CN203745412U - Corrosive gas detection sensor of circuit board - Google Patents
Corrosive gas detection sensor of circuit board Download PDFInfo
- Publication number
- CN203745412U CN203745412U CN201420151339.7U CN201420151339U CN203745412U CN 203745412 U CN203745412 U CN 203745412U CN 201420151339 U CN201420151339 U CN 201420151339U CN 203745412 U CN203745412 U CN 203745412U
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- circuit board
- detecting sensor
- positive electrode
- interdigital
- digital
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Abstract
The utility model discloses a corrosive gas detection sensor of a circuit board. The corrosive gas detection sensor comprises a base plate (22), a sensing unit (24), a protective cover (26) and a heating piece (28), wherein the sensing unit (24) is arranged on the base plate and is provided with an inter-digital positive electrode (242), an inter-digital negative electrode (244) and a dyeing gas sensitive layer (246); the inter-digital negative electrode (244) is intersected with the inter-digital positive electrode; the dyeing gas sensitive layer (246) is arranged between the inter-digital positive electrode and the inter-digital negative electrode; the inter-digital positive electrode and the inter-digital negative electrode are capable of exerting driving voltage on the dyeing gas sensitive layer, and the sensing unit is capable of outputting sensing current; the protective cover (26) covers the sensing unit; the heating piece is arranged on the base plate and is capable of heating the corrosive gas detection sensor.
Description
Technical field
The utility model relates to the whether etchant gas detecting sensor of being corroded property gas attack of a kind of testing circuit plate, relate in particular to a kind of for servo drive system, the etchant gas detecting sensor of circuit board.
Background technology
Servo drive system is usually used in the environment with corrosive gas, and corrosive gas is such as having chlorine dioxide, chlorine, sulfuretted hydrogen etc.These corrosive gass penetrate in servo-control system, and contact with circuit board wherein.Corrosive gas is open circuit potential plate little by little, finally causes the fault of circuit board.At present, for the assessment of circuit board corrosion, need in laboratory, by professional instrument, detect, waste time and energy.
Utility model content
The purpose of this utility model is to provide a kind of etchant gas detecting sensor of the circuit board for detection of corrosive gas around circuit board.
The utility model provides a kind of etchant gas detecting sensor of circuit board, and it comprises a substrate, a sensing cell, a protective cover and a heating member.Sensing cell is arranged at substrate, it is provided with an interdigital positive electrode, one and interdigitated positive electrode interdigital negative electrode and a dyeing gas sensing layer being arranged between interdigital positive electrode and interdigital negative electrode arranged in a crossed manner, interdigital positive electrode and interdigital negative electrode can apply a driving voltage in dyeing gas sensing layer, and the exportable current sensor of sensing cell.Protective cover covers at sensing cell.Heating member is arranged at substrate, and it can heat etchant gas detecting sensor.
In another schematic embodiment of the etchant gas detecting sensor of circuit board, the thickness of dyeing gas sensing layer is 100nm to 1um.
In the schematic embodiment of another kind of the etchant gas detecting sensor of circuit board, etchant gas detecting sensor comprises a thermoelectric element that is attached at circuit board, and the heat that it can produce circuit board work be converted to power delivery to heating member.
Accompanying drawing explanation
The following drawings only schematically illustrates and explains the utility model, does not limit scope of the present utility model.
Fig. 1 is for illustrating the structural representation of the etchant gas detecting sensor of circuit board.
Fig. 2 is for illustrating the interdigital positive electrode of etchant gas detecting sensor of circuit board and the structure of interdigital negative electrode.
Fig. 3 is for illustrating the structural representation of a kind of exemplary embodiment of etchant gas pick-up unit of circuit board.
Fig. 4 is for illustrating the structural representation of the another kind of exemplary embodiment of etchant gas pick-up unit of circuit board.
Label declaration
10 circuit boards
20 etchant gas detecting sensors
22 substrates
24 sensing cells
242 interdigital positive electrodes
244 interdigital negative electrodes
246 dyeing gas sensing layers
26 protective covers
28 heating members
29 heating elements
30 control modules
32 power supply units
33 LED elements
34 digital to analog converters
36 control circuits
38 storage unit
39 display units
392 display drivers
394 digital indicators.
Embodiment
For the technical characterictic of utility model, object and effect being had more clearly, understand, now contrast accompanying drawing embodiment of the present utility model is described, in each figure, identical label represents identical part.
In this article, " schematically " expression " is served as example, example or explanation ", any diagram, the embodiment that are described in this article " schematically " should be interpreted as a kind of preferred or have more the technical scheme of advantage.
For making drawing succinct, in each figure, only schematically shown the part relevant to the utility model, they do not represent that it is as the practical structures of product.In addition, so that drawing is succinctly convenient to understand, in some figure, there are the parts of same structure or function, only schematically illustrated one of them, or only marked one of them.
In this article, " one " not only represents " only this ", also can represent the situation of " more than one ".
Fig. 1 is for illustrating the structural representation of the etchant gas detecting sensor of circuit board.Fig. 2 is for the structure of interdigital positive electrode in the etchant gas detecting sensor of key diagram 1 circuit board and interdigital negative electrode.Referring to Fig. 1 and Fig. 2, etchant gas detecting sensor 20 comprises a substrate 22, sensing cell 24, protective cover 26 and a heating member 28.
Sensing cell 24 is arranged at substrate 22.Sensing cell 24 is provided with an interdigital positive electrode 242, interdigital negative electrode 244 and a dyeing gas sensing layer 246.Interdigital positive electrode 242 and interdigital negative electrode 244 are arranged in a crossed manner, and dyeing gas sensing layer 246 is arranged between interdigital positive electrode 242 and interdigital negative electrode 244.The adsorbable corrosive gas of dyeing gas sensing layer 246, such as chlorine dioxide, chlorine, sulfuretted hydrogen etc.When dyeing gas sensing layer 246 absorption corrosive gas, its color and resistivity change.When interdigital positive electrode 242 and interdigital negative electrode 244 apply a driving voltage in dyeing gas sensing layer 246, the current sensor of sensing cell 24 outputs can change along with the kind of corrosive gas and concentration.
In a kind of exemplary embodiment of etchant gas detecting sensor of circuit board, dyeing gas sensing layer 246 is prepared by rare earth phthalocyanine, can also use the material substitutions such as azo, perylene.In addition, the thickness range of dyeing gas sensing layer 246 is 100nm to 1um, in this thickness range, and the current sensor that the exportable numerical value of sensing cell 24 is relatively large.Can be according to the thickness of material cost and the definite dyeing of process conditions gas sensing layer 246.
Protective cover 26 covers at sensing cell 24.Protective cover 26 can prevent that dust from contacting with dyeing gas sensing layer 246.Protective cover 26 also has transparent and ventilative characteristic, can see through the change color that protective cover 26 is observed dyeing gas sensing layer on the one hand, makes on the other hand gas can see through protective cover and contacts with dyeing gas sensing layer 246.For example can use fritted glass to make protective cover.
Heating member 28 is arranged at substrate 22.When etchant gas pick-up unit completes after the detection of corrosive gas, heating member 28 can conduct heat to the gas sensing layer 246 that dyes by substrate 22, thereby make to be adsorbed in dyeing gas sensing layer 246 corrosive gas desorptions, can avoid being thus adsorbed in dyeing gas sensing layer 246 corrosive gass affects etchant gas pick-up unit and detects next time.
The etchant gas detecting sensor of circuit board can detect other corrosive gas of PPM level, has very high sensitivity, and fast response time, simple in structure.
Fig. 3, for the structural representation of a kind of exemplary embodiment of corrosive gas pick-up unit of circuit board is described, in order to clearly illustrate annexation, is plotted in control module respectively in two regions in Fig. 3.As shown in Figure 3, the utility model also discloses a kind of etchant gas pick-up unit of circuit board, and it comprises above-mentioned etchant gas detecting sensor 20 and control module 30.Wherein, according to the layout structure of components and parts in circuit board 10, each etchant gas detecting sensor 20 is attached to the diverse location of circuit board 10, can also be according to the quantity of the size of circuit board and structural adjustment corrosive gas detecting sensor 20.Control module 30 comprises a power supply unit 32, digital to analog converter 34, control circuit 36, storage unit 38 and a display unit 39.
Wherein, power supply unit 32 can be interdigital positive electrode 242 and 244 power supplies of interdigital negative electrode of each sensing cell 24, makes interdigital positive electrode 242 and interdigital negative electrode 244 produce the driving voltage that puts on dyeing gas sensing layer 246.Power supply unit can be realized by LM317 type integrated circuit.
Digital to analog converter 34 is for realizing the mutual conversion of simulating signal and digital signal.Digital to analog converter 34 is connected in each etchant gas detecting sensor 20 and control circuit 36.Digital to analog converter 34 receives after the induction current of analog quantity form, can be converted into the current digital signal of digital quantity form.Digital to analog converter can be realized by ADS1147 type integrated circuit.
Control circuit 36 is also connected in storage unit 38 and display unit 39.In storage unit 38, prestore demarcation eigenwert.It is corresponding with specific corrosive gas that these demarcate eigenwert, while dyeing the certain density particular etch gas of gas sensing layer 246 absorption, and the numerical value of the current digital signal that the current sensor of etchant gas detecting sensor 20 outputs is corresponding.For different corrosive gass, these demarcate eigenwert difference.Control circuit 36 can read these demarcation eigenwerts that prestore in storage unit 38, and relatively the current digital signal of each etchant gas detecting sensor 20 correspondences and these are demarcated eigenwert, if the digital current signal of some or several etchant gas detecting sensor 20 correspondences is more than or equal to some demarcation eigenwerts, can judge the corrosive gas type that circuit board is produced to corrosion.Control circuit can be realized by STM8L151 type integrated circuit, and storage unit is EEPROM (Electrically Erasable Programmable Read Only Memo).
Control circuit 36 can export digital current signal and the comparative result of demarcating eigenwert to display unit 39, and display unit 36 can show the type that whether has corrosive gas and corrosive gas.Display unit 39 comprises a display driver 392 and a digital indicator 394.Display driver 392 is connected in control circuit 36 and digital indicator 394.Control circuit 36 exports digital current signal and the comparative result of demarcating eigenwert to display driver 392, and display driver 392 control figure displays 394 show the type that whether has corrosive gas and corrosive gas.Display driver 392 and digital indicator 394 are commercially available standard configuration, as required concrete configuration.
In a kind of exemplary embodiment of etchant gas detecting sensor of circuit board, etchant gas detecting sensor 20 comprises a thermoelectric element 29, and it is attached at circuit board 10.When etchant gas detecting sensor 20 completes after the detection of corrosive gas, the partial heat energy that thermoelectric element 29 can produce circuit board 10 work is converted to power delivery to each heating member 28.Thermoelectric element can be used the nonmetallic materials with thermoelectricity transfer capability, for example barium titanate ceramics.
Fig. 4, for the structural representation of the another kind of exemplary embodiment of etchant gas pick-up unit of circuit board is described, only schematically draws an etchant gas detecting sensor and an alarm unit in figure.As shown in Figure 4, control module 30 comprises the alarm unit corresponding with etchant gas detecting sensor 20 31.Alarm unit 31 is provided with a sampling resistor R, a comparator C omp and a LED element 33.
Wherein, sampling resistor R can be converted to the induction current corresponding with it sampled voltage.Comparator C omp is preset with a nominal voltage.While there is corrosion corresponding to circuit board in nominal voltage, the minimum value of the current sensor of etchant gas detecting sensor 20 outputs.Comparator C omp can be by nominal voltage and sampled voltage comparison, if nominal voltage is greater than sampled voltage, an enabling signal of comparator C omp output makes 33 conductings of LED element luminous.Operating personnel can by whether LED element 33 is luminous, whether decision circuitry plate there is corrosion.Comparator C omp can be realized by LM2901 type integrated circuit.
Be to be understood that, although this instructions is described according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should make instructions as a whole, technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Listed a series of detailed description is above only illustrating for feasibility embodiment of the present utility model; they are not in order to limit protection domain of the present utility model; allly do not depart from equivalent embodiment or the change that the utility model skill spirit is done; as the combination of feature, cut apart or repeat, within all should being included in protection domain of the present utility model.
Claims (3)
1. the etchant gas detecting sensor of circuit board, is characterized in that it comprises:
A substrate (22),
A sensing cell (24) that is arranged at described substrate (22), it is provided with an interdigital positive electrode (242), one and described interdigitated positive electrode (242) interdigital negative electrode (244) and a dyeing gas sensing layer (246) being arranged between described interdigital positive electrode (242) and described interdigital negative electrode (244) arranged in a crossed manner, described interdigital positive electrode (242) and described interdigital negative electrode (244) can apply a driving voltage in described dyeing gas sensing layer (246), and the exportable current sensor of described sensing cell (24)
A protective cover (26) that covers at described sensing cell (24), and
A heating member (28) that is arranged at described substrate (22), it can heat described etchant gas detecting sensor (20).
2. the etchant gas detecting sensor of circuit board as claimed in claim 1, the thickness that it is characterized in that described dyeing gas sensing layer (246) is 100nm to 1um.
3. the etchant gas detecting sensor of circuit board as claimed in claim 1, it is characterized in that described etchant gas detecting sensor (20) comprises a thermoelectric element (29) that is attached at described circuit board (10), the heat that it can produce described circuit board (10) work is converted to power delivery to described heating member (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151339.7U CN203745412U (en) | 2014-03-31 | 2014-03-31 | Corrosive gas detection sensor of circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151339.7U CN203745412U (en) | 2014-03-31 | 2014-03-31 | Corrosive gas detection sensor of circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745412U true CN203745412U (en) | 2014-07-30 |
Family
ID=51345197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151339.7U Expired - Fee Related CN203745412U (en) | 2014-03-31 | 2014-03-31 | Corrosive gas detection sensor of circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745412U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422182A (en) * | 2017-06-14 | 2017-12-01 | 珠海中慧微电子股份有限公司 | Direct current energy meter |
| CN118604066A (en) * | 2024-08-06 | 2024-09-06 | 广州奥松电子股份有限公司 | Sensor chip packaging structure, sensor chip packaging mode and gas sensor |
-
2014
- 2014-03-31 CN CN201420151339.7U patent/CN203745412U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422182A (en) * | 2017-06-14 | 2017-12-01 | 珠海中慧微电子股份有限公司 | Direct current energy meter |
| CN118604066A (en) * | 2024-08-06 | 2024-09-06 | 广州奥松电子股份有限公司 | Sensor chip packaging structure, sensor chip packaging mode and gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20210331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |