KR101779837B1 - A device for the measurement of tympanic temperature with non-invasive and zero-heat flux technology - Google Patents
A device for the measurement of tympanic temperature with non-invasive and zero-heat flux technology Download PDFInfo
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- KR101779837B1 KR101779837B1 KR1020150056875A KR20150056875A KR101779837B1 KR 101779837 B1 KR101779837 B1 KR 101779837B1 KR 1020150056875 A KR1020150056875 A KR 1020150056875A KR 20150056875 A KR20150056875 A KR 20150056875A KR 101779837 B1 KR101779837 B1 KR 101779837B1
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- sensor
- temperature
- ear canal
- eardrum
- heat
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- G01K13/002—
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- G01K1/086—
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
- G01K1/165—Special arrangements for conducting heat from the object to the sensitive element for application in zero heat flux sensors
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Abstract
More particularly, the present invention relates to a tympanic membrane temperature measuring device which can be used as a portable device using a battery because it is inserted into the external ear canal 90 and is driven with low power.
A first sensor (10) is installed at a predetermined distance from an eardrum to measure a temperature near the eardrum. A second sensor 20 installed at a predetermined distance from the first sensor 10 in the direction of the entrance of the external ear canal 90 (external auditory meatus) to measure the temperature; A heating wire 30 surrounding the second sensor 20 and supplying a heat amount to the second sensor 20; And an MCU (microcircuit unit) 40 for sensing a temperature difference between the first sensor 10 and the second sensor 20 and supplying electricity to the heat ray 30. [
Description
More particularly, the present invention relates to a device for measuring a temperature of a tympanic membrane, which can be used as a portable device using a battery because it is inserted in an ear canal and driven by a low power, .
The measurement of the core body temperature is an important item for the evaluation of human health and comfort. The international standard ISO 9886 (2004) specifies how to measure the skin temperature and core body temperature of the human body. While skin temperature is easier to measure, deep temperature has been constantly controversial because of its accuracy and continuity, patient annoyance, and health risks.
The oesophageal temperature nearest the heart and the tympanic temperature of the hypothalamus and the artery that are responsible for hyperthermia are considered to be the most reliable data of deep temperature, Because of the inconvenience and risk to health of the subjects during the measurement, they are not used clinically. In order to measure the temperature of the esophagus, it is necessary to insert a sensor into the esophagus. In this process, the patient feels nauseous, which is likely to vomit, and thus the application of the temperature of the tympanic membrane is difficult. In order to alleviate the pain accompanying the sensor, It was difficult to apply.
The rectal temperature of the rectum is easy to measure and can be measured continuously. However, since the time-delay effect responds to environmental or stress changes, , It is estimated that it is not suitable for the experiment. Nonetheless, rectal temperature is the most widely used experimental method in field experiments due to its ease of measurement. Fox et al. (1973) suggested the possibility of measuring deep temperature at the surface of skin. The proposed method is implemented by attaching a first temperature sensor to the surface of the skin, covering the first sensor with the insulator, attaching another second temperature sensor to the surface of the insulator, and placing a heater on the second temperature sensor. The temperature measured by the first temperature sensor attached to the surface of the skin is generally high and the temperature measured by the second temperature sensor located at the atmosphere side is influenced by the environment so that a lower temperature is measured by the first temperature sensor. When two temperature sensors record different temperature values, the heater is turned on and the two temperature sensors continue heating until they reach the same temperature.
Fig. 1 is a conceptual diagram of a deep temperature measurement sensor of a heat flux zero system. In Fig. 1, a thermistor is a sensor for measuring temperature, and a heater is a means for supplying heat so that the temperatures of two thermistors become equal to each other. This measurement method has been named as a zero-heat-flux deep-core thermometer (US Patent Publication No. 2011/0249699).
However, the existing deep temperature zero measuring system developed in the past has a drawback in that it is inconvenient to use AC power because it can not be used in a portable manner due to high power consumption. Therefore, the conventional deep temperature measurement system of the heat flow rate zero system requires equipment such as a large battery when it is required to measure the deep temperature in an outdoor environment without an external power source, And there was a problem such as lack thereof.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for measuring a temperature of a tympanic membrane, which can be used for portable use without reducing the power consumption of the subject without suffering from the pain.
It is another object of the present invention to provide a tympanic membrane temperature measurement apparatus provided with a controller 50 for controlling the temperature of a heater so as to prevent an image of the
It is another object of the present invention to provide a tympanic membrane temperature measurement apparatus including means for preventing damage to the
It is another object of the present invention to provide an eardrum temperature measuring device having an ergonomic structure that is easy to insert into the
Another object of the present invention is to provide a device for measuring a temperature of a tympanic membrane, which can prevent heat loss during tympanic temperature measurement, thereby further reducing power consumption.
Another object of the present invention is to provide a device for measuring the temperature of a tympanic membrane, which can maintain the same pressure in the external
It is another object of the present invention to provide an apparatus for measuring an eardrum having an appropriate length for preventing eardrum damage during eardrum temperature measurement.
In order to accomplish the above object, the present invention provides a blood pressure monitor comprising: a first sensor (10) spaced apart from a eardrum by a predetermined distance and measuring a temperature in the vicinity of the eardrum; A
Further, the present invention is characterized by further comprising a controller 50 for keeping the temperature of the
The controller (50) is controlled by a proportional control or proportional integral control method.
The present invention further includes a
The
The shape of the
Further, the present invention is characterized by further comprising a
The
The
The length of the tympanic membrane temperature measuring device inserted into the
According to the present invention, the eardrum temperature measuring device has an effect of reducing power consumption and being portable.
Further, the present invention has an effect of preventing the image of the
In addition, the present invention has an effect of preventing the
In addition, the present invention has an effect of being easily inserted into the
Further, the present invention has an effect of preventing heat loss when measuring the eardrum temperature.
The present invention also has the effect of keeping the pressure inside and outside of the
In addition, the present invention has an effect of preventing damage to the eardrum when measuring the eardrum temperature.
The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.
FIG. 1 is a conceptual view of a deep temperature measurement sensor of a zero-flow zero-flow system. FIG.
Fig. 2 is a view showing a structure of an ear. Fig.
Figure 3 shows the position of the hypothalamus;
4 is a structural view of a tympanic membrane temperature measuring device according to the present invention.
FIG. 5 is a temperature distribution diagram of an ear canal with a tympanic temperature measuring device according to the present invention installed therein.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.
FIG. 2 shows a structure of an ear, FIG. 3 shows a position of a hypothalamus, and FIG. 4 shows a structure of a tympanic membrane temperature measuring apparatus according to the present invention.
External auditory canal is formed outside the eardrum. Sound comes through the ear canal and causes the eardrum to vibrate. The carotid artery passes around the eardrum, which is shared with the hypothalamus. The hypothalamus is an organ that regulates the body temperature of the human body. It functions to maintain homeostasis by radiating heat or producing heat by vasodilation, sweating, vasoconstriction, tremor, or the like. The temperature of the tympanic membrane indicates the internal temperature of the hypothalamus of the brain.
Accordingly, it is an object of the present invention to provide a method capable of measuring the deep portion temperature from the eardrum in a non-contact manner by specifying the object to be measured with the eardrum as the eardrum and a device implementing the same.
On average, the length of the
In the conventional eardrum temperature measurement method, the temperature was measured by contacting the temperature sensor with the eardrum. At this time, the subject suffered severe pain and anesthesia was required. In severe cases, it could damage the eardrum. Therefore, the conventional tympanic temperature measuring device has been used in animal experiments occasionally and is rarely applied to the human body. In the present invention, since the sensor is not in direct contact with the eardrum, there is no pain and the risk of damage to the eardrum is reduced.
There may be differences in the length of the ear canal for each individual. Therefore, in the present invention, it is preferable that the position of the cover is adjustable in the tympanic membrane temperature measuring device. For this purpose, in the present invention, a
As shown in Fig. 4, the tympanic membrane temperature measuring device of the present invention is inserted into the
When resting, the temperature at which the homeostasis is maintained is about 37 ° C. This temperature rises to 38-39 ° C when you exercise, which is not harmful to your health as the temperature control function is within range. However, if the core temperature is below 28 ° C, serious heart arrhythmias will occur and die. And deep temperature above 46 ° C causes irreparable brain damage (ASHRAE, 1997). In a typical environment, the temperature of the atmosphere is lower than the deep temperature of 37 ° C. The heat is then transferred from the high temperature core to the skin and into the atmosphere.
The apparatus for measuring the temperature of a tympanic membrane of the present invention comprises a first sensor (10) which is spaced apart from a tympanic membrane in a state of being inserted in an ear canal and measures the temperature in the vicinity of the tympanic membrane. It is preferred that the
Next, the present invention further includes a
Next, a
Next, a
The apparatus for measuring a membrane temperature of the present invention may further comprise a microcircuit unit (40) for sensing the temperature difference between the first sensor (10) and the second sensor (20) . 5A, when the temperature measured by the
The temperature of the tympanic membrane indicates the temperature of the hypothalamus of the brain, which is the highest temperature source in the natural state. Therefore, in the natural state column of the eardrum and heat is transferred to the atmosphere along the
When a temperature difference between the
The amount of power to be supplied through PI (proportional and integral) control can be calculated as follows.
here
u (T): control signal, control signal (current or voltage, power)
K p : proportional gain, 1 / PB, PB is the proportional band.
e (T): t set - t a ; error, measured temperature difference between sensor 1 and sensor 2.
T i : integral action time (s), integral execution time.
It is recommended that the temperature difference between the
Since the
To this end, the
As described above, the first sensor, the second sensor, and the
Hereinafter, the operation of the eardrum temperature measuring apparatus of the present invention will be described.
First, the depth of the subject's ear canal to be measured is roughly grasped. Then, the
Carefully insert the
After the
First, the measured temperature of the
If the supply of heat through the hot wire becomes excessive and the state shown in FIG. 5 (c) is reached, the MCU immediately stops supplying heat through the hot wire to the state shown in FIG. 5 (b).
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.
10: first sensor
20: second sensor
30: Heat line
40: microcircuit unit (MCU)
50: Controller
60: Silicone rubber
70: Cover
75: Female threads
80: hole
90: Ear canal
95: eardrum
100: Body
105: male threads
Claims (11)
A first sensor 10 installed in a state exposed to the outside of the front end of the body 100 to measure a temperature of the eardrum at a distance from the eardrum at a distance from the eardrum at a predetermined distance,
The first sensor 10 is separated from the first sensor 10 by a predetermined distance in the entrance direction of the external ear canal 90 by being installed inside the hollow of the body 100, A second sensor (20) installed and measuring the temperature;
A heating wire 30 for supplying a quantity of heat to the second sensor 20 and surrounding the body 100 around the body 100 where the second sensor 20 is located;
The inner diameter portion is connected to the body and the outer diameter portion is larger in diameter than the heat wire 30 so that the outer edge of the outer diameter portion is connected to the body, A guide portion 60 of a flexible material which is brought into close contact with an inner wall of the body to guide the insertion of the body and prevents the heat generated from the heat line from affecting the first sensor;
A cover 70 installed on the body, the cover 70 being positioned along the longitudinal direction of the body and blocking the entrance of the ear canal 90 to block the air inside the ear canal 90 and the outside air; And
And an MCU (microcircuit unit) 40 for detecting a temperature difference between the first sensor and the second sensor and supplying electricity to the hot wire,
The first sensor 10 measures the temperature of the first space in the ear canal defined by the eardrum and the inner wall of the ear canal and the guide portion,
The second sensor 20 measures the temperature of the second space in the ear canal, which is defined by the guide part, the inner wall of the ear canal and the lid,
Wherein the temperature at the moment when the temperatures of the first sensor and the second sensor become equal to each other is determined as the core body temperature.
Further comprising a controller (50) for keeping the temperature of the ear canal (90) below a threshold value of a burn.
Wherein the controller (50) is controlled by proportional control or proportional integral control.
Wherein the body (100) is located at a central portion of the guide portion (60).
Wherein the shape of the guide portion (60) is a C-shaped opening in a direction opposite to the insertion direction of the tympanic membrane temperature measuring device, and the insertion is easy to be performed with the external ear canal (90).
Wherein the lid (70) is formed of a material having a high thermal insulation property.
Characterized in that the material of the lid (70) is urethane.
Wherein the cover (70) is provided with a hole (80) for keeping the air pressure and the external pressure of the inside of the external ear canal (90) the same.
The outer periphery of the proximal end of the body 100 is formed of a male thread 105 and the lid 70 is formed with a female thread to rotate the lid 70 against the body 100, Wherein the position of the eardrum is adjustable.
Wherein the length of the tympanic membrane temperature measuring device inserted into the external ear canal 90 is shorter than the length from the entrance of the external ear canal 90 to the tympanic membrane.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20200061581A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having an air pocket |
KR20200061579A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having an air pocket |
KR20200061580A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having a protruded thermistor |
KR20210143457A (en) | 2020-05-20 | 2021-11-29 | 싱크브레인 주식회사 | Optical integrated capsule type photodynamic therapy device |
KR20210143963A (en) | 2020-05-20 | 2021-11-30 | 싱크브레인 주식회사 | Optical integrated patch-type photodynamic therapy device |
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JP2010236897A (en) * | 2009-03-30 | 2010-10-21 | Terumo Corp | Ear insertion thermometer |
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JP2002202205A (en) * | 2000-10-24 | 2002-07-19 | Terumo Corp | Deep part temperature measuring device |
JP2010236897A (en) * | 2009-03-30 | 2010-10-21 | Terumo Corp | Ear insertion thermometer |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200061581A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having an air pocket |
KR20200061579A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having an air pocket |
KR20200061580A (en) | 2018-11-26 | 2020-06-03 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature thermometer having a protruded thermistor |
WO2020111289A1 (en) | 2018-11-26 | 2020-06-04 | 재단법인 오송첨단의료산업진흥재단 | Core-body temperature measurement device having thermistor-protruding structure |
WO2020111293A1 (en) | 2018-11-26 | 2020-06-04 | 재단법인 오송첨단의료산업진흥재단 | Core body temperature measurement device having battery charging structure |
KR20210143457A (en) | 2020-05-20 | 2021-11-29 | 싱크브레인 주식회사 | Optical integrated capsule type photodynamic therapy device |
KR20210143963A (en) | 2020-05-20 | 2021-11-30 | 싱크브레인 주식회사 | Optical integrated patch-type photodynamic therapy device |
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