CN209214716U - A kind of water shortage detection circuit device - Google Patents
A kind of water shortage detection circuit device Download PDFInfo
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- CN209214716U CN209214716U CN201821641339.XU CN201821641339U CN209214716U CN 209214716 U CN209214716 U CN 209214716U CN 201821641339 U CN201821641339 U CN 201821641339U CN 209214716 U CN209214716 U CN 209214716U
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- Prior art keywords
- water shortage
- shortage detection
- resistance
- water
- circuit device
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Abstract
The utility model discloses a kind of water shortage detection circuit device, it includes micro-control unit MCU, which is characterized in that I/O port output end and I/O port test side are provided on micro-control unit MCU；The I/O port output end is by being connected in series to water shortage detection line CheckWater with capacitor C1 and resistance R1；The water shortage detection line CheckWater is connected to ground terminal GND by series resistance R2；The I/O port test side is connected to ground terminal GND；The utility model simple and stable structure has saved product cost, while improving water shortage Detection accuracy, solves the problems, such as to change colour at electrode water receiving.
Description
Technical field
The utility model belongs to detection circuit technical field, specially a kind of water shortage detection circuit device.
Background technique
In our daily life, we can be frequently seen atomizer, fish jar, water dispenser, and electric kettle etc. is using
When there is water shortage, and there is no water shortage detection devices inside these many electric appliances, once water shortage is not taken the post as
What protection processing, is easy to burn electric appliance in this way, or even cause fire, great to the personal safety and composition of estate of user
It threatens.Current water shortage detection mode has using I/O port detection mode (such as Fig. 1) there are many kind, there is AD detection mode in the market
(such as Fig. 2), also there are many modes for circuit connection.
Be using the shortcomings that I/O port spilling water detection scheme: 1, the voltage that different MCU identifies low and high level is different；
2, different waters, different water quality, also external environmental factor etc. can all cause the electric conductivity of water different；It 3, cannot be complete
Guarantee that triode is in switch state every time, in amplification, is saturated other states and is likely to.So for three of the above
Problem, if it is simple by I/O port detection low and high level to determine whether spilling water, there is error, can often judge by accident.Then
It is to add a triode, this also increases costs.
Using AD mouthfuls of modes, although the shortcomings that overcoming " erroneous judgement ", the MCU with AD can be more expensive than the MCU without AD, at
Originally it gets higher.
The existing problem of 2 kinds of modes above: power supply line is immersed in water, and has VCC direct current to electrically connect, and can be electrolysed
Water, after working long hours, metal contact color can generate variation on power supply line.
Utility model content
The purpose of this utility model is in view of the above problems, providing a kind of water shortage detection circuit device, its structure is simply steady
It is fixed, product cost is saved, while improving water shortage Detection accuracy, has solved the problems, such as to change colour at electrode water receiving.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of water shortage detection circuit device, it includes
I/O port output end and I/O port test side are provided on micro-control unit MCU, micro-control unit MCU；The I/O port output end passes through
Water shortage detection line is connected in series to capacitor C1 and resistance R1；The water shortage detection line is connected to ground terminal by series resistance R2
GND；The I/O port test side is connected to ground terminal GND.
Further, the capacitor C1 is a kind of 104 capacitors, and its capacitance size is 100000pF.
Further, the resistance value size of the resistance R1 is 10K.
Further, the resistance value size of the resistance R2 is 22K.
The utility model has the beneficial effects that
1, when utility model device works, the circuit structure meeting that triode is set in traditional approach is avoided because ought not
Same water, different water quality, when can all cause the electric conductivity difference of water there are also external environmental factor etc., causing may mistake
On-off situation improves the accuracy rate of water shortage detection.
2, utility model device simple and stable structure does not need setting with AD mouthfuls of MCU device and triode device, is
Product save the cost and be convenient for later maintenance.
3, utility model device is to go to detect by the periodic timing output 1 of MCU, and detection time is short, not when president
Between be powered, so 2 in container electrode contact point, will not electrolysis water, meeting after other circuit works long hours would not occur
Become color phenomenon.
Detailed description of the invention
Fig. 1 is traditional I/O port detection mode schematic diagram.
Fig. 2 is AD mouthfuls of detection mode schematic diagrames of tradition.
Fig. 3 is the electrical block diagram of the utility model.
Fig. 4 is the preferred electrical architecture schematic diagram of the utility model.
In figure: 1, I/O port test side；2, I/O port output end；C1 is capacitor；R1 is resistance；R2 is resistance；Check Water
For water shortage detection line；GND is ground terminal.
Specific embodiment
In order to enable those skilled in the art to better understand the technical solutions of the present invention, with reference to the accompanying drawing to this reality
Be described in detail with novel, the description of this part be only it is exemplary and explanatory, should not be to the protection scope of the utility model
There is any restriction effect.
As Figure 3-Figure 4, the specific structure of the utility model are as follows: a kind of water shortage detection circuit device, it includes micro-control
I/O port output end and I/O port test side are provided on unit MCU processed, micro-control unit MCU；The I/O port output end by with electricity
Hold C1 and resistance R1 and is connected in series to water shortage detection line；The water shortage detection line is connected to ground terminal GND by series resistance R2；
The I/O port test side is connected to ground terminal GND.
Preferably, the capacitor C1 is a kind of 104 capacitors, and its capacitance size is 100000pF.
Preferably, the resistance value size of the resistance R1 is 10K.
Preferably, the resistance value size of the resistance R2 is 22K.
When device works, in Fig. 3, Primary Component is C1 capacitor, and capacitor carries out energy storage.MCU can be spaced and detect whether
Water shortage, first: IO is first exported 1 by MCU, if there is water in container, the high level of IO output can flow through capacitor, by container
Aqueous medium, then flow into GND.To realize to the charging process of capacitor.Then again IO is set as inputting, capacitor is then put
Electricity, forms high voltage on resistance R2, and the IO of MCU reads high level state.If when water shortage, since the other end of capacitor does not have
Water does medium, and electricity does not flow through capacitor, after MCU is set as input, due to out of power releasable on capacitor, IO by R2 resistive pull-downs,
The low level state that the IO of MCU is read.To realize water shortage detection.
Simultaneously as being that the periodic timing output 1 of MCU goes to detect, detection time is short, will not be powered for a long time, so
2 electrode contact points in container, will not electrolysis water, would not occur that color phenomenon can be become after other circuit works long hours.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
Illustrate the method and its core concept for being merely used to help understand the utility model.The above is only the preferred of the utility model
Embodiment, it is noted that due to the finiteness of literal expression, and objectively there is unlimited specific structure, for this technology
For the those of ordinary skill in field, without departing from the principle of this utility model, several improvement, retouching can also be made
Or variation, above-mentioned technical characteristic can also be combined in the right way；These improve retouching, variation or combination, or not
It is improved that the conception and technical scheme of utility model are directly applied into other occasions, it is regarded as the protection of the utility model
Range.
Claims (4)
1. a kind of water shortage detection circuit device, it includes micro-control unit MCU, which is characterized in that is arranged on micro-control unit MCU
There are I/O port output end (2) and I/O port test side (1)；The I/O port output end is scarce by being connected in series to capacitor C1 and resistance R1
Water detection line CheckWater；The water shortage detection line CheckWater is connected to ground terminal GND by series resistance R2；It is described
I/O port test side is connected to ground terminal GND.
2. a kind of water shortage detection circuit device according to claim 1, which is characterized in that the capacitor C1 is one kind 104
Capacitor, and its capacitance size is 100000pF.
3. a kind of water shortage detection circuit device according to claim 1, which is characterized in that the resistance value size of the resistance R1
For 10K.
4. a kind of water shortage detection circuit device according to claim 1, which is characterized in that the resistance value size of the resistance R2
For 22K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641339.XU CN209214716U (en) | 2018-10-10 | 2018-10-10 | A kind of water shortage detection circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821641339.XU CN209214716U (en) | 2018-10-10 | 2018-10-10 | A kind of water shortage detection circuit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209214716U true CN209214716U (en) | 2019-08-06 |
Family
ID=67455690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821641339.XU Active CN209214716U (en) | 2018-10-10 | 2018-10-10 | A kind of water shortage detection circuit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209214716U (en) |
-
2018
- 2018-10-10 CN CN201821641339.XU patent/CN209214716U/en active Active
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