CN205262546U - Car sewage case water level detection circuit - Google Patents
Car sewage case water level detection circuit Download PDFInfo
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- CN205262546U CN205262546U CN201521121721.4U CN201521121721U CN205262546U CN 205262546 U CN205262546 U CN 205262546U CN 201521121721 U CN201521121721 U CN 201521121721U CN 205262546 U CN205262546 U CN 205262546U
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Abstract
The utility model discloses a car sewage case water level detection circuit adopts microprocessor MCU and several resistance to constitute simple circuit, can detect out the condition of car sewage incasement water level effectively, and it is high to detect the precision, and the circuit is small, low cost to facilitate the use.
Description
Technical field
The utility model relates to a kind of circuit for detection of automobile Effluent tank level.
Background technology
In caravan, commercial vehicle, be equipped with multiple water tank, modal is two kinds of water tanks: clear water tanks and foul water tank. Water purificationCase is used for diet etc., and foul water tank is used for storing sewage. In the time that foul water tank exceedes certain scale, reminding user is timely during to service areaOpen scum cock or automatically open scum cock. Effluent tank level testing circuit of the prior art is often more complicated, bodyLong-pending larger, cost is also higher.
Summary of the invention
Utility model object: the purpose of this utility model is to provide a kind of simple in structure, volume is little, cost is low automobile dirtCistern water level testing circuit.
Technical scheme: for reaching this object, the utility model by the following technical solutions:
Automobile Effluent tank level testing circuit described in the utility model, comprises resistance R 0, and one end of resistance R 0 connects electricitySource VCC, the other end of resistance R 0 connects Micro-processor MCV, and Micro-processor MCV is used for the magnitude of voltage of the other end that gathers resistance R 0And judging the water level situation in foul water tank according to magnitude of voltage, the other end of resistance R 0 is one end of contact resistance R1 also, resistance R 1The other end connects one end of privates, and the other end of privates is exposed, and the other end of privates is arranged in foul water tankWall 3/3 waterline place, the other end of resistance R 1 is one end of contact resistance R2 also, and the other end of resistance R 2 connects one of the second wireEnd, the other end of the second wire is exposed, and the other end of the second wire is arranged on foul water tank inwall 2/3 waterline place, resistance R 2The other end is one end of contact resistance R3 also, and the other end of resistance R 3 connects one end of the first wire, and the other end of the first wire is nakedReveal, the other end of the first wire is arranged on foul water tank inwall 1/3 waterline place; In addition, also comprise privates, privatesOne end ground connection, the other end of privates is exposed, and the other end of privates is arranged on foul water tank inwall 0/3 waterline place.
Further, the other end of described the first wire connects the first metal connection post, and the other end of the second wire connects theTwo metal connection posts, the other end of privates connects the 3rd metal connection post, and the other end of privates connects the 4th metalBinding post.
Further, the resistance of described resistance R 0 is 68K Ω, and the resistance of resistance R 1 is 0, and the resistance of resistance R 2 is 68K Ω,The resistance of resistance R 3 is 112K Ω.
Beneficial effect: automobile Effluent tank level testing circuit of the present utility model adopts simple circuit structure, Neng GouyouThe situation that detects to effect water level in automobile foul water tank, accuracy of detection is high, and circuit volume is little, with low cost, and easy to use.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical solution of the utility model is further introduced.
Of the present utility modelly disclose a kind of automobile Effluent tank level testing circuit, as shown in Figure 1, comprised resistance R 0, electricityOne end of resistance R0 connects power supply VCC, and the other end of resistance R 0 connects Micro-processor MCV, and Micro-processor MCV is used for gathering resistance R 0The other end magnitude of voltage and judge the water level situation in foul water tank according to magnitude of voltage, the other end of resistance R 0 is contact resistance R1 alsoOne end, the other end of resistance R 1 connects one end of privates 3, the other end of privates 3 connects the 3rd metal connection post,The other end of privates 3 is arranged on foul water tank inwall 3/3 waterline place, the other end of resistance R 1 also contact resistance R2 oneEnd, the other end of resistance R 2 connects one end of the second wire 2, and the other end of the second wire 2 connects the second metal connection post, secondThe other end of wire 2 is arranged on foul water tank inwall 2/3 waterline place, and the other end of resistance R 2 is one end of contact resistance R3 also, electricityThe other end of resistance R3 connects one end of the first wire 1, and the other end of the first wire 1 connects the first metal connection post, the first wire 1The other end be arranged on foul water tank inwall 1/3 waterline place; In addition, also comprise privates 4, one end ground connection of privates 4,The other end of privates 4 connects the 4th metal connection post, and the other end of privates 4 is arranged on foul water tank inwall 0/3 water levelLine place.
Wherein, the first wire 1 adopts yellow wire, and the second wire 2 adopts green wire, and privates 3 adopts pink colour to leadLine, privates 4 adopt white wire.
In three dotted line frames in Fig. 1, be all the equivalent circuit of sewage, because sewage can conduct electricity, in the time of energising, have oneFixed resistance value, therefore, can connect to simulate sewage with a resistance and a switch. The sewage equivalence at three waterline placesCircuit is respectively the resistance R 4 at 3/3 waterline place and the resistance R 5 at switch S 1,2/3 waterline place and switch S 2,1/3 waterline placesResistance R 6 and switch S 3.
When water level is during lower than 1/3 waterline, be equivalent to switch S 3 and disconnect, the other end open circuit of resistance R 3, therefore, micro-processingThe magnitude of voltage that the A/D interface of device MCU detects is VCC; In the time that water level reaches 1/3 waterline, be equivalent to switch S 3 and connect, nowResistance R 0, resistance R 1, resistance R 2, resistance R 3 and resistance R 6 are connected, and the magnitude of voltage that the A/D interface of Micro-processor MCV detects is；
When water level is during lower than 2/3 waterline and higher than 1/3 waterline, be equivalent to switch S 2 and disconnect, another of resistance R 2End open circuit, but now because water level has covered 1/3 waterline, be therefore equivalent to switch S 3 and connect, the other end of resistance R 3Ground connection, the magnitude of voltage that the A/D interface of Micro-processor MCV detects is；
In the time that water level reaches 2/3 waterline, be equivalent to switch S 2 and switch S 3 and all connect, the now A/D of Micro-processor MCVThe magnitude of voltage that interface detects is；
When water level is during lower than 3/3 waterline and higher than 2/3 waterline, be equivalent to switch S 1 and disconnect, another of resistance R 1End open circuit, but now because water level has covered 2/3 waterline and 1/3 waterline, be therefore equivalent to switch S 2 and switch S 3All connect, the equal ground connection of the other end of resistance R 2 and resistance R 3, the magnitude of voltage that the A/D interface of Micro-processor MCV detects is；
In the time that water level reaches 3/3 waterline, be equivalent to switch S 1, switch S 2 and switch S 3 and all connect, Micro-processor MCVThe magnitude of voltage that A/D interface detects is。
Wherein, the resistance of resistance R 0 is 68K Ω, and the resistance of resistance R 1 is 0, and the resistance of resistance R 2 is 68K Ω, resistance R 3Resistance be 112K Ω, the resistance value Rx in R4=R5=R6=sewage when conduction.
Claims (3)
1. an automobile Effluent tank level testing circuit, is characterized in that: comprise resistance R 0, one end of resistance R 0 connects power supplyVCC, the other end of resistance R 0 connects Micro-processor MCV, Micro-processor MCV for gather resistance R 0 the other end magnitude of voltage alsoJudge the water level situation in foul water tank according to magnitude of voltage, the other end of resistance R 0 is one end of contact resistance R1 also, resistance R 1 anotherOne end connects one end of privates (3), and the other end of privates (3) is exposed, and the other end of privates (3) is arranged on dirtTank inner wall 3/3 waterline place, the other end of resistance R 1 is one end of contact resistance R2 also, and the other end of resistance R 2 connects second leadsOne end of line (2), the other end of the second wire (2) is exposed, and the other end of the second wire (2) is arranged on foul water tank inwall 2/3 waterBit line place, the other end of resistance R 2 is one end of contact resistance R3 also, and the other end of resistance R 3 connects one end of the first wire (1),The other end of the first wire (1) is exposed, and the other end of the first wire (1) is arranged on foul water tank inwall 1/3 waterline place; In addition,Also comprise privates (4), one end ground connection of privates (4), the other end of privates (4) is exposed, privates (4)The other end is arranged on foul water tank inwall 0/3 waterline place.
2. automobile Effluent tank level testing circuit according to claim 1, is characterized in that: described the first wire (1)The other end connects the first metal connection post, and the other end of the second wire (2) connects the second metal connection post, privates (3)The other end connects the 3rd metal connection post, and the other end of privates (4) connects the 4th metal connection post.
3. automobile Effluent tank level testing circuit according to claim 1, is characterized in that: the resistance of described resistance R 0 is68K Ω, the resistance of resistance R 1 is 0, and the resistance of resistance R 2 is 68K Ω, and the resistance of resistance R 3 is 112K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121721.4U CN205262546U (en) | 2015-12-31 | 2015-12-31 | Car sewage case water level detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521121721.4U CN205262546U (en) | 2015-12-31 | 2015-12-31 | Car sewage case water level detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205262546U true CN205262546U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521121721.4U Active CN205262546U (en) | 2015-12-31 | 2015-12-31 | Car sewage case water level detection circuit |
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| CN (1) | CN205262546U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782406A (en) * | 2017-11-23 | 2018-03-09 | 大连海事大学 | A kind of level sensor based on friction electric induction |
-
2015
- 2015-12-31 CN CN201521121721.4U patent/CN205262546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782406A (en) * | 2017-11-23 | 2018-03-09 | 大连海事大学 | A kind of level sensor based on friction electric induction |
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| GR01 | Patent grant |