CN107132431A - Plug residual voltage test device and method of testing - Google Patents
Plug residual voltage test device and method of testing Download PDFInfo
- Publication number
- CN107132431A CN107132431A CN201610109812.9A CN201610109812A CN107132431A CN 107132431 A CN107132431 A CN 107132431A CN 201610109812 A CN201610109812 A CN 201610109812A CN 107132431 A CN107132431 A CN 107132431A
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- Prior art keywords
- plug
- residual voltage
- voltage
- power supply
- lines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention provides a kind of plug residual voltage test device and method of testing, wherein, the plug residual voltage test device includes：Power supply, for providing power supply for tested plug；Zero cross detection circuit, is connected with power supply, for detecting whether the current voltage provided to be tested plug of power supply reaches peak value or valley；Dump part, is connected with power supply and zero cross detection circuit, for being detected in zero cross detection circuit in the case that the voltage that power supply currently provides for tested plug reaches peak value or valley, cuts off the electricity supply；Voltage detecting circuit, for detecting that power supply was disconnected after the scheduled time, is tested residual voltage value between any two in L lines, N lines and the E lines of plug.The present invention, which is solved, to be needed repeatedly to plug in the prior art plug and could realize complex operation caused by residual voltage measurement, and the inaccurate technical problem of test result has reached the technique effect of simple Accurate Determining plug residual voltage.
Description
Technical field
The present invention relates to electric circuit inspection technical field, test and fill in particular to a kind of plug residual voltage
Put and method of testing.
Background technology
Remaining residual voltage refers to pulling out the instantaneous of plug with the equipment that plug connects power supply, by device interior
Energy-storage travelling wave tube produce the residual voltage being present between each pin.If human body touch to plug and
The voltage is more than a certain limit value, will produce Danger Electric shock risk.Formulate remaining residual voltage, the limit of dump energy
Value is that the moment for being placed on power-off touches band in order to protect the personal safety of operator or other staff
Electric part and cause danger.Therefore, the remaining residual voltage tool of detection device has very important significance exactly.
The national safety standard of household electrical appliance is：1 second moment of the household electrical appliance after attaching plug extraction,
Residual voltage value between each pole of plug not should be greater than 34V, and require to need in power supply in test
The crest and trough of sine wave disconnect.
At present, in test mostly be to look for crest and trough by repeatedly plug plug, and rely on
Oscillograph carrys out test voltage value, and this mode is complex, and accuracy is than relatively low.
In view of the above-mentioned problems, not yet proposing effective solution at present.
The content of the invention
The embodiments of the invention provide a kind of plug residual voltage test device, inserted for simply detecting exactly
The residual voltage of head, the plug residual voltage test device includes：
Power supply, for providing power supply for tested plug；Zero cross detection circuit, is connected with the power supply,
Whether the voltage currently provided for detecting the power supply for the tested plug reaches peak value or paddy
Value；Dump part, is connected with the power supply and the zero cross detection circuit, in the mistake
Zero voltage that is currently provided to the power supply for the tested plug of detection electric circuit inspection reach peak value or
In the case of person's valley, cut off the electricity supply；Point control circuit is tested, for realizing the tested plug
The selection and control of magnitude of voltage in L lines, N lines and E lines between any two；Voltage detecting circuit, is used
It is disconnected in the detection power supply after the scheduled time, in L lines, N lines and the E lines of the tested plug
Residual voltage value between any two.
In one embodiment, the dump part includes：IGBT.
In one embodiment, above-mentioned plug residual voltage test device also includes：Display unit, with institute
State voltage detecting circuit to be connected, for showing the residual voltage value that the voltage detecting circuit is detected.
In one embodiment, above-mentioned plug residual voltage test device also includes：Laser-emitting diode, with
The voltage detecting circuit is connected, and the residual voltage value for being detected in the voltage detecting circuit is more than pre-
If in the case of voltage threshold, carrying out alarm indication.
In one embodiment, above-mentioned plug residual voltage test device also includes：Timer, it is and described
Dump part is connected with the voltage detecting circuit, by since the power supply be cut off when based on
When, after the scheduled time is reached, trigger the voltage detecting circuit and carry out residual voltage value detection.
In one embodiment, the test point control circuit includes：Control chip and multiple relays
Device, wherein, the control chip is controlled by the break-make to the multiple relay, realizes the quilt
Survey the selection and control of the magnitude of voltage in L lines, N lines and the E lines of plug between any two.
In one embodiment, above-mentioned plug residual voltage test device also includes：Current detection circuit,
Loop current for detecting the plug residual voltage test device in real time, and detecting the loop electricity
In the case that stream exceeds predetermined current threshold, the power supply is cut off.
The embodiment of the present invention additionally provides a kind of residual by above-mentioned plug residual voltage test device progress plug
The method for pressing test, this method includes：
Tested plug is connected in the plug residual voltage test device；Set the parameter needed for test；Control
The break-make of power supply processed, the residual voltage to the tested plug is detected.
In one embodiment, the parameter needed for the test includes at least one of：Default electricity
Press threshold value, triggering dump is peak value or valley, the scheduled time, and test be L lines,
Residual voltage value in three lines of N lines and E lines between any two lines.
In one embodiment, the predetermined voltage threshold is 34V, and the preset time is 1 second.
There is provided a kind of plug residual voltage test device and method of testing, the plug in the above-described embodiments
Residual voltage test device can recognize the peak value or valley of voltage, and when identifying peak value and valley certainly
It is dynamic to cut off the electricity supply, and the residual voltage value of the plug after the scheduled time of cutting off the electricity supply can be automatically determined, so as to solve
Having determined needs repeatedly to plug in the prior art plug and could realize complex operation caused by residual voltage measurement,
The inaccurate technical problem of test result, has reached the technique effect of simple Accurate Determining plug residual voltage.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, the present invention
Schematic description and description be used for explain the present invention, do not constitute to the present invention improper limit
It is fixed.In the accompanying drawings：
Fig. 1 is the structured flowchart of plug residual voltage test device according to embodiments of the present invention；
Fig. 2 is method of testing flow chart according to embodiments of the present invention；
Fig. 3 is another structured flowchart of plug residual voltage test device according to embodiments of the present invention；
Fig. 4 is a kind of circuit diagram of plug residual voltage test device according to embodiments of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment party
Formula and accompanying drawing, are described in further details to the present invention.Here, the exemplary embodiment of the present invention
And its illustrate to be used to explain the present invention, but it is not as a limitation of the invention.
Inventor, can by the instrument in view of that can set a kind of instrument of automatic test plug residual voltage
To test family's plug residual voltage automatically, the tester realizes the real-time inspection of power supply by electronic circuit
Survey, it is possible to select crest and trough to disconnect according to test request, it is not necessary to which oscillograph can just show automatically
Show the residual voltage value after 1S, whole test process is simple to operate, and test result is also more accurate.
Specifically, as shown in figure 1, plug residual voltage test device provided in an embodiment of the present invention can be wrapped
Include：
Power supply 101, for providing power supply for tested plug 100；
Zero cross detection circuit 102, is connected with the power supply, for detecting that the power supply is currently described
Whether the voltage that tested plug is provided reaches peak value or valley；
Dump part 103, is connected with the power supply and the zero cross detection circuit, in institute
State the voltage that zero cross detection circuit detects the power supply and currently provided for the tested plug and reach peak
In the case of value or valley, cut off the electricity supply；
Test in point control circuit 104, the L lines, N lines and E lines for realizing the tested plug
The selection and control of magnitude of voltage between any two；Wherein, L represents live wire, and N represents zero line, E tables
Show ground wire；
Voltage detecting circuit 105, it is described tested for detecting that the power supply was disconnected after the scheduled time
Residual voltage value in L lines, N lines and the E lines of plug between any two.
In order to reach quick on-off, the purpose of delay is reduced, above-mentioned dump part can be selected
IGBT, realizes that voltage peak is cut off using IGBT, can make up in the past with relay deenergization institute
The delay caused, improves test accuracy.
The main purpose of the plug residual voltage test device is exactly whether the residual voltage of test plug exceeds limit value,
Determine whether plug quality is qualified, therefore, it can show the residual voltage value measured, can also directly show
Show test judged result.Therefore, above-mentioned plug residual voltage test device can also include：Display unit,
It is connected with voltage detecting circuit, it is above-mentioned for showing the residual voltage value that the voltage detecting circuit is detected
Plug residual voltage test device can also include：Laser-emitting diode, is connected with voltage detecting circuit, is used for
In the case where the residual voltage value that the voltage detecting circuit is detected is more than predetermined voltage threshold, reported
Alert display, if for example, the residual voltage for detecting which plug is more than predetermined voltage threshold (such as 34V),
It so can just control laser-emitting diode display red, to indicate that the plug is unqualified.
Object measured by test plug residual voltage is residue of the plug after the scheduled time after cutting off the electricity supply
Voltage, is typically used as interval time using 1S, i.e. residual voltage value of the test plug after the 1S that cuts off the electricity supply,
Because accurately defining this 1S time, a timer can be set, the timer is cut with power supply
Disconnected part is connected with voltage detecting circuit, predetermined reaching for timing when power supply is cut-off
After time, trigger voltage detection circuit carries out residual voltage value detection.
Above-mentioned test point control circuit 104 can include：Control chip and multiple relays, wherein,
Control chip by controlling the break-make of the multiple relay, realize the tested plug L lines,
The selection and control of magnitude of voltage in N lines and E lines between any two, i.e. can be certainly by control chip
Relay between three lines of dynamic conducting, so as to realize the magnitude of voltage in the lines of L/N/E tri- between any two.
In order to be carried out to the plug residual voltage test device in further safeguard protection, above-mentioned test device
Current detection circuit is also provided with, can test plug residual voltage in real time by the current detection circuit
The loop current of test device, and in the case where detecting loop current beyond predetermined current threshold,
Cut off the power supply, i.e. if there is abnormal current, can cut off the electricity supply immediately, so as to realize peace
Full protection.
Based on above-mentioned plug residual voltage test device, additionally provided in this example a kind of based on the plug residual voltage
The method that test device carries out plug residual voltage test, as shown in Fig. 2 this method includes：
Step S201：Tested plug is connected in the plug residual voltage test device；
Step S202：Set the parameter needed for test；
Step S203：The break-make of power supply is controlled, the residual voltage to the tested plug is detected.
Parameter needed for above-mentioned test can be, but not limited to include at least one of：Predeterminated voltage threshold
Value, triggering dump is peak value or valley, the scheduled time, and test is L lines, N lines
And the residual voltage value in three lines of E lines between which two lines, wherein, predetermined voltage threshold can be 34V,
Preset time can be 1 second.
Above-mentioned plug residual voltage test device and method of testing are carried out with reference to a specific embodiment
Illustrate, it is important to note, however, that the specific embodiment is merely to be better described the present invention, and
Do not constitute inappropriate limitation of the present invention.
As shown in Figure 3 and Figure 4, the plug residual voltage test device can include：Switching power supply parts,
Current detection section, current detecting part, show by key control and LED, crest and trough it is automatic
Test point alternative pack between detection, dump part, the lines of L/N/E tri-, below to all parts
Effect is illustrated：
1) switching power supply parts, for providing power supply for instrumentation control system；
2) current detection section, for the voltage in real-time monitoring and test loop, and returns to what is monitored
Magnitude of voltage；
3) current detecting part, the electric current for detecting test loop in real time, if there is abnormal electric
Stream, then cut off the electricity supply, to realize security protection immediately；
4) show that, for realizing man-machine interaction, instrument hardware is included with LED by key control：Display
Parameter is set before circuit and key circuit, test, having tested just can be by the residual voltage value of test
Automatically show, so as to realize man-machine interaction；
5) crest and trough automatic detection, can use zero cross detection circuit, by detecting voltage wave
The triggering of the rising edge and trailing edge of shape recognizes crest and trough.
6) dump part, it is possible to use IGBT realize voltage peak cut off so that make up with
Toward with the delay caused by relay deenergization, to improve the accuracy of test result.
7) point selection is tested between the lines of L/N/E tri-, the relay between three lines can be turned on automatically by chip
(K6, K7, K8 and K9 in Fig. 4), realizes magnitude of voltage between any two in the lines of L/N/E tri-.
Test process based on the plug residual voltage test device shown in Fig. 3 and Fig. 4 can include：Test
Before, set parameter (for example：Point selection is tested between crest/trough, length of testing speech, the lines of L/N/E tri-
Deng).Test start after, voltage is detected in real time, when software identification power supply wave shape reach wave crest point (or
Person's trough point) when, IGBT deenergizations immediately, the same time connects test lead relay, LED
Display disconnects the magnitude of voltage after 1S, if voltage is more than 34V, instrument alarm shows the plug
Test failure, further, instrument is also whole to detect electric current, when electric current will more than safety threshold value
Cut off the electricity supply and protected with implementing circuit.
In upper example, plug residual voltage test device realizes that power supply is detected in real time by electronic circuit, and can
Crest and trough is selected to disconnect according to test request, it is not necessary to which oscillograph can be just shown after 1S automatically
Residual voltage value, whole test process is simple to operate and test result is more accurate.Tester
Only need to after utensil is connected into tester, set test parameter, upper electricity, you can be automatically performed survey
Examination process, shows that test obtains magnitude of voltage.
As can be seen from the above description, the embodiment of the present invention realizes following technique effect：Carry
A kind of plug residual voltage test device and method of testing are supplied, the plug residual voltage test device can recognize electricity
The peak value or valley of pressure, and power supply is automatically cut off when identifying peak value and valley, and can survey automatically
The residual voltage value of plug after the scheduled time of cutting off the electricity supply is scheduled on, so that solve needs repeatedly in the prior art
Plug plug could realize complex operation caused by residual voltage measurement, and the inaccurate technology of test result is asked
Topic, has reached the technique effect of simple Accurate Determining plug residual voltage.
Obviously, those skilled in the art should be understood that the above-mentioned embodiment of the present invention each module or
Each step can realize that they can concentrate on single computing device with general computing device
On, or be distributed on the network that multiple computing devices are constituted, alternatively, they can use calculating
Device executable program code is realized, it is thus possible to be stored in storage device by counting
Device is calculated to perform, and in some cases, can be shown to be performed different from order herein
Or the step of description, they are either fabricated to each integrated circuit modules respectively or by them
Multiple modules or step single integrated circuit module is fabricated to realize.So, the embodiment of the present invention
Any specific hardware and software is not restricted to combine.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for
For those skilled in the art, the embodiment of the present invention can have various modifications and variations.It is all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in
Within protection scope of the present invention.
Claims (10)
1. a kind of plug residual voltage test device, it is characterised in that including：
Power supply, for providing power supply for tested plug；
Zero cross detection circuit, is connected with the power supply, for detecting the power supply currently to be described tested
Whether the voltage that plug is provided reaches peak value or valley；
Dump part, is connected with the power supply and the zero cross detection circuit, in the mistake
Zero voltage that is currently provided to the power supply for the tested plug of detection electric circuit inspection reach peak value or
In the case of person's valley, cut off the electricity supply；
Test in point control circuit, the L lines, N lines and E lines for realizing the tested plug two-by-two
Between magnitude of voltage selection and control；
Voltage detecting circuit, for detecting that the power supply was disconnected after the scheduled time, the tested plug
L lines, N lines and E lines in residual voltage value between any two.
2. plug residual voltage test device according to claim 1, it is characterised in that the electricity
Source cut component includes：IGBT.
3. plug residual voltage test device according to claim 1, it is characterised in that also include：
Display unit, is connected with the voltage detecting circuit, for showing that the voltage detecting circuit is detected
Residual voltage value.
4. plug residual voltage test device according to claim 1, it is characterised in that also include：
Laser-emitting diode, is connected with the voltage detecting circuit, for being detected in the voltage detecting circuit
Residual voltage value be more than predetermined voltage threshold in the case of, carry out alarm indication.
5. plug residual voltage test device according to claim 1, it is characterised in that also include：
Timer, is connected with the dump part and the voltage detecting circuit, for from the power supply
Start timing when cut-off, after the scheduled time is reached, trigger the voltage detecting circuit and carry out
Residual voltage value is detected.
6. plug residual voltage test device according to any one of claim 1 to 5, its feature
It is, the test point control circuit includes：Control chip and multiple relays, wherein, the control
Coremaking piece is controlled by the break-make to the multiple relay, realizes L lines, the N of the tested plug
The selection and control of magnitude of voltage in line and E lines between any two.
7. plug residual voltage test device according to any one of claim 1 to 5, its feature
It is, in addition to：
Current detection circuit, the loop current for detecting the plug residual voltage test device in real time, and
In the case where detecting the loop current beyond predetermined current threshold, the power supply is cut off.
8. a kind of plug residual voltage test device by any one of claim 1 to 7 is carried out
The method of plug residual voltage test, it is characterised in that including：
Tested plug is connected in the plug residual voltage test device；
Set the parameter needed for test；
The break-make of power supply is controlled, the residual voltage to the tested plug is detected.
9. method according to claim 8, it is characterised in that the parameter needed for the test
Including at least one of：Predetermined voltage threshold, triggering dump is peak value or valley, in advance
Fix time, and test is residual voltage value in L lines, three lines of N lines and E lines between which two lines.
10. method according to claim 8, it is characterised in that the predetermined voltage threshold is
34V, the preset time is 1 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109812.9A CN107132431A (en) | 2016-02-26 | 2016-02-26 | Plug residual voltage test device and method of testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109812.9A CN107132431A (en) | 2016-02-26 | 2016-02-26 | Plug residual voltage test device and method of testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107132431A true CN107132431A (en) | 2017-09-05 |
Family
ID=59721617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610109812.9A Pending CN107132431A (en) | 2016-02-26 | 2016-02-26 | Plug residual voltage test device and method of testing |
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| Country | Link |
|---|---|
| CN (1) | CN107132431A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983297A (en) * | 2020-08-21 | 2020-11-24 | 重庆新世杰电气股份有限公司 | Instantaneous residual voltage detection method, device and equipment and residual voltage recording assembly |
| CN112415252A (en) * | 2020-11-06 | 2021-02-26 | 深圳康佳电子科技有限公司 | Method for measuring residual voltage of power plug and computer equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202956428U (en) * | 2012-11-29 | 2013-05-29 | 湖南省食品药品检验研究院 | Residual voltage testing device |
| CN203838221U (en) * | 2013-11-25 | 2014-09-17 | 浙江省质量检测科学研究院 | Intelligent high-precision multiphase residual voltage measurement device |
| CN203881844U (en) * | 2014-05-26 | 2014-10-15 | 上海大学 | Residual voltage detecting system based on MSP430 |
| CN104502665A (en) * | 2014-12-11 | 2015-04-08 | 通标标准技术服务(上海)有限公司 | Device and method for testing residual voltage |
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2016
- 2016-02-26 CN CN201610109812.9A patent/CN107132431A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202956428U (en) * | 2012-11-29 | 2013-05-29 | 湖南省食品药品检验研究院 | Residual voltage testing device |
| CN203838221U (en) * | 2013-11-25 | 2014-09-17 | 浙江省质量检测科学研究院 | Intelligent high-precision multiphase residual voltage measurement device |
| CN203881844U (en) * | 2014-05-26 | 2014-10-15 | 上海大学 | Residual voltage detecting system based on MSP430 |
| CN104502665A (en) * | 2014-12-11 | 2015-04-08 | 通标标准技术服务(上海)有限公司 | Device and method for testing residual voltage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983297A (en) * | 2020-08-21 | 2020-11-24 | 重庆新世杰电气股份有限公司 | Instantaneous residual voltage detection method, device and equipment and residual voltage recording assembly |
| CN111983297B (en) * | 2020-08-21 | 2023-09-08 | 重庆新世杰电气股份有限公司 | Instantaneous residual pressure detection method, device and equipment |
| CN112415252A (en) * | 2020-11-06 | 2021-02-26 | 深圳康佳电子科技有限公司 | Method for measuring residual voltage of power plug and computer equipment |
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Application publication date: 20170905 |
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