JPH02259572A - Instrument for measuring blood sugar value - Google Patents
Instrument for measuring blood sugar valueInfo
- Publication number
- JPH02259572A JPH02259572A JP1082877A JP8287789A JPH02259572A JP H02259572 A JPH02259572 A JP H02259572A JP 1082877 A JP1082877 A JP 1082877A JP 8287789 A JP8287789 A JP 8287789A JP H02259572 A JPH02259572 A JP H02259572A
- Authority
- JP
- Japan
- Prior art keywords
- data
- cpu
- temperature
- light
- blood sugar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000008280 blood Substances 0.000 title claims abstract description 35
- 210000004369 blood Anatomy 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000012937 correction Methods 0.000 claims abstract description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 5
- 239000008103 glucose Substances 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012790 confirmation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Landscapes
- Investigating Or Analysing Biological Materials (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、血液を付着させた試験紙の呈色反応を利用
して血糖値を測定する血糖値測定装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a blood sugar level measuring device that measures blood sugar level using the color reaction of a test paper to which blood is attached.
第３図は従来の血糖値測定装置を示す構成図であり、図
において、１は試験紙、２は試験紙１の所定の区域に付
着された血液、３は血液２に特定のピーク波長を有する
光を照射する発光ダイオード等から成る発光素子、４は
発光素子３を定電流駆動するオペアンプ、トランジスタ
等で構成された定電流回路、５は血液２の反射光を受光
するフォトダイオード等から成る受光素子、６は受光素
子５の出力電流を電圧に変換するオペアンプ等で構成さ
れた電流−電圧変換回路、７は電流−電圧変換回路６で
変換された電圧を増幅するオペアンプ等で構成された増
幅器、８は電流−電圧変換回路６と増幅器７とで構成さ
れた入力増幅部、９は入力増幅部８の出力信号をディジ
タルデータに変換するＡ／Ｄ変換器、１０はＡ／Ｄ変換
器９から得られる入力データに基づいて血ｖａ値を算出
するＣＰＵ、１１は上記入力データを血糖値に換算する
ためのデータ等が格納されたメモリ、１２は血糖値を表
示するＣＲＴ等の表示装置、１３は測定開始、停止を制
御するスイッチである。FIG. 3 is a configuration diagram showing a conventional blood glucose level measuring device. In the figure, 1 is a test strip, 2 is blood attached to a predetermined area of the test strip 1, and 3 is a block diagram showing a specific peak wavelength of the blood 2. 4 is a constant current circuit composed of an operational amplifier, a transistor, etc. that drives the light emitting element 3 at a constant current, and 5 is a photodiode that receives reflected light from the blood 2. A light receiving element, 6 is a current-voltage conversion circuit composed of an operational amplifier etc. that converts the output current of the light receiving element 5 into voltage, and 7 is composed of an operational amplifier etc. that amplifies the voltage converted by the current-voltage conversion circuit 6. An amplifier; 8 is an input amplifying section composed of a current-voltage conversion circuit 6 and an amplifier 7; 9 is an A/D converter that converts the output signal of the input amplifying section 8 into digital data; 10 is an A/D converter A CPU that calculates a blood VA value based on the input data obtained from 9, a memory 11 that stores data for converting the input data into a blood sugar level, and a display device such as a CRT that displays the blood sugar level 12 , 13 are switches for controlling the start and stop of measurement.
次に動作について説明する。Next, the operation will be explained.
スイッチ１３をＯＮにすると、ＣＰＵｌ０からスタート
信号が定電流回路４のトランジスタに送られ、このトラ
ンジスタが導通することにより、定電流回路４力５動作
する。これにより発光素子３が定電流駆動され、所定の
ピーク波長を有する光が発光して、試験紙１の血液２を
照射する。この試験紙１の呈色反応に応じた光量を有す
る反射光が受光素子５で受光され、その受光量に応じた
電流が受光素子５に流れる。この電流は入力増幅部８の
電流−電圧変換回路６で電圧に変換され、さらに増幅器
７で増幅された後、Ａ／Ｄ変換器９でディジタルデータ
に変換される。このデータはＣＰＵｌ０に入力データと
して送られる。ＣＰＵ１０は入力データに基づいてメモ
リ１１を読み出し、所定の演算処理を行うことにより血
糖値を算出する。算出された血糖値は表示装置１２で表
示される。When the switch 13 is turned on, a start signal is sent from the CPU 10 to the transistor of the constant current circuit 4, and as this transistor becomes conductive, the constant current circuit 4 operates. As a result, the light emitting element 3 is driven with a constant current, and light having a predetermined peak wavelength is emitted to irradiate the blood 2 on the test strip 1. Reflected light having an amount of light corresponding to the color reaction of the test paper 1 is received by the light receiving element 5, and a current corresponding to the amount of received light flows through the light receiving element 5. This current is converted into a voltage by the current-voltage conversion circuit 6 of the input amplifier section 8, further amplified by the amplifier 7, and then converted into digital data by the A/D converter 9. This data is sent to CPU10 as input data. The CPU 10 reads out the memory 11 based on the input data, and calculates the blood sugar level by performing predetermined arithmetic processing. The calculated blood sugar level is displayed on the display device 12.
上述した従来の血糖値測定装置では、発光素子３、受光
素子５の出力やオペアンプのオフセット電圧、その他の
回路素子等の特性が周囲温度により変化し、このため測
定された血糖値に誤差が生じる問題があった。従来は誤
差を除去するために、測定を行う毎に、標準試験紙を用
いて較正を行っていたが、非常に手間がかかるという問
題点があった。In the conventional blood sugar level measuring device described above, the output of the light emitting element 3, the light receiving element 5, the offset voltage of the operational amplifier, and the characteristics of other circuit elements change depending on the ambient temperature, which causes errors in the measured blood sugar level. There was a problem. Conventionally, in order to eliminate errors, calibration was performed using standard test paper each time a measurement was performed, but this had the problem of being very time-consuming.
この発明は上記のような問題点を解消するためになされ
たもので、周囲温度による測定誤差を自動的に補正する
ことのできる血糖値測定装置を得ることを目的としてい
る。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a blood glucose level measuring device that can automatically correct measurement errors due to ambient temperature.
この発明に係る血糖値測定装置においては、周囲温度を
測定する温度測定手段と、入力増幅部の出力信号の温度
による変化を記憶したメモリと、測定された温度と上記
メモリのデータとに基づいて入力データを補正する補正
手段とを設けている。In the blood glucose level measuring device according to the present invention, there is provided a temperature measuring means for measuring the ambient temperature, a memory storing changes due to temperature in the output signal of the input amplifying section, and a temperature measuring means for measuring the ambient temperature. A correction means for correcting input data is provided.
この発明における血糖値測定装置は、ＣＰＵの入力デー
タがメモリのデータにより補正され、この補正されたデ
ータに基づいて血糖値が算出されるので、温度変化に拘
らず、常に正確な血糖値が得られる。In the blood sugar level measuring device according to the present invention, the input data of the CPU is corrected by the data of the memory, and the blood sugar level is calculated based on this corrected data, so that an accurate blood sugar level can always be obtained regardless of temperature changes. It will be done.
以下、この発明の一実施例を図について説明する。第１
図においては第３図と対応部分には同一符号を付して説
明を省略する。１４はサーミスタ。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, parts corresponding to those in FIG. 3 are denoted by the same reference numerals, and explanations thereof will be omitted. 14 is a thermistor.
白金測温体等を用いた温度測定手段としての温度センサ
、１５は温度センサ１４の検出信号をディジタルデータ
に変換してＣＰＵｌ０に送るＡ／Ｄ変換器である。また
、メモリ１１には入力増幅部８の出力信号の温度による
変化を示す温度特性データが補正用のデータとして予め
記憶されている。A temperature sensor 15 is an A/D converter that converts the detection signal of the temperature sensor 14 into digital data and sends it to the CPU10. Furthermore, temperature characteristic data indicating changes in the output signal of the input amplifying section 8 due to temperature is stored in advance in the memory 11 as correction data.
従って、この補正用のデータは、入力増幅部８、受光素
子５および発光素子３等の各出力の温度特性を含む温度
特性のデータとなる。Therefore, this correction data is temperature characteristic data including the temperature characteristics of each output of the input amplifier 8, the light receiving element 5, the light emitting element 3, etc.
次に動作について説明する。Next, the operation will be explained.
スイッチ１３をＯＮとすると、前述と同様の動作が行わ
れて、Ａ／Ｄ変換器９から入力データがＣＰＬＪＩＯに
送られる。この入力データには温度による誤差が含まれ
ている。一方、温度センサ１４により測定された周囲温
度を示す検出信号は、Ａ／Ｄ変換器１５でディジタルの
温度測定データに変換された後、ＣＰＵｌ０に送られる
。When the switch 13 is turned on, the same operation as described above is performed and input data is sent from the A/D converter 9 to the CPLJIO. This input data includes errors due to temperature. On the other hand, a detection signal indicating the ambient temperature measured by the temperature sensor 14 is converted into digital temperature measurement data by the A/D converter 15, and then sent to the CPU10.
ＣＰＵｌ０は第２図のフローチャートに示す手順に従っ
て、上記温度測定データに基づいて入力データを補正し
、補正されたデータから血糖値を求める演算処理を行う
。The CPU 10 corrects the input data based on the temperature measurement data and performs arithmetic processing to obtain the blood sugar level from the corrected data according to the procedure shown in the flowchart of FIG.
先ず、ステップＳＴＩにより、試験紙１が装置の所定位
置に挿入されたか否かを調べ、試験紙１が挿入されない
場合はその挿入を待つ。試験紙１が正しく挿入されたら
ステップＳＴ２に進む。ステップＳＴ２では定電流回路
４にスタート信号を送って発光素子３を駆動する。次に
ステップＳＴ３でＡ／Ｄ変換器９から入力データを受け
た後、ステップＳＴ４で温度センサ１４からの温度測定
データを取り込む、そして、ステップＳＴ５において、
上記温度測定データによりメモリ１１の補正用のデータ
を読み出し、この補正用のデータにより入力データを補
正する。次にステップＳＴ６において、ステップＳＴ５
で補正されたデータに基づいて血糖値を算出し、ステッ
プＳＴ７で算出された血糖値を表示して終了する。First, in step STI, it is checked whether the test strip 1 has been inserted into a predetermined position of the apparatus, and if the test strip 1 has not been inserted, its insertion is awaited. If the test paper 1 is correctly inserted, the process advances to step ST2. In step ST2, a start signal is sent to the constant current circuit 4 to drive the light emitting element 3. Next, after receiving input data from the A/D converter 9 in step ST3, temperature measurement data from the temperature sensor 14 is taken in in step ST4, and in step ST5,
Correction data is read from the memory 11 using the temperature measurement data, and input data is corrected using this correction data. Next, in step ST6, step ST5
The blood sugar level is calculated based on the data corrected in step ST7, and the calculated blood sugar level is displayed in step ST7, and the process ends.
なお、上記実施例では血糖値測定装置について述べたが
、尿糖値等を測定する場合に適用しても同様の効果を奏
する。Although the above embodiment describes a blood sugar level measuring device, the same effect can be achieved even if the device is applied to measuring urine sugar level or the like.
この発明によれば、温度測定手段から得られる温度測定
データにより、入力増幅部から得られる入力データの補
正を補正用のデータを用いて補正するように構成したの
で、発光素子、受光素子。According to the present invention, the input data obtained from the input amplification section is corrected using the correction data based on the temperature measurement data obtained from the temperature measurement means, so that the light emitting element and the light receiving element can be corrected.
その他の回路素子を含めた温度変化による測定誤差を自
動的に除去することができ、このため、従来のように測
定値の較正作業を省略して、常に、精度の高い血糖値の
測定を行うことができ、また、ソフトウェアのみを変更
すればよ（、ハードウェアの追加、変更等を必要としな
いので、安価に実現することができる。Measurement errors caused by temperature changes, including those caused by other circuit elements, can be automatically removed, which eliminates the traditional calibration work of measured values and ensures highly accurate blood sugar level measurements at all times. In addition, it can be implemented at a low cost since it does not require any addition or modification of hardware by changing only the software.
第１図はこの発明の一実施例による血糖値測定装置を示
す構成図、第２図は同装置の動作を示すフローチャート
、第３図は従来の血糖値測定装置を示す構成図である。
１は試験紙、２は血液、３は発光素子、５は受光素子、
８は入力増幅部、１０はＣＰＵ、１１はメモリ、１４は
温度センサ。
なお、図中、同一符号は同一、又は相当部分を示す。
特許出願人 山武ハネウェル株式会社
（外２名）FIG. 1 is a block diagram showing a blood sugar level measuring device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the same device, and FIG. 3 is a block diagram showing a conventional blood glucose level measuring device. 1 is a test paper, 2 is blood, 3 is a light emitting element, 5 is a light receiving element,
8 is an input amplifier, 10 is a CPU, 11 is a memory, and 14 is a temperature sensor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant Yamatake Honeywell Co., Ltd. (2 others)
Claims (1)
験紙に照射し、その反射光を受光素子で受光し、この受
光素子の出力信号を入力増幅部を通じて得られる信号に
基づいて、血糖値を演算するようにした血糖値測定装置
において、周囲温度を特定する温度測定手段と、上記入
力増幅部の出力信号の温度特性を記憶する記憶手段と、
上記温度測定手段の測定値と上記記憶手段に記憶された
上記温度特性とに基づいて上記入力増幅部の出力信号を
補正する補正手段とを備えたことを特徴とする血糖値測
定装置。A test paper with blood attached is irradiated with a specific light output from a light-emitting element, the reflected light is received by a light-receiving element, and the blood sugar level is calculated based on the output signal of this light-receiving element and the signal obtained through the input amplifier. A blood glucose level measuring device configured to calculate the temperature, comprising: a temperature measuring means for specifying the ambient temperature; a storage means for storing the temperature characteristics of the output signal of the input amplifying section;
A blood sugar level measuring device comprising: a correction means for correcting the output signal of the input amplification section based on the measured value of the temperature measurement means and the temperature characteristic stored in the storage means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082877A JPH02259572A (en) | 1989-03-31 | 1989-03-31 | Instrument for measuring blood sugar value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082877A JPH02259572A (en) | 1989-03-31 | 1989-03-31 | Instrument for measuring blood sugar value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02259572A true JPH02259572A (en) | 1990-10-22 |
Family
ID=13786520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1082877A Pending JPH02259572A (en) | 1989-03-31 | 1989-03-31 | Instrument for measuring blood sugar value |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02259572A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10258036A (en) * | 1997-03-19 | 1998-09-29 | Matsushita Electric Ind Co Ltd | Blood-sugar meter |
| EP1484006B1 (en) * | 2003-05-07 | 2005-10-12 | Hitachi, Ltd. | Blood sugar level measuring apparatus |
| JP2007010317A (en) * | 2005-06-28 | 2007-01-18 | Gunze Ltd | Temperature sensor, measurement indicator, and blood sugar value measurement indicator |
| EP2000801A2 (en) * | 2006-03-28 | 2008-12-10 | Terumo Kabushiki Kaisha | Body fluid components measuring device |
-
1989
- 1989-03-31 JP JP1082877A patent/JPH02259572A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10258036A (en) * | 1997-03-19 | 1998-09-29 | Matsushita Electric Ind Co Ltd | Blood-sugar meter |
| EP1484006B1 (en) * | 2003-05-07 | 2005-10-12 | Hitachi, Ltd. | Blood sugar level measuring apparatus |
| JP2007010317A (en) * | 2005-06-28 | 2007-01-18 | Gunze Ltd | Temperature sensor, measurement indicator, and blood sugar value measurement indicator |
| JP4711333B2 (en) * | 2005-06-28 | 2011-06-29 | グンゼ株式会社 | Measurement display and blood glucose measurement display |
| EP2000801A2 (en) * | 2006-03-28 | 2008-12-10 | Terumo Kabushiki Kaisha | Body fluid components measuring device |
| EP2000801A4 (en) * | 2006-03-28 | 2014-06-04 | Terumo Corp | Body fluid components measuring device |
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