CN101431227A - Digital creepage detection monitoring apparatus - Google Patents
Digital creepage detection monitoring apparatus Download PDFInfo
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- CN101431227A CN101431227A CNA2007101699348A CN200710169934A CN101431227A CN 101431227 A CN101431227 A CN 101431227A CN A2007101699348 A CNA2007101699348 A CN A2007101699348A CN 200710169934 A CN200710169934 A CN 200710169934A CN 101431227 A CN101431227 A CN 101431227A
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Abstract
The invention relates to a digital creepage detecting and monitoring device. A creepage detecting element is arranged in an AC supply circuit; when an outgoing current supplied to a load terminal from a first power supply line is not equal to an incoming current from the load terminal to the AC supply by a second power supply line, that is, an output terminal of the creepage detecting element generates a creepage state signal and the creepage state signal is sent to a microprocessor by a creepage signal processing circuit, so that the microprocessor generates a switch control signal to control a switch unit to switch from a closed-circuit position to a open-circuit position, and the power supplied to the load terminal by the AC supply is cut off. A switch state monitoring circuit is connected with the load terminal in parallel and used for monitoring the switch state in the switch unit, and generates a switch state signal to the microprocessor according to the closed-circuit/open-circuit state of the switch.
Description
Technical field
The present invention is about a kind of power supply power supply state supervising device, particularly about a kind of digital creepage detection monitoring apparatus.
Background technology
The invention of electricity brings us and lives easily, and so the crisis that it hide also makes us can not be ignored, and has what is heard to cause dead and wounded situation because of making electrical appliance in the time of in the life, for this reason, is the emphasis of paying close attention to now for the supervision and the electricity protection mechanism of electricity consumption situation.
In order effectively to control the normal and fail safe of supply of electric power, have that the monitoring of various different electrical power, power supply show, electric power opens circuit different electronic installations such as control, detection of electrical leakage, for example present commercially available power supply display unit can connect the electricity consumption situation of electrical load in order to show it, all magnitudes of voltage, current value, performance number, frequency, power factor, electricity consumption time and the electricity consumption number of degrees etc., the computing that all can see through this device draws, and is shown in a display unit.And existing earth detector major part all adopts the simulation hardware circuit structure, when taking place for electric leakage, detects leakage current by zero current transducer (ZCT) and blocks electric power.
Summary of the invention
The technical problem that institute of the present invention desire solves:
Look about present power supply leakage current detect device on the market; protection mechanism for the electricity consumption situation is all the simulation hardware circuit structure; but the simulation hardware circuit structure has the not good and hardware circuit Yi Chang Time of too high, the mechanical accuracy of cost; can't autodiagnosis and shortcoming such as caution; in the consideration of operability and cost and do not meet economic benefit; therefore, utilize the electricity protection unit of hardware circuit structure to still have it to need improvements.
Therefore, main purpose of the present invention promptly provides a kind of digital creepage detection monitoring apparatus, in order to also to provide power disconnect mechanism just in case the electric leakage situation takes place in the monitoring power electric supply loop in good time.
Another object of the present invention promptly provides a kind of detection supervising device with on off state monitoring function, it can be in order to the state of the switch of switch element in the monitoring ac power supply circuit, and produce at least one switch state signal to this microprocessor according to the open circuit/closed circuit state of this switch, when the creepage detection monitoring apparatus fault, comprise switch, ON-OFF control circuit etc., the exportable alarm signal of switch monitoring function of the present invention is to display unit, represent that this device is unusual, must change or maintenance, so normal with what guarantee to power, safety, and the normal monitoring function of guaranteeing digital creepage detection monitoring apparatus of the present invention.
The technological means that the present invention deals with problems:
The present invention is provided with a leakage current detecting element for solving the technological means that prior art problems adopted in an ac power supply circuit, in order to detect the electric current supply status of this ac power supply circuit, when the whereabouts electric current that is supplied to load end via first power line be not equal to by load end via the second source line be back to AC power return to electric current the time, promptly the output by this leakage current detecting element produces an electric leakage status signal.One microprocessor can receive the electric leakage status signal that this leakage current detecting element is produced via an electric leakage signal treatment circuit.When microprocessor receives the electric leakage status signal that this leakage current detecting element produced, microprocessor produces a switch controlling signal to and is connected in switch element in this ac power supply circuit, make this switch element switch to the open-circuit position, to block the electric power that this AC power is supplied to this load end by closed circuit position.One on off state observation circuit is connected in parallel in this load end, in order to monitoring the state of the switch in this switch element, and produces switch state signal to this microprocessor according to the open circuit/closed circuit state of this switch.
The present invention contrasts the effect of prior art:
Compared to prior art, the present invention effectively provides a kind of digital creepage detection monitoring apparatus, it carries out electric leakage situation in the electric current supply loop with digital circuit technique, to monitor in the supply of electric power loop just in case can provide power disconnect mechanism when the electric leakage situation takes place in good time one.Moreover; the present invention is aided with an on off state observation circuit; can be in order to the state of switch element switch in the monitoring ac power supply circuit; and produce a switch state signal to this microprocessor according to the open circuit/closed circuit state of this switch; microprocessor according to creepage detection monitoring apparatus in normal power supply or abnormal power-down state and on off state monitoring; can this device of autodiagnosis be normal or unusual; if it is unusual; just export an alarm signal to display unit; the user is proposed unusual caution; expression must be changed or maintenance, and is so normal with what guarantee to power; and the normal monitoring function of guaranteeing digital creepage detection monitoring apparatus of the present invention.
Description of drawings
Fig. 1 shows the calcspar of digital creepage detection monitoring apparatus of the present invention;
Fig. 2 shows the preferred embodiment circuit diagram of digital creepage detection monitoring apparatus of the present invention.
100 digital creepage detection monitoring apparatus
1 load end
L1 first power line
L2 second source line
2 leakage current detecting elements
3 electric leakage signal treatment circuits
31 signal amplifiers
32 analog-to-digital converters
4 switch elements
41 first switches
42 second switches
5 ON-OFF control circuit
6 on off state observation circuits
61 comparators
The 61a first input end
61b second input
7 microprocessors
71 display units
72 time-base signal generators
73 electric power reset keys
I1 whereabouts electric current
I2 returns to electric current
The S1 status signal that leaks electricity
The S2 switch controlling signal
The S3 switch state signal
The ACV AC power
Embodiment
Specific embodiment of the present invention will be further described by following embodiment and accompanying drawing.
See also Fig. 1, it shows the calcspar of digital creepage detection monitoring apparatus of the present invention.As shown in Figure 1, digital creepage detection monitoring apparatus 100 of the present invention is linked to the ac power supply circuit that an AC power ACV and a load end 1 are constituted.This ac power supply circuit includes one first a power line L1 and a second source line L2, in order to this load end 1 that supplies power to this AC power ACV.
Consult Fig. 2 simultaneously, it shows the preferred embodiment circuit diagram of digital creepage detection monitoring apparatus of the present invention.As shown in the figure, this digital creepage detection monitoring apparatus 100 includes a leakage current detecting element 2, an electric leakage signal treatment circuit 3, a switch element 4, an ON-OFF control circuit 5, an observation circuit 6, a microprocessor 7.
This leakage current detecting element 2 can adopt general zero current transducer (ZCT) commonly used.This leakage current detecting element 2 is coupled to this first power line L1 and this second source line L2, in order to detect the electric current supply status of this ac power supply circuit, when the whereabouts electric current I 1 that is supplied to load end 1 via the first power line L1 be not equal to by load end 1 via second source line L2 be back to AC power ACV return to electric current I 2 time, promptly the output by this leakage current detecting element 2 produces an electric leakage status signal S1, and, be sent to this microprocessor 7 via after the electric leakage signal treatment circuit 3.
Include a signal amplifier 31 in this electric leakage signal treatment circuit 3, have two inputs, be connected in parallel in the output of this leakage current detecting element 2, in order to amplify this leakage current detecting element 2 detected electric leakage status signal S1.One analog-to-digital converter 32 converts the current value of digital kenel in order to the electric leakage status signal S1 that this leakage current amplifier is amplified, and is sent to this microprocessor 7.
This switch element 4 comprises one first switch 41 and a second switch 42, is connected in series in the first power line L1 and second source line L2 in this ac power supply circuit respectively.The on off state of this first switch 41 and second switch 42 can be controlled via ON-OFF control circuit 5 by the switch controlling signal S2 that this microprocessor 7 produces again.
This on off state observation circuit 6 is connected in parallel in this load end 1, in order to monitoring the state of the switch 41,42 in this switch element 4, and produces a switch state signal S3 to this microprocessor 7 according to the open circuit/closed circuit state of this switch 41,42.This switch state signal S3 is the square-wave signal that changes of the AC current frequency of AC power ACV or is the logical signal of electronegative potential.
Include a comparator 61 in this on off state observation circuit 6, its first input end 61a and the second input 61b are connected in parallel in the first power line L1 and this second source line L2 of this load end 1, and its output is connected to microprocessor 7, and this comparator 61 can be used to detect the voltage condition of delivering to this load end 1.
When first switch 41 and second switch 42 both when all closed circuit, the output of on off state observation circuit 6 presents the a-c cycle of AC power ACV and the square-wave signal that changes, expression has output, this represents the action of two switches normal, when first switch 41 and second switch 42 open circuits, the output of on off state observation circuit 6 presents the low state current potential, the expression no-output, and this also represents the action of two switches normal.The signal of both states, other state represents that promptly one of this switch produces unusual condition except this.This switch state signal S3 can be detected by microprocessor 7.
When the switch 41,42 of this switch element 4 is in closed circuit position, and when this microprocessor 7 detects the electric leakage status signal S1 that this leakage current detecting element 2 produced, this microprocessor 7 will be compared this an electric leakage status signal S1 and a default leakage current set point, when the leakage current value of electric leakage status signal S1 representative during greater than this leakage current set point, this microprocessor 7 promptly can produce a switch controlling signal S2 to this switch element 4, make switch 41,42 open circuits of this switch element 4, to block the electric power that this AC power ACV is supplied to this load end 1.
Microprocessor 7 is connected with a display unit 71, for the moment basic signal generator 72, an electric power reset key 73, but these display unit 71 display operation status signals wherein, on off state that also can the display switch unit.Time-base signal generator 72 can provide for the moment basic signal to this microprocessor 7.Electric power reset key 73 can be in order to the involution operation of control switch unit 4.Receive the electric leakage status signal S1 that this leakage current detecting element 2 produces when microprocessor 7 and after making the switch 41,42 of this switch element 4 switch to the open-circuit position, make this switch element 4 switch to closed circuit position by the open-circuit position involution by the operation of this electric power reset key 73 by closed circuit position.
By the above-mentioned embodiment of the invention as can be known, the value on the true tool industry of the present invention.Only above embodiment explanation only is preferred embodiment explanation of the present invention, all habit in this operator when doing other all improvement and variation according to the above embodiment of the present invention explanation.Yet all improvement and variation that these are done according to the embodiment of the invention are in the claim that still belongs to invention spirit of the present invention and define.
Claims (5)
1. digital creepage detection monitoring apparatus, in an ac power supply circuit, include one first power line and a second source line, the load end that supplies power in order to an AC power is characterized in that described digital creepage detection monitoring apparatus includes:
One microprocessor;
One leakage current detecting element, be coupled to described first power line and second source line, in order to detect the electric current supply status of described ac power supply circuit, when the whereabouts electric current that is supplied to load end via first power line be not equal to by load end via the second source line be back to AC power return to electric current the time, promptly the output by described leakage current detecting element produces an electric leakage status signal;
One electric leakage signal treatment circuit is connected in described leakage current detecting element and described microprocessor, is sent to described microprocessor after treatment in order to the electric leakage status signal that described leakage current detecting element is produced;
One switch element is connected between described AC power and the load end, has a closed circuit position and an open-circuit position;
When described switch element position at closed circuit position, and when microprocessor receives the electric leakage status signal that described leakage current detecting element produced, microprocessor produces a switch controlling signal to described switch element, make described switch element switch to the open-circuit position, to block the electric power that described AC power is supplied to described load end by closed circuit position.
2. digital creepage detection monitoring apparatus as claimed in claim 1, wherein said electric leakage signal treatment circuit comprises:
One signal amplifier has two inputs, is connected in parallel in the output of described leakage current detecting element, in order to amplify the detected electric leakage status signal of described leakage current detecting element;
One analog-to-digital converter converts the current value of digital kenel in order to the electric leakage status signal that described leakage current amplifier is amplified, and is sent to described microprocessor.
3. digital creepage detection monitoring apparatus as claimed in claim 1, more comprise an electric power reset key, receive the electric leakage status signal that described leakage current detecting element produces when described microprocessor and after making described switch element switch to the open-circuit position, make described switch element switch to closed circuit position by the open-circuit position involution by the operation of described electric power reset key by closed circuit position.
4. digital creepage detection monitoring apparatus as claimed in claim 1, more comprise an on off state observation circuit, it has the first input end and second input, be connected in parallel in described load end, be in closed circuit position or open-circuit position in the described switch element in order to monitor, and produce a switch state signal to described microprocessor according to the closed circuit position of described switch element or open-circuit position.
5. digital creepage detection monitoring apparatus as claimed in claim 4, wherein said on off state observation circuit includes:
One comparator, its first input end and second input are connected in parallel in described load end, and its output is connected to microprocessor, delivers to the voltage condition of described load end in order to detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101699348A CN101431227A (en) | 2007-11-08 | 2007-11-08 | Digital creepage detection monitoring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101699348A CN101431227A (en) | 2007-11-08 | 2007-11-08 | Digital creepage detection monitoring apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101431227A true CN101431227A (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101699348A Pending CN101431227A (en) | 2007-11-08 | 2007-11-08 | Digital creepage detection monitoring apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931209A (en) * | 2009-06-23 | 2010-12-29 | 施耐德电器工业公司 | The equipment of signaling electric fault and method, the unit that comprises this equipment and distribution panelboard |
| CN102116813A (en) * | 2009-11-27 | 2011-07-06 | 韦特柯格雷控制***有限公司 | Monitoring of power switching modules |
| CN103675572A (en) * | 2012-09-14 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Electric leakage detector |
| CN103675577A (en) * | 2012-09-18 | 2014-03-26 | 北京中电华大电子设计有限责任公司 | IO reverse leakage detection realizing method and circuit in integrated circuit |
| CN107290615A (en) * | 2016-03-31 | 2017-10-24 | 比亚迪股份有限公司 | A kind of electrical leakage detecting method of electric automobile load |
| CN110121231A (en) * | 2018-02-05 | 2019-08-13 | 瀚云科技有限公司 | Dimmer switch device and its action event judgment method |
| CN110632527A (en) * | 2018-06-01 | 2019-12-31 | 车王电子股份有限公司 | Leakage detection device and battery pack |
| CN110626172A (en) * | 2018-06-01 | 2019-12-31 | 车王电子股份有限公司 | Electric power system of electric bus |
| CN111465867A (en) * | 2017-12-20 | 2020-07-28 | 罗伯特·博世有限公司 | Method for testing an output stage for controlling a load |
-
2007
- 2007-11-08 CN CNA2007101699348A patent/CN101431227A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931209B (en) * | 2009-06-23 | 2016-01-20 | 施耐德电器工业公司 | The equipment of signaling electric fault and method, the unit comprising this equipment and distribution panelboard |
| CN101931209A (en) * | 2009-06-23 | 2010-12-29 | 施耐德电器工业公司 | The equipment of signaling electric fault and method, the unit that comprises this equipment and distribution panelboard |
| CN102116813A (en) * | 2009-11-27 | 2011-07-06 | 韦特柯格雷控制***有限公司 | Monitoring of power switching modules |
| CN102116813B (en) * | 2009-11-27 | 2015-06-03 | 通用电气石油和天然气英国有限公司 | Monitoring of power switching modules |
| CN103675572A (en) * | 2012-09-14 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Electric leakage detector |
| CN103675577B (en) * | 2012-09-18 | 2016-12-21 | 北京中电华大电子设计有限责任公司 | A kind of circuit realizing the detection of IO reverse leakage in integrated circuits |
| CN103675577A (en) * | 2012-09-18 | 2014-03-26 | 北京中电华大电子设计有限责任公司 | IO reverse leakage detection realizing method and circuit in integrated circuit |
| CN107290615A (en) * | 2016-03-31 | 2017-10-24 | 比亚迪股份有限公司 | A kind of electrical leakage detecting method of electric automobile load |
| CN107290615B (en) * | 2016-03-31 | 2019-07-26 | 比亚迪股份有限公司 | A kind of electrical leakage detecting method of electric car load |
| CN111465867A (en) * | 2017-12-20 | 2020-07-28 | 罗伯特·博世有限公司 | Method for testing an output stage for controlling a load |
| CN111465867B (en) * | 2017-12-20 | 2023-09-05 | 罗伯特·博世有限公司 | Method for testing an output stage for controlling a load |
| US11828784B2 (en) | 2017-12-20 | 2023-11-28 | Robert Bosch Gmbh | Method for checking an output stage for controlling a load |
| CN110121231A (en) * | 2018-02-05 | 2019-08-13 | 瀚云科技有限公司 | Dimmer switch device and its action event judgment method |
| CN110632527A (en) * | 2018-06-01 | 2019-12-31 | 车王电子股份有限公司 | Leakage detection device and battery pack |
| CN110626172A (en) * | 2018-06-01 | 2019-12-31 | 车王电子股份有限公司 | Electric power system of electric bus |
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Application publication date: 20090513 |