|Publication number||US7014358 B2|
|Application number||US 10/467,309|
|Publication date||Mar 21, 2006|
|Filing date||Feb 2, 2002|
|Priority date||Feb 19, 2001|
|Also published as||CA2437023A1, CA2437023C, CN1212804C, CN1491350A, EP1368625A1, US20040086022, WO2002066947A1, WO2002066947A8|
|Publication number||10467309, 467309, PCT/2002/1735, PCT/EP/2/001735, PCT/EP/2/01735, PCT/EP/2002/001735, PCT/EP/2002/01735, PCT/EP2/001735, PCT/EP2/01735, PCT/EP2001735, PCT/EP2002/001735, PCT/EP2002/01735, PCT/EP2002001735, PCT/EP200201735, PCT/EP201735, US 7014358 B2, US 7014358B2, US-B2-7014358, US7014358 B2, US7014358B2|
|Inventors||Bernhard Kraus, Alexander Klös|
|Original Assignee||Braun Gmbh|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (26), Referenced by (11), Classifications (22), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention relates to a radiation thermometer comprising a heated measuring tip, especially an infrared thermometer for measuring temperature. Such thermometers are known to contain an infrared sensor, an ambient temperature sensor and an evaluating device which determines the temperature of a measurement object from the output signals of the sensors.
An infrared ear thermometer comprising a measuring tip which can be heated by a built-in heating element is known from WO 00/58703. If a heated measuring tip is inserted in an auditory canal, almost no more heat exchange takes place between the measuring tip and the auditory canal so that the measuring tip and the auditory canal are in thermal equilibrium during the temperature measurement. In this way, measurement errors which arise as a result of cooling of the ear canal if the measuring tip inserted in the ear canal is cooler than said canal, are avoided. The ear thermometer is provided with a control device for regulating the temperature of the measuring tip which also determines whether the measuring tip is located in the auditory canal and switches the heating element on or off when the measuring tip is inserted in the auditory canal or withdrawn therefrom.
An infrared thermometer is known from EP 1081475 whose measuring tip can be heated at its anterior end by a heatable infrared sensor arranged there.
The object of the invention is a radiation thermometer comprising a heatable measuring tip and a method of measurement for such a thermometer which allows the same simple operation as is known from thermometers without a heatable measuring tip.
A thermometer according to the invention is provided with a device for controlling the measuring sequence. In a preferred embodiment of a thermometer according to the invention the control device and the evaluating device are combined in a microcontroller or the like which also controls a display device. The measuring sequence is independent of whether the measuring tip is heated directly by a heating element or indirectly by a heatable infrared sensor.
The measuring sequence according to the invention is described in the following. The user will first turn on the thermometer. Turning on the thermometer results in the measuring tip of the thermometer being heated to a specific temperature, for example, to approximately 37° C. This temperature is achieved in a very short time, for example, a few seconds, in a thermometer having a structure known from WO 00/58703 or EP 1081475. The user can now insert the measuring tip of the thermometer into the ear and start the temperature measurement by actuating an actuating device, for example, by pressing a button.
The thermometer according to the invention may also contain a detecting device which establishes whether the measuring tip of the thermometer is inserted in the ear or not. In this case, the insertion of the measuring tip into the ear has the same result as actuation of the actuating device, i.e., after insertion the detection device will establish that the measuring tip is located in the ear and thereupon start the further measuring process without the user needing to actuate a separate actuating device.
With a battery-operated thermometer, it is especially advantageous if the thermometer automatically turns itself off, for example, after 1 minute in order to save current if the user has not yet actuated the actuating device by then.
After the user has actuated the actuating device, with an infrared thermometer according to the invention a measuring process takes place automatically in the following fashion: first, the heating of the measuring tip is discontinued. Preferably after a certain time has elapsed, for example 1 second, the temperature of the measurement object, i.e., especially the body temperature, is measured several times. This delay in the measuring sequence has the advantage that any temperature differences which may be present in the measuring tip or the infrared sensor can be equalized before the temperature measurements. The temperature of the measurement object to be displayed is then determined from the measured temperatures and, at the latest after a maximum measurement time has elapsed or after a maximum number of temperature measurements, is displayed on a display device. However, if the measured temperatures differ too much from one another or a minimum number of successively measured temperatures are not at least approximately the same or do not settle down to a specific value in the course of the measurement process or another suitable criterion for the validity of the measured temperatures is not satisfied, it is advantageous if an error message is output instead of a temperature, which recommends that the user repeats the temperature measuring process. The error message can be output after a minimum measuring time or a minimum number of temperature measurements if a valid temperature value can no longer be expected within the maximum measuring time or after the maximum number of temperature measurements. However, if the measured temperatures do not differ too much from one another or a minimum number of successively measured temperatures are at least approximately the same or settle down to a specific value in the course of the measurement process or another suitable criterion for the validity of the measured temperatures is satisfied, the temperature to be displayed is preferably displayed immediately, i.e. before the maximum measuring time has elapsed or before the maximum number of temperature measurements.
In a preferred embodiment of the thermometer according to the invention, during the current temperature measurements a signalling device is activated by the control device, for example, in the form of a flashing light-emitting diode and/or a series of beeps which indicates to the user that the measuring process is completed, for example, by the light-emitting diode being lit continuously and/or a long-drawn-out beep. In this way the user knows that the measuring process is not complete and he should not withdraw the thermometer from the ear.
An advantageous embodiment of the thermometer according to the invention also has a data storage device and the above-mentioned signalling device by which means the data stored in the data storage device can be output, for example, the measured temperatures, the displayed temperatures, the total number of measuring sequences carried out or the like. For this purpose the flashing of the light-emitting diode or the beeping is coded in a specific fashion so that this data can be recorded by an external reader, decoded, further processed and/or displayed.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3491596||Oct 2, 1967||Jan 27, 1970||Vito Charles P De||Temperature sensing device|
|US4158965 *||Jan 5, 1978||Jun 26, 1979||Electromedics, Inc.||Electronic thermometer with heat conditioned probe|
|US4204429 *||Oct 24, 1978||May 27, 1980||Hitachi Iruma Electronic Company Ltd.||Thermometer using a thermo-sensitive element|
|US4895164 *||Sep 15, 1988||Jan 23, 1990||Telatemp Corp.||Infrared clinical thermometer|
|US5127742 *||Apr 19, 1991||Jul 7, 1992||Thermoscan Inc.||Apparatus and method for temperature measurement by radiation|
|US5293877 *||Dec 11, 1991||Mar 15, 1994||Sherwood Ims, Inc.||Body temperature thermometer and method fo measuring human body temperature utilizing calibration mapping|
|US5522662 *||Mar 31, 1994||Jun 4, 1996||Terumo Kabushiki Kaisha||Clinical thermometer|
|US5632555 *||Nov 3, 1994||May 27, 1997||Diatek, L.P.||Medical thermometer|
|US6109784 *||Oct 5, 1998||Aug 29, 2000||Micro Weiss Electronics||Fast response digital thermometer|
|US6192268 *||Nov 13, 1998||Feb 20, 2001||Citizen Watch Co. Ltd.||Radiation thermometer|
|US6435711 *||Sep 14, 1999||Aug 20, 2002||Jonathan Gerlitz||Infrared ear thermometer|
|US6522912 *||Apr 30, 1999||Feb 18, 2003||Matsushita Electric Industrial Co., Ltd.||Ear type thermometer|
|US6572264 *||Dec 15, 1999||Jun 3, 2003||Citizen Watch Co., Ltd.||Radiation clinical thermometer|
|US6609824 *||Jun 19, 2000||Aug 26, 2003||Omron Corporation||Radiation thermometer|
|US6632016 *||Jul 6, 2001||Oct 14, 2003||Min-Ying Chen||Method of stabilizing an infrared clinical thermometer and the apparatus thereof|
|US20010053171 *||Jun 8, 2001||Dec 20, 2001||Tetsuya Sato||Radiation clinical thermometer and method of measuring body temperature using the radiation clinical thermometer|
|US20030060717 *||Mar 15, 2000||Mar 27, 2003||Bernard Kraus||Infrared Thermometer With Heatable Probe Tip And Protective Cover|
|US20030111605 *||Jan 31, 2002||Jun 19, 2003||Shigemi Sato||Infrared detection element and method for fabricating the same and equipment for measuring temperature|
|US20050094705 *||Mar 17, 2004||May 5, 2005||Microlife Intellectual Property Gmbh||Infrared thermometer and method for determining temperature|
|EP1081475A2||Aug 19, 2000||Mar 7, 2001||Braun GmbH||Infrared detector with temperature stabilisation and infrared thermometer including such a detector|
|JPH03273121A *||Title not available|
|JPH04299225A *||Title not available|
|JPS5425882A *||Title not available|
|JPS6385322A *||Title not available|
|WO1992010133A1||Dec 11, 1991||Jun 25, 1992||Intelligent Medical Systems, Inc.||Infrared thermometer utilizing calibration mapping|
|WO2000058703A1||Mar 10, 2000||Oct 5, 2000||Braun Gmbh||Infrared thermometer with a heatable measuring tip and protective cap|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7284904 *||Mar 18, 2005||Oct 23, 2007||Omron Corporation||Electronic clinical thermometer|
|US7665892||Feb 23, 2010||Actherm Inc.||Infrared thermometer|
|US7841767||Aug 8, 2008||Nov 30, 2010||Covidien Ag||Thermal tympanic thermometer|
|US8657758||Dec 2, 2010||Feb 25, 2014||Welch Allyn, Inc.||Devices and methods for temperature determination|
|US8834019 *||Oct 23, 2009||Sep 16, 2014||Helen Of Troy Limited||Non-contact medical thermometer with stray radiation shielding|
|US20050163190 *||Mar 18, 2005||Jul 28, 2005||Omron Corporation||Electronic clinical thermometer|
|US20080059122 *||Aug 23, 2007||Mar 6, 2008||Sanden Corporation||Transportation management system|
|US20080267254 *||Jun 14, 2007||Oct 30, 2008||Actherm Inc.||Infrared thermometer|
|US20080298429 *||Aug 8, 2008||Dec 4, 2008||Sherwood Services Ag||Thermal tympanic thermometer|
|US20110228811 *||Oct 23, 2009||Sep 22, 2011||Kaz Usa, Inc.||Non-contact medical thermometer with stray radiation shielding|
|WO2014087253A2||Nov 18, 2013||Jun 12, 2014||Kaz Europe Sa||Medical thermometer having an improved optics system|
|U.S. Classification||374/121, 374/E13.003, 600/474, 374/164, 374/133|
|International Classification||A61B6/00, G01K7/00, G01K5/00, A61B5/01, G01K13/00, G01J5/10, G01J5/04|
|Cooperative Classification||G01J5/049, G01J5/02, G01J5/061, G01J5/04, G01J5/026|
|European Classification||G01J5/02G, G01J5/04T, G01J5/04, G01J5/06B, G01J5/02|
|Jan 5, 2004||AS||Assignment|
Owner name: BRAUN GMBH, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRUAS, BERNHARD;KLOS, ALEXANDER;REEL/FRAME:014893/0971
Effective date: 20030827
|Aug 18, 2005||AS||Assignment|
Owner name: BRAUN GMBH, GERMANY
Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE FIRST ASSIGNOR S NAME AND THE ASSIGNEES ADDRESS. DOCUMENT PREVIOUSLY RECORDED AT REEL 014893 FRAME 0971;ASSIGNORS:KRAUS, BERNHARD;KLOS, ALEXANDER;REEL/FRAME:016901/0833
Effective date: 20030827
|Aug 14, 2007||AS||Assignment|
Owner name: KAZ USA, INC., MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRAUN GMBH;REEL/FRAME:019690/0236
Effective date: 20061208
|Aug 21, 2009||FPAY||Fee payment|
Year of fee payment: 4
|Sep 23, 2013||FPAY||Fee payment|
Year of fee payment: 8
|Feb 14, 2014||AS||Assignment|
Owner name: HELEN OF TROY LIMITED, BARBADOS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KAZ USA, INC.;REEL/FRAME:032264/0612
Effective date: 20131101