CN204256029U - Residual voltage proving installation - Google Patents
Residual voltage proving installation Download PDFInfo
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- CN204256029U CN204256029U CN201420786687.1U CN201420786687U CN204256029U CN 204256029 U CN204256029 U CN 204256029U CN 201420786687 U CN201420786687 U CN 201420786687U CN 204256029 U CN204256029 U CN 204256029U
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- 238000012360 testing method Methods 0.000 abstract description 42
- 238000005516 engineering process Methods 0.000 abstract description 3
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Abstract
The utility model relates to a kind of residual voltage proving installation, comprise housing (1), internal electric source supplying module (2) is provided with in housing (1), MCU module (3), keyboard input module (4), variable-frequency power sources load module (5), crest voltage detection module (6) and voltage export and disconnect control module (7), internal electric source supplying module (2), the output terminal of keyboard input module (4) connects MCU module (3) respectively, MCU module (3) connecting peak threshold voltage detection module (6), the input end of crest voltage detection module (6) connects variable-frequency power sources load module (5), the output terminal of crest voltage detection module (6) connects voltage and exports and disconnect control module (7), compared with the existing technology, by checking and Comparability test, this proving installation and the anti-probe of high-voltage high resistance and oscillographicly to combinationally use, can effectively solve current repeated test and the not accurate enough problem of precision to the utility model.
Description
[technical field]
The utility model relates to electronic electric equipment pick-up unit technical field, specifically a kind of residual voltage proving installation.
[background technology]
For 8.4.3 chapters and sections ME EQUIPMENT intended to be connected to a power source by a plug & 8.4.4 chapters and sections Internal capacitive circuits (internal capacitance circuit) in the medicine equipment standard IEC 60601-1:2005 universal standard, or the 15th chapter voltage and (or) energy limited in medicine equipment standard IEC 60601-1:1988, and the relevant provision test of 60950.
At present for plug discharging test, conventional mode is by after the plug of tester's mechanical type, then connects oscilloscope measurement residual voltage size to realize test purpose.The weak point that this mode exists has 2 points: one, and the tie-time between plug and oscillograph is greater than a second usually; Its two, cannot effectively ensure to disconnect at the peak state of sine wave.
Because of singularity and the complicacy of active medical apparatus, current temporary needleless is on the market to the Related product of active medical apparatus, from the angle of test, the method that a lot of third party laboratory and national laboratory adopt or artificial plug, like this can produce three problems.1) test repeatability is bad, and error is large; 2) human factor determines the accuracy of test; 3) intelligent level is not high.
[utility model content]
The purpose of this utility model is exactly will solve above-mentioned deficiency and provide a kind of residual voltage proving installation, by checking and Comparability test, this proving installation and the anti-probe of high-voltage high resistance and oscillographicly to combinationally use, can effectively solve current repeated test and the not accurate enough problem of precision.
Design a kind of residual voltage proving installation for achieving the above object, comprise housing 1, internal electric source supplying module 2 is provided with in described housing 1, MCU module 3, keyboard input module 4, variable-frequency power sources load module 5, crest voltage detection module 6 and voltage export and disconnect control module 7, described internal electric source supplying module 2, the output terminal of keyboard input module 4 connects MCU module 3 respectively, described MCU module 3 connecting peak threshold voltage detection module 6, the input end of described crest voltage detection module 6 connects variable-frequency power sources load module 5, the output terminal of described crest voltage detection module 6 connects voltage and exports and disconnect control module 7.
The front of described housing 1 is provided with L input end 8, N input end 9, using state pilot lamp 10, starts button 11, stop key 12 and control enclosure socket 13, described startup button 11, stops key 12 by connection keyboard input module 4.
Described L input end 8, N input end 9 are connected to high-voltage high resistance anti-probe 14 two ends by two power leads, and the anti-probe 14 of described high-voltage high resistance is by one end of connection oscillograph 15, and the other end of described oscillograph 15 connects 220V civil power.
Described MCU module 3 comprises PIC single chip microcomputer, and the relay in described PIC single chip microcomputer adopts contactless solid-state relay.
The utility model compared with the existing technology, this device Devices to test normal power-up, from the power-off in time of the peak value (crest or trough) of alternating current, the residual voltage waiting for testing apparatus plug the two poles of the earth after 1s whether more than 60V ~.And according to existing domestic and international active medical apparatus and the requirement of associated electrical electric information product standard, residual voltage test need possess test probe and the oscillograph that an internal resistance is not less than 100M Ω, and requires to carry out 10 power down process at current test voltage peak.In order to adapt to the corresponding harsh standard of active medical apparatus, residual voltage proving installation described in the utility model is in order to accomplish the accuracy of reading, according to the standard analysis of IEC60601-1, during the AF panel capacitor≤0.1 μ F accessed between two phase lines, can exempt and carry out measuring between phase line, therefore according to discharge coefficient equation τ=RC.The minimum value of the anti-probe of its high-voltage high resistance must be greater than 10M Ω, in order to better measure, the utility model adopts the anti-probe of high-voltage high resistance of 500M Ω, because considering real-time, minimizing reading error that numerical value reads, this device adopts directly by oscillograph read test result mode at present, to ensure the accuracy of reading.To sum up: the utility model is by checking and Comparability test, and this proving installation and the anti-probe of high-voltage high resistance and oscillographicly to combinationally use, can effectively solve current repeated test and the not accurate enough problem of precision.In addition, this proving installation, without the need to the plug of tester's manual intervention plug equipment under test, only need complete a series of test by " Run " on device and " Stop " button, namely obtain data by oscillographic reading, simple and convenient.
[accompanying drawing explanation]
Fig. 1 is theory diagram of the present utility model;
Connection diagram when Fig. 2 is the utility model use;
In figure: 1, housing 2, internal electric source supplying module 3, MCU module 4, keyboard input module 5, variable-frequency power sources load module 6, crest voltage detection module 7, voltage export and disconnect control module 8, L input end 9, N input end 10, using state pilot lamp 11, start button 12, stop key 13, control enclosure socket 14, the anti-probe 15 of high-voltage high resistance, oscillograph.
[embodiment]
Below in conjunction with accompanying drawing, following further illustrating is done to the utility model:
As shown in drawings, the utility model comprises: housing 1, internal electric source supplying module 2 is provided with in housing 1, MCU module 3, keyboard input module 4, variable-frequency power sources load module 5, crest voltage detection module 6 and voltage export and disconnect control module 7, internal electric source supplying module 2, the output terminal of keyboard input module 4 connects MCU module 3 respectively, MCU module 3 connecting peak threshold voltage detection module 6, the input end of crest voltage detection module 6 connects variable-frequency power sources load module 5, the output terminal of crest voltage detection module 6 connects voltage and exports and disconnect control module 7, the front of housing 1 is provided with L input end 8, N input end 9, using state pilot lamp 10, start button 11, stop key 12 and control enclosure socket 13, start button 11, stop key 12 by connection keyboard input module 4.Wherein, sine wave is converted to DC pulse input by variable-frequency power sources load module 5, and automatically identifies and actuation of 50 Hz and 60Hz; Internal electric source supplying module 2 is for powering to residual voltage proving installation internal hardware; Keyboard input module 4 is for starting and stopping this residual voltage pick-up unit, and start button 11 and make the socket of device charged, stopping key 12 makes peak value power-off; Voltage export and disconnect control module 7 make keyboard input module 4 stop key 12 be pressed after, MCU module 3 can search out crest nearest in a frequency cycle nearby by crest voltage detection module 6 and carry out power-off; Crest voltage detection module 6 is for reading the peak of crest or trough.
The method of testing of this residual voltage proving installation, comprises the following steps,
1) L input end, N input end are connected to the anti-probe two ends of high-voltage high resistance by two power leads, the anti-probe of high-voltage high resistance is by the oscillographic one end of connection, and the oscillographic other end connects 220V civil power, opens oscillograph and detects;
2) power lead of sample is inserted the socket place of residual voltage proving installation in control enclosure socket, open the switch of sample simultaneously;
3) 0-300V electricity consumption is connected on variable-frequency power sources socket place in control enclosure socket, and regulates variable-frequency power sources, to reach the test voltage requirement of sample input;
4) oscillograph parameter is set, X, Y-axis is adjusted to respectively 100V/ unit lattice and 500ms/ unit lattice;
5) press startup button, start power supply, now using state pilot lamp lights, and represents that control enclosure socket now has electricity, reminds tester to take care;
6) press STOP in any testing process moment, now no matter alternating current is at crest or trough, can from top power source exponentially type fall;
7) by the oscillographic pause button of adjustment, after adjusting to 1s, numerical value is obtained, and reading result, this test result shows that plug is separated gained discharge data after a second in crest voltage situation with network source, namely completes and once tests, repeat 10 times, namely complete test purpose.
Wherein, sample comprise working current interval exchange the consumer of specified input at 0-15A and voltage range at 0-300V.MCU module comprises PIC single chip microcomputer, PIC single chip microcomputer adopts inner crystal oscillator, interrupt function, and the temporal calculation of its n level second, can cover the sampled operational of the frequency of civil power, relay in this PIC single chip microcomputer adopts contactless solid-state relay, contactless solid-state relay is for ensureing 10ms disjunction speed, and the maximum output rated current of contactless solid-state relay is 20A.
The utility model relates to a set of equipment plug residual voltage discharge test square law device, for being applied to single-phase active medicine equipment and associated electrical and consumer electrical products etc., can comprise household electrical appliance, checkout equipment, power supply adaptor etc.This proving installation, without the need to the plug of tester's manual intervention plug equipment under test, only need complete a series of test by the button of " Run " and " Stop " on device, namely obtain data by oscillographic reading, simple and convenient.
The design of this residual voltage proving installation effectively can meet working current interval and exchange the consumer of specified input at 0-15 and voltage range at 0-300V.Meanwhile, the accessory power outlet of this device adopts GB and multi-purpose socket, can compatible country variant plug.Waveform sampling is technical, by inner PIC single chip microcomputer computing, effectively ensures crest, trough breaking capacity.
This residual voltage proving installation hardware design adopts contactless solid-state relay, effectively ensures 10ms disjunction speed, higher than the power-off time of current other type more than relay 40ms on the market, to reaching the accuracy that desirable peak value captures; The maximum output rated current of solid-state relay simultaneously adopted is 20A, effectively can meet the rated load ranges of most laboratories equipment under test, reaches the consideration of the reliability and security ensureing test.PIC single chip microcomputer adopts inner crystal oscillator, interrupt function, low-power consumption, and the temporal calculation of its n level second, can cover completely the sampled operational of the frequency of civil power.
Residual voltage proving installation described in the utility model, its block schematic diagram comprises: internal electric source supplying module, MCU module, keyboard input module, variable-frequency power sources load module, crest voltage detection module and voltage export and disconnection detection module.This residual voltage proving installation main modular circuit hardware brief introduction: crest voltage detection module is because detected sample need detect under different voltage, so this residual voltage proving installation adopts variable-frequency power sources input, sine wave is converted to DC pulse input, and automatically can identify and actuation of 50 Hz and 60Hz, read peak value (crest or trough) position.Internal electric source supplying module mainly carries out power supply for residual voltage proving installation internal hardware and uses, and adopts 220V to exchange input and after inner AC-DC conversion, filtering and three-terminal voltage-stabilizing, exports direct current 15V, 12V and 5V respectively for each module for power supply.Keyboard input module mainly starts and stops this residual voltage pick-up unit, starts (RUN) and makes the socket of device charged, stop the power-off of (STOP) peak value, prepares to detect.Voltage exports and disconnects module, and Main Function is after the STOP button of keyboard input module is pressed, and MCU searches out crest nearest in a frequency cycle nearby by crest voltage sampling module and carries out power-off.
During test, by two reference power supply lines by 220V ~ be connected on civil power place (powering to proving installation), by 0-300V ~ be connected on variable-frequency power sources socket place, the variable-frequency power sources in laboratory is regulated to reach the test voltage requirement of sample input, then the crocodile clip of 2 on L, N of proving installation is connected respectively to the anti-probe two ends of high-voltage high resistance and connects oscillograph, open oscillograph and detect.By the power lead of sample, insert the socket place of residual voltage proving installation, open the switch of sample simultaneously.Arrange oscillograph parameter, by X, Y-axis is adjusted to 100V/ unit lattice and 500ms/ unit lattice respectively.Press RUN button, start power supply, now the red light of IN USE lights, and is intended to remind tester's control enclosure socket now charged, should be noted safety.Press STOP in any testing process moment, now no matter alternating current crest or trough can from top power source exponentially type fall.By adjusting oscillographic pause button, after adjusting to 1s, obtain numerical value, and reading result, this test result shows that plug is separated gained discharge data after a second in crest voltage situation with network source, namely completes and once tests, repeat 10 times, namely complete this project testing object.
This device Devices to test normal power-up, from the power-off in time of the peak value (crest or trough) of alternating current, the residual voltage waiting for testing apparatus plug the two poles of the earth after 1s whether more than 60V ~.As relied on merely manual plug, even if by oscillographic real-time monitoring, also be difficult to accurately from crest and trough (effective values that radical sign is 2 times), plug is separated with electrical network, test result so can be caused not to obtain under most severe condition, thus need ten plugs to obtain the condition of maximal value in peak situations from distribution of probability hypothesis.This standard clause consider plug be pulled out rear 1s after object be when avoiding that human body is unconscious touches plug metal part, would not cause because internal circuit electric discharge and to get an electric shock or the phenomenon of electricity fiber crops occurs.According to existing domestic and international active medical apparatus and the requirement of associated electrical electric information product standard, residual voltage test need possess test probe and the oscillograph that an internal resistance is not less than 100M Ω, and requires to carry out 10 power down process at current test voltage peak.
The utility model is not by the restriction of above-mentioned embodiment; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (4)
1. a residual voltage proving installation, it is characterized in that: comprise housing (1), internal electric source supplying module (2) is provided with in described housing (1), MCU module (3), keyboard input module (4), variable-frequency power sources load module (5), crest voltage detection module (6) and voltage export and disconnect control module (7), described internal electric source supplying module (2), the output terminal of keyboard input module (4) connects MCU module (3) respectively, described MCU module (3) connecting peak threshold voltage detection module (6), the input end of described crest voltage detection module (6) connects variable-frequency power sources load module (5), the output terminal of described crest voltage detection module (6) connects voltage and exports and disconnect control module (7).
2. residual voltage proving installation as claimed in claim 1, it is characterized in that: the front of described housing (1) is provided with L input end (8), N input end (9), using state pilot lamp (10), starts button (11), stops key (12) and control enclosure socket (13), and described startup button (11), stop key (12) are by connection keyboard input module (4).
3. residual voltage proving installation as claimed in claim 2, it is characterized in that: described L input end (8), N input end (9) are connected to the anti-probe of high-voltage high resistance (14) two ends by two power leads, the anti-probe of described high-voltage high resistance (14) is by one end of connection oscillograph (15), and the other end of described oscillograph (15) connects 220V civil power.
4. residual voltage proving installation as claimed in claim 3, is characterized in that: described MCU module (3) comprises PIC single chip microcomputer, and the relay in described PIC single chip microcomputer adopts contactless solid-state relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786687.1U CN204256029U (en) | 2014-12-11 | 2014-12-11 | Residual voltage proving installation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420786687.1U CN204256029U (en) | 2014-12-11 | 2014-12-11 | Residual voltage proving installation |
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| CN204256029U true CN204256029U (en) | 2015-04-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 |