CN204256541U - Low-water alarm circuit - Google Patents
Low-water alarm circuit Download PDFInfo
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- CN204256541U CN204256541U CN201420637618.4U CN201420637618U CN204256541U CN 204256541 U CN204256541 U CN 204256541U CN 201420637618 U CN201420637618 U CN 201420637618U CN 204256541 U CN204256541 U CN 204256541U
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- alarm circuit
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Abstract
The utility model discloses low-water alarm circuit, comprise timer U, loudspeaker Y and power vd D, timer U comprises 8 pins, be respectively pin one, pin two, pin 3, pin 4, pin 5, pin 6 pin 7, pin 8, one end of loudspeaker Y is connected to power vd D, also comprise resistance R1, resistance R2, resistance R3 and resistance R4, one end of resistance R1 connects power vd D, the other end contact resistance R2 of resistance R1, also comprise two probe S, one of them probe S is connected between resistance R1 and resistance R2, another probe S is connected to the emitter of triode T.The utility model adopts said structure, and whole warning circuit structure can be made simple, and the components and parts power consumption used is less, by the acting in conjunction of timer and triode, has accomplished to control comparatively accurately.
Description
Technical field
The utility model relates to water-level alarm field, is specifically related to a kind of low-water alarm circuit.
Background technology
When different, when water level is below or above warning line, all can bring certain harm, need water level alarm to detect in real time water level for this reason.Water level alarm is the warning being carried out water level by the method for mechanical type or magnetic induction, can be reported to the police control starting or stoping of the equipment such as water pump simultaneously by audible-visual annunciator or magnetic.Water level alarm is reported to the police by electronic level switch or float switch, the principle of electronic level switch is detected water level by electronic probe, by water level detecting special chip, the signal detected is processed again, when fluid to be measured arrives operating point, export high or low level signal, then hydrous water level controller, output relay switching signal, or directly power supply is to alarm, thus realize the warning function to liquid level; The principle of float switch is by the fluctuate magnetic reed switch that attract pole inner band have tongue tube of inside with ring-shaped magnet ball float water level at any time, sends switch alarm signal.
At present, various water level alarm is tinkling of jades to meet the eye on every side, but totally all there are some problems, such as, water level alarm structure relative complex, warning sensitivity is not high.
Utility model content
The purpose of this utility model is to provide low-water alarm circuit, solves current low water alarm structure relative complex, and components and parts power consumption is comparatively large, and the problem that warning sensitivity is not high.
The utility model for achieving the above object, realizes by the following technical solutions:
Low-water alarm circuit, comprise timer U, loudspeaker Y and power vd D, described timer U comprises 8 pins, be respectively pin one, pin two, pin 3, pin 4, pin 5, pin 6 pin 7, pin 8, one end of loudspeaker Y is connected to power vd D, is connected to pin 3, the pin one ground connection of described timer U after other end serial connection polar capacitor C1, pin two is connected in series with pin 6, and pin 3 and pin 8 are connected to power vd D;
Also comprise resistance R1, resistance R2, resistance R3 and resistance R4, one end of described resistance R1 connects power vd D, the other end contact resistance R2 of resistance R1, one end of described resistance R3 connects power vd D, one end of the other end contact resistance R4 of resistance R3, the other end of resistance R4 is connected to the pin 6 of timer U, and the pin 7 of timer U is connected between resistance R3 and resistance R4;
Also comprise electric capacity C2 and C3, the pin 6 of a termination timer U of described electric capacity C2, other end ground connection, the pin 5 of a termination timer U of described electric capacity C3, other end ground connection;
Also comprise triode T, the base stage of described triode T is connected with resistance R2, and collector is connected with pin 6, grounded emitter;
Also comprise two probe S, one of them probe S is connected between resistance R1 and resistance R2, and another probe S is connected to the emitter of triode T.
Further, preferably, the model of described timer U is NE555.
Further, preferably, the resistance of described resistance R1 is 200K Ω, and the resistance of the resistance of resistance R2 to be the resistance of 300 K Ω, resistance R3 be 1 K Ω, resistance R4 is 100 K Ω.
Further, preferably, the capacitance of the capacitance of described polar capacitor C1 to be the capacitance of 4.7 μ F, electric capacity C2 be 0.01 μ F, electric capacity C3 is 0.01 μ F.
Further, preferably, the model of described triode T is 3DG9011.
Further, preferably, the resistance of described loudspeaker Y is 5 ~ 80 Ω.
Further, preferably, the output voltage of described power vd D is+6 ~ 12V.
The utility model compared with prior art, has the following advantages and beneficial effect: when the S that pops one's head in soaks in water, triode T conducting, and electric capacity C2 is shorted, and electric capacity C2 and resistance R4 can not form oscillator signal, and loudspeaker is sounding not; When water level is too low, probe S is exposed to outside the water surface, and triode T ends, electric capacity C2 is not shorted, and electric capacity C2 and resistance R4 forms oscillator signal, and is input in timer U by pin two, the corresponding outputting oscillation signal of pin 3 of timer U, and make loudspeaker Y send alarm sound.Whole warning circuit structure is simple, and the components and parts power consumption used is less, by the acting in conjunction of timer and triode, has accomplished to control comparatively accurately.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment:
As shown in Figure 1, low-water alarm circuit described in the present embodiment, comprise timer U, loudspeaker Y and power vd D, timer U comprises 8 pins, and be respectively pin one, pin two, pin 3, pin 4, pin 5, pin 6 pin 7, pin 8, one end of loudspeaker Y is connected to power vd D, pin 3 is connected to after other end serial connection polar capacitor C1, the pin one ground connection of timer U, pin two is connected in series with pin 6, and pin 3 and pin 8 are connected to power vd D;
The present embodiment also comprises resistance R1, resistance R2, resistance R3 and resistance R4, one end of described resistance R1 connects power vd D, the other end contact resistance R2 of resistance R1, one end of described resistance R3 connects power vd D, one end of the other end contact resistance R4 of resistance R3, the other end of resistance R4 is connected to the pin 6 of timer U, and the pin 7 of timer U is connected between resistance R3 and resistance R4;
The present embodiment also comprises electric capacity C2 and C3, the pin 6 of a termination timer U of described electric capacity C2, other end ground connection, the pin 5 of a termination timer U of described electric capacity C3, other end ground connection;
The present embodiment also comprises triode T, and the base stage of described triode T is connected with resistance R2, and collector is connected with pin 6, grounded emitter;
The present embodiment also comprises two probe S, and one of them probe S is connected between resistance R1 and resistance R2, and another probe S is connected to the emitter of triode T.
The principle of work of the present embodiment: when the S that pops one's head in soaks in water, triode T conducting, electric capacity C2 is shorted, and electric capacity C2 and resistance R4 can not form oscillator signal, and loudspeaker is sounding not; When water level is too low, probe S is exposed to outside the water surface, and triode T ends, electric capacity C2 is not shorted, and electric capacity C2 and resistance R4 forms oscillator signal, and is input in timer U by pin two, the corresponding outputting oscillation signal of pin 3 of timer U, and make loudspeaker Y send alarm sound.
The model that the components and parts related in the present embodiment are selected or parameter as follows:
Timer U:NE555;
Resistance R1:200K Ω, resistance R2:300 K Ω, resistance R3:1 K Ω, resistance R4:100 K Ω;
Polar capacitor C1:4.7 μ F, electric capacity C2:0.01 μ F, electric capacity C3:0.01 μ F;
Triode T:3DG9011;
Loudspeaker Y:5 ~ 80 Ω;
Power vd D:+6 ~ 12V.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection domain of the present utility model.
Claims (7)
1. low-water alarm circuit, it is characterized in that: comprise timer U, loudspeaker Y and power vd D, described timer U comprises 8 pins, be respectively pin one, pin two, pin 3, pin 4, pin 5, pin 6 pin 7, pin 8, one end of loudspeaker Y is connected to power vd D, is connected to pin 3, the pin one ground connection of described timer U after other end serial connection polar capacitor C1, pin two is connected in series with pin 6, and pin 3 and pin 8 are connected to power vd D;
Also comprise resistance R1, resistance R2, resistance R3 and resistance R4, one end of described resistance R1 connects power vd D, the other end contact resistance R2 of resistance R1, one end of described resistance R3 connects power vd D, one end of the other end contact resistance R4 of resistance R3, the other end of resistance R4 is connected to the pin 6 of timer U, and the pin 7 of timer U is connected between resistance R3 and resistance R4;
Also comprise electric capacity C2 and C3, the pin 6 of a termination timer U of described electric capacity C2, other end ground connection, the pin 5 of a termination timer U of described electric capacity C3, other end ground connection;
Also comprise triode T, the base stage of described triode T is connected with resistance R2, and collector is connected with pin 6, grounded emitter;
Also comprise two probe S, one of them probe S is connected between resistance R1 and resistance R2, and another probe S is connected to the emitter of triode T.
2. low-water alarm circuit according to claim 1, is characterized in that: the model of described timer U is NE555.
3. low-water alarm circuit according to claim 1, is characterized in that: the resistance of described resistance R1 is 200K Ω, and the resistance of the resistance of resistance R2 to be the resistance of 300 K Ω, resistance R3 be 1 K Ω, resistance R4 is 100 K Ω.
4. low-water alarm circuit according to claim 1, is characterized in that: the capacitance of the capacitance of described polar capacitor C1 to be the capacitance of 4.7 μ F, electric capacity C2 be 0.01 μ F, electric capacity C3 is 0.01 μ F.
5. low-water alarm circuit according to claim 1, is characterized in that: the model of described triode T is 3DG9011.
6. low-water alarm circuit according to claim 1, is characterized in that: the resistance of described loudspeaker Y is 5 ~ 80 Ω.
7. low-water alarm circuit according to claim 1, is characterized in that: the output voltage of described power vd D is+6 ~ 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420637618.4U CN204256541U (en) | 2014-10-30 | 2014-10-30 | Low-water alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420637618.4U CN204256541U (en) | 2014-10-30 | 2014-10-30 | Low-water alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256541U true CN204256541U (en) | 2015-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420637618.4U Expired - Fee Related CN204256541U (en) | 2014-10-30 | 2014-10-30 | Low-water alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204256541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270996A (en) * | 2017-07-13 | 2017-10-20 | 厦门芯阳科技股份有限公司 | A kind of water level detection circuit and device |
-
2014
- 2014-10-30 CN CN201420637618.4U patent/CN204256541U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270996A (en) * | 2017-07-13 | 2017-10-20 | 厦门芯阳科技股份有限公司 | A kind of water level detection circuit and device |
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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 |
Granted publication date: 20150408 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |