CN104280091A - Water level detection circuit - Google Patents
Water level detection circuit Download PDFInfo
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- CN104280091A CN104280091A CN201310294236.6A CN201310294236A CN104280091A CN 104280091 A CN104280091 A CN 104280091A CN 201310294236 A CN201310294236 A CN 201310294236A CN 104280091 A CN104280091 A CN 104280091A
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Abstract
The embodiment of the invention discloses a water level detection circuit, which comprises a water level detection circuit and an alarm circuit, wherein the input end of the water level detection circuit is connected with a power supply; the water level detection circuit is used for detecting a water level in a water holding container; when water in the water holding container is higher than or equal to a first preset water level, an optical signal is sent to the alarm circuit by the water level detection circuit; when the water in the water holding container is lower than the first preset water level, the water level detection circuit does not send the optical signal to the alarm circuit; the input end of the alarm circuit is connected with the power supply; when receiving the optical signal, the alarm circuit does not output an alarm signal; when the optical signal is not received by the alarm circuit, the alarm signal is output by the alarm circuit. According to the embodiment of the invention, the accuracy of data during the testing process of instrument equipment can be improved.
Description
Technical field
The present invention relates to circuit field, particularly relate to a kind of water level detection circuit.
Background technology
A lot of instrument and equipment all needs often to add water at present, such as: the instrument such as damp heat box or salt fog cabinet.But user does not often know the situation that in instrument and equipment, water uses in instrument and equipment use procedure, therefore need user frequently to observe and just can know the situation that in instrument and equipment, water uses.And user may forget the situation that in optical viewer equipment, water uses using in instrument and equipment test process, cause lacking in instrument and equipment test cannot be realized, make test data inaccurate.Or user owing to needing to separate the situation that in a part of energy attention equipment, water uses, causes instrument and equipment to be tested and easily makes a fault, make test data inaccurate in use instrument and equipment test process.In sum, the accuracy of current instrument and equipment data in test process is not high.
Summary of the invention
Embodiments provide a kind of water level detection circuit, the accuracy of instrument and equipment data in test process can be improved.
In order to solve the problems of the technologies described above, a kind of water level detection circuit that the embodiment of the present invention provides, described circuit application is in instrument and equipment, and described circuit comprises: water level detection circuit and warning circuit, wherein:
The input end of described water level detection circuit is connected with power supply, described water level detection circuit is for detecting the water level in container filled with water, when the water in described container filled with water higher than or when equaling the first preset water level, described water level detection circuit sends light signal to described warning circuit; When the water in described container filled with water is lower than described first preset water level, described water level detection circuit does not send light signal to described warning circuit;
The input end of described warning circuit is connected with described power supply, described warning circuit is used for when described warning circuit receives described light signal, described warning circuit not output alarm signal, when described warning circuit does not receive described light signal, described warning circuit output alarm signal.
In foregoing circuit, when the water in container filled with water higher than or when equaling the first preset water level, the photoresistance that described water level detection circuit comprises to described warning circuit sends light signal, and warning circuit receives light signal, and warning circuit is output alarm signal not; When the water in described container filled with water is lower than described first preset water level, described water level detection circuit does not send light signal to described warning circuit, output alarm signal when described warning circuit does not receive light signal.Such user just can by so energy be put in testing when testing, and when alarm output alarm, user just can add water, thus can not affect user test, thus can improve the accuracy of instrument and equipment data in test process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of water level detection circuit that the embodiment of the present invention provides;
Fig. 2 is the structural representation of the another kind of water level detection circuit that the embodiment of the present invention provides;
Fig. 3 is the structural representation of the another kind of water level detection circuit that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the another kind of water level detection circuit that the embodiment of the present invention provides;
Fig. 5 is the circuit diagram of a kind of water level detection circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The water level detection circuit that the embodiment of the present invention improves is the circuit in instrument and equipment, and this instrument and equipment can be belong to the instrument and equipment improving water, and namely this instrument and equipment comprises container filled with water, the instrument such as damp heat box or salt fog cabinet.The embodiment of the present invention is not construed as limiting instrument and equipment.
Fig. 1 is the structural representation of a kind of water level detection circuit that the embodiment of the present invention provides, and as shown in Figure 1, comprising: water level detection circuit 11 and warning circuit 12, wherein:
The input end of water level detection circuit 11 is connected with power supply, described water level detection circuit 11 is for detecting the water level in container filled with water, when the water in described container filled with water higher than or when equaling the first preset water level, described water level detection circuit 11 sends light signal to described warning circuit 12; When the water in described container filled with water is lower than described first preset water level, described water level detection circuit 11 does not send light signal to described warning circuit;
The input end of described warning circuit 12 is connected with described power supply, described warning circuit 12 is for when described warning circuit 12 receives described light signal, described warning circuit 12 not output alarm signal, when described warning circuit 12 does not receive described light signal, described warning circuit output alarm signal.
Water level detection circuit 11 specifically can by luminescent device output optical signals such as light emitting diodes, and warning circuit 12 specifically can pass through photoresistance or photodiode receiving optical signals.Above-mentioned alerting signal can be specifically voice signal, such as: the voice signal that warning circuit 12 is exported by the device such as hummer or loudspeaker; Above-mentioned alerting signal can also be specifically light signal, such as: the light signal that warning circuit 12 is exported by light emitting diode etc.; Above-mentioned alerting signal can also be specifically vibration signal, such as: the vibration signal that warning circuit 12 is exported by motor.
When the water in container filled with water higher than or when equaling the first preset water level, water level detection circuit 11 sends light signal to described warning circuit 12, warning circuit 12 receives light signal, warning circuit 12 not output alarm signal, namely the water level in container filled with water normally can safeguard normal test, and at this moment user does not need to add water to instrument and equipment.When the water in described container filled with water is lower than described first preset water level, described water level detection circuit 11 does not send light signal to described warning circuit 12, warning circuit 12 does not receive light signal, warning circuit 12 output alarm signal, at this moment may be that water in container filled with water may not reach instrument and equipment and carries out proper testing, the test data of instrument and equipment may be caused inaccurate, just can add water during the alerting signal that user awareness exports to alarm.
Wherein, above-mentioned first preset water level can be that user is arranged.
In foregoing circuit, when the water in container filled with water higher than or when equaling the first preset water level, the photoresistance that described water level detection circuit comprises to described warning circuit sends light signal, and warning circuit receives light signal, and warning circuit is output alarm signal not; When the water in described container filled with water is lower than described first preset water level, described water level detection circuit does not send light signal to described warning circuit, output alarm signal when described warning circuit does not receive light signal.Such user just can by so energy be put in testing when testing, and when alarm output alarm, user just can add water, thus can not affect user test, thus can improve the accuracy of instrument and equipment data in test process.
Fig. 2 is the structural representation of the another kind of water level detection circuit that the embodiment of the present invention provides, and as shown in Figure 2, comprising: water level detection circuit 21, warning circuit 22, power supply 23 and power sense circuit 24, wherein:
The input end of described water level detection circuit 21 is connected with power supply 23, described water level detection circuit 21 is for detecting the water level in container filled with water, when the water in described container filled with water higher than or when equaling the first preset water level, described water level detection circuit 21 sends light signal to described warning circuit 22; When the water in described container filled with water is lower than described first preset water level, water level detection circuit 21 does not send light signal to described warning circuit 22;
The input end of described warning circuit 22 is connected with described power supply 23, described warning circuit 22 is for when described warning circuit 22 receives described light signal, described warning circuit 22 not output alarm signal, when described warning circuit 22 does not receive described light signal, described warning circuit 22 output alarm signal;
Described power supply 23 can be accumulator;
Described power sense circuit 24 is connected with the positive pole of described power supply 23 and negative pole respectively, described power sense circuit 24 for when detecting voltage that described power supply 23 exports lower than predeterminated voltage, described power sense circuit 24 output optical signal.
Can realize when container filled with water middle water level is lower than the first preset water level like this, alarm 222 is with regard to output alarm signal, and user just can add water to container filled with water.When the voltage that power supply 23 exports is lower than predeterminated voltage, the second light emitting diode 247 that power sense circuit 24 comprises is with regard to output optical signal, and user just can change power supply 23 or charge to power supply 23.
As the optional embodiment of one, as shown in Figure 3, water level detection circuit 21 can also comprise: the first light emitting diode 211, first conducting strip 212, second conducting strip 213 and the first resistance 214, wherein:
Described first conducting strip 212 is connected with the positive pole of described power supply 23, and described first conducting strip 212 is fixed on the described first preset water level place in described container filled with water.
Described second conducting strip 213 is connected with the positive pole of described first light emitting diode 211, and described second conducting strip 213 is fixed on the second preset water level place in described container filled with water, and wherein, described second preset water level is lower than described first preset water level;
Described first resistance 214 one end is connected with the negative pole of described optical diode, the other end ground connection of described first resistance 214;
Light emitting diode 211 for described first conducting strip 212 with described second conducting strip 213 by sending light signal to described warning circuit 22 during water conducting, described light emitting diode 211 is not for sending light signal to described warning circuit 21 when described first conducting strip 212 disconnects with described second conducting strip 213.
When the water level in container filled with water higher than or when equaling the first preset water level, first conducting strip 212 is connected by the water in container filled with water with the second conducting strip 213, namely by the water transmission of electric signals in container filled with water, to make the first light emitting diode 211 output optical signal.When the water level in container filled with water is lower than the first preset water level, first conducting strip 212 just cannot be connected with the second conducting strip 213 by the water in container filled with water, namely the first conducting strip 212 is unglazed carries out transmission of electric signals by water in container filled with water and the second conducting strip 213, cannot to make the first light emitting diode 211 output optical signal, namely the first lighting electrode pipe is in short-circuit condition.
As the optional embodiment of one, warning circuit 22 also comprises: photoresistance 221, alarm 222, second resistance 223, non-gate device 224 and triode 225, wherein:
Photoresistance 221 one end is connected with the positive pole of described power supply 23, and described photoresistance 221 one end other end is by described second resistance 223 ground connection; The input end of described non-gate device 224 is connected to the junction of described photoresistance 221 and described second resistance 223, and the output terminal of described non-gate device 224 is connected with the base stage of described triode 225; The grounded emitter of described triode 225, the collector of described triode 225 is connected with the positive pole of described power supply 23 by described alarm 222;
The light signal that photoresistance 221 sends for receiving water level detection circuit 21;
Alarm 222 for receive described water level detection circuit 21 in photoresistance 221 and send light signal time not output alarm signal, the output alarm signal when photoresistance 221 does not receive the light signal that described water level detection circuit 21 sends.
Such as: when photoresistance 221 receives the light signal of the first light emitting diode 211 output, the resistance of photoresistance 221 diminishes, second resistance 223 points voltage uprise, namely the input end of non-gate device 224 receives high voltage signal, the output terminal of non-gate device 224, with regard to output LOW voltage signal, because the base stage of triode 225 receives low voltage signal, makes triode 225 not conducting, such alarm 222, cannot output alarm signal just for being disconnected.When photoresistance 221 does not receive the light signal of the first light emitting diode 211 output, the resistance of photoresistance 221 increases, second resistance 223 points voltage step-down, namely the input end of non-gate device 224 receives low voltage signal, the output terminal of non-gate device 224, with regard to output HIGH voltage signal, because the base stage of triode 225 receives high voltage signal, makes triode 225 conducting, such alarm 222 just receives electric signal, and output alarm signal.
Wherein, above-mentioned non-gate device 224 can be specifically not circuit or phase inverter.
As the optional embodiment of one, described warning circuit 22 also comprises: the 3rd resistance 226, first voltage stabilizing diode 227, first operational amplifier 228 and the 4th resistance 229, wherein:
The positive input terminal of described first operational amplifier 228 is connected to the junction of described photoresistance 221 and described second resistance 223, and the negative input end of described first operational amplifier 228 is connected with the positive pole of described power supply 23 by described 3rd resistance 226; The negative input end of described first operational amplifier 228 is also connected with the negative pole of described first voltage stabilizing diode 227, the plus earth of described first voltage stabilizing diode 227; The output terminal of described first operational amplifier 228 is connected with the input end of described non-gate device 224.
Such as: when photoresistance 221 receives the light signal of the first light emitting diode 211 output, the resistance of photoresistance 221 diminishes, second resistance 223 points voltage uprise, namely the positive input terminal of the first operational amplifier 228 receives high voltage signal, and this high voltage signal is higher than the reference voltage of the first voltage stabilizing diode 227, namely the voltage of the positive input terminal of the first operational amplifier 228 is higher than the voltage of negative input end, first operational amplifier 228 exports high level signal, the output terminal of non-gate device 224 is with regard to output low level signal, because the base stage of triode 225 receives low voltage signal, make triode 225 not conducting, such alarm 222 is just for being disconnected, cannot output alarm signal.When photoresistance 221 does not receive the light signal of the first light emitting diode 211 output, the resistance of photoresistance 221 increases, second resistance 223 points voltage step-down, namely the positive input terminal of the first operational amplifier 228 receives low voltage signal, and this low voltage signal is lower than the reference voltage of the first voltage stabilizing diode 227, namely the voltage of the positive input terminal of the first operational amplifier 228 is lower than the voltage of negative input end, first operational amplifier 228 output low level signal, namely the input end of non-gate device 224 receives low level signal, the output terminal of non-gate device 224 just exports high level signal, because the base stage of triode 225 receives high level signal, make triode 225 conducting, such alarm 222 just receives electric signal, and output alarm signal.
As the optional embodiment of one, described power sense circuit 24 also comprises: the second light emitting diode 247, the 5th resistance 241, the 6th resistance 242, the 7th resistance 243, second operational amplifier 244, second voltage stabilizing diode 245 and the 8th resistance 246, wherein:
Between the positive pole that described 5th resistance 241 and the 6th resistance 242 are connected in series in described power supply 23 and negative pole; Described 7th resistance 243 one end is connected with the positive pole of described power supply 23, and the other end of described 7th resistance 243 is connected with the negative pole of described second voltage stabilizing diode 245, the plus earth of described second voltage stabilizing diode 245; The positive input terminal of described second operational amplifier 244 is connected to the junction of described 7th resistance 243 and described second voltage stabilizing diode 245, and the negative input end of described second operational amplifier 244 is connected to the junction of described 5th resistance 241 and described 6th resistance 242; One end of described 8th resistance 246 is connected with the output terminal of described second operational amplifier 244, and the other end of described 8th resistance 246 is connected with the positive pole of described second light emitting diode 247, the minus earth of described second light emitting diode 247;
Second light emitting diode 247 for when detecting reference voltage lower than the second voltage stabilizing diode 245 of voltage that described power supply 23 exports, output optical signal.
Such as: when reference voltage lower than the second voltage stabilizing diode 245 of the voltage of the electric signal that power supply 23 that the 7th resistance 243 collects exports, namely power supply 23 export the reference voltage of voltage lower than the second voltage stabilizing diode 245 time, the output terminal high level signal of the second operational amplifier 244, to make the second light emitting diode 247 output optical signal, when the electric signal that power supply 23 that the 7th resistance 243 collects exports voltage higher than or when equaling the reference voltage of the second voltage stabilizing diode 245, namely the voltage that exports of power supply 23 higher than or when equaling the reference voltage of the second voltage stabilizing diode 245, the output terminal low level signal of the second operational amplifier 244, second light emitting diode 247 not output optical signal.
As the optional embodiment of one, as shown in Figure 4, described circuit also comprises: charging circuit 25, wherein:
First output terminal of described charging circuit 25 is connected with the positive pole of described power supply 23, second output terminal of described charging circuit 25 is connected with the negative pole of described power supply 23, the input end of described charging circuit 25 is used for being electrically connected with city, and described charging circuit 25 is for charging to described power supply 23.
When the second light emitting diode 247 output optical signal, user just can be charged to power supply 23 by charging circuit.Wherein, above-mentioned civil power can be specifically alternating current.
As the optional embodiment of one, described circuit also comprises: the first switch 26, wherein:
One end of described first switch 26 is connected with the positive pole of described power supply 23, and the described other end of the first switch 26 is connected with the input end of the input end of described water level detection circuit and described warning circuit 22.
Can be control when user does not use instrument and equipment to test like this, just can disconnect the first switch 26, namely control power supply 23 and do not export electric signal, when user uses instrument and equipment to test, just can close the first switch 26, namely control power supply 23 and do not export electric signal.Thus effectively using electricity wisely.
Optionally implement to have a try as one, described circuit also comprises: second switch 27, wherein:
One end of described second switch 27 connects the positive pole of described power supply 23, and the described other end of second switch 27 is connected with the first output terminal of described charging circuit.
So just can control to use power supply 23 to power to this circuit, the civil power that can also control charging circuit 25 connection is powered to this circuit, such as: the civil power controlling charging circuit 25 connection when second switch 27 disconnects is powered to this circuit, control power supply 23 to power to this circuit when second switch closes 27 conjunction, and power supply 23 is charged.
In foregoing circuit, above embodiment basis on achieve the embodiment of plurality of optional, and the accuracy of instrument and equipment data in test process can be improved.
Fig. 5 is the circuit diagram of the another kind of water level detection circuit that the embodiment of the present invention provides, as shown in Figure 5, conducting strip B is fixed on the first preset water level C place of container filled with water, conducting strip B is connected with battery M positive pole by interrupteur SW 2, conducting strip A is fixed on the second preset water level place of container filled with water, this second preset water level is lower than the first preset water level C, and conducting strip A is connected with the positive pole of LED 1, the minus earth of LED 1; Photoresistance RL one end is connected with interrupteur SW 2, and the other end of photoresistance RL passes through resistance R7 ground connection, the plus earth of voltage stabilizing diode Z1, and the negative pole of voltage stabilizing diode Z1 is connected with interrupteur SW 2 by resistance R6; The positive input terminal of operational amplifier LM358 is connected between photoresistance RL and resistance R7, the negative input end of operational amplifier LM358 is connected to resistance R6 and is connected with voltage stabilizing diode Z1, the output terminal of operational amplifier LM358 is by resistance R5 ground connection, the input end of the output terminal of operational amplifier LM358 also Sheffer stroke gate device CD4069 connects, and the output terminal of non-gate device CD4069 is connected with the base stage of triode VT1; The grounded emitter of triode VT1, the collector of triode VT1 is connected with interrupteur SW 2 by alarm SP; Resistance R2 and resistance R3 is connected in series between interrupteur SW 2 and ground, and resistance R1 and voltage stabilizing diode Z2 is connected in series between interrupteur SW 2 and ground; The positive input terminal of operational amplifier LM358 is connected between resistance R1 and voltage stabilizing diode Z2, the negative input end of operational amplifier LM358 is connected between resistance R2 and resistance R3, the output terminal of operational amplifier LM358 is connected with resistance R4, the other end of resistance R4 is connected with the positive pole of LED 2, the minus earth of LED 2; Battery M positive pole is connected with on electric power connection line E and electric power connection line F by interrupteur SW 1, and electric power connection line E and electric power connection line F charge by being connected power supply (such as: civil power) for battery M.
After pressing interrupteur SW 1 and interrupteur SW 2, electric current flows to conducting strip A through conducting strip B by the conduction property of water, flowing on LED 1, LED 1 luminescence is irradiated on photoresistance RL, photoresistance RL is along with the reduction of illumination resistance, the voltage simultaneously resistance R7 got is higher than voltage stabilizing diode Z1, the 5 pin voltages of operational amplifier LM358 are higher than 6 pin, export high level, due to non-gate device CD4069(such as: not circuit) input high level makes non-gate device CD4069 output low level, the base stage of triode VT is low level, triode VT1 not conducting, alarm SP does not sound.When along with instrument and equipment work, water level slowly declines, when water level is lower than conducting strip B point electrode, conducting strip A and conducting strip B disconnects, that LED 1 is also in short-circuit condition, LED 1 extinguishes, photoresistance RL also loses illumination, the resistance of photoresistance RL obviously increases, the voltage now resistance R7 got is lower than the reference voltage of voltage stabilizing diode Z1, the input 5 pin voltage of operational amplifier LM358 is lower than 6 pin, operational amplifier LM358 output low level, and the input end of non-gate device CD4069 is the low level that LM358 exports, then non-gate device CD4069 exports high level, the base stage of triode VT1 is high level, triode VT1 conducting, alarm SP alert notice tester instrument is in low-water level state, need to add water immediately, also also have a small amount of water supply instrument to use inside instrument simultaneously, instrument also can not be shut down, work on, the accuracy rate of test data can not be affected.
Simultaneously because whole circuit is powered battery, circuit is all low-voltage circuit, all safer, along with battery discharge, when the reference voltage of cell discharge voltage lower than voltage stabilizing diode Z2, when the voltage of namely resistance R3 collection is lower than Z2, (reference voltage of voltage stabilizing diode Z2 is the minimum sparking voltage of battery or protection voltage); Operational amplifier LM358 exports high level, is that LED 2 bright prompting tester battery electric quantity is soon complete, needs to have charged in time to battery.Low water level alarm device is achieved like this by a kind of simple circuit, realize the advantages such as simple and reliable safety, the frequency of the frequent optical viewer water level of the personnel that solve, reduces tester's working strength, improves testing efficiency and the accuracy that improve test data.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a water level detection circuit, described circuit application, in instrument and equipment, is characterized in that, described circuit comprises: water level detection circuit and warning circuit, wherein:
The input end of described water level detection circuit is connected with power supply, described water level detection circuit is for detecting the water level in container filled with water, when the water in described container filled with water higher than or when equaling the first preset water level, described water level detection circuit sends light signal to described warning circuit; When the water in described container filled with water is lower than described first preset water level, described water level detection circuit does not send light signal to described warning circuit;
The input end of described warning circuit is connected with described power supply, described warning circuit is used for when described warning circuit receives described light signal, described warning circuit not output alarm signal, when described warning circuit does not receive described light signal, described warning circuit output alarm signal.
2. circuit according to claim 1, is characterized in that, described water level detection circuit also comprises: the first light emitting diode, the first conducting strip, the second conducting strip and the first resistance, wherein:
Described first conducting strip is connected with the positive pole of described power supply, and described first conducting strip is fixed on the described first preset water level place in described container filled with water;
Described second conducting strip is connected with the positive pole of described first light emitting diode, and described second conducting strip is fixed on the second preset water level place in described container filled with water, and wherein, described second preset water level is lower than described first preset water level;
Described first resistance one end is connected with the negative pole of described optical diode, the other end ground connection of described first resistance;
Described light emitting diode is used for sending light signal by during water conducting to described warning circuit at described first conducting strip and described second conducting strip, and described light emitting diode is used for not sending light signal to described warning circuit when described first conducting strip and described second conducting strip disconnect.
3. as the circuit of claim 1 or 2, it is characterized in that, described warning circuit also comprises: photoresistance, alarm, the second resistance, non-gate device and triode, wherein:
Described photoresistance one end is connected with the positive pole of described power supply, and described photoresistance one end other end is by described second resistance eutral grounding; The input end of described non-gate device is connected to the junction of described photoresistance and described second resistance, and the output terminal of described non-gate device is connected with the base stage of described triode; The grounded emitter of described triode, the collector of described triode is connected with the positive pole of described power supply by described alarm;
The light signal that described photoresistance sends for receiving water level detection circuit;
The not output alarm signal when described photoresistance receives the light signal that described water level detection circuit sends is used for, the output alarm signal when described photoresistance does not receive the light signal that described water level detection circuit sends for described alarm.
4. circuit as claimed in claim 3, it is characterized in that, described warning circuit also comprises: the 3rd resistance, the first voltage stabilizing diode, the first operational amplifier and the 4th resistance, wherein:
The positive input terminal of described first operational amplifier is connected to the junction of described photoresistance and described second resistance, and the negative input end of described first operational amplifier is connected with the positive pole of described power supply by described 3rd resistance; The negative input end of described first operational amplifier is also connected with the negative pole of described first voltage stabilizing diode, the plus earth of described first voltage stabilizing diode; The output terminal of described first operational amplifier is connected with the input end of described non-gate device.
5. circuit as claimed in claim 1 or 2, it is characterized in that, described circuit also comprises: described power supply, wherein:
Described power supply is accumulator.
6. circuit as claimed in claim 5, it is characterized in that, described circuit also comprises: power sense circuit, wherein:
Described power sense circuit is connected with the positive pole of described power supply and negative pole respectively, and described power sense circuit is used for when the voltage detecting the output of described power supply is lower than predeterminated voltage, described power sense circuit output optical signal.
7. circuit as claimed in claim 6, it is characterized in that, described power sense circuit also comprises: the second light emitting diode, the 5th resistance, the 6th resistance, the 7th resistance, the second operational amplifier, the second voltage stabilizing diode and the 8th resistance, wherein:
Between the positive pole that described 5th resistance and the 6th resistant series are connected to described power supply and negative pole; Described 7th resistance one end is connected with the positive pole of described power supply, and the other end of described 7th resistance is connected with the negative pole of described second voltage stabilizing diode, the plus earth of described second voltage stabilizing diode; The positive input terminal of described second operational amplifier is connected to the junction of described 7th resistance and described second voltage stabilizing diode, and the negative input end of described second operational amplifier is connected to the junction of described 5th resistance and described 6th resistance; One end of described 8th resistance is connected with the output terminal of described second operational amplifier, and the other end of described 8th resistance is connected with the positive pole of described second light emitting diode, the minus earth of described second light emitting diode;
Described second light emitting diode is used for when the reference voltage of the voltage detecting the output of described power supply lower than the second voltage stabilizing diode, output optical signal.
8. circuit as claimed in claim 5, it is characterized in that, described circuit also comprises: charging circuit, wherein:
First output terminal of described charging circuit is connected with the positive pole of described power supply, second output terminal of described charging circuit is connected with the negative pole of described power supply, the input end of described charging circuit is used for being electrically connected with city, and described charging circuit is used for charging to described power supply.
9. circuit as claimed in claim 1 or 2, it is characterized in that, described circuit also comprises: the first switch, wherein:
One end of described first switch is connected with the positive pole of described power supply, and the other end of described first switch is connected with the input end of the input end of described water level detection circuit and described warning circuit.
10. circuit as claimed in claim 8, it is characterized in that, described circuit also comprises: second switch, wherein:
One end of described second switch connects the positive pole of described power supply, and the other end of described second switch is connected with the first output terminal of described charging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294236.6A CN104280091A (en) | 2013-07-12 | 2013-07-12 | Water level detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294236.6A CN104280091A (en) | 2013-07-12 | 2013-07-12 | Water level detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104280091A true CN104280091A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310294236.6A Pending CN104280091A (en) | 2013-07-12 | 2013-07-12 | Water level detection circuit |
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| Country | Link |
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| CN (1) | CN104280091A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121019A (en) * | 2017-12-26 | 2018-06-05 | 崔文良 | A kind of prevention waterlogging inspection rainfall real-time monitoring device |
| CN108225474A (en) * | 2017-12-26 | 2018-06-29 | 苏州塔比诺机电有限公司 | A kind of road ponding warning device |
-
2013
- 2013-07-12 CN CN201310294236.6A patent/CN104280091A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121019A (en) * | 2017-12-26 | 2018-06-05 | 崔文良 | A kind of prevention waterlogging inspection rainfall real-time monitoring device |
| CN108225474A (en) * | 2017-12-26 | 2018-06-29 | 苏州塔比诺机电有限公司 | A kind of road ponding warning device |
| CN108121019B (en) * | 2017-12-26 | 2020-10-30 | 湖北一方科技发展有限责任公司 | Rainfall real-time monitoring device for waterlogging prevention inspection |
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Application publication date: 20150114 |