CN205193134U - Measuring apparatu based on measure human contact current and terminal volume of discharging - Google Patents
Measuring apparatu based on measure human contact current and terminal volume of discharging Download PDFInfo
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- CN205193134U CN205193134U CN201520753223.5U CN201520753223U CN205193134U CN 205193134 U CN205193134 U CN 205193134U CN 201520753223 U CN201520753223 U CN 201520753223U CN 205193134 U CN205193134 U CN 205193134U
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Abstract
The utility model discloses a measuring apparatu based on measure human contact current and terminal volume of discharging, wherein, the electrical measurement system is put including the terminal that is used for measuring people's physical contact current measurement system of human contact current peak value and be used for the phase locking to measure sinusoidal wave peak value to the measuring apparatu, and people's physical contact current measurement system includes an oscilloscope measured module and a data collection card test module, the terminal is put the electrical measurement system and is included the 2nd oscilloscope test module and the 2nd data collection card test module. The utility model discloses a contact current measurement and terminal are put electrical measurement and are standardized to collect in an organic whole, but obtain the measuring apparatu of human shock current of accurate measurement and the terminal volume of discharging, and the simply easy realization of its methods of measurement, high practicality had.
Description
Technical field
The utility model relates to Electrical Safety detection field, particularly relates to measuring instrument and measuring method based on measuring human contact's electric current and terminal discharge capacity.
Background technology
Human contact's electric current also claims leakage current, is all electronics, the leakage current that all likely produces of electric equipment products, and serious words can cause the person to get an electric shock until the danger of death; And terminal discharge capacity is when under inspection user hand-lifting, attaching plug also touches unintentionally plug, the whether remaining enough voltage of capacitor of equipment Inner, it causes getting an electric shock until the danger of death to human body discharge by plug.No matter be international standard and CNS, all people is classified as body pickup current and terminal discharge capacity as key test item, has to pass through the detection of qualification mechanism and is confirmed whether to meet the requirements.
Also there is no the surveying instrument of commercialization power plug terminal discharge capacity and human contact's electric current in the market, and laboratory is all overlap simple frock and metering circuit by slip-stick artist substantially, equipment outsides on testing table such as Test Switchboard, 100:1 high-pressure attenuator, oscillograph, insulating power supply transformer, pressure regulator are linked together, not only measuring process is unreliable, and all parts are all 220V and exposed, in test operation, there is very large danger.
Therefore, prior art has yet to be improved and developed.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide the measuring instrument based on measuring human contact's electric current and terminal discharge capacity, and being intended to solve in prior art does not have a kind of structure to be simple and easy to realize and well can solve the problem of the surveying instrument of human electric shock's electric current and the measurement of terminal discharge capacity.
The technical solution of the utility model is as follows:
A kind of measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, described measuring instrument comprises the human contact's current measurement system for measuring human contact's current peak and the terminal discharge capacity measuring system for the sinusoidal wave peak value of phase-locked measurement;
Wherein, described human contact's current measurement system comprises the first oscilloscope measurement module and the first data collecting card test module; Described terminal discharge capacity measuring system comprises the second oscillograph test module and the second data collecting card test module.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, be provided with the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω in described first oscillograph test module, in described first data collecting card test module, be provided with a data collecting card.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, be provided with the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω in described second oscillograph test module, in described second data collecting card test module, be provided with clamp circuit plate and a data collecting card.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, described measuring instrument is provided with a DC digital voltmeter and real effective AC digital voltmeter.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, described measuring instrument is provided with an external power supply interface.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, is also provided with a pickup current input end and multiplex measurement lead-out terminal in described measuring instrument.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, the first oscilloscope measurement module and the first data collecting card test module share same measurement network, measuring condition arranges switch and peripheral circuit.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, the second oscillograph test module and the second data collecting card test module share same measurement network, measuring condition arranges switch and peripheral circuit.
The described measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, described terminal discharge capacity measuring system also includes a pressure regulator and variometer.
Beneficial effect: measuring instrument and the measuring method based on measuring human contact's electric current and terminal discharge capacity described in the utility model, wherein, described measuring instrument comprises the human contact's current measurement system for measuring human contact's current peak and the terminal discharge capacity measuring system for the sinusoidal wave peak value of phase-locked measurement.The utility model is measured by pickup current and standardization is carried out in the measurement of terminal discharge capacity, and be integrated in one, acquisition can the measuring instrument of Measurement accuracy human electric shock electric current and terminal discharge capacity, and its measuring method is simple and easy to realize, and has high practicality and security.
Accompanying drawing explanation
Fig. 1 is the measuring instrument structural representation based on measuring human contact's electric current and terminal discharge capacity described in the utility model.
Embodiment
The utility model provides the measuring instrument based on measuring human contact's electric current and terminal discharge capacity, for making the purpose of this utility model, technical scheme and effect clearly, clearly, further describes below to the utility model.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the utility model provides a kind of measuring instrument based on measuring human contact's electric current and terminal discharge capacity, wherein, described measuring instrument comprises the human contact's current measurement system 10 for measuring human contact's current peak and the terminal discharge capacity measuring system 20 for the sinusoidal wave peak value of phase-locked measurement.Namely measuring instrument described in the utility model includes 2 parts, measures human contact's electric current and terminal discharge capacity respectively by this 2 part system, thus realizes the discharge capacity simultaneously measuring leakage current and plug in a measuring instrument, ensures the safety of user.
In the prior art, about the measurement of human contact's electric current and terminal discharge capacity, what most laboratory was equipped with is that triumph company of the U.S. produces, by the pointer leakage current table of U.S. UL standard design, the rolenc force deflector list index that this indicator type current meter relies on the DC component of tested electric current to produce in pointer coil also provides reading, obviously, it can only measure pickup current mean value (direct current), and this do not meet international standard and China national standard require to measure " real effective and peak value " and regulation.If tested pickup current is sinusoidal wave, then can carry out data conversion according to the corresponding relation of sinusoidal wave effective value and peak value, DC component, but, along with the development of electronics techniques and the consideration of efficiency, electronic product generally adopts Switching Power Supply, and human contact's electric current that Switching Power Supply produces is various nonsinusoidal waveforms, in this case, the reometer of pointer-type just can not carry out Measurement accuracy.Therefore; laboratory all abandons using indicator type current meter when participating in ability verification, laboratory data comparison, arbitration measurement; and adopt on-the-spot overlap joint test circuit and measure network; test condition can simplify by this overlap joint usually; such as, omit fault in analog, simulation center line fault; dipole inversion etc., therefore can not test out to entirely accurate the actual conditions of human contact's electric current and terminal discharge capacity.
Based on the measuring instrument measuring human contact's electric current and terminal discharge capacity described in the present embodiment, propose based on above-mentioned Problems existing and actual demand just, its by most important in electronic product safety standard, be also two the most frequently used measure the items: standardization is carried out in human contact's current measurement and the measurement of terminal discharge capacity, and synthesis is in a measuring instrument, it can accurately measure human contact's electric current and terminal discharge capacity, and its structure is simple and easy to realize, and has high practicality.
Preferably, described human contact's current measurement system comprises the first oscilloscope measurement module 110 and the first data collecting card test module 120.The current measurement system of human contact described in the utility model designs according to the measuring principle specified in IEC60990 " Protective conductor current and pickup current measure " standard, be integrated with U1, U2, U3 tri-that this international standard provides measures network, meanwhile, this part system covers the three kinds of analog circuit fault test setting states specified in this standard in design: 1. analog power protection ground wire open circuit; 2. analog power center line open circuit; 3. analog power phase line and center line polarity inversion.And described first oscilloscope measurement module 110 and the first data collecting card test module 120 shares identical measurement network, measuring condition arranges switch and peripheral circuit, by metering computer or notebook computer, use different Survey Software, directly can read Wave data to go forward side by side row relax and storage, obtain human contact's current value.
Further, in described first oscillograph test module 110, be provided with the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω, in described first data collecting card test module 120, be provided with a data collecting card.Because measured human contact's electric current is usually very low, standard-required is no more than 0.5mA, its weak output signal, electronic product widely uses Switching Power Supply in addition, human contact's power frequency is very high, use human contact's electric current measured by USB oscillograph usually with ground unrest interference, be difficult to judge its peak amplitude or measurement result inaccurate; Under feeble signal, the problem of noise is subject in order to overcome USB oscillograph traditional measurement method, in the utility model, the first data collecting card test module 120 adopts data collecting card, and develop testing software specially, " common mode input " method of employing, effectively counteract interference, make human contact's current waveform distinct, can ensure that digital independent is accurate.
In addition, for above-mentioned two modules, in order to measure human contact's current true virtual value, the first oscillograph test module 110 can utilize built-in USB oscillograph and oscillography probe directly to read, but the interference under weak signal can cause larger measuring error, and described first data collecting card test module 120 adopts and levels off to " integral method " of real effective in theory most, measuring error can be reduced, its principle is: by the Survey Software control data capture card worked out voluntarily, tested human body pickup current waveform is cut into width along time shaft equal, some matrixes that high low amplitude does not wait, its rectangular area V*t is exactly differential energy, these area accumulations of a signal period are got up, obtain the energy of integration, the energy of integration is divided by cycle length, just obtain real effective, obviously, it is thinner that rectangle is separated, result is more close to real effective.
Because the peak value of what the first oscillograph test module 110 described in the utility model and described first data collecting card test module were mainly measured is human contact's electric current, and international standard also requires effective value and the DC component of measuring human contact's electric current, therefore, instrument DC digital voltmeter and real effective AC digital voltmeter can also be set in this measuring instrument, make it possible to the current effective value required in reading standard intuitively, fast.
Further, due to described first oscilloscope measurement module 110 with the first data collecting card test module 120 shares same measurement network, measuring condition arranges switch and peripheral circuit.Making between two modules can the accuracy of comparison data and confirmation data mutually, has practice significance.
In addition, domestic at present do not have special terminal discharge capacity surveying instrument, and the general way in laboratory adopts isolating transformer, pressure regulator, switch and oscillograph and overlap joint measurement circuit to measure, this complex operation and accuracy is not high; And in order to obtain the maximum pd quantity being positioned at sinusoidal wave peak dot, need repeated measurement more than at least ten times, just likely capture the maximum pd quantity of this sinusoidal wave peak value, experimental result has contingency and its operation steps is complicated.
And another part of measuring instrument described in the utility model is exactly the measurement being specifically designed to opposite end electron discharge amount.For terminal discharge capacity measuring system part, it comprises the second oscillograph test module 210 and the second data collecting card test module 220.It can carry out the measurement of terminal discharge capacity efficiently, accurately, safely, and these two modules are also shared identical metering circuit and voltage table, by metering computer or notebook computer, use different Survey Software, directly can read Wave data to go forward side by side row relax and storage, obtain terminal electric discharge value.
Further, the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω is provided with in described second oscillograph test module 210, be provided with clamp circuit plate and a data collecting card in described second data collecting card test module 220, described terminal discharge capacity measuring system 20 also includes a pressure regulator and variometer.The USB oscillograph of built-in 100Mz and the oscilloprobe of 100M Ω in described second oscillograph test module 210, its measuring principle is with use operation and calibrate identical with traditional oscilloscope measurement method.And traditional measurement method can not carry out phase-locked measurement, namely disposablely can not start at sinusoidal wave peak point exactly and measure, in order to obtain the maximum pd quantity of peak point, often need repeated test at least 10 times, complex operation is not easy.
The problem that the randomness measured to solve traditional oscillograph is brought, " system is approved mutually in the testing result world: IECEE-CB system " belonging to International Electrotechnical Commission recommended CB laboratory, various countries to adopt " locking the terminal discharge capacity measuring method of sinusoidal wave peak phase " in 2011 with No. 267 CTL resolutions, this instrument is exactly require according to this and be configured with the second data collecting card test module 220 of terminal discharge capacity measuring system 20, this module devises clamp circuit, utilize the Survey Software of special exploitation, adjust clamped level, can accurately discharge test point be locked on sinusoidal wave peak phase, then data collecting card treatment and analysis data are utilized.Owing to introducing the second data collecting card test module 220, this measuring instrument is made to require to coincide with the measurement of international organization in terminal discharge capacity measuring technique, guarantee measurement result accurately also by international organization is accepted, and, disposable measurement instead of traditional random catching test of at least 10 times, can realize efficiently, safely, measure accurately.
Similarly, described second oscillograph test module and the second data collecting card test module share same measurement network, measuring condition arranges switch and peripheral circuit, therefore also can in two kinds of modules mutual comparison data and confirmation data accuracy.
Preferably, described measuring instrument is provided with an external power supply interface.Because supply transformer and pressure regulator limit by size in this measuring instrument, its power is 250W, in order to powerful sample can be measured, be provided with external power supply port, carry out switching by power supply selector switch to select, make the usable range of described measuring instrument not by the restriction of internal transformer power.
In preferred embodiment, in described measuring instrument, be also provided with a pickup current input end and multiplex measurement lead-out terminal.
The measuring method of measuring instrument described in the present embodiment is: described first oscilloscope measurement module is by USB oscilloscope measurement human contact electric current, and by the data collecting card correction measuring error in the first data collecting card test module, the human contact's current value measured by acquisition;
And the clamp circuit plate in described second data collecting card test module locks sinusoidal wave peak phase, described second oscillograph test module is by the terminal discharge capacity on the sinusoidal wave peak phase of USB oscilloscope measurement, and by the data collecting card correction measuring error in the second data collecting card test module, the terminal electric discharge value measured by acquisition.
In sum, measuring instrument based on measuring human contact's electric current and terminal discharge capacity described in the utility model, wherein, described measuring instrument comprises the human contact's current measurement system for measuring human contact's current peak and the terminal discharge capacity measuring system for the sinusoidal wave peak value of phase-locked measurement.The utility model is measured by pickup current and standardization is carried out in measurements of terminal discharge capacity, and is integrated in one, and acquisition can the measuring instrument of Measurement accuracy human electric shock electric current and terminal discharge capacity, and its measuring method is simple and easy to realization, has high practicality.
Should be understood that; application of the present utility model is not limited to above-mentioned citing; for those of ordinary skills, can be improved according to the above description or convert, all these improve and convert the protection domain that all should belong to the utility model claims.
Claims (9)
1. one kind based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, described measuring instrument comprises the human contact's current measurement system for measuring human contact's current peak and the terminal discharge capacity measuring system for the sinusoidal wave peak value of phase-locked measurement;
Wherein, described human contact's current measurement system comprises the first oscilloscope measurement module and the first data collecting card test module; Described terminal discharge capacity measuring system comprises the second oscillograph test module and the second data collecting card test module.
2. according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, be provided with the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω in described first oscillograph test module, in described first data collecting card test module, be provided with a data collecting card.
3. according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, be provided with the USB oscillograph of a 100Mz and the oscilloprobe of 100M Ω in described second oscillograph test module, in described second data collecting card test module, be provided with clamp circuit plate and a data collecting card.
4., according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, described measuring instrument is provided with a DC digital voltmeter and real effective AC digital voltmeter.
5., according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, described measuring instrument is provided with an external power supply interface.
6., according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, in described measuring instrument, be also provided with a pickup current input end and multiplex measurement lead-out terminal.
7. according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, the first oscilloscope measurement module and the first data collecting card test module share same measurement network, measuring condition arranges switch and peripheral circuit.
8. according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, the second oscillograph test module and the second data collecting card test module share same measurement network, measuring condition arranges switch and peripheral circuit.
9., according to claim 1 based on the measuring instrument measuring human contact's electric current and terminal discharge capacity, it is characterized in that, described terminal discharge capacity measuring system also includes a pressure regulator and variometer.
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| CN201520753223.5U CN205193134U (en) | 2015-09-25 | 2015-09-25 | Measuring apparatu based on measure human contact current and terminal volume of discharging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518055 Electronic Testing Building No. 43 Xilisha River Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: China Inspection and Inspection Group South Testing Co., Ltd. Address before: 518055 Electronic Testing Building No. 43 Xilisha River Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: China Southern electronics test (Shenzhen) Limited by Share Ltd |
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| CP01 | Change in the name or title of a patent holder |