KR960003174Y1 - Digital sphygmograph - Google Patents

Digital sphygmograph Download PDF

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Publication number
KR960003174Y1
KR960003174Y1 KR2019900018629U KR900018629U KR960003174Y1 KR 960003174 Y1 KR960003174 Y1 KR 960003174Y1 KR 2019900018629 U KR2019900018629 U KR 2019900018629U KR 900018629 U KR900018629 U KR 900018629U KR 960003174 Y1 KR960003174 Y1 KR 960003174Y1
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South Korea
Prior art keywords
microcomputer
pressure
differential transformer
circuit
blood pressure
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KR2019900018629U
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Korean (ko)
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KR920008965U (en
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유완동
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대우전자 주식회사
김용원
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Priority to KR2019900018629U priority Critical patent/KR960003174Y1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021Measuring pressure in heart or blood vessels
    • A61B5/02141Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021Measuring pressure in heart or blood vessels
    • A61B5/02133Measuring pressure in heart or blood vessels by using induced vibration of the blood vessel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021Measuring pressure in heart or blood vessels
    • A61B5/022Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/74Details of notification to user or communication with user or patient ; user input means
    • A61B5/742Details of notification to user or communication with user or patient ; user input means using visual displays
    • A61B5/7445Display arrangements, e.g. multiple display units

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physiology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

내용 없음.No content.

Description

차동 트랜스를 이용한 디지탈 혈압계Digital Blood Pressure Monitor Using Differential Transformer

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 압력장치 2 : 가압부1: Pressure device 2: Pressurization part

3 : 차동트랜스 4 : 발진회로3: differential transformer 4: oscillation circuit

5 : 솔레노이드 6 : 정류기5: solenoid 6: rectifier

7, 12 : 증폭회로 8 : 홀드회로7, 12: amplification circuit 8: hold circuit

9 : A/D변환기 10 : 표시장치9: A / D converter 10: Display device

11 : 마이콤 13 : 조작키11: microcomputer 13: operation key

14 : 마이크로폰 15 : 코어14 microphone 15 core

TR : 트랜지스터TR: Transistor

본 고안은 혈압계에 관한 것으로서 특히 차동 트랜스를 이용하여 측정 혈압을 디지탈 값으로 디스플레이 되도록 한 것에 관한 것이다.The present invention relates to a sphygmomanometer, and more particularly, to a display of a measured blood pressure as a digital value using a differential transformer.

일반적으로 사용되는 혈압계는 가압부와 압력장치의 조작에 의해 맥동이 최초로 멈출 때와 압력을 해제시 처음으로 맥동이 시작되는 점을 수은주의 변화에 따라 눈금을 읽어 혈압을 측정토록 되어 있다.In general, the sphygmomanometer is used to measure blood pressure by reading the scale according to the change of mercury to indicate that the pulsation starts for the first time by the operation of the pressurizing unit and the pressure device and the pulsation starts for the first time when the pressure is released.

이러한 종래의 수은주 혈압계는 측정자가 촉감으로 맥동을 감지함에 따라 실수를 범할 수 있으며 수은주로서는 정확한 압력 표시가 어렵고 오차가 발생하기 쉬워 정확한 혈압측정이 되지 않는 문제점이 야기되었던 것이다. 따라서 본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로 압력 장치의 압력을 자동트랜스에서 전압으로 발생시키고, 맥동감지는 마이크로폰을 사용하여 진동을 감지한 후 마이콤에서 주변회로를 제어하여 측정 혈압을 수치로 디스플레이 되도록 한 차동트랜스를 이용한 디지탈 혈압계를 제공함으로써 마이콤에 의한 정밀한 혈압측정은 물론 제품을 소형화 하여 혈압계의 신뢰성 향상에 기여하고자 하는데 본 고안의 목적이 있는 것이다.Such a mercury-based blood pressure monitor may make a mistake as a measurer senses a pulsation with a tactile touch. As a result, a mercury bottle is difficult to accurately display a pressure and an error is likely to occur so that accurate blood pressure measurement cannot be made. Therefore, the present invention was devised to solve the above problems. The pressure of the pressure device is generated as a voltage in the automatic transformer, and the pulsation detection detects vibration using a microphone and then controls the peripheral circuit in the microcomputer to measure the measured blood pressure The purpose of the present invention is to provide a digital blood pressure monitor using a differential transformer to be displayed as a numerical value, to precisely measure blood pressure by the microcomputer and to improve the reliability of the blood pressure monitor by miniaturizing the product.

이하 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings as follows.

제1도에서와 같이 가압부(2)의 조작에 의해 압력장치(1)로 전달되는 압력을 압력변화에 따라 차동트랜스(3)의 코어(15)위치를 변동되게 함과 동시에 솔레노이드(5)에 공급하고 발진회로(4)에 의해 구동되는 차동트랜스(3)의 출력전압을 정류기(6)와 증폭회로(7)를 통하여 홀드회로(8)에 이가하며 이의 출력 신호는 A/D변환기(9)를 거쳐 마이콤(10)에 전송하는 한편 조작키(13)가 연결되어 있는 마이콤(11)에는 솔레노오드(5)의 구동트랜지스터(TR)와 홀드회로(8) 및 A/D변환기(9) 그리고 표시장치(10)를 각각 접속하며 맥박의 진동을 감지하는 마이크로폰(14)에는 증폭회로(12)를 거쳐 마이콤(11)에 접속하여서 된 차동트랜스를 이용한 디지탈 혈압계인 것이다.As shown in FIG. 1, the pressure delivered to the pressure device 1 by the operation of the pressurizing unit 2 changes the position of the core 15 of the differential transformer 3 according to the pressure change, and at the same time, the solenoid 5 And the output voltage of the differential transformer 3 driven by the oscillation circuit 4 are transferred to the hold circuit 8 through the rectifier 6 and the amplification circuit 7, and the output signal thereof is converted into an A / D converter ( 9) is transferred to the microcomputer 10 and the microcomputer 11 to which the operation key 13 is connected is connected to the drive transistor TR of the solenoid 5, the hold circuit 8 and the A / D converter ( 9) The microphone 14, which connects the display device 10 and senses the vibration of the pulse, is a digital blood pressure monitor using a differential transformer connected to the microcomputer 11 through an amplification circuit 12.

상기와 같은 구성으로 이루어진 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention made of the configuration as described above are as follows.

먼저 조작키(13)를 조정하여 혈압계를 조작할 수 있도록 모든 회로 및 장치에 전원을 공급하게 되는 발진회로(4)에서 출력되는 주파수에 의해 차동트랜스(3)가 동작되나 가압부(2)를 조작하지 않는 최초의 상태에서는 코어(15)가 중앙에 위치하여 차동트랜스(3) 일차축코일과 이차축코일의 권선비율이 같아지게 되어 출력 전압이 나타나지 않게 된다.First, the differential transformer 3 is operated by the frequency output from the oscillation circuit 4 which supplies power to all circuits and devices so that the manipulator can be operated by adjusting the operation key 13. In the first state of no operation, the core 15 is located at the center, and the winding ratios of the primary shaft coil and the secondary shaft coil of the differential transformer 3 are equal to each other so that the output voltage does not appear.

이러한 상태에서 마이크로폰(14)을 맥박측정 부위에 안착시키고 압력장치(1)를 팔 상단부에 감으면 맥박이 뛸 때 마다 그 진동을 마이크로폰(14)에서 감지하여 증폭회로(12)에서 일정 레벨로 증폭된 후 마이콤(11)에 공급함으로써 혈압측정 준비상태임을 인식하게 된다.In this state, when the microphone 14 is seated on the pulse measuring part and the pressure device 1 is wound around the upper arm, the vibration is sensed by the microphone 14 every time the pulse beats and amplified to a predetermined level in the amplification circuit 12. After the supply to the microcomputer 11 is recognized that the blood pressure measurement ready.

상기와 같은 상태에서 혈압을 측정하기 위하여 가압부(2)를 펌핑(PNMPING)하게 되면 압력장치(1)에 공기가 유입되어 팔 상부에 압력을 가하게 된다.When the pressurizing unit 2 is pumped to measure blood pressure in the above state, air is introduced into the pressure device 1 to apply pressure to the upper part of the arm.

이때 압력장치(1)에 압력이 증가하면 차동트랜스(3)의 코어(15) 위치가 변화됨으로서 권선비율이 달라져 이에 해당되는 전압차가 발생되며 상기 전압은 정류기(6)에서 DC전압으로 변화되고 또한 증폭회로(7)에 의해 일정레벨로 증폭이 이루어져 홀드회로(8)를 통해 A/D변환기(9)로 전송되어져 아날로그 신호가 디지탈 값으로 변화된 후 마이콤(11)에 계속 읽어 들어 표시장치(10)에 디스플레이되는 수치를 계속 상승시키게 된다.At this time, if the pressure increases in the pressure device 1, the position of the core 15 of the differential transformer 3 is changed, and thus the winding ratio is changed to generate a voltage difference corresponding thereto, and the voltage is changed from the rectifier 6 to a DC voltage. The amplification circuit 7 is amplified to a predetermined level and transmitted to the A / D converter 9 through the hold circuit 8 so that the analog signal is converted into a digital value, and then continuously read into the microcomputer 11 and the display device 10 Will continue to increase.

이때 압력장치(1)의 압력이 증가하여 맥박이 최초로 중지되면 마이크로폰(14)은 진동을 감지하지 못함에 따라 증폭회로(12)에서는 마이콤(11)에 신호를 전송시키지 않게 된다.In this case, when the pressure of the pressure device 1 increases and the pulse is first stopped, the microphone 14 does not detect the vibration and thus the amplification circuit 12 does not transmit a signal to the microcomputer 11.

그러므로 마이콤(11)은 최초 맥박 중지 상태를 인식하여 홀드회로(8)에 일정 시간동안 신호를 보내어 그때의 값을 홀딩시키면 A/D변환기(9)의 디지탈 출력값 즉 맥박이 최초로 중지될 때의 압력이 마이콤(11)의 연산에 의해 표시장치(10)에 디스플레이되는 한편 일정시간 완료 후 홀드회로(8)로 인가되는 홀딩신호를 해제함과 동시에 트랜지스터(TR) 베이스로 신호를 보내어 상기 트랜지스터(TR)가 도통상태가 되어 솔레노이드(5)를 동작시킴으로서 압력장치(1)에 공기가 배출되어 압력을 해제시킨다.Therefore, when the microcomputer 11 recognizes the initial pulse stop state and sends a signal to the hold circuit 8 for a predetermined time and holds the value at that time, the digital output value of the A / D converter 9, that is, the pressure when the pulse is first stopped. The display device 10 is displayed on the display device 10 by the operation of the microcomputer 11, releases the holding signal applied to the holding circuit 8 after completion of a predetermined time, and simultaneously sends a signal to the transistor TR to transmit the signal to the transistor TR. ) Is in a conductive state and the solenoid 5 is operated to release air to the pressure device 1 to release the pressure.

이때 차동트랜스(3)의 출력전압은 코어(15) 위치가 변화되어 출력전압이 감소된다.At this time, the output voltage of the differential transformer 3 changes the position of the core 15 so that the output voltage is reduced.

따라서 압력이 서서히 해제되어 맥박이 최초로 뛸 때 마이크로폰(14)에서 이의 진동을 감지하고 상기 신호가 증폭회로(12)를 통해 마이콤(11)에 인가되면 맥박이 최초로 박동됨을 인식하여 홀드회로(8)에 다시 홀딩신호를 인가함에 따라 그때의 전압을 A/D변환기(9)에서 디지탈 신호로 변환 후 마이콤(11)으로 전송되며 이를 연산하여 표시장치(10)에 맥박이 최초 진동할 때의 압력이 수치로 디스플레이 되는 것이다.Therefore, when the pressure is released slowly and the pulse is running for the first time, the microphone 14 detects its vibration, and when the signal is applied to the microcomputer 11 through the amplification circuit 12, the pulse is recognized for the first time and the hold circuit 8 As the holding signal is again applied to the digital signal, the voltage is converted from the A / D converter 9 to the digital signal and then transferred to the microcomputer 11, and the pressure when the pulse is first vibrated in the display device 10 is calculated. It is displayed numerically.

한편 재측정을 필요로 하는 경우 조작키(13)의 리셋버튼을 조정하면 마이콤(11)에서 트랜지스터(TR)의 구동신호 차단 및 표시장치(10)와 홀드회로(8)를 초기화시켜 다음 측정의 대기 상태에 있게 된다.On the other hand, when re-measurement is required, the reset button of the operation key 13 is adjusted, and the microcomputer 11 resets the drive signal of the transistor TR and initializes the display device 10 and the hold circuit 8 to perform the next measurement. You are in a waiting state.

이상에서 상술한 바와 같이 작용하는 본 고안은 차동트랜스(3)와 마이크로폰(14) 및 마이콤(11)과 주변회로에 의해 구동되는 차동트랜스를 이용한 디지탈 혈압계를 제공함으로써 정밀한 혈압측정은 물론 제품을 소형화시킬 수 있어 혈압계의 신뢰성 향상에 크게 기여할 수 있는 고안인 것이다.The present invention, which works as described above, provides a digital blood pressure monitor using a differential transformer (3), a microphone (14), a microcomputer (11), and a differential transformer driven by a peripheral circuit, thereby miniaturizing the product as well as precise blood pressure measurement. It is designed to be able to greatly contribute to improving the reliability of the blood pressure monitor.

Claims (1)

가압부(2)의 조작에 의해 압력장치(1)로 전달되는 압력을 압력변화에 따라 차동트랜스(3)의 코어(15) 위치를 변동되게 함과 동시에 솔레노이드(5)에 공급하고 발진회로(4)에 의해 구동되는 차동트랜스(3)의 출력전압을 정류기(6)와 증폭회로(7)을 통하여 홀드회로(8)에 인가하여 이의 출력신호는 A/D변환기(9)를 거쳐 마이콤(11)에 전송하는 한편 조작키(13)가 연결되어 있는 마이콤(11)에는 솔레노이드(5)의 구동 트랜지스터(TR)와 홀드회로(8) 및 A/D변환기(9) 그리고 표시장치(10)를 각각 접속하며 맥박의 진동을 감지하는 하이크로폰(14)에는 증폭회로(12)를 거쳐 마이콤(11)에 접속하여서 된 것을 특징으로 하는 차동 트랜스를 이용한 디지탈 혈압계.The pressure delivered to the pressure device 1 by the operation of the pressurizing unit 2 changes the position of the core 15 of the differential transformer 3 according to the pressure change, and is supplied to the solenoid 5 and the oscillation circuit ( 4) The output voltage of the differential transformer 3 driven by 4) is applied to the hold circuit 8 through the rectifier 6 and the amplification circuit 7 so that its output signal is passed through the A / D converter 9 and the microcomputer ( 11 to the microcomputer 11 to which the operation key 13 is connected, the drive transistor TR of the solenoid 5, the hold circuit 8, the A / D converter 9, and the display device 10; A digital blood pressure monitor using a differential transformer, characterized in that connected to the microcomputer 11 through the amplification circuit 12 to the high microphone 14 for detecting the vibration of the pulse, respectively.
KR2019900018629U 1990-11-30 1990-11-30 Digital sphygmograph KR960003174Y1 (en)

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KR2019900018629U KR960003174Y1 (en) 1990-11-30 1990-11-30 Digital sphygmograph

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Application Number Priority Date Filing Date Title
KR2019900018629U KR960003174Y1 (en) 1990-11-30 1990-11-30 Digital sphygmograph

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KR920008965U KR920008965U (en) 1992-06-16
KR960003174Y1 true KR960003174Y1 (en) 1996-04-17

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