CN204758847U - Rainwater sensor circuit - Google Patents
Rainwater sensor circuit Download PDFInfo
- Publication number
- CN204758847U CN204758847U CN201520384230.2U CN201520384230U CN204758847U CN 204758847 U CN204758847 U CN 204758847U CN 201520384230 U CN201520384230 U CN 201520384230U CN 204758847 U CN204758847 U CN 204758847U
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- coupled
- comparer
- power supply
- heating wire
- output terminal
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Abstract
The utility model discloses a rainwater sensor circuit keeps the problem that can make capacitive sensor's sensitivity receive the influence in order to solve the rainwater for a long time on the pick -up plate, it is simple to aim at providing a circuit structure, the easy manufacturing to can effectively improve the rainwater sensor circuit of the life and the degree of accuracy, its technical scheme main points are including power supply unit, pick -up plate, reference voltage portion, comparator, control part and heater, the pick -up plate is coupled in the opposition end of comparator and is coupled in power supply unit one end other end ground connection through a resistance, the homophase end of comparator is coupled the portion in reference voltage, and the output is coupled in the control part for outlet driving signal, the control part is coupled to be used for receiving drive signal and to respond drive signal in the heater and makes the heater circular telegram, the heater sets up and is used for heating for the pick -up plate bottom the pick -up plate. The utility model is suitable for a rainwater detection circuitry technical field of capacitanc.
Description
Technical field
The utility model relates to a kind of capacitive rainwater testing circuit technical field, and more particularly, it relates to a kind of rain sensor circuit.
Background technology
Rain sensor or rain sensor are applicable to the relevant departments such as observatory's (station), hydrometric station, agricultural, national defence and are used for remote measurement liquid quantity of precipitation, precipitation intensity, precipitation beginning and ending time.Observing and predicting station for automatic system of hydrological data acquisition and transmission, automatically field for the purpose of flood control, scheduling of supplying water, the management of hydropower reservoir station regimen, is Rainfall estimation sensor.At present, the rain sensor on market is divided into optical sensor and capacitive rain quantity sensor.Optical sensor is according to the refraction principle work of light.Capacitance type sensor, the principle that the rainwater of capacitive rain quantity sensor utilization is different with the dielectric constant of glass is made, this circuit is fairly simple relative to optical profile type, but because raindrop long-time reservation on capacitance type sensor easily damages detecting element, the sensitivity of capacitance type sensor can be able to be made to be affected due to the long-time reservation of rainwater simultaneously, rainwater can not rapid evaporation, the plank resting on check-out console for a long time due to rainwater again makes plank be corroded or is oxidized, place in moist environment and can impact circuit, can make to break down in use procedure, so need to make further improvements existing capacitive rain sensor circuit.
Utility model content
For the deficiency that prior art exists, it is simple that the purpose of this utility model is to provide a kind of circuit structure, easily manufactures, and effectively can improve the rain sensor circuit of serviceable life and accuracy.
For achieving the above object, the utility model provides following technical scheme: a kind of rain sensor circuit, comprises power supply unit, check-out console, reference voltage portion, comparer, control part and heating wire;
Described heating wire is arranged at bottom check-out console in order to heat to check-out console;
One end of described check-out console is coupled to the end of oppisite phase of comparer and is coupled to power supply unit by a resistance, whether there is rainwater and output detections signal, the other end ground connection of described check-out console to detect;
Described reference voltage portion is coupled to the in-phase end of comparer, in order to provide reference voltage;
The output terminal output drive signal of described comparer;
Described control part is coupled to the output terminal of comparer to receive drive singal, and exports control signal;
Described heating wire is coupled to control part with reception control signal and responsive control signal makes heating wire work.
Preferably, described power supply unit provides the first power supply and second source, and described first power supply is connected with heating wire, and described second source is connected with reference voltage portion.
Preferably, described control part comprises NPN triode, relay and biasing resistor;
One end of described biasing resistor is connected with the output terminal of comparer, and the other end is connected with the base stage of NPN triode;
The collector of described NPN triode is coupled to coil one end of relay, and the other end of the coil of described relay is coupled to the first power supply;
The grounded emitter of described NPN triode;
One end of the normally opened contact of described relay is connected with the first power supply, and the other end is connected with heating wire, the other end ground connection of described heating wire.
Preferably, the coil of described relay is parallel with the second LED and active buzzer.
Preferably, also go here and there diode between the output terminal of described comparer and biasing resistor, the anode of described diode is coupled to the output terminal of comparer, and negative electrode is coupled to biasing resistor.
Preferably, the output terminal in described reference voltage portion is coupled with voltage follower, and the output terminal of described voltage follower couples ground connection after one first LED.
Compared with prior art, the beneficial effects of the utility model are: check-out console is coupled to the end of oppisite phase of comparer and is coupled to power supply unit one end by a resistance, other end ground connection, the in-phase end of comparer is coupled to reference voltage portion, and output terminal is coupled to control part, described control part is coupled to heating wire, described heating wire is arranged at bottom check-out console in order to heat to check-out console, rainwater is checked by check-out console, when rainwater drops on check-out console, the dielectric constant of electric capacity will change, be equivalent to rainwater and make capacitance short-circuit, now check-out console output terminal output low level signal, and reference voltage portion exports high level signal, compared by comparer, then export the drive singal of high level, making control part accept drive singal makes resistance wire switch on power, because resistance wire is that the bottom being arranged at check-out console just can be heated for check-out console, make rainwater energy rapid evaporation, avoid the plank resting on check-out console for a long time due to rainwater making plank be corroded or being oxidized, place moist environment to impact to circuit or when being used on equipment equipment.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model rain sensor circuit embodiments;
Fig. 2 is the circuit diagram of the power supply unit of the utility model rain sensor circuit embodiments.
In figure 1, power supply unit; 11, the first power supply; 12, second source; 13, three terminal regulator; 2, check-out console; 3, reference voltage portion; 4, comparer; 5, control part; 51, NPN triode; 52, relay; 53, biasing resistor; 6, heating wire; 7, the second LED; 8, active buzzer; 9, voltage follower.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model rain sensor circuit embodiments is described further.
A kind of rain sensor circuit, comprises power supply unit 1, check-out console 2, reference voltage portion 3, comparer 4, control part 5 and heating wire 6; Described heating wire 6 is arranged at bottom check-out console 2 in order to heat to check-out console 2; One end of described check-out console 2 is coupled to the end of oppisite phase of comparer 4 and is coupled to power supply unit 1 by a resistance, whether there is rainwater and output detections signal, the other end ground connection of described check-out console 2 to detect; Described reference voltage portion 3 is coupled to the in-phase end of comparer 4, in order to provide reference voltage; The output terminal output drive signal of described comparer 4; Described control part 5 is coupled to the output terminal of comparer 4 to receive drive singal, and exports control signal; Described heating wire 6 is coupled to control part 5 with reception control signal and responsive control signal makes heating wire 6 work.
Check-out console 2 is pcb board, is provided with multiple conductor above, forms capacitive rain detector part, applies this capacitance principle, can realize the presence or absence detection of rainwater.
Check with or without rainwater by check-out console 2, when rainwater drops on check-out console 2, the dielectric constant of electric capacity will change, be equivalent to rainwater and make capacitance short-circuit, now check-out console 2 output terminal output low level signal, and reference voltage portion 3 exports high level signal, reference voltage portion 3 provides reference voltage by resistance R20 and resistance R21 by the mode of dividing potential drop, compared by comparer 4, then export the drive singal of high level, making control part 5 accept drive singal makes resistance wire switch on power, because resistance wire is that the bottom being arranged at check-out console 2 just can be heated for check-out console 2, make rainwater energy rapid evaporation, avoid the plank resting on check-out console 2 for a long time due to rainwater making plank be corroded or being oxidized, place moist environment to impact to circuit or when being used on equipment equipment.
As shown in Figure 2, power supply unit 1 provides the first power supply 11 and second source 12, and described first power supply 11 is connected with heating wire 6, and described second source 12 is connected with reference voltage portion 3.Three terminal regulator 13 is coupled with between described first power supply 11 and second source 12.Plug J1 connects external power source, the voltage VCC of the first power supply 11 connected is 12V, is played the effect of filtering and voltage stabilizing, by three terminal regulator 13 by the first electric capacity C1, make the first power supply 11 voltage transition be the voltage 2.5V of second source 12, the model of three terminal regulator 13 is TL431.Supply voltage is lower, and power dissipation ratio is lower, and does not have impact to human body, and make in the process manufactured safer, because be weakness, human body can not get an electric shock.
As shown in Figure 1, control part 5 comprises NPN triode 51, relay 52 and biasing resistor 53; Described biasing resistor 53 one end is connected with the output terminal of comparer 4, and the other end is connected with the base stage of NPN triode; The collector of described NPN triode 51 is coupled to coil one end of relay 52, grounded emitter; Another of the coil of described relay 52 is coupled to the first power supply 11, and one end of relay 52 normally opened contact is connected with the first power supply 11, and the other end connects rear ground connection by heating wire 6.The drive singal exported by comparer 4 makes the conducting of NPN triode, thus makes relay 52 coil obtain electric, is switched on power by heating wire 6 simultaneously, and heating wire 6 work makes the rainwater on check-out console 2 be subject to thermal evaporation.
The coil of relay 52 is parallel with the second LED 7 and active buzzer 8.When relay 52 works time, the second LED 7 and active buzzer 8 are also connected simultaneously, make the second LED 7 luminous, second LED 7 is green, there is the function of instruction, user can be allowed to know the running status of relay 52, also convenient for maintaining personnel are to the judgement of fault, clearly can judge whether it is relay 52 fault when conveniently breaking down.Hummer sounding alarm when rain, can notify user's rain simultaneously.
Also go here and there diode between the output terminal of comparer 4 and biasing resistor 53, the anode of described diode is coupled to the output terminal of comparer 4, and negative electrode is coupled to biasing resistor 53.In order to make circuit working more stable and reliable, preventing comparer 4U1A output current perfusion in the other direction, comparer 4 is damaged, making direction of current keep outbound course by anti-reverse diode, effectively improve reliability and the serviceable life of circuit.
The output terminal in reference voltage portion 3 is coupled with voltage follower 9, and the output terminal of described voltage follower couples ground connection after one first LED.First LED is yellow, and whether have instruction reference voltage and normally work, user conveniently distinguishes whether the duty of circuit is stablized.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a rain sensor circuit, is characterized in that: comprise power supply unit, check-out console, reference voltage portion, comparer, control part and heating wire;
Described heating wire is arranged at bottom check-out console in order to heat to check-out console;
One end of described check-out console is coupled to the end of oppisite phase of comparer and is coupled to power supply unit by a resistance, whether there is rainwater and output detections signal, the other end ground connection of described check-out console to detect;
Described reference voltage portion is coupled to the in-phase end of comparer, in order to provide reference voltage;
The output terminal output drive signal of described comparer;
Described control part is coupled to the output terminal of comparer to receive drive singal, and exports control signal;
Described heating wire is coupled to control part with reception control signal and responsive control signal makes heating wire work.
2. rain sensor circuit according to claim 1, is characterized in that: described power supply unit provides the first power supply and second source, described first power supply is connected with heating wire, and described second source is connected with reference voltage portion.
3. rain sensor circuit according to claim 2, is characterized in that: described control part comprises NPN triode, relay and biasing resistor;
One end of described biasing resistor is connected with the output terminal of comparer, and the other end is connected with the base stage of NPN triode;
The collector of described NPN triode is coupled to coil one end of relay, and the other end of the coil of described relay is coupled to the first power supply;
The grounded emitter of described NPN triode;
One end of the normally opened contact of described relay is connected with the first power supply, and the other end is connected with heating wire, the other end ground connection of described heating wire.
4. rain sensor circuit according to claim 3, is characterized in that: the coil of described relay is parallel with the second LED and active buzzer.
5. rain sensor circuit according to claim 4, is characterized in that: also go here and there diode between the output terminal of described comparer and biasing resistor, and the anode of described diode is coupled to the output terminal of comparer, and negative electrode is coupled to biasing resistor.
6. rain sensor circuit according to claim 5, is characterized in that: the output terminal in described reference voltage portion is coupled with voltage follower, and the output terminal of described voltage follower couples ground connection after one first LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520384230.2U CN204758847U (en) | 2015-06-04 | 2015-06-04 | Rainwater sensor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520384230.2U CN204758847U (en) | 2015-06-04 | 2015-06-04 | Rainwater sensor circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204758847U true CN204758847U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520384230.2U Expired - Fee Related CN204758847U (en) | 2015-06-04 | 2015-06-04 | Rainwater sensor circuit |
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| Country | Link |
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| CN (1) | CN204758847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422759A (en) * | 2017-06-21 | 2017-12-01 | 山东英楷隆科技发展有限公司 | A kind of anti-oxidant rainfall snowfall sensor of low temperature |
-
2015
- 2015-06-04 CN CN201520384230.2U patent/CN204758847U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422759A (en) * | 2017-06-21 | 2017-12-01 | 山东英楷隆科技发展有限公司 | A kind of anti-oxidant rainfall snowfall sensor of low temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180604 |