United States Patent (19)
`Hong
`
`III IIHIIII
`US005.559497A
`11
`Patent Number:
`5,559,497
`(45) Date of Patent:
`Sep. 24, 1996
`
`(54 BODY TEMPERATURE SENSING AND
`ALARMING DEVICE
`
`4,297,685 10/1981 Brainard, II ............................ 340/573
`4,679,036 7/1987 Cheng ..................................... 340/.573
`4,819,860 4/1989 Hargrove et al. ....................... 340/573
`4,865,044 9/1989 Wallace et al. ......................... 3401573
`76 Inventor: Chia-Ping Hong, P.O. Box 1750,
`Primary Examiner-Jeffery Hofsass
`Taichung, Taiwan
`Assistant Examiner-Benjamin C. Lee
`21 Appl. No.: 345,944
`ppl. No.:
`y
`(57)
`ABSTRACT
`22). Filed:
`Nov. 28, 1994
`A device is attached to various portions of the human body
`(51) int. Cl. ............................................. GB 300
`for detecting body temperature and includes a sensor for
`(52) U.S. Cl. .......................... 340/573; 340/584; sis. sensing body temperature, and a converter for converting the
`u
`body temperature into a reference value. The reference value
`58) Field of Search ..................................... 340/573,584,
`is transmitted into a comparator which compares the refer
`340/586; 128/736
`ence value with another reference value. When the body
`temperature is increased for more than a predetermined
`value, an alarm will generate an alarm signal for alarming
`that the body temperature is too high.
`
`(56
`
`References Cited
`U.S. PATENT DOCUMENTS
`6/1980 Lassen .................................... 340/.573
`4,205,671
`4.278,970 7/1981 Streczyn et al. ........................ 340/573
`
`
`
`33
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`36
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`1 Claim, 4 Drawing Sheets
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`Sep. 24, 1996
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`Sheet 1 of 4
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`5,559,497
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`U.S. Patent
`US. Patent
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`Sep. 24, 1996
`Sep. 24, 1996
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`Sheet 2 of 4
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`U.S. Patent
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`Sheet 3 of 4
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`U.S. Patent
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`Sep. 24, 1996
`Sep. 24, 1996
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`Sheet 4 of 4
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`5,559,497
`5,559,497
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`5,559,497
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`1.
`BODY TEMPERATURE SENSING AND
`ALARMNG DEVICE
`
`BACKGROUND OF THE INVENTION
`1. Field of the Invention
`The present invention relates to a temperature sensing
`device, and more particularly to a body temperature sensing
`and alarming device.
`2. Description of the Prior Art
`Typically, clinical thermometers are required for measur
`ing the body temperature. Particularly, when taking care of
`babies, the parents and the nurses should measure the
`babies' temperature frequently with the clinical thermom
`eters so as to know whether the babies have a temperature
`or not. This is inconvenient particularly in the night.
`The present invention has arisen to mitigate and/or obvi
`ate the afore-described disadvantages of the conventional
`body thermometers.
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`comparator means coupled to the adder means and the
`converting means for comparing the first reference value
`with the second reference value, and alarming means
`coupled to the comparator means for generating alarm
`signals when the first reference value reaches the second
`reference value.
`Further objectives and advantages of the present invention
`will become apparent from a careful reading of the detailed
`description provided hereinbelow, with appropriate refer
`ence to the accompanying drawings.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 is a perspective view of a body temperature
`sensing and alarming device in accordance with the present
`invention;
`FIG. 2 is a perspective view illustrating another applica
`tion of the body temperature sensing and alarming device in
`accordance with the present invention; and
`FIGS. 3, 4 and 5 are block diagrams illustrating three
`applications of the control circuit for the body temperature
`sensing and alarming device.
`
`DETAILED DESCRIPTION OF THE
`PREFERREED EMBODIMENT
`Referring to FIG. 1, a body temperature sensing and
`alarming device in accordance with the present invention
`comprises a housing 1 attached to the human body by a belt
`means 2. It is preferable that the belt means 2 may attach the
`housing 1 to the wrist portion of human body. The housing
`1 may include a parallelepiped body as shown in FIG. 1, or
`may be formed to a toy shape as shown in FIG. 2. Similarly,
`the housing 1 may beformed into various kinds of shapes for
`attracting babies. A control device 3 is disposed in the
`housing 1 and includes a sensor 31 for contacting with the
`human body and for sensing body temperature, and an alarm
`device, such as a buzzer 32 for alarming people when the
`sensor detects a body temperature higher than a predeter
`mined value. A packing or a pad 11 may be provided
`between the sensor 31 and the housing 1 so as to prevent the
`sensor 31 from contacting with other objects, such that the
`sensor 31 may exactly detect the body temperature.
`Normal body temperature is 36.5° C. However, the body
`temperature in the wrist portion is slightly lower than 36.5°
`C. and normally ranges from 28°C. to 36° C. When the body
`temperature sensing and alarming device in accordance with
`the present invention is attached to the wrist portion, the
`sensor 31 should be calibrated to sense the body temperature
`in the wrist portion, which will be described hereinafter. The
`device may also be attached to other portion of the human
`body including waist portion, feet, etc.
`Referring next to FIG. 3, the control device 3 includes a
`sensor 31, two temperature/voltage converters 33, 34
`coupled to the sensor 31, a delay circuit 35 coupled to one
`of the converters 33, a locking circuit 36, a comparator 37
`coupled to the other converter 34 and to the locking circuit
`36, an adjusting member 371 coupled to the comparator 37,
`and the buzzer 32 coupled to the comparator 37.
`When the device is attached to the wrist portion of the
`human body, the sensor 31 may detect the body temperature,
`the converters 33,34 may convert the body temperature into
`voltage, for example, 1° C. may be converted into 1 mv. The
`reference voltages for the wrist portion will thus be ranged
`from 28 mv to 36 mv. The delay circuit 35 is coupled to the
`converter 33 for controling the converter 33 to convert the
`
`SUMMARY OF THE INVENTION
`The primary objective of the present invention is to
`provide a device for sensing the body temperature and for
`generating alarm signals when the body temperature reaches
`a predetermined value.
`In accordance with one aspect of the invention, there is
`provided a device comprising means for sensing body
`temperature, comparator means coupled to the sensing
`means and including a reference value and a predetermined
`value for comparing the body temperature with the reference
`value, and alarming means coupled to the comparator means
`for generating alarm signals when the body temperature
`reaches an adding value of the reference value and the
`predetermined value.
`In accordance with another aspect of the invention, there
`is provided a device comprising means for sensing body
`temperature, a first converting means for converting the
`body temperature into a first reference value, a second
`converting means for converting the body temperature into
`a second reference value, comparator means coupled to the
`first and the second converting means for comparing the first
`reference value with the second reference value, and alarm
`ing means coupled to the comparator means for generating
`alarm signals when the first reference value is higher than
`the second reference value for a predetermined value.
`In accordance with a further aspect of the invention, there
`is provided a device comprising means for sensing body
`temperature, a first converting means for converting the
`body temperature into a first reference value, adder means
`coupled to the first converting means for adding a predeter
`mined value to the first reference value so as to form a
`second reference value, a second converting means for
`converting the body temperature into a third reference value,
`comparator means coupled to the adder means and the
`second converting means for comparing the third reference
`value with the second reference value, and alarming means
`coupled to the comparator means for generating alarm
`signals when the third reference value reaches the second
`reference value.
`In accordance with still another aspect of the invention,
`there is provided a device comprising means for sensing
`body temperature, means for converting the body tempera
`ture into a first reference value, adder means coupled to the
`converting means for adding a predetermined value to the
`first reference value so as to form a second reference value,
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`body temperature into voltage within a predetermined time
`interval, preferably ranging from one to two minutes. The
`converted voltages within this time interval are locked in the
`locking circuit 36 and provided to the comparator 37 as a
`reference value. When the body temperature is increased for
`a predetermined value, 0.6°C. or 0.6 mv for example, the
`comparator 37 may energize the buzzer 32 right away so as
`to generate an alarm signal.
`Referring next to FIG. 4, an adder 38 is further provided
`between the converter 33 and the locking circuit 36 for
`adding a predetermined value, 0.6° C. or 0.6 mv for
`example, to the converted value before the converted value
`is transmitted into the comparator 37. The reference value
`will thus be the converted value and the predetermined value
`of the adder 38. In this case, when the detected body
`temperature reaches the reference value, the buzzer 32 will
`be energized for alarming purposes.
`Referring next to FIG. 5, in this embodiment, only one
`converter 33 is used and coupled to the delay circuit 35 and
`the comparator 37. An adder 38 is coupled between the
`locking circuit 36 and the comparator 37. In this embodi
`ment, the converted voltage from the converter 33 is directly
`transmitted to the comparator 37 as a reference value, and is
`added with the value of the adder 38. When the detected
`body temperature reaches the sum of the reference value and
`the predetermined value, the buzzer 32 will be energized for
`alarming purposes.
`Accordingly, the body temperature sensing and alarming
`device in accordance with the present invention may be
`attached to the human body for detecting the body tempera
`
`4
`ture and for generating alarm signals when the body tem
`perature increases more than a predetermined value.
`Although this invention has been described with a certain
`degree of particularity, it is to be understood that the present
`disclosure has been made by way of example only and that
`numerous changes in the detailed construction and the
`combination and arrangement of parts may be resorted to
`without departing from the spirit and scope of the invention
`as hereinafter claimed.
`I claim:
`1. A device comprising:
`means for sensing body temperature and outputting tem
`perature signals over time,
`a first converting means for converting a sensed body
`temperature signal into a first reference value,
`adder means coupled to said first converting means for
`adding a predetermined value to said first reference
`value so as to form a second reference value,
`a second converting means for converting a sensed body
`temperature delayed in time from said body tempera
`ture signal converted by said first converting means
`into a third reference value,
`comparator means coupled to said adder means and said
`second converting means for comparing said third
`reference value with said second reference value, and
`alarming means coupled to said comparator means for
`generating alarm signals when said third reference
`value reaches said second reference value.
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