CN114199959A - Gas quadrupole electrochemical conditioning circuit - Google Patents
Gas quadrupole electrochemical conditioning circuit Download PDFInfo
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- CN114199959A CN114199959A CN202111443646.3A CN202111443646A CN114199959A CN 114199959 A CN114199959 A CN 114199959A CN 202111443646 A CN202111443646 A CN 202111443646A CN 114199959 A CN114199959 A CN 114199959A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
Abstract
The invention discloses a gas quadrupole electrochemical conditioning circuit, which comprises an integrated conditioning chip, an analog switch switching chip and a quadrupole electrochemical sensor, wherein the integrated conditioning chip is connected with the analog switch switching chip; the integrated conditioning chip is respectively connected with the analog switch switching chip and the quadrupole electrochemical sensor; the WE pin in the integrated conditioning chip is connected with the D pin of the analog switch switching chip; the CE pin and the RE pin of the integrated conditioning chip are respectively connected with the C pin and the S pin of the quadrupole electrochemical sensor, and the S2 pin and the S1 pin in the analog switch switching are respectively connected with the S pin and the A pin of the quadrupole electrochemical sensor. The integrated conditioning chip LMP91000 can better ensure the signal consistency of different circuit boards; the workload is reduced; meanwhile, the peripheral circuit is simple, the selection requirements of the resistor and the capacitor are low, the comprehensive cost is low, the response is faster, and the detection precision is improved.
Description
Technical Field
The invention relates to an electrochemical conditioning circuit, in particular to a gas quadrupole electrochemical conditioning circuit.
Background
The electrochemical gas sensor is a detector for measuring current by oxidizing or reducing a gas to be measured at an electrode to obtain the concentration of the gas to be measured; the conventional gas electrochemical sensor comprises a 2-pole, a 3-pole and a 4-pole, and the conventional 3-pole gas electrochemical sensor can use LMP91000 of Ti as a front-stage conditioning chip and convert a current signal generated by the electrochemical sensor into a voltage signal; the pre-stage conditioning voltage of the commonly provided 4-electrode electrochemical sensor is built by an operational amplifier and a resistor, and the circuit is relatively complex, so that the detection precision is low, the response efficiency is poor, and the cost is high.
Disclosure of Invention
The technical problem is as follows: aiming at the linear complementary problem converted from the quadratic optimization problem, a gas quadrupole electrochemical conditioning circuit is provided, and the SEN pole (namely S pin) and the AUX pole (namely A pin) of a 4-pole electrochemical sensor are switched by an analog switch to be respectively connected with a working port (WE) of an integrated conditioning chip, so that signals of the SEN pole and the AUX pole can be acquired in a time-sharing manner.
The technical scheme is as follows: in order to solve the technical problem, the invention provides a gas quadrupole electrochemical conditioning circuit, which comprises an integrated conditioning chip, an analog switch switching chip and a quadrupole electrochemical sensor; the integrated conditioning chip is respectively connected with the analog switch switching chip and the quadrupole electrochemical sensor; the WE pin in the integrated conditioning chip is connected with the D pin of the analog switch switching chip; the CE pin and the RE pin of the integrated conditioning chip are respectively connected with the C pin and the S pin of the quadrupole electrochemical sensor, and the S2 pin and the S1 pin in the analog switch switching are respectively connected with the S pin and the A pin of the quadrupole electrochemical sensor.
Further, an NC pin in the quadrupole electrochemical sensor is in idle connection.
Furthermore, a VDD pin of the analog switch switching chip is connected with the positive electrode, a GND pin is connected with 0V, and the VDD pin is connected with the GND pin through a capacitor.
Furthermore, GND, AGND, DAP and MENB pins in the integrated conditioning chip are directly connected with 0V; the pins C1 and C2 are connected through a capacitor, the pin NC is connected in an air mode, the pin VDD is connected with the anode, and the pin VDD is connected with 0V through a capacitor.
Has the advantages that: according to the gas quadrupole electrochemical conditioning circuit, the conditioning circuit built by combining the operational amplifier and the resistor has the problem of consistency, the combination error of the operational amplifier and the resistor and the capacitor on different circuits can cause that each circuit board needs to be finely adjusted, and the high-precision resistor and the resistor are expensive; the integrated conditioning chip LMP91000 is used, so that the signal consistency of different circuit boards can be better ensured; the workload is reduced; meanwhile, the peripheral circuit is simple, the selection requirements of the resistor and the capacitor are low, the comprehensive cost is low, the response is faster, and the detection precision is improved.
Drawings
FIG. 1 is an electrical schematic of the present invention;
1. integrating a conditioning chip; 2. an analog switch switching chip; 3. a quadrupole electrochemical sensor.
Detailed Description
The invention will be further described with reference to fig. 1.
A gas quadrupole electrochemical conditioning circuit comprises an integrated conditioning chip 1, an analog switch switching chip 2 and a quadrupole electrochemical sensor 3; the integrated conditioning chip 1 is respectively connected with the analog switch switching chip 2 and the quadrupole electrochemical sensor 3; the WE pin in the integrated conditioning chip 1 is connected with the D pin of the analog switch switching chip 2; the CE pin and the RE pin of the integrated conditioning chip 1 are respectively connected with the C pin and the S pin of the quadrupole electrochemical sensor 3, and the S2 pin and the S1 pin of the analog switch are respectively connected with the S pin and the A pin of the quadrupole electrochemical sensor 3.
Further in this example, the NC pin in the quadrupole electrochemical sensor 3 is air bonded.
Further in this example, the VDD pin of the analog switch switching chip 2 is connected to the positive electrode, the GND pin is connected to 0V, and the VDD pin and the GND pin are connected through a capacitor.
Further in this example, the GND, AGND, DAP, MENB pins in the integrated conditioning chip 1 are directly connected to 0V; the pins C1 and C2 are connected through a capacitor, the pin NC is connected in an air mode, the pin VDD is connected with the anode, and the pin VDD is connected with 0V through a capacitor.
Further in this example, integrated conditioning chip 1 is LMP 91000.
The foregoing is only a preferred embodiment of the invention and it should be noted that modifications and variations of the invention are possible in light of the above teachings and are to be considered within the purview of this invention.
Claims (4)
1. A gas quadrupole electrochemical conditioning circuit, characterized in that: comprises an integrated conditioning chip, an analog switch switching chip and a quadrupole electrochemical sensor; the integrated conditioning chip is respectively connected with the analog switch switching chip and the quadrupole electrochemical sensor; the WE pin in the integrated conditioning chip is connected with the D pin of the analog switch switching chip; the CE pin and the RE pin of the integrated conditioning chip are respectively connected with the C pin and the S pin of the quadrupole electrochemical sensor, and the S2 pin and the S1 pin in the analog switch switching are respectively connected with the S pin and the A pin of the quadrupole electrochemical sensor.
2. A gas quadrupole electrochemical conditioning circuit according to claim 1, wherein: and an NC pin in the quadrupole electrochemical sensor is in idle connection.
3. A gas quadrupole electrochemical conditioning circuit according to claim 1, wherein: the analog switch switches VDD pin and positive pole connection of chip, and the GND pin is connected 0V, pass through the capacitive connection between VDD pin and the GND pin.
4. A gas quadrupole electrochemical conditioning circuit according to claim 1, wherein: GND, AGND, DAP and MENB feet in the integrated conditioning chip are directly connected with 0V; the pins C1 and C2 are connected through a capacitor, the pin NC is connected in an air mode, the pin VDD is connected with the anode, and the pin VDD is connected with 0V through a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443646.3A CN114199959A (en) | 2021-11-30 | 2021-11-30 | Gas quadrupole electrochemical conditioning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443646.3A CN114199959A (en) | 2021-11-30 | 2021-11-30 | Gas quadrupole electrochemical conditioning circuit |
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| Publication Number | Publication Date |
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| CN114199959A true CN114199959A (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111443646.3A Pending CN114199959A (en) | 2021-11-30 | 2021-11-30 | Gas quadrupole electrochemical conditioning circuit |
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| CN (1) | CN114199959A (en) |
Citations (9)
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| CN102339084A (en) * | 2011-05-27 | 2012-02-01 | 中国科学院微电子研究所 | Analog front end detection circuit used for giant magneto-resistive (GMR) biosensor |
| CN202770942U (en) * | 2012-07-17 | 2013-03-06 | 深圳市赋安安全系统有限公司 | Electric-fire monitoring detector, and failure detecting circuit for residual current sensor of same |
| CN105699450A (en) * | 2016-03-07 | 2016-06-22 | 中煤科工集团重庆研究院有限公司 | Intelligent electrochemical gas sensor module |
| CN106037761A (en) * | 2016-07-12 | 2016-10-26 | 张红萍 | Closed-loop control circuit for self-treatment of snoring disease based on blood oxygen saturation measurement |
| CN205749391U (en) * | 2016-07-01 | 2016-11-30 | 临沂市安福电子有限公司 | A kind of toxic and harmful detector system |
| CN107102045A (en) * | 2017-06-15 | 2017-08-29 | 南京工业大学 | A kind of detection circuit for prussian blue film bioelectrode |
| CN107271514A (en) * | 2017-06-15 | 2017-10-20 | 南京工业大学 | It is a kind of based on detection method of the prussian blue film bioelectrode to glucose |
| CN207096162U (en) * | 2017-07-19 | 2018-03-13 | 泛测（北京）环境科技有限公司 | A kind of amplifying circuit for tiny signal for air quality electrochemical sensor |
| CN111522050A (en) * | 2020-04-14 | 2020-08-11 | 中国人民解放军军事科学院军事医学研究院 | Analog detection device for alpha surface pollution detection |
-
2021
- 2021-11-30 CN CN202111443646.3A patent/CN114199959A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN102339084A (en) * | 2011-05-27 | 2012-02-01 | 中国科学院微电子研究所 | Analog front end detection circuit used for giant magneto-resistive (GMR) biosensor |
| CN202770942U (en) * | 2012-07-17 | 2013-03-06 | 深圳市赋安安全系统有限公司 | Electric-fire monitoring detector, and failure detecting circuit for residual current sensor of same |
| CN105699450A (en) * | 2016-03-07 | 2016-06-22 | 中煤科工集团重庆研究院有限公司 | Intelligent electrochemical gas sensor module |
| CN205749391U (en) * | 2016-07-01 | 2016-11-30 | 临沂市安福电子有限公司 | A kind of toxic and harmful detector system |
| CN106037761A (en) * | 2016-07-12 | 2016-10-26 | 张红萍 | Closed-loop control circuit for self-treatment of snoring disease based on blood oxygen saturation measurement |
| CN107102045A (en) * | 2017-06-15 | 2017-08-29 | 南京工业大学 | A kind of detection circuit for prussian blue film bioelectrode |
| CN107271514A (en) * | 2017-06-15 | 2017-10-20 | 南京工业大学 | It is a kind of based on detection method of the prussian blue film bioelectrode to glucose |
| CN207096162U (en) * | 2017-07-19 | 2018-03-13 | 泛测（北京）环境科技有限公司 | A kind of amplifying circuit for tiny signal for air quality electrochemical sensor |
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Effective date of registration: 20220722 Address after: No. 8, photoelectric 1st Road, development zone, Nantong City, Jiangsu Province, 226000 Applicant after: JIANGSU HUIHUAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Applicant after: NANTONG HUIJU SOFTWARE TECHNOLOGY CO.,LTD. Address before: 226000 room 12243, building 21 (22), No. 1692, Xinghu Avenue, development zone, Nantong City, Jiangsu Province Applicant before: NANTONG HUIJU SOFTWARE TECHNOLOGY CO.,LTD. |
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