CN104749442B - A kind of multipoint earthing electric resistance measurement apparatus - Google Patents
A kind of multipoint earthing electric resistance measurement apparatus Download PDFInfo
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- CN104749442B CN104749442B CN201310746710.4A CN201310746710A CN104749442B CN 104749442 B CN104749442 B CN 104749442B CN 201310746710 A CN201310746710 A CN 201310746710A CN 104749442 B CN104749442 B CN 104749442B
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- drop bar
- conducting metal
- electric resistance
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Abstract
The present invention relates to a kind of new multipoint earthing electric resistance measurement apparatus, including drop bar to be measured, auxiliary earth rod, current measuring instrument, pressure measuring instrument and signal processing apparatus, control managing device, analysis processing device etc. is constituted, current measuring instrument is connected respectively between the drop bar to be measured and auxiliary earth rod, pressure measuring instrument, the current measuring instrument, pressure measuring instrument is connected by Transmission system with signal processing apparatus, the signal processing apparatus is connected with control managing device by Transmission system, the control managing device is connected with analysis processing device by Transmission system.Soil resistivity can be measured while measurement of Grounding Resistance of the present invention again, automatic measurement while multiple operating points can be completed, and only needs to an auxiliary earth rod, while saving ground pile material, and the destruction to working environment is farthest avoided；Relative to artificial repeatedly measurement, cost is saved, measurement accuracy is improved, and measurement data can be updated at any time.
Description
Technical field
The present invention relates to electric power electrical apparatus field, more particularly to a kind of device of measurement of Grounding Resistance.
Background technology
Thunder and lightning is a kind of special meteor caused by powered cloud discharges in the air.Thunder and lightning is to cause electronic equipment
The major reason of damage, it threatens the peace of the every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs
Full stable operation.Lightning protection is one of measure for solving the above problems, in current lightning protection field, and earthing or grounding means is set
It is set to as very one of the key link, is directed not only to releasing for thunder and lightning, is more related to personal safety, equipment safety and is
The normal operation of system, specific setting of the various technical specifications now to earthing or grounding means, such as parameter, inspection criterion have in plain text
Regulation.
The state for understanding grounding resistance in real time is very necessary.Under current many working environments, often there was only single work
Point needs good earth to avoid because of the harm produced by imperfect earth, such as assembly line, production line, fuel charger or other classes
As environment.But common situation is, ground rod or earth mat cause grounding resistance probably due to bury corrosion of making moist in the ground for a long time
Function that is excessive, even losing ground connection；Or because constructing careless or other factorses, coupling box is not at all just with ground rod or earth mat
Connection；Or the electrical connection between ground rod or earth mat, equipment ground and operating point is breaking because of some reasons, these are all
One or more work stations can be caused not have good earth and cause harm.
The general existing practice is all the part for being only capable of solving foregoing problems at present, and most common is exactly with artificial side
The ground connection of each operating point of formula periodic detection.However, periodically checking manually, still it can not find immediately twice
The fault to ground occurred in a period of between detection；And this mode wastes time and energy, if can be to indoor environment in building
Cause considerable degree of destruction.
The conventional measuring method of grounding resistance has megger method, 0.618 method and isosceles triangle method.Megger method is based on measurement
One class method of the principle of pure resistance, is not suitable for measuring the grounding resistance of large area earth mat.0.618 method and isosceles triangle method are all
Belong to voltage x current method, interpolar potential shadow is both compensated by the relative position between current measuring instrument and pressure measuring instrument
Ring.0.618 method and isosceles triangle method just belong to common 3 mensurations.So-called 3 mensurations, are to survey grounding resistance
Two p-wires of instrument are measured, the two auxiliary earth rods accomplished fluently in advance are connected to, and Article 3 p-wire are connected to be measured
Drop bar or grounded screen.
Carry out digital grounding resistance tests using 3 mensurations, can measurement of Grounding Resistance can measure electric resistance of soil again
Rate, and have automatic compensation function, not only increases measurement accuracy, also with preventing the functions such as maloperation, intelligent prompt.But it is right
During multiple operating points, limit to obvious using 3 mensurations, it wastes ground pile material in requisition for multiple auxiliary earth rods,
And heavy damage working environment.
The content of the invention
In order to effectively solve problem above of the prior art, the present invention proposes a kind of multipoint earthing electric resistance measurement apparatus.
Maintain can measurement of Grounding Resistance can measure soil resistivity again, and there is automatic compensation function etc. to be surveyed as digital grounding resistance
While the advantage of examination；It can simultaneously be measured automatically for multiple operating points again, measurement purpose is reached efficient economizing.Device is by treating
Survey drop bar, auxiliary earth rod, current measuring instrument, pressure measuring instrument and signal processing apparatus, control managing device, at analysis
Manage the composition such as device.Current measuring instrument, pressure measuring instrument, the electric current are connected between the drop bar to be measured and auxiliary earth rod
Measuring instrument, pressure measuring instrument are connected by Transmission system with signal processing apparatus, the signal processing apparatus and control management dress
Put and be connected by Transmission system, the control managing device is connected with analysis processing device by Transmission system.
The drop bar to be measured has multiple, and the conducting metal of drop bar is connected to current measuring instrument, voltage as port and surveyed
Instrument is measured, conducting metal is in same horizontal plane.
The auxiliary earth rod only one of which, the centre of form for the solid that burial place is surrounded by drop bar to be measured is auxiliary
Helping includes two pieces of conducting metals and one piece of insulator in drop bar.Two parts conducting metal is equal with distance between insulator；Auxiliary
The conducting metal of the insulator of drop bar and drop bar to be measured is on same horizontal plane.
The current measuring instrument, is connected between drop bar to be measured and auxiliary earth rod, can be with automatic switching range.
The pressure measuring instrument, is connected between drop bar to be measured and auxiliary earth rod, can be with automatic switching range.
Described two pieces of conducting metals of auxiliary earth rod are respectively with the distance between corresponding drop bar conducting metal to be measured
Equal, thus at utmost reduce the measuring environment influence complicated and changeable to current-voltage measurement.
The signal processing apparatus, digital processing is carried out to detected voltage and current, and the A/D of collection is converted into number
After being handled by discrete fourier, the numerical value such as detection resistance value, soil resistivity are calculated.
The control managing device, can set to the time of measurement and frequency, and can control the multipoint earthing electricity
Hinder the information transfer between measurement apparatus and analysis processing device.
The analysis processing device, the information that the measurement is passed to is stored, is analyzed, shown and recorded.
Compared with prior art, the advantage of the invention is that：
1st, using buried device, soil resistivity can be measured while measurement of Grounding Resistance again, passes through testing current pole, electricity
Relative position between pressure test pole compensates interpolar influence of electric potential to measure true resistive value, method accurate science.
2nd, automatic measurement while multiple operating points can be completed, fundamentally prevents the artificial high cost payout repeatedly measured
Drawback, improves testing efficiency and accuracy.
3rd, an auxiliary earth rod is only needed to, while saving material, and is farthest avoided to working environment
Destruction.
4th, it can in real time detect, analyze, handle related data information, be that data are in last state, be that lightning protection is carried
For latest data information, detection data are accurate, it is to avoid the randomness and the low phenomenon of statistical analysis efficiency manually detected.
5th, control process device, can be controlled to current measuring instrument, the time of measuring of pressure measuring instrument and frequency, realize
Intellectualized operation.
Brief description of the drawings
Fig. 1 is the horizontal cross-section schematic diagram of the embodiment of the present invention.
Fig. 2 is the vertical section schematic diagram of the embodiment of the present invention.
Fig. 3 is the principle schematic diagram of the embodiment of the present invention.
Embodiment
Discuss embodiment with reference to the accompanying drawings and examples：
Such as the horizontal sectional view that Fig. 1 is the embodiment of the present invention：A1、A2…A5For drop bar to be measured, P is auxiliarily drop bar,
A is current measuring instrument, and V is pressure measuring instrument.
Such as the vertical section figure that Fig. 2 is the embodiment of the present invention：A1、AnFor drop bar to be measured, a1、anFor drop bar to be measured
Conducting metal；P is auxiliarily drop bar, b1、b2For the conducting metal of auxiliary earth rod, c is the insulator of auxiliary earth rod；A is
Current measuring instrument, V is pressure measuring instrument.
Such as the structure principle chart that Fig. 3 is the embodiment of the present invention：A1、AnFor drop bar to be measured, a1、anFor drop bar to be measured
Conducting metal；P is auxiliarily drop bar, and c is the insulator of auxiliary earth rod；A is current measuring instrument, and V is pressure measuring instrument；1
It is control managing device for signal processing apparatus, 2,3 be analysis processing device.
Except the implementation exception shown in Fig. 1,2,3, the present invention can also be other realities of multiple earth point measurement apparatus to be measured
Apply example.
The present invention is realized using following technical scheme：
Current measuring instrument, pressure measuring instrument, the current measurement are connected between the drop bar to be measured and auxiliary earth rod
Instrument, pressure measuring instrument are connected by Transmission system with signal processing apparatus, and the signal processing apparatus and control managing device are led to
Cross Transmission system to be connected, the control managing device is connected with analysis processing device by Transmission system.
The drop bar to be measured（A1、A2、A3…An）For multiple, the conducting metal of drop bar（a1、a2、a3…an）It is in same
In one horizontal plane.
The auxiliary earth rod P only one of which, is embedded in drop bar to be measured（A1、A2、A3…An）The shape of constituted solid
The heart, is made up of, conducting metal has two parts conducting metal and insulator（b1、b2）, pass through insulator（c）Separate.
Auxiliary earth rod P two parts conducting metal is conducting metal b1, conducting metal b2, between insulator c between
Apart from equal；The insulator c and drop bar to be measured conducting metal（a1、a2、a3…an）It is on same horizontal plane.
The current measuring instrument A, is connected to conducting metal b1With drop bar conducting metal to be measured（a1、a2、a3…an）Between,
Can be with automatic switching range.
The pressure measuring instrument V, is connected to conducting metal b2 With drop bar conducting metal to be measured（a1、a2、a3…an）It
Between, can be with automatic switching range.
The conducting metal b1With drop bar conducting metal to be measured（a1、a2、a3…an）Between distance, respectively with conducting metal
b2 With drop bar conducting metal to be measured（a1、a2、a3…an）The distance between it is equal.
The signal processing apparatus 1, carries out digital processing, by collection to the voltage and current detected by measurement apparatus
After A/D conversion data are handled by discrete fourier, the numerical value such as detection resistance value, soil resistivity are calculated.
The control managing device 2, can set to the time of measurement and frequency, and can control the multipoint earthing electricity
Hinder the information transfer between measurement apparatus and analysis processing device.
The analysis processing device 3, the information that the measurement is passed to is stored, is analyzed, shown and recorded.
Using technical scheme, corresponding technique effect is reached, or think in the design for not departing from the present invention
Technical scheme equivalents under thinking, within protection scope of the present invention.
Claims (6)
1. a kind of multipoint earthing electric resistance measurement apparatus, it is characterised in that：By drop bar to be measured, auxiliary earth rod, signal processing device
Put, control managing device, analysis processing device composition, current measurement is connected between the drop bar to be measured and auxiliary earth rod
Instrument, pressure measuring instrument, the current measuring instrument, pressure measuring instrument are connected with signal processing apparatus by Transmission system, described
Signal processing apparatus is connected with control managing device by Transmission system, and the control managing device and analysis processing device are logical
Transmission system is crossed to be connected；The drop bar to be measured is multiple, and the conducting metal of drop bar to be measured is connected to electric current as port
Measuring instrument, pressure measuring instrument, conducting metal are in same horizontal plane；The auxiliary earth rod is one, and burial place exists
The centre of form for the solid that multiple drop bars to be measured are constituted, is made up of two pieces of conducting metals and insulator, and two pieces of conducting metals lead to
Cross insulator to separate, two pieces of distances between conducting metal and insulator are equal, two pieces of conducting metals respectively with it is corresponding to be measured
The distance between drop bar conducting metal is equal, and the conducting metal of the insulator and drop bar to be measured is in same horizontal plane
On.
2. a kind of multipoint earthing electric resistance measurement apparatus according to claim 1, it is characterised in that：The current measuring instrument,
It is connected between auxiliary earth rod conducting metal and drop bar conducting metal to be measured, automatic switching range.
3. a kind of multipoint earthing electric resistance measurement apparatus according to claim 1, it is characterised in that：The pressure measuring instrument,
It is connected between auxiliary earth rod conducting metal and drop bar conducting metal to be measured, automatic switching range.
4. a kind of multipoint earthing electric resistance measurement apparatus according to claim 1, it is characterised in that：The signal processing device
Put, digital processing is carried out to the voltage and current detected by measurement apparatus, the A/D conversion data of collection are passed through into discrete Fu
In leaf processing after, calculate detection resistance value, electric resistance of soil rate score.
5. a kind of multipoint earthing electric resistance measurement apparatus according to claim 1, it is characterised in that：The control management dress
Put, the time and frequency of measurement set, and control the multipoint earthing electric resistance measurement apparatus and analysis processing device it
Between information transfer.
6. a kind of multipoint earthing electric resistance measurement apparatus according to claim 1, it is characterised in that：The analyzing and processing dress
Put, be provided with analysis and processing unit, the information that the measurement is passed to is stored, analyzed, shown and recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746710.4A CN104749442B (en) | 2013-12-31 | 2013-12-31 | A kind of multipoint earthing electric resistance measurement apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746710.4A CN104749442B (en) | 2013-12-31 | 2013-12-31 | A kind of multipoint earthing electric resistance measurement apparatus |
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| Publication Number | Publication Date |
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| CN104749442A CN104749442A (en) | 2015-07-01 |
| CN104749442B true CN104749442B (en) | 2017-11-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2570193A1 (en) * | 1983-10-17 | 1986-03-14 | Peiffert Jean | Method and device for measuring the resistance of earth connections by using as reference the capacitance between a conducting body and the surface of the ground |
| CN1246616A (en) * | 1999-09-17 | 2000-03-08 | 杨学昌 | Monitor of grounding system |
| CN2658753Y (en) * | 2003-08-19 | 2004-11-24 | 福建省电力勘测设计院 | Grounding electrode device used for measuring resistance to ground |
| CN201397364Y (en) * | 2008-12-09 | 2010-02-03 | 武汉市华天电力自动化有限责任公司 | Double-clamp multi-function grounding resistance test instrument |
| CN101923116A (en) * | 2009-06-13 | 2010-12-22 | 孙巍巍 | Grounding resistance measuring system |
| CN101930031A (en) * | 2009-06-24 | 2010-12-29 | 罗望保 | Multi-point simultaneous-measurement digital grounding resistance tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298756A (en) * | 2007-06-04 | 2008-12-11 | Nippon Telegr & Teleph Corp <Ntt> | Ground resistance measuring device and ground resistance measurement method |
-
2013
- 2013-12-31 CN CN201310746710.4A patent/CN104749442B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2570193A1 (en) * | 1983-10-17 | 1986-03-14 | Peiffert Jean | Method and device for measuring the resistance of earth connections by using as reference the capacitance between a conducting body and the surface of the ground |
| CN1246616A (en) * | 1999-09-17 | 2000-03-08 | 杨学昌 | Monitor of grounding system |
| CN2658753Y (en) * | 2003-08-19 | 2004-11-24 | 福建省电力勘测设计院 | Grounding electrode device used for measuring resistance to ground |
| CN201397364Y (en) * | 2008-12-09 | 2010-02-03 | 武汉市华天电力自动化有限责任公司 | Double-clamp multi-function grounding resistance test instrument |
| CN101923116A (en) * | 2009-06-13 | 2010-12-22 | 孙巍巍 | Grounding resistance measuring system |
| CN101930031A (en) * | 2009-06-24 | 2010-12-29 | 罗望保 | Multi-point simultaneous-measurement digital grounding resistance tester |
Non-Patent Citations (1)
| Title |
|---|
| 防雷接地电阻测试分析;丁小平 等;《现代建筑电气》;20120630;第3卷(第6期);第9-11页 * |
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