CN201029003Y - Electric apparatus outer shell creepage monitoring and warning system - Google Patents
Electric apparatus outer shell creepage monitoring and warning system Download PDFInfo
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- CN201029003Y CN201029003Y CNU2007200498652U CN200720049865U CN201029003Y CN 201029003 Y CN201029003 Y CN 201029003Y CN U2007200498652 U CNU2007200498652 U CN U2007200498652U CN 200720049865 U CN200720049865 U CN 200720049865U CN 201029003 Y CN201029003 Y CN 201029003Y
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Abstract
The utility model discloses an electric leakage monitoring and alarm system for the shell of electrical appliances, consisting of an electric leakage detector and a monitoring alarm. The electric leakage detector consists of a leakage voltage detection circuit, an encoded signal generating circuit and a modulation and transmitting circuit, which are connected in sequence; the monitoring alarm consists of a receiving and demodulation circuit, a decoding process circuit and an alarm circuit, which are connected in sequence. The electric leakage detector adopts the wireless communication method to send the electric leakage information of the shell of the electrical appliances to the monitoring alarm, thereby realizeing remote wireless leakage monitoring, saving the construction cost of the system, making the maintenance of the system easier, ensuring the normal transmission of the leakage detection signal; thus the utility model is propitious for the device managing persons to find the leakage situation of the shell timely and conduct maintenance to the electrical apparatus in time.
Description
Technical field
The utility model relates to the equipment that electric equipment electric leakage is monitored, and specifically, relates to a kind of electrical equipment shell leakage current detect and warning system.
Background technology
Along with rapid economy development, power circuit constantly increases, and electric equipment (as electric energy metering box) spreads all over each corner in town and country.Because the distribution of electric equipment is multi-point and wide-ranging, thereby the management maintenance difficulty is big, along with working time, climatic conditions change, and the influence that is subjected to environment of living in, external force, the safety case of electric equipment changes at any time, its safe poor controllability.In order in time to find the electric leakage situation of electrical equipment shell, so that timely repair and maintenance electric equipment, and avoid causing accident of human electric shock and electrical fire accident because of electric leakage, in each field such as electric power, colliery, chemical industry, building widespread use electrical equipment shell leakage current detect and warning system, electric equipment is carried out continuous monitoring.
Existing electrical equipment shell leakage current detect and warning system adopt the wired connection mode more, and earth detector both has been set on electric equipment, by signal transmssion line, earth detector are connected on the monitoring alarm that is arranged in central control room (CCR).Because the distribution of electric equipment is multi-point and wide-ranging, therefore the signal transmssion line number is many, circuit long, the wiring difficulty is big, not only increase the construction cost of system, and easily because of the normal transmission that circuit damages influences the electric leakage detectable signal occurring, may cause transmission to interrupt when serious, so that the apparatus manager can not in time find the electric leakage situation of electrical equipment shell, and can not in time carry out repair and maintenance to electric equipment.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of Wireless electrical appliance device housings leakage current detect and warning system, its earth detector adopts communication that electrical equipment shell electric leakage information is sent to monitoring alarm, can realize the long distance wireless leakage current detect.The technical scheme that adopts is as follows:
A kind of electrical equipment shell leakage current detect and warning system, comprise earth detector and monitoring alarm, it is characterized in that: described earth detector comprises that electrical leakage voltage detection circuit, coded signal produce circuit and modulation and radiating circuit, and electrical leakage voltage detection circuit, coded signal produce circuit and be connected successively with modulation and radiating circuit; Monitoring alarm comprises reception and demodulator circuit, decoding processing circuit and warning circuit, and reception and demodulator circuit, decoding processing circuit are connected successively with warning circuit.The electrical leakage voltage detection circuit produces control signal and produces circuit to coded signal during electric leakage; Coded signal produces circuit and produce the serial code pulse signal that contains address code information under the control of control signal; The emission after modulation and radiating circuit modulation of serial code pulse signal; Reception and demodulator circuit receive the signal that earth detector sends, and obtain serial data signal after demodulation; The decoding processing circuit is handled serial data signal, and compare with the geocoding of decoding processing circuit self, when the geocoding of contained geocoding of serial data signal and decoding processing circuit self is consistent, decoding processing circuit output alarm enabling signal; Warning circuit starts under the control of warning enabling signal, sends alerting signal.
Preferred above-mentioned electrical leakage voltage detection circuit comprises electric leakage power circuit, rectification circuit, optocoupler and amplifying circuit, and electric leakage power circuit, rectification circuit, optocoupler are connected successively with amplifying circuit; The electric leakage power circuit connects the input port of rectification circuit; The output port of rectification circuit connects the elementary luminotron of optocoupler, and wherein the malleation output terminal of rectification circuit connects the positive pole of elementary luminotron, and the negative pressure output terminal of rectification circuit connects the negative pole of elementary luminotron; The input end of the secondary and amplifying circuit of optocoupler is connected, and the control signal that the output terminal of amplifying circuit produces the electrical leakage voltage detection circuit flows to coded signal and produces circuit.The electric leakage power circuit is connected with electrical equipment shell; When electric leakage took place electrical equipment shell, the electric leakage power circuit collected electrical leakage voltage, and flows to rectification circuit; Rectification circuit is converted to DC voltage with alternating voltage, is applied on the elementary luminotron of optocoupler, makes elementary luminotron conducting, luminous, the also conducting of the inferior utmost point of optocoupler at this moment, and outputs level signals is to amplifying circuit; Amplifying circuit zooms into high level signal with the level signal of the inferior utmost point output of optocoupler, flows to coded signal as control signal and produces circuit.Amplifying circuit can be made of one-level operational amplifier or multi-stage operational amplifier.
Preferred above-mentioned coded signal produces circuit and comprises that electronic switching circuit, coded signal produce integrated circuit and group address numbering is selected wire jumper; The input end of electronic switching circuit is connected with the output terminal of electrical leakage voltage detection circuit, output terminal is connected with the startup pin that coded signal produces integrated circuit; Address number selects wire jumper to be connected with the code value input pin that coded signal produces integrated circuit, and the serial code pulse signal output pin that coded signal produces integrated circuit is connected with modulation and radiating circuit.Address number selects wire jumper to be used for determining the geocoding (geocoding to should earth detector address information) of earth detector, and the code value input pin that this address code information produces integrated circuit by coded signal is offered coded signal produces integrated circuit; When electric leakage takes place in electrical equipment shell, the electrical leakage voltage detection circuit produces control signal, under the control of this control signal, the electronic switching circuit conducting also starts coded signal generation integrated circuit, coded signal produces the serial code pulse signal that integrated circuit produces the address code information that contains earth detector, offers modulation and radiating circuit.
In order to make the apparatus manager can find the electric leakage situation of electric equipment, in time fix a breakdown, eliminate safe hidden trouble, simultaneously to giving a warning through the people around the faulty equipment, people are away from faulty equipment in prompting, ensure public safety, above-mentioned earth detector also comprises electric leakage alarm device, this electric leakage alarm device comprises the electric leakage power circuit, rectification circuit, mu balanced circuit, stable multi-oscillation circuit and alerting signal output circuit, the output terminal of electric leakage power circuit connects the input end of rectification circuit, the output terminal of rectification circuit connects the input end of mu balanced circuit, the output terminal of mu balanced circuit connects the input end of stable multi-oscillation circuit, and the output terminal of stable multi-oscillation circuit connects the input end of alerting signal output circuit.The electric leakage power circuit is connected with electrical equipment shell; During electric leakage, the alternating current of electric leakage power circuit after the mu balanced circuit voltage stabilizing, is converted to direct current through the rectification circuit rectification, provides stable low-voltage to the stable multi-oscillation circuit, and stable multi-oscillation circuit control alerting signal output circuit is reported to the police.Can connect a filter capacitor at the output terminal of mu balanced circuit, the voltage that mu balanced circuit is exported carries out filtering, offers the stable multi-oscillation circuit again.Preferred above-mentioned rectification circuit is a full-wave rectifying circuit; Mu balanced circuit is a voltage stabilizing diode; The alerting signal output circuit comprises at least one light emitting diode or at least one loudspeaker, perhaps comprises at least one light emitting diode and at least one loudspeaker simultaneously.Electric leakage alarm device can with the shared electric leakage power circuit of electrical leakage voltage detection circuit.
Preferred above-mentioned decoding processing circuit comprises three-state address coding integrated circuit, three-state address coding integrated circuit is handled serial data signal, and compare with self geocoding, when the contained geocoding of serial data signal is consistent with the geocoding of three-state address coding integrated circuit self, three-state address coding integrated circuit output alarm enabling signal.
Above-mentioned warning circuit can be luminous warning circuit or audible alarm circuit, or luminous warning circuit and the common circuit of forming of sound warning circuit.
Common luminous warning circuit adopts light emitting diode as luminescent device, also can adopt bulb or other luminescent device, and illuminating circuit is a technology commonly used in the prior art, at this luminous warning circuit is not described in detail.
Preferred tut warning circuit comprises warning and delaying circuit, alarm sound source circuit, audio amplifier circuit and pronunciation device, warning and delaying circuit, alarm sound source circuit, audio amplifier circuit are connected successively with pronunciation device, wherein warning and delaying circuit can obtain the Realtime Alerts enabling signal and this real-time enabling signal is carried out delay process from the decoding processing circuit, the output of warning and delaying circuit can trigger the alarm sound source circuit, the sound signal of alarm sound source circuit output drives pronunciation device work after audio amplifier circuit amplifies.Pronunciation device can be loudspeaker, piezoelectric ceramic piece etc.
Earth detector adopts communication that electrical equipment shell electric leakage information is sent to monitoring alarm in the utility model, realizes the long distance wireless leakage current detect.Owing to needn't between earth detector and monitoring alarm, lay signal transmssion line, therefore can save the construction cost of system, and be easier to system is safeguarded, guarantee the to leak electricity normal transmission of detectable signal, help the electric leakage situation that the apparatus manager in time finds electrical equipment shell, and in time electric equipment is carried out repair and maintenance.
Description of drawings
Fig. 1 is the structured flowchart of the utility model preferred embodiment;
Fig. 2 is the circuit theory diagrams of the utility model preferred embodiment earth detector;
Fig. 3 is the circuit theory diagrams of the utility model preferred embodiment monitoring alarm.
Embodiment
As shown in Figure 1, this electrical equipment shell leakage current detect and warning system comprise earth detector and monitoring alarm, wherein earth detector comprises that electrical leakage voltage detection circuit 1, coded signal produce circuit 2 and modulation and radiating circuit 3, and electrical leakage voltage detection circuit 1, coded signal produce circuit 2 and be connected successively with modulation and radiating circuit 3; Monitoring alarm comprises reception and demodulator circuit 4, decoding processing circuit 5 and warning circuit 6, and reception and demodulator circuit 4, decoding processing circuit 5 and warning circuit 6 are connected successively.
As shown in Figure 2, above-mentioned electrical leakage voltage detection circuit 1 comprises electric leakage power circuit 11, rectification circuit 12, optocoupler IC1 and amplifying circuit 13, and electric leakage power circuit 11, rectification circuit 12, optocoupler IC1 are connected successively with amplifying circuit 13; Electric leakage power circuit 11 connects the input port of rectification circuit 12; The output port of rectification circuit 12 connects the elementary luminotron of optocoupler IC1, and wherein the malleation output terminal of rectification circuit 12 connects the positive pole of elementary luminotron, and the negative pressure output terminal of rectification circuit 12 connects the negative pole of elementary luminotron; The input end of the secondary and amplifying circuit 13 of optocoupler IC1 is connected, and the control signal that the output terminal of amplifying circuit 13 produces electrical leakage voltage detection circuit 1 flows to coded signal and produces circuit 2.Electric leakage power circuit 11 is connected with electrical equipment shell 7, when electric leakage takes place in electrical equipment shell 7, electric leakage power circuit 11 collects electrical leakage voltage, and flow to rectification circuit 12 and carry out rectification, Test Switchboard K wherein is used for the test of earth detector, Test Switchboard K is connected electrical equipment shell 7 during work with an input end of rectification circuit 12, and Test Switchboard K is connected civil power phase line N during test with an input end of rectification circuit 12, and another input end of rectification circuit 12 is connected with zero line T; Electric leakage power circuit 11 also comprises decompression capacitor C11, and decompression capacitor C11 is connected between another input end of zero line T and rectification circuit 12; Rectification circuit 12 mainly is made of diode D21, and alternating voltage is converted to DC voltage, is applied on the elementary luminotron of optocoupler IC1, makes elementary luminotron conducting, luminous, the also conducting of the inferior utmost point of optocoupler IC1 at this moment, and outputs level signals is to amplifying circuit 13; Amplifying circuit 13 comprises induced signal processing integrated circuit IC2 (model is BIS0001), contain two-level operating amplifier in this integrated circuit, the level signal of the inferior utmost point output of optocoupler IC1 is amplified through first utmost point operational amplifier, signal after the amplification is from the 16 pin output of induced signal processing integrated circuit IC2, through resistance, be capacitively coupled to 13 pin of induced signal processing integrated circuit IC2, amplify again through second utmost point operational amplifier, obtain high-level control signal, high-level control signal is flowed to coded signal as control signal and is produced circuit 2 by the 2 pin output of induced signal processing integrated circuit IC2.Resistance R 5, R6, R7 and wire jumper JP1 are used for the adjustment of amplifier gain in the amplifying circuit 13.
Coded signal produces circuit 2 and comprises that electronic switching circuit, coded signal produce integrated circuit (IC) 3 (model is HX2262) and group address numbering is selected wire jumper JP3, comprises that also one group of earth detector numbering is provided with wire jumper JP2 (JP2 is used for distinguishing the warning orientation); Electronic switching circuit is made up of resistance R 9 and triode Q1, its input end is connected with the output terminal (being 2 pin of induced signal processing integrated circuit IC2) of electrical leakage voltage detection circuit 1, output terminal is connected with the startup pin (i.e. 14 pin) that coded signal produces integrated circuit (IC) 3, and electronic switching circuit is subjected to the 2 foot control systems of induced signal processing integrated circuit IC2; Address number selects wire jumper JP3 to be connected with the code value input pin (being the 1-8 pin) that coded signal produces integrated circuit (IC) 3, and the serial code pulse signal output pin (i.e. 17 pin) that coded signal produces integrated circuit (IC) 3 is connected with modulation and radiating circuit 3.Address number selects wire jumper JP3 to be used for determining the geocoding (geocoding to should earth detector address information) of earth detector, and the code value input pin (being the 1-8 pin) that this address code information produces integrated circuit (IC) 3 by coded signal is offered coded signal produces integrated circuit (IC) 3; The earth detector numbering is provided with the orientation that wire jumper JP2 is used for determining earth detector, and one group of earth detector of same geocoding can have four, and these four residing orientation of earth detector connect definite by the different wire jumpers of JP2.When electric leakage takes place in electrical equipment shell 7,2 pin of induced signal processing integrated circuit IC2 produce high-level control signal, under the control of this control signal, triode Q1 conducting, 14 pin that coded signal produces integrated circuit (IC) 3 become low level, coded signal produces integrated circuit (IC) 3 and starts working, the warning bearing data position of JP2 correspondence and the serial code pulse signal of JP3 corresponding address coded data bit are represented in the 17 pin output that produces integrated circuit (IC) 3 from coded signal, offer modulation and radiating circuit 3 after isolating by R10.LED 1 is formed condition indication circuit with resistance R 8, and LED 1 was luminous when coded signal produced integrated circuit (IC) 3 work.
Modulation and radiating circuit 3 belong to technology commonly used in the prior art, are not described in detail at this, and as shown in Figure 2, modulation and radiating circuit 3 are modulated to the received signal, and the signal after the modulation is by antenna ANT1 emission.
Also be provided with power circuit 8 in the earth detector, power circuit 8 mainly is made up of transformer T2, rectification circuit D3 and three-terminal voltage-stabilizing pipe IC5, for earth detector provides voltage stable working power, belongs to circuit common, is not described in detail at this.
In order to make the apparatus manager can find the electric leakage situation of electric equipment, in time fix a breakdown, eliminate safe hidden trouble, simultaneously to giving a warning through the people around the faulty equipment, people are away from faulty equipment in prompting, ensure public safety, above-mentioned earth detector also comprises electric leakage alarm device 9, this electric leakage newspaper is shot a glance at device 9 and is comprised electric leakage power circuit 11 (electric leakage alarm device 9 and electrical leakage voltage detection circuit 1 a shared electric leakage power circuit 11), rectification circuit D1, voltage stabilizing diode D2, stable multi-oscillation IC circuit 4 and alerting signal output circuit, the output terminal of electric leakage power circuit 11 connects the output terminal of rectification circuit D1, the output terminal of rectification circuit D1 connects the two ends of voltage stabilizing diode D2, voltage stabilizing diode D2 filter capacitor C12 in parallel, the two ends of voltage stabilizing diode D2 connect the input end of stable multi-oscillation IC circuit 4, and the output terminal of stable multi-oscillation IC circuit 4 connects the input end of alerting signal output circuit.After alternating current (producing between electrical equipment shell 7 and the zero line T) the process rectification circuit D1 rectification of electric leakage power supply, the voltage stabilizing diode D2 voltage stabilizing, be converted to direct current, filter capacitor C12 carries out filtering to the voltage of voltage stabilizing diode D2 output, provide stable low-voltage to stable multi-oscillation IC circuit 4, stable multi-oscillation IC circuit 4 control alerting signal output circuits are reported to the police.The alerting signal output circuit comprises LED 2, LED3 and loudspeaker B, and LED 2, loudspeaker B, LED 3 are connected successively, and LED 2 during warning, LED3 are luminous, and loudspeaker B sends alarm sound simultaneously.
Reception and demodulator circuit 4 belong to technology commonly used in the prior aries, are not described in detail at this.As shown in Figure 3, the signal that is received by receiving antenna ANT2 is through receiving and demodulator circuit 4 demodulation and amplify shaping, meet the serial data signal of decoding processing circuit 5 requirements to decoding processing circuit 5 from output terminal (be 1 pin of U01, two amplifiers of U01 inside can be formed the amplifier of the two-stage different gains) output amplitude and the waveform of amplification and rectification circuit.
Audible alarm circuit 62 comprises warning and delaying circuit 621, alarm sound source circuit 622, audio amplifier circuit 623 and pronunciation device, and warning and delaying circuit 621, alarm sound source circuit 622, audio amplifier circuit 623 are connected successively with pronunciation device.
Warning and delaying circuit 621 can obtain the Realtime Alerts enabling signal and this real-time enabling signal is carried out delay process from decoding processing circuit 5, to prolong time of fire alarming.Warning and delaying circuit 621 is made up of integrated circuit U3 (model is LM358) and peripheral circuit thereof, forms voltage comparator by U3A, U3B (U3A and U3B form integrated circuit U3), and its 2 pin, 6 pin are reference potential, by R27, the R28 intrinsic standoff ratio decision to power supply.At ordinary times, because the 3 pin current potentials of U3A are lower than 2 pin, 1 pin output low level, diode D015 ends, and the 5 pin current potentials of U3B are lower than 6 pin, 7 pin output low levels.After receiving alerting signal, be added in 3 pin of U3A from the encode high level of 17 pin output of integrated circuit U 1 of three-state address, when this voltage is higher than the voltage of 2 pin, 1 pin output high level, diode D015 conducting is charged to capacitor C 7, and capacitor C 7 is charged to supply voltage rapidly; When the 5 pin voltages of U3B were higher than inverting input 6 pin, 7 pin output high level triggered the alarm sound source circuit and makes it work.Even come since encode 17 pin of integrated circuit U 1 of three-state address be instantaneous high level (being the instantaneous high level of U3A output), the 5 pin voltages of U3B can not disappear immediately yet, but by R30, U3B discharge, begin to help slowly and reduce, when 5 pin voltages are lower than 6 pin, 7 pin are got back to low level, and this time period is time of fire alarming.AN1, AN2 are the manual emergency alarm switch, press voltage that AN1 can make capacitor C 7 and are charged to supply voltage immediately and report to the police; AN2 is the alarm release switch, presses AN2 and can immediately the voltage on the capacitor C 7 be released and take off, and making reports to the police stops.
Alarm sound source circuit 622 is made up of soft encapsulation music integrated circuit U4, triode Q6, wherein Q6 is an electronic switch, high level triggers, when 7 pin of integrated circuit U3 are exported high level, triode Q6 conducting, the sound signal among the soft encapsulation music integrated circuit U4 is through capacitor C 5, resistance R 24 send audio amplifying circuits 623.
Audio amplifier circuit 623 is made up of triode Q4, triode Q5, self coupling step-up transformer B1, potentiometer W1 etc., and pronunciation device is piezoelectric ceramic piece BZ1; Triode Q4, Q5 form complex pipe Class C biased amplifier; Self coupling step-up transformer B1 is convenient to piezoelectric ceramic piece BZ1 coupling; Potentiometer W1 can adjust the input range of sound signal, is used for doing the volume adjustment.The sound signal of warning sounding circuit 622 outputs drives piezoelectric ceramic piece BZ1 work during work after audio amplifier circuit 623 amplifies, and sends alarm sound.
Also be provided with power circuit 10 in the monitoring alarm, power circuit 10 mainly is made up of transformer T1, rectification circuit D01-D04 and three-terminal voltage-stabilizing pipe U2, for monitoring alarm provides voltage stable working power, belongs to circuit common, is not described in detail at this.
Claims (8)
1. electrical equipment shell leakage current detect and warning system, comprise earth detector and monitoring alarm, it is characterized in that: described earth detector comprises that electrical leakage voltage detection circuit, coded signal produce circuit and modulation and radiating circuit, and electrical leakage voltage detection circuit, coded signal produce circuit and be connected successively with modulation and radiating circuit; Monitoring alarm comprises reception and demodulator circuit, decoding processing circuit and warning circuit, and reception and demodulator circuit, decoding processing circuit are connected successively with warning circuit.
2. electrical equipment shell leakage current detect according to claim 1 and warning system, it is characterized in that: described electrical leakage voltage detection circuit comprises electric leakage power circuit, rectification circuit, optocoupler and amplifying circuit, and electric leakage power circuit, rectification circuit, optocoupler are connected successively with amplifying circuit; The electric leakage power circuit connects the input port of rectification circuit; The output port of rectification circuit connects the elementary luminotron of optocoupler, and wherein the malleation output terminal of rectification circuit connects the positive pole of elementary luminotron, and the negative pressure output terminal of rectification circuit connects the negative pole of elementary luminotron; The input end of the secondary and amplifying circuit of optocoupler is connected, and the control signal that the output terminal of amplifying circuit produces the electrical leakage voltage detection circuit flows to coded signal and produces circuit.
3. electrical equipment shell leakage current detect according to claim 1 and warning system is characterized in that: described coded signal produces circuit and comprises that electronic switching circuit, coded signal produce integrated circuit and group address numbering is selected wire jumper; The input end of electronic switching circuit is connected with the output terminal of electrical leakage voltage detection circuit, output terminal is connected with the startup pin that coded signal produces integrated circuit; Address number selects wire jumper to be connected with the code value input pin that coded signal produces integrated circuit, and the serial code pulse signal output pin that coded signal produces integrated circuit is connected with modulation and radiating circuit.
4. according to claim 1-3 each described electrical equipment shell leakage current detect and warning system, it is characterized in that: described earth detector also comprises electric leakage alarm device, this electric leakage alarm device comprises the electric leakage power circuit, rectification circuit, mu balanced circuit, stable multi-oscillation circuit and alerting signal output circuit, the output terminal of electric leakage power circuit connects the input end of rectification circuit, the output terminal of rectification circuit connects the input end of mu balanced circuit, the output terminal of mu balanced circuit connects the input end of stable multi-oscillation circuit, and the output terminal of stable multi-oscillation circuit connects the input end of alerting signal output circuit.
5. electrical equipment shell leakage current detect according to claim 4 and warning system, it is characterized in that: described alerting signal output circuit comprises at least one light emitting diode or at least one loudspeaker, perhaps comprises at least one light emitting diode and at least one loudspeaker simultaneously.
6. electrical equipment shell leakage current detect according to claim 1 and warning system is characterized in that: described decoding processing circuit comprises three-state address coding integrated circuit.
7. electrical equipment shell leakage current detect according to claim 1 and warning system is characterized in that: described warning circuit is luminous warning circuit or audible alarm circuit, or luminous warning circuit and the common circuit of forming of sound warning circuit.
8. electrical equipment shell leakage current detect according to claim 7 and warning system, it is characterized in that: described audible alarm circuit comprises warning and delaying circuit, the alarm sound source circuit, audio amplifier circuit and pronunciation device, warning and delaying circuit, the alarm sound source circuit, audio amplifier circuit is connected successively with pronunciation device, wherein warning and delaying circuit can obtain the Realtime Alerts enabling signal and this real-time enabling signal is carried out delay process from the decoding processing circuit, the output of warning and delaying circuit can trigger the alarm sound source circuit, the sound signal of alarm sound source circuit output drives pronunciation device work after audio amplifier circuit amplifies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200498652U CN201029003Y (en) | 2007-04-02 | 2007-04-02 | Electric apparatus outer shell creepage monitoring and warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200498652U CN201029003Y (en) | 2007-04-02 | 2007-04-02 | Electric apparatus outer shell creepage monitoring and warning system |
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| CN201029003Y true CN201029003Y (en) | 2008-02-27 |
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| CNU2007200498652U Expired - Fee Related CN201029003Y (en) | 2007-04-02 | 2007-04-02 | Electric apparatus outer shell creepage monitoring and warning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI418806B (en) * | 2011-01-12 | 2013-12-11 | Chunghwa Telecom Co Ltd | Radio intelligent inductive AC current measurement notification device |
| CN108051692A (en) * | 2017-12-03 | 2018-05-18 | 国网江西省电力有限公司南昌供电分公司 | Electrical appliance enclosure ground fault detection locating alarm device |
| CN110007186A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of detection of electrical leakage remote alarming device and method |
| CN110297156A (en) * | 2019-08-15 | 2019-10-01 | 山东凌宝智能科技有限公司 | A kind of circuit and method by electrical leakage voltage detection electric leakage |
-
2007
- 2007-04-02 CN CNU2007200498652U patent/CN201029003Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI418806B (en) * | 2011-01-12 | 2013-12-11 | Chunghwa Telecom Co Ltd | Radio intelligent inductive AC current measurement notification device |
| CN108051692A (en) * | 2017-12-03 | 2018-05-18 | 国网江西省电力有限公司南昌供电分公司 | Electrical appliance enclosure ground fault detection locating alarm device |
| CN110007186A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of detection of electrical leakage remote alarming device and method |
| CN110007186B (en) * | 2019-04-23 | 2021-11-16 | 彭明 | Electric leakage detection remote alarm device and method |
| CN110297156A (en) * | 2019-08-15 | 2019-10-01 | 山东凌宝智能科技有限公司 | A kind of circuit and method by electrical leakage voltage detection electric leakage |
| CN110297156B (en) * | 2019-08-15 | 2024-04-05 | 山东凌宝智能科技有限公司 | Circuit and method for detecting electric leakage through electric leakage voltage |
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Granted publication date: 20080227 Termination date: 20100402 |