CN202066903U - Intelligent device suitable for static dynamic potential real-time test - Google Patents
Intelligent device suitable for static dynamic potential real-time test Download PDFInfo
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- CN202066903U CN202066903U CN2011201549817U CN201120154981U CN202066903U CN 202066903 U CN202066903 U CN 202066903U CN 2011201549817 U CN2011201549817 U CN 2011201549817U CN 201120154981 U CN201120154981 U CN 201120154981U CN 202066903 U CN202066903 U CN 202066903U
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Abstract
The utility model discloses an intelligent device suitable for static dynamic potential real-time tests, comprising a data acquisition module and a PC machine, wherein the data acquisition module comprises an input unit, a multipath switch, an A/D converter, a CPLD, an optical coupler isolation module and a USB bridge, wherein the CPLD, a USB bridge and the PC machine are successively connected, the input unit, the multipath switch and the A/D converter are successively connected and are all connected with the CPLD via the optical coupler isolation module for receiving control signals from the CPLD, and at the same time, the CPLD receives digital signals converted by the A/D converter and sends the signals back to the PC machine via the USB bridge. The device can monitor whole dynamic work process in real time in fields of hazardous article warehouses, gas stations, oil tankers, railway, road transportation, etc., and can continuously record and display dynamic level size, polarity and dynamic waveform of generated static in the whole dynamic work process in real time.
Description
Technical field
The utility model relates to the electrostatic test technical field, is specifically related to a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing.
Background technology
At present, divide according to working method, the electrostatic potential testing tool is divided into contact and contactless two kinds; Divide according to characteristics of signals, electrostatic potential can be divided into resting potential and two kinds of dynamic current potentials.
Contact makes testee directly contact with electrostatic voltmeter exactly, utilizes the equipotential principle to measure.This quasi-instrument is only applicable to the measurement of electrostatic conductor current potential, and is then powerless for the insulator that more is easy to generate static, and its mainstream product is a Q-V series electrostatic voltmeter.Contactless is exactly not contact with testee, uses the principle of electrostatic induction or air ionization, measures the electrostatic potential of electrified body indirectly.This quasi-instrument is applicable to the electrostatic potential of measuring conductor, insulator and human body etc.Compare with contact type measurement, the non-cpntact measurement result is subjected to the influence of instrument input capacitance, input resistance less, but the influence of tested person distance, electrified body physical dimension is bigger.
In the domestic existing electrostatic voltmeter, the current potential transport function of the overwhelming majority all is the function of frequency, and for the signal of different frequency, there is frequency distortion in its potential decay ratio difference in the reality test, be difficult to use in dynamic test.For example, Q-V series electrostatic voltmeter adopts the cursor indication, and damping is big, and cursor is stable to need the regular hour, can not be used for dynamic test.The instrument that really can be used in the electrostatic dynamic current potential has only two kinds; a kind of is that the Liu Shang of Shijiazhuang Ordnance Engineering College closes the ZPD-1 electrostatic dynamic potential test instrument that the academician presided over development in 1988, and another kind is the EST405 electrostatic dynamic computer monitoring warning system that doctor Huang Jiusheng of Beijing City Inst. of Labour Safety Science presided over development in 2003.ZPD-1 electrostatic dynamic potential test instrument adopts Liu Shang to close " signal self-shileding-electric charge coupling " test philosophy that the academician proposes, the enough gauge outfits of energy show the maximum value of tested electric potential signal in the whole test process, are convenient to determine the dynamic perfromance and the danger thereof of electrostatic power sources.But the attenuation constant of this instrument test signal is 10
7The s order of magnitude, for general test, this decay can be ignored the influence that test result causes, but still might cause bigger test error to long monitoring.Therefore, this instrument should not be used as measuring instrument.EST405 electrostatic dynamic computer monitoring warning system adopts capacitance-resistance voltage divider principle measurement of electrostatic current potential, is made up of electrostatic detection probe and alarm, can monitor the static of important department turnover personnel, goods.But, use ZPD-1 and EST405 and also have defective at the bigger dangerous goods operation process of many static hidden danger.For example, in a dead lift operation process of dangerous cargo, and in transit at railway, highway, steamer etc., because various vibrations, friction, static run up to dangerous high-order easily, the time report of incidents of spontaneous combustion in the haulage vehicle way is arranged is evidence, electrostatic accumulation is to how high in the above-mentioned operation process, polarity how, because the restriction of cost and technology implementation still can't realize omnidistance monitoring in real time at present; In addition, no matter be ZPD-1, or EST405 carry out passive real-time measurement to the scene, can not make caution in advance to a certain dangerous operating mode.
Summary of the invention
In order to overcome the shortcoming and the problem of existing correlation technique, the utility model provides a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing, omnidistance in real time monitoring can be carried out to the dynamic operation process in the fields such as dangerous goods store, refuelling station, oil tanker, railway, transport by road, and size, polarity and the dynamic waveform that produces the electrostatic dynamic current potential in these dynamic operation process can be write down, analyze and show continuously in real time.
A kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing of the present utility model comprises data acquisition module and PC; Described data acquisition module comprises input block, multi-way switch, analog quantity digital quantity converter (hereinafter to be referred as A/D converter), CPLD (hereinafter to be referred as CPLD), light-coupled isolation module and USB bridge; Wherein the UBS bridge links to each other with PC with CPLD respectively, and the USB bridge joint is received the data acquisition command signal from PC, and this signal is transferred to CPLD; Described input block, multi-way switch and A/D converter link to each other successively, and all link to each other with CPLD by the light-coupled isolation module, acceptance is from the control signal of CPLD, the electrostatic dynamic current potential signal that produces in the dynamic operation process of all kinds of dangerous material that input block will collect by multi-way switch sends A/D converter to, after A/D converter is digital signal with electrostatic dynamic current potential conversion of signals, by the isolation amplification of light-coupled isolation module digital signal is exported to CPLD again, CPLD sends digital signal to PC by the USB bridge again.
Described input block is 16 passage electrostatic signal collection terminals, and each passage is made of a contactless electrometer, can realize multichannel synchronousing collection.
Described multi-way switch has 16 passages, can carry out synchronous acquisition with the input block of 16 passages, and the word that the input of 16 way switch amounts is synthetic 16 is delivered to A/D converter with analog acquisition.Carry out passage when being provided with, the passage of multi-way switch is provided with the passage of analog quantity.
Described A ∕ D converter is 12 precision, 16 passage A ∕ D converters, and input voltage range is :-5V～+ 5V or 0 V～10V, input impedance is 800 ~ 1000 kilo-ohms.
Described USB bridge adopts the high speed USB chip, and the acquisition instructions that PC can be sent is sent to CPLD; Described built-in chip type has Cache, can in real time the high-speed AD result be sent in the PC.
In a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing of the present utility model, wherein CPLD is a core.In measuring process, at first start-up routine is accepted the instruction that PC starts collection, information such as the port number of gathering and sample frequency, clock mode are sent to CPLD by the USB bridge, after CPLD receives these information, start acquisition function immediately in real time, import information such as the port number gathered and sample frequency into input block and A ∕ D converter, and timing is sent to CPLD with information, is sent to PC by the USB bridge then.
Described light-coupled isolation module adopts TLP521-4
,TLP521-4 is built-in with four optocouplers.Described optocoupler is used to realize the conversion of the electricity-light-electricity of signal, plays the effect of input, output, isolation.Owing to isolate mutually between the photo-coupler input and output, the electric signal transmission has characteristics such as one-way, thereby has good electrical isolation capabilities and antijamming capability.
Described PC is ordinary individual's computing machine, MATLAB is housed, can carry out the special software of functions such as data storage, demonstration, filtering, can show with the display of PC instantaneous value waveform, can also collection result be preserved by the disk of PC, and special software can also carry out FFT analysis of spectrum, power spectrumanalysis, digital filtering to signal.
Compared with prior art, the utlity model has following advantage:
(1) structure is more perfect, function is more: existing relatively electrostatic dynamic potential test instrument (ZPD-1 and EST405), the utility model has significantly been expanded the existing measurement function of EST405, and has added CPLD, can be to the sampling channel number,, frequency acquisition,, information such as clock mode is provided with, and makes the result of measurement more genuine and believable, CPLD can also carry out data transmission fast, and the attenuation constant of system is reduced;
(2) signal handling capacity is stronger: the PC in the utility model is equipped with special software, can will be presented at the analysis of spectrum result data of the waveform in the passage of current demonstration, the time range on the built-in FFT analysis of spectrum panel with curve or mode word; Can also use the built-in MATLAB software of special software, the waveform of current demonstration is carried out digital filtering and power spectrumanalysis etc.;
(3) range of application is wider: the utility model can be widely used in the bigger dynamic operation operating mode of many static hidden danger, as transportations such as the storage transport operation process of dangerous cargo or railway, highway, steamers, and the intelligent apparatus of this electrostatic dynamic current potential real-time testing is with low cost, has very strong using value.
Description of drawings
Fig. 1 is a kind of structural representation that is applicable to the intelligent apparatus of electrostatic dynamic current potential real-time testing of the present utility model;
Fig. 2 is the probe calibrating principle figure of input block among Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing comprises input block 1, multi-way switch 2, A/D converter 3, CPLD4, light-coupled isolation module 5, USB bridge 6 and PC 7.
Input block 1, multi-way switch 2, A/D converter 3 link to each other successively, input block 1, multi-way switch 2 all link to each other with CPLD 4 by light-coupled isolation module 5 with A/D converter, and accepting control signal from CPLD 4, CPLD 4 receives the digital signal of A/D converters output simultaneously.USB bridge 6 links to each other with PC 7 with CPLD 4 respectively, and USB bridge 6 will be sent to CPLD 4 from the command signal of PC 7, and will be sent to PC 7 from the digital signal of CPLD 4.
Concrete operations step of the present utility model is as follows:
Step 1: described data acquisition module connects by USB bridge and PC, at first the electrostatic potential measuring sonde is carried out measurement and calibration, to guarantee the accuracy of data acquisition.Concrete principle is seen shown in Figure 2, and sheet metal is a calibration plate, and with the ground insulation, T is the electrostatic potential measuring sonde, ground connection.
In the special software of PC, two parameters that are used for the calibration of electrostatic potential measuring sonde are arranged, be respectively A and B.A is used to calibrate the zero point drift of probe, and B is used to calibrate the reading error of being introduced by detection range.
Calibration process is as follows: the electrostatic potential measuring sonde is towards zero potential direction (as ground), the A parameter value of special-purpose software in the PC is revised as 0, so just finished the calibration of probe zero point drift, with electrostatic generator sheet metal is added the normal voltage of setting then, probe moves to the measuring distance of setting, adjust the B parameter, make the probe reading that special-purpose software shows in the PC consistent with the normal voltage of electrostatic generator setting.So far, the calibration of probe is promptly accused and is finished.
Step 2: the special software by PC is with the port number and the sample frequency of multi-way switch, and information setting such as clock mode are finished.
Step 3: the instruction that is provided with in the PC is sent to CPLD by the USB bridge, after CPLD receives instruction, begin to start acquisition function immediately, control informations such as port number, sample frequency are sent to input block, multi-way switch and A/D converter, multi-way switch 2 has 16 passages, carries out the word that the input of 16 way switch amounts is synthetic 16 synchronously with the input block collection of 16 passages, deliver to A/D converter with analog acquisition, be sent to input block by multi-way switch again.
Step 4: input block begins to gather the electrostatic dynamic current potential signal that produces in the dynamic operation process of all kinds of dangerous material, and this electrostatic dynamic current potential signal is sent to multi-way switch, be sent to A/D converter through multi-way switch, A/D converter becomes digital signal with analog signal conversion, through the light-coupled isolation module digital data transmission is arrived CPLD.The light-coupled isolation module is TLP521-4, and TLP521-4 is built-in with four optocouplers.
Step 5: electrostatic dynamic current potential signal transmits PC from CPLD through the USB bridge, and PC carries out signal processing analysis and calculating by being pre-installed on its inner special software, finally demonstrates the instantaneous value and the polarity of the electrostatic dynamic current potential of testee.
Need to prove at last: above embodiment is the unrestricted the technical solution of the utility model in order to explanation only, although the utility model is had been described in detail with reference to above-mentioned embodiment, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the utility model, and replace any modification and the part that do not break away from spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.
Claims (4)
1. an intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing comprises data acquisition module and PC; Described data acquisition module comprises input block, multi-way switch, analog quantity digital quantity converter, CPLD, light-coupled isolation module and USB bridge; Described CPLD, UBS bridge, PC connect successively; Described input block, multi-way switch and analog quantity digital quantity converter are connected successively, and all are connected with CPLD by the light-coupled isolation module.
2. a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing according to claim 1 is characterized in that: described input block is 16 passage electrostatic signal collection terminals, and each passage is made of a contactless electrometer.
3. a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing according to claim 1, it is characterized in that: described A ∕ D converter is 12 precision, 16 passage A ∕ D converters, input voltage range is :-5V～+ 5V or 0 V～10V, input impedance is 800 ~ 1000 kilo-ohms.
4. a kind of intelligent apparatus that is applicable to electrostatic dynamic current potential real-time testing according to claim 1 is characterized in that: described USB bridge adopts the high speed USB chip, and described built-in chip type has Cache.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201549817U CN202066903U (en) | 2011-05-16 | 2011-05-16 | Intelligent device suitable for static dynamic potential real-time test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201549817U CN202066903U (en) | 2011-05-16 | 2011-05-16 | Intelligent device suitable for static dynamic potential real-time test |
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| CN202066903U true CN202066903U (en) | 2011-12-07 |
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| CN2011201549817U Expired - Fee Related CN202066903U (en) | 2011-05-16 | 2011-05-16 | Intelligent device suitable for static dynamic potential real-time test |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288812A (en) * | 2011-05-16 | 2011-12-21 | 华南理工大学 | Static dynamic potential intelligent test device with real-time testing technique |
| CN103021238A (en) * | 2012-12-07 | 2013-04-03 | 山东省远大网络多媒体股份有限公司 | Digital static tester |
| CN103176078A (en) * | 2011-12-26 | 2013-06-26 | 株式会社宇进产电 | Power quality monitoring apparatus for railway power system |
| CN103419671A (en) * | 2013-07-23 | 2013-12-04 | 南通大学 | Plug-in hybrid electric vehicle lithium battery real-time monitoring system |
| CN103713201A (en) * | 2013-12-24 | 2014-04-09 | 中国人民解放军军械工程学院 | Distributed automatic compensation surface static potential test system |
-
2011
- 2011-05-16 CN CN2011201549817U patent/CN202066903U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288812A (en) * | 2011-05-16 | 2011-12-21 | 华南理工大学 | Static dynamic potential intelligent test device with real-time testing technique |
| CN103176078A (en) * | 2011-12-26 | 2013-06-26 | 株式会社宇进产电 | Power quality monitoring apparatus for railway power system |
| CN103021238A (en) * | 2012-12-07 | 2013-04-03 | 山东省远大网络多媒体股份有限公司 | Digital static tester |
| CN103419671A (en) * | 2013-07-23 | 2013-12-04 | 南通大学 | Plug-in hybrid electric vehicle lithium battery real-time monitoring system |
| CN103713201A (en) * | 2013-12-24 | 2014-04-09 | 中国人民解放军军械工程学院 | Distributed automatic compensation surface static potential test system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20140516 |