CN206906303U - Multi-component gas sensor - Google Patents
Multi-component gas sensor Download PDFInfo
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- CN206906303U CN206906303U CN201720740078.6U CN201720740078U CN206906303U CN 206906303 U CN206906303 U CN 206906303U CN 201720740078 U CN201720740078 U CN 201720740078U CN 206906303 U CN206906303 U CN 206906303U
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- heaters
- metal oxide
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- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 15
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 65
- 238000001514 detection method Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 11
- 239000000284 extract Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The utility model discloses a multi-component gas sensor, including the electrical unit, be connected with heating unit, Pt10 heater and metal oxide sensing element on the electrical unit, heating unit and Pt10 heater connection, metal oxide sensing element lay on the ceramic heating basement, and the laminating of ceramic heating basement and Pt10 heater, just metal sensing element be a plurality of. In this structure, Pt10 is used as the main component of the heater, which is used as a thermistor to feed back the heating temperature value in real time through the resistance value, and then various components of the gas to be detected are detected by the metal oxide sensitive element.
Description
Technical field
This utility patent is related to gas sensor domain, can more particularly to detect the sensor neck of multicomponent gas simultaneously
Domain, in particular to the multicomponent gas sensor and its gas detection method of a kind of multi-temperature timesharing measurement.
Background technology
Gas sensor is that a kind of be converted into the information such as the composition of gas, concentration can be by personnel, instrument and meter, calculating
The device for the information that machine etc. utilizes, certain gas volume fraction can be transformed into corresponding electric signal.Gas sensor for
The response curve of different gas be sensor detection object gas composition and concentration basic foundation, gas sensor output by
Two key parameters of composition and concentration of gas influence, and gas sensor has different curves to ring for different gas componants
Answer rate of change, gas concentration is measurand, influence be curvilinear motion depth and amplitude.How a sensor is used
To detect multicomponent gas, turn into a big focus of current gas sensor domain.There are various gases on the market now
Sensor, using also quite extensive.But the gas sensor of in the market can only measure single type gas, for multi-component gas
Body needs more gas sensor combinations just to measure, and multicomponent gas can be measured simultaneously relative to single gas sensor
For, cost is greatly improved, and the volume of sensor is also relative to be become very large.This utility patent is directed to this problem, according to not
With the gas responsiveness different to gas sensor at different temperature, employ using a gas sensor in difference
At a temperature of timesharing measurement multicomponent gas detection method, multiple gases can be detected simultaneously by realizing single sensor, greatly
Ground improves the cost performance and integrated level and the relative volume for reducing the gas sensor of the gas sensor.
Utility model content
To solve the above problems, this utility patent provides a kind of small volume, integration degree is high, has unique dimensionality reduction
The detection of gas with multiple constituents and its gas detection method of algorithm.
A kind of multicomponent gas sensor of this practical design, including ECU, it is single that heating is connected with ECU
Member, Pt10 heaters and metal oxide sensing element, heating unit are connected with Pt10 heaters, described metal oxide
Sensing element is laid in ceramic heat substrate, and ceramic heat substrate is bonded with Pt10 heaters, and described metal is sensitive
Element is multiple.In this configuration, it is critical piece by the use of Pt10 as heater, it can pass through it as thermistor
Its heating-up temperature value of resistance value Real-time Feedback, the various composition of tested gas is then detected by metal oxide sensing element.
Further scheme is that described Pt10 heaters are membrane type structure.The quantity of described metal sensing element
For 3, described heating unit and ECU are made up of MCU and the PWM of periphery control power supply circuits.
This multicomponent gas sensor, its metal oxide sensing element, which must operate under high temperature, could be carried out accurately
Gasmetry, its surface area is bigger, thickness is smaller detects sensitiveer, therefore corresponding Pt10 heaters also design of thin to gas
Film-type structure.And Pt10 can produce heat as load energization, therefore we control it by controlling Pt10 conduction time
Heating-up temperature, and Pt10 enough detects the i.e. real-time resistance of the temperature of its own in real time as temperature sensor and can in itself, from
And feed back to heating control circuit and form closed-loop control.
A kind of gas detection method using such as above-mentioned multicomponent gas sensor, by the temperature for controlling Pt10 heaters
So that different metal sensing elements makes corresponding reaction to corresponding gas, then exported from metal sensing element
Data, and the primary data to obtaining carries out dimensionality reduction computing, extract characteristic signal, the final species for calculating detection gas and dense
Degree.
Further scheme is that the temperature of the control Pt10 heaters is the temperature of time-division transfer Pt10 heaters, i.e.,
Within a certain period of time so that Pt10 heaters are maintained in a temperature, following sessions are maintained in other temperature.
Further scheme is that described dimensionality reduction computing uses equation below：
Eigenmatrix
Wherein X is the matrix of sensor, and Xnn is the element of eigenmatrix, is obtained according to metal sensing element material property；
Described feature extraction uses equation below：
Dimensionality reduction extracts
Wherein S1, S2, S3 are the readings of three metal sensing elements, by dimensionality reduction extract to obtain element Ya in matrix Y,
Yb、Yc；
Final calculating gas and concentration use equation below：
Result of calculation
Wherein K is calibration coefficient, and C is corresponding gas concentration.
Compared with prior art, this practicality have the advantage that for：
Because this practicality is using the structure of the single multiple metal sensing elements of gas sensor laying, while further make
By the use of Pt10 as heating and temperature control critical piece, the volume and effective detection rate of sensor are greatly reduced, has reached single and has only passed
Sensor detects the effect of multiple gases component, greatly reduces the cost of sensor, and sensor cost performance has very big carry
Rise, sensor integration degree greatly improves, and dramatically reduces the volume of sensor.On the other hand, this practicality have also been devised special
Dimensionality reduction computation rule, while the data of three metal sensing elements are read, and it is effectively handled, it is effective so as to reach
Gas component purpose is distinguished, good with gas-selectively, gas sensor domain has very big versatility and ductility, has
It is widely applied.
Brief description of the drawings
Fig. 1 is the structural representation of gas sensor Pt10 heaters and metal oxide metal sensing element.
Fig. 2 is gas sensor basic function module schematic diagram.
Fig. 3 is that the timesharing of gas sensor multi-temperature detects basic schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in this practical embodiment, the technical scheme in this practical embodiment is carried out clear, complete
Site preparation describes.
Embodiment 1
Fig. 1~3 and this practical optional embodiment is following description described to instruct those skilled in the art how real
Apply and reproduce this practicality.In order to instruct this practical technique scheme, simplify or eliminate some conventional aspects.People in the art
Member is it should be appreciated that being derived from the deformation of these embodiments or replacing in this practical scope.Those skilled in the art should
Understanding following characteristics can combine to form multiple modifications of this practicality in a variety of ways.Thus, this practicality is not limited to down
Optional embodiment is stated, and is only limited by claim and their coordinate.
The multicomponent gas sensor of the present embodiment description, including ECU, be connected with ECU heating unit,
Pt10 heaters 1 and metal oxide sensing element 3, heating unit are connected with Pt10 heaters 1, described metal oxide
Sensing element 3 is laid in ceramic heat substrate 2, and ceramic heat substrate 2 is bonded with Pt10 heaters 1, and described metal
Sensing element 3 is 3.Wherein described Pt10 heaters 1 are membrane type structure.Described heating unit and ECU by
MCU and the PWM of periphery control power supply circuit compositions.
Using the gas detection method of such as above-mentioned multicomponent gas sensor, by the temperature for controlling Pt10 heaters
Different metal sensing elements make corresponding reaction to corresponding gas, and output number is then obtained from metal sensing element
According to, and the primary data to obtaining carries out dimensionality reduction computing, extracts characteristic signal, the final species and concentration for calculating detection gas.
The temperature of the control Pt10 heaters is the temperature of time-division transfer Pt10 heaters, i.e., makes within a certain period of time
Obtain Pt10 heaters to be maintained in a temperature, following sessions are maintained in other temperature.
Described dimensionality reduction computing uses equation below：
Eigenmatrix
Wherein X is the matrix of sensor, and Xnn is the element of eigenmatrix, is obtained according to metal sensing element material property；
Described feature extraction uses equation below：
Dimensionality reduction extracts
Wherein S1, S2, S3 are the readings of three metal sensing elements, by dimensionality reduction extract to obtain element Ya in matrix Y,
Yb、Yc；
Final calculating gas and concentration use equation below：
Result of calculation
Wherein K is calibration coefficient, according to the material of metal sensing element, the error of electronic equipment, the characteristic of object gas
Obtain.C is corresponding gas concentration.
During work：The multicomponent gas sensor detecting method of described multi-temperature timesharing inspection is by described automatically controlled list
The peripheral power supply circuit of MCU output pwm signals control heating unit in member, by controlling the dutycycle in power-up period, comes
To described Pt10 heating installation power supplies, described Pt10 heaters are thermistor in itself, and it, which can be powered, produces heat conduct
Heater, described ECU can be also fed back to by its resistance value and calculates the temperature for appearing in described Pt10 heaters
Value.As shown in Fig. 3, PWM export ratios power-on time is adjusted come described Pt10 heaters by described ECU
Reach target temperature.And heating source of the described Pt10 heaters as described metal oxide sensing element so that institute
The metal oxide sensing element stated possesses gas detection function, it comprises three different metal sensing elements, for not
Same gas has different response changes, and each metal sensing element has different resistance changes, passes through described electricity
The resistance signal that unit gathers three metal sensing elements is controlled, obtains three measured values.Then using three metal sensing elements as
Reference axis establishes three-dimensional system of coordinate in space, by described multicomponent gas concentration computation model, to gas sensor
Magnanimity output signal carries out dimensionality reduction, therefrom extracts characteristic signal, and final acquisition result is calculated for different gas.
Claims (3)
1. a kind of multicomponent gas sensor, including ECU, it is characterized in that being connected with heating unit, Pt10 on ECU
Heater and metal oxide sensing element, heating unit are connected with Pt10 heaters, described metal oxide sensing element
In the ceramic heat that is laid in substrate, and ceramic heat substrate is bonded with Pt10 heaters, and the sensitive member of described metal oxide
Part is multiple.
2. multicomponent gas sensor according to claim 1, it is characterized in that described Pt10 heaters are film-type knot
Structure.
3. multicomponent gas sensor according to claim 1 or 2, it is characterized in that the quantity of described metal sensing element
For 3, described heating unit and ECU are made up of MCU and the PWM of periphery control power supply circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720740078.6U CN206906303U (en) | 2017-06-23 | 2017-06-23 | Multi-component gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720740078.6U CN206906303U (en) | 2017-06-23 | 2017-06-23 | Multi-component gas sensor |
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| Publication Number | Publication Date |
|---|---|
| CN206906303U true CN206906303U (en) | 2018-01-19 |
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ID=61283928
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720740078.6U Active CN206906303U (en) | 2017-06-23 | 2017-06-23 | Multi-component gas sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478687A (en) * | 2017-06-23 | 2017-12-15 | 杭州麦乐克科技股份有限公司 | Multi-component gas sensor and gas detection method thereof |
| CN110031591A (en) * | 2019-04-19 | 2019-07-19 | 东北大学 | A kind of micro-nano gas sensor array dynamic testing method |
-
2017
- 2017-06-23 CN CN201720740078.6U patent/CN206906303U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478687A (en) * | 2017-06-23 | 2017-12-15 | 杭州麦乐克科技股份有限公司 | Multi-component gas sensor and gas detection method thereof |
| CN110031591A (en) * | 2019-04-19 | 2019-07-19 | 东北大学 | A kind of micro-nano gas sensor array dynamic testing method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A multi-component gas sensor and a gas detection method Effective date of registration: 20181228 Granted publication date: 20180119 Pledgee: Hangzhou United Rural Commercial Bank, Limited by Share Ltd branch of science and technology Pledgor: Hangzhou Mai peak Polytron Technologies Inc Registration number: 2018330000534 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210425 Granted publication date: 20180119 Pledgee: Hangzhou United Rural Commercial Bank Limited by Share Ltd. branch of science and technology Pledgor: HANGZHOU MULTI IR TECHNOLOGY Co.,Ltd. Registration number: 2018330000534 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |