JP2007315913A - 水質計 - Google Patents
水質計 Download PDFInfo
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- JP2007315913A JP2007315913A JP2006145801A JP2006145801A JP2007315913A JP 2007315913 A JP2007315913 A JP 2007315913A JP 2006145801 A JP2006145801 A JP 2006145801A JP 2006145801 A JP2006145801 A JP 2006145801A JP 2007315913 A JP2007315913 A JP 2007315913A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 239000011521 glass Substances 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 78
- 238000001139 pH measurement Methods 0.000 claims description 20
- 238000011088 calibration curve Methods 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 150000002739 metals Chemical class 0.000 claims description 8
- 230000033116 oxidation-reduction process Effects 0.000 claims description 7
- 230000000052 comparative effect Effects 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 22
- 239000000460 chlorine Substances 0.000 description 22
- 229910052801 chlorine Inorganic materials 0.000 description 22
- 239000000523 sample Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 7
- 238000009499 grossing Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 101100524516 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RFA2 gene Proteins 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
【解決手段】水質計の接続端子t1,t2には、測定対象の液に浸けると不純物濃度に応じた起電圧を発生する濃度測定用電極1a,1bが接続される。接続端子t3,t4には、ガラス電極法によりpHを検出する一対のpH測定用電極2a,2b、又は、ORPに応じた起電圧を発生するORP測定用電極3a,3bの何れかが接続され、一方の端子t3と低圧側の端子t1の間には10MΩ程度の高抵抗の抵抗R17を接続してある。差動増幅回路4は接続端子t1,t2の差電圧を増幅する。バイアス回路8は接続端子t3に一定のバイアス電圧を印加する。信号処理部6は、差動増幅回路4の出力とメモリ6cに予め記憶された検量線データとに基づいて不純物濃度を求めるとともに、接続端子t4の電圧からバイアス電圧を減算した電圧と検量線データとに基づいてpH或いはORPを求める。
【選択図】図1
Description
2a,2b pH測定用電極
3a,3b ORP測定用電極
4 差動増幅回路
6 信号処理部
6c メモリ
8 バイアス回路
R17 抵抗
t1〜t4 接続端子
Claims (1)
- 互いに異なる金属で形成された一対の濃度測定用電極を有し、両濃度測定用電極を測定液に浸漬すると、測定液に含まれる測定対象の不純物濃度に応じた大きさの起電圧を両濃度測定用電極間に発生する濃度センサと、
ガラス電極法によりpHを検出するための一対のpH測定用電極を有し、ガラス薄膜の両面を測定液とpHが既知の比較溶液とに接触させるとともに、一方のpH測定用電極を測定液に、他方のpH測定用電極を比較溶液に浸漬すると、測定液のpH値に応じた電圧を両電極間に発生するpHセンサと、
互いに異なる金属で形成された一対のORP測定用電極を有し、両ORP測定用電極を測定液に浸漬すると、測定液の酸化還元電位に応じた大きさの起電圧を両ORP測定用電極間に発生するORPセンサと、
一対の濃度測定用電極がそれぞれ接続される第1及び第2の接続端子と、
一対のpH測定用電極又は一対のORP測定用電極の何れかが選択的に接続される第3及び第4の接続端子と、
第1の接続端子の電圧と第2の接続端子の電圧との差電圧を増幅する差動増幅回路と、
第3及び第4の接続端子の内の一方に、一定のバイアス電圧を印加するバイアス回路と、
一対の濃度測定用電極間に発生する起電圧と不純物濃度との関係、一対のpH測定用電極間に発生する電圧とpHとの関係、一対のORP測定用電極間に発生する起電圧とORPとの関係をそれぞれ示した検量線データを記憶するメモリと、
差動増幅回路の出力と検量線データとに基づいて不純物濃度を求めるとともに、第3及び第4の接続端子の内の他方の電圧からバイアス電圧を減算した電圧と検量線データとに基づいてpH又は酸化還元電位の何れかを求める測定回路とを備え、
第3及び第4の接続端子の内の一方の接続端子と、第1及び第2の接続端子の内で低圧側となる接続端子との間を、抵抗値が10MΩ以上且つ100MΩ以下のインピーダンス要素を介して電気的に接続したことを特徴とする水質計。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2006145801A JP4881068B2 (ja) | 2006-05-25 | 2006-05-25 | 水質計 |
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JP2006145801A JP4881068B2 (ja) | 2006-05-25 | 2006-05-25 | 水質計 |
Publications (2)
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JP2007315913A true JP2007315913A (ja) | 2007-12-06 |
JP4881068B2 JP4881068B2 (ja) | 2012-02-22 |
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JP2006145801A Active JP4881068B2 (ja) | 2006-05-25 | 2006-05-25 | 水質計 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101115694B1 (ko) | 2009-01-19 | 2012-03-06 | 경북대학교 산학협력단 | 유리 pH 센서를 이용한 pH 측정 시스템 |
CN113933351A (zh) * | 2021-09-30 | 2022-01-14 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | 矿浆pH值检测方法、装置及计算机可读存储介质 |
WO2022027615A1 (zh) * | 2020-08-05 | 2022-02-10 | 海德星科技南京有限公司 | 一种基于河流水质自动监测系统的信号处理电路及处理方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62288562A (ja) * | 1986-06-09 | 1987-12-15 | Hitachi Ltd | 水質マルチセンサ |
JPH0688803A (ja) * | 1992-09-07 | 1994-03-29 | Dkk Corp | 電極式イオン濃度計 |
WO2005047880A1 (ja) * | 2003-11-14 | 2005-05-26 | Tanita Corporation | 水質計 |
-
2006
- 2006-05-25 JP JP2006145801A patent/JP4881068B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62288562A (ja) * | 1986-06-09 | 1987-12-15 | Hitachi Ltd | 水質マルチセンサ |
JPH0688803A (ja) * | 1992-09-07 | 1994-03-29 | Dkk Corp | 電極式イオン濃度計 |
WO2005047880A1 (ja) * | 2003-11-14 | 2005-05-26 | Tanita Corporation | 水質計 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101115694B1 (ko) | 2009-01-19 | 2012-03-06 | 경북대학교 산학협력단 | 유리 pH 센서를 이용한 pH 측정 시스템 |
WO2022027615A1 (zh) * | 2020-08-05 | 2022-02-10 | 海德星科技南京有限公司 | 一种基于河流水质自动监测系统的信号处理电路及处理方法 |
CN113933351A (zh) * | 2021-09-30 | 2022-01-14 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | 矿浆pH值检测方法、装置及计算机可读存储介质 |
CN113933351B (zh) * | 2021-09-30 | 2023-12-22 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | 矿浆pH值检测方法、装置及计算机可读存储介质 |
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