CN208190940U - A kind of nitrogen oxide sensor variable-frequency heating control circuit - Google Patents
A kind of nitrogen oxide sensor variable-frequency heating control circuit Download PDFInfo
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- CN208190940U CN208190940U CN201820328823.0U CN201820328823U CN208190940U CN 208190940 U CN208190940 U CN 208190940U CN 201820328823 U CN201820328823 U CN 201820328823U CN 208190940 U CN208190940 U CN 208190940U
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000010438 heat treatment Methods 0.000 title claims abstract description 79
- 230000009466 transformation Effects 0.000 claims abstract description 55
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 148
- 230000005669 field effect Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a kind of nitrogen oxide sensor variable-frequency heating control circuits, the nitrogen oxide sensor variable-frequency heating control circuit is used to carry out variable-frequency heating to nitrogen oxide sensor, including nitrogen oxide sensor, the nitrogen oxide sensor is equipped with ceramic chip, it further include one-chip computer module, IC transformation FM module, heating interface module, the IC transformation FM module, heating interface module all connect one-chip computer module, the IC transformation FM module connection heating interface module, the heating interface module connect ceramic chip.The utility model heats ceramic chip in such a way that transformation regulates and controls, more energy saving and environmentally friendly.
Description
Technical field
The utility model relates to nitrogen oxide sensor technical field, in particular to a kind of nitrogen oxide sensor variable-frequency heating control electricity
Road.
Background technique
The tail gas of motor vehicle emission has become atmosphere NOXThe main source of pollutant.Due to national exhaust emission standard
It improves, it is therefore desirable to the NO in tail gasXDischarge amount is measured in real time and handles, and nitrogen oxide sensor is exactly the detection system
In one of core component.Nitrogen oxide sensor is made of sensor probe and electronic control unit, is connected by harness therebetween.Nitrogen
The part of talking about reunification of lambda sensor is responsible for acquiring tail gas, internal to carry out gas separation, ionization decomposition and measurement concentration three
Step；Electronic control unit is supplied to probe by cable and completes the electric current that above three process needs, and acquires the telecommunications of each process
Number, while metrical information is sent to by CAN bus by engine or other control units.Before nitrogen oxide sensor starts measurement,
The head of its ceramic chip needs to reach and stablize at 700-750 DEG C to guarantee being normally carried out for reaction.But in existing side
In method, majority needs to complete the temperature control to nitrogen oxide sensor by constant current source, leads to the cost for increasing system
And complexity, meanwhile, this heating method has electric current when being also difficult to avoid that heating and flows through external resistance, consumes biggish energy
Consumption, is unfavorable for energy conservation and environmental protection.
Utility model content
The purpose of this utility model is that in view of the drawbacks of the prior art and insufficient, a kind of nitrogen oxide sensor frequency conversion is provided and is added
Thermal control circuit.
To achieve the above object, the utility model uses following technical scheme:
A kind of nitrogen oxide sensor variable-frequency heating control circuit, the nitrogen oxide sensor variable-frequency heating control circuit are used for nitrogen
Lambda sensor carries out variable-frequency heating, including nitrogen oxide sensor, and it further includes single-chip microcontroller mould that the nitrogen oxide sensor, which is equipped with ceramic chip,
Block, IC transformation FM module, heating interface module, the IC transformation FM module, heating interface module all connect single-chip microcontroller mould
Block, the IC transformation FM module connection heating interface module, the heating interface module connect ceramic chip, heat interface mould
Block includes heating interface P1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C9, capacitor C60, inductance L1, electricity
Feel L2, resistance R1, resistance R2,7 pins of the heating interface P1 all pass through capacitor C60 connection earth signal GND, the capacitor C9
It is in parallel with capacitor C60,4 pins of the heating interface P1 are described to heat interface P1's by capacitor C5 connection earth signal GND
3 pins connect one-chip computer module, the heating interface by capacitor C4 connection earth signal GND, 4 pins of the heating interface P1
3 pins of P1 connect IC transformation FM module, and 2 pins of the heating interface P1 connect earth signal GND, the heating interface P1
1 pin by one end of resistance R1 connection inductance L1, one end of the inductance L1 passes through capacitor C1 connection earth signal GND, institute
The other end for stating inductance L1 passes through one end of resistance R2 connection inductance L2, and the other end of the inductance L1 is by capacitor C2 connection
The other end of signal GND, the inductance L2 are become by capacitor C3 connection earth signal GND, the other end connection IC of the inductance L2
FM module is pressed, 8 pins of the heating interface P1 all connect ceramic chip, and the IC transformation FM module includes IC transformation
Frequency modulation chip U10, resistance R45, triode Q2, resistance R43, field-effect metal-oxide-semiconductor Q1, capacitor C42, resistance R42, zener diode
D8, resistance R8, resistance R6, resistance R5, resistance R41, zener diode D1, capacitor C11, diode D4, resistance R7, two pole of pressure stabilizing
3 pins of one end connection single-chip microcontroller U11 of pipe D2, capacitor C12, the resistance R45, the other end connection three of the resistance R45
The base stage of pole pipe Q2,13 pins of the emitter connection IC transformation frequency modulation chip U10 of the triode Q2, the triode Q2's
Collector passes through the pole G of resistance R43 connection field-effect metal-oxide-semiconductor Q1, and the pole S of the field-effect metal-oxide-semiconductor Q1 is connected by capacitor C42
The pole G of field-effect metal-oxide-semiconductor Q1, the resistance R42, zener diode D8 are in parallel with capacitor C42, the field-effect metal-oxide-semiconductor
The pole D of Q1 passes through 2 pins of resistance R8 connection IC transformation frequency modulation chip U10, and 2 pins of the IC transformation frequency modulation chip U10 connect
Heating interface module is connect, the pole D of the field-effect metal-oxide-semiconductor Q1 passes through one end of resistance R6 connection resistance R5, the resistance R5's
By resistance R41 connection earth signal GND, the other end of the resistance R5 connects 4 pins of IC transformation frequency modulation chip U10 for one end,
The other end of the resistance R5 is by zener diode D1 connection earth signal GND, and the zener diode D1 and capacitor C11 phase is simultaneously
Connection, one end of the resistance R5 pass through 24 pins of diode D4 connection IC transformation frequency modulation chip U10, the IC transformation frequency modulation core
The 7 pins connection heating interface module of piece U10, one end of the resistance R7 connect one-chip computer module, and the resistance R7's is another
End passes through zener diode D2 connection earth signal GND, 3 pipes of the other end connection IC transformation frequency modulation chip U10 of the resistance R7
Foot, the capacitor C12 and zener diode D2 are parallel with one another.
Further, one-chip computer module include single-chip microcontroller U11, crystal oscillator module, filter module, reseting module, resistance R18,
Resistance R19, capacitor C41, the crystal oscillator module, filter module, reseting module all connect single-chip microcontroller U11, the single-chip microcontroller U11's
3 pins connect IC transformation FM module, and 62 pins of the single-chip microcontroller U11 pass through capacitor C41 connection earth signal GND, the electricity
Resistance R18 and capacitor C41 is in parallel, and the heating interface module all passes through resistance R19 with IC transformation FM module and connects single-chip microcontroller
62 pins of U11.
Further, the model MC9S08DZ60 of single-chip microcontroller U11.
Further, the model AIC11337 of the IC transformation frequency modulation chip U10.
Further, the crystal oscillator module includes capacitor C23, capacitor C26, resistance R21, resistance R22, the capacitor C23
One end and one end of capacitor C26 all connect earth signal GND, 9 pins of the other end connection single-chip microcontroller U11 of the capacitor C23,
The other end of the capacitor C26 passes through 10 pins of resistance R22 connection single-chip microcontroller U11, and the other end of the capacitor C23 passes through electricity
Hinder the other end of R21 connection capacitor C26.
Further, reseting module includes 5V power supply, resistance R20, capacitor C22, capacitor C25, one end of the resistance R20
5V power supply is connected, the other end of the resistance R20 passes through capacitor C22 connection earth signal GND, the capacitor C25 and capacitor C22 phase
Parallel connection, 11 pins of the other end connection single-chip microcontroller U11 of the resistance R20.
Further, filter module includes capacitor C18, capacitor C19, capacitor C20, capacitor C24, and the one of the capacitor C18
End, one end of capacitor C19, one end of capacitor C20, capacitor C24 one end all connect single-chip microcontroller U11, the capacitor C18's is another
End, the other end of capacitor C19, the other end of capacitor C20, capacitor C24 the other end all connect earth signal GND.
The beneficial effects of the utility model are as follows: the utility model adds ceramic chip in such a way that transformation regulates and controls
Heat, it is more energy saving and environmentally friendly.
Detailed description of the invention
Fig. 1 is the system principle diagram of the utility model entirety.
Fig. 2 is the circuit diagram of the utility model one-chip computer module.
Fig. 3 is the circuit diagram that the utility model heats interface module.
Fig. 4 is the circuit diagram of the utility model IC transformation FM module.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings.
As shown in fig. 1 to fig. 4, a kind of nitrogen oxide sensor variable-frequency heating control circuit, the nitrogen oxide sensor variable-frequency heating
Control circuit is used to carry out nitrogen oxide sensor variable-frequency heating, including nitrogen oxide sensor, and the nitrogen oxide sensor is equipped with ceramic core
Piece 3 further includes one-chip computer module 1, IC transformation FM module 4, heating interface module 2, the IC transformation FM module 4, heating
Interface module 2 all connects one-chip computer module 1, the connection of the IC transformation FM module 4 heating interface module 2, the heating interface
Module 2 connects ceramic chip 3, and heating interface module 2 includes heating interface P1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, electricity
Hold C5, capacitor C9, capacitor C60, inductance L1, inductance L2, resistance R1, resistance R2,7 pins of the heating interface P1 all pass through electricity
Hold C60 connection earth signal GND, the capacitor C9 and capacitor C60 is in parallel, and 4 pins of the heating interface P1 pass through capacitor C5
Earth signal GND is connected, 3 pins of the heating interface P1 are described to heat the 4 of interface P1 by capacitor C4 connection earth signal GND
Pin connects one-chip computer module 1, and 3 pins of the heating interface P1 connect IC transformation FM module 4, the heating interface P1's
2 pins connect earth signal GND, and 1 pin of the heating interface P1 passes through one end of resistance R1 connection inductance L1, the inductance L1
One end by capacitor C1 connection earth signal GND, the one end of the other end of the inductance L1 by resistance R2 connection inductance L2, institute
The other end of inductance L1 is stated by capacitor C2 connection earth signal GND, the other end of the inductance L2 is believed by capacitor C3 connection
The other end of number GND, the inductance L2 connect IC transformation FM module 4, and 8 pins of the heating interface P1 all connect ceramics
Chip 3, the IC transformation FM module 4 include IC transformation frequency modulation chip U10, resistance R45, triode Q2, resistance R43, field effect
Answer metal-oxide-semiconductor Q1, capacitor C42, resistance R42, zener diode D8, resistance R8, resistance R6, resistance R5, resistance R41, two pole of pressure stabilizing
One end connection single-chip microcontroller of pipe D1, capacitor C11, diode D4, resistance R7, zener diode D2, capacitor C12, the resistance R45
The emitter connection IC of 3 pins of U11, the base stage of the other end connecting triode Q2 of the resistance R45, the triode Q2 becomes
13 pins of frequency modulation chip U10 are pressed, the collector of the triode Q2 passes through the pole G of resistance R43 connection field-effect metal-oxide-semiconductor Q1,
The pole S of the field-effect metal-oxide-semiconductor Q1 passes through the pole G of capacitor C42 connection field-effect metal-oxide-semiconductor Q1, the resistance R42, two pole of pressure stabilizing
Pipe D8 is in parallel with capacitor C42, and the pole D of the field-effect metal-oxide-semiconductor Q1 passes through resistance R8 connection IC transformation frequency modulation chip U10's
2 pins, the 2 pins connection heating interface module 2 of the IC transformation frequency modulation chip U10, the D of the field-effect metal-oxide-semiconductor Q1 are extremely logical
One end of resistance R6 connection resistance R5 is crossed, one end of the resistance R5 passes through resistance R41 connection earth signal GND, the resistance R5
The other end connection IC transformation frequency modulation chip U10 4 pins, the other end of the resistance R5 is by zener diode D1 connection
Signal GND, the zener diode D1 and capacitor C11 are in parallel, and one end of the resistance R5 passes through diode D4 connection IC and becomes
Press 24 pins of frequency modulation chip U10, the 7 pins connection heating interface module 2 of the IC transformation frequency modulation chip U10, the resistance
One end of R7 connects one-chip computer module 1, and the other end of the resistance R7 is described by zener diode D2 connection earth signal GND
3 pins of the other end connection IC transformation frequency modulation chip U10 of resistance R7, the capacitor C12 and zener diode D2 are parallel with one another.
As shown in fig. 1 to fig. 4, the one-chip computer module 1 includes single-chip microcontroller U11, crystal oscillator module 12, filter module 11, answers
Position module 13, resistance R18, resistance R19, capacitor C41, the crystal oscillator module 12, filter module 11, reseting module 13 all connect single
3 pins of piece machine U11, the single-chip microcontroller U11 connect IC transformation FM module 4, and 62 pins of the single-chip microcontroller U11 pass through capacitor
C41 connection earth signal GND, the resistance R18 and capacitor C41 are in parallel, the heating interface module 2 and IC transformation FM module
4 all pass through 62 pins of resistance R19 connection single-chip microcontroller U11.
The model MC9S08DZ60 of the single-chip microcontroller U11.
The model AIC11337 of the IC transformation frequency modulation chip U10.
As shown in fig. 1 to fig. 4, the crystal oscillator module 12 includes capacitor C23, capacitor C26, resistance R21, resistance R22, described
One end of capacitor C23 and one end of capacitor C26 all connect earth signal GND, and the other end of the capacitor C23 connects single-chip microcontroller U11
9 pins, the other end of the capacitor C26 passes through 10 pins of resistance R22 connection single-chip microcontroller U11, and the capacitor C23's is another
End passes through the other end of resistance R21 connection capacitor C26.
As shown in fig. 1 to fig. 4, the reseting module 13 includes 5V power supply, resistance R20, capacitor C22, capacitor C25, described
One end of resistance R20 connects 5V power supply, and the other end of the resistance R20 passes through capacitor C22 connection earth signal GND, the capacitor
C25 is in parallel with capacitor C22,11 pins of the other end connection single-chip microcontroller U11 of the resistance R20.
As shown in fig. 1 to fig. 4, filter module 11 includes capacitor C18, capacitor C19, capacitor C20, capacitor C24, the capacitor
One end of C18, one end of capacitor C19, one end of capacitor C20, capacitor C24 one end all connect single-chip microcontroller U11, the capacitor
The other end of C18, the other end of capacitor C19, the other end of capacitor C20, capacitor C24 the other end all connect earth signal GND.
The working principle of circuit is exactly, and after single-chip microcontroller U11 starting, passes through 3 pipes of PTA73 i.e. single-chip microcontroller U11 first
Human hair combing waste goes out weak signal, preheats to ceramic chip, and in general, preheating time is 30 seconds or so, and then PTA7 stops working,
Single-chip microcontroller turns to issue strong signal by PTA5 namely 62 pins, is quickly heated, is made to ceramic chip by heating interface P1
Ceramic chip is brought rapidly up, and heats such as 10ms after a period of time, at this time PTA5 stops output mode, is changed to feedback model i.e.
PTA5 pin is substantially bi-directional mode work, starts the temperature for detecting ceramic chip, if temperature does not arrive setting value, after
Continuous heating, if reaching setting value, stops heating, when stopping heating, PTA5 real-time monitoring temperature always, as long as temperature is lower than setting
Definite value just begins to warm up again, has also just achieved the effect that variable-frequency heating in this way.
The utility model heats ceramic chip in such a way that transformation regulates and controls, more energy saving and environmentally friendly.
It should be noted that listed above is only a kind of specific embodiment of the utility model.Obviously, the utility model
Above embodiments are not limited to, it can also be there are many deforming, in short, those skilled in the art can disclose from the utility model
Content all deformations for directly exporting or associate, be considered as the protection scope of the utility model.
Claims (7)
1. a kind of nitrogen oxide sensor variable-frequency heating control circuit, the nitrogen oxide sensor variable-frequency heating control circuit is used for nitrogen oxygen
Sensor carries out variable-frequency heating, including nitrogen oxide sensor, and the nitrogen oxide sensor is equipped with ceramic chip (3), which is characterized in that also
Including one-chip computer module (1), IC transformation FM module (4), heating interface module (2), the IC transformation FM module (4) adds
Hot interface module (2) all connects one-chip computer module (1), IC transformation FM module (4) connection heating interface module (2), institute
State heating interface module (2) connection ceramic chip (3), heating interface module (2) include heating interface P1, capacitor C1, capacitor C2,
Capacitor C3, capacitor C4, capacitor C5, capacitor C9, capacitor C60, inductance L1, inductance L2, resistance R1, resistance R2, the heating interface
7 pins of P1 all pass through capacitor C60 connection earth signal GND, and the capacitor C9 and capacitor C60 is in parallel, the heating interface P1
4 pins by capacitor C5 connection earth signal GND, 3 pins of the heating interface P1 pass through capacitor C4 connection earth signal GND,
4 pins of the heating interface P1 connect one-chip computer module (1), and 3 pins of the heating interface P1 connect IC transformation frequency modulation mould
Block (4), 2 pins of the heating interface P1 connect earth signal GND, and 1 pin of the heating interface P1 is connected by resistance R1
One end of inductance L1, by capacitor C1 connection earth signal GND, the other end of the inductance L1 passes through electricity for one end of the inductance L1
One end of R2 connection inductance L2 is hindered, for the other end of the inductance L1 by capacitor C2 connection earth signal GND, the inductance L2's is another
One end connects IC transformation FM module (4) by capacitor C3 connection earth signal GND, the other end of the inductance L2, the heating
8 pins of interface P1 all connect ceramic chip (3), the IC transformation FM module (4) include IC transformation frequency modulation chip U10,
Resistance R45, triode Q2, resistance R43, field-effect metal-oxide-semiconductor Q1, capacitor C42, resistance R42, zener diode D8, resistance R8, electricity
Hinder R6, resistance R5, resistance R41, zener diode D1, capacitor C11, diode D4, resistance R7, zener diode D2, capacitor
3 pins of one end connection single-chip microcontroller U11 of C12, the resistance R45, the base of the other end connecting triode Q2 of the resistance R45
Pole, 13 pins of the emitter connection IC transformation frequency modulation chip U10 of the triode Q2, the collector of the triode Q2 pass through
The pole S of the pole G of resistance R43 connection field-effect metal-oxide-semiconductor Q1, the field-effect metal-oxide-semiconductor Q1 passes through capacitor C42 connection field-effect MOS
The pole G of pipe Q1, the resistance R42, zener diode D8 are in parallel with capacitor C42, and the D of the field-effect metal-oxide-semiconductor Q1 is extremely logical
Cross 2 pins of resistance R8 connection IC transformation frequency modulation chip U10, the 2 pins connection heating interface of the IC transformation frequency modulation chip U10
Module (2), the pole D of the field-effect metal-oxide-semiconductor Q1 pass through one end of resistance R6 connection resistance R5, and one end of the resistance R5 passes through
4 pins of the other end connection IC transformation frequency modulation chip U10 of resistance R41 connection earth signal GND, the resistance R5, the resistance
By zener diode D1 connection earth signal GND, the zener diode D1 and capacitor C11's other end of R5 is in parallel, described
One end of resistance R5 passes through 24 pins of diode D4 connection IC transformation frequency modulation chip U10, the IC transformation frequency modulation chip U10's
One end of 7 pins connection heating interface module (2), the resistance R7 connects one-chip computer module (1), the other end of the resistance R7
3 pins of IC transformation frequency modulation chip U10 are connected by the other end of zener diode D2 connection earth signal GND, the resistance R7,
The capacitor C12 and zener diode D2 are parallel with one another.
2. nitrogen oxide sensor variable-frequency heating control circuit according to claim 1, which is characterized in that the one-chip computer module
It (1) include single-chip microcontroller U11, crystal oscillator module (12), filter module (11), reseting module (13), resistance R18, resistance R19, capacitor
C41, the crystal oscillator module (12), filter module (11), reseting module (13) all connect single-chip microcontroller U11, the single-chip microcontroller U11's
3 pins connect IC transformation FM module (4), and 62 pins of the single-chip microcontroller U11 are described by capacitor C41 connection earth signal GND
Resistance R18 is in parallel with capacitor C41, and the heating interface module (2) and IC transformation FM module (4) are all connected by resistance R19
Connect 62 pins of single-chip microcontroller U11.
3. nitrogen oxide sensor variable-frequency heating control circuit according to claim 2, which is characterized in that the single-chip microcontroller U11's
Model MC9S08DZ60.
4. nitrogen oxide sensor variable-frequency heating control circuit according to claim 1, which is characterized in that the IC transformation frequency modulation core
The model AIC11337 of piece U10.
5. nitrogen oxide sensor variable-frequency heating control circuit according to claim 2, which is characterized in that the crystal oscillator module (12)
Including capacitor C23, capacitor C26, resistance R21, resistance R22, one end of the capacitor C23 and one end of capacitor C26 all connect ground
9 pins of the other end connection single-chip microcontroller U11 of signal GND, the capacitor C23, the other end of the capacitor C26 pass through resistance
10 pins of R22 connection single-chip microcontroller U11, the other end of the capacitor C23 pass through the other end of resistance R21 connection capacitor C26.
6. nitrogen oxide sensor variable-frequency heating control circuit according to claim 2, which is characterized in that the reseting module (13)
One end including 5V power supply, resistance R20, capacitor C22, capacitor C25, the resistance R20 connects 5V power supply, the resistance R20's
The other end is in parallel by capacitor C22 connection earth signal GND, the capacitor C25 and capacitor C22, the other end of the resistance R20
Connect 11 pins of single-chip microcontroller U11.
7. nitrogen oxide sensor variable-frequency heating control circuit according to claim 2, which is characterized in that the filter module (11)
Including capacitor C18, capacitor C19, capacitor C20, capacitor C24, one end of the capacitor C18, one end of capacitor C19, capacitor C20
One end, capacitor C24 one end all connect single-chip microcontroller U11, the other end of the capacitor C18, the other end of capacitor C19, capacitor C20
The other end, capacitor C24 the other end all connect earth signal GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820328823.0U CN208190940U (en) | 2018-03-12 | 2018-03-12 | A kind of nitrogen oxide sensor variable-frequency heating control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820328823.0U CN208190940U (en) | 2018-03-12 | 2018-03-12 | A kind of nitrogen oxide sensor variable-frequency heating control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208190940U true CN208190940U (en) | 2018-12-04 |
Family
ID=64439340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820328823.0U Withdrawn - After Issue CN208190940U (en) | 2018-03-12 | 2018-03-12 | A kind of nitrogen oxide sensor variable-frequency heating control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208190940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108337745A (en) * | 2018-03-12 | 2018-07-27 | 宁波安创电子科技有限公司 | A kind of nitrogen oxide sensor variable-frequency heating control circuit |
-
2018
- 2018-03-12 CN CN201820328823.0U patent/CN208190940U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108337745A (en) * | 2018-03-12 | 2018-07-27 | 宁波安创电子科技有限公司 | A kind of nitrogen oxide sensor variable-frequency heating control circuit |
| CN108337745B (en) * | 2018-03-12 | 2024-03-05 | 北京中电伊川测控技术有限公司 | Variable-frequency heating control circuit of nitrogen-oxygen sensor |
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