CN206639016U - For automobile instrument water temperature fuel sensor sample circuit - Google Patents
For automobile instrument water temperature fuel sensor sample circuit Download PDFInfo
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- CN206639016U CN206639016U CN201720444356.3U CN201720444356U CN206639016U CN 206639016 U CN206639016 U CN 206639016U CN 201720444356 U CN201720444356 U CN 201720444356U CN 206639016 U CN206639016 U CN 206639016U
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Abstract
For automobile instrument water temperature fuel sensor sample circuit, it is related to a kind of automobile instrument water temperature fuel sensor Sampling techniques, in order to solve in existing cooling-water temperature sensor or fuel sensor sampling system can not be sampled in the case of key door closing and the flimsy problem of sensor.MCU circuits of the present utility model are connected with resistance R2, and resistance R2 is connected with resistance R1 and triode KT1；Resistance R1 and triode KT1 are connected with power supply；Triode KT1 is connected with resistance R3, resistance R4 and resistance R5；Resistance R5 and electric capacity C1 is connected with No.1 A/D sample ports；Electric capacity C1 is grounded；Resistance R3, resistance R4 and resistance R6 are connected as transducing signal input and with sensor；Sensor ground；Resistance R6 and electric capacity C2 with No. two A/D sample ports be connected；Electric capacity C2 is grounded；Sensor is fuel sensor or cooling-water temperature sensor.The probability for reducing sensor degradation is had the beneficial effect that, reduces energy consumption, simplifies automobile instrument circuit, reduces the time that automobile instrument starts.
Description
Technical field
It the utility model is related to a kind of automobile instrument water temperature fuel sensor Sampling techniques.
Background technology
Water temperature sensor for cars substantially can be regarded as being connected to the resistor that automobile instrument varies with temperature above, and
Fuel sensor substantially can be regarded as being connected to the resistor changed above automobile instrument with liquid level；Automobile instrument passes through perception
The change of cooling-water temperature sensor resistance drives water-thermometer, by perceiving the change of fuel sensor resistance drives fuel gauge；Mesh
Following technical disadvantages be present in preceding existing cooling-water temperature sensor or fuel sensor sampling system：Firstth, sensed in existing water temperature
In device or fuel sensor sampling system, the electric current by cooling-water temperature sensor or fuel sensor is excessive, influences cooling-water temperature sensor
Or the service life of fuel sensor；Secondth, existing cooling-water temperature sensor or fuel sensor sampling system need to coordinate automobile
Instrument power voltage sample is completed jointly；3rd, existing cooling-water temperature sensor or fuel sensor sampling system can not be in automobiles
Key door is sampled in the case of closing.
Utility model content
For above-mentioned deficiency, a kind of electric current by sensor of the utility model offer is small, circuit is simply and in key door
What can still be sampled in the case of closing is used for automobile instrument water temperature fuel sensor sample circuit.
It is described in the utility model to be used for automobile instrument water temperature fuel sensor sample circuit, including power supply VCC, MCU electricity
Road, triode KT1, resistance R1 to R6, electric capacity C1 and electric capacity C2；
The control terminal of the MCU circuits is connected with resistance R2 one end, the resistance R2 other end while one with resistance R1
End is connected with triode KT1 base stage；The other end of the resistance R1 and triode KT1 colelctor electrode are simultaneously with power supply VCC's
Positive pole is connected；The emitter stage of the triode KT1 while one end phase with resistance R3 one end, resistance R4 one end and resistance R5
Even；
The other end of the resistance R5 and electric capacity C1 one end are connected with the No.1 A/D sample ports of MCU circuits simultaneously；Electricity
Hold C1 other end ground connection；
The other end of the resistance R3, the resistance R4 other end connect with resistance R6 one end, one end of the resistance R6
As transducing signal input；The transducing signal input is connected with a transducing signal output end of sensor；Sensor
Another transducing signal output head grounding；
The other end of the resistance R6 and electric capacity C2 one end are connected with No. two A/D sample ports of MCU circuits simultaneously；Electricity
Hold C2 other end ground connection；
The sensor is fuel sensor or cooling-water temperature sensor.
When the beneficial effects of the utility model are that this is used for automobile instrument water temperature fuel sensor sample circuit normal work,
It is small by the electric current of sensor, by the electric current of sensor it is 5mA-15mA during normal work, when sensor failure or short
Lu Shi, the maximum current by sensor are 16.7mA, therefore, it is possible to extend the service life of sensor, reduce sensor damage
Bad probability；It is simultaneously small by the electric current of sensor, automobile instrument entirety energy consumption is reduced, has reached the effect of energy-conservation.Pass through
MCU circuits control the working time for being used for automobile instrument water temperature fuel sensor sample circuit, further reduce energy consumption, simultaneously
Close this automatically when MCU electric circuit inspections are to sensor abnormality and be used for automobile instrument water temperature fuel sensor sample circuit,
Play a protective role.This, which is used for automobile instrument water temperature fuel sensor sample circuit, to be adopted by automobile instrument power source voltage
Sample, automobile instrument circuit is simplified, it is cost-effective.Because this is used for the power supply of automobile instrument water temperature fuel sensor sample circuit
It is independent, therefore, it is possible to be sampled when automobile instrument key door is closed, while there is startup to be intended to perceiving driver
It is preceding to carry out sampling the time that reduce automobile instrument startup.
Brief description of the drawings
Fig. 1 is the circuit diagram for automobile instrument water temperature fuel sensor sample circuit described in embodiment one.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, be used for automobile instrument water temperature described in present embodiment
Fuel sensor sample circuit, in the present embodiment, including power supply VCC, MCU circuit 1, triode KT1, resistance R1 to R6,
Electric capacity C1 and electric capacity C2；
The control terminal of the MCU circuits 1 is connected with resistance R2 one end, the resistance R2 other end while one with resistance R1
End is connected with triode KT1 base stage；The other end of the resistance R1 and triode KT1 colelctor electrode are simultaneously with power supply VCC's
Positive pole is connected；The emitter stage of the triode KT1 while one end phase with resistance R3 one end, resistance R4 one end and resistance R5
Even；Triode KT1 break-make is used to control to be used for automobile instrument water temperature fuel sensor sample circuit described in present embodiment
Whether work；
The other end of the resistance R5 and electric capacity C1 one end are connected with the No.1 A/D sample ports of MCU circuits 1 simultaneously；
Electric capacity C1 other end ground connection；
The other end of the resistance R3, the resistance R4 other end connect with resistance R6 one end, one end of the resistance R6
As transducing signal input；The transducing signal input is connected with a transducing signal output end of sensor 2；Sensor
2 another transducing signal output head grounding；
The other end of the resistance R6 and electric capacity C2 one end are connected with No. two A/D sample ports of MCU circuits 1 simultaneously；
Electric capacity C2 other end ground connection；The English full name of MCU circuits 1 is Micro Control Unit, and Chinese is miniature control
Unit, MCU circuits 1 are by identifying that the voltage change of No.1 A/D sample ports and No. two A/D sample ports is fired to calculate fuel gauge
The liquid level of oil or the water temperature of water-thermometer；Triode KT1 break-make is controlled by the control terminal of MCU circuits 1 simultaneously；
The sensor 2 is fuel sensor or cooling-water temperature sensor；When sensor 2 is fuel sensor, transducing signal
Input a transducing signal output end of fuel sensor is connected to by automobile instrument socket；When sensor 2 is water temperature
During sensor, the input of transducing signal is connected to the transducing signal output of cooling-water temperature sensor by automobile instrument socket
End.
In the present embodiment, resistance R1 resistance is 2K ohms, and resistance R2 resistance is 2K ohms, resistance R3 resistance
For 300K ohms, resistance R4 resistance is 300K ohms, and resistance R5 resistance is 100K ohms, and resistance R6 resistance is 100K Europe
Nurse, electric capacity C1 capacitance is 0.01 μ F, and electric capacity C2 capacitance is 0.01 μ F；Electric current by sensor 2 is small, normal work
When by the electric current of sensor 2 be 5mA-15mA, when sensor 2 breaks down or be short-circuit, pass through the maximum current of sensor 2
For 16.7mA, therefore, it is possible to extend the service life of sensor 2, the probability that sensor 2 damages is reduced；Pass through sensor 2 simultaneously
Electric current it is small, reduce automobile instrument entirety energy consumption, reached energy-conservation effect.This is controlled to be used for automotive meter by MCU circuits 1
The working time of table water temperature fuel sensor sample circuit, energy consumption is further reduced, while sensor is detected in MCU circuits 1
Automatically this is closed when abnormal and is used for automobile instrument water temperature fuel sensor sample circuit, is played a protective role.This is used for vapour
Car instrument water temperature fuel sensor sample circuit need not rely on automobile instrument power source voltage sample, simplify automobile instrument circuit,
It is cost-effective.It is independent to be used for the power supply of automobile instrument water temperature fuel sensor sample circuit due to this, therefore, it is possible in automotive meter
Sampled when the closing of watch key door, while carry out sampling before perceiving driver and thering is startup to be intended to reduce automobile
The time that instrument starts.
Embodiment two：Present embodiment is to being used for automobile instrument water temperature fuel oil described in embodiment one
Senser sampling circuit further limits, in the present embodiment, the model MMBT5401 of the triode KT1.
In the present embodiment, using model MMBT5401 triode KT1, the triode KT1 installations of this kind of model
Mode is SMD, has the advantages of easy for installation；The triode KT1 environmental protection classification of this kind of model is leadless environment-friendly type, is had
Free of contamination advantage；The triode KT1 of this kind of model power characteristic is small-power, therefore, has fast response time, consumes energy low
The advantages of.
Embodiment three：Present embodiment is to being used for automobile instrument water temperature fuel oil described in embodiment one
Senser sampling circuit further limits, and in the present embodiment, the power supply VCC is to pass through automobile instrument inside chip voltage stabilizing
Stable 5V voltages after conversion.
Stable 5V voltages after being changed in the present embodiment by the voltage stabilizing of automobile instrument inside chip are the embodiment
Described is powered for automobile instrument water temperature fuel sensor sample circuit, deenergizes conveniently, while reaches and save the energy
Purpose.
Claims (3)
1. it is used for automobile instrument water temperature fuel sensor sample circuit, it is characterised in that including power supply VCC, MCU circuit (1), three
Pole pipe KT1, resistance R1 to R6, electric capacity C1 and electric capacity C2；
The control terminal of the MCU circuits (1) is connected with resistance R2 one end, the resistance R2 other end while one end with resistance R1
It is connected with triode KT1 base stage；The other end of the resistance R1 and triode KT1 colelctor electrode simultaneously with power supply VCC just
Extremely it is connected；The emitter stage of the triode KT1 while one end phase with resistance R3 one end, resistance R4 one end and resistance R5
Even；
The other end of the resistance R5 and electric capacity C1 one end are connected with the No.1 A/D sample ports of MCU circuits (1) simultaneously；Electricity
Hold C1 other end ground connection；
The other end of the resistance R3, the resistance R4 other end connect with resistance R6 one end, one end conduct of the resistance R6
Transducing signal input；The transducing signal input is connected with a transducing signal output end of sensor (2)；Sensor
(2) another transducing signal output head grounding；
The other end of the resistance R6 and electric capacity C2 one end are connected with No. two A/D sample ports of MCU circuits (1) simultaneously；Electricity
Hold C2 other end ground connection；
The sensor (2) is fuel sensor or cooling-water temperature sensor.
2. according to claim 1 be used for automobile instrument water temperature fuel sensor sample circuit, it is characterised in that described three
Pole pipe KT1 model MMBT5401.
3. according to claim 2 be used for automobile instrument water temperature fuel sensor sample circuit, it is characterised in that the electricity
Source VCC is the stable 5V voltages after being changed by the voltage stabilizing of automobile instrument inside chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720444356.3U CN206639016U (en) | 2017-04-25 | 2017-04-25 | For automobile instrument water temperature fuel sensor sample circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720444356.3U CN206639016U (en) | 2017-04-25 | 2017-04-25 | For automobile instrument water temperature fuel sensor sample circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206639016U true CN206639016U (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720444356.3U Active CN206639016U (en) | 2017-04-25 | 2017-04-25 | For automobile instrument water temperature fuel sensor sample circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919117A (en) * | 2017-04-25 | 2017-07-04 | 航天科技控股集团股份有限公司 | For automobile instrument water temperature fuel sensor sample circuit |
-
2017
- 2017-04-25 CN CN201720444356.3U patent/CN206639016U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919117A (en) * | 2017-04-25 | 2017-07-04 | 航天科技控股集团股份有限公司 | For automobile instrument water temperature fuel sensor sample circuit |
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