical Rolf Ziegler
Priority to DE10291385T priority Critical patent/DE10291385D2/en
Publication of WO2002079736A1 publication Critical patent/WO2002079736A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits

Definitions

  • the invention relates to a ner driving and a measuring arrangement for detecting irradiance and radiance in UN measurement technology, in which an electrical signal is generated with a UN sensor and processed in a selection device.
  • UN-sensitive sensors in particular in the form of photodiodes, to measure irradiance and radiance.
  • these sensors are usually coupled to an evaluation device via a voltage or current interface.
  • Si, GaP or SiC photodiodes are usually used as sensors for this.
  • To measure absolute values in mW / m 2 it is necessary to calibrate the sensors to the final value of the associated analog interface.
  • the invention is based on the object of specifying a method and an arrangement of the type mentioned at the outset with which as large a part of the linear working range of the sensor as possible is detected with only one calibration process and which requires only little effort.
  • the object is achieved by a method which is that in claim 1 and by an arrangement that is specified in claim 2
  • the solution according to the invention is characterized by a number of advantages. These include in particular:
  • the signals are digitally transmitted so that the limitation of the working area for analog signals is not effective.
  • the digital interface also ensures high immunity to interference. Since no signal to be disturbed leaves the sensor housing, there is a high one Analogstörfestmaschine. No adaptation is required for successor systems.
  • the measurement arrangement can be adjusted in a simple manner by means of a computer and can also be automated if necessary.
  • the measuring amplifier can be integrated in the measuring arrangement or directly on the sensor.
  • AD converters and microprocessors can also be integrated for signal conversion and processing.
  • the measuring amplifier can be made switchable, so that the entire linear working range of the photodiode can be covered.
  • a standard interface can be used, e.g. B. RS 485, RS 232, RS 422 or fieldbus systems.
  • a uniform software can be created to operate the arrangement.
  • the measured radiation values can be output in suitable protocols (e.g. ASCII).
  • Figure 1 is a block diagram of the circuit arrangement
  • Figure 2 is a schematic representation of an arrangement with several sensor arrangements.
  • Figure 1 explains the operation of the measuring arrangement.
  • a signal generated by the photodiode FD is amplified and converted by means of a current / voltage converter I / U, the amplification being able to be changed by a microprocessor ⁇ PC.
  • the amplified analog signal is digitized by an analog-digital converter ADW, processed in the microprocessor ⁇ PC and finally brought into the desired protocol form.
  • the processing in the microprocessor ⁇ PC takes into account the calibration of the system and the set one
  • the arrangement is connected to a bus system with which a connected device can request the determined data via the SS interface.
  • a commercially available interface e.g. RS 485 can be used.
  • FIG. 2 shows an example of a system in which the irradiance of a flowing liquid is monitored with a large number of sensor arrangements S1 ... Sn connected in parallel.
  • the measuring arrangements explained in FIG. 1 serve as sensor arrangements S1 ... Sn.
  • An address is assigned to each individual sensor arrangement Si.
  • Monitoring, eg the flow rate of the flowing liquid, is carried out with an incremental flow meter IDM. All information is fed to a monitoring unit ÜE.
  • the individual elements are coupled to one another via data lines and the power supply lines Un and M.
  • the data lines consist of a line A and line B.
  • the system can be connected to a display device AE of a programmable logic controller PLC, a personal computer PC and a customer-specific controller St.

Abstract

The invention relates to a method and measuring device for detecting the intensity of rays and the radial intensity in the UV area. Said method and measuring device are characterised in that the signal from the UV-sensor is amplified and converted by a I/U converter with variable amplification, then digitised by an AD converter and processed taking into account the calibration and the adjusted amplification before being transformed into a desired protocol form. A photodiode is connected to a microprocessor via an I/U converter and an analog-digital-converter, siad converter being connected to an interface, and the intensity of the I/U-converter is controlled by the microprocessor.

Description

Nerfahren und Messanordnung zur Erfassung von Bestrahlungsstärken und der Strahldichten im UN-Bereich Ner driving and measuring arrangement for recording irradiance and radiance in the UN area
Die Erfindung betrifft ein Nerfahren und eine Messanordnung zur Erfassung von Bestrahlungsstärken und Strahldichten in der UN-Messtechnik, bei dem mit einem UN-Sensor ein elektrisches Signal erzeugt und in einer Auswcrtccinhcit verarbeitet wird.The invention relates to a ner driving and a measuring arrangement for detecting irradiance and radiance in UN measurement technology, in which an electrical signal is generated with a UN sensor and processed in a selection device.
In der UN-Messtechnik ist es bekannt, zur Messung von Bestrahlungsstärken und Strahldichten UN-empfindliche Sensoren, insbesondere in Form von Fotodioden, zu verwenden. Zur elektronischen Auswertung werden diese Sensoren in der Regel über eine Spannungs- oder Stromschnittstelle mit einer Auswertecinrich- tung gekoppelt. Als Sensoren werden hierfür üblicherweise Si-, GaP- oder SiC-Fotodioden verwendet. Zur Messung von Absolutwerten in mW/m2 ist es erforderlich, die Sensoren auf den Endwert der zugehörigen Analogschnittstelle zu kalibrieren.In UN measurement technology, it is known to use UN-sensitive sensors, in particular in the form of photodiodes, to measure irradiance and radiance. For electronic evaluation, these sensors are usually coupled to an evaluation device via a voltage or current interface. Si, GaP or SiC photodiodes are usually used as sensors for this. To measure absolute values in mW / m 2 , it is necessary to calibrate the sensors to the final value of the associated analog interface.
Um für verschiedene Anwendungsfälle Messungen durchführen zu können, wird eine Vielzahl verschieden geeichter Sensoren benötigt. Nachteilig ist dabei, dass analoge Standardschnittstellen den gesamten linearen Bereich des Sensors nicht übertragen können.In order to be able to carry out measurements for different applications, a large number of differently calibrated sensors are required. The disadvantage here is that analog standard interfaces cannot transmit the entire linear range of the sensor.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Anordnung der eingangs genannten Art anzugeben, mit der ein möglichst großer Teil des linearen Arbeitsbereichs des Sensors mit nur einem Kalibriervorgang erfasst wird und das nur einen geringen Aufwand erfordert.The invention is based on the object of specifying a method and an arrangement of the type mentioned at the outset with which as large a part of the linear working range of the sensor as possible is detected with only one calibration process and which requires only little effort.
Erfindungsgemäß wird die Aufgabe mit einem Verfahren, welches die in Anspruch 1 und mit einer Anordnung, welche die in Anspruch 2 angegebenenAccording to the invention, the object is achieved by a method which is that in claim 1 and by an arrangement that is specified in claim 2
Merkmale enthält, gelöst.Features contains, solved.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.Advantageous refinements are specified in the subclaims.
Die erfindungsgemäße Lösung zeichnet sich durch eine Reihe von Vorteilen aus. Hierzu zählen insbesondere:The solution according to the invention is characterized by a number of advantages. These include in particular:
1. Es erfolgt eine digitale Übertragung der Signale, so dass die für analoge Signale bestehende Begrenzung des Arbeitsbereichs nicht wirksam ist. Ferner gewährleistet die Digitalschnittstellc ein hohe Störfestigkeit. Da kein zu störendes Signal das Sensorgehäuse verlässt, besteht eine hohe Analogstörfestigkeit. Es wird keinerlei Anpassung für Nachfolgesysteme benötigt. Der Abgleich der Messanordnung ist in einfacher Weise mittels Computer möglich und kann gegebenenfalls auch automatisiert erfolgen.1. The signals are digitally transmitted so that the limitation of the working area for analog signals is not effective. The digital interface also ensures high immunity to interference. Since no signal to be disturbed leaves the sensor housing, there is a high one Analogstörfestigkeit. No adaptation is required for successor systems. The measurement arrangement can be adjusted in a simple manner by means of a computer and can also be automated if necessary.
2. Der Messverstärker kann in die Messanordnung oder direkt am Sensor integriert werden. Ferner können zur Signalwandlung und Aufbereitung AD-Wandler und Mikroprozessor integriert werden.2. The measuring amplifier can be integrated in the measuring arrangement or directly on the sensor. AD converters and microprocessors can also be integrated for signal conversion and processing.
3. Der Messverstärker kann umschaltbar ausgeführt werden, so dass der gesamte lineare Arbeitsbereich der Fotodiode überdeckt werden kann.3. The measuring amplifier can be made switchable, so that the entire linear working range of the photodiode can be covered.
Dadurch ist es auch nicht erforderlich, für jeden Anwendungsfall eine gesonderte Kalibrierung durchzuführen, so dass der Material- und Kostenaufwand für die Lagerhaltung erheblich reduziert werden kann. Es kann ein Sensor für alle Anwendungsfälle verwendet werden, so dass keine Sensorvariationen erforderlich sind.As a result, it is also not necessary to carry out a separate calibration for each application, so that the cost of materials and costs for warehousing can be considerably reduced. One sensor can be used for all applications, so that no sensor variations are required.
4. Es kann eine Standardschnittstelle verwendet werden, z. B. RS 485, RS 232, RS 422 oder Feldbussysteme.4. A standard interface can be used, e.g. B. RS 485, RS 232, RS 422 or fieldbus systems.
5. Es ist möglich, nicht flüchtige Speicher zum Speichern von Kalibrierwerten zu integrieren.5. It is possible to integrate non-volatile memories for storing calibration values.
6. Zum Betrieb der Anordnung kann eine einheitliche Software erstellt werden.6. A uniform software can be created to operate the arrangement.
7. Die gemessenen Bestrahlungs werte können in geeigneten Protokollen (z.B. ASCII ) ausgegeben werden.7. The measured radiation values can be output in suitable protocols (e.g. ASCII).
8. Eine größere Anzahl von Sensoren lassen sich bei Verwendung eines geeigneten Bus-Systems parallel schalten. Die Erfindung wird im Folgenden an einem Ausführungsbeispiel näher erläutert. In der zugehörigen Zeichnung zeigen:8. A larger number of sensors can be connected in parallel if a suitable bus system is used. The invention is explained in more detail below using an exemplary embodiment. In the accompanying drawing:
Figur 1 ein Blockschaltbild der SchaltungsanordnungFigure 1 is a block diagram of the circuit arrangement
undand
Figur 2 eine schematische Darstellung einer Anordnung mit mehreren Sensoranordnungen.Figure 2 is a schematic representation of an arrangement with several sensor arrangements.
Figur 1 erläutert die Funktionsweise der Messanordnung. Ein von der Fotodiode FD erzeugtes Signal mittels eines Strom/Spannungswandlers I/U verstärkt und gewandelt, wobei die Verstärkung von einem Mikroprozessor μPC verändert werden kann. Das verstärkte analoge Signal wird durch einen Analog-Digital- Wandler ADW digitalisiert, im Mikroprozessor μPC verarbeitet und schließlich in die gewünschte Protokollform gebracht. Die Verarbeitung im Mikroprozessor μPC berücksichtigt die Kalibrierung des Systems sowie die eingestellteFigure 1 explains the operation of the measuring arrangement. A signal generated by the photodiode FD is amplified and converted by means of a current / voltage converter I / U, the amplification being able to be changed by a microprocessor μPC. The amplified analog signal is digitized by an analog-digital converter ADW, processed in the microprocessor μPC and finally brought into the desired protocol form. The processing in the microprocessor μPC takes into account the calibration of the system and the set one
Verstärkung.Gain.
Die Anordnung ist mit einem Bussystem verbunden, mit dem ein angeschlossenes Gerät über die Schnittstelle SS die ermittelten Daten anfordern kann. Als Schnittstelle SS kann eine handelsübliche Schnittstelle, z.B. RS 485, verwendet werden.The arrangement is connected to a bus system with which a connected device can request the determined data via the SS interface. A commercially available interface, e.g. RS 485 can be used.
Die variable Verstärkung des I/U-Wandlers ermöglicht es, das der Analog-Digital- Wandlers ADW immer im optimalen Arbeitsbereich betrieben wird, was eine hohe Genauigkeit gewährleistet. Relevante Informationen, wie Kalibrierdaten, Seriennummern, Produktionsdaten, Qualitätsdaten, Adressen etc. können in einem an den Mikroprozessor μPC angeschlossenen EEPROM gespeichert werden. In Figur 2 ist ein Beispiel für eine Anlage dargestellt, bei der die Bestrahlungsstärke einer strömenden Flüssigkeit mit einer Vielzahl von parallel geschalten Sensoranordnungen Sl ... Sn überwacht wird. Als Sensoranordnungen Sl ... Sn dienen die in Figur 1 erläuterten Messanordnungen. Jeder Einzel sensoranordnung Si ist dabei eine Adresse zugeordnet. Die Überwachung, z.B. der Durchflussmenge der strömenden Flüssigkeit, erfolgt mit einem inkrementalen Durchflussmesser IDM. Alle Informationen werden einer Überwachungseinheit ÜE zugeführt. Die einzelnen Elemente sind über Datenleitungen sowie die Stromversorgungsleitungen Un und M miteinder gekoppelt. Die Datenleitungen bestehen im dargestellten Beispiel aus einer Leitung A und Leitung B. Die Anlage kann mit einer Anzeigeeinrichtung AE einer speicherprogrammierbaren Steuerung SPS, einer Personalcomputer PC und einer kundenspezifischen Steuerung St verbunden werden. The variable amplification of the I / U converter enables the analog-digital converter ADW to always be operated in the optimal working range, which ensures high accuracy. Relevant information such as calibration data, serial numbers, production data, quality data, addresses etc. can be stored in an EEPROM connected to the microprocessor μPC. FIG. 2 shows an example of a system in which the irradiance of a flowing liquid is monitored with a large number of sensor arrangements S1 ... Sn connected in parallel. The measuring arrangements explained in FIG. 1 serve as sensor arrangements S1 ... Sn. An address is assigned to each individual sensor arrangement Si. Monitoring, eg the flow rate of the flowing liquid, is carried out with an incremental flow meter IDM. All information is fed to a monitoring unit ÜE. The individual elements are coupled to one another via data lines and the power supply lines Un and M. In the example shown, the data lines consist of a line A and line B. The system can be connected to a display device AE of a programmable logic controller PLC, a personal computer PC and a customer-specific controller St.
BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS
FD FotodiodeFD photodiode
I/U I/U-WandlerI / U I / U converter
ADW Analog-Digital-Wandler μPC MikroprozessorADW analog-digital converter μPC microprocessor
SS SchnittstelleSS interface
IDM inkrementaler DurchflussmesserIDM incremental flow meter
SPS speicherprogrammierbare SteuerungPLC programmable logic controller
PC P ersonalcomputerPC Personal computer
A,B DatenleitungA, B data line
Un BetriebsspannungsleitungUn operating voltage line
M MasseleitungM ground line
ÜE ÜberwachungseinheitÜE monitoring unit
AE AnzeigeAE display
St kundenspezifischc SteuerungSt customized control
Sl ... Sn S ensoranordnung Sl ... Sn sensor arrangement

Claims

P A T E N T A N S P R U C H E PATENT CLAIMS
1. Verfahren zur Messung von Bestrahlungsstärken und Strahldichten in der UV-Messtechnik, bei dem mit einem UV-Sensor ein elektrisches Signal erzeugt und mit einer Auswerteeinheit verarbeitet wird, dadurch gekennzeichnet, dass das Signal des UV-Sensors mittels eines I/U- Wandlers (I/U) mit variabler1. A method for measuring irradiance and radiance in UV measurement technology, in which an electrical signal is generated with a UV sensor and processed with an evaluation unit, characterized in that the signal of the UV sensor by means of an I / U converter (I / U) with variable
Verstärkung verstärkt und gewandelt wird, danach durch einen AD-Wandler (ADW) digitalisiert und unter Berücksichtigung der Kalibrierung sowie der eingestellten Verstärkung verarbeitet und in eine gewünschte Protokollform gebracht wird.Gain is amplified and converted, then digitized by an AD converter (ADW) and processed taking into account the calibration and the set gain and brought into a desired protocol form.
2. Anordnung zur Messung von Bestrahlungsstärken und Strahldichten in der UV-Messtechnik nach dem Verfahrens gemäß Anspruch 1 , dadurch gekennzeichnet, dass eine Fotodiode (FD) über einen I/U-Wandler (I/U) und einen Analog-Digital-Wandler (ADW) an einem Mikroprozessor (μPC) angeschlossen ist, der mit einer Schnittstelle (SS) verbunden ist und die Verstärkung des I/U- Wandlers (I/U) vom Mikroprozessor (μPC) gesteuert wird.2. Arrangement for measuring irradiance and radiance in UV measurement technology according to the method of claim 1, characterized in that a photodiode (FD) via an I / U converter (I / U) and an analog-digital converter ( ADW) is connected to a microprocessor (μPC), which is connected to an interface (SS) and the gain of the I / U converter (I / U) is controlled by the microprocessor (μPC).
3. Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass an die Schnittstelle (SS) über ein Bussystem ein Gerät zur Anforderung der Daten angeschlossen ist.3. Arrangement according to claim 2, characterized in that a device for requesting the data is connected to the interface (SS) via a bus system.
4. Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass am4. Arrangement according to claim 2 or 3, characterized in that on
Mikroprozessor (μPC) ein EEPROM zur Speicherung von Kalibrierdaten, Seriennummern, Produktionsdaten, Qualitätsdaten, Adresse etc. angeordnet ist. Microprocessor (μPC) an EEPROM for storing calibration data, serial numbers, production data, quality data, address etc. is arranged.
5. Anordnung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass mehrere Messanordnungen elektrisch parallel an eine Schnittstelle (SS) angeschlossen sind, die mit Auswerte- und/oder Steuereinrichtungen verbunden sind. 5. Arrangement according to one of claims 2 to 4, characterized in that several measuring arrangements are electrically connected in parallel to an interface (SS), which are connected to evaluation and / or control devices.
PCT/DE2002/001122 2001-03-29 2002-03-27 Method and measuring device for detecting the intensity of radiation and radial intensity in the uv area WO2002079736A1 (en)

Priority Applications (1)

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DE10291385T DE10291385D2 (en) 2001-03-29 2002-03-27 Method and measuring arrangement for recording irradiance and radiance in the UV range

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DE10115683 2001-03-29
DE10115683.9 2001-03-29

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Cited By (1)

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EP1465462A2 (en) * 2003-04-04 2004-10-06 Agilent Technologies, Inc. Ambient light detection with digitized output

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DE4413421C1 (en) * 1994-04-18 1995-09-14 Gta Ingenieurbuero Fuer Geoinf Ultraviolet radiation photometer-dosimeter providing vector readings

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JPH02133627U (en) * 1989-04-12 1990-11-06
US5043608A (en) * 1989-08-24 1991-08-27 Tektronix, Inc. Avalanche photodiode non-linearity cancellation
FR2711792B1 (en) * 1993-10-21 1996-12-20 Instruments Sa Luminous flux measurement device.
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DE4413421C1 (en) * 1994-04-18 1995-09-14 Gta Ingenieurbuero Fuer Geoinf Ultraviolet radiation photometer-dosimeter providing vector readings

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP1465462A2 (en) * 2003-04-04 2004-10-06 Agilent Technologies, Inc. Ambient light detection with digitized output
EP1465462A3 (en) * 2003-04-04 2008-12-17 Avago Technologies ECBU IP (Singapore) Pte. Ltd. Ambient light detection with digitized output
EP2367402A3 (en) * 2003-04-04 2012-06-06 Avago Technologies ECBU IP (Singapore) Pte. Ltd. Ambient light detection with digitized output

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DE10135278A1 (en) 2002-10-24

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