CN105067767A - Operational amplifier circuit for collecting concentration of hazardous chemical substances (combustible gas or liquid) - Google Patents
Operational amplifier circuit for collecting concentration of hazardous chemical substances (combustible gas or liquid) Download PDFInfo
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- CN105067767A CN105067767A CN201510457496.XA CN201510457496A CN105067767A CN 105067767 A CN105067767 A CN 105067767A CN 201510457496 A CN201510457496 A CN 201510457496A CN 105067767 A CN105067767 A CN 105067767A
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- sensor
- operational amplifier
- amplifier circuit
- circuit
- detect
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Abstract
The invention discloses an operational amplifier circuit for collecting the concentration of hazardous chemical substances (combustible gas or liquid) and relates to the technical field of safety monitoring. The operational amplifier circuit comprises an alcohol sensor MQ3, a natural gas sensor MQ5, a sulfur dioxide sensor MQ136, an ammonia gas sensor MQ137, and the model of the signal amplifying chip used in the circuit is AD8572. The provided operation amplifier circuit can detect the concentration of different combustible gas and liquids by changing the sensors.
Description
Technical field
The present invention relates to safety monitoring technology field, be specifically related to a kind of operational amplification circuit gathering harmful influence inflammable gas or strength of fluid.
Background technology
Along with China's rapid development of economy, freight traffic increases year by year, wherein the freight traffic of dangerous material also presents ever-increasing trend, dangerous material are all generally the raw material of industry or product, there is inflammable, blast, burn into poisons and the character such as radioactivity, in handling, store, very easily cause personal injury and property loss accident, therefore relatively common logistics in transportation, dangerous-article physical-distribution more needs comprehensively, accurately, reliable information management and control.
The danger of dangerous material goods depends primarily on physicochemical property and the external environmental condition of dangerous cargo itself, when they be subject to that loading in mixture of (collision, friction, heat, fire, the water) impact of certain external condition or character objectionable intermingling material and improper ventilation, accumulated heat are loose, packages in damaged condition etc., often cause serious accident, therefore will carry out Real-Time Monitoring to the state of dangerous material.Need to consider following factor according to the self property of dangerous material: first the change of temperature, humidity all can have an impact to the character of most of dangerous material and danger, and the accident such as the leakage of some liquids and gases dangerous goods can cause burning, blast and human body is poisoning, and these accidents are also common in hazardous materials transportation process, so using the concentration of temperature, pressure, smog and inflammable gas and liquid (as alcohol, sulfide) etc. as necessary monitoring parameter.
Summary of the invention
The object of this invention is to provide a kind of operational amplification circuit gathering harmful influence inflammable gas or strength of fluid, it can monitor other inflammable gas and strength of fluid by changing different sensors.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: comprise the sensor MQ3 detecting alcohol, detect the sensor MQ5 of rock gas, detect the sensor MQ136 of sulphuric dioxide, detect the sensor MQ137 of ammonia, and in circuit signal amplification chip selects is AD8572.
That the sensor of described detection chlorine then adopts is comparatively special electric chemical formula gas sensor ME3-CL2.
Signal amplification chip AD8572 in described circuit is a kind of zero shift, single supply, twin-channel operational amplifier, has low cost, high-precision feature, and its imbalance power supply is only 1uv, drifts about as 0.005uv/ DEG C.
The advantage that the present invention has:
1, the present invention is used for detecting that the sensor of chlorine then adopts is comparatively special electric chemical formula gas sensor ME3-CL2, its principle is, utilize the electrochemical oxidation process of gas to be measured in electrolytic cell on working electrode, by electronic circuit by the working electrode of electrolytic cell and contrast electrode constant in a suitable current potential, the electrochemical oxidation of gas to be measured can be there is under this current potential, gas eletrochemistry to be measured reacts the electric current produced and is directly proportional to its concentration, like this, the size by measuring electric current just can determine the concentration of gas to be measured;
2, signal amplification chip selects in circuit is AD8572 in the present invention, be a kind of zero shift, single supply, twin-channel operational amplifier, have low cost, high-precision feature, its imbalance power supply is only 1uv, drift is 0.005uv/ DEG C, is thus particularly suitable for not allowing the application that there is error.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Embodiment
With reference to Fig. 1, gather the operational amplification circuit of harmful influence inflammable gas or strength of fluid, it comprises the sensor MQ3 detecting alcohol, detect the sensor MQ5 of rock gas, detect the sensor MQ136 of sulphuric dioxide, detect the sensor MQ137 of ammonia, and in circuit signal amplification chip selects is AD8572; That the sensor of described detection chlorine then adopts is comparatively special electric chemical formula gas sensor ME3-CL2; Signal amplification chip AD8572 in described circuit is a kind of zero shift, single supply, twin-channel operational amplifier, has low cost, high-precision feature, and its imbalance power supply is only 1uv, drifts about as 0.005uv/ DEG C.
Claims (3)
1. gather the operational amplification circuit of harmful influence inflammable gas or strength of fluid; it is characterized in that comprising the sensor MQ3 detecting alcohol; detect the sensor MQ5 of rock gas; detect the sensor MQ136 of sulphuric dioxide; detect the sensor MQ137 of ammonia, and in circuit signal amplification chip selects is AD8572.
2. the operational amplification circuit of collection harmful influence inflammable gas according to claim 1 or strength of fluid, that it is characterized in that the sensor of described detection chlorine then adopts is comparatively special electric chemical formula gas sensor ME3-CL2.
3. the operational amplification circuit of collection harmful influence inflammable gas according to claim 1 or strength of fluid; it is characterized in that signal amplification chip AD8572 in described circuit; a kind of zero shift, single supply, twin-channel operational amplifier; there is low cost, high-precision feature; its imbalance power supply is only 1uv, drifts about as 0.005uv/ DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457496.XA CN105067767A (en) | 2015-07-30 | 2015-07-30 | Operational amplifier circuit for collecting concentration of hazardous chemical substances (combustible gas or liquid) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457496.XA CN105067767A (en) | 2015-07-30 | 2015-07-30 | Operational amplifier circuit for collecting concentration of hazardous chemical substances (combustible gas or liquid) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105067767A true CN105067767A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510457496.XA Pending CN105067767A (en) | 2015-07-30 | 2015-07-30 | Operational amplifier circuit for collecting concentration of hazardous chemical substances (combustible gas or liquid) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105067767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290499A (en) * | 2016-08-12 | 2017-01-04 | 安徽中杰信息科技有限公司 | Dangerous materials fuel gas collection fortune amplification method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4820386A (en) * | 1988-02-03 | 1989-04-11 | Giner, Inc. | Diffusion-type sensor cell containing sensing and counter electrodes in intimate contact with the same side of a proton-conducting membrane and method of use |
| EP1304565A2 (en) * | 2001-10-22 | 2003-04-23 | PerkinElmer Instruments LLC (a Delaware Corporation) | Electrochemical gas sensor with dry ionomer membrane |
| CN101213439A (en) * | 2005-07-07 | 2008-07-02 | 霍夫曼-拉罗奇有限公司 | Method for the determination of the concentration of a non-volatile analyte |
-
2015
- 2015-07-30 CN CN201510457496.XA patent/CN105067767A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4820386A (en) * | 1988-02-03 | 1989-04-11 | Giner, Inc. | Diffusion-type sensor cell containing sensing and counter electrodes in intimate contact with the same side of a proton-conducting membrane and method of use |
| EP1304565A2 (en) * | 2001-10-22 | 2003-04-23 | PerkinElmer Instruments LLC (a Delaware Corporation) | Electrochemical gas sensor with dry ionomer membrane |
| CN101213439A (en) * | 2005-07-07 | 2008-07-02 | 霍夫曼-拉罗奇有限公司 | Method for the determination of the concentration of a non-volatile analyte |
Non-Patent Citations (1)
| Title |
|---|
| 朱韶红等: "危险品物流监控系统中车载终端的研究与设计", 《网络与信息化》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290499A (en) * | 2016-08-12 | 2017-01-04 | 安徽中杰信息科技有限公司 | Dangerous materials fuel gas collection fortune amplification method |
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |