CN104282121A - High-sensitivity water sensor and amplifier circuit - Google Patents
High-sensitivity water sensor and amplifier circuit Download PDFInfo
- Publication number
- CN104282121A CN104282121A CN201410583332.7A CN201410583332A CN104282121A CN 104282121 A CN104282121 A CN 104282121A CN 201410583332 A CN201410583332 A CN 201410583332A CN 104282121 A CN104282121 A CN 104282121A
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- CN
- China
- Prior art keywords
- water
- probe
- triode
- resistance
- water logging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/20—Status alarms responsive to moisture
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a high-sensitivity water sensor and amplifier circuit which comprises a positive metal water immersion detection end, a negative metal water immersion detection end, a first transient suppression diode, a first resistor, a third triode and a second resistor. The water immersion detection ends are made of metal. When water exists between the two metal water immersion detection ends, due to the fact that voltages exist between the two metal water immersion detection ends, the water is ionized, the two metal water immersion detection ends are connected, currents pass through a base electrode of the first resistor and a base electrode of the first triode, then the emitter end and the collector end of the first triode are connected, the voltage of the emitter end of the first triode is changed to be the high level from the lower level, and the two metal water immersion detection ends are immersed in the water in the change. The circuit integrates the function of a sensor and the function of an amplifier, the water immersion information can be sensed with high sensitivity, and water immersion signals are processed by a single-chip microcomputer. The circuit is simple in design, low in cost, easy to implement and high in sensitivity.
Description
Technical field
The invention belongs to electronic information field, particularly high sensitivity water sensor and amplifying circuit.
Background technology
In daily life; often the tap water escape in family can be run into; or the heating installation in the north has been metalled run out, or sewer has blocked up the situation of anti-addle in own home, brings no small economic loss can to oneself or neighbours downstairs; make troubles to family life; water immersion alarm price is in the market higher, and circuit is complicated, and practicality is bad; not easy care, sensitivity is low.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of high sensitivity water sensor and amplifying circuit.
The present invention is achieved through the following technical solutions, and comprises metal water logging end of probe two, and one is positive one negative, first Transient Suppression Diode, the first resistance, the first triode, second resistance, single-chip microcomputer treatment circuit exported to by this amplifying circuit, processes water logging signal.
Water logging end of probe of the present invention adopts metal material, when having water to exist between two metal water logging end of probe, owing to there is voltage between two metal water logging end of probe, water is ionized, make the conducting of two metal water logging end of probe, electric current passes through the base stage of the first resistance and the first triode, and then make the extreme and collector terminal conducting of the first triode emission, the extreme voltage of first triode emission becomes high level from low level, this change has been water-soaked two metal water logging end of probe, this circuit set function of sensor and amplifier, can the information of highly sensitive perception water logging, and the signal of the high-impedance state of water logging can be converted to the Transistor-Transistor Logic level that single-chip microcomputer can process.
Water logging end of probe, has two, and one is positive one negative, and wherein positive metal water logging end of probe connects the first resistance, and negative metal water logging end of probe ground connection, water logging end of probe, for contacting the water surface, plays sensor effect.
First resistance, one end connects positive metal water logging end of probe, and the other end connects the first transistor base, for water sensor adjustment of sensitivity.
First triode, this triode is positive-negative-positive structure, is operated on off state, first transistor base connects the first resistance and accesses for water sensor, emitter connects the second resistance, grounded collector, and whether the corresponding metal water logging of the on off operating mode between emitter with collector end of probe is soaked in water.
Second resistance, one end connects 5V power supply, and the emitter that the other end connects the first triode is for limiting the electric current of emitter after triode ON.
First Transient Suppression Diode, one end is connected with the first resistance and positive metal water logging end of probe, other end ground connection, for the electrostatic suppressing metal water logging end of probe to enter into circuit.
The present invention compared with prior art, adopt common electronic devices and components, form simple circuit realiration water logging warning function, whole circuit by two resistance, a Transient Suppression Diode, a triode composition, with low cost, can commercially use in enormous quantities, daily servicing is simple, the life be convenient for people to, reduces unnecessary loss.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, high sensitivity water sensor and amplifying circuit, comprising metal water logging end of probe has two, and one is positive one negative, first Transient Suppression Diode, the first resistance, the first triode, second resistance, single-chip microcomputer treatment circuit exported to by this amplifying circuit, processes water logging signal.
Water logging end of probe of the present invention adopts metal material, when having water to exist between two metal water logging end of probe, owing to there is voltage between two metal water logging end of probe, water is ionized, make the conducting of two metal water logging end of probe, electric current is by the base stage of the first resistance R1 and the first triode Q1, and then make the first triode Q1 emitter terminal and collector terminal conducting, electric current after conducting has R2 to control, the extreme voltage of first triode emission becomes high level from low level, this change has been water-soaked two metal water logging end of probe, this circuit set function of sensor and amplifier, can the information of highly sensitive perception water logging, and the signal of the high-impedance state of water logging can be converted to the Transistor-Transistor Logic level that single-chip microcomputer can process.
Above content is the further description done the present invention in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments drawn under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (6)
1. high sensitivity water sensor and amplifying circuit, is characterized in that: comprise metal water logging end of probe two, and one is positive one negative, first Transient Suppression Diode D1, the first resistance, the first triode, second resistance, single-chip microcomputer treatment circuit exported to by this amplifying circuit, processes water logging signal.
2. high sensitivity water sensor and amplifying circuit according to claim 1, it is characterized in that: comprise metal water logging end of probe two, one is positive one negative, wherein positive metal water logging end of probe connects the first resistance, negative metal water logging end of probe ground connection, water logging end of probe, for contacting the water surface, plays sensor effect.
3. high sensitivity water sensor and amplifying circuit according to claim 1, it is characterized in that: the first resistance, one end connects positive metal water logging end of probe, and other end connecting triode Q1 base stage, for water sensor adjustment of sensitivity.
4. high sensitivity water sensor and amplifying circuit according to claim 1, it is characterized in that: the first triode, this triode is positive-negative-positive structure, be operated on off state, first transistor base connects the first resistance and accesses for water sensor, emitter connects the second resistance, grounded collector, and whether the corresponding metal water logging of the on off operating mode between emitter with collector end of probe is soaked in water.
5. high sensitivity water sensor and amplifying circuit according to claim 1, is characterized in that: the second resistance, and one end connects 5V power supply, and the emitter that the other end connects the first triode is for limiting the electric current of emitter after triode ON.
6. high sensitivity water sensor and amplifying circuit according to claim 1, it is characterized in that: the first Transient Suppression Diode, one end is connected with the first resistance and positive metal water logging end of probe, other end ground connection, for the electrostatic suppressing metal water logging end of probe to enter into circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410583332.7A CN104282121A (en) | 2014-10-28 | 2014-10-28 | High-sensitivity water sensor and amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410583332.7A CN104282121A (en) | 2014-10-28 | 2014-10-28 | High-sensitivity water sensor and amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104282121A true CN104282121A (en) | 2015-01-14 |
Family
ID=52256965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410583332.7A Pending CN104282121A (en) | 2014-10-28 | 2014-10-28 | High-sensitivity water sensor and amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104282121A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896613A (en) * | 2018-04-16 | 2018-11-27 | 华为技术有限公司 | Water logging detection device and method |
| CN110954848A (en) * | 2019-12-17 | 2020-04-03 | 杭州中恒电气股份有限公司 | Fuse wire detection line breakage detection circuit and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483784Y (en) * | 2001-03-30 | 2002-03-27 | 林志伟 | Voice and light prompting unit for wet by urinating |
| GB2368703A (en) * | 2000-06-15 | 2002-05-08 | Terence Martin Pierson | Leak detection system controlling valve to cease liquid flow |
| CN2719273Y (en) * | 2004-02-23 | 2005-08-24 | 马正伟 | Infant piss electronic alarm blanket |
| CN201295326Y (en) * | 2008-08-15 | 2009-08-26 | 季益民 | Music electronic napkin |
| CN202472876U (en) * | 2012-03-02 | 2012-10-03 | 山东交通学院 | Automatic alarm for wetting |
| CN103544816A (en) * | 2012-07-13 | 2014-01-29 | 吴健 | Flowerpot water shortage prompting circuit |
-
2014
- 2014-10-28 CN CN201410583332.7A patent/CN104282121A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2368703A (en) * | 2000-06-15 | 2002-05-08 | Terence Martin Pierson | Leak detection system controlling valve to cease liquid flow |
| CN2483784Y (en) * | 2001-03-30 | 2002-03-27 | 林志伟 | Voice and light prompting unit for wet by urinating |
| CN2719273Y (en) * | 2004-02-23 | 2005-08-24 | 马正伟 | Infant piss electronic alarm blanket |
| CN201295326Y (en) * | 2008-08-15 | 2009-08-26 | 季益民 | Music electronic napkin |
| CN202472876U (en) * | 2012-03-02 | 2012-10-03 | 山东交通学院 | Automatic alarm for wetting |
| CN103544816A (en) * | 2012-07-13 | 2014-01-29 | 吴健 | Flowerpot water shortage prompting circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896613A (en) * | 2018-04-16 | 2018-11-27 | 华为技术有限公司 | Water logging detection device and method |
| CN108896613B (en) * | 2018-04-16 | 2021-06-15 | 华为技术有限公司 | Water immersion detection device and method |
| CN110954848A (en) * | 2019-12-17 | 2020-04-03 | 杭州中恒电气股份有限公司 | Fuse wire detection line breakage detection circuit and method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150114 |