CN203893911U - Water level detection circuit - Google Patents
Water level detection circuit Download PDFInfo
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- CN203893911U CN203893911U CN201420345640.1U CN201420345640U CN203893911U CN 203893911 U CN203893911 U CN 203893911U CN 201420345640 U CN201420345640 U CN 201420345640U CN 203893911 U CN203893911 U CN 203893911U
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- water level
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Abstract
The utility model provides a water level detection circuit which comprises a water level judgment chip, a first probe, a second probe, a capacitor C1, a capacitor C2, a diode D1, a diode D2, a resistor R1, a resistor R2 and a triode Q3. The first probe TZ1 is connected with an IO port of the water level judgment chip. The second probe ND1 is connected with the capacitor C1. The capacitor C1 is connected with the diode D1. The diode D1 is connected with resistor R1. The resistor R1 is connected with the triode Q3. The connection point between the capacitor C1 and the diode D1 is connected with the diode D2, and the connection point between the diode D1 and the resistor R1 is connected with the capacitor C2. The connection point between the triode Q3 and the resistor R2 is connected with another IO port of the water level judgment chip. The IO port connected with the first probe serves as an alternating current signal output port, and the IO port connected with the connecting point between the triode Q3 and the resister R2 serves as a detection port for judging the water level. By means of the water level detection circuit, the electrolytic action is eliminated, and no incrustation is generated.
Description
Technical field
The utility model relates to water level detecting field, relates more specifically to a kind of water level detection circuit.
Background technology
Existing water level detection circuit makes to have between metal probe and the shell of canister of dress water the DC current of fixed-direction conventionally, to the water effect that can produce electrolysis, in the course of time probe just has thick incrustation scale, affect its sensitivity for the detection of water level, or basic detection less than whether there being water.
Utility model content
The purpose of this utility model is to provide the water level detection circuit that a kind of circuit component quantity is few, circuit is simple and reliable, realizes and stops the incrustation scale generation that electrolytic action causes.
A kind of water level detection circuit, comprises that water level judges chip, the first probe TZ1, the second probe ND1, capacitor C 1, C2, diode D1, D2, resistance R 1, R2, triode Q3; Described the first probe TZ1 judges that with water level one of them IO mouth of chip is connected; Described the second probe ND1 is connected with one end of capacitor C 1, the other end of capacitor C 1 is connected with the negative electrode of diode D2 with the anode of diode D1 respectively, the plus earth of diode D2, the negative electrode of diode D1 is connected with one end of resistance R 1 with one end of capacitor C 2 respectively, the other end ground connection of capacitor C 2, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector of triode Q3 is connected with one end of resistance R 2, another termination direct supply of resistance R 2; Tie point between triode Q3 and resistance R 2 judges that with water level another IO mouth of chip is connected; The IO mouth being connected with the first probe is as AC signal delivery outlet, and the IO mouth being connected with the tie point between triode Q3 and resistance R 2 is as the detection mouth that judges water level.
Drive signal by the IO oral sex being connected with the first spy TZ1 pin stream that judges chip to water level, through the electric current road warp of the first probe TZ1, the second probe ND1 and water formation, triode Q3's with regard to conducting when two probes are crossed in water level submergence, triode Q3 cut-off when water level does not have submergence to cross two probes, then judge that by test water level the method for the voltage of the IO mouth that the tie point with between triode Q3 and resistance R 2 of chip is connected realizes the detection of water level.Exchange type of drive owing to adopting, having stopped electrolytic action does not just have the generation of incrustation scale yet.
Described water level judges that chip is singlechip chip, and described capacitor C 1, C2 are ceramic disc capacitor, and described direct supply is+5V direct supply; The resistance of described resistance R 2 is 1 kilohm.
The beneficial effects of the utility model are: circuit component quantity is few, and circuit is simple and reliable, has stopped electrolytic action, there is no the generation of incrustation scale, and applicable scope is wide.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model circuit.
Embodiment
As shown in Figure 1, a kind of water level detection circuit, comprises that water level judges chip, the first probe TZ1, the second probe ND1, capacitor C 1, C2, diode D1, D2, resistance R 1, R2, triode Q3; The first probe TZ1 judges that with water level one of them IO mouth MCU_IO1 of chip is connected; The second probe ND1 is connected with one end of capacitor C 1, the other end of capacitor C 1 is connected with the negative electrode of diode D2 with the anode of diode D1 respectively, the plus earth of diode D2, the negative electrode of diode D1 is connected with one end of resistance R 1 with one end of capacitor C 2 respectively, the other end ground connection of capacitor C 2, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector of triode Q3 is connected with one end of resistance R 2, another termination direct supply of resistance R 2; Tie point between triode Q3 and resistance R 2 judges that with water level another IO mouth MCU_IO2 of chip is connected; The IO mouth being connected with the first probe is as AC signal delivery outlet, and the IO mouth being connected with the tie point between triode Q3 and resistance R 2 is as the detection mouth that judges water level.
In the present embodiment, water level judges that chip is singlechip chip; Capacitor C 1, C2 are ceramic disc capacitor; Direct supply is+5V direct supply; The resistance of resistance R 2 is 1 kilohm.
When two probes are crossed in water level submergence, water level judges that two that the IO mouth MCU_IO1 output AC square wave of singlechip chip connects by water are visited TZ1 and ND1, exchange driving turn-on transistor Q3, thereby dragged down the voltage of MCU_IO2 port, reach the object of sensed water level.
Water level is not when two probes are crossed in submergence, and due to not conducting of probe, now triode Q3 can be cut off, thereby the voltage of MCU_IO2 port is drawn high, and reaches the object that sensed water level does not arrive.
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.
Claims (5)
1. a water level detection circuit, is characterized in that, comprises that water level judges chip, the first probe TZ1, the second probe ND1, capacitor C 1, C2, diode D1, D2, resistance R 1, R2, triode Q3; Described the first probe TZ1 judges that with water level one of them IO mouth of chip is connected; Described the second probe ND1 is connected with one end of capacitor C 1, the other end of capacitor C 1 is connected with the negative electrode of diode D2 with the anode of diode D1 respectively, the plus earth of diode D2, the negative electrode of diode D1 is connected with one end of resistance R 1 with one end of capacitor C 2 respectively, the other end ground connection of capacitor C 2, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector of triode Q3 is connected with one end of resistance R 2, another termination direct supply of resistance R 2; Tie point between triode Q3 and resistance R 2 judges that with water level another IO mouth of chip is connected; The IO mouth being connected with the first probe is as AC signal delivery outlet, and the IO mouth being connected with the tie point between triode Q3 and resistance R 2 is as the detection mouth that judges water level.
2. water level detection circuit according to claim 1, is characterized in that, described water level judges that chip is singlechip chip.
3. water level detection circuit according to claim 1, is characterized in that, described capacitor C 1, C2 are ceramic disc capacitor.
4. water level detection circuit according to claim 1, is characterized in that, described direct supply is+5V direct supply.
5. water level detection circuit according to claim 1, is characterized in that, the resistance of described resistance R 2 is 1 kilohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345640.1U CN203893911U (en) | 2014-06-26 | 2014-06-26 | Water level detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420345640.1U CN203893911U (en) | 2014-06-26 | 2014-06-26 | Water level detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203893911U true CN203893911U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201420345640.1U Active CN203893911U (en) | 2014-06-26 | 2014-06-26 | Water level detection circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784056A (en) * | 2016-03-03 | 2016-07-20 | 广州赛宝仪器设备有限公司 | Current control circuit and electrode water level monitoring device |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
| CN108427339A (en) * | 2018-02-07 | 2018-08-21 | 厦门芯阳科技股份有限公司 | A kind of stage body flatiron boiler water level state detection circuit and method |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
| CN109839168A (en) * | 2017-11-27 | 2019-06-04 | 佛山市顺德区美的饮水机制造有限公司 | The method and system of water level detection circuit, water level detecting |
| CN112127097A (en) * | 2020-08-17 | 2020-12-25 | 珠海格力电器股份有限公司 | Liquid level detection device, control method, steam box assembly and washing machine |
-
2014
- 2014-06-26 CN CN201420345640.1U patent/CN203893911U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784056A (en) * | 2016-03-03 | 2016-07-20 | 广州赛宝仪器设备有限公司 | Current control circuit and electrode water level monitoring device |
| CN106441501A (en) * | 2016-09-05 | 2017-02-22 | 海尔优家智能科技（北京）有限公司 | Water fullness detection circuit |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
| CN109839168A (en) * | 2017-11-27 | 2019-06-04 | 佛山市顺德区美的饮水机制造有限公司 | The method and system of water level detection circuit, water level detecting |
| CN108427339A (en) * | 2018-02-07 | 2018-08-21 | 厦门芯阳科技股份有限公司 | A kind of stage body flatiron boiler water level state detection circuit and method |
| CN112127097A (en) * | 2020-08-17 | 2020-12-25 | 珠海格力电器股份有限公司 | Liquid level detection device, control method, steam box assembly and washing machine |
| CN112127097B (en) * | 2020-08-17 | 2021-09-28 | 珠海格力电器股份有限公司 | Liquid level detection device, control method, steam box assembly and washing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Water level detection circuit Effective date of registration: 20170720 Granted publication date: 20141022 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd Pledgor: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY CO., LTD.|Foshan Real-Design Software Technology Co., Ltd. Registration number: 2017440000053 |
|
| 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: 20200921 Granted publication date: 20141022 Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd. Pledgor: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY Co.,Ltd. Registration number: 2017440000053 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |