CN217505122U - Water logging sensor device based on voltage comparator - Google Patents
Water logging sensor device based on voltage comparator Download PDFInfo
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- CN217505122U CN217505122U CN202221563068.7U CN202221563068U CN217505122U CN 217505122 U CN217505122 U CN 217505122U CN 202221563068 U CN202221563068 U CN 202221563068U CN 217505122 U CN217505122 U CN 217505122U
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Abstract
The utility model discloses a water sensor device based on voltage comparator relates to the technical field of sensor, and the probe that aims at solving the water sensor among the prior art can not satisfy the problem of complicated scene installation demand. Its technical scheme main points are including water logging rope and voltage comparator, the water logging rope inserts system supply voltage after establishing ties with resistance R23, the one end that resistance R23 and water logging rope are coupled is coupled to the positive input of voltage comparator, voltage comparator's negative pole input access reference voltage, voltage comparator's output is connected to MCU. The utility model discloses a water logging rope replacement probe makes water logging sensor's installation more convenient, has enlarged its use scene.
Description
Technical Field
The utility model belongs to the technical field of the technique of sensor and specifically relates to a water logging sensor device based on voltage comparator is related to.
Background
In places such as data center, communication computer lab, electricity distribution room, power station, warehouse, archives, in case suffer rainwater seepage, the water pipe seepage will bring very big economic loss and potential safety hazard, directly influence people's normal life production. Under the environment that water proofing is necessary for these tasks, the water logging sensor is the first monitoring and early warning equipment for judging whether leakage occurs.
The water sensor is the most direct, simple and effective water leakage detection device. The existing contact type water immersion sensor usually adopts a copper nickel plating probe, and a detection circuit judges whether water exists or not through voltage applied between the two probes. However, uncertainty exists in the installation mode and the installation position of the actual field water sensor, the detection range of the probe is limited, the installation requirement of a complex environment is difficult to meet, and the problem needs to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a water logging sensor device based on voltage comparator uses the combination of voltage comparator and water logging rope, turns into the digital quantity with the analog quantity, and the output result is stable, and the logic is judged accurately.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a water sensor device based on a voltage comparator comprises a water immersion rope and a voltage comparator, wherein the water immersion rope is connected with a resistor R23 in series and then is connected with a system power supply voltage, one end of the resistor R23 coupled with the water immersion rope is coupled to a positive input end of the voltage comparator, a negative input end of the voltage comparator is connected with a reference voltage, and an output end of the voltage comparator is connected to an MCU.
The utility model discloses further set up to: a resistor R24 is coupled between the positive input terminal and the output terminal of the voltage comparator.
The utility model discloses further set up to: one end of the resistor coupled with the water immersion rope is coupled to one end of the bidirectional voltage stabilizing diode, and the other end of the bidirectional voltage stabilizing diode is grounded.
The utility model discloses further set up to: the bidirectional zener diode is connected in parallel with a diode C22.
The utility model discloses further set up to: and a resistor R30 is connected in series between the negative electrode input end of the voltage comparator and the reference voltage, and is grounded through a resistor R31.
The utility model discloses further set up to: and a pull-up resistor is arranged between the output end of the voltage comparator and the MCU.
To sum up, the utility model discloses a beneficial technological effect does:
the water immersion signals collected by the water immersion rope are processed through the voltage comparator and then transmitted to the MCU, the MCU gives out logic judgment to judge whether a water leakage phenomenon occurs, the output result is stable, and the logic judgment is accurate.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a water logging sensor device based on voltage comparator, including water logging rope and voltage comparator, insert 3.3V system supply voltage after water logging rope and resistance R23 establish ties, the one end that resistance R23 and water logging rope are coupled is coupled to voltage comparator's positive input end, and voltage comparator's negative pole input inserts reference voltage, and voltage comparator's output is connected to MCU. In this embodiment, the length of water logging rope sets up according to actual need, and MCU connects prompting devices such as audible-visual annunciator or control center as required equally, makes things convenient for control and maintenance.
A resistor R24 is coupled between the positive input terminal and the output terminal of the voltage comparator.
One end that resistance and water logging rope are coupled is coupled to two-way zener diode one end, and two-way zener diode other end ground connection, and two-way zener diode plays the effect of becoming voltage suppression in the same direction as, is responsible for absorbing static and surge signal on the water logging rope. The bidirectional voltage stabilizing diode is connected with a diode C22 in parallel to play a role in filtering.
A resistor R30 is connected in series between the negative input end of the voltage comparator and the reference voltage, and is grounded through a resistor R31. R30 and R31 form a resistor divider circuit that clamps the reference voltage to a predetermined level as the pull-out threshold voltage signal of the voltage comparator.
And a pull-up resistor is arranged between the output end of the voltage comparator and the MCU.
The resistance value of the water immersion rope in dry air approaches to infinity, and when water wets the water immersion rope, the resistance value is rapidly reduced due to the principle of water conduction. By this characteristic, the utility model discloses a voltage comparator gathers this variable state, handles the water logging signal, obtains and transmits water logging information. A resistor R23 is connected with the water immersion rope in series, and then the system power supply voltage is connected. When water wets the water immersion rope, the resistance of the water immersion rope drops rapidly, and the voltage to earth increases. The system power supply voltage passes through a voltage division circuit, a reference voltage is supplied to the negative electrode input end of the voltage comparator, and the voltage of the water immersion rope is connected to the positive electrode input end of the voltage comparator to serve as an input voltage. When the voltage of the positive input end of the voltage comparator is greater than the reference voltage of the negative input end, the output end of the voltage comparator outputs a high level; when the voltage of the positive input end of the voltage comparator is smaller than the reference voltage of the negative input end, the output end of the voltage comparator outputs low level.
The signal of the output end of the voltage comparator is output to the MCU, and the MCU gives out logic to judge whether the water logging phenomenon occurs or not and then sends out corresponding alarm action according to the water logging phenomenon.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (6)
1. The utility model provides a water sensor device based on voltage comparator which characterized in that: the water logging rope is connected with a resistor R23 in series and then connected to a system power supply voltage, one end of the resistor R23 coupled with the water logging rope is coupled to a positive input end of the voltage comparator, a negative input end of the voltage comparator is connected to a reference voltage, and an output end of the voltage comparator is connected to the MCU.
2. A voltage comparator based water sensor device according to claim 1, wherein: a resistor R24 is coupled between the positive input terminal and the output terminal of the voltage comparator.
3. A voltage comparator based water sensor device according to claim 2, wherein: one end of the resistor coupled with the water immersion rope is coupled to one end of the bidirectional voltage stabilizing diode, and the other end of the bidirectional voltage stabilizing diode is grounded.
4. A voltage comparator based water sensor device according to claim 3, wherein: the bidirectional zener diode is connected in parallel with a diode C22.
5. A voltage comparator based water sensor device according to claim 4, wherein: a resistor R30 is connected in series between the negative electrode input end of the voltage comparator and the reference voltage, and is grounded through a resistor R31.
6. A voltage comparator based water sensor device according to claim 5, wherein: and a pull-up resistor is arranged between the output end of the voltage comparator and the MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221563068.7U CN217505122U (en) | 2022-06-22 | 2022-06-22 | Water logging sensor device based on voltage comparator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221563068.7U CN217505122U (en) | 2022-06-22 | 2022-06-22 | Water logging sensor device based on voltage comparator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217505122U true CN217505122U (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221563068.7U Active CN217505122U (en) | 2022-06-22 | 2022-06-22 | Water logging sensor device based on voltage comparator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217505122U (en) |
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2022
- 2022-06-22 CN CN202221563068.7U patent/CN217505122U/en active Active
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