CN110118886A - A kind of multimeter test pen having electrification early warning and blocking function - Google Patents
A kind of multimeter test pen having electrification early warning and blocking function Download PDFInfo
- Publication number
- CN110118886A CN110118886A CN201910421303.3A CN201910421303A CN110118886A CN 110118886 A CN110118886 A CN 110118886A CN 201910421303 A CN201910421303 A CN 201910421303A CN 110118886 A CN110118886 A CN 110118886A
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- China
- Prior art keywords
- test
- multimeter
- coupling relay
- electrification
- early warning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The present invention provides a kind of multimeter test pens for having electrification early warning and blocking function, including alarm circuit, electrical verification circuit and test loop.Wherein, alarm circuit is successively composed in series with the normally opened node of light emitting diode, buzzer and light coupling relay by battery.Electrical verification circuit is successively composed in series with current-limiting resistance, light coupling relay, multimeter and test pencil two by test pencil one.Test loop is successively composed in series with the normally closed node of light coupling relay, testing button, multimeter and test pencil two by test pencil one.Technical solution of the present invention, which can effectively avoid, misuses multimeter gear or accidentally survey measuring point bring risk.In addition, technical solution provided by the invention can substitute traditional test pen completely, matches with market mainstream multimeter on sale, insulation meter, can directly replace use.
Description
Technical field
The invention belongs to voltages and resistance measurement techniques field, and in particular to one kind has electrification early warning and blocking function
Multimeter test pen.
Background technique
Existing multimeter test pen is common test pen, only has the function of connection measurand and multimeter, Ci Zhongbiao
Pen exists following insufficient: (1) when needing when control loop measures voltage value, may misuse current gear, on-off shelves due to fault
Or resistance grade, it is tested circuit conducting and causes control function involuntary maneuver, will lead to that production line is out of service, power generation under serious conditions
The consequences such as unit chaser, transmission line of electricity tripping.(2) when need electric power loop measure voltage value when, may due to fault misuse
Current gear, on-off shelves or resistance grade are tested circuit conducting and cause power supply short circuit, will lead to power supply forfeiture, equipment under serious conditions
The consequences such as damage, personal injury.(3) when needing to measure loop resistance or on-off, may be caused due to equipment state etc.
Measurand is surprisingly charged, and causes consequence with (1), (2).(4) when needing to measure loop resistance or on-off, the mistake due to fault
Energized circuit is measured, causes consequence with (1), (2).
Due to the inherent limitation of people, human-equation error is impossible to avoid completely, once since fault uses wrong shelves
Position measures wrong measuring point and will have serious consequences, and a lot of multimeter gear mistakes or measuring point had occurred in power industry
The events such as generator chaser, protection control malfunction that mistake causes.Based on this, it would be highly desirable to design a kind of novel test pen.
Summary of the invention
The technical problem to be solved in the present invention is to provide it is a kind of have electrification early warning and blocking function multimeter test pen,
Avoid human-equation error bring serious consequence.
In order to achieve the above objectives, the technical solution used in the present invention are as follows:
A kind of multimeter test pen having electrification early warning and blocking function, including alarm circuit, electrical verification circuit and test
Circuit.
Wherein, alarm circuit is successively concatenated with the normally opened node of light emitting diode, buzzer and light coupling relay by battery
Composition.
Electrical verification circuit is successively composed in series with current-limiting resistance, light coupling relay, multimeter and test pencil two by test pencil one.
Test loop is successively concatenated with the normally closed node of light coupling relay, testing button, multimeter and test pencil two by test pencil one
Composition.
The electrical verification circuit be additionally provided with light coupling relay locking node, test pencil one successively with current-limiting resistance, optocoupler relay
Device, light coupling relay locking node, multimeter and test pencil two concatenate.
It is opened point that light coupling relay, which is latched node, for self-sustaining after light coupling relay movement.
The normally opened node of light coupling relay is opened point, buzzer warning after light coupling relay normally opened node closure, together
When light emitting diode it is bright.
The normally closed node of light coupling relay is normally closed point.When measurand electrification, the normally closed node of light coupling relay is disconnected, and is closed
Lock test loop.Even if pressing testing button, due to light coupling relay locking node closure, light coupling relay still keeps movement shape
State, test loop are latched by the normally closed node of light coupling relay, and test loop does not turn on.
The buzzer and light emitting diode are integrated in separate modular, and the module is independently-powered using button power supply, with
Test lead is fixed as an entirety.
The contact resistance of the normally closed node of light coupling relay and testing button is not higher than 0.1 Ω.
The light emitting diode is red light emitting diodes.
The current-limiting resistance is matched with optocoupler Technology Selection, should be met optocoupler action sensitivity again while be guaranteed tested
Circuit safety.
It is obtained by the present invention to have the beneficial effect that
When measuring point is charged in contact, sound-light alarm can be issued by buzzer and light emitting diode, not press lower button at this time
Test loop is not turned on, and will not cause power supply short circuit and control loop conducting, be can effectively avoid and is misused multimeter gear or accidentally survey
Measuring point bring risk.In addition, technical solution provided by the invention can substitute traditional test pen completely, with market mainstream ten thousand on sale
Matched with table, insulation meter, can directly replace use.
Detailed description of the invention
Fig. 1 is the multimeter test pen circuit diagram for having electrification early warning and blocking function；
In figure: 1 is battery；2 be light emitting diode；3 be buzzer；4 are latched node for light coupling relay；5 press for test
Button；6 be light coupling relay；7 be current-limiting resistance；8 be the normally closed node of light coupling relay；9 be the normally opened node of light coupling relay；10 are
Multimeter, 11 be test pencil one, and 12 be test pencil two.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention provides a kind of multimeter test pen for having electrification early warning and blocking function, including report
Alert circuit, electrical verification circuit and test loop.
Wherein, alarm circuit by battery 1 successively with the normally opened node 9 of light emitting diode 2, buzzer 3 and light coupling relay
It composes in series.
Electrical verification circuit is successively concatenated with current-limiting resistance 7, light coupling relay 6, multimeter 10 and test pencil 2 12 by test pencil 1
Composition.
Test loop by test pencil 1 successively with the normally closed node 8 of light coupling relay, testing button 5, multimeter 10 and test pencil
2 12 compose in series.
The electrical verification circuit be additionally provided with light coupling relay locking node 4, test pencil 1 successively with current-limiting resistance 7, optocoupler
Relay 6, light coupling relay locking node 4, multimeter 10 and test pencil 2 12 concatenate.
It is opened point that light coupling relay, which is latched node 4, self-sustaining after acting for light coupling relay 6.
The normally opened node 9 of light coupling relay is opened point, and buzzer 3 is alarmed after the normally opened node 9 of light coupling relay is closed,
Light emitting diode 2 is bright simultaneously.
The normally closed node 8 of light coupling relay is normally closed point.When measurand electrification, the normally closed node 8 of light coupling relay
It disconnects, is latched test loop.Even if pressing testing button 5, since light coupling relay locking node 4 is closed, light coupling relay 6 is still
Action state is kept, test loop is latched by the normally closed node 8 of light coupling relay, and test loop does not turn on.
The buzzer 3 and light emitting diode 2 are integrated in separate modular, and the module is independently-powered using button power supply,
An entirety is fixed as with test lead.
The normally closed node 8 of light coupling relay and the contact resistance of testing button 5 are not higher than 0.1 Ω.
The current-limiting resistance 7 is matched with optocoupler Technology Selection, should be met optocoupler action sensitivity again while be guaranteed quilt
Survey time road safety.
The light emitting diode 2 is red light emitting diodes.
Technical solution of the present invention has the advantages that
When measuring point is charged in contact, sound-light alarm can be issued by buzzer and light emitting diode, not press lower button at this time
Test loop is not turned on, and will not cause power supply short circuit and control loop conducting, be can effectively avoid and is misused multimeter gear or accidentally survey
Measuring point bring risk.In addition, technical solution provided by the invention can substitute traditional test pen completely, with market mainstream ten thousand on sale
Matched with table, insulation meter, can directly replace use.
Claims (9)
1. a kind of multimeter test pen for having electrification early warning and blocking function, it is characterised in that: returned including alarm circuit, electrical verification
Road and test loop, the alarm circuit by battery (1) successively with light emitting diode (2), buzzer (3) and light coupling relay
Normally opened node (9) composes in series, electrical verification circuit by test pencil one (11) successively with current-limiting resistance (7), light coupling relay (6), general-purpose
Table (10) and test pencil two (12) compose in series, test loop by test pencil one (11) successively with the normally closed node of light coupling relay (8), survey
Examination button (5), multimeter (10) and test pencil two (12) compose in series.
2. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: described to test
Electrical circuit be additionally provided with light coupling relay locking node (4), test pencil one (11) successively with current-limiting resistance (7), light coupling relay
(6), light coupling relay locking node (4), multimeter (10) and test pencil two (12) concatenation.
3. having the multimeter test pen of electrification early warning and blocking function as claimed in claim 2, it is characterised in that: the light
It is opened point that coupling relay, which is latched node (4),.
4. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the light
Coupling relay normally open node (9) is opened point.
5. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the light
The normally closed node of coupling relay (8) is normally closed point.
6. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the bee
Ring device (3) and light emitting diode (2) are integrated in separate modular, and the module is independently-powered using button power supply, with test lead
It is fixed as an entirety.
7. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the light
The normally closed node of coupling relay (8) and the contact resistance of testing button (5) are not higher than 0.1 Ω.
8. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the hair
Optical diode (2) is red light emitting diodes.
9. having the multimeter test pen of electrification early warning and blocking function as described in claim 1, it is characterised in that: the limit
Leakage resistance (7) is matched with optocoupler Technology Selection, should be met optocoupler action sensitivity again while be guaranteed tested circuit safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421303.3A CN110118886B (en) | 2019-05-21 | 2019-05-21 | Universal meter test pen with live warning and locking functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421303.3A CN110118886B (en) | 2019-05-21 | 2019-05-21 | Universal meter test pen with live warning and locking functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110118886A true CN110118886A (en) | 2019-08-13 |
| CN110118886B CN110118886B (en) | 2021-06-29 |
Family
ID=67522902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910421303.3A Active CN110118886B (en) | 2019-05-21 | 2019-05-21 | Universal meter test pen with live warning and locking functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110118886B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687334A (en) * | 2019-10-09 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司柳州局 | Relay protection error-proof digital multimeter |
| CN111273147A (en) * | 2020-03-17 | 2020-06-12 | 神华国能集团有限公司 | Insulation measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201043983Y (en) * | 2007-05-30 | 2008-04-02 | 黎荣昌 | Multifunctional electric meter |
| JP2010164493A (en) * | 2009-01-16 | 2010-07-29 | Hioki Ee Corp | Tester |
| CN202614823U (en) * | 2012-05-23 | 2012-12-19 | 鲍正浩 | Multifunctional electroprobe |
| CN203798898U (en) * | 2014-01-21 | 2014-08-27 | 长园共创电力安全技术股份有限公司 | High-voltage electriferous display locking device |
| CN204789733U (en) * | 2015-07-16 | 2015-11-18 | 国家电网公司 | Electrified display based on divide and be listed as module |
-
2019
- 2019-05-21 CN CN201910421303.3A patent/CN110118886B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201043983Y (en) * | 2007-05-30 | 2008-04-02 | 黎荣昌 | Multifunctional electric meter |
| JP2010164493A (en) * | 2009-01-16 | 2010-07-29 | Hioki Ee Corp | Tester |
| CN202614823U (en) * | 2012-05-23 | 2012-12-19 | 鲍正浩 | Multifunctional electroprobe |
| CN203798898U (en) * | 2014-01-21 | 2014-08-27 | 长园共创电力安全技术股份有限公司 | High-voltage electriferous display locking device |
| CN204789733U (en) * | 2015-07-16 | 2015-11-18 | 国家电网公司 | Electrified display based on divide and be listed as module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687334A (en) * | 2019-10-09 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司柳州局 | Relay protection error-proof digital multimeter |
| CN111273147A (en) * | 2020-03-17 | 2020-06-12 | 神华国能集团有限公司 | Insulation measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110118886B (en) | 2021-06-29 |
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