EP0861425A1 - Procede d'evaluation du signal emis par un thermometre a infrarouge et thermometre a infrarouge approprie - Google Patents

Procede d'evaluation du signal emis par un thermometre a infrarouge et thermometre a infrarouge approprie

Info

Publication number
EP0861425A1
EP0861425A1 EP96942272A EP96942272A EP0861425A1 EP 0861425 A1 EP0861425 A1 EP 0861425A1 EP 96942272 A EP96942272 A EP 96942272A EP 96942272 A EP96942272 A EP 96942272A EP 0861425 A1 EP0861425 A1 EP 0861425A1
Authority
EP
European Patent Office
Prior art keywords
measuring
protective film
temperature
signal
measuring cap
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96942272A
Other languages
German (de)
English (en)
Inventor
Frank Beerwerth
Klaus Heubach
Manfred Kaiser
Bernhard Kraus
Katja Honnefeller
Heinz Richter
Albrecht Jestädt
Heinz BÜLTGES
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
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
Priority claimed from DE19543096A external-priority patent/DE19543096C2/de
Priority claimed from DE19600334A external-priority patent/DE19600334C2/de
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of EP0861425A1 publication Critical patent/EP0861425A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/021—Probe covers for thermometers, e.g. tympanic thermometers; Containers for probe covers; Disposable probes
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/026—Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • G01J5/046—Materials; Selection of thermal materials
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • G01J5/049—Casings for tympanic thermometers
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0818—Waveguides
    • 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/80—Calibration

Definitions

  • the invention relates to a method for evaluating the signal of an infrared thermometer according to the preamble of claim 1 and an infrared thermometer according to the preamble of claim 10.
  • thermometer measures the infrared radiation emitted by the measurement object in the direction of the thermometer.
  • the temperature of the object is determined from the intensity of this radiation.
  • the IR radiation is collected with an optical unit (light guide, lens, mirror, etc.) and sent to the detector. The temperature displayed can therefore only be correctly determined if the optical unit is working properly
  • thermometer which works by means of infrared to provide the measuring head with an interchangeable measuring cap which is sufficiently transparent for infrared radiation.
  • the clinical thermometer is provided for measurement in the ear. This means that the measuring head of the thermometer is inserted into the ear and then the temperature is measured.
  • the measuring cap serves the purpose of avoiding contamination of the thermometer. Such contamination could occur, for example, because there is an air gap between the light guide and the outer wall in the measuring head.
  • the outer wall of the measuring head comes into contact with the skin and therefore heats up comparatively quickly.
  • the sensor and also the light guide are thermally insulated from the outer wall. Therefore there is also a gap at the tip of the measuring head between the light guide inside the measuring head and the outer wall of the measuring head. A pollution occurring there could then falsify the measurement signal.
  • the measuring cap if, for example, the thermometer after the temperature measurement in a patient th before using another patient with a new measuring cap becomes.
  • the method according to claim 1 shows that a signal evaluation and thus a determination of the temperature is possible, regardless of whether a measuring cap or a protective film has been applied to the measuring head or not.
  • a measuring cap or a protective film has been applied to the measuring head or not.
  • the method according to claim 1 it is possible to operate the thermometer either with or without a measuring cap .
  • the thermometer can be operated without a measuring cap in the home, ie when the number of persons with whom the thermometer is used.
  • thermometer when used in the hospital, it can also be operated with a measuring cap to transmit diseases to avoid This results in a simplification with regard to the production of the thermometers, since it is not necessary to differentiate between different types of thermometers for home use and for use in clinics.
  • thermometer Even without a measuring cap reduces the operating costs and the generation of waste. Furthermore, the operational readiness is increased, since a measurement is possible even if there are no measuring caps.
  • the method according to claim 2 shows a comparatively simple way of taking into account whether or not a measuring cap was used for the measuring head during the measuring process.
  • the infrared signal to be detected is vaporized.
  • the sensor signal - usually the measured infrared radiation intensity - is then multiplied by a factor which is determined as a function of the transmission of the measuring cap or protective film and, in the case of the thin polyethylene or polypropylene films usually used, approximately 1.08 to 1.2 amounts
  • the method according to claim 3 enables a more precise adjustment of the sensor signal by determining the transmission of the window and, if appropriate, the measuring cap or protective film as a function of the ambient temperature and the object temperature
  • thermometer u U correctly. Incorrect measurements that occur as a result can be avoided if no evaluation of the measurement signal is carried out during this first period of time in order to derive an absolute value of the temperature to be measured
  • This first time period can be predefined or can be determined, for example, by the signal curve of the sensor signal.
  • This first period of time advantageously begins with the actuation of a key or one Switch of the thermometer. It is also conceivable to let this first period of time begin when the sensor signal suggests an increase in temperature. If the thermometer is held in the ear, the detected temperature initially rises until the measuring process has settled to such an extent that the actual temperature is measured. The first time period can therefore begin when the detected temperature has such an increase.
  • the length of this first period of time can be advantageously determined by the signal curve by evaluating the rise in time of the measured temperature. During the settling of the measuring process, the temperature rises comparatively strongly. A criterion for the end of the settling process is then that the change in temperature over time is less than or equal to 0. The criterion for ending the first period of time can then be that the first derivative of the temperature after the time is below a certain threshold value, for example less than or equal to 0.
  • This type of determination of the length of the first time period can advantageously be limited to measurements without a measuring cap or protective film. If a thermometer with a measuring cap or protective film is held in the ear, the measuring cap or protective film heats up relatively strongly at the start of the measurement. As a result, the measuring cap or protective film then emits infrared radiation again. The temperature rise over time does not then become “saturated” but then continues to rise, even if this rise is then less pronounced. It may then not be possible to derive a criterion for the end of the first time period with sufficient accuracy.
  • the method according to claim 5 advantageously shows that it does not matter that the user holds the thermometer in the correct position at a certain point in time. Rather, in the embodiment of the method according to claim 5, several measured values are recorded and the measured value corresponding to the maximum temperature is further evaluated. As a result, there are no measurement errors if the user holds the thermometer too far from the measurement point. If the signal measured at such a moment were evaluated, this would lead to a lower measured temperature.
  • the suppression of the signal evaluation for determining an absolute temperature can advantageously also be omitted during the first time period, since no measurement errors resulting therefrom can occur in this evaluation method.
  • this evaluation method according to claim 5 is therefore particularly suitable for measurements which are carried out with an attached measuring cap or protective film. It is not important in this evaluation method according to claim 5 to correctly determine the first time period, which, for the reasons already described, can possibly lead to problems when measuring with a measuring cap or protective film.
  • the specific time period can be of the order of a few seconds, in particular 2 to 4 seconds.
  • the specific time period follows the first time period.
  • This method according to claim 6 can therefore be used particularly advantageously when a measurement is carried out without a measuring cap or protective film, because then, according to the statements in connection with claim 4, a comparatively reliable determination of the first time period is possible.
  • a measurement process can therefore be terminated after the specified time
  • thermometer in the event that no measuring cap is attached to the thermometer, it is provided that a warning signal is given that indicates that the device has been cleaned. In this way, an operator is informed that the infrared thermometer was used without a measuring cap or a measuring cap that was not already used, and that cleaning before further measurements is necessary. This indicates the risk of incorrect measurements due to possible contamination of the optics or the measuring cap already in use, but the device must have recognized that the measurement is in the temperature range of the body temperature, which is usually only possible if the Measuring head has been inserted into the ear If the window of the measuring head is cleaned again after an incorrect measurement, a test measurement is first carried out. This test process is repeated as soon as a measurement without a measuring cap has been carried out again
  • a healthy person carrying a fever without a fever or a caliber device black body
  • the measurement must then lie in a previously known temperature interval, preferably at least 36 and 37.5 ° C. If the temperature to be measured lies outside this range, both versions are possible that, on the one hand, the device is not activated and remains in test mode, or on the other hand, the device can still be activated.
  • the warning signal can take place, for example, by means of a display, a red lamp with a corresponding label or an acoustic signal
  • a warning signal should also be triggered if an already used measuring cap is to be used for a further measurement. This notifies the user of the path of the possibly soiled measuring cap, so as to avoid possible transmission of disease
  • a sensor is actuated by a measuring cap, then measured and then measured again later without the sensor receiving another pulse, a warning signal is triggered to inform the user of the double use of the measuring cap.
  • the prerequisite for issuing a warning signal is that that the temperature is in the range of the body temperature of the human being during the temperature measurement. All other measurements which lie outside this temperature range do not lead to the triggering of a warning signal, since these measurements assume that it has been carried out outside the human body so that no pollution occurs. Temperature measurements on the surface of the human body are below, for example, 36.5 ° C
  • the infrared thermometer according to claim 10 has a sensor which functions, for example, according to the capacitive, optical, magnetic or mechanical principle of action. It has been shown to be advantageous that the infrared thermometer can be operated both with and without a measuring cap or protective film
  • thermometer without a measuring cap particularly when designing the measuring head according to claim 1 1, cannot lead to impairment of the optics, since it is designed in such a way that easy cleaning is possible.
  • no ear wax can get into a gap between the outer wall and the light guide , since this connection is formed without a gap to the outside.
  • thermometer that is operated entirely without a measuring cap or protective film.
  • thermometer in which operation both with and without a measuring cap or protective film should also be possible, can advantageously be equipped with such a measuring head. It is particularly advantageous in ruckbe ⁇ relation to claim 1 0 that in addition to circumventing the problems with cleaning a great security with regard to signal evaluation can be achieved.
  • the contact surfaces between the window and the outer wall are advantageous possibly . not too large for the light guide, so that the heat conduction via these bridges is largely reduced.
  • thermometer 1 shows a measuring head of an infrared thermometer
  • thermometer 2 shows a process sequence for evaluating a signal in an infrared thermometer, the thermometer being able to be operated both with and without a measuring cap or protective film,
  • Fig. 3 shows a modification of the process flow according to Fig. 2 and
  • FIG. 4 shows an infrared clinical thermometer with a measuring head according to FIG. 1 and an evaluation device according to the method sequence according to FIG. 2 or 3.
  • measuring head 1 shows a possible embodiment of a measuring head 1 of an infrared fever thermometer, with which a fever measurement is carried out in the ear.
  • the measuring head 1 can be used both with and without a measuring cap or protective film 101.
  • This measuring head 1 can thus be used in a device in which no measuring caps or protective foils 101 are provided from the outset, which are pulled over the measuring head 1.
  • this measuring head can advantageously be used in a device in which a measurement should be possible both with and without an attached measuring cap or protective film 101.
  • the outer wall 102 of the measuring head 1 is made of plastic.
  • An infrared-transmissive window 103 is provided at the tip of the measuring head 1. This window 103 is connected to the outer wall 102 without a gap, so that dirt can be removed easily
  • the material of the window 1 03 is advantageously chosen so that only a very small absorption or emission occurs in the wavelength range detected by the sensor 1 06. Otherwise, heating the window 103 during the measurement process led to an emission of infrared radiation and falsify the measurement result, if this effect is not compensated for again.
  • Possible materials for the window 1 03 are, for example, germanium, gallium arsenide, zinc selenide, chalcogenide glasses, oxygen-free silicon, polyethylene, polypropylene or copolymers made of polyethylene and polypropylene. In all cases, the wavelength range to be evaluated must correspond to the pass band of the material of the Window 103 can be limited.
  • thermopile detector 106 For gallium arsenide and various chalcogenide glasses, a thermopile detector with a band filter for 4-1 5 ⁇ m can be used as sensor 106, for example.
  • the wavelength range can be set to 4-23 ⁇ m or 4-20 ⁇ m are enlarged.
  • sensor 106 is designed as a pyroelectric sensor
  • the measuring head 1 has a light guide 104, via which the infrared radiation is guided to the sensor 106 after passing through the window 103.
  • light guide 104 and sensor 106 are used, among other things. thermally insulated from the outer wall 102 of the measuring head 1 by an air gap 1 05.
  • the area of the mechanical contacting of the outer wall 1 02, the window 103 and the light guide 104 is also as small as possible, in order to be there only to achieve the lowest possible heat flow
  • a thermal mass 107 is arranged in the area of the light guide and sensor.
  • This thermal mass can be formed, for example, by a metal block. This reduces temporal temperature changes and temperature gradients.
  • An applied measuring cap or protective film 101 does not transmit all of the incident IR radiation, but rather reflects and absorbs certain portions thereof. Furthermore, the protective cap or protective film 101 itself also emits IR radiation, depending on the temperature. An attached measuring cap or protective film 1 01 is therefore advantageously detected and the measured temperature signals are then evaluated accordingly.
  • the detection of the measuring cap can be carried out, for example, with the aid of a capacitive, optical, magnetic or mechanical detector 108. This detector is advantageously introduced into the outer wall 102 of the measuring head 1
  • Fig. 1 can also be seen that the measuring cap or protective film 1 01 accordingly arrow 109 applied to the measuring head 1 and can be removed again
  • step 201 checks whether a measuring cap or a protective film has been applied to the measuring head or not
  • the signal is evaluated in accordance with a step 202.
  • multiplying the sensor signal by a corresponding correction factor is sufficient.
  • This correction factor for thin PE or PP foils is approximately 1, 08 to 1, 2 This correction factor can also be determined depending on the ambient temperature and / or the temperature of the measurement object.
  • the signal can be evaluated, for example, in accordance with step 301 in such a way that during a first period of time, which is typically of the order of 1 s or 2 s, the measurement signal is not evaluated in order to derive an absolute value of the temperature to be measured If the thermometer u U has not yet correctly positioned during this first period of time, incorrect measurements can be avoided
  • This first time period can be predefined or can be determined, for example, by the signal curve of the sensor signal
  • This first period of time advantageously begins with the actuation of a button or a switch of the thermometer. It is also conceivable to let this first period of time begin when the sensor signal suggests an increase in temperature. If the thermometer is held in the ear, the detected temperature initially rises until the measuring process has settled to such an extent that the actual temperature is measured. The first time period can therefore begin when the detected temperature has such an increase.
  • the length of this first period of time can be advantageously determined by the signal curve by evaluating the rise in time of the measured temperature. During the settling of the measuring process, the temperature rises comparatively strongly. A criterion for the end of the transient process then is that the temporal change in the temperature is less than or equal to 0. The criterion for ending the first time period can then be that the first derivative of the temperature after the time is below a certain threshold value, for example less than or equal to 0.
  • This type of determination of the length of the first period of time can advantageously be limited to measurements without a measuring cap or protective film. If a thermometer with a measuring cap or protective film is held in the ear, the measuring cap or protective film heats up relatively strongly at the start of the test Measurement As a result, the measuring cap or protective film then emits infrared radiation again. The temperature rise over time does not then become “saturated” but then continues to rise, even if this rise is then less pronounced. It may then not be possible to derive a criterion for the end of the first time period with sufficient accuracy
  • step 302 can then take place, for example, by recording several measured values and further evaluating the measured value that corresponds to the maximum temperature. It proves advantageous that it is not necessary for the user to hold the thermometer in the correct position at a certain point in time
  • suppression of the signal evaluation for determining an absolute temperature during the first period of time corresponding to step 301 could advantageously also be omitted, since no measurement errors resulting therefrom can occur in this evaluation method
  • the signal evaluation in step 302 can also take place in that measured values are recorded during a certain period of time and then an average of these measured values is formed during the evaluation. It is advantageous that the errors described above can also be avoided.
  • the determined period of time can be in the order of a few seconds, in particular 2 to 4 seconds. It is particularly advantageous if the measured values are disregarded during the first period of time in accordance with step 301 and therefore cannot falsify the measurement result. In this case it closes the certain period of time thus follows the first period Overall, it has proven to be advantageous for an ear fever thermometer to complete the measurements after a certain time, which is of the order of about 4-5 s. The ear is locally cooled by inserting the measuring head into the ear. This cooling is achieved after a certain time. The measurement is therefore advantageously completed before this cooling leads to an incorrect measurement result.
  • a measurement process can therefore be terminated after the specified time.
  • FIG. 4 shows an infrared clinical thermometer with a measuring head according to FIG. 1 and an evaluation device 402.
  • this evaluation device 402 which can be a controller, for example, the signal evaluation is advantageously carried out according to the process sequence according to FIG. 2 or 3.
  • the evaluation device 402 the signal from detector 108 is supplied. This detector 108 has already been described in connection with FIG. 1. After the signal evaluation, the evaluation device 402 controls a display 403 accordingly.
  • a measuring cap 101 is to be placed on the device, or in the case of changing an existing measuring cap 101, which the user would like to replace with a new measuring cap 101 before using the clinical thermometer , the device switches to operational mode only after a predetermined time.
  • a warning signal is only triggered after a certain, possibly adjustable, delay time if no or the same measuring cap is to be used. Delay times of 3 to 5 seconds, for example, are sufficient for this. If after the expiry of such a delay time a lack of the measuring cap 1 01 is determined, the user is signaled by the first warning signal that a measuring cap 101 should be placed on the window or the radiation entrance opening of the measuring head 1.
  • the detector 108 registers the state "measuring cap not put on” and passes this signal on to the evaluation unit 402, which leads to the lamp or light-emitting diode lighting up clearly as a warning signal or blinks. This indicates to an operator that no measuring cap is pushed onto the housing section or that the measuring cap is not properly placed on the front cylindrical housing section, so that the temperature measurement can be falsified due to possible contamination, the temperature value determined in this way being approximately in the range human body temperature.
  • a further light-emitting diode is provided, which generally indicates to the operator that no measuring cap is fitted, while the first light-emitting diode signals to the operator that a measurement in the body temperature range was carried out without a measuring cap and therefore also to provide information that the measured value is incorrect can be the information that cleaning of the radiation opening is necessary in order to avoid a subsequently falsified temperature measurement, for example with a newly attached measuring cap 5.
  • a warning signal is also issued if a sensible temperature value that is greater than e.g. 36.5 ° C was measured, but no new measuring cap 101 was used.
  • the warning signal indicates that the detector 1 08 did not register a change of the measuring cap, and thus there are hygienic reservations or that the measurement may be falsified by the contamination of the measuring cap.

Abstract

L'invention concerne un procédé d'évaluation du signal d'un thermomètre à infrarouge servant à mesurer la température du corps humain. Ce thermomètre à infrarouge comprend une tête de mesure sur laquelle peut être placé un cache de mesure ou une pellicule de protection, suffisamment transparent(e) pour laisser passer le rayonnement infrarouge. Lors d'une opération de mesure avec cache de mesure ou pellicule de protection 'mis(e) en place', le signal est évalué. L'invention se caractérise en ce qu'elle permet également d'effectuer des mesures, sans présence de cache de mesure ou de pellicule de protection, et de prendre en compte en conséquence le rayonnement infrarouge plus intense qui intervient, par évaluation différente du signal.
EP96942272A 1995-11-18 1996-11-18 Procede d'evaluation du signal emis par un thermometre a infrarouge et thermometre a infrarouge approprie Withdrawn EP0861425A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19543096A DE19543096C2 (de) 1995-11-18 1995-11-18 Infrarot-Strahlungsthermometer
DE19543096 1995-11-18
DE19600334A DE19600334C2 (de) 1996-01-08 1996-01-08 Verfahren zur Auswertung des von einem Infrarotsensor eines Infrarot-Thermometers gelieferten Meßsignals sowie Infrarot-Thermometer
DE19600334 1996-01-08
PCT/EP1996/004932 WO1997019331A1 (fr) 1995-11-18 1996-11-18 Procede d'evaluation du signal emis par un thermometre a infrarouge et thermometre a infrarouge approprie

Publications (1)

Publication Number Publication Date
EP0861425A1 true EP0861425A1 (fr) 1998-09-02

Family

ID=26020475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96942272A Withdrawn EP0861425A1 (fr) 1995-11-18 1996-11-18 Procede d'evaluation du signal emis par un thermometre a infrarouge et thermometre a infrarouge approprie

Country Status (5)

Country Link
US (1) US6195581B1 (fr)
EP (1) EP0861425A1 (fr)
JP (1) JP2000500371A (fr)
CN (1) CN100514012C (fr)
WO (1) WO1997019331A1 (fr)

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CN100514012C (zh) 2009-07-15
CN1202242A (zh) 1998-12-16
JP2000500371A (ja) 2000-01-18
US6195581B1 (en) 2001-02-27

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