KR19980081942A - Semiconductor Sensor Breathalyzer - Google Patents
Semiconductor Sensor Breathalyzer Download PDFInfo
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- KR19980081942A KR19980081942A KR1019980032025A KR19980032025A KR19980081942A KR 19980081942 A KR19980081942 A KR 19980081942A KR 1019980032025 A KR1019980032025 A KR 1019980032025A KR 19980032025 A KR19980032025 A KR 19980032025A KR 19980081942 A KR19980081942 A KR 19980081942A
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- G—PHYSICS
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath
- G01N33/4972—Determining alcohol content
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Abstract
본 발명은 음주측정기 특히 반도체센서를 장착한 음주측정기의 마우스피스에 날숨을 불어 혈중알코올농도량(BAC)을 측정하는 것에 관계한다. 좀더 구체적으로, 본발명은 날숨의 세기와 무관하게 일정량의 날숨만 센서에 흡착되는 특수한 구조의 마우스피스와, 센서가 전압차를 측정하면 이값을 혈중알코올농도량으로 변환시켜 BAC(%)를 계산할 수 있는 특수한 BAC 변환식을 입력한 반도체칩을 장착하여 정확하고 일관성있는 측정결과를 얻을 수 있도록한 개선된 음주측정기를 제공하는 것이다.The present invention relates to measuring blood alcohol concentration (BAC) by blowing a breath on the mouthpiece of a breathalyzer, particularly a breathalyzer equipped with a semiconductor sensor. More specifically, the present invention is a mouthpiece of a special structure in which only a certain amount of exhalation is adsorbed to the sensor irrespective of the intensity of exhalation, and when the sensor measures the voltage difference, it converts this value into the blood alcohol concentration to calculate BAC (%). It is to provide an improved breathalyzer that is equipped with a semiconductor chip inputting a special BAC conversion formula to obtain accurate and consistent measurement results.
Description
본 발명은 음주측정기(Breath Alcohol Tester)의 정확성과 신뢰성을 높이기위한 특수한 구조의 마우스피스와 여기에 이용되는 혈중알코올농도 변환식에 관계한다.The present invention relates to a mouthpiece of a special structure for improving the accuracy and reliability of the Breath Alcohol Tester and the blood alcohol concentration conversion formula used therein.
종래의 음주측정기는 음주운전자 단속에 널리 사용되어온 전지센서형(fuel cell)음주측정기와 반도체센서형 측정기가 있다. 특히 반도체센서형 음주측정기는 날숨중 알코올가스와 혈중알코올농도 간의 상관관계를 밝혀 이를 공식화하여 반도체칩에 이를 입력시켜 사용하는 것이다.The conventional breathalyzer has a battery cell type (fuel cell) alcohol meter and a semiconductor sensor type meter which has been widely used for drunk driver crackdown. In particular, semiconductor sensor type breathalyzer finds a correlation between alcohol gas and blood alcohol concentration during exhalation, formulates it, and inputs it to a semiconductor chip.
즉, 기존의 반도체센서형 음주측정기는 사람의 날숨이 들어가 알코올 측정센서에 흡착되면, 센서에서 측정된 전압값이 특정한 BAC(Blood Alcohol Concentration) 변환식에 따라 BAC값으로 변환되는 메카니즘으로 되어있다.That is, the conventional semiconductor sensor type breathalyzer is a mechanism that converts the voltage value measured by the sensor into a BAC value according to a specific BAC (Blood Alcohol Concentration) conversion formula when a person's exhalation enters the alcohol measuring sensor.
한편 음주측정기의 부품인 마우스피스는 날숨이 들어가는 통로 중간에 횡경막이 설치되어 있어 이것이 날숨의 양을 줄이는 역할을 한다. 그러나 날숨의 세기에 따라 센서에 인입되는 날숨의 양이 달라지는 단점이 있다.Meanwhile, the mouthpiece, a part of the breathalyzer, has a diaphragm installed in the middle of the passage through which exhalation plays a role in reducing the amount of exhalation. However, there is a disadvantage in that the amount of exhalation introduced into the sensor varies according to the intensity of the exhalation.
또한 구조에 있어서 센서에 너무많은 양의 날숨이 흡착되어 알코올 잔류가스가 센서와 그 주변에 남아서 연속측정시 정확성과 신뢰도가 떨어지는 단점이 있었다.In addition, in the structure, too much exhalation is adsorbed on the sensor, and alcohol residual gas remains in the sensor and its surroundings, resulting in a decrease in accuracy and reliability in continuous measurement.
또다른 문제점은, 날숨 인입이 종료한후 마우스피스의 습기가 외부로 빠져나가지 못하므로 마우스피스 내에 알코올 잔류가스가 남아있게되어 측정시 오류발행의 가능성이 매우 높다는 것이다. 특히 알코올농도가 낮을 때는 비교적 정확한 값을 나타내나 고농도에서는 정확도가 떨어진다.Another problem is that since the moisture of the mouthpiece does not escape to the outside after the expiration of the breath, the alcohol residue gas remains in the mouthpiece, so that the possibility of error is very high in measurement. In particular, when alcohol concentration is low, it shows relatively accurate value, but at high concentration, it is inaccurate.
그밖에, 마우스피스를 통하여 기기내로 인입된 습한공기가 외부로 빠져나가지 못하고 기기내에 상당량이 그대로 남아있기 때문에 기기에 손상을 가할 가능성이 상존하므로 측정결과의 신뢰성이 저하되는 문제점도 있었다.In addition, since the humid air introduced into the device through the mouthpiece does not escape to the outside and a considerable amount remains in the device, there is a possibility that damage to the device may exist and thus the reliability of the measurement result may be deteriorated.
위와 같은 문제점들을 해결하기 위해 본 발명자는 음주측정기의 정확성과 신뢰성을 높이기 위해 마우스피스의 구조를 개선하였다.In order to solve the above problems, the present inventors have improved the structure of the mouthpiece to increase the accuracy and reliability of the breathalyzer.
따라서, 본 발명의 중요한 목적 중 하나는 마우스피스의 구조를 개선하여 사람의 날숨이 일정량만 센서에 도달하므로써 음주측정시 정확도와 신뢰성을 높이는 것이다.Therefore, one of the important objects of the present invention is to improve the structure of the mouthpiece to increase the accuracy and reliability when measuring the breath by only a certain amount of exhalation of the person reaches the sensor.
또다른 목적은, 날숨중의 알코올 성분과 반응하는 센서에 흐르는 전류 및 저항값을 전기회로에 전달하는 데 있어서, 전류 및 저항값에 상응한 혈중알코올농도를 저농도 뿐만아니라 고농도일때도 정확하고 일관성있게 표시할 수 있도록, 센서의 전압차를 특수한 BAC변환식에 따라 정확한 BAC값으로 변환시킬 수 있는 메카니즘이 적용되어 우수한 성능을 나타내는 음주측정기를 제공하는 것이다.Another purpose is to deliver the current and resistance values flowing through the sensor reacting with the alcohol component in the exhalation circuit to the electrical circuit, which accurately and consistently maintains the blood alcohol concentration corresponding to the current and resistance values as well as at low concentrations. In order to display, a mechanism that can convert the voltage difference of the sensor to the correct BAC value according to a special BAC conversion formula is applied to provide a breathalyzer with excellent performance.
도 1은 현재 사용되고 있는 음주측정기의 마우스피스 구조를 간략하게 나타 낸 도면이다.1 is a view showing a simplified structure of the mouthpiece of the breathalyzer currently being used.
도 2는 본 발명의 마우스피스를 나타내는 평면도와 부분단면도.2 is a plan view and a partial cross-sectional view showing a mouthpiece of the present invention.
도 3는 본 발명의 마우스피스의 부품별 단면을 개략적으로 나타낸 단면도와 정면도.Figure 3 is a cross-sectional view and front view schematically showing the cross-section of each part of the mouthpiece of the present invention.
도 4와 5는 저항값 2.5Kohm 에서 측정시간이 각각 3, 4, 5 및 8초일 때의 BAC% 와 전압차 간의 관계를 보여주는 그래프이다.4 and 5 are graphs showing the relationship between the BAC% and the voltage difference when the measurement time is 3, 4, 5 and 8 seconds at the resistance value of 2.5Kohm.
도 6과 7은 저항값 5Kohm 에서 측정시간이 각각 3, 4, 5 및 8초일 때의 BAC% 와 전압차 간의 관계를 보여주는 그래프이다.6 and 7 are graphs showing the relationship between the BAC% and the voltage difference when the measurement time is 3, 4, 5 and 8 seconds at the resistance value of 5Kohm.
본 발명은 상기의 목적을 달성하기 위해 마우스피스의 구조를 개선하고 또한 기존의 BAC 변환식보다 더욱 정확한 결과를 얻을 수 있도록한 특수한 BAC변환식을 입력한 반도체칩을 장착한 새로운 음주측정기를 제공한다.The present invention provides a new breathalyzer equipped with a semiconductor chip inputting a special BAC conversion formula to improve the structure of the mouthpiece and achieve more accurate results than the existing BAC conversion formula to achieve the above object.
도1에서 현재 사용되고 있는 공지된 반도체센서형 음주측정기의 부품인 마우스피스의 구조를 간략하게 나타내었다. 도면을 참조하면, 날숨이 들어가는 통로에 설치된 횡경막(a)이 날숨의 양을 줄이는 역할을 하나 날숨세기에 따라 센서에 인입되는 양이 달라진다.In FIG. 1, the structure of a mouthpiece, which is a part of a known semiconductor sensor type breathalyzer, is briefly shown. Referring to the drawings, the diaphragm (a) installed in the passage through which exhalation plays a role of reducing the amount of exhalation, but the amount introduced into the sensor depends on the exhalation intensity.
도2는 본 발명의 마우스피스를 나타내는 평면도와 부분단면도이며 도4는 마우스피스의 부품별 단면을 개략적으로 나타낸 도면이다. 본 발명의 마우스피스의 구조를 좀더 상세히 설명하기 위하여 도2를 참조하여 날숨의 진행순서를 나타내면 다음과 같다:2 is a plan view and a partial cross-sectional view showing a mouthpiece of the present invention, Figure 4 is a schematic view showing a cross-section of each part of the mouthpiece. In order to explain the structure of the mouthpiece of the present invention in more detail with reference to Figure 2 showing the sequence of exhalation as follows:
1) 먼저 날숨이 (1)의 방향으로 들어가면 (a)의 구멍을 통해 밖으로 배출되고 나머지 일부가 (2)의 방향으로 들어간다.1) First, exhalation enters the direction of (1), it is discharged out through the hole of (a), and the other part enters the direction of (2).
2) (2)의 방향으로 흡입된 공기는 (b)의 횡경막에 부딪혀 (c)의 원추형 구조물의 화살표 방향을 통해 일부가 기기 바깥으로 배출되고 나머지가 (3)의 방향으로 들어간다.2) The air sucked in the direction of (2) hits the diaphragm of (b) and partly out of the machine through the direction of the arrow of the conical structure of (c) and the remainder enters in the direction of (3).
3) (3)의 방향으로 들어온 공기는 0.5mm의 구멍을 통과하여 센서에 도달하고 여기서 반응하게된다.3) Air entering in the direction of (3) passes through a hole of 0.5 mm to reach the sensor and react here.
4) 센서에 도달한 날숨이 있는 장소의 압력과 공기흐름으로 발생하는 기기 바깥의 압력차이 때문에 센서에 도달한 공기가 역류하는 현상을 방지하기 위해 (d)의 보호막을 설치한다.4) Install the protective film of (d) to prevent backflow of the air reaching the sensor due to the pressure difference between the exhaled place reaching the sensor and the pressure difference outside the equipment caused by the airflow.
위와 같은 마우스피스의 구조에 의하여, 날숨이 마우스피스의 다양한 구조물을 거치는 동안 일정량의 날숨만 센서에 흡착하게 된다. 또한 연속적으로 날숨을 측정하더라도 (a),(c)를 통하여 공기의 대부분이 기기밖으로 배출되기 때문에 잔류공기가 남아있지 않게되어 정확한 측정치를 얻을 수 있다.By the structure of the mouthpiece as described above, while the exhalation passes through the various structures of the mouthpiece, only a certain amount of exhalation is adsorbed to the sensor. In addition, even if the exhalation is continuously measured, most of the air is discharged out of the device through (a) and (c), so that no residual air remains.
한편, 본발명의 특수한 혈중알코올농도(BAC) 변환식은 수회의 실험에서 얻은 결과데이타를 근거로 작성된 것이며 그 단계는 다음과 같다:On the other hand, the special BAC conversion formula of the present invention is based on the data obtained from several experiments, and the steps are as follows:
제1단계: 측정된 전압값(아날로그 신호)을 ADC(analog-digital converter:아날로그-디지털 변환기)에 의해 16진수값으로 변환하고 이값을 y 로 설정한다.Step 1: The measured voltage value (analog signal) is converted into a hexadecimal value by an analog-digital converter (ADC) and set to y.
제2단계: 변환값 y 에서 역시 16진수값인 5를 빼고 이값을 x 로 설정한다. (상기의 상수값 5 대신 센서의 특성에 따라 각기다른 실험결과의 상수값을 쓸 수 있다) 즉, x = y - 5 (16진수값)Step 2: Subtract 5, also the hexadecimal value, from the converted value y and set it to x. (Instead of the above constant value 5, you can use the constant value of different experimental results according to the characteristics of the sensor.) That is, x = y-5 (hexadecimal value)
제3단계: 다음 세가지 경우(저농도에서 고농도 순서)에 따라 각각 BAC%를 계산한다.Step 3: Calculate BAC% for each of the following three cases (low to high concentration):
(가) 만일 x 2F (16진수값)이면,(A) if x 2F (hexadecimal),
BAC% = 0 (16진수값)BAC% = 0 (hexadecimal value)
(나) 만일 30 x 89 (16진수값)이면,(B) if 30 x 89 (hexadecimal),
BAC% = 2(0.8x' - 36) (10진수값)BAC% = 2 (0.8x '-36) (decimal value)
(다) 만일 90 x (16진수값)이면,(C) if 90 x (hexadecimal),
BAC% = 4.2(0.8x' - 70) (10진수값)BAC% = 4.2 (0.8x '-70) (decimal value)
상기의 3가지 식은 실험결과 데이터를 기준하여 그래프상에서 기울기(slope)을 구하여 얻은 변환식들이다.The above three equations are conversion equations obtained by obtaining a slope on a graph based on the experimental result data.
(실시예)(Example)
하기의 표1 및 2는 본 발명의 BAC% 와 전압차의 대응관계를 밝히고 변환식을 구하기 위해 실험한 결과로 나온 데이터이며, 표1은 저항값이 2.5Kohm 일 경우의 결과이고 표2는 저항값이 5Kohm 일 경우의 결과이다. 각 실험은 측정시간을 3, 4, 5 및 8초로 했고 A, B, C, D, E, F, G, H, I 및 J 의 10가지 센서를 대상으로 전압차를 측정하여 평균값을 구했다. 도4 내지 7에서 전압차와 BAC% 의 관계를 표시하고 평균값을 연결하여 그래프를 얻었으며 이 그래프에서 구한 기울기(slope)에 기초하여 본 발명의 특수한 BAC 변환식을 정의하였다.Tables 1 and 2 below are the results of experiments to find the corresponding relationship between the BAC% and the voltage difference of the present invention and obtain a conversion equation, Table 1 is the result when the resistance value is 2.5Kohm and Table 2 is the resistance value This is the result when 5Kohm. In each experiment, the measurement time was 3, 4, 5, and 8 seconds, and the average value was obtained by measuring the voltage difference with 10 sensors of A, B, C, D, E, F, G, H, I, and J. 4 to 7 show the relationship between the voltage difference and BAC% and connect the average values to obtain a graph, and based on the slopes obtained from this graph, a special BAC conversion equation of the present invention was defined.
본 발명의 독특한 마우스피스 구조물을 이용하여 혈중알코올농도가 낮은경우 및 높은경우를 대상으로 상기와 같은 실험데이터를 얻었고, 이 데이터를 근거로 특수한 BAC 변환식을 산출하였으며 이에 따라 저농도 및 고농도에서 모두 정확한 결과를 얻을 수 있었다.Using the unique mouthpiece structure of the present invention, the experimental data as described above were obtained for low and high blood alcohol concentrations, and based on this data, a special BAC conversion equation was calculated. Thus, accurate results at both low and high concentrations were obtained. Could get
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KR1019980032025A KR19980081942A (en) | 1998-08-06 | 1998-08-06 | Semiconductor Sensor Breathalyzer |
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KR (1) | KR19980081942A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100431798B1 (en) * | 2002-06-17 | 2004-05-17 | 안상희 | Mouth piece for the alcohol meter |
KR100518039B1 (en) * | 2001-12-03 | 2005-09-28 | 주식회사 맥사이언스 | Determination of taste and aroma using multiple array sensors |
WO2009006637A3 (en) * | 2007-07-05 | 2009-03-12 | Alcotek Inc | Mouth alcohol tester |
KR102030278B1 (en) | 2018-06-07 | 2019-10-10 | (주)센텍코리아 | Breath alcohol analyzer for low range concentration |
KR20220139486A (en) | 2021-04-07 | 2022-10-17 | (주)센텍코리아 | Breath alcohol analyzer |
-
1998
- 1998-08-06 KR KR1019980032025A patent/KR19980081942A/en not_active Application Discontinuation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100518039B1 (en) * | 2001-12-03 | 2005-09-28 | 주식회사 맥사이언스 | Determination of taste and aroma using multiple array sensors |
KR100431798B1 (en) * | 2002-06-17 | 2004-05-17 | 안상희 | Mouth piece for the alcohol meter |
WO2009006637A3 (en) * | 2007-07-05 | 2009-03-12 | Alcotek Inc | Mouth alcohol tester |
US8161793B2 (en) | 2007-07-05 | 2012-04-24 | Alcotek, Inc. | Mouth alcohol tester |
US8756974B2 (en) | 2007-07-05 | 2014-06-24 | Alcotek, Inc. | Mouth alcohol tester |
KR102030278B1 (en) | 2018-06-07 | 2019-10-10 | (주)센텍코리아 | Breath alcohol analyzer for low range concentration |
KR20220139486A (en) | 2021-04-07 | 2022-10-17 | (주)센텍코리아 | Breath alcohol analyzer |
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