CN104749442A - Novel multi-point earthing resistance measuring device - Google Patents
Novel multi-point earthing resistance measuring device Download PDFInfo
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- CN104749442A CN104749442A CN201310746710.4A CN201310746710A CN104749442A CN 104749442 A CN104749442 A CN 104749442A CN 201310746710 A CN201310746710 A CN 201310746710A CN 104749442 A CN104749442 A CN 104749442A
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Abstract
The invention relates to a novel multi-point earthing resistance measuring device. The novel multi-point earthing resistance measuring device comprises an earth rod to be measured, an auxiliary earth rod, a current measuring apparatus, a voltage measuring apparatus, a signal processing device, a control management device, an analysis processing device and the like, the current measuring apparatus and voltage measuring apparatus are connected between the earth rod to be measured and the auxiliary earth rod, the current measuring apparatus and voltage measuring apparatus are connected with the signal processing device through transmission systems, the signal processing device is connected with the control management device through a transmission system, and the control management device is connected with the analysis processing device through a transmission system. The novel multi-point earthing resistance measuring device is capable of measuring the soil resistivity when measuring an earthing resistance and capable of simultaneously and automatically measuring a plurality of working points, and moreover, the novel multi-point earthing resistance measuring device only needs one auxiliary earth rod, the earth pile material is saved, and the damage to the working environment is greatly avoided; compared with multiple manual measuring, the cost is saved, the measuring precision is improved, and the measured data can be updated at any time.
Description
Technical field
The present invention relates to electric power electrical apparatus field, particularly relate to a kind of device of novel measurement of Grounding Resistance.
Background technology
Thunder and lightning aloft to be discharged the special meteor of caused one by charged cloud.Thunder and lightning is the major reason causing electronic equipment to damage, and it threatens the safe and stable operation of the every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs.Lightning protection is one of measure solved the problem, in current lightning protection field, earthing device be set to very one of the key link, not only relate to releasing of thunder and lightning, more be related to the normal operation of personal safety, device security and system, present various technical manuals to the concrete setting of earthing device, as parameter, inspection criterion etc. all have explicit stipulation.
The state of real-time understanding stake resistance is very necessary.Under current a lot of working environment, single working point is not often only had to need good earth to avoid the harm because imperfect earth produces, such as assembly line, production line, fuel charger or other similar environment.But common situation is, ground rod or earth mat because bury corrosion of making moist in the ground for a long time, may cause the function that stake resistance is excessive, even lose ground connection; Or because construction is careless or other factors, basic just not excellent with ground or the earth mat of coupling box connects; Or ground rod or earth mat, electrical connection between equipment ground and working point because some reason and open circuit, these all can cause one or more workstation do not have good earth and work the mischief.
The current general existing practice is all the part that only can solve foregoing problems, and modal is exactly with the ground connection of artificial each working point of mode periodic detection.But, periodically check to manually, the fault to ground occurred in during still cannot immediately finding between twice detection; And this mode wastes time and energy, if the destruction of certain degree can be caused in buildings to indoor environment.
The conventional measuring method of stake resistance has megger method, 0.618 method and isosceles triangle method.Megger method is the class methods based on the principle measuring pure resistance, is not suitable for the stake resistance measuring large area earth mat.0.618 method and isosceles triangle method all belong to electric current and voltage method, both by influence of electric potential between the relative position compensating pole between current measuring instrument and pressure measuring instrument.0.618 method and isosceles triangle method just belong to common 3 mensurations.So-called 3 mensurations, are by two of ground resistance measuring instrument p-wires, are connected to the two auxiliary earth rods accomplished fluently in advance, and Article 3 p-wire is connected to ground rod to be measured or grounded screen.
Use 3 mensurations to carry out digital grounding resistance test, measurement of Grounding Resistance can measure soil resistivity again, and have automatic compensation function, not only increase measuring accuracy, also have and prevent the function such as maloperation, intelligent prompt.But during to multiple working point, use 3 mensurations limitation obviously, it is in requisition for multiple auxiliary earth rod, waste pile material, and havoc working environment.
Summary of the invention
In order to effectively solve the above prior-art problems, the present invention proposes a kind of novel multipoint earthing electric resistance measurement mechanism.Maintain and measurement of Grounding Resistance can measure soil resistivity again, and while having the advantage as digital grounding resistance test such as automatic compensation function; Automatically can measure for multiple working point again simultaneously, reach measurement object efficient economizing.Device is made up of ground rod to be measured, auxiliary earth rod, current measuring instrument, pressure measuring instrument and signal processing apparatus, control and management device, APU etc.Described ground rod to be measured is connected current measuring instrument, pressure measuring instrument with between auxiliary earth rod, described current measuring instrument, pressure measuring instrument are connected with signal processing apparatus by transmission system, described signal processing apparatus is connected by transmission system with control and management device, and described control and management device is connected by transmission system with APU.
Described ground rod to be measured has multiple, and the conducting metal of ground rod is connected to current measuring instrument, pressure measuring instrument as port, and conducting metal is in same surface level.
Described auxiliary earth rod only has one, and the centre of form of the solid that burial place surrounds at ground rod to be measured, comprises two pieces of conducting metals and one piece of insulator in auxiliary earth rod.Two parts conducting metal is equal with insulator spacing; The insulator of auxiliary earth rod and the conducting metal of ground rod to be measured are on same surface level.
Described current measuring instrument, is connected between ground rod to be measured and auxiliary earth rod, can automatic switching range.
Described pressure measuring instrument, is connected between ground rod to be measured and auxiliary earth rod, can automatic switching range.
The distance of described auxiliary earth rod two pieces of conducting metals respectively and between corresponding ground rod conducting metal to be measured is equal, at utmost reduces the measurement environment impact on current-voltage measurement complicated and changeable thus.
Described signal processing apparatus, carries out digital processing to detected voltage and current, by the A/D transform data of collection by after discrete fourier process, calculates the numerical value such as detection resistance value, soil resistivity.
Described control and management device, can set the time of measuring and frequency, and can control the information transmission between described multipoint earthing electric resistance measurement mechanism and APU.
Described APU, the information described measurement passed to is carried out storing, analyzes, is shown and record.
Compared with prior art, the invention has the advantages that:
1, use buried device, while measurement of Grounding Resistance, can soil resistivity be measured again, by influence of electric potential between the relative position compensating pole between testing current pole, voltage tester pole to record true resistive value, method accurate science.
2, automatically measure while multiple working point being completed, fundamentally stop the drawback of the high cost expenditure of artificial repetitive measurement, improve testing efficiency and accuracy.
3, only need an auxiliary earth rod, while saving material, farthest avoid again the destruction to working environment.
4, can detect in real time, analyze, process related data information, be that data are in last state, for lightning protection provides latest data information, detects data accurate, avoid the randomness of manual detection and the inefficient phenomenon of statistical study.
5, control treatment device, can control the Measuring Time of current measuring instrument, pressure measuring instrument and frequency, realize intellectualized operation.
Accompanying drawing explanation
Fig. 1 is the horizontal 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 structural principle schematic diagram of the embodiment of the present invention.
Embodiment
Embodiment is discussed below in conjunction with drawings and Examples:
If Fig. 1 is the horizontal sectional view of the embodiment of the present invention: A
1, A
2a
5for ground rod to be measured, P is auxiliarily ground rod, and A is current measuring instrument, and V is pressure measuring instrument.
As vertical section figure: A that Fig. 2 is the embodiment of the present invention
1, A
nfor ground rod to be measured, a
1, a
nfor the conducting metal of ground rod to be measured; P is auxiliarily ground rod, b
1, b
2for the conducting metal of auxiliary earth rod, c is the insulator of auxiliary earth rod; A is current measuring instrument, and V is pressure measuring instrument.
If Fig. 3 is the structure principle chart of the embodiment of the present invention: A
1, A
nfor ground rod to be measured, a
1, a
nfor the conducting metal of ground rod to be measured; P is auxiliarily ground rod, and c is the insulator of auxiliary earth rod; A is current measuring instrument, and V is pressure measuring instrument; 1 is signal processing apparatus, and 2 is control and management device, and 3 is APU.
Except the embodiment shown in Fig. 1,2,3, the present invention can also be other embodiment of multiple earth point measurement mechanism to be measured.
The present invention realizes by the following technical solutions:
Described ground rod to be measured is connected current measuring instrument, pressure measuring instrument with between auxiliary earth rod, described current measuring instrument, pressure measuring instrument are connected with signal processing apparatus by transmission system, described signal processing apparatus is connected by transmission system with control and management device, and described control and management device is connected by transmission system with APU.
Described ground rod (A to be measured
1, A
2, A
3a
n) for multiple, the conducting metal (a of ground rod
1, a
2, a
3a
n) be in same surface level.
Described auxiliary earth rod P only has one, is embedded in ground rod (A to be measured
1, A
2, A
3a
n) form the centre of form of solid, be made up of conducting metal and insulator, conducting metal has two parts (b
1, b
2), separated by insulator (c).
Described auxiliary earth rod P two parts conducting metal is conducting metal b
1, conducting metal b
2, equal with the spacing between insulator c; Conducting metal (a of described insulator c and ground rod to be measured
1, a
2, a
3a
n) be on same surface level.
Described current measuring instrument A, is connected to conducting metal b
1with ground rod conducting metal (a to be measured
1, a
2, a
3a
n) between, can automatic switching range.
Described pressure measuring instrument V, is connected to conducting metal b
2with ground rod conducting metal (a to be measured
1, a
2, a
3a
n) between, can automatic switching range.
Described conducting metal b
1with ground rod conducting metal (a to be measured
1, a
2, a
3a
n) spacing, respectively with conducting metal b
2with ground rod conducting metal (a to be measured
1, a
2, a
3a
n) between distance equal.
Described signal processing apparatus 1, carries out digital processing to the voltage and current detected by measurement mechanism, by the A/D transform data of collection by after discrete fourier process, calculates the numerical value such as detection resistance value, soil resistivity.
Described control and management device 2, can set the time of measuring and frequency, and can control the information transmission between described multipoint earthing electric resistance measurement mechanism and APU.
Described APU 3, the information described measurement passed to is carried out storing, analyzes, is shown and record.
Utilize technical scheme of the present invention, reach corresponding technique effect, or not departing from the technical scheme equivalents under design philosophy of the present invention, all within protection scope of the present invention.
Claims (10)
1. a novel multipoint earthing electric resistance measurement mechanism, it is characterized in that: be made up of ground rod to be measured, auxiliary earth rod, signal processing apparatus, control and management device, APU etc., described ground rod to be measured is connected current measuring instrument, pressure measuring instrument with between auxiliary earth rod, described current measuring instrument, pressure measuring instrument are connected by transmission system with signal processing apparatus, described signal processing apparatus is connected by transmission system with control and management device, and described control and management device is connected by transmission system with APU.
2. the novel multipoint earthing electric resistance measurement mechanism of one according to claim 1, it is characterized in that: described ground rod to be measured has multiple, the conducting metal of ground connection ground rod is connected to current measuring instrument, pressure measuring instrument as port, and conducting metal is in same surface level.
3. the novel multipoint earthing electric resistance measurement mechanism of one according to claim 1, it is characterized in that: described auxiliary earth rod only has one, the centre of form of the solid that burial place is formed at multiple ground rod to be measured, be made up of two pieces of conducting metals and insulator, two pieces of conducting metals are separated by insulator.
4. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-3, is characterized in that: described auxiliary earth rod two parts conducting metal is equal with insulator spacing; The conducting metal of described insulator and ground rod to be measured is on same surface level.
5. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-4, is characterized in that: described current measuring instrument, is connected between auxiliary earth rod conducting metal and ground rod conducting metal to be measured, can automatic switching range.
6. a kind of novel described multipoint earthing electric resistance measurement mechanism according to claim 1-4, is characterized in that: described pressure measuring instrument, is connected between auxiliary earth rod conducting metal and ground rod conducting metal to be measured, can automatic switching range.
7. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-6, is characterized in that: the distance of auxiliary earth rod two pieces of conducting metals respectively and between corresponding ground rod conducting metal to be measured is equal.
8. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-6, it is characterized in that: described signal processing apparatus, digital processing is carried out to the voltage and current detected by measurement mechanism, by the A/D transform data of collection by after discrete fourier process, calculate the numerical value such as detection resistance value, soil resistivity.
9. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-6, it is characterized in that: described control and management device, can set the time of measuring and frequency, and the information transmission between described multipoint earthing electric resistance measurement mechanism and APU can be controlled.
10. the novel multipoint earthing electric resistance measurement mechanism of the one according to claim 1-6, is characterized in that: described APU, is provided with analysis and processing unit, and the information described measurement passed to is carried out storing, analyzes, shown and record.
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|---|---|---|---|
| CN201310746710.4A CN104749442B (en) | 2013-12-31 | 2013-12-31 | A kind of multipoint earthing electric resistance measurement apparatus |
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|---|---|---|---|
| CN201310746710.4A CN104749442B (en) | 2013-12-31 | 2013-12-31 | A kind of multipoint earthing electric resistance measurement apparatus |
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| CN104749442A true CN104749442A (en) | 2015-07-01 |
| CN104749442B CN104749442B (en) | 2017-11-07 |
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Citations (7)
| 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 |
| JP2008298756A (en) * | 2007-06-04 | 2008-12-11 | Nippon Telegr & Teleph Corp <Ntt> | Ground resistance measuring device and ground resistance measurement method |
| 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 |
-
2013
- 2013-12-31 CN CN201310746710.4A patent/CN104749442B/en active Active
Patent Citations (7)
| 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 |
| JP2008298756A (en) * | 2007-06-04 | 2008-12-11 | Nippon Telegr & Teleph Corp <Ntt> | Ground resistance measuring device and ground resistance measurement method |
| 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 |
|---|
| 丁小平 等: "防雷接地电阻测试分析", 《现代建筑电气》 * |
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| CN104749442B (en) | 2017-11-07 |
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