CN204789738U - Early warning electric leakage alarm - Google Patents
Early warning electric leakage alarm Download PDFInfo
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- CN204789738U CN204789738U CN201520546345.7U CN201520546345U CN204789738U CN 204789738 U CN204789738 U CN 204789738U CN 201520546345 U CN201520546345 U CN 201520546345U CN 204789738 U CN204789738 U CN 204789738U
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Abstract
The utility model discloses an early warning electric leakage alarm, including sampling circuit, amplifier circuit, detection circuit, comparison circuit and warning circuit, warning circuit includes buzzer and stand by lamp, comparison circuit includes master module, provides a reference voltage and the 2nd reference voltage that the amplitude is different, relatively the module is coupled in master module and detection circuit, when the peak voltage of detection circuit output is greater than a reference voltage, exports first warning signal, when the peak voltage of detection circuitry output is greater than the 2nd reference voltage, output second warning signal, the executable module is coupled in comparison circuit, when receiving first warning signal, and the work of control buzzer, when receiving the second warning signal, the work of control stand by lamp. Relatively the second warning signal is exported to the module for the buzzer gets the electrician and does, plays a warning effect, reminds abnormal conditions really and informs the user, and is safe more reasonable.
Description
Technical field
The utility model relates to a kind of early warning leakage alarm.
Background technology
Residual current (leakage current) mutual inductor (i.e. mutual inductor) collection can being passed through and need the electrical leakage of Monitoring Line, and electrical leakage is analyzed, compare, sending sound and light alarm when reaching certain predetermined value.
General leakage alarm all comprises following circuit: sample circuit, i.e. the electrical leakage of residual current transformer user acquisition testing circuit; Amplifying circuit, for amplifying electrical leakage; Detecting circuit, keeps the current peak after amplifying; Comparator circuit, arranges a reference voltage, when the crest voltage of current peak equivalence is greater than reference voltage, and output alarm signal; Warning circuit, for reporting to the police.
Such setting, but this alarm is only provided with warning function, if once there is electrical leakage voltage all the time lower than reference voltage, be just difficult to detect abnormal conditions, but if reference value arranged too low, easily causes the situation of false alarm.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of can preventing to cause the sampled voltage in comparator circuit to reduce the actuating equipment disturbance caused because of harmonic wave or current drain.
For achieving the above object, the utility model provides following technical scheme: a kind of early warning leakage alarm, comprises sample circuit, amplifying circuit, detecting circuit, comparator circuit and warning circuit, and described warning circuit comprises hummer and stand by lamp; Described comparator circuit comprises base modules, the first reference voltage providing amplitude different and the second reference voltage; Comparison module, is coupled to base modules and detecting circuit, when the crest voltage that detecting circuit exports is greater than the first reference voltage, exports the first alarm signal; When the crest voltage that testing circuit exports is greater than the second reference voltage, export the second alarm signal; Execution module, is coupled to comparator circuit, when receiving the first alarm signal, controls hummer work, when receiving the second alarm signal, controls stand by lamp work.
The utility model can be set to further: described amplifying circuit comprises the first filtration module, is coupled to the output terminal of sample circuit, for the high frequency spurs in elimination sample rate current; Amplification module, is coupled to the first filtration module, for amplifying sample rate current and exporting.
The utility model can be set to further: described first filtration module comprises the filter resistance and filter capacitor that are arranged in parallel.
The utility model can be set to further: described detecting circuit comprises detection module, is coupled to the output terminal of amplification module, produces one and keeps voltage; Second filtration module, is connected to the output terminal of detection module, keeps the harmonic wave in voltage for elimination.
The utility model can be set to further: described base modules comprises the 6th resistance, the 7th resistance and the 8th resistance that are arranged in series, and the node that described 6th resistance and the 7th resistance couple provides the first reference voltage; The node that described 7th resistance and the 8th resistance couple provides the second reference voltage.
The utility model can be set to further: described 6th resistance is set to adjustable resistance.
The utility model can be set to further: described comparison module arranges the first comparing section and the second comparing section, and described execution module correspondence is provided with the first enforcement division and the second enforcement division, and described first comparing section controls the first enforcement division action; Second comparing section controls the second enforcement division action.
The utility model can be set to further: described first comparing section is configured to the first comparer, described first enforcement division comprises the first diode, NPN pipe and first relay coil, between the base stage that described first diode is connected to a NPN pipe and the output terminal of the first comparer; The emitter of a described NPN pipe is connected to the first relay coil.
The utility model can be set to further: described second comparing section is configured to the second comparer, described second enforcement division comprises the second diode, the 2nd NPN pipe and the second relay coil, between the base stage that described second diode is connected to the 2nd NPN pipe and the output terminal of the second comparer; The emitter of described 2nd NPN pipe is connected to the second relay coil.
By adopting technique scheme, when the electrical leakage voltage that sample circuit produces is greater than the first preset value, comparison module exports the first alarm signal, pilot lamp is made to obtain electric work, play the effect of a warning, now just can by artificial discriminatory analysis concrete condition, when the electrical leakage voltage that sample circuit produces is greater than the second preset value, comparison module exports the second alarm signal, hummer is made to obtain electric work, play a warning effect, really remind abnormal conditions to inform user, safe and reasonable more.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is amplifying circuit and peak-detector circuit schematic diagram;
Fig. 3 is the utility model comparator circuit schematic diagram;
Fig. 4 is the utility model warning circuit schematic diagram.
Reference numeral: 100, sample circuit; 200, amplifying circuit; 210, amplification module; 220, the first filtration module; 300, detecting circuit; 310, detection module; 320, the second filtration module; 400, comparator circuit; 410, base modules; 420, the first comparing section; 421, the second comparing section; 430, the first enforcement division; 431, the second enforcement division; 500, warning circuit.
Embodiment
Referring to figs. 1 through Fig. 4, the utility model embodiment is described further.
With reference to shown in Fig. 1, a kind of early warning leakage alarm, comprises
Sample circuit 100, is set to mutual inductor for responding to the remanent induction current i in detected circuit;
With reference to shown in Fig. 2, amplifying circuit 200, comprises the first filtration module 220, is coupled to the output terminal of sample circuit 100, for the high frequency spurs in elimination sample rate current; Described first filtration module 220 comprises the filter resistance and filter capacitor that are arranged in parallel, and described filter capacitor is set to 0.1uF, and described filter resistance is set to 1K ohm; Amplification module 210, is coupled to the first filtration module 220, for amplifying sample rate current and exporting.Described amplification module 210 comprises the reverse amplification circuit 200 of MCP6004 composition, and gain amplifier is A=R3/R2, and wherein R2 is preferably 200 ohm, and R3 is preferably 1K ohm, and described R4 is preferably 470 ohm, carries out amplification export the sample rate current of input.
With reference to shown in Fig. 3, detecting circuit 300, comprise detection module 310, be coupled to the output terminal of amplification module 210, produce one and keep voltage, comprise the peak-detector circuit 300 be made up of MCP6004, its positive input terminal is connected to the output terminal of amplifying circuit 200, its output terminal is connected to detector diode, and the negative electrode of described detector diode is also coupled to its negative input end; Second filtration module 320, be connected to the output terminal of detection module 310, the harmonic wave in voltage is kept for elimination, comprise the second filter capacitor and the second filter resistance that mutually couple, its node coupled is connected to the negative electrode of detector diode, described second filter resistance is set to 1K ohm, and described second filter capacitor is set to 10uF.
Comparator circuit 400, comprises base modules 410, and base modules comprises the 6th resistance, the 7th resistance and the 8th resistance that are arranged in series, and the node that described 6th resistance and the 7th resistance couple provides the first reference voltage; The node that described 7th resistance and the 8th resistance couple provides the second reference voltage.Described 6th resistance is set to adjustable resistance, its maximum value is set to 1K ohm, and described 7th resistance is set to 470 ohm, and the 8th resistance is set to 1K ohm, arranged by three resistant series and two reference voltages are provided, reduce circuit cost and take volume.
Comparison module arranges the first comparing section 420 and the second comparing section 421, and described execution module correspondence is provided with the first enforcement division 430 and the second enforcement division 431, and described first comparing section 420 controls the first enforcement division 430 action; Second comparing section 421 controls the second enforcement division 431 action.Described first comparing section 420 is configured to the first comparer, and described first enforcement division 430 comprises the first diode, NPN pipe and first relay coil, between the base stage that described first diode is connected to a NPN pipe and the output terminal of the first comparer; The emitter of a described NPN pipe is connected to the first relay coil.Described second comparing section 421 is configured to the second comparer, and described second enforcement division 431 comprises the second diode, the 2nd NPN pipe and the second relay coil, between the base stage that described second diode is connected to the 2nd NPN pipe and the output terminal of the second comparer; The emitter of described 2nd NPN pipe is connected to the second relay coil, first comparing section 420 is set to the first comparer, second comparing section 421 is set to the second comparer, described first comparer and the second comparer are all set to LM355, a NPN pipe and be also provided with total button between power supply high level.
Warning circuit 500, comprises stand by lamp, hummer and the first relay contact and the second relay contact, and control stand by lamp and hummer play multi cue effect respectively.
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 (9)
1. an early warning leakage alarm, comprises sample circuit, amplifying circuit, detecting circuit, comparator circuit and warning circuit, it is characterized in that: described warning circuit comprises hummer and stand by lamp; Described comparator circuit comprises
Base modules, the first reference voltage providing amplitude different and the second reference voltage;
Comparison module, is coupled to base modules and detecting circuit, when the crest voltage that detecting circuit exports is greater than the first reference voltage, exports the first alarm signal; When the crest voltage that testing circuit exports is greater than the second reference voltage, export the second alarm signal;
Execution module, is coupled to comparator circuit, when receiving the first alarm signal, controls hummer work, when receiving the second alarm signal, controls stand by lamp work.
2. a kind of early warning leakage alarm as claimed in claim 1, is characterized in that: described amplifying circuit comprises
First filtration module, is coupled to the output terminal of sample circuit, for the high frequency spurs in elimination sample rate current;
Amplification module, is coupled to the first filtration module, for amplifying sample rate current and exporting.
3. a kind of early warning leakage alarm as claimed in claim 2, is characterized in that: described first filtration module comprises the filter resistance and filter capacitor that are arranged in parallel.
4. a kind of early warning leakage alarm as claimed in claim 3, is characterized in that: described detecting circuit comprises
Detection module, is coupled to the output terminal of amplification module, produces one and keeps voltage;
Second filtration module, is connected to the output terminal of detection module, keeps the harmonic wave in voltage for elimination.
5. a kind of early warning leakage alarm as claimed in claim 1, is characterized in that: described base modules comprises the 6th resistance, the 7th resistance and the 8th resistance that are arranged in series, and the node that described 6th resistance and the 7th resistance couple provides the first reference voltage; The node that described 7th resistance and the 8th resistance couple provides the second reference voltage.
6. a kind of early warning leakage alarm as claimed in claim 5, is characterized in that: described 6th resistance is set to adjustable resistance.
7. a kind of early warning leakage alarm as claimed in claim 6, it is characterized in that: described comparison module arranges the first comparing section and the second comparing section, described execution module correspondence is provided with the first enforcement division and the second enforcement division, and described first comparing section controls the first enforcement division action; Second comparing section controls the second enforcement division action.
8. a kind of early warning leakage alarm as claimed in claim 7, it is characterized in that: described first comparing section is configured to the first comparer, described first enforcement division comprises the first diode, NPN pipe and first relay coil, between the base stage that described first diode is connected to a NPN pipe and the output terminal of the first comparer; The emitter of a described NPN pipe is connected to the first relay coil.
9. a kind of early warning leakage alarm as claimed in claim 7, it is characterized in that: described second comparing section is configured to the second comparer, described second enforcement division comprises the second diode, the 2nd NPN pipe and the second relay coil, between the base stage that described second diode is connected to the 2nd NPN pipe and the output terminal of the second comparer; The emitter of described 2nd NPN pipe is connected to the second relay coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546345.7U CN204789738U (en) | 2015-07-25 | 2015-07-25 | Early warning electric leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546345.7U CN204789738U (en) | 2015-07-25 | 2015-07-25 | Early warning electric leakage alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789738U true CN204789738U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520546345.7U Expired - Fee Related CN204789738U (en) | 2015-07-25 | 2015-07-25 | Early warning electric leakage alarm |
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|---|---|
| CN (1) | CN204789738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132984A (en) * | 2017-04-17 | 2017-09-05 | 湖南工程学院 | One kind is based on typewriting e-command system inside computer keyboard |
-
2015
- 2015-07-25 CN CN201520546345.7U patent/CN204789738U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132984A (en) * | 2017-04-17 | 2017-09-05 | 湖南工程学院 | One kind is based on typewriting e-command system inside computer keyboard |
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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: 20151118 Termination date: 20200725 |